CN103887780B

CN103887780B - Based on the network type guard method of the mixed networking that open loop mode runs

Info

Publication number: CN103887780B
Application number: CN201410055383.2A
Authority: CN
Inventors: 黄小耘; 袁钦成; 李春光; 袁启洪; 王娟娟; 董良; 董旭柱; 于力; 彭飞进; 黄红远
Original assignee: Beijing Creative Distribution Automation Co ltd; Foshan Power Supply Bureau of Guangdong Power Grid Corp
Current assignee: Beijing Creative Distribution Automation Co ltd; Foshan Power Supply Bureau of Guangdong Power Grid Corp
Priority date: 2014-02-18
Filing date: 2014-02-18
Publication date: 2015-10-21
Anticipated expiration: 2034-02-18
Also published as: CN103887780A

Abstract

Based on the network type guard method of the mixed networking that open loop mode runs, the circuit breaker run for open loop mode and on-load switch mixed networking system, described group network system comprises the terminal unit that multiple transformer station is connected with described transformer station, it is characterized in that: each described terminal unit comprises intelligent controller and communication module, each described intelligent controller controls circuit breaker or on-load switch, communication module in each described terminal unit only communicates with the described terminal unit of next-door neighbour, intelligent controller in each described terminal unit collects the voltage of circuit breaker in this terminal unit or on-load switch, the electric current that on-load switch in the electric current flowed through and adjacent terminal unit or circuit breaker flow through and fault message.The present invention adopts the communication network of peer-to-peer, communicates mutually between the terminal unit on circuit, collects the fault message of adjacent switch, makes arbitration, realize quick position fault and isolated fault.

Description

Based on the network type guard method of the mixed networking that open loop mode runs

Technical field

The present invention relates to a kind of guard method for intelligent electric power network, particularly relate to a kind of network type guard method of the mixed networking based on the operation of electrical network open loop mode.

Background technology

Power distribution automation is the important component part of intelligent grid, for improve power supply reliability, expand power supply capacity and realize electrical network high-efficiency and economic run significant.Electric network fault process is the core content of power distribution automation, different with the kind of interconnection switch according to the block switch selected, and the automation scheme taked is also different.In traditional distribution system protection, when adopting on-load switch or breaker, any point fault on circuit, all needs substation exit circuit breaker trip, to remove fault.When line end fault, the unnecessary impact of the load in paired transmission line leading portion and stage casing also can be made.When adopting circuit breaker or automatic circuit, if protection can be worked in coordination, fault can be excised on the spot, and this is more satisfactory scheme.In open loop operation, because circuit distance is shorter, short circuit current is large all especially, and cascaded switch is many, and in order to realize selectivity, outlet protection may need to set very long time delay, and this is definitely unallowed in actual motion.In this case, the rapidity of protection and selectivity are a pair implacable contradiction.Meanwhile, when turning for after occurring, differential on whole piece main ring becomes reverse, accurately cannot locate isolated fault during line failure.

The essence of traditional power distribution system current protection is an independently cell protection, and its only detects the electric current that flows through institute's monitoring switch and determines that whether and action delay the action protected, and is indifferent to the protection act situation of adjacent switch.If the scope of monitoring for protection is expanded to by a point one group of switch that the switch that is connected even connects, then the cooperation of the superior and the subordinate's protection can be understood as the internal coordination of protection.The pilot wire protection, carrier current protection etc. of the bus differential protecting of transformer station inside, transformer differential protection, high-pressure system are in order to realize the coordination protected; exactly the electric current at the places such as the line of different location such as circuit both sides, transformer high-low-voltage both sides or three sides, bus is delivered to an inspection center compare and differentiate, thus realize in district or the differentiation of external area error.If but its principle were applied on distribution line, the complexity of power distribution protection and with high costs and lose Practical significance will be caused.

When circuit breaks down, fault message is delivered to control centre by communication port by on-the-spot FTU, control centre is according on off state, fault detection information, Network topology, failure judgement section, issue guidance command, perform a series of automatic operation, reconstructed network, with isolated fault and the power supply recovering non-faulting section, this i.e. so-called centralized intelligence.This scheme precise control, is applicable to various complication system.But it needs the computer soft and hardware system of reliable communication channel and control centre, and it is long to complete once " location, isolation, turn confession " required time.

As China Patent No. CN200510024379.0 patent of invention, publication date is on September 20th, 2006, disclose a kind of electric power transmission network control method without main website, described electric power transmission network control method comprises: failure detection steps: corresponding feeder terminal unit detection failure power supply, and sends fault message to all feeder terminal units; Fault location step: feeder terminal unit, according to fault message, positions fault point; Fault Isolation step: fault point feeder terminal unit separating brake, and instruction downstream feeder terminal unit separating brake; Separating brake reporting step: fault point feeder terminal unit and downstream feeder terminal unit send state information; Service restoration step: open loop point closes a floodgate.Owing to not adopting master station computer in control method of the present invention, even if the communication failure of therefore indivedual feeder terminal unit and main website, control algolithm of the present invention also can minimize on use isolated fault, and whole network can not be caused to recover.In such scheme, each current feed terminal needs to send information to all current feed terminals, each current feed terminal all needs the information table setting up all current feed terminals, thus judge voluntarily to realize controlling according to the state of all current feed terminals, this technical scheme is only suitable for open loop models, all current feed terminals communicate normal situation to each other and full circuit breaker network model.Each current feed terminal needs to send information to all current feed terminals, and each current feed terminal all needs the information table setting up all current feed terminals, and the processing time is long, and the response time is slow.

Summary of the invention

Technical problem to be solved by this invention is the deficiency overcoming above-mentioned prior art, provide a kind ofly respond that action is fast, terminal burden is light, the network type guard method of the mixed networking run based on open loop mode of system stability.

According to the network type guard method of a kind of mixed networking based on open loop mode operation provided by the invention, the circuit breaker run for open loop mode and on-load switch mixed networking system, described group network system comprises the terminal unit that multiple transformer station is connected with described transformer station, it is characterized in that: each described terminal unit comprises intelligent controller and communication module, each described intelligent controller controls circuit breaker or on-load switch, each described terminal unit only communicates with the described terminal unit of next-door neighbour, intelligent controller in each described terminal unit collects the voltage of circuit breaker in this terminal unit or on-load switch, the electric current that on-load switch in the electric current flowed through and adjacent terminal unit or circuit breaker flow through and fault message, for the terminal unit controlling described circuit breaker, when intelligent controller in each described terminal unit detects fault current, communicate with adjacent described terminal unit, when not having fault current to flow out when there being fault current to flow into, then illustrate that fault occurs in the switching range of this terminal unit control, intelligent controller in this terminal unit starts fast tripping protection function or overcurrent protection function and the circuit breaker trip controlled in this terminal unit, when having fault current inflow and fault current to flow out, then illustrate that fault does not occur in the switching range of this terminal unit control, the circuit breaker that the intelligent controller in this terminal unit controls in this terminal unit is in backup status, for the terminal unit controlling described on-load switch, on-load switch self overcurrent, when very short time, internal fault electric current disappeared again, communicate with adjacent described terminal unit, fault current is not had to flow out when there being fault current to flow into, after described on-load switch self decompression defluidization, start separating brake, otherwise be failure to actuate.Very short time in this process is generally the time that higher level's circuit breaker excises fault.

According to the network type guard method of a kind of mixed networking based on open loop mode operation provided by the invention, also there is following attached technical characteristic:

Preferred embodiment is: it is whole or several that each described terminal unit has in following function: fast tripping protection function, overcurrent protection function, reclosing function, obtain electric coincidence function, successful reclosing latch-up protection function in short-term, be incorporated into quick tripping function after fault, fault current pulse detection function, on-load switch Fault Isolation function, obtain electric time-delay closing function, to close a floodgate successfully locking separating brake function in short-term, be incorporated into separating brake blocking function after fault, interlocking dead electricity time delay separating brake blocking function, dead electricity time delay separating brake not blocking function, residual voltage pulse separating brake blocking function, one-sided decompression time-delay closing function, inspection locking one-sided decompression time-delay closing function.

Preferred embodiment is: when communicating normal; next-door neighbour closes the circuit breaker of the described terminal unit of transformer station or breaks down between on-load switch and closed transformer station; and the described terminal unit control of the closed transformer station of next-door neighbour is described circuit breaker or on-load switch, protection act is as follows:

After wire-outgoing breaker in A, closed transformer station detects fault current, start fast tripping protection function or overcurrent protection function;

Wire-outgoing breaker in B, closed transformer station starts reclosing function subsequently;

After wire-outgoing breaker in C, closed transformer station detects fault current again, fast trip;

Intelligent controller in the described terminal unit of D, the closed transformer station of next-door neighbour starts dead electricity time delay separating brake not blocking function and residual voltage pulse separating brake blocking function, circuit breaker or on-load switch separating brake;

E, one of them is close to other transformer stations intelligent controller be in the described terminal unit of open loop point and starts one-sided decompression time-delay closing function or inspection locking one-sided decompression time-delay closing function, on-load switch or breaker closing.

Preferred embodiment is: when communicating normal, and fault point is positioned at the described terminal unit controlling described circuit breaker, and terminal unit control described in the next stage of this terminal unit is on-load switch or circuit breaker, and protection act is as follows:

After A, the intelligent controller being positioned at the described terminal unit of fault point detect fault current, start fast tripping protection function or overcurrent protection function, circuit breaker trip;

B, the intelligent controller of described terminal unit being positioned at fault point start reclosing function and quick tripping function after being incorporated into fault, and circuit breaker first closes a floodgate and trips afterwards;

C, the intelligent controller being positioned at the described terminal unit of fault point next stage start interlocking dead electricity time delay separating brake blocking function, on-load switch or breaker open operation;

D, one of them is close to the intelligent controller that other transformer stations are in the described terminal unit of open loop point and starts one-sided decompression time-delay closing function or inspection locking one-sided decompression time-delay closing function, on-load switch or breaker closing.

Preferred embodiment is: when communicating normal, and fault point is positioned at below the described terminal unit of the described on-load switch of control, and protection act is as follows:

After A, the described terminal unit being arranged in the control circuit breaker of fault point higher level detect fault current, start fast tripping protection function or overcurrent protection function, circuit breaker trip;

B, the intelligent controller startup separator current impulse measuring ability being positioned at the described terminal unit of fault point and on-load switch Fault Isolation function, on-load switch is separating brake under electroless state;

C, the described terminal unit startup reclosing function being arranged in the control circuit breaker of fault point higher level and successful reclosing latch-up protection function in short-term, breaker closing;

D, the intelligent controller being positioned at the described terminal unit of fault point next stage start interlocking dead electricity time delay separating brake blocking function, circuit breaker or on-load switch separating brake;

E, one of them is close to the intelligent controller that other transformer stations are in the described terminal unit of open loop point and starts one-sided decompression time-delay closing function or inspection locking one-sided decompression time-delay closing function, on-load switch or breaker closing.

Preferred embodiment is: when communicating normal, is close to other transformer stations and is between the described terminal unit of open loop point and the described terminal unit of next-door neighbour and breaks down, and this terminal unit controls is described circuit breaker, and protection act is as follows:

C, the described terminal unit being in open loop point being positioned at fault point subordinate detect adjacent described terminal unit fault message, be in on-load switch in the described terminal unit of open loop point or circuit breaker receives adjacent switch fault message, continue to keep gate-dividing state not close a floodgate.

Preferred embodiment is: when being arranged in the intelligent controller generation communication abnormality of described terminal unit of fault point; fault point is positioned at the described terminal unit control range controlling described circuit breaker; and terminal unit control described in the next stage of this terminal unit is on-load switch, protection act is as follows:

A, the intelligent controller being arranged in the described terminal unit of fault point detect that fault current flows into but can not receive the fault message of adjacent end unit, start fast tripping protection function or overcurrent protection function, circuit breaker trip;

If what terminal unit described in the higher level of B fault point controlled is circuit breaker, the intelligent controller controlling circuit breaker detects that fault current flows into but can not receive the fault message of adjacent end unit, starts fast tripping protection function or overcurrent protection function, circuit breaker trip; Then be positioned at intelligent controller that fault point higher level controls circuit breaker and start to obtain latch-up protection function in short-term after electric coincidence function and successful reclosing;

If what terminal unit described in the higher level of C fault point controlled is on-load switch, what terminal unit described in higher level controlled again is circuit breaker, the intelligent controller controlling circuit breaker detects that fault current flows into but can not receive the fault message of circuit breakers terminal unit, start fast tripping protection function or overcurrent protection function, circuit breaker trip; The intelligent controller startup separator current impulse measuring ability of control overhead switch and on-load switch Fault Isolation function, without on-load switch separating brake in electric situation; Then the intelligent controller controlling circuit breaker starts to obtain latch-up protection function in short-term after electric coincidence function and successful reclosing; The intelligent controller of control overhead switch starts to obtain electric time-delay closing closing a floodgate successfully.

D, the intelligent controller being arranged in the described terminal unit of fault point start to obtain electric coincidence function and quick tripping function after being incorporated into fault, and circuit breaker first closes a floodgate and trips afterwards;

E, the intelligent controller startup interlocking dead electricity time delay separating brake blocking function being positioned at the described terminal unit of fault point next stage and residual voltage pulse separating brake blocking function, on-load switch separating brake;

F, one of them is close to other transformer stations intelligent controller be in the described terminal unit of open loop point and starts one-sided decompression time-delay closing function or inspection locking one-sided decompression time-delay closing function, and circuit breaker or on-load switch close a floodgate.

Preferred embodiment is: when being arranged in fault point higher level and controlling the intelligent controller generation communication abnormality of the described terminal unit of described circuit breaker; fault point is positioned at the below of the described terminal unit controlling described on-load switch; and terminal unit control described in the next stage of this terminal unit is circuit breaker, protection act is as follows:

After A, the described terminal unit being positioned at the control circuit breaker of fault point higher level detect fault current, start fast tripping protection function or overcurrent protection function, circuit breaker trip;

B, the intelligent controller startup separator current impulse measuring ability being positioned at the described terminal unit of fault point and on-load switch Fault Isolation function, without on-load switch separating brake in electric situation;

C, the described terminal unit being positioned at the control circuit breaker of fault point higher level start to obtain electric coincidence function, breaker closing;

D, the intelligent controller being positioned at the described terminal unit of fault point start to obtain electric time-delay closing function, and on-load switch closes a floodgate;

E, the described terminal unit startup fast tripping protection function being positioned at the control circuit breaker of fault point higher level or overcurrent protection function, circuit breaker trip;

F, the intelligent controller being positioned at the described terminal unit of fault point start and are incorporated into separating brake blocking function after fault, on-load switch separating brake;

G, the described terminal unit of control circuit breaker being positioned at fault point higher level start reclosing function, breaker closing;

H, the intelligent controller being positioned at the described terminal unit of fault point next stage start interlocking dead electricity time delay separating brake blocking function, breaker open operation;

I, one of them is close to the intelligent controller that other transformer stations are in the described terminal unit of open loop point and starts one-sided decompression time-delay closing function or inspection locking one-sided decompression time-delay closing function, on-load switch or breaker closing.

Preferred embodiment is: when normal but in the described terminal unit of fault point the on-load switch machinery that communicates is failure to actuate extremely; fault point is positioned at the described terminal unit controlling described on-load switch; and terminal unit control described in the next stage of this terminal unit is circuit breaker, protection act is as follows:

B, the intelligent controller startup separator current impulse measuring ability being positioned at the described terminal unit of fault point and on-load switch Fault Isolation function, send separating brake order, because machinery is abnormal, and on-load switch tripping;

After C, the described terminal unit being positioned at the control circuit breaker of fault point higher level receive the on-load switch tripping signal of terminal unit described in fault point, lock-reclosing lock function;

After D, the described terminal unit being positioned at fault point next stage receive the on-load switch tripping signal being positioned at fault point, start interlocking dead electricity time delay separating brake blocking function, separating brake;

Preferred embodiment is: when normal but in the described terminal unit of fault point the breaker mechanical that communicates is failure to actuate extremely; fault point is positioned at below the described terminal unit of the described circuit breaker of control; and terminal unit described in the next stage of this terminal unit is in open loop point, protection act is as follows:

After A, the described terminal unit being positioned at the control circuit breaker of fault point detect fault current, start fast tripping protection function or overcurrent protection function, send trip signal, because machinery is abnormal, circuit breaker tripping;

B, be positioned at fault point higher level, be in after the described terminal unit of the control circuit breaker of backup status receives the circuit breaker tripping signal of terminal unit described in fault point, circuit breaker trip;

The described terminal unit startup separator current impulse measuring ability of the described terminal unit in C, steps A and the control overhead switch between the described terminal unit in step B and on-load switch Fault Isolation function, on-load switch separating brake;

D, be arranged in the described terminal unit that fault point higher level controls circuit breaker and start reclosing function and successful reclosing latch-up protection function in short-term, breaker closing;

E, one of them is close to after intelligent controller that other transformer stations are in the described terminal unit of open loop point receives the circuit breaker tripping signal of terminal unit described in fault point, and on-load switch or circuit breaker are in blocking and do not close a floodgate.

According to provided by the invention a kind of based on open loop mode run mixed networking network type guard method compared with prior art tool have the following advantages: the present invention adopts the communication network of peer-to-peer; communicate mutually between terminal unit on circuit; collect the fault message of adjacent switch; make arbitration, realize quick position fault and isolated fault.Possess following several large advantage: 1. the mixed networking being applicable to circuit breaker and on-load switch, strong to power network switch apparatus adaptability; 2, speed is fast, impacts little to circuit.Because what the present invention adopted is proactive dissemination fault message, instead of the repeating query mode adopted in the past, thus greatly save the time.3. logical algorithm is simple and reliable.The logic criterion adopted only need know the protection starting state of oneself and adjacent switch, simple and fast and very reliable.4. disobey rascal station.Because of without the need to protecting substation, dissolved that substation paralysis may bring risk.5. provide backup protection.All switches experiencing fault, if judge oneself non-faulting end, then proceed to standby.Once end switch trips unsuccessfully, then excise fault by back-up switch.6. strong adaptability.The electric network of electric pressure at different levels can easily be applicable to, and need not the syndeton of worry about network and the operational mode of system.

Accompanying drawing explanation

Fig. 1 is networking reduced graph of the present invention.

Fig. 2 is another kind of networking reduced graph of the present invention.

Fig. 3 is another networking reduced graph of the present invention.

Embodiment

See Fig. 1, in the network type guard method of a kind of mixed networking based on open loop mode operation provided by the invention, the circuit breaker run for open loop mode and on-load switch mixed networking system, described group network system comprises the terminal unit that multiple transformer station is connected with described transformer station, each described terminal unit comprises intelligent controller and communication module, each described intelligent controller controls a circuit breaker or an on-load switch, each described terminal unit is only communicated with the described terminal unit of next-door neighbour by communication module, intelligent controller in each described terminal unit collects the voltage of circuit breaker in this terminal unit or on-load switch, the electric current that on-load switch in the electric current flowed through and adjacent terminal unit or circuit breaker flow through and fault message.

For the terminal unit controlling described circuit breaker, when communicating normal or abnormal, when intelligent controller in each described terminal unit detects fault current, communicate with adjacent described terminal unit, when not having fault current to flow out when there being fault current to flow into, then illustrate that fault occurs in the switching range that this terminal unit controls, intelligent controller in this terminal unit starts fast tripping protection function or overcurrent protection function and the circuit breaker trip controlled in this terminal unit; When having fault current inflow and fault current to flow out, then illustrate that fault does not occur in the switching range of this terminal unit control, the circuit breaker that the intelligent controller in this terminal unit controls in this terminal unit is in backup status.

For the terminal unit controlling described on-load switch; when communicating normal or abnormal; on-load switch self overcurrent; when very short time, internal fault electric current disappeared again; communicating with adjacent described terminal unit, not having fault current to flow out, after described on-load switch self decompression defluidization when there being fault current to flow into; start separating brake, otherwise be failure to actuate.Very short time in this process is generally the time that higher level's circuit breaker excises fault.

The mixed networking that the present invention provides refer to circuit breaker and on-load switch used in combination.Wherein on-load switch is under rated voltage and rated current.Only allow to switch on and off load current, but do not allow interrupting short circuit.When connection switch is on-load switch, he coordinates with higher level's circuit breaker, after higher level's circuit breaker removes fault, starts separating brake.Circuit breaker has carried or unloaded line and electric equipment for having switched on and off, and when being short-circuited, can disengagement failure or again close a floodgate automatically, can play the effect of control and protection two aspect.When connection switch is circuit breaker, it after short trouble occurs, can cut-off fault current, and carries out one or many reclosing according to setting requirement.In mixed networking, a circuit breaker can be with an on-load switch or multiple on-load switch.Each terminal unit can control a circuit breaker or an on-load switch, also multiple circuit breaker or multiple on-load switch or circuit breaker and on-load switch mixed structure can be controlled in this terminal unit, such as in each terminal unit, arrange a ring main unit, each terminal unit can control all circuit breakers in a ring main unit and on-load switch.Control principle and a circuit breaker and on-load switch similar, carry out arranging according to identical control principle.A circuit breaker given by the present invention and on-load switch are for convenience of description and understand, as the most basic control unit, be not limitation of the present invention, those of ordinary skill in the art according to the most basic control unit, can extend in the control unit of multiple switch composition.In the present invention, so-called switch refers to the general designation of circuit breaker and on-load switch.

In actual applications, as long as same user only has a power supply to power the time in office all can be considered open loop mode.As shown in Figure 3.The switch 12,16,21 connected on the left of circuit breaker (or on-load switch) 17 in Fig. 3 can regard a switches set (be circuit breaker entirely or be that on-load switch or circuit breaker mix with on-load switch entirely) as, and the switch 12,18,22 of right side connection also can regard a switches set (be circuit breaker entirely or be that on-load switch or circuit breaker mix with on-load switch entirely) as.When a failure occurs it, as long as arbitrary circuit has fault current to flow into circuit breaker (or on-load switch) 17 in left-side switch group, just can be considered and have fault current to flow into; Right side in like manner.Be equivalent to the structure of the switch that the present invention provides, the guard method of basis for estimation still given by the present invention.

In Fig. 3 represent the switch being in "on" position; represent the switch being in gate-dividing state.

The criterion point that in the present invention, circuit breaker is main: main criterion source is the fault current of circuit breaker itself and adjacent on-load switch or circuit breaker; that is: when communicating normal or abnormal; when this breaker protection detects short circuit current, communicate with adjacent on-load switch or breaker protection.When not having big current to flow out (as opposite side switch protection does not detect protective current) when there being big current to flow into (as side protection detects short circuit current); then illustrate that fault occurs in this breaker protection district, start this locality and protect quick-break or overcurrent protection to trip.Otherwise oneself is only protected in support.

The criterion point that in the present invention, on-load switch is main: main criterion source is the fault current of on-load switch itself and circuit breakers or on-load switch, that is: when communicating normal or abnormal, self overcurrent of the on-load switch of fault end, when very short time, internal fault electric current disappeared again, communicating with adjacent circuit breaker or on-load switch protection, not having big current to flow out (as opposite side switch protection does not detect fault current) when there being big current to flow into (as side protection detects short circuit current); After self decompression defluidization, start separating brake.Otherwise be failure to actuate.Very short time in this process is generally the time that higher level's circuit breaker excises fault.

Terminal unit of the present invention only communicates with adjacent terminal unit, and adopt distributed intelligence control mode, the process information of each terminal unit reduces greatly, alleviates the load of processor, the time under reach.Communication module in terminal unit in the present invention can be independent setting, also can be integrated in intelligent controller.

In the present invention, it is whole or several that each described terminal unit has in following function: fast tripping protection function, overcurrent protection function, reclosing function, obtain electric coincidence function, successful reclosing latch-up protection function in short-term, be incorporated into quick tripping function after fault, fault current pulse detection function, on-load switch Fault Isolation function, obtain electric time-delay closing function, to close a floodgate successfully locking separating brake function in short-term, be incorporated into separating brake blocking function after fault, interlocking dead electricity time delay separating brake blocking function, dead electricity time delay separating brake not blocking function, residual voltage pulse separating brake blocking function, one-sided decompression time-delay closing function, inspection locking one-sided decompression time-delay closing function.

The concrete meaning of above-mentioned functions is:

1.1, fast tripping protection function

1) network type fast tripping protection function under normal circumstances:

Network service is normal-> self overcurrent and exceed quick-break definite value, and the left and right sides only has side overcurrent, without " latch-up protection " mark-> switch automatic brake separating;

2) fast tripping protection backup protection function:

Network service is normal-> self overcurrent and exceed quick-break definite value, the equal overcurrent in the left and right sides, without " latch-up protection " mark-> fault current sustainable existence--> standby time delay is to rear switch automatic brake separating;

3) fault-tolerant fast tripping protection function:

Self overcurrent of network service exception-> and exceed quick-break definite value; the left and right sides finds that there is side overcurrent or without overcurrent, without " latch-up protection " mark-> switch automatic brake separating--the fault-tolerant tripping operation flag set of >.

1.2, overcurrent protection function

1) network type overcurrent protection function under normal circumstances:

Network service is normal-> self overcurrent and exceed overcurrent definite value but be less than quick-break definite value, the left and right sides only has side overcurrent, without " latch-up protection " mark-> delay time to-> switch automatic brake separating;

2) overcurrent protection emergency function

Network service is normal-> self overcurrent and exceed overcurrent definite value but be less than quick-break definite value, without " latch-up protection " mark-> overcurrent delay time, the equal overcurrent in the left and right sides, adds that standby delay time is to rear-> switch automatic brake separating;

3) fault-tolerant overcurrent protection function:

Self overcurrent of network service exception-> and exceed overcurrent definite value but be less than quick-break definite value; the left and right sides finds that there is side overcurrent (or without overcurrent), without " latch-up protection " mark-> delay time to-> switch automatic brake separating--the fault-tolerant fault trip flag set of >.

1.3, reclosing function

1) the reclosing function under normal condition

Communication under normal circumstances, after switch quick-break/overcurrent protection tripping operation, switch does not indicate without " lock-reclosing lock " at co-bit->, be more than or equal to 1 without " residual voltage pulse "-> " coincidence number of times ", " fault trip " flag set-> delay time is to-> switch automatic closing;

2) the reclosing function after backup protection action

Communication under normal circumstances; after switch quick-break/overcurrent backup protection tripping operation; switch does not indicate without " lock-reclosing lock " at co-bit->; be more than or equal to 1 without " residual voltage pulse "-> " coincidence number of times ", " fault trip " flag set-> delay time is to-> switch automatic closing.

1.4, electric coincidence function is obtained

Reclosing function under fault-tolerant state:

There is pressure switch side--and > switch is not in co-bit-> " fault-tolerant fault trip " flag set, without " locking obtains electric coincidence " mark, without " residual voltage pulse ", there is pressure-> delay time switch side to-> switch automatic closing.

1.5, successful reclosing latch-up protection function in short-term

" reclosing " or " electric coincidence " successful reclosing-> " latch-up protection mark " set, the electric current that breaks down (fault current duration is greater than protection time delay, is less than protection time delay+latch-up protection time delay in short-term)--> protection is failure to actuate-and > delay time is to-> " latch-up protection mark " removing.

1.6, quick tripping function after fault is incorporated into

After switch co-bit-> " reclosing " or " electric coincidence " overlap, detect that overcurrent-> sets delay time to-> switch automatic brake separating.

1.7, fault current pulse detection function

Self overcurrent, fault disappears again within a certain period of time, down pulse set.

1.8, on-load switch Fault Isolation function

1) Fault Isolation under normal condition:

Switch co-bit-> communication is normal, > " separating brake locking " flag set that " down pulse " flag set--> communicates with adjacent switch, and there is overcurrent opposite side adjacent switch side without overcurrent--> self decompression defluidization-> switch automatic brake separating locking--

2) Fault Isolation under fault-tolerant state

Switch co-bit-> communication abnormality (there is communication nothing communication or only side), > " separating brake not locking " flag set that " down pulse " flag set--> communicates with adjacent switch, and there is side overcurrent (or completely without overcurrent) left and right sides--> self decompression defluidization-> switch automatic brake separating--

1.9, electric time-delay closing function is obtained

Switch divides position-> without " residual voltage pulse ", " separating brake not locking " flag set, and without separating brake locking mark, there is pressure-> delay time switch side to-> switch automatic closing.

1.10, to close a floodgate successfully locking separating brake function in short-term

Switch is in a point position, and--> obtains electric time-delay closing, and--> does not detect fault current within the setting time limit, and--> start in short-term locking separating brake mark (delay time can set)-> delay time to rear--> removes " in short-term locking separating brake " indicates.

1.11, fault separating brake blocking function is incorporated into

----> separating brake locking that > detects fault current within the setting time limit--> detects with no pressure without stream again--that > obtains electric time-delay closing that switch is in a point position.

1.12, interlocking dead electricity time delay separating brake blocking function

Normal (exception)-> self the decompression defluidization of network service; receive adjacent switch " protection fault trip " (or " on-load switch fault trip ") mark-> delay time to-> switch automatic brake separating and locking, put " separating brake locking " flag bit.

1.13, dead electricity time delay separating brake not blocking function

Be generally used for the switch of next-door neighbour's power supply:

Self decompression defluidization-> delay time is to-> switch automatic brake separating not locking.

1.14, residual voltage pulse separating brake blocking function

Switch divides position, detects that residual voltage pulse-> " separating brake not locking " mark is converted to " separating brake locking " mark.

1.15, one-sided decompression time-delay closing function

Even if this functional requirement can not confirm adjacent switch fault-free, decompression also can turn confession after time delay:

There is pressure switch point position-> switch side, and without " locking turns confession " mark, the abnormal or normal adjacent switch fault-free trip mark-> delay time that communicates of communicating is to-> switch automatic closing.

1.16, locking one-sided decompression time-delay closing function is examined

This functional requirement only has confirmation adjacent switch fault-free mark just likely to turn confession:

Switch point position-> network service is normal-and there is pressure > switch side, without " locking turns confession " mark, adjacent switch fault-free trip mark-> delay time is to-> switch automatic closing.

Below in conjunction with networking reduced graph, illustrate when breaking down, guard method embodiment of the present invention:

Fig. 1 is the mixed networking reduced graph that open loop mode runs.S1, S3 are circuit breaker, and T2, T4 are on-load switch; It is "on" position when S1, T2, S3 system is normally run; T4 is interconnection switch, is gate-dividing state when system is normally run, thus forms open loop mode; One station terminal (including two groups of PT) comprises communication module, intelligent controller and controls circuit breaker or on-load switch by intelligent controller, by the mutual information to each other of switch between described terminal unit.Give Liang Ge transformer station in Fig. 1, transformer station wire-outgoing breaker CB1, CB2 adjust No. 1 reclosing function.

Embodiment 1, when communication is normal, breaks down between the described terminal unit of the closed transformer station of next-door neighbour and closed transformer station, and the described terminal unit control of the closed transformer station of next-door neighbour is described circuit breaker, the F1 place, fault point namely in Fig. 1, and protection act is as follows:

After wire-outgoing breaker CB1 in A, closed transformer station ES1 detects fault current, start fast tripping protection function or overcurrent protection function;

Wire-outgoing breaker CB1 in B, closed transformer station ES1 starts reclosing function subsequently;

After wire-outgoing breaker CB1 in C, closed transformer station ES1 detects fault current again, fast trip; Complete the isolation of fault point.

Intelligent controller in the described terminal unit of D, the closed transformer station ES1 of next-door neighbour starts dead electricity time delay separating brake not blocking function and residual voltage pulse separating brake blocking function, circuit breaker S1 separating brake;

E, one of them is close to other transformer stations ES2 intelligent controller be in the described terminal unit of open loop point and starts one-sided decompression time-delay closing function or inspection locking one-sided decompression time-delay closing function, and on-load switch T4 closes a floodgate.Realize turning power supply.

Embodiment 2, when communicating normal, fault point is positioned at the described terminal unit controlling described circuit breaker, and terminal unit control described in the next stage of this terminal unit is on-load switch, the fault point F2 namely in Fig. 1, and protection act is as follows:

After A, the intelligent controller being positioned at the described terminal unit of fault point detect fault current, start fast tripping protection function or overcurrent protection function, circuit breaker S1 trips;

B, the intelligent controller of described terminal unit being positioned at fault point start reclosing function and quick tripping function after being incorporated into fault, and circuit breaker S1 first closes a floodgate and trips afterwards;

C, the intelligent controller being positioned at the described terminal unit of fault point next stage start interlocking dead electricity time delay separating brake blocking function, on-load switch T2 separating brake; Realize the isolation of fault point.

D, one of them is close to the intelligent controller that other transformer stations are in the described terminal unit of open loop point and starts one-sided decompression time-delay closing function or inspection locking one-sided decompression time-delay closing function, and on-load switch T4 closes a floodgate.Realize turning power supply.

Fault point higher level circuit breaker refers to the circuit breaker of traction fault point on-load switch in the present invention, and fault point subordinate circuit breaker refers to the circuit breaker of traction fault point next stage on-load switch.Fault point next stage on-load switch refers to the on-load switch of other side, fault point.Following examples are identical.

Embodiment 3, when communicating normal, fault point is positioned at the described terminal unit controlling described on-load switch, the fault point F3 namely in Fig. 1, and protection act is as follows:

After A, the described terminal unit being arranged in the control circuit breaker S1 of fault point higher level detect fault current, start fast tripping protection function or overcurrent protection function, circuit breaker S1 trips;

B, the intelligent controller startup separator current impulse measuring ability being positioned at the described terminal unit of fault point and on-load switch Fault Isolation function, on-load switch T2 separating brake;

C, the described terminal unit startup reclosing function being arranged in the control circuit breaker S1 of fault point higher level and successful reclosing latch-up protection function in short-term, circuit breaker S1 closes a floodgate;

D, the intelligent controller being positioned at the described terminal unit of fault point next stage start interlocking dead electricity time delay separating brake blocking function, circuit breaker S3 separating brake; Realize the isolation to fault point.

E, one of them is close to the intelligent controller that other transformer stations are in the described terminal unit of open loop point and starts one-sided decompression time-delay closing function or inspection locking one-sided decompression time-delay closing function, and on-load switch T4 closes a floodgate.Realize turning power supply.

Embodiment 4, when communicating normal, being close to other transformer stations and being between the described terminal unit of open loop point and the described terminal unit of next-door neighbour and breaking down, and this terminal unit controls is described circuit breaker, the fault point F4 namely in Fig. 1, and protection act is as follows:

After A, the intelligent controller being positioned at the described terminal unit of fault point detect fault current, start fast tripping protection function or overcurrent protection function, circuit breaker S3 trips;

B, the intelligent controller of described terminal unit being positioned at fault point start reclosing function and quick tripping function after being incorporated into fault, and circuit breaker S3 first closes a floodgate and trips afterwards; Realize the isolation to fault point.

C, the described terminal unit being in open loop point being positioned at fault point subordinate detect adjacent described terminal unit fault message, and the on-load switch T4 be in the described terminal unit of open loop point continues to keep gate-dividing state not close a floodgate.

Can be found out by above-mentioned four embodiments, when breaking down, the electric current that the present invention can flow through according to the on-load switch in circuit breaker or the voltage of on-load switch, the electric current flowed through and adjacent terminal unit or circuit breaker and fault message, realize action fast, location isolated fault point, and turn power supply.

Embodiment 5; when being arranged in the communication module generation communication abnormality of described terminal unit of fault point; fault point is positioned at below the described terminal unit of the described circuit breaker of control; and terminal unit control described in the next stage of this terminal unit is on-load switch; namely F2 point breaks down in FIG; the terminal unit generation communication abnormality at circuit breaker S1 place, protection act is as follows:

A, the intelligent controller of described terminal unit being arranged in fault point detect fault current, but can not receive the fault message of adjacent end unit, and start fast tripping protection function or overcurrent protection function, circuit breaker S1 trips;

B, the intelligent controller being arranged in the described terminal unit of fault point start to obtain electric coincidence function and quick tripping function after being incorporated into fault, and circuit breaker S1 first closes a floodgate and trips afterwards; Circuit breaker S1 tripping operation-close a floodgate-tripping operation, is equivalent to generation pulse signal.

C, the intelligent controller startup interlocking dead electricity time delay separating brake blocking function being positioned at the described terminal unit of fault point next stage and residual voltage pulse separating brake blocking function, on-load switch T2 separating brake; Realize the isolation to fault point.

D, one of them is close to other transformer stations intelligent controller be in the described terminal unit of open loop point and starts one-sided decompression time-delay closing function or inspection locking one-sided decompression time-delay closing function, and on-load switch T4 closes a floodgate.Realize turning power supply.

Embodiment 6; when being arranged in fault point higher level and controlling the intelligent controller generation communication abnormality of the described terminal unit of described circuit breaker; fault point is positioned at below the described terminal unit of the described on-load switch of control; and terminal unit control described in the next stage of this terminal unit is circuit breaker; namely F3 in FIG breaks down; the terminal unit generation communication abnormality at circuit breaker S1 place, protection act is as follows:

After A, the described terminal unit being positioned at the control circuit breaker S1 of fault point higher level detect fault current, start fast tripping protection function or overcurrent protection function, circuit breaker S1 trips;

C, the described terminal unit being positioned at the control circuit breaker S1 of fault point higher level start to obtain electric coincidence function, and circuit breaker S1 closes a floodgate;

D, the intelligent controller being positioned at the described terminal unit of fault point start to obtain electric time-delay closing function, and on-load switch T2 closes a floodgate;

E, the described terminal unit startup fast tripping protection function being positioned at the control circuit breaker S1 of fault point higher level or overcurrent protection function, circuit breaker S1 trips;

F, the intelligent controller being positioned at the described terminal unit of fault point start and are incorporated into separating brake blocking function after fault, on-load switch T2 separating brake;

G, the described terminal unit of control circuit breaker S1 being positioned at fault point higher level start reclosing function, and circuit breaker S1 closes a floodgate;

H, the intelligent controller being positioned at the described terminal unit of fault point next stage start interlocking dead electricity time delay separating brake blocking function, circuit breaker S3 separating brake; Isolated fault point.

I, one of them is close to the intelligent controller that other transformer stations are in the described terminal unit of open loop point and starts one-sided decompression time-delay closing function or inspection locking one-sided decompression time-delay closing function, and on-load switch T4 closes a floodgate.Realize turning power supply.

Embodiment 7; when normal but in the described terminal unit of fault point the on-load switch machinery that communicates is failure to actuate extremely; fault point is positioned at the described terminal unit controlling described on-load switch; and terminal unit control described in the next stage of this terminal unit is circuit breaker; namely F3 place breaks down in FIG; on-load switch T2 tripping, protection act is as follows:

B, the intelligent controller startup separator current impulse measuring ability being positioned at the described terminal unit of fault point and on-load switch Fault Isolation function, send separating brake order, because machinery is abnormal, and on-load switch T2 tripping;

After C, the described terminal unit being positioned at the control circuit breaker S1 of fault point higher level receive the on-load switch T2 tripping signal of terminal unit described in fault point, lock-reclosing lock function;

After D, the described terminal unit (i.e. the terminal unit at circuit breaker S3 place) being positioned at fault point next stage receive the on-load switch T2 tripping signal being positioned at fault point, start interlocking dead electricity time delay separating brake blocking function, circuit breaker S3 separating brake;

E, one of them is close to the intelligent controller that other transformer stations are in the described terminal unit of open loop point and starts one-sided decompression time-delay closing function or inspection locking one-sided decompression time-delay closing function, and on-load switch T4 closes a floodgate.

Embodiment 8; when normal but in the described terminal unit of fault point the breaker mechanical that communicates is failure to actuate extremely; fault point is positioned at below the described terminal unit of the described circuit breaker of control; and terminal unit described in the next stage of this terminal unit is in open loop point; namely F4 place breaks down in FIG; circuit breaker S3 tripping, protection act is as follows:

After A, the described terminal unit being positioned at the control circuit breaker S3 of fault point detect fault current, start fast tripping protection function or overcurrent protection function, send trip signal, because machinery is abnormal, circuit breaker S3 tripping;

B, be positioned at fault point higher level, be in after the described terminal unit of the control circuit breaker S1 of backup status receives the circuit breaker S3 tripping signal of terminal unit described in fault point, start fast tripping protection function or overcurrent protection function, circuit breaker S1 trips;

The described terminal unit startup separator current impulse measuring ability of the described terminal unit in C, steps A and the control overhead switch T2 between the described terminal unit in step B and on-load switch Fault Isolation function, on-load switch T2 separating brake;

D, be arranged in the described terminal unit that fault point higher level controls circuit breaker S1 and start reclosing function and successful reclosing latch-up protection function in short-term, circuit breaker S1 closes a floodgate;

E, one of them is close to other transformer stations and is in after the on-load switch T4 of the described terminal unit of open loop point or circuit breaker start and receive the circuit breaker tripping signal of terminal unit described in fault point, is in blocking and does not close a floodgate.

See Fig. 2, the networking reduced graph that another open loop mode that the present invention provides runs.T1, T2, T3, T4 are on-load switch; It is "on" position when T1, T2, T3 system is normally run; T4 is interconnection switch, is gate-dividing state when system is normally run; One station terminal unit (including two groups of PT) comprises communication module, intelligent controller and controls an on-load switch by intelligent controller, by the mutual information to each other of switch; Transformer station wire-outgoing breaker CB1, CB2 adjust No. 2 reclosing functions.

The protection philosophy of the present embodiment is same as the previously described embodiments, and such as, when communicating normal, F1 place, fault point breaks down, and course of action is as follows:

After wire-outgoing breaker CB1 in A, closed transformer station experiences fault current, fast tripping protection action;

Wire-outgoing breaker CB1 reclosing action in B, closed transformer station;

After wire-outgoing breaker CB1 in C, closed transformer station is incorporated into fault, fast trip;

Wire-outgoing breaker CB1 reclosing action in D, closed transformer station;

After wire-outgoing breaker CB1 in E, closed transformer station is incorporated into fault, fast trip;

Intelligent controller in the described terminal unit of F, the closed transformer station of next-door neighbour starts dead electricity time delay separating brake not blocking function and residual voltage pulse separating brake blocking function; On-load switch T1 separating brake;

G, one of them be close to other transformer stations intelligent controller be in the described terminal unit of open loop point start one-sided decompression time-delay closing function or inspection locking one-sided decompression time-delay closing function (both only have one to adjust), on-load switch T4 closes a floodgate.

When communicating normal, F2 place, fault point breaks down, and protection act process is as follows:

Intelligent controller startup separator current impulse measuring ability in the terminal unit at B, on-load switch T1 place and on-load switch Fault Isolation function; On-load switch T1 separating brake;

Wire-outgoing breaker CB1 reclosing action in C, closed transformer station; Close a floodgate;

Intelligent controller in the terminal unit at D, on-load switch T2 place starts interlocking dead electricity time delay separating brake blocking function; On-load switch T2 separating brake;

Intelligent controller in the terminal unit at E, on-load switch T4 place starts one-sided decompression time-delay closing function or inspection locking one-sided decompression time-delay closing function (both only have to adjust), and on-load switch T4 closes a floodgate.

When communicating normal, F3 place, fault point breaks down, and protection act process is as follows:

Intelligent controller startup separator current impulse measuring ability in the terminal unit at B, on-load switch T2 place and on-load switch Fault Isolation function; On-load switch T2 separating brake;

Intelligent controller in the terminal unit at D, on-load switch T3 place starts interlocking dead electricity time delay separating brake blocking function; On-load switch T3 separating brake;

When communicating normal, F4 place, fault point breaks down, and protection act process is as follows:

Intelligent controller startup separator current impulse measuring ability in the terminal unit at B, on-load switch T3 place and on-load switch Fault Isolation function; On-load switch T3 separating brake;

Intelligent controller in the terminal unit at D, on-load switch T4 place detects adjacent switch fault trip, is in blocking and does not close a floodgate;

When the terminal unit generation communication abnormality at on-load switch T1 place, fault point F1 breaks down, and protection act process is as follows:

Wire-outgoing breaker CB1 reclosing action in B, closed transformer station;

Wire-outgoing breaker CB1 reclosing action in D, closed transformer station;

Intelligent controller in the terminal unit at F, on-load switch T1 place starts dead electricity time delay separating brake not blocking function and residual voltage pulse separating brake blocking function; On-load switch T1 separating brake;

Intelligent controller in the terminal unit at G, on-load switch T2 place starts interlocking dead electricity time delay separating brake blocking function; Separating brake;

Intelligent controller in the terminal unit at H, on-load switch T4 place starts " one-sided decompression time-delay closing " function or " the one-sided decompression time-delay closing of inspection locking " function (both only have to adjust), and on-load switch T4 closes a floodgate;

Intelligent controller in the terminal unit at I, on-load switch T2 place starts to obtain electric time-delay closing function; Close a floodgate.

When the terminal unit generation communication abnormality at on-load switch T1 place, F2 place, fault point breaks down, and protection act process is as follows:

Intelligent controller in the terminal unit at D, on-load switch T1 place starts to obtain electric time-delay closing function; On-load switch T1 closes a floodgate.

After wire-outgoing breaker CB1 in E, closed transformer station experiences fault current, fast tripping protection action;

Intelligent controller in the terminal unit at F, on-load switch T1 place starts and is incorporated into separating brake blocking function after fault; On-load switch T1 separating brake;

Wire-outgoing breaker CB1 reclosing action in G, closed transformer station; Close a floodgate;

Intelligent controller in the terminal unit at H, on-load switch T2 place starts interlocking dead electricity time delay separating brake blocking function and residual voltage pulse separating brake blocking function; On-load switch T2 separating brake;

Intelligent controller in the terminal unit at I, on-load switch T4 place starts one-sided decompression time-delay closing function or inspection locking one-sided decompression time-delay closing function (both only have to adjust), and on-load switch T4 closes a floodgate.

When communicating normal, F2 place, fault point breaks down, on-load switch T2 tripping, and protection act process is as follows:

Intelligent controller in the terminal unit at D, on-load switch T2 place starts interlocking dead electricity time delay separating brake blocking function; Send out separating brake order; But because machinery is abnormal, on-load switch T2 tripping;

After intelligent controller in the terminal unit at E, on-load switch T3 place receives the switch failure signal of on-load switch T2, start interlocking dead electricity time delay separating brake blocking function; On-load switch T3 separating brake;

Intelligent controller in the terminal unit at F, on-load switch T4 place starts " one-sided decompression time-delay closing " function or " the one-sided decompression time-delay closing of inspection locking " function (both only have to adjust), and on-load switch T4 closes a floodgate.

When communicating normal, F3 place, fault point fault, on-load switch T3 tripping, protection act process is as follows:

Function that intelligent controller in the terminal unit at D, on-load switch T3 place starts " locking of interlocking dead electricity time delay separating brake "; Send out separating brake order; But because machinery is abnormal, on-load switch T3 tripping;

E, on-load switch T4 are in blocking and do not close a floodgate after receiving the switch failure signal of on-load switch T3.

In the above-mentioned enforcement that the present invention provides, each step can repeatedly according to the integration number of times of setting, and some step wherein is synchronously carried out, and also has the sequencing of some steps to exchange.Sequence of movement according to power supply power supply or electric and determine.What in above-described embodiment that the present invention provides, start correlation function is all intelligent controllers in terminal unit, and separating brake, tripping operation or combined floodgate be all circuit breaker or on-load switch.

Clearly can learn that the present invention is not only applicable to the protection under normal condition by above-described embodiment, and can also realize for protection when communication failure and machinery exception.Locate the fault in quarantine networking under all kinds of situation flexibly fast.

Claims

1. based on the network type guard method of the mixed networking of open loop mode operation, the circuit breaker run for open loop mode and on-load switch mixed networking system, described group network system comprises the terminal unit that multiple transformer station is connected with described transformer station, it is characterized in that: each described terminal unit comprises intelligent controller and communication module, each described intelligent controller controls circuit breaker or on-load switch, each described terminal unit only communicates with the described terminal unit of next-door neighbour, intelligent controller in each described terminal unit collects the voltage of circuit breaker in this terminal unit or on-load switch, the electric current that on-load switch in the electric current flowed through and adjacent terminal unit or circuit breaker flow through and fault message,

For the terminal unit controlling described circuit breaker, when intelligent controller in each described terminal unit detects fault current, communicate with adjacent described terminal unit, when not having fault current to flow out when there being fault current to flow into, then illustrate that fault occurs within the scope of the circuit breaker that this terminal unit controls, intelligent controller in this terminal unit starts fast tripping protection function or overcurrent protection function and the circuit breaker trip controlled in this terminal unit; When having fault current inflow and fault current to flow out, then illustrate that fault does not occur within the scope of the circuit breaker of this terminal unit control, the circuit breaker that the intelligent controller in this terminal unit controls in this terminal unit is in backup status,

For the terminal unit controlling described on-load switch, on-load switch self overcurrent, when very short time, internal fault electric current disappeared again, communicate with adjacent described terminal unit, not having fault current to flow out when there being fault current to flow into, described on-load switch self decompression defluidization, starting separating brake, otherwise be failure to actuate, the very short time in this process is at least the time that higher level's circuit breaker excises fault.

2. as claimed in claim 1 based on the network type guard method of the mixed networking of open loop mode operation, it is characterized in that: it is whole or several that each described terminal unit has in following function: fast tripping protection function, overcurrent protection function, reclosing function, obtain electric coincidence function, successful reclosing latch-up protection function in short-term, be incorporated into quick tripping function after fault, fault current pulse detection function, on-load switch Fault Isolation function, obtain electric time-delay closing function, to close a floodgate successfully locking separating brake function in short-term, be incorporated into separating brake blocking function after fault, interlocking dead electricity time delay separating brake blocking function, dead electricity time delay separating brake not blocking function, residual voltage pulse separating brake blocking function, one-sided decompression time-delay closing function, inspection locking one-sided decompression time-delay closing function.

3. as claimed in claim 2 based on the network type guard method of the mixed networking of open loop mode operation; it is characterized in that: when communicating normal; next-door neighbour closes the circuit breaker of the described terminal unit of transformer station or breaks down between on-load switch and closed transformer station; and the described terminal unit control of the closed transformer station of next-door neighbour is described circuit breaker, protection act is as follows:

4. as claimed in claim 2 based on the network type guard method of the mixed networking of open loop mode operation; it is characterized in that: when communicating normal; fault point is positioned at below the described terminal unit of the described circuit breaker of control; and terminal unit control described in the next stage of this terminal unit is on-load switch or circuit breaker, protection act is as follows:

5., as claimed in claim 2 based on the network type guard method of the mixed networking of open loop mode operation, it is characterized in that: when communicating normal, fault point is positioned at the described terminal unit controlling described on-load switch, and protection act is as follows:

B, the intelligent controller startup separator current impulse measuring ability being positioned at the described terminal unit of fault point and on-load switch Fault Isolation function, on-load switch separating brake;

6. as claimed in claim 2 based on the network type guard method of the mixed networking of open loop mode operation; it is characterized in that: when communicating normal; be close to other transformer stations to be between the described terminal unit of open loop point and the described terminal unit of next-door neighbour and to break down; and the control of this terminal unit is described circuit breaker, protection act is as follows:

C, the described terminal unit being in open loop point being positioned at fault point subordinate detect adjacent described terminal unit fault message, are in on-load switch in the described terminal unit of open loop point or circuit breaker continues to keep gate-dividing state not close a floodgate.

7. as claimed in claim 2 based on the network type guard method of the mixed networking of open loop mode operation; it is characterized in that: when being arranged in the intelligent controller generation communication abnormality of described terminal unit of fault point; fault point is positioned at the described terminal unit controlling described circuit breaker; and terminal unit control described in the next stage of this terminal unit is on-load switch, protection act is as follows:

A, the intelligent controller of described terminal unit being arranged in fault point detect fault current, but can not receive the fault message of adjacent end unit, start fast tripping protection function or overcurrent protection function, circuit breaker trip;

If what terminal unit described in the higher level of C fault point controlled is on-load switch, what terminal unit described in higher level controlled again is circuit breaker, the intelligent controller controlling circuit breaker detects that fault current flows into but can not receive the fault message of circuit breakers terminal unit, start fast tripping protection function or overcurrent protection function, circuit breaker trip; The intelligent controller startup separator current impulse measuring ability of control overhead switch and on-load switch Fault Isolation function, without on-load switch separating brake in electric situation; Then the intelligent controller controlling circuit breaker starts to obtain latch-up protection function in short-term after electric coincidence function and successful reclosing; The intelligent controller of control overhead switch starts to obtain electric time-delay closing close a floodgate successfully;

8. as claimed in claim 2 based on the network type guard method of the mixed networking of open loop mode operation; it is characterized in that: when being arranged in fault point higher level and controlling the intelligent controller generation communication abnormality of the described terminal unit of described circuit breaker; fault point is positioned at below the described terminal unit of the described on-load switch of control; and terminal unit control described in the next stage of this terminal unit is circuit breaker, protection act is as follows:

9. as claimed in claim 2 based on the network type guard method of the mixed networking of open loop mode operation; it is characterized in that: when normal but in the described terminal unit of fault point the on-load switch machinery that communicates is failure to actuate extremely; fault point is positioned at below the described terminal unit of the described on-load switch of control; and terminal unit control described in the next stage of this terminal unit is circuit breaker, protection act is as follows:

After D, the described terminal unit being positioned at fault point next stage receive the on-load switch tripping signal being positioned at fault point, start interlocking dead electricity time delay separating brake blocking function;

10. as claimed in claim 2 based on the network type guard method of the mixed networking of open loop mode operation; it is characterized in that: when normal but in the described terminal unit of fault point the breaker mechanical that communicates is failure to actuate extremely; fault point is positioned at below the described terminal unit of the described circuit breaker of control; and terminal unit described in the next stage of this terminal unit is in open loop point, protection act is as follows: