CN109256856A - The platform area topology identifying system and method realized based on power wire broadband carrier (HPLC) - Google Patents
The platform area topology identifying system and method realized based on power wire broadband carrier (HPLC) Download PDFInfo
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- CN109256856A CN109256856A CN201811035233.XA CN201811035233A CN109256856A CN 109256856 A CN109256856 A CN 109256856A CN 201811035233 A CN201811035233 A CN 201811035233A CN 109256856 A CN109256856 A CN 109256856A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00007—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using the power network as support for the transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/121—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using the power network as support for the transmission
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The platform area topology identifying system and method realized based on power wire broadband carrier (HPLC), it is related to a kind of identification technology of distribute-electricity transformer district power network topology, especially a kind of method for the power distribution network topological structure automatic recognition system as means of communication that uses wideband power carrier wave (HPLC), the automatic identification for platform area topological structure.System is made of sender unit and reception signal terminal, and sender unit in-built electrical power line bandwidth carrier (HPLC) communication module is mounted on transformer root；Trapper built in reception signal terminal blocks 50Hz signal, by set specific frequency signal, has the unique ID code of the whole network, is mounted on the inlet wire or leading-out terminal of feeder pillar and ammeter box.Sender unit obtains the ID code of all reception signal terminals first, sends signal, controls the state of reception signal terminal, detects current trend, according to current trend, the father node of automatic identification each feeder pillar and ammeter box, to obtain the topological diagram in entire platform area.The present invention, without carrying out parameter configuration to terminal device, uses HPLC as means of communication, does not have to additional wiring, make full use of the communication advantage of HPLC, quickly and accurately realize identification process in implementation process.
Description
Technical field
The present invention relates to a kind of identification technologies of distribute-electricity transformer district power network topology, especially a kind of to use wideband power carrier wave
(HPLC) method as the power distribution network topological structure automatic recognition system of means of communication.
Background technique
Distribution network topological relation is the basis for realizing power distribution automation.In the newly-built of intelligent substation, reorganization and expansion and fortune
It ties up in maintenance process, the variation of controller switching equipment will lead to the change of platform area distribution network topological relation in distribution network.In order to mention
High power supply quality, it is necessary to grasp the network topology of entire platform area network system " transformer-feeder pillar-ammeter box " in real time
Relationship.
Distribute-electricity transformer district electric network topological relation at present relies primarily on the topological data stayed when the construction of platform area, this side
Formula initially needs manual entry archives when installation, and workload is huge, and the later period is also required to if there is equipment replacement or route variation
Manual entry updates.It also often will appear typing mistake or more new archive not in time in actual use, scene caused actually to be matched
Power network topology and main website are shown inconsistent.
Application of the passive fiber Ethernet (EPON) in power grid provides many possibility to the automatic identification of platform area topology
Technical solution, but in current supply network, mating optical communication network it is considerably less.
With the application of power wire broadband carrier (HPLC), mentioned significantly using the bandwidth and reliability of power line transmission data
Height can extend a variety of applications on this basis.
Summary of the invention
The technical problem to be solved in the present invention is to provide the identifying systems and method of a kind of distribute-electricity transformer district topology, without artificial
Excessive intervention can be with real time automatic update distribute-electricity transformer district power network topology.
To achieve the goals above, the technical solution adopted by the present invention is that: it is a kind of based on HPLC realize platform area topology know
Other system, system include sender unit and reception signal terminal, and sender unit is mounted on transformer root, and signal connects
It receives terminal and is mounted on the feeder pillar in this TV station area and the end of incoming cables of ammeter box or leading-out terminal；
Sender unit includes CPU and support circuit, communication module, signal generator, signal generator selection switch, communication
Module is power wire broadband carrier (HPLC) communication module, and signal generator is connected to by CPU control signal generator selection switch
To A, B or C phase of three-phase power line, the working condition of CPU control signal generator provides frequency when signal generator works
Rate is the sine voltage signal of WHz, and the value range 0-1 of W, the value range of sine voltage is ± 2V- ± 15V；
Reception signal terminal includes CPU and support circuit, communication module, trapper, current transformer and state switch, is led to
Letter module is power wire broadband carrier (HPLC) communication module, and trapper is connected in A, B or C phase of three-phase power line, electricity
Current transformer acts in the power supply line of trapper connection, and current transformer connects CPU, forms current acquisition channel；Trap
Active position of access point of the device in power supply line compared with current transformer, separate transformer；
Trapper blocks 50Hz signal, is WHz by frequency；
State switch is controlled by CPU, and two positions of state switch are respectively as follows: connection trapper and N line, vacancy；
When state switch connects trapper and N line, reception signal terminal is reception state；When being placed on vacancy, letter
Number receive terminal be idle state；
Reception signal terminal is configured with unique ID code, and the identification code of the feeder pillar of ID code association installation site or ammeter box.
Further: sender unit is integrated in intelligent distribution transformer terminals (TTU), and reception signal terminal is integrated in feeder pillar
Terminal and/or distribution transforming end-terminal, the identification code of each terminal itself can regard the ID code of reception signal terminal.
Trapper blocks 50Hz signal, and the WHz voltage signal only sent by signal generator, therefore, signal receive eventually
When end is in reception state, the short circuit of route not will cause.
For convenience, transformer terminal is known as by we, and under the end of platform area power distribution network is known as, two signals are received eventually
The relative position at end is up and down or parallel.
If a reception signal terminal is in reception state, power supply line A, B or C connect N line through trapper, with signal
Generator forming circuit.
When signal generator is in work shape in the sender unit being connected in a power supply line (A, B or C phase)
State, when reception signal terminal is in reception state, the current signal that signal generator generates can largely pass through power supply line,
The trapper for reaching the terminal device in reception state, by above-mentioned circuit.
When sender unit works, and there is reception signal terminal to be in reception state, when forming circuit, by the circuit
Curent change it is obvious, amplitude of variation be greater than load current amplitude of variation.
Based on above system, the invention proposes a kind of area's topology identification methods.
The CPU control signal generator of sender unit selects switch, successively gets on A, B or C phase position, meanwhile,
Sender unit sends order, and the line select switch of all reception signal terminals in this TV station area is got in identical phase line,
In each position of the switch, platform area topology identification method the following steps are included:
Step 1: sender unit sends broadcasting command to all reception signal terminals in this TV station area, it is desirable that reports ID code, is formed
Reception signal terminal equipment list；
Step 2: sender unit sends broadcasting command, sets idle state for all reception signal terminals in this TV station area；
Step 3: the CPU control signal generator of sender unit is started to work；
Step 4: to all reception signal terminals in terminal device inventory, perform the following operation one by one:
Step 4.1: according to its ID, sender unit sends to reception signal terminal and instructs, and is set to reception state；
Step 4.2: current transformer detects all reception signal terminals of curent change, reports information to sender unit
It is stored；Idle state is set by the reception signal terminal in reception state；
Step 4.3: after all reception signal terminals complete step 4.2, sender unit shutdown signal generator；
Step 5: the data that sender unit is obtained according to step 4, to all reception signal terminals in terminal device inventory,
Following judgement is carried out one by one, and the Signal Terminal judged is known as judging terminal:
Step 5.1: finding out and judge terminal in reception state, detect that the changed other signals of electric current receive terminal, such as
Fruit can not find, and the father node with the feeder pillar or ammeter box that judge terminal association is transformer, for the judgement knot for judging terminal
Beam；If it is found, all reception signal terminals found are generated list U, step 5.2 is executed；
Step 5.2: if in list U, only one reception signal terminal, then the associated feeder pillar of the reception signal terminal or
Ammeter box is the father node for judging the feeder pillar or ammeter box of terminal association, terminates for the judgement for judging terminal；If be more than
One, execute step 5.3；
Step 5.3: an optional reception signal terminal in list U finds out the reception signal terminal in reception state, detection
Terminal is received to the changed other signals of electric current, all reception signal terminals found are generated into list V, from list U
The reception signal terminal in list V is removed, new list U is generated, goes to step 5.2；
Step 6: completing in terminal device inventory after the judgement of all reception signal terminals, judging result is generated into platform area topology.
The utility model has the advantages that the present invention is in implementation process, without doing further situ configuration to terminal device, without controlling
Center processed inputs parameter, HPLC can be used as means of communication, do not had to additional cloth with the topological structure in the entire platform area of automatic identification
Line makes full use of the communication advantage of HPLC, quickly and accurately realizes identification process, is platform area fault location, distribution network optimization
Deng offer technical support, carry out intelligent O&M business convenient for electric power enterprise, improves power supply quality.
Detailed description of the invention
Fig. 1 is the schematic diagram of trapper,
Fig. 2 is the composition and connection schematic diagram of sender unit,
Fig. 3 is the composition and connection schematic diagram of reception signal terminal,
Fig. 4 is another embodiment of reception signal terminal,
Fig. 5 is current trend schematic diagram,
Fig. 6 is the flow chart of identification process,
Fig. 7 is the topological schematic diagram in an area Ge Tai.
Wherein, 1 is state switch, and 2 be current transformer, and 3 be access point of the trapper in power supply line, and 4 are
Line select switch, 5 be signal generator selection switch, and 6 switch for Selecting phasing.
Fig. 7 only gives the schematic view of the mounting position of sender unit and reception signal terminal.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
The invention proposes the platform area topology identifying system being made of sender unit and reception signal terminal, signal hairs
Device is sent to be mounted on transformer root, reception signal terminal and the feeder pillar and ammeter box in this TV station area are mating, are mounted on its inlet wire
Or leading-out terminal, since inlet wire end line is simple, it is proposed that be mounted on end of incoming cables.
Referring to Fig. 2, sender unit includes CPU and support circuit, communication module, signal generator, signal generator
Switch 5 is selected, communication module is power wire broadband carrier (HPLC) communication module, and CPU control signal generator selects switch 5 will
Signal generator is connected in A, B or C phase of three-phase power line, the working condition of CPU control signal generator, and signal occurs
The sine wave or square wave voltage signal that frequency is WHz be provided when device works, the value range 0-1 of W, in the present embodiment, W=0.1,
Voltage value is ± 2V- ± 15V, and in the present embodiment, voltage value is ± 5V.The signal and reception signal terminal that signal generator is sent
The trapper of configuration is related.
Since in platform area, some feeder pillars or ammeter box only use phase line connection, therefore, in the present invention, signal occurs
The signal that device issues selects switch 5 by CPU control signal generator, is separately sent to A, B or C phase.
Referring to Fig. 3, reception signal terminal includes CPU and support circuit, communication module, trapper, current transformer 2 and shape
State change-over switch 1, communication module are power wire broadband carrier (HPLC) communication module, and trapper is connected to three-phase power line
A, in B or C phase, current transformer 2 is acted in the power supply line of trapper connection, and current transformer connects CPU, forms electric current
Acquisition channel.
Active position of access point 3 of the trapper in power supply line compared with current transformer 2, separate transformer.It sets in this way
Meter, when reception signal terminal is in reception state, electric current first passes around current transformer 2, using trapper in supply lines
The access point 3 of road, current transformer 2 can detecte the variation of electric current.
It obtains useful signal in order to be more accurate, in reception signal terminal, between current transformer 2 and CPU, also sets
Set trapper.
Trapper blocks 50Hz signal, is WHz by frequency, is 0.1Hz by frequency in the present embodiment.
There are two positions for state switch 1, are controlled by CPU, 1 two positions of state switch are respectively as follows: connection and fall into
Wave device and N line, vacancy.When state switch 1 connects trapper and N line, reception signal terminal is reception state；Work as placement
At vacancy, reception signal terminal is idle state.
Reception signal terminal is configured with unique ID code, and the mark of the feeder pillar of ID code association installation site or ammeter box
Code.
CPU realizes that sender unit and signal connect by the transmitting-receiving order of power wire broadband carrier (HPLC) communication module
Receive the communication of terminal.
The design of trap parameter.
There are many electrical equipment type of ammeter connection, have an equivalent resistance at work, between firewire and zero curve.Simply
Analogy, if the electric current output of ammeter is 10A, the equivalent resistance of electrical equipment is 22 Ω.
One area Ge Tai transformer efficiency is general < 630KWH, under extreme case, and when transformer oepration at full load, entire route
Equivalent resistance be R=U2/P=3802/630000=0.23Ω。
In the case that the resistance of trapper is sufficiently small, the current signal that signal generator generates can largely pass through letter
Number the circuit that terminal is formed is received, fraction can enter electrical equipment.
Therefore, there are two targets for the design of trapper: 1, it is for the resistance of 50Hz signal very big, block 50Hz power frequency letter
Number, 2, by the signal of specific frequency, and under this frequency, resistance is very small.
For sake of convenience, in the following description, unless stated otherwise, the electric current into electrical equipment will be ignored.
Referring to Fig. 1, the impedance of trapper is Z.
Equation group 1
J represents imaginary part, j2=-1.
In order to block 50Hz signal, i.e., in 50Hz power frequency, the impedance of trapper is maximum, and enabling denominator is 0, it may be assumed that
Equation group 2
Equation group 2 is substituted into equation group 1, when obtaining frequency=50Hz, the impedance of trapper is infinity Z=∞, and according to equation group 2
It obtains:
LC=1.0132*10-5 Formula 1
Formula 1 is substituted into equation group 1, is obtained under the conditions of equation group 2, impedance of the trapper in optional frequency are as follows:
Observation above formula can obtain, and in angular frequency to timing, inductance L is bigger, and the impedance of trapper is bigger.
Calculate below, it is assumed that capacitor, inductance precision be 0.1%, π=3.1416, the H of L=0.1037, substitution formula 1 obtain C=
97.7 0uF。
When trapper is 0Hz by frequency, f=0, ω=0, impedance 0, i.e., when trapper passes through direct current, theoretically
There is no impedance.
When trapper is by frequency f=1Hz, Zf=1=0.6518 j。
When trapper is by frequency f=0.1Hz, Zf=0.1= 0.06515j。
Theoretically, for the impedance of power frequency to be infinitely great, but the selection of the precision, parameter due to device, it is impossible to reach
Theoretical value.
For the parameter of selection, when electric power frequency f=50Hz, Zf=50= 568157j。
Using the trapper of above-mentioned parameter, the impedance for 50Hz signal is 0.87M times for 1Hz signal impedance, needle
Impedance to 50Hz signal is 8.7M times for 0.1Hz signal impedance.
To prevent the accidental short circuits such as device failure, trapper can be with series thermal-sensitive resistance, and usually resistance very little, electric current are more than
Resistance increases rapidly when 10A.
The current trend that the voltage signal of signal generator generates.
For reception signal terminal when installing in power supply line, access point 3 of the trapper in power supply line is compared with Current Mutual Inductance
The active position of device 2, far from transformer, i.e. the active position of current transformer is closer away from transformer.In this way, when the signal receives
When terminal is reception state, electric current first passes through the active position of current transformer 2, then reaches the access point 3 of trapper, and electric current is mutual
Sensor 2 can detecte the variation of electric current.
Referring to Fig. 5, current trend is marked using line with the arrow.For sake of convenience, referred to here as the signal of reception state
Reception terminal is target terminal, and current trend is that the electric current of signal generator -> power supply line (A, B or C phase) -> target terminal is mutual
Sensor -> target terminal trapper -> N line.
It can be seen that having electric current process on this downward route from sender unit to target terminal, in this route
On reception signal terminal the electric current all can be detected.
Single-phase linear list case is applicable in.
Due in platform area, some feeder pillars or ammeter box only use phase line connection, sender unit can respectively A,
B, signal is sent in C phase line, matched reception signal terminal will be in every phase all on the feeder pillar or ammeter box of triple line connection
There is response.For this purpose, reception signal terminal further includes the line select switch 4 for connecting CPU referring to Fig. 4, on A, B, C three-phase, point
Not Fang Zhi current transformer and connecting line, in each phase power supply line, the effect of the on-position of connecting line compared with current transformer
Position, far from transformer；The output of current transformer and connecting line are connected to line select switch 4, line select switch 4 it is another
End connection trapper-CPU and trapper-state switch 1, CPU control the movement of line select switch 4.
Prevent the design of signal cross-talk.
In order to reduce the signal interference to other areas, referring to fig. 2, in sender unit, than signal generator
Closer to transformer position setting signal weaken circuit, signal de-emphasis circuit by connect CPU Selecting phasing switch 6 and trap
One end connection current phase of device composition, trapper selects switch 6, and the other end of trapper is connected to N line by resistance R；Phase
The other end of position selection switch 6 is separately connected A, B, C phase line, and there are four position, respectively empty, trappers for Selecting phasing switch 6
It connects A phase line, trapper connection B phase line, trapper and connects C phase line；When signal generator work when, Selecting phasing switch 6 and
Signal generator selects switch 5 synchronous, and when signal generator stops working, Selecting phasing switch 6 is placed on vacancy, referring to fig. 2.
Link position of the Selecting phasing switch 6 in each phase line, more than link position of the signal generator in each phase line
Close to transformer.The effect of signal de-emphasis circuit is the circuit for forming a 0.1Hz signal on signal generator, eliminates
Or weakens to other areas and send 0.1Hz signal.The small resistance for a suitable resistance value of connecting prevents sender unit from sending
0.1Hz signal all flows away from signal de-emphasis circuit, and without reception signal terminal, as shown in Figure 5.
It in current supply network, is equipped under transformer intelligent distribution transformer terminals (TTU), feeder pillar and ammeter box are also all matched
There are feeder pillar terminal and distribution transforming end-terminal, above-mentioned terminal has CPU, control circuit and HPLC module, can to simplify system
Sender unit is integrated in intelligent distribution transformer terminals (TTU), reception signal terminal is integrated in feeder pillar terminal and/or distribution transforming
End-terminal.The reception signal terminal for being mounted on transformer root also can integrate at intelligent distribution transformer terminals (TTU).It does so
Another benefit is that the identification code of each terminal itself can regard the ID code of reception signal terminal, without being associated again.
Proposed by the present invention area's topology identification method is the reception signal terminal that is flowed through according to electric current to be judged.
The CPU control signal generator selection switch 5 and Selecting phasing switch 6 of sender unit, successively get to A, B or
On C phase position, meanwhile, sender unit sends order, and the line select switch 4 of all reception signal terminals in this TV station area is beaten
Onto identical phase line, in each position of the switch, platform area topology identification method the following steps are included:
Step 1: sender unit sends broadcasting command to all reception signal terminals in this TV station area, it is desirable that reports ID code, is formed
Reception signal terminal equipment list.
Step 2: sender unit sends broadcasting command, sets idle shape for all reception signal terminals in this TV station area
State.
Step 3: the CPU control signal generator of sender unit is started to work.
Step 4: to all reception signal terminals in terminal device inventory, perform the following operation one by one:
Step 4.1: according to its ID, sender unit sends to reception signal terminal and instructs, and is set to reception state.
Step 4.2: current transformer detects all reception signal terminals of curent change, and information is reported to send to signal
Device is stored；Idle state is set by the reception signal terminal in reception state.
Step 4.3: after all reception signal terminals complete step 4.2, sender unit shutdown signal generator.
Step 5: the data that sender unit is obtained according to step 4 receive all signals in terminal device inventory
Terminal carries out following judgement one by one, and the Signal Terminal judged is known as judging terminal:
Step 5.1: finding out and judge terminal in reception state, detect that the changed other signals of electric current receive terminal, such as
Fruit can not find, and the father node with the feeder pillar or ammeter box that judge terminal association is transformer, for the judgement knot for judging terminal
Beam；If it is found, all reception signal terminals found are generated list U, step 5.2 is executed.
Step 5.2: if in list U, only one reception signal terminal, then the associated branch of the reception signal terminal
Case or ammeter box are the father nodes for judging the feeder pillar or ammeter box of terminal association, terminate for the judgement for judging terminal；If
It is more than one, execute step 5.3.
Step 5.3: an optional reception signal terminal in list U finds out the reception signal terminal in reception state,
It detects that the changed other signals of electric current receive terminal, all reception signal terminals found is generated into list V, from list
The reception signal terminal in list V is removed in U, is generated new list U, is gone to step 5.2.
Step 6: completing in terminal device inventory after the judgement of all reception signal terminals, judging result generation platform area is opened up
It flutters.
The electric current that generates, the reception signal terminal shape in reception state for voltage signal that signal generator is sent
There is electric current process at the circuit of 0.1Hz signal, on from sender unit to the route of the terminal, on All other routes, flows through
Electric current very little.
Since route is lossy, on the route of sender unit to the reception signal terminal in reception state, away from change
The remoter reception signal terminal of depressor, the electric current detected can be smaller, and the reception signal terminal in reception state is in route
Bottom, the electric current that detects is minimum.
In order not to will cause erroneous judgement, in step 4.2, amplitude judgement is carried out to the variation of electric current, there are two types of judgment methods:
1, when curent change is more than or equal to threshold value, information is reported to be stored to sender unit, threshold value is reception state
The current variation value that detects of reception signal terminal.
2, when curent change is more than or equal to threshold value, information is reported to be stored to sender unit, threshold value is signal
The current variation value that terminal detects is received, greater than the 50% of the current value that signal generator is sent.
Fig. 6 is the flow chart of the above process.
In step 4.2, if the reception signal terminal in reception state can't detect curent change, it may be possible to line
It is influenced caused by the load change on road, in this case, idle state can be set by the reception signal terminal of reception state,
After a period of time, such as 3 seconds, then be configured to receive state, detect electric current again, repeat this process, until detection at
Function.
Above-mentioned influence can also be overcome by the way of increasing signal generator voltage.
Below for ammeter box 17, identification process is described.
For sake of convenience, it in being described below, is mounted on the reception signal terminal at ammeter box X and is known as electricity box x terminal, install
Reception signal terminal at feeder pillar Y is known as branch's Y terminal.
Referring to Fig. 7, when 17 terminal of electricity box is reception state, other reception signal terminals are idle state, in electricity box 17
Terminal forms the circuit of 0.1Hz signal, and the current signal that sender unit generates can flow through branch 3 eventually along power supply line
End, 7 terminal of electricity box, 5 terminal of branch reach 17 terminal of electricity box, into circuit.
As can be seen that feeder pillar 3, ammeter box 7, feeder pillar 5 are in a branch of topological diagram, and at ammeter box 17
In least significant end, but feeder pillar 3, ammeter box 7 are not the father node of ammeter box 17.
List U is generated, includes 3 terminal of branch, 7 terminal of electricity box, 5 terminal of branch in list U.
Optional one from list U, such as 3 terminal of branch, it can be deduced that list V is sky.
Optional one from list U, such as 7 terminal of electricity box, it can be deduced that include 3 terminal of branch in list V.Regenerate table
Single U includes 7 terminal of electricity box, 5 terminal of branch in list U at this time.
Optional one from list U, such as 5 terminal of branch, it can be deduced that include 3 terminal of branch, 7 terminal of electricity box in list V.
List U is regenerated, at this time includes 5 terminal of branch in list U.
There was only 5 terminal of branch in list U at this time, therefore judges that feeder pillar 5 is the father node of ammeter box 17.
According to the above judgment principle, the father node of all ammeter boxes and feeder pillar can be found, is therefore deduced that entire
The topological diagram in platform area.
In Fig. 7, the judgement of each node is as follows:
Feeder pillar 1, feeder pillar 2, ammeter box 0, feeder pillar 3: meet the condition in 5.1, the father node of these nodes is transformation
Device.
Ammeter box 1,2,3: there was only 1 terminal of branch in list U, the father node of these three ammeter boxes is feeder pillar 1.
Feeder pillar 4: ammeter box 4,5,9,10 only has 2 terminal of branch, the father node of these nodes is branch in list U
Case 2.
Ammeter box 13,14,15: 2 terminal of list U Zhong You branch and 4 terminal of branch further judge, can obtain these three
The father node of ammeter box is feeder pillar 4.
Ammeter box 6,7,8: there was only 3 terminal of branch in list U, the father node of these three ammeter boxes is feeder pillar 3.
Ammeter box 11,12, feeder pillar 5: having 3 terminal of 7 terminal of electricity box and branch in list U, further judges, can obtain this
The father node of several nodes is ammeter box 7.
Feeder pillar 6: ammeter box 16,17 has 3 terminal of 7 terminal of electricity box, 5 terminal of branch and branch, further sentences in list U
It is disconnected, it can show that the father node of these nodes is feeder pillar 5.
Ammeter box 18,19,20: there are 7 terminal of electricity box, 6 terminal of 5 terminal of branch, 3 terminal of branch and branch in list U, into one
Step judgement, the father node of these nodes is feeder pillar 6.
Above procedure has found the father node of all feeder pillars and ammeter box, result is merged, and platform area can be generated and open up
It flutters.
In distribution network, some ammeter boxes or feeder pillar are connected using phase line, in this case, can respectively to A,
B, C phase carries out aforesaid operations and judgement, and Rule of judgment is identical, is not discussed herein.
Since transformer is when close to oepration at full load, the equivalent resistance of route is smaller, the electricity that signal generator generates
The component that stream enters electrical equipment can be bigger, it is possible to testing result is influenced, it is therefore, such as small when transformer load is smaller
In the 50% of capacity, topological identification is just carried out.
Claims (8)
1. the platform area topology identifying system that one kind is realized based on power wire broadband carrier (HPLC), which is characterized in that system includes
Sender unit and reception signal terminal, sender unit are mounted on transformer root, and reception signal terminal is mounted on this
The feeder pillar in platform area and the end of incoming cables of ammeter box or leading-out terminal；
Sender unit includes that CPU and support circuit, communication module, signal generator, signal generator select switch (5),
Communication module is power wire broadband carrier (HPLC) communication module, and signal occurs CPU control signal generator selection switch (5)
Device is connected in A, B or C phase of three-phase power line, the working condition of CPU control signal generator, when signal generator works
The sine voltage signal that frequency is WHz, the value range 0-1 of W be provided, the value range of sine voltage be ± 2V- ±
15V；
Reception signal terminal includes CPU and support circuit, communication module, trapper, current transformer and state switch
(1), communication module is power wire broadband carrier (HPLC) communication module, and trapper is connected to A, B or C phase of three-phase power line
On, current transformer acts in the power supply line of trapper connection, and current transformer connects CPU, forms current acquisition channel；
Active position of access point (3) of the trapper in power supply line compared with current transformer, separate transformer；
Trapper blocks 50Hz signal, is WHz by frequency；
State switch (1) is controlled by CPU, and (1) two position of state switch is respectively as follows: connection trapper and N line, sky
Position；
When state switch (1) connects trapper and N line, reception signal terminal is reception state；When being placed on vacancy,
Reception signal terminal is idle state；
Reception signal terminal is configured with unique ID code, and the identification code of the feeder pillar of ID code association installation site or ammeter box.
2. according to claim 1 area's topology identifying system, it is characterised in that: reception signal terminal further includes connection
The line select switch (4) of CPU places current transformer and connecting line, in each phase power supply line on A, B, C three-phase respectively
On, active position of the on-position compared with current transformer of connecting line, separate transformer；The output of current transformer and connecting line
It is connected to line select switch (4), the other end connection CPU and trapper of line select switch (4), CPU control route choosing are opened
Close the movement of (4).
3. according to claim 1 or 2 area's topology identifying system, it is characterised in that: in reception signal terminal, in electric current
Between mutual inductor and CPU, trapper is set.
4. according to claim 1 or 2 area's topology identifying system, it is characterised in that: in sender unit, than
Signal generator closer to transformer position setting signal weaken circuit, signal de-emphasis circuit by connect CPU Selecting phasing
(6) and trapper composition, one end connection current phase selection switch (6) of trapper are switched, the other end of trapper passes through electricity
Resistance (R) is connected to N line；The other end of Selecting phasing switch (6) is separately connected A, B, C phase line, and Selecting phasing switchs there are four (6)
Position, respectively empty, trapper connection A phase line, trapper connection B phase line, trapper connect C phase line；When signal generator work
When making, Selecting phasing switchs (6) and selects switch (5) synchronous with signal generator, when signal generator stops working, phase choosing
It selects switch (6) and is placed on vacancy.
5. according to claim 1 area's topology identifying system, it is characterised in that: sender unit is integrated in intelligence and matches
Transformer terminals (TTU), reception signal terminal are integrated in feeder pillar terminal and distribution transforming end-terminal.
6. a kind of area's topology identification method, it is real that one kind described in claim 1-5 is based on power wire broadband carrier (HPLC)
The area Xian Tai topology identifying system, it is characterised in that:
The CPU control signal generator selection switch (5) of sender unit, successively gets on A, B or C phase position, meanwhile, letter
Number sending device sends order, and the line select switch (4) of all reception signal terminals in this TV station area is got in identical phase line,
In each position of the switch, platform area topology identification method the following steps are included:
Step 1: sender unit sends broadcasting command to all reception signal terminals in this TV station area, it is desirable that reports ID code, is formed
Reception signal terminal equipment list；
Step 2: sender unit sends broadcasting command, sets idle state for all reception signal terminals in this TV station area；
Step 3: the CPU control signal generator of sender unit is started to work；
Step 4: to all reception signal terminals in terminal device inventory, perform the following operation one by one:
Step 4.1: according to its ID, sender unit sends to reception signal terminal and instructs, and is set to reception state；
Step 4.2: current transformer detects all reception signal terminals of curent change, reports information to sender unit
It is stored；Idle state is set by the reception signal terminal in reception state；
Step 4.3: after all reception signal terminals complete step 4.2, sender unit shutdown signal generator；
Step 5: the data that sender unit is obtained according to step 4, to all reception signal terminals in terminal device inventory,
Following judgement is carried out one by one, and the Signal Terminal judged is known as judging terminal:
Step 5.1: finding out and judge terminal in reception state, detect that the changed other signals of electric current receive terminal, such as
Fruit can not find, and the father node with the feeder pillar or ammeter box that judge terminal association is transformer, for the judgement knot for judging terminal
Beam；If it is found, all reception signal terminals found are generated list U, step 5.2 is executed；
Step 5.2: if in list U, only one reception signal terminal, then the associated feeder pillar of the reception signal terminal or
Ammeter box is the father node for judging the feeder pillar or ammeter box of terminal association, terminates for the judgement for judging terminal；If be more than
One, execute step 5.3；
Step 5.3: an optional reception signal terminal in list U finds out the reception signal terminal in reception state, detection
Terminal is received to the changed other signals of electric current, all reception signal terminals found are generated into list V, from list U
The reception signal terminal in list V is removed, new list U is generated, goes to step 5.2；
Step 6: completing in terminal device inventory after the judgement of all reception signal terminals, judging result is generated into platform area topology.
7. according to claim 6 area's topology identification method, it is characterised in that: in step 4.2, when curent change is greater than
When equal to threshold value, information is reported to be stored to sender unit, threshold value is that the reception signal terminal of reception state detects
Current variation value.
8. according to claim 6 area's topology identification method, it is characterised in that: first before carrying out the identification of platform area topology
First judge the working condition of transformer, if the load of transformer is less than the 50% of transformer capacity, executes the identification of platform area topology.
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