CN111162505A - Multistage light gas protection device and method - Google Patents
Multistage light gas protection device and method Download PDFInfo
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- CN111162505A CN111162505A CN202010076900.XA CN202010076900A CN111162505A CN 111162505 A CN111162505 A CN 111162505A CN 202010076900 A CN202010076900 A CN 202010076900A CN 111162505 A CN111162505 A CN 111162505A
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- 238000004891 communication Methods 0.000 claims abstract description 36
- 230000009471 action Effects 0.000 claims description 105
- 230000000903 blocking effect Effects 0.000 claims description 12
- 230000001934 delay Effects 0.000 claims description 12
- 230000001681 protective effect Effects 0.000 claims description 12
- 230000005856 abnormality Effects 0.000 claims description 9
- 230000007547 defect Effects 0.000 abstract description 7
- 238000011161 development Methods 0.000 abstract description 6
- 230000004044 response Effects 0.000 abstract description 4
- 238000013461 design Methods 0.000 description 13
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- 238000012544 monitoring process Methods 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
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Abstract
The application discloses multistage light gas protection device and method, and the device includes: the power supply comprises a state acquisition module, a power supply side signal acquisition module, a state judgment module, a communication module and an output protection module; the state acquisition module, the power supply side signal acquisition module, the communication module and the output protection module are all connected with the state judgment module; the state acquisition module is used for acquiring light gas contact state data and transformer operation parameters and transmitting the light gas contact state data and the transformer operation parameters to the state judgment module; the power supply side signal acquisition module is used for acquiring the operation parameters of the power supply side of the transformer and transmitting the operation parameters to the state judgment module. The method and the device solve the problems that due to the limitation of the prior art level, operation maintainers cannot find the defect of the internal fault of the main transformer, and the development condition of the internal fault of the main transformer body has no obvious extrinsic characteristic response, so that the problems are difficult to find in time.
Description
Technical Field
The application relates to the technical field of gas relays, in particular to a multistage light gas protection device and method.
Background
The existing gas relay uses the internal fault of the transformer to make the oil or insulating material decompose to generate gas or cause the oil flow to surge, so as to make the contact of the gas relay act and send out the alarm signal (light gas) or automatically cut off the transformer (heavy gas). When light gas mainly reflects operation or slight faults (such as overload heating, iron core local heating, oil tank heating caused by magnetic leakage and the like), gas decomposed by oil or insulating materials rises to enter a gas collection chamber of the gas relay, the oil level slowly descends due to air pressure, a float bowl or an opening cup of the relay falls along with the oil level, a contact of a light gas dry spring is connected to send a signal, and the action of heavy gas is caused due to the further descending of the oil level or the increase of oil-gas flow. Heavy gas mainly reflects that when serious faults such as bushing grounding, turn-to-turn short circuit and the like occur in the transformer, a large amount of gas is quickly generated to push oil flow to impact a baffle plate, and a magnet on the baffle plate attracts a heavy gas dry spring contact to be conducted to trip.
Generally, after the light gas action sends an alarm signal, a worker is arranged to confirm the actual conditions (including appearance abnormality, gas leakage, sound abnormality, whether gas in the light gas chamber is combustible, and the like) of the main transformer body on site, and then reports the actual conditions to a professional technician according to the actual conditions on site to confirm whether power failure occurs to perform related inspection (including gas analysis, main transformer related tests, gas relay inspection, related loop inspection, and the like), so as to determine whether the main transformer internal fault occurs. The existing gas relay generally sends an alarm signal through a single light gas action to remind an operation maintainer to carry out on-site inspection on whether each part of a transformer is abnormal or not, and meanwhile, the gas components of the light gas action are inspected. In the process, the arrival time of personnel is uncertain, operation maintainers cannot find the defect of the internal fault of the main transformer due to the limitation of the prior art after the personnel arrive, and the development condition of the internal fault of the main transformer body has no obvious external characteristic quantity response, so that the problems are difficult to find in time.
Disclosure of Invention
The application provides a multistage light gas protection device and method, and by means of real-time monitoring and control of various parameters of a transformer, the problems that due to the limitation of the prior art level, operation maintainers cannot find the defect of the internal fault of a main transformer, and the development condition of the internal fault of a main transformer body does not have obvious extrinsic characteristic quantity response, so that the problems are difficult to find in time are solved.
The application in a first aspect provides a multistage light gas protection device, includes:
the power supply comprises a state acquisition module, a power supply side signal acquisition module, a state judgment module, a communication module and an output protection module;
the state acquisition module, the power supply side signal acquisition module, the communication module and the output protection module are all connected with the state judgment module;
the state acquisition module is used for acquiring light gas contact state data and transformer operation parameters and transmitting the light gas contact state data and the transformer operation parameters to the state judgment module;
the power supply side signal acquisition module is used for acquiring the operation parameters of the power supply side of the transformer and transmitting the operation parameters to the state judgment module;
the state judging module respectively judges whether abnormality exists according to the state data, the transformer operation parameters and the operation parameters of the transformer power supply side, if so, the communication module gives out warning prompt to the output protection tripping and locking and closing command module, and the output protection module gives out corresponding protection actions, locking and closing and warning prompt signals.
Optionally, the communication module includes a transformer high-voltage side network interface, a transformer medium-voltage side network interface, and a transformer low-voltage side network interface, which are all configured to receive a corresponding other electric quantity protection action signal and issue a corresponding trip command and a corresponding closing locking command.
Optionally, the state acquisition module includes a transformer operation parameter acquisition unit, and is connected to the state judgment module, and is configured to acquire state parameters of a circuit breaker on a power supply side of the transformer and acquire other electric quantity protection start signals of the transformer.
Optionally, the state collection module includes light gas contact state collection unit 1, light gas contact state collection unit 2 and light gas contact state collection unit 3, with the state judgment module is connected, light gas contact state collection unit 1 is used for the collection of the 1 st light gas contact state, the collection of the 2 nd light gas contact state and the collection of the 3 rd light gas contact state, light gas contact state collection unit 2 is used for the collection of the 4 th light gas contact state, the collection of the 5 th light gas contact state and the collection of the 6 th light gas contact state, light gas contact state collection unit 3 is used for the collection of the 7 th light gas contact state, the collection of the 8 th light gas contact state and the collection of the 9 th light gas contact state.
Optionally, the action time difference between the 1 st light gas contact and the 2 nd light gas contact forms light gas delay 1 protection, the action time difference between the 2 nd light gas contact and the 3 rd light gas contact forms light gas delay 2 protection, the light gas delay 1 protection is designed with 2 sections of settable delays, and the light gas delay 2 protection is designed with 2 sections of settable delays, so that tripping or alarming can be selectively put into operation; the action time difference between the 3 rd light gas contact and the 4 th light gas contact forms light gas delay 3 protection, the action time difference between the 4 th light gas contact and the 5 th light gas contact forms light gas delay 4 protection, 2 sections of the light gas delay 3 protection are designed to be settable delay, and 2 sections of the light gas delay 4 protection are designed to be settable delay, so that tripping or alarming can be selected; the action time difference between the 7 th light gas contact and the 8 th light gas contact forms light gas delay 5 protection, the action time difference between the 8 th light gas contact and the 9 th light gas contact forms light gas delay 6 protection, 2 sections of the light gas delay 5 protection are designed to be settable delay, and 2 sections of the light gas delay 6 protection are designed to be settable delay, so that tripping or alarming can be selected.
Optionally, the power supply side signal acquisition module comprises a current acquisition unit and a voltage acquisition unit, which are both connected with the state judgment module; the current acquisition unit is used for acquiring three-phase current at the power supply side of the transformer and zero-sequence current at the power supply side of the transformer; the voltage acquisition unit is used for acquiring the three-phase voltage of the power supply side of the transformer.
Optionally, the output protection module includes a high-voltage side trip contact, a transformer medium-voltage side trip contact and a transformer low-voltage side trip contact which are connected in parallel, and a gas protection action trip blocking transformer high-voltage side switch-on contact, a blocking transformer medium-voltage side switch-on contact, a blocking transformer low-voltage side switch-on contact, a blocking transformer high-voltage side related switch-on loop contact, a blocking transformer medium-voltage side related switch-on loop contact and a blocking transformer low-voltage side related switch-on loop contact which are connected in parallel.
Optionally, the output protection module further comprises: after a breaker on the power supply side is in a closing state, the light gas is accelerated to carry out 1-6 protective tripping, and after a transformer has an electric protection action and is started, the light gas is accelerated to carry out 1-6 protective tripping; after the transformer autonomously protects the electric quantity, the light gas is accelerated to delay 1 to 6 times to protect tripping.
The output protection module comprises a multistage light gas protection tripping contact, a multistage light gas protection warning contact and a light gas abnormity warning contact which are connected in parallel.
The second aspect of the present application provides a multistage light gas protection method, which is performed by the multistage light gas protection device of the first aspect, and includes the steps of:
acquiring light gas contact state data, transformer operation parameters and operation parameters of a transformer power supply side;
and judging whether the abnormity exists according to the light gas contact state data, the transformer operation parameters and the operation parameters of the transformer power supply side, and if so, giving a warning through a communication interface.
In order to solve the technical problem that exists among the prior art, this application provides a multistage light gas protection device, includes:
the power supply comprises a state acquisition module, a power supply side signal acquisition module, a state judgment module, a communication module and an output protection module;
the state acquisition module, the power supply side signal acquisition module, the communication module and the output protection module are all connected with the state judgment module;
the state acquisition module is used for acquiring light gas contact state data and transformer operation parameters and transmitting the light gas contact state data and the transformer operation parameters to the state judgment module;
the power supply side signal acquisition module is used for acquiring the operation parameters of the power supply side of the transformer and transmitting the operation parameters to the state judgment module;
the state judging module respectively judges whether abnormality exists according to the state data, the transformer operation parameters and the operation parameters of the transformer power supply side, if so, the communication module gives out warning prompt to the output protection tripping and locking and closing command module, and the output protection module gives out corresponding protection actions, locking and closing and warning prompt signals.
The application provides a multistage light gas protection device can be through the operating parameter of the state data of the light gas contact that monitors respectively acquireing, transformer and transformer power supply side to all transmit these data to the state judgement module. The state judgment module sends a command to the output fuzzy module through the communication interface provided by the communication module when judging that the data corresponding to a certain interface is abnormal through the judgment of the data, so that the output protection module reacts to the corresponding credit loan according to the command to prompt that the operating items corresponding to the interface outside have faults. The transformer internal fault monitoring system based on the real-time monitoring and control solves the problems that due to the limitation of the prior art, operation maintainers cannot find the internal fault defect of a main transformer, and the development condition of the internal fault of a main transformer body has no obvious external characteristic quantity response, so that the problems are difficult to find in time.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a multistage light gas protection device provided in the present application;
fig. 2 is a schematic flow chart of a multistage light gas protection method provided by the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Because the existing gas relay generally sends out an alarm signal through a single light gas action to remind an operation maintainer to check whether the transformer is abnormal or not and simultaneously check the gas components triggering the light gas action. However, in the whole process, the time for the operation maintainer to arrive at the alarm site is uncertain, the operation maintainer arrives at the alarm site due to the limitation of the prior art, and the operation maintainer cannot easily check the defects in the main transformer body due to the fact that the faults caused by the defects in the main transformer body are not obvious in the representation of the external characteristic quantity.
After the existing gas relay generates single light gas action, even if the gas in the relay increases, the light gas relay can not act again to prompt the change of the gas quantity. That is, when there is a developmental fault in the main transformer, if the conventional gas relay does not perform the air bleeding and returning operation in the light gas operation, the light gas will not operate again even if the gas is continuously released. Therefore, the present invention is provided to operate at the initial stage of the development of the fault and trip the respective side breakers of the transformer, so that the buchholz relay can respond differently in stages according to different amounts of gas discharged when the transformer continuously discharges the gas in a short time.
In the operation process of the existing main transformer, the main transformer light gas relay acts due to oil path pipeline problems, structural problems or other conditions causing slow gas release or gas release amount increase, and an alarm signal is sent by mistake. However, in this case, the time interval between the first light gas action and the second light gas action of the light gas relay caused by the slowly increasing gas is long, so that the phenomenon of mistaken alarm signal can be prevented by adjusting the time interval between the first light gas action and the second light gas action of the light gas relay in the present application.
In a certain time after main transformer debugging, overhauling or oil filtering and then inputting, stagnant gas can be gradually released from a transformer, when the released amount of the stagnant gas reaches the threshold value of light gas action and causes corresponding light gas action, the situation is different from the time length of the light gas action caused by decomposed gas generated by faults when the main transformer debugging, overhauling or oil filtering and then inputting into operation, but the logic of the light gas action set in the prior art does not consider the time length of the light gas action when the main transformer debugging, overhauling or oil filtering and then inputting into operation, so that the stagnant gas or the fault decomposed gas which causes the light gas action is difficult to distinguish, and therefore, both the stagnant gas and the fault decomposed gas can cause alarm. The present application also makes corresponding adjustments to this phenomenon.
The application provides a multistage light gas protection device and method, and solves the problems that due to the limitation of the prior art level, operation maintainers cannot find the defect of the internal fault of a main transformer, and the development condition of the internal fault of a main transformer body has no obvious external characteristic quantity reaction, so that the problems are difficult to find in time.
For easy understanding, please refer to fig. 1, which is a schematic structural diagram of an embodiment of a multistage light gas protection device provided in the present application;
the embodiment of this application provides a multistage light gas protection device in the first aspect, includes:
the power supply comprises a state acquisition module, a power supply side signal acquisition module, a state judgment module, a communication module and an output protection module;
the state acquisition module, the power supply side signal acquisition module, the communication module and the output protection module are all connected with the state judgment module;
the state acquisition module is used for acquiring light gas contact state data and transformer operation parameters and transmitting the light gas contact state data and the transformer operation parameters to the state judgment module;
the power supply side signal acquisition module is used for acquiring the operation parameters of the power supply side of the transformer and transmitting the operation parameters to the state judgment module;
the state judgment module respectively judges whether abnormality exists according to the state data, the transformer operation parameters and the operation parameters of the power supply side of the transformer, if so, the communication module gives out a warning prompt to output a protection tripping and locking and closing command module, and the output protection module gives out corresponding protection actions, locking and closing and warning prompt signals.
It should be noted that, as shown in fig. 1, the multistage light gas protection device of the present application includes a state acquisition module, a power source side signal acquisition module, a state judgment module, a communication module, and an output protection module. The state acquisition module can be used for acquiring the 1 st light gas contact state, the 2 nd light gas contact state, the 3 rd light gas contact state, the 4 th light gas contact state, the 5 th light gas contact state, the 6 th light gas contact state, the 7 th light gas contact state, the 8 th light gas contact state, the 9 th light gas contact state, the state of a circuit breaker on the power supply side of the transformer and other electric quantity protection starting signals of the transformer.
The output protection module is provided with a plurality of trip contacts, so that the output protection module can make corresponding trip reaction according to different abnormal conditions.
The power supply side signal acquisition module can be used for acquiring three-phase current of a main transformer power supply side, zero-sequence current of the main transformer power supply side and three-phase voltage of the main transformer power supply side.
The communication module is provided with a plurality of network interfaces and can be used for communication connection between the protection device and external equipment.
The state judgment module carries out comprehensive analysis and judgment through data acquired by the state acquisition module and the power supply side signal acquisition module, and controls the output protection module to start a corresponding output contact according to a finally obtained result so as to realize warning effects such as tripping, locking or alarming.
Further, the communication module comprises a transformer high-voltage side network interface, a transformer medium-voltage side network interface and a transformer low-voltage side network interface, which are all used for receiving corresponding other electric quantity protection action signals and sending corresponding tripping commands and closing locking commands.
It should be noted that the communication module is provided with a transformer high-voltage side intelligent network interface, a transformer medium-voltage side intelligent network interface and a transformer low-voltage side intelligent network interface; and the number of the interfaces is two, and the number of the network interfaces can be increased according to the requirement of the intelligent network. The multistage light gas protection device provided by the application can send corresponding tripping commands and closing locking commands (including reclosing, spare power automatic switching, manual and remote control closing commands) to other equipment connected through an intelligent network through the intelligent network interface at the high-voltage side of the transformer, the intelligent network interface at the medium-voltage side of the transformer or the intelligent network interface at the low-voltage side of the transformer
Further, the state acquisition module comprises a transformer operation parameter acquisition unit connected with the state judgment module and used for acquiring state parameters of a circuit breaker on the power supply side of the transformer and acquiring other electric quantity protection starting signals of the transformer.
It should be noted that the state acquisition module is provided with a transformer operation parameter acquisition unit for acquiring the state of the transformer power supply side circuit breaker and other electric quantity protection starting signals of the transformer.
Further, the state acquisition module includes light gas contact state acquisition unit 1, light gas contact state acquisition unit 2 and light gas contact state acquisition unit 3, be connected with the state judgment module, light gas contact state acquisition unit 1 is used for the collection of the 1 st light gas contact state, the collection of the 2 nd light gas contact state and the collection of the 3 rd light gas contact state, light gas contact state acquisition unit 2 is used for the collection of the 4 th light gas contact state, the collection of the 5 th light gas contact state and the collection of the 6 th light gas contact state, light gas contact state acquisition unit 3 is used for the collection of the 7 th light gas contact state, the collection of the 8 th light gas contact state and the collection of the 9 th light gas contact state.
It should be noted that, as shown in fig. 1, the state acquisition module may be used for the state acquisition of the first to ninth light gas contacts, the state acquisition of the circuit breaker on the power supply side of the transformer, and the acquisition of other electric quantity protection start signals of the transformer. The state acquisition module includes light gas contact state acquisition unit 1, light gas contact state acquisition unit 2 and light gas contact state acquisition unit 3, be connected with the state judgment module, light gas contact state acquisition unit 1 is used for the collection of the 1 st light gas contact state, the collection of the 2 nd light gas contact state and the collection of the 3 rd light gas contact state, light gas contact state acquisition unit 2 is used for the collection of the 4 th light gas contact state, the collection of the 5 th light gas contact state and the collection of the 6 th light gas contact state, light gas contact state acquisition unit 3 is used for the collection of the 7 th light gas contact state, the collection of the 8 th light gas contact state and the collection of the 9 th light gas contact state.
Further, the action time difference between the 1 st light gas contact and the 2 nd light gas contact forms light gas delay 1 protection, the action time difference between the 2 nd light gas contact and the 3 rd light gas contact forms light gas delay 2 protection, the light gas delay 1 protection is designed with 2 sections of settable delay, and the light gas delay 2 protection is designed with 2 sections of settable delay and can be selectively put into tripping or alarming; the action time difference between the 3 rd light gas contact and the 4 th light gas contact forms light gas delay 3 protection, the action time difference between the 4 th light gas contact and the 5 th light gas contact forms light gas delay 4 protection, 2 sections of the light gas delay 3 protection design are settable delay, and 2 sections of the light gas delay 4 protection design are settable delay and can be selectively put into tripping or alarming; the action time difference between the 7 th light gas contact and the 8 th light gas contact forms light gas time delay 5 protection, the action time difference between the 8 th light gas contact and the 9 th light gas contact forms light gas time delay 6 protection, 2 sections of the light gas time delay 5 protection design are settable time delay, and 2 sections of the light gas time delay 6 protection design are settable time delay, and tripping or alarming can be selected.
It should be noted that the transformer operation parameter acquisition unit is further configured to acquire a start signal of the transformer, a first heavy gas contact state of the transformer, and a second heavy gas contact state of the transformer. The action time difference between the 1 st light gas contact and the 2 nd light gas contact forms light gas delay 1 protection, the action time difference between the 2 nd light gas contact and the 3 rd light gas contact forms light gas delay 2 protection, the light gas delay 1 protection is designed with 2 sections of settable delay, the light gas delay 2 protection is designed with 2 sections of settable delay, and tripping or alarming can be selected; the action time difference between the 3 rd light gas contact and the 4 th light gas contact forms light gas delay 3 protection, the action time difference between the 4 th light gas contact and the 5 th light gas contact forms light gas delay 4 protection, 2 sections of the light gas delay 3 protection design are settable delay, and 2 sections of the light gas delay 4 protection design are settable delay and can be selectively put into tripping or alarming; the action time difference between the 7 th light gas contact and the 8 th light gas contact forms light gas time delay 5 protection, the action time difference between the 8 th light gas contact and the 9 th light gas contact forms light gas time delay 6 protection, 2 sections of the light gas time delay 5 protection design are settable time delay, and 2 sections of the light gas time delay 6 protection design are settable time delay, and tripping or alarming can be selected.
Furthermore, the power supply side signal acquisition module comprises a current acquisition unit and a voltage acquisition unit which are both connected with the state judgment module; the current acquisition unit is used for acquiring three-phase current at the power supply side of the transformer and zero-sequence current at the power supply side of the transformer; the voltage acquisition unit is used for acquiring three-phase voltage of the power supply side of the transformer.
It should be noted that the power source side signal acquisition module is provided with a main transformer power source side three-phase current acquisition loop, a main transformer power source side zero-sequence current acquisition loop, and a main transformer power source side three-phase voltage acquisition loop, and can be respectively used for acquiring a transformer power source side three-phase current, a transformer power source side zero-sequence current, and a transformer power source side three-phase voltage.
Further, the output protection module comprises a high-voltage side tripping contact, a transformer medium-voltage side tripping contact and a transformer low-voltage side tripping contact which are mutually connected in parallel, and a gas protection action tripping locking transformer high-voltage side closing contact, a locking transformer medium-voltage side closing contact, a locking transformer low-voltage side closing contact, a locking transformer high-voltage side related closing loop contact, a locking transformer medium-voltage side related closing loop contact and a locking transformer low-voltage side related closing loop contact which are mutually connected in parallel.
It should be noted that the output protection module is provided with a transformer high-voltage side trip contact 1, a transformer high-voltage side trip contact 2, a transformer medium-voltage side trip contact, a transformer low-voltage side trip contact 1, a transformer low-voltage side trip contact 2, a transformer trip latch high-voltage side switch-on contact 1, a transformer trip latch high-voltage side switch-on contact 2, a transformer trip latch medium-voltage side switch-on contact, a transformer trip latch low-voltage side switch-on contact 1, a transformer trip latch low-voltage side switch-on contact 2, a transformer trip latch high-voltage side related loop switch-on contact, a transformer trip latch medium-voltage side related loop switch-on contact, and a transformer trip latch low-voltage side related loop switch-on contact, which are connected in parallel, and when receiving an instruction of the state.
Further, the output protection module further comprises: after a breaker on the power supply side is in a closing state, the light gas is accelerated to carry out 1-6 protective tripping, and after a transformer has an electric protection action and is started, the light gas is accelerated to carry out 1-6 protective tripping; after the transformer autonomously protects the electric quantity, the light gas is accelerated to delay 1 to 6 times to protect tripping.
It should be noted that the output protection module further includes: after a breaker on the power supply side is in a closing state, the light gas is accelerated to carry out 1-6 protective tripping, and after a transformer has an electric protection action and is started, the light gas is accelerated to carry out 1-6 protective tripping; after the transformer autonomously protects the electric quantity, the light gas is accelerated to delay 1 to 6 times to protect tripping.
Further, the output protection module comprises a multi-stage light gas protection tripping contact, a multi-stage light gas protection warning contact and a light gas abnormity warning contact which are connected in parallel.
It should be noted that the output protection module is provided with a light gas protection action trip signal contact 1, a light gas protection action trip signal contact 2, a light gas protection alarm signal contact 1, a light gas protection alarm signal contact 2, and a light gas protection device abnormality alarm signal contact which are connected in parallel, and when receiving an instruction of the state judgment module, the output protection module triggers corresponding contacts to act.
For ease of connection, see fig. 2.
The application also provides a multistage light gas protection method, which is executed by the multistage light gas protection device of the embodiment and comprises the following steps:
100, acquiring light gas contact state data, transformer operation parameters and operation parameters of a transformer power supply side;
200, judging whether the abnormity exists according to the light gas contact state data, the transformer operation parameter and the operation parameter of the transformer power supply side, and if so, giving a warning through the communication interface.
It should be noted that, in the multistage light gas protection method of the present application, by obtaining light gas contact state data, transformer operating parameters, and operating parameters of the transformer power supply side, whether an abnormality exists is determined according to the light gas contact state data, the transformer operating parameters, and the operating parameters of the transformer power supply side, and if so, a warning is given through the communication interface. Wherein, for the light gas component 1, 2 segments of special timing time are set, which are respectively time T1 and time T2: the time T1 is started by the protection action of light gas 1 (namely, the connection of the 1 st light gas contact) and stopped by the protection action of light gas 2 (namely, the connection of the 2 nd light gas contact); the time T2 is started by the protection action of light gas 2 (namely, the connection of the 2 nd light gas contact) and stopped by the protection action of light gas 3 (namely, the connection of the 3 rd light gas contact); after the 1 st light gas protection action, the 1 st light gas contact is connected, on one hand, a light gas protection device (namely, a state judgment module, the same as the following) starts (through a protection output module, the same as the following) a light gas protection alarm signal 1 and a light gas protection alarm signal 2 signal, and simultaneously sends out a first light gas action soft message, wherein the message can be inquired through a man-machine interface and also can be transmitted through a communication interface, and on the other hand, the starting time T1 is timed;
after the 2 nd light gas protection action, the 2 nd light gas contact is connected, on one hand, the light gas protection device starts a light gas protection alarm signal 1 and a light gas protection alarm signal 2, and simultaneously sends out a 2 nd light gas action soft message, wherein the message can be inquired through a man-machine interface and also can be transmitted through a communication interface, and the time T1 is stopped for timing, and on the other hand, the time T2 is started for timing;
after the light gas protection action of the No. 3, the light gas contact of the No. 3 is connected, on one hand, the light gas comprehensive protection device starts the light gas protection alarm signal 1 and the light gas protection alarm signal 2, and simultaneously sends out a light gas action soft message of the No. 3, the message can be inquired through a man-machine interface and can also be transmitted through a communication interface, and the time T2 is stopped for timing.
The light gas time delay 1 protection design has 2 sections of time delays, namely time delay T1-1 and time delay T1-2, the two sections of time delays can be set through a man-machine interface, wherein the setting ranges of the time delay T1-1 are as follows: 0 to 24 hours, wherein 0 to 30 seconds (as setting of 'delay of other protection acceleration sections'), the precision is millisecond, and the grade difference is millisecond; 31 seconds to 24 hours, with the accuracy of seconds and the level difference of seconds; the setting ranges of the delay T1-2 are as follows: 0 to 168 hours, wherein 0 to 30 seconds (as setting of 'delay of other protection acceleration sections'), the precision is millisecond, and the grade difference is millisecond; 31 seconds to 168 hours, precisely seconds, and the grade difference is seconds;
when the time T1 is less than or equal to T1-1 (T1-1 is a settable value), the light gas delay 1 protects the delay T1-1 section to act, and the following tripping outlet contacts are respectively started after the protection act: transformer high voltage side trip contact 1, transformer high voltage side trip contact 2, transformer medium voltage side trip contact, transformer low voltage side trip contact 1, transformer low voltage side trip contact 2, transformer trip lockout high voltage side switch-on contact 1, transformer trip lockout high voltage side switch-on contact 2, transformer trip lockout medium voltage side switch-on contact, transformer trip lockout low voltage side switch-on contact 1, transformer trip lockout low voltage side switch-on contact 2, transformer trip lockout high voltage side related loop switch-on contact, transformer trip lockout medium voltage side related loop switch-on contact, transformer trip lockout low voltage side related loop switch-on contact, light gas protection action trip signal contact 1, light gas protection action trip signal contact 2, light gas protection alarm signal contact 1, A light gas protection alarm signal contact 2; simultaneously, sending tripping, locking and closing commands to other equipment at the high-voltage side through an intelligent network interface at the high-voltage side of the transformer; simultaneously, a tripping command, a locking command and a closing command are sent to other equipment at the medium-voltage side through an intelligent network interface at the medium-voltage side of the transformer; simultaneously, sending tripping, locking and closing commands to other equipment at the low-voltage side through an intelligent network interface at the low-voltage side of the transformer;
wherein:
a transformer high-voltage side tripping contact 1 connected to the transformer high-voltage side tripping coil 1; the transformer high-voltage side tripping contact 2 is connected to the transformer high-voltage side tripping coil 2, and meets the wiring requirement of starting the tripping fault transformer high-voltage side double-tripping loop;
the transformer medium-voltage side tripping contact is connected to the transformer medium-voltage side tripping coil; the wiring requirement of a medium-voltage side trip circuit of the transformer with the tripping fault in starting is met;
a transformer low-voltage side tripping contact 1 connected to a tripping coil of the transformer low-voltage side branch 1; the tripping contact 2 at the low-voltage side of the transformer is connected to the tripping coil of the branch 2 at the low-voltage side of the transformer, so that the requirement of starting the tripping loop with double branches at the low-voltage side of the tripping fault transformer is met;
and a transformer tripping locking high-voltage side closing contact 1 is connected to the transformer high-voltage side closing locking loop to realize light gas delay 1 protection action locking closing. The purpose is that light gas time delay 1 protection action explains transformer inside trouble, prevents that the mistake from closing a floodgate and causing the transformer further to damage. The locking contact is returned only after the light gas comprehensive protection device is reset.
And a transformer tripping locking high-voltage side closing contact 2 is connected to a locking loop of the transformer high-voltage side spare power automatic switching device, so that the light gas delay 1 is used for protecting the action locking spare power automatic switching device to automatically lock the transformer power supply side circuit breaker. The purpose is that light gas time delay 1 protection action explains transformer inside trouble, prevents that the mistake from closing a floodgate and causing the transformer further to damage. The locking contact is returned only after the light gas comprehensive protection device is reset.
The corresponding return circuit combined floodgate contact of transformer tripping operation shutting high-pressure side connects to this transformer high-pressure side and corresponds teletransmission device etc. realizes shutting the function such as the corresponding circuit reclosing of offside transformer substation, combined floodgate, prevents because this transformer substation trouble, contains this protection such as light gas integrated protection after the circuit breaker does not trip, offside transformer protection after the action trip circuit breaker, its combined floodgate back again to the power transmission of trouble transformer, cause the transformer further to damage. The locking contact is returned only after the light gas comprehensive protection device is reset.
The light gas protection action trip signal contact 1 is connected to a fault recording signal contact, and the light gas protection action trip signal contact 2 is connected to a monitoring system to realize remote alarm signal output.
Meanwhile, the light gas comprehensive protection device sends out a 'light gas delay 1 protection delay T1-1 section action soft message', and the message can be inquired through a man-machine interface and also can be transmitted through a communication interface.
When the time T1 is less than or equal to T1-2 (T1-2 is a settable value), the light gas delay 1 protects the action of the T1-2 section, and after the protection action, the tripping outlet and the locking outlet are started, and the alarm signal is the same.
Light gas time delay 2 protection: the light gas time delay 2 protection design has 2 sections of time delays, namely time delay T2-1 and time delay T2-2, the two sections of time delays can be set through a human-computer interface, wherein the setting ranges of the time delay T2-1 are as follows: 0 to 24 hours, wherein 0 to 30 seconds (as setting of 'delay of other protection acceleration sections'), the precision is millisecond, and the grade difference is millisecond; 31 seconds to 24 hours, with the accuracy of seconds and the level difference of seconds; the setting ranges of the delay T2-2 are as follows: 0 to 168 hours, wherein 0 to 30 seconds (as setting of 'delay of other protection acceleration sections'), the precision is millisecond, and the grade difference is millisecond; 31 seconds to 168 hours, precisely seconds, and the grade difference is seconds;
when the time T2 is less than or equal to T2-1 (T2-1 is a settable value), the light gas is delayed for 2 protective time delay T2-1 section to act, and the following tripping outlet contacts are respectively started after the protective action: transformer high voltage side trip contact 1, transformer high voltage side trip contact 2, transformer medium voltage side trip contact, transformer low voltage side trip contact 1, transformer low voltage side trip contact 2, transformer trip lockout high voltage side switch-on contact 1, transformer trip lockout high voltage side switch-on contact 2, transformer trip lockout medium voltage side switch-on contact, transformer trip lockout low voltage side switch-on contact 1, transformer trip lockout low voltage side switch-on contact 2, transformer trip lockout high voltage side related loop switch-on contact, transformer trip lockout medium voltage side related loop switch-on contact, transformer trip lockout low voltage side related loop switch-on contact, light gas protection action trip signal contact 1, light gas protection action trip signal contact 2, light gas protection alarm signal contact 1, A light gas protection alarm signal contact 2; simultaneously, sending tripping, locking and closing commands to other equipment at the high-voltage side through an intelligent network interface at the high-voltage side of the transformer; simultaneously, a tripping command, a locking command and a closing command are sent to other equipment at the medium-voltage side through an intelligent network interface at the medium-voltage side of the transformer; simultaneously, sending tripping, locking and closing commands to other equipment at the low-voltage side through an intelligent network interface at the low-voltage side of the transformer;
wherein:
a transformer high-voltage side tripping contact 1 connected to the transformer high-voltage side tripping coil 1; the transformer high-voltage side tripping contact 2 is connected to the transformer high-voltage side tripping coil 2, and meets the wiring requirement of starting the tripping fault transformer high-voltage side double-tripping loop;
the transformer medium-voltage side tripping contact is connected to the transformer medium-voltage side tripping coil; the wiring requirement of a medium-voltage side trip circuit of the transformer with the tripping fault in starting is met;
a transformer low-voltage side tripping contact 1 connected to a tripping coil of the transformer low-voltage side branch 1; the tripping contact 2 at the low-voltage side of the transformer is connected to the tripping coil of the branch 2 at the low-voltage side of the transformer, so that the requirement of starting the tripping loop with double branches at the low-voltage side of the tripping fault transformer is met;
and a transformer tripping locking high-voltage side closing contact 1 is connected to the transformer high-voltage side closing locking loop to realize light gas delay 1 protection action locking closing. The purpose is that light gas time delay 1 protection action explains transformer inside trouble, prevents that the mistake from closing a floodgate and causing the transformer further to damage. The locking contact is returned only after the light gas protection device is reset.
And a transformer tripping locking high-voltage side closing contact 2 is connected to a locking loop of the transformer high-voltage side spare power automatic switching device, so that the light gas delay 1 is used for protecting the action locking spare power automatic switching device to automatically lock the transformer power supply side circuit breaker. The purpose is that light gas time delay 1 protection action explains transformer inside trouble, prevents that the mistake from closing a floodgate and causing the transformer further to damage. The locking contact is returned only after the light gas protection device is reset.
The corresponding return circuit combined floodgate contact of transformer tripping operation shutting high-pressure side connects to this transformer high-pressure side and corresponds teletransmission device etc. realizes shutting the function such as the corresponding circuit reclosing of offside transformer substation, combined floodgate, prevents because this transformer substation trouble, contains this protection such as light gas integrated protection after the circuit breaker does not trip, offside transformer protection after the action trip circuit breaker, its combined floodgate back again to the power transmission of trouble transformer, cause the transformer further to damage. The locking contact is returned only after the light gas comprehensive protection device is reset.
The light gas protection action trip signal contact 1 is connected to a fault recording signal contact, and the light gas protection action trip signal contact 2 is connected to a monitoring system to realize remote alarm signal output.
Meanwhile, the light gas protection device sends out a 'light gas delay 2 protection delay T2-1 section action soft message', and the message can be inquired through a man-machine interface and also can be transmitted through a communication interface.
And when the time T2 is less than or equal to T2-2 (T2-2 is a settable value), the light gas is delayed for 2 protective delay T2-2 sections to act, and after the protective action, a tripping outlet and a locking outlet are started, an alarm signal and the like are the same.
Note: the design totally has the protection of 4 sections of light gas time delay 1 and 2, and the convenience of use adopts different alarm and tripping schemes according to the difference of the internal structure of the transformer and the difference of the gas output.
The light gas component 2 of the multi-stage rapid light gas comprehensive protection device is also designed with 2 sections of special timing time, which are respectively time T3 and time T4:
time T3: starting by the action of light gas 4 protection (namely the connection of the light gas contact point 4), and stopping by the action of light gas 5 protection (namely the connection of the light gas contact point 5);
time T4: starting by the action of 'light gas 5 protection' (namely the connection of the 5 th light gas contact), and stopping by the action of 'light gas 6 protection' (namely the connection of the 6 th light gas contact);
after the 4 th light gas protection action, the 4 th light gas contact is connected, the light gas comprehensive protection device (namely, an operation and abnormity judgment unit and the same principle is used below) starts (through a starting module and the same principle is used below) a light gas protection alarm signal 1 and a light gas protection alarm signal 2 signal on one hand, and sends out a 4 th light gas action soft message on the other hand, wherein the message can be inquired through a man-machine interface and also can be transmitted through a communication interface, and on the other hand, the starting time T3 is timed;
after the 5 th light gas protection action, the 5 th light gas contact is connected, on one hand, the light gas comprehensive protection device starts a light gas protection alarm signal 1 and a light gas protection alarm signal 2, and simultaneously sends out a '5 th light gas action soft message', wherein the message can be inquired through a man-machine interface and also can be transmitted through a communication interface, and the time T3 is stopped for timing, and on the other hand, the time T4 is started for timing;
after the 6 th light gas protection action, the 6 th light gas contact is connected, on one hand, the light gas comprehensive protection device starts a light gas protection alarm signal 1 and a light gas protection alarm signal 2, and simultaneously sends out a '6 th light gas action soft message', wherein the message can be inquired through a man-machine interface and can also be transmitted through a communication interface, and the time T4 is stopped for timing;
the light gas comprehensive protection device is designed with the following light gas time delay protection:
light gas time delay 3 protection: the light gas delay 3 protection design has 2 sections of delays, namely a delay T3-1 and a delay T3-2, the two sections of delays can be set through a human-computer interface, wherein the setting ranges of the delay T3-1 are as follows: 0 to 24 hours, wherein 0 to 30 seconds (as setting of 'delay of other protection acceleration sections'), the precision is millisecond, and the grade difference is millisecond; 31 seconds to 24 hours, with the accuracy of seconds and the level difference of seconds; the setting ranges of the delay T3-2 are as follows: 0 to 168 hours, wherein 0 to 30 seconds (as setting of 'delay of other protection acceleration sections'), the precision is millisecond, and the grade difference is millisecond; 31 seconds to 168 hours, precisely seconds, and the grade difference is seconds;
when the time T3 is less than or equal to T3-1 (T3-1 is a settable value), the light gas delay 3 protects the T3-1 section action, and the tripping outlet contact and the locking outlet which are respectively started after the protection action, the alarm signal and the like are the same (T2-1):
when the time T3 is less than or equal to T3-2 (T3-2 is a settable value), the light gas delay 3 protects the time delay T3-2 section action, and the tripping outlet contact and the locking outlet which are respectively started after the protection action, the alarm signal and the like are the same (T2-2):
light gas delay 4 protection: the light gas delay 4 protection design has 2 sections of delays, namely a delay T4-1 and a delay T4-2, the two sections of delays can be set through a human-computer interface, wherein the setting ranges of the delay T4-1 are as follows: 0 to 24 hours, wherein 0 to 30 seconds (as setting of 'delay of other protection acceleration sections'), the precision is millisecond, and the grade difference is millisecond; 31 seconds to 24 hours, with the accuracy of seconds and the level difference of seconds; the setting ranges of the delay T4-2 are as follows: 0 to 168 hours, wherein 0 to 30 seconds (as setting of 'delay of other protection acceleration sections'), the precision is millisecond, and the grade difference is millisecond; 31 seconds to 168 hours, precisely seconds, and the grade difference is seconds;
when the time T4 is less than or equal to T4-1 (T4-1 is a settable value), the light gas delay 4 protects the time delay T4-1 section to act, and the tripping outlet contact and the locking outlet which are respectively started after the protection act, and the alarm signal are equal to the above (T2-1):
when the time T4 is less than or equal to T4-2 (T4-2 is a settable value), the light gas delay 4 protects the time delay T4-2 section action, and the tripping outlet contact and the locking outlet which are respectively started after the protection action, the alarm signal and the like are the same (T2-2).
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A multistage light gas protection device, characterized by, includes:
the power supply comprises a state acquisition module, a power supply side signal acquisition module, a state judgment module, a communication module and an output protection module;
the state acquisition module, the power supply side signal acquisition module, the communication module and the output protection module are all connected with the state judgment module;
the state acquisition module is used for acquiring light gas contact state data and transformer operation parameters and transmitting the light gas contact state data and the transformer operation parameters to the state judgment module;
the power supply side signal acquisition module is used for acquiring the operation parameters of the power supply side of the transformer and transmitting the operation parameters to the state judgment module;
the state judgment module judges whether abnormality exists according to the state data, the transformer operation parameters and the operation parameters of the transformer power supply side, if so, the communication module gives out warning prompt to the output protection tripping and locking and closing command, and the output protection module gives out corresponding protection actions, locking and closing and warning prompt signals.
2. The multistage light gas protection device according to claim 1, wherein the communication module comprises a transformer high-voltage side network interface, a transformer medium-voltage side network interface and a transformer low-voltage side network interface, and the communication module is used for receiving corresponding other electric quantity protection action signals and sending corresponding tripping commands and closing locking commands.
3. The multistage light gas protection device according to claim 2, wherein the state collection module comprises a transformer operation parameter collection unit, and is connected to the state judgment module, and is configured to collect state parameters of a circuit breaker on a power supply side of the transformer and collect other electric quantity protection start signals of the transformer.
4. The multistage light gas protection device according to claim 2, wherein the state collection module comprises a light gas contact state collection unit 1, a light gas contact state collection unit 2 and a light gas contact state collection unit 3, and is connected to the state judgment module, the light gas contact state collection unit 1 is used for 1 st light gas contact state collection, 2 nd light gas contact state collection and 3 rd light gas contact state collection, the light gas contact state collection unit 2 is used for 4 th light gas contact state collection, 5 th light gas contact state collection and 6 th light gas contact state collection, and the light gas contact state collection unit 3 is used for 7 th light gas contact state collection, 8 th light gas contact state collection and 9 th light gas contact state collection.
5. The multistage light gas protection device according to claim 4, wherein the action time difference between the 1 st light gas contact and the 2 nd light gas contact constitutes a light gas delay 1 protection, the action time difference between the 2 nd light gas contact and the 3 rd light gas contact constitutes a light gas delay 2 protection, the light gas delay 1 protection is designed with 2 sections of settable delays, and the light gas delay 2 protection is designed with 2 sections of settable delays, so that tripping or alarming can be selectively put into use; the action time difference between the 3 rd light gas contact and the 4 th light gas contact forms light gas delay 3 protection, the action time difference between the 4 th light gas contact and the 5 th light gas contact forms light gas delay 4 protection, 2 sections of the light gas delay 3 protection are designed to be settable delay, and 2 sections of the light gas delay 4 protection are designed to be settable delay, so that tripping or alarming can be selected; the action time difference between the 7 th light gas contact and the 8 th light gas contact forms light gas delay 5 protection, the action time difference between the 8 th light gas contact and the 9 th light gas contact forms light gas delay 6 protection, 2 sections of the light gas delay 5 protection are designed to be settable delay, and 2 sections of the light gas delay 6 protection are designed to be settable delay, so that tripping or alarming can be selected.
6. The multistage light gas protection device according to claim 2, wherein the power supply side signal acquisition module comprises a current acquisition unit and a voltage acquisition unit which are both connected with the state judgment module; the current acquisition unit is used for acquiring three-phase current at the power supply side of the transformer and zero-sequence current at the power supply side of the transformer; the voltage acquisition unit is used for acquiring the three-phase voltage of the power supply side of the transformer.
7. The multistage light gas protection device according to claim 2, wherein the output protection module comprises a high-pressure side trip contact, a transformer medium-pressure side trip contact and a transformer low-pressure side trip contact which are connected in parallel, and a gas protection action trip blocking the transformer high-pressure side closing contact, the blocking transformer medium-pressure side closing contact, the blocking transformer low-pressure side closing contact, the blocking transformer high-pressure side related closing loop contact, the blocking transformer medium-pressure side related closing loop contact and the blocking transformer low-pressure side related closing loop contact which are connected in parallel.
8. The multistage light gas protection device according to any one of claims 3 to 7, wherein the output protection module further comprises: after a breaker on the power supply side is in a closing state, the light gas is accelerated to carry out 1-6 protective tripping, and after a transformer has an electric protection action and is started, the light gas is accelerated to carry out 1-6 protective tripping; after the transformer autonomously protects the electric quantity, the light gas is accelerated to delay 1 to 6 times to protect tripping.
9. The multi-stage light gas protection device according to claim 2, wherein the output protection module comprises a multi-stage light gas protection trip contact, a multi-stage light gas protection alarm contact and a light gas abnormality alarm contact which are connected in parallel with each other.
10. A multistage light gas protection method, characterized in that it is performed by the multistage light gas protection device of claims 1-9, comprising the steps of:
acquiring light gas contact state data, transformer operation parameters and operation parameters of a transformer power supply side;
and judging whether the abnormity exists according to the light gas contact state data, the transformer operation parameters and the operation parameters of the transformer power supply side, and if so, giving a warning through a communication interface.
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