CN111551809A - Synchronous whole-group automatic testing method and system for secondary system of intelligent substation - Google Patents
Synchronous whole-group automatic testing method and system for secondary system of intelligent substation Download PDFInfo
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Abstract
The invention discloses a synchronous whole-group automatic testing method and system for a secondary system of an intelligent substation, wherein the method comprises the following steps: simulating the preset operation condition parameters according to a pre-constructed simulation model of the tested transformer substation; synchronously inputting the simulation result into the tested transformer substation; and comparing the action logic returned by the secondary system of the tested transformer substation with the pre-stored correct action logic to finish the panoramic test of the secondary system of the transformer substation. The method can establish a test relation between the simulation platform and the transformer substation site, synchronously input the simulation result of the simulation platform into the transformer substation to be tested, and acquire the action logic feedback of the transformer substation, thereby realizing the remote automatic regular inspection and the online checking of safety measures of the secondary system of the transformer substation.
Description
Technical Field
The invention relates to the technical field of transformer substation safety, in particular to a synchronous whole-group automatic testing method and system for an intelligent transformer substation secondary system.
Background
With the development of the electric power industry in China, the application of new technology, an intelligent substation serving as one of important components of an intelligent power grid, becomes a development trend of future substations. At present, the test of a merging unit, an intelligent terminal and a protection device in a digital transformer substation is completely separated, the test process is complicated, and the test of a single device is mainly aimed at, so that the test of the merging unit, the relay protection and the whole joint debugging of the intelligent terminal cannot be performed. Meanwhile, due to the fact that time intervals exist in the debugging of the secondary equipment, the single-equipment safety testing method is adopted, the production time of the test is obviously increased, the field test adjusting efficiency of the intelligent substation is further reduced, and the direct economy and indirect economy of the intelligent substation are greatly increased.
Disclosure of Invention
In view of the above defects in the prior art, the present invention aims to provide a synchronous whole-group automatic testing method and system for an intelligent substation secondary system, which are used for improving the working efficiency of joint debugging of substation field secondary equipment and reducing the operation and maintenance cost of a substation.
One of the purposes of the invention is realized by the technical scheme, and the synchronous whole-group automatic testing method for the secondary system of the intelligent substation comprises the following steps:
simulating the preset operation condition parameters according to a pre-constructed simulation model of the tested transformer substation;
synchronously inputting the obtained simulation result into the tested transformer substation to obtain action logic returned by a secondary system of the tested transformer substation;
and comparing the action logic returned by the secondary system of the tested transformer substation with the action logic prestored corresponding to the simulation model to finish the panoramic test of the secondary system of the transformer substation.
Optionally, the simulating the preset operation condition parameters according to the pre-established simulation model of the measured substation includes:
and judging the correctness of the operation behavior corresponding to the operation condition parameters according to the time sequence relation of the simulation model.
Optionally, before the simulation result is synchronously input into the tested substation, the method further includes:
and carrying out synchronous time synchronization on the data transmission equipment in the test loop.
Optionally, the step of synchronously inputting the obtained simulation result into the tested substation includes:
and after the preset time is reached, synchronously inputting the simulation result into the tested substation.
Optionally, comparing the action logic returned by the secondary system of the tested substation with the action logic prestored in the corresponding simulation model to complete the panoramic test of the secondary system of the substation, including:
judging whether the time sequence relation corresponding to the action logic returned by the secondary system of the tested substation is abnormal or not;
and under the condition of abnormity, positioning a fault link according to the time sequence relation.
The second purpose of the invention is realized by the technical scheme, and the synchronous whole-group automatic testing system for the secondary system of the intelligent substation comprises the following components:
the simulation platform is used for simulating the preset operation condition parameters according to a pre-constructed simulation model of the tested transformer substation;
the acquisition simulator is electrically connected between the simulation platform and the tested substation and is used for synchronously inputting the simulation result obtained by the simulation platform into the tested substation;
and the switch simulator is electrically connected between the simulation platform and the tested substation so as to transmit the action logic returned by the secondary system of the tested substation to the simulation platform, so that the simulation platform compares the action logic returned by the secondary system of the tested substation with the action logic prestored corresponding to the simulation model to complete the panoramic test of the secondary system of the substation.
Optionally, the simulation platform is further configured to determine, according to the time sequence relationship of the simulation model, correctness of an operation behavior corresponding to a preset operation condition parameter.
Optionally, the method further includes:
and the control host is electrically connected with the simulation platform, the acquisition simulator and the switch simulator respectively and is used for synchronously timing the simulation platform, the acquisition simulator and the switch simulator in the test loop.
Optionally, the acquisition simulator is specifically configured to synchronously input the simulation result to the tested substation after the preset time is reached.
Optionally, the simulation platform is specifically configured to:
judging whether the time sequence relation corresponding to the action logic returned by the secondary system of the tested substation is abnormal or not;
and under the condition of abnormity, positioning a fault link according to the time sequence relation.
Due to the adoption of the technical scheme, the invention has the following advantages: the method can establish a test relation between the simulation platform and the transformer substation site, synchronously input the simulation result of the simulation platform into the transformer substation to be tested, and acquire the action logic feedback of the transformer substation, thereby realizing the remote automatic regular inspection and the online checking of safety measures of the secondary system of the transformer substation.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
The drawings of the invention are illustrated as follows:
FIG. 1 is a flow chart of a method according to a first embodiment of the present invention;
FIG. 2 is a system diagram illustrating a second embodiment of the present invention;
fig. 3 is a general flowchart of a second embodiment of the present invention.
Detailed Description
The invention is further illustrated by the following figures and examples.
Example one
In order to improve the working efficiency of the on-site secondary equipment joint debugging of the intelligent substation and reduce the operation and maintenance cost of the intelligent substation, the integrated system level test is carried out on the secondary system side merging unit, the intelligent terminal and the protection device of the substation. At present, the test of the digital transformer substation develops towards the direction of high efficiency and automation. At home and abroad, various tester manufacturers construct a digital substation secondary equipment test system, and research progress is uneven. The digital transformer substation basically adopts a single device for testing, a merging unit tester is used for testing the merging unit, an intelligent terminal tester is used for testing the intelligent terminal, and a digital relay protection tester is used for testing the digital protection device. The test of the merging unit, the intelligent terminal and the protection device is completely separated, the test process is relatively complicated, and each test is a local test. The comprehensive debugging of the merging unit, the intelligent terminal and the protection device lacks of sufficient consideration for safety measures of the whole station, and meanwhile, the monomer debugging and the whole joint debugging cannot be fully integrated.
Based on the first embodiment of the present invention, a method for automatically testing a whole synchronous group of secondary systems of an intelligent substation is provided, as shown in fig. 1, the method includes:
simulating the preset operation condition parameters according to a pre-constructed simulation model of the tested transformer substation;
synchronously inputting the obtained simulation result into the tested transformer substation to obtain action logic returned by a secondary system of the tested transformer substation;
and comparing the action logic returned by the secondary system of the tested transformer substation with the action logic prestored corresponding to the simulation model to finish the panoramic test of the secondary system of the transformer substation.
Specifically, in this embodiment, a simulation test relationship is firstly established between a simulation platform and an intelligent substation, specifically, corresponding equipment and line parameters can be configured according to a primary side wiring diagram of a test transformer, so that a simulation software scene is established, platform simulation is performed, and a simulation result of the simulation platform is synchronously input into the intelligent substation to be tested, thereby realizing remote automatic regular inspection and online safety measure check of a secondary system of the intelligent substation.
More specifically, in this embodiment, a time domain simulation mode may be used instead of actual primary system information input, and in this embodiment, simulation is performed by establishing a model with the generator set and the primary side line of the intelligent substation as an object, setting an operation condition parameter by an operator, and switching a simulation mode.
The method can establish a test relation between the simulation platform and the intelligent substation on site, synchronously input the simulation result of the simulation platform into the intelligent substation to be tested, and acquire the action logic feedback of the intelligent substation, thereby realizing remote automatic regular inspection and safety measure on-line check of the secondary system of the intelligent substation.
Optionally, the simulating the preset operation condition parameters according to the pre-established simulation model of the measured substation includes:
and judging the correctness of the operation behavior corresponding to the operation condition parameters according to the time sequence relation of the simulation model.
In this embodiment, the correctness of the input preset operation condition parameters needs to be determined, and specifically, since the actions of the protection device of the intelligent substation have a fixed logic sequence and a fixed time sequence, in this embodiment, the correctness of the operation behavior corresponding to the preset operation condition parameters can be determined through a simulation time sequence relationship.
Optionally, before the simulation result is synchronously input into the tested substation, the method further includes:
and carrying out synchronous time synchronization on the data transmission equipment in the test loop.
Specifically, in this embodiment, the present invention innovatively proposes to perform unified time synchronization on data transmission devices in the entire test loop, for example, in an optional implementation manner, the simulation platform transmits and receives data through the wireless control host, the wireless control host transmits simulation platform data to the acquisition simulator and receives intelligent substation action data returned by the switch simulator, in this data loop, when time synchronization needs to be performed on the simulation platform, the wireless control host, the acquisition simulator and the switch simulator, in actual operation, one platform may be used as a reference, for example, the wireless control host is used as a reference, and the wireless control host performs unified time synchronization on clocks in each simulator and clocks in the host, so that the simulation platform, the acquisition simulator and the switch simulator of the substation are in a time synchronization state, and it is ensured that test data are consistent with a field operation state, therefore, remote automatic regular inspection and safety measure on-line check of the secondary system of the intelligent substation are facilitated.
Optionally, the step of synchronously inputting the obtained simulation result into the tested substation includes:
and after the preset time is reached, synchronously inputting the simulation result into the tested substation.
Specifically, on the basis of the unified time synchronization in the foregoing embodiment, in this embodiment, when the local clock reaches the set time of the platform, the test data starts to be injected into the substation to be tested in real time, and after the test is finished, the relevant action signal parameters and status signal parameters are correspondingly collected, so that the test task is completed.
Optionally, comparing the action logic returned by the secondary system of the tested substation with the action logic prestored in the corresponding simulation model to complete the panoramic test of the secondary system of the substation, including:
judging whether the time sequence relation corresponding to the action logic returned by the secondary system of the tested substation is abnormal or not;
and under the condition of abnormity, positioning a fault link according to the time sequence relation.
In this embodiment, in order to further clarify the fault cause and occurrence position of the test result and further improve the efficiency of removing the fault on the test site, the test result needs to be checked for online safety measures based on the behavior logic relationship of each link to give a fault location result, and specifically, the link of the protection device in the intelligent substation can be subdivided into a protection logic link, a protection switching link and a protection command setting link. According to the method, based on the principle that abnormal actions of any link can cause misoperation of the circuit breaker, and the error link only affects subsequent links according to the time sequence relation and is irrelevant to the preorder link, in the embodiment, whether the time sequence relation corresponding to action logic returned by the protection device of the secondary system of the substation to be tested is abnormal or not is judged, and the fault link is positioned according to the time sequence relation under the condition of the abnormal situation, so that the fault link can be accurately positioned, and the online checking of safety measures for protecting the whole group of linkage in single interval class is completed.
In conclusion, the method has strong feasibility and effectiveness for the power transformation safety technology research, the secondary devices such as the merging unit, the intelligent terminal and the protection device of the secondary system of the intelligent substation are uniformly regarded as tested objects, and the panoramic test covering three layers of secondary side single device, linkage device and overall linkage of the secondary system can be realized through the method.
Example two
A second embodiment of the present invention provides a synchronous whole-group automatic test system for a secondary system of an intelligent substation, as shown in fig. 2, the system includes:
the simulation platform is used for simulating the preset operation condition parameters according to a pre-constructed simulation model of the tested transformer substation;
the acquisition simulator is electrically connected between the simulation platform and the tested substation and is used for synchronously inputting the simulation result obtained by the simulation platform into the tested substation;
and the switch simulator is electrically connected between the simulation platform and the tested substation so as to transmit the action logic returned by the secondary system of the tested substation to the simulation platform, so that the simulation platform compares the action logic returned by the secondary system of the tested substation with the action logic prestored corresponding to the simulation model to complete the panoramic test of the secondary system of the substation.
Specifically, in the embodiment, the system comprises a transformer substation simulation software platform, an acquisition simulator and a switch simulator, wherein the simulation software platform can provide behaviors such as task configuration information input and secondary behavior correctness judgment; the acquisition simulator can simulate the output characteristics of the mutual inductor, isolate the primary side and the secondary side of the transformer substation and drive the system to respond; the switch simulator receives the signal of the intelligent terminal and converts the analog signal into a data signal form to feed back to the simulation platform.
Firstly, establishing a simulation test relation between a simulation platform and an intelligent substation on site, specifically configuring corresponding equipment and line parameters according to a primary side wiring diagram of a test transformer, completing construction of a simulation software scene, then performing platform simulation, synchronously inputting a simulation result of the simulation platform into the tested substation by an acquisition simulator, and comparing the action logic returned by the secondary system of the tested substation through a switch simulator with the prestored correct action logic by the simulation platform, thereby realizing remote automatic fixed detection and safety measure on-line check of the secondary system of the intelligent substation.
According to the system, the full-scene test system for the detection of the secondary system of the intelligent substation is established, so that the online detection of the side function operation of the secondary system is realized, the online check of the secondary side safety measure is performed on the basis of the test result, the quality and the efficiency of the intelligent substation on site on the fault action output are improved, and the panoramic intelligent operation of the intelligent substation is realized.
Optionally, the simulation platform is further configured to determine, according to the time sequence relationship of the simulation model, correctness of an operation behavior corresponding to a preset operation condition parameter.
In this embodiment, the correctness of the input preset operation condition parameters needs to be determined, and specifically, since the actions of the protection device of the substation have a fixed logic sequence and a fixed time sequence, in this embodiment, the simulation platform can determine the correctness of the operation behavior corresponding to the preset operation condition parameters through the simulation time sequence relationship.
Optionally, the method further includes:
and the control host is electrically connected with the simulation platform, the acquisition simulator and the switch simulator respectively and is used for synchronously timing the simulation platform, the acquisition simulator and the switch simulator in the test loop.
Specifically, in this embodiment, the system includes a substation simulation software platform, a wireless control host, an acquisition simulator, and a switch simulator. The simulation software platform can provide behaviors such as task configuration information input, secondary behavior correctness judgment and the like; the acquisition simulator can simulate the output characteristics of the mutual inductor, isolate the primary side and the secondary side of the transformer substation and drive the system to respond; the switch simulator receives the signal of the intelligent terminal and converts the analog signal into a data signal form to feed back to the simulation platform; the wireless control host ensures that the simulation platform and the simulator are under a unified reference clock, and ensures that the simulation data is consistent with the field operation state.
On the basis of the foregoing embodiment, in this embodiment, the panoramic test system for the secondary system of the intelligent substation includes: the system comprises a transformer substation simulation software platform, a wireless control host, an acquisition simulator and a switch simulator.
In this embodiment, the substation simulation platform forms a primary side wiring diagram from the internal connection relationship of the substation, and provides a modeling interface for the substation or a power grid element. The fault simulation of any element node can be realized by changing the parameters of elements such as a PI type line, a distributed parameter line, a three-phase transformer and the like. The simulation platform is based on electromagnetic transient calculation, and simulation results are transmitted to the acquisition simulator by the wireless control host. And the simulation platform judges the correctness of the operation behavior of the secondary system according to the time sequence relation for the time information of the input data and the output result.
The acquisition simulator has the characteristic of a mutual inductor, so that the primary side and the secondary side of the transformer substation can be isolated. And the output characteristic of the mutual inductor is simulated, and experimental data is input into the merging unit as a driving signal to complete the driving response of the secondary system.
The switch simulator receives the action signal and the state signal of the intelligent terminal and is connected with a switch loop in an actual primary system in parallel. And converting the analog signals in the switch simulator into digital signals, giving a time stamp, and transmitting the digital signals to the simulation platform to participate in judging the secondary behavior of the test system.
The wireless control host machine is mainly used for carrying out unified time synchronization on the clocks in the simulators and the clocks in the host machine, so that the test data are ensured to be consistent with the field operation state under the condition that the simulation platform of the transformer substation, the acquisition simulator and the switch simulator are in time synchronization; meanwhile, the wireless communication technology is used as a medium for information data interaction between simulation software and each collector, and the wireless control host also becomes a communication control center.
Optionally, the acquisition simulator is specifically configured to synchronously input the simulation result to the tested substation after the preset time is reached.
Optionally, the simulation platform is specifically configured to:
judging whether the time sequence relation corresponding to the action logic returned by the secondary system of the tested substation is abnormal or not;
and under the condition of abnormity, positioning a fault link according to the time sequence relation.
Specifically, in this embodiment, in order to further clarify the cause and the occurrence position of the fault of the test result and further improve the efficiency of removing the fault on the test site, on-line safety measures are also checked for the test result based on the behavior logic relationship of each link, and a fault positioning result is given.
Because the internal clock of the simulator is kept synchronous with the main clock in the wireless control host, the test data input by the simulator and the state data of the switch simulator have a mutual corresponding relation under a unified time scale axis. On the basis of the time scale corresponding relation, the intelligent substation fault state-protection action-switch changed safety measure on-line checking can be completed. Taking single-interval protection of the whole group of linkage as an example, the link of the protection device can be subdivided into a protection logic link, a protection switching link and a protection command setting link. All links are strictly in accordance with the sequential time sequence relation, wherein abnormal actions of any link can cause misoperation of the circuit breaker, and the error link only affects the subsequent links according to the sequential time sequence relation and is irrelevant to the preceding link.
Based on this, in this embodiment, after receiving the action logic data returned by the switch simulator, it is first determined whether the time sequence relationship corresponding to the action logic returned by the secondary system protection device of the tested substation is abnormal;
and under the condition of abnormity, positioning a fault link according to the time sequence relation so as to complete the panoramic test of the secondary system of the transformer substation.
Based on the same clock distribution state of the secondary system of the intelligent substation, after a fault state occurs, a fault link can be accurately positioned, and the online checking of safety measures for single-interval protection and whole-group linkage is completed.
In summary, as shown in fig. 3, the system of the present invention first adopts a time domain simulation mode instead of the actual primary system information input, and the simulation mainly includes establishing a model with the primary side line of the power generating set and the transformer substation as the object, setting the operating condition parameters and switching the simulation mode by the operator, and transmitting the corresponding output results to each acquisition simulator; secondly, the wireless control host adjusts the clocks of the simulators by adopting time synchronization adjustment to realize the clock synchronization of the whole system; and finally, synchronously injecting test data into each acquisition simulator for adjustment, finally outputting the secondary system to be expressed as a driving switch action, and simultaneously realizing online checking of the secondary system safety measure action through the behavior logic relationship between the intelligent terminal and the physical switch.
For transformer substation operators, the test preparation work can be completed by the following three steps, namely, the construction of a simulation software scene is completed according to the configuration of corresponding equipment and line parameters of a primary side wiring diagram of a test transformer; secondly, the operator determines the simulation mode performed by the simulation platform and transmits simulation output data parameters to each simulator; thirdly, the clocks of the simulators are adjusted by the wireless control host to keep the clocks synchronous with the simulators, so that the real-time synchronization of the test data and the simulation data is realized, and the system is simple and convenient to operate.
The system has strong feasibility and effectiveness for the research of the power transformation safety technology, and can realize panoramic test covering three levels of secondary side single equipment, linkage equipment and overall linkage of a secondary system by uniformly regarding secondary equipment such as a merging unit, an intelligent terminal and a protection device of a secondary system of a transformer substation as a test object.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered thereby.
Claims (10)
1. A synchronous whole-group automatic testing method for a secondary system of an intelligent substation is characterized by comprising the following steps:
simulating the preset operation condition parameters according to a pre-constructed simulation model of the tested transformer substation;
synchronously inputting the obtained simulation result into the tested transformer substation to obtain action logic returned by a secondary system of the tested transformer substation;
and comparing the action logic returned by the secondary system of the tested transformer substation with the action logic prestored corresponding to the simulation model to finish the panoramic test of the secondary system of the transformer substation.
2. The method of claim 1, wherein simulating the preset operating condition parameters according to a pre-constructed simulation model of the substation to be tested comprises:
and judging the correctness of the operation behavior corresponding to the operation condition parameters according to the time sequence relation of the simulation model.
3. The method of claim 1, before synchronously inputting the simulation result into the substation under test, further comprising:
and carrying out synchronous time synchronization on the data transmission equipment in the test loop.
4. The method of claim 3, wherein the step of synchronously inputting the obtained simulation result into the substation to be tested comprises:
and after the preset time is reached, synchronously inputting the simulation result into the tested substation.
5. The method of claim 3 or 4, wherein comparing the action logic returned by the secondary system of the tested substation with the action logic prestored corresponding to the simulation model to complete the panoramic test of the secondary system of the substation comprises:
judging whether the time sequence relation corresponding to the action logic returned by the secondary system of the tested substation is abnormal or not;
and under the condition of abnormity, positioning a fault link according to the time sequence relation.
6. The utility model provides a synchronous whole group automatic test system of intelligent substation secondary system which characterized in that includes:
the simulation platform is used for simulating the preset operation condition parameters according to a pre-constructed simulation model of the tested transformer substation;
the acquisition simulator is electrically connected between the simulation platform and the tested substation and is used for synchronously inputting the simulation result obtained by the simulation platform into the tested substation;
and the switch simulator is electrically connected between the simulation platform and the tested substation so as to transmit the action logic returned by the secondary system of the tested substation to the simulation platform, so that the simulation platform compares the action logic returned by the secondary system of the tested substation with the action logic prestored corresponding to the simulation model to complete the panoramic test of the secondary system of the substation.
7. The system of claim 6, wherein the simulation platform is further configured to determine the correctness of the operation behavior corresponding to the preset operation condition parameter according to the timing relationship of the simulation model.
8. The system of claim 6, further comprising:
and the control host is electrically connected with the simulation platform, the acquisition simulator and the switch simulator respectively and is used for synchronously timing the simulation platform, the acquisition simulator and the switch simulator in the test loop.
9. The system of claim 8, wherein the collection simulator is configured to synchronously input the simulation result into the substation under test after a preset time is reached.
10. The system of claim 8 or 9, wherein the simulation platform is specifically configured to:
judging whether the time sequence relation corresponding to the action logic returned by the secondary system of the tested substation is abnormal or not;
and under the condition of abnormity, positioning a fault link according to the time sequence relation.
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| CN113360381A (en) * | 2021-06-07 | 2021-09-07 | 中国工商银行股份有限公司 | Case proofreading system and method in automatic test of platform under host |
| CN113552857A (en) * | 2021-07-20 | 2021-10-26 | 中国电力科学研究院有限公司 | Automatic excitation detection method and system in autonomous controllable intelligent substation |
| CN114170878A (en) * | 2021-11-12 | 2022-03-11 | 安徽继远软件有限公司 | Equipment maintenance test system and method for novel intelligent substation |
| CN115330887A (en) * | 2022-10-18 | 2022-11-11 | 广州远望电力工程设计股份有限公司 | Automatic test system and test method for intelligent substation protection device |
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