CN211478507U - Feeder automation function testing device - Google Patents

Abstract

The utility model provides a feeder automation function test device, comprising: a main controller, a real-time digital emulator and a plurality of power distribution terminal testers, wherein: the main controller is connected with the real-time digital emulator, and is connected through the real-time digital emulator The wireless network is connected with a plurality of distribution terminal testers; each distribution terminal tester is connected with the tested distribution automation terminal, and the main controller is used to automatically configure the regional distribution network grid structure and its operation according to the tested feeder A real-time digital simulation model of the distribution network is built in a way, and the real-time digital simulator is used to perform real-time simulation according to the real-time digital simulation model of the distribution network, and generate waveform files of different network nodes of the same section. The feeder automation function test device provided by the utility model can test the distribution automation terminal in a non-lab environment, and has positive significance for the promotion of the feeder automation function test.

Description

Feeder automation function test device

technical field

The utility model relates to the field of electric power industry, belongs to the technical field of feeder automation function testing, and particularly relates to a feeder automation function testing device.

Background technique

Feeder automation is an important part of distribution automation system, which mainly realizes the location, isolation and recovery of distribution network faults. Feeder automation is mainly divided into centralized, local recloser, intelligent distributed and other types. Due to the complex structure and various operation modes of the distribution network grid, the logic and parameters of different feeder automation are different. In order to ensure that feeder automation can effectively deal with distribution network faults and shorten the recovery time of distribution network faults, it is necessary to perform functional tests on feeder automation before it is put into operation.

In the prior art, it is unrealistic to send each feeder automation equipment to a laboratory for functional testing. In view of the large-scale distribution network, the large number of lines, and the remote location of some lines, this method is unrealistic. Therefore, a portable feeder automatic function test system is designed to be used in cities, county companies or engineering sites. Testing the distribution automation terminal in the laboratory environment has positive significance for verifying its feeder automation function logic and improving its fault handling capability.

Utility model content

The feeder automation function test device provided by the utility model can test the distribution automation terminal in a non-lab environment, and has positive significance for the promotion of the feeder automation function test.

In order to achieve the above purpose, a feeder automation function test device is provided, including: a main controller, a real-time digital emulator, and a plurality of power distribution terminal testers, wherein:

The main controller is connected with the real-time digital simulator, and is connected with a plurality of power distribution terminal testers through a wireless network;

Each distribution terminal tester is connected to the distribution automation terminal under test,

The main controller is used to build a real-time digital simulation model of the distribution network according to the grid structure of the distribution network in the region where the tested feeder is automatically configured and its operation mode, and the real-time digital simulator is used to build a real-time digital simulation model of the distribution network according to the real-time digital simulation model of the distribution network. Perform real-time simulation and generate waveform files of different network nodes in the same section.

In one embodiment, the main controller is connected to multiple power distribution terminal testers through a 4G network or a 5G network.

In one embodiment, the power distribution terminal tester is provided with a GPS time synchronization module.

In one embodiment, the power distribution terminal tester is provided with a Beidou time synchronization module.

In one embodiment, the real-time digital simulator is a portable RTDS.

In one embodiment, the real-time digital simulation model of the distribution network includes: a two-phase short-circuit fault model, a three-phase short-circuit fault model, a metallic single-phase grounding fault model, a low-resistance grounding fault model, a high-resistance grounding fault model, and an arc grounding fault model. failure model.

In one embodiment, the waveform files include: a two-phase short-circuit fault model waveform file, a three-phase short-circuit fault model waveform file, a metallic single-phase grounding fault model waveform file, a low-resistance grounding fault model waveform file, and a high-resistance grounding fault model. Waveform files as well as arc ground fault model waveform files.

In one embodiment, the main controller is further configured to control the distribution terminal tester to perform analog quantity accuracy verification, remote signal quantity verification, control quantity verification and alarm signal verification on the tested distribution automation terminal. .

In one embodiment, the main controller is further configured to download the waveform file to the corresponding power distribution terminal tester, issue a synchronous trigger instruction, and control the power distribution terminal tester to synchronously play back all the data at the trigger appointment time. wave file.

In one embodiment, the power distribution terminal tester includes: 4 groups of AC voltage output ports, 4 groups of AC current output ports, 8 switch input terminals, 4 switch output terminals, and at least one set of network interfaces.

As can be seen from the above description, the feeder automation function test device provided by the present invention includes a main controller, a real-time digital emulator and a plurality of distribution terminal testers. The distribution terminal testers are connected to the main controller; the main controller is connected to the main controller through a wireless network. Network with the distribution terminal tester; each distribution terminal tester is connected to a tested distribution automation terminal. The device provided by the utility model can perform synchronous testing on multiple power distribution automation terminals in non-laboratory environments such as city and county power supply companies and engineering sites, and can synchronously perform data collection, remote signaling functions, and control on multiple power distribution automation terminals. Basic functions, etc. At the same time, the utility model can perform real-time digital modeling according to the distribution network grid structure and its operation mode, and synchronously invert the fault waveforms of different lines and subsections of the same fault section, so as to verify the overall fault processing logic of the feeder automation.

Compared with the prior art, the feeder automation function test device provided by the utility model has the beneficial effects of realizing synchronous waveform inversion for multiple distribution automation terminals, simulating the real fault environment of the distribution network to the maximum extent, and improving the feeder automation. The ability of logic verification will have a good application prospect for improving the effect of automatic fault handling of feeder and its practical operation. At the same time, the utility model can test the distribution automation terminal in a non-lab environment, and has positive significance for the promotion of the feeder automation function test.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts.

1 is a schematic structural diagram of a feeder automated function testing device in an embodiment of the present invention;

FIG. 2 is a schematic diagram of test steps performed by a feeder automatic function test device according to a specific application example of the present invention.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In view of the prior art, it is impossible to perform synchronous waveform inversion for multiple distribution automation terminals, and it is impossible to accurately and maximally simulate the real fault environment of the distribution network, so as to improve the feeder automation logic verification capability. At the same time, the distribution automation terminal must be tested in a non-lab environment. The embodiment of the present utility model provides a specific implementation manner of a feeder automatic function test device. The feeder automatic function test device specifically includes: a main controller, a real-time digital simulator, and a plurality of power distribution terminal testers, wherein:

The main controller is connected with the real-time digital simulator, and is connected with a plurality of power distribution terminal testers through a wireless network;

Each distribution terminal tester is connected to the distribution automation terminal under test,

It can be understood that feeder automation uses automation devices or systems to monitor the operation of the distribution network, detect distribution network faults in time, and locate, isolate and restore power to non-faulty areas. The main controller is used to build a real-time digital simulation model of the distribution network according to the grid structure of the distribution network in the region where the tested feeder is automatically configured and its operation mode, and the real-time digital simulator is used to build a real-time digital simulation model of the distribution network according to the real-time digital simulation model of the distribution network. Perform real-time simulation and generate waveform files of different network nodes in the same section. Preferably, the real time digital simulator is a portable RTDS (real time digital simulation system). It can be understood that real-time digital simulation technology not only has the characteristics of digital simulation, but more importantly, the adoption of parallel processing technology and the design of special hardware ensure the real-time performance of RTDS operation and the ability of closed-loop testing. The real-time simulation operation of a large-scale power system is completed on the step size. The feeder automation function test device provided by the above embodiments can perform synchronous testing of multiple power distribution automation terminals in remote areas without laboratory conditions. Distribution automation terminal refers to the general term for various remote monitoring and control units installed in the distribution network, mainly including feeder terminals, station terminals, distribution transformer terminals, etc.

As can be seen from the above description, the feeder automation function test device provided by the present invention includes a main controller, a real-time digital emulator and a plurality of distribution terminal testers. The distribution terminal testers are connected to the main controller; the main controller is connected to the main controller through a wireless network. Network with the distribution terminal tester; each distribution terminal tester is connected to a tested distribution automation terminal. The device provided by the utility model can perform synchronous testing on multiple power distribution automation terminals in non-laboratory environments such as city and county power supply companies and engineering sites, and can synchronously perform data collection, remote signaling functions, and control on multiple power distribution automation terminals. Basic functions, etc. At the same time, the utility model can perform real-time digital modeling according to the distribution network grid structure and its operation mode, and synchronously invert the fault waveforms of different lines and subsections of the same fault section, so as to verify the overall fault processing logic of the feeder automation.

In one embodiment, the main controller is connected to multiple power distribution terminal testers through a 4G network or a 5G network.

Specifically, both the main controller and the power distribution terminal tester are equipped with 4G communication modules or 5G communication modules, so as to form a network with multiple power distribution terminal testers to complete the test tasks and issue synchronous trigger commands. The main controller controls a number of distribution terminal testers to perform routine test items such as analog calibration, switch-in/out-out verification, and protection alarm signal verification; according to actual test requirements, the main controller can implement routine testing of different distribution terminal testers. Time-sharing, simultaneous or sequential testing of test items.

In one embodiment, the power distribution terminal tester is provided with a GPS time synchronization module.

In one embodiment, the power distribution terminal tester is provided with a Beidou time synchronization module.

It can be understood that each power distribution terminal tester is equipped with a GPS/Beidou time synchronization module to complete the time synchronization between multiple power distribution terminal testers, thereby realizing synchronous testing of multiple power distribution automation terminals under test.

The GPS time synchronization module uses GPS signal as the time source. At the same time, it can select Beidou, CDMA, B code and other time source servers. It embeds the NTP/SNTP protocol to synchronize all computers, controllers and other equipment in the network to realize network timing.

In one embodiment, the real-time digital simulator is a portable RTDS.

In one embodiment, the real-time digital simulation model of the distribution network includes: a two-phase short-circuit fault model, a three-phase short-circuit fault model, a metallic single-phase grounding fault model, a low-resistance grounding fault model, a high-resistance grounding fault model, and an arc grounding fault model failure model.

The distribution terminal tester and the main controller are connected through the network; according to the automatic configuration of the feeder, the regional distribution network grid structure, the RTDS real-time digital simulation model is built in the main controller, and multiple RTDS models can be built according to different operation modes; In the built model, two-phase short-circuit fault, three-phase short-circuit fault, metallic single-phase grounding fault, low-resistance grounding fault, high-resistance grounding fault, arc grounding fault and other faults are respectively set; Generate fault waveform files.

In one embodiment, the waveform files include: two-phase short-circuit fault model waveform files, three-phase short-circuit fault model waveform files, metallic single-phase grounding fault model waveform files, low-resistance grounding fault model waveform files, and high-resistance grounding fault model waveform files Waveform files as well as arc ground fault model waveform files.

In one embodiment, the main controller is further configured to control the power distribution terminal tester to perform analog quantity accuracy verification, remote signal quantity verification, control quantity verification and alarm signal verification on the tested distribution automation terminal .

It can be understood that, for the control distribution terminal tester to perform analog quantity accuracy verification, remote signal quantity verification, control quantity verification and alarm signal verification on the tested distribution automation terminal, manual manual testing or Automated program-controlled testing is performed.

In one embodiment, the main controller is further configured to download the waveform file to the corresponding power distribution terminal tester, issue a synchronous trigger instruction, and control the power distribution terminal tester to synchronously play back the data at the triggering time. wave file.

It can be understood that, after the waveform file is played back synchronously, the test feeder will automatically identify, locate, isolate and restore the logic of faults.

In one embodiment, the power distribution terminal tester includes: 4 groups of AC voltage output ports, 4 groups of AC current output ports, 8 switch input terminals, 4 switch output terminals, and at least one set of network interfaces.

The three groups of AC voltage output ports of the distribution terminal tester are connected to the terminals of the distribution automation terminal under test to output AC voltage; the three groups of AC current output ports of the distribution terminal tester are connected to the tested distribution automation terminal. , output AC current; the distribution terminal tester is connected with the tested distribution automation terminal through the network interface to realize the analog readback and remote signal acquisition of the tested distribution automation terminal.

Preferably, the power distribution terminal tester is a portable power distribution terminal tester, and its AC voltage output port is connected to the terminal of the distribution automation terminal under test to output AC voltage; the AC current output port of the portable power distribution terminal tester is connected to the terminal of the tested distribution automation terminal. The tested distribution automation terminal is connected to output AC current; the portable distribution terminal tester is connected with the tested distribution automation terminal through the network interface to realize the analog readback and remote signal acquisition of the tested distribution automation terminal.

As can be seen from the above description, the feeder automation function test device provided by the present invention includes a main controller, a real-time digital emulator and a plurality of distribution terminal testers. The distribution terminal testers are connected to the main controller; the main controller is connected to the main controller through a wireless network. Network with the distribution terminal tester; each distribution terminal tester is connected to a tested distribution automation terminal. The device provided by the utility model can perform synchronous testing on multiple power distribution automation terminals in non-laboratory environments such as city and county power supply companies and engineering sites, and can synchronously perform data collection, remote signaling functions, and control on multiple power distribution automation terminals. Basic functions, etc. At the same time, the utility model can perform real-time digital modeling according to the distribution network grid structure and its operation mode, and synchronously invert the fault waveforms of different lines and subsections of the same fault section, so as to verify the overall fault processing logic of the feeder automation.

Compared with the prior art, the feeder automation function test device provided by the utility model has the beneficial effects of realizing synchronous waveform inversion for multiple distribution automation terminals, simulating the real fault environment of the distribution network to the maximum extent, and improving the feeder automation. The ability of logic verification will have a good application prospect for improving the effect of automatic fault handling of feeder and its practical operation. At the same time, the utility model can test the distribution automation terminal in a non-lab environment, and has positive significance for the promotion of the feeder automation function test.

In order to further illustrate the present application, a specific application example is described in conjunction with the use method of the feeder automatic function test device.

Referring to Figure 1, the feeder automation function test device provided by this specific application example includes: 1 set of portable RTDS, 1 main controller and several portable power distribution terminal testers.

As shown in Figure 1, the portable RTDS1 and the main controller 2 are connected through the network; according to the structure of the regional distribution network grid structure of the feeder automation configuration, the RTDS real-time digital simulation model is built in the main controller 2, and multiple A RTDS model; in the built model, set up two-phase short-circuit fault, three-phase short-circuit fault, metallic single-phase grounding fault, low-resistance grounding fault, high-resistance grounding fault, arc grounding fault and other faults; portable RTDS1 for real-time simulation Calculate and generate fault waveform files.

The main controller 2 and several portable power distribution terminal testers 3n are networked through wireless 4G modules; the main controller 2 and the portable power distribution terminal tester 3n perform network time synchronization; the main controller 2 controls the portable power distribution terminal tester 3n The test distribution automation terminal 4n is subjected to conventional function verification such as analog quantity accuracy verification, remote signal quantity verification, control quantity verification, and alarm signal verification. The control mode can be selected from manual manual test or automatic program control test; main control The device 2 downloads the fault waveform file to the corresponding portable power distribution terminal tester 3n, and the main controller 2 sends a synchronous trigger command to control several portable power distribution terminal testers 3n to play back the fault waveform file synchronously according to the trigger agreed time, and the test feeder is automated. Fault identification, location, isolation and recovery logic.

Each portable power distribution terminal tester 3n is equipped with GPS/Beidou time synchronization module to realize time synchronization between each portable power distribution terminal tester 3n.

Portable power distribution terminal tester 3n is provided with 4 groups of AC voltage output ports, 4 groups of AC current output ports, 8 switch input terminals, 4 switch output terminals, and at least one network interface; portable power distribution terminal tester The 3 groups of AC voltage output ports of 3n are connected to the U _AB , U _CB and U ₀ terminals of the tested distribution automation terminal 4n to output AC voltage; the 3 groups of AC current output ports of the portable power distribution terminal tester 3n are connected to the tested distribution I _A , I _C and I ₀ or I _A , I _B and I _C of the test distribution automation terminal 4n are connected to output AC current; the portable distribution terminal tester 3n is connected to the tested distribution automation terminal 4n through a network interface, Realize the analog readback and remote signal acquisition of the tested distribution automation terminal 4n, wherein: U _AB is the AB phase line voltage, U _CB is the CB phase line voltage, U ₀ is the zero-sequence voltage; I _A is the A phase current , I _B is the B-phase current, I _C is the C-phase current, and I ₀ is the zero-sequence current.

Referring to Figure 2, the test steps performed by the feeder automatic function test device are as follows:

S0: Connect the portable RTDS with the main controller.

According to the distribution network grid structure and operation mode of the tested feeder automatic configuration area, a real-time digital simulation model of the distribution network is built in the main controller; the model is run according to different operation modes to check the rationality of the model;

S1: Select the fault point reasonably according to the structure of the grid, and set up two-phase short-circuit fault, three-phase short-circuit fault, metallic single-phase grounding fault, low-resistance grounding fault, high-resistance grounding fault, arc grounding fault and other faults at different fault points. Generate fault waveform files.

S2: The portable power distribution terminal tester is placed near the tested distribution automation terminal and wired, and the test location can be a laboratory or non-lab environment.

S3: Debug the GPS/Beidou time synchronization module of the portable power distribution terminal tester to keep the time synchronization of each portable power distribution terminal tester.

S4: Debug the main controller and the 4G communication module of each portable power distribution terminal tester to complete the wireless communication networking.

S5: Through the wireless network, the main controller downloads the fault waveform file to the corresponding portable power distribution terminal tester.

S6: Edit general test items in the main controller.

Control each portable distribution terminal tester to carry out routine test items such as analog quantity accuracy test, remote signal quantity test, control quantity test, and alarm signal test on the tested distribution automation terminal;

S7: Edit the feeder automation fault handling logic test item in the main controller.

Through the 4G wireless channel, the synchronous trigger command is issued to complete the synchronous playback of the fault waveform of each portable power distribution terminal tester, and realize the synchronous test of the automatic fault processing logic of the feeder.

S8: The main controller automatically analyzes the test result data.

The main controller automatically analyzes the test result data, compares it with the set strategy, and automatically generates a test report.

As can be seen from the above description, the feeder automation function test device provided by the present invention includes a main controller, a real-time digital emulator and a plurality of distribution terminal testers. The distribution terminal testers are connected to the main controller; the main controller is connected to the main controller through a wireless network. Network with the distribution terminal tester; each distribution terminal tester is connected to a tested distribution automation terminal. The device provided by the utility model can perform synchronous testing on multiple power distribution automation terminals in non-laboratory environments such as city and county power supply companies and engineering sites, and can synchronously perform data collection, remote signaling functions, and control on multiple power distribution automation terminals. Basic functions, etc. At the same time, the utility model can perform real-time digital modeling according to the distribution network grid structure and its operation mode, and synchronously invert the fault waveforms of different lines and subsections of the same fault section, so as to verify the overall fault processing logic of the feeder automation.

Compared with the prior art, the feeder automation function test device provided by the utility model has the beneficial effects of realizing synchronous waveform inversion for multiple distribution automation terminals, simulating the real fault environment of the distribution network to the maximum extent, and improving the feeder automation. The ability of logic verification will have a good application prospect for improving the effect of automatic fault handling of feeder and its practical operation. At the same time, the utility model can test the distribution automation terminal in a non-lab environment, and has positive significance for the promotion of the feeder automation function test.

The foregoing describes specific embodiments of the present specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in an order different from that in the embodiments and still achieve desirable results. Additionally, the processes depicted in the figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results.

Although the embodiments of the present specification provide method operation steps as described in the embodiments or flow charts, more or less operation steps may be included based on conventional or non-creative means. The sequence of steps enumerated in the embodiments is only one of the execution sequences of many steps, and does not represent the only execution sequence. When an actual device or terminal product is executed, it can be executed sequentially or in parallel according to the methods shown in the embodiments or the drawings (eg, a parallel processor or multi-threaded processing environment, or even a distributed data processing environment). The terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, product or device comprising a list of elements includes not only those elements, but also others not expressly listed elements, or also include elements inherent to such a process, method, product or device. Without further limitation, it does not preclude the presence of additional identical or equivalent elements in a process, method, product or apparatus comprising the stated elements.

The above descriptions are merely examples of the embodiments of the present specification, and are not intended to limit the embodiments of the present specification. For those skilled in the art, various modifications and variations can be made to the embodiments of the present specification. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present specification shall be included within the scope of the claims of the embodiments of the present specification.

Claims (10)

1. a feeder automation function test device, is characterized in that, comprises: main controller, real-time digital emulator and multiple power distribution terminal testers, wherein: The main controller is connected with the real-time digital simulator, and is connected with a plurality of power distribution terminal testers through a wireless network; Each distribution terminal tester is connected to the distribution automation terminal under test, The main controller is used to build a real-time digital simulation model of the distribution network according to the grid structure of the distribution network in the region where the tested feeder is automatically configured and its operation mode, and the real-time digital simulator is used to build a real-time digital simulation model of the distribution network according to the real-time digital simulation model of the distribution network. Perform real-time simulation and generate waveform files of different network nodes in the same section. 2 . The feeder automation function test device according to claim 1 , wherein the main controller is connected to a plurality of power distribution terminal testers through a 4G network or a 5G network. 3 . 3 . The feeder automation function test device according to claim 1 , wherein the power distribution terminal tester is provided with a GPS time synchronization module. 4 . 4 . The feeder automation function test device according to claim 1 , wherein the power distribution terminal tester is provided with a Beidou time synchronization module. 5 . 5 . The feeder automation function test device according to claim 1 , wherein the real-time digital simulator is a portable RTDS. 6 . 6. The feeder automation function test device according to claim 1, wherein the real-time digital simulation model of the distribution network comprises: a two-phase short-circuit fault model, a three-phase short-circuit fault model, a metallic single-phase grounding fault model, Low-resistance ground-fault model, high-resistance ground-fault model, and arc-flash ground-fault model. 7 . The feeder automatic function test device according to claim 1 , wherein the waveform files include: two-phase short-circuit fault model waveform files, three-phase short-circuit fault model waveform files, and metallic single-phase grounding fault model waveform files. 8 . , low resistance ground fault model waveform file, high resistance ground fault model waveform file and arc ground fault model waveform file. 8 . The feeder automation function test device according to claim 1 , wherein the main controller is also used to control a power distribution terminal tester to perform analog precision verification, remote control and remote control on the tested power distribution automation terminal. 9 . Signal quantity check, control quantity check and alarm signal check. 9. The feeder automation function test device according to claim 1, wherein the main controller is also used to download the waveform file to a corresponding power distribution terminal tester, issue a synchronous trigger instruction, and control the The power distribution terminal tester synchronously plays back the waveform file according to the trigger appointment time. 10. The feeder automation function test device according to claim 1, wherein the power distribution terminal tester comprises: 4 groups of AC voltage output ports, 4 groups of AC current output ports, 8 switch input terminals, 4-way switch output terminals and at least one set of network interfaces.

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