Method, system and equipment for testing distribution automation terminal and self-healing function

Abstract

The invention provides a power distribution automation terminal and a self-healing function test method, system and device, and belongs to the technical field of power distribution automation of a power system. The method comprises the following steps: establishing a test system comprising a power distribution network simulation module, power distribution automation terminals and a power distribution master station which are electrically connected with one another, and determining an actual power distribution automation terminal and a simulated power distribution automation terminal in the power distribution automation terminals according to preset fault conditions; performing simulation fault triggering on the power distribution network simulation model according to a preset fault condition; and judging whether the feeder automation function of the actual power distribution automation terminal and the self-healing function of the power distribution master station meet requirements or not according to the remote signaling deflection message of the actual power distribution automation terminal and the remote control message of the power distribution master station. The application range, the reliability and the flexibility of the test method can be improved under the condition that the FA function of the actual power distribution automation terminal and the self-healing function of the power distribution master station are tested at the same time.

Description

Technical Field

[0001] This disclosure relates to the field of power system distribution automation technology, and in particular to a testing method, system and equipment for a distribution automation terminal and its self-healing function. Background Technology

[0002] As users increasingly demand higher reliability and shorter power outage times from urban power distribution networks, multi-tie distribution network wiring modes have gained popularity due to their high equipment utilization. However, the increased number of tie switches also complicates their operation. Currently, relying on the mainstream centralized feeder automation (FA) self-healing technology for fault handling in multi-tie distribution networks results in power restoration times on the order of minutes, which is insufficient for short-term power outages. Compared to centralized FA, distributed intelligent feeder automation (DIFA) offers advantages such as faster control response and more robust control performance, but it suffers from disadvantages during power restoration. Distributed intelligent feeder automation self-healing technology, which combines centralized and intelligent distributed functions, can mitigate these disadvantages to some extent.

[0003] In related technologies, when testing the FA function of the distribution automation terminal or the self-healing function of the distribution master station in a distributed intelligent feeder automation system where the master station and the distribution automation terminal work together, the test system is generally constructed by an actual distribution automation terminal and the distribution master station that are electrically connected to each other (i.e., the terminal injection method); or the test system is constructed by a simulated distribution automation terminal and the distribution master station that are electrically connected to each other (i.e., the master station injection method).

[0004] However, when using the terminal injection method for testing, on the one hand, a large number of actual distribution automation terminals will be used, which is often difficult to meet the testing requirements on-site; on the other hand, the large number of actual distribution automation terminals makes it difficult to connect them to the corresponding number of hardware required for testing. When using the master station injection method for testing, only the self-healing function of the distribution master station can be tested, but the FA (Automatic Facilitation) function of the distribution automation terminals cannot be tested, which has limitations. Summary of the Invention

[0005] This disclosure provides a testing method, system, and equipment for distribution automation terminals and their self-healing functions. It improves the applicability, reliability, and flexibility of the testing method while simultaneously testing the FA (Automatic Facilitation) function of actual distribution automation terminals and the self-healing function of distribution master stations. The technical solution includes at least the following: Firstly, a testing method for distribution automation terminals and self-healing functions is provided. The method includes: constructing a test system comprising an interconnected distribution network simulation module, distribution automation terminals, and a distribution master station; determining, based on preset fault conditions, the actual distribution automation terminals and simulated distribution automation terminals among the distribution automation terminals; identifying the actual distribution automation terminals that should generate opening / closing changes after a fault, and the simulated distribution automation terminals that should not generate opening / closing changes after a fault; the distribution network simulation module including a distribution network simulation model; simulating fault triggering in the distribution network simulation model according to the preset fault conditions, and controlling the simulated distribution automation terminals that should generate remote signaling changes caused by protection actions to send remote signaling change messages caused by protection actions after a certain period of time; acquiring the remote signaling change messages of the actual distribution automation terminals and the remote control messages of the distribution master station after a fault occurs; and determining, based on the remote signaling change messages of the actual distribution automation terminals and the remote control messages of the distribution master station, whether the feeder automation function of the actual distribution automation terminals and the self-healing function of the distribution master station meet the requirements.

[0006] Optionally, the step of controlling the simulated distribution automation terminal that should generate a remote signaling change caused by a protection action to send a remote signaling change message after a certain period of time includes: after simulating a fault trigger on the distribution network simulation model, delaying for 1 second to 3 seconds to control the simulated distribution automation terminal that should generate a remote signaling change caused by a protection action to send a remote signaling change message caused by a protection action.

[0007] Optionally, the method further includes: setting the remote signaling and telemetry data of the simulated distribution automation terminal before simulating fault triggering in the distribution network simulation model, and putting the test system into normal operation before the fault occurs.

[0008] Optionally, putting the test system into normal operation before the failure occurs includes: putting the test system into normal operation for 3 to 10 minutes before the failure occurs.

[0009] Optionally, the distribution network simulation model is a distribution network model containing distributed generation sources, and the distribution master station is configured to remotely disconnect the distributed generation sources.

[0010] Optionally, determining whether the feeder automation function of the actual distribution automation terminal and the self-healing function of the distribution master station meet the requirements based on the remote signaling change message of the actual distribution automation terminal and the remote control message of the distribution master station includes: comparing the remote signaling change message of the actual distribution automation terminal with the remote signaling change message that should be generated when the feeder automation function of the actual distribution automation terminal operates correctly, and comparing the remote control message of the distribution master station with the remote control message that should be generated when the self-healing function of the distribution master station operates correctly, and determining whether the feeder automation function of the actual distribution automation terminal and the self-healing function of the distribution master station meet the requirements based on the comparison result.

[0011] Secondly, a testing system for distribution automation terminals and self-healing functions is provided, comprising an interconnected distribution network simulation module, a distribution master station, an actual distribution automation terminal, and a simulation testing module. The simulation testing module includes a simulated distribution automation terminal. The actual distribution automation terminal and the simulated distribution automation terminal are determined according to preset fault conditions. The actual distribution automation terminal should generate a switching change after a fault occurs, while the simulated distribution automation terminal should not. The distribution network simulation module includes a distribution network simulation model and a fault triggering submodule. The fault triggering submodule is used to trigger the distribution network simulation model according to the preset fault conditions. The power grid simulation model simulates fault triggering. The simulation test module also includes a time setting submodule and a function judgment submodule. The time setting submodule is used to control the simulated distribution automation terminal that should generate a remote signaling change caused by protection action to send a remote signaling change message after a certain time during the simulated fault triggering. The function judgment submodule is used to obtain the remote signaling change message of the actual distribution automation terminal and the remote control message of the distribution master station after the fault occurs, and to determine whether the feeder automation function of the actual distribution automation terminal and the self-healing function of the distribution master station meet the requirements based on the remote signaling change message of the actual distribution automation terminal and the remote control message of the distribution master station.

[0012] Thirdly, a computer device is provided, the computer device comprising: a memory and a processor, the memory storing at least one computer program, the at least one computer program being loaded and executed by the processor to implement the testing method for the power distribution automation terminal and self-healing function described in the above embodiments.

[0013] Fourthly, a computer-readable storage medium is provided, wherein at least one computer program is stored in the computer-readable storage medium, and the at least one computer program is loaded and executed by a processor to implement the test method for the power distribution automation terminal and self-healing function described in the above embodiments.

[0014] Fifthly, a computer program product is provided, including a computer program / instruction, which, when executed by a processor, implements the test method for the power distribution automation terminal and self-healing function described in the above embodiments.

[0015] The beneficial effects of the technical solutions provided in this disclosure include at least the following: In this embodiment, the actual and simulated distribution automation terminals in the test system are determined based on preset fault conditions. Terminals that should generate opening / closing changes after a fault occur are identified as actual distribution automation terminals, while those that should not are identified as simulated distribution automation terminals. That is, by coordinating the actual and simulated distribution automation terminals and combining the terminal injection method with the master station injection method, the actual and simulated distribution automation terminals in the constructed test system can be flexibly adjusted according to different fault conditions. Then, a fault is simulated, and after a certain time, the simulated distribution automation terminal that should generate a remote signaling change caused by a protection action is controlled to send a remote signaling change message caused by the protection action. This ensures that the remote signaling change messages from the actual and simulated distribution automation terminals are generated in a reasonable time sequence, improving the reliability of the test. Finally, based on the remote signaling change messages of the actual distribution automation terminal and the remote control messages of the distribution master station after the fault occurs, it is determined whether the feeder automation function of the actual distribution automation terminal and the self-healing function of the distribution master station meet the requirements. In this way, the number of actual distribution automation terminals can be reduced, the hardware requirements for testing can be simplified, and the applicability and flexibility of the testing method can be improved while simultaneously testing the FA function of the actual distribution automation terminal and the self-healing function of the distribution master station. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a flowchart of a test method for a power distribution automation terminal and its self-healing function provided in an embodiment of this disclosure; Figure 2 This is a flowchart of another test method for a power distribution automation terminal and self-healing function provided in this embodiment of the disclosure; Figure 3 This is a structural block diagram of a power distribution automation terminal and a self-healing function testing system provided in an embodiment of this disclosure; Figure 4This is a structural block diagram of a power distribution simulation module provided in an embodiment of this disclosure; Figure 5 This is a structural block diagram of a simulation test module provided in an embodiment of this disclosure; Figure 6 This is a schematic diagram of a power distribution network simulation model, a power distribution master station, and a power distribution automation terminal provided in an embodiment of this disclosure; Figure 7 This is a partial signal schematic diagram of the test system provided in an embodiment of this disclosure; Figure 8 This is a schematic diagram of the structure of a computer device provided in an embodiment of this disclosure.

[0018] Figure label: 100: Distribution network simulation module; 101: Distribution network simulation model; 102: Fault triggering submodule; 103: Digital input submodule; 104: Digital output submodule; 105: Analog output submodule; 106: Telemetry information measurement and calculation submodule; 200: Distribution master station; 300: Actual distribution automation terminal; 400: Simulation test module; 401: Simulated distribution automation terminal; 402: Time setting submodule; 403: Function judgment submodule; 404: System configuration submodule; 501: First communication switch; 502: Second communication switch; 503: Real-time digital analog hardware; 504: Power amplifier; 3000: Computer equipment; 3001: Processor; 3002: Memory. Detailed Implementation

[0019] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the element or object preceding “comprising” or “including” encompasses the element or object listed following “comprising” or “including” and its equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. “Up,” “down,” “left,” “right,” etc., are used only to indicate relative positional relationships, which may change accordingly when the absolute position of the described object changes. A and / or B indicates the presence of three cases: A, B, and A and B.

[0020] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0021] Figure 1 This is a flowchart illustrating a testing method for a power distribution automation terminal and its self-healing function provided in an embodiment of this disclosure. Figure 1 As shown, the method includes: In step S1001, a test system is built, which includes a power distribution network simulation module, a power distribution automation terminal and a power distribution master station that are electrically connected to each other, and the actual power distribution automation terminal and the simulated power distribution automation terminal in the power distribution automation terminal are determined according to the preset fault conditions.

[0022] The actual distribution automation terminal should generate a switch opening / closing change after a fault occurs, while the simulated distribution automation terminal should not generate a switch opening / closing change after a fault occurs. The distribution network simulation module includes a distribution network simulation model.

[0023] In step S1002, the power distribution network simulation model is simulated to trigger a fault according to the preset fault conditions, and after a certain period of time, the simulated power distribution automation terminal that should generate a remote signaling change caused by the protection action is controlled to send a remote signaling change message caused by the protection action.

[0024] In step S1003, the remote signaling change message of the actual distribution automation terminal and the remote control message of the distribution master station are obtained after the fault occurs.

[0025] In step S1004, the feeder automation function of the actual distribution automation terminal and the self-healing function of the distribution master station are determined based on the remote signaling change message of the actual distribution automation terminal and the remote control message of the distribution master station.

[0026] In this embodiment, the actual and simulated distribution automation terminals in the test system are determined based on preset fault conditions. Terminals that should generate opening / closing changes after a fault occur are identified as actual distribution automation terminals, while those that should not are identified as simulated distribution automation terminals. That is, by coordinating the actual and simulated distribution automation terminals and combining the terminal injection method with the master station injection method, the actual and simulated distribution automation terminals in the constructed test system can be flexibly adjusted according to different fault conditions. Then, a fault is simulated, and after a certain time, the simulated distribution automation terminal that should generate a remote signaling change caused by a protection action is controlled to send a remote signaling change message caused by the protection action. This ensures that the remote signaling change messages from the actual and simulated distribution automation terminals are generated in a reasonable time sequence, improving the reliability of the test. Finally, based on the remote signaling change messages of the actual distribution automation terminal and the remote control messages of the distribution master station after the fault occurs, it is determined whether the feeder automation function of the actual distribution automation terminal and the self-healing function of the distribution master station meet the requirements. In this way, the number of actual distribution automation terminals can be reduced, the hardware requirements for testing can be simplified, and the applicability and flexibility of the testing method can be improved while simultaneously testing the FA function of the actual distribution automation terminal and the self-healing function of the distribution master station.

[0027] Figure 2 This is a flowchart illustrating another testing method for a power distribution automation terminal and its self-healing function provided in this disclosure. Figure 2 As shown, the method includes: In step S2001, a test system is built, which includes a power distribution network simulation module, a power distribution automation terminal and a power distribution master station that are electrically connected to each other, and the actual power distribution automation terminal and the simulated power distribution automation terminal in the power distribution automation terminal are determined according to the preset fault conditions.

[0028] The following example illustrates the structure of the test system. Figure 3 This is a structural block diagram of a power distribution automation terminal and a self-healing function test system provided in an embodiment of this disclosure. Figure 4 This is a structural block diagram of a power distribution simulation module provided in an embodiment of this disclosure. Figure 5 This is a structural block diagram of a simulation test module provided in an embodiment of this disclosure. See also... Figures 3 to 5 The testing system includes an interconnected distribution network simulation module 100, a distribution master station 200, an actual distribution automation terminal 300, and a simulation test module 400. The distribution network simulation module 100 includes a distribution network simulation model 101, and the simulation test module 400 includes a simulated distribution automation terminal 401.

[0029] It should be noted that the actual distribution automation terminal 300 includes at least one of an actual feeder terminal unit (FTU) and an actual distribution terminal unit (DTU). The analog distribution automation terminal 401 includes at least one of an analog FTU and an analog DTU.

[0030] Optionally, the distribution network simulation module 100 can be RSCAD simulation platform software, and the simulation test module 400 can be test software. The distribution network simulation module 100 and the simulation test module 400 are installed on a test computer. The RSCAD simulation platform software can be used for modeling, compilation, running, and display, utilizing Real-Time Digital Simulation (RTDS) technology to reliably simulate the power system.

[0031] For example, the test system also includes a first communication switch 501, a second communication switch 502, RTDS hardware 503, and a power amplifier 504. The RTDS hardware 503 and the RSCAD simulation platform software can form an RTDS system. The test computer and the RTDS hardware 503 are electrically connected through the first communication switch 501. The test computer, the power distribution master station 200, and the actual power distribution automation terminal 300 are electrically connected to each other through the second communication switch 502. The RTDS hardware 503 and the actual power distribution automation terminal 300 are electrically connected through the power amplifier 504.

[0032] For example, both the first communication switch 501 and the second communication switch 502 can be Ethernet network switches.

[0033] For example, RTDS hardware 503 includes a processor that performs computing tasks and input / output interface devices (such as digital input GTDI cards, analog input GTAI cards, digital output GTDO cards, analog output GTAO cards, etc.).

[0034] Optionally, the distribution network simulation module 100 further includes a fault triggering submodule 102, a digital input (DI) submodule 103, a digital output (DO) submodule 104, an analog output (AO) submodule 105, and a telemetry information measurement and calculation submodule 106. The AO submodule 105 is used to write analog quantities, such as voltage and current, to the GTAO card. The DI submodule 103 is used to read the opening and closing commands from the actual distribution automation terminal 300 to the switches in the distribution network simulation model 101 from the GTDI card. The DO submodule 104 is used to write the opening and closing positions of the switches in the distribution network simulation model 101 to the GTDO card. The fault triggering submodule 102 is used to simulate fault triggering in the distribution network simulation model 101, such as triggering a short-circuit fault. The telemetry information measurement and calculation submodule 106 is used to measure the voltage and current at each switch in the power distribution network simulation model 101 and calculate the active power, reactive power and power factor.

[0035] Optionally, the simulation test module 400 further includes a time setting submodule 402, a function judgment submodule 403, and a system configuration submodule 404. The system configuration submodule 404 is used to set the IP address and IPv4 protocol port number of the simulated distribution automation terminal 401. The time setting submodule 402 is used to control the simulated distribution automation terminal 401, which should generate a remote signaling change caused by a protection action, to send a remote signaling change message after a certain period of time following the simulated fault triggering. The function judgment submodule 403 is used to obtain the remote signaling change message of the actual distribution automation terminal 300 and the remote control message of the distribution master station 200 after the fault occurs, and to determine whether the feeder automation function of the actual distribution automation terminal 300 and the self-healing function of the distribution master station 200 meet the requirements based on the remote signaling change message of the actual distribution automation terminal 300 and the remote control message of the distribution master station 200.

[0036] The method will be illustrated below with a specific power distribution network simulation model. Figure 6 This is a schematic diagram of a power distribution network simulation model, a power distribution master station, and a power distribution automation terminal provided in an embodiment of this disclosure. Figure 6 As shown, the distribution network simulation model is a distribution network model that includes distributed generation (DG). Figure 6The distribution network in this case is a complex multi-energy distribution network, consisting of 14 sections and 4 interconnections. M1 to M4 are the busbars of four substations, corresponding to four feeders (Feeder 1 to Feeder 4). CB1 to CB4 are the outgoing circuit breakers for each of the four feeders. k1 to k4 are examples of fault points on Feeder 1 corresponding to outgoing circuit breaker CB1. LD represents the load, DG represents distributed generation, S and SS represent sectionalizing switches, and LS represents the interconnecting switch. The dashed boxes represent ring main units, and the numbers below the dashed boxes indicate the ring main unit number. Figure 6 The diagram shows 12 ring main units (RNBs). RNBs 1 and 2 show their outgoing switches, while the outgoing sides of the remaining RNBs 3 to 12 are all configured with a single load. RNB 1 contains incoming switches S1 and S2 and outgoing switch SS21. RNB 2 contains incoming switches S3 and S4, tie switch LS1, and outgoing switches SS41 and SS42. Outgoing switches SS21 and SS42 also serve as grid connection switches for DG21 and DG42, respectively. During normal operation... Figure 6 All outgoing circuit breakers CB, sectionalizing switches S and SS are in the closed position, and all tie switches LS are in the open position.

[0037] Figure 6 When a permanent fault occurs at fault points k1 to k3, the self-healing function of the power distribution station must consider the load rate or other constraints of the feeders (feeders 2 and 3) when restoring power supply to the non-faulty area downstream of the fault point. For ease of testing, feeder 3 is fixed as a feeder for power transfer in this embodiment, that is, the tie switch LS1 should be closed during the power restoration phase. When a permanent fault occurs at fault point k4, feeder 2 is a feeder for power transfer, that is, the tie switch LS2 should be closed during the power restoration phase.

[0038] Figure 6 In this system, the distribution master station, FTU, and DTU are all secondary monitoring devices. FTU1 to FTU4 monitor outgoing circuit breakers CB1 to CB4 respectively, and DTU1 to DTU12 monitor the switches in ring main units 1 to 12 respectively. For example, DTU1 monitors incoming switches S1 and S2 and outgoing switch SS21 in ring main unit 1, and DTU2 monitors incoming switches S3 and S4, tie switch LS1, and outgoing switches SS41 and SS42 in ring main unit 2. The other DTUs, DTU3 to DTU12, are similar.

[0039] It should be noted that the access of DG may affect the FA function of the distribution automation terminal, or the self-healing function of the distribution master station may be affected if the DG is not disconnected in time during the self-healing process. In this embodiment, the distribution master station is configured to remotely disconnect the DG. The distribution automation terminal does not have the function of locally disconnecting the DG.

[0040] For example, the preset fault conditions include the location of the fault point and the fault type. A test model library can be obtained by changing various combinations of the fault point location, fault type, transition resistance, DG type and permeability, and DG disengagement method.

[0041] In this embodiment, the simulated distribution automation terminal does not have the function of sending remote signaling change messages for opening or closing. The actual distribution automation terminal should generate opening or closing change messages after a fault occurs, while the simulated distribution automation terminal should not generate opening or closing change messages after a fault occurs. The distribution network simulation module includes a distribution network simulation model.

[0042] like Figure 6 As shown, when a fault occurs at fault point k1, if the DIFA function of the distribution automation terminal and the self-healing function of the distribution master station operate correctly, the outgoing circuit breaker CB1 and the incoming switch S1 should be tripped locally to isolate the fault. The distribution master station should remotely control the outgoing switches SS21 and SS42 to trip and disconnect DG21 and DG42, and remotely control the tie switch LS1 to close to restore power supply to the non-faulty area downstream of the fault point. Therefore, FTU1, DTU1, and DTU2 can be identified as actual distribution automation terminals, while the remaining FTU2~FTU4 and DTU3~DTU12 are simulated distribution automation terminals. When a fault occurs at fault point k2, if the DIFA function of the distribution automation terminal and the self-healing function of the distribution master station operate correctly, the incoming switches S2 and S3 should be tripped locally to isolate the fault. The distribution master station should remotely trip the outgoing switch SS42 to disconnect DG42 and remotely close the tie switch LS1 to restore power supply to the non-faulty area downstream of the fault point. Therefore, DTU1 and DTU2 can be identified as actual distribution automation terminals, while the remaining FTU1~FTU4 and DTU3~DTU12 are simulated distribution automation terminals.

[0043] For example, in step S2001, the location settings of the power distribution automation terminal can also be configured.

[0044] For example, a simulated distribution automation terminal includes a remote signaling and telemetry submodule for normal operation and a remote signaling change submodule caused by protection actions. For instance, the remote signaling and telemetry point settings can be configured in the remote signaling and telemetry submodule for normal operation of the simulated distribution automation terminal, and the remote signaling change submodule caused by protection actions can be configured to configure the point settings for remote signaling changes caused by protection actions. These point settings must be consistent with the point settings of the distribution master station. The configuration tool of the distribution automation terminal can be used to configure the remote signaling, telemetry, and remote control point settings of the actual distribution automation terminal according to the point settings of the distribution master station.

[0045] For example, in step S2001, connections can also be established between the various power distribution automation terminals.

[0046] Figure 7 This is a partial signal schematic diagram of the test system provided in an embodiment of this disclosure. See also... Figure 4 and Figure 7 The RTDS hardware 503's GTAO card outputs multiple small voltage signals. These signals are amplified by the power amplifier 504 into electrical quantities for the secondary side of the instrument transformer and input to the actual distribution automation terminal 300. Furthermore, the actual distribution automation terminal can read the open and closed positions of the switches in the distribution network simulation model 101 via the GTDO card, and control the open and closed positions of the switches in the distribution network simulation model 101 by inputting open and closed commands via the GTDI card. Additionally, the distribution automation terminals on both sides of the fault point need to establish a fiber optic connection for communication conforming to the 61850 protocol.

[0047] Specifically, with Figure 6 For example, when a fault occurs at fault point k2, DTU1 and DTU2 are the actual distribution automation terminals. DTU1 and DTU2 are interconnected via optical fiber. The GTAO card can output small voltage signals proportional to the voltage and current at switches S1, S2, SS21, S3, S4, LS1, SS41, and SS42. These signals are converted into voltage and current on the secondary side of the transformers by power amplifiers and connected to the corresponding DTU1 and DTU2. If the DIFA function of the distribution automation terminal and the self-healing function of the distribution master station operate correctly, during the fault isolation phase, DTU1 and DTU2 can output the tripping command for S2 and S3 to the GTDI card after logical judgment, thereby controlling the tripping of S2 and S3; during the remote disconnection phase, DTU2 receives the remote tripping command for SS42 from the distribution master station and controls SS42 to trip via the GTDI card; during the power restoration phase, DTU2 receives the remote closing command from the distribution master station and controls LS1 to close via the GTDI card.

[0048] For example, in step S2001, network configuration can also be performed on the distribution automation terminals. For instance, the IP addresses and 104 protocol port numbers of each distribution automation terminal at the distribution master station can be read and entered into the communication settings of the actual distribution automation terminals and the system configuration submodule in the simulation test module. This enables the distribution master station, the actual distribution automation terminals, and the simulated distribution automation terminals to recognize each other and exchange various relevant information.

[0049] In step S2002, before simulating fault triggering in the power distribution network simulation model, the remote signaling and telemetry data of the simulated power distribution automation terminal are set, and the test system is put into normal operation before the fault occurs.

[0050] For example, see Figures 4 to 7The RSCAD simulation platform software can be run by clicking the RUNTIME interface. The telemetry information measurement and calculation submodule 106 reads the data required by the distribution master station 200 and fills it into the telemetry data field of each simulated distribution automation terminal 401. It also fills the telemetry data of the distribution network simulation model 101 into the corresponding telemetry data field of each simulated distribution automation terminal 401. This telemetry data includes information such as the open and closed positions of each switch and protection actions. During normal operation, the telemetry data of each outgoing circuit breaker CB, sectionalizing switch S, and SS in the closed position is 1, the telemetry data of each tie switch LS in the open position is 1, and all other telemetry data are 0. After the actual distribution automation terminal 300 and the simulated distribution automation terminal 401 are put into operation and summoned by the distribution master station 200, each distribution automation terminal will send telemetry and telemetry data to the distribution master station 200. Here, the actual power distribution automation terminal 300 sends real-time data, while the simulated power distribution automation terminal 401 sends the data entered by the testers in the simulated test module 400.

[0051] For example, the test system can be put into normal operation for 3 to 10 minutes before a fault occurs. This ensures that the distribution master station 200 has completed the general call to all distribution automation terminals before the simulated distribution automation terminal 401, which should subsequently generate a remote signaling change caused by a protection action, sends the remote signaling change message caused by the protection action.

[0052] In step S2003, the distribution network simulation model is simulated to trigger a fault according to the preset fault conditions, and after a certain period of time, the simulated distribution automation terminal that should generate a remote signaling change caused by the protection action is controlled to send a remote signaling change message caused by the protection action.

[0053] For example, the fault triggering submodule 102 can be used to simulate fault triggering in the power distribution network simulation model 101.

[0054] For example, the timing of the remote signaling change message caused by the protection action issued by the analog power distribution automation terminal 401 can be set through the time setting submodule 402.

[0055] Optionally, in step S2003, after simulating a fault trigger on the distribution network simulation model 101, a delay of 1 to 3 seconds is applied to control the simulated distribution automation terminal 401 to send a remote signaling change message caused by the protection action. This ensures that the fault occurs first, followed by the simulated distribution automation terminal 401 sending the remote signaling change message caused by the protection action, so that the remote signaling change messages of the actual distribution automation terminal 300 and the simulated distribution automation terminal 401 are generated in a reasonable time sequence, which helps improve the reliability of the test. For example, if the local cause of the remote signaling change caused by the protection action of the DIFA function is a current protection action, then the simulated distribution automation terminal 401 should send a remote signaling change message caused by the current protection action.

[0056] Specifically, taking a fault occurring at fault point k2 as an example, DTU1 and DTU2 are actual distribution automation terminals. When a fault occurs at fault point k2, FTU1 sends a remote signaling change message caused by the protection action. If the DIFA function of the distribution automation terminal and the self-healing function of the distribution master station operate correctly, DTU1 will send a remote signaling change message caused by the protection action at S1 and S2. In reality, DTU1 does not receive the protection action information from DTU2, but DTU2 receives the protection action information from DTU1 through fiber optic communication. After logical judgment, DTU1 commands S2 to open, and DTU2 commands S3 to open. After S2 and S3 are opened, DTU1 and DTU2 will send opening remote signaling change messages respectively. After receiving the opening change messages from DTU1 and DTU2, the distribution master station confirms that the fault isolation is successful. Then, it will send a command to remotely open SS42 to disconnect DG42 and remotely close LS1.

[0057] In step S2004, the remote signaling change message of the actual distribution automation terminal and the remote control message of the distribution master station are obtained after the fault occurs.

[0058] For example, the remote signaling change message of the actual power distribution automation terminal 300 and the remote control message of the power distribution master station 200 after the fault occurs can be obtained through the functional judgment submodule 403.

[0059] Specifically, taking a fault occurring at fault point k2 as an example, DTU1 and DTU2 are actual distribution automation terminals. When a fault occurs at fault point k2, if the DIFA function of the distribution automation terminal and the self-healing function of the distribution master station operate correctly, the function judgment submodule 403 in the simulation test module 400 can listen to the protection action and tripping remote signal change message issued by DTU1, the tripping remote signal change message issued by DTU2, and the remote control message issued by the distribution master station for remote control SS42 tripping and remote control LS1 closing.

[0060] In step S2005, the feeder automation function of the actual distribution automation terminal and the self-healing function of the distribution master station are judged to meet the requirements based on the remote signaling change message of the actual distribution automation terminal and the remote control message of the distribution master station.

[0061] For example, the function judgment submodule 403 can determine whether the feeder automation function of the actual distribution automation terminal 300 and the self-healing function of the distribution master station 200 meet the requirements based on the remote signaling change message of the actual distribution automation terminal 300 and the remote control message of the distribution master station 200.

[0062] For example, in step S2005, the function judgment submodule 403 can compare the remote signaling change message of the actual distribution automation terminal 300 with the remote signaling change message that should be generated when the feeder automation function of the actual distribution automation terminal 300 is operating correctly, and compare the remote control message of the distribution master station 200 with the remote control message that should be generated when the self-healing function of the distribution master station 200 is operating correctly. Based on the comparison results, it is determined whether the feeder automation function of the actual distribution automation terminal 300 and the self-healing function of the distribution master station 200 meet the requirements.

[0063] For example, a test report can be generated by clicking "Generate Report" on the module interface of the functional judgment submodule 403. This test report includes two parts: first, whether the remote signaling change message of the actual distribution automation terminal 300 is consistent with the remote signaling change message that should be generated when the feeder automation function of the actual distribution automation terminal 300 operates correctly, to determine whether the feeder automation function of the actual distribution automation terminal 300 is correct; second, whether the remote control message of the distribution master station 200 is consistent with the remote control message that should be generated when the self-healing function of the distribution master station 200 operates correctly, to determine whether the self-healing function of the distribution master station 200 is correct. Specifically, determining whether the self-healing function of the distribution master station 200 is correct includes: determining whether the fault location on the monitoring interface of the distribution master station 200 is correct, and determining whether the strategy of remotely disconnecting the DG and restoring power supply to the downstream non-faulty area of ​​the fault point by the distribution master station 200 is correct.

[0064] It should be noted that the above-mentioned power distribution network simulation model and preset fault conditions are only examples. In other embodiments, different test cases can be selected from the test model library to repeat the above steps S2001 to S2005 to obtain test reports for different test cases. Based on these test reports, it can be determined whether the DIFA function of the power distribution automation terminal and the self-healing function of the power distribution master station meet the requirements in the application background of complex power distribution networks in multi-energy scenarios.

[0065] The following are system embodiments of this application. For details not described in detail in the system embodiments, please refer to the above method embodiments.

[0066] This disclosure also provides a test system for a power distribution automation terminal and its self-healing function. See [link to relevant documentation]. Figures 3 to 5 as well as Figure 7 The testing system includes an interconnected distribution network simulation module 100, a distribution master station 200, an actual distribution automation terminal 300, and a simulation test module 400. The simulation test module 400 includes a simulated distribution automation terminal 401. The actual distribution automation terminal 300 and the simulated distribution automation terminal 401 are determined according to preset fault conditions. The actual distribution automation terminal 300 should generate a switching change after a fault occurs, while the simulated distribution automation terminal 401 should not. The distribution network simulation module 100 includes a distribution network simulation model 101 and a fault triggering submodule 102. The fault triggering submodule 102 is used to simulate fault triggering in the distribution network simulation model 101 according to preset fault conditions. The simulation test module 400 also includes a time setting submodule 402 and a function judgment submodule 403. The time setting submodule 402 is used to control the simulated distribution automation terminal 401, which should generate a remote signaling change caused by the protection action, to send a remote signaling change message after a certain period of time following the simulated fault triggering. The function judgment submodule 403 is used to obtain the remote signaling change message of the actual distribution automation terminal 300 and the remote control message of the distribution master station 200 after the fault occurs, and to determine whether the feeder automation function of the actual distribution automation terminal 300 and the self-healing function of the distribution master station 200 meet the requirements based on the remote signaling change message of the actual distribution automation terminal 300 and the remote control message of the distribution master station 200.

[0067] It should be noted that the testing system for the distribution automation terminal and self-healing function provided in the above embodiments is only illustrated by the division of the above functional modules. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the system can be divided into different functional modules to complete all or part of the functions described above. Furthermore, the testing system for the distribution automation terminal and self-healing function provided in the above embodiments and the testing method embodiments for the distribution automation terminal and self-healing function belong to the same concept; the specific implementation process is detailed in the method embodiments and will not be repeated here.

[0068] The module division in this embodiment is illustrative and represents only one logical functional division. In actual implementation, other division methods are possible. Furthermore, the functional modules in the various embodiments of this disclosure can be integrated into a single processor, exist as separate physical entities, or be integrated into a single module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0069] If the integrated module is implemented as a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this disclosure, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a terminal device (which may be a personal computer, mobile phone, or communication device, etc.) or processor to execute all or part of the steps of the methods of the various embodiments of this disclosure. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0070] Figure 8 This is a schematic diagram of the structure of a computer device provided in an embodiment of this disclosure. For example... Figure 8 As shown, the computer device 3000 includes a processor 3001 and a memory 3002.

[0071] Processor 3001 may include one or more processing cores, such as a quad-core processor, an octa-core processor, etc. Processor 3001 may be implemented using at least one hardware form selected from DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). Processor 3001 may also include a main processor and a coprocessor. The main processor, also known as a CPU (Central Processing Unit), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, processor 3001 may integrate a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, processor 3001 may also include an AI (Artificial Intelligence) processor, which is used to handle computational operations related to machine learning.

[0072] The memory 3002 may include one or more computer-readable storage media, which may be non-transitory. The memory 3002 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In some embodiments, the non-transitory computer-readable storage media in the memory 3002 is used to store at least one instruction, which is executed by the processor 3001 to implement the test method for the power distribution automation terminal and self-healing function provided in the embodiments of this disclosure.

[0073] Those skilled in the art will understand that Figure 8 The structure shown does not constitute a limitation on the computer device 3000, and may include more or fewer components than shown, or combine certain components, or use different component arrangements.

[0074] This disclosure also provides a non-transitory computer-readable storage medium, wherein when the instructions in the storage medium are executed by the processor of a computer device, the computer device is able to execute the test method for the power distribution automation terminal and self-healing function provided in this disclosure.

[0075] This disclosure also provides a computer program product, including a computer program / instruction, which, when executed by a processor, implements the testing method for the power distribution automation terminal and self-healing function provided in this disclosure.

[0076] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A test method for a power distribution automation terminal and its self-healing function, characterized in that, The method includes: A test system is constructed, comprising an interconnected distribution network simulation module, distribution automation terminals, and a distribution master station. Based on preset fault conditions, the actual distribution automation terminals and simulated distribution automation terminals are determined. The actual distribution automation terminal is the one that should generate a switching change after a fault occurs, while the simulated distribution automation terminal is the one that should not generate a switching change after a fault occurs. The distribution network simulation module includes a distribution network simulation model. The power distribution network simulation model is simulated to trigger a fault according to the preset fault conditions, and after a certain period of time, the simulated power distribution automation terminal that should generate a remote signaling change caused by the protection action is controlled to send a remote signaling change message caused by the protection action. After a fault occurs, obtain the remote signaling change message of the actual distribution automation terminal and the remote control message of the distribution master station; Based on the remote signaling change message of the actual distribution automation terminal and the remote control message of the distribution master station, determine whether the feeder automation function of the actual distribution automation terminal and the self-healing function of the distribution master station meet the requirements.

2. The test method for the distribution automation terminal and self-healing function according to claim 1, characterized in that, The process of controlling the simulated distribution automation terminal to send a remote signaling change message caused by a protection action after a certain period of time includes: After simulating a fault in the power distribution network simulation model, a delay of 1 to 3 seconds is applied to control the simulated power distribution automation terminal to send a remote signaling change message caused by the protection action.

3. The test method for the distribution automation terminal and self-healing function according to claim 1, characterized in that, The method further includes: Before simulating fault triggering in the power distribution network simulation model, the remote signaling and telemetry data of the simulated power distribution automation terminal are set, and the test system is put into normal operation before the fault occurs.

4. The test method for the distribution automation terminal and self-healing function according to claim 3, characterized in that, The step of putting the test system into normal operation before a failure occurs includes: The test system was put into normal operation for 3 to 10 minutes before the failure occurred.

5. The test method for the distribution automation terminal and self-healing function according to any one of claims 1 to 4, characterized in that, The power distribution network simulation model is a power distribution network model that includes distributed generation sources, and the power distribution master station is configured to remotely disconnect the distributed generation sources.

6. The test method for the distribution automation terminal and self-healing function according to any one of claims 1 to 4, characterized in that, The step of determining whether the feeder automation function of the actual distribution automation terminal and the self-healing function of the distribution master station meet the requirements based on the remote signaling change message of the actual distribution automation terminal and the remote control message of the distribution master station includes: The remote signaling change message of the actual distribution automation terminal is compared with the remote signaling change message that should be generated when the feeder automation function of the actual distribution automation terminal is operating correctly. The remote control message of the distribution master station is compared with the remote control message that should be generated when the self-healing function of the distribution master station is operating correctly. Based on the comparison results, it is determined whether the feeder automation function of the actual distribution automation terminal and the self-healing function of the distribution master station meet the requirements.

7. A testing system for a power distribution automation terminal and its self-healing function, characterized in that, It includes an interconnected power distribution network simulation module, a power distribution master station, actual power distribution automation terminals, and a simulation testing module. The simulation test module includes a simulated power distribution automation terminal. The actual power distribution automation terminal and the simulated power distribution automation terminal are determined according to preset fault conditions. The actual power distribution automation terminal should generate a switching change after a fault occurs, and the simulated power distribution automation terminal should not generate a switching change after a fault occurs. The power distribution network simulation module includes a power distribution network simulation model and a fault triggering submodule. The fault triggering submodule is used to simulate fault triggering in the power distribution network simulation model according to the preset fault conditions. The simulation test module further includes a time setting submodule and a function judgment submodule. The time setting submodule is used to control the simulated distribution automation terminal that should generate a remote signaling change caused by a protection action to send a remote signaling change message after a certain period of time following the simulated fault triggering. The function judgment submodule is used to obtain the remote signaling change message of the actual distribution automation terminal and the remote control message of the distribution master station after the fault occurs, and to determine whether the feeder automation function of the actual distribution automation terminal and the self-healing function of the distribution master station meet the requirements based on the remote signaling change message of the actual distribution automation terminal and the remote control message of the distribution master station.

8. A computer device, characterized in that, The computer device includes a memory and a processor, wherein the memory stores at least one computer program, which is loaded and executed by the processor to implement the method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one computer program, which is loaded and executed by a processor to implement the method according to any one of claims 1 to 6.

10. A computer program product comprising a computer program / instructions, characterized in that, When the computer program / instructions are executed by the processor, they implement the method described in any one of claims 1 to 6.

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