Method, system, equipment and medium for testing multi-influence-quantity coupling and interference configuration of real model field of power distribution network

Abstract

The invention relates to the technical field of multi-intelligent task analysis, and discloses a power distribution network real field multi-influence coupling and interference configuration test method, system and device and a medium, and the method comprises the steps: enabling a complex multi-influence scene design to be rapidly completed without programming through a scene sequence control unit, and reducing the configuration difficulty and human errors; a multi-influence-quantity physical simulation unit and a communication interference simulation unit are combined to establish a basic operation condition which is completely consistent with an actual topology, and result distortion caused by a traditional isolated test is avoided; a plurality of controllable aging simulations are accurately superposed on a real working condition, an equipment degradation process is accelerated and reproduced, evolutionary faults are injected according to a preset time sequence, communication interference can be synchronously superposed, and extreme scenes of field multi-factor linkage, fault development and communication abnormity coupling are truly reproduced. The problem of deep maloperation or refusal operation which cannot be exposed in the traditional single test can be fully shown; the problems of incomplete and inaccurate real-model field measurement and low efficiency in the prior art can be solved.

Description

Technical Field

[0001] This invention relates to the field of simulation testing technology, and in particular to a method, system, equipment and medium for testing the coupling and interference configuration of multiple influence quantities in a true-world distribution network. Background Technology

[0002] With the emergence of new equipment in modern smart power distribution networks, it is necessary not only to assess their performance and functions under normal operating conditions, but also to evaluate their anti-interference capabilities under complex environments and communication anomalies. As a key platform for verifying new equipment, technologies, and strategies in distribution networks, the full-scale test field provides a completely consistent real electrical environment for testing by replicating the primary and secondary systems of a real power grid. Although current full-scale test fields can meet the testing requirements of conventional single-phase grounding, phase-to-phase short circuit, and open-circuit faults, their testing still has the following limitations: First, existing testing methods are mostly focused on single fault types or single influencing quantities. The tests are often ideal and isolated, failing to reflect the complex process of multi-factor coupling, cascading, and evolution in real-world scenarios. Second, traditional tests mainly focus on electrical quantities, while the simulation of influencing quantities such as line aging, loose connections, equipment status, and external environments (such as communication interference) is insufficient, and there is a lack of means to actively correlate them with electrical faults. Furthermore, most full-scale test fields rely on the natural aging of equipment or the observation of accidental interference, making it impossible to actively and repeatedly configure these influencing quantities and interferences, resulting in long test cycles, low efficiency, and difficulty in systematically evaluating the robustness of equipment and systems.

[0003] To support the anti-interference capability testing of key equipment in the power distribution network, it is necessary to simulate typical interference events based on common influencing factors such as missed detections and misjudgments in the field, and to couple common climatic factors and communication anomalies to achieve high-fidelity reproduction of the operating environment. This allows for a comprehensive assessment of the equipment's adaptability to complex environments. Therefore, a systematic method is urgently needed that can flexibly, safely, and repeatedly configure various influencing quantities and interferences in a real-world test field and perform coupled testing of them to fully expose potential system risks and verify the effectiveness of protection strategies. Summary of the Invention

[0004] In view of the aforementioned existing problems, the present invention is proposed.

[0005] Therefore, this invention provides a method and system for testing the coupling and interference configuration of multiple influence quantities in a real-world distribution network, which solves the problem that current real-world testing methods are singular, idealized, and unable to controllably reproduce the coupling and interference scenarios of multiple influence quantities.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: In a first aspect, the present invention provides a method for testing the coupling of multiple influencing variables and the configuration of interference in a real-world distribution network, comprising: constructing an experimental evolution scenario of the distribution network and decomposing it into multiple influencing variable nodes and interference injection nodes; The graphical timing editor of the scene sequence control unit receives user operations and parameter settings for multiple influencing nodes and interference injection nodes, and generates timing control scripts. According to the timing control script, a synchronization trigger command is issued to the multi-influence quantity physical simulation unit and the communication interference simulation unit; The multi-influence physical simulation unit responds to commands and adjusts the parameters of the adjustable line impedance module, programmable load module, and neutral grounding mode module at corresponding time points to establish a basic operating condition consistent with the target distribution network topology. Under basic operating conditions, the multi-influence quantity physics simulation unit starts different internal simulation modules at preset time points according to the timing control script, injects different parameters into the corresponding objects, and obtains operating data; The communication interference simulation unit injects interference into the power distribution automation communication link according to the timing control script, and obtains secondary messages accompanied by communication anomalies; All monitoring and operational data and messages are collected and fused to generate experimental data that includes the entire process of the coupled evolution of multiple influencing factors.

[0007] As a preferred embodiment of the multi-influence coupling and interference configuration test method for a real-world distribution network described in this invention, the scenario sequence control unit has a built-in standardized interference parameter template library. The user selects a preset template and automatically fills in the default intensity parameters and duration of the corresponding node.

[0008] As a preferred embodiment of the multi-influence coupling and interference configuration test method for a true-world distribution network described in this invention, the method involves adjusting the parameters of the adjustable line impedance module, the programmable load module, and the neutral grounding mode module at corresponding time points to establish a basic operating condition consistent with the target distribution network topology, including: According to the test requirements, set the corresponding line impedance parameters according to the target distribution network topology; By using the adjustable line impedance module and the programmable load module, resistive, inductive, and capacitive loads of appropriate sizes are applied. The adjustable line impedance is set to the impedance value corresponding to the target line length, and the programmable load is set to the target power curve. The neutral point grounding mode module can switch to one of the following modes: ungrounded, grounded via arc suppression coil, or grounded via small resistor.

[0009] The beneficial effects of this preferred technical solution are: establishing a basic operating condition that is completely consistent with the actual topology can ensure that all subsequent aging, faults and interference are carried out in a real electrical environment, eliminating the problem of test results being seriously inconsistent with the field due to traditional no-load and no correct impedance.

[0010] As a preferred embodiment of the multi-influence quantity coupling and interference configuration testing method for a real-world distribution network described in this invention, wherein: under basic operating conditions, the multi-influence quantity physical simulation unit starts different internal simulation modules at preset time points according to a timing control script, injects different parameters into the corresponding objects, and obtains operating data, including: The multi-influence physical simulation unit starts the aging test module and / or the distributed creepage / electro-erosion module at preset time points according to the timing control script, applies the corresponding environmental parameters to the designated primary equipment, and obtains the changed state of the equipment. When the equipment is in a changed state, the multi-influence physical simulation unit injects faults through the fault module according to the timing control script, and obtains the composite electrical quantities of fault superposition and aging.

[0011] As a preferred embodiment of the multi-influence quantity coupling and interference configuration test method for a real-world distribution network described in this invention, the multi-influence quantity physical simulation unit injects faults through the fault module according to the timing control script, including injecting single or evolving faults. Among them, the evolutionary fault includes the following sequence: first, a single-phase high-resistance ground is injected, which continues for a preset time and then upgrades to a two-phase short circuit, and then to a three-phase short circuit.

[0012] As a preferred embodiment of the method for testing the coupling and interference configuration of multiple influence quantities in a real-world distribution network as described in this invention, the timing control script includes the trigger time, duration, and intensity parameters of each node.

[0013] As a preferred embodiment of the multi-influence coupling and interference configuration test method for a real-world distribution network described in this invention, the method further includes: analyzing the accuracy of the tested device's operation based on the fused test data, automatically adjusting the timing control script, and conducting iterative tests.

[0014] Secondly, the present invention provides a test system for the coupling and interference configuration of multiple influencing factors in a real-world distribution network, comprising: The scenario sequence control unit is used to customize test scenarios, set parameters, execute control commands, and monitor data throughout the entire process. The multi-influence quantity physical simulation unit is used to simulate the influence quantities of a real test field, including: adjustable line impedance module, fault simulation module, distributed creepage / electro-erosion module, programmable load module, neutral grounding method module, and aging test module; The communication interference simulation unit is used to simulate abnormal operating conditions in the communication lines of intelligent equipment in the power distribution network.

[0015] Thirdly, the present invention provides a computer device, comprising: Memory and processor; The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions. When the computer-executable instructions are executed by the processor, they implement the steps of a method for testing the coupling and interference configuration of multiple influence quantities in a true-world distribution network.

[0016] Fourthly, the present invention provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the steps of the method for testing the coupling and interference configuration of multiple influence quantities in a true-world distribution network.

[0017] Compared with existing technologies, the beneficial effects of this invention are as follows: By combining a graphical timing editor for the scenario sequence control unit with a standardized template library, complex multi-influence scenario design can be completed quickly without programming, reducing configuration difficulty and human error; by combining a multi-influence physical simulation unit and a communication interference simulation unit, a basic operating condition completely consistent with the actual topology is established, avoiding the distortion of results caused by traditional isolated testing; controllable electrical-thermal-humidity-contamination aging is accurately superimposed on real operating conditions, accelerating the reproduction of equipment degradation processes; evolutionary faults are injected according to a preset timing sequence, and communication interference can be superimposed synchronously, realistically reproducing extreme scenarios of multi-factor chaining, fault development, and abnormal communication coupling on site, enabling the full manifestation of deep-seated maloperation or failure to operate problems that cannot be exposed by traditional single testing; the synchronous collection and fusion analysis of primary electrical quantities and secondary messages throughout the entire process can form complete coupled evolution chain data, supporting automatic iterative optimization, solving the problems of incompleteness, inaccuracy, and low efficiency of existing real-world field tests, enabling new equipment and systems in the distribution network to be fully verified before being connected to the network, and improving the robustness and field operation resilience under complex scenarios. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall process of a test method for coupling and interference configuration of multiple influence quantities in a real-world distribution network according to an embodiment of the present invention.

[0020] Figure 2This is a schematic diagram of an experimental sequence and system deployment structure for a real-world field multi-influence coupling and interference configuration test of a power distribution network, as described in one embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of a drag-and-drop visual timing editor interface for testing the coupling and interference configuration of multiple influence quantities in a real-world distribution network, according to an embodiment of the present invention. Detailed Implementation

[0022] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0023] Example 1, referring to Figure 1 As an embodiment of the present invention, a method for testing the coupling of multiple influencing factors and interference configuration in a true-world distribution network is provided, comprising: S100: Construct a distribution network experimental evolution scenario, decompose it into multiple influencing quantity nodes and interference injection nodes; S200: Receives user operations and parameter settings for multiple influencing nodes and interference injection nodes through the graphical timing editor of the scene sequence control unit, and generates timing control scripts; S300: According to the timing control script, send a synchronization trigger command to the multi-influence quantity physical simulation unit and the communication interference simulation unit; S400: Multi-influence quantity physical simulation unit response command, adjusts the parameters of adjustable line impedance module, programmable load module and neutral grounding mode module at the corresponding time point, and establishes basic operating conditions consistent with the target distribution network topology; S500: Under basic operating conditions, the multi-influence quantity physics simulation unit starts different internal simulation modules at preset time points according to the timing control script, injects different parameters into the corresponding objects, and obtains operating data; S600: The communication interference simulation unit injects interference into the power distribution automation communication link according to the timing control script, and obtains a secondary message accompanied by communication abnormality; S700: Collects all monitoring and operational data and messages, and integrates them to generate experimental data that includes the entire process of the coupled evolution of multiple influencing factors.

[0024] It should be noted that, addressing the main problems in the background technology, by setting steps S100-S700, based on the scenario sequence control unit, the influence quantity modules of the multi-influence physical simulation unit are precisely controlled in a programmable, time-sequential, and coupled manner, thereby generating test sequences that highly reproduce the complex operating conditions of real distribution networks. This allows for convenient and quick configuration of interference parameters such as line length, load, fault, aging test environment, and communication interference, and the construction of a test sequence library that conforms to actual distribution network operating scenarios, enabling rapid implementation of real-world distribution network testing.

[0025] Example 2, refer to Figure 1 As an embodiment of the present invention, based on the above embodiment, a method for testing the coupling and interference configuration of multiple influence variables in a real-world distribution network is provided.

[0026] In this embodiment of the application, step S100 constructs a power distribution network experimental evolution scenario, which is decomposed into multiple influencing quantity nodes and interference injection nodes; Specifically, the multi-influence simulation units are deployed to key primary and secondary nodes in the live-action field, completing the primary cable connections. The control and signal lines of all modules are then connected to the scene sequence control unit, completing system integration.

[0027] S200: Receives user operations and parameter settings for multiple influencing nodes and interference injection nodes through the graphical timing editor of the scene sequence control unit, and generates timing control scripts; Specifically, the scenario sequence control unit provides a graphical human-machine interface for customizing test scenarios, setting parameters, executing control commands, and monitoring data throughout the process.

[0028] In this embodiment of the application, the scene sequence control unit in step S200 has a built-in standardized interference parameter template library. The user selects a preset template to automatically fill in the default intensity parameters and duration of the corresponding node.

[0029] Specifically, the template library covers common interference types in power distribution networks, such as line aging, communication packet loss, and load surges. Typical parameters for each type of interference are preset in advance, so users do not need to calculate manually. After selecting a template, they only need to fine-tune the values ​​to complete the configuration.

[0030] In one optional implementation, the scene sequence control unit provides a drag-and-drop visual timing editor. This editor uses a timeline as its core interface and allows users to drag and drop interference nodes such as line impedance adjustment, fault injection, and communication interference directly to the target time point. The system automatically generates timing control scripts without the need for coding and supports real-time preview of the timing logic. Parameters can be flexibly modified by clicking on nodes. The scene sequence control unit has a high-precision timing synchronization function, which can ensure that various interferences and influencing factors are accurately triggered according to the preset time sequence.

[0031] For example, a Gantt chart can be used, where each bar represents an influencing action. Users can drag the bar length to adjust the duration and drag the position to adjust the trigger time. Overlapping bars indicate parallel interference, and mouse hover displays parameter details, which can be modified by double-clicking. This is particularly suitable for overall control of long sequences and multi-track parallel scenarios.

[0032] S300: According to the timing control script, send a synchronization trigger command to the multi-influence quantity physical simulation unit and the communication interference simulation unit; Specifically, the multi-influence quantity physical simulation unit is the main hardware device for simulating the influence quantities of a real-world test field. It includes an adjustable line impedance module, a fault simulation module, a distributed creepage / electro-erosion module, a programmable load module, a neutral grounding method module, and an aging test module.

[0033] In one alternative implementation, the multi-influence quantity physics simulation unit can also be expanded with additional modules as needed, such as: ice and snow icing / wind load simulation module, electromagnetic interference injection module, etc.

[0034] It should be noted that the multi-influence physical simulation unit can communicate with the central control unit via fiber optic communication lines and can maintain high synchronization with the influence quantity triggering commands of the scene sequence control unit.

[0035] Specifically, the communication interference simulation unit is deployed in the fiber optic communication backbone network of the distribution network real-world test, which can simulate abnormal communication conditions between intelligent devices and between intelligent devices and the distribution automation master station.

[0036] It should be noted that the communication interference simulation unit can simulate communication message delays, bit errors, packet loss, and out-of-order delivery.

[0037] In this embodiment of the application, the timing control script in step S300 includes the trigger time, duration and intensity parameters of each node.

[0038] Specifically, a timing control script is essentially a structured sequence of instructions with precise timestamps; For example, for adjustable line impedance adjustment, the trigger time can be set to absolute time or offset from the previous event; the duration can be set to until the end of the test; the strength parameters are set to impedance values ​​R=15.6Ω, L=0.032H, and C=1.2μF.

[0039] In another alternative implementation, based on the above implementation, the timing control script can be stored and distributed in JSON or XML format.

[0040] S400: Multi-influence quantity physical simulation unit response command, adjusts the parameters of adjustable line impedance module, programmable load module and neutral grounding mode module at the corresponding time point, and establishes basic operating conditions consistent with the target distribution network topology; It should be noted that the basic operating condition sequence mainly simulates the normal operating conditions of the distribution network and is a prerequisite sequence for simulating other operating conditions.

[0041] In this embodiment of the application, step S400 involves adjusting the parameters of the adjustable line impedance module, the programmable load module, and the neutral grounding method module at the corresponding time points to establish a basic operating condition consistent with the target distribution network topology, including the following steps A1-A3: A1: Set the corresponding line impedance parameters according to the target distribution network topology, based on the test requirements; Specifically, line impedance can include cable type, length, and overhead line parameters.

[0042] A2: By using the adjustable line impedance module and the programmable load module, apply resistive, inductive, and capacitive loads of appropriate sizes, set the adjustable line impedance to the impedance value corresponding to the target line length, and set the programmable load to the target power curve. A3: The neutral point grounding mode module switches to one of the following modes: ungrounded, grounded via arc suppression coil, or grounded via small resistor.

[0043] It should be noted that the modules that need to control the influencing quantities in the above A1-A3 steps of the basic operating condition sequence are the adjustable line impedance module, the programmable load module, and the neutral point grounding mode module.

[0044] S500: Under basic operating conditions, the multi-influence quantity physics simulation unit starts different internal simulation modules at preset time points according to the timing control script, injects different parameters into the corresponding objects, and obtains operating data; It should be noted that, since the multi-influence physical simulation unit contains multiple simulation modules, such as the adjustable line impedance module, fault simulation module, distributed creepage / electro-erosion module, programmable load module, neutral grounding method module, and aging test module, these modules follow the timing control script settings when they are called. The implementation order in this embodiment is not limited to the implementation order of the steps of each module. The following is an example of an implementation method.

[0045] In this embodiment of the application, in step S500, under the basic operating conditions, the multi-influence quantity physics simulation unit starts different internal simulation modules at preset time points according to the timing control script, injects different parameters into the corresponding objects, and obtains operating data, including B1-B2: B1: The multi-influence physical simulation unit starts the aging test module and / or the distributed creepage / electro-erosion module at preset time points according to the timing control script, applies the corresponding environmental parameters to the designated primary equipment, and obtains the changed state of the equipment; It should be noted that this section contains the electrothermal aging test sequence and the insulation degradation test sequence, which are used to accelerate the simulation of performance degradation of equipment such as switchgear, cable heads, and insulators caused by electrical and thermal environmental factors during years of operation. The controllable influence quantity modules for the electrothermal aging test sequence and the insulation degradation test sequence include: adjustable line impedance module, programmable load module, and aging test module.

[0046] Specifically, after the basic operating condition sequence has been applied, the electrothermal aging test sequence first controls the aging test module to generate the corresponding thermal effect to simulate thermal fatigue during long-term operation. The insulation degradation test sequence controls the aging test module to apply humid, condensation, and salt spray conditions.

[0047] B2: When the equipment is in a changed state, the multi-influence physical simulation unit injects faults through the fault module according to the timing control script, and obtains the composite electrical quantities of fault superposition and aging. It should be noted that this section is a fault coupling test sequence, used to comprehensively evaluate the detection, line selection, location, and isolation capabilities of relay protection devices and fault indicators for various simple, complex, and evolving faults, and to verify the accuracy of the protection equipment's operation. The prerequisite for applying the fault coupling test sequence is a basic operating condition sequence based on an established distribution network real-world scenario. The control modules required for the fault coupling test sequence include: an adjustable line impedance module, a programmable load module, a neutral point simulation system, and a fault simulation module.

[0048] In this application embodiment, in step S500, B2: the multi-influence quantity physical simulation unit injects faults through the fault module according to the timing control script, including: injecting single or evolving faults; Among them, the evolutionary fault includes the following sequence: first, a single-phase high-resistance ground is injected, which continues for a preset time and then upgrades to a two-phase short circuit, and then to a three-phase short circuit.

[0049] Specifically, a single fault could be a metallic grounding of phase A, a short circuit between phases B and C, etc.

[0050] S600: The communication interference simulation unit injects interference into the power distribution automation communication link according to the timing control script, and obtains a secondary message accompanied by communication abnormality; In one optional implementation, while the S500 injects a fault, the switching of a large-capacity adjustable load can be controlled to simulate the start / stop conditions of a large user load, and the S600 control communication interference module can be implemented to inject interference such as delay, interruption, and packet loss into the communication link of the systemic protection device, so as to test the anti-interference capability of the distribution network protection device under complex fault environments.

[0051] In another optional implementation, a power quality disturbance test sequence can be set to test the stable operation capability of the power quality monitoring equipment, the automatic voltage regulator, and the system itself; the required controllable influence modules include: line impedance, adjustable load, and neutral point simulation system.

[0052] Alternatively, a load mutation sequence can be set, and the adjustable load can be programmed to be switched on or off in a stepwise manner to simulate the impact of large industrial users' start-up and shutdown on system voltage and frequency.

[0053] Alternatively, for a low-voltage sequence at the end of the line, first set the line impedance to the maximum value, and then set it to full power operation according to the adjustable load capacity configured in the real distribution network field, in order to simulate the low-voltage operation of the line caused by the full power operation of the high-power load at the end under the power supply conditions of a long transmission line.

[0054] It can also be a communication and control anti-interference test sequence, used to verify the communication reliability and network security resilience of the DTU and FTU of the distribution network automation system; the required control quantity modules include: communication interference module, fault simulation module, and programmable load module.

[0055] The simulation scenarios and practical problems solved by the above sequences are shown in Table 1; Table 1: Simulation scenarios and practical problems solved for some sequences

[0056] S700: Collects all monitoring and operational data and messages, and integrates them to generate experimental data that includes the entire process of the coupled evolution of multiple influencing factors.

[0057] In this embodiment, step S700 further includes: analyzing the accuracy of the tested device's operation based on the fused test data, reconstructing the fault evolution chain, and evaluating the performance of the equipment and system. Based on the analysis results, and automatically adjusting the influence parameters or timing of the timing control script, iterative experiments are conducted to achieve stability testing.

[0058] It should be noted that the entire process involves synchronously collecting primary electrical quantities and secondary messages and integrating and analyzing them to form a time-stamped "fault-aging-communication" coupled full-chain data. This directly yields a quantitative indicator of the accuracy of the tested device's actions in complex scenarios, providing objective data support for quantitative equipment assessment, algorithm iteration optimization, and system resilience evaluation.

[0059] In summary, this invention presents a method for testing the coupling and interference configuration of multiple influencing quantities in a real-world distribution network. This method deeply couples multiple key influencing quantities of the distribution network, such as line impedance, fault type, equipment aging, neutral point operation mode, load characteristics, insulation pollution, and communication channel status. It achieves deep temporal, logical, and electrical coupling and coordinated control among these influencing quantities, and can dynamically simulate the evolution of distribution network faults, operation mode switching, and long-term aging effects. This method completely changes the limitations of traditional distribution network testing modes, which are singular and detached from complex realities. It provides an indispensable core testing method for improving the equipment reliability, system resilience, and technological innovation capabilities of smart distribution networks.

[0060] Overall, it solves the pain points of traditional distribution network testing, which suffers from single influencing factors and inability to simulate complex coupled scenarios. It achieves programmable coupling of the time sequence of multi-dimensional influencing factors such as electrical, environmental, aging, and communication factors, with high controllability and flexibility. All interference injections are carried out under controlled conditions, avoiding the risk of permanent damage to core equipment and real-world scenarios in the distribution network. It can be used not only for the network access testing of distribution network equipment, but also for cutting-edge fields such as the verification of new protection algorithms, system resilience assessment, and predictive maintenance strategy research, providing strong data support and decision support for the planning, operation, and maintenance of smart distribution networks.

[0061] Example 3 illustrates a schematic scheme for a method of testing the coupling and interference configuration of multiple influence quantities in a true-world distribution network. It should be noted that the technical solution of this system for testing the coupling and interference configuration of multiple influence quantities in a true-world distribution network is based on the same concept as the technical solution of the method described above. Details not described in detail in this example can be found in the description of the method described above.

[0062] This embodiment also provides another distribution network real-world multi-influence quantity coupling and interference configuration test system, including: The scenario sequence control unit is used to customize test scenarios, set parameters, execute control commands, and monitor data throughout the entire process. The multi-influence quantity physical simulation unit is used to simulate the influence quantities of a real test field, including: adjustable line impedance module, fault simulation module, distributed creepage / electro-erosion module, programmable load module, neutral grounding method module, and aging test module; The communication interference simulation unit is used to simulate abnormal operating conditions in the communication lines of intelligent equipment in the power distribution network.

[0063] It should be noted that the simulation modules in the multi-influence quantity physics simulation unit can all be implemented using simulators; The adjustable impedance simulator is used to simulate the length of a 10kV line, which can meet the requirements of different power supply radii under basic operating conditions.

[0064] The fault simulator can simulate single-phase grounding faults, short-circuit faults, and open-circuit faults, and supports remote fault parameters.

[0065] The aging test simulator is used to simulate circuit aging and can simulate test environments such as high temperature, high humidity, and irradiation aging.

[0066] Distributed creepage / electro-erosion simulator device: Installed at insulators or cable joints, it accelerates the simulation of insulation aging process through controlled moisture generation and dirt spraying.

[0067] Programmable load disturbance source: used to simulate severe load fluctuations, motor starting impacts, etc., to form background disturbances.

[0068] Communication interference simulation unit: Connected in series or coupled to the optical fiber or Ethernet communication link of the relay protection and power distribution automation system, it can inject abnormal communication conditions such as delay, packet loss, and data frame errors.

[0069] This embodiment also provides a computer device applicable to a real-world field multi-influence quantity coupling and interference configuration test of a power distribution network, comprising: a memory and a processor; the memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions to implement the method for implementing a real-world field multi-influence quantity coupling and interference configuration test of a power distribution network as proposed in the above embodiment.

[0070] This embodiment also provides a storage medium storing a computer program that, when executed by a processor, implements a method for testing the coupling and interference configuration of multiple influence variables in a true-world distribution network as proposed in the above embodiments.

[0071] The storage medium proposed in this embodiment and the method for implementing a true field multi-influence quantity coupling and interference configuration test method for power distribution networks proposed in the above embodiments belong to the same inventive concept. Technical details not described in detail in this embodiment can be found in the above embodiments, and this embodiment has the same beneficial effects as the above embodiments.

[0072] Example 4: Based on the above examples, this example provides an exemplary application of a method for testing the coupling and interference configuration of multiple influence variables in a real-world distribution network, which verifies the feasibility and beneficial effects of the present invention.

[0073] Scenario: Simulate a 10km-long rural radial power distribution network in a southwestern region. This line has been in operation for 3 years and exhibits signs of aging. It also frequently experiences thunderstorms from June to August. At the end of the line is a large pig farm with a transformer capacity of 200kVA and a power load of 250kW, causing the line to operate under overload conditions for an extended period. Due to the mountainous and forested terrain of southwestern China, the overhead lines are frequently constructed through forests, resulting in single-phase grounding faults caused by tree branches. Furthermore, lightning strikes during thunderstorms can interfere with communication channels, causing communication problems between the FTU terminal and the master station. The reliability of the power distribution network needs to be tested under this scenario.

[0074] Deployment: such as Figure 2 As shown, an adjustable impedance fault simulator is deployed on an overhead feeder of a 10kV real-world field to simulate the line length; a distributed creepage / electro-erosion simulation device is deployed at the pole insulator installation location of the overhead line; a section of overhead cable in the overhead line is connected to an aging test device; a fault simulation module is connected in the overhead line; and a communication interference simulation device is connected in series on the communication circuit between the distribution terminal unit (FTU) and the distribution master station.

[0075] Configuration: Refer to Figure 3 As shown, on the drag-and-drop visual timing editor human-machine interface of the scene sequence control unit, specific parameters are set for each influencing quantity device. In the interference track, impedance values ​​and time parameters corresponding to the line length are set for the adjustable impedance simulator. In the interference track, parameters and time parameters for the ungrounded / arc suppression coil grounded / low-resistance grounded mode of the neutral point grounding module are set. In the interference track, active and reactive power values, as well as load variation curves and time parameters, are set for the programmable load module. Moisture, insulation contamination parameters, and time parameters are set for the distributed creepage / electro-erosion module. Temperature, humidity, irradiance parameters, and time parameters are set for the aging test module. Packet loss rate and delay time are set for the communication channel interference simulator in the interference track. Fault parameters and time parameters conforming to actual distribution network fault scenarios are set for the fault module in the interference track. After completing the parameter compilation for each influencing quantity module in the timing editor, the system automatically generates a timing control script. The script can precisely set and control the start, stop, and parameter change times of each influencing quantity device.

[0076] Specifically, refer to Figure 3As shown, the following parameters are set in the scene sequence control unit: ① 0-120s: First, the system grounding method is set to an ungrounded system; the line length parameter of the line impedance simulation device is set to 10km; the line impedance simulation device is put into operation at 0s and runs continuously until 120s; at 0s, the programmable load device system load is set to 250kW active power and runs continuously until 120s; ② At 10s, the line aging condition is simulated, the aging chamber temperature is set to 80℃, and it runs continuously until 120s; ③ At 20s, the thunderstorm weather is simulated. Under the following conditions: ① Set the aging chamber humidity to 100℃ and run continuously for 120 seconds; ② Set the creepage / electro-erosion module parameters to 100% humidity and Class I insulation pollution (humus) level of the insulator, and run continuously for 120 seconds; ③ At 30 seconds, simulate a single-phase ground fault of phase A with a ground fault resistance of 5000Ω, and run continuously for 120 seconds; ④ At 35 seconds, start the communication interference simulator, set intermittent communication interruptions (random intervals of several hundred milliseconds to 1 second) to simulate communication interference under lightning strikes, and run continuously for 120 seconds.

[0077] Execution and Monitoring: The typical mountainous rural power distribution network reliability test sequence under severe weather conditions was executed, and testing commenced. The 10kV power distribution network simulation field was brought to normal operating status, and the power distribution network master station system began monitoring the simulation field's operational data. The scenario execution program of the scenario sequence control unit was initiated, and the program automatically triggered the actions of each device according to the timing script. The fault recorder, power quality analyzer, and message recorder of the simulation field were simultaneously activated to comprehensively monitor the operational data of the primary and secondary systems. Communication messages between the distribution automation master station and the FTU, as well as the protection action outputs of the FTU, were also recorded.

[0078] Analysis: By analyzing the recorded fault waveforms and communication messages, the following judgments can be made regarding the distribution network in this scenario: Can the power supply stability be reliably guaranteed under overload operation and line aging conditions? Can the primary and secondary distribution equipment in the lines withstand the voltage and current under overload and aging conditions? Can the FTU reliably start under single-phase high-resistance grounding conditions? Under severe communication interruption interference, can fault information be successfully uploaded to the distribution master station to ensure timely transmission of relevant distribution line fault information? Through comprehensive analysis and summarization of test results, the anti-interference performance of the distribution network system can be fully evaluated, and improvements and optimizations can be made to address weaknesses, thereby enhancing the operational resilience of the distribution network.

[0079] From the above description of the implementation methods, those skilled in the art will clearly understand that the present invention can be implemented using software and necessary general-purpose hardware. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk, or optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of the various embodiments of the present invention.

[0080] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A power distribution network real-type field multi-influence quantity coupling and interference configuration test method, characterized in that, The method comprises the following steps: Constructing a power distribution network experimental evolution scene, which is divided into multiple influence quantity nodes and interference injection nodes; Receiving user operations and parameter settings on the multiple influence quantity nodes and interference injection nodes through a graphical time sequence editor of a scene sequence control unit, and generating a time sequence control script; According to the time sequence control script, issuing a synchronous trigger instruction to a multi-influence quantity physical simulation unit and a communication interference simulation unit; The multi-influence quantity physical simulation unit adjusts the parameters of the adjustable line impedance module, the programmable load module and the neutral point grounding mode module at the corresponding time points in response to the instruction, establishes a basic operating condition consistent with the target power distribution network topology, and starts the internal different simulation modules at the preset time points according to the time sequence control script to inject different parameters to the corresponding objects to obtain operating data. The communication interference simulation unit injects interference into the power distribution automation communication link according to the time sequence control script to obtain secondary messages accompanied by communication anomalies. Collect all the monitored operating data and messages, and fuse to generate test data containing the whole process of multi-influence quantity coupling evolution. The scene sequence control unit has a built-in standardized interference parameter template library, and the user can automatically fill in the default intensity parameters and duration of the corresponding nodes by selecting a preset template.

2. The method of claim 1, wherein the method further comprises: determining a plurality of impact quantities of the power distribution network; and determining a plurality of coupling and interference configurations of the power distribution network. Adjusting the parameters of the adjustable line impedance module, the programmable load module and the neutral point grounding mode module at the corresponding time points to establish a basic operating condition consistent with the target power distribution network topology, including:

3. The method of claim 2, wherein the method further comprises: determining the coupling and interference configuration of the power distribution network based on the plurality of impact quantities. According to the test requirements, set the corresponding line impedance parameters according to the target power distribution network topology; Through the adjustable line impedance module and the programmable load module, inject resistive, inductive and capacitive loads of corresponding sizes, set the adjustable line impedance to the impedance value corresponding to the target line length, and set the programmable load to the target power curve; The neutral point grounding mode module is switched to one of the non-grounded, arc suppression coil grounded or small resistance grounded mode. Under the basic operating condition, the multi-influence quantity physical simulation unit starts the internal different simulation modules at the preset time points according to the time sequence control script, injects different parameters to the corresponding objects, and obtains operating data, including:

4. The method of claim 3, wherein the method further comprises: The multi-influence quantity physical simulation unit starts the aging test module and / or the distributed creepage / corrosion module at the preset time points according to the time sequence control script, applies corresponding environmental parameters to the specified primary equipment, and obtains the state change of the equipment; Under the state change of the equipment, the multi-influence quantity physical simulation unit injects faults through the fault module according to the time sequence control script to obtain composite electrical quantities superimposed with faults and aging. The multi-influence quantity physical simulation unit injects faults through the fault module according to the time sequence control script, including injecting single or evolving faults; 5. The method of claim 4, wherein the method further comprises: determining the coupling and interference configuration of the power distribution network based on the plurality of impact quantities. The evolving fault includes a time sequence process of first injecting a single-phase high-resistance grounding, upgrading to a two-phase short circuit after a preset time, and then upgrading to a three-phase short circuit. ​ The time sequence control script contains the trigger time, duration and intensity parameters of each node.

6. The method of claim 5, wherein the method further comprises: Further comprising:

7. The method of claim 6, wherein the method further comprises: According to the fusion generated test data, analyze the action accuracy of the measured device, and automatically adjust the time sequence control script for iterative testing. Comprising:

8. A power distribution network real-time field multi-influence quantity coupling and interference configuration test system, applying the method of any one of claims 1-7, characterized in that, ​ A scene sequence control unit is configured to customize a test scene, set parameters, execute control instructions, and monitor overall process data. A multi-influence physical simulation unit is configured to implement simulation of influencing quantities in a real-type test field, and includes an adjustable line impedance module, a fault simulation module, a distributed creeping / crevice corrosion module, a programmable load module, a neutral grounding mode module, and an aging test module. A communication interference simulation unit is configured to simulate abnormal working conditions in a communication line of a power distribution network intelligent device.

9. A computer device, comprising: The application relates to a power distribution network real-type field multi-influence coupling and interference configuration test method and device. The application relates to a power distribution network real-type field multi-influence coupling and interference configuration test method and device. The application relates to a power distribution network real-type field multi-influence coupling and interference configuration test method and device.

10. A computer-readable storage medium, characterized in that, ​

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