A power distribution network electrical primary equipment test bench

Abstract

This utility model discloses a test bench for primary electrical equipment in power distribution networks, belonging to the technical field of electrical test benches. The test bench includes a cabinet. The front of the cabinet integrates a module plug-in compartment and an industrial control host. The cabinet surface integrates an electrical interface group. The module plug-in compartment connects to a hot-swappable functional module group via a 26-pin composite interface. This interface integrates a high-voltage output path, a fiber optic bus communication channel, and spring-loaded pin contacts. The industrial control host has a built-in AI diagnostic unit and a test template database. This utility model integrates high-voltage output, fiber optic communication, and power supply paths through the pin composite interface of the module plug-in compartment, supporting hot-swapping and cascading of high-voltage generator modules, high-current generator modules, and standard power supply modules. Combined with the industrial control host's dynamic scanning of module IDs to generate a topology diagram, it can quickly complete basic or integrated configuration reconfiguration, solving the problem of complex wiring in traditional test bench cabinets.

Description

Technical Field

[0001] This utility model belongs to the technical field of electrical test benches, specifically relating to a test bench for primary electrical equipment in power distribution networks. Background Technology

[0002] Smart distribution networks are a core means of improving urban power supply reliability and an inevitable direction for the modernization of power systems. In recent years, the scale of smart distribution network construction across the country has continued to expand, with long project cycles, a large number of devices, and covering key primary equipment such as pole-mounted switches, ring main units, and distribution terminals. To ensure equipment quality and grid safety, each new piece of equipment must undergo rigorous handover testing before installation.

[0003] At present, conventional tests adopt a modular approach with separate equipment. Operators need to connect the secondary ports of the device under test to independent instruments such as the transformer characteristic tester and the high voltage generator one by one using test clips, and then perform the test step by step.

[0004] However, the number of test ports is limited and the markings are unclear. Staff often rely on memory rather than drawings to operate. Incorrect connection of leads may lead to incorrect connection of secondary terminals, causing short circuits in the equipment and burning out the current transformer or circuit breaker coils. Furthermore, during the CT volt-ampere characteristic test, it is necessary to switch the wiring between the high-voltage generator, the high-current source, and the standard meter 5 times. The operation process is cumbersome and affects the efficiency of the experiment. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a test bench for primary electrical equipment in power distribution networks.

[0006] The technical solution adopted to solve the above-mentioned technical problems is: to provide a test bench for primary electrical equipment of power distribution network, including a cabinet, wherein the front of the cabinet integrates a module plug-in compartment and an industrial control host, and the cabinet table integrates an electrical interface group, characterized in that: The module plug-in compartment connects to a hot-swappable functional module group via a 26-pin composite interface. This interface integrates a high-voltage output path, a fiber optic bus communication channel, and spring-loaded pin contacts, supporting cascaded power supply and synchronous data transmission for high-voltage generator modules, high-current generator modules, and standard power supply modules. The industrial control host has a built-in AI diagnostic unit and test template database. It can dynamically generate a system topology diagram by scanning module IDs, and realize basic and integrated two-level configuration reconstruction. The electrical interface assembly includes an anti-misplugging aviation socket, magnetic quick-connect terminals, and gold-plated copper pillar terminals for direct connection to the test sample.

[0007] The above technical solution integrates high-voltage output, fiber optic communication, and power supply paths through the 26-pin composite interface of the module plug-in compartment, supporting hot-swapping and cascading of high-voltage generator modules, high-current generator modules, and standard power supply modules. With the industrial control host dynamically scanning module IDs to generate a topology diagram, basic or integrated configuration reconfiguration can be quickly completed, solving the problem of complex wiring in traditional test bench cabinets.

[0008] Furthermore, the fiber optic bus communication channel supports a data transmission rate of ≥1Gbps, and the high-voltage output path carries a voltage of ≥10kV AC / DC.

[0009] The above technical solution integrates a fiber optic bus communication channel into a composite interface, supporting a data transmission rate of ≥1Gbps. This ensures that the ≥10kV AC / DC voltage signal output by the high-voltage generator module is transmitted synchronously and at high speed with vibration and temperature data, providing a reliable data foundation for early warning of mechanical degradation.

[0010] Furthermore, the cabinet integrates a security protection system, including: Overcurrent fuse connected in series in the high-voltage output circuit; Temperature sensor mounted on a 26-pin composite interface contact; Fuse control program: When the temperature is greater than 85°C or the current surge rate is greater than 20%, the power supply to the module is cut off via the Modbus bus.

[0011] The above technical solution integrates overcurrent fuses, temperature sensors, and Modbus fuse programs into a safety protection system, forming a hardware and software collaborative protection mechanism to reduce the probability of high-voltage module thermal failure.

[0012] Furthermore, the two-level configuration reconfiguration includes: Basic configuration: The high-voltage generator module and the standard power supply module work independently, and the output path is switched by the industrial control host; Integrated configuration: The high-voltage generator module and the high-current generator module are connected in parallel.

[0013] The above technical solution solves the problem of adapting to multiple testing scenarios by dynamically switching between basic and integrated configurations via an industrial control host. The basic configuration supports precision withstand voltage tests below 10kV, while the integrated configuration achieves synchronous output of 10kV / 1000A, meeting the requirements for short-circuit closing tests.

[0014] Furthermore, the high-voltage generator module adopts a split voltage multiplier structure, supports 0-10kV AC / DC output and can be expanded to >200kV; The high-current generator module uses a toroidal transformer to output 0-1000A AC / DC current with heat loss <3kW.

[0015] The above technical solution utilizes a split voltage multiplier structure for the high-voltage generator module. By cascading the modules, the 0-10kV output is extended to >200kV. The toroidal transformer structure of the high-current generator module, when cascaded, supports 200kV / 1000A composite operating conditions, covering the full parameter testing requirements of GIS equipment.

[0016] Furthermore, the AI ​​diagnostic unit provides early warnings of equipment mechanical degradation by comparing temperature rise curves in historical test data.

[0017] Through the above technical solution, the AI ​​diagnostic unit can provide early warning of equipment mechanical degradation by comparing the temperature rise curve in historical test data.

[0018] Furthermore, a copper-plated grounding post is detachably installed on one side of the cabinet by bolts. Its end is hemispherical and the grounding resistance is <0.1Ω, which is used to discharge static electricity from the test bench.

[0019] The above technical solution uses a hemispherical design at the end of the copper-plated grounding post, which can be detachably installed on the side wall of the cabinet with bolts. The grounding resistance is <0.1Ω, and its low impedance characteristics can instantly discharge the electrostatic charge generated by the 10kV test.

[0020] The beneficial effects of this utility model are as follows: The 26-pin composite interface of the module plug-in compartment integrates high-voltage output, fiber optic communication and power supply path, supporting hot-swapping and cascading of high-voltage generator modules, high-current generator modules and standard power supply modules. With the industrial control host dynamically scanning module IDs to generate topology diagrams, basic or integrated configuration reconfiguration can be completed quickly, solving the problem of complex wiring in traditional test bench cabinets.

[0021] The fiber optic bus communication channel is integrated into the composite interface, supporting a data transmission rate of ≥1Gbps. This ensures that the ≥10kV AC / DC voltage signal output by the high-voltage generator module is transmitted synchronously and at high speed with vibration and temperature data, providing a reliable data foundation for early warning of mechanical degradation.

[0022] The safety protection system integrates overcurrent fuses, temperature sensors, and Modbus fuse programs to achieve a 10-millisecond response to sudden current changes (>20%) or overheating (>85℃). The copper-plated grounding post has a hemispherical design at the end, with a grounding resistance of <0.1Ω. It works in conjunction with the gold-plated copper post terminals of the cabinet to form an electrostatic discharge network, ensuring experimental safety. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of a test bench for primary electrical equipment in a power distribution network according to this utility model; Figure 2 This is a three-dimensional disassembled structural diagram of a test bench for primary electrical equipment in a power distribution network according to this utility model; Figure 3 for Figure 2 Enlarged view of the partial three-dimensional structure of A in the middle; Figure 4 for Figure 2 Enlarged view of the partial three-dimensional structure of B.

[0024] Attached reference numerals: 1. Cabinet; 2. Module plug-in compartment; 201. 26-pin composite interface; 3. Industrial control host; 4. High voltage generator module; 5. High current generator module; 6. Standard power supply module; 7. Electrical interface group; 701. Anti-misplugging aviation socket; 702. Magnetic quick-connect terminal; 703. Gold-plated copper post terminal; 801. Overcurrent fuse; 802. Temperature sensor; 9. Copper-plated grounding post. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] like Figure 1-4 As shown, this embodiment of a power distribution network primary electrical equipment test bench includes a cabinet 1. The front of the cabinet 1 integrates a module plug-in compartment 2 and an industrial control host 3. The tabletop of the cabinet 1 integrates an electrical interface group 7. The module plug-in compartment 2 connects to a hot-swappable functional module group via a 26-pin composite interface 201. This interface integrates a high-voltage output path, a fiber optic bus communication channel, and spring-loaded pin contacts. The fiber optic bus runs through the interior of the cabinet 1. The fiber optic bus communication channel supports a data transmission rate of ≥1Gbps. The high-voltage output path carries a voltage of ≥10kV AC / DC and supports cascaded power supply and synchronous data transmission for a high-voltage generator module 4, a high-current generator module 5, and a standard power supply module 6. The industrial control host 3 has a built-in AI diagnostic unit and test template database. It dynamically generates a system topology diagram by scanning module IDs, achieving basic and integrated dual-level configuration reconfiguration. The basic configuration allows the high-voltage generator module 4 and the standard power supply module 6 to work independently, with the industrial control host 3 switching the output path. The integrated configuration allows the high-voltage generator module 4 and the high-current generator module 5 to be connected in parallel.

[0027] Insert the high-voltage generator module 4, high-current generator module 5, and standard power supply module 6 into module insertion compartment 2. Physical connection is achieved through the spring-loaded contacts of the 26-pin composite interface 201. The interface simultaneously integrates high-voltage power supply (≥10kV AC / DC), fiber optic bus communication (≥1Gbps), and cascaded power supply paths. The industrial control host 3 scans the module ID chip, generating a dynamic topology diagram within 3 seconds and automatically matching preset schemes in the test template database, such as the basic 4+6 module parallel connection and the integrated 4+5 module parallel connection. The user selects the test mode, and the system controls relays to switch the parallel logic, quickly completing power reconfiguration.

[0028] Electrical interface group 7 includes an anti-misconnection aviation socket 701, a magnetic quick-connect terminal 702, and a gold-plated copper pillar terminal 703 for direct connection to test samples. Cabinet 1 integrates a safety protection system, including an overcurrent fuse 801 connected in series in the high-voltage output circuit, a temperature sensor 802 mounted on the contacts of the 26-pin composite interface 201, and a fuse control program. When the fuse control program detects a temperature > 85℃ or a current mutation rate > 20%, it cuts off the module power supply via the Modbus bus, forming a hardware and software collaborative protection mechanism to reduce the probability of high-voltage module thermal failure. High-voltage generator module 4 adopts a split voltage multiplier structure, supports 0-10kV AC / DC output and can be expanded to >200kV, with a maximum of 4 modules cascaded and voltage equalization design. The cascaded modules are insulated with epoxy resin vacuum casting. High-current generator module 5 uses a toroidal transformer, outputting 0-1000A AC / DC current with heat loss < 3kW. By cascading modules, the high-voltage output can be extended to >200kV. After cascading, the two modules can support 200kV / 1000A composite operating conditions, covering the full parameter testing requirements of GIS equipment.

[0029] Both the voltage multiplier unit of the high-voltage generator module 4 and the toroidal transformer core of the high-current generator module 5 have built-in temperature monitoring circuits. Data is transmitted to the AI ​​diagnostic unit via a fiber optic bus. The AI ​​diagnostic unit compares the temperature rise curves in historical test data to provide early warnings of equipment mechanical degradation and identifies abnormal fluctuations at the 10-millisecond level (such as circuit breaker operating mechanism jamming), providing early warnings of mechanical degradation 3-5 test cycles in advance. A copper-plated grounding post 9 is detachably installed on one side of cabinet 1 via bolts. The copper-plated grounding post 9 is connected to the external grounding grid, and its end is hemispherical with a grounding resistance of <0.1Ω, used to discharge static electricity from the test bench. Its low impedance characteristic can instantaneously discharge the static charge generated by the 10kV test.

[0030] The working principle of this embodiment is as follows: Before inserting the high-voltage generator module 4, the high-current generator module 5, or the standard power supply module 6, the industrial control host 3 sends a sleep command to put the module into standby mode to avoid insertion and removal arcing. The module connects to the insertion and removal compartment 2 through the spring pin contact of the 26-pin composite interface 201. The high-voltage output path (carrying ≥10kV AC / DC), the fiber optic bus channel (≥1Gbps), and the power supply path in the interface are turned on in an alternating sequence - the power supply pin is turned on last and turned off first to prevent surge current impact.

[0031] The industrial control host 3 scans the module ID chip and identifies the module type and version within 3 seconds through the OSGi dynamic loading mechanism, generating a system topology diagram. For example, in the integrated configuration (modules 4+5 in parallel), it automatically allocates cascaded power paths and loads the corresponding drivers synchronously. When the user selects a test template, the system controls the relay matrix based on the topology diagram, switches to the integrated configuration within 30 seconds, and outputs a 10kV / 1000A composite signal. The fiber optic bus transmits the vibration waveform of module 4 and the temperature data of the toroidal transformer of module 5 to the AI ​​diagnostic unit in real time. Using an LSTM model to compare with the historical fault database, it identifies anomalies at the 10-millisecond level and provides a 3-cycle early warning of mechanical degradation. The diagnostic results trigger two responses: if it is a recoverable anomaly (such as transient temperature exceeding the limit), it dynamically adjusts the module output power (±10%); if it is a serious fault (such as insulation breakdown symptoms), it initiates the fuse procedure.

[0032] The 0-10kV AC / DC basic output of the high-voltage generator module 4 is extended to >200kV through cascading four modules. The voltage equalization algorithm monitors the voltage deviation between stages in real time and adjusts the pulse width through IGBTs to suppress the deviation to <1%. When the toroidal transformer of the high-current generator module 5 outputs 0-1000A, the current ripple rate is <0.2%, which is achieved by controlling the core magnetic saturation point through PID closed-loop control. When modules 4 and 5 are cascaded, the industrial control host 3 coordinates the phase synchronization to ensure that the waveform distortion rate is <3% when 200kV high voltage and 1000A high current are superimposed.

[0033] Temperature sensor 802 is mounted on composite interface 201 contact. When it detects >85℃ or current change rate >20%, Modbus bus triggers overcurrent fuse 801 to cut off power supply within 20ms. Copper-plated grounding post 9 contacts the ground through hemispherical end to release static charge. The test sample is connected through electrical interface group 7 - anti-misinsertion aviation socket 701 keyway positioning, magnetic quick-connect terminal 702, gold-plated copper post terminal 703 and grounding post 9 form a low resistance circuit.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A test bench for primary electrical equipment in a power distribution network, comprising a cabinet (1), wherein the front of the cabinet (1) integrates a module plug-in compartment (2) and an industrial control host (3), and the tabletop of the cabinet (1) integrates an electrical interface group (7), characterized in that: The module plug-in compartment (2) is connected to a hot-swappable functional module group through a 26-pin composite interface (201). This interface integrates a high-voltage output path, a fiber optic bus communication channel, and a spring pin contact, supporting cascaded power supply and synchronous data transmission of the high-voltage generator module (4), the high-current generator module (5), and the standard power supply module (6). The industrial control host (3) has a built-in AI diagnostic unit and test template database. It dynamically generates a system topology diagram by scanning module IDs, and realizes basic and integrated two-level configuration reconstruction. The electrical interface group (7) includes an anti-misplugging aviation socket (701), a magnetic quick-connect terminal (702), and a gold-plated copper pillar terminal (703) for direct connection to the test sample.

2. The test bench for primary electrical equipment in a power distribution network according to claim 1, characterized in that, The fiber optic bus communication channel supports a data transmission rate of ≥1Gbps, and the high-voltage output path carries a voltage of ≥10kV AC / DC.

3. The test bench for primary electrical equipment in a power distribution network according to claim 2, characterized in that, The cabinet (1) integrates a security protection system, including: An overcurrent fuse (801) connected in series in the high-voltage output circuit. Temperature sensor (802) mounted on the contacts of a 26-pin composite interface (201); Fuse control program: When the temperature is greater than 85°C or the current surge rate is greater than 20%, the power supply to the module is cut off via the Modbus bus.

4. The test bench for primary electrical equipment in a power distribution network according to claim 3, characterized in that, The two-level configuration reconfiguration includes: Basic configuration: The high voltage generator module (4) and the standard power supply module (6) work independently, and the output path is switched by the industrial control host (3); Integrated configuration: The high voltage generator module (4) is connected in parallel with the high current generator module (5).

5. A test bench for primary electrical equipment in a power distribution network according to claim 4, characterized in that, The high voltage generator module (4) adopts a split voltage multiplier structure, supports 0-10kV AC / DC output and can be expanded to >200kV; The high current generator module (5) uses a toroidal transformer to output 0-1000A AC / DC current with heat loss <3kW.

6. The test bench for primary electrical equipment in a power distribution network according to claim 5, characterized in that, The AI ​​diagnostic unit provides early warnings of equipment mechanical degradation by comparing temperature rise curves in historical test data.

7. A test bench for primary electrical equipment in a power distribution network according to claim 6, characterized in that, A copper-plated grounding post (9) is detachably installed on one side of the cabinet (1) by bolts. Its end is hemispherical and the grounding resistance is <0.1Ω, which is used to discharge static electricity from the test bench.

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