CN219833970U

CN219833970U - Power supply system for high-low voltage switch cabinet secondary equipment test

Info

Publication number: CN219833970U
Application number: CN202320002526.8U
Authority: CN
Inventors: 尹靖虎; 刘纯纯; 韩烈红
Original assignee: Shenzhen Excesys Technology Co ltd
Current assignee: Shenzhen Excesys Technology Co ltd
Priority date: 2023-01-03
Filing date: 2023-01-03
Publication date: 2023-10-13
Anticipated expiration: 2033-01-03

Abstract

The utility model discloses a power supply system for a secondary equipment test of a high-low voltage switch cabinet, which comprises an operation console, a programmable controller, an automatic wiring output device, an automatic wiring conversion device and a plurality of input power supplies, wherein the control ends of the input power supplies are respectively connected with voltage control signal input ends corresponding to the operation console, and the output ends of the input power supplies are respectively connected with voltage input ends corresponding to the automatic wiring output device; the plurality of input ends of the automatic wiring conversion device are connected with the corresponding output ends of the automatic wiring output device, and the control end of the automatic wiring conversion device and the control end of the automatic wiring output device are respectively connected with the corresponding control signal output ends of the programmable controller; the plurality of output ends of the automatic wiring conversion device respectively receive the input ends of the test equipment. The utility model can set the test wiring mode in advance, automatically finish test wiring, reduce manual wiring errors and workload of personnel, and improve test efficiency.

Description

Power supply system for high-low voltage switch cabinet secondary equipment test

[ technical field ]

The utility model relates to a high-low voltage switch cabinet secondary equipment test, in particular to a power supply system for the high-low voltage switch cabinet secondary equipment test.

[ background Art ]

The high-low voltage switch cabinet is an electric device, the external line firstly enters the main control switch in the cabinet and then enters the sub-control switch, and each shunt is arranged according to the requirements, such as an instrument, an automatic control, a motor magnetic switch, various alternating current contactors and the like. The test power supply system of the high-low voltage switch cabinet is suitable for the power-on detection and debugging of the loops of the AC/DC voltage, current, control, signal, wiring control and the like of the 380/220V-110 KV complete set high-low voltage switch cabinet secondary equipment. The secondary devices include low-voltage electrical devices other than high-voltage buses in a switchgear, such as meters, buttons, ground posts, wires and various transfer switches, contactors, relays, and the like

The existing debugging power supply has the defects of few output types, troublesome control and wiring, imperfect protection function, inconvenient debugging, low test efficiency, complex operation, poor safety and certain safety risk for operators.

The high-low voltage switch cabinet debugging power supply used in the current market is mainly composed of independent power supply modules, is manually controlled independently, requires manual wiring according to switch cabinet tests, is disordered in field wiring, is inconvenient to debug, is low in test efficiency, is complex to operate, is poor in safety, and has a certain safety risk for operators. Moreover, the test results are manually input or manually filled in the test report, the inquiry is inconvenient, the report is saved, the test systematicness is relatively poor, an automatic artificial intelligence test mode is not provided, and experienced testers are required to operate and judge the test results.

[ summary of the utility model ]

The utility model aims to solve the technical problem of providing a power supply system for a secondary equipment test of a high-low voltage switch cabinet, which is high in wiring and test efficiency.

In order to solve the technical problem, the utility model adopts the technical scheme that the power supply system for the secondary equipment test of the high-low voltage switch cabinet comprises an operation console, a programmable controller, an automatic wiring output device, an automatic wiring conversion device and an input power supply, wherein the input power supply comprises a three-phase constant current source, a three-phase voltage source, a single-phase voltage source and a plurality of direct-current voltage sources, and the plurality of direct-current voltage sources have different output voltages; the control end of the three-phase constant current source, the control end of the three-phase voltage source, the control end of the single-phase voltage source and the control end of the direct-current voltage source are respectively connected with the voltage control signal input end corresponding to the operation console, and the output end of the three-phase constant current source, the output end of the three-phase voltage source, the output end of the single-phase voltage source and the output end of the direct-current voltage source are respectively connected with the voltage input end corresponding to the automatic wiring output device; the plurality of input ends of the automatic wiring conversion device are connected with the corresponding output ends of the automatic wiring output device, and the control end of the automatic wiring conversion device and the control end of the automatic wiring output device are respectively connected with the corresponding control signal output ends of the programmable controller; the plurality of output ends of the automatic wiring conversion device respectively receive the input ends of the test equipment.

The power supply system comprises at least 4 first switch assemblies and a first wiring board, wherein the first switch assemblies comprise a plurality of first switches, and second ends of the first switches of the same first switch assemblies are connected together; the first wiring board comprises first input pins and first output pins, the number of the first input pins is the same as that of the first switch assemblies, the first input pins are connected with the corresponding first output pins, and the second ends of the first switches of the first switch assemblies are connected with the corresponding first input pins of the first wiring board; three output pins of the three-phase constant current source are respectively connected with the first ends of the first switches corresponding to the three first switch components, 4 output pins of the three-phase voltage source are respectively connected with the first ends of the first switches corresponding to the 4 first switch components, two output pins of the single-phase voltage source are respectively connected with the first ends of the first switches corresponding to the two first switch components, and two output pins of the direct-current voltage source are respectively connected with the first ends of the first switches corresponding to the two first switch components; the control end of the first switch is connected with the programmable controller.

The power supply system comprises at least 4 second switch assemblies and a second wiring board, wherein the second switch assemblies comprise a plurality of second switches, and first ends of the second switches of the same second switch assemblies are connected together; the second wiring board comprises second input pins and second output pins, the number of the second input pins is the same as that of the second switch assemblies, and the second input pins are connected with the corresponding second output pins; the first end of a second switch of the second switch assembly is connected with a second output pin corresponding to the second wiring board; the second input pin of the second wiring board is connected with the first output pin corresponding to the first wiring board; the control end of the second switch is connected with the programmable controller.

In the above power supply system, the first switch assembly includes the first grounding switches having the same number as the first switches, the first wiring board includes the first grounding pins, the first ends of the first grounding switches are connected with the first ends of the corresponding first switches, and the second ends of the first grounding switches are connected with the first grounding pins of the first wiring board; the second switch assembly comprises second grounding switches with the same number as the second switches, the second wiring board comprises second grounding pins, the second ends of the second grounding switches are connected with the second ends of the corresponding second switches, and the first ends of the second grounding switches are connected with the second grounding pins of the second wiring board; the control end of the first grounding switch and the control end of the second grounding switch are respectively connected with the programmable controller.

The three-phase constant current source comprises a power module, a waveform generator, a pre-amplifying circuit, a three-phase power amplifier circuit and a three-phase constant current feedback circuit, wherein the waveform generator comprises a CPU, a 3-path DA converter and a clock signal generator; the input end of the power supply module is connected with a single-phase 220V alternating current power supply, and the three output ends of the power supply module are respectively connected with a waveform generator, a pre-amplifying circuit and a three-phase power amplifying circuit; the output end of the 3-path DA converter is connected with the input end of the pre-amplifying circuit, and the output end of the pre-amplifying circuit is connected with the input end of the three-phase power amplifying circuit; the input end of the three-phase constant current feedback circuit is connected with the feedback signal output end of the three-phase power amplifier circuit, and the output end of the three-phase constant current feedback circuit is connected with the feedback signal input end of the pre-amplifier circuit; the control signal input end of the CPU is connected with the industrial personal computer of the operation console.

The power supply system comprises a three-phase voltage source, a three-phase voltage source and a three-phase voltage source, wherein the three-phase voltage source comprises a programmable variable frequency power supply, a three-phase closing contactor, a three-phase current transformer and a three-phase multifunctional electric parameter meter; the input end of the programmable variable frequency power supply is connected with a three-phase power supply, and the control end of the programmable variable frequency power supply is connected with an industrial personal computer of an operation console; the three-phase output end of the programmable variable frequency power supply is connected with three output pins of a three-phase voltage source through three contacts of a three-phase closing contactor and three primary windings of a three-phase current transformer respectively, and a ground wire of the programmable variable frequency power supply is connected with a ground pin of the three-phase voltage source; three secondary windings of the three-phase current transformer are respectively connected with three-phase current sampling signal input ends of the three-phase multifunctional electric parameter meter, and three output pins of the three-phase voltage source are respectively connected with three-phase voltage sampling signal input ends of the three-phase multifunctional electric parameter meter; the signal output end of the three-phase multifunctional electric parameter table is connected with the industrial personal computer of the operation console through a serial port.

The power supply system comprises a single-phase voltage source, a first single-phase multifunctional electric parameter meter and a second switching-on contactor, wherein the single-phase voltage source comprises a second switching-on contactor, an electric voltage regulator, a single-phase current transformer and a first single-phase multifunctional electric parameter meter; the live wire of the output end of the electric voltage regulator is connected with the output pin of the live wire of the single-phase voltage source through the primary winding of the single-phase current transformer, and the zero line of the output end of the electric voltage regulator is connected with the grounding pin of the single-phase voltage source; the positive rotating terminal and the reverse rotating terminal of the electric voltage regulator motor are respectively connected with a live wire of the single-phase alternating current power supply through a positive switching contactor and a reverse switching contactor, and a zero wire pin of the electric voltage regulator motor is connected with a zero wire of the single-phase alternating current power supply; the control end of the forward contactor and the control end of the reverse contactor are respectively connected with the control signal output end of the operation console industrial personal computer; the secondary winding of the single-phase current transformer is connected with the current sampling signal input end of the first single-phase multifunctional electric parameter table, and the live wire output pin and the grounding pin of the single-phase voltage source are respectively connected with the voltage sampling signal input end of the first single-phase multifunctional electric parameter table; the signal output end of the first single-phase multifunctional electric parameter table is connected with the industrial personal computer of the operation console through a serial port.

The power supply system comprises a direct-current voltage source, a first single-phase multifunctional electric parameter meter and a current sampling resistor, wherein the direct-current voltage source comprises a program-controlled switch voltage source, a third switching-on contactor, a second single-phase multifunctional electric parameter meter and a current sampling resistor, and the input end of the program-controlled switch voltage source is connected with a single-phase alternating-current power supply through the third switching-on contactor; the positive electrode of the output end of the program-controlled switch voltage source is connected with the positive electrode output pin of the direct current voltage source through the current sampling resistor, and the negative electrode is connected with the negative electrode output pin of the direct current voltage source; the control end of the program-controlled switch voltage source is connected with the industrial personal computer of the operation console through a serial port, and the two ends of the current sampling resistor are respectively connected with the current sampling signal input end of the second single-phase multifunctional electric parameter table; the positive output pin and the negative output pin of the direct-current voltage source are respectively connected with the voltage sampling signal input end of the second single-phase multifunctional electric parameter table; the signal output end of the second single-phase multifunctional electric parameter table is connected with the industrial personal computer of the operation console through a serial port.

The utility model can set the test wiring mode in advance, automatically finish test wiring, reduce manual wiring errors and workload of personnel, and improve test efficiency.

[ description of the drawings ]

The utility model will be described in further detail with reference to the drawings and the detailed description.

Fig. 1 is a block diagram of a power supply system for testing secondary equipment of a high-low voltage switch cabinet according to an embodiment of the present utility model.

Fig. 2 is a block diagram of a three-phase constant current source according to an embodiment of the present utility model.

Fig. 3 is a circuit diagram of a three-phase voltage source according to an embodiment of the present utility model.

Fig. 4 is a circuit diagram of a single-phase voltage source according to an embodiment of the present utility model.

Fig. 5 is a circuit diagram of a dc voltage source according to an embodiment of the present utility model.

Fig. 6 is a circuit diagram of a dc voltage source sampling circuit according to an embodiment of the present utility model.

Fig. 7 is a circuit diagram of an automatic wiring output device according to an embodiment of the present utility model.

Fig. 8 is a circuit diagram of an automatic wire conversion device according to an embodiment of the present utility model.

Detailed description of the preferred embodiments

The structure and principle of the test power supply system of the high-low voltage switch cabinet secondary equipment are shown in fig. 1 to 8, and the test power supply system comprises an operation console, a programmable controller PLC, an automatic wiring output device, an automatic wiring conversion device and an input power supply. The input power supply comprises a three-phase constant current source (10A three-phase alternating current and direct current source), a 0-450V three-phase alternating current voltage source, a 0-250V single-phase alternating current voltage source and 4 direct current voltage sources (0-250V/14A direct current voltage source, 0-120V/30A direct current voltage source, 0-600V/62.5A direct current voltage source and 0-30V/126A direct current voltage source).

The control end of the three-phase constant current source, the control end of the 0-450V three-phase alternating current voltage source, the control end of the 0-250V single-phase alternating current voltage source and the control end of the direct current voltage source are respectively connected with the voltage control signal input end corresponding to the industrial Personal Computer (PC) of the operation console, and the output end of the three-phase constant current source, the output end of the 0-450V three-phase alternating current voltage source, the output end of the 0-250V single-phase alternating current voltage source and the output end of the direct current voltage source are respectively connected with the voltage input end corresponding to the automatic wiring output device. The plurality of input ends of the automatic wiring conversion device are connected with the corresponding output ends of the automatic wiring output device, and the control end of the automatic wiring conversion device and the control end of the automatic wiring output device are respectively connected with the corresponding control signal output ends of the Programmable Logic Controller (PLC). The plurality of output ends of the automatic wiring conversion device respectively receive the input ends of the test equipment.

According to the high-low voltage switch cabinet secondary equipment test power supply system, an industrial Personal Computer (PC) of an operation control desk controls 7 paths of alternating-current and direct-current voltages and current sources to be output to an automatic wiring output device through an RS232 interface, the industrial Personal Computer (PC) of the operation control desk controls a programmable controller (PLC) through a network port to connect a switch in the automatic wiring output device to an automatic wiring conversion device, and the industrial Personal Computer (PC) of the operation control desk controls the programmable controller (PLC) through the network port to switch an internal switch to a test position of the high-low voltage switch cabinet secondary equipment, and then the test current sources are loaded to the test position of a tested object for test.

As shown in fig. 7, the automatic wiring output device includes 6 first switch assemblies T1 to T6 including 10 first switches, and a first wiring board, and second ends of the first switches of the same first switch assembly are connected together. The first wiring board comprises 6 first input pins and 6 first output pins, and the first input pins are connected with corresponding first output pins on the first wiring board. The second ends of the first switches of the first switch assembly are connected with the first input pins corresponding to the first wiring board after being connected with each other.

When the automatic wiring output device is connected with an input power supply, three output pins of the three-phase constant current source are respectively connected with the first ends of the three first switch components corresponding to the first switches, and 4 output pins of the 0-450V three-phase alternating current voltage source are respectively connected with the first ends of the 4 first switch components corresponding to the first switches. Two output pins of the 0-250V single-phase alternating-current voltage source are respectively connected with the first ends of the two first switch components corresponding to the first switches. Two output pins of the 0-250V/14A direct current voltage source are respectively connected with the first ends of the two first switch components corresponding to the first switches. Two output pins of the 0-120V/30A direct current voltage source are respectively connected with the first ends of the two first switch components corresponding to the first switches. Two output pins of the 0-600V/62.5A direct current voltage source are respectively connected with the first ends of the two first switch components corresponding to the first switches. Two output pins of the 0-30V/126A direct current voltage source are respectively connected with the first ends of the two first switch components corresponding to the first switches. The control ends of all the first switches are respectively connected with a programmable controller PLC.

The automatic wiring conversion device comprises 6 second switch assemblies T1-T6 and a second wiring board, wherein the second switch assemblies comprise 10 second switches, and first ends of the second switches of the same second switch assemblies are connected together. The second wiring board comprises 6 second input pins and 6 second output pins, and the second input pins are connected with the corresponding second output pins. The first end of the second switch assembly is connected with a second output pin corresponding to the second wiring board. The second input pin of the second wiring board is connected with the first output pin corresponding to the first wiring board. The control ends of all the second switches are respectively connected with a programmable controller PLC.

In addition, the first switch assembly comprises first grounding switches with the same number as the first switches, the first wiring board comprises first grounding pins, the first ends of the first grounding switches are connected with the first ends of the corresponding first switches, and the second ends of the first grounding switches are connected with the first grounding pins of the first wiring board. The second switch assembly comprises second grounding switches with the same number as the second switches, the second wiring board comprises second grounding pins, the second ends of the second grounding switches are connected with the second ends of the corresponding second switches, and the first ends of the second grounding switches are connected with the second grounding pins of the second wiring board. The control ends of all the first grounding switches and the control ends of all the second grounding switches are respectively connected with a programmable controller PLC.

The automatic wiring output device and the automatic wiring conversion device are in a symmetrical state, the automatic wiring output device and the automatic wiring conversion device are in butt joint through 7 wiring terminals, and as the number of output sources at one time is at most 6 (three-phase voltage sources and three-phase current sources), the automatic wiring output device is provided with a public end, and as the configuration of high-voltage and low-voltage switch cabinets of various manufacturers is different, the required test sources are more or less, and the automatic wiring output device provided by the embodiment of the utility model is provided with 60 voltages and the current source input ends, so that the input requirements of the voltage and current sources of all domestic high-voltage and low-voltage switch cabinets can be basically met. The output of the automatic wiring conversion device enters the test part of the switch cabinet and is respectively connected with various meters, mutual inductors and relay protection input terminals of the switch cabinet, and the output terminals of the automatic wiring conversion device are up to 60, so that the switch cabinet test wiring parts of all domestic switch cabinet manufacturers can be met, one-time wiring, full-automatic testing is realized, manual midway wiring is not needed, and quick wiring can be formed.

As shown in fig. 2, the three-phase constant current source according to the embodiment of the present utility model includes a power module, a waveform generator, a pre-amplifier circuit, a three-phase power amplifier circuit, and a three-phase constant current feedback circuit. The waveform generator comprises a CPU, a 3-way DA converter and a clock signal generator. The power supply module generates +/-30A/40A power for supplying power to the three-phase power amplifier circuit, generates +/-5V/5A power for generating signals and generates +/-15V/2A power for supplying power to the pre-amplifying circuit after the signals are generated. The input end of the power supply module is connected with a single-phase 220V alternating current power supply, and the output end of the power supply module is respectively connected with a 3-path DA converter, a pre-amplifying circuit and a three-phase power amplifying circuit. The output end of the 3-path DA converter is connected with the input end of the pre-amplifying circuit, and the output end of the pre-amplifying circuit is connected with the input end of the three-phase power amplifying circuit. The input end of the three-phase constant current feedback circuit is connected with the feedback signal output end of the three-phase power amplifier circuit, and the output end of the three-phase constant current feedback circuit is connected with the feedback signal input end of the pre-amplifier circuit. The control signal input end of the CPU is connected with the industrial personal computer of the operation console.

The three-phase constant current source of the embodiment of the utility model is a gauge outfit of a high-low voltage switch cabinet, a test current source of a mutual inductor, an AC220V input, a three-phase 0-10A AC/DC current source output, and the amplitude of the output current source is automatically adjusted by controlling through an RS232 port of an industrial personal computer.

The constant current source system is characterized in that an input single-phase 220V alternating current power supply generates a chip and a power amplifier working power supply through a power supply module, a CPU controls a clock generation circuit and a 6-path DA converter to generate a three-phase voltage source, the three-phase voltage source is amplified through a preamplifier and then sent to a power amplifier for amplification, and a three-phase constant current source is finally output through a three-phase constant current feedback circuit.

As shown in FIG. 3, the 0-450V three-phase alternating current voltage source of the embodiment of the utility model comprises a 6KVA programmable variable frequency power supply, a three-phase closing contactor, a three-phase current transformer and a three-phase multifunctional electric parameter table. The input end of the 6KVA program-controlled variable frequency power supply is connected with a 380V three-phase power supply, and the control end of the 6KVA program-controlled variable frequency power supply is connected with an industrial personal computer of an operation console. The three-phase output end of the programmable variable frequency power supply is respectively connected with a three-phase output pin of a 0-450V three-phase alternating current voltage source through three contacts of a three-phase closing contactor and three primary windings of a three-phase current transformer, and the ground wire end of the programmable variable frequency power supply is directly connected with a grounding pin of the 0-450V three-phase alternating current voltage source. Three secondary windings of the three-phase current transformer are respectively connected with three-phase current sampling signal input ends of the three-phase multifunctional electric parameter meter IVA2, and three output pins of the 0-450V three-phase alternating current voltage source are respectively connected with three-phase voltage sampling signal input ends of the three-phase multifunctional electric parameter meter IVA 2. The signal output end of the three-phase multifunctional electric parameter table IVA2 is connected with the industrial personal computer of the operation console through an RS232 serial port.

According to the embodiment of the utility model, a 0-450V three-phase alternating current voltage source is output by an industrial Personal Computer (PC) through a network port, and 0-450V voltage source output is generated according to test items. When the three-phase alternating current voltage source works, an AC380V power supply enters a 6kVA program-controlled voltage source to generate three-phase alternating current voltage source output of 0-450V, the three-phase alternating current voltage source output enters an automatic wiring output device after passing through a current transformer 1CT2,1CT3,1CT4 after passing through a switching-on relay 1KM2, three voltage lines are led out of an output voltage end to enter a three-phase multifunctional electric parameter meter to be used as voltage collection, 6 is led out of 1CT2,1CT3,1CT4 to enter the three-phase multifunctional electric parameter meter according to the lines to be used as current collection, the three-phase multifunctional electric parameter meter with an RS232 communication function can collect three-phase voltage, and then the three-phase current can display voltage, current, power and power factor of the three-phase electric parameter meter for reference when testing the power meter of a high-low voltage switch cabinet. The 6kVA programmable variable frequency power supply is from the Laiposide, the model is AC33-6kVA, and the model of the three-phase multifunctional electric parameter table is DW93-4000.

As shown in fig. 4, the 0-250V single-phase ac voltage source according to the embodiment of the present utility model includes a second closing contactor, an electric voltage regulator, a single-phase current transformer, and a first single-phase multifunctional electric parameter table IVA1, where an input end of the electric voltage regulator is connected to a 220V single-phase ac power source through the second closing contactor and a circuit breaker. The live wire of the output end of the electric voltage regulator is connected with the output pin of the live wire of the 0-250V single-phase alternating-current voltage source through the primary winding of the single-phase current transformer, and the zero wire of the output end of the electric voltage regulator is directly connected with the grounding pin of the 0-250V single-phase alternating-current voltage source. The positive rotating terminal and the reverse rotating terminal of the electric voltage regulator motor are respectively connected with a live wire of a 220V single-phase alternating-current power supply through a positive switching contactor and a reverse rotating contactor, and a zero wire pin of the electric voltage regulator motor is connected with a zero wire of the 220V single-phase alternating-current power supply. The control end of the forward contactor and the control end of the reverse contactor are respectively connected with the control signal output end of the operation console industrial personal computer. The secondary winding of the single-phase current transformer is connected with the current sampling signal input end of the first single-phase multifunctional electric parameter meter IVA1, and the live wire output pin and the grounding pin of the 0-250V single-phase alternating current voltage source are respectively connected with the voltage sampling signal input end of the first single-phase multifunctional electric parameter meter IVA 1. The signal output end of the first single-phase multifunctional electric parameter table IVA1 is connected with the industrial personal computer of the operation console through an RS232 serial port.

According to the embodiment of the utility model, a 0-250V single-phase alternating-current voltage source is controlled by an industrial Personal Computer (PC) machine to step up or step down a motor through a voltage regulator according to test items by the PLC.

The AC220V power supply enters the electric voltage regulator after passing through the closing contactor after passing through the air switch, then is output to the automatic wiring output device after passing through the current transformer 1CT1, 2 voltage lines are led out from the output end of the 0-250V single-phase alternating current voltage source and enter the voltage sampling input terminal of the single-phase multifunctional electric parameter meter IVA1, 2 lines are led out from the secondary side of the 1CT1 and are connected to the sampling input terminal of the single-phase multifunctional electric parameter meter IVA1, the output current is sampled, and the electric voltage regulator realizes the rising and falling of the voltage output by controlling the forward rotation and the reverse rotation of the motor through the PLC. The model number of the single-phase multifunctional electric parameter table IVA1 is DW81-1000.

As shown in fig. 5 and 6, the structure and principle of the dc voltage source of embodiment 4 of the present utility model are the same, except that the parameters of the components are different. The first path of the 0-250V/14A direct current voltage source is taken as an example for illustration: the direct-current voltage source comprises a program-controlled switching voltage source K1, a third switching-on contactor, a second single-phase multifunctional electric parameter meter IVA3 and a current sampling resistor RN1, and the input end of the program-controlled switching voltage source K1 is connected with a 220V single-phase alternating-current power supply through the third switching-on contactor and a circuit breaker. The positive pole of program-controlled switch voltage source K1 output connects the positive pole output pin 250V+ of the direct current voltage source through the current sampling resistor RN1, the negative pole connects the negative pole output pin 250V-of the direct current voltage source directly. The control ends DA < 1+ > and DA < 1 > -of the program-controlled switching voltage source K1 are connected with the industrial personal computer of the operation console through an RS232 serial port, and the two ends of the current sampling resistor RN1 are respectively connected with the current sampling signal input end of the second single-phase multifunctional electric parameter table IVA 3. The positive output pin and the negative output pin of the direct-current voltage source are respectively connected with the voltage sampling signal input end of the second single-phase multifunctional electric parameter table IVA 3. The signal output end of the second single-phase multifunctional electric parameter table IVA3 is connected with the industrial personal computer of the operation console through an RS232 serial port.

In the embodiment 4 of the utility model, each output voltage source in the direct-current voltage source module consists of a 0-10V independent program-controlled switch voltage source, an industrial Personal Computer (PC) outputs 0-250V,0-120V,0-60V and 0-30V voltages to the 0-10V control signal through a DA module of a programmable controller PLC, RN1 (50A/75 mA), RN1RN3 (100A/75 mA) and RN4 (200A/75 mV) are direct-current sampling resistors, are used for current sampling monitoring of the output direct-current voltage, are displayed by a second single-phase multifunctional electric parameter table IVA3, and are uploaded to the PC through an RS485 interface on the second single-phase multifunctional electric parameter table IVA 3.

When the 4 0-10V program-controlled switching voltage sources are not controlled to be output through the operation console, a knob can be adopted to adjust the potentiometer to realize the adjustment of the output of the voltage sources.

The pins DAI+ and DAI of 4 0-10V program-controlled switch voltage sources are connected with the DA output control board of the operation console, and the industrial personal computer outputs 0-10V direct current voltage through the DA output control board to control the switch power supply module to output the voltage source.

The direct current standard resistors RN1-RN4 are used for sampling the direct current output by the 0-10V program-controlled switching voltage source, and the voltage signals at two ends of the direct current standard resistors RN1-RN4 are sampled and sent to the second single-phase multifunctional electric parameter table IVA3 to realize the function of displaying and outputting the direct current.

The output pins DC250V & lt+ & gt and DC250V-, DC120V & lt+ & gt and DC120V-, DC60V & lt+ & gt and DC60V-, DC30V & lt+ & gt and DC30V & lt- & gt of the 4-path direct-current voltage source module are respectively connected to the corresponding switch components of the automatic wiring output device, and the model number of the second single-phase multifunctional electric parameter table IVA3 is DW8-1000.

The test power supply system of the secondary equipment of the high-low voltage switch cabinet adopts a modularized structure, is assisted by the automatic wiring output device and the automatic wiring conversion device controlled by the industrial personal computer and the PLC, is convenient for generating automatic test logic, automatically completes test wiring according to test items and a preset test wiring mode, can reduce the risk of wiring errors of test personnel, automatically performs various tests, and confirms test results. The device is suitable for batch delivery test or inspection of production enterprises, reduces the workload of testers, and improves the working efficiency; the test power supply system for the secondary equipment of the high-low voltage switch cabinet can be used for cascading a plurality of power supply systems simultaneously and simultaneously carrying out a plurality of tests, so that the test efficiency is greatly improved.

Claims

1. The power supply system for the secondary equipment test of the high-low voltage switch cabinet is characterized by comprising an operation console, a programmable controller, an automatic wiring output device, an automatic wiring conversion device and an input power supply, wherein the input power supply comprises a three-phase constant current source, a three-phase voltage source, a single-phase voltage source and a plurality of direct-current voltage sources, and the plurality of direct-current voltage sources have different output voltages; the control end of the three-phase constant current source, the control end of the three-phase voltage source, the control end of the single-phase voltage source and the control end of the direct-current voltage source are respectively connected with the voltage control signal input end corresponding to the operation console, and the output end of the three-phase constant current source, the output end of the three-phase voltage source, the output end of the single-phase voltage source and the output end of the direct-current voltage source are respectively connected with the voltage input end corresponding to the automatic wiring output device; the plurality of input ends of the automatic wiring conversion device are connected with the corresponding output ends of the automatic wiring output device, and the control end of the automatic wiring conversion device and the control end of the automatic wiring output device are respectively connected with the corresponding control signal output ends of the programmable controller; the plurality of output ends of the automatic wiring conversion device respectively receive the input ends of the test equipment.

2. The power system of claim 1, wherein the automatic wiring output device comprises at least 4 first switch assemblies and a first wiring board, the first switch assemblies comprising a plurality of first switches, the second ends of the first switches of the same first switch assemblies being connected together; the first wiring board comprises first input pins and first output pins, the number of the first input pins is the same as that of the first switch assemblies, the first input pins are connected with the corresponding first output pins, and the second ends of the first switches of the first switch assemblies are connected with the corresponding first input pins of the first wiring board; three output pins of the three-phase constant current source are respectively connected with the first ends of the first switches corresponding to the three first switch components, 4 output pins of the three-phase voltage source are respectively connected with the first ends of the first switches corresponding to the 4 first switch components, two output pins of the single-phase voltage source are respectively connected with the first ends of the first switches corresponding to the two first switch components, and two output pins of the direct-current voltage source are respectively connected with the first ends of the first switches corresponding to the two first switch components; the control end of the first switch is connected with the programmable controller.

3. The power system of claim 2, wherein the automatic wire conversion device comprises at least 4 second switch assemblies and a second wiring board, the second switch assemblies comprising a plurality of second switches, first ends of the second switches of the same second switch assemblies being connected together; the second wiring board comprises second input pins and second output pins, the number of the second input pins is the same as that of the second switch assemblies, and the second input pins are connected with the corresponding second output pins; the first end of a second switch of the second switch assembly is connected with a second output pin corresponding to the second wiring board; the second input pin of the second wiring board is connected with the first output pin corresponding to the first wiring board; the control end of the second switch is connected with the programmable controller.

4. The power system of claim 2, wherein the first switch assembly includes the same number of first ground switches as the first switches, the first terminal block includes first ground pins, a first end of the first ground switch is connected to a first end of a corresponding first switch, and a second end of the first ground switch is connected to the first ground pin of the first terminal block; the second switch assembly comprises second grounding switches with the same number as the second switches, the second wiring board comprises second grounding pins, the second ends of the second grounding switches are connected with the second ends of the corresponding second switches, and the first ends of the second grounding switches are connected with the second grounding pins of the second wiring board; the control end of the first grounding switch and the control end of the second grounding switch are respectively connected with the programmable controller.

5. The power supply system according to claim 1, wherein the three-phase constant current source includes a power supply module, a waveform generator, a pre-amplifier circuit, a three-phase power amplifier circuit, and a three-phase constant current feedback circuit, the waveform generator including a CPU, a 3-way DA converter, and a clock signal generator; the input end of the power supply module is connected with a single-phase 220V alternating current power supply, and the three output ends of the power supply module are respectively connected with a waveform generator, a pre-amplifying circuit and a three-phase power amplifying circuit; the output end of the 3-path DA converter is connected with the input end of the pre-amplifying circuit, and the output end of the pre-amplifying circuit is connected with the input end of the three-phase power amplifying circuit; the input end of the three-phase constant current feedback circuit is connected with the feedback signal output end of the three-phase power amplifier circuit, and the output end of the three-phase constant current feedback circuit is connected with the feedback signal input end of the pre-amplifier circuit; the control signal input end of the CPU is connected with the industrial personal computer of the operation console.

6. The power system of claim 1, wherein the three-phase voltage source comprises a programmable variable frequency power supply, a three-phase closing contactor, a three-phase current transformer, and a three-phase multifunction electrical parameter meter; the input end of the programmable variable frequency power supply is connected with a three-phase power supply, and the control end of the programmable variable frequency power supply is connected with an industrial personal computer of an operation console; the three-phase output end of the programmable variable frequency power supply is connected with three output pins of a three-phase voltage source through three contacts of a three-phase closing contactor and three primary windings of a three-phase current transformer respectively, and a ground wire of the programmable variable frequency power supply is connected with a ground pin of the three-phase voltage source; three secondary windings of the three-phase current transformer are respectively connected with three-phase current sampling signal input ends of the three-phase multifunctional electric parameter meter, and three output pins of the three-phase voltage source are respectively connected with three-phase voltage sampling signal input ends of the three-phase multifunctional electric parameter meter; the signal output end of the three-phase multifunctional electric parameter table is connected with the industrial personal computer of the operation console through a serial port.

7. The power supply system of claim 1, wherein the single-phase voltage source comprises a second switching-on contactor, an electric voltage regulator, a single-phase current transformer and a first single-phase multifunctional electric parameter meter, and an input end of the electric voltage regulator is connected with the single-phase alternating current power supply through the second switching-on contactor; the live wire of the output end of the electric voltage regulator is connected with the output pin of the live wire of the single-phase voltage source through the primary winding of the single-phase current transformer, and the zero line of the output end of the electric voltage regulator is connected with the grounding pin of the single-phase voltage source; the positive rotating terminal and the reverse rotating terminal of the electric voltage regulator motor are respectively connected with a live wire of the single-phase alternating current power supply through a positive switching contactor and a reverse switching contactor, and a zero wire pin of the electric voltage regulator motor is connected with a zero wire of the single-phase alternating current power supply; the control end of the forward contactor and the control end of the reverse contactor are respectively connected with the control signal output end of the operation console industrial personal computer; the secondary winding of the single-phase current transformer is connected with the current sampling signal input end of the first single-phase multifunctional electric parameter table, and the live wire output pin and the grounding pin of the single-phase voltage source are respectively connected with the voltage sampling signal input end of the first single-phase multifunctional electric parameter table; the signal output end of the first single-phase multifunctional electric parameter table is connected with the industrial personal computer of the operation console through a serial port.

8. The power supply system according to claim 1, wherein the direct-current voltage source comprises a programmable switching voltage source, a third switching-on contactor, a second single-phase multifunctional electric parameter table and a current sampling resistor, and an input end of the programmable switching voltage source is connected with the single-phase alternating-current power supply through the third switching-on contactor; the positive electrode of the output end of the program-controlled switch voltage source is connected with the positive electrode output pin of the direct current voltage source through the current sampling resistor, and the negative electrode is connected with the negative electrode output pin of the direct current voltage source; the control end of the program-controlled switch voltage source is connected with the industrial personal computer of the operation console through a serial port, and the two ends of the current sampling resistor are respectively connected with the current sampling signal input end of the second single-phase multifunctional electric parameter table; the positive output pin and the negative output pin of the direct-current voltage source are respectively connected with the voltage sampling signal input end of the second single-phase multifunctional electric parameter table; the signal output end of the second single-phase multifunctional electric parameter table is connected with the industrial personal computer of the operation console through a serial port.