A short-circuit performance testing system and method thereof
A test system and performance technology, applied in the field of power metering equipment test systems, can solve the problems of large-capacity power supply lines, high prices, high-current quality impact transformers and large volumes, etc., to meet the needs of reducing work complexity and power supply capacity , The effect of low cost of test equipment
Active Publication Date: 2018-01-19
STATE GRID CORP OF CHINA +1
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Problems solved by technology
In order to ensure the quality and reliability of power supply, it is more difficult to obtain the approval of large-capacity power supply lines, and the high-current quality impact transformers with voltage levels of 10kV and above are bulky and expensive, so it is necessary to provide a short-circuit performance based on a general-purpose three-phase power supply Detection system and detection method thereof to overcome the defects of the prior art
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[0057] As shown in Figure 3, the system includes 380V AC power supply, AC / DC rectifier cabinet, super capacitor bank, PWM power amplifier module, test area, RLC load cabinet, microcomputer control part and liquid crystal display module.
[0058] The 380V AC power supply part is responsible for providing energy for the entire system, which is the basis for the normal operation of the entire system and can ensure the reliability of the system operation.
[0059] The AC / DC rectifier cabinet is responsible for converting alternating current into direct current, which is the energy conversion link of the entire system and is responsible for charging the supercapacitor bank.
[0060] The supercapacitor bank is responsible for storing and releasing direct current, which is the core link of the whole system. It is responsible for storing the electric energy of the conventional power supply and releasing it after reaching sufficient power supply capacity to meet the requirements of shor...
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The invention relates to a short circuit performance testing system and method. The system comprises a main control module, a rectifying module, an energy storage module, a pulse-width modulation (PWM) power amplifier module, an adjusting impedance module, a wave recording module and a safety module. The main control module comprises a control module, a communication module, a display module and a data presetting module. The main control module is connected with the energy storage module, the PWM power amplifier module, the adjusting impedance module, the wave recording module and the safety module through the rectifying module. The rectifying module, the energy storage module, the PWM power amplifier module, a tested object and the adjusting impedance module are sequentially connected. The method includes that (1) the energy storage module is charged; (2) short circuit current loading capacity testing operation is conducted; (3) short circuit current limiting performance test operation is conducted; (4) connection and disconnecting performance test operation under abnormal conditions is conducted. By means of the system and method, requirements of the short circuit performance test for power capacity are reduced, test equipment is low in cost, and project construction is simple and practicable.
Description
technical field [0001] The invention relates to a test system for electric power metering equipment, in particular to a short-circuit performance test system and a method thereof. Background technique [0002] With the rapid development of smart grid, the usage of smart energy meters is increasing rapidly. As the key equipment of electric energy metering, the smart electric energy meter not only needs to meet the measurement performance requirements, but also must ensure its safety and reliability. Therefore, the pre-use verification department must pass the verification before it can be used. The load switch in the smart energy meter is one of the important components, and its quality determines the quality of the whole product of the smart energy meter. The short-circuit performance test is an important technical index to detect the performance of the load switch used in the electric energy meter. It mainly includes the short-circuit current carrying capacity test, the li...
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IPC IPC(8): G01R31/327
Inventor 陈盛张蓬鹤薛阳陈思禹贾福泉许佳佳秦程林鲍文静黎昊奇王雅涛
Owner STATE GRID CORP OF CHINA