10 KV square-wave voltage generator for checking performance of impulse voltage divider

Abstract

The invention provides a 10 KV square-wave voltage generator for checking the performance of an impulse voltage divider. The 10 KV square-wave voltage generator for checking the performance of the impulse voltage divider comprises a high-voltage direct-current power supply, an energy-storage capacitor arranged in a metal shielding box, a gas spark switch, an air storage tank and a capacitive voltage divider, wherein the high-voltage direct-current power supply is connected with the energy-storage capacitor, the gas spark switch is connected with the tested voltage divider, the energy-storage capacitor is charged through the high-voltage direct-current power supply, and when the charging voltage rises to the breakdown voltage of the gas spark switch, the gas spark switch breaks down and outputs rising edge type square-wave voltage to the tested voltage divider. Compared with the prior art, the 10 KV square-wave voltage generator for checking the performance of the impulse voltage divider has the advantages that a square-wave response test can be conducted on impact resistance voltage dividers on various voltage levels and with various intrinsic standoff ratios and low-damping capacitive voltage dividers, so that the dynamic response performances of the impact resistance voltage dividers and the low-damping capacitive voltage dividers are judged.

Description

technical field [0001] The invention relates to a square wave voltage generator, in particular to a 10kV square wave voltage generator for checking the performance of an impact voltage divider. Background technique [0002] In the power system, in order to test the ability of electrical equipment to withstand lightning impulse overvoltage, it is necessary to perform an impulse voltage withstand test before leaving the factory, so it is necessary to be equipped with an impulse voltage generator and supporting impulse voltage divider measuring equipment for the test The equipment undergoes other performance tests such as factory withstand voltage. Since the wave front time of the lightning impulse waveform is only on the order of μs, the impulse voltage divider needs to have better dynamic response characteristics to ensure the accuracy of the amplitude and time measurement of the impulse voltage divider. At present, the method of judging the dynamic characteristics of the im...

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Problems solved by technology

Since the stabilization time of the impact resistance voltage divider is generally about 200ns, and the stabilization time of the weak damping voltage divider is longer, the exact stabilization time of the voltage divider cannot be calculated when the pulse width of the square wave voltage is too small

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