High-voltage high-capacity impulse voltage generator

Abstract

The invention discloses a high-voltage high-capacity impulse voltage generator. The impulse voltage generator comprises a charging capacitor, a wave head resistance, a wave tail resistance, a voltage divider, a load and a sphere gap; the impulse voltage generator is provided with a plurality of impulse voltage generating units consisting of the charging capacitor, the wave head resistor and the wave tail resistor; and the wave head resistor is arranged in a discharging loop. The impulse voltage generator is characterized in that: in partial or all impulse voltage generating units, wave modulation capacitors are arranged in parallel at two ends of the wave head resistor. The generator overcomes the defect that the wave modulation resistor of the traditional method cannot generate standard thunder impulse, can effectively inhibit adverse effect generated by stray inductance, and generates standard thunder impulse voltage; and the generator can generate the standard thunder impulse by increasing a few elements based on the conventional equipment, and has the advantages of small volume, low cost and the like.

Description

technical field [0001] The invention belongs to the high-voltage large-capacity impulse voltage generator in the technical field of high-voltage testing, and specifically relates to the wave modulation problem of its lightning impulse voltage. Background technique [0002] With the rapid development of my country's economy, the power industry needs to continue to build to meet the needs of economic development. At the same time, in order to achieve the national goal of energy conservation and emission reduction, the voltage level of power grid operation has been raised from ultra-high voltage to ultra-high voltage. At present, my country's UHV AC and DC projects are in a stage of rapid development. UHV means higher operating voltage, which requires a lot of test work on the normal operation of the power grid and equipment to provide design reference and support for actual projects. Since UHV towers are relatively high, they are very vulnerable to lightning strikes. Therefore...

AI Technical Summary

Problems solved by technology

Excessive equipment size causes stray parameters in the discharge circuit to have a great impact on the shock waveform, especially for lightning shocks, stray inductance will produce serious oscillations during the discharge process, and cannot produce waveforms that meet the requirements of the national standard

In the traditional lightning impulse generator, the lightning impulse waveform generated by adjusting the wave head and tail resistance is usually used, but this method cannot suppress the oscillation caused by stray inductance, so the current high-voltage and large-sized lightning impulse generator This method is not applicable, and the standard lightning shock wave cannot be generated by only using the wave modulation resistor

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