Charging switch used for improving output efficiency of impulse voltage generator

Abstract

The invention provides a charging switch used for improving output efficiency of an impulse voltage generator. The charging switch comprises fixing bearings and rotary conducting rods arranged on a power insulating rod at equal intervals. Each fixing bearings is mounted on a support column flange of the charging end at each level of the impulse voltage generator, and is provided with a fixed electrode. If each of contact electrodes is connected with the corresponding fixed electrode, charging voltages at all levels of the impulse voltage generator are equal, and charging nonuniformity of a traditional impulse voltage generator is eliminated; if each contact electrode is disconnected with the corresponding fixed electrode, the impulse voltage generator is disconnected at each level, and energy loss in the discharging process of a charging resistor of the traditional impulse voltage generator is eliminated. Compared with the prior art, the charging switch has the advantages that switching between charging and discharging circuit topology of the impulse voltage generator is realized effectively, and the purpose of outputting efficient long-wave front operation impulse voltage is achieved.

Description

technical field [0001] The invention relates to a charging switch, in particular to a charging switch for improving the output efficiency of an impulse voltage generator. Background technique [0002] The operating impact dielectric strength is the main basis for determining the size of the air gap in EHV / UHV power transmission and transformation projects. Due to the improvement of the voltage level of the transmission line and the increase of the line length, the line operation overvoltage front time is also gradually lengthened. For example, the operation overvoltage front time of the 1000kV UHV AC project is mostly 1000μs-2500μs. [0003] The impulse voltage generator is a key test device for studying the insulation strength of the air gap. The efficiency of the operating impulse voltage generated by the existing equipment decreases sharply as the wave front time increases. In order to overcome the problem that the existing extra-large impulse voltage generator cannot ge...

AI Technical Summary

Problems solved by technology

In order to overcome the problem that the existing extra-large impulse voltage generator cannot generate the impulse voltage with a wave front time of more than 1500 microseconds and the efficiency is not enough, it is necessary to use a charging switch mechanism to consume energy on the charging resistor during the impulse voltage output process to improve the output. efficiency

[0004] When the traditional impulse voltage generator generates long-wave front operation impulse voltage, the energy stored in the capacitor will be consumed by the charging resistor, resulting in low output voltage efficiency

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