Controllable metal oxide arrester action characteristic testing device and method therefor

Abstract

The invention discloses a controllable metal oxide arrester action characteristic testing device and a method therefor. The method comprises: the sphere gap spacing in an impulse voltage generator isregulated, impulse voltage with the peak value higher than the action threshold value of a controllable metal oxide arrester sample is applied on the controllable metal oxide arrester sample for a plurality of times, and the voltage value of the controllable metal oxide arrester sample at the action moment can be obtained by recording the voltage value of the sample at the action moment. The action characteristic testing method of the controllable arrester has good system equivalence under the conditions of power frequency, operation and lightning impulse voltage, so as to comprehensively testthe action characteristics of the controllable arrester in an actual system under various voltages.

Description

technical field [0001] The invention relates to the technology of a controllable metal oxide arrester, in particular to a device and method for testing the operating characteristics of a controllable metal oxide arrester. Background technique [0002] According to the demand of UHV AC transmission system for deeply reducing the level of operating overvoltage and the shortcomings of conventional limiting measures of operating overvoltage in terms of economy and operational reliability, the concept of controllable metal oxide arrester is proposed. Hereinafter, the controllable metal oxide arrester is simply referred to as the controllable arrester. The structure of the controllable arrester is as figure 1 As shown, MOA1 and MOA2 are controlled components and fixed components respectively; K is a switch, which can be a thyristor or a gap. The working principle of the controllable arrester is to flexibly control the number of connected resistors of the arrester through K to ch...

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Problems solved by technology

[0003] However, the description of the working principle of the controllable arrester and its thyristor switch K under the operating voltage, power frequency overvoltage, operating overvoltage and lightning overvoltage in the prior art is limited to theoretical analysis, and whether it is correct or not still needs to be tested by experiments

At present, there are only standards for power frequency voltage withstand test, operating impulse voltage test and lightning impulse voltage test of conventional arresters at home and abroad, and the above-mentioned standards are all for testing the insulation performance of conventional arresters, and cannot be directly used to test controllable Operating characteristics of arresters under various voltage stresses

At present, there are no ready-made test methods and test standards for the new equipment of the controllable arrester. Therefore, it is necessary to formulate new test methods and test standards for the characteristics of the controllable arrester.

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