110 kV thyristor valve type controllable lightning arrester device and verification method

Abstract

The invention discloses a 110 kV thyristor valve type controllable lightning arrester device and a verification method. The device comprises a controlled element module and a thyristor valve switch module which are located at a low voltage end and a fixed element module located at a high voltage end; when system operation overvoltage exceeds a control voltage threshold, the thyristor valve switchmodule is conducted, the controlled element module is short connected, the residual voltage of the fixed element module is low, and the system operation overvoltage is deeply limited; under system continuous running voltage, temporary overvoltage and lightning overvoltage, the thyristor valve switch module is disconnected, and the controlled element module and the fixed element module bear the system voltage or the overvoltage together; the thyristor valve type controllable lightning arrester device can perform a static potential distribution test, motion characteristic tests under the temporary overvoltage, operation overvoltage and lightning overvoltage and residual voltage test respectively, and can effectively verify the correctness of a working principle of a controllable lightning arrester, and motion accuracy and reliability of the controllable lightning arrester under various overvoltage.

Description

technical field [0001] The invention relates to the field of metering and calibration, and more specifically, relates to a 110kV thyristor valve type controllable arrester device and a verification method. Background technique [0002] In the UHV transmission system, the saturation characteristic of the air gap operation impulse discharge voltage is more significant, and the deep reduction of the operating overvoltage level plays a vital role in reducing the line air gap. The operating overvoltage drops from 1.7pu to 1.6pu, and the air gap of the transmission line decreases by 0.6m on average. In addition, the operating overvoltage level also has a certain impact on the manufacturing difficulty of power transmission and transformation equipment. Therefore, it is necessary to deeply reduce the operating overvoltage multiple. [0003] At present, there are mainly two methods to reduce the operating overvoltage: 1) Metal oxide arresters and circuit breakers are combined with c...

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Problems solved by technology

[0007] The present invention proposes a 110kV thyristor valve type controllable arrester device and verificatio

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