Research and Experiments on an External Miniaturized VFTO Measurement System

Author:

Wang Lizhe,Zhang Wenbin,Tan Xiangyu,Chen Weiren,Liang Shiqi,Suo Chunguang

Abstract

Disconnect switch and circuit breakers operations in gas insulated switchgear (GIS) systems may produce very fast transient overvoltage (VFTO). Detecting VFTO is the first step for researchers to reduce the damage to other equipment of the substation caused by VFTO. Most of the existing sensors used for VFTO are generally bulky, complex to install, and require modification of the GIS structure. In this paper, a miniaturized measurement system that uses capacitive voltage divider and differentiating–integrating circuit is proposed. A special sensor structure and optimized differentiating–integrating circuit components arrangement were designed to increase the bandwidth of the measurement system. The frequency-domain, time-domain and voltage divide calibration experiment was performed, and a comparison experiment with an internal VFTO sensor was conducted. The measurement system was applied in the 500 kV GIS substation, and the VFTO measurement under specific conditions was carried out. The measured time domain and frequency domain waveforms conformed to the definition of standard VFTO according to IEC 60,071. It was found that the proposed measurement system meets VFTO measurement requirements and can be applied to actual VFTO measurements.

Publisher

MDPI AG

Subject

Electrical and Electronic Engineering,Biochemistry,Instrumentation,Atomic and Molecular Physics, and Optics,Analytical Chemistry

Reference29 articles.

1. Very fast transients in GIS

2. High-Voltage Switchgear and Control Gear, Part 102: Alternating Current Disconnectors and Earthing Switches, 2.0.,2018

3. Effects of very fast transient overvoltages on transformer

4. Analysis of very fast transients in transformers

5. Simulation analysis of the influence of circuit breaker transient model and parameters on VFTO;Kong;Electr. Meas. Instrum.,2018

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