Broadband Modeling of Ultra High Voltage CVT Capacitor Voltage Divider

doi:10.11930/j.issn.1004-9649.2015.12.110.4

Electric Power ›› 2015, Vol. 48 ›› Issue (12): 110-114.DOI: 10.11930/j.issn.1004-9649.2015.12.110.4

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Broadband Modeling of Ultra High Voltage CVT Capacitor Voltage Divider

LI Xuan¹, ZHANG Guangyong², WANG Xiaoqi¹, WANG Ping², WANG Zengwen³, LI Xiaoyan³

1. China Electric Power Research Institute, Wuhan 430074, China;
2. School of Electric and Electronic Engineering,North China Electric Power University, Baoding 071003, China;
3. Guilin Power Capacitor Co., Ltd., Guilin 541006, China

Received:2015-05-08 Online:2015-12-18 Published:2015-12-30
Supported by:
This work is supported by Science and Technology Projects of SGCC (No; GYW17201400161)

Abstract

Abstract: Ultra high voltage(UHV) capacitor voltage transformer(CVT) is an important primary equipment. As the capacitive divider of CVT suffers high voltage from power grid, broadband modeling of CVT capacitive divider has important significance for studying the over-voltage distribution. The broadband’s impedance parameters of the CVT capacitive voltage divider are measured by network analyzer and processed for rational function approximation with the vector matching method. And then a broadband equivalent circuit is built by circuit synthesis. Comparing the measurement and modeling results of the two devices shows that the method is applicable to broadband modeling of UHV CVT capacitive divider.

Key words: ultra high voltage CVT, capacitor voltage divider, broadband model, vector fitting, circuit synthesis

CLC Number:

TM451

LI Xuan, ZHANG Guangyong, WANG Xiaoqi, WANG Ping, WANG Zengwen, LI Xiaoyan. Broadband Modeling of Ultra High Voltage CVT Capacitor Voltage Divider[J]. Electric Power, 2015, 48(12): 110-114.

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Broadband Modeling of Ultra High Voltage CVT Capacitor Voltage Divider

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