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

• 电网 • 上一篇    下一篇

特高压CVT电容分压器的宽频建模

李璿1, 张广勇2, 王晓琪1, 王平2, 王增文3, 李小燕3   

  1. 1. 中国电力科学研究院,湖北 武汉 430074;
    2. 华北电力大学 电气与电子工程学院,河北 保定 071003;
    3. 桂林电力电容器有限责任公司,广西 桂林 541006
  • 收稿日期:2015-05-08 出版日期:2015-12-18 发布日期:2015-12-30
  • 作者简介:李璿(1984—),女,湖北大冶人,工程师,从事互感器技术研究。E-mail: lix@whvri.com
  • 基金资助:
    国家电网公司科技项目(GYW17201400161)

Broadband Modeling of Ultra High Voltage CVT Capacitor Voltage Divider

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

  1. 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)

摘要: 特高压电容式电压互感器(CVT)作为特高压电网中重要的一次设备,其电容分压器承受着来自电网的特高电压,建立特高压CVT电容分压器的宽频模型对研究其过电压分布具有重要的意义。通过网络分析仪测量特高压CVT电容分压器的宽频阻抗参数,然后利用矢量匹配法对测量到的宽频阻抗参数进行有理函数逼近,再通过电路综合理论得到特高压CVT电容分压器的宽频等效电路。通过对2台电容分压器的测量和建模结果进行对比分析可知,该方法适用于建立特高压CVT电容分压器宽频等效电路模型。

关键词: 特高压电容式电压互感器, 电容分压器, 宽频模型, 矢量匹配法, 电路综合

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

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