A High Frequency Circuit Model for Potential Transformer in Gas Insulated Substation Based on the Black Box Method

ZHANG Zhong-yuan; CHEN Yu-tong

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A High Frequency Circuit Model for Potential Transformer in Gas Insulated Substation Based on the Black Box Method

更新时间：2025-04-26

- A High Frequency Circuit Model for Potential Transformer in Gas Insulated Substation Based on the Black Box Method
- High VoltageApparatus Issue 4, Pages: 295-297+300(2008)
- 作者机构：
  
  华北电力大学电气与电子工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM451
- Published：2008
- 稿件说明：
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[1]张重远,陈昱同.基于黑盒子方法的GIS内电压互感器高频电路模型的建立[J].高压电器,2008(04):295-297+300.

ZHANG Zhong-yuan, CHEN Yu-tong. A High Frequency Circuit Model for Potential Transformer in Gas Insulated Substation Based on the Black Box Method[J]. High voltageapparatus, 2008, (4): 295-297+300.
[1]张重远,陈昱同.基于黑盒子方法的GIS内电压互感器高频电路模型的建立[J].高压电器,2008(04):295-297+300. DOI：

ZHANG Zhong-yuan, CHEN Yu-tong. A High Frequency Circuit Model for Potential Transformer in Gas Insulated Substation Based on the Black Box Method[J]. High voltageapparatus, 2008, (4): 295-297+300. DOI：

摘要

为了研究气体绝缘变电站内的开关操作产生的陡波前过电压（VFTO）通过互感器对二次设备的影响

需要建立它们的高频电路模型。笔者提出了一种基于黑盒子方法的电压互感器（PT）高频电路模型的建立方法。该方法在应用矢量匹配法逼近PT导纳参数矩阵Y（s）的基础上建立了其π型等效电路

然后运用福斯特型RLC电路综合方法实现了该电路模型。为了保证电路模型仿真时的稳定性

对Y（s）的实部进行了无源性修正。由于该方法保证了所建模型的宏观无源性

所以建立的电路模型可以进行稳定、准确的数值仿真。对一个实际PT的测量和仿真计算验证了该方法的有效性。

Abstract

In order to study the interference caused by very fast transient overvoltage on the secondary circuit via potential/current transformers（PT/CT） in GIS

a method for building a high frequency terminal model of PT based on the black box technique was presented.An equivalent π circuit model of PT was set up based on the rational function approximation of admittance matrix Y（s） by means of vector fitting method

and a higher order RLC equivalent lumped circuit was constructed based on the Foster synthesis method.To guarantee the simulation stability of the circuit model

a correction of the real part of Y（s） was made

which enforces the positive-definite criterion（passivity） to be satisfied.The simulation and the measurement results of a real PT confirm the validity of the proposed method.

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Related Institution

Henan High Voltage Apparatus Research Institute Co, Ltd

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