Pilot Impedance Performance Analysis for Transmission Lines with Series Compensation

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Pilot Impedance Performance Analysis for Transmission Lines with Series Compensation

更新时间：2025-07-09

- Pilot Impedance Performance Analysis for Transmission Lines with Series Compensation
- Vol. 45, Issue 6, Pages: 97-103(2011)
- 作者机构：
  
  西安交通大学电气工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM77
- Online First：10 June 2011，
  
  Published：2011
- 稿件说明：
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Pilot Impedance Performance Analysis for Transmission Lines with Series Compensation[J]. 2011, 45(6): 97-103.
DOI：

Pilot Impedance Performance Analysis for Transmission Lines with Series Compensation[J]. 2011, 45(6): 97-103. DOI：

摘要

在系统分析基于串联补偿电容器下输电线路纵联阻抗性能特点和阻值特征的基础上

特别在详细分析串联补偿电容器及其附属的金属氧化物变阻器(MOV)、放电间隙等不同的运行方式在纵联阻抗产生影响的前提下

确立了纵联保护的甄别方法.由于在串联补偿下输电线路分布电容和系统运行方式共同影响纵联阻抗的阻值

因此通过分析和计算才能确定是否需要补偿.一旦纵联阻抗幅值小于设定数值时

就可确定发生区内故障

保护将正确动作; 否则

就断定在保护区内没有发生故障

保护将稳定不动.在EMTP软件的仿真中

建立了一条1 000 kV、 500 km 含工频串联补偿度为45%串联补偿电容器的特高压输电线路模型

进行了在各种故障下的仿真模拟

仿真结果验证了上述纵联阻抗及其算法在串联补偿环境下具有足够的稳定性和可靠性.

Abstract

According to the systematic analysis for performance and impedance value of the transmission line pilot impedance based on the series compensation capacitors

especially for the influences of the different operation modes of the series compensation capacitors and subsidiary metal oxide varistor(MOV)

and the discharge gap on the pilot impedance

a discrimination method of the related pilot protection is established. Because the distributed transmission line capacitances and the system operation modes mutually affect the pilot impedance

the necessity of compensation for pilot impedance can be determined via calculation. When the amplitude of the pilot impedance is smaller than the setting value to demonstrate the internal fault

the pilot protection is correctly operated; otherwise the pilot protection is stably be blocked. In the EMTP simulation

an UHV transmission line model of 1 000 kV

500 km

including the series compensation capacitors of 45% power frequency series compensation degree

is constructed to simulate different types of faults.

关键词

Keywords

references

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Related Institution

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