一种基于固有频率的长距离输电线路保护方案

HUANG Shaofeng; WANG Xingguo; LIU Qiankuan

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一种基于固有频率的长距离输电线路保护方案

更新时间：2025-08-13

- 一种基于固有频率的长距离输电线路保护方案
- Automation of Electric Power Systems Vol. 32, Issue 8, Pages: 59-63(2008)
- 作者机构：
  
  华北电力大学电力系统保护与动态安全监控教育部重点实验室,北京市,102206
- 作者简介：
- 基金信息：
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- Published：2008
- 稿件说明：
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HUANG Shaofeng, WANG Xingguo, LIU Qiankuan. [J]. Automation of electric power systems, 2008, 32(8): 59-63.
DOI：

HUANG Shaofeng, WANG Xingguo, LIU Qiankuan. [J]. Automation of electric power systems, 2008, 32(8): 59-63. DOI：

摘要

故障后由于分布电容引起的高频分量在频域表现为固有频率主频的谐波形式。文中讨论了影响固有频率的各种因素，提出了一种基于固有频率的线路保护方案。首先对故障后的电流频谱进行分析，确定固有频率，然后计算固有频率下的阻抗，通过2种判据确定区内、区外故障。该方案不受故障时刻和故障位置的影响，大量的ATP仿真和MATLAB分析验证了该方案的可行性。

Abstract

The post-fault high frequency currents caused by distribution capacitances are mainly observed as harmonics in the frequency domain for a transmission line. The paper discusses various influencing factors and proposes a natural frequency based protection scheme. The post-fault current spectrum is first analysed to find out natural frequency. And then the impedance based on the natural frequency is calculated and internal and external zone faults are distinguished via two criteria. The method is immune to the fault location and time. The method is validated by ATP and MATLAB simulation.

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