电气工程学报 ›› 2019, Vol. 14 ›› Issue (4): 79-84.doi: 10.11985/2019.04.012

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频率相关参数高压直流输电线路故障特征分析

于洋,赵彦龙,崔川,王磊磊,王亚飞   

  1. 国网山东省电力公司淄博供电公司 淄博 255000
  • 收稿日期:2019-12-08 出版日期:2019-12-25 发布日期:2020-03-18
  • 作者简介:于洋,男,1986年生,硕士,高级工程师。主要研究方向为电力系统继电保护。E-mail:ytplyy@126.com|赵彦龙,男,1992年生。主要研究方向为电力系统继电保护。E-mail:ylzhao_sjtu@163.com

Frequency Characteristics of Fault Transients for HVDC Transmission Line with Frequency-dependent Distributed Parameters

Yang YU,Yanlong ZHAO,Chuan CUI,Leilei WANG,Yafei WANG   

  1. State Grid Zibo Power Supply Company, Zibo 255000 China
  • Received:2019-12-08 Online:2019-12-25 Published:2020-03-18

摘要:

在总结直流输电线路行波保护优缺点的同时,指出目前在直流线路行波保护研究方面存在的不足,并针对问题提出故障特征分析的方法,即从输电系统的频域入手,对暂态分量在输电线路上传播特性进行深入分析,主要包括频率相关参数直流线路和由滤波系统组成的直流线路边界的频率特性,通过仿真分析论证了直流线路和直流边界的透、反射系数的频率特性是造成区内、外故障暂态分量差异的主要因素,并由此提出不同线路长度时区内、外故障差异主要存在的频带选取方法。以上提出的分析方法对直流线路行波或者暂态保护的研究具有参考价值。

关键词: 直流线路行波保护, 频率相关参数, 线路边界, 暂态分量

Abstract:

The advantages and disadvantages of the traveling wave protection of HVDC transmission line are summarized, and proposed the problems in the raveling wave protection, as well as faulty analysis method for these problems at the same time, which is starting from the frequency domain transmission system, deep analyze the transient component propagation of the DC transmission line that mainly including the characteristics of frequency-dependent parameters of the DC line and the border composition by filter system. Thence the effective band between outside and inside fault of the line is proposed. The analytical methods could provide a reference value for DC circuit transient protection.

Key words: Transient protections for HVDC transmission lines, frequency-dependent parameters, line border, transient component

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