首页 | 本学科首页   官方微博 | 高级检索  
     检索      

利用保护元件区分对侧区内外故障的特高压直流输电线路双端电压暂态保护原理
引用本文:陈仕龙,束洪春,谢佳伟,张杰.利用保护元件区分对侧区内外故障的特高压直流输电线路双端电压暂态保护原理[J].继电器,2013,41(15):14-20.
作者姓名:陈仕龙  束洪春  谢佳伟  张杰
作者单位:昆明理工大学电力工程学院,云南 昆明 650500;昆明理工大学电力工程学院,云南 昆明 650500;昆明理工大学电力工程学院,云南 昆明 650500;昆明理工大学电力工程学院,云南 昆明 650500
基金项目:国家自然科学基金资助项目(51267008)
摘    要:平波电抗器、直流滤波器、PLC滤波器构成特高压直流输电线路现实边界。分析特高压直流输电线路以及边界的频率特性,研究特高压直流输电线路以及边界对故障暂态电压信号高频量的衰减作用,得到当故障发生点与保护安装点的距离大于 时,线路对频率为 高频量的衰减作用将大于边界的衰减作用的结论。证明特高压直流输电系统整流侧和逆变侧关于直流输电线路中点对称,提出利用保护元件区分对侧区内外故障的特高压直流输电线路双端电压暂态保护原理和动作判据,该原理能实现特高压直流输电线路全线保护。建立云广特高压直流输电系统实际参数仿真模型,对所提出的特高压直流输电线路双端电压暂态保护原理进行仿真验证。

关 键 词:特高压直流  线路边界  频率特性  双端电压暂态保护  频谱分析

Principle of double-ended transient based voltage protection for UHVDC transmission line which uses protector to identify the opposite internal and external fault
CHEN Shi-long,SHU Hong-chun,XIE Jia-wei and ZHANG Jie.Principle of double-ended transient based voltage protection for UHVDC transmission line which uses protector to identify the opposite internal and external fault[J].Relay,2013,41(15):14-20.
Authors:CHEN Shi-long  SHU Hong-chun  XIE Jia-wei and ZHANG Jie
Abstract:The smoothing reactor, DC filter and PLC filter form the physical boundary of UHVDC transmission line. The frequency characteristics of UHVDC transmission line and line boundary are analyzed, the attenuation of high frequency fault transient signal caused by UHVDC transmission line boundary and transmission line is studied, and it is concluded that when the distance between the fault position and protector is longer than , the attenuation of transmission line affecting high frequency signal will be greater than that of the boundary. It proves that UHVDC rectifier side and inverter side are symmetrical regarding mid-point of DC transmission line. A double-ended transient based voltage protection principle and operation criterion for UHVDC transmission line which uses protector to distinguish the opposite internal and external fault is proposed. The theory can protect the whole transmission line without direction element. The actual parameter simulation model for Yun-Guang UHVDC transmission system is built up to simulate the double-ended transient based voltage protection method.
Keywords:UHVDC  transmission line boundary  frequency characteristic  double-ended transient based voltage protection  frequency spectrum analysis
点击此处可从《继电器》浏览原始摘要信息
点击此处可从《继电器》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号