摘要
根据局部同塔双回直流输电线路的结构特点,对不同区段入射情况下分界点处的电压模量行波折射特性进行了理论和仿真分析,在此基础上,详细分析了局部同塔双回直流线路在不同区段线路发生单极接地故障时的故障行波特性,并讨论了实际工程的影响因素,最后对行波保护特征量的影响进行总结。研究结果表明,局部同塔双回直流线路中分界点的折反射将造成模量行波的重新分配以及幅值大小的变化,这是其行波保护的动作性能分析及保护新原理研究中必须考虑的影响因素。
According to structural features of double-circuit HVDC transmission lines partially on the same tower,this paper makes theoretical and simulating analysis on refraction characteristics of travelling waves of voltage modulus at the demarcation points in different line segments.Then it analyzes characteristics of faulted travelling waves of double-circuit HVDC transmission lines in different line segments as single pole grounding fault occurs,and discusses influencing factors of the actual engineering as well as summarizes effects on characteristic quantities of travelling wave protection.The research results indicate refraction and reflection of the demarcation point may cause reassignment of travelling waves and changes of amplitudes,which must be considered for analyzing action performance and studying new principle of travelling wave protection.
作者
郭履星
李海锋
王钢
梁远升
GUO LU xing;LI Haifeng;WANG Gang;LIANG Yuansheng(College of Electric Power, South ChinaUniversity of Technology, Guangzhou, Guangdong 510640, China)
出处
《广东电力》
2018年第5期94-100,共7页
Guangdong Electric Power
基金
国家自然科学基金项目(51577072)
关键词
局部同塔双回直流输电线路
相模变换
分界点
行波特性
行波保护
double-circuit HVDC transmission lines partially on the same tower
phase-mode transformation
demarcationpoint travellingwave characteristic travelling wave protection
