摘要
电力电子化设备的广泛应用导致电力系统故障暂态过程更加复杂、快速,对继电保护的"四性"提出了更高要求,基于暂态量的继电保护优势更加凸显。首先介绍了电力电子化电力系统的故障特性,详细分析了电力电子器件的快速调节特性与脆弱性以及对电力系统故障特性的影响。其次全面梳理了暂态量在线路保护中的应用,包括行波波头保护、单端暂态量保护等,并进一步分析了基于双端(多端)暂态量的保护新原理和新方法。最后给出了对暂态量保护研究的建议,通过合理利用故障全过程中丰富的暂态信息,实现与故障信息自适应匹配的高速暂态量保护,全面筑牢电网安全的"第一道防线"。
Wide application of power electronic equipment has made the fault transient process of a power system more complicated and faster.This forces higher requirements on the“four characteristics”of relay protection.Therefore,the advantages of transient-based relay protection have become more prominent.First,the fault characteristics of the electronic power system are introduced.The fast adjustment and fragility of power electronic devices and their influence on the fault characteristics of a power system are analyzed in detail.Secondly,the application of transient quantities in line protection is comprehensively established,including traveling wave front protection,single-ended transient protection,etc.Then,new principles and methods of protection based on double-ended(multi-terminal)transients are analyzed.Finally,suggestions for research on transient-based protection are given.By rationally using the abundant transient information in the entire fault process,high-speed transient-based protection which could adaptively be matched to the fault is realized,and the“first line of defense”for power grid security can be fully established.
作者
郑博文
王增平
吕哲
王彤
ZHENG Bowen;WANG Zengping;LÜZhe;WANG Tong(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(North China Electric Power University),Beijing 102206,China;Department of Electrical Engineering,Tsinghua University,Beijing 100084,China)
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2020年第22期18-25,共8页
Power System Protection and Control
基金
国家重点研发计划项目资助(2016YFB0900604)
国家电网公司科技项目资助(52094017000W)
国家自然科学基金重点项目资助(51637005)。
