摘要
串联电容补偿技术是超高压及特高压远距离输电中的关键技术之一。随着串联补偿装置的广泛应用和电网的快速发展,有可能出现大串补度输电线路的情况,这将对输电线路继电保护甚至是主保护的动作性能产生影响。文中结合工程实际,对大串补度输电线路的电流差动保护动作特性进行了研究,并分析了过渡电阻、系统的运行方式及功角变化对电流差动保护的影响。根据仿真结果,对提高电流差动保护的灵敏度提出了相应的改进措施。
Series capacitor compensation technology is one of the key technologies in EHV and UHV long distance transmission.With wide application of the series compensation device and rapid development of the power grid,transmission lines with high series compensation degree may well appear which will affect the protection of transmission lines and even the main protection performance.The operation characteristics of the main protection are studied by referring to engineering practice,and the influence of the transition resistance,system operation mode and power angle on the current differential protection is analyzed.According to the simulation results,countermeasures for improving the sensitivity of differential current protection are presented.
出处
《电力系统自动化》
EI
CSCD
北大核心
2015年第7期157-163,共7页
Automation of Electric Power Systems
基金
国家自然科学基金资助项目(51177058
51277084)~~
关键词
串联电容补偿
线路串联补偿度
输电线路
故障特性
电流差动保护
series capacitor compensation
line series compensation degree
transmission line
fault characteristics
current differential protection
