变压器式可控高抗对线路差动保护的影响及对策研究  

A study of effect of controllable shunt reactor of transformer type on line differential protection and countermeasures

作　　者：刘革明[1] 杨琰[1] 吴殿峰[1] 周启文[1] 胡习 徐晓春[1] 朱晓彤[1] 

机构地区：[1]南京南瑞继保电气有限公司,江苏南京211102

出　　处：《电力系统保护与控制》2015年第16期133-138,共6页Power System Protection and Control

摘　　要：通过研究变压器式可控高抗工作原理,分析了线路上并联了变压器式可控高抗后对线路差动保护的影响,比较了几种解决方案的优缺点。提出适用于并联了可控高抗输电线路的时域电容电流补偿计算方法。该方法可以满足长距离超高压线路差动保护暂态补偿电容电流的要求,提高差动保护的灵敏度。提出配置带补偿和不带补偿功能的差动保护方案,有效地保证了可控高抗CT异常时差动保护的可靠性。通过工程应用验证了适用于并联了可控高抗输电线路的时域电容电流补偿计算方法的可行性。Through the study of Controllable Shunt Reactor of Transformer Type （CSRT）, the effect of CSRT used on transmission line for line differential protection is analyzed and different solutions are proposed and compared. A new method of time domain compensation for CSRT used on transmission line is presented. The transient capacitive current compensation requirements and high sensitivity of line differential protection are satisfied by this method. High reliability of line differential protection is ensured by the configuration with and without compensation in parallel while CT installed on CSRT is abnormal. The feasibility for the method above is verified by an engineering application.

关 键 词：可控并联电抗器 变压器式可控高抗 线路差动保护 电容电流补偿 时域补偿 

分 类 号：TM773[电气工程—电力系统及自动化]