带串补的同杆并架双回线路零序故障分量对继电保护的影响  

Influence of series compensated double circuits on the same tower zero-sequence component to relay protection

作　　者：薛明军[1,2] 王玉婷 陈福锋[1,2] 邹磊 张祥[1,2] 陈实 

机构地区：[1]国电南京自动化股份有限公司,南京210003 [2]南京国电南自自动化有限公司,南京211153

出　　处：《华电技术》2017年第9期6-9,12,共5页HUADIAN TECHNOLOGY

摘　　要：利用安装串补电容的同杆并架双回线路发生接地故障时的零序序网,分析在串补出口处发生高阻故障且MOV未导通时对两侧保护安装处的零序功率方向元件及零序差动保护的影响。分析结果表明:串补电容可能导致远离串补侧保护的零序功率方向继电器拒动作,另外作为保护高阻接地故障的零序差动保护也可能发生灵敏度降低甚至拒动的情况。仿真试验验证了该理论分析的正确性,并提出了主保护的配置原则。Utilizing installed series capacitor double circuits on the same tower grounding failure zero sequence network,the influence of the zero-sequence power direction element and zero sequence differential protection on the two sides protection installation is analyzed in the case of high resistance failure at the outlet of the string and the failure of the MOV. Analysis indicated that series compensation capacitor may lead to far away from the side of series compensation protection of zero sequence power direction relay from action,as a protection of high resistance earth fault zero-sequence differential protection sensitivity and the lower even refused to move. The simulation test verifies the correctness of the theoretical analysis and puts forward the principle of the main protection.

关 键 词：串联电容补偿 同杆并架双回线路 零序功率方向 零序差动保护 高阻故障 

分 类 号：TM773[电气工程—电力系统及自动化]