具有零序互感的多回输电线路接地距离保护二段整定计算研究  

The Research of Setting and Calculation for the Grounding Distance Protection in Multiloop Transmission Lines with Zero Sequence Mutual Inductance

作　　者：龚序 刘江平 

机构地区：[1]湖北省电力局基建处,湖北省电力局中心调度所

出　　处：《电网技术》1994年第3期28-34,共7页Power System Technology

摘　　要：本文从理论上分析了零序互感对在线路发生各类金属性接地故障情况下的接地距离保护测量阻抗的影响，揭示了零序互感输电线路接地距离保护的区外故障发生超越误动的必要条件，导出了保护第二段防止超越误动的整定计算公式。In this paper, the influence of zero sequence of zero sequence mutual inductance on measured impedance of grounding distanceprotection is analyzed in theory under the situation of metallic grounding fault.The necessary condition of produc-ing misoperation caused by the faults out of the protection range is given for the transmission lines with zero se-quence mutual inductance. The calculation formula for setting of the second section of the protection device to pre-vent the misoperation is given too.

关 键 词：零序互感 距离保护 输电线路 

分 类 号：TM773[电气工程—电力系统及自动化]