接地距离保护中零序补偿系数整定方法的探讨  

Investigation on Setting Method for Zero-sequence Current Compensation Coefficient in Ground-fault Distance Protection

作　　者：冯勇鑫[1] 温渤婴[1] 

机构地区：[1]中国农业大学信息与电气工程学院,北京100083

出　　处：《电力系统及其自动化学报》2008年第3期95-98,共4页Proceedings of the CSU-EPSA

摘　　要：平行线路间零序互感的存在,导致零序补偿系数的值在一条线路上随短路点位置而异。选择尽可能少的零序补偿系数,减少不必要的操作事故是整定过程中的重要问题。基于保护装置由零序电抗和零序电阻补偿系数提出一种零序补偿系数整定算法,建立了几种运行方式下零序电抗和零序电阻补偿系数的数学模型,并通过算例对几种运行方式进行详细比较,结果表明,该算法能正确地为零序补偿系数整定提供依据。Due to the existence of parallel-line zero-sequence mutual, zero-sequence compensation coefficient in one line varies with fault locations. It is important to choose less zero-sequence compensation coefficients to reduce unnecessary operational accidents. Based on separate setting of zero-sequence reactance and zero- sequence resistance compensation coefficient in protection device, an algorithm and a mathematical model of zero-sequence compensation coefficient are proposed. Comparing several operation modes through examples, the result shows that the algorithm can provide basis for the setting of zero-sequence compensation coefficient correctly.

关 键 词：接地距离保护 平行双回线 零序电抗 零序电阻 零序补偿系数 

分 类 号：TM773[电气工程—电力系统及自动化]