谐波方向原理在矿井高压电网接地选线系统中的应用  

The Application of Fifth Harmonic Direction Principle to the Single-phase-grounding Protection System of Underground HV Distribution Networks

作　　者：孟润泉[1] 米建军 杨毅[1] 

机构地区：[1]太原理工大学,山西太原030024 [2]山西电子高级技工学校,山西太原030025

出　　处：《太原理工大学学报》2004年第2期168-171,182,共5页Journal of Taiyuan University of Technology

基　　金：省教委高新技术产业化项目(197 101029)

摘　　要：在分析矿井高压电网接地故障规律及现有接地选线装置失效原因基础上,阐述了适于对各种中性点接线方式电网进行接地选线保护的谐波方向原理。作为该原理的具体应用,介绍了一种基于五次谐波检测的井下高压接地选线系统。The installed selective grounding protector in underground HV networks cannot work properly owing to the application of the arc-suppression coil, by which the grounding current is compensated. On the basis of analyzing the law of ground fault, this paper expounded the protection principle based on the fifth harmonic derection, which is suitable for all kinds of underground HV distribution networks. As an example of application, a kind of selective single-phase-grounding protection system of underground HV distribution networks is introduced.

关 键 词：井下高压电网 接地选线保护 零序电压 零序电流 五次谐波 微控制器 

分 类 号：TM564.8[电气工程—电器]