摘要
分析了目前矿井低压电网漏电保护系统存在的不足 ,提出了基于附加直流电源检测和零序功率方向的漏电保护新判据 ,介绍了基于这些新判据的智能漏电保护装置 ,该装置构成的可通信式漏电保护系统可以实现无级差的选择性漏电保护 。
Based on the overview of ground fault protection systems for underground LV distribution networks,this paper analyzes disadvantages of ground fault protection systems being used currently.The new criteria of ground fault protection,which are based on additional DC power supply and direction of zero sequence power,are put forward.These action criteria are of very good selectivity to ground fault.The intelligent ground fault protection devices using these new criteria are developed.These devices can form a communication capable ground fault protection system.Consequently,the selective ground fault protection that has no time difference and enhanced levels of safety for underground LV distribution networks can be realized.
出处
《电工技术学报》
EI
CSCD
北大核心
2003年第1期82-86,共5页
Transactions of China Electrotechnical Society
基金
国家自然科学基金资助项目 (5 0 0 770 2 2 )
