电力系统保护与控制Issue(10)：90-95,6.
煤矿井下高压电网过流保护整定计算方法的改进研究
Improvement and research on the setting calculation method of overcurrent protection of the underground high-voltage distribution network of coal mine
摘要
Abstract
In order to improve the reliability of overcurrent protection of coal mine, for 6 kV outlet switch of substation of all levels, this paper gives an improved setting calculation method of overcurrent protection. It analyses the shortcomings of traditional method and introduces setting calculation process of the new method. The new method uses the line ampacity to set the timing overcurrent and overload protection, and introduces the judging method of setting instantaneous overcurrent protection or not. Taking the timing overcurrent protection as an example, it introduces the processing method when sensitivity does not meet the requirment. Finally, the local power supply system of a mine of Henan Da You Energy is taken as an example to calculate and demonstrate, and then make analyses. The results show that the new method is effective and practical, and it can guarantee the overcurrent protection device action reliably, so as to improve the reliability of overcurrent protection.关键词
过流保护/改进的/整定计算/新方法/载流量/灵敏度/有效Key words
overcurrent protection/improved/setting calculation/new method/line ampacity/sensitivity/effective分类
信息技术与安全科学引用本文复制引用
马星河,李林蔚,李自强,韩鹏举..煤矿井下高压电网过流保护整定计算方法的改进研究[J].电力系统保护与控制,2014,(10):90-95,6.基金项目
中国博士后科学基金 （）
