基于自适应的煤矿动力电缆漏电检测方法

我国煤矿井下供电系统中性点普遍采用经消弧线圈的接地方式,这种接地方式增加了漏电保护整定的复杂性.针对目前煤矿井下供电系统漏电保护整定难度大、可靠性差等技术问题,提出了采用自适应欠补偿方式、及时整定的漏电保护方案,并结合温度、湿度变化选择不同的修正系数,实现自适应的煤矿动力电缆漏电检测.采用Matlab 7中的Simulink对中性点经消弧线圈的供电系统建模,并进行了仿真试验,仿真结果表明,该方案能够提高漏电故障检测的可靠性.

Research on detection method of coal power cable leakage based on adaptive

The grounding mode by arc suppression coil is widely used for the neutral of an underground power supply system in coal mine of our country, increased setting complexity of leakage protection. Aiming at the technical problems of difficult setting, poor reliability for the leakage protection of coal mine underground pow- er supply systems, the paper presents the leakage protection scheme using the adaptive owe compensation mode, timely adjusting, and choosing different correction coefficients combined with the temperature, the hu- midity change, to realize adaptive leakage detection for coal power cable. The modeling of a power supply sys- tem with neutral grounding by arc suppression coil has been done by using the Simulink of Matlab 7, and the simulation test has been completed . The simulation result shows that the method can effectively improve the re- liability of leakage protection.