井下电缆短路故障检测方法及仿真模拟研究

Detecting Method and Simulation of Short Circuit Fault of Underground Cable

为了提高煤矿井下电缆短路检测要求精确性、及时性,分别对电流有效值检测方法、相敏短路检测方法、电流瞬时值检测方法和电流变化率检测方法进行了分析,电流变化率检测方法满足电缆短路故障检测要求。运用MATLAB数值仿真软件对电流变化率检测电缆短路故障进行了模拟分析,仿真表明电流变化率检测电缆短路故障准确度高,所用时间短,效果理想。

In order to improve the accuracy and timeliness of cable short circuit detection in coal mine,the current effective value detection method,phase sensitive short circuit detection method,current instantaneous value detection method and current change rate detection method are analyzed respectively.The detection method of current change rate meets the requirements of short circuit fault detection of cable.The MATLAB software is used to simulate and analyze the detection of short circuit fault of cable with the rate of current change.The simulation results show that the accuracy of detecting short circuit fault of cable with the rate of electric current change is high,the time used is short,and the effect is ideal.