煤矿井下杂散电流的防治

Prevention and Dealing of Distributed Current in Coal Mine

在煤矿井下直流架线电机车轨道的运输系统中,在轨道之外无规律性流动的电流称为杂散电流。通过减少钢轨的阻抗,增大通过钢轨的电流;铺设扁钢与钢轨连接,替代钢轨回流;缩短供电半径等方法来减少杂散电流。通过用作电流回路的轨道与不作电流回路的轨道之间加以绝缘、架线的吊线器及拉线绝缘子保持清洁等方法防止杂散电流。

In the underground colliery haulage system of aerial-cable DC driving train, the part of current which flows irregularly beyond the railway is defined as Stray Current. Usually, we can decrease the stray current by limiting the resistance of the steel railway, increasing the current flown through the railway, laying the flat steel that connect to the steel railway to conduct the return current, abridging the radius of power supply. Also, we can avoid the stray current by insulating the parts of the railways which conduct the return current from the parts which do not conduct the return current, and keeping clean of the apparatuses which are used to hung the wires and insulation units.