浅析煤矿配电网中性点接地

The Advantages of High Resistance GroundingUsed in Coal Mine Power Grid

伴随我国煤矿配电网技术的发展,诸如济三煤矿等大型矿井的配电网已由老式的以架空线路为主的布局,逐渐转变为以电缆为主的新型网路。并且,大量紧凑型的配电设备(如SF6集成断路器、紧凑封装刀闸的真空断路器)、铠装聚乙烯电缆及高性能氧化锌避雷器的广泛使用,使原有的接地方式,已不能满足当前矿井配电网系统的需要。

With the development of our National Grid,the Power Supply and Distribution Grid of Large-scale coal mine like Jisan Coal Mine.had been changed from overhead transmission .ines to power cable.At the same time, with the extensive application of some closed compact switchgear （as SF6 circuit breaker, High-performance vacuum circuit breaker）, Polyethylene eable,MOA,the original non-effective grounding could not adapt to the current development of the power system needs.