引言井下配电系统应满足两个主要要求:第一、供电可靠、少停电。第二,保证井下用电安全。配电系统即根据这两个要求进行选择,但首先应保证安全。在发生接地故障情况下,除裸露金属部件引起触电危险外,在瓦斯矿井还有瓦斯爆炸危险。多年来广泛采用不限制接地故障电流的中性点直接接地的供电系统,导致很大的接地故障电流,在故 Introduction Underground distribution system should meet two main requirements: First, reliable power supply, less power outage. Second, to ensure underground power safety. The distribution system is based on these two requirements to choose, but first of all should ensure safety. In the event of a ground fault, there is also a risk of gas explosion in the gas mine, in addition to the risk of electric shock due to bare metal parts. Over the years widely used to limit the ground fault current neutral point directly grounded power supply system, resulting in a large ground fault current, so