煤矿电网分布式区域保护的应用

Application of Distributed Region Protection of Coal Mine Power Grid

目前,煤矿供电系统常采用电流差动、系统判别、集中保护、总线通信等防越级跳闸保护的措施。这几种措施实现成本高、实际操作复杂性高、难以满足相关继电保护规程的标准和要求。在煤矿电网中采用分布式区域保护方式,集中更换或加装矿井井下及关联的地面变电所高压开关综合防越级跳闸等保护装置,可有效减小井下大面积停电,避免引起井下瓦斯积聚,消除威胁矿井的安全事故。

At present, coal mine power supply system often uses preventing override trip protection measures such as current differential protection, system identification, centralized protection and bus communication etc. The cost is high, the actual operation complexity is high and it is hard to meet relevant standards and requirements of the relay protection regulations by using these measures. By using the distributed region protection in coal mine grid, the protection device can effectively reduce the downhole blackouts, avoid downhole gas accumulation, eliminate the threat of mine safety accidents.