屯兰矿白草塔35 kV变电站二次系统防雷改造

Transformation of secondary system in Baicaota 35 kV transformer substation of Tunlan Mine

对屯兰矿白草塔35 kV变电站二次系统遭受雷击的原因和变电站接地网状况进行了探讨分析,提出了变电站二次系统防雷的措施和要点,通过对变电站二次系统设置独立低阻值抗腐蚀接地网,对一、二次设备接地进行严格分离和对二次设备电源构建三级防雷等措施,有效解决了白草塔35 kV二次设备因雷电影响而频繁故障的问题,对此次防雷改造进行了总结分析。

Reasons of lightening and conditions of grounding grid in 35kv transformer substation of Tunlan Mine were explored and analyzed, measures and keys of lightning protection for substation secondary system were proposed. Through setting separate low resistance corrosion resistance of grounding grid in secondary system, making strict separation for primary and secondary equipment grounding, as well as building three-level lightning for power supply of secondary equipment, frequent failures of 35kv secondary equipment due to lightning were improved. At the same time, this transformation of lightening protection was summarized and analyzed.