提高地面供电系统耐雷水平的方法

Methods to Improve the Lightning Resisting Level of Power Supply System in Ground

为了防止雷电的危害,保障人身、建筑物及设备的安全,煤峪口矿采用了氧化锌避雷器代替传统的阀型避雷器,并通过优化施工工艺、缩短工艺流程、降低施工成本,有效可靠地降低了杆、塔接地电阻。应用结果表明:有个别接地装置受雷,但都能够有效地接雷,未造成矿井电气设备损坏和大面积停电。此方法提高了线路、电气设备的接雷水平,减少了因供电网发生雷击事故对电气设备、线路、工作人员造成的安全隐患及经济损失。

In order to prevent the harm of thunder and lightning, protect the safety of person, buildings and e- quipment, zinc oxide arrester is adopted to replace the traditional valve type lightning arrester in Meiyukou mine, and by optimizing the construction technology, shortening the technological process, reducing the construction cost, effec- tively reduces pole and tower grounding resistance. The application results show that individual grounding device is at- tacked by thunder and lighting, but can effectively contact the thunder, and it do not caused damage of electrical equipment and large areas blackout in the coal mine. The method improves the lightning withstand level of circuit and electrical equipment, reduces security hidden danger to electrical equipment, circuit and worker and economic losses which caused by supply network lightning accident.