配电变压器“双地网”防雷有效性研究  

Research on feasibility of double grounding network lightning protection of distribution transformers

作　　者：程文锋 喇元 彭发东 胡贤德[2] 周浩[2] 施纪栋[2] 

机构地区：[1]广东电网电力科学研究院,广东广州510600 [2]浙江大学电气工程学院,浙江杭州310027

出　　处：《能源工程》2014年第1期52-56,共5页Energy Engineering

摘　　要：从实际出发,分析了配电变压器采用"双地网"接地方式所引起的故障,计算得出了电源防雷箱防雷效果不明显,双地网并不能够有效隔离高、低压接地网的结论。并以此为中心,分析了配电变压器防雷思路,提出了有效的配电变压器防雷方法,建议在配电变压器防雷保护中将"双地网"改成"三点一地"接线方式,高、低压侧均装设避雷器。The equipment failures of distribution transformers with double grounding network were analyzed. The results strongly rejected the statement that double grounding network can effectively isolate the high and low voltage grounding grid. Besides, the result was gotten that lightning effects of power lightning protection box in lowvoltage side were not satisfactory. In addition, it was put forward the effective distribution transformers lightning protection method and in stallation of lightning arresters was necessary in both highvoltage side and lowvoltage side.

关 键 词：配电变压器 双地网 防雷 

分 类 号：TM421[电气工程—电器]