摘要
根据南方某县城10 kV配电网实际运行中的雷害情况和典型事例,全面分析了该县10 kV配电网的防护现状和雷害原因,线路绝缘水平低、防直击雷措施少、避雷器使用不当和接地不良、雷电过电压和内过电压联合作用是目前该县10 kV配电网雷击跳闸率居高不下的主要原因。提出了10 kV配电网综合防雷措施：规范避雷器的安装维护、改善避雷器和杆塔接地、在塔顶使用避雷针、使用自动消弧装置降低配电网建弧率、限制雷电流过后的弧光接地过电压和铁磁谐振过电压等。
Based on the lightning damage and representative accidents in the operation of a southern town 10 kV distribution networks, the protection status and lighrning harm reason of distribution networks are comprehensive analyzed. Low insulation level of lines, lack of direct lightning protection measures, misemploying of lightning arrester and imperfect grounding, combination actions of lightning overvoltage and internal overvoltage were the main reason of high lightning trip-out rate in distribution networks. The synthesis lightning protective measures including the perfect lightning arrester installation and operation, improvement of lightning arrester and tower grounding, taking use of lightning arrester on the top of tower, reducing the rate of arc generation in distribution networks using automatic tracing arc extinction devices, and limiting the arc over-vohage and the ferroresonant overvoltage caused by lightning are proposed.
出处
《电瓷避雷器》
CAS
北大核心
2010年第4期23-25,29,共4页
Insulators and Surge Arresters
关键词
10kV配电网
防雷措施
改进方案
10 kV distribution network
lightning protection measures
improvement scheme
作者简介
邓文斌（1982-），男，硕士，主要从事电力系统防雷与配电网技术方面的研究。
