中性点空气间隙击穿事故的仿真分析  

Analysis of Neutral Point Gap Breakdown Accident Simulation

作　　者：陆忠心[1] 李卫彬[1] 瞿卫东[1] 丁丁[1] 高勤践 

机构地区：[1]国网上海市电力公司长兴供电公司,上海201913 [2]国网上海市电力公司崇明供电公司,上海202150

出　　处：《电力与能源》2014年第3期317-320,共4页Power & Energy

摘　　要：35kV系统作为配电网的主干网,其运行状况直接关系到客户的用电安全。对一起35kV变电站发生的中性点空气间隙击穿事故,通过查阅事故发生时的天气状况,结合变电站单母线、单主变接线方式,进行了过电压仿真分析和计算。结果表明,发生事故的主要原因是35kV线路遭受雷击,雷电冲击侵入主变压器,导致中性点与A相接线排之间发生空隙放电。在总结这次事故教训的基础上,提出了防范此类事故的技术措施和建议。35 kV system as the backbone network,its performance is directly related to the safe use of electrici-ty customers.The neutral point occurred in 35 kV substation in the air gap breakdown accident phenomenon, by tracing back to the time of the accident the weather conditions,the single bus,single combined substation variable connection mode,the overvoltage calculation and simulation.The simulation results show that,the main reasons of the accidents is the 35 kV line of counterattack,lightning invasion of main transformer neutral point,lead and A wiring row between void discharge.Based on summarizing the accident,puts forward some measures and suggestions for prevention of such accidents.

关 键 词：35KV变电站 雷击 中性点 空隙击穿 

分 类 号：TM86[电气工程—高电压与绝缘技术]