Ｒesearch on Overvoltage Protection and Insulation Coordination of 500 kV AC Submarine Cable System
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摘要:
海底电缆造价昂贵、施工检修较为复杂,一旦出现故障,后果严重。而过电压导致的绝缘老化和绝缘击穿是造成电缆故障的重要因素,因此有必要对海底电缆的过电压进行研究。基于镇海—舟山500 k V交流海底电缆工程,建立海底电缆过电压ATP仿真计算模型,对海底电缆系统的暂时过电压、操作过电压和雷电过电压进行了分析和计算,给出了保护措施,并基于计算结果研究了海底电缆的绝缘配合。
Abstract:
Submarine cables is very expensive，meanwhile the construction and maintenance is complicated． Once failure occurs，the consequences are serious． The aging and breakdown of cables caused by overvoltage are the important factors leading to cable fault，so it is of great significance to study the overvoltage of submarine cable system． Based on Zhenhai － Zhoushan 500 kV AC submarine cable project，simulation models for overvoltage calculation of submarine cable is established in ATP， the transient overvoltage，switching overvoltage and lightning overvoltage are analyzed and calculated，and finally the protective measures are given． Based on the simulation results，the insulation coordination of submarine cable system is studied．