摘要
为了解交联聚乙烯电缆承受的操作冲击过电压,完善电缆保护器的配置和选型方法,根据广州电网实际情况构造了ATP(电磁暂态计算程序EMTP的ATP版本)电缆金属护套接地和电缆与外部设备典型结线方式下电缆系统的计算模型,并采用电磁暂态仿真软件ATP-EMTP,对电缆系统上中常见的3种操作过电压(合闸空载线路、单相接地、三相甩负荷过电压)进行了仿真计算。实际电缆线路上进行的冲击试验验证了模型的正确性。最后在过电压计算、参数分析及冲击试验的基础上,提出了电缆保护器的配置和选型方法。
Based on the typical cable sheath grounding style on Guangzhou power grid and the cable connecnon style with power system, the ATP models of calculating switching overvoltage on cable sheath are set up, 3 typical switching overvoltages of cable sheath under closing transmission line to power system, single phase grounded, and 3- phase load turned off, are simulated by the ATP-EMTP. To verify the correctness of models and calculation and analysis results, the authors performed several impact trials in the real cable line of Guangzhou power grid system. On the basis of simulation, analysis of parameter and model, and the impact tests, the authors put forward the principles of selection of cable protector.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2007年第10期147-150,共4页
High Voltage Engineering
