Study on lightning protection of cables and transformer in Microgrid
The cable and transformer are important distribution equipment in Microgrid. Due to the low insulation level,the insulation of them is easily damaged by lightning. The models of high-frequency transformer and the calculation model of induced lightning with transmission line based on electromagnetic transient calculation software PSCAD/EMTDC are designed in this paper. The lightning protection of cables and transformer in Microgrid,the transferred overvoltage of transformer and the effect of the length of cables and the load types to overvoltage level are researched. The conclusion shows that the induced overvoltage and transferred overvoltage could be reduced efficiently after installing surge arrester at the cables and transformer,but the direct lightning overvoltage is not reduced in the safety range; The longer the cables,the lower the overvoltage is； The inductively load can reduce the overvoltage level slightly while the capacitive and resistance loads has no influence.
Microgrid cables transformer lightning
Hong-qiao Yu Shui-ming Chen Peng-cheng, Yang
State Key Laboratory of Control and Simulation of Power System and Generation Equipment,Tsinghua University Beijing 100084,China
国际会议
南京
英文
1344-1348
2010-09-13（万方平台首次上网日期，不代表论文的发表时间）