切空载变压器过电压仿真计算

Simulation Calculation of Overvoltage Caused by Switching off Unloaded Transformer

对10 kV及以下配电系统中各种不同的接线方式下,切空载变压器所产生的截流过电压进行了研究。采用ATPDraw程序,建立了不同接线方式下切空载变压器的计算模型,考虑了不同型号的变压器与不同长度电缆的组合,计算了所产生的过电压,给出了能否取消避雷器应视具体情况而定的结论。

This paper studies the closure of overvohage caused by switching off an unloaded transformer for 10 kV and below distribution system in a variety of connection mode. ATPDraw procedures are used to establish a calculated model in a different way of wiring after switching off a no-load transformer. Taking into account the combination of various types of transformer and cables of different length, the paper calculates the overvoltage and gives a conclusion that whether to adopt the arrester or don＇ t should be chosen in accordance with specific factors.