10kV配电变压器雷击过电压仿真计算研究

Simulation Research on the Lightning Striking Overvoltage of 10kV Distribution Transformer

为了对配电变压器雷击故障原因进行深入分析,提出合理的变压器保护措施,论文以10kV配电变压器为研究对象,通过对变压器雷击故障类型的分析认为抑制线路侵入波是保护配电变压器的重要途径;分析了变压器参数以及避雷器参数,并用ATP软件建立了直击雷和感应雷过电压模型;针对具有避雷器及不具有避雷器两种情况,计算出了雷击时入侵10kV配电变压器的过电压参数;通过对两种情况下波形和幅值的分析,分别提出了变压器防御直击雷和感应雷的相应措施。

In order to make further research in the cause of the lightning striking trouble of the substation transformer and bring out rational measures to protect the transformer, the 10kV substation transformer was taken as the research object. Restrain the lightning incoming waves is considered as an important way to protect the substation transformer after analyzing the types of the lightning striking trouble of the substation transformer; the parameters of the transformer and lightning conductor was analyzed and the ATP draw emulation model was distributed; the overvoltage parameters of the substation transformer during lightning strike was counted for the two cases with and without surge arrester; the measures to protect the transformer out of the thunder striking overvoltage and the lightning induced overvoltage were proposed after analyzing waveform and amplitude for the two cases.