雷电波沿着输电线路侵入变电所，对变电所设备构成了很大的威胁。
Lightning surge intrudes substation along transmission line, which is the threat to the equipments within substation.
微机保护系统是电力系统的重要组成部分，但由于其耐压水平低，雷电波侵入电源系统时易导致设备的损坏，严重影响了电力系统的正常运行。
But the invasion of lightning surge may lead its failure due to its low voltage withstand level which may affect the normal service power system.
依据雷电波侵入变电站微机电源的途径，建立模型，并进行了分析。
A model was build and experimented along the path of lightning surge invasion.
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