With the increment of working voltage for the long-distancetransmissionline, the switching overvoltage in large power stations is threatening the insulation safety of large generators.
随着远距离输电线路电压等级的提高,大型电站中的操作过电压威胁着大型发电机的绝缘安全。
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This paper has discussed how to select geoidal model and how to determine normal height in GPS survey of longdistancetransmissionline project.
The optical line protection system (OLP) is a long-distance optical transmission network production system, which has a very important practical value.