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集安县三家电站共有4台机组,除一台1,250千瓦机组配有永磁发电机外,其余3台500千瓦机组均按规定未配置永磁发电机,这样就无法装设一般的电气过速保护装置来解决机组的过速问题。目前在小水电站中对无永磁发电机的机组,都采用水电阻的方法来限制机组的过速,但这种方法有一定的局限性。如有自动调速器的机组用手动开机时,在手动切换
There are 4 units in Ji’an County’s three power stations. Except for a 1,250-kilowatt unit equipped with a permanent-magnet generator, the remaining 3 units of 500-kilowatt units are not equipped with permanent-magnet generators in accordance with the regulations, so that general electrical over-speed can not be installed Protection device to solve the unit over-speed problem. Currently in small hydropower stations without permanent magnet generator units, water resistance methods are used to limit the unit over-speed, but this method has some limitations. If the automatic governor of the unit with the manual boot, the manual switch