主变压器是小水电站的主要电气设备之一,但也是消耗能量最大的电气设备,它不但在传递能量的过程中要消耗功率,而且在空载时也要消耗功率。对于径流电站(发电时间长短不定),特别是年利用小时数较低的电站,变压器仍处于空载状态。变压器投切自动控制线路,就是针对上述情况而设计的一种节能 The main transformer is one of the major electrical equipment for a small hydropower station, but it is also the one that consumes the largest amount of energy. It consumes power not only in the process of transferring energy, but also in idle. For run-of-river power stations (variable generation times), especially for those plants with low annual utilization hours, the transformer is still in a no-load condition. Transformer switching automatic control circuit, is designed for the above situation and a kind of energy-saving