At present, the power supply of distribution line automation equipment mostly adopts two methods: voltage transformer and solar battery. The output capacity of the voltage transformer for 10 kV system operation is above 300 VA, and the no-load loss is as high as 8 W, which greatly exceeds the demand of automation equipment. At the same time, its damage rate is relatively high, which directly affects the reliability of power supply; and the cost is high. Heavy weight and high installation cost. Another power supply method is solar cells, which are obviously affected by climatic conditions and require regular battery replacement.
