The battery pack is an independent and reliable operating power supply. It is not affected by the AC power supply, and it can guarantee continuous and reliable operation even in the case of power failure and bus short circuit.
The battery voltage is stable and the capacity is large. It is suitable for various complicated relay protection and automatic devices, and is also suitable for the transmission of various circuit breakers. Therefore, large enterprise substations usually use battery packs for operating power, but battery packs. Operating power requires a lot of auxiliary equipment and special rooms. It has large investment, short life, long construction time, complicated operation and large maintenance workload. Therefore, small and medium-sized substations generally do not use battery packs for operating power, but mostly use rectifier DC. Operating power or AC operating power