Distributed energy storage system, SOC balance control method and storage medium

The invention provides an SOC equalization control method of a distributed energy storage system, the distributed energy storage system is formed by connecting N storage battery equalization unit series groups in parallel, each storage battery equalization unit series group is formed by connecting M storage battery equalization circuit units in series, the control method can realize SOC equalization of storage batteries in each storage battery equalization circuit unit, and the SOC equalization of the storage batteries in each storage battery equalization circuit unit is improved. The storage battery equalization circuit units are completely equal in hardware and software, so that the capacity configuration of the energy storage system is very flexible, and when the storage battery equalization circuit unit at any position breaks down, the system can still operate normally after the fault module is removed; and meanwhile, overcurrent impact cannot be generated in an internal branch when the system load resist