A black start method and application of cascade energy storage system with self-balancing capability

The invention discloses a black start method and application of cascade energy storage system with self-balancing capability, At a given black start time deltaT, the given value of three-phase alternating voltage output by the cascade energy storage system at the current time is obtained through the black start instruction calculation module, obtaining the modulation voltage of each link power conversion unit of abc each phase through the voltage-current double-loop vector control module, and then superposed with the equalization control voltage component of the corresponding link power conversion unit output from the equalization control module, The total modulation voltage of each link power conversion unit in each phase is obtained, and the pulse driving signals of each power device ofeach link power conversion unit in each phase are obtained through the carrier phase shift sinusoidal pulse width modulation algorithm module. The black start method and application of the cascade energy storage system with s