In this paper, the off-grid voltage control of the three-phase inverter is proposed that provides excellent steady-state and dynamic performance of the output voltage for the application of the 1500V Battery Three-Phase Inverter with consideration of the black start function. State feedback and complex variable resonant controllers are used to achieve based on the state-space model. A soft start control is designed for the black start to avoid the inrush current of the transformer. Simulink simulation results show that the output voltage of the proposed inverter design method tracks the voltage reference without steady-state errors, and has a fast dynamic response.

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