Mode Switchover Strategy for Multi-port Energy Router Based on State Flow Diagram

Up to now, the control strategies of most energy routers are only designed for normal operating conditions, and not designed for failure of a certain module of the system. This paper proposes a switching control strategy for the energy router based on the sudden failure of a certain module of the energy router. The strategy will detect the operating status of each converter. When a converter fails, the system will shut off the converter in time, so that the remaining converters can continue to work and the system bus voltage can be maintained. The system will restore the module automatically when fault of the module is eliminated. Simultaneously, if the energy storage module's power is too high or too low, the system will halt charging and discharging in order to safeguard the energy storage module. Finally, the validity of the above theory is verified through experiments.