DC Voltage Control In Renewable Energy Based Multilevel Power Converter

摘要

#$%^&*AU2019204315A120200116.pdf#####ABSTRACT According to one aspect, embodiments herein provide a renewable energy-based power converter comprising an input, a high-side DC bus, a low-side DC bus, a first output, an inverter portion configured to convert DC power from the high-side DC bus and the low-side DC bus into output AC power, an interface converter coupled to the high-side DC bus and the low-side DC bus, a first auxiliary DC-DC converter, and a controller, wherein, in a first mode of operation, the DC busses are configured to receive input DC power from the input, and the controller is configured to operate the interface converter to convert DC power from the DC busses into regulated DC power, to operate the interface converter to balance voltage levels of the DC busses, and to operate the first auxiliary DC-DC converter to convert the regulated DC power into first output DC power provided to a DC load.