Dc source-to-ac grid tie-in power enhancement using multilevel inverter topology and resonant matrix tank converter

A method for converting an input power into AC, comprising:

• configuring a DC-boost circuit to receive input power from a DC generating source;
• coupling a power inverter to an output of the DC-boost circuit and to an AC grid supply, the power inverter having a plurality of power conversion switches arranged in a stacked configuration having controllable inner and outer switches;
• conveying at least one output voltage from the power inverter, when:
• in an non-inverting switched mode, conveying an AC voltage from power from the AC grid supply;
• in an inverting outer switched mode, conveying an AC voltage from power from the AC grid supply;
• and
• in an inverting outer and inner switched mode, conveying an AC inverted voltage from DC power boosted by the DC-boost circuit;
• coupling at least one of an input switch and an output to the AC grid supply to the at least one output voltage from the power inverter;
• coupling a resonant circuit to the input switch, the resonant circuit being configured for power amplification according to a resonant frequency operation of the input switch and input power;
• coupling at least one of a rectifier and high voltage AC output tap to an output of the resonant circuit;
• coupling a controller to the power conversion switches of the inverter and to the input switch;
• and
• operating the controller to provide a PWM signal to at least one of the power conversion switches and input switch, according to a selected switched mode, to output a converted input power.