Patent ID: 8358031

Claim:
A power conversion system comprising: a photovoltaic source to generate direct current (DC) power; a direct current (DC) to an alternating current (AC) single stage inverter to convert the direct current (DC) power from the photovoltaic source to alternating current (AC) power for delivery to a power grid; a voltage sensor to obtain a voltage component of the alternating current power; a load balancing unit coupled to the single stage inverter; and a controller configured to: determine a maximum power point for the power conversion system; compute a difference between the voltage component of the alternating current power and a desired regulated grid voltage; use the difference between the voltage component of the alternating current power and the desired regulated grid voltage to generate a control signal for the single stage inverter to drive the voltage component of the alternating current power towards the regulated grid voltage; compute a power balance difference between a power demand from the power grid and an output power of the single stage inverter obtainable at the maximum power point; and control in real-time the load balancing unit based on the power balance difference.