Apparatus and Method for Controlling DC-AC Power Conversion

摘要

An apparatus and method for controlling the delivery of power from a DC source to an AC grid includes an inverter configured to deliver power from the unipolar input source to the AC grid and an inverter controller. The inverter includes an input converter, an active filter, and an output converter. The inverter controller includes an input converter controller, an active filter controller and an output converter controller. The input converter controller is configured to control a current delivered by the input converter to a galvanically isolated unipolar bus of the inverter. The output converter is configured to control the output converter to deliver power to the AC grid. Additionally, the active filter controller is configured to control the active filter to supply substantially all the power that is deliver by the output controller to the AC grid at a grid frequency.

主权项

1. An apparatus for controlling the delivery of power from a unipolar input source to an alternating-current (AC) grid at a grid voltage and a grid frequency, the apparatus comprising:
an inverter comprising:
an active filter configured to supply energy to and absorb energy from a unipolar bus, wherein the unipolar bus is configured such that power is to be delivered from the unipolar input source to the unipolar bus by an input converter and from the unipolar bus to the AC grid by an output converter; and an inverter controller configured to (i) control a power delivered by the input converter to the unipolar bus, (ii) control the output converter to deliver power to the AC grid, and (iii) maintain a voltage of the unipolar bus at a pre-determined value, the inverter controller comprising:
an active filter controller configured to control the active filter to supply time-varying power to the output converter.