Patent ID: 8848404

Claim:
A power conversion system, comprising: a DC bus for receiving direct current (DC) power; a line side converter coupled to the DC bus for converting the DC power on the DC bus to alternating current (AC) power; and a voltage source controller for providing control signals to the line side converter to enable the line side converter to regulate the AC power, the voltage source controller comprising: a signal generator to generate the control signals for the line side converter based at least in part on a power command signal and a power feedback signal; an active power regulator for generating an internal frequency command signal based on the power command signal and the power feedback signal, and for generating a phase angle command signal by integrating the internal frequency command signal; a current limiter to, during a transient event, adjust the phase angle command signal based at least in part on an electrical current threshold; and a voltage limiter for adjusting the phase angle command signal based at least in part on a DC bus voltage feedback signal and a DC boundary voltage threshold during the transient event, wherein the voltage source controller is configured to use the phase angle command signal when generating the control signals.