Power conversion system with transient event ride-through capability and method thereof

摘要

An exemplary power conversion system is disclosed including a DC bus for receiving DC power; a line side converter electrically coupled to the DC bus for converting the DC power to AC power; and a voltage source controller to provide control signals to enable the line side converter to regulate the AC power. The voltage source controller comprises a signal generator to generate the control signals based at least in part on a power command signal and a power feedback signal. The voltage source controller further comprises a current limiter to, during a transient event, limit the control signals based at least in part on an electrical current threshold. The voltage source controller further comprises a voltage limiter to, during the transient event, limit the control signals based at least in part on a DC bus voltage feedback signal and a DC boundary voltage threshold.

主权项

1. 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; anda 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.