Patent ID: 9362841
Filing Date: 2016-06-07
CPC Classification: H02M,H02P

Claim Text:
1. A power conversion system comprising: a current source converter configured to convert Alternate Current (AC) power to Direct Current (DC) power; a power controller configured to set a d-axis current command and a q-axis current command, which correspond to the AC power to the current source converter, by reflecting a difference between a measurement DC link voltage measured at an output terminal of the current source converter and a reference DC link voltage set by a DC link voltage command; a phase angle controller configured to adjust a phase angle of the current source converter and transmit the adjusted phase angle to the current source converter, in response to the d-axis current command and the q-axis current command; a thyristor inverter connected to the output terminal of the current source converter configured to inverse convert an output of the current source converter to AC power and apply the inverse-converted AC power to a load; and a beta controller configured to control turning-on of a thyristor of the thyristor inverter by adjusting a rectifying angle, the rectifying angle calculated from an effective current and an invalid current of the load.