Title :
Control of front-end three-phase boost rectifier
Author :
Hiti, Silva ; Boroyevich, Dushan
Author_Institution :
Virginia Power Electron. Center, Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
Modeling and control of a three-phase PWM boost rectifier is presented. A current controller in rotating coordinates assures unity input power factor and fast output voltage regulation. Sensitivity of stability margins to different loads is analyzed. Two typical loads, a DC-DC power converter and an inverter supplying an AC motor, are considered. Linear and nonlinear current controllers in the direct axis are compared. With the nonlinear controller, which employs load current feedforward, the rectifier sensitivity to load variations is greatly reduced and a single optimal output voltage compensator can be designed for all load conditions. Small-signal output impedance is significantly improved, and faster transient response is obtained. The results are illustrated with simulations of a practical 10 kW rectifier
Keywords :
control system analysis computing; digital simulation; electric current control; linear systems; load (electric); nonlinear control systems; power convertors; power engineering computing; power factor correction; pulse width modulation; rectifiers; rectifying circuits; sensitivity analysis; transient response; voltage control; 10 kW; AC motors; DC-DC power converter; computer simulation; inverters; linear current controllers; load variations; nonlinear current controllers; output voltage regulation; rotating coordinates; sensitivity; small-signal output impedance; stability margins; three-phase PWM boost rectifier; transient response; unity input power factor; AC motors; DC-DC power converters; Load management; Optimal control; Pulse width modulation; Pulse width modulation inverters; Reactive power; Rectifiers; Stability analysis; Voltage control;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1994. APEC '94. Conference Proceedings 1994., Ninth Annual
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-1456-5
DOI :
10.1109/APEC.1994.316307
