Control study of inverse system for doublyfed VSCF wind power generation

ZHANG Suxin, ZHANG Jiyong
(Energy & Power Engineering Institute, Yangzhou University, Yangzhou 225127, China)

Abstract: In order to slove the problem that the vector control methods in doublyfed wind power generation depend on motor parameters and is unstable under disturbance, the technology of inverse system was applied in the control of doublyfed induction generator(DFIG). According to the equation of the input and output state,the expression of inverse system was acquired, and the closedloop control system of wind power generation was established. Through the software Matlab, the system when the phase voltage dropped and operating in variable speed constant frenquency(VSCF) was simulated. The simulation results show that the control system can maintain unity power factor and control the DC link voltage steabily, achieve the decoupling of active and reactive power.
Key words: doublyfed induction generator(DFIG); vector control; inverse system; variable speed constant frenquency(VSCF)