POWER CONTROL SYSTEM FOR WOUND-ROTOR INDUCTION GENERATOR

PURPOSE:To control effective and reactive power at stator side stably with high speed by determining coordinate axis, with reference to the effective flux of a wound-rotor induction generator, based on current and voltage at stator side and then regulating current of rotor winding based on the coordinate axis. CONSTITUTION:A wound-rotor induction generator 23 is linked through a circuit breaker 21 with a power source system 19, while a cyclo-converter 22 receives power through a transformer 20 and feeds exciting current to the rotor of the induction generator 23. Effective and reactive power P1, Q1 of the power system 19 are detected by an effective/reactive power detector 16 through current and voltage detectors 17a, 18 and compared. Differences of effective power and reactive power P1'-P1, Q1'-Q1 are fed to effective power regulator 7 and reactive power regulator 8 comprising proportion/integration regulators, and a rotor T-axis current command value iT2' and a rotor M-axis current command value iM2 are outputted. When these command values are compared with actual values, a high speed stable control system can be realized easily.