CONTROL METHOD FOR VOLTAGE PHASE SYNCHRONIZATION OF DOUBLY FED INDUCTION GENERATOR

摘要

A control method for voltage phase synchronization of a doubly fed induction generator is provided to obtain an output voltage such as a sine wave by applying a current to a rotor of a generator based on a slip electrical angle. A power electrical angle is detected by using a voltage of a system power(S110). A rotor electrical angle is detected by using speed information of the rotor(S120). A first slip electrical angle is calculated by using the rotor electrical angle and the power electrical angle(S130). A current is applied to the rotor by using the first slip electrical angle(S140). An output voltage of a stator is detected(S150). The output voltage of the stator is compared with the voltage of the system power(S160). A stator electrical angle is calculated by using the output voltage of the stator(S170). A phase difference of the voltage of the system power is calculated by using the power electrical angle and the stator electrical angle(S180). A second slip electrical angle is obtained by again calculating the first slip electrical angle based on the phase difference(S190).