DUAL CURRENT CONTROLLER FOR DOUBLY-FED INDUCTION GENERATOR

摘要

PURPOSE: A current controller for a doubly-fed induction generator is provided to stably control a DC link voltage in the unbalance voltage condition by controlling a positive-phase-sequence component and a negative-phase-sequence component of a rotor current. CONSTITUTION: A rotor current is classified into a d-axis current and a q-axis current. The d-axis current is classified into a d-axis ordinary component and d-axis negative-phase component. The q-axis current is classified into a q-axis ordinary component and a q-axis negative component. The d-axis ordinary component of the rotor voltage is calculated by using the d-axis normal reference value of the rotor current and the error of the d-axis ordinary component. The d-axis negative-phase component of the rotor voltage is calculated by using the d-axis reverse phase reference value of the rotor current and the error of the d-axis negative-phase component.