A novel inertial control method suitable for doubly fed induction generator considering stability constraints

摘要

In this paper, a novel inertial control method for Doubly Fed Induction Generator (DFIG) is proposed,rnnamely mode conversion. An excellent inertial response performance is obtained by adopting the modernconversion method. DFIG operating mode can be switched between normal operating mode and inertialrnresponse mode by setting logic judgment conditions to start and block inertial control. Constant additionalrnelectromagnetic torque is set in this method, and the effect of inertial response does not recede with decreasernof rotor speed. Rotor speed stability constraints for DFIG are considered in the method; the minimum rotorrnspeed limit is determined through stability analysis of DFIG in its inertial response process. A simulationrnmodel is built to demonstrate the advantages of the proposed method. Simulation result shows that the modernconversion method can more effectively restrain the system frequency decline than existing inertial controlrnmethods within the stability operation constraints of the DFIG. Copyright © 2015 John Wiley & Sons, Ltd.