A Rotor Voltage Compensation Method for Transient Voltage Dip in Grid‐Connected Power Systems With A High Proportion of Renewable Energy Under Ramp‐Type Gradual Disturbance

Ramp‐type progressive disturbances induce transient voltage dips in grid‐connected power systems with high renewable energy penetration, leading to difficulties in the coordinated control of multi‐source power electronics and a delayed voltage recovery response. To address this issue, this paper proposes a compensating control method for transient voltage dips in such systems under these disturbances. Based on the mathematical model analysis of the rotor side of a doubly fed induction generator (DFIG), we propose a rotor voltage compensation control strategy for the rotor‐side converter during transient voltage dips. The strategy compensates for the rotor transient electromotive force and negative sequence electromotive force by controlling the output voltage of the AC side of the converter. Simulation results demonstrate that this control strategy effectively eliminates the double‐frequency fluctuation of rotor current during mild grid asymmetrical faults and significantly reduces the voltage recovery time. In cases of severe asymmetrical faults, it suppresses the rotor current surge and enhances the low‐voltage ride‐through capability of DFIG‐based wind turbines. The proposed method improves the voltage stability of grid‐connected power systems with high renewable energy penetration under complex operating conditions, ensures reliable power system operation, and facilitates the large‐scale integration and efficient utilization of renewable energy.