Dynamic Stability Improvement of Synchronous Generator Using Suggested Controller in Reactive Power Band Of DFIG

Ensuring the stability of synchronous generators is a fundamental challenge in modern power systems, particularly as grid dynamics become increasingly complex. Generator stability is typically classified into three categories: steady-state, dynamic, and transient. This study focuses on dynamic stability, which pertains to the system’s ability to maintain synchronism following small disturbances. In parallel, the growing demand for clean energy and the depletion of fossil fuel reserves have accelerated the integration of wind energy into the power grid. Among the various wind generation technologies, the Doubly-Fed Induction Generator (DFIG) has gained prominence due to its operational flexibility and controllability. This paper proposes a control strategy designed to enhance the dynamic stability of synchronous generators using the reactive power control capability of the DFIG. The suggested controller employs two key feedback signals: the rate of change of rotor speed in the synchronous generator and the electromagnetic torque generated by the DFIG. These feedback loops are used to regulate reactive power injection dynamically. The effectiveness of the proposed method is validated through simulations conducted on a test power network subject to two different disturbance scenarios. The results confirm that the controller significantly improves the dynamic response and enhances the overall stability of the synchronous generator.

کلیدواژه ها:

dynamic stability ، synchronous generator ، Doubly Fed Induction Generator (DFIG) ، Reactive Power Band of DFIG ، Speed Derivation Feedback ، DFIG Electromagnetic Torque Feedback