A Sub-Synchronous Oscillation Suppression Strategy for Doubly Fed Wind Power Generation System

 Abstract

IEEE Power Electronics Projects A Sub-Synchronous Oscillation Suppression Strategy for Doubly Fed Wind Power Generation System addresses the issue of sub-synchronous oscillation that can occur in the power transmission of doubly-fed induction generator (DFIG), particularly due to the series compensating capacitance and long-distance transmission.

IEEE Power Electronics Projects The paper establishes a mathematical model of the DFIG system and discusses the cause of sub-synchronous oscillation and its effect on the control strategy. An improved PLL is proposed to address the performance degradation of the conventional phase-locked loop (PLL) under sub-synchronous oscillation. In addition, quasi-resonant control is added to improve the performance of the PLL under sub-synchronous oscillation. Experimental results demonstrate the effectiveness of the proposed strategy.

Keywords

Doubly fed induction generator, Sub-synchronous oscillation, Rotor side converter, Stator side converter, Phase-locked loop, Quasi resonance controller