A Comprehensive Analysis of Subsynchronous Resonance in Wind Power System: Effects of Series Compensation, Wind Speed, and Modes

This article explains the detailed effect of the subsynchronous resonance (SSR) phenomenon in the doubly fed induction generator (DFIG)-based wind power system (WPS) using the IEEE First Benchmark Model (FBM) as the studied system. SSR poses a serious risk to system stability in power systems adopting renewable energy sources. The primary goals of this novel investigation encompass the identification of distinctive frequency modes associated with SSR in DFIG-based WPS and to investigate the effects of varying series compensation levels and wind speeds on various system modes, such as supersynchronous, subsynchronous, electromechanical, shaft, and system modes. It is found that electromechanical modes usually react to changes in wind speed, while subsynchronous modes are sensitive to both compensation and wind speed changes. Moreover, this paper studies the influence of variations in series compensation levels and wind speed on the stability of the system. The findings indicate that system stability is achieved when series compensation is below 50%, whereas instability ensues when the compensation exceeds 50% at 8 m/s wind speed. Moreover, this study offers a new understanding of the SSR behavior of DFIG-based WPS, specifically within the context of the IEEE FBM. IEEE First Benchmark Mode ensures the applicability and comparability of the findings in a standardized framework. These findings can help grid operators, power system engineers, and wind farm developers establish strategies to improve system stability and reliability when integrating renewable energy sources.