Resonance Stability Analysis of Hydropower Plant Using Modified RH Criteria in Consideration of Sub-Synchronous Oscillation

Hydropower is an important source of renewable energy, providing reliable and flexible electricity generation. To improve power transmission efficiency, series compensation is commonly used to increase power transfer capacity. However, this method can also cause sub-synchronous oscillations (SSOs), which may affect the stability of the system. This paper aims to investigate the resonance stability of hydropower systems and provide a modified criterion for assessing their stability in consideration of sub-synchronous oscillations. The research focuses on the application of series compensation to increase power transfer capabilities with impact on the stability of hydropower systems under various operating circumstances. The paper first presents a brief overview of hydropower systems and their importance in the renewable energy sector. To check the impact of series compensation to investigate resonance stability though time domain simulation MATLAB/Simulink environment study. It then discusses the concept of resonance stability and the factors that can affect it, such as sub-synchronous oscillations. The RH stability criterion are then introduced as analysis tools for assessing the stability of hydropower systems.