Integrated Disturbance Response Modeling of Wind-Integrated Power Systems to Quantify the Operational Reliability Benefits of Flywheel Energy Storage

Rapid growth of renewable power penetration has exposed modern power systems to high operating risks, due to intermittency and uncertainty inherent in such energy sources. It is therefore essential to assess the associated risks and explore potential resources to mitigate these risks. This paper presents a novel approach for response risk evaluation of wind-integrated power system. The proposed approach utilizes a probabilistic integrated disturbance model and introduces a new comparative risk index designated as the Response Risk Multiplication Factor to quantify the impact of increasing penetration of wind power and the contribution of flywheel energy storage system (FESS) on the power system operational reliability. The developed model incorporates the wind-power uncertainty, the specific charge/discharge, storage performance and failure characteristics of FESS and embeds the posterior probability approach to utilize the known information on time of day and FESS SOC. The developed model is applied to the IEEE Reliability Test System to illustrate its usability in assessment of the impact on power system operating risk due to large operating penetration of wind power and effectiveness of FESS in risk mitigation.