电力系统保护与控制2025，Vol.53Issue(5)：82-92,11.DOI:10.19783/j.cnki.pspc.240783
风储接入高比例水电系统超低频振荡抑制方法
Ultra-low-frequency oscillation suppression method in high-proportion hydro power systems with wind-storage integration
摘要
Abstract
To address the issue of ultra-low-frequency oscillation(ULFO)in high-proportion hydropower systems integrated with wind-storage,a suppression method based on coupled robust control on the wind-storage side is proposed to enhance system damping without compromising the primary frequency regulation capabilities of hydropower units.First,the impact of integrating wind and energy storage into hydropower systems on damping characteristics is analyzed using the complex torque coefficient method,demonstrating the feasibility of wind turbines and energy storage systems in suppressing ULFO.Next,a ULFO source localization method is introduced,one which calculates oscillation energy based on oscillation mode decomposition.The accelerating power of the oscillation source unit is then used as the feedback signal for additional control on the wind-storage side,and the least squares-rotation invariant technique is employed to identify the transfer function matrix of the multi-input multi-output system.Finally,based on hybrid H2/H∞robust control theory,a multi-objective function that considers both damping ratio and control performance is established,and iterative solutions are applied to determine the optimal parameters of the coupled robust controller for the wind-storage side.Simulation results indicate that the additional robust control of the wind-storage system enables rapid adjustment of unbalanced power and enhances damping in the ultra-low-frequency range,effectively suppressing ULFOs.关键词
风储系统/超低频振荡/阻尼转矩/振荡源定位/鲁棒控制Key words
wind-storage system/ultra-low frequency oscillation/damping torque/oscillation source localization/robust control引用本文复制引用
王永飞,江琴,李保宏,刘天琪,张英敏..风储接入高比例水电系统超低频振荡抑制方法[J].电力系统保护与控制,2025,53(5):82-92,11.基金项目
This work is supported by the Young Scientists Fund of Natural Science Foundation of Sichuan Province(No.2024NSFSC0865). 四川省自然科学基金青年科学基金项目资助(2024NSFSC0865) （No.2024NSFSC0865）
