| 引用本文: | 王永飞,江 琴,李保宏,等.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(05):82-92.[点击复制] |
| WANG Yongfei,JIANG Qin,LI Baohong,et al.Ultra-low-frequency oscillation suppression method in high-proportion hydro power systems with wind-storage integration[J].Power System Protection and Control,2025,53(05):82-92[点击复制] |
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| 摘要: |
| 针对含风储接入的高比例水电系统中的超低频振荡问题，为增强系统阻尼且不降低水电机组一次调频能力，提出了基于风储侧耦合鲁棒控制的超低频振荡抑制方法。首先，基于复转矩系数法分析了风储接入水电对系统阻尼特性的影响，明确了风机及储能参与超低频振荡抑制的可行性。其次，提出了基于振荡模式分解计算振荡能量的超低频振荡源定位方法，并将振荡源机组的加速功率作为风储侧附加控制的反馈信号，利用最小二乘-旋转不变算法辨识得到多输入多输出系统传递函数矩阵。最后，根据混合H2/H∞鲁棒控制理论，建立考虑阻尼比和控制性能的多目标函数，迭代求解得到风储侧耦合鲁棒控制器最优参数。仿真结果表明，风储系统附加鲁棒控制后，能快速调节不平衡功率并增强超低频段的阻尼，从而有效抑制超低频振荡。 |
| 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 |
| DOI：10.19783/j.cnki.pspc.240783 |
| 投稿时间：2024-06-24修订日期：2024-08-22 |
| 基金项目:四川省自然科学基金青年科学基金项目资助(2024NSFSC0865) |
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| Ultra-low-frequency oscillation suppression method in high-proportion hydro power systems with wind-storage integration |
| WANG Yongfei,JIANG Qin,LI Baohong,LIU Tianqi,ZHANG Yingmin |
| (College of Electrical Engineering, Sichuan University, Chengdu 610065, China) |
| 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 hybri H2/H∞ drobust 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. |
| Key words: wind-storage system ultra-low frequency oscillation damping torque oscillation source localization robust control |
