摘要
为解决高比例新能源并网系统在发生负荷扰动时出现的频率跌落的问题,提出一种风电与双馈变速抽蓄机组的频率协调控制策略。首先建立系统频率响应模型,利用滑模预测控制使风电和双馈抽蓄机组对电网频率进行支撑;其次,引入转速释放函数使风电机组合理释放自身转子动能;然后,调制风电机组转速恢复曲线,并将风电机组转子动能变化与双馈抽蓄机组的功率参考值关联,构建二者协调控制机制,通过双馈抽蓄快速响应的二次出力补偿风电转速恢复阶段的功率缺额,以应对传统控制策略难以解决的频率二次跌落问题;最后在Matlab/Simulink中搭建系统仿真模型,以验证该策略的有效性。仿真结果表明,在多种场景下该策略均具有更好的调频效果,并消除了频率二次跌落和同步发电机组的出力波动。
To address frequency drops under load disturbances in power systems with high renewable penetration,this paper proposes a coordinated frequency control strategy combining wind power and variable-speed pumped storage units.Firstly,a system frequency response model is developed,where sliding-mode predictive control enables both wind turbines and pumped storage units to support grid frequency regulation.Subsequently,a controlled rotor kinetic energy release scheme is introduced to manage the wind turbine’s inertial response.Furthermore,the wind turbine’s speed recovery curve is modulated by mapping the rotor kinetic energy variation to the power reference of the variable-speed pumped storage unit,establishing a coordination mechanism.This allows the fast secondary power response of the pumped storage unit to compensate the power deficit during wind turbine speed recovery,effectively mitigating secondary frequency drops that challenge conventional strategies.The proposed approach is validated via Matlab/Simulink simulations,demonstrating superior frequency regulation performance across scenarios,with eliminated secondary frequency drops and synchronous generator power oscillations.
作者
罗远翔
张楠
蔡麟书
闫钦勇
Luo Yuanxiang;Zhang Nan;Cai Linshu;Yan Qinyong(School of Electrical Engineering,Northeast Electric Power University,Jilin 132012,China)
出处
《太阳能学报》
北大核心
2025年第8期727-736,共10页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(52377082)
吉林省教育厅科学研究项目(JJKH20230123KJ)。
关键词
风电
频率响应
储能
电网频率控制
可再生能源
抽水蓄能机组
wind power
frequency response
energy storage
electric frequency control
renewable energy
pumped storage power plants
作者简介
通信作者:罗远翔(1975-),女,博士、副教授、硕士生导师,主要从事电力系统稳定及大规模可再生能源并网方面的研究。yuanxiangluo@163.com。
