引用本文:杨伟峰,文云峰,李立,王康,迟方德,张武其.考虑疲劳载荷的风电场分散式频率响应策略[J].电力自动化设备,2022,42(4):
YANG Weifeng,WEN Yunfeng,LI Li,WANG Kang,CHI Fangde,ZHANG Wuqi.Decentralized frequency response strategy for wind farm considering fatigue load[J].Electric Power Automation Equipment,2022,42(4):
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考虑疲劳载荷的风电场分散式频率响应策略
杨伟峰1, 文云峰1, 李立2, 王康2, 迟方德2, 张武其1
1.湖南大学 电气与信息工程学院,湖南 长沙 410082;2.国网陕西省电力公司电力调度控制中心,陕西 西安 710049
摘要:
风电场参与调频时会增加风机的疲劳载荷,导致风电场维护成本上升、运营效益下降。为此,提出一种考虑疲劳载荷的风电场分散式频率响应策略,可在维持风电场调频性能的同时,降低风机疲劳损伤。为实现该目标,首先分析风电场调频及有功控制结构,推导风机线性动力学模型,并构建考虑疲劳载荷的单机频率响应模型。然后基于Jensen尾流模型,推导风电场由尾流波动产生疲劳载荷的解析式,并结合单机模型构建风电场频率响应模型。为减少风电场中央控制器计算压力,采用目标级联分析法将原集中式优化问题拆分成主问题(中央控制器)和多个子问题(本地控制器),建立分散式频率响应策略。最后在MATLAB/Simulink中搭建含80台单机容量为5 MW双馈风机的IEEE RTS-79系统,并通过仿真验证所提策略的有效性。
关键词:  风电场调频  风机  目标级联分析法  疲劳载荷  尾流效应
DOI:10.16081/j.epae.202201003
分类号:TM614
基金项目:国家自然科学基金资助项目(52077066);湖南省自然科学优秀青年基金资助项目(2020JJ3011);国网陕西省电力公司新能源消纳科技专项(SGSN0000TKJS2001710)
Decentralized frequency response strategy for wind farm considering fatigue load
YANG Weifeng1, WEN Yunfeng1, LI Li2, WANG Kang2, CHI Fangde2, ZHANG Wuqi1
1.College of Electrical and Information Engineering, Hunan University, Changsha 410082, China;2.Dispatch and Control Center of State Grid Shaanxi Electric Power Corporation, Xi’an 710049, China
Abstract:
The fatigue load of wind turbines increase when wind farms participate in power system frequency regulation, which leads to the increase of maintenance cost and decrease of operation benefit of wind farm. Therefore, a decentralized frequency response strategy for wind farm considering fatigue load is proposed, which can effectively reduce the fatigue damage of wind turbines while maintaining the frequency regulation performance for wind farm. To achieve this objection, firstly the structure of frequency regulation and active power control for wind farm are analyzed. The linear dynamic model of wind turbine is derived, and the single-unit frequency response model with load is constructed. Then, the analytic expression of fatigue load caused by wake flow fluctuation is derived based on Jensen’s wake flow model, which makes the single-unit model extend the frequency response model of wind farm. To reduce the computational pressure of the central controller, a method of analytical target cascading is applied to form a decentralized frequency response strategy, which divides the centralized optimization model into the main problem(central controller) and several sub-problems(local controllers). Finally, the IEEE RTS-79 system is built in MATLAB/Simulink, which contains 80 doubly-fed wind turbines with single unit capacity of 5 MW, and the effectiveness of the proposed strategy is verified by simulation.
Key words:  frequency regulation for wind farm  wind turbines  analytical target cascading  fatigue load  wake effect

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