考虑改进疲劳载荷指数的风电场协调优化

IF 5 2区 工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC International Journal of Electrical Power & Energy Systems Pub Date : 2024-10-23 DOI:10.1016/j.ijepes.2024.110282
Lei Fu , Jia Liu , Yixiao Gao , Yixin Zhou , Fang Xu , Xi Deng
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引用次数: 0

摘要

在风力发电场(WF)中,风力涡轮机(WT)上的损伤当量载荷(DEL)分布严重不均,增加了风力发电的维护成本。以往的研究主要针对单一目标,如疲劳载荷的总偏差或标准偏差进行优化控制。针对这些问题,本文提出了一种协调优化方法,即考虑改进的疲劳载荷指数。协调优化在 WF 和 WT 两个层面上实现。对于 WF 级,利用小信号线性化为有功功率调度建立了一个状态空间模型。然后,通过改进的灵敏度分析来评估塔架和轴组件的疲劳载荷。此外,还设计了一个协调多目标函数,该函数可使 WF 的总 DEL 最小化,并平衡 WT 的单个疲劳负载分布。对于 WT 级,提出了一种自适应内部模型控制,以抑制塔架振动和主轴扭矩波动。通过对功率和负载系数的权重分析,进行了多次实验来验证所提方法的重要性。对比结果表明,协调优化法在抑制 WF 总 DEL、平衡 WF 疲劳分布、降低单个 WT 的 DEL 以及同时满足功率参考跟踪等方面具有优越性。
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Coordinative optimization for wind farms considering improved fatigue load index
In the wind farm(WF), there exists a serious uneven distribution of damage equivalent load(DEL) on the wind turbine(WT), which increases the maintenance cost of wind power generation. Previous researches focus on a single objective such as the total or the standard deviation of fatigue loads for optimal control. To address these, this paper proposes a coordinative optimization by considering an improved fatigue load index. The coordinative optimization is achieved on both WF level and WT level. For WF level, a state-space model is built for the active power dispatch by utilizing small signal linearization. Then, an improved sensitivity analysis is performed to evaluate the fatigue load on the component of the tower and shaft. Further, a coordinative multi-objective function is designed, which minimizes the total DEL of the WF, and balances the individual fatigue load distribution of the WT. For WT level, an adaptive internal model control is proposed to suppress both tower vibrations and torque fluctuation of the main shaft. Several experiments are performed to verify the significance of the proposed method with the weight analysis of power and load coefficient. The comparison results reveals the superiority of the coordinative optimization in restraining the total DEL of the WF, balancing WF fatigue distribution, decreasing the DEL of the single WT, and satisfying the power reference tracking simultaneously.
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来源期刊
International Journal of Electrical Power & Energy Systems
International Journal of Electrical Power & Energy Systems 工程技术-工程:电子与电气
CiteScore
12.10
自引率
17.30%
发文量
1022
审稿时长
51 days
期刊介绍: The journal covers theoretical developments in electrical power and energy systems and their applications. The coverage embraces: generation and network planning; reliability; long and short term operation; expert systems; neural networks; object oriented systems; system control centres; database and information systems; stock and parameter estimation; system security and adequacy; network theory, modelling and computation; small and large system dynamics; dynamic model identification; on-line control including load and switching control; protection; distribution systems; energy economics; impact of non-conventional systems; and man-machine interfaces. As well as original research papers, the journal publishes short contributions, book reviews and conference reports. All papers are peer-reviewed by at least two referees.
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