为优化风电机组极端阵风幅值设计值确定方法,研究标准IEC 61400-1中极端阵风幅值（极端运行阵风EOG、极端风切变EWS、极端相干阵风ECD、极端风向变化EDC）的编制说明和参考文献。首先介绍IEC 61400-1极端阵风幅值的计算理论,在此基础上,进一步调研提炼有较强可操作性的基于风电机组可靠性指标的极端阵风幅值精细化计算方法。该精细化算法可将风电场地形、湍流风谱模型、风速分布概率以及机组停机次数等因素纳入考量,从理论角度给出风电场合理降低阵风幅值的方法。最后,以中国北部某风电场实测数据进行了计算,结果表明：就该案例而言,提及的3种精细化计算方法所得阵风幅值相比于IEC标准结果,关键风速区间幅值最大可降低30%。
Abstract
In order to optimize the design value methodology for wind turbine extreme gust amplitudes, the compilation illustrations and references of IEC 61400-1 extreme gust amplitudes（EOG, EDC, ECD and EWS）were investigated. First, the theoretical basis of the IEC 61400-1 extreme gust amplitude calculation was examined. Subsequently, the refined approaches were proposed, incorporating wind turbine reliability considerations to optimize gust amplitude estimation. These advanced methodologies account for site-specific factors, including wind farm topography, turbulence spectrum, annual wind speed distribution, and shutdown frequencies, thereby enabling a more precise and theoretically justified reduction in gust amplitude predictions. To validate the proposed methods, a case study was conducted using physical data from a wind farm in northern China. As the results, compared to the conventional IEC 61400-1 approach, the gust amplitude obtained by these refined methods in this study can decrease the amplitude of the critical wind speed range by up to 30%.
关键词
风电机组 /
可靠性 /
风资源评估 /
精细化 /
极端阵风幅值
Key words
wind turbine generator system /
reliability /
wind resource assessment /
refinement /
extreme gust amplitude
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基金
国家重点研发计划“可再生能源技术”专项“大型海上风电机组测试与性能提升关键技术及应用示范”项目（2023YFB4203104）
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