| 引用本文: | 韩帅,张峰,丁磊,应有.基于混合Copula函数的风电场可用惯量评估方法[J].电力自动化设备,2021,41(3): |
| HAN Shuai,ZHANG Feng,DING Lei,YING You.Available inertia evaluation method of wind farm based on mixed Copula function[J].Electric Power Automation Equipment,2021,41(3): |
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| 摘要: |
| 针对风电场可用惯量值与标称值可能存在较大误差的问题，提出一种考虑风机风速分布和机组运行工况的可用惯量概率化评估算法。通过对物理影响因素的分析得到风电场平均风速的时空分布特性，进而利用混合Copula函数构建大气湍流影响下的瞬时风速条件概率分布模型；基于双馈风电机组虚拟惯量控制建立风机可用惯量和惯性功率增量的估算模型，并考虑风电场各风机的实际运行状况，得到基于一定置信度下全风电场的可用惯量区间评估曲线。以实际风电场的结构及运行数据为例进行单个风电场的可用惯量评估，利用统计数据验证了置信区间评估结果的有效性。 |
| 关键词: 可用惯量 双馈风电机组 尾流效应 虚拟惯量控制 Copula函数 |
| DOI：10.16081/j.epae.202102011 |
| 分类号:TM614 |
| 基金项目:国家电网有限公司科技项目(含高比例可再生能源的电网频率协同控制技术研究)；山东省自然科学基金青年基金资助项目(ZR2018QEE005)；山东大学青年学者未来计划项目 |
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| Available inertia evaluation method of wind farm based on mixed Copula function |
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HAN Shuai1, ZHANG Feng1, DING Lei1, YING You2
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1.Key Laboratory of Power System Intelligent Dispatch and Control, Ministry of Education, Shandong University, Jinan 250061, China;2.Zhejiang Windey Co.,Ltd.,Hangzhou 310012, China
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| Abstract: |
| Aiming at the problem that there may exist large error between available inertia value and nominal value of wind farm, a probabilistic evaluation algorithm of available inertia considering wind speed distribution and the operation condition of wind turbines is proposed. The spatiotemporal distribution characteristics of average wind speed for wind farm is obtained by the analysis of physical influence factors, further the mixed Copula function is used to construct the instantaneous wind speed conditional probability distribution model under the influence of turbulence. An estimation model of available inertia and inertial power increment for wind turbine is built based on virtual inertia control of doubly-fed induction generator, considering the actual operation condition of each wind turbine in wind farm, an available inertia interval evaluation curve of the whole wind farm is obtained based on a certain confidence level. Taking the structure and operation data of an actual wind farm as an example, the available inertia evaluation of a single wind farm is carried out, and the validity of confidence interval evaluation results is verified by statistical data. |
| Key words: available inertia doubly-fed induction generator wake effect virtual inertia control Copula function |
