风电场集电电压序列经济性优选研究

Studies on Economic Optimization of Voltage Class Series of Collector System for Wind Farms

鉴于风电的集电电压等级序列对其建设及运行成本影响较大,研究了风电场集电电压等级序列的经济性优选问题。提出了风电场集电电压等级序列经济性优选的整体流程,建立了风电场集电电压等级序列经济性优选的评估模型。该模型以风电场年建设及运行费用之和最小为目标函数,考虑了风电场变电站容量及高中压输电线路输送容量限制等约束条件,并给出实施经济性评估的边界条件。最后对一个600 MW风电场进行了算例分析,验证了所提方法的有效性,并进一步对风电场总容量以及风电场发电能量密度对风电场集电电压等级序列优选结果的影响进行了分析。

Since the significant impact of wind farm＇s collector voltage sequence on the construction and operation costs of wind farms, the economic optimization of collector voltage class series of wind farm is researched. The whole process of the economic optimization of collector voltage class sequence of wind farm is proposed, and an evaluation model for the economic optimization of collector voltage class sequence of wind farm is established. In this model the sum of annual construction and operation costs of wind farm is taken as the objective function, and the constraints such as the capacity of wind farm substations and the transmission capacity limits of high- and medium-voltage transmission lines are considered, and the boundary conditions to perform the economic evaluation are given. Finally, the case analysis on a wind farm with capacity of 600 MW is carried out to verify the validity of the proposed method, and further the impacts of total capacity of wind farm and wind power energy density on the optimization result of collector voltage class series are analyzed.