【摘要】 为解决风速波动下利用风电场常用等值建模方法建立的风电场模型存在无功功率误差问题,提出了一种适用于定速机组风电场的变参数等值建模方法。分别针对机端固定电容器和分组投切电容器两种无功补偿方式,理论推导变参数电容的计算方法,并给出等值模型的结构及其仿真建模过程,从而得到风电场变参数模型。通过算例仿真,并与常用等值方法进行了比较分析。结果表明,提出的变参数等值建模方法是有效的,所建立的风电场等值模型能够较准确地反映风电场并网点的风速波动特性。更多还原

【Abstract】 In order to solve reactive power error of wind farm equivalent model under wind speed fluctuations,a variable parameter equivalent modeling method is proposed for wind farms with fixed-speed wind turbines.For fixed capacitor and grouping switching capacitor of reactive power compensation at its terminals,calculation method of variable parameter capacitor is deduced,and the structure of the equivalent model and simulation modeling process of equivalent model are provided.Thus a wind farm variable parameter model is obtained.Through simulations and comparisons with the general equivalent methods,results show that the proposed variable parameters equivalent modeling method is valid.The proposed equivalent model of wind farm can response more accurately wind speed fluctuation characteristics at point of interconnection of wind farm.更多还原