风电场的初期选址及装机容量的最优分配

Initial Stage of Wind Power Integration Site and the Optimal Allocation of Power Capacity

针对风电场建设地点对电力系统稳定性的影响问题,本文采用模态分析法,排序风电场接入系统的影响因子,建立风电场模型,得出风电场最佳接入点,同时以电压总偏移量最小为目标函数,建立优化计算的数学模型,利用进化策略算法计算各风电场装机容量的最优分配,并以IEEE14节点系统为算例进行仿真分析。仿真结果表明,节点的影响因子越小,这个节点电压越稳定,风电的接入能力越大,说明利用模态分析择优得到的风电接入点,电压稳定性更好。因此,根据影响因子大小,即利用模态分析法可有效的选择最佳的风电场接入地点,对系统电压造成的影响最小。该方法可以很有效的指导风电场的初期选址和规模估算,并且稳态运行时电网电压水平得到改善。

In this paper,for the impact of wind power on the power system by placing new wind generation,modal analysis method was developed to reduce the impact of this problem.This method is proposed to determine the optimum capacity of wind power integration into power system,which uses evolution strategies to analyze the steadystate power system,and the objective function is the total amount of voltage change.Then this problem was simulated on IEEE14.The study on IEEE14 shows that the smaller the participation factors are,the stronger the voltage stability is.So we can choose the right place of wind power and little impact for voltage stability by the magnitude of participation factors.In conclusion,this method is of effective guidance to choose the optimum place and capacity of wind power integration and improve voltage stability.