中文摘要：

提出建立鼠笼式风电场多机等值方案。提出以故障初始时刻的鼠笼式风机的标幺值功率作为分群指标。采用K-means算法,以准则函数收敛后得到的值最小为分类标准,实现对机组的分群。针对单个机群中可能存在多种型号鼠笼式风机的情况,采用基于容量加权的参数聚合方法,分别计算等值风电机组转子运动方程参数、阻抗参数和箱式变压器参数。最后在PSCAD/EMTDC软件平台上建立鼠笼式风电场详细模型及其等值模型,仿真结果表明在相同故障条件下,风电场等值模型的故障电流能很好地拟合详细模型,验证了所提等值方案的有效性。

英文摘要：

A multi-machine equivalence scheme is proposed for the electromagnetic transient numerical simulation of large-scale FSIG-based wind farm.An indicator based on the initial fault active power per-unit is put forward to classify the generator group.K-means algorithm is adopted,which takes the criterion function with the smallest value after convergence as the standard to realize the classification of generator group.If there are several types of FSIG turbine in a generator group,the parameter aggregation based on weighted capacity is applied to calculate the rotor motion equation parameters and impedance parameters of equivalent wind generator and the transformer parameters.A detailed model of FSIG-based wind farm and its equivalent model are established on PSCAD/EMTDC platform and the simulative result shows that,under the same fault conditions,the fault current of equivalent model fits that of detail model well,verifying the effectiveness of the proposed equivalence scheme.