考虑双馈风电机的配网广义综合负荷建模

Load Modeling Considering Doubly-Fed Induction Generator (DFIG) Integrated into Distribution Network

提出考虑双馈风电机接入的配电网广义综合负荷模型。通过仿真结合机理分析指出可采用恒功率源对面向负荷建模的双馈式风电机暂态外特性进行等效描述,将其与传统配网综合负荷模型结合即可得广义综合负荷模型;在不同运行方式下分别对样本进行多曲线拟合参数辨识,将模型拟合效果与传统内插、外推效果进行对比,结果显示多曲线拟合可得适应性更强的模型参数,且根据辨识结果可评估分布式电源并网容量,模型结构合理、有效;为简化广义模型结构,将恒功率源并入传统ZIP模型的恒功率部分得到广义ZIP模型并对相应参数转换关系进行推导。

This paper proposes a distribution network-side generalized synthesis load model （GSLM） which takes DFIG into consideration. DFIG is considered as a constant power source from the point of view of the time frame of electric-mechanical transient simulation. Equivalent model of DFIG is combined with the traditional distribution network synthesis load model and GSLM is then derived. The GSLM is verified in different scenarios and the multi-curve fitting method is used for the sake of improving the generalization ability of it, the fitting results are better than the results of traditional generalization method, higher adaptatable parameters are acquired. The peneration capacity of DFIG can be also gotten through the identification results and fitting results show the rationality and effectiveness of the GSLM. Furthermore, equivalent model of DFIG is combined with the part of constant power source of traditional ZIP static load model for the purpose of simplifing the structure of GSLM and the transformation relation is obtained.