风机电力系统小干扰稳定域的研究

Study on small signal stable region in wind power system

针对风机接入系统影响系统稳定性的问题,建立了同步机与风机并联后的系统模型,根据发电机三阶模型和异步发电机的五阶模型得到对应增广的雅克比矩阵,应用逐方向渐进搜索的算法搜索得到系统对应的小干扰稳定域。通过算例分析了发电机励磁放大倍数对系统小干扰稳定域的影响,得出的结论证明了电力系统小干扰稳定性分析法的有效性。

Since wind power generator connected to the network influences the stability, this paper establishes the system model of the paralleled synchronous generator and wind generator, works out the relevant Jacobian matrix according to the third order model of generator and the fifth order of asynchronous generator, and finds the small signal＇ stable region through progressive search. Through the examples, the influence of generator amplification of excitation on small signal stable region is analyzed. Results prove the effectiveness of the small signal stability analysis for electric power system.