Method for analyzing influence of doubly-fed wind power plant control parameters on subsynchronous oscillation

The invention discloses a method for analyzing the influence of control parameters of a doubly-fed wind power plant on subsynchronous oscillation, which can analyze the influence of proportional integral parameters of a controller on the interaction of subsynchronous oscillation by establishing a non-time-varying model of each sub-module of a doubly-fed fan system and performing linear processing. According to the method, the converter control parameters most sensitive to the subsynchronous oscillation mode can be obtained through analysis, the control parameters playing a key role in stable operation of the system can be determined, the operation stability of the system can be effectively improved by reasonably setting the key control parameters, and the method has great significance in guaranteeing the safety of a power grid. 本发明公开了一种双馈风电场控制参数对次同步振荡影响的分析方法，通过建立双馈风机系统的各个子模块的非时变模型，并进行线性化处理，利用特征值分析法可分析控制器的比例积分参数对次同步振荡交互作用的影响。通过本发明可分析得到次同步振荡模态最为敏感的变流器控制参数,通过本发明可确定对系统稳定运行起到关键作用的控制参数，通过对关键控制参数进行合理整定，可以有效提升系统运行稳定性