双馈风机参与系统调频对系统暂态功角稳定性的影响分析

以含双馈风力发电机(Double-Fed Induction Generator,DFIG)的扩展双机系统为研究对象,研究DFIG参与系统调频对系统暂态功角稳定性的影响.将含DFIG的两机系统等值为含DFIG的单机无穷大系统,计及风电比例、风机并网位置、故障位置、负荷接入位置等四种影响因素.运用等面积法则对风机参与系统...

Effect analysis of a doubly-fed induction generator participating in system frequency modulation on system transient power angle stability

This paper studies an extended dual-machine system with a Doubly-Fed Induction Generator(DFIG),and examines the influence of the frequency regulation of the DFIG on the transient power angle stability of the system.The two-machine system with a DFIG is equal to the single-machine infinity system with a DFIG,taking into account four factors such as wind power ratio,wind turbine grid connection location,fault location,and load access location.The theoretical calculation of the critical clearing angle of the system is carried out using the equal area rule in two cases of before and after the DFIG participating in system frequency modulation,where the DFIG uses an equivalent model of a controlled current source.At the same time,it builds a simulation model of an extended dual-machine system with a DFIG in PSD-BPA to verify the correctness of the theoretical analysis.The results show that a DFIG participating in system frequency modulation is beneficial to the system's transient power angle stability.