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  

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

作　　者：张雪娟 束洪春[1] 孙士云[1] 赵伟[1] 杨兴雄 黄柯昊 ZHANG Xuejuan;SHU Hongchun;SUN Shiyun;ZHAO Wei;YANG Xingxiong;HUANG Kehao(Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学,云南昆明650500

出　　处：《电力系统保护与控制》2021年第2期18-29,共12页Power System Protection and Control

基　　金：国家自然科学基金项目资助(51367009)“多视角下重合时序的策略整定、风险评估及其协调优化研究”。

摘　　要：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调频前后两种情况下系统的极限切除角进行理论计算,其中DFIG采用受控电流源等效模型。在PSD-BPA中搭建含DFIG的扩展双机系统的仿真模型,来验证理论分析的正确性。结果表明,DFIG参与系统调频有利于系统的暂态功角稳定性。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.

关 键 词：双馈风力发电机 受控电流源 极限切除角 调频 暂态功角稳定性 

分 类 号：TM315[电气工程—电机]