双馈风电机组接入对电力系统功角稳定性的影响  

Impact on Angle Stability of Power System With Doubly Fed Induction Generators Connected to Grid

作　　者：于强[1] 孙华东[1] 汤涌[1] 赵兵[1] 顾卓远[1] 

机构地区：[1]中国电力科学研究院,北京市海淀区100192

出　　处：《电网技术》2013年第12期3399-3405,共7页Power System Technology

摘　　要：双馈型风力发电机(doubly fed induction generator,DFIG)在新并网风电机组中占较大比例,由于具有不同于同步机组的运行特性,双馈风电机的接入给电力系统的动态行为带来一定影响。随着风电装机容量的不断增大,电力系统的稳定性将会发生改变。定义了双馈风电机组的功角特性,推导了双馈机组的等效外特性,在此基础上研究了双馈风电机组接入后单端系统的功率特性,并理论分析了双馈机组接入后单端系统的功角稳定性。研究结果表明双馈风电机组接入后单端送电系统功角的第一摆角度减小,阻尼比降低。仿真结果验证了所提理论分析的正确性。Doubly fed induction generator （DFIG） has occupied a large percent of the wind generators integrated in the system. Because of the different operating characteristics from synchronous generator, the integration of DFIG has an effect on the dynamic behaviors of power system. With the penetration level of the DFIG-based wind generation increased, the power system stability will change gradually. The paper defined the DFIG power angle characteristic and derived the DFIG equivalent extemal characteristics. On this basis, the power characteristics of single side power system with DFIG connected is investigated and then a theoretical analysis of the system transient angle stability is demonstrated. The study suggests that the first swing angle and the damping ratio are both reduced after the DFIG integrated into the system. Lastly, the simulation results verify the correctness of the study in this paper.

关 键 词：双馈感应发电机 动态行为 外特性 功率特性 功角稳定 

分 类 号：TM721[电气工程—电力系统及自动化]