DFIG虚拟惯量控制对轴系振荡的影响  

IMPACT OF DFIG VIRTUAL INERTIA CONTROL ON SHAFT OSCILLATION

作　　者：边晓燕 刘洁 周歧斌 赵文彬 杜中浩 李东东 Bian Xiaoyan;Liu Jie;Zhou Qibin;Zhao Wenbin;Du Zhonghao;Li Dongdong(School of Electric Power Engineering,Shanghai University of Electric Power,Shanghai 200090,China;School of Mechatronics Engineering and Automation,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海电力大学电气工程学院,上海200090 [2]上海大学机电工程与自动化学院,上海200444

出　　处：《太阳能学报》2020年第10期285-291,共7页Acta Energiae Solaris Sinica

基　　金：上海市教育发展基金会和上海市教育委员会“曙光计划”基金(15SG50);上海市科委科技创新项目(16020501000)。

摘　　要：针对大规模风电场并网引起轴系振荡和系统惯量降低的问题,该文首先讨论工作在最大功率跟踪(MPPT)控制模式下的双馈风力机的并网轴系振荡问题,从DFIG电磁转矩的分析角度对轴系振荡机理进行推导。其次采用虚拟惯量控制,对电网提供惯量支撑,通过分析所采用的虚拟惯量控制对系统轴系振荡的影响,发现此控制方法对DFIG风力机的弱阻尼轴系振荡有一定的改善作用。最后通过DIgSILENT/PowerFactory建模仿真验证虚拟惯量控制对轴系振荡模态的改善作用。When a large scale wind farm is connected to wind power system,the problems of shaft oscillation and weakened inertia of the power system can be brought about. This paper first studies the shaft oscillation of grid connected doubly fed induction generator(DFIG)in the maximum power point tracking(MPPT)control mode. The electromagnetic torque analysis method is applied to deduce the damping mechanism of the DFIG electromagnetic torque. The issue of the weakened inertia of the power system with large scale wind farms integration is then studied. The virtual inertia control is used to provide inertia surport for the power grid. The there tical anatysis found that the virtual inertia control can mitigate the shaft oscillation of DFIG through the theoretical analysis of the effect of virtual inertia control on the shaft oscillation mode. Finally,the suppressing effect of virtual inertia control on the shaft oscillation is verified by the case study based on the software DIgSILENT/PowerFactory.

关 键 词：风电 最大风能跟踪 轴系 模态分析 DFIG 

分 类 号：TM315[电气工程—电机]