双馈风力发电机组并网频率调节方法仿真比较  

Simulation Comparison of Adjustment Methods for DFIG Unit Grid-connection Frequency

作　　者：孙亮[1] 菅旭生 吴长鹏[2] 

机构地区：[1]东北电力大学电气工程学院,吉林吉林132011 [2]东北电力大学研究生部,吉林吉林132011

出　　处：《广东电力》2015年第12期41-45,共5页Guangdong Electric Power

摘　　要：目前并网风力发电机组多采用双馈感应异步风电机组,为减小范围较大的风力机和发电机转速变化对系统频率的影响,其转子通过变流器与电网相连,对其实施解耦控制,然而解耦控制也使得风电机组无法参与频率调节。为此,对超级电容储能系统以及虚拟惯性控制两种平抑频率波动方法原理进行了理论分析,利用MATLAB/Simulink仿真验证了两种方法均能改善系统频率稳定性,并根据仿真结果对上述方法进行了比较。Grid-connected wind power generators mostly use doubly fed induction generators at present, in order to reduce influence on system frequencies by large-scale changes of rotate speeds of wind turbines and generators, rotors are connected with power grids by converters for decoupling control which however may be disable to make wind power generators partici- pate in frequency regulation. Therefore, this paper carries on theoretical analysis on principles of two methods for stabili- zing frequency fluctuation including super capacitor energy storage system and virtual inertial control. By using MATLAB/ SIMULINK software, it verifies that these two methods could improve stabilities of system frequencies. According to simu- lation results, it also compares these two methods.

关 键 词：双馈感应异步风电机组 解耦控制 超级电容 虚拟惯性控制 MATLAB/SIMULINK 

分 类 号：TM614[电气工程—电力系统及自动化]