摘要
文章分析了双馈变速恒频发电机的数学模型,并对其并网运行控制策略进行研究。双馈电机使用双PWM变换器为转子侧提供励磁。网侧变换器主要功能是实现单位功率因数控制和稳定直流侧电压,转子侧变换器主要功能是实现风能最大追踪和功率的解耦控制。此外在运行期间风速过大时采用桨距角控制减小原动机出力。最后在Matlab/simulink软件中搭建了风力发电系统仿真模型,通过仿真结果验证了控制策略的可行性。
The mathematical model of doubly-fed variable speed constant frequency motor is analyzed, and the control strategies of parallel operation are researched in this paper. Dual PWM converter is used for rotor side provide excitation by doubly fed motor. Main function of grid side converter is to achieve the control of unity power factor and stabilize of DC voltage, and the main function of rotor side converter is to achieve the maximum power point tracking and decoupling control of power. In addition, the pitch angle is controlled to reduce the prime mover output when the speed of wind is too large during operation. Finally, wind power system simulation model is built in Matlab/Simulink, and the feasibility of the control strategy is shown by the simulation results.
出处
《江苏电机工程》
2012年第6期39-42,共4页
Jiangsu Electrical Engineering
关键词
双馈电机
解耦控制
最大风能追踪
桨距角控制
doubly fed motor
decoupling control
maximum power point tracking
pitch control
