摘要
采用双PWM变频器作为双馈感应发电机(DFIG)变速恒频风力发电系统的励磁电源,分析了发电机的数学模型及系统的控制策略。网侧变换器采用电网电压定向控制策略,以保持直流电压稳定和网侧单位功率因数运行,实现能量的双向流动。转子侧变换器采用定子磁链定向控制策略,以实现最大风能捕获和定子无功功率的调节。在Matlab/Simulink环境下,构建了整个风力发电系统的仿真模型,通过仿真验证了控制策略的有效性。
Adopting back-to-back PWM converter as AC-supply of variable speed constant frequency wind power system based on doubly fed induction generator,the mathematic model of generator and the control strategies of system were analyzed.Grid-side adopted the control strategy of grid voltage orientation to achieve the stability of DC-link voltage,to maintain the better power factor of grid-side and bi-direction flowing ability of energy.Rotor-side adopted the control strategy of stator flux orientation to achieve maximum wind energy capturing and adjustment of reactive power of stator.An integrated simulation model for the wind power system was build in Matlab/Simulink,the simulation results verified the validity of control strategy.
出处
《电机技术》
2011年第3期5-9,共5页
Electrical Machinery Technology
关键词
双PWM变频器
双馈感应发电机
变速恒频
Back-to-Back PWM converter Doubly-fed induction generator（DFIG） Variable speed constant frequency
