摘要
针对在dq坐标系下电流型PWM逆变器数学模型的非线性、耦合性的特点,设计了双闭环解耦附加PI的控制策略。首先分析了系统的构成及原理,接下来对PWM逆变器的数学模型和双闭环解耦附加PI控制策略进行详细介绍。最后在MATIAB/Simulink软件中对系统转速、电压电流、有功功率、无功功率及功率因数进行了仿真。仿真结果证明:该控制策略不仅能够实现平滑无极调速,而且能够达到提高功率因数、消除谐波及节能的目的。
According to the characteristics of nonlinear and coupling of the mathematical model of current PWM inverter in dqsynchronous rotating coordinate,the double-ring decoupling additional PI control strategy was designed.Firstly,the composition and principle of the system was analyzed,and then the mathematical model of PWM inverter and the double-ring decoupling additional PI control strategy were detailedly introduced.Finally system speed,voltage and current,active power,reactive power and power factor were simulated in the MATIAB/Simulink software.The results proved that the control strategy not only could achieve smooth and stepless speed regulation,but also could achieve the purpose of improving power factor,eliminating harmonic and saving energy.
出处
《国外电子测量技术》
2017年第1期31-34,共4页
Foreign Electronic Measurement Technology
基金
西安航空职业技术学院院级综合科研项目(16XHKY-009)资助
