CAJ | 학술논문

建立了基于空间矢量脉宽调制(SVPWM)电流控制的三相并网逆变器数学模型,提出了以电网基波频率同步旋转坐标系下电网电压前馈和电流比例积分(PI)控制相结合的三相并网逆变器控制方案.给出了系统的软件锁相环设计,并通过提高模数转换器(ADC)采样频率减小控制延时.样机实验表明,逆变器输出电流谐波含量低,控制方案具有良好的稳态和动态性能.
건립료기우공간시량맥관조제(SVPWM)전류공제적삼상병망역변기수학모형,제출료이전망기파빈솔동보선전좌표계하전망전압전궤화전류비례적분(PI)공제상결합적삼상병망역변기공제방안.급출료계통적연건쇄상배설계,병통과제고모수전환기(ADC)채양빈솔감소공제연시.양궤실험표명,역변기수출전류해파함량저,공제방안구유량호적은태화동태성능.
This paper develops mathematics model of SVPWM-based current controller for three-phased grid-connected inverter and a novel current scheme under two phase synchronous rotating frame is presented,which is combination of grid feed forward controller and PI controller.A kind of software phase-locked and dual-timer sampling scheme which decreases the control delay is proposed.Finally,a laboratory prototype is designed to verify the discussion and analysis.The experimental results show that the proposed scheme has very good dynamic and static properties,meanwhile, highly accurate steady output and less harmonic disturbance is gained.