摘要
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。
This paper develops mathematics model of SVPWM-based current controller for three-phased grid-connected in-verter 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 experi-mental results show that the proposed scheme has very good dynamic and static properties,meanwhile,highly accurate steady output and less harmonic disturbance is gained.
出处
《电力电子技术》
CSCD
北大核心
2010年第4期4-5,14,共3页
Power Electronics
关键词
逆变器
并网
空间矢量调制
锁相
inverter
grid-connected
space vector modulation
phase-locked
