基于坐标变换的单相4象限整流器控制

摘要

将基于坐标变换的软件锁相环技术应用在单相电源系统中,针对两电平单相4象限整流器,在分析其工作原理的基础上建立了旋转坐标系下的数学模型,通过模型分析提出了基于坐标变换的控制方法.将变流器控制方法与软件锁相环相结合,提出了针对单相PWM整流器的控制算法,采用仿真软件搭建了系统模型并进行计算,对控制方法的可行性进行了验证.仿真结果表明,在牵引和再生制动工况下,控制方法能够保证电网的功率因数接近于1,并且具有较好的动态性能.%A soft phase locked loop (PLL) based on coordinate transformation is used in single-phase power system. The operating principle of single-phase 4 quadrant rectifier was analyzed,and its mathematical model was founded in rotating coordinate. The control method based on coordinate transformation was presented according to model analysis. Combined the control method with soft PLL,system control strategy was presented. System model was established and simulated in order to validate the feasibility of control strategy. The simulation results show that under traction and regenerative modes,the power factor of line is nearly unity,and the dynamic performance is guaranteed.