三相APFC控制算法研究及应用

Research and Application of Three-phase APFC Control Algorithm

针对目前三相电源变频空调中存在谐波的问题,提出一种基于空间矢量变换的有源功率因数校正(APFC)控制算法,具有控制简单可靠和输出特性良好的优点。在此先通过理论分析得出三相APFC控制的数学模型,再根据坐标变换的矢量控制理论,构造控制环路传递函数,实现单位功率因数的控制。最后仿真和试验结果表明,该算法理论正确,能实现高功率因数和小谐波含量的设计目标。

An active power factor correction (APFC ) control algorithm based on space vector transformation is proposed to solve the problem of harmonics in inverter air conditioner with three-phase power.lt has the advantages of simple and reliable control and good output characteristics.The mathematical model of three-phase APFC control is obtained through theoretical analysis, and then the transfer function of the control loop is constructed according to the vector control theory of coordinate transformation, and the control of unit power factor is realized.Finally, simulation and experimental results show that the algorithm is correct in theory and can achieve the design goals of high power factor and small harmonic content.