基于空间电压矢量的变频器能量回馈系统研究

Research on Energy Feedback System of Inverter based on Space Vector

提出了一种新型的基于空间电压矢量脉宽调制(Space Vector Pulse Width Modulation,简称SVPWM)的整流器定频控制方案,通过理论分析得出了整流器工作在整流状态和逆变状态下实现SVPWM调制的统一占空比计算公式。将PWM整流器用作变频器的前级整流电路,以TMS320LF2407A DSP为内核搭建硬件电路,完成了变频器的能量双向流动实验。实验结果表明,该系统不仅可以使能量双向流动,实现变频器能量回馈,而且能够有效地抑制注入电网的谐波,实现网侧单位功率因数控制,使网侧电流连续,且为正弦波。

A novel constant-frequency control scheme for PWM rectifier based on space voltage vector is proposed and the uniform duty ratio formulas are given under the rectifying and regenerating states according to theory analysis in this paper.The performance of the control scheme was verified by experiments with TMS320LF2407A DSP, and the PWM rectifier was applied to the fore-circuit of inverter.The experimental results show that bidirectional flowing of the energy is implemented with energy feedback,the harmonics are suppressed effectively,the sinusoidal current waves and the unit power factor are achieved.