正弦滞环电流控制可逆变流器

Sinusoidal Band Hysteresis Current Control of Reversible Converter

从改善可逆变流器输入电流谐波总畸变率(Total Harmonic Distortion,简称THD)角度出发,提出一种改进的正弦滞环宽度控制方法,该方法可有效减小可逆变流器的THD值。采用IGBT作为功率元件,DSP作为控制器核心,霍尔元件作为电流传感器,构造出一套10kW三相电压型可逆变流器系统。在不改变变流器硬件参数和控制参数的前提下,在该试验装置上对改进的正弦滞环宽度控制方法和固定滞环宽度控制方法的控制效果进行了比较。谐波分析结果表明,前者具有更小的THD值。试验结果证明,改进的正弦滞环宽度控制方法优于固定滞环宽度控制方法。

An improved sinusoidal band hysteresis current control method to reduce the input current Total Harmonic Distortion （THD） of reversible converter is proposed in this paper.Cbmpared with fixed band hysteresis current control method, THD is decreased in the system with sinusoidal band hysteresis current control.A converter comprises IGBT, DSP and Hall-sensor.Based on the same hardware parameters and control parameters,improved method and fixed band hysteresis current control method are tested and analyzed on the three-phase voltage-source reversible converter system with oscillograph.The result of fast Fourier transform indicates that the harmonic content of the improved method is smaller than that of fixed band hysteresis current control.