利用DSP控制的固态无功功率补偿器的研究

Research of New Solid-State Var Compensator controlled by DSP

本文论述了一种DSP控制的新型固态无功功率补偿器,它基于离散傅立叶变换(DFT)的谐波检测方法。该系统采用自身控制的直流电压供电方式,其无功功率的补偿是靠DSP控制逆变器的输出以一个固定的开关频率跟踪一个正弦参考波形而实现的,从而使用户侧的功率因数接近为1,同时极大地抑制了高次谐波,实验结果证明了理论分析的正确性。

A new Solid-State Var Compensator controlled by DSP is analyzed in this paper, which is based on the DFT（discrete fourier transform）detection method. It uses a self-controlled DC bus. Reactive power compensation is achieved by forcing the inverter output current to follow a sinusoidal waveform at a constant switching frequency. Thus enable the power factor of the user side to approach one, it also has suppressed the higher harmonic .The experimental result has proven the theoretical analysis accuracy.