摘要
提出了一种由正弦脉宽调制技术(sine pulse width modulation,SPWM)衍生的新的控制方法。这种方法由直流侧电容电压调整电路的输出,获得期望的电网电流幅值,并基于SPWM逆变器输出等效调制信号的原理,以单位化的电网电流作为生成控制逆变器开关动作的PWM脉冲的调制信号,强迫电网电流跟随电网电压变化,得到期望的电网电流波形和相位。该控制方法简单直接,能够实现完全数字化控制。仿真和实验结果证明了该方法在谐波抑制和功率因数校正方面的有效性和可行性。
This paper presents a novel control method derived from the sine pulse width modulation （SPWM）. The method can obtain the desired current amplitude by regulating the output of the circuit according to DC capacitor voltage. Moreover, based on the principle that the SPWM inverter outputs equivalent modulation signal, the unitized current is regarded as the modulation signals （the signals generate PWM pulse that controls inverter＇s switch operations）, and the current is forced to vary with the voltage to obtain the desired current waveform and phase. This method is simple and direct, and can achieve full digital control. The simulated and experimental results show its effectiveness and feasibility in harmonic suppression and power factor correction.
出处
《电网技术》
EI
CSCD
北大核心
2010年第6期160-168,共9页
Power System Technology
关键词
有源电力滤波器
正弦脉宽调制
数字控制
数字信号处理
active power filter
sine pulse widthmodulation （SPWM）
digital control
digital signal processing
