摘要
简要介绍了基于有功能量平衡原理的控制方法,将自适应电网电流滞环控制方法应用于三相四线制有源电力滤波器。该方法主要根据电网电压、有源电力滤波器接入点电压和电网电流的微分改变滞环电流宽度,从而实现开关频率的稳定;通过改变补偿电流的波形实现电网电流的正弦化,且在负载变化时,电网电流能实现动态稳定。该方法的特点是不需要传统的谐波电流检测,可实现数字化控制。使用Matlab仿真,其结果证明了该方法对三相四线制有源电力滤波器进行定频控制是可行的。
A novel self-adaptive hysteresis grid current control technique based on the active power balance theory for three- phase and four-wire active power filter was introduced. The algorithm changes hysteresis band according to the supply voltage, load voltage and slope of grid current wave to make the switching frequency stable. The grid current would keep dynamic stability when the load changes. The characteristic of the method is absolutely digital controlling without the traditional detection for harmonic current. Finally, the method for three-phase and four-wire active power filter current control with self-adaptive switching frequency was verified effective and feasible by simulation results of Madab.
出处
《电源学报》
2012年第2期67-71,共5页
Journal of Power Supply
关键词
有功能量平衡原理
自适应电网电流滞环
三相四线制有源电力滤波器
active power balance theory
self-adaptive hysteresis grid current
three-phase and four-wire active power filter
