دانلود رایگان اصل مقاله انگلیسی سال انتشار:2015 تعداد صفحات انگلیسی:12 تعداد صفحات فارسی:31 Abstract In the recent years, development of industry cause to increase nonlinear and time variant loads in power systems. These loads bring about power quality phenomena such as voltage and current harmonics, current unbalance and flicker in power systems. In this paper, an optimal method for active power filter is proposed to improve power quality. The control system of APF is based on combinati ...