Title :
Conductive EMI Analysis and Suppression in an Active Power Filte
Author :
Lei, Wanjun ; Fang, Zhuo ; Wang, Yue ; Liu, Jinjun ; Zhai, Xi ; Wu, Longhui ; Wang, Zhaoan
Author_Institution :
Xi´´an Jiaotong Univ.
Abstract :
Active power filter (APF) is one of major power quality controllers to deal with harmonics issues. It can compensate the low frequency harmonic components in power system by using PWM method. But, being a kind of switching power converter, APF will generate electromagnetic noise in high band. In this paper, the mechanism and path of two kinds of noise are analyzed and an EMI filter is designed to decrease the EMI noise. For APF, whose output current frequency may over 1250 Hz (for compensate 25th order harmonic component in 50 Hz system), EMI filter may deteriorate its compensation performance. The multi-modular approach has been applied in the paper to achieve high equivalent switching frequency and reduce the switching ripple
Keywords :
active filters; design engineering; electromagnetic interference; interference suppression; power harmonic filters; power supply quality; switching convertors; EMI filter; PWM method; active power filter; conductive EMI analysis; conductive EMI suppression; electromagnetic noise; harmonics issues; high equivalent switching frequency; multimodular approach; power quality controllers; switching power converter; switching ripple reduction; Active filters; Electromagnetic interference; Frequency; Low-frequency noise; Power harmonic filters; Power quality; Power system analysis computing; Power system harmonics; Pulse width modulation; Switching converters;
Conference_Titel :
Power Electronics Specialists Conference, 2005. PESC '05. IEEE 36th
Conference_Location :
Recife
Print_ISBN :
0-7803-9033-4
DOI :
10.1109/PESC.2005.1581644
