frame PLL on shunt active power filter

 

 

YAO Chengze1, ZHANG Youbing1, XIE Luyao1, Huang Juanmin1, ZHENG Xu2

 

(1.College of Information and Engineering, Zhejiang University of Technology, Hangzhou 310023, China;

 

2.715th Research Institute of China Ship Building Industry Corporation, Hangzhou 310023, China)

 

 

Abstract: Aiming at power quality problem of power system and the influence of compensating efficiency caused by the accuracy of phaselocked loop (PLL) on APF, the efficiency of (APF) for eliminating harmonic current and compensating reactive power was analyzed according to the mechanism of harmonic current problem and reactive power problem in power system. Two software PLL (SPLL)s were compared on Matlab/Simulink simulation platform, their ability of lock and trace phase being tested under kinds of electric environment such as balanced voltage and unbalanced voltage and frequency change. Based on the results of simulation, the (DDSRFSPLL) was proposed to be applied to APF because of its robustness. An APF prototype based on TMS320F28335 DSP was designed for experiment under the situation of balanced voltage and unbalanced voltage and load change. The results indicate that the APF with this PLL technique has good compensating performance and environment adaptability.

 

Key words: power system harmonic;  active power filter (APF); decoupled double synchronous reference frameSPLL (DDSRFSPLL); TMS320F28335