Design of active front end LCL filter considering inductance parasitics
HUANG Yu xi1, YAO Wen xi1, LV Zheng yu1, JI Yu2
(1.School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China;
2.State Grid Nantong Power Supply Company, Nantong 226000, China)

Abstract: In order to solve the resonance problem of LCL filter, the design method of LCL filter and the parasitic phenomenon of inductance are studied. The actual model of inductor was modeled and the influencing factors were deduced. A design scheme of LCL filter with 5 kW active front end was proposed. The proposed LCL design scheme was simulated by Matlab / Simulink, and the designed model was compared with the ideal model. Finally, the experimental platform of 5kW active front end based on Dspace was built up, proving the feasibility of the scheme. The results show that this scheme can make full use of LCL filter inductor parasitic resistance to achieve better resonance suppression performance, while the loss control in the acceptable range.

Key words: LCL filter; actual model of inductance; resonant depression