TY - JOUR
T1 - A modified LLCL-filter with the reduced conducted EMI noise
AU - Wu, Weimin
AU - Sun, Yunjie
AU - Lin, Zhe
AU - He, Yuanbin
AU - Huang, Min
AU - Blaabjerg, Frede
AU - Chung, Shu-hung Chung
PY - 2014/7
Y1 - 2014/7
N2 - For a transformerless grid-tied converter using pulse width modulation, the harmonics of grid-injected current, the leakage current, and the electromagnetic interference (EMI) noise are three important issues during designing of the output filter. In this paper, the common mode and the differential mode EMI noises are investigated for the LCL- and LLCL-filter-based single-phase full-bridge grid-tied inverters. Based on this, a modified LLCL-filter topology is proposed to provide enough attenuation on the conducted EMI noise as well as to reduce the dc-side leakage current. The parameter design method of the filter is also developed. The comparative analysis and discussion on four filter cases (the conventional LCL filter, the conventional LLCL filter, the modified LCL filter, and the modified LLCL filter) are carried out and verified through simulations and experiments on a 0.5-kW, 110 V/50 Hz single-phase full-bridge grid-tied inverter prototype.
AB - For a transformerless grid-tied converter using pulse width modulation, the harmonics of grid-injected current, the leakage current, and the electromagnetic interference (EMI) noise are three important issues during designing of the output filter. In this paper, the common mode and the differential mode EMI noises are investigated for the LCL- and LLCL-filter-based single-phase full-bridge grid-tied inverters. Based on this, a modified LLCL-filter topology is proposed to provide enough attenuation on the conducted EMI noise as well as to reduce the dc-side leakage current. The parameter design method of the filter is also developed. The comparative analysis and discussion on four filter cases (the conventional LCL filter, the conventional LLCL filter, the modified LCL filter, and the modified LLCL filter) are carried out and verified through simulations and experiments on a 0.5-kW, 110 V/50 Hz single-phase full-bridge grid-tied inverter prototype.
KW - DC-side leakage current
KW - Differentialmode (DM)
KW - EMI
KW - LCL filter
KW - LLCL filter
KW - Single-phase grid-tied inverter
U2 - 10.1109/TPEL.2013.2280672
DO - 10.1109/TPEL.2013.2280672
M3 - Journal article
SN - 0885-8993
VL - 29
SP - 3393
EP - 3402
JO - I E E E Transactions on Power Electronics
JF - I E E E Transactions on Power Electronics
IS - 7
ER -