A Modified LLCL Filter With the Reduced Conducted EMI Noise

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Weimin Wu
  • Yunjie Sun
  • Zhe Lin
  • Yuanbin He
  • Min Huang
  • Frede Blaabjerg

Detail(s)

Original languageEnglish
Article number6588986
Pages (from-to)3393-3402
Journal / PublicationIEEE Transactions on Power Electronics
Volume29
Issue number7
Online published18 Feb 2014
Publication statusPublished - Jul 2014

Abstract

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.

Research Area(s)

  • DC-side leakage current, differential mode (DM), EMI, LCL filter, LLCL filter, single-phase grid-tied inverter

Citation Format(s)

A Modified LLCL Filter With the Reduced Conducted EMI Noise. / Wu, Weimin; Sun, Yunjie; Lin, Zhe et al.

In: IEEE Transactions on Power Electronics, Vol. 29, No. 7, 6588986, 07.2014, p. 3393-3402.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review