A Simple Differential Mode EMI Suppressor for the LLCL-Filter-Based Single-Phase Grid-Tied Transformerless Inverter

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

23 Scopus Citations
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Author(s)

  • Junhao Ji
  • Weimin Wu
  • Yuanbin He
  • Zhe Lin
  • Frede Blaabjerg

Detail(s)

Original languageEnglish
Article number6998031
Pages (from-to)4141-4147
Journal / PublicationIEEE Transactions on Industrial Electronics
Volume62
Issue number7
Online published24 Dec 2014
Publication statusPublished - Jul 2015

Abstract

The single-phase power converter topologies evolving of photovoltaic applications are still including passive filters, like the LCL- or LLCL-filter. Compared with the LCL-filter, the total inductance of the LLCL-filter can be reduced a lot. However, due to the resonant inductor in series with the bypass capacitor, the differential mode (DM) electromagnetic interference (EMI) noise attenuation of an LLCL-filter-based grid-tied inverter declines. Conventionally, a capacitor was inserted in parallel with the LC resonant circuit branch of the LLCL-filter to suppress the DM EMI noise. In order to achieve a small value of capacitor as well as to minimize the additional reactive power, a novel simple DM EMI suppressor for the LLCL-filter-based system is proposed. The characters of two kinds of DM EMI suppressor are analyzed and compared in detail. Simulations and experiments on a 0.5-kW 110-V/50-Hz single-phase grid-tied inverter prototype are accomplished to confirm the analysis.

Research Area(s)

  • Differential mode (DM), electromagnetic interference (EMI) noise, grid-tied, inverter, LCL-filter, LLCL-filter, suppressor

Citation Format(s)

A Simple Differential Mode EMI Suppressor for the LLCL-Filter-Based Single-Phase Grid-Tied Transformerless Inverter. / Ji, Junhao; Wu, Weimin; He, Yuanbin; Lin, Zhe; Blaabjerg, Frede; Chung, Henry Shu-Hung.

In: IEEE Transactions on Industrial Electronics, Vol. 62, No. 7, 6998031, 07.2015, p. 4141-4147.

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