A new LCL-filter with in-series parallel resonant circuit for single-phase grid-tied inverter

Weimin Wu; Yunjie Sun; Zhe Lin; Tianhao Tang; Frede Blaabjerg; Henry Shu-Hung Chung

doi:10.1109/TIE.2013.2293703

A new LCL-filter with in-series parallel resonant circuit for single-phase grid-tied inverter

Weimin Wu, Yunjie Sun, Zhe Lin, Tianhao Tang, Frede Blaabjerg, Henry Shu-Hung Chung

Centre for Smart Energy Conversion and Utilization Research

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

92 Citations (Scopus)

Abstract

When designing a higher order output power filter for a transformerless grid-tied converter using pulsewidth modulation (PWM), the requirements on the leakage current, the electromagnetic interference (EMI) noise, and the harmonics of the grid-injected current should be addressed. For an LCL -filter-based single-phase grid-tied full-bridge inverter system, it is possible to decrease the total inductance as well as the size and the cost, if the harmonic currents around the switching frequency can be fully suppressed. In this paper, the grid-injected current harmonics and the conducted EMI noise are investigated for the conventional LCL-filter-based system. Based on this, a modified LCL-filter topology using an extra parallel L-{r}C_r resonant circuit is proposed to reduce the total inductance value, without increasing the capacitive reactive power. The validity is verified through the experiments on a 500-W 110-V/50-Hz prototype. © 1982-2012 IEEE.

Original language	English
Article number	6678624
Pages (from-to)	4640-4644
Journal	IEEE Transactions on Industrial Electronics
Volume	61
Issue number	9
Online published	5 Dec 2013
DOIs	https://doi.org/10.1109/TIE.2013.2293703
Publication status	Published - Sept 2014

Research Keywords

Common-mode noise
Differential-mode noise
Electromagnetic interference (EMI)
Harmonic current
LCL -filter
Parallel LC resonant circuit
Stiff grid

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title = "A new LCL-filter with in-series parallel resonant circuit for single-phase grid-tied inverter",

abstract = "When designing a higher order output power filter for a transformerless grid-tied converter using pulsewidth modulation (PWM), the requirements on the leakage current, the electromagnetic interference (EMI) noise, and the harmonics of the grid-injected current should be addressed. For an LCL -filter-based single-phase grid-tied full-bridge inverter system, it is possible to decrease the total inductance as well as the size and the cost, if the harmonic currents around the switching frequency can be fully suppressed. In this paper, the grid-injected current harmonics and the conducted EMI noise are investigated for the conventional LCL-filter-based system. Based on this, a modified LCL-filter topology using an extra parallel L-{r}Cr resonant circuit is proposed to reduce the total inductance value, without increasing the capacitive reactive power. The validity is verified through the experiments on a 500-W 110-V/50-Hz prototype. {\textcopyright} 1982-2012 IEEE.",

keywords = "Common-mode noise, Differential-mode noise, Electromagnetic interference (EMI), Harmonic current, LCL -filter, Parallel LC resonant circuit, Stiff grid",

author = "Weimin Wu and Yunjie Sun and Zhe Lin and Tianhao Tang and Frede Blaabjerg and Chung, {Henry Shu-Hung}",

year = "2014",

month = sep,

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T1 - A new LCL-filter with in-series parallel resonant circuit for single-phase grid-tied inverter

AU - Wu, Weimin

AU - Sun, Yunjie

AU - Lin, Zhe

AU - Tang, Tianhao

AU - Blaabjerg, Frede

AU - Chung, Henry Shu-Hung

PY - 2014/9

Y1 - 2014/9

N2 - When designing a higher order output power filter for a transformerless grid-tied converter using pulsewidth modulation (PWM), the requirements on the leakage current, the electromagnetic interference (EMI) noise, and the harmonics of the grid-injected current should be addressed. For an LCL -filter-based single-phase grid-tied full-bridge inverter system, it is possible to decrease the total inductance as well as the size and the cost, if the harmonic currents around the switching frequency can be fully suppressed. In this paper, the grid-injected current harmonics and the conducted EMI noise are investigated for the conventional LCL-filter-based system. Based on this, a modified LCL-filter topology using an extra parallel L-{r}Cr resonant circuit is proposed to reduce the total inductance value, without increasing the capacitive reactive power. The validity is verified through the experiments on a 500-W 110-V/50-Hz prototype. © 1982-2012 IEEE.

AB - When designing a higher order output power filter for a transformerless grid-tied converter using pulsewidth modulation (PWM), the requirements on the leakage current, the electromagnetic interference (EMI) noise, and the harmonics of the grid-injected current should be addressed. For an LCL -filter-based single-phase grid-tied full-bridge inverter system, it is possible to decrease the total inductance as well as the size and the cost, if the harmonic currents around the switching frequency can be fully suppressed. In this paper, the grid-injected current harmonics and the conducted EMI noise are investigated for the conventional LCL-filter-based system. Based on this, a modified LCL-filter topology using an extra parallel L-{r}Cr resonant circuit is proposed to reduce the total inductance value, without increasing the capacitive reactive power. The validity is verified through the experiments on a 500-W 110-V/50-Hz prototype. © 1982-2012 IEEE.

KW - Common-mode noise

KW - Differential-mode noise

KW - Electromagnetic interference (EMI)

KW - Harmonic current

KW - LCL -filter

KW - Parallel LC resonant circuit

KW - Stiff grid

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DO - 10.1109/TIE.2013.2293703

M3 - RGC 21 - Publication in refereed journal

SN - 0278-0046

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EP - 4644

JO - IEEE Transactions on Industrial Electronics

JF - IEEE Transactions on Industrial Electronics

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ER -

A new LCL-filter with in-series parallel resonant circuit for single-phase grid-tied inverter

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Research Keywords

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