LCL Filter Design for Single-Phase Grid-Connected PV Inverters with Double-frequency Unipolar PWM Switching

Sobhan Mohamadian; Mohammad Pazoki; Reza Jalilzadeh Hamidi

doi:10.1109/PESGM46819.2021.9638166

LCL Filter Design for Single-Phase Grid-Connected PV Inverters with Double-frequency Unipolar PWM Switching

Sobhan Mohamadian
, Mohammad Pazoki
, Reza Jalilzadeh Hamidi

Electrical & Computer Engineering

Research output: Contribution to book or proceeding › Conference article › peer-review

10 Scopus citations

Abstract

The current injected by PV inverters to the grid must contain low harmonic content within the standard limitations. However, the output voltage of inverters consists of large harmonic components at switching frequencies due to the PWM switching. Thus, an LCL filter is normally installed at the inverter output to efficiently reduce the current harmonics. Among different PWM switching schemes, double-frequency unipolar PWM has drawn little attention due to the issue of common-mode leakage current in transformerless inverters. However, this switching method offers advantages such as a lower harmonic content and higher efficiency. This paper paves the way for the implementation of double-frequency PWM switching scheme in transformerless single-phase grid-connected PV inverters by introducing a detailed description on LCL filter design. Theoretical and simulation studies on a complete PV converter are conducted in MATLAB/SIMULINK to prepare a straightforward LCL filter design procedure.

Original language	English
Title of host publication	2021 IEEE Power and Energy Society General Meeting, PESGM 2021
Publisher	IEEE Computer Society
ISBN (Electronic)	9781665405072
DOIs	https://doi.org/10.1109/PESGM46819.2021.9638166
State	Published - 2021
Event	2021 IEEE Power and Energy Society General Meeting, PESGM 2021 - Washington, United States Duration: Jul 26 2021 → Jul 29 2021

Publication series

Name	IEEE Power and Energy Society General Meeting
Volume	2021-July
ISSN (Print)	1944-9925
ISSN (Electronic)	1944-9933

Conference

Conference	2021 IEEE Power and Energy Society General Meeting, PESGM 2021
Country/Territory	United States
City	Washington
Period	07/26/21 → 07/29/21

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Scopus Subject Areas

Energy Engineering and Power Technology
Nuclear Energy and Engineering
Renewable Energy, Sustainability and the Environment
Electrical and Electronic Engineering

Keywords

Current harmonics
LCL filter
Single-phase H-bridge
Transformerless PV inverter
Unipolar PWM

Access to Document

10.1109/PESGM46819.2021.9638166

Cite this

@inproceedings{9f8349af3a354e37b300760314496d78,

title = "LCL Filter Design for Single-Phase Grid-Connected PV Inverters with Double-frequency Unipolar PWM Switching",

abstract = "The current injected by PV inverters to the grid must contain low harmonic content within the standard limitations. However, the output voltage of inverters consists of large harmonic components at switching frequencies due to the PWM switching. Thus, an LCL filter is normally installed at the inverter output to efficiently reduce the current harmonics. Among different PWM switching schemes, double-frequency unipolar PWM has drawn little attention due to the issue of common-mode leakage current in transformerless inverters. However, this switching method offers advantages such as a lower harmonic content and higher efficiency. This paper paves the way for the implementation of double-frequency PWM switching scheme in transformerless single-phase grid-connected PV inverters by introducing a detailed description on LCL filter design. Theoretical and simulation studies on a complete PV converter are conducted in MATLAB/SIMULINK to prepare a straightforward LCL filter design procedure.",

keywords = "Current harmonics, LCL filter, Single-phase H-bridge, Transformerless PV inverter, Unipolar PWM",

author = "Sobhan Mohamadian and Mohammad Pazoki and Hamidi, \{Reza Jalilzadeh\}",

note = "Publisher Copyright: {\textcopyright} 2021 IEEE.; 2021 IEEE Power and Energy Society General Meeting, PESGM 2021 ; Conference date: 26-07-2021 Through 29-07-2021",

year = "2021",

doi = "10.1109/PESGM46819.2021.9638166",

language = "English",

series = "IEEE Power and Energy Society General Meeting",

publisher = "IEEE Computer Society",

booktitle = "2021 IEEE Power and Energy Society General Meeting, PESGM 2021",

address = "United States",

}

Mohamadian, S, Pazoki, M & Hamidi, RJ 2021, LCL Filter Design for Single-Phase Grid-Connected PV Inverters with Double-frequency Unipolar PWM Switching. in 2021 IEEE Power and Energy Society General Meeting, PESGM 2021. IEEE Power and Energy Society General Meeting, vol. 2021-July, IEEE Computer Society, 2021 IEEE Power and Energy Society General Meeting, PESGM 2021, Washington, United States, 07/26/21. https://doi.org/10.1109/PESGM46819.2021.9638166

LCL Filter Design for Single-Phase Grid-Connected PV Inverters with Double-frequency Unipolar PWM Switching. / Mohamadian, Sobhan; Pazoki, Mohammad; Hamidi, Reza Jalilzadeh.
2021 IEEE Power and Energy Society General Meeting, PESGM 2021. IEEE Computer Society, 2021. (IEEE Power and Energy Society General Meeting; Vol. 2021-July).

Research output: Contribution to book or proceeding › Conference article › peer-review

TY - GEN

T1 - LCL Filter Design for Single-Phase Grid-Connected PV Inverters with Double-frequency Unipolar PWM Switching

AU - Mohamadian, Sobhan

AU - Pazoki, Mohammad

AU - Hamidi, Reza Jalilzadeh

PY - 2021

Y1 - 2021

N2 - The current injected by PV inverters to the grid must contain low harmonic content within the standard limitations. However, the output voltage of inverters consists of large harmonic components at switching frequencies due to the PWM switching. Thus, an LCL filter is normally installed at the inverter output to efficiently reduce the current harmonics. Among different PWM switching schemes, double-frequency unipolar PWM has drawn little attention due to the issue of common-mode leakage current in transformerless inverters. However, this switching method offers advantages such as a lower harmonic content and higher efficiency. This paper paves the way for the implementation of double-frequency PWM switching scheme in transformerless single-phase grid-connected PV inverters by introducing a detailed description on LCL filter design. Theoretical and simulation studies on a complete PV converter are conducted in MATLAB/SIMULINK to prepare a straightforward LCL filter design procedure.

AB - The current injected by PV inverters to the grid must contain low harmonic content within the standard limitations. However, the output voltage of inverters consists of large harmonic components at switching frequencies due to the PWM switching. Thus, an LCL filter is normally installed at the inverter output to efficiently reduce the current harmonics. Among different PWM switching schemes, double-frequency unipolar PWM has drawn little attention due to the issue of common-mode leakage current in transformerless inverters. However, this switching method offers advantages such as a lower harmonic content and higher efficiency. This paper paves the way for the implementation of double-frequency PWM switching scheme in transformerless single-phase grid-connected PV inverters by introducing a detailed description on LCL filter design. Theoretical and simulation studies on a complete PV converter are conducted in MATLAB/SIMULINK to prepare a straightforward LCL filter design procedure.

KW - Current harmonics

KW - LCL filter

KW - Single-phase H-bridge

KW - Transformerless PV inverter

KW - Unipolar PWM

UR - https://www.scopus.com/pages/publications/85124158596

U2 - 10.1109/PESGM46819.2021.9638166

DO - 10.1109/PESGM46819.2021.9638166

M3 - Conference article

AN - SCOPUS:85124158596

T3 - IEEE Power and Energy Society General Meeting

BT - 2021 IEEE Power and Energy Society General Meeting, PESGM 2021

PB - IEEE Computer Society

T2 - 2021 IEEE Power and Energy Society General Meeting, PESGM 2021

Y2 - 26 July 2021 through 29 July 2021

ER -

LCL Filter Design for Single-Phase Grid-Connected PV Inverters with Double-frequency Unipolar PWM Switching

Abstract

Publication series

Conference

UN SDGs

Scopus Subject Areas

Keywords

Access to Document

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