Modeling and analysis of current harmonic distortion from grid connected PV inverters under different operating conditions

Du, Y; Lu, DDC; James, G; Cornforth, DJ

Modeling and analysis of current harmonic distortion from grid connected PV inverters under different operating conditions

Du, Y Lu, DDC

James, G

Cornforth, DJ

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Publication Type:: Journal Article
Citation:: Solar Energy, 2013, 94 pp. 182 - 194
Issue Date:: 2013-08-01

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Field	Value	Language
dc.contributor.author	Du, Y	en_US
dc.contributor.author	Lu, DDC https://orcid.org/0000-0003-2145-0580	en_US
dc.contributor.author	James, G https://orcid.org/0000-0002-1347-0285	en_US
dc.contributor.author	Cornforth, DJ	en_US
dc.date.issued	2013-08-01	en_US
dc.identifier.citation	Solar Energy, 2013, 94 pp. 182 - 194	en_US
dc.identifier.issn	0038-092X	en_US
dc.identifier.uri	http://hdl.handle.net/10453/116997
dc.description.abstract	Due to the fast growth of photovoltaic (PV) installations, concerns are rising about the harmonic distortion generated from PV inverters. High current total harmonic distortion (THD) occurs when PV inverters operate under light load conditions due to low solar insolation. A general model modified from the conventional control structure diagram is introduced to analyze the harmonic formation process. Causes of the current harmonics are summarized and its relationship with output power levels is analyzed. The field measurement for current harmonics is carried out at the Commonwealth Scientific and Industrial Research Organisation (CSIRO) microgrid to validate the analysis results. In particular for two-stage inverter, unlike previous papers that assume the DC-link voltage is constant, the DC-link voltage ripple is identified as the source of a series of odd harmonics. A mew periodic time-varying model is proposed by including the DC-link voltage ripple into the conventional current control loop model. This model is able to simulate the characteristics of the harmonic components and show their dependence on the DC-link voltage ripple. © 2013 Elsevier Ltd.	en_US
dc.relation.ispartof	Solar Energy	en_US
dc.relation.isbasedon	10.1016/j.solener.2013.05.010	en_US
dc.subject.classification	Energy	en_US
dc.title	Modeling and analysis of current harmonic distortion from grid connected PV inverters under different operating conditions	en_US
dc.type	Journal Article
utslib.citation.volume	94	en_US
utslib.for	0906 Electrical and Electronic Engineering	en_US
utslib.for	12 Built Environment and Design	en_US
utslib.for	09 Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/DVC (Research)
pubs.organisational-group	/University of Technology Sydney/DVC (Research)/Institute For Sustainable Futures
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - ISF - Institute for Sustainable Futures
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	94	en_US

Abstract:

Due to the fast growth of photovoltaic (PV) installations, concerns are rising about the harmonic distortion generated from PV inverters. High current total harmonic distortion (THD) occurs when PV inverters operate under light load conditions due to low solar insolation. A general model modified from the conventional control structure diagram is introduced to analyze the harmonic formation process. Causes of the current harmonics are summarized and its relationship with output power levels is analyzed. The field measurement for current harmonics is carried out at the Commonwealth Scientific and Industrial Research Organisation (CSIRO) microgrid to validate the analysis results. In particular for two-stage inverter, unlike previous papers that assume the DC-link voltage is constant, the DC-link voltage ripple is identified as the source of a series of odd harmonics. A mew periodic time-varying model is proposed by including the DC-link voltage ripple into the conventional current control loop model. This model is able to simulate the characteristics of the harmonic components and show their dependence on the DC-link voltage ripple. © 2013 Elsevier Ltd.

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http://hdl.handle.net/10453/116997