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dc.contributor.authorGupta, Vidishaen
dc.date2012-04-30 15:06:26.071
dc.date.accessioned2012-04-30T22:12:16Z
dc.date.issued2012-04-30
dc.identifier.urihttp://hdl.handle.net/1974/7167
dc.descriptionThesis (Master, Electrical & Computer Engineering) -- Queen's University, 2012-04-30 15:06:26.071en
dc.description.abstractThe grid connected PV plants comprising of the PV cells and the power electronic inverters are a widely used technology in distributed power generation systems based on renewable energy sources. Microinverters form an extensive part of the ongoing research in this field. This thesis focuses on the inverter section of the microinverter. The cost and efficiency of the grid connected inverter is a chief contributing factor in the overall system price. The MOSFETs used in the DC/AC inverter are usually hard switched causing a lot of EMI noise and losses in the inverter. This is true for both, single and three phase inverters. A low switching frequency is desirable to increase the efficiency, which in turn imposes a large compromise in designing the output filter. In this thesis, switching losses have been minimized by incorporating zero voltage switching at switch turn on and variable dead-time control at switch turn off. The soft switching technique is based on control algorithms and involves no use of any auxiliary circuit. Also, the size of the output filter is reduced without increasing the switching frequency, by employing multiple paralleled inverters. The interleaving technique that is usually used in dc/dc converters is extended for dc/ac inverters and is well employed to maintain the quality of the current fed into the utility grid. In this way, at low switching frequency, high efficiency and reduced cost and sizes are achieved. The study is validated through simulation and lab experiments. The novel control circuit was first implemented using analog circuitry. After assessing the performance of the analog version of the proposed controller, it was then digitally implemented through the Field Programmable Gate Array (FPGA) technique.en
dc.language.isoengen
dc.relation.ispartofseriesCanadian thesesen
dc.rightsThis publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.en
dc.subjectPhotovoltaic Systemsen
dc.subjectMicroinvertersen
dc.subjectRenewable Energyen
dc.subjectSoft Switchingen
dc.titleDigital Control of Phase Staggered Multiple ZVS Inverters for Grid-connected Photovoltaic Systemsen
dc.typethesisen
dc.description.restricted-thesisFor obtaining a patent from the research work presented in the thesis.en
dc.description.degreeM.A.Sc.en
dc.contributor.supervisorJain, Praveen K.en
dc.contributor.departmentElectrical and Computer Engineeringen
dc.embargo.terms1825en
dc.embargo.liftdate2017-04-29
dc.degree.grantorQueen's University at Kingstonen


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