High Frequency Isolated Single-Stage Integrated Resonant AC-DC Converters for PMSG Based Wind Energy Conversion Systems

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dc.contributor.authorDu, Yimian
dc.contributor.supervisorBhat, Ashoka Krishna Sarpangal
dc.date.accessioned2014-01-06T21:21:03Z
dc.date.available2014-01-06T21:21:03Z
dc.date.copyright2013en_US
dc.date.issued2014-01-06
dc.degree.departmentDepartment of Electrical and Computer Engineeringen_US
dc.degree.levelDoctor of Philosophy Ph.D.en_US
dc.description.abstractIn this dissertation, two high-frequency (HF) transformer isolated single-stage integrated ac-dc converters are proposed for a small scale permanent magnet synchronous generator (PMSG) based wind energy conversion system (WECS). These two types of single-stage integrated ac-dc converters include expected functions of HF isolation, power factor correction (PFC), and output regulation in one single-stage. Fixed-frequency phase-shift control and soft-switching operation are employed in both proposed ac-dc converters. After reviewing the literature and discussing pros and cons of the existing topologies, it is preferred that three identical single-phase single-stage integrated converters with interleaved connection configuration are suitable for the PMSG. For the single-phase converter, two new HF isolated single-stage integrated resonant ac-dc converters with fixed-frequency phase-shift control are proposed. The first proposed circuit is HF isolated single-stage integrated secondary-side controlled ac-dc converter. The other proposed circuit is HF isolated single-stage dual-tank LCL-type series resonant ac-dc converter, which brings better solutions compared to the first converter, such as high power factor and low total harmonic distortion (THD) at the ac input side. Approximate analysis approach and Fourier series methods are used to analyze these two proposed converters. Design examples for each one are given and designed converters are simulated using PSIM simulation package. Two experimental circuits are also built to verify the analysis and simulation. The simulated and experimental results reasonably match the theoretical analysis. Then the proposed HF isolated dual-tank LCL-type series resonant ac-dc converter is used for three-phase interleaved connection in order to satisfy requirements of PMSG based WECS. A design example for this three-phase interleaved configuration is given and simulated for validation under several operating conditions.en_US
dc.description.proquestcode0544en_US
dc.description.proquestemailduyimian@uvic.caen_US
dc.description.scholarlevelGraduateen_US
dc.identifier.urihttp://hdl.handle.net/1828/5138
dc.languageEnglisheng
dc.language.isoenen_US
dc.rights.tempAvailable to the World Wide Weben_US
dc.subjectHigh frequency isolationen_US
dc.subjectSingle-stage ac-dc converteren_US
dc.subjectPower factor correctionen_US
dc.subjectWind energy conversion systemsen_US
dc.subjectResonant LCL converteren_US
dc.subjectDual-tank configurationen_US
dc.titleHigh Frequency Isolated Single-Stage Integrated Resonant AC-DC Converters for PMSG Based Wind Energy Conversion Systemsen_US
dc.typeThesisen_US

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