Generalized Average-Current-Mode Control of Single-Phase AC-DC Boost Converters with Power Factor Correction

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dc.contributor.authorLouganski, Konstantinen
dc.contributor.committeechairLai, Jih-Shengen
dc.contributor.committeememberLindner, Douglas K.en
dc.contributor.committeememberLiu, Yiluen
dc.contributor.committeememberTam, Kwa-Suren
dc.contributor.committeememberNelson, Douglas J.en
dc.contributor.departmentElectrical and Computer Engineeringen
dc.date.accessioned2014-03-14T20:10:58Zen
dc.date.adate2007-04-30en
dc.date.available2014-03-14T20:10:58Zen
dc.date.issued2007-02-05en
dc.date.rdate2007-04-30en
dc.date.sdate2007-04-26en
dc.description.abstractThe dissertation presents a generalized average-current-mode control technique (GACMC), which is an extension of the average-current-mode control (ACMC) for single-phase ac-dc boost converters with power factor correction (PFC). Traditional ACMC is generalized in a sense that it offers improved performance in the form of significant reduction of the current control loop bandwidth requirement for a given line frequency in unidirectional and bidirectional boost PFC converters, and additional functionality in the form of reactive power control capability in bidirectional converters. These features allow using a relatively low switching frequency and slow-switching power devices such as insulated-gate bipolar transistors (IGBTs) in boost PFC converters, including those designed for higher ac line frequencies such as in aircraft power systems (360–800 Hz). In bidirectional boost PFC converters, including multilevel topologies, the GACMC offers a capability to supply a prescribed amount of reactive power (with leading or lagging current) independently of the dc load power, which allows the converter to be used as a static reactive power compensator in the power system. A closed-loop dynamic model for the current control loop of the boost PFC converter with the ACMC has been developed. The model explains the structure of the converter input admittance, the current phase lead phenomenon, and lays the groundwork for development of the GACMC. The leading phase admittance cancellation (LPAC) principle has been proposed to completely eliminate the current phase lead phenomenon and, consequently, the zero-crossing distortion in unidirectional converters. The LPAC technique has been adapted for active compensation of the input filter capacitor current in bidirectional boost PFC converters. The dynamic model of the current control loop for bidirectional boost PFC converters was augmented to include a reactive power controller. The proposed control strategy enables the converter to process reactive power and, thus, be used as a reactive power compensator, independently of the converter operation as an ac-dc converter. Multiple realizations of the reactive power controller have been identified and examined in a systematic way, along with their merits and limitations, including susceptibility to the ac line noise. Frequency response characteristics of reactive elements emulated by means of these realizations have been described. Theoretical principles and practical solutions developed in this dissertation have been experimentally verified using unidirectional and bidirectional converter prototypes. Experimental results demonstrated validity of the theory and proposed practical implementations of the GACMC.en
dc.description.degreePh. D.en
dc.identifier.otheretd-04262007-173037en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-04262007-173037/en
dc.identifier.urihttp://hdl.handle.net/10919/27331en
dc.publisherVirginia Techen
dc.relation.haspartkl_dissertation.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectreactive power controlen
dc.subjectinput filter capacitoren
dc.subjectleading phase admittance cancellationen
dc.subjectboost converteren
dc.subjectpower factor correctionen
dc.subjectactive-front-end converteren
dc.subjectmultilevel converteren
dc.titleGeneralized Average-Current-Mode Control of Single-Phase AC-DC Boost Converters with Power Factor Correctionen
dc.typeDissertationen
thesis.degree.disciplineElectrical and Computer Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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