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Title:Resonant-type architectures for active power decoupling in grid-tied single-phase power electronics
Author(s):Brooks, Nathan C.
Advisor(s):Pilawa-Podgurski, Robert C.N.
Department / Program:Electrical & Computer Eng
Discipline:Electrical & Computer Engr
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):single-phase, power decoupling, active energy buffer, twice-line frequency, efficiency, resonant buffer, series-stacked buffer
Abstract:In single-phase power converters, twice-line frequency power decoupling circuits are used to buffer the instantaneous energy difference between the AC and DC sides of the converter. Active buffer implementations are used to reduce the volume and potentially improve the reliability of the converter by redistributing passive energy storage requirements with combinations of switches, capacitors, and inductors. This thesis applies resonant impedance behavior to the operation of a specific DC-side twice-line frequency buffer called a series-stacked buffer (SSB). Utilizing this equivalent impedance model, an appropriate voltage-control scheme is derived and experimentally validated. There is also additional consideration of energy performance metrics in the context of DC-side buffers. Furthermore, the SSB equivalent impedance model is extended, applied, and generalized to the full single-phase converter system. This analysis includes an integrated system control method which imposes phase-locking and consistent transient stability. Experimental verification of full system interconnectivity is validated with a 1.5 kW power factor correction (PFC) boost flying capacitor multilevel (FCML) converter.
Issue Date:2018-04-27
Rights Information:Copyright 2018 Nathan C. Brooks
Date Available in IDEALS:2018-09-04
Date Deposited:2018-05

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