Resonant-type architectures for active power decoupling in grid-tied single-phase power electronics

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.

Name thesis:degree_name

M.S.

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Electrical & Computer Engr

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2018

Author dc:creator

• Brooks, Nathan C.

Contributors dc:contributor

• Pilawa-Podgurski, Robert C.N.

• single-phase, power decoupling, active energy buffer, twice-line frequency, efficiency, resonant buffer, series-stacked buffer

Statement dc:rights

• Copyright 2018 Nathan C. Brooks

Language dc:language

en

Handle dc:identifier

http://hdl.handle.net/2142/101104

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/101104