Multi-Objective Optimization of Series-Stacked Energy Decoupling Buffers in Single-Phase Converters

Zitao Liao, Danny J. Lohan, Nathan C. Brooks, James T. Allison, Robert Carl Nikolai Pilawa Podgurski

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The series-stacked buffer (SSB) is an active twice-line frequency energy decoupling buffer architecture in single-phase converters. It allows a large voltage ripple on the main energy buffering capacitor to improve the energy utilization ratio, and hence the overall power density. A bi-directional converter connected in series generates an equal but opposite ripple to regulate the dc-bus to a constant dc voltage with low overall ripple. This architecture has been demonstrated to achieve much higher power density than the electrolytic capacitor bank with equivalent dc-bus voltage ripple. In this work, we propose a methodology that quantifies and formalizes the SSB design process into a multi-objective optimization problem, from which the optimal design choices on the Pareto front under multiple operation constraints can be solved. Design constraints, modeling of objective functions, and optimization algorithms are discussed. With realistic hardware parameters and constraints, this methodology is applied to the SSB design for a 1.5-kW, 400-V dc-bus system. The corresponding Pareto front results are presented. Three high power density SSB hardware prototype are designed based on the Pareto front optimization results and experimentally verified.

Original languageEnglish (US)
Title of host publication2018 IEEE 19th Workshop on Control and Modeling for Power Electronics, COMPEL 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781538655412
DOIs
StatePublished - Sep 10 2018
Event19th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2018 - Padova, Italy
Duration: Jun 25 2018Jun 28 2018

Publication series

Name2018 IEEE 19th Workshop on Control and Modeling for Power Electronics, COMPEL 2018

Other

Other19th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2018
CountryItaly
CityPadova
Period6/25/186/28/18

ASJC Scopus subject areas

  • Modeling and Simulation
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Control and Optimization

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    Liao, Z., Lohan, D. J., Brooks, N. C., Allison, J. T., & Pilawa Podgurski, R. C. N. (2018). Multi-Objective Optimization of Series-Stacked Energy Decoupling Buffers in Single-Phase Converters. In 2018 IEEE 19th Workshop on Control and Modeling for Power Electronics, COMPEL 2018 [8459929] (2018 IEEE 19th Workshop on Control and Modeling for Power Electronics, COMPEL 2018). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/COMPEL.2018.8459929