An Integrated Permanent-Magnet-Synchronous-Generator-Rectifier Architecture for Limited-Speed-Range Applications

Phuc Huynh, Patrick Wang, Arijit Banerjee

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

Abstract

High efficiency and high power density are critical in megawatt-class mechanical-to-electrical energy conversion systems that operate within a limited speed range, as in wind- and gas-turbine-driven generators. Generator output is connected to an ac-to-dc conversion system for processing and controlling power flow to an electric grid. Conventional high-power ac-to-dc conversion architectures rely heavily on active rectifiers, which consist of fully-controlled power-electronic switches. These make the system bulky, lossy, and less reliable. This paper presents an alternative approach: integrating a multi-port permanent-magnet synchronous generator (PMSG) with series-stacked power converters. An active rectifier processes only a fraction of the total converted power while regulating the dc bus. The remaining power is processed by diode bridges, which allows a substantial increase in overall efficiency, power density, and reliability. Theoretical analysis shows that for wind-power generation applications, the active rectifier processes a maximum of 25% of the rated power while the PMSG operates in a speed range similar to the conventional doubly-fed induction machine. The conversion loss is reduced by 66%. Results from a laboratory-scale experimental setup corroborate the proposed architecture. This approach potentially increases integration of medium-voltage dc distribution to the megawatt-class mechanical-to-electrical energy conversion systems to achieve higher efficiency, power density and lower cost.

Original languageEnglish (US)
Title of host publication2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages3413-3420
Number of pages8
ISBN (Electronic)9781479973118
DOIs
StatePublished - Dec 3 2018
Event10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018 - Portland, United States
Duration: Sep 23 2018Sep 27 2018

Publication series

Name2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018

Other

Other10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018
Country/TerritoryUnited States
CityPortland
Period9/23/189/27/18

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Control and Optimization
  • Computer Networks and Communications
  • Hardware and Architecture
  • Information Systems and Management

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