Adaptive Dc link voltage control scheme for single phase inverters with dynamic power decoupling

Yinglai Xia, Raja Ayyanar

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

6 Scopus citations

Abstract

Power density and efficiency are important metrics for power converters in many applications including renewable energy interface. Combined with the desire to replace the bulky, unreliable electrolytic dc link capacitors with film or ceramic capacitors due to reliability concerns, this has led to the trend of allowing increasingly higher double line frequency dc link voltage ripple. This paper discusses a scheme to improve the system overall efficiency by implementing an adaptive dc link voltage control scheme under different operating conditions for a recently introduced class of single phase inverter topologies that operate with very large dc link voltage ripple. The relationship between the minimum necessary dc link voltage for different input voltage, apparent power and power factor are analyzed and the optimal dc link voltage average value are derived analytically. The analysis and benefits of the proposed scheme are validated on a single-phase inverter hardware prototype employing SiC MOSFETs and DSP28335 for control implementation. The scheme can decrease the dc link voltage average value by 24.1% while decreasing the total loss of the inverter by around 20% compared to a design that does not use the adaptive dc link approach.

Original languageEnglish (US)
Title of host publicationECCE 2016 - IEEE Energy Conversion Congress and Exposition, Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781509007370
DOIs
StatePublished - Feb 13 2017
Event2016 IEEE Energy Conversion Congress and Exposition, ECCE 2016 - Milwaukee, United States
Duration: Sep 18 2016Sep 22 2016

Other

Other2016 IEEE Energy Conversion Congress and Exposition, ECCE 2016
Country/TerritoryUnited States
CityMilwaukee
Period9/18/169/22/16

Keywords

  • Adaptive dc link voltage control
  • high dc link ripple
  • switching loss
  • transformerless PV inverter

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Control and Optimization

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