New scheme for seamless operation for stand-alone power systems

Hyun Jun Kim, Yoon Seok Lee, Byung Moon Han, Young Doo Yoon

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

On remote islands photovoltaic (PV) panels with battery energy storage systems (BESSs) supply electric power to customers in parallel operation with engine generators (EGs) to reduce fuel consumption and environmental burden. A BESS operates in voltage control mode when it supplies power to loads alone, while it operates in current control mode when it supplies power to loads in parallel with the EG. This paper proposes a smooth mode change of the BESS from current control to voltage control by using initial value at the output of integral part in the voltage controller, and a smooth mode change from voltage control to current control by tracking the EG output voltage to the BESS output voltage using a phase-locked loop (PLL). The feasibility of the proposed scheme was verified through computer simulations and experiments with a scaled prototype.

Original languageEnglish
Article number457
JournalEnergies
Volume9
Issue number6
DOIs
StatePublished - 2016 Jun 15

Keywords

  • Battery energy storage system (BESS)
  • Current control
  • Engine generator (EG)
  • Phase-locked loop (PLL)
  • Photo voltaic (PV) panels
  • Seamless operation
  • Voltage control

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