A power smoothing control method for a photovoltaic generation system using a water electrolyzer and its filtering characteristics

Akiko Takahashi, Akihisa Goto, Yuuki Machida, Shigeyuki Funabiki

Research output: Contribution to journalArticle

Abstract

This paper proposes a novel power smoothing control method for a photovoltaic generation (PV) system using a water electrolyzer (ELY). This method realizes that the long-period components of the PV power fluctuation are supplied to the power grid and the short-period components of the PV power fluctuation are supplied to the ELY. The power supplied to the ELY is converted to hydrogen for fuel cell vehicles. The results of the power smoothing control method are evaluated in terms of the power in the load frequency control (LFC) band and the ability of generating hydrogen. Furthermore, filtering characteristics of the proposed method are clarified. As the result, the proposed method has reduced the power in LFC band by 83.7% compared to the PV power without the power smoothing control. The filter characteristics of the proposed method have shown that fluctuating components with periods less than 1000 s, in which the step voltage regulator does not perform, can be sufficiently eliminated from the PV power fluctuation components. When applying the proposed method for a PV system rated at 800 kW, the ability of generating hydrogen was about 2.30% of the hydrogen required for one hydrogen station.

Original languageEnglish
Pages (from-to)822-828
Number of pages7
JournalIEEJ Transactions on Power and Energy
Volume138
Issue number10
DOIs
Publication statusPublished - Jan 1 2018

Keywords

  • Hydrogen storage
  • Load frequency control
  • Photovoltaic generation
  • Power smoothing control
  • Water electrolyzer

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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