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A power smoothing control method for a photovoltaic generation system using a water electrolyzer and its filtering characteristics
Author(s) -
Takahashi Akiko,
Goto Akihisa,
Machida Yuuki,
Funabiki Shigeyuki
Publication year - 2019
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.23191
Subject(s) - smoothing , photovoltaic system , power (physics) , control theory (sociology) , power control , maximum power point tracking , electricity generation , computer science , voltage , electronic engineering , automotive engineering , engineering , electrical engineering , control (management) , physics , quantum mechanics , inverter , artificial intelligence , computer vision
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 seconds, 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.