Power electronics for a LVDC-microgrid with local PV production and electrolytic converter

Morey, Philippe (Haute école d’ingénierie et de gestion du canton de Vaud (HEIG-VD) HES-SO // Haute Ecole Spécialisée de Suisse Occidentale) ; Affolter, Jean-François (Haute école d’ingénierie et de gestion du canton de Vaud (HEIG-VD) HES-SO // Haute Ecole Spécialisée de Suisse Occidentale) ; Barras, Line (School of Engineering, HES-SO Valais-Wallis, HEI, HES-SO // University of Applied Sciences Western Switzerland) ; Carrupt, Aurélien (School of Engineering, HES-SO Valais-Wallis, HEI, HES-SO // University of Applied Sciences Western Switzerland) ; Blatter, Didier (School of Engineering, HES-SO Valais-Wallis, HEI, HES-SO // University of Applied Sciences Western Switzerland) ; Rebord, René (School of Engineering, HES-SO Valais-Wallis, HEI, HES-SO // University of Applied Sciences Western Switzerland) ; Sterren, Thomas (School of Engineering, HES-SO Valais-Wallis, HEI, HES-SO // University of Applied Sciences Western Switzerland) ; Barrade, Philippe (School of Engineering, HES-SO Valais-Wallis, HEI, HES-SO // University of Applied Sciences Western Switzerland) ; Ellert, Christoph (School of Engineering, HES-SO Valais-Wallis, HEI, HES-SO // University of Applied Sciences Western Switzerland)

The 700 V DC-microgrid installed at HES-SO Valais-Wallis integrating PV-production, battery storage and consumption, has been upgraded in terms of installed PVpower, stronger load variations, and an improved regulation scheme for the energy consumption over day-night cycle. The installed PV-power was raised from 10 kWp to 15 kWp. Whereas previously all PV-modules were injecting via individual DC/DC converters, this time a serial DC/DC converter has been developed. This allows the installation of serial PV-strings of standard dimension generally used in DC/AC based PV-plants. The grid management system now comprises a battery system of about 75 kWh nominal storage capacity that has been operated for solar peak shaving. It thus allows transferring the power surplus for reducing the exchange between the semiautonomous DC microgrid and the AC mains. In addition, an electrolysis system is being tested to use and store surplus power. In terms of consumers, a 5kVA heat pump and a 22kVA electric car charging point have been added to the grid.


Keywords:
Conference Type:
full paper
Faculty:
Ingénierie et Architecture
School:
HEI-VS
HEIG-VD
Institute:
IESE - Institut d'Energie et Systèmes Electriques
Institut Systèmes industriels
Publisher:
Matsue, Japan, 20-23 May 2019
Date:
2019-05
Matsue, Japan
20-23 May 2019
Pagination:
5 p.
Published in:
Proceedings of 3rd IEEE ICDCM, 20-23 May 2019, Matsue, Japan
Appears in Collection:

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 Record created 2020-01-14, last modified 2020-04-28

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