Danfoss Editron Oy

Solar Foods Oy

Andrey Lana

Jero Ahola

Juha-Pekka Pitkänen

Vesa Ruuskanen

Jussi Paakkunainen

Lauri Nygren

An electric power system includes direct voltage buses () and at least two bus-tie links (-) each being connected between the direct voltage buses. Each bus-tie link has at least one capacitor (-) between positive and negative poles of the bus-tie link. At least one pole of each bus-tie link is connected via overcurrent protection devices (-), such as fuses, to respective poles () of the direct voltage buses. The capacitors of the bus-tie links form a distributed capacitor storage that is capable of providing fault currents to the electric power system to operate overcurrent protection devices so that zonal selectivity is achieved. The electric power system can be for example an electric power system of a ship or another marine vessel.

Electric power distribution system with at least two bus-tie links

A power converter for a bioelectrochemical system includes first converters each including a direct current terminal for supplying electric current via electrodes of the bioelectrochemical system, and a second converter for supplying energy to the first converters from an external electric power grid. Each first converter includes an electric element for receiving energy from the second converter and a circuitry for converting voltage of the electric element into electrolysis voltage suitable for the bioelectrochemical system. The electric element can be a secondary winding of a transformer or a direct voltage energy storage. Each first converter is galvanically isolated from the other first converters at least when the first mentioned first converter supplies energy to the bioelectrochemical system. Thus, each first converter drives its own electrode pair without disturbing the other first converters.

Power converter for a bioelectrochemical system

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Lappeenranta, Finland

Andrey Lana