Hannover 2020 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 16: Poster Session 3
P 16.20: Poster
Mittwoch, 11. März 2020, 16:30–18:30, Empore Lichthof
Simulation of pressure increase in HVDC relays during plasma arcing — •Crispin Masahudu Ewuntomah1 and Jens Oberrath2 — 1Institute of Product and Process Innovation, Leuphana University Lüneburg, Germany — 2Modeling and Simulation, Department of Electric Power Engineering, South Westphalia University of Applied Science, Soest, Germany
During short circuit situations in high voltage direct current (HVDC) relays, plasma arcs are formed. The arcs extremely vaporize the contact spots of the relays such that, significant pressure is built up in the enclosed chambers of the relays. The pressure buildups may lead to explosions. To quantify such buildups, a Panasonic AEV14012 relay is being investigated, using short circuit experimental results and a numerical model established in COMSOL. The thermal plasma parameters derived from the numerical model are used to simulate the time dependent increase of pressure within the enclosed chamber of the relay. The results show the plasma arc formation, time dependent arc evolution, and pressure increase. It is established from the results that; the excessive vaporization of the contacts increases the pressure in the enclosed chamber significantly, which is quantified by the numerical model.