Experimental research ondirect current switchgear

Kopf, Hendrik; Wilkening, Ernst-Dieter; Klosinski, Christoph; Kurrat, Michael

doi:10.1109/holm.2014.7031068

Cited by 3 publications

(2 citation statements)

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“…The FCEV is programmed such that the V2G DC HV relay opens the instant we switch the FCEV in V2G mode off or disconnect a load. This strict switch‐off sequence could be avoided by applying DC arc suppression and contact protection , , .…”

Section: Methodsmentioning

confidence: 99%

Fuel Cell Electric Vehicle‐to‐Grid: Experimental Feasibility and Operational Performance as Balancing Power Plant

et al. 2018

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The world's future energy supply will include intermittent renewable sources, such as solar and wind power. To guarantee reliability of supply, fast‐reacting, dispatchable and renewable back‐up power plants are required. One promising alternative is parked and grid‐connected hydrogen‐powered fuel cell electric vehicles (FCEVs) in “Vehicle‐to‐Grid“ systems. We modified a commercial FCEV and installed an external 9.5 kW three‐phase alternating current (AC) grid connection. Our experimental verification of this set‐up shows that FCEVs can be used for mobility as well as generating power when parked. Our experimental results demonstrate that present‐day grid‐connected FCEVs can respond to high load gradients in the range of –760 % s−1 to + 730 % s−1, due to the parallel connection of the high voltage battery and the fuel cell stack. Virtual power plants composed of multiple grid‐connected FCEVs could perform higher power gradients than existing fast‐reacting thermal power plants with typical power gradients of 1.67 % s−1. Hydrogen consumption in 9.5 kW AC grid‐connected mode was 0.55 kg h−1, resulting in a Tank‐To‐Grid‐AC efficiency of 43% on a higher heating value basis (51 % on a lower heating value basis). Direct current to alternating current efficiency was 95 %.

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Section: Methodsmentioning

confidence: 99%

Fuel Cell Electric Vehicle‐to‐Grid: Experimental Feasibility and Operational Performance as Balancing Power Plant

et al. 2018

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“…At the same time, electrical load in the fields of electric vehicles and aerospace have been becoming larger, also leading to development of electromagnetic DC relays capable of switching higher voltages and larger currents [4][5][6]. As reported, higher voltages and larger currents will make it more difficult to extinguish arcs, resulting in more serious contact erosion [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Arcing Effects to Contact Materials in 270V dc

Zhu

et al. 2017

PPT

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Abstract. As supply DC voltage levels in automobiles, aviation and aerospace are becoming higher, high voltage and large capacity compact DC electromagnetic relays or contactors are becoming more important. In this paper, experiments were conducted at DC 270V/100A in air and nitrogen, respectively, with CuCr40, CuCr45, CuCr50, CuW60, CuW70 and CuW90 as contact materials. Welding resistance (corresponding to electrical contact life), contact erosion and breaking arc durations were measured, and the obtained results were discussed.

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Technology Innovation and Evolution in Circuit Protection

Zhou

2023

2023 IEEE 68th Holm Conference on Electrical Contacts (HOLM)

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Experimental research ondirect current switchgear

Cited by 3 publications

References 0 publications

Fuel Cell Electric Vehicle‐to‐Grid: Experimental Feasibility and Operational Performance as Balancing Power Plant

Fuel Cell Electric Vehicle‐to‐Grid: Experimental Feasibility and Operational Performance as Balancing Power Plant

Experimental Study on Arcing Effects to Contact Materials in 270V dc

Technology Innovation and Evolution in Circuit Protection

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