Demonstration of Future Power Grid in Isolated Islands Large-scale Remote Island Micro Grid Demonstration Facilities

Senjyu, Tomonobu; Ogimi, Kazuki; Kinjyo, Yoshihisa; Yamauchi, Hayato

doi:10.1541/ieejjournal.131.735

Cited by 3 publications

(2 citation statements)

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“…To realize a sustainable, low‐carbon society, distributed power sources, such as photovoltaic power generation and storage battery systems, are being proactively promoted . The direct current (DC) microgrid is being studied , and the demand for DC interruption devices is growing owing to the increase in DC transmission and distribution systems. Because DC has no current zero points, unlike alternating current, it is difficult to extinguish the arc discharge generated during current interruption because of the longer arc duration .…”

Section: Introductionmentioning

confidence: 99%

Dielectric strength of electric contacts after short‐duration arc in a hybrid DC circuit breaker

Nakayama

Zen

et al. 2020

IEEJ Transactions Elec Engng

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A hybrid direct current circuit breaker consisting of electrical contacts connected in parallel with a silicon carbide metal oxide semiconductor field‐effect transistor semiconductor device is capable of operating with low energy loss and high short‐circuit tolerance. It features a short‐duration arc discharge during current commutation; however, how the arc affects the dielectric strength between the contacts is not yet clear. This study conducts a quantitative evaluation of the dielectric strength after a short‐duration arc commutation. It is shown that the dielectric strength decreases after the arc commutation, and the breakdown electric field decreases as the arc duration increases. These results suggest that the existence of metal vapor and an increase in contact erosion caused by the commutation arc lower the dielectric strength of the electric contacts, in addition to the known effects of temperature rise of the contact surface and the air between contacts. © 2020 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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Section: Introductionmentioning

confidence: 99%

Dielectric strength of electric contacts after short‐duration arc in a hybrid DC circuit breaker

Nakayama

Zen

et al. 2020

IEEJ Transactions Elec Engng

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“…Recently, dc systems have been increasingly introduced for photovoltaic plants and other renewable energy generators to promote the realization of a sustainable society and low‐carbon technologies . Other applications of dc systems include data centers and experimental micro grids; with such increase in dc power transmission and distribution, dc switches and dc circuit breakers gain importance. As distinct from alternating current, direct current has no zero points; therefore, arc discharge occurring between electrical contacts during interruption is hard to extinguish, which is known to complicate current interruption.…”

Section: Introductionmentioning

confidence: 99%

Development of copper‐tungsten clad‐contacts for 400 A‐arc‐less switching of hybrid dc switch

Yamada

Chen

Yasuda

2020

Electrical Engineering Japan

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A hybrid dc switch has been studied extensively due to the increasing demand for photovoltaic plants or dc power distribution systems. The advantages of the hybrid dc switch are low contact resistance and high‐speed interruption. We have demonstrated an arc‐less commutation of current from copper‐based tungsten contacts to a SiC‐MOSFET. The arc‐less commutation prevents the contact erosion that is one of the drawbacks of conventional dc mechanical switches. This report shows the experiment results on the threshold current of the arc‐less commutation and the contact resistance with different material contacts up to 400A in a hybrid dc switch.

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Arcless Commutation of Hybrid DC Circuit Breaker by using Electric Contact Made from Tungsten

2017

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Demonstration of Future Power Grid in Isolated Islands Large-scale Remote Island Micro Grid Demonstration Facilities

Cited by 3 publications

References 0 publications

Dielectric strength of electric contacts after short‐duration arc in a hybrid DC circuit breaker

Dielectric strength of electric contacts after short‐duration arc in a hybrid DC circuit breaker

Development of copper‐tungsten clad‐contacts for 400 A‐arc‐less switching of hybrid dc switch

Arcless Commutation of Hybrid DC Circuit Breaker by using Electric Contact Made from Tungsten

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