Zobrazeno 1 - 10
of 320
pro vyhledávání: '"Gyung-Suk"'
Publikováno v:
Energies, Vol 17, Iss 8, p 1846 (2024)
Voltage and current measurements in high-voltage substations are fundamental for stable operation. Conventional instrument transformers (ITs) face challenges in gas-insulated switchgears (GISs), such as size, weight, accuracy limitations, and behavio
Externí odkaz:
https://doaj.org/article/2fc923a7389b4b7d865f3ab66d6a3d46
Publikováno v:
Sensors, Vol 23, Iss 24, p 9844 (2023)
This paper proposes a novel phase-resolved partial discharge (PRPD) sensor embedded in a MV-class bushing for high-accuracy insulation analysis. The design, fabrication, and evaluation of a PRPD sensor embedded in a MV-class bushing aimed to achieve
Externí odkaz:
https://doaj.org/article/a3b09c5562d14c32826af285d0bc999f
Publikováno v:
Energies, Vol 15, Iss 19, p 7043 (2022)
This paper presents a comparison between the partial discharge (PD) characteristics of g3 and dry air for gas-insulated switchgears. PD signals were measured with a conventional method according to IEC 60270 and an ultra-high frequency (UHF) method.
Externí odkaz:
https://doaj.org/article/aacbecd5caa24f82b678393b5b9eed7f
Autor:
Sung-Wook Kim, Nam-Hoon Kim, Dong-Eon Kim, Tae-Han Kim, Dong-Hoon Jeong, Young-Hwan Chung, Gyung-Suk Kil
Publikováno v:
Energies, Vol 14, Iss 24, p 8516 (2021)
Gas-insulated switchgears (GISs) are important pieces of power equipment used to improve the reliability of power facilities. As the number of GISs increases, more insulation failures occur every year. The most common cause of insulation failure is p
Externí odkaz:
https://doaj.org/article/582bc78f5a5f47f8b567c016a8d709d8
Publikováno v:
Energies, Vol 13, Iss 22, p 5973 (2020)
In this paper, a series arc was simulated under resistive load and motor load, which are mainly used in small ships, and the arc signal was analyzed using discrete wavelet transform. After calculating the correlation coefficient between the single ar
Externí odkaz:
https://doaj.org/article/5607156e10734e7d8d473a23861fd158
Publikováno v:
Energies, Vol 13, Iss 20, p 5481 (2020)
An arc fault is an electrical breakdown of the insulating medium in an electrical system. When arc faults occur, they cause electrical fires with local sparks and temperatures of over 5000 °C. A series arc is generated in series with a load due to a
Externí odkaz:
https://doaj.org/article/075ab0f0700d4597b931ba93462d771f
Publikováno v:
Energies, Vol 13, Iss 15, p 4018 (2020)
Metal oxide varistors (MOVs) are widely used to protect electrical and electronic devices that are very vulnerable to surges due to the low insulation level of the equipment. MOVs deteriorate gradually due to manufacturing defects, mechanical and the
Externí odkaz:
https://doaj.org/article/df251fbbd29341378b66a5b6f854f83a
Publikováno v:
Applied Sciences, Vol 10, Iss 7, p 2526 (2020)
This paper deals with a review of the state-of-the-art performance investigations of green gas for grid (g3) gas, which is an emerging eco-friendly alternative insulation gas for sulfur hexafluoride (SF6) that will be used in gas-insulated power faci
Externí odkaz:
https://doaj.org/article/2502f613d62c4728b5c713443748b283
Publikováno v:
Energies, Vol 12, Iss 7, p 1275 (2019)
Prediction of lightning occurrence has significant relevance for reducing potential damage to electric installations, buildings, and humans. However, the existing lightning warning system (LWS) operates using the threshold method and has low predicti
Externí odkaz:
https://doaj.org/article/d526fb4e41f34a6194ae3da02f92f0be
Publikováno v:
Applied Sciences, Vol 9, Iss 4, p 651 (2019)
This paper deals with the characteristics of partial discharge (PD) in green gas for a grid (g3), which is thought to be a promising eco-friendly alternative to substitute SF6 used in electrical power facilities and to reduce the greenhouse effect. g
Externí odkaz:
https://doaj.org/article/8f43aaf643744c17921d0ed95d3eba06