Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Rahisham ABD-Rahman"'
Autor:
Rizwan Ahmed, Rahisham ABD-Rahman, Zahid Ullah, Rahmat Ullah, Mohd Fairouz Mohd Yousof, Kaleem Ullah
Publikováno v:
IEEE Access, Vol 12, Pp 81196-81205 (2024)
The most frequent and dangerous hazard to the electrical insulation of high voltage (HV) and high field (HF) equipment is partial discharges (PD). The development of PD activity is both a cause and an indicator of insulation degradation, which could
Externí odkaz:
https://doaj.org/article/26395b731569487ca94846bf08d5b970
Autor:
Rizwan Ahmed, Rahisham Abd-Rahman, Zahid Ullah, Rahmat Ullah, Irfan Sami, Mohd Fairouz Mohd Yousof
Publikováno v:
IEEE Access, Vol 12, Pp 47068-47079 (2024)
Gas-insulated systems are widely utilized in the electric power sector to transmit and distribute electrical energy. Sulphur-hexafluoride (SF6) has dominated gas insulation in high-voltage insulation technology since the early 60s. It is a greenhouse
Externí odkaz:
https://doaj.org/article/3b0a7b004b1f49d2a1184884ddc0be7d
Autor:
Ali Ahmed Salem, Rahisham Abd-Rahman, Mohd Taufiq Bin Ishak, Kwan Yiew Lau, Zulkurnain Abdul-Malek, Salem Al-ameri, Samir A. Al-Gailani, Sherif S.M. Ghoneim
Publikováno v:
Ain Shams Engineering Journal, Vol 14, Iss 12, Pp 102249- (2023)
The aim of this work is to model the influence of uneven contamination distribution under various humidity on the pollution flashover voltage of 11 kV porcelain insulator disc. Four scenarios of contamination distribution were proposed to test the sa
Externí odkaz:
https://doaj.org/article/b03cf45a13ee48458e95ece642ecab11
Autor:
Ali Ahmed Salem, Rahisham Abd-Rahman, Samir Ahmed Al-Gailani, Zainal Salam, Muhammad Saufi Kamarudin, Hidayat Zainuddin, Mohd Fairouz Mohd Yousof
Publikováno v:
IEEE Access, Vol 8, Pp 175827-175839 (2020)
In this article, an innovative approach to assess the risk of uniform/non-uniform pollution and wet high voltage glass insulator is proposed. The assessment is based on a new index, named as Rh', which is derived from the 3rd, 5th and 7th harmonics o
Externí odkaz:
https://doaj.org/article/e819ee9a9d9f455bb1b3ddd7df75b429
Autor:
M.H.A. Hamid, M.T. Ishak, N.S. Suhaimi, J. Adnan, N.I. Hashim, M. Ariffin, N.I.A. Katim, Rahisham Abd Rahman
Publikováno v:
Alexandria Engineering Journal, Vol 61, Iss 11, Pp 9095-9105 (2022)
This paper presents the investigation on the dielectric properties (dissipation factor, relative permittivity, and resistivity) and AC breakdown voltage behaviour of Palm Oil (PO) and Rice Bran Oil (RBO). The dielectric properties experiment was carr
Externí odkaz:
https://doaj.org/article/3e6fc7eac1ee48a481f3391c4f1e3140
Autor:
Nauman Ahmed, Huigang Wang, Rizwan Ahmad, Ali Ahmed Salem, Rahisham Abd Rahman, Muhammad Kashif, Shahzad Arshad, Kwan. Y. Lau
Publikováno v:
PLoS ONE, Vol 17, Iss 6 (2022)
SONAR signal processing plays an indispensable role when it comes to parameter estimation of Direction of Arrival (DOA) of acoustic plane waves for closely spaced target exclusively under severe noisy environments. Resolution performance of classical
Externí odkaz:
https://doaj.org/article/c59d98c683f44f1f8e5396c24e6e1473
Autor:
Ali Ahmed Salem, Kwan Yiew Lau, Zulkurnain Abdul-Malek, Wenbin Zhou, Salem Al-Ameri, Samir A. Al-Gailani, Rahisham Abd Rahman
Publikováno v:
Polymers, Vol 14, Iss 6, p 1236 (2022)
In this paper, a unique approach based on electrical characteristics observed from measurements of contaminated polymeric insulators was established to calculate the electric field distribution over their surfaces. A case study using two different 33
Externí odkaz:
https://doaj.org/article/6cb9e873271043c28fac163882d05bd1
Publikováno v:
Jurnal Teknologi. 85:33-41
Insulation oil is one of the most important components in an oil-insulated transformer. With the use of the dissolved gas analysis (DGA) tool, the condition of the transformer can be studied and predicted to prevent unwanted events from occurring. Ho
Autor:
Rizwan Ahmed, Rahisham Abd Rahman, Arshad Jamal, Ali Ahmed Salem, Bander Saman, Kwan Yiew Lau, Sherif S. M. Ghoneim
Publikováno v:
Polymers, Vol 14, Iss 3, p 516 (2022)
In-depth understanding of the pollution problems such as dry bands and the polymeric aging process requires better determination of electric field strength and its distribution over the polymeric surface. To determine the electric field distribution
Externí odkaz:
https://doaj.org/article/afd91b7c92e548389010729d867ea660
Autor:
Mardhiah Hayati Abdul Hamid, Mohd Taufiq Ishak, Nur Sabrina Suhaimi, Jaafar Adnan, Nazrul Fariq Makmor, Nurul Izzatul Akma Katim, Rahisham Abd Rahman
Publikováno v:
Energies, Vol 14, Iss 16, p 5084 (2021)
Transformer oil does not only serve as an insulating liquid, but also in removing heat from the windings and cores. Mineral oil (MO) has been widely used in transformers for more than 150 years. Recently, researchers have attempted to search for alte
Externí odkaz:
https://doaj.org/article/513cd65e306645778176cd4c6bc445c2