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- 저자 : Fawad Aslam (검색결과 2 건)
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GENERALIZED PSEUDO BE-ALGEBRAS
( Ayesha Aslam ),( Fawad Hussain ),( Hee Sik Kim ) 호남수학회 2021 호남수학학술지 Vol.43 No.2
In this paper, we define a new algebraic structure known as a generalized pseudo BE-algebra which is a generalization of a pseudo BEalgebra. We construct some examples in order to show the existence of the generalized pseudo BE-algebra. Moreover, we characterize different classes of generalized pseudo BE-algebras by some results.
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Deterioration of Porcelain Insulators Utilized in Overhead Transmission Lines: A Review
Simpy Sanyal,Fawad Aslam,김태용,전성호,이윤정,이준신,최인혁,손주암,구자빈 한국전기전자재료학회 2020 Transactions on Electrical and Electronic Material Vol.21 No.1
Reliability of a power system is generally designated as a measure of the ability of the system to provide customers with adequate and constant supply. Power system failure have adverse eff ects and become a great concern for important large scale industries in South Korea such as semiconductors, steel and chemicals which require a high quality, stable power supply. In South Korea, nearly 80% of transmission system failures are caused by either natural eventualities such as lightning strikes or failure of insulators. Ageing assets pose signifi cant challenges for utilities. Moisture with high temperature, fl uctuation in temperature, contamination and electric stress accelerates aging in suspension insulators. The primary goal for the utility is to utilize the full life of an asset, but ageing increases the probability of deterioration and failure of equipment. The average age of vital assets, is estimated to be more than 35 years. In South Korea near about 1,223,538 porcelain insulators are reported to be in functional state. Among them only 65.19% of insulators are reported to be in operative state over 35 years. Insulators demand only 5–8% of installation costs. However, it demands more than 50% of maintenance costs. Thus, deterioration of insulator enhances capital expenditure and decrease returns on the asset base. Therefore, insulators should possess excellentelectrical aging resistance to prevent deterioration of insulators. Korea Electric Power Corporation (KEPCO), largest power generation and distribution utility in South Korea utilize porcelain for almost all suspension insulators employed in transmission lines. Porcelain insulators are usually employed in transmission system as they are cost-effective and possess near about 30 to 60 years of lifespan. Lifetime evaluation of porcelain insulators in overhead transmission line is absolutely challenging, owing to aging process. This work highlights investigation of various failures of suspension type porcelain insulators, infl uencing factors responsible for degradation in lifetime and deterioration of suspension type insulators, various laboratory test methods available for evaluation of insulators employed in overhead transmission lines.
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