A Review Study of Condition Monitoring and Maintenance Approaches for Diagnosis Corrosive Sulphur Deposition in Oil-Filled Electrical Transformers

2019 ◽  
pp. 133-144 ◽  
Author(s):  
Ramsey Jadim ◽  
Anders Ingwald ◽  
Basim Al-Najjar
Keyword(s):  
Condition Monitoring ◽  
Sulphur Deposition ◽  
Review Study ◽  
Electrical Transformers

scholarly journals A Novel Condition Monitoring Procedure for Early Detection of Copper Corrosion Problems in Oil-Filled Electrical Transformers

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4266
Author(s):  
Ramsey Jadim ◽  
Mirka Kans ◽  
Mohammed Alhattab ◽  
May Alhendi
Keyword(s):  
Early Detection ◽  
Condition Monitoring ◽  
Copper Corrosion ◽  
Corrosion Reaction ◽  
Anticorrosion Additive ◽  
Monitoring Procedure ◽  
Electrical Transformers ◽  
Early Fault Detection ◽  
Negative Impacts ◽  
Explosion Accidents

The negative impacts of catastrophic fire and explosion accidents due to copper corrosion problems of oil-filled electrical transformers are still in the spotlight due to a lack of effective methods for early fault detection. To address this gap, a condition monitoring (CM) procedure that can detect such problems in the initial stage is proposed in this paper. The suggested CM procedure is based on identified measurable variables, which are the relevant by-products of the corrosion reaction, and utilizes an Early Fault Diagnosis (EFD) model to detect and solve the copper corrosion problems. The EFD model includes a fault trend chart that can track a fault progression during the useful life of transformers. The purpose of this paper is to verify and validate the effectiveness of the suggested CM procedure by an empirical study in a power plant. The result of applying this procedure was early detection of copper corrosion problems in two transformers with suspected copper corrosion propagation from a total of 84. The corrective action was adding an optimized amount of a passivator, an anticorrosion additive, to suppress the corrosion reaction at the correct time. The main conclusion of this study is the importance of early detection of transformer faults to avoid the negative impacts on societal, company, and individual levels.

FE Analysis of hollow propeller shaft using different composite material - A Review study

2012 ◽  
Vol 2 (5) ◽  
pp. 204-205
Author(s):  
Nimesh A Patel ◽  
◽  
Pradip M Patel ◽  
Prof. A. B. Patel Prof. A. B. Patel
Keyword(s):  
Composite Material ◽  
Fe Analysis ◽  
Propeller Shaft ◽  
Review Study

A review on the prerequisites of Evidence-Based Curriculum as a driver to skills development of the leather value chain in Africa

2019 ◽  
Vol 5 (1) ◽  
pp. 1-10
Author(s):  
Mwinyikione Mwinyihija
Keyword(s):  
Higher Education ◽  
Curriculum Design ◽  
Value Chain ◽  
Theoretical Perspective ◽  
Economic Benefits ◽  
Skills Development ◽  
Evidence Based ◽  
Wealth Creation ◽  
Urban Rural ◽  
Review Study

The review study closely introspects’ on the prerequisites of evidence-based curriculum within the realms of specialized skills development agenda as pursued through higher education Institutions in Africa. Explicitly, the constraining factors that bedevil the leather sector are identifiable when appropriate research designs tools are applied. As such, in the process of identifying the constraints, renascence themes could, therefore, be beneficial in collecting evidence in support of developing curriculum. Such a developed curriculum stands higher chances of acceptability and aptly mitigates against challenges related to specialized skills development. The review succinctly indicates that in the process of identifying the themes, the scope of collecting evidence becomes attainable, thus, improving curricula that entails a participatory and transformative orientation. Indeed, during the review phase of the study, three main perspectives are depicted to be consequential in attaining a comprehensive, evidence-based curriculum, such as; action research, backward curriculum design perspective and theoretical perspective. Therefore, about this perspective, a reflection based on personal experiences and related to new knowledge with what they already know leads to constructivism. The relevancy of a constructivist strategy is observed to facilitate the observatory and evaluative stance during the development of evidence-based curriculum. Moreover, in consolidating and sustaining the benefit of such a developed curriculum, threshold concept was found during the review that it complements the process and strengthens the collecting evidence for curriculum development. Accordingly, therefore, the result of the review study indicate that Africa would  position itself for initiating transformational changes in aspects of specialized higher education, fruition towards socio-economic benefits (e.g. employment, wealth creation and technology transfer), reversal of urban-rural or inter/intra continental migration flurry.

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