Review and Implementation of Transformer Health Index Methods in line with the Development of a Condition Assessment Tool

2018 ◽  
Author(s):  
Stefan Kittan ◽  
Stefan Kornhuber ◽  
Peter Kastel ◽  
Gunnar Nitsche ◽  
Gerd Valtin ◽  
...  
Keyword(s):  
Assessment Tool ◽  
Condition Assessment ◽  
Health Index ◽  
Index Methods

Virginia Wetland Condition Assessment Tool (WetCAT): A Model for Management

2018 ◽  
pp. 135-149
Author(s):  
Kirk J. Havens ◽  
Carl Hershner ◽  
Tamia Rudnicky ◽  
David Stanhope ◽  
Dan Schatt ◽  
...  
Keyword(s):  
Assessment Tool ◽  
Condition Assessment ◽  
Wetland Condition

Health Index for Transformer Condition Assessment

2018 ◽  
Vol 16 (12) ◽  
pp. 2843-2849 ◽  
Author(s):  
Ricardo Manuel Arias Velasquez ◽  
Jennifer Vanessa Mejia Lara
Keyword(s):  
Condition Assessment ◽  
Health Index

scholarly journals Power transformer health index estimation using evidential reasoning

2020 ◽  
Vol 33 (4) ◽  
pp. 571-581
Author(s):  
Srdjan Milosavljevic ◽  
Aleksandar Janjic
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Power Transformer ◽  
Real Data ◽  
Condition Assessment ◽  
Evidential Reasoning ◽  
Health Index ◽  
Power Distribution System ◽  
Index Value ◽  
Shafer Theory

Market-oriented power distribution system requires a well-planned budget with scheduled preventive and corrective maintenance during a replacement of units that are in an unsatisfactory condition. In recent years, the concept of the transformer health index as an integral part of resource management was adopted for the condition assessment and ranking of ETs. However, because of the lack of regular measurement and inspections, the confidence in health index value is greatly reduced. The paper proposes a novel methodology for the ET condition assessment and the lifetime increase through the establishment of priorities for control and maintenance. The solution is based on the upgraded health index, where the confidence to the measurement results is calculated using Evidential reasoning algorithm based on Dempster - Shafer theory. A novel, two - level hierarchical model of ET health index is proposed, with real weighting factors values. This way, the methodology for ET ranking includes the value of available information to describe ET current state. The proposed methodology is tested on real data of an installed ET and compared with the traditional health index calculation.

Industrial Application of Small Punch Testing for In-Service Component Condition Assessment: An Overview

2012 ◽  
Author(s):  
Bilal Dogan ◽  
Thomas Hyde
Keyword(s):  
Industrial Application ◽  
Structural Integrity ◽  
Assessment Tool ◽  
Residual Life ◽  
Condition Assessment ◽  
Life Assessment ◽  
Technical Program ◽  
Coating Materials ◽  
Service Component ◽  
Small Punch

The Sampling and Small Punch testing (SPT) is a powerful technique based on tests using miniaturized specimens machined out small sampled material of components in service. At present, it is the only existing method capable of providing experimental characterization of service exposed materials of components and materials of new built plants. Small sampling is non-invasive and SPT provides direct measured material properties. It provides a significant technology capability that facilitates assessing power plant operating equipment for structural integrity and operational condition. The new method provides utility members an attractive option to interrogate equipment for making run/inspect/repair/replace decisions. The SPT technique supported by assessment software, NDE and Metallography, used to define guidelines for components life assessment cross the power generation and petro-chemical sectors, serving both utilities, and constructors. It addresses the industrial need for personalized material and welds data required for a) lifing of plant; consumed life and residual life of components, b) convenience of repairing, replacing, life of the new welds on old components, c) cost of component deterioration, cost of normal service, d) characterizations and qualifications of blade repairs, of coating materials-methods. The first international SPT workshop was organized in June 27–28, 2011 in Nottingham, UK in order to discuss the state-of-the art SPT Creep and Fracture, and the draft CEN Cope of Practice (COP). The International SPT Experts Group serves as international forum for discussion and collaboration of industrial application of SPT methodology for in-service component life assessment. It is noted the draft CEN COP needs to be revised. Presently, European, Japanese and Indian national SPT project groups are running SPT tests and working on analysis programs. The present paper reports on a) the use of SPT in materials and component characterization, and b) drafted technical program by the international experts group to harmonize international efforts on SPT testing and analysis for efficiency and cost effectiveness. The draft program to bring the SPT methodology to standardization and develop an engineering component condition assessment tool for industrial application.

Urogenital atrophy: The ‘unknown factors’ challenging current practice

2021 ◽  
pp. 205336912199767
Author(s):  
Paula Briggs ◽  
Dharani K Hapangama
Keyword(s):  
Assessment Tool ◽  
Diagnostic Methods ◽  
Vaginal Smear ◽  
Health Index ◽  
Tissue Quality ◽  
Urogenital Atrophy ◽  
Current Assessment ◽  
Reproducible Method ◽  
Potential Methods ◽  
Method Of Assessment

Urogenital atrophy occurs as a result of the effect of estrogen deficiency on the tissue quality in the vulva, vagina, urethra and bladder. It is a common consequence of the menopause, with possibly up to 80% of women experiencing symptoms. Despite a number of different diagnostic methods, there is no validated objective method by which to confirm the diagnosis in clinical practice and research settings. Education, for women and clinicians, is called for to support diagnosis and treatment. However, before this can be of global benefit, development of an accessible and reproducible diagnostic test is required. Current assessment methods include routine history and clinical examination, with the clinician’s opinion based on their subjective observations. A vaginal smear to assess the ratio of superficial to parabasal cells and measurement of the pH of the vaginal secretions is more commonly used in research settings. A number of formulae have been postulated to facilitate the diagnosis including the Vaginal Health Index, the Vulval Health Index, the Genitourinary Syndrome of the Menopause assessment tool, the Genital Health Clinical Evaluation and vaginal biopsy and assessment of the vaginal microbiome. However, none of these potential methods of assessment has been validated. This article focuses on what we do not know about urogenital atrophy including the prevalence, the most appropriate terminology, aetiology, pathogenesis and the most objective and reproducible method of assessment.

scholarly journals Evaluation of Residents’ Comfort in High-Rise Residential Buildings in Dubai, United Arab Emirates

2021 ◽  
Vol 7 ◽  
Author(s):  
Chuloh Jung ◽  
Jihad Awad ◽  
Nahla Al Qassimi
Keyword(s):  
United Arab Emirates ◽  
Assessment Tool ◽  
Thermal Environment ◽  
Residential Buildings ◽  
Strong Relationship ◽  
Health Evaluation ◽  
Health Index ◽  
Physical And Mental Health ◽  
High Rise ◽  
Humidity Environment

The global record of 1,700 % urban footprint growth in only 38 years made Dubai one of the fastest growing cities in the world. The density of the metropolis population is approximately 762.6 individuals/ km2, and high-rise residential buildings in Dubai have reached 581,166 units (79%) in 2020 and become a common residential type. The objective of this study is to provide basic data for the design of high-rise residential buildings in the future by evaluating the health of the residents of high-rise residential buildings in Dubai. As a methodology, the Todai Health Index, a structured health assessment tool, was used for high-rise residents’ survey. For the analysis, the health evaluation data from residents were used as the dependent variable, and the number of living floors as the architectural characteristic and the indoor temperature and humidity condition as the residential environments were analyzed as the independent variable. The result had shown that residence floor is irrelevant to overall health, changes in the health status compared to those in the previous year, and the occurrence of daily disease health evaluation by the Todai Health Index. It was statistically proven that the thermal environment has a significant correlation with the residence floor, but the effect of the thermal environment on health was not strong. However, the humidity environment has a very strong relationship with the health of residents. The humidity environment has a very close relationship not only with the occurrence of daily diseases of residents but also with the health evaluation analyzed by the Todai Health Index. There is a significant relationship between the humidity environment and both physical and mental health. It was analyzed that a slightly humid condition had a positive effect on health.

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