scholarly journals Analysis of thermal models to determine the loss of life of mineral oil immersed transformers

2021 ◽  
Vol 10 (5) ◽  
pp. 2327-2336
Author(s):  
Mohammad Tolou Askari ◽  
Mohammad Javad Mohammadi ◽  
Jagadeesh Pasupuleti ◽  
Mehrdad Tahmasebi ◽  
Shangari K. Raveendran ◽  
...  
Keyword(s):  
Distribution Systems ◽  
Residual Life ◽  
Hot Spot ◽  
Mineral Oil ◽  
Effective Parameters ◽  
Loss Of Life ◽  
Thermal Models ◽  
Different Types ◽  
Electrical Transformers ◽  
Transmission And Distribution

Hot spot as well as top oil temperatures have played the most effective parameters on the life of the electrical transformers. The prognostication of these factors is very vital for determining the residual life of the electrical transformers in the transmission and distribution systems. Thus, an accurate mathematical method is required to calculate the critical temperature such as hot spot and top oil temperature based on the different types of thermal models. In this study calculates the service life of the transformers based on an accurate top oil temperature. Accordingly, An approach solution is given for calculating the thermal model. Also, findings are validated with true temperatures. Finally, this method is implemented on 2500 KVA electrical transformer.

Coordinative real-time sub-transmission volt–var control for reactive power regulation between transmission and distribution systems

2019 ◽  
Vol 13 (11) ◽  
pp. 2006-2014 ◽  
Author(s):  
Xinda Ke ◽  
Nader Samaan ◽  
Jesse Holzer ◽  
Renke Huang ◽  
Bharat Vyakaranam ◽  
...  
Keyword(s):  
Real Time ◽  
Distribution Systems ◽  
Reactive Power ◽  
Power Regulation ◽  
Transmission And Distribution

Loss of Life and Loss of Bodily Integrity: Two Different Sources of Threat for People who are Ill

1985 ◽  
Vol 15 (3) ◽  
pp. 207-222 ◽  
Author(s):  
Linda L. Viney
Keyword(s):  
Healthy People ◽  
Personal Construct ◽  
Personal Construct Theory ◽  
Bodily Integrity ◽  
Loss Of Life ◽  
Psychological States ◽  
Different Types ◽  
Construct Theory ◽  
Positive Feelings ◽  
Different Sources

Personal construct theory was used to generate some questions about the meanings that different types of threat–loss of life and loss of bodily integrity–hold for people who are severely ill. Content analyses of the responses of ill people and healthy people indicated that ill people expressed more concern with both types of threat than healthy people. Ill people who were suffering from acute rather than chronic illness, who were scheduled for surgery and who were hospitalized rather than being cared for at home expressed more concern about loss of life but not about loss of bodily integrity than other ill people. Each type of threatened loss was found to be associated with a different set of psychological states for people who were ill. Threat of loss of life was associated with indirectly expressed anger and uncertainty but also with the expression of many positive feelings. Threat of loss of bodily integrity was also associated with indirectly expressed anger, but with direct expression of it too, together with hopelessness and helplessness. Patients facing the first threat saw themselves as actively engaged in relationships with others, while those facing the second viewed themselves more often as passive participants. The value of this information about the meanings of threats of loss of life and loss of bodily integrity for the counseling of ill people dealing with these threats was illustrated by two case studies.

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