Full metadata
Title
Dynamic loading of substation distribution transformers: detecting unreliable thermal models and improving the accuracy of predictions
Description
t temperature (HST) and top-oil temperature (TOT) are reliable indicators of the insulation temperature. The objective of this project is to use thermal models to estimate the transformer's maximum dynamic loading capacity without violating the HST and TOT thermal limits set by the operator. In order to ensure the optimal loading, the temperature predictions of the thermal models need to be accurate. A number of transformer thermal models are available in the literature. In present practice, the IEEE Clause 7 model is used by the industry to make these predictions. However, a linear regression based thermal model has been observed to be more accurate than the IEEE model. These two models have been studied in this work.
This document presents the research conducted to discriminate between reliable and unreliable models with the help of certain metrics. This was done by first eyeballing the prediction performance and then evaluating a number of mathematical metrics. Efforts were made to recognize the cause behind an unreliable model. Also research was conducted to improve the accuracy of the performance of the existing models.
A new application, described in this document, has been developed to automate the process of building thermal models for multiple transformers. These thermal models can then be used for transformer dynamic loading.
This document presents the research conducted to discriminate between reliable and unreliable models with the help of certain metrics. This was done by first eyeballing the prediction performance and then evaluating a number of mathematical metrics. Efforts were made to recognize the cause behind an unreliable model. Also research was conducted to improve the accuracy of the performance of the existing models.
A new application, described in this document, has been developed to automate the process of building thermal models for multiple transformers. These thermal models can then be used for transformer dynamic loading.
Date Created
2014
Contributors
- Rao, Shruti Dwarkanath (Author)
- Tylavsky, Daniel J (Thesis advisor)
- Holbert, Keith E. (Committee member)
- Karady, George G. (Committee member)
- Arizona State University (Publisher)
Topical Subject
Resource Type
Extent
xiv, 98 p. : col. ill
Language
Copyright Statement
In Copyright
Primary Member of
Peer-reviewed
No
Open Access
No
Handle
https://hdl.handle.net/2286/R.I.25809
Statement of Responsibility
by Shruti Dwarkanath Rao
Description Source
Viewed on Nov., 7, 2014
Level of coding
full
Note
Partial requirement for: M.S., Arizona State University, 2014
Note type
thesis
Includes bibliographical references (p. 80-81)
Note type
bibliography
Field of study: Engineering
System Created
- 2014-10-01 04:58:55
System Modified
- 2021-08-30 01:33:33
- 2 years 7 months ago
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