Planning and Optimizing the Replacement Strategies of Power Transformers: Literature Review

Author:

Balanta Jefferson1,Rivera Sergio2,Romero Andrés1ORCID,Coria Gustavo1ORCID

Affiliation:

1. Electrical Engineering Institute (IEE), National University of San Juan (UNSJ), CONICET, Av. Libertador Gral. San Martín 1109, San Juan J5400, Argentina

2. EMC-UN-Electromagnetic Compatibility Research Group, Universidad Nacional de Colombia, Cra 45, Bogotá 111321, Colombia

Abstract

The power transformer is one of the most critical assets in power systems; therefore, planning and optimizing the economic investment for its replacement is crucial for the financial efficiency of the utility. A compilation of the main approaches reported in the literature for the replacement of oil-immersed power transformers is presented in this article. A chronological description of procedures presented in the literature for the determination of risk index, useful life evaluation, and transformer replacements is provided. Methodologies that use the theoretical basis of the degree of polymerization of the solid insulation of the units through the oxidation aging process to estimate their condition bring together the best tools currently available to achieve this objective. However, it is important and pertinent to complement these methodologies by considering the aging processes by pyrolysis and hydrolysis together and by incorporating economic analyses for appropriate replacement and management of these aged units.

Funder

Ministry of Science, Technology, and Innovation of Colombia

Publisher

MDPI AG

Subject

Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous),Building and Construction

Reference52 articles.

1. (2014). Asset Management—Overview, Principles and Terminology (Standard No. ISO 55000).

2. Medina, R.D. (2017). Desarrollo de Indicadores Para El Análisis de Riesgo En Parques de Transformadores de Potencia Dentro de Un Contexto de Gestión de Activos Eléctricos. [Ph.D. Thesis, Universidad Nacional de San Juan].

3. (2010). IEEE Standard Terminology for Power and Distribution Transformers (Standard No. IEEE Std C57.12.80-2010 (Revision of IEEE Std C57.12.80-2002)).

4. An Approach to Power Transformer Asset Management Using Health Index;Jahromi;IEEE Electr. Insul. Mag.,2009

5. Significance and Detection of Very Low Degree of Polymerization of Paper in Transformers;Duval;IEEE Electr. Insul. Mag.,2017

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