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Development df a Cost-Benefit and Risk Based Maintenance Model for Power Transformers

dc.contributor.advisorPavas, Andrés
dc.contributor.advisorDurán-Tovar, Iván Camilo
dc.contributor.authorRosero Zúñiga, Laura Sofía
dc.date.accessioned2024-01-22T21:16:14Z
dc.date.available2024-01-22T21:16:14Z
dc.date.issued2020
dc.identifier.urihttps://repositorio.escuelaing.edu.co/handle/001/2790
dc.description.abstractThis thesis presents a different approach for maintenance evaluation in power transformers. From the evolution of the health condition of a power transformer, and the concepts of cost, risk and benefit associated with it, it can be predicted when the maintenance application is ideal for such transformer. For this, first load and tests historical data of 5 sample power transformers are used to obtain their evolution of health condition and failure rate in time. To evaluate the maintenance effects, maintenance schemes previously proposed in the literature are applied. Finally, the conditions for evaluating the risk model and the cost-benefit model are proposed, through the evolution of health condition and the current remuneration plan for power transformers in Colombia. From this model it will be obtained the moments in which applying maintenance in the transformer represent the greatest benefit to the operator.eng
dc.description.abstractEsta tesis presenta una aproximación diferente para la evaluación de mantenimiento en transformadores de potencia. A partir de la evolución de condición de salud de un transformador de potencia, y los conceptos de costo, riesgo y beneficio asociados a \'esta, se puede predecir cuando la aplicación de mantenimiento es ideal para dicho transformador. Para esto, primero se hace uso de información histórica de carga y de pruebas de 5 transformadores de potencia de muestra para obtener su evolución de condición de salud y tasa de falla en el tiempo. Para evaluar los efectos de mantenimiento, se aplica los esquemas de mantenimiento propuestos previamente en la bibliografía. Finalmente, se plantean las condiciones para evaluar el modelo de riesgo y el modelo de costo-beneficio, por medio de la evolución de condición de salud y el plan de remuneración vigente para los transformadores de potencia en Colombia. De este modelo se obtendrá los momentos en los cuales aplicar mantenimiento en el transformador le representan mayor beneficio al operador.spa
dc.description.tableofcontentsResumen ix List of Figures xvii List of Tables xxi List of Symbols xxiii 1. Introduction 1 1.1. About power transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2. Background and justification . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.3. Problem statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.4. Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.4.1. Main objective . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.4.2. Specific objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2. Health condition in power transformers . . . . . . . . . . . . . . . . . 6 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.1. Monitoring through health condition . . . . . . . . . . . . . . . . . . 6 2.2. Health indices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 2.2.1. Weights and limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2.3. Reliability component . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2.3.1. Failure rate and reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 2.4. Health condition simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2.4.1. Transformer T1 health simulation . . . . . . . . . . . . . . . . . . . . 17 2.4.2. Transformer T2 health simulation . . . . . . . . . . . . . . . . . . . . 19 2.4.3. Transformer T3 health simulation . . . . . . . . . . . . . . . . . . . . 21 2.4.4. Transformer T4 health simulation . . . . . . . . . . . . . . . . . . . . 22 2.4.5. Transformer T5 health simulation . . . . . . . . . . . . . . . . . . . . 24 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26 3. Maintenance applied to power transformers . . . . . . . . . . . . . . 30 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 3.1. Maintenance as strategy for managing power transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 3.2. Evaluation of maintenance schemes . . . . . . . . . . . . . . . . . . . 32 3.2.1. Maintenance schemes applied to T1 . . . . . . . . . . . . . . . . . .34 3.2.2. Maintenance schemes applied to T2 . . . . . . . . . . . . . . . . . .38 3.2.3. Maintenance schemes applied to T3 . . . . . . . . . . . . . . . . . .43 3.2.4. Maintenance schemes applied to T4 . . . . . . . . . . . . . . . . . .48 3.2.5. Maintenance schemes applied to T5 . . . . . . . . . . . . . . . . . .52 3.2.6. ENS analysis per maintenance for sample transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 4. Proposed model for managing power transformers . . . . . . . . 64 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 4.1. Costs considered by regulation . . . . . . . . . . . . . . . . . . . . . . . . 64 4.1.1. Adjustment for the new regulation . . . . . . . . . . . . . . . . . . . 67 4.2. Proposed model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 4.2.1. Risk model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 4.2.2. Cost-benefit model . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 4.3. Implementing the proposed model . . . . . . . . . . . . . . . . . . . . . . . . 74 4.3.1. Results of proposed model for T1 . . . . . . . . . . . . . . . . . . . . 74 4.3.2. Results of proposed model for T2 . . . . . . . . . . . . . . . . . . . . 77 4.3.3. Results of proposed model for T3 . . . . . . . . . . . . . . . . . . . . 79 4.3.4. Results of proposed model for T4 . . . . . . . . . . . . . . . . . . . . 81 4.3.5. Results of proposed model for T5 . . . . . . . . . . . . . . . . . . . . 83 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 5. Conclusions and suggestions 89 5.1. Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 5.2. Suggestions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 A. Appendix A: 92 A.1. Historical tests data of sample transformers owned by ENEL-Codensa. . . . 92 A.2. Historical load data of sample transformers owned by ENEL-Codensa. . . . . 99 A.2.1. Projection load from historical data of sample transformers owned by ENEL-Codensa. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 A.2.2. Accelerated aging factor simulation . . . . . . . . . . . . . . . . . . . 110 B. Appendix B: 119 B.1. CREG remuneration plan analysis . . . . . . . . . . . . . . . . . . . . . . . . 119 C. Appendix C: Papers published under the thesis framework 125 C.1. Forecasting of power transformer life loss under Maintenance and Demand Side Management Scenarios . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 C.2. Analysis of Maintenance in Transformers Based on a Fuzzy Logic Method . . 125 C.3. A Framework For Asset Management in Electrical Systems, Part I: Conceptual Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 C.4. A Framework For Asset Management in Electrical Systems, Part II: Case Study - Power Transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . 126spa
dc.format.extent150 páginasspa
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dc.language.isospaspa
dc.publisherUniversidad Nacional de Colombiaspa
dc.rights.urihttps://creativecommons.org/licenses/by-nc/4.0/spa
dc.sourcehttps://repositorio.unal.edu.co/handle/unal/79058spa
dc.titleDevelopment df a Cost-Benefit and Risk Based Maintenance Model for Power Transformerseng
dc.typeTrabajo de grado - Maestríaspa
dc.type.versioninfo:eu-repo/semantics/publishedVersionspa
oaire.accessrightshttp://purl.org/coar/access_right/c_abf2spa
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85spa
dc.contributor.corporatenameUniversidad Nacional de Colombiaspa
dc.contributor.researchgroupGrupo de Investigación en Modelación Estratégica en Energía y Potencia - MEEPspa
dc.description.degreelevelMaestríaspa
dc.description.degreenameMagíster en Ingeniería Eléctricaspa
dc.identifier.instnameUniversidad Nacional de Colombiaspa
dc.identifier.reponameRepositorio Institucional Biblioteca Digital UNspa
dc.identifier.repourlhttps://repositorio.unal.edu.cospa
dc.identifier.urlhttps://repositorio.unal.edu.co/handle/unal/79058
dc.publisher.facultyIngenieríaspa
dc.publisher.placeBogotáspa
dc.publisher.programMaestría en Ingeniería Eléctricaspa
dc.relation.indexedN/Aspa
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dc.rights.accessrightsinfo:eu-repo/semantics/openAccessspa
dc.rights.creativecommonsAtribución-NoComercial 4.0 Internacional (CC BY-NC 4.0)spa
dc.subject.proposalPower transformereng
dc.subject.proposalTransformador de potenciaspa
dc.subject.proposalCondición de saludspa
dc.subject.proposalHealth conditioreng
dc.subject.proposalRisk evaluationeng
dc.subject.proposalEvaluación de riesgospa
dc.subject.proposalProbability of failureeng
dc.subject.proposalProbabilidad de fallaspa
dc.subject.proposalEvaluación de mantenimientospa
dc.subject.proposalMaintenance evaluationeng
dc.type.coarhttp://purl.org/coar/resource_type/c_bdccspa
dc.type.contentTextspa
dc.type.driverinfo:eu-repo/semantics/masterThesisspa
dc.type.redcolhttps://purl.org/redcol/resource_type/TMspa


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