Campelo FluSHELL - A Tool for Thermal Modelling and Simulation of Windings for Large Shell-Type Power Transformers

1. Auflage 2018
ISBN: 978-3-319-72703-5
Verlag: Springer Nature Switzerland
Format: PDF
Kopierschutz: 1 - PDF Watermark

E-Book, Englisch, 214 Seiten

Reihe: Springer Theses

This thesis addresses a novel application of network modelling methodologies to power transformers. It develops a novel thermal model and compares its performance against that of a commercial computational fluid dynamics (CFD) code, as well as in experiments conducted in a dedicated setup built exclusively for this purpose. Hence, the thesis cross-links three of the most important aspects in high-quality research: model development, simulation and experimental validation.Network modelling is used to develop a tool to simulate the thermal performance of power transformers, widely acknowledged to be critical assets in electrical networks. After the strong de-regulation of electricity markets and de-carbonization of worldwide economies, electrical networks have been changing fast. Both asset owners and equipment manufacturers are being driven to develop increasingly accurate modelling capabilities in order to optimize either their operation or their design. Temperature is a critical parameter in every electric machine and power transformers are no exception. As such, the thesis is relevant for a wide range of stakeholders, from utilities to power transformer manufacturers, as well as researchers interested in the energy industry. It is written in straightforward language and employs a highly pedagogic approach, making it also suitable for non-experts.

Hugo Campelo completed his PhD in Chemical Engineering at the University of Porto (Portugal) in 2016, but his career as a Computational Fluid Dynamics (CFD) consultant actually started ten years ago. Since 2010 he has been working for a large electromechanical group that manufactures power transformers, in which he currently coordinates a team of R&D experts focused on addressing the thermal-hydraulic challenges associated with power transformers. A CFD expert, his main interests lie in numerical fluid flow and heat transfer.

Autoren/Hrsg.

Campelo, Hugo

Inhaltsverzeichnis

1;Supervisors’ Foreword;8
2;Abstract;9
3;List of Publications;10
4;Acknowledgements;12
5;Contents;14
6;List of Figures;16
7;List of Tables;23
8;Notation;25
9;1 Introduction;30
9.1;1.1 Background;31
9.2;1.2 Shell-Type Transformers;33
9.2.1;1.2.1 Windings;38
9.2.2;1.2.2 Laminated Magnetic Core;43
9.2.3;1.2.3 T-Beams and Magnetic Shunts;43
9.2.4;1.2.4 External Cooling Equipment;45
9.3;1.3 Motivation;46
9.4;1.4 Objectives;52
9.5;1.5 Thesis Outline;53
9.6;References;53
10;2 Scale Model;56
10.1;2.1 Introduction;57
10.2;2.2 Experimental Setup;58
10.2.1;2.2.1 Scaling-Down Considerations;60
10.2.1.1;2.2.1.1 Fluid Velocities;60
10.2.1.2;2.2.1.2 Heated Dissipated in the Coil;61
10.2.2;2.2.2 Description of Experimental Setup;63
10.2.2.1;2.2.2.1 Coil (C);67
10.2.2.2;2.2.2.2 Heat Exchanger (HE);75
10.2.2.3;2.2.2.3 Manifolds (BM and TM);76
10.2.2.4;2.2.2.4 Gear Pump (GP) and Flowmeter (FM);78
10.2.2.5;2.2.2.5 DC Power Supply (DCPS);79
10.2.2.6;2.2.2.6 Data Acquisition/Control System (DACS);80
10.3;2.3 Experimental Methodology;82
10.4;2.4 Conclusions;91
10.5;References;92
11;3 CFD Scale Model;93
11.1;3.1 CFD;93
11.1.1;3.1.1 Geometry;94
11.1.2;3.1.2 Mesh;96
11.1.3;3.1.3 Boundary Conditions;98
11.1.4;3.1.4 CFD Results;102
11.2;3.2 CFD Validation;104
11.3;3.3 Conclusions;117
12;4 The FluSHELL Tool;119
12.1;4.1 Introduction;119
12.2;4.2 FluSHELL Description;121
12.2.1;4.2.1 General Description;124
12.2.2;4.2.2 Topological Model;125
12.2.3;4.2.3 Hydrodynamic Model;131
12.2.4;4.2.4 Heat Transfer Model;134
12.3;4.3 FluSHELL Calibration;146
12.3.1;4.3.1 CFD Model;147
12.3.1.1;4.3.1.1 Geometry;147
12.3.1.2;4.3.1.2 Mesh;150
12.3.1.3;4.3.1.3 Boundary Conditions;155
12.3.1.4;4.3.1.4 Results;156
12.3.2;4.3.2 Determination of Correlations;161
12.3.2.1;4.3.2.1 Friction Coefficients;162
12.3.2.2;4.3.2.2 Heat Transfer Coefficients;166
12.4;4.4 FluSHELL Results;168
12.5;4.5 Conclusions;174
12.6;References;177
13;5 FluSHELL Validation;180
13.1;Abstract;180
13.2;5.1 FluSHELL Versus Experiments;181
13.3;5.2 Adiabatic CFD Model;184
13.3.1;5.2.1 Geometry;184
13.3.2;5.2.2 Mesh;187
13.3.3;5.2.3 Boundary Conditions;188
13.3.4;5.2.4 Results;191
13.4;5.3 FluSHELL Versus Adiabatic CFD;195
13.5;5.4 Conclusions;207
14;6 Conclusions and Future Work;209
14.1;6.1 Conclusions;210
14.2;6.2 Future Work;212
14.3;References;214