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The book will be particularly useful to: 1. Transformer designers and researchers engaged in optimization and qualityenhancement activities in today’s competitive environment. 2. Utility engineers who would like to learn more about the system interaction aspects of transformers in an interconnected power system to improve on specifications and employ diagnostic tools for condition monitoring. 3. Undergraduate and postgraduate students who wish to integrate traditional transformer theory with modern computing practices
[...]... directly affects the rating and size of the transformer Presently, there are two types of design: single-core and two-core design Single-core design is used for small phase shifts and lower MVA/voltage ratings Two-core design is normally used for bulk power transfer with large ratings of phase shifting transformers It consists of two transformers, one associated with the line terminals and other with the tap... Insulation 12.4 Challenges in Design and Manufacture of Transformers 12.5 Computer-Aided Design and Analysis 12.6 Monitoring and Diagnostics 12.7 Life Assessment and Refurbishment References 437 437 438 440 441 443 445 449 449 Appendix A: Fault Calculations A1 Asymmetrical Fault with No In-Feed from LV Side A2 Asymmetrical Fault with In-Feed from LV Side 453 454 457 Appendix B: Stress and Capacitance Formulae...viii Preface and creepage withstand are very useful to designers Procedures for the design of major and minor insulation systems are presented Chapter 9 deals with the thermal aspects of transformer design After a description of the modes of heat transfer, various cooling systems are described The insulation aging phenomenon and life expectancy are also discussed A number... designer has to adequately check the electromagnetic and thermal aspects of design For transformers used with HVDC converters, insulation design is the most challenging design aspect The insulation has to be designed for combined AC-DC voltage stresses j Furnace duty transformers: These are used to feed the arc or induction furnaces They are characterized by a low secondary voltage (80 to 1000 V) and. .. oilcooled transformer Design: With the rapid development of digital computers, the designers are freed from the drudgery of routine calculations Computers are widely used for optimization of transformer design Within a matter of a few minutes, today’s computers can work out a number of designs (by varying flux density, core diameter, current density, etc.) and come up with an optimum design The real benefit... a lower core loss and noise level; top yoke is assembled after lowering windings and insulation at the assembly stage - Automated winding machines for standard distribution transformers - Vapour phase drying for effective and fast drying (moisture removal) and cleaning - Low frequency heating for the drying process of distribution transformers - Pressurized chambers for windings and insulating parts... grateful to Prof J.Turowski, Mr P Ramachandran and Prof L.Satish for constructive comments Ms Rita Lazazzaro and Ms Dana Bigelow of Marcel Dekker, Inc., constantly supported us and gave good editorial input Finally, the overwhelming support and encouragement of our family members is admirable S.V.Kulkarni would like to particularly mention the sacrifice made and moral support given by his wife, Sushama... continuous improvement in watts/kg and volt-amperes/kg characteristics in the rolling direction The core material developments are spearheaded by big steel manufacturers, and the transformer designers can optimize the performance of core by using efficient design and manufacturing technologies The core building technology has improved from the non-mitred to mitred and then to the step-lap construction... mature product, there are still a number of design, manufacturing and power system interaction issues that continue to attract the attention of researchers This book addresses many of these issues and provides leads to most of the remaining ones It encompasses all the important aspects of transformer engineering including the recent advances in research and development activities It also propagates... V.R.Sule, M.B.Patil, A.M.Kulkarni and Kishore Chatterjee, for their help in reviewing the book Thanks are also due to Mr V K.Tandon, who suggested editorial corrections Research associates Mr Sainath Bongane, Mr Sachin Thakkar and Mr G D.Patil helped tremendously, and the excellent quality of the figures is due to their efforts Ph.D students Mr G.B.Kumbhar, Mr A.P.Agalgaonkar and Mr M.U.Nabi also contributed . losses and related theory of eddy currents, short-circuit forces and withstand, part winding resonance phenomena, insulation design, and design aspects of transformers for rectifier, furnace and. Power System State Estimation: Theory and Implementation, Ali Abur and Antonio Gómez Expósito 25. Transformer Engineering: Design and Practice, S.V.Kulkarni and S.A.Khaparde ADDITIONAL VOLUMES. 440 12.4 Challenges in Design and Manufacture of Transformers 441 12.5 Computer-Aided Design and Analysis 443 12.6 Monitoring and Diagnostics 445 12.7 Life Assessment and Refurbishment 449 References