Transformer Engineering Design, Technology, and Diagnostics Second Edition By S.V. Kulkarni and S.A. Khaparde

Transformer Engineering Design, Technology, and Diagnostics Second Edition By S.V. Kulkarni and S.A. Khaparde

Preface :

There have been considerable advancements in various aspects of transformer engineering since the publication of the first edition in 2004. Improvements can be clearly seen in computational capabilities and monitoring/diagnostic techniques. Such new developments and encouraging feedback received on the first edition prompted the authors to embark on the task of writing the second edition. Three new chapters have been introduced in the second edition, Electromagnetic Fields in Transformers: Theory and Computations, Transformer–System Interactions and Modeling, and Monitoring and Diagnostics. The chapter on Recent Trends in Transformer Technology has been completely revised to reflect the latest and emerging trends in the various facets of the transformer technology. Chapter 6 on short-circuit strength aspects has been updated to bring more clarity on failure mechanisms involving buckling, tilting, and spiraling phenomena. Various factors of safety are defined along with procedures for calculating them. An appendix explaining a step-by-step procedure for designing a transformer is added, which should be beneficial to engineers in the transformer industry and the student community. A few improvements have been incorporated in the other chapters as well. Understanding the basics of electromagnetic fields is an essential prerequisite for doing advanced computations. Chapter 12 explains the field theory relevant to transformer engineering in a simple manner. Concepts from vector algebra and vector calculus are first explained followed by corresponding examples which help understand the behavior and distribution of fields inside transformers. Properties of insulating and magnetic materials used in transformers are explained from a fundamental electromagnetic perspective. Finite element method (FEM) is widely used for analysis and optimization of transformers. While using commercial software, the knowledge of the FEM theory helps researchers and practicing engineers solve complex problems and easily interpret field solutions. The theory of FEM is explained through the solution of one-dimensional and two-dimensional problems that represent typical electrostatic and magnetostatic fields encountered in transformers. After explaining static, time-harmonic and transient formulations, advanced coupled field computations involving electromagnetic fields and external networks/other physical fields are elaborated. Brief theory/procedures for dealing with hysteresis and magnetization/magnetostrictive forces are also given at the end.