Riassunto
The study of circuits is the foundation on which most other courses in the electrical engineering curriculum are based. For this reason the first course in circuit analysis must be appropriate to the succeeding specializations, which may be classified into two groups. One is a specialization in electro nics, microelectronics, communications, computers etc. , or so-called low current, low-voltage engineering. The other is in power electronics, power systems, energy conversion devices etc. , or so-called high-current, high voltage engineering. It is evident that although there are many common teaching topics in the basic course of circuit analysis, there are also certain differences. Unfortunately most of the textbooks in this field are written from the 'electronic engineer's viewpoint', i. e. with the emphasis on low current systems. This brought the author to the conclusion that there is a definite disad vantage in not having a more appropriate book for the specializations in high-current, high-voltage engineering. Thus the idea for this book came into being. The major feature distinguishing this book from others on circuit analysis is in delivering the material with a very strong connection to the specializations in the field of power systems, i. e. in high-current and high voltage engineering. The author believes that this emphasis gives the reader more opportunity for a better understanding and practice of the material which is relevant for power system network analysis, and to prepare students for their further specializations.
Contenuti
1 Topological methods of circuit analysis.- 1.1 Introduction.- 1.2 The concept of a graph.- 1.3 Incidence, loop and mesh matrices.- 1.4 Generalized matrix approach in circuit analysis.- 1.5 Tellegen’s theorem and conservation of energy.- 1.6 Dual graphs and dual circuits.- 1.7 Computer-aided analysis of very complex circuits.- 2 Sinusoidal steady-state analysis.- 2.1 Introduction.- 2.2 The phasor concept and complex representation of sinusoids.- 2.3 Phasor relationships for R, L and C elements; complex impedance and admittance.- 2.4 Analysis of complex a.c. circuits.- 2.5 Resonance in a.c. circuits.- 2.6 Energy and power in a.c. circuits.- 2.7 Linear and circle diagrams.- 3 Magnetically Coupled Circuits.- 3.1 Introduction.- 3.2 Mutual inductance.- 3.3 Series and parallel connections of coupled elements.- 3.4 Energy storage and power transfer.- 3.5 Transformers.- 3.6 Resonance in coupled circuits.- 3.7 Circuits with more than two coupled elements.- 4 Three-phase systems.- 4.1 Introduction.- 4.2 Polyphase circuits.- 4.3 Three-phase generators.- 4.4 Three-phase connections.- 4.5 Power measurements in three-phase systems.- 4.6 Three-phase transformers.- 4.7 The rotating magnetic field.- 4.8 The principle of induction (asynchronous) and synchronous machines.- 4.9 Symmetrical components.- 5 Non-sinusoidal behavior of electric circuits.- 5.1 Introduction.- 5.2 Fourier series.- 5.3 Circuit analysis for non-sinusoidal functions.- 5.4 Characteristics of non-sinusoidal functions.- 5.5 Power due to non-sinusoidal voltages and currents.- 5.6 Factors characterizing non-sinusoidal waves.- 5.7 Harmonics in three-phase systems.- 6 Transmission lines.- 6.1 Introduction.- 6.2 Transmission line (TL) parameters.- 6.3 Transmission line equations.- 6.4 Sinusoidal response of a transmission line.- 6.5 Waves in transmission lines.- 6.6 Solution of transmission line equations.- 6.7 Characteristic parameters of a transmission line.- 6.8 Some properties of transmission lines.- 6.9 A transmission line in various operating conditions.- 6.10 Equivalent circuit of a transmission line.- 6.11 Ladder network as a TL model.- 7 Transient analysis using Laplace transform techniques.- 7.1 Introduction.- 7.2 Definition of the Laplace transform.- 7.3 Laplace transform of some simple time functions.- 7.4 Basic theorems of the Laplace transform.- 7.5 Initial-value and final-value theorems.- 7.6 Convolution theorem.- 7.7 Inverse transform and partial-fraction expansions.- 7.8 Circuit analysis with the Laplace transform.- 8 Transient behavior of transmission lines (TL).- 8.1 Introduction.- 8.2 The differential equations of TL and their solution.- 8.3 Travelling-wave properties in a transmission line.- 8.4 Wave formations in TL at their connections.- 8.5 Wave reflections.- 8.6 Successive reflections of waves.- 8.7 Laplace transform analysis of transients in TL.- 8.8 Line with only LG or CR parameters.- Appendix A.- Appendix B.
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