Electrical Power Systems

Preface
During the last fifty years, the field of Electrical Engineering has become very diversified and
is much broader in scope now than ever before. With emerging new topic areas, ranging from
microelectro-mechanics to light-wave technology, the number of Electrical Engineering courses
available to students has considerably increased. In order to keep pace with the progress in
technology, we must adopt to provide the students with fundamental knowledge in several
areas. Power System Engineering is one of such areas. This book describes the various topics in
power system engineering which are normally not available in a single volume.
To briefly review the content of this text, Chapter 1 provides an introduction to basic
concepts relating to structure of power system and few other important aspects. It is intended
to give an overview and covered in-depth.
Chapters 2 and 3 discuss the parameters of multicircuit transmission lines. These parameters
are computed for the balanced system on a per phase basis.
Chapter 4 addresses the steady-state and transient presentation and modeling of synchronous
machine.
Chapter 5 deals with modeling of components of power system. Also, the per unit system is
presented, followed by the single line diagram representation of the network.
Chapter 6 thoroughly covers transmission line modeling and the performance and
compensation of the transmission lines. This chapter provides the concept and tools necessary
for the preliminary transmission line design.
Chapters 7 presents comprehensive coverage of the load flow solution of power system
networks during normal operation. Commonly used iterative techniques for the solution of
nonlinear algebraic equation are discussed. Different approaches to the load flow solution are
described.
Chapters 8, 9 and 10 cover balanced and unbalanced fault analysis. The bus impedance
matrix by the Z BUS building algorithms is formulated and employed for the systematic
computation of bus voltages and line currents during faults. Symmetrical components technique
are also discussed that resolve the problem of an unbalanced circuit into a solution of number
of balanced circuits.
Chapter 11 discusses upon the concepts of various types of stability in power system. In
particular, the concept of transient stability is well illustrated through the equal area criterion.
Numerical solution for the swing equation is also defined.
Chapter 12 deals with AGC of isolated and interconnected power systems. Derivation of
governor and turbine models are presented. Both steady-state and dynamic analysis are
presented. Treatment of generation rate constraint in mathematical model is also discussed.
Multiunit AGC system is discussed.
Chapter 13 discusses the AGC in restructured environment. Block diagram representation
of AGC system in restructured enviornment is discussed and equivalent block diagram is
presented for easy understanding. Different case studies are presented.
Chapter 14 deals with corona loss of transmission lines. All mathematical derivations are
presented in detail and the factors affecting the corona are discussed.