Presently, the Electrical Power Systems (EPS) are overloaded, due to its expansion of long transmission lines, new lines and over burden, etc. For this cause, even though for small disturbances, the oscillations in the generator are rise exponentially and the system does not comes to dynamic stable state, particularly during heavy load periods. If this problem is not resolved properly, it may cause instability. Damping of these oscillations can be enhanced by placing suitable controllers to the system. This book is aimed at exploring the issue of dynamic stability problem in Single Machine Infinite Bus (SMIB) power systems and its mitigation applying power system controllers.
The conventional methods to mitigate these problems are to add additional signals to the generator exciter and compensate the fluctuations of power flow through transmission network. Power System Stabilizer (PSS) and Series Vectorial Compensator (SVeC) Flexible Alternating Current Transmission System (FACTS) device have remarkable capability to perform these tasks. The objective of this book is to present a detailed study, simulation and analysis of the dynamic stability problem, and its mitigation by applying PSS and SVeC FACTS controller. The simulation results have been presented employing eigenvalue and time domain analysis in MATLAB.
The book started with fundamental discussions on dynamic stability problems and their common features. The modelling of PSS and SVeC FACTS controller, and their installation in SMIB power system, is the major thrust area of this book. The performance of the SVeC over PSS has been shown in face of commonly occurring power system disturbances.
The salient features of this book are : (i) Overview and literature survey (ii) Mathematical derivation of multimachine two-axis model, model of supplementary damping controllers for PSS and SVeC FACTS device for evaluation of system matrix and eigenvalue, Multimachine model with PSS and coordinated control of SVeC with FACTS device, in order to mitigate small signal stability problem (iii) State Feedback Controller based on quadratic concept to the Coordinated Control of SVeC with PSS to damp oscillations in a test system(iv) Nonlinear State Feedback Controller based on sliding mode concept to the Coordinated Control of SVeC with PSS to damp oscillations in a test system.
The contents of this book will be useful for all levels of students (UG, PG) and professors of Electrical Engineering for the study and analysis of power system small signal stability problem and its control in particular will be a ready reference for post graduate and doctoral students in Electrical and allied branches of Engineering. This book will also be a good resource for the practicing engineers, research scholars, or fellows of power system.
