Operation and Control in Power Systems

Operation and Control in Power Systems

S. R. Murty Book

Preference :

Power system engineering is a branch where practically all the results of modern control
theory can be applied. Such an application will result in economy, better quality of service and
the least inconvenience under abnormal situations, both anticipated and unforeseen.
Control system design, in general, for its analytical treatment, requires the determination
of a mathematical model from which the control strategy can be derived. While much of the
control theory postulates that a model of the system is available. It is also necessary to have a
suitable technique to determine the models for the process to be controlled. Thus, it is
required to model and identify power system components using both physical relationships
and experimental or normal operating data. The objective of system identification is the
determination of a mathematical model characterizing the operation of a system in some form.
The available information is either system outputs or some functions of outputs which may
contain measurement noise. The inputs may be known functions applied for the purpose of
identification, or unknown functions which it may be possible to monitor somehow, or a
combination of both.
The identified model may be in the form of differential equations, difference equations,
transfer functions, etc.
Even though all systems are nonlinear to some extent, the assumption of a linear model
leads to simpler models which can yield meaningful results with fairly good accuracy. A
system may be classified as stationary or non stationary. During the period of operation, when controls are implemented, the system is normally assumed to be stationary. The system equations
may be formulated either in the continuous mode or in the discrete mode. While measurements
and predicted values are available at discrete intervals, continuous representation is the most
familiar mode. Transformation from continuous to discrete formulation is a straight forward

Content :
  • Load Flow Analysis
  • Economic Operation of Power Systems
  • Optimal Load Flow
  • Unit Commitment
  • Load Frequency Control
  • Control of Interconnected Systems
  • Voltage and Reactive Power Control
  • Introduction to Advanced Topics

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