Computer-Aided Power Systems Analysis, Second Edition / Edition 2

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Computer applications yield more insight into system behavior than is possible by using hand calculations on system elements. Computer-Aided Power Systems Analysis: Second Edition is a state-of-the-art presentation of basic principles and software for power systems in steady-state operation.

Originally published in 1985, this revised edition explores power systems from the point of view of the central control facility. It covers the elements of transmission networks, bus reference frame, network fault and contingency calculations, power flow on transmission networks, generator base power setting, and state estimation from on-line measurements.

The author develops methods used for full-scale networks. In the process of coding and execution, the user learns how the methods apply to actual networks, develops an understanding of the algorithms, and becomes familiar with the process of varying the parameters of the program.

Intended for users with a background that includes AC circuit theory, some basic control theory, and a first course in electronic machinery, this book contains material based upon the author’s experience both in the field and in the classroom, as well as many Institute of Electrical and Electronic Engineers (IEEE) publications. His mathematical approach and complete explanations allow readers to develop a solid foundation in power systems analysis.

This second edition includes a CD-ROM with stand-alone software to perform computations of all principles covered in the chapters. Executable programs include 0,1,2 conversions, double-hung shielded transmission line parameters, zero and positive bus impedance computations for unbalanced faults, power flow, unit commitment, and state estimation.

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Product Details

  • ISBN-13: 9781420061062
  • Publisher: Taylor & Francis
  • Publication date: 11/20/2008
  • Edition description: New Edition
  • Edition number: 2
  • Pages: 394
  • Product dimensions: 7.10 (w) x 10.10 (h) x 1.00 (d)

Table of Contents

Central Operation and Control of Power Systems


Control Center of a Power System

Digital Computer Configuration

Automatic Generation Control for a Power System

Area Control Error


CPS2, 10 Min Average

Disturbance Conditions

Operation without Central Computers or AGC

Parallel Operation of Generators

Network Power Flows

Oversimplified Power Flow (dc Power Flow)

Area Lumped Dynamic Model



Elements of Transmission Networks

Phasor Notation

Symmetrical Component Transformation

Floating Voltage Base Per-Unit Systems

Overhead Transmission Line Representation

Inductance of Long Parallel Conductors

Balanced Three-Phase Lines

Unbalanced Lines

Capacitance of Transmission Lines

General Method to Determine Aerial Transmission Line Parameters

Transformer Representation

Wye–Delta and Phase-Shift Transformers

Multiple-Winding Transformers

Synchronous Machine Representation

Steady-State Synchronous Machine Equivalent

Short-Circuit Characteristics

Transient-Time-Frame Synchronous Machine Equivalent

Subtransient-Time-Frame Synchronous Machine Equivalent



Bus Reference Frame

Linear Network Injections and Loads

Bus Impedance Matrix for Elements without Mutual Coupling

Adding a Tree Branch to Bus p

Adding a Tree Branch to the Reference

Adding a Cotree Link between Buses p and q

Adding a Cotree Link from Bus p to Reference

The Bus Admittance Matrix

Bus Impedance Matrix for Elements with Mutual Coupling

Inversion of the YBUS Matrix for Large Systems

Tinney’s Optimally Ordered Triangular Factorization [3]

Tinney’s Schemes for Near-Optimal Ordering

Several Iterative Methods for Linear Matrices

Gaussian Iteration

Gauss-Seidel Iteration



Network Fault and Contingency Calculations

Fault Calculations Using ZBUS

Approximations Common to Short-Circuit Studies

Fault Calculations Using the YBUS Table of Factors

Contingency Analysis for Power Systems

Contingency Analysis for Power Systems

Contingencies Using ZBUS in a Superposition Method

ZBUS Line Contingency Method

Using the YBUS Table of Factors for Contingencies

Double Contingencies Using YBUS Table of Factors (Balanced Case)



Power Flow on Transmission Networks

Slack Bus

ZBUS Formulation for Load-Flow Equations

Gauss or Gauss-Seidel Iteration Using YBUS

Newton-Raphson Iterative Scheme Using YBUS

Approximations to the Jacobian in the Newton-Raphson Method

Adjustment of Network Operating Conditions

Operational Power Flow Programs



Generator Base Power Setting

Economic Dispatch of Generation without Transmission Line Losses

Economic Dispatch of Generation with Line Losses

On-line Execution of the Economic Dispatch

Day-Ahead Economic Dispatch with a Variable Number of Units On-line

Power Transmission Line Losses for Economic Dispatch

Utilizing the Load-Flow Jacobian for Economic Dispatch

Economic Exchange of Power between Areas

Economy A Program



State Estimation from On-line Measurements

The Line Power Flow State Estimator

State Estimation and Noisy Measurements

Monitoring the Power System

Determination of Variance S2 to Normalize Measurements



Appendix A: Conductor Resistance and Rating



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