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ISBN: 9788183715898

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Power System Analysis

K. B. Hemalatha

S. T. JayaChrista

Senior LecturerDept. of Electrical and Electronics Engineering

Mepco Schlenk Engineering CollegeMepco Engineering college Post(Via) Virudhunagar - 626 005.

SCITECH PUBLICATIONS ( INDIA) PVT. LTD.CHENNAI

ISBN: 9788183715898


Contents

1 Power System Analysis 1.1–1.45

1.1 Need for System Analysis in Planning and Operation ofPower System 1.2

1.2 Distinction between Steady-state and Transient State 1.31.3 Per Phase Analysis of Symmetrical Three-phase System 1.51.4 Per Unit Representation 1.10

2 Network Modelling 2.1–2.70

2.1 Introduction 2.22.2 Bus Frame of Analysis 2.22.3 Elements of Bus Admittance and Impedance Matrices 2.32.4 Primitive Network 2.42.5 Network Graph Theory 2.52.6 Incidence Matrices 2.72.7 Bus Admittance Matrix 2.112.8 Matrix inversion by pivotal condensation method 2.142.9 Formulation of Bus Impedance Matrix by Bus Building

Algorithm 2.222.10 Node Elimination by Matrix Algebra 2.582.11 Modelling of Generator, Transformer, Transmission Line,

Load, Shunt Capacitor and Shunt Reactor for ShortCircuit, Power Flow and Stability Studies 2.61

3 Short Circuit Analysis 3.1–3.102

3.1 Need for Short Circuit Study 3.13.2 Classification of Faults 3.23.3 Approximations in Modelling 3.23.4 Thevenin’s Equivalent Circuit 3.33.5 Symmetrical Short Circuit Analysis 3.33.6 Symmetrical Component Transformation 3.453.7 Sequence Impedance 3.583.8 Sequence Network of an Unloaded Generator 3.583.9 Sequence Impedances of Transmission Lines 3.603.10 Sequence Network of Transformer 3.623.11 Unsymmetrical Faults 3.673.12 Open Conductor Faults 3.92

ISBN: 9788183715898


4 Power Flow Analysis 4.1–4.68

4.1 Load Flow Problem Definition 4.24.2 Types of Buses 4.24.3 Selection of a Swing Bus 4.34.4 Load Flow Solution 4.34.5 Derivation of Power Flow Equations 4.44.6 Load Flow Solution using Gauss – Seidal Method 4.64.7 Load Flow Solution using Newton – Raphson Method 4.204.8 Comparison between the Methods Used in Load Flow

Analysis Gauss – Seidal Method 4.574.9 Computation of Slack Bus Power, Transmission Losses

and Line Flows 4.584.10 Representation of Transformers 4.60

5 Stability Analysis 5.1–5.90

5.1 Definitions 5.15.2 Types of Stability 5.15.3 Power Angle Equation of a Two Machine System 5.35.4 Methods of Improving Steady State Stability 5.55.5 Bad Effects of Instability 5.65.6 Power Angle Equation of a Salient Pole Machine 5.75.7 Conventions used in Motor and Generator 5.75.8 Swing Equation 5.85.9 Constants Used in Stability Analysis 5.105.10 Relationship between Mechanical and Electrical

Degrees 5.155.11 Determination of Change in Rotor Angle when the

Machine is Loaded 5.205.12 Solution of Swing Equation 5.235.13 Aim of Transient Stability Study 5.415.14 Equal Area Criterion 5.445.15 Multimachine Stability Analysis 5.625.16 Introduction to Voltage Stability 5.72

Index I.1–I.4

ISBN: 9788183715898


ISBN: 9788183715898


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