POWER SYSTEM ANALYSIS – 1 (18EE62)

POWER SYSTEM ANALYSIS – 1

• Course Code 18EE62 
• CIE Marks 40
• Number of Lecture Hours/Week (L:T:P)(L:T:P)3:2:0 
• SEE Marks 60
• Credits 04
• Exam Hours 03

Course Learning Objectives:

• · To introduce the per unit system and explain its advantages and computation.
• · To explain the concept of one line diagram and its implementation in problems.
• · To explain the necessity and conduction of short circuit analysis.
• · To explain analysis of three phase symmetrical faults on synchronous machine and simple power systems.
• · To discuss selection of circuit breaker.
• · To explain symmetrical components, their advantages and the calculation of symmetrical components of voltages and currents in un-balanced three phase circuits.
• · To explain the concept of sequence impedance and its analysis in three phase unbalanced circuits.
• · To explain the concept of sequence networks and sequence impedances of an unloaded synchronous generator, transformers and transmission lines.
• · To explain the analysis of synchronous machine and simple power systems for different unsymmetrical faults using symmetrical components.
• · To discuss the dynamics of synchronous machine and derive the power angle equation for a synchronous machine.
• · Discuss stability and types of stability for a power system and the equal area criterion for the evaluation of stability of a simple system.

Module-1

Representation of Power System Components: Introduction, Single-phase Representation of
Balanced Three Phase Networks, One-Line Diagram and Impedance or Reactance Diagram, Per Unit (PU) System, Steady State Model of Synchronous Machine, Power Transformer, Transmission of Electrical Power, Representation of Loads.

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Module-2

Symmetrical Fault Analysis: Introduction, Transient on a Transmission Line, Short Circuit of a
Synchronous Machine(On No Load), Short Circuit of a Loaded Synchronous Machine, Illustrative simple examples on power systems. Selection of Circuit Breakers.

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Module-3

Symmetrical Components: Introduction, Symmetrical Component Transformation, Phase Shift in
Star-Delta Transformers, Sequence Impedances of Transmission Lines, Sequence Impedances and
Sequence Network of Power System, Sequence Impedances and Networks of Synchronous Machine,
Sequence Impedances of Transmission Lines, Sequence Impedances and Networks of Transformers,
Construction of Sequence Networks of a Power System.

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Module-4

Unsymmetrical Fault Analysis: Introduction, Symmetrical Component Analysis of Unsymmetrical
Faults, Single Line-To-Ground (LG) Fault, Line-To-Line (LL) Fault, Double Line-To-Ground (LLG)
Fault, Open Conductor Faults.

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Module-5

Power System Stability: Introduction, Dynamics of a Synchronous Machine, Review of Power Angle
Equation, Simple Systems, Steady State Stability, Transient Stability, Equal Area Criterion, Factors
Affecting Transient Stability, Multi machine stability studies, classical representation.

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Important Links:

1. Click here to download Handwritten Notes

2. Click here to download Important Questions

Course Outcomes:At the end of the course the student will be able to:

• · Model the power system components & construct per unit impedance diagram of power system.
• · Analyze three phase symmetrical faults on power system.
• · Compute unbalanced phasors in terms of sequence components and vice versa, also develop sequence networks.
• · Analyze various unsymmetrical faults on power system.
• · Examine dynamics of synchronous machine and determine the power system stability.

Question paper pattern:

· The question paper will have ten questions.
· Each full question is for 20 marks.
· There will be 2 full questions (with a maximum of three sub questions in one full question)
from each module.
· Each full question with sub questions will cover the contents under a module.
· Students will have to answer 5 full questions, selecting one full question from each module.

Text Book

1. Elements of Power System William D. StevensonJr McGraw Hill 4th Edition, 1982

Reference Books

1 Modern Power System D. P. Kothari McGraw Hill 4th Edition, 2011
2 Power System Analysis and Design J.Duncan Glover et al Cengage 4th Edition, 2008
3 Power System Analysis Hadi Sadat McGraw Hill 1st Edition, 2002