Power System Analysis & Stability

SummaryThe stability of an interconnected power system is its ability to return to normal or stable operation after having been subjected to some form of disturbance. Conversely, instability means a condition denoting the loss of synchronism or falling out of step. Stability considerations have been recognized as an essential part of power system planning for a long time. With interconnected systems continually growing in size and extending over vast geographical regions, it is becoming increasingly more difficult to maintain synchronism between various parts of a power system.

Definitions

Some Inspirational Images of Power systems with and without stability

EFFECTS IF POWER SYSTEM LOSSES STABILITY

GATE/IES SPECIAL

Power systems - click here to download

OVERVIEWS OF POWER SYSTEM (MY SPECIAL DOCUMENTARIES IN POWER SYSTEM STABILITIES)

Overviews

Overview1

Overview2

Overview3

Topic

INDIAN POWER SECTOR OVERVIEW: present Indian generation fuels and its sharing’s, per capita energy consumption, GDP growth rate-load demands, ecological imbalance, grid interconnecting modules, future technologies in power systems

POWER SYSTEM STABILITY AND ITS IMPORTANCE: power system stability, energy conservations, and its importance, power system analogies, the importance of power system stability, blackouts, drawbacks of conventional stability improvement schemes, FACT DEVICES

Power system analysis and stability: Introduction, analysis of Power systems, symmetrical and asymmetrical faults, Sequence

impedances and networks, stability, induction motor operation during unbalanced conditions

PDF

PPT

BEST INTRODUCTIONS AND OVERVIEW TO POWER SECTORS

Presenter

Prof. D. P. Kothari

Prof. B.G. Fernandes

Topic

POWER SYSTEMS OVERVIEW: Generation in the world and India, the importance of the eco friendly system, energy conservation, present technologies in the world

POWER ELECTRONICS OVERVIEW: Generation in world and India, the importance of eco-friendly system, energy conservation, present technologies in the world

PDF

Do U want to Learn more about Stability (research in deep explanation) by Gurunath Gurrola, Ph.D, IISC-Click here to Download PPT

Chapter Wise Notes (by ReddyPrasad)

Unit No

Unit 1

Unit 2

Unit 3&4

Unit 5&6

Unit 7

Unit 8

Topic

REPRESENTATION OF POWER SYSTEM COMPONENTS: Circuit models of Transmission line, Synchronous machines, Transformers, and load. Single line diagram, impedance and reactance diagrams.

Per unit system, per unit impedance diagram of the power system.

SYMMETRICAL 3 - PHASE FAULTS: Analysis of Synchronous machines and Power system.

Transients on a transmission line, Short-Circuit currents and the reactance of synchronous machines with

and without load.

SYMMETRICAL COMPONENTS: Introduction, analysis of unbalanced load against balanced Three-phase

supply, neutral shift. Resolution of unbalanced phasors into their symmetrical components, Phase

shift of symmetrical components in star-delta transformer bank, Power in terms of symmetrical

components, Analysis of balanced and unbalanced loads against unbalanced 3 phase supply, Sequence

impedances, and networks of power system elements (alternator, transformer and transmission line)

Sequence networks of power systems. Measurement of sequence impedance of a synchronous generator.

UNSYMMETRICAL FAULTS: L-G, L-L, L-L-G faults on an unbalanced alternator with and without

fault impedance. Unsymmetrical faults on a power system with and without fault impedance. Open

conductor faults in the power system.

STABILITY STUDIES: Introduction, Steady-state and transient stability. Rotor dynamics and the swing

equation. Equal area criterion for transient stability evaluation and its applications.

UNBALANCED OPERATION OF THREE PHASE INDUCTION MOTORS: Analysis of three

phase induction motor with one line open., Analysis of three-phase induction motor with unbalanced

voltage.

PDF Notes

PPT

PPT-2

Handwritten Notes (Unit Wise)

Unit No

Unit 1

Extra

………..

Unit 2&3&4

Unit 5&6

Unit 7

Topic

REPRESENTATION OF POWER SYSTEM COMPONENTS: Circuit models of Transmission line, synchronous machines, Transformers, and load. Single line diagram, impedance and reactance diagrams. Per unit system, per-unit impedance diagram of the power system.

POWER FLOW ANALYSIS

Specified quantities and measured quantities, Generator, load, slack bus analysis, Newton-Raphson, gaus-seidal methods to calculate Real and reactive powers.

SYMMETRICAL 3 -PHASE FAULTS:

Analysis of Synchronous machines and Power systems. Transients on a transmission line, Short-Circuit currents and the reactance of synchronous machines with and without load.

SYMMETRICAL COMPONENTS:

Introduction, analysis of unbalanced load against balanced Three-phase supply, neutral shift. Resolution of unbalanced phasors into their symmetrical components, Phase shift of symmetrical components in star-delta transformer bank, Power in terms of symmetrical components, Analysis of balanced and unbalanced loads against unbalanced 3 phase supply, Sequence impedances, and networks of power system elements (alternator, transformer and transmission line) Sequence networks of power systems. Measurement of sequence impedance of synchronous generator.

UNSYMMETRICAL FAULTS: L-G, L-L, L-L-G faults on an unbalanced alternator with and without. Fault impedance. Unsymmetrical faults on a power system with and without fault impedance. Open conductor faults in the power system.

STABILITY STUDIES:

Introduction, Steady-state and transient stability. Rotor dynamics and the swing

Equation. Equal area criterion for transient stability evaluation and its applications.

Handwritten Notes