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EPR 512Power System

Analysis IIProf. Hossam TalaatEE– FUE- Fall 2015

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Domains of Operation

Normal Operation

Power Flow & Economic Dispatch

Power SystemPlanning

Abnormal Operation

Power System Faults

Power System Protection

Power System

Dynamics and Stability

Power System Study Areas

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50 millions people impacted . 60 GW lost More than $6 billions loss. Outages up to 36 hours. 2003 Blackout Simulation.flv

Why studying abnormal state and stability?Case Study: August 14, 2003 USA Blackout

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20 Hrs Before

Blackout

7 Hrs After Blackout

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Lines and Units Tripped

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Thursday 4th Sep. 2014, 6:00 am◦ Drop from 20 GW to 11 GW

◦ Final Report: Causes and RecommendationsIs not available !!!

Egypt’s Partial Blackout

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Suggestions for expansion planning study. Suggestions for protective relays’ settings Replacement of circuit breakers

Outcomes of stability studies

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Time Horizon of PS Dynamics

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It is the property of a PS that enables it to remain in a state of operating equilibrium under normal operating conditions and to regain an acceptable state of equilibrium after being subjected to a disturbance.

Rotor angle stability is the ability of interconnected synchronous machines to remain in synchronism (in step).

Loss of synchronism can occur between one machine and the rest of the system or between groups of machines.

Power System Stability Definitions

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The angle stability problem involves the electro-mechanical oscillations in power systems.Small Signal (Steady-state) stability: analysis of small and slow disturbances gradual power changes Transient stability: analysis of large and sudden disturbances faults, outage of a line, sudden application or removal of load

Power System Stability Definitions (cont.)

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Mechanical Analogy of Angle Stability

Mass= GeneratorRubber bands= Line

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Stability Classifications

EPM581- Protection& Switchgear Prof. Hossam Talaat

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Course Syllabus

Fall 2015/2016Title: Power System Analysis IICode: EPR 512 Credits: 3

Lectures: 3 hrs/week Tutorials: 2 hrs/week Instructor: Prof. Dr. Hossam Eldin A. TalaatE-mail: hossam_talaat@eng.asu.edu.eg

EPM581- Protection& Switchgear Prof. Hossam Talaat

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Textbooks

1- Hadi Saadat , “ Power System Analysis”, 2nd Edition, Mc Graw Hill, 2002.

2- Mohamed Zaki El-Sadek, “ Power Systems Voltage Stability and Power Quality”, 2002

EPM581- Protection& Switchgear Prof. Hossam Talaat

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Course ContentsWk Topic # Text

Book1 Introduction to Power System Stability 12 Power System Model for Stability: swing

equation, Power-angle characteristics, Vector diagrams.

11.2:11.3

1

3 Small Signal Stability: Unregulated system, Regulated system

11.4 1

4 Transient Stability: Equal Area Criterion 11.5 15 Examples on Equal Area Criterion 11.6 16 Mid I Exam7 Numerical solution of swing equation 11.7 18 Transient Stability Enhancement Methods 19 Voltage stability: concept, 1.15 210 Two-Node Systems 2.1:2.11 211 VAr Compensation and Voltage Stability 2.12:2.1

82

12 Assessment Indices 5.1:5.4 213 FACTS Devices and Voltage Stability 7.1:7.4 2

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The Swing Equation

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