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EL 6633 – Transients, Surges and Faults in Power Systems By: Gerry Volpe Fall 2009 Objective: At the end of the term the participants should be able to analyze and compute the most common transients that occur in power systems. These are classified as line switching and lightning disturbances. Preventative methods to minimize these effects will be studied. Switching transients in simple electrical circuits will be analyzed and modeled with appropriate circuit analysis software. Significant focus will be on Transient Recovery Voltage (TRV) Non-linear circuits devices needed to protect equipment and personnel will be introduced to form a basis for various class projects. Three-phase circuits including transformers, machines, and other circuit elements will be studied under normal and fault conditions. Appropriate power system software will be utilized for analysis verification. Symmetrical components will be studied to analyze symmetrical and asymmetrical faults. Introduction to transmission line theory. Transients on transmission lines due to reflections. Steady state analysis under load conditions Textbook: “Electrical Transients in Power Systems”, A. Greenwood, John Wiley, 1991 ISBN: 978-0-471-62058-7 Reference Material: [1] L. Van der Sluis, Transients in Power Systems, John Wiley & Sons, 2001. ISBN: 978-0-471-48639-8 [2] P.E. Viemeister, "The Lightning Book", MIT Press, 1972. [3] N. R. Watson and N. Watson, “Power Systems Electromagnetic Transients Simulation”, IEE Power & Energy Series, 2001. [4] P. Chowdhuri, “Electromagnetic Transients in Power Systems”, Research Studies Press, 1996. [5] J. Glover, et al. “Power System Analysis and Design”, Thomson, 2008 [6] L. Faulkenberry and W. Coffer, “Electrical Power Distribution and Transmission”, Prentice Hall, 1996 EL 6633 – Transients, Surges and Faults in Power Systems ------------------------------------------------------------------------- Dr. Gerald T. Volpe Adjunct Professor, Polytechnic University of NY 238 Westwood Road, Stamford, CT, 06902 [email protected] SYLLABUS SCHEDULE WK DATE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 SEPT 9 SEPT 16 SEPT 23 SEPT 30 OCT 7 OCT 14 OCT 21 OCT 22 NOV 5 NOV 12 NOV 19 DEC 2 DEC 9 DEC 16 Dec 23 TOPIC Introduction Electrical Circuits Review The Non-Linear Element Power Systems Modeling** Three Phase Systems QUIZ #1 Switching Transients Transient Recovery Voltage Faults in 3 Phase Systems Circuit Breaker Action** Lightning Induced Transients THANKSGIVING Transmission Lines Transmission Lines Transmission Lines Final exam * CN=Class Notes ** See Schneider Electric website TxtCh/CLNotes T-1 CN* T-2 CN CN T-3 T-3 CN T-4 T-7 T-3 & CN T-3 & CN T-3 & CN Assignment Prob. Set 1 Prob. Set 2 Prob. Set 4 Prob. Set 5 Prob. Set 3 *** Prob. Set 6 EL 6633 – Transients, Surges and Faults in Power Systems Detailed Syllabus 1. Introduction a. Discussion of lightning, lightning rods and arresters b. Circuit breakers for over current protection c. Surge protection for equipment d. Ground shielding 2. Electric Circuits: a. Current and voltage sources b. Resistance, inductance and capacitance c. Series and parallel RC,RL and RLC circuits d. Natural and forced responses e. MCAP or Workbench circuit examples f. Transient Recovery Voltage (TRV) 3. The Non-Linear Element a. Arc analysis b. The Varistor c. Lightning arrester d. Semiconductors; SCR and Thyristor switches 4. Power System Modeling a. Transmission lines b. Cables c. Transformers d. Generators 5. Three Phase Systems a. Review of balanced three phase systems b. Symmetrical faults-equivalent single phase system c. Asymmetrical faults-Symmetrical components 6. Transients in Three-Phase Systems a. Symmetrical components b. Modal transformations c. Connection of lines, transformers, capacitors and faults 7. Transmission Lines a. Derivation of transmission line equation b. Reflection diagram c. Steady state analysis d. Pi equivalent for short lines 8. Lightning a. Description of the problem b. Physical phenomena c. Effects in the power system EL 6633 – Transients, Surges and Faults in Power Systems Grading: Quizzes 50% Projects 30% Homework Assignments 20% Plagiarism clause: Each student is expected to do his/her own work. If Internet information is used for an assignment or project it is required to cite the URL address of the source. Not doing so is plagiarism. If collaboration is warranted on an assignment or project, permission is required by the instructor well in advance of the due date. Violation of this rule is considered dishonest and the offender will be subject to disciplinary action. http://home.att.net/~gbvolpe/Transients_Syllabus.htm