## TIEE3043 Syllabus - Power System Transients - 2022 Regulation Anna University

TIEE3043

POWER SYSTEM TRANSIENTS

L T P C

3003

OBJECTIVE:
• To study the generation of switching transients and their control using circuit – theoretical concept.
• To study the mechanism of lighting strokes and the production of lighting surges.
• To study the propagation, reflection and refraction of travelling waves.
• To study the impact of voltage transients caused by faults, circuit breaker action, load rejection on integrated power system.

UNIT I

INTRODUCTION AND SURVEY

(7+2 Skill) 9

Sources of different types of transients - RL circuit transient with sine wave excitation - double frequency transients - basic transforms of the RLC circuit transients - study of transients in system planning - Importance of grounding.

UNIT II

SWITCHING TRANSIENTS

(7+2 Skill) 9

Basic concept of switching transients - resistance switching and equivalent circuit for interrupting the resistor current - load switching and equivalent circuit - waveforms for transient voltage across the load and the switch - normal and abnormal switching transients. Current suppression - current chopping - effective equivalent circuit - capacitance switching with a restrike, with multiple restrikes - ferro resonance.

UNIT III

LIGHTNING TRANSIENTS

(7+2 Skill) 9

Theories of cloud formation - mechanism of lightning discharges and characteristics of lightning strokes – model for lightning stroke - factors contributing to good line design - protection using ground wires - tower footing resistance - Interaction between lightning and power system.

UNIT IV

TRAVELING WAVES ON TRANSMISSION LINE COMPUTATION OF TRANSIENTS

(7+2 Skill) 9

Computation of transients - transient response of systems with series and shunt lumped parameters and distributed lines. Traveling wave concept - step response - Bewely’s lattice diagram - standing waves and natural frequencies - reflection and refraction of travelling waves. Computation of overvoltages using EMTP.

UNIT V

TRANSIENTS IN INTEGRATED POWER SYSTEM

9

The short line and kilometric fault - distribution of voltages in a power system - Line dropping and load rejection - voltage transients on closing and reclosing lines - overvoltage induced by faults - switching surges on integrated system Qualitative application of EMTP for transient computation.

TOTAL: 45 PERIODS

COURSE OUTCOMES: After completing the course, the students will be above to
CO1: Explain the principles of transients and its concepts
CO2: Know the different types of switching transients and the way to draw the necessary equivalent circuit.
CO3: Explain the concepts behind lighting and the way to protect the same.
CO4: Compute the transient behavior in transmission line
CO5: Explain the behavior of the Circuit during switching and to learn the simulation tool.

TEXT BOOKS:
1. Allan Greenwood, ‘Electrical Transients in Power Systems’, Wiley Inter Science, New York, 2nd Edition, 1991.
2. Pritindra Chowdhari, “Electromagnetic transients in Power System”, John Wiley and Sons Inc., Second Edition, 2009.
3. C.S. Indulkar, D.P.Kothari, K. Ramalingam, ‘Power System Transients – A statistical approach’, PHI Learning Private Limited, Second Edition, 2010.

REFERENCES:
1. M.S.Naidu and V.Kamaraju, ‘High Voltage Engineering’, Tata McGraw Hill, Fifth Edition, 2013.
2. R.D. Begamudre, ‘Extra High Voltage AC Transmission Engineering’, Wiley Eastern Limited, 1986.
3. Y.Hase, Handbook of Power System Engineering,” Wiley India, 2012.
4. J.L.Kirtley, “Electric Power Principles, Sources, Conversion, Distribution and use,” Wiley, 2012.