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2. Robert Kreitner& MamataMohapatra, “Management”, Biztantra, 2008.
3. Harold Koontz & Heinz Weihrich “Essentials of Management” Tata McGraw Hill, 1998.
4. Tripathy PC & Reddy PN, “Principles of Management”, Tata McGraw Hill, 1999.

PROFESSIONAL ELECTIVE FOR SEMESTER VI
PROFESSIONAL ELECTIVES II

EE17E61 POWER SYSTEMS TRANSIENTS L T P C
3 0 0 3
OBJECTIVES
 To understand importance of study of transients, different types of power system transients and
its effect on power system.
 To analyze the over voltages due to switching transients by resistance, load and capacitive
switching.
 To analyze the over voltages due to lightning transients, protection of power system from
lightning.
 To analyse and compute transients using travelling wave equations on transmission line and
repeated reflection by bewely’s lattice diagram.
 To study about transient in integrated power system and transients computation using Electro
Magnetic Transients Program(EMTP).

UNIT I INTRODUCTION 9
Introduction of transients. Source and Causes of transients. Classification of over voltages. Definitions
and types of transients. RL circuit transient with sine wave excitation. Basic transforms of the RLC
circuits. Effect of transients on power systems. Importance of study of transients in system planning.

UNIT II SWITCHING OVERVOLTAGES 9
Circuit closing transients, Types of Switching: Resistance switching, Load switching, Capacitance
switching. Normal and abnormal switching transients. Ferro resonance. Very Fast Transient Overvoltage
(VFTO).

UNIT III LIGHTNING OVERVOLTAGES 9
Lightning: Physical phenomena of lightning. Interaction between lightning and power system. Factors
contributing to good line design, Conventional lightning protection schemes for transmission lines and
terminal equipments, Overvoltage protective devices. Insulation co-ordination

UNIT IV COMPUTATION OF TRANSIENTS 9
Travelling wave concept: Bewely’s lattice diagram. Reflection, Refraction and behavior of travelling
waves at the line terminations. Computation of transients: Transient response of systems with series and
shunt lumped parameters and distributed lines (Wave Equation). Introduction to EMTP for transient
computation. Principle of digital computation

UNIT V TRANSIENTS IN INTEGRATED POWER SYSTEM 9

Curriculum and Syllabus | B.E. Electrical and Electronics Engineering | R2017 Page 84