EE6002 Power System Transients | Impotent Questions | Question bank | Syllabus | Model and Previous Question papers | Download PDF

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OBJECTIVES : 

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

Review and importance of the study of transients – causes for transients. RL circuit transient with
sine wave excitation – double frequency transients – basic transforms of the RLC circuit transients.
Different types of power system transients – effect of transients on power systems – role of the study
of transients in system planning.

UNIT II SWITCHING TRANSIENTS

Over voltages due to switching transients – resistance switching and the equivalent circuit for
interrupting the resistor current – load switching and equivalent circuit – waveforms for transient
86 voltage across the load and the switch – normal and abnormal switching transients. Current
suppression – current chopping – effective equivalent circuit. Capacitance switching – effect of source
regulation – capacitance switching with a restrike, with multiple restrikes. Illustration for multiple
restriking transients – ferro resonance.

UNIT III LIGHTNING TRANSIENTS 

Review of the theories in the formation of clouds and charge formation – rate of charging of thunder
clouds – 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 

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.

UNIT V TRANSIENTS IN INTEGRATED POWER SYSTEM

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 – over voltage induced by faults -switching surges on integrated system Qualitative application of EMTP for transient computation.

TOTAL : 45 PERIODS

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EE6002 Power System Transients Questions Papers – Click here to Download 

EE6002 Power System Transients 2 marks with answers – Click here to Download 

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