Reg No.:_ Name:

Max. Marks: 100

F1055 Pages: 3

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
SIXTH SEMESTER B.TECH DEGREE EXAMINATION(R&S), MAY 2019

Course Code: EE306
Course Name: POWER SYSTEM ANALYSIS
PARTA
Answer all questions, each ೧1171055 marks.
Define the term per unit quantity. Enumerate Merits and Demerits of P.U
What is the significance of current limiting reactors in power system? Where are

they located? Give examples.
How slack bus differs from other buses in a power system? What is the

significance of slack bus in load flow analysis?

What is AVR? What are the functions?

Derive condition for economic load dispatch neglecting losses.
Define penalty factors and loss coefficients in economic operation of power
system.
Explain the terms 1) steady state stability 2) dynamic stability 3) transient
stability
Write all methods to improve steady state stability limit of power system
PART ‏تا‎
‎Answer any two full questions, each carries10 marks.

A 300 MVA, 20kV three phase generator has a subtransient reactance of 20%.
The generator supplies two synchronous motors over a 64km transmission line
having transformers at both ends as shown on the single line diagram. The
ratings of the motors are:M1-200MVA, 13.2kV, 20%; M2- 100147.
13.2kV, X’=20%. The ratings of transformers are T1-350MVA, 230/20 kV,
X=10%; T2- composed of 3 single phase transformers each rated 127/
13.2kV,1OOMVA, X=10%. Series reactance of the transmission line is 0.5
ohm/km. Draw the reactance diagram with all reactances marked in p.u. Select
the generator ratings as base values.

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Duration: 3 Hours

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