PRODUCTION OF ELECTRICAL ENERGY (EEEP3106)
Electrical and Electronic Engineering - EEE
Semester: First Semester
Level: 300
Year: 2021
UNIVERSITY OF BAMENDA
COLLEGE OF TECHNOLOGY
FIRST SEMESTER EXAMINATION
COURSE INSTRUCTOR: Pr NFAII / Mr. FOTSO
MONTH: July COURSE CODE & NUMBER: EEEP3106
YEAR: 2U18 COURSE TITLE: Production of Electrical Energy
DATE: 07/2018 TIME:
TIME ALLOWED: 2 HOURS CREDIT VALUE: 3
INSTRUCTION: Answer ALL questions. Mark allocation for each question is given
QUESTION I (40 pts)
. Explain the difference between a base load and a peak load generating plant.(4 pts)
. Why are nuclear power stations not suited to supply peak loads? (3 pts)
. Referring to the coal mine, we have the choice of hauling the coal to a generating plant or installing the
generating plant next to the mine mouth. What factors come into play in determining the best solution?
(10 pts)
. What is the best indicator of stability (or instability) of an electric utility system? (3 pts)
. What is meant by the term network? (4 pts)
. Give two reasons why electric utility systems are interconnected. (6 pts)
. The demand of a municipality regularly varies between 60 MW and 110 MW in the course of one day, the
average power being 80 MW. To produce the required energy, we have the following options:
a) Install a base-power generating unit and a diesel-engine peaking plant,
b) Install a base-power generating unit and a pumped-storage unit.
What are the respective capacities of the base power and peaking power plants in each case? (2X5 pts)
QUESTION U (30 pts)
On a particular day, the head of Grand Coulee dam is 85 m and the generators deliver 6000 MVA at a power
factor of 0.9 lagging. Assuming the average turbine efficiency is 0.92 and the average generator efficiency is
0.98, determine:
a) The type of hydropower station and justify. (6 pts)
b) The active power output (MW). (6 pts)
c) The reactive power supplied to the system (MVAR). (6 pts)
d) The amount of water flowing through the turbines (m
3
/s). (6 pts)
e) The linear velocity of water inside the penstock. (6 pts)
f) The radius of turbine if the needed speed is 50 rps.(6 pts)
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