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Power Systems
LFC: Two Area Control
Load frequenc...
Question
Load frequency control is achieved by properly matching the individual machine's
A
reactive powers.
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B
generated voltages.
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C
turbine inputs.
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D
turbine and generator ratings.
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Solution
The correct option is
C
turbine inputs.
turbine inputs.
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Load frequency control uses
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Two 200 MVA alternators operate in parallel. The frequency drops in first machine from 50 Hz at no load to 48 Hz at full load, where as in case of other machine, the frequency drops from 50 Hz to 47 Hz under the same conditions. If the two machines has to share a total load of 300 MW, then the maximum load at unity p.f. which can be delivered by the two machines without overloading any of them is
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Consider the following statements regarding load frequency control:
1. Time constant of automatic load frequency control is about 15 seconds.
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Which of the statements given above are correct?
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An alternator operating at 50 Hz is delivering 40 MW power to a system. Due to increase in load, generation was increased by 5 MW using droop control with frequency value dropping by 0.50% of rated value. As load further increases, the frequency of operation becomes 49.20 Hz and hence the power supplied by alternator at this frequency will be
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