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Two synchronous generators need to be connected in parallel to supply a load of 10 MW. The first generator supplies three times the amount of the second generator. If the load is supplied at 50 Hz and both generators have a power drooping slope of 1.25 MW per Hz:

a. Determine the set-point frequency of the first generator.

b. Determine the set-point frequency of the second generator.

Answer :

In this problem, the load of 10 MW is to be supplied at a of 50 Hz. Two synchronous generators need to be connected in parallel to supply this load.

Let's assume the rating of the second generator as G2. Then the rating of the first generator, G1 = 3G2.From the problem statement, we know that the power drooping slope is 1.25 MW/Hz. The frequency decreases by 1 Hz when the load increases by 1.25 MW. At the set-point frequency, the generators will share the load equally.

Let's assume that the frequency of G1 is f1 and the frequency of G2 is f2. Therefore, the set-point frequency of the first generator (G1) is 53.33 Hz and that of the second generator (G2) is 51.11 Hz.

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