Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
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two alternators A and B having 5% speed regulation are working in parallel at a station. Alternator A is rated at 15 MW while B is at 20 MW. When the total load to be shared is 12 MW, then how much of the load will be shared by the alternator B?
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- A 300V, 60KW shunt generator has 1200 turns on each pole of its field wind ing. On no- load a current of 3A in the field winding produce a terminal voltage of 300v, but on full load the shunt current has to be increased to 4.5A for the same terminal voltage at the same speed. Calculate the number of series turns per pole required for level compounding. If the series coil were wound with 12 turns per pole and had a total resistance of 0.02, What value of diverter resistance would be required to give level compounding?arrow_forward2A. What is another term for "shunt"? a) in series b) in parallel c) compounded d) none of the above 2B. Which of the following is/are a basic type of DC generator connection? a) series b) shunt c) compound d) all of the abovearrow_forwardWhat will be done to keep the alternator end voltage constant, which changes as the alternator is loaded at different loads? Please explain.arrow_forward
- Consider the following figure for a 4-pole, 3-phase, 24-slots double layer winding. Find the pole pitch and the slot pitch angle. 19, 20 12 19 20 ******** FORDEONEAZA I 200000 R'₁ ¹2 *******arrow_forwardThe incremental cost of generator 1 is Ic1 = 0.2P₁ + 60 and generator 2 is Ic2 = 0.3P₂ + 40 and the ratings of the generators are 150 MW and 250 MW. a) Find the load sharing of generator 1 for a load of 380 MW. MW (Calculate to 2 decimal places) b) Find the load sharing of generator 2 for a load of 380 MW. MW (Calculate to 2 decimal places)arrow_forwardWhat are FACTS (Flexible Alternating Current Transmission Systems) devices, and how do they enhance power system control?arrow_forward
- A) Adding resistive loads in parallel to the output terminals of a series connected DC generator will the total load resistance. a) increase b) decrease c) either "a" or "b" d) neither "a" nor "b" B) Adding resistive loads in parallel to the output terminals of a series connected DC generator will the current through the field winding. a) increase b) decrease c) either "a" or "b" d) neither "a" nor "b"arrow_forwardA generator is connected through a transformer to a synchronous motor as shown in the following figure. (All values in this problem are per unit.) Before the fault V,=0.9,1=1 with power factor 0.8 lagging. jX, P + jX ds jX" dm + E. E The reactances are Xd=0.15 , X,=0.1 , X âm=0.35. A symmetric fault occurs at P. Find the per-unit current magnitudes in the fault, the generator and the motor (a) using subtransient voltages. (b) using a Thevenin equivalent.arrow_forward
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