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Problem 1: A three-phase transformer has the following name plate data: Rated Power Primary voltage Secondary...
A three-phase Yy0 connected transformer has a nominal rating of 250 kVA and a voltage ratio...
A three-phase Yy0 connected transformer has a nominal rating of 250 kVA and a voltage ratio 15:0.4 kV. After conducting the short-circuit test, where the secondary winding is short-circuited, it is found that the primary series resistance is 0.08 pu and the primary series impedance magnitude is 0.1pu. The effect of the parallel branch in the transformer’s equivalent circuit may be neglected. Explain what information ‘Yy0’ gives about the transformer. Draw the per-phase equivalent circuit of the transformer during the...
Question I The rating of a three phase three winding transformer are: Y-connected 10 KV 40 MVA Secondary Y-connecte...
Question I The rating of a three phase three winding transformer are: Y-connected 10 KV 40 MVA Secondary Y-connected 22 KV 40 MVA A-connected 4 KV 15 MVA Primary Tertiary Neglecting winding resistance and exciting current, the per unit leakage reactance are: Mps 9.6 % pu on 40 MVA, 11022 KV xm = 7.2 % pu on 40 MVA, I 10/ 4 KV Xsti: 12 % pu on 40 MVA, 22/ 4 KV Determine the era nyimpedances of the transformer...
three-phase transformer is rated at 12 kV/135 kV, 100 MVA. It has the following equivalent circuit...
three-phase transformer is rated at 12 kV/135 kV, 100 MVA. It has the following equivalent circuit parameters (referred to the primary winding where appropriate) : • primary resistance R1 = 0.03 ohms, secondary resistance R2’ = 0.04 ohms • primary leakage reactance X1 = 0.1 ohms, secondary leakage reactance X2’ = 0.1 ohms • magnetising reactance XM = 16 ohms, core-loss resistance RC = 200 ohms. In your calculations, you should use the simplified equivalent circuit. i) The transformer is...
QUESTION 3 A 200 - MVA, 15/200 kV single-phase power transformer has a per – unit...
QUESTION 3 A 200 - MVA, 15/200 kV single-phase power transformer has a per – unit resistance of 1.2 percent and a per-unit reactance of 5 percent (data taken from the transformer's nameplate). The magnetizing impedance is impedance is j80 per unit. a. Find the equivalent circuit referred to the low-voltage side of this transformer. b. Calculate the voltage regulation of this transformer for a full-load current at power factor of 0.8 lagging. c. Assume that the primary voltage of...
Solution of two part please with steps Question 1: Ve-le The rating of s three phase...
Solution of two part please with steps
Question 1: Ve-le The rating of s three phase three winding transformer are: Y-connected un KV 40 MVA Y-connected 22 KV 40 MVA 4 KV 15 MVA Primary Secondary Tertiary A-connected Neglecting winding resistance and exciting current, the per unit leakage reactance are X 9.6 % pu on 40 MVA. 110/22 KV X7.2 % pu on 40 MVA, 110/ 4 KV Xg 12 % pu on 40 MVA, 22 4 KV a) Determine...
A power transformer has rated power of 100 KVA and rated primary voltage of 22 KV....
A power transformer has rated power of 100 KVA and rated primary voltage of 22 KV. The series impedance is given as 1 + 15% pu. Find the series impedance in ohms.
Problem #2: A three-phase synchronous generator is rated 16 kV and 200 MVA, has negligible losses...
Problem #2: A three-phase synchronous generator is rated 16 kV and 200 MVA, has negligible losses and has reactance of 1.65 pu. The generator is operated on an infinite bus of 15 kV voltage and delivers 100 MVA at 0.8 Power Factor, lagging. a)Determine the internal voltage (E_i), the power angle (5), and the line current of the machine. b)If the field current of the machine is reduced by 10%, while the mechanical power input to the machine is maintained...
A three-phase Y-A transformer is rated 225-kV:24-kV, 400 MVA and has a single-phase equivalent series reactance...
A three-phase Y-A transformer is rated 225-kV:24-kV, 400 MVA and has a single-phase equivalent series reactance of 6.08 ? as referred to its high-voltage terminals. The transformer is supplying a load of 375 MVA at 0.89 power factor leading at a voltage of 24 kV (line to line) on its low-voltage side. It is supplied from a feeder whose impedance is 0.17 +/2.2 ? connected to its high-voltage terminals. For these conditions, calculate (a) the line-to-line voltage at the high-...
With steps and explain please IO AS CA I PL frx-9 991ES URR 16 DATU Question...
With steps and explain please
IO AS CA I PL frx-9 991ES URR 16 DATU Question 1: The rating of a three phase three winding transformer are: Ve- llo se 4o Primary Secondary Y-connected 10 KV 40 MVA Y-connected 22 KV 40 MVA A-connected Tertiary 4 KV 15 MVA Neglecting winding resistance and exciting Xps= 9.6 % pu on 40 MVA, 110/22 KV Xpt 7.2 % pu on 40 MVA, 110/ 4 KV Xst 12 % pu on 40 MVA,...
Problem 4 Three ideal single-phase transformers are connected in a delta/wye configuration with the primary side of the...
Problem 4 Three ideal single-phase transformers are connected in a delta/wye configuration with the primary side of the three-phase transformer rated at 120 kV and the secondary side rated at 13.8 kV. The rated power of the transformer bank is 20 MVA. One side of the transformer bank is connected to a 120 kV transmission line, and the other side is connected to a three-phase load of 15 MVA at 0.85 lagging power factor. Compute the following: a) The turns...
Question I The rating of a three phase three winding transformer are: Y-connected 10 KV 40 MVA Secondary Y-connected 22 KV 40 MVA A-connected 4 KV 15 MVA Primary Tertiary Neglecting winding resistance and exciting current, the per unit leakage reactance are: Mps 9.6 % pu on 40 MVA, 11022 KV xm = 7.2 % pu on 40 MVA, I 10/ 4 KV Xsti: 12 % pu on 40 MVA, 22/ 4 KV Determine the era nyimpedances of the transformer...
QUESTION 3 A 200 - MVA, 15/200 kV single-phase power transformer has a per – unit resistance of 1.2 percent and a per-unit reactance of 5 percent (data taken from the transformer's nameplate). The magnetizing impedance is impedance is j80 per unit. a. Find the equivalent circuit referred to the low-voltage side of this transformer. b. Calculate the voltage regulation of this transformer for a full-load current at power factor of 0.8 lagging. c. Assume that the primary voltage of...
Solution of two part please with steps
Question 1: Ve-le The rating of s three phase three winding transformer are: Y-connected un KV 40 MVA Y-connected 22 KV 40 MVA 4 KV 15 MVA Primary Secondary Tertiary A-connected Neglecting winding resistance and exciting current, the per unit leakage reactance are X 9.6 % pu on 40 MVA. 110/22 KV X7.2 % pu on 40 MVA, 110/ 4 KV Xg 12 % pu on 40 MVA, 22 4 KV a) Determine...
Problem #2: A three-phase synchronous generator is rated 16 kV and 200 MVA, has negligible losses and has reactance of 1.65 pu. The generator is operated on an infinite bus of 15 kV voltage and delivers 100 MVA at 0.8 Power Factor, lagging. a)Determine the internal voltage (E_i), the power angle (5), and the line current of the machine. b)If the field current of the machine is reduced by 10%, while the mechanical power input to the machine is maintained...
A three-phase Y-A transformer is rated 225-kV:24-kV, 400 MVA and has a single-phase equivalent series reactance of 6.08 ? as referred to its high-voltage terminals. The transformer is supplying a load of 375 MVA at 0.89 power factor leading at a voltage of 24 kV (line to line) on its low-voltage side. It is supplied from a feeder whose impedance is 0.17 +/2.2 ? connected to its high-voltage terminals. For these conditions, calculate (a) the line-to-line voltage at the high-...
With steps and explain please
IO AS CA I PL frx-9 991ES URR 16 DATU Question 1: The rating of a three phase three winding transformer are: Ve- llo se 4o Primary Secondary Y-connected 10 KV 40 MVA Y-connected 22 KV 40 MVA A-connected Tertiary 4 KV 15 MVA Neglecting winding resistance and exciting Xps= 9.6 % pu on 40 MVA, 110/22 KV Xpt 7.2 % pu on 40 MVA, 110/ 4 KV Xst 12 % pu on 40 MVA,...
Problem 4 Three ideal single-phase transformers are connected in a delta/wye configuration with the primary side of the three-phase transformer rated at 120 kV and the secondary side rated at 13.8 kV. The rated power of the transformer bank is 20 MVA. One side of the transformer bank is connected to a 120 kV transmission line, and the other side is connected to a three-phase load of 15 MVA at 0.85 lagging power factor. Compute the following: a) The turns...
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