2 12 14 32 20 13 d 30. For the circuit above, calculate I1 (Disregard I4 in the diagram) а. 1А 31. For the circuit above, calculate I2 (Disregard I4 in the diagram) а. 2A 32. For the circuit above, calculate I3 (Disregard I4 in the diagram) а. 1A 33. What is the voltage at node a a. 8V 34. What is the voltage at node c b. -1A с. 4A d. -4A b. -1A с. 4A d. -4A b. -1A с. 2А d. 4A b. 10 V c. 20V d. 32V a. 8V b. 10 V c. 20V d. 32V

2 12 14 32 20 13 d 30. For the circuit above, calculate I1 (Disregard I4 in the diagram) а. 1А 31. For the circuit above, calculate I2 (Disregard I4 in the diagram) а. 2A 32. For the circuit above, calculate I3 (Disregard I4 in the diagram) а. 1A 33. What is the voltage at node a a. 8V 34. What is the voltage at node c b. -1A с. 4A d. -4A b. -1A с. 4A d. -4A b. -1A с. 2А d. 4A b. 10 V c. 20V d. 32V a. 8V b. 10 V c. 20V d. 32V

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.60P: PowerWorid Simulator case Problem 3_60 duplicates Example 3.13 except that a resistance term of 0.06...

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Line impedances for the power system shown in Figure 1 are Z12 = Z23 = 3.0 + j40.0 Ω, and Z24 = 6.0 + j80.0 Ω. Reach for the zone 3 B12 impedance relays is set for 100% of line 1–2 plus 120% of line 2–4. (a) For a bolted three-phase fault at bus 4, show that the apparent primary impedance “seen” by the B12 relays is Zapparent = Z12 + Z24 + (I32/I12)Z24 where (I32/I12) is the line 2–3 to line 1–2 fault current ratio. (b) If |I32/I12| > 0.20, does the B12 relay see the fault at bus 4?
The single line diagram of a power system is shown below. Load represented as impedance, (13.2) kV voltage It draws 60 MVA power from the system when it is below and (0.9) back power factor. Generators and transformers The related electrical parameters are given below. According to this; a) Calculate all impedances in this given circuit in pu and draw the equivalent impedance diagram of the circuit. (Select the base values as 100 MVA and 13.8 kV.) b) Since the voltage values of the generators are given as E1=1.1∟0° pu and E2=1.25∟10° pu, Calculate the value of the voltage (V1).
PowerWorid Simulator case Problem 3_60 duplicates Example 3.13 except that a resistance term of 0.06 per unit has been added to the transformer and 0.05 per unit to the transmission line. Since the system is no longer lossless, a field showing the real power losses has also been added to the oneline. With the LTC tap fixed at 1.05, plot the real power losses as the phase shift angle is varied from 10 to +10 degrees. What value of phase shift minimizes the system losses?
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Incoming and outgoing lines in a substation are connected to a Busbar. Select one: True False
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