please very quickly For the power system its one line diagram is shown below:1-Draw the reactance diagram for power system. Markallreactances in per unit using a base of200 MVA, 400 kV in the transmission line (TL1).The ratings of the generators, motors, transformers are:Three Phase Y-YTransformers: 200 MVA, 400Y/18Y kV, X=j0.0X pu where X-Three Phase Y-A Transformers: 400 MVA, 400A / 16Y kV, X=10%.:200 MVA, 18 kV, X" = 20%: 80 MVA, 13.4kV, X" = 20%: 60MW, 0.80 Lag. P.f.Generator 1, 2Synch. MotorLoad 3The inductive reactance of the transmission lines are as follows:TL1, TL2 = j40 QTL3 = j30 QTL4 = j30 Q.2-If the voltage ofbus 3 is 13.4 kV when the motor draws 60 MW at 0.80 leading P.f., Calculatethe voltages at the points A, B assuming that the two generators divide the load equally.Bus 1Bus 2AT2-TL1.BTL2TL3TL4Bus 3Load 3

Answered: Image /qna-images/answer/ec6da474-df3f-4a9e-a663-80fc255185e2.jpg

For the power system its one line diagram is shown below: 1-Draw the reactance diagram for power system. Markallreactances in per unit using a base of 200 MVA, 400 kV in the transmission line (TL1). The ratings of the generators, motors, transformers are: Three Phase Y-YTransformers: 200 MVA, 400Y/18Y kV, X=j0.0X pu where X- Three Phase Y-A Transformers: 400 MVA, 400A /16Y kV, X=10%. Generator 1,2 : 200 MVA, 18 kV, X" =20% Synch. Motor : 80 MVA, 13.4kV, X" =20% : 60MW, 0.80 Lag. P.f. Load 3 The inductive reactance of the transmission lines are as follows: TL1, TL2 = j40 Q TL3 = j30 Q TL4 = j30 Q. 2-If the voltage ofbus 3 is 13.4 kV when the motor draws 60 MW at 0.80 leading P.f., Calculate the voltages at the points A, B assuming that the two generators divide the load equally. Bus 1 Bus 2 A B -TL1 TL2 TL4 Bus 3 Load 3

For the power system its one line diagram is shown below: 1-Draw the reactance diagram for power system. Markallreactances in per unit using a base of 200 MVA, 400 kV in the transmission line (TL1). The ratings of the generators, motors, transformers are: Three Phase Y-YTransformers: 200 MVA, 400Y/18Y kV, X=j0.0X pu where X- Three Phase Y-A Transformers: 400 MVA, 400A /16Y kV, X=10%. Generator 1,2 : 200 MVA, 18 kV, X" =20% Synch. Motor : 80 MVA, 13.4kV, X" =20% : 60MW, 0.80 Lag. P.f. Load 3 The inductive reactance of the transmission lines are as follows: TL1, TL2 = j40 Q TL3 = j30 Q TL4 = j30 Q. 2-If the voltage ofbus 3 is 13.4 kV when the motor draws 60 MW at 0.80 leading P.f., Calculate the voltages at the points A, B assuming that the two generators divide the load equally. Bus 1 Bus 2 A B -TL1 TL2 TL4 Bus 3 Load 3

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 3.45P: Figure 3.39 shows a oneline diagram of a system in which the three-phase generator is rated 300 MVA,...

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Consider the single-line diagram of the power system shown in Figure 3.38. Equipment ratings are Generator 1: 1000MVA,18kV,X=0.2perunit Generator 2: 1000MVA,18kV,X=0.2p.u. Synchronous motor 3: 1500MVA,20kV,X=0.2p.u. Three-phase -Y transformers T1,T2,T3,T4,: 1000MVA,500kV,Y/20kV,X=0.1p.u. Three-phase YY transformer T5: 1500MVA,500kV,Y/20kVY,X=0.1p.u. Neglecting resistance, transformer phase shift, and magnetizing reactance, draw the equivalent reactance diagram. Use a base of 100 MA and 500 kV for the 50-ohm line. Determine the per-unit reactances.
Consider the single-Line diagram of a power system shown in Figure 3.42 with equipment ratings given: Generator G1: 50MVA,13.2kV,x=0.15p.u. Generator G2: 20MVA,13.8kV,x=0.15p.u. Three-phase -Y transformer T1: 80MVA,13.2/165YkV,X=0.1p.u. Three-phase Y- transformer T2: 40MVA,165Y/13.8kV,X=0.1p.u. Load: 40MVA,0.8PFlagging,operatingat150kV Choose a base of 100 MVA for the system and 132-kV base in the transmission-line circuit. Let the load be modeled as a parallel combination of resistance and inductance. Neglect transformer phase shifts. Draw a per-phase equivalent circuit of the system showing all impedances in per unit.
With generator conyention, where the current leaves the positive terminal of the circuit element, if P is positive then positive real power is delivered. (a) False (b) True
A Y-connected load bank with a three-phase rating of 500 kVA and 2300 V consists of three identical resistors of 10.58. The load bank has the following applied voltages: Vab=184082.8,Vbc=276041.4, and Vca=2300180V. Determine the symmetrical components of (a) the line-to-line voltages Vab0,Vab1, and Vab2, (b) the line-to-neutral voltages and Van0,Van1, and Van2, (c) and the line currents Ia0,Ia1, and Ia2. (Note that the absence of a neutral connection means that zero-sequence currents are not present.)
Determine the bus admittance matrix (Ybus) for the three-phase power system shown in Figure 6.23 with input data given in Table 6.11 and partial results in Table 6.12. Assume a three-phase 100 MVA per unit base. TABLE 6.11 Bus input data for Problem 6.20 TABLE 6.12 Partially Completed Bus Admittance Matrix (Ybus) for Problem 6.30
Figure 3.32 shows the oneline diagram of a three-phase power system. By selecting a common base of 100 MVA and 22 kV on the generator side, draw an impedance diagram showing all impedances including the load impedance in per-unit. The data are given a follows: G:90MVA22kVx=0.18perunitT1:50MVA22/220kVx=0.10perunitT2:40MVA220/11kVx=0.06perunitT3:40MVA22/110kVx=0.064perunitT4:40MVA110/11kVx=0.08perunitM:66.5MVA10.45kVx=0.185perunit Lines I and 2 have series reactances of 48.4 and 65.43, respectively. At bus 4, the three-phase load absorbs 57 MVA at 10.45 kV and 0.6 power factor lagging.
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?
Three single-phase two-winding transformers, each rated 25MVA,34.5/13.8kV, are connected to form a three-phase bank. Balanced positive-suence voltages are applied to the high-voltage terminals, and a balanced, resistive Y load connected to the low-voltage terminals absorbs 75 MW at 13.8 kV. If one of the single-phase transformers is removed (resulting in an open connection) and the balanced load is simultaneously reduced to 43.3 MW (57.7 of the original value), determine (a) the load voltages Va,Vb, and Vc; (b) load currents Ia,Ib, and Ic; and (c) the MVA supplied by each of the remaining two transformers. Are balanced voltages still applied to the load? Is the open transformer overloaded?
Figure 3.39 shows a oneline diagram of a system in which the three-phase generator is rated 300 MVA, 20 kV with a subtransient reactance of 0.2 per unit and with its neutral grounded through a 0.4- reactor. The transmission line is 64km long with a cries reactance of 0.5-/km. The three-phase transformer T1 is rated 350MVA.230/20kV with a leakage reactance of 0.1 per unit. Transformer T2 is composed of three single-phase transformers, each rated 100 MVA, 127/13.2kV with a leakage reactance of 0.1 per unit. Two 13.2kV motors M1 and M2 with a subtransient reactance of 0.2 per unit for each motor represent the load. M1 has a rated input of 200 MVA with its neutral grounded through a 0.4- current-limiting reactor, M2 has a rated input of 100 MVA with its neutral not connected to ground. Neglect phase shifts associated with the transformers. Choose the generator rating as base in the generator circuit and draw the positive-sequence reactance diagram showing all reactances in per unit.
For the power system in Problem 3.41, the synchronous motor absorbs 1500 MW at 0.8 power factor leading with the bus 3 voltage at 18 kV. Determine the bus I and bus 2 voltages in kV Assume that generators I and 2 deliver equal real powers and equal reactive powers. Also assume a balanced three-phase system with positive-sequence sources.
In a balanced three-phase Y-connected system with a positive-sequence source, the line-to-line voltages are 3 times the line-to-neutral voltages and lend by 30. (a) True (b) False
Refer to the 5-bus data given below. Sbase = 400 MVA, the base voltage is 15.0 kV for buses 1 and 3, and 345 kV for buses 2, 4, 5. Note that 1-5 and 3-4 are 15/345 kV transformers.a) Draw a one-line diagram of the power system.b) Find the elements Y23, Y43, Y11 Y33 of the system bus admittance matrix.