Question 2 Draw the per-unit reactance diagram for the system shown below. Transformers 1 and 3 are identical. Transformers 2 and 4 are identical too. 1) Choose a base of 11 KV, 100 MVA in the generator side. Calculate the current in each transmission line. I 2) Choose a base of 11 KV, 100 MVA in the Motor side. Calculate the current in each transmission line. j25a +3E 11 kv 100 MVA 9% Bet T₁ T₂ Bet Et 11.5/115 kv 60 MVA 8% j182 T₁ = T₂ and Tu toe 11516-640 70 MA 10% T₂ =T4 M 6.6kv 80 MVA 18%

Question 2 Draw the per-unit reactance diagram for the system shown below. Transformers 1 and 3 are identical. Transformers 2 and 4 are identical too. 1) Choose a base of 11 KV, 100 MVA in the generator side. Calculate the current in each transmission line. I 2) Choose a base of 11 KV, 100 MVA in the Motor side. Calculate the current in each transmission line. j25a +3E 11 kv 100 MVA 9% Bet T₁ T₂ Bet Et 11.5/115 kv 60 MVA 8% j182 T₁ = T₂ and Tu toe 11516-640 70 MA 10% T₂ =T4 M 6.6kv 80 MVA 18%

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Calculate new per unit reactance of T2. Generator G: 15 MVA, 13.8 kV, X = 0.15 p.u. %3D Motor M1: 5 MVA, 13.8 kV, X = 0.15 p.u. %3D Motor M2: 5 MVA, 14.4 kV, X = 0.15 p.u. T: 25 MVA, 13.2 - 161 kV, X %3D 0.1 р.u. T;: 15 MVA, 13.8 –. 161 kV, X = 0.1 p.u. Line: j100 N (actual) Select a base of 100 MVA and 161 kV in the transmission line. M) T G Line (M2) 0.67 pu O 6.67 pu О 0.33 pu 0.015 pu cede
Sub:electrical distribution
Subject name: Power System Protection
2.5.3 A three phase power system has two generator connected in parallel to a transformer and subsequently to a 230 kV transmission line. The ratings for the components are given as below: Generator 1:10 MVA, reactance of 12%. Generator 2: 5 MVA, reactance of 8%. Transformer: 15 MVA, reactance of 6% Transmission line: impedance of 4+j60 2, for which the reactances in percentage are based on the ratings of the respective components. Obtain the reactance and impedance values of the components in the system in percentage, based on 15 MVA and rated voltage of the components.
6. In figure below the rating of reactance and various components are shown. A load of 50MW at p.f. lagging is taking from the 33kv substation which is to be maintained at 30kv. Calculate the terminal voltage of the synchronous machine (Vs) in pu, also represent the line and transformer in series reactance. The system is three phase system V6 11 kV 132 kV 132 kV 33 kV 50 MW Line 0.8 p.f. lagging j1000 50 MVA X 10% 50 MVA X 12% 30 kV
There is a three-phase system such that the phase current in the generator, lines and charging phase is the same. The phase voltage in the generator must be 1000 [V] with clockwise sequence. The connected load must be such that the phase current in each load is 10 [A] and its power factor is 0.97 “lagging”. a) Determine phase currents in the generator, lines and phase in the load
In the following power system M ilio YA T₂ L47 YA 5 ΔΥ synchronous generators G₁,G₂ and synchronous motor M all have the same per-unit impedances Xo=0.05, X₁=X₂=0.7 The three transformers T₁, T₂, T3 are identical with X=0.1pu. Finally, the three transmission lines L47, L57, L67 are identical with per-unit impedances X₁=0.2, X₁=X₂=0.1 Pre-fault all voltages are 1 pu. Then the a phase at bus 6 faults to ground (through zero impedance). What is the magnitude of the per-unit fault current? उह 4 7 L 67 L 57 Y
Solve it quickly please
Q3/ For the system shown in figure. The generator is supplying 1.0 pu MW power under prefault condition. When three-phase fault occur at point F. What should the value of fault reactance must be to make the critical clearing angle equal to 58.9. Sc j0.1 j0.1 10.21 BE j0.38 38 j0.21 IEgl-12 pu 10.19 F 10.19 IVI-1.00 pu j0.1 j0.1 Q4/ Figure below shows the one-line diagram
It is bartleybe's policy that if questions objective than you need to solve at least first 3 questions.
If the load draws a current of 2727 A, in phase, from a generator, which of the following statement is true? O A. The reactive power is flowing from generator to the load and the real power is flowing from the load to the generator. O B. Since the current is in phase with the generator voltage, both the real and reactive power is flowing from the generator to the load. O .Since the current is leading the generator, both the real and reactive power is flowing from the load to the generator. O D. The real power is flowing from generator to the load and the reactive power is flowing from the load to the generator. O E. None of the other choices are correct
L-type equivalent circuit and parameters for a continuous sinusoidal phase of a 5.5 kW, 1460 rpm, line voltage 220 V and frequency 50 Hz star-connected 3-phase ASM, ignoring core (iron) losses given as follows: R1=0.21 Ohm, R2=0.18 Ohm, X1=X2=0.66 Ohm and Xm=9.9 Ohm How many times the inrush current will be the rated current when the ASM is started directly? Answer options group 3.7473 5.2280 8.0815 7.1534 1.2558 4.3763 2.6455 6.3414