Obtain the per unit impedance and reactance diagram of the power system shown in Figure.1 G1 : 30MVA, 10.5KV, X” = 1.6 Ω G2 : 15MVA, 6.6KV, X” = 1.2 Ω G3 : 25MVA, 6.6KV, X” = 0.56 Ω T1 (Three Phase) : 15MVA, 33/11 KV, X=15.2 Ω per phase on high tension side. T2 (Three Phase) : 15MVA, 33/6.2 KV, X=16 Ω per phase on high tension side. Transmission line = 20.5 Ω / phase Load A = 15 MW, 11 KV, 0.9 p.f lagging Load B = 6.2 KV, 34MW+J20.07MVAR Figure.1
Obtain the per unit impedance and reactance diagram of the power system shown in Figure.1 G1...
G 3. Draw the reactance diagram for the power system shown in Figure.3. The ratings of generator, motor and transformers are given below. Neglect resistance and use a base of 50 MVA, 138 kV in the 40 Ohms Line :20MVA, 18 kV, X = 20% :20MVA, 18 kV, X = 20% Synchronous Motor: 30MVA 13.8Kv X = 20% 3-phase, Star-Star Transformer: 20 MVA, 138/20 kV, X= 10% 3-phase, Star-Delta Transformer: 20 MVA, 138/20 kV, X = 10% G2 y j4012...
3) The single-line diagram of a three-phase power system is shown in Fig. 1. Equipment ratings are given as follows: G1 1,000 MVA, 15.0 kV, 20.18, o 0.07 pu G2 : 1,000 MVA. 15.0 kV, 攻=エ1 =エ2 = 0.20, ro = 0.10 pu G3 : 500 MVA, 13.8 kV. 1" = 띠 z2 = 0.15, zo 0.05 pu G4 : 750 MVA, 13.8 kV. ェd =ェ1 = 0.30, T2 = 0.40 ro = 0.10 pu Ti : 1,000 MVA. 15.0Δ/765Y...
Four-bus power system shown in Fig. 1 are as follows: Generator G1: 200 MVA, 7.2 kv, X -0.15 p.u Generator G2: 250 MVA, 9.6 kV, X-0.12 p.u Generator G3: 500 MVA, 10 kV, X-0.25 p.u Transformer T1:200 MVA, 7.2 Δ /132 Y kV, X= 0.05 p.u Transformer T2: 250 MVA, 9.6 Δ /132 Y kV, X =0.15 p.u Transformer T3: 500 MVA, 10 Δ /132 Y kV, x-0.1 p.u Each 132-kV line:X,-10 Ω 1- A three-phase short circuit occurs at...
The reactance data for the power system shown in figure 10.30 in per unit on a common base is as follows: *************Remember calculations are needed at bus 2 **************** 10.15. The reactance data for the power system shown in Figure 10.30 in per unit on a common base is as follows Item X1 G1 0.10 0.10 0.05 G2 0.10 0.10 0.05 T, 0.25 0.25 0.25 T 0.25 0.25 0.25 Line 1-2 0.30 0.30 0.50 Ti 1 3 2 FIGURE 10.30...
Consider the single-line diagram of the three-phase power system shown in Figure 1. Component ratings are as follows: Generator G1: 750 MVA, 18 kV, X0.2 per unit Generator G2: 750 MVA, 18 kV, X 0.2 per unit Synchronous Motor M: 1,500 MVA, 20 kV, X-20% A-Y Transformers Ti, T2, T's, & T.: 750 MVA, 500 kV Y/20 kV A, X = 10% Y-Y Transformer T's 1,500 MVA, 500 kV Y/20 kV Y, X-10% ne L:X (a) Using bases of 100...
PROBLEM 5 (20 pts]: Draw an impedance diagram for the electric power system given in the Figure 4 showing all impedances in per unit on a 100MVA base. Choose 20/200 kV as the voltage base. If there is a three-phase to ground solid fault at the load bus, what will be fault current taken from generator 1. The three-phase power and line-line ratings are given below. Gl: 90 MVA, 20 kV, X = 9%; TR1: 80 MVA, 20/200 kV, X...
Per unit calculation QUESTION 5 a) Define the Per Unit system and list three (3) main reasons of using Per Unit systemm. (5 marks) b) A three-bus power with two generator system is shown in figure Q2 (b). The 3-phase power and line-line voltage ratings are given below Ti T2 J40 2 Gi G2 j25 Ω 25 Ω Ty Figure Q2 (b) GI: 750 MVA, 18 kV, X 7% G2: 750 MVA, 18 kV, X-15% Motor: 1500 MVA, 20 kV,...
Draw the reactance diagram for the power system shown in Fig. 1 on a 1200 MVA base and 26 kV base at G4 If each motor is operating at its rated current and voltage and 0.9 power factor lagging, find the voltage at bus C. Component Ratin 500 MVA, 22 kV 600 MVA, 23 kV 1200 MVA, 24 kV/500 kV 1500 MVA, 500 kV/13.8 kV Each: 400 MVA, 13.8 kV 700 MVA, 26 kV Three single-phase transformers, each 250 MVA,...
Please show me step by step how to get load impedance in per-unit. New load is 1.05+1.4j per unit and new z load is 0.447 per unit Consider the three-phase power system in the figure below. 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. Lines 1 and 2 have series reactances of 48.4 and 65.43 2, respectively. At bus 4,...
The ratings of the components shown in the one-line diagram are G1: 25 MVA, 13.8 kV, x-0.15 pu G2:15MVA, 13 kV, x = 0.1 5 pu. TI : 25 MVA, 13.2/69 kV, x-0. I 1 pu T2: 25 MVA, 69/13.2 kV,x-0.220 pu Transmission line: j65 ohms/pha bus 2 BE 165Ω ISMVA e ratings of generator 1 as base valu 25MVA 13.8 kV 1 5% 69113.2 kV13kV 1 1% 13.2169k 1 1% 1- Draw the reactance diagram. 2- Find the Y-bus...