[V1] j0.2 jo.2 j0.2 j0.21 [j0.11 V2 jo. 2 jo.6 j0.2 jo.6 jo.1 V3 jo. 2 jo.2 jo.8 j0.2jo.2 [v4] \jo. 2 jo.6 j0.2 j1.1] [jo.2] The Thevinin impedance seen between bus 2 and bus 3 is: Select one: O a. j0.8 O b.j1 O c. j0.2 O d.j1.1 O e. None of these II
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![[V1]
j0.2 jo.2 jo.2 j0.21 [j0.11
V2
jo. 2 jo.6 j0.2 jo.6 jo.1
V3
jo. 2 jo.2 j0.8 j0.2j0.2
[v4]
\jo. 2 jo.6 j0.2 j1.1] [jo.2]
The Thevinin impedance seen between bus 2 and bus 3 is:
Select one:
O a. j0.8
O b.j1
O c. j0.2
O d.j1.1
O e. None of these](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd99b6acb-3c56-46a2-8aaf-762988209417%2F5cca54dc-ef77-4aed-8c2b-0d278c0b6b55%2F9g6s1yg_processed.jpeg&w=3840&q=75)
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- Shown are two buses connected via a transmission line. Connected to Bus 1 is a generator(modelled as a voltage source V1), and to Bus 2 is a generator( with Voltage V2) and a load. The line impedance Z = R + jX is not known. Three-phase load is forecasted as 100MW + 60MVar. Generator at Bus 2 is scheduled to deliver 40MW and its excitation is adjusted for the machine to deliver 55 MVar. Voltage at Bus 1 is 241 KV angle 10 deg, while voltage at bus is 230 kV; use V2 as the reference for all angles. 1. What is the current (RMS) in amperes drawn by the load connected to Bus 2? 2. How much real power (in MW) is delivered by the generator connected to Bus 1? 3. What is the total real power loss along the line, in percent of the load? 4. What is the X/R Ratio of the line impedance?The annual load duration curve of a power supply system may be considered as straight line from 40 MW to 8 MW. The load factor of the system is ?Figure shows the one-line diagram of a simple three-bus power system with generation at buses 1 and 3. The voltage at bus 1 is V1 is 1.025 at an angle of 0◦ per unit. Voltage magnitude at bus 3 is fixed at 1.03 pu with a real power generation of 300 MW. A load consisting of 400 MW and 200 MVAr is taken from bus 2. Line impedances are marked in per unit on a 100 MVA base. (a) Construct Ybus matrix for the system in Figure (b) Using Gauss-Seidel method and initial estimate of V2(0) = 1.0 + j0 and V3(0) = 1.03 + j0 and keeping |V3| = 1.03 pu, determine the phasor values of V2 and V3. Perform two iterations.
- 5.5 kW, 1450 rpm. L-type equivalent circuit and parameters for a continuous sinusoidal phase of a star connected 3-phase ASM with line voltage 220 V and frequency 50 Hz are given as follows, ignoring core (iron) losses: 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 8.0815 2.6455 4.3763 7.1534 1.2558 6.3414 5.2280 3.7473A surge of 100 kV travels along an overhead line towards its junction with a cable. The surge impedance for the overhead line and cable are 400 ohms and 50 ohms respectively. The magnitude of the surge transmitted through the cable is ?Using a test equipment, Vmax was found to be 5V while Vmin is 1V. The distance between voltage maximas is 14 cm and the first maximum was found to be 7 cm from the load. What is the load impedance if the characteristic impedance of the line is 75 ohms?
- Which termination would result to a phase change of 180 degrees at the load if Zo = 100 ohm? a. 50 ohm b. short circuit c. 75 ohm d. all of these What is the purpose of impedance matching? a. maximum return loss b. maximum SWR c. maximum load power d. maximum reflection A short piece of transmission line that may be open or shorted and used for impedance matching purposes. a. converter b. decoder c. stub d. transformerWhile the instantaneous electric power delivered by a single-phase generator under balanced steady-state conditions is a function of time havi ng two components of a constant and a double-frequency sinusoid, the total instantaneous electric power delivered by a three-phase generator under balanced steady-state conditions is a constant. (a) True (b) FalseWhat are two ways of reducing Z0? (last part of the question)
- Refer to Figure 1. Using its equivalent reactance diagram, what is the total impedance of the system up to the fault point at the end of the receiving line (in per unit)? Below are the parameters: G1 : 9 MVA, 13 kV, j0.11 p.u. G2 : 8 MVA, 13 kV, j0.06 p.u. T1 : 9 MVA, 13/69 kV, j0.042 p.u. TL : 262 km, 0.031 ohm per km, 0.3 ohm per km, operates at 69 Base values are that of G1. Round your answer to 2 decimal places. what is the fault MVA of the system when a three-phase fault occurs at the receiving end?a) How many MVAr of shunt capacitors are required to increase the power factor on a 10 MVA load from 0.85 to 0.9 lagging? b) How many MVAr of shunt capacitors are required to increase the power factor on a 10 MVA load from 0.90- to 0.95 lagging? c) Which requires more reactive power, improving a low power-factor load (case a) or a high power-factor load (case b)?• Zh = 100 ohm • Draw the pu reactance diagram by taking Ut(base) = 132kV, St(base) = 100MVA. If the 33 kV busbar voltage is kept constant at 30 kV and 0.8 inductive 50 MVA power is drawn from this bus, what is the voltage at the synchronous machine ends?