1) find Yous and Voltage at various buses. jo.25 pu jo. 25 pu m ·j0.125 pu jo. A pu m jo.2 pu jo.25 pu jo. 2 pu j0.125 pu jo. 25 pu jo. A pu m 3 jo. 1 pu (1 A (1) jo.1 pu 12-90° (1 -jo.% -jo.q (↑ 12-90° j1.15 pu 3j1.15 pu 1.2520° pu 0.85L-45° pu O
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- The per unit impedance of a generator on a 60 MVA, 20 kV base is j0.09 p.u. The per unit impedance to a 100 MVA, 20 kV base will be (a.) j0.054 p.u. (c.) j 1.5 p.u. (b.) j0.54 p.u. (d.) j0.15 p.u.A generator operating at 50 Hz delivers 1 p.u. power to an infinite bus through a transmission circuit in which resistance is ignored. A fault takes place reducing the maximum power transferable to 0.5 p.u. Where as before the fault, this power was 2.5 p.u. and after the clearance of the fault, it is 2 p.u. The value of 8 is maxA 80 MVA synchronous generator has Xs = j8Ω. The generator is supplying itsrated power to an infinite bus at a voltage of 33KV and a power factor of 0.9lagging.Determine the following:a) The generator emf (E) and the power angle.b) The maximum power (Pmax) that the generator can supply and the armaturecurrent (Ia) in this case (i.e. when the power is maximum) and what is thepower factor?
- Fill in the table for a correctly wired duplex outlet (U.S. National Electric Code standards for voltage PARAMETER EQUATION and frequency). Note the used of double- subscript notation. You can assume a 0° phase reference for Vba(t). Vba(t) Vea(t) Vbe(t) Vba (Peak Phasor) Vea (Peak Phasor) Vbc (Peak Phasor) Vba (RMS Phasor) Vea (RMS Phasor) Vbc (RMS Phasor) A CAnswer it i will thumbs up Dont copy paste..1.) Convert the reactance diagram into admittance Diagram.( I mean draw the diagram). 2.) Find the Equation using KCL. 3.) Must show whole solution after finding the equation. Box your Final answer.
- Consider the switching waveforms shown below, operating with a duty-cycle of 30%. Which statements correctly describe the switching circuit, load and circuit operation? (Multiple answers possible, but wrong answers will deduct marks) Voltage across load Voltage (V) 000 120 0000 100 80 60 40 20 30 Time (us) The load must be predominantly resistive. The average current in the load is 1.0A. The RMS current in the load is approximately 1.414A. The load must be predominantly inductive. The resistive part of the load is 200ohms. The average current in the load is 0.6A. O The resistive part of the load is 50ohms. 0 0 10 20 40 50 60 Current (A) 2 5 0.5 0 0 10 Current through load 20 W 30 Time (us) 40 50 60A generation station of 3 MW supply a two region A & B .The load variation of these regions is as follow: Region A (Time) From midnight from 4a.m to From 10a.m to From 5p.m to to 4a.m 10a.m 5p.m 7p.m From 7p.m to midnight Load(kw) 800 500 NO load 300 100 Region B (Time) From From From From From midnight 6a.m to 2p.m to 4p.m to 9p.m to Load(kw) to 6a.m 300 2p.m 4p.m 9p.m midnight 600 No load 800 1100 With neglect transmission line losses. Find the load factor, diversity factor, reserve capacity,plant use factor.A 13.2 kV, 60 Hz, 3-phase synchronous generator is connected in star and its neutral point is earthed while inductance per phase is 0.02 Henry. The generator is connected to a bus bar through a circuit breaker. The distributed capacitance up to circuit breaker between phase and neutral is 0.015 micro Farad. Determine the following: (i) Peak re-striking voltage (in kV) across the contact of circuit breaker; (ii) Frequency of oscillations (in kHz); (iii) Time to occurs first peak re-striking voltage (in micro second) and (iv) The average rate of rise of re-striking voltage (in mega volts per second)
- 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 diagramA 20 Ohm resistor is in series with a 30 Ohm Inductive reactance. If they are connected to a 40 Volt a.c. source, what is the phase angle between the voltage across the Inductive reactance, and the supply voltage (in degrees)? **Only give the magnitude. If you believe the current is lagging OR leading, give a positive value for the angle " I-write legibly-show complete solution