The average real power delivered to the load impedance ZL = 30 Q in the two port network shown below is .W: (The voltage given is in RMS) 20 Ω I2 + Z11 = 40 2 Z12 = 60 Q + 50/0° V V2 V1 Z21 = 80 Z22 = 100 2 %3D 60 О 53.33 45.45 16.67 25 None of the above
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- a) You have been employed as an electrical engineer by a power transmission company to design a short transmission line to supply power to a light-industrial load consumer with power system specification as follows, a 3-ph, 60Hz overhead short transmission line with a line-to-line voltage of 23KV at the load end, line impedance of 2.48 ±j6.57Ω/phase, the industry has a cumulative consumption of 9MW with a power factor of 0.85 of lagging as a result of several induction motor on its production lines.As part of the regulations for connections to the grid, you are to provide justifications and values to the Energy Commission of Ghana.(i) What would be value of the voltage between the live conductor and the neutral, between live and live voltages at the industrial premises of the factory?(ii) What load angle would expect the factory to be operating at?A transmission line delivers 1200MW at 500kV and 85% power factor. The series impedance of the line is 0.42 + j0.65 ohms/mi and the shunt impedance to.neutral is -j0.12 x 10^6 ohms-mi. What is the velocity propagation of the line. A. 560 × 10^6 km/hr B. 890 × 10^6 km/hr C. 750 × 10^6 km/hr D. 510 × 10^6 km/hrIn the case of reactive power compensation in a low voltage distribution network and increasing the power factor to cosQ2 = 0.92 as a result of compensation while cosQ1 = 0.75, which of the following expresses the change in apparent power transmitted from the line a) increase by 22.66% b) decrease by 22.66% c) increase by 18.47% d) increase by 15.00% e) decrease by 18.47%
- Find the maximum real power that can be transferred to an impedance ZL connected between terminals a and b given that: R1 = 9Ω, R2 = 3Ω, C1 = 37µF, A = 3, Vs = 102v and w = 52 rads/secLet a series RLC network be connected to a source voltage V, drawing a current I. (a) In terms of the load impedance Z = Z angleZ, find expressions for P and Q, from complex power considerations.(b) Express p(t) in terms of P and Q, by choosing i(t)= sqrt2*I* cos wt.(c) For the case of Z = R + jwL + 1 /jwC, interpret the result of part (b) in terms of P, QL, and QC. In particular, if w^2*LC=1, when the inductive and capacitive reactances cancel, comment on what happens.In the network, find the value of ZL for maximum power transfer. The load impedance has both variable resistance and variable reactance. In addition, calculate the maximum power dissipated under these conditions, PS: Show complete/step-by-step solution without rounding off any numbers.
- S1) The serial impedance per unit length of a three-phase 140 km power transmission line is 0.09 + j0.88 ohm/ km and its admittance is j4.1x10-6 S / km. Power factor under 210 kV interphase voltage from the end of this energy transmission line A power of 150 MVA, which is 0.85 back, is drawn. Using this transmission line data and the T equivalent circuit model, the line Calculate the head voltage (V1), current (I1) and load angle.A ower system is operating at 1000Mw, 132kV, 50Hz, with 0.8 p.f. laging in parallelwith another line at 750OMW, 132kV, 50Hz with 0.707 p.f. lagging. Both are interconnectedat the station and when the compensating device is on, the overall power factor isimproved to 0.9 lagging. Suggest suitable capacitors, shunt and series. Individual loadsand combined load are to improve power factor to 0.9 in all cases.Find the following: the power drawn by the 100ohm variable resistor If the variable resistor is set to 200-ohms, instead of 100-ohms, What is the power drawn by the 200-ohms resistor? total current of the system Is the circuit inductive, capacitive, or neither (resistive)? NOTE: Polar form for Voltage & Current. Rectangular form for Impedance
- A power system has 2 buses with bus1 as slack bus and bus 2 as PQ bus and bus voltages as V1=20 and V2=20. The admittances are Y11=Y22=492, Y12=Y21=181. Find the real and reactive power in the slack bus. Real Power = Reactive Power =If the values of real power and reactive power is specified for a bus, then it is called as PQ bus. Select one: True FalseExercise 1: A three-phase 3Φ transmission line has an impedance of 0.62+j35.06Ω/phase and supplies a three-phase load of 100MW with a power factor (fp) of 0.8 lagging at 200kV. Taking 100MVA and 215kV as a base, we ask: d-) Calculate the complex power consumed by the load in p.u;e-) Calculate the voltage at the emitter terminal in p.u;f-) Calculate the LT impedance taking 200MVA and 150kV as a new base. PLEASE, TYPE, HAND WRITING GETS UNDERSTANDING.