Consider the below circuit with Vs (t) = 220 cos (100t) Vrms, R=1002, L=0.2H. Find: 1. The Complex, 2. The Average, 3. The Reactive, 4. And apparent power absorbed by the load.
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- A 3 phase 170KV, 50 HZ transmission system is 170km long. The resistance is 0.5Ω/km/phase, inductance of 1mH/km/phase and capacitance of 2nano farad/km/phase. The line delivers 60MW and 93MVAR at 170KV line to line voltage. Using suitable mode determine sending and receiving end currents. What can you infer from the result?The particulars of the series compensated transmission line in figure shown below are V=220V, f=60 Hz, X=15Ω, and δ=60º. The degree of inductive compensation is r=30%. Find (a) the line current I, (b) the active power PP, and (c) the reactive power QP.If the values of real power and reactive power is specified for a bus, then it is called as PQ bus. Select one: True False
- -) The active and reactive power drawn by the mixer fed from a 230 Vrms, 50 Hz single phase AC network was measured as 600 W and 100 VAR, respectively. According to this information: a) Calculate the apparent power drawn from the network? b) Calculate the current drawn from the network? c) Calculate the cos(a).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?S.2) The serial impedance of the 300 km power transmission line is 23 + j75 ohm / phase and the shunt acceptance is j500 microS / phase. A power of 50 MW with a power factor of 0.88 under 220 kV interphase voltage from the end of the power transmission line being shot. Using these data of the energy transmission line, a) Characteristic impedance of the energy transmission line, b) Natural apparent power of the energy transmission line according to the 220 kV interphase operating voltage, c) The values of the line parameters A, B, C and D of the transmission line using hyperbolic functions, d) Calculate the maximum power that the power transmission line can transmit.
- The sending-end voltage in the circuit seen is adjusted so that the load voltage is always 13,800 V(rms). The variable capacitor is adjusted until the average power dissipated in the line resistance is minimum. 1. a) If the frequency of the sinusoidal source is 60 Hz, what is thevalue of the capacitance in microfarads?2. b) If the capacitor is removed from the circuit, what percentageincrease in the magnitude of Vs is necessary to maintain 13,800V(rms) at the load?3. c) If the capacitor is removed from the circuit, what is thepercentage increase in line loss?If the normalized admittance visible at a distance d from the load impedance is 1 - j5, how many mho should the input admittance of the parallel side line that must be connected to the 50 ohm transmission line at position d be? (mho = 1/ohm)1/In the Transmission Line Simulator, the Transmission Line is connected in Nominal-Pi Circuit. Select one: True False
- a) Find the IBC load currentb) Give the VCA line voltagec) Calculate the total complex power on the transmission line.A three phase, 60 Hz transposed transmission line is arranged horizontally with distances D12 = 5 ft; D23 = 5 ft; D13 = 10 ft. The outside diameter of the conductors is 0.721 inch and with GMR of 0.0243 ft. Determine the capacitance per phase of the line in microfarad per km.Let a series RLC network be connected to a source voltage V, drawing a current I. (a) In terms of the load impedance Z=ZZ, find expressions for P and Q, from complex power considerations. (b) Express p(t) in terms of P and Q, by choosing i(t)=2Icost. (c) For the case of Z=R+jL+1/jC, interpret the result of part (b) in terms of P,QL, and Qc. In particular, if 2LC=1, when the inductive and capacitive reactances cancel, comment on what happens.