If for example communication power is often normalized by assuming R to be a unity in Ohms, although R may be another value in actual circuit. If the actual value of the power is required, it is worked out by de-normalization of the normalized value. Use the above to determine the instantaneous power, given time interval to be (-4,4) and x = 2 + t2.

If for example communication power is often normalized by assuming R to be a unity in Ohms, although R may be another value in actual circuit. If the actual value of the power is required, it is worked out by de-normalization of the normalized value. Use the above to determine the instantaneous power, given time interval to be (-4,4) and x = 2 + t2.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.10P: For the circuit element of Problem 2.3, calculate (a) the instantaneous power absorbed, (b) the real...

See similar textbooks

Similar questions

For a current of r.m.s. value 15 A, and frequency 5 kHz, write down the standard expression of current. Hence, calculate: (a) the instantaneous value 150 μs after it passes through zero, and (b) the time taken for it to reach 10 A, after passing through zero for the first time.
The area of an interconnected power system has two units operating on economic dispatch. The variable operating costs of these units are given by C =8P +0.009P2 11 1(R/h) and C = 10P + 0.008P2 where P1 and P2 are in MW. The transmission losses for the area are given by ? = 1.5 × 10−4?2 + 2 × 10−5? ? + 3 × 10−5?2 , MW ?1122 2 2 2 (R/h,) Determine the following when the area λ = 16.00 R/MWh: a. The output of each unit b. Total transmission losses c. Total load demand d. Total operating cost
TRUE OR FALSE? On the electric power grid, supply must equal demand at all times, otherwise frequency can swing outside the accepted limit. Storage, transmission, and demand response can help to meet this constraint.
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.
A transmission line has an actual impedance of 18 ohms, compute for the per unit impedance of this line assume Vbase = 2400, Sbase = 100kVA power factor at unity p.f. round answer to 4 decimal places.
Discuss the significance of power factor in power distribution and how power factor correction can improve system efficiency.
A 3-phase, 50 Hz overhead transmission line, 100 km long, 110 kV between the lines at the receiving end has the following constants : Resistance per km per phase = 0·153 W Inductance per km per phase = 1·21 mH Capacitance per km per phase = 0·00958 µF The line supplies a load of 20,000 kW at 0·9 power factor lagging. Calculate using nominal p representation, the sending end voltage, current, power factor, regulation, and the efficiency of the line. Neglect leakage.
(II) If 35 MW of power at 45 kV (rms) arrives at a town froma generator via 4.6Ω transmission lines, calculate (a) theemf at the generator end of the lines, and (b) the fractionof the power generated that is wasted in the lines.
A 30 mile, 3-phase transmission line delivers 8,000 kW at 33 kV, p.f. 0.8 lagging. The resistance and reactance of single conductor are 0.6 ohm and 0.72 ohm respectively per mile. Find the percent efficiency of the line.
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.
S.1) The serial impedance per phase of a three-phase 45 km energy transmission line is 2 + j4 / phase. A load with a power factor of cos2 = 0.8 forward is fed from the end of the line. Since the line voltage at the beginning and end of the line of the energy transmission line is wanted to be kept constant at 115 kV, a) Active and reactive powers drawn from the beginning and end of the line, b) Calculating the power consumed along the energy transmission line and the efficiency of the line. S.2) Line constants of an energy transmission line are given as A = D = 0.8746 + j0, B = 0 + j128.34, C = j0.0018316 S. At the beginning of the line, it is desired to write 1920 MW active power and 600 MVAr reactive power lines under 7650kV line voltage. According to this business, a) Calculate the line end magnitudes (U2, I2 and P2). b) What value does the end voltage take when the load fed from the end of the line is deactivated? S.3) The length of a phased energy transmission line with a…
Explain the integration of renewable energy sources, such as wind and solar, into existing power systems and the challenges associated with their intermittency.