Assume that a primary feeder length L-8Km has a constant K = 0.008 (%VD/KVA.mil) and that a load 100KW with power factor PF=0.8 has an increasing density along this feeder (take 1mile = 1.6km). The percentage voltage drop %VD in this feeder will be Select one: Oa 5333% Ob. None of these Oc 4333% Od. 3333%

Assume that a primary feeder length L-8Km has a constant K = 0.008 (%VD/KVA.mil) and that a load 100KW with power factor PF=0.8 has an increasing density along this feeder (take 1mile = 1.6km). The percentage voltage drop %VD in this feeder will be Select one: Oa 5333% Ob. None of these Oc 4333% Od. 3333%

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

Chapter14: Power Distribution

Section: Chapter Questions

Problem 14.19P

See similar textbooks

Similar questions

What is the maximum length in km for a 3 phase T.L having copper conductor of 0.775 cm2 crass section over which 200 KW at unity power factor and at 3300 V are to be delivered, the efficiency if T.L is 90%, take specific resistance as 1.725 μΩ cm
A 3-ph, double circuit O.H.T.L, 420 kV, 350 km, 50 Hz has a configuration as shown in the figure below where each phase in the double circuit has a double bundle with a spacing of 24 cm between the two conductors in the bundle Each conductor in the bundle has a diameter of 0.115 ft and a geometric mean radius (Ds = 1.7 cm). Calculate: [10] 1- Inductance per phase per km and total inductive reactance of this T.L. 2- Capacitance per phase per km and total capacitive reactance of this T.L. 3- Total charging current. 4- Total MVAR generated by the capacitive effect. 5- This T.L. is required to supply 260MVA at 0.85 lag P.f. at 420 kV, assuming that this load is divided equally between these two circuits, find the voltage drop across this T.L (ignore capacitive effect in the calculation).
Since R1=18.10Kohm, R2=67.58Kohm, RC= 1.08Kohm, RE= 3.23Kohm, VCC=14.00V, Beta=241.00 in the circuit given in the figure, calculate the IC current by doing a complete analysis. When performing your operations, 2 steps will be taken after the point. choose the closest one from the stylish ones according to the +/-10% margin of error. There is only 1 correct answer to the question.
A 110 kV, three-phase, 50 Hz, 150 km long overhead line consists of three 1.8 cm diameter stranded copper conductors spaced in 2.5 m delta arrangement. Assume surface irregularity factor m = 0.89 (roughness factor), m for local corona = 0.74 and m for general corona is 0.84. Determine the following at 290° C and barometric pressure of 76 cm Hg. (i) Disruptive voltage (ii) Visual corona voltage for local corona (iii) Visual corona voltage for general corona (iv) Power loss due to corona under fair weather and in wet conditions
Each line of a 3-phase system given in figure is suspended by a string of 5 identical disks and the ratio of C1/C=0.1 (Shunt capacitance per self-capacitance) is given. If the string is connected to line of voltage 33kV. a) What is the voltage distribution over the unit of string and what is the string efficiency? b) When the string is supplied by a Guard Ring and this lead to add a two air capacitance of value 0.2C, 0.1C respectively to the nearest to the conductor. Find the new voltage distribution and the new efficiency.
• 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?
(b) A 3-phase, 50 Hz, 132 kV overhead line of length 150 km has conductors placed in ahorizontal plane. The diameter of the conductors is 20 mm and assume completetransposition arrangement is applied. (i) Analyse the charging current per phase when the conductors spacing are set at 4 m (ii) Investigate the range of conductor spacing that should be chosen in order to reducethe magnitude of the charging current per phase in Q2 (b)(i) by 5% or more.
A lossy capacitor Cx, rated for operation of 5 kV, 50 Hz is represented by an equivalent circuit with an ideal capacitor Cp in parallel with a resistor Rp. Cp is 0.102 microF and Rp=1.25 Mohm. The power loss, and loss tangent of this lossy capacitor at rated voltage respectively ?
If the Reactance of the cylindrical rotor machine connected to an infinite bus bar is double that of the external reactance of 0.5.p.u. If the power angle is 35°, real power output is 0.8, compute the excitation voltage, and for the same power output, if the load angle is reduced by 10 degrees, find the external reactance to achieve this.
he node (busbar) and branch (line) data of a power system are provided in Table Q1.1 and Table Q1.2 respectively. All values in the tables are stated in per unit (p.u.). Using node 1 (busbar 1) as the reference (slack bus), calculate the line flows using the DC power flow method.
a)We have a two-wire overhead transmission line, powered by a constant voltage source of 700 V. The values for the inductance of the conductors are 2.348x10-3 H/km and the capacitance values are 6.325x10-9 F/km. Assuming an ideal (no loss) line and its length at 130 km, determine the natural impedance of the line. b) What is the transient phenomenon in a transmission line? As an example of its causes.
A 210 km long three-phase transmission line is operated on a 60 Hz network. Line Finally a 40 MVA power with 0.78 back power factor under 120 kV voltage is being shot. The conductor resistance value of the line is 0.10 Ω / km, the inductance value Since 1.30 mH / km and capacitance value is 0.001 µF / km, Medium Transmission Line establishing the equivalent circuit model; a) -Calculate the line current and voltage of the sending side. b) Calculate the power loss on the line. c) Calculate the% voltage regulation value of the line.