Example 3.2 A three phase 60HZ completely transposed 345kV, 200km line has two 403mm2 26/2 ACSR conductors per bundle and the following positive sequence line constant: z= 0.032 + j0.35 0/km y= j4.2 x 10-6 S/km Full load at the receiving end of the line is 700MW at 0.99 power factor leading and at 95% of rated voltage. Assuming a medium length line with nominal n line, determine the following: a) ABCD parameters of the nominal circuit b) Sendingend voltage Vs, current Is and real power Ps c) Percent voltage regulation d) Transmission line efficiency at full load

Example 3.2 A three phase 60HZ completely transposed 345kV, 200km line has two 403mm2 26/2 ACSR conductors per bundle and the following positive sequence line constant: z= 0.032 + j0.35 0/km y= j4.2 x 10-6 S/km Full load at the receiving end of the line is 700MW at 0.99 power factor leading and at 95% of rated voltage. Assuming a medium length line with nominal n line, determine the following: a) ABCD parameters of the nominal circuit b) Sendingend voltage Vs, current Is and real power Ps c) Percent voltage regulation d) Transmission line efficiency at full load

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

Chapter4: Transmission Line Parameters

Section: Chapter Questions

Problem 4.24P

See similar textbooks

Similar questions

Calculate the capacitance-to-neutral in F/m and the admittance-to-neutral in S/km for the three-phase line in Problem 4.18. Also calculate the line-charging current in kA/phase if the line is 110 km in length and is operated at 230 kV. Neglect the effect of the earth plane.
If the per-phase line loss in a 70-km-long transmission line is not to exceed 65 kW while it is delivering 100 A per phase, compute the required conductor diameter if the resistivity of the conductor material is 1.72108-m.
A bundled 500kv, 60Hz three phase completely transposed overhead line having three ACSR 1113kcmil(556.50mm) conductors per bundle,with 0.5m between conductors in the bundle. The horizontal phase spacings between bundle centers are 10,10,and 20m.Calculate the capacitance -to- neutral in F/m. and the admittance -to-neutral in S/km.
the air-filled two-wire line has a characteristic impedance of 50 Ω and is operated at f = 3GHz .the load is ZL= 100 +j40Ω . for the line above, calculation ZL on the chart the line impedance 2.5 cm from the load , the admittance, the VSWR on the line, and distance from the load to the first voltage minimum and maximum.
The line in Problem 5.14 has three ACSR 1113 kcmil conductors per phase. Calculate the theoretical maximum real power that this line can deliver and compare with the thermal limit of the line. Assume VS= VR =1.0 per unit and unity power factor at the receiving end. Problem 5.14 is the following in the picture.
three phase 60Hz, 120kV transmission line consisting of 3 conductors are placed at the corners of a triangle of sides 20, 15, and 8 meters. The radius of each line conductor is 1.5 cm. The length of the transmission line is 120 km. Assume epsilon subscript 0 equals 8.854 cross times 10 to the power of negative 12 end exponent. Determine a) Capacitance per phase per meter Answer for part 1 b)Capacitance per phase per km Answer for part 2 c) Total capacitance for 120 km Answer for part 3 d) Capacitance between the line (Cab) Answer for part 4 d) Capacitive reactance between the line( Xab) Answer for part 5 e) Charging Current for the 120 km
Please solve part (b) (a) Suppose a completely transposed 60-Hz three-phase line has flat horizontal phase spacing with 10 m between adjacent conductors. The conductors are 1,590,000 cmil ACSR with 54/3 stranding. Line length is 200 km. Assume the line voltage is 345 kV, at 60 Hz. i) Calculate the inductance in H/m. ii) The inductive reactance in ohm/m. b) Now let’s replace the conductors of the 1,590,000 cmil conductors with two 795,000 cmil ACSR 26/2 conductors, as shown in Figure below. Bundle spacing is 0.40 m. Flat horizontal spacing is retained, with 10 m between adjacent bundle centers. Investigate that what will be the impact on transmission line parameter by changing the radius of conductor. And by applying the bundle conductors concept calculate the following; i) The inductive reactance of the line and compare it with part (a). iii) Also calculate the capacitive reactance line -to-neutral in ohm/m/phase. iv) The capacitive reactance line to…
A three phase 60Hz, 120kV transmission line consisting of 3 conductors are placed at the corners of a triangle of sides 20, 15, and 8 meters. The radius of each line conductor is 1.5 cm. The length of the transmission line is 120 km. Assume epsilon subscript 0 equals 8.854 cross times 10 to the power of negative 12 end exponent. Determine d) Capacitance between the line (Cab) Answer for part 4 d) Capacitive reactance between the line( Xab) Answer for part 5 e) Charging Current for the 120 km Answer for part 6
An overhead line has the following data: Span length 160 metres, conductor diameter 0.95 cm, weight per unit length of the conductor 0.65 kg/metre. Ultimate stress 4250 kg/cm², wind pressure 40 kg/m² of projected area. Factor of safety 5.
In a 380 kV three-phase transmission system, the diameter of the overhead lines in the form of cylinder conductors is 28 mm. a) How much distance should there be between two conductors using the maximum area calculation equations? Calculate. (Puncture peak strength of air is 30kV / cm.) b) In this configuration, if the distance between phase conductors is 4 m, at what voltage level Calculate the discharge occurs? c) Maximum electric field in the same configuration, for electrode distances to be 8 m Calculate the value. If needed in calculations Ꜫ0 = 8.854x10-12 F / m
In three-phase short transmission line with end-of-line interphase voltage UR = 31,5kV , from the end of the line active power absorbed PR = 9000 kW, end of line power factor is cosφ = 0,70 (end) and the length of the line is l = 20km, The resistance of the line per km is R'= 0,125 Ohm/km, the reactance per km is X'= 0,375 Ohm/km.With the help of given information; a) Calculate the current drawn from the line (IR) as a phasor. b) Calculate the line-to-line-neutral voltage (VS) as a phasor, determine the effective line-to-line voltage (US) Calculate its value. c) Calculate the line head power factor, active and reactive power drawn from the line head, d) Draw the phasor diagram of the system. ..
TOPIC: Transmission Lines, Power Systems, and Powerplants:INSTRUCTIONS:- Answer in this format: Given, Illustration, Required Conversion, Solution, Final Answer.- Step-by-step solution, do not skip even simple calculations to avoid confusion.- If answered in written form, make sure it is readable.PROBLEM:The conductors of a three-phase transmission line are arranged in the form of an equilateral triangle with sides 6m each. If the conductors are 500 mils in diameter and the line is 25km long, what is its inductance per phase in mH? 39.7 26.3 17.4 35.5