If a transmission line has to be designed with an ultimate strength 7000 kg and a safety factor of 5. The transmission line has a span of 300 m between level supports. . If the weight of conductor is 2 Kg/m, Weight due to ice is 0.7 Kg/m and weight due to wind is 1.15 Kg/m. Determine a) Sag b) Length of the conductor
Q: Calculate the weight due to ice on a transmission line where the Total weight of conductor = 2.8…
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Q: If a transmission line has to be designed with an ultimate strength 6000 kg and a safety factor of…
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Q: (b) A transmission line conductor with weight per unit of 1.55 kg/m is installed between two towers…
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Q: Calculate the weight due to ice on a transmission line where the Total weight of conductor = 3.2…
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Q: Calculate the weight due to ice on a transmission line where the Total weight of conductor = 2.8…
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Q: Calculate the weight due to ice on a transmission line where the Total weight of conductor = 3.2…
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- Transmission line conductance is usually neglected in power system studies. True FalseA single-phase overhead transmission line consists of two solid aluminum conductors having a radius of 3 cm with a spacing 3.5 m between centers. (a) Determine the total line inductance in mH/m. (b) Given the operating frequency to be 60 Hz, find the total inductive reactance of the line in /km and in/mi. (c) If the spacing is doubled to 7 m, how does the reactance change?Three ACSR Drake conductors are used for a three-phase overhead transmission line operating at 60 Hz. The conductor configuration is in the form of an isosceles triangle with sides of 20, 20, and 38 ft. (a) Find the capacitance-to-neutral and capacitive reactance-to-neutral for each 1-mile length of line. (b) For a line length of 175 mi and a normal operating voltage of 220 kV, determine the capacitive reactance-to-neutral for the entire line length as well as the charging current per mile and total three-phase reactive power supplied by the line capacitance.
- Q2) A 3-phase load of 5 MW at a power factor of 0.9 lagging is to be transmitted over a distance of 100 km with a receiving end voltage of 66 kV, 50 Hz. Each conductor has a resistance Of 0.8 2 /km and radius of 26.1 mm, the conductors have an equilateral spacing of 2 m. Find the sending end voltage, current and power factor, by using: 1) Nominal a circuit method. 2) Nominal T circuit method.(a) A three phase transposed transmission tower comprises of three-bundled conductor and double-circuit configured in vertical position as shown in Figure 2. Each sub-conductor in each circuit and each phase is an ACSR type, size 477,000 cmil and stranding 26/7. Given the GMR of each sub-conductor is 0.8809 cm and diameter is 2.1793 cm, analyze: i. Inductance in mH/km ii. Capacitance in µF/km 0.75m 7.5m b' 4m 4m 45cm Figure 2Problem: A three phase transmission line is being supported by 3 disc insulators. The potential across top unit (near the tower) and middle unit are 8 kV and 11 kV respectively. Determine; i) ratio of capacitance between pin and earth to self capacitance of each unit, ii) the line valtage and iii) string efficiency.
- Consider the 500 kV, three phase bundled conductor line as shown in the figure below. Find the line to neutral capacitance. 0.5 m 30 mm (0) (O to Ine 15 m 15 m2. A three-phase 60-hz transmission line has its conductors arranged in a triangular formation so that two of the distances between conductors are 20 ft and the third is 40 ft. The conductors are ACSR Rook. Determine the capacitance to neutral in microfarads per mile and the capacitive reactance to neutral in ohm-miles. If the line is 115 mi long, find the capacitance to neutral and capacitive reactance of the line.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…
- 60 Hz three-phase transmission line, Each single phase transmission line consists of two hard-drawn aluminium conductors with a radius of 2 cm spaced 1.2m apart. It delivers 150 MW at 220 KV at the receiving end with a power factor of 0.88 lagging. If the transmission line is 30 Km long and the temperature of the conductors is 20 C. Ignore the skin effect and consider the resistivity of Aluminium is (2.83 x 10-8), and permeability of free space, u= 4pi*10-7 N/A2 and permeability of it is= 8.85x10-12 F/m. - Find total series impedance. - Find total shunt admittance. - Find the voltage at the sending end using long-line equation.Q1: A 3-phase of sequence ABC transmission line has a conductors of cross section area (82 mm?) and a diameter of (1 cm) as shown in figure below. Delivers a load of 15 MW at 30 kV and power factor of 0.78. Determine the efficiency and voltage regulation of the line. If the line length (65km). The line is completely transposed. For the copper p = 1/58 per meter length. 3 m 4 m 6 m 4 3 mA three-phase transposed line is composed of one ACSR Bobolink conductor per phase with a horizontal spacing of 11 meters as shown in the figure. phase with a horizontal spacing of 11 meters as shown in the figure. The conductors have a diameter of 3.625 cm and a RMG of 1.439 cm. Calculate the inductance and capacitance to the neutral of the line.