Chapter 5, Problem ACSQ

The figure shows a common spacing for a 345 kV line using ACSR Drake conductors in bundles of two conductors with a bundle spacing d = 18 in and distances as shown. Calculate: (a) the line-to-neutral capacitance per mile, (b) the line-to-neutral capacitive susceptance per mile, (c) the per phase inductance per mile, and (d) the per phase inductive reactance per mile. 18" 7' 18" 18" 24' 24'

In terms of cable performance, what are the effects of temperature fluctuations on transmission cabling?

There are conductor x (number of conductors = 3) and conductor y (number ofconductors = 2’) for a 50 Hz single phase two-conductor line as shown in Figure below. The linelength is 20 miles. a. Calculate GMRx, GMRy and GMD b. Calculate Lx, Ly and total L in H/m. c. Calculate XL in /m per circuit.

A 60 Hz, three-phase, transposed transmission line, is designed with three bobolink conductors per phase, in horizontal arrangement as shown in the figure below. Distance between consecutive phases is D = 6.2 m and distance among bundle conductors is h =0.5m. Each conductor has a radius of 18 mm and a GMR of 14.39mm. The per phase resistance is 1.677x10-5 2/m. r= 18 mm GMR= 14.39 mm a b h D D The per phase shunt admittance assuming zero conductance in µO/km is: О a., 5.4347 O b. j5.3316 О с /4.2266 O d. j4.0973 O e. 59630.2922 + j10.9770

Some electricians do not bother to calculate the minimum size of neutral service conductor. They size the minimum ungrounded conductor size and then use this information to determine the minimum neutral conductor size. Explain how they determine the minimum neutral size using the minimum ungrounded conductor siz

A dc two line distributor AB 600 metre long is fed at 440 V from substation A and at 430 V from substation B, the load are: 100 A at C (150 m from A), 200 A at D (150 m from C), 250 A at E (50 m from D), 300 A at F (100 m from E). If each line conductor has a resistance of 0.01 ohm per 100 m, calculate the current supplied from substation A and B and the voltage across each load.

4/ Which parameter is neglected or ignored in Short Transmission Lines? A. SHUNT CAPACITANCE ONLY B. SERIES CONDUCTANCE AND SHUNT CAPACITANCE C. SHUNT CONDUCTANCE AND SHUNT CAPACITANCE D. SHUNT CONDUCTANCE ONLY

High Voltage level in Transmission system ensures ………………… a. High current in Overhead conductors b. Less power factor c. Low Power Transfer d. Reduction in conductor size

A bipolar HVDC link is delivering 1000 MW at ±400 kV at the receiving end. Calculate the losses in the line, assuming the resistance per conductor as 1 2. Also estimate the sending end power, sending end voltage, power in the middle of the line, and line losses. Ans:=PLosses = 3.75 MW, P,= 1003.75 MW, V401.25 kV, P=1001.562 MW