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Name three protection schemes employed for High Voltage Transmission lines in an electric power system.
Two three-phase power transmission lines with a nominal
operating voltage of 220 kV and a frequency of 60 Hz are connected
in series as shown below.
Per-phase constants of the first 110 km long energy transmission
line (E.İ.H.-1); r = 0.01035Ω / km, L = 1.554 mH / km, and C =
7.387 ∙ 10-3 µF / km. Constants per phase of the second 100 km long
energy transmission line (E.İ.H.2); Zh = 1.035 + j58.58 Ω / phase
and...
A high voltage power transmission line transmitting 100MW of electrical power is operating at a voltage of 288KV. If the line loses 843KW what is its resistance (give your answer in Ohms)?
A high voltage power transmission line transmitting 100MW of electrical power is operating at a voltage of 324KV. If the line loses 956KW what is its resistance (give your answer in Ohms)?
A 7-bus power system with three generators, six transformers, and seven transmission lines is shown in Figure Q1. The per-unit reactances for the generators and transfomers are based on their rated voltage and expressed in percentage. When a three-phase fault occurs at bus 5; three transmission lines, namely L4, L5, and L6, are disconnected from the power system. By taking the base apparent power of 100 MVA and the rated voltage of generator G1 as the reference, determine the per-unit...
power system
A single-circuit 60-Hz high voltage power transmission line is 370 km (230 mi) long. The conductors are Rook with flat horizontal configuration and 7.25 ms=(23.8 ft.) conductor spacing. The load on the line is 125 MW at 100% power factor. Use attached Tables A3 to A3to determine; The sending end voltage Vs The sending end current Is The sending end power Ps The percentage voltage regulation The transmission efficiency Given that Ds for the Rook conductor is 0.0327...
5. There are some mission lines near their homes. While these power lines have high voltage (often 345 kV) they generally have modest currents (around 300 A). Model a high-voltage transmission line as an wire carrying 3000 A of current located 500 m from a building. Calculate the magnetic field in the building Compare that to the magnetic field from wires in the building, carrying 10 A of current and located 2 m from the person. Which magnetic field is...
A pair of high voltage power lines running from the Glenn Rose power plant are made of 3” diameter Aluminum wire. If the cables run 60 miles to Fort Worth, what is the electrical resistance of each line in Ohms? What is the electrical power dissipated in each line if the power is delivered at an average of current of 2000 Amperes? Does this seem like a lot of lost energy? (The text has the electrical properties of Aluminum, or...
2. Why is long distance power transmission sent on high voltage (high tension) wires? Compare two transmission lines: one at twice the voltage of the second. Which of the two lines is most advantageous to a utility company? How much is the advantage?