2. Why is long distance power transmission sent on high voltage (high tension) wires? Compare two...
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?
Homework Answers
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2. Why is long distance power transmission sent on high voltage
(high tension) wires? Compare two...
The two wires of a high-voltage transmission line are carrying 900 A to and from a...
The two wires of a high-voltage transmission line are carrying 900 A to and from a city. The voltage between those two wires is 200000 V. In bringing electricity to individual homes, the power is transferred to low-voltage circuits so that the current passing through homes experiences a voltage drop of only 120 V. How much total current is passing through the homes of the city?
2. (15 pts) The reason why high voltage in power grid is used to transmit electric...
2. (15 pts) The reason why high voltage in power grid is used to transmit electric power is that it can reduce power waste along the transmission lines known as transmission loss. Suppose that a power station delivers 1,000 kW of power at 10,000 V to a city through wires with total resistance 3.0 22. How much power can be saved if the same power is delivered at 50,000 V?
Question 7 1 pts High voltages are used for long-distance electrical power transmission because more voltage...
Question 7 1 pts High voltages are used for long-distance electrical power transmission because more voltage means more power. high voltage prevents people from stealing the electricity. wires are better conductors at high voltages. the low currents allowed by high voltage means less power lost as heat in the wire. Water can be boiled by placing it in vacuum, because slow-moving molecules get pushed out of the liquid due to the pressure of the liquid. oxygen bubbles are pulled out...
5. There are some mission lines near their homes. While these power lines have high voltage...
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...
power system A single-circuit 60-Hz high voltage power transmission line is 370 km (230 mi) long....
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...
In most circuits the resistance of wires is negligible. Over long distances, however, it can become...
In most circuits the resistance of wires is negligible. Over long distances, however, it can become significant. Imagine a 160 km long cable from the power plant. It is 0.9 cm diameter and made of aluminum, with resistivity of 2.65x10m. It carries current to light your 60 W light bulb which is connected to your 120 V outlet. a) What is the resistance of the cable from your power plant? R- b) How much current goes through your light bulb?...
2) Two copper wires have the same voltage across them and the same length, but one...
2) Two copper wires have the same voltage across them and the same length, but one wire has twice the diameter as the other. How much power is dissipated in the wire with twice the diameter compared to the other wire?A) 1/4 as much B) 1/2 as much C) the same amount D) twice as much E) four times as much
A generating station is producing 1.4 x 10^6 W of power that is to be sent...
A generating station is producing 1.4 x 10^6 W of power that is to be sent to a small town located 6.5 km away. Each of the two wires that comprise the transmission line has a resistance per length of 3.2 x 10^-2/km. (a) Find the power lost in heating the wires if the power is transmitted at 1700 V. (b) A 100:1 step-up transformer is used to raise the voltage before the power is transmitted. How much power is...
Two three-phase power transmission lines with a nominal operating voltage of 220 kV and a frequency...
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...
An electric utility company supplies a customer's facility from the main power lines (effective voltage V0=150...
An electric utility company supplies a customer's facility from
the main power lines (effective voltage
V0=150 V) with two copper wires. Each
wire has diameter d=5.28 mm and length
l=34.83 m. The customer load current is known to
be I=191.5 A.
What is the voltage V at the customer facility
for the given load current?:
V= ___ V.
How much power P0 is delivered by
the main lines?:
P0= ___ kW.
How much power P is received by the
facility?:...
2. (15 pts) The reason why high voltage in power grid is used to transmit electric power is that it can reduce power waste along the transmission lines known as transmission loss. Suppose that a power station delivers 1,000 kW of power at 10,000 V to a city through wires with total resistance 3.0 22. How much power can be saved if the same power is delivered at 50,000 V?
Question 7 1 pts High voltages are used for long-distance electrical power transmission because more voltage means more power. high voltage prevents people from stealing the electricity. wires are better conductors at high voltages. the low currents allowed by high voltage means less power lost as heat in the wire. Water can be boiled by placing it in vacuum, because slow-moving molecules get pushed out of the liquid due to the pressure of the liquid. oxygen bubbles are pulled out...
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...
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...
In most circuits the resistance of wires is negligible. Over long distances, however, it can become significant. Imagine a 160 km long cable from the power plant. It is 0.9 cm diameter and made of aluminum, with resistivity of 2.65x10m. It carries current to light your 60 W light bulb which is connected to your 120 V outlet. a) What is the resistance of the cable from your power plant? R- b) How much current goes through your light bulb?...
2) Two copper wires have the same voltage across them and the same length, but one wire has twice the diameter as the other. How much power is dissipated in the wire with twice the diameter compared to the other wire?A) 1/4 as much B) 1/2 as much C) the same amount D) twice as much E) four times as much
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...
An electric utility company supplies a customer's facility from
the main power lines (effective voltage
V0=150 V) with two copper wires. Each
wire has diameter d=5.28 mm and length
l=34.83 m. The customer load current is known to
be I=191.5 A.
What is the voltage V at the customer facility
for the given load current?:
V= ___ V.
How much power P0 is delivered by
the main lines?:
P0= ___ kW.
How much power P is received by the
facility?:...
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