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The electrons in a wire travel mostly along the outside of the wire and hence the bigger the circumference the more surface area decreasing the resistance. An analogy is a vat of water with a valve at the bottom. Imagine that the water is a store of electrons creating a potential or voltage. If you only open the valve a little, the water will flow out of the vat slowly and hence the higher the resistance. As you open the valve further there is less resistance and more water can flow.
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To reduce power losses in transmission lines the voltage is made?
Much higher.
What is the purpose of having a low impedance for transmission lines?
in order to reduce the transmission line losses we need low impedance...Low impedance also improves power transfer capacity of the line..
How do you reduce the copper losses in transmission lines?
Using larger amounts of copper will decrease copper loss (use bigger wire than necessary).
How is electrical transmission loss?
Tramsission losses are due to the inherent resistivity of the transmission medium (the wire in overhead and underground transmission lines). All substances have a specific resistance. As current is pushed through that substance, a voltage drop across that resistance will result that follows ohm's law: V = I * R. Power is equivalent to P = V * I, thus P = I^2 * R.
What is the basic parameters of transmission lines?
the basic parameters of transmission lines are R,L,C and G...........
Why there are no losses in DC transmission?
There are losses in d.c. transmission lines, due to their resistance. But there are no reactive losses. So, d.c. transmission lines have less losses in comparison to an equivalent a.c. transmission line.
To reduce power losses in transmission lines the voltage is made?
Much higher.
What are resisters used for?
Resistance bands are used to strain people's muscles, thus strengthening their bodies. Using resistance bands correctly one can replace a whole gym with resistance bands.
Why are transmission lines less than 80km considered short?
The transmission lines which have length less than 80 km are generally referred as short transmission lines. For short length, the shunt capacitance of this type of line is neglected and other parameters like electrical resistance and inductor of these short lines are lumped.
Is reactance major responsible for power loss in power transmission lines?
Reactance certainly causes loss in a transmission system, but I^2R or resistance losses are greater.
What are the Advantages of Corona in transmission lines?
Due to corona effect virtually conductor size is increase and therefor resistance in transmission line is decreases.so I2R losses will decreases...
Why transmission lines are thicker than TV cable wires?
Transmission lines are thicker than TV cable wires because the transmission lines are used to transmit both low freq and high freq signals. And the losses of the transmission lines depend the resistance of the line which inturn depend upon length and area. As we have to transmitt the signals over long distances the transmission lines are thicker in size.Whereas in TV cable wires the construction is totally different in which transmission of signals is in between two conductors thereby avoiding losses.Therefore there is no necessity for these lines to be made thicker. That is why transmission lines are thicker than TV cable wires.
What are the 4 primary constant and secondary constant of transmission lines?
resistance (R) inductance(L) capacitance(C) shunt conductance(G)
What type of losses occur in power transmission lines?
1. Wire resistance 2. Leakage around insulators 3. People stealing the power
What is the purpose of having a low impedance for transmission lines?
in order to reduce the transmission line losses we need low impedance...Low impedance also improves power transfer capacity of the line..
What do the isopach lines represent?
isopach lines are contour lines that connect areas of equal ground thickness.
How do you reduce the copper losses in transmission lines?
Using larger amounts of copper will decrease copper loss (use bigger wire than necessary).
