Power Transmission

Power Transmission ......
Transport lines for electric power are considered the most important fundamentals of electricity studies, such as study of transport costs, quality of transport, selection of suitable places for transport, as well as determining the places of construction of stations, whether the power plants or transformer stations, both lift stations which are often located very close to production stations such as dam The high lift station attached to the high dam dam of Peteng 15.5 KV will be raised to 500 KV
Or transformer stations cut .. Down from 500 to 220 and 132 W.
Let's say electric power is two ways.
First by air lines and second by ground cables
The first is the low cost compared to ground cables (power transmission lines for high voltage and high-voltage cables only in rich countries such as Europe and some Gulf countries)
Many prefer to transfer capacity through air lines for more than one reason. As mentioned earlier, low cost and other reason, the ease of knowing faults, because any fault is easy to know, such as the fall of a cable or more. The place of holidays and then drilling it means great money ....
Good thoughts can be answered by one of us Why prefer to transfer capacity, especially between cities with a high effort means 500 KV, for example in Egypt and some countries of the world .. In some Gulf countries transfer 400 KV and some countries ...
The answer to this trick ... from the relationship of effort and current
A known law of power is that P = V * I * 1.73 * 0.8
Means the ability to equal the voltage in the current in the power factor in islands 3
Ok, but here is an excellent response to the current
I = P / V * 1.73 * 0.8
We understand from the law that the relationship of the current to the voltage is inverse as the voltage decreases
And we originally want to transport transport costs remains for the left movable current little remains the use of aerial wire area cut a few .. It costs and costs Kkn Haikl loss of effort means transport efficiency will increase
The relationship of the current to the area of ​​the section will remain the same
R = P * L / A
Where R .... resist the wire
Where P .... Specific resistance to the type of wire material whether copper or aluminum
Where L .... wire length
Where A .... space wire clip
We understand from the law that it is desirable to transfer resistance to the line because the current is provided in the area of ​​the section because the relationship of resistance and the area of ​​the section of the law is inverse relationship.