Advantages of High Voltage in Transmission Line
High-voltage-in-transmission-line-advantage-and-disadvantage
Today we will know the advantages and disadvantages of a high voltage transmission line and why we use high voltage for the power transmission line.
Let us first know that at what voltage electricity is produced inside our power plant. Electricity in India is produced within 6.6KV or 11KV that is within 6600 voltage or 11000 voltage.
After this, we put a step-up transformer there. This step-up transformer takes a low voltage and converts it to high voltage and gives it to us and then we send this high voltage with the help of transmission line.
For example, we have connected 11000 voltage inside a step-up transformer, now we can increase this voltage as per our requirement. This means that the transformer can take much more voltage.
Now let us first know the advantages of giving more voltage to the transmission line.
Advantages of higher Voltage transmission lines?
1) Voltage Drop
The first benefit we get from sending more voltage to the transmission line is the voltage drop.
What is voltage drop?
We can easily understand it this way. We sent all the voltages from one place but we are not getting the full voltage at another place. Meaning that some of our voltage decreases inside the middle of the transmission line, so this is called voltage drop.
2) Transmission Wire Cost Reduced
By increasing the voltage, we get a reduction in the cost of making our transmission line.
As we all know that if we increase the voltage level, the current decreases. Similarly, when we send the voltage of the transmission line too high, then the current of our line decreases.
And we all know, the less current will pass through our wire, the thinner the wire we can use.
In this way, we reduce the current by increasing the voltage. Due to this, we have to thin the transmission line wire. And by doing this, we get a significant reduction in the cost of buying wire.
3) Reduce Power Loss
When we send more voltage, with the help of this, many losses in our electrical are reduced and we all know that if the losses are less then the efficiency of our electrical increases and which is very beneficial for our electrical equipment.
Disadvantages of High Voltage Transmission Line?
1) Insulator Size Increase
Here we are talking about the insulator, which keeps the distance between our electric pole and the wire.
As we believe simply, for 11000 voltage, we have to install a disc. This means that the higher the voltage, the more discs we have to put in.
2) Switch Gear Cost Increase
Increase in Switch Gear Size Increases Cost.
If we have increased the voltage of our system, then we will also have to bring the circuit breaker of more voltage and we always have to keep in mind that the higher the voltage of the circuit breaker or any device, the more sensitive and expensive it is.
3) Transmission Tower Height Increases
By increasing the voltage, our third loss is about the cost of building the transmission line tower.
Transmission Line Tower size depends on the voltage level.
When we increase the voltage of the transmission line, along with that we also have to increase the size of our electrical transmission line tower. If we do not do this then our phase to earth will be faulted. So we have to increase the distance of the transmission line wire from the ground as the voltage increases and because of which the cost of our transmission line increases.
4) Corona loss in Transmission Line
Corona Loss this is the last point and it is very important, you must tell this in the interview of electrical. Whenever we increase the voltage, along with it the corona loss in our transmission line also starts increasing.
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