Why transmission is 11kV or 33kV 66kv?
In olden days when the electricity becomes popular, the people had a misconception that in the transmission line there would be a voltage loss of around 10%. So in order to get 100 at the load point they started sending 110 from supply side. This is the reason.
Why do we generate electricity at 11kV?
It is cheaper to generate at a relative lower voltage and then step it up for transmission. Hence, most power generating plants are designed to operate at 11KV. and hence the off load generated voltages became 3, 6, 11 + 10%.
Why is electrical transmission done in kV?
Electricity is transmitted at high voltages (66 kV or above) to reduce the energy loss which occurs in long-distance transmission. Power is usually transmitted through overhead power lines. A sophisticated control system is required to ensure that the power generation very closely matches the demand.
Why is electricity transmitted at high voltages?
The primary reason that power is transmitted at high voltages is to increase efficiency. The lower current that accompanies high voltage transmission reduces resistance in the conductors as electricity flows along the cables. This means that thin, light-weight wires can be used in long-distance transmission.
What is the meaning of 33 11 kV?
33 KV Sub-transmission system is feeding power supply to the HT Consumers and 33/11 KV Substations. 11 KV Primary Distribution system is emanating from 33/11 KV Substations feeding power supply to HT Consumers and 11000/440-220 volts Distribution transformers for supply to LT Three Phase and Single-Phase consumers.
Why we use 11kV 22kV 33kv?
In case of no load, there may be negligible voltage drop and we may get 110% (i.e. Sending + 10% extra which is 11kV) voltage at the receiving point. For this reason, transformer and substation should be rated at full 110% which is 11kV, 22kV and so on.
What is 11kV voltage?
For instance, in an 11kV three-phase system, the voltage between any two live conductors gives a line voltage of 11kV while the voltage between any live conductor and neutral (or earth) gives a phase voltage of 6.35kV.
What are the different stages of power transmission?
There are three stages of electric power supply; generation, transmission and distribution. Each of these stages involves distinct production processes, work activities and hazards. Most electricity is generated at 13,200 to 24,000 volts.
What percentage of electricity is lost during transmission?
5%
The U.S. Energy Information Administration (EIA) estimates that electricity transmission and distribution (T&D) losses equaled about 5% of the electricity transmitted and distributed in the United States in 2015 through 2019.
How far can electricity be transmitted efficiently?
A typical maximum transmission distance is about 300 miles (483 km). High-voltage transmission lines are quite obvious when you see them. They are normally made of huge steel towers like this: All power towers like this have three wires for the three phases.
What is the meaning of 11 kV?
The 11kV lines are used in residential areas and is what feeds the local transformers, which then distributes power to the buildings in the area. 33kV lines on the other hand involve much higher voltages and are used to distribute power from one small sub-station to another.
Why is electric power transmission multiple of 11 i.e 11kV?
1. Why the transformer and substation rating are mentioned in 33kV / 11kV , 11kV/440V and so on. In case of no load, there may be negligible voltage drop and we may get 110% (i.e. Sending + 10% extra which is 11kV) voltage at the receiving point. For this reason, transformer and substation should be rated at full 110% which is 11kV, 22kV and so on.
Are there any voltages that are multiple of 11?
First of all, It is not true that all the transmissions and distribution voltages are multiple of 11. In most case, they are multiple of 11 such as 11kV, 22,kV, 33kV, 66kV & 132kV.
Why are electricity in forms of 11kV 22kV and 132kV?
Of this 400kv and 765kv are not multiple of 11kv. But 11kv, 33kv, 66kv and 110kv are multiple of 11. Reason is to simplify the engineering design. You should know that, designers/engineers thought 11kv is best suited for designing a generater for size of conductor and insulation.
Which is multiple of 11kV in India?
In India we have AC transmission voltages of 11kv, 33kv, 66kv, 110kv, 220kv, 400kv and 765kv. Of this 400kv and 765kv are not multiple of 11kv. But 11kv, 33kv, 66kv and 110kv are multiple of 11.