Table of Contents
- 1 Why does power stations generate 11 kV and not 220 kV?
- 2 Why is 11kV 33kV 66kV?
- 3 Why we use 11kV 22kv 33kV?
- 4 Why DC is not used in transmission?
- 5 What is the reason of low voltage?
- 6 Why does higher voltage decrease current?
- 7 Why is output voltage 11kV 22kV 33kV?
- 8 Why are generator voltages 11, 33, 66, and 132kV?
Why does power stations generate 11 kV and not 220 kV?
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. Therefore in order to compensate for this, the primary generation voltage would be; the required nominal voltage + transmission losses.
Why is 11kV 33kV 66kV?
But we already know that there are some voltage drop due to the resistance of the transmission lines. For this reason, they transmit 10% extra voltage….If it is not related to the form Factor, What is it then?
|Sending Voltage||Receiving Voltage|
|20kV x 10% = 22kV||20kV|
|30kV x 10% = 33kV||30kV|
|60kV x 10% = 66kV||60kV|
Why power is generated at lower voltage?
The lower the current, the lower the resistance losses in the conductors. And when resistance losses are low, energy losses are low also. The lower current that accompanies high voltage transmission reduces resistance in the conductors as electricity flows along the cables.
At what kV electricity is generated?
All the power plant generate power at 11kv in India, while in US power is generated at 1.1kv, 3.3.
Why we use 11kV 22kv 33kV?
Due to the form factor=1.11, so output voltage must be multiply of form factor, so we get 11,22,33. First let us define form factor before we go into the question: Also alternators are now available with terminal voltages from 10.5 kV to 15.5 kV so generation in multiples of 11 does not arise.
Why DC is not used in transmission?
DC(Direct Current) is not used over AC(Alternating Current) in transmission because DC goes heavy attenuation while transmission over long distance as we do not transform it from Low Voltage (at which it is being generated) to High voltage (for transmission over long distance(I will explain…)) by some direct mean …
Why do we use AC over DC?
The major advantage that AC electricity has over DC electricity is that AC voltages can be readily transformed to higher or lower voltage levels, while it is difficult to do that with DC voltages. This is because the high voltages from the power station can be easily reduced to a safer voltage for use in the house.
Why we use 11kV 22kV 33kV?
What is the reason of low voltage?
Age and corrosion are a common cause of low voltage, as is dirty connections and poor insulation. Poor or damaged splicing work can also be a cause. In some cases, the wires used to carry electricity have a lower gauge than is necessary.
Why does higher voltage decrease current?
The current required to carry a given power decrease when you increase the voltage because the power is the product of the current with the voltage (and power factor).
What are the factors affecting the corona?
Factors Affecting Corona Loss:
- Atmospheric Conditions like Pressure and Temperature:
- The Inception Corona Voltage and the Disruptive Critical Voltage:
- Spacing Between Conductors:
- The Supply Frequency:
- Line Voltage:
Why do we use AC and not DC system in India?
Simply put, AC voltage is capable of converting voltage levels with just a transformer, making it far easier to transport across great distance than DC, whose conversion requires more complex electronic circuitry. Electric charge in AC periodically changes direction, causing the voltage level to reverse.
Why is output voltage 11kV 22kV 33kV?
Due to the form factor=1.11, so output voltage must be multiply of form factor, so we get 11,22,33. First let us define form factor before we go into the question:
Designers always wish to generate electric power at high voltages limit stator currents. There will be technical difficulties in design of alternators for particular voltage and current rating. Hence there is a need to strike a balance between low voltage and high voltage. The generation voltage will be in the range between 11kV and 33kV.
Why are generator voltages 11, 33, 66, and 132kV?
The real reason behind the choice of 11, 22, 33, 66 and 132kV levels is not clear from the responses to date and it may have passes into history unknown. Most likely, it was a decision arising from a standards committee and it may be an optimum transformation ratio chosen to minimize total losses. Someone still alive may yet know the reason.
Which is higher 11 kV or 13.8 kV?
E.g. 3000v + 300v = 3.3kVetc. and hence the off load generated voltages became 3, 6, 11 + 10%. 11 kV (50 Hz) is the dominant generator voltage in Europe, while 13.8 kV (60 Hz) is the dominant generator voltage in America.