it is cheaper to use high voltage of transmission because, it is cheaper to boost the voltage
up really high and keeps the current low, also the big pylons with huge insulators will
reduce the energy wasted. the transformer have to step the voltage up for efficient
transmissions and it bring back down to safe usable levels. the voltage is increase
by a step up transformer it's then reduced again at the consumer end using a step
down transformer.
The only thing missing from the above narrative is the reason itself:
Every conductor has some resistance. When an electric current flows through a
conductor, the resistance of the conductor causes loss of some of the energy. The
loss is LESS when the voltage is higher and the current is smaller. The big pylons,
the huge insulators, and all the step-up and step-down Transformers wouldn't be
necessary if the voltage was the same 110 volts all the way from the generating
plant to your house. But shipping it at high voltage saves more energy than the
cost of all that extra infrastructure.
To keep the voltage drop along the lines to a minimum, as well as to reduce the cross-sectional area of conductors and, therefore, their weight and cost, to practical levels, the load current must be as low as possible. For any given load, the higher the supply voltage, the lower the load current.
A secondary advantage is that lower load currents also mean lower line losses. But the primary reason is to reduce voltage drop and to minimise conductor size to practical values.
from what i can remember its so that less energy is wasted when the electricity travels through the national grid . the voltage is then decreased afterwards .
EHV lines are type of electrical lines commonly used for experimentation in physics. They stand for 'Extra High Voltage' lines.
some of the applications which i think are:high voltage power transmissioninsulation testingmeasurement of insulation resistancebreakdown voltage measurementsmeasurement of electric stress on different materialstesting of power transmission equipmentslightning simulationstudy of high voltages transients/surges on transmission lines
the inductive load which is generally use in high voltage transmission line known as transformer. the transformer transform the high voltage to low voltage.
Power stations use step-up transformers to transmit power at a high voltage instead of a high current. This reduces the power lost in the transmission lines.
Air-blast circuit breakers are used to disconnect high-voltage transmission or distribution circuits in the event of a fault. One circuit breaker is required for each of the three line conductors; there is not normally a neutral conductor in high-voltage three-phase transmission/distribution lines.
your mothers gash
High voltage reduces the amount of energy wasted in transmission lines.
i think 11kv per insulator
EHV lines are type of electrical lines commonly used for experimentation in physics. They stand for 'Extra High Voltage' lines.
Yes, the frequency stays the same. Only the voltage and current change as the voltage is stepped down.
Overhead wires do not require insulation, and it is easier to plant poles than dig miles of trenches.
some of the applications which i think are:high voltage power transmissioninsulation testingmeasurement of insulation resistancebreakdown voltage measurementsmeasurement of electric stress on different materialstesting of power transmission equipmentslightning simulationstudy of high voltages transients/surges on transmission lines
its because of transformers . they work with pulse
the inductive load which is generally use in high voltage transmission line known as transformer. the transformer transform the high voltage to low voltage.
for sake of safety and protection the high voltage transmission lines are erected in less populated areas ie. villages , these lines have operating voltages about 220kv , 440kv , 132 kv( high tension lines) . while in cities the voltage is distributed at low voltages ( about 11kv(industry) , 440v residential ) because of safety issue . since corona loss highly depends on the operating voltage of lines thats why it is mostly seen in villages.
The insulators used on high tension transmission lines and on distribution lines are made of either glass or ceramic shaped in a mold. On high tension lines several are typically stacked to create a compound insulator that can avoid arcing at the voltage on the lines.
In a power transmission there is a need for step up and step down the voltage for a certain distance. So we cant use dc for a particular distance.AnswerD.C. transmission is used for long-range extra-high voltage transmission, for under-sea high-voltage transmission, and for international 'links'. The equipment for achieving these voltages is far more complicated/expensive compared with transformers, making short distance d.c. transmission uneconomical.