Both. That way a lot of power can be transmitted. The largest UK grid circuits work at 400 kV and a line of pylons can transmit up to 6000 MVA.
If both the voltages do not match then there will be current fllow from higher voltage to low voltge, this is loss of power and can lead to even tripping of the system.
The v in vdc stands for volts. The dc stands for direct current. This is a voltage that you find in batteries and is not to be confused with AC which is alternating current which is the electricity in the utility grid that feeds your home electricity.
The voltage at which a super grid operates can vary depending on the specific grid and its design. Generally, super grids operate at very high voltages, typically in the range of hundreds of kilovolts (kV) to several hundreds of kilovolts (kV), or even higher. These high voltages are necessary to transmit large amounts of electricity over long distances with minimal losses.
Explain how energy losses can be minimised when converting it into forms for use by consumers: Transformers help. Step-up Transformers convert a low voltage and a high current. The low current loses less energy over long distances. A step-down Transformer does the opposite and can likely be found somewhere down the street from you (in America they are the large green boxes that you are told never to touch). Electricity is supplied to consumers through the National Grid at a very high voltage to reduce energy losses during transmission. Transformers are used to increase or decrease the voltage of the supply. Electricity is charged in units. One unit is equivalent to one kilowatt of electricity used for one hour. Power stations are built in order to generate electricity. There are four main stages: *the fuel is burned to boil water to make steam. *the steam makes a turbine spin. *the spinning turbine turns a generator which produces electricity. *the electricity goes to the transformers to produce the correct voltage. The energy needed to boil the water comes from fossil fuels or nuclear fuels. Renewable energy resources such as wind and wave power may drive the generators directly. The National Grid: Electricity is transferred from power stations to consumers through the wires and cables of the National Grid. When a current flows through a wire some energy is lost as heat. The higher the current, the more heat is lost. To reduce these loses, the National Grid transmits electricity at a low current. This needs a high voltage. Power stations produce electricity at 25,000V. Electricity is sent through the National Grid cables at 400,000V, 275,000V and 132,000V. Step-up transformers are used at power stations to produce the very high voltages needed to transmit electicity through the National Grid power lines. These high voltages are too dangerous to use in the home, so step-down transformers are used locally to reduce the voltage to safe levels. The voltage of household electricity is about 230V. energy transferred (kWh) = power (kW) x time (h)
In the National Grid there are 876 thousand pylons.
to transmit current to other submission
The voltage of the French National Grid is 2000 mw high voltage. It is a direct current electrical interconnector between the British and French transmission.
The grid current in a vacuum tube increases as the grid voltage becomes more positive and decreases as it becomes more negative. Excessive grid current can damage the tube and cause distortion in the output signal. It is important to operate vacuum tubes within their specified grid current limits to prevent damage.
It takes voltage to "push" the electricity over distance. So it requires much greater voltage to move it over miles of power lines than it does from room to room.
Grid stations are the station which reduce the High Voltage to Low Voltage and increase the Current, the Current is Low and Voltage is High at the Generation Plant to reduce the energy losses during transmission of Electricity.
it is a station which reduces high voltage to low voltage and increases current.
transformers
it accelerate the motion of electron emitted by the filament if given a positive charge, similarly if negative voltage to grid the current flow through the grid is reduced. the more positive grid shows less current.
220v ac UK and Europeans will need an adapter, but otherwise ok. US will need a converter.
When a fault occurs in the national grid, the system activates protection mechanisms to prevent damage. Switching to low voltage helps reduce the stress on the grid and protect equipment from overheating or damage. This safety measure also helps isolate the faulted section of the grid until it can be repaired.
If both the voltages do not match then there will be current fllow from higher voltage to low voltge, this is loss of power and can lead to even tripping of the system.
Transformers reduce energy loss through the national grid by stepping up the voltage for long-distance transmission, which reduces the current flowing through the lines and consequently reduces energy lost as heat due to resistance in the wires. By stepping down the voltage back to usable levels for end-users, transformers deliver electricity more efficiently across the grid.