What is the National Grid?

Answer 1

A National Grid is a power or energy supply system for a nation. They are called this because the network of supply lines from various generating or storage sources forms a grid in a mathematical sense, as there is usually more than one supply line to most points (or grid nodes). This allows some redundancy in the system, to allow continuous supply despite temporary breakdowns on some parts of the grid.

National grids do not necessarily cover the entire country, especially in poorer or less populated areas.

The United Kingdom has a grid for the supply of gas and a grid for the supply of electricity.

The United States has three separate electricity grids, however they are not interconnected.

Australia has a National Electricity Market (NEM) based on a transmission grid connecting the eastern states of Queensland, NSW, Victoria, Tasmania and South Australia, however the distance to Western Australia means that it operates its own South West Interconnected System (SWIS).

Answer 2

A National Grid is a network of electricity supply lines from various generating stations There is usually more than one supply line to most points (or grid nodes), from more than one generating station. Having this allows some redundancy in the system, to allow continuous supply of electrical power despite temporary breakdowns of some parts of the grid.

National grids do not necessarily cover the entire country, especially in poorer or less populated areas.

The United Kingdom has a National Grid of pipelines for the supply of gas in addition to a National Grid of electrical cables and lines for the supply of electricity.

The United States has an electrical National Grid but it does not cover the whole of the country.

Answer 3

To pinpoint a place using the global grid system, it is necessary to name a pair of numbers called a coordinate. The first number in a coordinate is the line of latitude and the second number is the line of longitude. The coordinate represents where these two lines cross each other and is used to identify exact location on the earth's surface. Hope that helps!!!!

Answer 4

The grid starts with an alternator feeding 3 phases of current to a step up transformer. High tension wires feed these high voltages to the pylons in three phases,hence 3 wires on each side of a pylon (2 circuits). The currents are split down other pylons and other generators feed power into the grid but they must all be synchronised otherwise one generator will try to 'drive' another. The high voltage reaches it's destination whereupon it is stepped down in stages for consumption in loads (domestic appliences etc). As the voltage at the other side of the load is 0V, there is no need to connect with a wire back to the substation/power plant and is fed into earth. To imagine this as a circuit in the traditional sense therefore, imagine the earth as a large wire carrying no current.

Answer 5

The North American national grid does not make the electricity. The grid is a distribution system that transports power throughout the system to homes that are connected to it. The power for the grid is produced elsewhere at generating stations that feed into the grid.