Grid station

The National Grid is the high-voltage electric power transmission network in Great Britain, connecting power stations and major substations and ensuring that electricity generated anywhere in Great Britain can be used to satisfy demand elsewhere. There are also undersea interconnections to northern France (HVDC Cross-Channel), Northern Ireland (HVDC Moyle), and the Isle of Man (Isle of Man to England Interconnector).

On the breakup of the Central Electricity Generating Board in 1990, the ownership and operation of the National Grid in England and Wales passed to National Grid Company plc, later to become National Grid Transco and now National Grid plc. In Scotland the grid is owned by Scottish Power and Scottish and Southern Energy Group. These groups also operated the systems until 1 April 2005, when National Grid plc took control of day-to-day operations, though the network is still owned by the Scottish companies.

Distribution:-

Electricity distribution is the final stage in the delivery (before retail) of electricity to end users. A distribution system's network carries electricity from the transmission system and delivers it to consumers. Typically, the network would include medium-voltage (less than 50 kV) power lines, electrical substations and pole-mounted transformers, low-voltage (less than 1000 V) distribution wiring and sometimes electricity meters.

Control:-

The National Grid (UK) is the high-voltage electric power transmission network in Great Britain, connecting power stations and major substations and has a synchronized organization such that electricity generated anywhere in Great Britain can be used to satisfy demand elsewhere. There are also undersea connections to northern France (HVDC Cross-Channel), Northern Ireland (HVDC Moyle), and the Isle of Man (Isle of Man to England Interconnector).

The national grid of the United Kingdom is required to provide electric power and to be able to match the supply of power to the demand which is continuously varying, sometimes gradually and sometimes quite sharply. It has to do this and to maintain stability within specified standards of frequency and voltage dealing with both sudden changes in load, and sudden changes in the available power output. Although such large grid interconnections have their own special historical and geographical peculiarities, they will all tend to use methods of control and stabilisation similar to those used by the UK National Grid, to a greater or lesser extent.