The National Grid
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8 Terms
What is the national grid
A system of transformers and high voltage cables
What does the national grid do
Connects the power stations to homes
Distributes electricity generated in power stations across the uk
The main problem getting electricity to homes
Energy is always lost in the power cables due to the resistance of the wires. The further you live from a power station, the greater the energy loss
Name 5 parts of journey of national grid
Power stations
Step up transformer
Pylons
Step down transformer
Home
What does the average power station generate
270MW of power
What does the step up transformer do
Increase voltage and decrease current as less energy is lost in the power cables when the voltage is very high
Reduces heat loss and improved efficiency
What does the step down transformer do
Increase current and decreases potential difference to 230V
Makes it safer
What is the voltage in a transmission cable
132kV
Note 
Flashcards (47)