- #1
Delpo
- 4
- 0
Homework Statement
2)The power stations providing electricity for the National Grid generate electricity at 25kV. The typical demand on an average winter's day in the north-west of England is 6000MW. The current output form the generators is 240kV. Transformers raise the transmission voltage to 400kV. Assuming 100% efficiency in the transformers, the current is 15kA. Each pair of 400kV supergrid conductors has a resistance of 0.034Ωk/m.
How much power is lost per kilometre heating the conductors?
Books answer:7.65MW
Homework Equations
P=W/t=VQ/t=VI
V=IR
R=VI
The Attempt at a Solution
Can type my working out sorry.