Friday, 29 September 2017

Share of Renewables in Total Generation Looking Good - How can it be Increased Further?

We reached 30% of electricity from renewables in quarter 2 of 2017 - thank you Regen SW for your Graphic of the Month. But this is only for one quarter - the average for 2016 was 24%.

Will we get to 30% for a whole year by 2020, which is the national target?

The seasonal variations in wind and solar PV suggest that what is most needed is more wind power to boost Q4 and Q1 generation, when solar is at its lowest, and wind is statistically higher.Reading from the graph, this would require wind going from around 12% to 18% of generation in those quarters, a 50% increase in wind generation.

You can forget storage as a means of ironing out seasonal variation - a battery large enough to store electricity in sufficient quantity to shift supply for several months would be very big, even more expensive than more nuclear power.

Any ideas on how to shift consumption from winter to summer? More energy efficient homes would help!