And newer technologies like large - scale battery storage and production of hydrogen are becoming economic, because they harness cheap power from
excess renewable capacity.
Not exact matches
Firm up
renewable generation by reconciling the intermittency of power from these sources and storing
excess capacity to dispatch when it's needed.
This dynamic is evident in Germany, where wholesale power prices are being depressed by must - dispatch, low - marginal cost
renewables, but balancing this intermittency is causing retail power prices to rise, both from increasing FIT commitments, and increasingly with costs like
capacity payments for baseload power stations and curtailment payments for
excess renewables.
Lastly, in a grid with 100 %
renewable power production, the generation
capacity would need to be ten times larger than the peak load, and
excess electricity would surpass the EU annual electricity consumption.
In the case of a grid with 80 %
renewables, the generation
capacity needs to be six times larger than the peak load, while the
excess electricity would be equal to 60 % of the EU's current annual electricity consumption.
We now have the situation where we are committed to continue heavily subsidising
renewable - energy projects at a time when
excess capacity is increasing and prices to non-subsidised power stations (but not to users) are falling.
It allows
renewable sources such as wind and solar power to operate at full
capacity during peak generation periods by storing
excess energy until it is needed to meet later demand.
Firm up
renewable generation by reconciling the intermittency of power from these sources and storing
excess capacity to dispatch when it's needed.
This may be reasonable in isolated island areas with small local grids, where the cost of undersea grid links to the main land, to export occasional
excess power, is very high, and it does mean that more / new
renewable capacity can be added to supply a larger contribution at other times.
Since the Heywood interconnector's
capacity was increased SA has generally been able to export any
excess renewable power it produces.
By contrast, in the «stretch» scenarios, it is assumed that interconnection creates a European market for the UK's
excess power, and that it becomes economic to build much more
renewable capacity in the UK - with up to a 35GW supergrid interconnection.
To get a regular enough power supply from non-hydro
renewables will require
excess generation
capacity and energy storage, both expensive.