 Global grids are struggling to handle a huge expansion of renewable power. Construction of solar and wind farms has outpaced that of the infrastructure required to transport the electricity generated to homes and businesses, forcing grids in Britain, China, and the European Union to curtail the production of green power, often by paying producers to stay idle. China — which is adding renewables capacity at a breakneck pace — curtailed about 6% of its wind and solar power in January and February, up from 4% last year. In Europe, prices are increasingly turning negative and last year, nearly a tenth of Britain’s wind power, 5% of Germany’s renewables output, and 2.5% of France’s solar generation was curtailed. |