Dave Elliott: new study of the potential for variable renewable energy (VRE) in China says that it is vast, nearly 20 TW, and that, far from adding to the problem of grid balancing, as more of both wind and PV solar is installed over a wider area, they were mutually supporting. There was a ‘complementarity between wind and solar in China, reflected in more optimal return-volatility performance of wind & solar portfolios, as compared to wind-only and solar-only portfolios’. And expanding both made it easier to deal with their variability: ‘For the same total installed capacity, wind & solar portfolios with unconstrained technology shares exhibit better return-volatility performance than portfolios with constrained technology shares. This suggests that existing scenarios in literature with pre-defined shares of different VRE technologies might be sub-optimal to support power system operation’.
Renew Extra 8th Feb 2020 read more »