A just-published report
by the World Bank’s Energy Sector Management Assistance Program
(ESMAP) on the integration of variable renewable energy (VRE) into national grid systems shows once again that adding solar, wind and other forms of VRE does not represent the calamity for grid operators or the high costs that are frequently claimed, particularly in mainstream media
. In fact, with proper planning, integrating relatively high levels of renewable energy generation into a large, interconnected grid is feasible at modest incremental cost.
This is important because with the cost of renewable energy continuing to fall, VRE is looking increasingly attractive. Just consider the recent results from South Africa’s renewable energy auctions
Why then does the discourse around renewable energy continue to view it as a pesky annoyance at best, and a costly gamble at worst? Terms such as “intermittent” and “backup” are often used to pour cold water on the contribution that renewable energy might provide or to question the reliability of solar or wind generation. In addition to the damage they inflict on efforts to promote clean energy, they hint at a very conventional view of electricity systems that is rapidly becoming outdated.
Taking these two particular terms in turn, let us explore them in more detail.