Grid Reliability – Mr. Michaels misses the fact that renewables actually enhance grid reliability. For example, in February 2011, millions of homes and businesses in Texas suffered rolling blackouts because more than 75 fossil-fired power plants broke down due to cold weather. Those rolling blackouts would have been significantly worse had wind energy not kept producing at and above the levels the grid operator was expecting, providing enough power to keep the lights on for millions of Texas residents.
Following that event, the head of the Texas grid operator explicitly commended wind energy for its role in helping to keep the lights on.
In August 2011, the state of Texas underwent power shortages again, this time when unusually hot weather coincided with outages at around 20 fossil-fired power plants in the state. Once again, wind power was producing at or above the levels expected by the grid operator.
Grid integration — Mr. Michaels conveniently forgets that it is extremely difficult to reliably accommodate large conventional power plants on the power system. In fact, on power systems with large nuclear or fossil power plants, grid operators must maintain enough expensive, fast-acting reserve generation on standby 24/7/365 to replace the full output of the largest plant, in case it breaks down unexpectedly, as they all do fairly frequently.
In contrast, changes in wind turbines and solar energy output occur slowly, since it typically takes hours for a weather event to change the aggregate output of renewable plants that are spread over a large geographic area. Because of this and the fact that wind and solar output can be predicted using weather forecasting while conventional generator outages are unpredictable, grid operators can accommodate wind farm and solar power with slower types of reserve generation that usually cost 97% less than the fast reserves used to accommodate fossil and nuclear plant outages.
So in reality, it is more accurate to talk about needing “backup” generation for large fossil and nuclear plants than it is to talk about backup for wind power or solar power.
I could go on and on — what exactly does cold fusion have to do with this anyway? But I think I will let sleeping neutrinos lie.
By Jon Goldstein, AWEA Director of Public Affairs, www.awea.org/blog