Frozen wind turbines in Texas caused some conservative state politicians to declare Tuesday that the state was relying too much on renewable energy. But in reality, the wind power was expected to make up only a fraction of what the state had planned for during the winter.
The Electric Reliability Council of Texas projected that 80% of the grid's winter capacity, or 67 gigawatts, could be generated by natural gas, coal and some nuclear power.
An official with the Electric Reliability Council of Texas said Tuesday afternoon that 16 gigawatts of renewable energy generation, mostly wind generation, were offline. Nearly double that, 30 gigawatts, had been lost from thermal sources, which includes gas, coal and nuclear energy.
By Wednesday, those numbers had changed as more operators struggled to operate in the cold: 45 gigawatts total were offline, with 28 gigawats from thermal sources and 18 gigawatts from renewable sources, ERCOT officials said.
“Texas is a gas state,” said Michael Webber, an energy resources professor at the University of Texas at Austin.
Wind power has been the fastest-growing source of energy in Texas' power grid. In 2015, wind power generation supplied 11% of Texas' energy grid. Last year it supplied 23% of the system's power, surpassing coal as the second-largest source of energy.