Integrating Renewable Energy into the Electricity Grid

The report surveys what utilities and independent system operators (ISOs) with relatively high shares of variable renewable generation are doing to integrate those resources into their systems without compromising reliability. Brattle focuses on two case studies – the Electric Reliability Corporation of Texas (ERCOT) and Xcel Colorado. The in-depth case studies show ancillary service reform, improved forecasting, and other policy tweaks increased the flexibility of the system and enabled renewable integration beyond what is required by the Clean Power Plan.