Consortium for Electric Reliability Technology Solutions Grid of the Future White Paper on Accommodating Uncertainty in Planning and Operations Prepared for the Transmission Reliability Program Office of Power Technologies Assistant Secretary for Energy Efficiency and Renewable Energy U.S. Department of Energy Principal Authors Mark Ivey, Abbas Akhil, David Robinson, Kevin Stamber, Jason Stamp Sandia National Laboratories Kelvin Chu, Pacific Northwest National Laboratory CERTS Grid of the Future Project Team Carlos Martinez and Mohan Kondragunta, Edison Technology Solutions Joseph Eto and Frank Olken, Lawrence Berkeley National Laboratory Jim Vancoevering and Brendan Kirby, Oak Ridge National Laboratory John Hauer and Jeff Dagle, Pacific Northwest National Laboratory Robert Thomas, Robert Lasseter, and George Gross, Power Systems Engineering Research Center December, 1999 The work described in this paper was funded by the Assistant Secretary of Energy Efficiency and Renewable Energy, Office of Power Technologies of the U.S. Department of Energy under Contract No. DE-AC04-94AL85000.