Integration of renewable resources: Updated analysis of operational requirements and assessment of generation fleet capability under a 20% RPS requirement

This paper presents updated results from a Monte Carlo simulation method of operational needs created by variable generation renewables coupled with a Production Simulation methodology to assess whether the California ISO's existing generation fleet can provide the needed flexibility for ramping, load following and Regulation under a 20% Renewable Portfolio Standard. The production simulation methodology utilizes stochastic simulations of load and wind forecast errors and covers a wide range of operating scenarios.