Harnessing the Renewable Generation Potential

States in the U.S. and developed nations around the world have established mandates on what the amounts of socially desirable renewable generation should be. With further adoption of zero marginal cost resources, the payments for energy ($/MWh) are being reduced for conven-tional generation, which then needs to be compensated in a capacity market ($/MW). Due to the inherent uncertainty associated with these resources, other operational considerations, like ramping costs for conventional generation, may play a significant role in the financial viability of these generators. In this context, new unconventional providers of ancillary services can help in the operation of the system. The objective of this paper is to analyze the role of deferrable demand and Energy Storage Services (ESS) for planning over a year, taking the load duration curve observed in historical patterns. The objective of this paper is to study the effect of two main changes aimed at operating a secured system, while maintaining the sustainability of the system: 1) the role that ramping costs and can have in the operation of the system, to counteract the unpredictable nature of Renewable Energy Sources (RES) and 2) The optimal management of Deferrable (or controllable) loads, given the inter-temporal constraints they face, to be coupled with RES. This will extend the concept of controllable loads to include thermal storage, and in particular, the use of ice batteries to replace standard forms of air-conditioning.