Electrical thermal storage modeling: a tool to evaluate new opportunities and bids for residential users in a deregulated market

The purpose of this paper is to describe a useful tool for the initial analysis to assess the possibilities of residential electric thermal storage (ETS), taking into account heat storage and cool storage devices. These load models are based on an energy balance between the indoor environment, the dwelling constructive parameters, the ETS device and the internal mass through a discrete state-space equation system. The main application of this load model has been oriented towards the simulation of ETS performance in order to evaluate the possibilities of load management in the new deregulated structures of electrical power systems. The proposed model has been implemented and validated for heat storage, using real data collected during the last years in residential areas to evaluate its accuracy and flexibility. Finally, a simulation case study is presented to show the possibilities of modifying the actual residential demand profile through a storage period rescheduling proposed by the authors, taking into account the customer minimum comfort levels and avoiding program rejection.