Day-Ahead Stochastic Scheduling Model Considering Market Transactions in Smart Grids

The integration of renewable generation and electric vehicles (EVs) into smart grids poses an additional challenge to the stochastic energy resource management problem due to the uncertainty related to weather forecast and EVs user-behavior. Moreover, when electricity markets are considered, market price variations cannot be disregarded. In this paper, a two-stage stochastic programming approach to schedule the day-ahead operation of energy resources in smart grids under uncertainty is presented. A realistic case study is performed using a large-scale scenario with nearly 4 million variables with the goal to minimize expected operation cost of energy aggregators. Three scenarios are analyzed to understand the effect of market transactions and external suppliers on the aggregator model. The results suggest that the market transactions can reduce expected cost, while the external supplier offers risk-free price. In addition, the performance metric shows the superiority of the stochastic approach over an equivalent deterministic modelThis work has received funding from the CONTEST project - SAICTPOL/ 23575/2016; and from National Funds through FCT under the project UID/EEA/00760/2013 and Bruno Canizes is supported by FCT Funds through SFRH/BD/110678/2015 PhD scholarship