An Integrated Market-Operation Optimization Framework for EV-Renewable Energy Coordination in Distribution Systems

This paper proposes a charging/discharging optimization framework for electric vehicles (EVs) in coordination with renewable distributed generation (DG). The proposed framework integrates market and operational objectives to provide economic benefits for both entities while ensuring reliable operation of the distribution system. The market objective is to minimize the renewable under/over production and the operational objective is to minimize the annual cost of the distribution system. A market-based optimization is first developed and evaluated for its potential adverse grid effects. A capacitor siting/sizing optimization is then proposed to reduce such effects. The integration of these optimization methods provides the proposed EV-renewable DG coordination. The coordination framework is tested on a real 13.8 kV, 134-bus distribution network and its efficiency is assessed by several case studies.