The Study of an Energy Management Strategy within a Microgrid with Photovoltaic Production of the <<PROPRE.MA>> Project in the City of Tangier and Integrating V2G Technology

Abstract

The energy stored in an electric vehicle’s (EV’s) battery would be drawn and distributed to the electrical grid to better drive energy consumption within a microgrid that includes a renewable generator(s) managed by a specific energy management strategy. This concept, known as vehicle-to-grid technology (V2G), makes the energy stored in the electric vehicle’s battery more beneficial by discharging it to the public grid during periods of high demand. In this study, we will consider a vehicle system connected to a microgrid, which includes a photovoltaic generator reported from the <<PROPRE.MA>> project in the city of Tangier, and will elaborate on a strategy of the car connected to the V2G (vehicle to grid) network. This study proposes an optimal energy management strategy within the micro grid to charge the battery of a single electric vehicle during off-peak hours when energy costs are low, and to discharge them for driving purposes during peak hours when the energy cost is high. This is explored through a case study of two scenarios in the form of two different driving profiles of electric vehicles. The goal is to understand the behavior of the system in terms of energy redistribution from the V2G and from G2V (grid to the vehicle), and the contribution of the photovoltaic array reported by the <<PROPRE.MA>> photovoltaic generator in the city of Tangier. This study is conducted in a simplified standard Matlab microgrid with the necessary adaptation for the integration of this project generator into the grid, along with a judicious choice of an EV to ensure more explicit battery behavior in relation to our grid parameters. The simulation covers a single day (24 h). This strategy will manage the solar power, the load power, the state of charge of the EV battery, the time of day, and the driving scenario. Using two driving profiles, we will show the performance of the proposed energy management strategy. On the one hand, the V2G technology depends on the driving profile of the EV user is demonstrated. On the other hand, the 100%, 4.65% and 3.32% contributions of the 6 kW photovoltaic generator of the project <<PROPRE.MA>> in the city of Tangier are demonstrated. This contribution covers the load demand for charging of the battery of the electric vehicle that does not have the possibility to charge at work, as well as charging of the battery of the electric vehicle that can be charged at work.