USING ELECTRIC VEHICLE CHARGING STRATEGIES TO MAXIMIZE PVINTEGRATION IN THE LOW VOLTAGE GRID

摘要

The role of electric vehicles (EV) in the low voltage grid has been discussed lately in many projects. An efficient energy management system for control of the charging processes while considering grid aspects is expected to raise high potential to build up Smart Grid functions. One focal point is to learn about the potential synergetic effects from EV and renewable energies regarding two main questions: (1) Is it possible to load EV batteries largely based on renewable sources - in particular PV - to guarantee positive carbon minimizing effects? (2) Can managed EV charging lead to an increased integration of fluctuating renewable energy resources in the grid? These questions can only be dealt with by keeping the status of the power infrastructure in perspective at any time - reliability of supply has to be ensured with high penetration of both EV and renewable energy resources. We used a simulative approach to follow up on these, studying the effects of charging processes for different shares of electric vehicles in the rural area of north-west Germany using characteristic grid types. Starting from these, we built up target scenarios that met our goals: Maximize PV integration, stabilize the grid and still guarantee the EV users? Mobility. In this paper we present the results of scenarios with maximized PV integration and show the importance of managed charging processes to make best use of renewable feed-in for mobility purposes.