Revenue-optimized Marketing of electric Vehicles’ Flexibility Options

Inhalt:
The expansion of the charging infrastructure for battery electric vehicles leads to a significant increase in the load on distribution network level, which, without the use of charging management systems, will result in an increased need for network expansion in the future. At the same time, the flexibility of the charging processes can be used for both grid and market purposes. This contribution describes a concept for marketing these flexibility options with the aim of minimizing the electricity procurement costs for an aggregated network (pool) of charging points. A multistage marketing strategy is applied regarding both day-ahead and intraday energy trading at EPEX SPOT. It can be shown that exploiting the electric vehicles’ flexibility options (i.e. shifting the actual charging process to time periods with lower prices) leads to a significant reduction of energy procurement costs. At the same time, an unambiguous result is that utilizing a stationary battery storage uniquely to absorb forecast deviations is currently unprofitable compared to trading at the intraday-continuous market, which is mainly due to investment costs of the battery system.