Car manufacturer BMW and network operator Tennet are jointly testing an intelligent charging control system for electric vehicles. It was specially developed for BMW Charging and controls the charging processes of electric cars in such a way that the power grid is kept stable and electricity from renewable energy sources is used optimally at the same time. In the BMW i3, the control system is already fitted as standard.
Preventing grid bottlenecks
BMW and Tennet want to use the cooperation to provide low-cost charging current for customers on the one hand and to relieve the power grid on the other. Charging control prevents or reduces the charging of electric cars in the event of grid bottlenecks and thus prevents additional fossil fuels from having to be switched on in the event of high grid loads. The charging process continues when the bottleneck in the grid is bridged - ideally when sufficient quantities of electricity from wind or solar energy are available. It makes no difference whether the vehicle is charged via a public charging station, a BMW wall box or a conventional socket.
Intelligent charging saves costs
BMW has been successfully testing intelligent charging in over 300 electric cars in California for several years now. As part of a pilot project, BMW and Tennet recently also tested intelligent charging control in Germany. With reduced charging processes in the event of grid bottlenecks, the use of fossil reserve power plants can be avoided. The output from a so-called »redispatch« currently costs German electricity network operators around 500 million euros. In addition to lower redispatch costs, the integration of electric vehicles into the grid and intelligent charge control offer the potential to reduce the expansion of power lines and keep electricity prices stable. In addition, the grid-stabilizing services provided can form the basis of energy business models: With intelligently controlled charging, electrified vehicles can generate remuneration.