In the MeRegio project a smart grid provides a transparent and flexible tariff system for optimised renewable energy integration into the grid. The solution was by energy company, EnBW (Energie Baden-Württemberg) developed in cooperation with ABB, SAP, IBM, Systemplan and the Karlsruhe Institute of Technology (KIT).
In order to better integrate renewables into the grid, EnBW developed a dynamic tariff that allowed for flexibility in the participating customers’ consumption behaviour. Customers were provided with traffic light-based dynamic price signals, whose order changed on a daily basis. While a green signal stood for the availability of electricity at a low price, a red light signalled that electricity generation was low and was therefore, more expensive. The households had the possibility to control their energy consumption and energy data via different technological devices (computer, mobile).
The smart meter continuously relayed the consumption data of the pilot customers directly to EnBW‘s central billing system. The billing system then sent energy consumption evaluations via the Internet to the MeRegio cockpit found on each participant's PC.
An evaluation of the project showed that consumption flexibility of up to 25 per cent and an average value of 10 per cent could be achieved.
The practice has also been selected by the German Federal Ministry for Economic Affairs and Energy’s “E-Energy – Smart Energy Made in Germany” subsidies program.