Netze BW tests the interaction of electromobility and the local power grid

Netze BW tests the interaction of electromobility and the local power grid-netze

For the next six months, the network operator Netze BW will provide eight Wangen households on Maria-KnOpfler-Strasse with an electric car free of charge. The families will take part in a field trial run by the company until next spring. In the so-called NETZlabor “Intelligent Home Charging” they get a feel for the suitability of electromobility for everyday use. The starting shot was given a few days ago with the vehicle handover.

The project focuses on the question of how electromobility affects the local power grid. “Our task is to counteract possible bottlenecks in the power supply. To this end, we are testing various strategies in the area of private charging. Grid-friendly charging management is the keyword here,” explains Sven Zahorka from Netze BW. Intelligent measuring systems – digital electricity meters – are used for this and supplemented by additional control boxes. “With these two components, we can influence charging processes. This enables us to integrate a larger number of e-vehicles into our existing power grid – with the same security of supply,” says Zahorka. The experiences made in Wangen should help to develop a uniform control system for charging electric cars.

Electromobility poses new challenges for the power grids, the project manager continues. There are calculations and forecasts for this. However, the network operator does not want to rely on this alone: “We want to observe and test live in real network operation.The experiences of the project participants and their subjective feelings are particularly interesting. About how or. whether a reduction in the charging power and the associated longer charging time is perceived at all.

According to Netze BW, Maria-KnOpfler-Strasse in Wangen was specifically chosen as a typical residential area with homes that are all connected to an electrical circuit. This is based on the assumption that electromobility will gain a foothold in such areas most quickly – and as a result, ‘load hotspots’ could first appear there in the power grid. In addition, many houses there have a photovoltaic system, some use electricity for heating. “This allows us to examine the interaction of electricity feed-in from renewable energy, the power grid and consumers very well on site,” says Sven Zahorka.

Various types of e-cars with different ranges and charging capacities are in use: the project participants receive a total of three BMW i3, three VW eGolf and two Tesla Model 3 by drawing lots. In addition to the vehicles, the network operator provides every household with a charging box with a possible output of up to 11 kilowatts free of charge.

After Ringsheim, Ettenheim and Dossenheim, Wangen is the fourth of a total of five project locations in Baden-Wurttemberg as part of the NETZlabor “Intelligent Home Loading”. Initial experience of the charging behavior of the project participants could be gained in the previous locations. In addition, the effectiveness of an intelligent measuring system with a control box was tested and analyzed. The project in Wangen now represents the next step in the development towards future control of charging devices. While a separate measuring system for recording the measured values to be analyzed was installed in the previous locations, the two segments “charging control” and “measured value acquisition” work via the same built-in intelligent measuring system with control box.

With projects like the one in Wangen and with the constant expansion of the network infrastructure, Netze BW wants to promote the suitability of electromobility for everyday use. Additional investments of 500 million euros are planned for this in the network area by 2025.

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3 thoughts on “Netze BW tests the interaction of electromobility and the local power grid”

  1. LEW did that near Augsburg, ENBW near Stuttgart, Eon somewhere, RWE even once, French and British too…. must always be entirely new experiences??

  2. This provider also only thinks in one direction. Overnight home loading is massively overrated, that won’t make the sow fat. If something would make sense, then to test the bidirectional loading (but that’s the devil’s work for the suppliers and therefore also >still< forbidden). Charging at work during the day is much more interesting – it automatically uses regenerative electricity. In the evening at home, the roast tip from the car batteries is then intercepted. You can see in the agorameter when the peak loads and when the oversupply are there.
    We have two 11KW wallboxes at work – nobody charges them at home anymore!

  3. If these tests finally do away with the network operators’ prejudices against electromobility, then every small network operator should carry out such a test. In the end, everyone has to get involved, including the networks and their operators. That applies in particular to VTG, where it feels like nothing has been happening in Europe for years. All tests with this technology are driven with CHADEMO vehicles, that says it all.


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