Electric mobility threatens stability of electricity supply, study says: Page 2 of 2

January 24, 2018 //By Christoph Hammerschmidt
Electric mobility threatens stability of electricity supply, study says
Many see electric driving as a technology of the future. But it's not that simple: An analysis by consulting firm Oliver Wyman warns of widespread power cuts if electromobility quickly finds too many friends.

As an economically more attractive alternative to the slow and expensive expansion of the grid, the authors of the study propose to make charging processes more flexible. The charging processes of electric cars are usually so short that they are connected to the mains for the longest time at night without being actively charged. Most charging processes therefore have a time flexibility. You do not necessarily have to start at the moment the car is plugged in. Instead, the charging process can also begin later at night without an electric car user having to forego his fully charged vehicle the next day. Jörg Stäglich, head of the energy team at Oliver Wyman: "Due to the increased flexibility, network utilization is spread over a longer period of time so that there is no network congestion. This minimizes the risk of a widespread power failure. Above all, an intelligent software solution is required for implementation."

Even if only 30 percent of electric vehicles take part in the flexible charging process, the peak load drops significantly. The higher the percentage of electric cars with flexible charging processes, the lower the likelihood of network congestion. If the network operators succeed in winning at least 92.5 percent of the owners of e-vehicles for flexible charging, there is no need to expand the network, even if the e-vehicle quota is 100 percent. According to energy expert Fritz, flexible charging is thus a "real alternative to conventional grid expansion".

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