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As part of the energy revolution, the German energy supply system is undergoing a fundamental transformation due to the shutdown of conventional power plants, the further expansion of renewable energies and sector coupling. Cities face the particular challenge of facilitating the sharp increase in electromobility with all associated requirements and the need to meet a significantly increased demand for electrically generated heat. "The significant increase in the number of new electricity applications presents cities with completely new, diverse challenges, which must be tackled both practically and cost-effectively. This is where our practical guide can provide a great deal of support," explains Professor Dr. Ing. Markus Zdrallek.
The project partners have researched how best to achieve this with the support of six municipal network operators. The results and recommendations for action are presented in a 300-page guide, which takes into account not only conventional measures but also alternative expansion options which use innovative operating resources such as controllable local grid transformers and load management systems. "Our objective is to identify suitable grid structures and measures that meet the requirements of the transformed energy system. The established planning and operating principles support the optimal integration of electromobility and other innovative, flexible load applications to ensure sustainable network infrastructure in urban areas," explains Dr Michael Schwan, Head of the Network Planning Department at Siemens AG.
The guide is available for download free of charge from the website of the Chair of Electrical Energy Supply Technology. The project partners also offer a workshop for grid operators and service providers, in which they present the new planning and operating principles for urban distribution networks, which enable cost-optimised expansion of the low, medium and high-voltage networks. Five dates are scheduled until the end of the year, including the date in Berlin on 25 November 2021. The number of participants is limited. Registration is now possible by e-mail to Patrick Wintzek (firstname.lastname@example.org).
The project is called “PuBStadt" and stands for "Neue Planung- und Betriebssgrundsätze für städtische Ververteilungsnetze zur Anpassung auf die Anforderungen der Energiewende” (New planning and operating principles for urban distribution networks to adapt to the requirements of the energy revolution). In addition to Bergische Universität and Siemens AG, the network operators Stromnetz Berlin GmbH, Stuttgart Netze GmbH, Rheinische NETZGesellschaft mbH (Cologne), SachsenNetze GmbH (Dresden), enercity Netz GmbH (Hanover) and Erlanger Stadtwerke AG were also involved.