Sustainable distribution networks in Brandenburg

There are two main reasons for this: On the one hand, high grid investments are necessary for the integration of renewable energy generation plants, especially wind turbines, and on the other hand, as long as the grid infrastructure is not yet developed, costs for curtailment of the renewable energy plants are incurred. Investors of renewable energy power plants do not take into account the condition of the grid either when choosing a location nor in time of commissioning – which generates high costs for electricity customers. The potential for savings through synchronization of renewable energy and grid expansion as well as through the use of flexibilities in the grid should be investigated.

Within the scope of the study, a “Distribution Network Model Brandenburg” was developed to evaluate alternative approaches for synchronizing renewable energy systems and grid expansion as well as the benefits of decentralized flexibilities. A basic scenario and the changes by different policy measures were evaluated.

As a basis for consideration, a future scenario for the year 2030 was developed and regionalized. In cooperation with MITNETZ Strom, a simulation model was developed which allows deriving general statements about the entire distribution network in Brandenburg. Conclusions regarding technical parameters, such as grid expansion requirements, as well as regulatory factors, such as grid costs and the revenue cap, can be drawn. Various measures to reduce the financial burden on Brandenburg’s electricity customers were developed, analyzed and evaluated.

The result of the study was a clear understanding of the expected future situation: decentralized flexibilities cannot significantly reduce grid expansion requirements in Brandenburg due to a lack of spatial congruence and the difference between the installed capacity and renewable energies. On the other hand, synchronizing renewable energies and grid expansion has the potential to reduce network expansion costs by 20 %. In particular, reduced compensation for outage work and a building cost subsidy for feed-in users are suitable as concrete measures.

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