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Reactive power management at the network interface of EHV- and HV level

: Wang, H.; Kraiczy, M.; Schmidt, S.; Wirtz, F.; Töbermann, C.; Ernst, B.; Kämpf, E.; Braun, M.

Speh, R. ; Energietechnische Gesellschaft -ETG-:
International ETG Congress 2017. Die Energiewende. Blueprints for the new energy age. Proceedings : November 28-29, 2017, World Conference Center, Bonn
Berlin: VDE-Verlag, 2017 (ETG-Fachbericht 155)
ISBN: 3-8007-4505-4
ISBN: 978-3-8007-4505-0
Energietechnische Gesellschaft (ETG International Congress) <2017, Bonn>
Fraunhofer IWES ()
reactive power management; technical and economic potential

In the future more stringent requirements from transmission system operators (TSOs) on the reactive power exchange at grid interface of EHV- and HV level will lead to an increased necessity to control the reactive power flow within distribution grids. In addition, the change of reactive power behavior of distribution grids due to increasing penetration of distributed generators (DGs) and increasing utilization of local voltage control strategies based on provision of reactive power by distributed generators will further exacerbate the challenges. Therefore, feasible and efficient solutions will be needed in the future by distribution system operators (DSOs) to enable a reliable reactive power flexibility of their grid. In this paper, an application-oriented and cost-efficient reactive power management concept (Q-Management) is developed and introduced, which allows the DSO to control the reactive power exchange at the grid interface of EHV- and HV level by utilizing local reactive power capabilities of DGs and compensation devices. In a case study, the proposed Q-Management concept is applied in an exemplary distribution grid of Bayernwerk Netz GmbH and investigated in a simulation environment by performing time series simulation. Based on the achieved results, a cost-benefit analysis is carried out. The technical and economic potential of the proposed Q-Management concept are assessed with regard to the operation and investment costs. Finally, the advantages and disadvantages of the proposed approach are discussed in detail.