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Coordinated voltage-control in distribution systems under uncertainty

: Diwold, K.; Mocnik, L.; Yan, W.; Braun, M.; Alvaro Garcia, L. de


Institute of Electrical and Electronics Engineers -IEEE-:
47th International Universities Power Engineering Conference, UPEC 2012 : Uxbridge, [London], Middlesex, United Kingdom, 4 - 7 September 2012
Piscataway, NJ: IEEE, 2012
ISBN: 978-1-4673-2854-8 (print)
ISBN: 978-1-4673-2856-2 (online)
Art. 6398634, 6 S.
International Universities Power Engineering Conference (UPEC) <47, 2012, Uxbridge, London>
Fraunhofer IWES ()

With the increased integration of distributed energy units (DERs) on the MV/LV level, operators of distribution systems are currently facing a challenge in terms of voltage control. Distribution systems that were initially designed for distributed consumption and central generation now face decentralized feed-in. Decentralized feed-in at the MV/LV level, can lead to dynamic and local voltage violations in the distribution system, which are hard to handle via conventional voltage control strategies. This article proposes a new optimization based voltage control framework for distribution system operation. The framework utilizes a simulation of the distribution network (DN) in combination with meta-heuristics to calculate new set-ups of the network (here reactive power of distributed generation in the network), when a voltage violation occurs. The frameworks control capabilities are tested using data from a real rural distribution network in combination with a distributio n state estimator. The results are very promising, as voltage control is achieved fast and accurate, preventing a majority of the voltage violations during system operation under realistic system conditions.