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Distributed grid-forming inverters in power grids

: Unruh, P.; Gühna, T.

Fulltext urn:nbn:de:0011-n-4817477 (1.3 MByte PDF)
MD5 Fingerprint: e4fa03535c8e29743b68c2de72c0321a
Created on: 3.2.2018

Betancourt, U. ; Energynautics GmbH, Darmstadt:
7th Solar Integration Workshop 2017. Proceedings : International Workshop on Integration of Solar Power into Power Systems, 24-25 October 2017, Berlin, Germany
Darmstadt: Energynautics GmbH, 2017
ISBN: 978-3-9816549-5-0
International Workshop on Integration of Solar Power into Power Systems <7, 2017, Berlin>
Bundesministerium für Wirtschaft und Technologie BMWi
0325796A; Transstabil-EE
Conference Paper, Electronic Publication
Fraunhofer IWES ()
droop control; black start capability; grid forming inverter; grid impedance estimation

In terms of grid stability a big challenge results from the massive expansion of renewable energies and the reduction of conventional power. In future, new ancillary services for grid integrated power inverters are needed while increasing the renewable power generation in the grid. In this paper a novel inverter control algorithm will be introduced. Such decentralized inverters participate directly in forming the grid voltage and grid frequency. In the following they are named as grid-forming inverters. Unlike conventional current controlled inverters, they are voltage controlled, so that they act as voltage source. This means, that issues of virtual inertia, uninterruptable power supply and black start capability are all covered by this technique.