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Start: Willkommen

About us

We are an association of engineers from industry and research with the aim of making electricity grids and plants better, smarter and more economical. Our association is open for you to join upon request. We meet once a month on or offline to exchange ideas, coordinate our goals and update each other on the latest developments.


Goals of the Grid Impedance Interest Group

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Raise understanding of the role of grid impedance in the energy transition

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Discussion forum for the digitalisation of electrical grids

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Platform for discussions on the current challenges of decentralized energy supply

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We don't see grid impedance as an end in itself. Knowledge of grid impedance makes a significant contribution to the success of a decentralised power supply.

Board chair

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Prof. Dr.-Ing Detlef Schulz

Chairman of the Board

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Assoc. Prof. Dominique Roggo

Vice Chairman of the Board


MSc Stephen Hoffman

Secretary & 2nd Deputy


  • Detlef Schulz, Helmut Schmidt University,  Prof. Dr.-Ing.

  • Gerd Bumiller, Ruhr West University, Prof. Dr.-Ing.

  • Dominique Roggo, HES-SO Valais-Wallis, Prof. Dr.-Ing.

  • Christoph Gassner, Bayernwerke

  • Sante Pugliese, Christian Albrechts University, Dr.-Ing.

  • Robert Stiegler, Technical University of Dresden, Dipl.-Ing.

  • Stephan Hoffmann, morEnergy GmbH, M.Sc.

The network

Research and industry


IFES - Leibniz University Hanover

Contact person
Nico Schutte

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Contact person

Prof. Dr.-Ing. Detlef Schulz (co-initiator)

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morEnergy GmbH

Contact person

Dr.-Ing. Thanh Trung Do (co-initiator)

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Astrol Inc

Contact person

Mr. Michael Geissmann


Bayernwerk Netz GmbH

Contact person

Mr. Christoph Gassner

Egon Ortjohann

Prof. Dr.-Ing. Egon Ortjohann

University of South Westphalia

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CIRE - Technische Hochschule Köln

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Professorship for Electrical Power Supply Networks

Contact person

M.Sc. Joachim Przibylla


Ruhr West University

Contact person
Prof. Dr. Gerd Bumiller


Technical University of Chemnitz

Contact person
MSc Farhad Safargholi


D.Sc. Eng Artur Bohnen Piardi

Itaipu Technological Park


Chair of Power Electronics

Contact person
dr Sante Pugliese


UfE GmbH

Contact person
Klaus Cologne


Contact person

Assoc. Prof. Dominique Roggo


IEEH - TU Dresden

Contact person 
Robert Stiegler


DET - Aalborg University

Contact person

Hong Kong

Start: Partner

Contact us

Grid impedance in the engineering plant,
Georg-Wilhelm-Strasse 187,
D-21107 Hamburg

+49 (0)40 555 546 215

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Start: Kontakt
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