Southeast Vienna substation

“Vienna’s Largest Power Outlet”: APG Invests €300 Million in the Vienna Southeast Substation

By 2035, a central electricity hub will be established to ensure supply security, integrate renewable energy, and promote economic development—with an impact extending far beyond the federal capital; Vienna’s connected capacity will be doubled

The modernization and expansion of the 380-kV switchgear at the APG Vienna Southeast substation marks the start of one of the country’s most important energy infrastructure projects: At the invitation of the Austrian transmission system operator Austrian Power Grid (APG), Josef Taucher, SPÖ member of the state parliament and city councilor, chairman of the Wiener Stadtwerke subcommittee (representing City Councilor Ulli Sima), Andreas Graf-Matzner, Vice President and Country Manager of CloudHQ Germany; Gerhard Fida, Chairman of the Executive Board of Wiener Netze; and Gerhard Christiner, Spokesperson for the APG Executive Board, took part in the symbolic groundbreaking ceremony.

Grid Expansion: The Foundation for Austria as a Place to Live and Do Business

“An efficient grid is the backbone of the electricity supply—only when generation, transmission, and consumption work together holistically can the decarbonization of the energy system succeed,” says APG Board Spokesperson Gerhard Christiner, urging a focus on the big picture. He adds: “Our grid development plan calls for projects with an investment volume of around nine billion euros by 2035—this will enable us to create the next generation of the power grid.”

Referring to the mega-project in Unterlaa, Christiner emphasizes its importance for Vienna, the eastern region, and the entire country: “Locations like southeast Vienna are of particular importance: As electricity hubs, they function like giant power outlets that integrate renewable generation, industrial transformation, and digital infrastructure.” With this 300-million-euro modernization project, we’re creating new capacity for electricity-intensive customers such as data centers. In addition, we are doubling Vienna’s connection capacity and securing the supply for the federal capital—as well as the entire eastern region—for the coming decades. We will be retrofitting the facility step by step over the next 10 years, while it remains fully operational and supports the system throughout Austria: After all, in 2025, a total of approximately 22 terawatt-hours of electricity was transmitted via the Vienna Southeast substation—that’s equivalent to about one-third of Austria’s annual consumption on the public grid!”

Click here for the event video

For more information, see “Vienna’s Largest Power Outlet”: APG Invests €300 Million in the Vienna Southeast Substation

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