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Electrical Design of Variable Speed Hydroelectric Units

Ian Backus, Mathieu Bergeron, Derek Brown, Christiano Bühler, Roland Cheng, Lucas Delong, Jesse Fairchild, Russ Fostiak, George Girgis, Jacob Kravits, Lucas Kunz, Hans Naeff, Phil Spotts, Eric Vaughn, James Volk, Check-Kay Wong, John Yale, Masato Yano

  • PES
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    Pages/Slides: 20
White Paper 09 Jul 2022

Historically, hydroelectric units have been of a conventional design whereby the output terminals of the generator connect via switchgear to the grid. With few exceptions (e.g., Powerformer™ high-voltage generators) the connections to the grid are usually made with a generator step-up (GSU) transformer that increases the generator terminal voltage to a level commensurate with the voltage of the transmission/distribution grid. Both asynchronous and synchronous generators have been used in this type of configuration.

A Task Force was formed to investigate if present electrical standards adequately address electrical design aspects unique to variable speed hydroelectric (VSH) units1. The Task Force researched available resources from industry, government and professional organizations to identify the standards that are directly applicable to VSH design and what, if any, deficiencies exist.

Russ Fostiak
Primary Committee:
The Task Force on Variable Speed Hydro
Sponsor Committees:
Hydroelectric Power Subcommittee