United Kingdom

United Kingdom

Siemens named in Wobben patent suit

UK: Enercon owner Wobben Foundation is suing Siemens for a patent infringement of turbine pitching technology.

Siemens' 6MW turbine is being used at Dong's Westermost Rough project in the North Sea
Siemens' 6MW turbine is being used at Dong's Westermost Rough project in the North Sea

Siemens has been named in the suit, alongside Dong Energy and A2Sea and the companies which own Westermost Rough and Gunfleet Sands. The legal action has been brought by Wobben Properties.

London Array Ltd has also been named in a separate suit concerning the same patent. Both cases will be heard together at a UK high court in June 2015.

Enercon successfully sued Gamesa over a storm control patent in Spain last year. Gamesa was ordered to pay €7 million in damages.

Wobben Properties claims that Siemens' High Wind Ride Through (HWRT) technology infringes upon its European patent.

The technology is designed to allow turbines to operate at higher wind speeds.

The 630MW London Array project uses 175 Siemens 3.6MW turbines, which are allegedly in breach of the patent.

Gunfleet Sands' 12MW demonstration project hosted Siemens new 6MW turbines for offshore tests. Dong's 210MW Westermost Rough project is the first commercial site to use the 6MW turbines.

Westermost Rough is jointly owned by Dong (50%), the Green Investment Bank (25%) and the Marubeni Corporation (25%).

A Siemens spokesperson said, "Siemens is confident that the features and functionalities marketed by Siemens including HWRT do not infringe any valid third parties' intellectual property rights and intends to therefore continue to defend these court actions."

The spokesperson added Siemens had already defended a patent infringement claim in Germany, which Wobben has appealed.

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