Siemens unveils new offshore wind power innovation

Siemens has made a breakthrough in its transmission technology that looks set to be an ideal fit for the offshore wind power industry.

The German company has launched a new direct-current technology solution, which enables cost-efficient and simplified grid connection for offshore wind power plants. Power Technology website reports that unlike conventionally used large central converter platforms, the new platform housing Siemens' transmission technology will be much smaller.
Siemens offshore
It can also connect multiple smaller platforms sequentially in a wind farm and then route them to an onshore transformer substation.

Jan Mrosik, Siemens Energy Management Division CEO, said the technology offers a boost to the industry’s ambitions of innovating down its costs, saying, "Our new solution will play a major role in decreasing the cost of offshore wind power below ten cents per kilowatt hour by 2020.”

The compact design of the new solution allows the use of encapsulated high-voltage electrical equipment, especially installation of diode rectifier units (DRUs), instead of the usual air-insulated transistor modules.

Each of the DRUs has a transmission capacity of 200MW, and is the core of the new transmission technology, along with the transformer, the smoothing reactor, and the rectifier, all of which are combined in one tank.

Besides being modular and flexible, the new solution reduces the volume of platform structures by four-fifths and weight by two-thirds, which, in turn, can result in cost reductions by more than 30 per cent.

It also increases transmission capacity by one-third and reduces transmission loss by 20 per cent.

Mrosik added, "As the only provider on the market, we have already successfully commissioned four offshore direct-current connection projects. Now we are applying our experience directly to the next generation of direct-current grid connections.

"This is how we plan to make the direct-current technology used in Germany more interesting to other markets, too."

German Federal Ministry of Economics and Energy (BMWi) is financing the new Siemens' technology solution as a part of the federal government's sixth energy research programme under the supervision of project sponsor Jülich.

 



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