London Array: Siemens to Provide Grid Access for World's Largest Offshore Wind Farm

FRIMLEY, England, December 14 - With its 175 Siemens wind turbines and a total capacity of 630 megawatts
(MW) the London Array offshore wind farm will, following completion, be the
largest of its kind in the world. After Siemens Energy was appointed to
supply the turbines for the wind farm, the company also received the order to
connect London Array to the power supply network. Purchasers are Dong Energy,
E.ON and Masdar, the wind farm's owners. The order volume is GBP116 million
(EUR128 million). The wind farm is scheduled to be completed by 2012 and will
be connected to London's power supply network via the Siemens grid
connection.

The wind farm is being erected in the Thames estuary off the Kent and
Essex coasts. An option is also provided for uprating London Array to as much
as 1000 MW. The wind farm will thus become the first in the 1-gigawatt class.
That will be sufficient to supply 750,000 British households with
eco-friendly electricity, which is equivalent to approximately a quarter of
the population of Greater London. "Offshore wind farms of this size place
particular demands in terms of grid access. We not only have the requisite
technology and know-how but also a wealth of experience in connecting
offshore wind farms to the grid," said Udo Niehage, CEO of the Power
Transmission Division of Siemens Energy.

Siemens will supply the electrical equipment for two offshore substation
platforms, which will be installed right at the wind farm. The substations
bundle the power generated by the 175 Siemens SWT-3.6 wind turbines, each
rated at 3,6 MW, before it is transported via high-voltage subsea cable to
the coast. On each of the platforms there are two 180-MVA transformers and
medium-voltage switchgear. The requisite protection and instrumentation and
control equipment is also installed on the platforms. Distribution over two
platforms has the advantage that the cable routes within the wind farm are
short, and power transmission losses are kept as low as possible to enhance
the wind farm's energy efficiency.

Siemens will also prepare the requisite design studies for grid access
for all of the wind farm's electrical components and prepare the grid studies
to demonstrate fulfillment of grid access requirements.

The provision of energy-efficient grid access for
offshore wind farms is part of Siemens' Environmental Portfolio. In 2009,
revenue from the Portfolio totalled about EUR23 billion, making Siemens the
world's largest supplier of eco-friendly technologies. In the same period,
our products and solutions enabled customers to reduce their CO2 emissions by
210 million tons.

Contact: Anne Keogh, Siemens plc, Tel: +44(0)1276-696312, Email: anne.keogh at siemens.com