Siemens Energy and the utility China Southern
Power Grid have put into operation the second
pole of the world-record HVDC system, which is
capable of transporting huge amounts of clean
hydro power to Guangdong Province. The transmission
capacity has now been doubled to 5,000 mw.
With one pole operating at plus 800kV and the other
at -800 kV, the voltage difference between the poles
reaches the world record of 1,600kV DC. In December
2009, the link had also set the world record for
first DC operation ever at a voltage level of 800 kV
DC. Since that date, Pole 1 has operated at nominal
power of 2,500 mw without any interruptions.
This has been an ambitious project including
ground-breaking product developments and we have
ultimately even managed to complete it ahead of schedule.
With DC systems operating at
ultra high-voltage levels we now
have the transmission technology of
the future in our portfolio. This technology
is ideal for transporting
clean, renewable power over thousands
of kilometers to consumers -
with nearly zero losses," said Udo
Niehage, CEO of the Power Transmission
Division of Siemens Energy.
The eco-friendly CO2-free power
totaling 5,000mw, produced by several
hydro power plants in the
remote Yunnan Province with its
high levels of rainfall will be transported
with minimal losses to the
rapidly growing industrial region in
the Pearl River delta in Guangdong
Province with its megacities
Guangzhou and Shenzhen. This will
reduce annual CO2 emissions by
over 30 megatons compared with
equivalent fossil-fueled power
plants in the power grid of Guangdong
Province.
Siemens ups stake in China JV |
| Siemens Energy is to increase its share in Shanghai
Electric Power Generation Equipment Company Ltd
from 33.7 per cent to 40 per cent. The share increase in
the JV with Shanghai Electric Group has already been
approved by the authorities. The joint venture provides
power generation products and solutions for coal-fired
and gas-fired power plants as well as for the conventional
part of nuclear power plants. Siemens and Shanghai
Electric also intend to set up a new service joint venture
for the rapidly growing Chinese steam and gas turbine
power plant market. It is intended to conclude discussions
in the second half of 2010. |
The Yunnan-Guangdong UHVDC system covers a
transmission distance close to 1,500 km. The new
ultra-high voltage level of 800kV offers global transmission
operators economical low-loss bulk power transmission
over even longer distances. Distances of 3,000
km and even more are feasible now with UHVDC technology
of this kind: At a transmission capacity of 5,000
mw losses are as low as around 2 per cent per 1,000
km, plus less than 1.5 per cent losses for both converter
stations at the sending and receiving end of the
transmission line.
Together with its Chinese partners, Siemens
designed the entire HVDC system for the Yunnan-
Guangdong project and developed and supplied the
core components for this ground-breaking technology,
which included 800kV and 600kV converter
transformers, DC filters and all 800kV direct-current
components.
Energy-efficient HVDC systems for highly reliable,
low-loss transmission of large amounts of power over
long distances are part of Siemens' Environmental Portfolio.
In fiscal 2009, Siemens generated revenue of €23
billion with products and solutions from its Environmental
Portfolio. During 2009, Siemens customers
worldwide were able to reduce their carbon dioxide
(CO2) emissions by a total of 210 million tonnes with
products and solutions from the Siemens Environmental
Portfolio. This amount is equal to the annual CO2
emissions of New York, Tokyo, London and Berlin put
together. In fiscal 2011, the annual CO2 savings are
projected to total at least 300 million tonnes, which
roughly corresponds to the current emissions of six
major cities—New York, Tokyo, London, Singapore,
Hong Kong and Rome.