Alstom Takes World Leadership in a Key Technology for the Energy Turnaround and the Future of Very High Voltage Direct Current Grids

Mon Feb 25, 2013 5:20am EST

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A major breakthrough to integrate renewable energy sources into the European
electricity system, in collaboration with RTE and as part of the TWENTIES
project


LEVALLOIS-PERRET, France--(Business Wire)--
Regulatory News: 

Alstom (Paris:ALO) Grid has achieved the best performance ever seen in a High
Voltage Direct Current (HVDC) circuit breaker while testing a prototype at
Alstom`s testing facility in Villeurbanne, France, in presence of an independent
expert. In less than 2.5 milliseconds1, the HVDC circuit breaker interrupted
currents exceeding 3,000 amperes. These tests were conducted as part of RTE`s
demonstration activities on the architecture and technologies for DC power
grids, within the large scale demonstration project TWENTIES supported by the
FP7 programme of the European Commission. In the context of the energy
turnaround, these tests, led by RTE, contribute to the development and
implementation of new technologies which facilitate the integration of renewable
energy sources into the European electrical grid.

"European electricity transmission operators are faced with the challenge of
integrating renewable energy sources. We are proud to be one of the pioneers in
this sector", asserts RTE Chairman Dominique Maillard. 

"This technological achievement is excellent news for the entire electrical
engineering community, and a considerable advance in our industry," says Alstom
Grid President Grégoire Poux-Guillaume. "The direct current circuit breaker is a
key element in building Supergrids, both onshore and offshore. It will help to
increase the share of renewable energy on the grid."

These results validate Alstom Grid`s major technological breakthrough. The
circuit breaker is a key element of power network protection in the event of a
short circuit. Well-known for alternative current connections, the technology is
required to perform 10 to 20 times faster to be used for direct current. 

Operators increasingly use direct current to guarantee that power is carried
efficiently over long distances or to stabilise the grid as it is confronted
with a growing supply of power from variable sources. Circuit breakers are not
necessary for direct current transmission line connections between two points.
However, having a circuit breaker is vital for protecting complex so-called
`meshed` grids that will, in the near future, require the interconnection of
several points. The challenge is to avoid failures and blackouts, by cutting the
current in the malfunctioning element as fast as possible, isolating the fault
from the rest of the grid. Alstom Grid`s new circuit breaker paves the way to
multiple possibilities for future direct current grids. 

Alstom`s achievement is even more valuable as it was conducted as part of the
TWENTIES European project, which aims to foster the integration of renewable
energy, especially wind energy, within Europe`s power grid by 2020. To meet this
challenge, 26 partners in the energy sector coming from 10 member States are
"pooling their expertise". RTE, the French electricity transmission system
operator, has mobilised its R&D resources to lead these demonstration activities
on the future direct current offshore grid, one of the six demonstrators within
the TWENTIES project. 

The partners involved in the RTE lead demonstrator have identified an integrated
set of components to protect the grid in case of default and have quantified
expected performances in different network architectures. Alstom Grid`s results
already met some of these expectations, overcoming one of the major technical
obstacles for the development of large scale high voltage direct current
networks. 

Tests will continue until the summer of 2013 as part of the TWENTIES project.
The Alstom Grid teams are then planning on pursuing the qualification of this
technology through a new milestone: interrupting a 7,500-ampere current at 180
kV. 

1Comparable to the speed of the nerve impulse between the eye and the brain.

About RTE

RTE, Réseau de Transport d`Electricité, is a utility company. Our job is to
provide all of our customers with access to an economic, clean and secure
electricity supply. RTE connect its customers thanks to a suitable
infrastructure, and provides them all resources and services they need to use
it. All with an emphasis on economic efficiency, respect for the environment and
security of supply.To do this, RTE operates, maintains and develops the high and
extra high voltage power network. It guarantees the reliability and proper
operation of the power system. RTE transports electricity between electricity
suppliers (French and European) and consumers, whether they are electricity
distributors or industrial consumers directly connected to the transmission
system.

With 100,000 km of lines between 63,000 and 400,000 volts and 46 cross-border
lines, the network operated by RTE is the biggest in Europe. In 2012, RTE posted
turnover of €4,529 million and currently employs some 8,400 staff.

About Alstom

Alstom is one of the world`s leaders in power generation, power transmission and
rail infrastructure and sets the benchmark for innovative and environmentally
friendly technologies. Alstom builds the fastest train and the highest capacity
automated metro in the world, provides turnkey integrated power plant solutions
and associated services for all thermal (coal, nuclear, gas...) and renewable
(hydro, wind, solar...) energy sources. It offers a wide range of solutions for
power transmission, with a focus on smart grids. The Group employs 92,000 people
in around 100 countries. It had sales of €20 billion and booked close to €22
billion in orders in 2011/12.

Alstom Grid has 130 years of expertise in electrical grids. Whether for
utilities or electro-intensive industries or facilitating the trading of energy,
Alstom Grid brings power to its customers' projects. Alstom Grid ranks among the
top 3 in electrical transmission sector with an annual sales turnover of more
than €4 billion in 2011. It has 20,000 employees and over 90 manufacturing and
engineering sites worldwide. At the heart of the development of Smart Grid,
Alstom Grid offers products, services and integrated energy management solutions
across the full energy value chain-from power generation, through transmission
and distribution grids and to the large end user.

ABOUT TWENTIES

The European Union, in its backing for the progressive integration of renewable
energies, especially wind power, launched in April 2010 the TWENTIES Project, an
initiative whose objective is to significantly advance the development and
implementation of new technologies which facilitate the widespread integration
of wind power generation into the European electricity system.

TWENTIES, by mean of the implementation of six large scale demonstrations,
intends to remove the barriers to integrate more wind power (from both onshore
and offshore) into the European system by 2020. The full scale demonstrations
aim at proving the benefits of novel technologies, the majority coupled with
innovative system management approaches.

TWENTIES is the largest renewable energy demonstration project ever funded by
the DG Energy of the European Commission. Red Eléctrica de España, the Spanish
Transmission System Operator, is Project Coordinator and works together with
another 25 companies and institutions from 10 different Member States and one
Associated Country.

Press contacts:
RTE
Olivia Ricour - Tel +33 1 41 02 17 77 / 06 22 95 73 90
olivia.ricour@rte-france.com
or
Alstom
Emmanuelle Chatelain, Tel. +33 1 41 49 37 38
emmanuelle.chatelain@chq.alstom
Isabelle Tourancheau - Tel. +33 1 41 49 39 95
isabelle.tourancheau@chq.alstom.com
Nathalie Bourotte (Alstom Grid) - Tel +33 1 49 01 62 17
nathalie.bourotte@alstom.com



Copyright Business Wire 2013

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