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Siemens unveils Smart Grid architecture

Siemens unveils Smart Grid architecture

Siemens Infrastructure & Cities has developed a method for power supply companies and industry to display aspects of Smart Grid systems.

The Smart Grid Architecture Model (SGAM) model can be used for the visualisation, validation and configuration of Smart Grid projects, and also for standardisation within Smart Grids.

Initial results have now been obtained from the practical application of the model in standardisation, in pilot projects.

Siemens said one of the challenges involved was to develop a technical architecture that describes the functional connections and the information and communications technology relationships between smart grid domains and participating systems and subsystems.

Aspects of interoperability have been taken into account as well as issues of availability, information security, and energy efficiency. Interoperability is depicted by five superimposed model layers: component, communication, information, function, and business. The developers also designed migration scenarios for an existing installed base. They likewise allowed for the fact that development of a power system into a comprehensive smart grid is an evolutionary process marked by gradual development in stages. That is why, said Siemens, the outcome was not so much a blueprint of a Smart Grid architecture but rather a method for the validation of Smart Grid elements' interactions.


ABB claims record breaking UHVDC development

ABB claims record breaking UHVDC development

ABB has successfully developed and tested an 1100 kV ultra high voltage direct current (UHVDC) converter transformer which it claims has broken the record for the highest DC voltage levels ever.

The Xiangjiaba-Shanghai link, commissioned by ABB, was the world's first commercial 800 kV UHVDC connection. It has a capacity of 6400 MW and covers a distance of just over 2000 km, making it the longest of its kind in operation.

The new 1100 kV converter transformer technology will make it possible to transmit more than
10 000 MW across distances as long as 3000 km.

Higher voltage levels allow larger amounts of electricity to be transported across very long distances with minimal losses using HVDC technology. Converter transformers play a critical role in HVDC transmission serving as the vital interface between the DC link and the AC network.

Development of the 1100 kV transformer addressed several technology challenges such as the sheer size and scale, electrical insulation including bushings and thermal performance parameters.


Flowserve ships first valves to Chinese nuclear plant

Flowserve ships first valves to Chinese nuclear plant

Flowserve Corporation has shipped the first of several main steam isolation valves (MSIVs) to the Sanmen nuclear power plant in China's Zhejiang province.

The MSIVs will be installed in Unit 1 of the plant, the first Westinghouse AP1000 nuclear power plant in
the country.

The shipment relates to several multi-million dollar valve orders for the China nuclear market that Flowserve has booked since
early 2010.

The massive MSIV, the largest of its kind produced by Flowserve, utilizes a Flowserve Edward gas/hydraulic actuator.

As part of the secondary system of the pressurized water reactor, the MSIV isolates the main steam line between the steam generator and the turbine. The total assembly of the valve and actuator together stands more than 6.1 metres tall and weighs more than 25 900 kg.


Cable cleat firm Ellis in £1.5m London deal with National Grid

Cable cleat firm Ellis in £1.5m London deal with National Grid

Cable cleat manufacturer Ellis has secured a £1.5 million ($2.3 million)order for its Centaur cable saddles and accessories to secure high voltage cables in National Grid's London Power Tunnels project.

When complete, there will be over 30km of tunnels carrying high voltage cables between substations in four areas of the city: Wimbledon, Hackney, Willesden and St John's Wood.

Ellis' Centaur cable saddles, which were developed specifically for use with high voltage cables, were specified by Sϋdkabel, the German manufacturers of the cables being installed in the National Grid tunnels.

The order was secured on the back of recent work for National Grid and the fact Ellis was able to prove the suitability and safety of its Centaur product for the project's specification.

Richard Shaw, managing director of Ellis, said: "This order has given us dual cause for celebration. Firstly, it's the largest the company has ever won and secondly it demonstrates why we place so much emphasis on research and development."

In 2008, Ellis launched Centaur, a heavy duty extruded aluminium saddle cleat that had been designed and developed in-house in response to a serious safety issue surrounding the restraint of high voltage cables up to 400kV with a diameter range of 100 to 160mm.

"At the time neither the British nor European Standards took into account cleats on cables of this size," explained Shaw. "This meant those specifying for such jobs were very much in the hands of the manufacturers, who in most cases simply provided warranties for their products."


Tritech has whale of a time with mammal detection system

Tritech has upgraded its Gemini SeaTec, an early warning of the presence of marine mammals in the vicinity of offshore turbine structures.

The system has been successfully field trialled on the Marine Current Turbine SeaGen installation in Strangford Lough, Northern Ireland, overseen and tested by the Sea Mammal Research Unit.

The latest version of Gemini SeaTec includes improved software algorithms for analysing moving marine life targets according to
their size, shape and swimming behaviour.

Targets are categorised using a traffic light system, indicating the probability that a moving target is a marine mammal.

'Possible' (green) targets are the correct size and shape; 'Potential'(amber) denotes upgraded 'Possible' targets that also have a path that suggests the object is not moving with tidal drift. 'Probable' (red) targets are upgraded from 'Potential' when they have a high probability of being a marine mammal. Using this scheme also allows the software to eliminate a large number of false targets such as marine debris moving passively with the tide and fish that are both too small and identified as part of a group.


Moventas in $99m deal with Areva's wind business

Finnish gear manufacturer Moventas has signed a $99 million deal to supply German renewable energy company Areva Wind.

The contract covers 5 MW gear unit deliveries for the coming years following successful deals
completed recently for two offshore wind gears.

"We are very pleased that Areva Wind trusts our leading expertise and over 30-year history in creating technically superior gear solutions for medium-speed and multi-megawatt class drive trains", saya senior vice president of Wind Gears, Arto Lahtela.

The new offshore gear will strengthen the Moventas product range, especially for the European markets, where the demand for offshore wind turbines is showing promising signs of growth.

Challenging offshore conditions set extremely high requirements for both product design and manufacturing technologies. Moventas is providing Areva Wind's international offshore wind expansion with a reliable medium speed offshore wind gear.

With a rated power of 5 MW, Areva's M5000 wind turbine with its innovative medium-speed concept has now three years of operational experience in the German North Sea, and the group is now moving into serial production. Beyond this Areva is aiming at strong international expansion, with a focus on the European markets, and in particular the UK and France.

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