Tags Posts tagged with "wind turbines"

wind turbines

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Acciona Windpower has signed a contract with wind power developer Voltalia for the supply of 99 MW total capacity for the Vila Pará wind farm in the state of Rio Grande do Norte (northeastern Brazil). The contract covers the supply, transportation, installation and commissioning of the 3-MW wind turbines, as well as a long-term maintenance service agreement.

The AW125/3000 model turbines each have a rotor diameter of 125 meters and a capacity of 3 MW. They will be assembled in the plant that Acciona Windpower opened in Simões Filho (Bahia) last December. The 120-meter towers to support the turbines will also be built by the company in Brazil, in its plant at Areia Branca located near the future wind farm.

Supplies for the Vila Pará wind farm are planned to take place in 2016. The complex was awarded to Voltalia in the Leilao A-5 call for tender in 2013 and the decision made by the Brazilian Government in December that year.

With the new contract, Acciona Windpower has sold 1,119 MW of capacity in Brazil since it began marketing its AW3000 wind turbine in 2012.

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    The development of wind turbines into multi-megawatt power plants leads to increasingly higher forces and torque which in turn subject the components to ever-increasing loads. At the same time, any downtimes and maintenance work generate higher costs, especially in the case of offshore installations. A phenomenon that has a negative influence on the reliability of bearings, not only in the wind power sector, are the so-called white etching cracks (WEC) and as such, reliable components have a key role to play.

    WEC are structural changes in the material that form below the surface of the bearing. These changes result in the formation of cracks which extend to the surface during stress conditions under different external loads. As a result, the inner or outer ring may crack and cause the affected bearing to prematurely fail. These cracks occur in both through-hardened and case-hardened rolling bearings. Schaeffler’s innovative solutions help increase the resistance of the bearings to WEC and prevent premature bearing failure.

    It is still not completely clear what causes WEC to occur. In line with current knowledge however, there is scientific proof according to which, additional stresses in the form of dynamics, mixed friction and the effects of electrical systems create the conditions needed for WEC to form. Read more…

    Article published in: FuturENERGY June 2015

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      The need to install offshore wind turbines in increasingly deeper water will create a demand for larger and heavier foundations and therefore, for cost effective designs. New innovative foundation designs for offshore installations could prove to be more cost effective than conventional foundations for projects involving deeper waters and larger wind turbine sizes. These are the findings of a commercial study carried out by mec these are the findings compares various offshore wind foundation designs based on multiple cost parameters.

      MEC Intelligence has launched a commercial study that compares the cost of a range of offshore wind foundation designs. Conventional foundation designs such as monopiles and jackets have been compared with new innovative designs such as gravity-based and suction-based foundation designs. The results of the study indicate that innovative foundation designs could prove to be more cost effective than conventional foundations for projects with increasing depths and turbine sizes.

      Foundations represent a large investment in the construction of an offshore wind farm, with around a 21% share of the total cost of an offshore installation. Foundation cost is primary driven by materials (50-60%) and installation costs (15-25%), together representing 65-85% of the total outlay. Read more…

      Article published in: FuturENERGY June 2015

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      Siemens has received an order for the supply, installation and commissioning of 40 SWT-3.2-113 direct drive wind turbines. Customer is Grand Bend Wind Limited Partnership, a partnership between Northland Power Inc., a Canadian independent power producer based in Toronto, and two local First Nations, the Aamjiwnaang First Nation and Bkejwanong Territory (Walpole Island First Nation). The Grand Bend wind power plant will be erected around 220 kilometers southwest of Toronto in the Canadian province of Ontario.

      The total capacity of this100-megawatt onshore project will be sufficient to provide eco-friendly electricity to approximately 30,000 Canadian households. All 120 of the 55-meter-long rotor blades for the wind turbines will be manufactured at the Siemens plant in Tillsonburg, Ontario. Construction work for the site is already underway. Commercial operation is scheduled for the first half of 2016. Siemens will also be responsible for service and maintenance of the wind turbines over a period of ten years.

      “Canada is one of the most important markets for us across the Americas,” declared Thomas Richterich, CEO of Market Unit Onshore in the Siemens Wind Power and Renewables Division. “For the first time we will be supplying wind turbines for a Canadian project to Northland Power.” Northland Power is the main shareholder, owning sixty percent of the shares in the largest Dutch offshore wind power plant Gemini. Siemens is supplying 150 wind turbines, each with a capacity of 4 megawatts and a rotor diameter of 130 meters, for this 600-megawatt project and will also be responsible for service and maintenance for a period of 15 years.

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      The Port of Oostende welcomed the jack up vessel WIND for the first time, this morning at 4:00 am. The 55 meters long and 18 meters wide Danish jack up vessel comes to pick up parts that need to be transported to the offshore wind farm Belwind. The Belwind wind farm, at 55 km distance from Oostende, is operated by Park Wind, which is so far the most distant offshore wind farm off the Belgian coast. Belwind has been operational since 2010 and provides green electricity for 160,000 households. There are 55 turbines of 3MW. The manufacturer of these turbines is MHI Vestas Offshore Wind.

      Both Parkwind and MHIVestas have offices and storage space on the Rebo terminal in the Port of Oostende. MHIVestas Offshore Wind is established in Oostende for the Belgian region and maintains their turbines, that are located in the Belgian part of the North Sea (127 in total), from the port of Oostende.

      MHIVestas Offshore Wind is a joint venture between Vestas Wind Systems and Mitsubishi Heavy Industries. The company designs, manufactures and installs wind turbines for the offshore industry. MHIVestas Offshore Wind supplied wind turbines to almost 20 different offshore wind farms in Northern Europe. They are also responsible for the operation and maintenance of these turbines. To this end, they signed a cooperation agreement with DBB Jack-Up Services.

      DBB Jack-Up Services is based in Denmark and focuses on providing “service vessels” that perform maintenance works on offshore wind farms. Their jack up vessel WIND already replaced more than 370 major parts of turbines, making it the most experienced O & M jack-up vessel in the sector.

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        The marine environment possesses enviable qualities for the installation of wind turbines, with huge areas available for their erection and the possibility of installing offshore wind farms whose dimensions are appreciably larger than their land-based counterparts. Furthermore the sea, without the orographic obstacles that hinder or reduce the speed of the wind, favours the circulation of higher wind speeds and the reduction in environmental turbulence. This has a beneficial effect on the useful life of the wind turbine, decreasing fatigue and consequently increasing its life expectancy.

        If we think for a moment about the essential variables that determine the amount of energy that could be produced by a wind turbine: wind speed, blade diameter and air density, we can conclude that it is precisely in the marine environment where we can maximise this trio of variables. We can achieve higher wind speeds than on land, with an air density at sea level also greater than the air density of mountains or hills and, as space is not an issue, blade diameter can be augmented up to technologically-possible limits.

        The huge potential of the offshore environment for wind power, in conjunction with greater technological development of solutions for the manufacture, transport and installation of offshore wind turbines, underpin expectations for growth in this sector over the coming years.

        Article published in: FuturENERGY November-December 2014

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          The purpose of this analysis is to highlight the importance of the different factors that impact on the profitability of a wind turbine. This analysis has focused on the impact of the power converter and all the reliability data has been obtained from Ingeteam’s service records and their R&D expertise. This study is vital for offshore wind power (and other hard-to-reach sites) where maintenance access may be difficult or expensive.

          The hypothetical scenario is a 6 MW power stage with the rated power curve as shown in Figure 1. It has cut in and cut out wind speeds of 3 and 26 m/s respectively. The base site wind speed is understood as being 7 m/s (3,863 equivalent hours); the standard corrective period is taken as one month and the standard lifetime as 30 years.

          The price per MWh is understood as being $100 for the sake of simplicity.

          Article published in: FuturENERGY November-December 2014

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            For many years, the wind power sector has experienced an intensive maturing process based on the detection and correction (always after the event) of problems with the wind turbine’s large components such as the gearboxes or blades.

            The resultant financial impact was able to be supported thanks to a positive global economic situation and sector growth. However recent years have seen the emergence of a different situation with pressure on minimising the COE (Cost of Energy) greater than ever.

            In addition to this, there is a huge fleet of already installed wind power assets whose value requires upgrading and protecting to anticipate any possible problem associated to the turbines’ ageing process. In such a situation, an adequate Long-Term Operation (LTO) protocol is one of the keys to guaranteeing a proper IRR (Internal Rate of Return) on the wind power investment. Detecting the correct life, applying the most appropriate life extension strategies and identifying specific life management strategies form the axis for the LTO.

            Article published in: FuturENERGY September 2014

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            AREVA has selected Schneider Electric as its preferred supplier of power equipment for its offshore wind projects. This includes in particular the wind farm of 100 5MW turbines in the bay of Saint Brieuc off the coast of Brittany and the current tenders for the offshore wind farms at Le Tréport off the coast of Haute-Normandie and the islands of Yeu and Noirmoutier in Pays de la Loire (France).
            Developed as part of the offshore wind call for tender program launched by the French government in 2011, these wind farms will not only contribute to France meeting its targets laid down in the EU’s Climate and Energy Package, but also firmly establish a French sector of excellence for a promising technology.
            Under the terms of the agreement signed by the two groups, Schneider Electric will supply transformers and circuit breakers for AREVA’s wind farms. These components will be manufactured at two of Schneider Electric’s French industrial sites, located near Metz and Grenoble.
            According to Frédéric Abbal, Executive Vice President, Energy Business Schneider Electric’s Energy Business, “Schneider Electric is delighted to be designated as Areva’s preferred technology partner for their offshore wind projects. The combination of expertise offered by our two companies proves highly promising for the rapid establishment of a leading French sector of excellence in offshore wind”.
            Louis-François Durret, CEO of AREVA Renewables, said: “This agreement with Schneider Electric further underscores our commitment to developing a complete industrial sector in France, providing job creation opportunities and harnessing our local expertise.”

            SAJ Electric