2017-11-24
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Wind Energy Keyword: "DolWin gamma"

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    TenneT and GE install converter platform DolWin gamma 07/11/2017
    ...TenneT and GE install converter platform DolWin gamma TenneT and GE have successfully installed the offshore converter platform DolWin gamma about 80 kilometers off the coast in the southwestern part of the German North Sea. TenneT, GE, converter, DolWin gamma, wind farm, Germany, grid Two wind farms, which will be able to supply clean energy to more than one million households in Germany, will be connected to the German transmission grid. The converter platform left Warnemünde in Mecklenburg-Vorpommern on 15 June and started a six-day trip along the German and Danish coast to finally reach its destination. There, the installatio n had to wait until the weather was finally good enough to install the platform on the already finished jacket. "The converter platform is one of the largest visible indicators for the German energy market. Projects like DolWin3 are essential to provide power to households in the north and to make renewable energy a reality," said Wilfried Breuer, a member of the TenneT management team.     ...
  • DeepOcean awarded export cable installation contract by NSW for the Merkur Offshore Wind Farm in Germany 06/29/2017
    ... substation and the DolWin gamma converter platform. The designated export cable connection will comprise of two parallel 150kV rated HVAC cables. One... with the transportation, installation and burial of the HVAC cables from the DolWin gamma converter platform towards the Merkur offshore substation. In addition...
  • Newlist_logo.pfisterer
    Germany: New cable connection between offshore platforms 05/18/2016
    ... is planned by 2017. In the southwestern area of the North Sea, the DolWin gamma converter platform with a capacity of 900 MW is currently being... actively promoted with DolWin gamma. To be able to switch over between the converter stations when necessary, the two sister platforms – DolWin gamma and DolWin alpha – are sited close together 80 kilometers offshore and linked by means of a bridge with a powerful high-voltage cable. Unique offshore cable routing Pfisterer will lay all the high-voltage and medium-voltage cable systems within the platform, as well as the cables on the connecting bridge. This major contract with a value of almost six million euros is being carried out as a turnkey project. The configuration also includes a feasibility study, including dimensioning and calculation of current carrying capacity. “One particular challenge is laying the 4.5-kilometer-long, high-flexibility Feltoflex HV cable. For this purpose, we have developed an extraordinary concept. The cable is routed from the upper deck of the DolWin alpha platform at a height of 35 meters by means of a rising ladder rack and a bridge of about 30 meters in length, to the DolWin gamma platform,” explains Vukasin Basara, Project Manager for HV Cable Projects at Pfisterer. High flexibility in rough seas The connection between the platforms by means of a highly flexible 155 kV Feltoflex cable will have an overall length of 250 meters and therefore be the world's longest connection between two offshore platforms. The cable, comprising approximately 4,000 individual strands of wire, is insulated with a special mixture of high modulus ethylene propylene rubber (HEPR) instead of cross-linked polyethylene (VPE). The increased flexibility of this cable is a definite advantage in high winds. This allows the platforms to move by up to 800 mm relative to each other, without causing any mechanical damage to the cable. Tested and safe To ensure the construction of a cable connection with a power rating of 155 kV and the extraordinarily large cross section of 800 mm2 was possible in the first place, Pfisterer was included at the project development stage back in 2011. In the course of prequalification, the company conducted numerous preliminary investigations for its solid-insulated CONNEX pluggable connection system. This successfully passed the contact aging test according to ICE 61238-1, as well as the electrical tests specified in IEC 60840 Section 12.4. MV installation started The platform is currently being constructed in the dockyard at Rostock-Warnemünde. The start of the onshore installation work in the medium-voltage range also marks the start of the execution phase for Pfisterer. The internal cable connections between the switchgear and the transformers will first be installed with MV cable, including the connections to the joint compartments with HV cable, before the offshore cabling stage. In the next stage the 4,500-meter-long HV cables will then be installed, as well as the CONNEX connection system and CONNEX HV joints in various sizes. “The DolWin3 order is consolidating our position as the leading manufacturer of cable assemblies in the offshore wind energy sector, as well as our expertise and ability to offer complete integrated systems," explains Eduardo Santana, Director Sales Cable Accessories & Systems at Pfisterer. ...
  • Start of construction for DolWin gamma offshore converter platform 10/15/2014
    ...The construction works of the DolWin gamma offshore converter platform started today, 9 October, at Nordic Yards in Warnemünde. This was marked... part of the North Sea, DolWin gamma will convert 900 MW of electricity from AC to DC and transmit it to the Dörpen onshore converter station via...

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