ABB presents design alternatives for offshore wind power grids

2015-01-12 - ABB Power Consulting provided new insights dealing with the collection and integration of offshore wind power at a workshop in Berlin, Germany in November.

The 13th International Workshop on Large-Scale Integration of Wind Power into Power Systems as well as on Transmission Networks for Offshore Wind Power Plants is an international forum designed to stimulate interdisciplinary thinking between wind power and power transmission professionals.

It brings together electric utilities, renewable technology developers, project developers, power system operators, researchers and other power professionals to exchange knowledge and project experience relating to large-scale wind power integration and offshore wind power transmission networks.

In a section focusing on future offshore wind projects, ABB Power Consulting outlined conclusions from an ABB study that examines the electrical design of future offshore wind collecting grids at higher voltage levels (72 kV). The paper was presented to the workshop and is published in its proceedings.

Researched for ABB’s High Voltage Products business unit, the paper compares the technical and economic variables of two power collection concepts for off-shore wind farms. The traditional approach is to collect power from offshore wind turbines at an offshore substation platform, where voltage is stepped up and power transmitted to shore by submarine cable. This is compared to a distributed power collection scheme, in which individual turbine towers house switchgear, transformers and auxiliary equipment in a high voltage (72 kV) collection grid that enables power to be transmitted to shore without stepping up the voltage.

The study focuses on AC-connected wind farms with capacities of up to 600 megawatts (MW), and shows that distributed power collection schemes can significantly reduce capital expenditure and ease investment constraints by eliminating the need for a single large AC offshore substation platform. In addition, a distributed solution ensures the offshore collection and transmission grid can be developed step-wise as additional offshore wind turbines are installed over time.

    •   Cancel
      • Twitter
      • Facebook
      • LinkedIn
      • Weibo
      • Print
      • Email
    •   Cancel
    seitp202 565b0606b91f7973c1257dc600405ae5