Large scale offshore wind farms to be connected to the transmission network

The integration of wind energy is one of the major tasks for the transmission and distribution network. Large scale wind farms are often at remote places where the loads are low. Distributed smaller wind farms are spread over the area and insert their energy at the medium voltage level at 10 - 30 kV. In this paper the activities in Europe are explained and results from feasibility study to connect large scale offshore wind farms with several GW on energy are presented by using high power gas insulated transmission lines. Bulk power transmission in restricted areas, underground over long distances, with low transmission losses and no impact to neighbors is the task to solve.