DOUBLE-SIDED RING TOPOLOGY FOR OFFSHORE WIND FRAM COLLECTOR SYSTEM LAYOUT: A MULTI-CABLE APPLICATION

摘要

Owing to the benefit of high reliability, the double-sided ring topology has been widely applied in the collector system layout for large-scale offshore wind farms (OWF). However, such design also shows the drawback in economic efficiency as the ring topology requires longer cable distances compared with other designs, such as the radial topology. This paper introduces the multi-cable application for the double-sided ring topology, which achieves improved economic efficiency with the consideration of both cable and power loss costs. It begins with the Particle Swarm Optimization (PSO) to locate the substation with smallest distances to wind turbines. This is followed by the modified Two-Phase Clark and Wright's saving algorithm to divide and connect turbine clusters using cables with various current ratings, and the optimal solution is selected among different cluster sizes. The proposed multi-cable design is tested and compared with traditional double-sided ring topology and the results verify that using cables with various ratings enhances the economic efficiency of collector system planning.