A Static Optimization Method to Determine Integrated Power Transmission Capacity of Clustering Wind Farms

As some wind energy enriched regions are away from load centers,especially in the North China,it is necessary to connect clustering wind farms into the main grid with high-voltage transmission lines.So the primary issue is to rationally determine transmission capacity of the transmission line.This paper presented a static optimization method for transmission capacity determination considering the low energy density characteristics of wind generation.In order to maximize the comprehensive benefits of the transmission project,the following factors have been taken into account such as the transmission benefit,transmission constructing costs as well as the congestion loss probably caused by a low transmission capacity.Example shows that the proposed method can achieve optimal transmission project benefit than the traditional one based on the total installed capacity.Meanwhile,the proposed method is an effective tool to determine transmission capacity for incorporating some 10 GW-class wind farms into main grid.