海上风电场集群接入系统组网优化

Optimization of Grid Integration Network for Offshore Wind Farm Cluster

当前海上风电发展表现出规模化、集群化的特点,海上风电场集群接入系统需求显著。但是,现有海上风电场电气系统相关研究都是基于单个风电场,场内风机位置相对集中、海上变电站数量有限,且未考虑其接入对陆上输电网规划的影响。这可能导致海缆拥挤,海域资源浪费,以及陆上电网扩建不合理等一系列问题。对此,提出基于公共站设计与公共电网设计的2种海上风电场集群接入系统的优化方法,建立统一的数学模型。针对传统聚类方法在海上变电站选址定容上存在的问题,该文提出一种改进FSDP算法,进行包含变电站选址定容与电网拓扑规划的接入系统二层优化。算例结果显示,公共电网模式整体经济性最佳,公共站模式海域资源占用最少。

The current offshore wind power development has the characteristics of large-scale and clustering, and the demand of offshore wind farm cluster integrating into grid is significant. However, existing related researches to electrical system of offshore wind farm were mostly based on single wind farm, in which location of wind turbines are relatively concentrated, and there is a limit on offshore substation＇s number. These researches seldom consider the impact of the onshore transmission planning. That may lead to a series of problems such as submarine crowded, waste of sea resources and onshore grid unreasonable expansion. In this paper, based on the design of public station and public grid, 2 kinds of optimization methods of offshore wind farm cluster integration system were put forward and a unified mathematical model was established. Aiming at the existing problems of the traditional clustering method in offshore substation＇s locating and sizing, this paper proposed an improved FSDP algorithm. A bi-level programming was put forward, which includes substation＇s optimization and grid topology planning. The results show that public grid mode had the best overall economic efficiency, and the public station mode occupied the least sea resources.