中文摘要：

为了在规划阶段做好海上风电场集电系统的可靠性评估,避免可及性差导致的维护困难,提出将概率性方法与确定性方法结合的可用率等值计算方法。首先根据大规模海上集电系统的特点将其划分为变电站层、风机层、电缆层,通过故障树算法对环形集电系统的可用率进行分层描述;然后根据环形结构可能出现的运行状态,分别计算单串环网的可用率;最后以某规划中的海上风电场为例对其集电系统的可靠性与经济性这对矛盾指标进行对比分析,实现集电系统不同拓扑方案的优劣比较,为海上风电场集电系统的拓扑规划提供量化的参考指标。

英文摘要：

In order to evaluate the reliability of a collector system of an offshore wind farm in the planning stage and to avoid maintenance difficulties caused by the poor accessibility, a method for calculating equivalent availability is proposed combining the probabilistic and deterministic methods. First, according to the characteristics of the large- scale offshore collector system, it can be divided into a substation layer, turbine layer, and cable layer, and the availability of each layer of the ring collector system is described using the fault tree algorithm. Second, according to the possible operation state of the ring structure, the availability of a single-string ring network is calculated. Finally, using a planning offshore wind farm as an example, the reliability and economy of the collector system are compared and analyzed, and different topological schemes of the collector system are also compared, providing quantitative reference indices for topological planning of the collector system of an offshore wind farm.