中文摘要：

与陆上风电场相比,海上风电场运行条件恶劣,维修困难,对电气系统的可靠性要求更高。沿用常规的可靠性分析方法,仅仅考虑设备电气故障并不能完全反映海上风电场的可靠性水平。提出了一种考虑风资源约束的双天气模态风力发电机可靠性模型,利用基于邻接终点矩阵的最小路集/割集算法完成了从风电机组到集电系统、海上汇集站、输电线缆、岸上变电站的海上风电系统全环节可靠性评估。算例分析表明,风资源约束对海上风电场可靠性的影响要大于电气元件故障的影响,而正常/恶劣的双天气模态更利于精确刻画海上风电系统的可靠性特性。

英文摘要：

Comparing with onshore wind farms, offshore wind farms require even higher reliability due to adverse operating conditions and difficulties of maintenance. Just for the same reason, if typical reliability evaluation method is directly applied, in which only electrical component random failure is modeled without any parameter modification to reflect effect of wind resource and weather condition, the result can＇t correctly indicate reliability level of offshore wind farms. This paper proposed a wind turbine reliability model under double weather patterns considering wind resource constraints. Adopting minimal path set/cut set method based on adjacency-terminal matrix, the paper accomplished reliability analysis of offshore wind power system covering full chains of wind turbines, collection system, offshore substation, transmission system and onshore substation. Case study was carried out and results demonstrates that the effect of wind resources constraints on reliability of offshore wind farm electrical system is greater than impact of component random failure during operation, and it＇s a better way to characterize the reliability model of offshore wind power system with two different parameters in normal and adverse weather conditions.