海上风电升压站平台高程确定标准的合理性研究

为保证海上风电升压电站建设的经济合理与安全可靠,合理确定海上风电升压电站平台高程十分必要。文中从波浪与潮位的遭遇组合、最大波高取值与现行相关标准的比较、最大波峰高度计算的合理性等方面,全面分析了确定海上风电升压站平台高程各组成项取值标准的合理性,研究认为现行标准明显偏高。建议海上升压站平台底部高程按"100年一遇极端高水位+重现期50年波列累积频率1%的最大波峰高度+安全超高"确定。结合工程实例计算分析,按本文建议可使海上升压站平台高程明显降低,从而节省工程造价,还可减轻升压站工程对周边风机的遮蔽影响,以达到多发电量的效果。

Study on the Rationality of Platform Elevation Standard for Offshore Wind Farm Substation

In order to ensure the economic, reasonable and safe construction of offshore wind farm substation, it is necessary to reasonably determine the platform elevation of offshore wind farm substation. From the aspects of the combination of wave and tide level, the comparison of maximum wave height with current relevant standards and the rationality of calculating maximum wave peak height, the rationality of determining each component of platform elevation of offshore wind farm substation is comprehensively analyzed. The research shows that the current standard is fairly high. It is suggested that the platform bottom elevation of offshore substation should be determined according to "extreme high water level once in 100 years + maximum peak height of 1% cumulative frequency of wave train in 50 years of recurrence period + safe super height". According to the suggestion in this paper, the platform elevation of offshore substation can be decreased obviously and engineering cost can be saved. Meanwhile, the shielding effect of substation on surrounding fans is also reduced, which can result in increasing power generation.