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以杭州湾岱山海域某站点潮流观测数据为例,分析采用3种资料长度及3种评估方法对潮流能资源评估结果的影响。对比分析3种潮流能功率密度计算方法的计算结果,逐时计算取平均值的计算方法最为准确,但对资料长度和分辨率要求较高;流速分级计算方法适用范围最广,对数据时间分辨率没有要求,资料长度只要能反映出完整的潮周期即可;大、小潮最大流速评估方法由于引入太多近似,精度最低。分析3个月、1个月和全潮测验3天的潮流数据计算结果表明,1个月是基本要求,1个月以上最好,缺乏1个月数据时,3天(包含大、中、小潮)数据也可。如只有大、小潮2天潮流数据或只有大、小潮最大流速数据,一般不建议使用。
Taking a station tidal current observational data in Daishan, Hangzhou Bay as an example, the paper analyzes the influence of three kinds of data length and three kinds of assessment methods on tidal current energy resources assessment results. Comparing the calculation results of three tidal current power density calculation methods, it is most accurate to calculate the average value on a time-by-calculation basis, but the data length and resolution are more demanding. The calculation method of the flow rate classification is the most widely applicable, The rate is not required. The length of the data can reflect the complete tidal cycle. The method of evaluating the maximum and minimum tidal flow velocities has the lowest accuracy due to the introduction of too many approximations. Analysis of 3-month, 1-month and full-tidal 3-day tidal current data showed that 1 month was the basic requirement, more than 1 month was the best, 3 days (including large, Small tide) data is also available. If only the large and small tidal 2-day trend data or only the maximum and minimum tide flow rate data is generally not recommended.