基于时域模型的一种新的波浪能计算方法

A New Method for Calculating Wave Power Based on Time Domain Model

针对波浪能站点的输入能量计算,提出了一种基于时域模型的方法.采用SWASH模型得到波浪能站点的时序列波浪条件,通过计算时序列波列中每一个波的能量,叠加得到该波列的总波浪能.选取成山头海上试验场2个近岸点和1个深水点作为计算站点,分别采用频域方法和时域方法对各点的输入波浪能量进行计算.结果表明,在深水和近岸站点,频域方法都得到了偏大的输入波能值,而时域方法计算得到的短期输入能量被认为更接近真实值,同时该方法也提供了一种检测波浪能发电装置实时发电效率的思路.

For calculating a specific site＇s incident wave energy, the time domain method is proposed. Time series dataof wave parameters is obtained from wave model SWASH to calculate the total wave energy by summarizing eachwave＇s energy. Three sites including two nearshore sites and one deepwater site at Chengshantou sea area are selected,frequency domain method and time domain method are applied to calculate the incoming wave energy. The resultsshow that the frequency method is very likely to overestimate the wave power at both nearshore and deepwater sites,while the time domain method is believed to be more superior in calculating the incident wave power in a short term,and it may serve as a new method of calculating the incident wave power of wave energy converter in order to evaluateits real-time efficiency.