基于ADAMS的鹰式波浪能发电装置PTO系统优化设计

Optimal PTO Design of Sharp Eagle Wave Energy Converter Based on ADAMS

波浪能发电装置的PTO(Power Take Off,动力输出)系统对发电效率有重要影响。该文以鹰式波浪能发电装置为研究对象,基于线性势流理论在频域内求解了波能装置的多体水动力系数和给定海况下吸波体波浪诱导载荷,采用间接时域法求得吸波体的时域运动响应。在ADAMS框架中建立鹰式装置液压PTO系统的参数化模型,以液压缸的安装位置和PTO系统阻尼系数作为设计变量,PTO系统平均功率为目标函数,实现对液压PTO系统能量转换效率的目标优化。通过全参数优化,装置在中国南海海域中等海况和低海况下,较之原型机俘获宽度比均有大幅提高,中等海况和低海况下的平均俘获宽度分别提高了6.748%和12.816%。这为波浪能发电装置液压PTO优化设计提供了一种高效可行的数值方法。

PTO(Power Take Off)system of wave energy converter has an important influence on power generation efficiency.In this paper,the PTO system of“Sharp Eagle”wave energy converter is studied.Based on the linear potential flow theory,the multi-body hydrodynamic coefficients of the wave energy converter and the wave induced load of the absorber under given sea conditions are solved in the frequency domain,and the time domain motion response of the floating body is obtained by using the indirect time domain method.A parametric model of hydraulic PTO system of Eagle device is established based on ADAMS.The installation position of hydraulic cylinder and the damping coefficient of PTO system are taken as the design variables,and the maximum average power of PTO system is taken as the objective function to optimize the energy conversion efficiency of hydraulic PTO system.Through full parameter optimization,the capture width ratio significantly increases compared to the prototype under moderate and slight sea conditions in the South China Sea.The average capture width increases by 6.748%and 12.816%under moderate and slight sea conditions,respectively.This provides an efficient and feasible numerical method for the optimization design of hydraulic PTO in wave energy power generation devices.