水平轴潮流电站系泊特性分析

The Mooring Characteristic Analysis of Horizontal Axis Tidal Current Power Station

潮流电站是开发海洋能发电走向商业化和规模化的重要方式。本文以三维频域势流理论为基础,运用双体船载体模型,分析300 kW的水平轴潮流电站在不同流速和水深的条件下系泊系统随时间的位移和系泊线张力;鉴于潮流电站受到风,浪,流三重强载荷的影响,系泊线增加了非线弹性索成分,使用AQWA-DRIFT模块进行时域计算,校核其六自由度运动的情况和运动变化的范围,通过系泊线的张力的最值和张力的变化曲线,运用最小二乘法得到张力随水深和流速变化的经验公式。

Tidal Current Power Station is an important way to commercialize and scale the development of offshore power generation.Based on the three-dimensional potential flow theory in frequency domain,the catamaran carrier model is used in this paper,The time-dependent displacement of mooring system and tension of mooring line for 300 kW horizontal-axis tidal power station under different flow velocities and water depths are analyzed.In view of the influence of three strong loads of wind,wave and current on tidal power station,the mooring line has added the non-linear elastic cable component.AQWA-DRIFT module is used for time domain calculation to verify the six-degree-of-freedom motion and the range of motion variation.The empirical formula of tension varying with water depth and velocity is obtained by the leas t square method through the maximum tension and tension curve of mooring line.