基于直接推力控制的直驱波浪发电系统功率优化  

POWER OPTIMIZATION OF DIRECT-DRIVE WAVE POWER SYSTEM BASED ON DIRECT THRUST FORCE CONTROL

作　　者：黄逸 杨俊华[1] 梁昊晖 罗琦 王超凡 Huang Yi;Yang Junhua;Liang Haohui;Luo Qi;Wang Chaofan(School of Automation,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学自动化学院,广州510006

出　　处：《太阳能学报》2024年第2期206-212,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(62173148);广东省自然科学基金(2022A1515010150,2023A1515010184);广东省基础与应用基础研究基金(2022A1515240026)。

摘　　要：为提升系统波能捕获能力,分析浮子受力,以状态空间法近似拟合辐射力,建立直驱式波浪发电系统数学模型。基于最优控制理论,以系统捕获波能为目标函数,在S域求解Hamilton方程,计算奇异最优控制率,经拉氏逆变换后得到理想电磁力信号。结合直接推力控制,设计二阶滑模控制方案,保证电机推力与初级磁链的跟踪效果。仿真结果表明,所提最优功率方案下系统捕获功率高,滑模控制器跟踪误差小、动态性能好,可提高波能转化率,有效降低推力与初级磁链脉动,增强系统鲁棒性。In order to improve wave energy capture capability of the system and analyze the force on the float,approximately fitting the radiation force by the state-space method,the mathematical model of direct-drive wave power system was established.Taking the captured wave energy of the system as the objective function,and solving Hamilton's equation in the S domain based on the optimal control theory,the singular optimal control rate was calculated,and the ideal electromagnetic force signal was obtained by inverse Laplace transform.Aimed at ensuring the tracking effect of the thrust force and primary flux,combined with direct thrust force control,a second order sliding mode control scheme was designed to ensure the tracking effect of the thrust force and primary flux.The results show that the proposed optimal power scheme has high capture efficiency,the proposed controller has small tracking error and good dynamic performance.It can improve the wave energy conversion rate,effectively reduce the thrust force and primary flux impulse,and optimize the system output power.

关 键 词：波浪能 波浪能转换 最大功率点跟踪 最优控制 直接推力控制 

分 类 号：TM619[电气工程—电力系统及自动化] P743.2[天文地球—海洋科学]