摘要
为应对海洋复杂波浪环境,改善不规则激励力下直驱式波浪发电系统的功率捕获效果,降低参数变化影响,建立水动力和直线电机模型,采用线性二次型调节器方法设计系统状态反馈,通过控制代价方程中的权重矩阵,权衡系统输出功率、运动部件位移和速度三者之间的关系;计算理想电磁力,得到q轴期望电流跟踪值。根据系统摄动数学模型,将控制器设计问题转化为H∞鲁棒控制标准型问题,通过选取适当权函数求解控制器参数,增强系统抗干扰能力。仿真结果表明,在浮子位移和速度受限制情况下,当系统模型存在参数摄动时,所提控制策略系统输出功率更高、鲁棒性更强,可较好地应对复杂海况,提高波能转换效率。
In order to cope with the complex sea conditions,improve the power capture efficiency of the direct-drive wave energy conversion system under irregular wave excitation,and reduce the influence of parameter uncertainty on the system,the hydrodynamic model and linear motor model were established,and a linear quadratic regulator method was proposed to design the system state feedback.The weight matrices were used to weigh the relationships between the system output power,the displacement and speed of the moving parts,and then the ideal electromagnetic force was calculated,so that the q-axis expected current could be obtained.According to the system perturbation mathematical model,the design of the controller was converted into standard H∞optimization problem,and the controller parameters were obtained by selecting the appropriate weight function to enhance the anti-interference of the system.The simulation results show that the proposed control strategy has higher output power and stronger robustness than PI control when the system model exists perturbations under the condition of constrained float displacement and speed,which can better cope with complex sea conditions,improve wave energy conversion efficiency.
作者
王超凡
杨俊华
罗琦
梁昊晖
黄逸
Wang Chaofan;Yang Junhua;Luo Qi;Liang Haohui;Huang Yi(School of Automation,Guangdong University of Technology,Guangzhou 510006,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2023年第8期550-555,共6页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51370265)
广东省教育部产学研合作专项资金(2013B090500089)
广东省自然科学基金(2018A030313010)
广州市科技计划(202102021135)。
关键词
波能转换
波浪能
优化控制
永磁同步直线电机
线性二次型调节器
H∞控制
wave energy conversion
wave power
optimal control
permanent magnet synchronous linear motor
linear quadratic regulator
H∞control
作者简介
通信作者:杨俊华(1965-),男,博士、教授,主要从事新能源发电及其电机控制方面的研究。yly93@gdut.edu.cn。
