摘要
针对复杂工况下运行的直驱式波浪发电系统,考虑模型不匹配,设计滑模观测器在线检测建模误差;应用系统辨识技术进行误差拟合,减少在线计算量;随后将传递函数转为状态空间,建立更精确的水动力方程以设计后续策略,降低模型失配影响;基于变分法构造能量泛函,求解泛函极值获得最优控制律,经滤波估计系统运动速度,采用空间矢量脉冲宽度调制技术跟踪控制理想电流,提高发电系统功率捕获能力。仿真结果表明,所提方案动态性能好、鲁棒性强、观测精度高,可有效提高系统存在建模误差时的波能捕获能力,输出能量增加,输出平均功率提升。
Aiming at the operation of direct drive wave power system under complex working environment,the model mismatch is fully considered,a sliding mode observer is designed to detect the modeling error online,and the system identification technique is applied to fit it,and reduce the amount of online computation.The transfer function was converted into state space,and more accurate hydrodynamic equations were established to design subsequent strategies and reduce the influence of model mismatch;Based on the Variational method,the energy functional is constructed,and the optimal control law is obtained after solving the extreme value of the functional,the velocity of the system is obtained by filtering estimation and the ideal current is tracked and controlled by the Space vector pulse width modulation(SVPWM)to improve the power capture ability of the power generation system;The simulation results show that the proposed scheme has good dynamic performance,strong robustness and high observation accuracy,which can effectively improve the wave energy capture ability of the system with modeling errors,increase the output energy and increase the average output power.
作者
林炳骏
杨俊华
黄逸
邱达磊
吴凡曈
梁惠溉
Lin Bingjun;Yang Junhua;Huang Yi;Qiu Dalei;Wu Fantong;Liang Huigai(School of Automation,Guangdong University of Technology,Guangzhou 510006,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2024年第7期135-142,共8页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51370265)
广东省自然科学基金(2018A030313010)
广州市科技计划(202102021135)。
关键词
波浪能
误差检测
波浪能转换
永磁同步直线电机
wave power
error detection
wave energy conversion
permanent magnet synchronous linear machine
