基于模糊滑模控制的直驱式波浪发电装置最大功率控制方法  

Method for Maximum Power Control of Direct-drive Wave Power Device Based on Fuzzy Sliding Mode Control

作　　者：范新宇 孟昊 FAN Xinyu;MENG Hao(School of Energy and Power,Jiangsu University of Science and Technology,Zhenjiang 212100,China)

机构地区：[1]江苏科技大学能源与动力学院,江苏镇江212100

出　　处：《水下无人系统学报》2024年第1期48-56,共9页Journal of Unmanned Undersea Systems

基　　金：国家自然科学基金青年项目(52205271).

摘　　要：海洋波浪能是一种新型清洁能源,为提高直驱式波浪发电系统的发电功率和波浪能转换效率,针对目前普遍使用的比例-积分-微分(PID)控制方法存在输出纹波较大、系统稳定性较差的问题,提出基于模糊滑模控制的最大功率控制方法,根据运行状态实时调整趋近律参数,在实现最大功率跟踪的同时削弱输出纹波,减小跟踪误差,提高系统控制品质。文中以永磁直线发电机(PMLG)作为发电装置,建立系统动力学模型,并通过快速傅里叶变换方法预估不规则波浪主频,设计满足最大功率策略的期望电流跟踪曲线;在此基础上,将常规PID、滑模控制方法与所提出的模糊滑模最大功率控制方法进行仿真对比,结果表明:模糊滑模控制方法在功率上有所提升且具有更好的准确性和稳定性。Marine wave energy is a new type of clean energy.In order to improve the generation power and wave energy conversion efficiency of the direct-drive wave power generation system,a maximum power control method based on fuzzy sliding mode control was proposed.The method aimed at solving the problems of large output ripple and poor system stability of the commonly used proportional-integral-derivative(PID)control method.In addition,the reaching law parameters were adjusted in real time according to the running state.At the same time,while realizing maximum power tracking,the output ripple was weakened;the tracking error was reduced,and the control quality of the system was improved.In this paper,the permanent magnet linear generator was used as the power generation device,and a system dynamics model was established.The main frequency of irregular waves was estimated by fast Fourier transform(FFT),and the expected current tracking curve was designed to meet the maximum power strategy.On this basis,the conventional PID and sliding mode control methods were compared with the proposed fuzzy sliding mode maximum power control method.The results show that the fuzzy sliding mode control method has improved power and shown better accuracy and stability.

关 键 词：直驱式波浪发电系统 永磁直线发电机 最大功率 模糊滑模控制 

分 类 号：TJ630.2[兵器科学与技术—武器系统与运用工程] U664.1[交通运输工程—船舶及航道工程]