2直驱式波浪发电系统的数学模型-电测与仪表.doc

第44卷 第504期 电测与仪表 Vol.44 No.504 2007年 第12期 Electrical Measurement Instrumentation Dec.2007 PAGE 1 - 傅氏分析反步法直驱型海浪发电系统功率优化控制* 蔡浩然1，杨俊华1，林巧梅1，杨金明2 （1. 广东工业大学 自动化学院，广州 510006；2. 华南理工大学 电力学院，广州 510640） 摘要：为研究波浪发电系统最大波浪能捕获问题，根据浮子的水动力方程和永磁同步直线电机的状态方程，建立了振荡浮子直驱式波浪发电系统的数学模型。提出等效电路图法模拟浮子的水动力模型。针对随机海浪波，采用傅里叶分析法将波浪发电系统分解为多个频率的正弦子系统，分别构造最大功率传输条件实现最大波浪能捕获，优化了传统的控制方法。采用反步法设计控制律，构造Lyapunov函数跟踪发电机状态。仿真结果表明，采用反步法可实现发电机状态的紧密跟踪。在随机波的条件下，所提傅氏分析法对传统算法的优化效果明显，提高了波能转换效率，结合反步法控制发电机可实现最大波浪能捕获，具有一定的实用性。 关键词：傅里叶分析；功率优化控制；反步法；直驱型海浪发电系统； 中图分类号：TM394.4；TP273 文献标识码：B 文章编号：1001-1390（2018）00-0000-00 An optimal control strategy for output power of directly driven wave generation system based on Fourier analysis back-stepping method Cai Haoran1, Yang Junhua1, Lin Qiaomei1, Yang Jinming 2 (1. School of Automation, Guangdong University of Technology, Guangzhou 510006, China. 2. School of Electric Power, South China University of Technology, Guangzhou 510641, China) Abstract：: In order to study the maximum wave energy capture of the wave power generation system, the model of the oscillating buoy direct-drive wave power system was built according to the hydrodynamic equation of the buoy and the state equations of the permanent magnet linear synchronous machine. An equivalent circuit method was proposed to simulate the hydrodynamic equation of the buoy. According to the random ocean wave, the wave power generation system was decomposed to into multiple sinusoidal sub-systems in each frequency by Fourier analysis method. The traditional control method was optimized by constructing the maximum power transmission condition for every subsystem to achieve the maximum wave energy capture. The control law was designed and the Lyapunov function was constructed by back-stepping method to track the operation state of generator closely. The simulation results show that the propose