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

被引：0
|
作者：
Huang Y. [1 ]
Yang J. [1 ]
Liang H. [1 ]
Luo Q. [1 ]
Wang C. [1 ]
机构：
[1] School of Automation, Guangdong University of Technology, Guangzhou
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2024年 / 45卷 / 02期
关键词：
direct thrust force control; maximum power point track; optimal control; wave energy conversion; wave power;
D O I：
10.19912/j.0254-0096.tynxb.2022-1080
中图分类号：
学科分类号：
摘要：
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鸳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. © 2024 Science Press. All rights reserved.
引用
收藏
页码：206 / 212
页数：6
相关论文
共 19 条
  • [11] ZHANG Y, LI G., Non-causal linear optimal control with adaptive sliding mode observer for multi-body wave energy converters［J］, IEEE transactions on sustainable energy, 12, 1, pp. 568-577, (2021)
  • [12] WANG H X, SI J K., Study on direct force control for PMLSM［J］, Micromotors, 45, 5, pp. 26-30, (2012)
  • [13] ZHANG H W, WANG X H, CHEN K B., Twelve- section direct thrust force force control for permanent magnet linear synchronous motor［J］, Control engineering of China, 26, 4, pp. 729-734, (2019)
  • [14] ZHAO W X, Et al., Modified flux linkage observer for sensorless direct thrust force control of linear vernier permanent magnet motor［J］, IEEE transactions on power electronics, 34, 8, pp. 7800-7811, (2019)
  • [15] ALI MASOOD CHEEMA M，, FLETCHER J E，, FARSHADNIA M，, Et al., Combined speed and direct thrust force control of linear permanent- magnet synchronous motors with sensorless speed estimation using a sliding-mode control with integral action［J］, IEEE transactions on industrial electronics, 64, 5, pp. 3489-3501, (2017)
  • [16] CHENG Z S, YANG J M，, HU Z Q，, Et al., Frequency/time domain modeling of a direct drive point absorber wave energy converter［J］, Science China physics，mechanics and astronomy, 57, 2, pp. 311-320, (2014)
  • [17] LEVANT A., Principles of 2-sliding mode design［J］, Automatica, 43, 4, pp. 576-586, (2007)
  • [18] YU Z，, FALNES J., State- space modelling of a vertical cylinder in heave［J］, Applied ocean research, 17, 5, pp. 265-275, (1995)
  • [19] GONG B., Research on the key technologies of oscillating buoy wave power generation system［D］, (2015)
12