POWER OPTIMIZATION OF DIRECT-DRIVE WAVE POWER SYSTEM BASED ON VARIATIONAL METHOD FOR LOSS REDUCTION

Lin Bingjun; Yang Junhua; Lin Huijin; Liang Huigai; Wu Fantong; Qiu Dalei

doi:10.19912/j.0254-0096.tynxb.2022-1065

PDF(2192 KB)

Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (3) : 186-192. DOI: 10.19912/j.0254-0096.tynxb.2022-1065

POWER OPTIMIZATION OF DIRECT-DRIVE WAVE POWER SYSTEM BASED ON VARIATIONAL METHOD FOR LOSS REDUCTION

Lin Bingjun¹, Yang Junhua¹, Lin Huijin², Liang Huigai¹, Wu Fantong¹, Qiu Dalei¹

Author information +

History +

Abstract

Aimed at improve the output power of the direct-drive wave power system under irregular excitation force, improve the capturing ability of wave energy and reduce the main loss of the system, combining the motor and hydrodynamic equations to build the mathematical model of the direct-drive wave power system. The energy functional was constructed based on the Variational method, and the optimal control law was obtained after solving the extreme value of the functional. Designing the Extended Kalman filter observer to observe the dependent state variables which are difficultly obtained by the system, and the coefficient of the penalty term of the functional is adjusted off-line to obtain the ideal reference current without increasing the overall computational burden. The Field Oriented control strategy is applied to track the ideal reference current, and the relationship between electrostatic force constraint and power capture is considered. The simulation results show that the proposed strategy has fast response and high observation accuracy, which can validly add the power capture capability, decrease the main loss of the system and add the output power.

Key words

wave power / losses / wave energy conversion / the Variational method / power harvesting

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

Lin Bingjun, Yang Junhua, Lin Huijin, Liang Huigai, Wu Fantong, Qiu Dalei. POWER OPTIMIZATION OF DIRECT-DRIVE WAVE POWER SYSTEM BASED ON VARIATIONAL METHOD FOR LOSS REDUCTION[J]. Acta Energiae Solaris Sinica. 2024, 45(3): 186-192 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1065

References

[1] 刘春元, 余海涛, 胡敏强, 等. 永磁直线发电机在直驱式波浪发电系统的应用[J]. 中国电机工程学报, 2013, 33(21): 90-98, 197.
LIU C Y, YU H T, HU M Q, et al.Application of permanent magnet tubular linear generators using direct-driver wave power generation take-off systems[J]. Proceedings of the CSEE, 2013, 33(21): 90-98, 197.
[2] GIORGI G, SIRIGU S A.Optimization and energy maximizing control systems for wave energy converters[J]. Journal of marine science and engineering, 2021, 9(12): 1436.
[3] 刘华兵, 彭爱武, 赵凌志. 波浪发电系统功率控制方法综述[J]. 电工电能新技术, 2020, 39(5): 49-58.
LIU H B, PENG A W, ZHAO L Z.Summary of power control methods for wave power generation system[J]. Advanced technology of electrical engineering and energy, 2020, 39(5): 49-58.
[4] 张亚群, 盛松伟, 游亚戈, 等. 波浪能发电技术应用发展现状及方向[J]. 新能源进展, 2019, 7(4): 374-378.
ZHANG Y Q, SHENG S W, YOU Y G, et al.Development status and application direction of wave energy generation technology[J]. Advances in new and renewable energy, 2019, 7(4): 374-378.
[5] KRISHNA R, SVENSSON O, RAHM M, et al.Analysis of linear wave power generator model with real sea experimental results[J]. IET renewable power generation, 2013, 7(5): 574-581.
[6] 黄磊, 胡敏强, 余海涛, 等. 直驱式波浪发电用全超导初级励磁直线发电机的设计与分析[J]. 电工技术学报, 2015, 30(2): 80-86.
HUANG L, HU M Q, YU H T, et al.Design and analysis of a fully-superconducting primary-excitation linear generator for direct-driven wave energy generation[J]. Transactions of China Electrotechnical Society, 2015, 30(2): 80-86.
[7] AHAMED R, MCKEE K, HOWARD I.Advancements of wave energy converters based on power take off(PTO) systems: a review[J]. Ocean engineering, 2020, 204: 107248.
[8] 肖晓龙, 肖龙飞, 杨立军. 串联直驱浮子式波浪能发电装置能量捕获研究[J]. 太阳能学报, 2018, 39(2): 398-405.
XIAO X L, XIAO L F, YANG L J.Energy harvesting study of series direct driven float wave energy converter[J]. Acta energiae solaris sinica, 2018, 39(2): 398-405.
[9] 黄宝洲, 杨俊华, 沈辉, 等. 波浪发电系统无速度传感器功率优化控制[J]. 智慧电力, 2019, 47(1): 34-40.
HUANG B Z, YANG J H, SHEN H, et al.Power optimization control of speed sensorless for wave power generation system[J]. Smart power, 2019, 47(1): 34-40.
[10] BABARIT A, CLÉMENT A H. Optimal latching control of a wave energy device in regular and irregular waves[J]. Applied ocean research, 2006, 28(2): 77-91.
[11] 陈海峰, 杨俊华, 沈辉, 等. 基于主频预估的波浪发电系统自适应滑模控制[J]. 计算机仿真, 2020, 37(3): 94-99.
CHEN H F, YANG J H, SHEN H, et al.Adaptive sliding mode control of wave power generation system based on dominant frequency estimation[J]. Computer simulation, 2020, 37(3): 94-99.
[12] 邹子君, 杨俊华, 杨金明, 等. 基于人工鱼群算法的波浪发电系统最优负载[J]. 电测与仪表, 2018, 55(17): 21-26.
ZOU Z J, YANG J H, YANG J M, et al.Optimal load of wave power generation system based on artificial fish swarm algorithm[J]. Electrical measurement & instrumentation, 2018, 55(17): 21-26.
[13] KRISTIANSEN E, HJULSTAD Å, EGELAND O.State-space representation of radiation forces in time-domain vessel models[J]. Ocean engineering, 2005, 32(17/18): 2195-2216.
[14] DAVIS A F, FABIEN B C.Wave excitation force prediction of a heaving wave energy converter[J]. IEEE journal of oceanic engineering, 2021, 46(2): 564-572.
[15] HUANG X R, SUN K, XIAO X.A neural network-based power control method for direct-drive wave energy converters in irregular waves[J]. IEEE transactions on sustainable energy, 2020, 11(4): 2962-2971.
[16] 夏长亮, 李帆, 王慧敏, 等. 基于铁耗在线计算的最小损耗预测电流控制方法[J]. 中国电机工程学报, 2018, 38(1): 266-274, 364.
XIA C L, LI F, WANG H M, et al.Loss minimization predictive current control based on iron loss on-line calculation[J]. Proceedings of the CSEE, 2018, 38(1): 266-274, 364.
[17] 朱瑛, 程明, 花为, 等. 考虑损耗转矩的风力发电系统最大风能跟踪控制[J]. 中国电机工程学报, 2013, 33(19): 39-46, 21.
ZHU Y, CHENG M, HUA W, et al.Maximum power point tracking control for wind energy conversion systems considering loss torque[J]. Proceedings of the CSEE, 2013, 33(19): 39-46, 21.
[18] 许利通, 程明, 魏新迟, 等. 考虑损耗的无刷双馈风力发电系统功率反馈法最大功率点跟踪控制[J]. 电工技术学报, 2020, 35(3): 472-480.
XU L T, CHENG M, WEI X C, et al.Power signal feedback control of maximum power point tracking control for brushless doubly-fed wind power generation system considering loss[J]. Transactions of China Electrotechnical Society, 2020, 35(3): 472-480.
[19] 赵勇, 冯延晖, 邱颖宁. 一种考虑损耗的风电系统MPPT控制方法研究[J]. 太阳能学报, 2018, 39(11): 3239-3244.
ZHAO Y, FENG Y H, QIU Y N.Research on a mppt control method for wind power system considering loss[J]. Acta energiae solaris sinica, 2018, 39(11): 3239-3244.
[20] ELSONBATY N A, ENANY M A, DIAB A M.Proposed control policy for high power transfer capability DFIG[J]. Electric power systems research, 2018, 155: 144-152.
[21] 卢思灵, 杨俊华, 沈辉, 等. 直驱式波浪发电系统的经济模型预测控制[J]. 电测与仪表, 2021, 58(3): 131-138.
LU S L, YANG J H, SHEN H, et al.Economic model predictive control of direct-drive wave power generation systems[J]. Electrical measurement & instrumentation, 2021, 58(3): 131-138.
[22] YETKIN M, KALIDOSS S, CURTIS F E, et al.Practical optimal control of a wave-energy converter in regular wave environments[J]. Renewable energy, 2021, 171: 1382-1394.
[23] 林汇金, 杨俊华, 黄逸, 等. 基于参考模型补偿的波浪发电功率优化控制[J]. 太阳能学报, 2023, 44(6): 8-14.
LIN H J, YANG J H, HUANG Y, et al.Optimal control of wave energy generating power based on reference model compensation[J]. Acta energiae solaris sinica, 2023, 44(6): 8-14.
[24] 程正顺. 浮子式波浪能转换装置机理的频域及时域研究[D]. 上海: 上海交通大学, 2013.
CHENG Z S.Study on mechanism of floating wave energy conversion device in frequency domain and time domain[D]. Shanghai: Shanghai Jiao Tong University, 2013.