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Control and Optimization of Marine Renewable Energy Systems
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Control and Optimization of Marine Renewable Energy Systems

A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312). This special issue belongs to the section "Marine Energy".

Deadline for manuscript submissions: 25 August 2026 | Viewed by 1944

Special Issue Editors

Prof. Dr. Guang Li

E-Mail Website
Guest Editor
School of Engineering, University of Manchester, Manchester M13 9PL, UK
Interests: control system design; offshore renewable energies; wave energy converter; floating offshore wind turbine; optimal power management
Dr. Yingbo Huang

E-Mail Website
Guest Editor
Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, China
Interests: integrated modelling; offshore renewable energies; adaptive control; vibration control; parameter estimation; transient performance improvement

Special Issue Information

Dear Colleagues,

Marine renewable energy systems (MRESs) usually exhibit complicated hydrodynamic and aerodynamic properties and have strong design couplings and constraints across different design domains (mechanical, electrical, power electronics, energy storage, etc.). These complexities introduce great challenges for the development of MRESs towards their commercialization. Device design optimization and control system design play a central role in improving the performance of MRESs: increasing energy conversion efficiency, improving resilience, and enhancing safe operations and resilience against harsh and changing sea conditions. Innovations in design optimization and control for MRESs will ultimately contribute to the reduction in the unit cost of electricity generation and increase their competitiveness in the energy market. This Special Issue focuses on the latest developments in control and design techniques for MRESs, including sea wave, tidal, ocean thermal, salinity gradient, etc. Offshore wind and hybrid energy systems can also be included.

Prof. Dr. Guang Li
Dr. Yingbo Huang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Journal of Marine Science and Engineering is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • control system design
  • optimal design
  • wave energy
  • tidal energy
  • offshore wind
  • ocean thermal
  • salinity gradient

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (3 papers)

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Research

21 pages, 1482 KB  
Article
Multi-Degree-of-Freedom Tuned Mass Damper for Vibration Suppression of Floating Offshore Wind Turbine
by Zhendong Yang, Haoran He, Faxiang Zhang and Jing Na
J. Mar. Sci. Eng. 2026, 14(7), 634; https://doi.org/10.3390/jmse14070634 - 30 Mar 2026
Viewed by 387
Abstract
Stable wind resources in far-reaching sea areas are important direction for the development of renewable energy, making floating offshore wind turbine (FOWT) a focus of current research. However, the working environment of FOWT is severe. Under the condition of changeable wind and waves, [...] Read more.
Stable wind resources in far-reaching sea areas are important direction for the development of renewable energy, making floating offshore wind turbine (FOWT) a focus of current research. However, the working environment of FOWT is severe. Under the condition of changeable wind and waves, the floating platform exhibits various motion responses, which may reduce power generation efficiency and even lead to structural damage with unpredictable consequences. In this paper, the National Renewable Energy Laboratory (NREL) 5 MW OC4-DeepCwind semi-submersible wind turbine is considered, and a multi-degree-of-freedom (M-DOF) tuned mass damper (TMD) system is designed to simultaneously suppress its roll and pitch motion responses. A multi-objective optimization problem is formulated to unify the frequency tuning accuracy, damping ratio constraints, and mass ratio limits through penalty functions. Then an improved Particle Swarm Optimization algorithm with time-varying acceleration coefficients (TVAC-PSO) is employed to determine the optimal TMD parameters, which dynamically adjusts exploration and exploitation capabilities to overcome the limitations of standard PSO in handling the strongly coupled parameter space. A high-fidelity aero-hydro-servo-elastic simulation model is established using OpenFAST to verify the vibration suppression performance under various sea state conditions. Simulation results demonstrate that the proposed M-DOF TMD system can effectively reduce the roll and pitch motion responses and significantly suppress the resonant peak energy, substantially improving the dynamic performance of FOWT. Full article
(This article belongs to the Special Issue Control and Optimization of Marine Renewable Energy Systems)
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27 pages, 9500 KB  
Article
Control of Direct-Drive Wave Energy Conversion Considering Displacement Constraints and an Improved Sensorless Strategy
by Lei Huang, Jianan Hou, Haoran Wang and Zihao Mou
J. Mar. Sci. Eng. 2026, 14(6), 552; https://doi.org/10.3390/jmse14060552 - 15 Mar 2026
Viewed by 403
Abstract
An integrated control strategy is proposed for direct-drive wave energy conversion (DDWEC) systems to address displacement safety constraints and improve the robustness of sensorless position estimation. Under strong wave excitation, buoy displacement may exceed its stroke limit due to conventional amplitude control, leading [...] Read more.
An integrated control strategy is proposed for direct-drive wave energy conversion (DDWEC) systems to address displacement safety constraints and improve the robustness of sensorless position estimation. Under strong wave excitation, buoy displacement may exceed its stroke limit due to conventional amplitude control, leading to mechanical risks. To mitigate this, a displacement-constrained damping regulation law is introduced, incorporating a displacement-dependent correction factor that retains optimal damping within a safe region and increases additional damping smoothly as the displacement approaches its limit. For sensorless operation, a dual-time-scale adaptive amplitude modulation strategy is developed, based on high-frequency square-wave voltage injection. By decoupling the fast position-estimation loop from the slow injection-amplitude adjustment, the demodulated high-frequency current remains within an optimal band, ensuring a high signal-to-noise ratio (SNR) under disturbances and parameter variations. Simulation results show that displacement boundary violations are eliminated, with a 25.7% reduction in peak displacement and only a 7.65% reduction in average captured power. The injection amplitude is adaptively regulated to maintain the demodulated current within the measurement band, enhancing position-estimation stability and accuracy. A fail-safe boundary for extreme sea states (Hs ≈ 2.2 m) is also identified, ensuring robust operation under varying conditions. Full article
(This article belongs to the Special Issue Control and Optimization of Marine Renewable Energy Systems)
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18 pages, 4489 KB  
Article
Attitude Control Method and Model Test for the Wave-Absorbing Buoy of the Sharp Eagle Wave Energy Converter Under All-Sea-State Operations
by Kunlin Wang, Peifan Chen, Yin Ye, Wensheng Wang, Yaqun Zhang and Songwei Sheng
J. Mar. Sci. Eng. 2025, 13(11), 2184; https://doi.org/10.3390/jmse13112184 - 18 Nov 2025
Viewed by 631
Abstract
As a critical component of marine renewable energy, wave energy has long remained a focal point in research on development and use. The Sharp Eagle wave energy converter (hereafter, Sharp Eagle WEC) exhibits wave energy capture efficiency-related advantages, which are attributed to the [...] Read more.
As a critical component of marine renewable energy, wave energy has long remained a focal point in research on development and use. The Sharp Eagle wave energy converter (hereafter, Sharp Eagle WEC) exhibits wave energy capture efficiency-related advantages, which are attributed to the unique structural configuration of its Sharp Eagle wave-absorbing buoy (hereafter, buoy). Operational observations reveal that under severe sea conditions, buoy motion amplitude increases significantly. Consequently, the downstream hydraulic and power generation systems experience excessive power loads, and the converter exceeds displacement limits, causing collisions with end-stop structures, which compromises operational safety. Research findings indicate that the attitude of the buoy directly governs its motion characteristics. We proposed a ballast-and-load-based attitude control method for the buoy. This approach provides safe and efficient operation across all sea conditions. Via scaled model tests, converter operational data covering various ballast configurations were compared and analyzed, focusing on the effects of ballast on the capture width ratio (hereafter, CWR) and piston displacement range of energy conversion hydraulic cylinders. Herein, the feasibility of adjusting capture efficiency and motion displacement by controlling the buoy attitude is validated, providing a technical framework for efficient and safe operation of the WEC under all sea conditions. Full article
(This article belongs to the Special Issue Control and Optimization of Marine Renewable Energy Systems)
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