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Research on practical choice of control forces' parameter for drawing out the power potential of WEC array in irregular waves

Research Project

Project/Area Number 18K04581
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 24020:Marine engineering-related
Research InstitutionYokohama National University

Principal Investigator

Murai Motohiko  横浜国立大学, 大学院環境情報研究院, 准教授 (60292893)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords波浪発電 / 浮体式 / 波エネルギー / 波浪発電ファーム / 波の干渉 / 浮体式波浪発電 / PA-WEC / 制御力 / 波浪発電最大化 / 不規則波 / 波力発電 / 発電量最大化 / 列配置 / 波の予測 / 複数浮体 / 干渉影響 / リニア式波力発電システム / 波浪発電の制御力 / 海洋再生可能エネルギー / 浮体 / アレイ / 制御
Outline of Final Research Achievements

The Linear type PA-WEC is one of the system of a floating Wave Energy Converter. In this system, a given driving force decides both of the motion of PA-WEC and generated energy. It needs the optimal driving control force for maximizing the generated electric power.
In this research, we proposed the analytical/numerical methods of deciding the optimal control force and the arrangement of multi-PA-WEC in regular waves. Furthermore, we show the time domain analytical solution of maximizing the power generation in irregular waves defined with wave spectrum. These were confirmed and validated via a lot of numerical simulations. And as an additional proposal, we carried out the method of deciding the optimal control force in irregular waves by using AI model.

Academic Significance and Societal Importance of the Research Achievements

波力発電システムは、波のエネルギーから電力を産むシステムである。波エネルギーは波高の2乗に比例し、日本近海でも大きなポテンシャルがある。一方で、波エネルギーを取り出すには、その波によって物体を動かし、その動いた物体の運動エネルギーからエネルギーを取り出す必要がある。本研究では浮体での波力発電システムを想定し、規則的な波の場合における最適なエネルギーを取り出す制御係数の決め方、複数の波力発電システムを想定したときの波の干渉を効果的に利用できる配置やその時の制御係数の決定法とその効果、実際に想定される不規則波の中での最適な制御係数の決定方法などについて、数値解析を通して明らかにした。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (20 results)

All 2021 2020 2019 2018

All Journal Article (12 results) (of which Peer Reviewed: 12 results,  Open Access: 2 results) Presentation (8 results) (of which Int'l Joint Research: 8 results)

  • [Journal Article] Study on power generation of single Point Absorber Wave Energy Converters (PA-WECs) and arrays of PA-WECs2021

    • Author(s)
      Murai Motohiko、Li Qiao、Funada Junki
    • Journal Title

      Renewable Energy

      Volume: 164 Pages: 1121-1132

    • DOI

      10.1016/j.renene.2020.08.124

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Research on how the arrangement of arrayed PA-WECs influences to their electric power generation2020

    • Author(s)
      Funada Junki、Murai Motohiko、Li Qiao
    • Journal Title

      Journal of the Japan Society of Naval Architects and Ocean Engineers

      Volume: 31 Issue: 0 Pages: 59-71

    • DOI

      10.2534/jjasnaoe.31.59

    • NAID

      130007905617

    • ISSN
      1880-3717, 1881-1760
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Consideration on how to decide the optimal control force of a PA-WEC for maximizing its electric power generation in irregular waves2020

    • Author(s)
      Murai Motohiko、Iikura Hibiki
    • Journal Title

      Journal of the Japan Society of Naval Architects and Ocean Engineers

      Volume: 31 Issue: 0 Pages: 73-81

    • DOI

      10.2534/jjasnaoe.31.73

    • NAID

      130007905611

    • ISSN
      1880-3717, 1881-1760
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] How the Hydrodynamic Response of PA-WECs’ Array Under Maximizing the Power Generation by its Arrangement and Control Force Change?2020

    • Author(s)
      Murai Motohiko、Funada Junki、Li Qiao
    • Journal Title

      Proc. OMAE2020

      Volume: Vol.5 Pages: 1-8

    • DOI

      10.1115/omae2020-18189

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Short-time wave force prediction and control strategy for a point-absorber WEC2020

    • Author(s)
      Li Qiao、Murai Motohiko、Kitazawa Daisuke
    • Journal Title

      Ocean Engineering

      Volume: 218 Pages: 108000-108000

    • DOI

      10.1016/j.oceaneng.2020.108000

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] ポイントアブソーバー型浮体式波力発電システムの列配置が 発電量に与える影響に関する研究2020

    • Author(s)
      舩田純希, 村井基彦, 李僑
    • Journal Title

      日本船舶海洋工学会論文集

      Volume: -

    • NAID

      130007905617

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] STUDY ON THE GENERATED POWER CHANGES BY THE RELATION BETWEEN AN ARRANGEMENT OF AN ARRAY OF POINT ABSORBER TYPE WECS AND AN INCIDENT WAVE ANGLE2019

    • Author(s)
      Motohiko Murai, Li. Qiao, Junki Funad
    • Journal Title

      Proc of the ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering OMAE2019

      Volume: -

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] CONTROL STRATEGY FOR A POINT-ABSORBER WAVE ENERGY CONVERTER2019

    • Author(s)
      Li. Qiao, M.Murai
    • Journal Title

      Proc of the ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering OMAE2019

      Volume: -

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] A Study on Electrical Power for Multiple Linear Wave Energy Converter Considering the Interaction Effect2018

    • Author(s)
      Li Qiao、Murai Motohiko、Kuwada Syu
    • Journal Title

      Energies

      Volume: 11 Issue: 11 Pages: 2964-2964

    • DOI

      10.3390/en11112964

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Development of a Practical Prediction Method of Wave Force for a Wave Energy Converter2018

    • Author(s)
      Li Qiao、Murai Motohiko
    • Journal Title

      Journal of the Japan Society of Naval Architects and Ocean Engineers

      Volume: 27 Issue: 0 Pages: 125-132

    • DOI

      10.2534/jjasnaoe.27.125

    • NAID

      130007439666

    • ISSN
      1880-3717, 1881-1760
    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Study on a Time Domain Prediction Method for Wave Force: Application for a Point-Absorber WEC2018

    • Author(s)
      Li Qiao、Murai Motohiko
    • Journal Title

      Proc. of ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering

      Volume: -

    • DOI

      10.1115/omae2018-77720

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] On Prediction Method of Optimized Control Parameters for an Array of Point Absorber Type Wave Energy Converters in Waves2018

    • Author(s)
      Murai Motohiko、Li Qiao、Funada Junki、Shigetome Hasuki
    • Journal Title

      Proc. of 2018 OCEANS - MTS/IEEE Kobe Techno-Ocean (OTO)

      Volume: - Pages: 1-8

    • DOI

      10.1109/oceanskobe.2018.8558847

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] The Fundamental Research on AI Prediction and Determination of Control Force for Maximizing the Power Generation of PA-WEC in Irregular Waves2021

    • Author(s)
      Motohiko MURAI
    • Organizer
      OMAE2021
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] HOW THE HYDRODYNAMIC RESPONSE OF PA-WECS’ ARRAY UNDER MAXIMIZING THE POWER GENERATION BY ITS ARRANGEMENT AND CONTROL FORCE CHANGE?2020

    • Author(s)
      Motohiko MURAI
    • Organizer
      OMAE2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The study on a trend of the appropriate control forces for maximizing the power generation on lined up multi PA-WECs2019

    • Author(s)
      舩田純希
    • Organizer
      EAWOMEN2 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] STUDY ON THE GENERATED POWER CHANGES BY THE RELATION BETWEEN AN ARRANGEMENT OF AN ARRAY OF POINT ABSORBER TYPE WECS AND AN INCIDENT WAVE ANGLE2019

    • Author(s)
      村井基彦
    • Organizer
      OMAE2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] CONTROL STRATEGY FOR A POINT-ABSORBER WAVE ENERGY CONVERTER2019

    • Author(s)
      李僑
    • Organizer
      OMAE2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] A SIMPLE PREDICTION METHOD OF IRREGULAR WAVES FOR CHOOSING A CONTROL PARAMETER OF A WAVE ENERGY CONVERTER SYSTEM2019

    • Author(s)
      村井基彦
    • Organizer
      SNAK 2019 Annual Autumn Meeting
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] STUDY ON A TIME DOMAIN PREDICTION METHOD FOR WAVE FORCE2018

    • Author(s)
      Motohiko MURAI
    • Organizer
      the ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering OMAE2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] On prediction method of optimized control parameters for an array of point absorber type Wave Energy Converters in waves2018

    • Author(s)
      Junki FUNADA
    • Organizer
      2018 OCEANS - MTS/IEEE Kobe Techno-Ocean (OTO)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2022-01-27  

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