URASAKI Naomitsu

写真a

Title

Professor

Researcher Number(JSPS Kakenhi)

70305184
2 2
To the head of this page.▲

Current Affiliation Organization 【 display / non-display 】

  • Duty   University of the Ryukyus   Faculty of Engineering   School of Engineering_Electrical and Systems Engineering Program   Professor  

  • Concurrently   University of the Ryukyus   Graduate School of Engineering and Science   Electrical Energy and Systems Control Engineering   Professor  

  • Concurrently   University of the Ryukyus   Graduate School of Engineering and Science   Material,Structural and Energy Engineering   Professor  

To the head of this page.▲

University 【 display / non-display 】

  • 　
    -
    1996.03

    University of the Ryukyus   Faculty of Engineering   Electrical Engineering   Graduated

To the head of this page.▲

Graduate School 【 display / non-display 】

  • 　
    -
    1998.03

    University of the Ryukyus  Graduate School, Division of Engineering  Master's Course  Completed

To the head of this page.▲

Academic degree 【 display / non-display 】

  • University of the Ryukyus -  Doctor of Engineering

To the head of this page.▲

External Career 【 display / non-display 】

  • 1998.04
    -
    2006.03

     

  • 2006.04
    -
    2015.04

     

  • 2015.05
    　
    　

    - , University of the Ryukyus, Faculty of Engineering, Department of Electrical and Electronics Engineering, Electomagnetic Energy Engineering, Professor  

  • 2015.05
    　
    　

     

  • 2015.05
    -
    2017.03

    University of the Ryukyus, Faculty of Engineering, Department of Electrical and Electronics Engineering, Electomagnetic Energy Engineering, Professor  

display all >>

To the head of this page.▲

Research Interests 【 display / non-display 】

  • Electric Machinery

To the head of this page.▲

Research Areas 【 display / non-display 】

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Power engineering

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Power engineering

To the head of this page.▲

Published Papers 【 display / non-display 】

  • Enhancing Electric Vehicle Power Management with Dynamic Power Allocation

    Chintala Gnanasekar Hariharan, Naomitsu Urasaki, Girish Ganesan Ramanathan

    The International Council on Electrical Engineering (ICEE2024)     2024.06 [ Peer Review Accepted ]

    Type of publication: Research paper (international conference proceedings)

  • Fast-MPPT control algorithm capable of escaping Local Maximum Power Points

    KINJO Hideya, URASAKI Naomitsu

    Journal of Japan Solar Energy Society ( Japan Solar Energy Society )  50 ( 3 ) 85 - 92   2024.05 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

    　View Summary

    <p>The power-voltage (PV) characteristic of a photovoltaic (PV) string has multiple local maxima under partial shading conditions (PSCs). Maximum power point tracking (MPPT) control needs both accuracy and fast speed. However, due to the trade-off between accuracy and tracking speed, MPPT methods that complement them are not yet complete. Another issue is the inability to detect changes in the high-voltage side local maxima when operating at the low-voltage side maximum power point. This study proposes an MPPT method based on a system with current sensors in each module. This proposed method can detect individual short-circuit currents and estimate the maximum power point quickly and accurately, furthermore respond to changes in all power points. Through simulations, the MPPT method is compared with the conventional method (scan method) in terms of tracking time and accuracy.</p>

  • A Study of Grid-Connected Residential PV-Battery Systems in Mongolia

    Baigali Erdenebat, Davaanyam Buyankhishig, Sergelen Byambaa, Naomitsu Urasaki

    Energies ( MDPI )  16 ( 10 )   2023.05 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

  • Construction of an improved simulator that can calculate the amount of power generation by a residential photovoltaic power generation system, taking into account the effect of partial shading

    MIYAGI Yuma, URASAKI Naomitsu

    Journal of Japan Solar Energy Society ( Japan Solar Energy Society )  48 ( 6 ) 57 - 63   2022.11 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

    　View Summary

    <p>Generally, when a photovoltaic power generation system is installed in a house, we will investigate how much power generation can be expected. This system is highly dependent on solar radiation intensity, so it is necessary to simulate under the effect of partial shading. In this study, we verified the operation of the output under partial shading conditions and constructed a simulator that reflects the effects of partial shading. In addition, using data from late February to early March, we compared the calculated values in the constructed simulator with the measured values, the error was extremely small and almost exactly calculated. However, there are days when the calculated values without considering partial shading agree with the measured values, and the tendency of this problem to occur will be discussed in the future.</p>

  • BESS based voltage stability improvement enhancing the optimal control of real and reactive power compensation

    Habibullah Feday, Mikaeel Ahmadi, Abdul Basir Faiq, Naomitsu Urasaki, Tomonobu Senjyu

    AIMS Energy ( AIMS Energy )  10 ( 3 ) 535 - 552   2022.06 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

    • Access this article
      DOI

display all >>

To the head of this page.▲

Other Papers 【 display / non-display 】

To the head of this page.▲

Presentations 【 display / non-display 】

  • Technical and economic impacts of smart grids and microgrids on rural areas with a case study in Southern Senegal

    SALL Makhtar, Ahmadi Mikaeel, Naomitsu Urasaki, and Tomonobu Senjyu

    令和元年度電気学会九州支部沖縄支所講演会  2019.12  -  2019.12 

  • Optimal voltage improvement of distribution /sub transmission network in southern Senegal

    SALL Makhtar, Ahmadi Mikaeel, Viegas Sergio Bernardo, Naomitsu Urasaki, and Tomonobu Senjyu

    電気学会電力技術・電力系統技術合同研究会  2019.09  -  2019.09 

  • EV用ハイブリッド電源の逐次更新型区間平均に基づく負荷配分法

    杉浦　成，浦崎直光

    電気学会モータドライブ・回転機・自動車合同研究会  2019.07  -  2019.07 

  • Solar Powered Automatic Irrigation System Using Raspberry pi and Wireless Technology Applied to Senegal

    Amady Cisse, Naomitsu Urasaki, and Tomonobu Senjyu

    平成30年度電気学会九州支部沖縄支所講演会  2018.12  -  2018.12 

  • Reliability Investigations Under the Fault Operation for Distributed Wind Farms and Smart Houses Based Smart Grid System

    Abdul Motin Howlader, Hiroki Ikema, Naomitsu Urasaki, and Tomonobu Senjyu

    平成26年度電気学会九州支部沖縄支所講演会  2014.11  -  2014.11 

display all >>

To the head of this page.▲

SDGs 【 display / non-display 】

  • 再生可能エネルギーを活用した電気自動車の充電ステーション

To the head of this page.▲

Social Activity 【 display / non-display 】

  • 2024.01
    -
    2024.03

  • 2023.11
    　
    　

  • 2023.09
    -
    2024.02

  • 2022.05
    -
    2024.05

To the head of this page.▲

Academic Activities 【 display / non-display 】

  • [International contribution]

    一般社団法人電気学会 

    2024.9
    　
    　

    種別： Academic society, research group, etc. 

    　View Summary

    部門英文論文誌の論文査読において査読期間短縮のため献身的な活動をした。

To the head of this page.▲