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• Load frequency control enhancement of islanded micro-grid considering high wind power penetration using superconducting magnetic energy storage and optimal controller

  Mohamed E., Mitani Y.

  Wind Engineering    43 ( 6 ) 609 - 624   2019年12月  [査読有り]

   概要を見る

  © The Author(s) 2019. This article proposes a robust load frequency control using a new optimal proportional–integral–derivative controller–based genetic moth swarm algorithm for islanded microgrids considering high wind power penetration. In such microgrids, the replacement of conventional generator units with a large number of renewable energy sources reduces the system inertia, which in turn causes undesirable influence on microgrid frequency stability, leading to weakening of the microgrid. Furthermore, sudden load shedding, load restoring, and short circuits caused large frequency fluctuations which threaten the system security and could lead to complete blackouts as well as damages to the system equipment. In order to solve this challenge, this study proposes a new coordinated optimal load frequency control plus modified control signal to superconducting magnetic energy storage for compensating the microgrid frequency deviation (∆f). To prove the effectiveness of the proposed coordinated control strategy, an islanded microgrid was tested for the MATLAB/Simulink simulation. The physical constraints of the turbines such as generation rate constraints and speed governor dead band are considered in this study. The results confirmed the effectiveness and robustness of the proposed coordination performance against all scenarios of different load profiles, wind power fluctuation, and system uncertainties in microgrid integrated with high penetration of wind farms. Moreover, the results have been compared with both: the optimal load frequency control with/without the effect of conventional superconducting magnetic energy storage.

  DOI Scopus

• Supplementary frequency control in a high-penetration real power system by renewables using SMES application

  Magdy G., Nour M., Shabib G., Elbaset A.A., Mitani Y.

  Journal of Electrical Systems    15 ( 4 ) 526 - 538   2019年12月  [査読有り]

   概要を見る

  © JES 2019. In modern power systems, the penetration level of Renewable Energy Sources (RESs) is strikingly increasing. Where, many synchronous generators are being replaced by the RESs-based the power electronic devices, this will reduce the overall system inertia. Moreover, the intermittent nature of the RESs causes several control problems such as frequency/voltage instability problem. Hence, these disturbances threaten preservation the power system stability and can lead to system collapse. In addition, the secondary frequency control action (i.e., Load Frequency Control (LFC) will not be sufficient to maintain the system frequency close to its scheduled value. Therefore, this paper proposes an application of Superconducting Magnetic Energy Storage (SMES) system based on an optimal PID controller, which is optimally designed by the Particle Swarm Optimization (PSO) to enhance the frequency stability of modern power systems due to high RESs penetration. From the perspective of the LFC, the proposed controlled SMES can be used as a feedback controller with the aim of supporting the frequency control loops for frequency stability enhancement of the power systems. Moreover, the effectiveness of the proposed control strategy is tested and verified through a real hybrid power system in Egypt (i.e., Egyptian Power System (EPS) that includes thermal, gas, hydraulic power plants, wind, and solar energy. The obtained simulation results by Matlab/Simulink software reveal that the proposed control strategy achieved superior dynamic responses satisfying the LFC requirements in all test scenarios. Consequently, the frequency stability is improved regarding peak undershoot, peak overshoot, and settling time.

  Scopus

• Applying virtual inertia control topology to SMES system for frequency stability improvement of low-inertia microgrids driven by high renewables

  Kerdphol T., Watanabe M., Mitani Y., Phunpeng V.

  Energies    12 ( 20 )   2019年10月  [査読有り]

   概要を見る

  © 2019 by the authors. To integrate renewable energy into microgrids with a favorable inertia property, a virtual inertia control application is needed. Considering the inertia emulation capabilities, insufficient emulation of inertia power due to the lower and short-term power of storage systems could significantly cause system instability and failure. To enhance such capability, this paper applies a virtual inertia control topology to the superconducting magnetic energy storage (SMES) technology. The SMES-based virtual inertia control system is implemented in a microgrid with renewables to emulate sufficient inertia power and maintain good system frequency stability. The efficacy and control performance of the proposed control method are compared with those of the traditional virtual inertia control system. Simulation results show that the shortage of system inertia due to renewable penetration is properly compensated by the proposed control method, improving system frequency stability and maintaining the robustness of system operations.

  DOI Scopus

• Construction of Standardization Method of Estimated Power Consumption System by Driving of EV using Geographic Information System and User's Driving Data

  Shiota A., Nakayama S., Iwai H., Tsuruhara K., Kerdphol T., Mitani Y.

  ACM International Conference Proceeding Series      62 - 67   2019年09月  [査読有り]

   概要を見る

  © 2019 Association for Computing Machinery. In recent years, global warming is increasing due to the influence of greenhouse gas such as carbon dioxide. Therefore, in the automotive field, emission control has been conducted. Then, automakers are focusing on the EV development. This development still has some concern problems such as a short-distance driving range, long-period charging time, and small amount of charging infrastructure compared with the internal combustion engine vehicle. In addition, EV offers a special feature such as regenerative braking systems. Accordingly, our research team has used the Geographic Information System, road networks, elevation models, and EV driving data to derive the equations of estimated power consumption for each vehicle type individually. The driving support system that manages electric power of EV using this formula is constructed. This research standardized the derivation method of estimated power consumption formula based on previous research achievement. Furthermore, this research constructed a mechanism to collect driving data of the user, reviewing the estimated power consumption formula after the EV was sold. In the accuracy verification of the estimated power consumption, the estimated value calculated by the system was compared with the measured value and the WLTC value. As a result, it was confirmed that to reduce the error.

  DOI Scopus

• Renewable power systems dynamic security using a new coordination of frequency control strategy based on virtual synchronous generator and digital frequency protection

  Magdy G., Shabib G., Elbaset A., Mitani Y.

  International Journal of Electrical Power and Energy Systems    109   351 - 368   2019年07月  [査読有り]

   概要を見る

  © 2019 Elsevier Ltd The renewable power systems have become more susceptible to the system insecure than traditional power systems due to reducing of the total inertia and damping properties that result from replacing the conventional generators with Renewable Energy Sources (RESs) as well as decoupling of the RESs from the AC grid using power converters. Therefore, maintaining the dynamic security of renewable power systems is the key challenge for integrating more RESs. This paper addresses a new strategy of frequency control including virtual inertia control based on Virtual Synchronous Generator (VSG), which emulates the behavior of conventional synchronous generators in large power systems, thus adding some inertia to the system control loop virtually and accordingly stabilizing the system frequency during high penetration of RESs. Moreover, the proposed virtual inertia control system-based VSG is coordinated with digital frequency protection for improvement the frequency stability and preservation the power system dynamic security because of the high integration level of the RESs. The effectiveness of the proposed coordination scheme is tested and verified through small and large scales of power systems, Microgrid (µG) and real hybrid power system in Egypt, respectively. System modelling and simulation results are carried out using Matlab/Simulink® software. The simulation results validated that the proposed coordination scheme can effectively regulate the system frequency and ensure robust performance to maintain the dynamic system security with high share of RESs for different contingencies.

  DOI Scopus

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• Power System Monitoring and Control

  Bevrani H., Bevrani H., Watanabe M., Mitani Y. ( 単著 )

  Power System Monitoring and Control  2014年06月 ISBN: 9781118852422

   概要を見る

  © 2014 by John Wiley & Sons, Inc. All rights reserved.Power System Monitoring and Control (PSMC) is becoming increasingly significant in the design, planning, and operation of modern electric power systems. In response to the existing challenge of integrating advanced metering, computation, communication, and control into appropriate levels of PSMC, Power System Monitoring and Control presents a comprehensive overview of the basic principles and key technologies for the monitoring, protection, and control of contemporary wide-area power systems. A variety of topical issues are addressed, including renewable energy sources, smart grids, wide-area stabilizing, coordinated voltage regulation, and angle oscillation damping-as well as the advantages of phasor measurement units (PMUs) and global positioning systems (GPS) time signal. End-of-chapter problems and solutions, along with case studies, add depth and clarity to all topics. Timely and important, Power System Monitoring and Control is an invaluable resource for addressing the myriad of critical technical engineering considerations in modern electric power system design and operation. Provides an updated and comprehensive reference for researcher and engineers working on wide-area power system monitoring and control (PSMC). Links fundamental concepts of PSMC, advanced metering and control theory/techniques, and practical engineering considerations. Covers PSMC problem understanding, design, practical aspects, and timely topics such as smart/microgrid control and coordinated voltage regulation and angle oscillation damping. Incorporates authors' experiences teaching and researching in various international locales including Japan, Thailand, Singapore, Malaysia, Iran, and Australia.

  Scopus

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• 産業用電力系統における誘導電動機の順次再閉路時間決定法

  金子悠一

  平成29年度（第70回）電気・情報関係学会九州支部連合大会  (平成29年度（第70回）電気・情報関係学会九州支部連合大会)  2017年09月  -  2017年09月   

• EV電費情報を付加した地理情報システム(GIS)利用による走行支援システム

  中山俊太朗

  平成29年度（第70回）電気・情報関係学会九州支部連合大会  (琉球大学　千原キャンパス)  2017年09月  -  2017年09月   

• Modeshapeおよび感度評価による電力系統動揺解析

  高橋響生

  平成29年度（第70回）電気・情報関係学会九州支部連合大会  (琉球大学　千原キャンパス)  2017年09月  -  2017年09月   

• 多地点同期位相計測による 系統間動揺周波数計測に基づく 太陽光発電大量導入の影響評価

  綱分智則

  平成29年度（第70回）電気・情報関係学会九州支部連合大会  (琉球大学　千原キャンパス)  2017年09月  -  2017年09月   

• 配電系統における分散設置効果を考慮したPV出力変動のコージェネレーションを用いた抑制制御効果の評価

  小井手孝徳

  平成29年度（第70回）電気・情報関係学会九州支部連合大会  (琉球大学　千原キャンパス)  2017年09月  -  2017年09月   

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• Phasor Measurement Unit (PMU) as a Powerful Tool to Support Smart Power Delivery （Phasor Measurement Unit (PMU) as a Powerful Tool to Support Smart Power Delivery）

  The International Conference on Electrical Engineering （The International Conference on Electrical Engineering） ( Ｗeihai, China )  2017年07月05日 

• Application of Phasor Measurements to Monitor the Power System Dynamics Associated with Large Amount of PV Installations

  IEEJ P&ES - IEEE Thailand Joint Symposium （IEEJ P&ES - IEEE Thailand Joint Symposium） ( Bangkok, Thailand )  2017年03月07日 

• Applications of Phasor Measurement Unit (PMU) and Geographic Information System (GIS) in Power System Analysis

  Annual Conference of Korea Institute of Electrical Engineering ( Gwanju, Korea )  2016年11月03日  大韓電気学会

• スマート社会を支える電気エネルギー利用技術

  電気材料懇談会   2015年01月15日 

• Phasor and Node Voltage Measurements for Smart Monitoring of Power System Dynamics and Power Flows

  35th Electrical Engineering Conference (EECON-35) in Thailand ( Thailand )  2012年12月14日  35th Electrical Engineering Conference

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• エコ大学　九工大が全国9位

  読売新聞  2013年01月08日

  三谷康範

• 震災後を考える　電力問題

  読売新聞  2011年06月11日

  三谷康範

• 研究室を歩く　環境にやさしい住まいに

  読売新聞  2009年07月30日

  三谷康範,伊東啓太郎

• 小屋でエコ競演　専攻の垣根越えて研究

  西日本新聞  2009年05月23日

  三谷康範

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• 自律分散型電気エネルギー流通監視システム

  基盤研究(A)

  研究期間:  2006年06月  -  2010年03月

  研究課題番号:  18206028

• GPS時刻同期位相計測装置による電力系統動特性監視システムの研究

  特別研究員奨励費

  研究期間:  2004年04月  -  2005年11月

  研究課題番号:  03F03227

• GPS時刻同期位相計測装置による電力系統動特性監視システムの研究

  特別研究員奨励費

  研究期間:  2003年11月  -  2004年03月

  研究課題番号:  03F00227

• 多地点同期フェーザ量計測に基づく広域連系電力系統動特性オンライン評定システム

  基盤研究(B)

  研究期間:  2002年06月  -  2005年03月

  研究課題番号:  14350145

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• 災害時の「電力確保」まで想定した世界最先端のＧ空間防災モデルの構築

  受託研究

  研究期間:  2014年09月  -  2015年03月

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• 電池の適正充放電管理に基づく自然エネルギー発電共生型電気自動車エネルギーマネジメント・制御システム

  提供機関:  電気事業連合会 

  研究期間:  2010年11月  -  2012年10月

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• 北九州市民カレッジ「未来を切り開く電気電子工学」

  2014年12月

  　

  　

• 電気エネルギーが創る未来型エネルギー社会

  2014年10月

  　

  　

   概要を見る

  夢ナビライブ

• 自然エネルギー発電の大量導入をサポートする スマートな電力システムの構築

  2014年09月

  　

  　

   概要を見る

  北九州工業高等専門学校　1年から5年生対象

• 北九州活性化協議会社会人育成プログラム　プロジェクトリーダー

  2014年04月

  -

  継続中

• JICA 太陽光エネルギー発電技術コース

  2012年04月

  -

  継続中

   概要を見る

  「太陽電池大量導入時の電気自動車利用」の講義
  

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• 1st International Symposium on Nature Grid in Green Campus and City

  2012年09月30日  -  2012年09月30日  九州工業大学, 財団法人西日本産業貿易コンベンション協会

• International Seminar of Doctoral Students on Clean Energy Systems 2009

  2009年07月27日  -  2009年07月28日  JENESYS PROGRAM