Papers - MITANI Yasunori

Small-signal analysis of multiple virtual synchronous machines to enhance frequency stability of grid-connected high renewables Reviewed

Kerdphol T., Rahman F.S., Watanabe M., Mitani Y., Hongesombut K., Phunpeng V., Ngamroo I., Turschner D.

IET Generation, Transmission and Distribution   15 ( 8 )   1273 - 1289   2021.04

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Language：English   Publishing type：Research paper (scientific journal)

DOI： 10.1049/gtd2.12101

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Determining Inertia of 60 Hz Japan Power System using PMUs from Power Loss Event Reviewed

Kerdphol T., Watanabe M., Nishikawa R., Tamaki T., Mitani Y.

2021 IEEE Texas Power and Energy Conference, TPEC 2021   2021.02

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Language：English   Publishing type：Research paper (international conference proceedings)

DOI： 10.1109/TPEC51183.2021.9384932

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Consideration of peak cut method by air conditioning equipment corresponding to demand for contract power reduction—Application of thermal radiative cooling/heating system Reviewed

Satake A., Jike J., Mitani Y.

Energy Reports   6   768 - 774   2020.12

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Language：English   Publishing type：Research paper (scientific journal)

DOI： 10.1016/j.egyr.2020.11.132

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Consideration of reducing purchased power using photovoltaic excess power by thermal radiative cooling/heating system Reviewed

Miyawaki R., Satake A., Mitani Y., Ushifusa Y.

Energy Reports   6   814 - 821   2020.12

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Language：English   Publishing type：Research paper (scientific journal)

DOI： 10.1016/j.egyr.2020.11.127

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Monitoring Large-Scale PV Generation Infeed on Grid Frequency using Synchrophasor Measurement: Recent Perspective from Kyushu Island Reviewed

Kerdphol T., Matsukawa Y., Watanabe M., Mitani Y.

Proceedings of the IEEE Power Engineering Society Transmission and Distribution Conference   2020-October   2020.10

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© 2020 IEEE. The growing power in-feed of renewable/non-synchronous energy (e.g., solar/wind energy) in Japan power grid has raised serious concerns about frequency stability and control. The intermittent power output and lack of inertia property from large-scale solar/photovoltaic (PV) farms critically affect the balance between power generation and demand. Subsequently, the dynamic of grid frequency is severely deteriorated, resulting in rapid grid frequency deviations, and in the worst-case, power blackout. This paper proposes an advanced application of synchrophasor measurements for monitoring the dynamics and stability of Kyushu Island power system in the presence of large-scale solar penetration. In such a system, the dynamic analysis of the rate of change of frequency (RoCoF) is of great importance, reflecting the stability aspect of the system. Thus, contrastive scenarios of high-resolution synchrophasor measurements recorded in Kyushu region are analyzed against different levels of solar penetration. The results reveal that monitoring ROCOF and grid frequency variations in each scenario not only indicate the oscillatory behavior of the Kyushu power grid, but also provide useful information of the wide-area dynamic stability.

DOI： 10.1109/TD39804.2020.9299980

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Stability assessment of multiple virtual synchronous machines for microgrid frequency stabilization Reviewed

Kerdphol T., Watanabe M., Mitani Y., Turschner D., Beck H.P.

IEEE Power and Energy Society General Meeting   2020-August   2020.08

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Language：English   Publishing type：Research paper (international conference proceedings)

DOI： 10.1109/PESGM41954.2020.9281491

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Application of PMUs to monitor large-scale PV penetration infeed on frequency of 60 Hz Japan power system: A case study from Kyushu Island Reviewed

Kerdphol T., Matsukawa Y., Watanabe M., Mitani Y.

Electric Power Systems Research   185   2020.08

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Language：English   Publishing type：Research paper (scientific journal)

DOI： 10.1016/j.epsr.2020.106393

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Frequency Stability Assessment on Virtual Inertia Control Strategy in Connected and Islanded Multi-Area Power Systems Reviewed

Lerch K.S., Kerdphol T., Mitani Y., Turschner D.

Proceedings - 2020 IEEE International Conference on Environment and Electrical Engineering and 2020 IEEE Industrial and Commercial Power Systems Europe, EEEIC / I and CPS Europe 2020   2020.06

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Language：English   Publishing type：Research paper (international conference proceedings)

DOI： 10.1109/EEEIC/ICPSEurope49358.2020.9160690

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Solar Power Estimation Using GIS Considering Shadow Effects for Distribution System Planning Reviewed

Bunme P., Shiota A., Mitani Y.

Proceedings - 2020 IEEE International Conference on Environment and Electrical Engineering and 2020 IEEE Industrial and Commercial Power Systems Europe, EEEIC / I and CPS Europe 2020   2020.06

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Language：English   Publishing type：Research paper (international conference proceedings)

DOI： 10.1109/EEEIC/ICPSEurope49358.2020.9160547

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Renewable Power Systems Dynamic Security Reviewed

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

Power Systems   1 - 13   2020.01

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Language：English   Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)

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Introduction and Literature Review Reviewed

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

Power Systems   1 - 13   2020.01

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Language：English   Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)

DOI： 10.1007/978-3-030-33455-0_1

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Dynamic Security Assessment of Low-inertia Microgrids Based on the Concept of Virtual Inertia Control Reviewed

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

Power Systems   59 - 87   2020.01

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Language：English   Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)

DOI： 10.1007/978-3-030-33455-0_4

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Digital Decentralized Control Scheme in Multi-source Power Systems Based on Mapping Technique Reviewed

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

Power Systems   119 - 143   2020.01

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Language：English   Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)

DOI： 10.1007/978-3-030-33455-0_6

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Conclusions and Future Work Reviewed

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

Power Systems   145 - 146   2020.01

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Language：English   Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)

DOI： 10.1007/978-3-030-33455-0_7

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A New Trend in Control of Renewable Power Systems Based on Virtual Synchronous Generator Reviewed

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

Power Systems   89 - 118   2020.01

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Language：English   Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)

DOI： 10.1007/978-3-030-33455-0_5

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A New Frequency Control Strategy in Real Power Systems Considering Wind Energy Reviewed

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

Power Systems   15 - 38   2020.01

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Language：English   Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)

DOI： 10.1007/978-3-030-33455-0_2

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A Comprehensive Digital Protection Scheme for Low-inertia Microgrids Considering High Penetration of Renewables Reviewed

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

Power Systems   39 - 57   2020.01

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Language：English   Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)

DOI： 10.1007/978-3-030-33455-0_3

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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 Reviewed

Mohamed E., Mitani Y.

Wind Engineering   43 ( 6 )   609 - 624   2019.12

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© 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： 10.1177/0309524X18824533

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

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

Journal of Electrical Systems   15 ( 4 )   526 - 538   2019.12

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Language：English   Publishing type：Research paper (scientific journal)

© 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.

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

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

Energies   12 ( 20 )   2019.10

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Language：English   Publishing type：Research paper (scientific journal)

DOI： 10.3390/en12203902

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