2025/01/09 更新

トリパシ　ラビ　ナス
トリパシ　ラビ　ナス
Tripathi Ravi Nath
Scopus 論文情報  
総論文数: 0  総Citation: 0  h-index: 9

Citation Countは当該年に発表した論文の被引用数

所属
先端研究・社会連携本部 次世代パワーエレクトロニクス研究センター
職名
助教
外部リンク

研究分野

  • ものづくり技術（機械・電気電子・化学工学） / 制御、システム工学

  • ものづくり技術（機械・電気電子・化学工学） / 電力工学

取得学位

  • 九州工業大学  -  博士（工学）   2017年03月

  • デリー工科大学大学  -  修士（工学）   2013年07月

学内職務経歴

  • 2023年04月 - 現在   九州工業大学   先端研究・社会連携本部   次世代パワーエレクトロニクス研究センター     助教

所属学会・委員会

  • 2023年04月 - 現在   米国電気電子学会 (IEEE)   アメリカ合衆国

  • 2014年12月 - 2023年04月   米国電気電子学会   アメリカ合衆国

論文

  • Fractional order pole fixed second order generalized integrator based control for grid connected solar photovoltaic system 査読有り 国際誌

    Badoni M., Singh A., Tripathi R.N., Kumar R., Singh V.K.

    IET Power Electronics   17 ( 16 )   3057 - 3070   2024年12月

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    担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

    In this article, the development of multi-functional grid connected solar photovoltaic (PV) system using improved Fractional order Control theory-based Pole fixed Second Order Generalized Integrator (FO-PFSOGI) is proposed. The fractional order (FO) control technique offers an advantage to adjust the fixed structure of the integer order and provide additional degree of freedom to achieve accurate response during the system operation. The FO-PFSOGI control technique is used to extricate fundamental constituent of the non-sinusoidal load current. The PV system is competent of feeding the local load requisite and may also inject surplus power into the grid. The voltage source converter (VSC) utilized in the grid-connected system can also be operated as power quality compensator, taking care of harmonics, unbalancing and excess reactive power demand of the local load. The feasibility of multifunctional operations of the converter is established in this article, thus achieving maximum utilization of the power electronics used in the system and reducing the overall cost. A performance comparison of the developed control technique is presented with the conventional techniques in terms of harmonic compensation, weight convergence and computational complexity. The implementation of the controller is modest and extracts fundamental quantities without any phase delay under different loading conditions. The developed system is validated using both simulation and experimental study. A scaled down experimental setup of grid-connected PV system is implemented in the laboratory and real time performance of the FO-PFSOGI is demonstrated using variations in system load and PV irradiance.

    DOI： 10.1049/pel2.12823

    Scopus

    その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85209773720&origin=inward

  • A noise resilient multi-step ahead deep learning forecasting technique for solar energy centered generation of green hydrogen 査読有り 国際誌

    Sareen K., Panigrahi B.K., Shikhola T., Sharma R., Tripathi R.N.

    International Journal of Hydrogen Energy   90   666 - 679   2024年11月

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    担当区分：最終著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

    Generation of green hydrogen based on solar energy is significantly dependent upon photovoltaic (PV) panel energy, which is reliant on the stochastic and intermittent global horizontal irradiance (GHI). Further, if inconsistent power output from PV panels due to influence of noise interferes with continuous supply of energy needed for electrolysis process, then reliable generation of green hydrogen may be impacted. Therefore, in this study, preliminary fast fourier transform (FFT) technique for noise removal is utilized and thereafter, singular spectrum analysis (SSA) algorithm is integrated with Gated Recurrent Unit (GRU) in order to enhance the accuracy during forecasting of green hydrogen reliant on GHI at multiple time steps. The suggested methodology is assessed using GHI dataset for Jaipur site (Rajasthan, India) obtained from National Institute of Wind Energy (NIWE) portal. The monthly average prediction for solar energy centered green hydrogen generation by employing the proposed methodology at Jaipur location corresponds between 0.010 kg/m2 (10 × 103 kg/km2) to 0.020 kg/m2 (20 × 103 kg/km2) in diverse circumstances. The suggested forecasting algorithm provides a reliable and precise methodology that will significantly supports low-carbon economy goals.

    DOI： 10.1016/j.ijhydene.2024.09.389

    Scopus

    その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85205934236&origin=inward

  • Imputation based wind speed forecasting technique during abrupt changes in short term scenario 査読有り 国際誌

    Sareen K., Panigrahi B.K., Shikhola T., Tripathi R.N., Rajput A.K.

    IET Renewable Power Generation   18 ( 14 )   2751 - 2772   2024年10月

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    担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

    It is tough and complex to forecast wind speed due to its intermittent and stochastic nature as well as sudden and abrupt variations in the wind speed. Further, it is required to handle the variety of scenarios e.g. cyber-attacks, unexpected power device malfunction, communication/sensor outages etc. that can cause the missing data.This paper proposes and employs a de-noising autoencoder algorithm for wind speed forecasting to ensure the handling of missing data information. At the next step, the data is processed via variational mode decomposition technique to mitigate the noise and improves the model's prediction accuracy. Furthermore, the bi-directional long-short term memory deep learning approach is tied with convolution neural network to increase prediction accuracy and anticipating the sudden/abrupt changes in wind speed accurately. Finally, actual wind speed related data is examined to scrutinize meticulousness of projected forecast methodology particularly during sudden/abrupt changes in the wind speed. The parameter indicators of the wind speed forecasting technique exhibit the capability of improved predictions under the diversified conditions.

    DOI： 10.1049/rpg2.13124

    Scopus

    その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85206947373&origin=inward

  • Unbalanced Half-bridge Split Capacitor Power Decoupling with Multi-Order Frequency Control for 800V On-board Battery Charger 査読有り 国際誌

    3. Tuyen D. Nguyen, Long Nguyen, Dong Tran, Ravi Nath Tripathi, Hai N. Tran

    Transactions on Transportation Electrification ( IEEE )   10 ( 2 )   3218 - 3230   2024年06月

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    記述言語：英語   掲載種別：研究論文（学術雑誌）

    This article proposes a new method for the design and control of a half-bridge split capacitor-based power decoupling (HSC-PD) circuit to eliminate the bulky electrolytic capacitors (E-caps) at dc-link, targeting 800-V on-board battery charger (OBC) applications with higher reliability and power density.

    DOI： 10.1109/TTE.2023.3299988

    DOI： 10.1109/TTE.2023.3299988

    Scopus

    その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85166782732&origin=inward

  • Dead- Time Evaluation With Switching Frequency for GaN-Based Non-Inverting Buck-Boost DC–DC Converter Using FPGA-Based High-Frequency Control 査読有り

    Ravi Nath Tripathi

    IEEE Journal of Emerging and Selected Topics in Power Electronics (JESTPE) ( IEEE )   12 ( 1 )   496 - 504   2024年02月

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    担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

    This article presents the GaN-based non-inverting buck-boost (NIBB) dc–dc converter for high-frequency and high-efficiency operation. The feedback control was designed and implemented using FPGA for the operation of the converter at a switching frequency of 500 and 800 kHz under different operating load conditions.

    DOI： 10.1109/JESTPE.2023.3344458

    Scopus

    その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85181574907&origin=inward

  • Implication of Active Semiconducting Layer Thickness on the Performance of Organic Schottky Diodes 査読有り

    Gaurav K.V., Sharma S., Tripathi R.N., Pandey S.S.

    2024 31st International Workshop on Active-Matrix Flatpanel Displays and Devices, AM-FPD 2024   140 - 143   2024年01月

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    記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

    Metal/semiconductor interface plays a dominant role in controlling the performance of organic electronic devices. The thin films of RR-P3HT with varying thicknesses fabricated by spin-coating were utilized to investigate the optoelectronic characteristics of organic Schottky diodes (OSDs). The OSD was fabricated in the Glass/Au/P3HT/AlOx/Al sandwich device architecture. The increase in thickness ofRR-P3HT led to a decrease in the molecular ordering of the fabricated thin films as confirmed by electronic absorption spectroscopy. At the same time, OSDs fabricated using thin films with varying thicknesses from 50 nm-500 nm led to a decrease in both the ideality factor from 2.6 - 4.3 and rectification ratio from 105 -103, while there was an increase in the breakdown voltage from 25 V -110 V.

    DOI： 10.23919/AM-FPD61635.2024.10615781

    Scopus

    その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85203128582&origin=inward

  • Paralleling of IGBT Power Semiconductor Devices and Reliability Issues", Electronics 査読有り 国際誌

    Ravi Nath Tripathi, Ichiro Omura

    Electronics ( MDPI )   12 ( 18 )   3826 - 3826   2023年08月

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    担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：記事・総説・解説・論説等（学術雑誌）

    This paper discusses and analyzes issues associated with the paralleling of IGBT power devices, which can evoke serious reliability issues. Furthermore, the paper examines the techniques and methodologies that have been proposed to reduce the issue of current unbalancing of parallel-connected power devices.

    DOI： 10.3390/electronics12183826

    DOI： 10.3390/electronics12183826

    Scopus

    CiNii Research

    その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85172873004&origin=inward

  • Unbalanced Half-bridge Split Capacitor Power Decoupling with Multi-Order Frequency Control for 800V On-board Battery Charger", 査読有り

    Tuyen D. Nguyen, Long Nguyen, Dong Tran, Ravi Nath Tripathi, Hai N. Tran

    IEEE Conference proceedings ( IEEE )   1263 - 1267   2023年08月

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    担当区分：責任著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

    South Korea   2023年05月22日  -  2023年05月25日

    A new design and control method proposed for HSC-PD to minimize the capacitance needed for the dc-link of the OBC enables the deployment of Film capacitors (Fcap) only.

    DOI： 10.23919/ICPE2023-ECCEAsia54778.2023.10213494

    DOI： 10.23919/ICPE2023-ECCEAsia54778.2023.10213494

    Scopus

    その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85170650070&origin=inward

  • A Robust Fractional-Order Control Scheme for PV-Penetrated Grid-Connected Microgrid 査読有り 国際誌

    Pachauri N., Thangavel V., Suresh V., Kantipudi M.P., Kotb H., Tripathi R.N., Bajaj M.

    Mathematics   11 ( 6 )   2023年03月

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    担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

    This article presents a new cascaded control strategy to control the power flow in a renewable-energy-based microgrid operating in grid-connected mode. The microgrid model is composed of an AC utility grid interfaced with a multi-functional grid interactive converter (MF-GIC) acting as a grid-forming converter, a photovoltaic (PV) power-generation system acting as grid-feeding distributed generation unit, and various sensitive/non-sensitive customer loads. The proposed control strategy consists of a fractional order PI (FO-PI) controller to smoothly regulate the power flow between the utility grid, distributed generation unit, and the customers. The proposed controller exploits the advantages of FO (Fractional Order) calculus in improving the steady-state and dynamic performance of the renewable-energy-based microgrid under various operating conditions and during system uncertainties. To tune the control parameters of the proposed controller, a recently developed evaporation-rate-based water-cycle algorithm (ERWCA) is utilized. The performance of the proposed control strategy is tested under various operating conditions to show its efficacy over the conventional controller. The result shows that the proposed controller is effective and robust in maintaining all the system parameters within limits under all operating conditions, including system uncertainties.

    DOI： 10.3390/math11061283

    Scopus

    その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85151327668&origin=inward

  • Hybrid GaN-SiC Power Switches for Optimum Switching, Conduction and Free-Wheeling Performance 査読有り

    Bayarkhuu B., Tripathi R.N., Omura I., Castellazzi A.

    Proceedings of the International Symposium on Power Semiconductor Devices and ICs   2022-May   301 - 304   2022年01月

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    記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

    In the wide bandgap (WBG) arena, it is generally considered that GaN and SiC are competitors for the 600 V voltage class. However, in reality, they possess partly highly complementary functional characteristics, which, when duly combined, can yield advanced performance in power conversion applications. Here, the focus is specifically on the development of a hybrid GaN-SiC power switch to demonstrate superiority over either a GaN-only or SiC-only transistor. It is an original undertaking, whose outcomes will be directly applicable to several application domains.

    DOI： 10.1109/ISPSD49238.2022.9813667

    Scopus

    その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85134203065&origin=inward

  • GaN-based High Frequency NIBB dc-dc Converter with Feedback Control Using FPGA 査読有り

    Tripathi R.N., Castellazzi A.

    2022 International Power Electronics Conference, IPEC-Himeji 2022-ECCE Asia   492 - 497   2022年01月

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    担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

    This paper presents a GaN-based high frequency non-inverting buck-boost (NIBB) dc-dc converter with voltage-only feedback control loop. A two-layer PCB is designed to test the high-frequency operation of NIBB converter. Furthermore, feedback control is developed using FPGA for the regulation of output voltage corresponding to change in the load conditions and input voltage variations. The feedback control operation of NIBB tested under different load conditions as well as dead-time to investigate the system performance.

    DOI： 10.23919/IPEC-Himeji2022-ECCE53331.2022.9807114

    Scopus

    その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85134256179&origin=inward

  • Current Balancing of Parallel-Connected SiC devices using Active Gate Control 査読有り

    Tripathi R.N.

    2022 International Conference on Electrical Machines and Systems, ICEMS 2022   2022年01月

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    担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

    The semiconductor devices deal with the limitation of semiconductor area and performance trade-off. The paralleling of power semiconductor devices is required to match the power rating and the improved system performance. Nevertheless, the parallel-connected system is susceptible to current unbalancing due to the non-identical device/system parameters that ultimately concern the system de-rating and reliability issues. This paper presents the current balancing of parallel-connected SiC devices. An active gate control method is used to balance the dynamic as well as static current of the power devices.

    DOI： 10.1109/ICEMS56177.2022.9983228

    Scopus

    その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85146324460&origin=inward

  • Electrothermal Modeling, Simulation, and Electromagnetic Characterization of a 3.3 kV SiC MOSFET Power Module 査読有り

    Scognamillo C., Catalano A.P., Borghese A., Riccio M., D'Alessandro V., Breglio G., Irace A., Tripathi R.N., Castellazzi A., Codecasa L.

    Proceedings of the International Symposium on Power Semiconductor Devices and ICs   2021-May   123 - 126   2021年05月

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    記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

    This paper presents the modeling of the electrothermal and electromagnetic behavior in SiC-based multi-chip power modules. The proposed approach is based on a macromodeling technique and is applied to a realistic case-study. Preliminarily, the assembly under analysis was experimentally characterized to estimate its parasitics due to electromagnetic interactions. Extremely fast and efficient electrothermal simulations were then performed in a SPICE-like environment. Parasitics and nonlinear thermal effects were accounted for in simulations at high switching frequencies. Results demonstrate that such an approach can be successfully adopted in the design flow of power modules in any device technology.

    DOI： 10.23919/ISPSD50666.2021.9452207

    Scopus

    その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85112547498&origin=inward

  • A fully digital feedback control of gate driver for current balancing of parallel connected power devices 査読有り 国際誌

    Tripathi R., Tsukuda M., Omura I.

    Microelectronics Reliability   88-90   505 - 509   2018年09月

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    担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

    Parallel connected power devices such as Insulated Gate Bipolar Transistors (IGBTs) can be used to realize a system with higher current and higher power rating. However, the operation of parallel connected IGBTs is prone to unbalancing due to variation in parameters of the semiconductor devices and asymmetric parallel system. In this paper, feedback control is proposed for peak overshoot minimization as well as current balancing of parallel connected IGBTs. A fully digital feedback control (DFC) is implemented using the universal clock for balanced operation of the two parallel connected IGBTs.

    DOI： 10.1016/j.microrel.2018.06.030

    Scopus

    その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85054829629&origin=inward

  • 2-DOF based novel controller design for DC voltage regulation of LCL interfaced three phase grid connected solar PV system 査読有り 国際誌

    Tripathi R., Hanamoto T.

    2015 IEEE 2nd International Future Energy Electronics Conference, IFEEC 2015   2015年12月

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    担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

    The dedicated PI controller for dc voltage regulation and control has been implemented with control technique for operation of grid-connected PV system. Generally, dedicated PI controller have been used for the dc link voltage control due to ease of implementation. The PI controller is having constraint regarding response time and overshoot with only proportional and one integral gain. The conventional PI controller is having one degree of freedom (DOF). In this paper the 2-DOF PI controller in PI-P configuration is been proposed for the dc link voltage control. It is based upon the concept to increase the DOF in the system. The system with PI-P controller with 2 DOF having two proportional gains and one integral gain. The performance of the PI-P controller is compared with the PI controller while PV system connected to grid (considering grid current response) and under disturbance in reference dc voltage. The system transient during interconnection have been improved and showing better response for dc voltage control.

    DOI： 10.1109/IFEEC.2015.7361626

    Scopus

    その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84962385402&origin=inward

  • High Efficiency Dual-Bridge LLC Resonant Converter with Adaptive Frequency Control for On Board Charger Applications 査読有り

    Tuyen D. Nguyen, Trinh Nguyen, Ravi Nath Tripathi, Long H. B. Nguyen, Minh V. Vo, Hai N. Tran

    IEEE Conference proceedings ( IEEE )   1615 - 1620   2023年08月

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    記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

    This paper proposes an adaptive frequency control strategy for the unidirectional DC/DC converter based on Dual-bridge LLC (DBLLC) resonant converter to eliminate the circulating interval (CI), which causes high conduction loss. The LLC resonant converters are the preferred choice to select of DC/DC converter topology for on-board charger (OBC) due to it provides many advantages such as high efficiency, high power density.

    DOI： 10.23919/ICPE2023-ECCEAsia54778.2023.10213755

    DOI： 10.23919/ICPE2023-ECCEAsia54778.2023.10213755

    Scopus

    その他リンク： https://ieeexplore.ieee.org/document/10213755

▼全件表示

口頭発表・ポスター発表等

講演

  • Keynote

    IEEE-sponsored 2024 International Conference on Advances in Computing, Communication, and Materials (ICACCM)  2024年11月 

    　詳細を見る

    開催期間： 2024年11月22日 - 2024年11月23日   発表言語：英語   講演種別：基調講演  

科研費獲得実績

担当授業科目（学内）

  • 2024年度   計測制御システム演習

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    科目区分：大学院専門科目

    生体親和型制御システムや環境配慮型電子デバイスを構築するのに必要な基礎的な計測技術、制御技術、信号処理技術、デバイス構造解析技術に関して、汎用のハードウェア及びソフトウェアを用いた演習を行う。マイクロコンピュータを用いて、パワーエレクトロニクス回路とのディジタル信号の入出力に関する制御技術を習得する

学会・委員会等活動

  • INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING, COMPUTATION, ELECTRONICS, POWER AND TELECOMMUNICATION   International Advisory committee  

    2024年03月 - 現在

  • Electronics MDPI   Guest Editor  

    2023年03月 - 現在

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    Applications, Control and Design of Power Electronics Converters

    A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Power Electronics".