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先端電気システム論セミナー

2024年7月27日 (1/2)太田豊 博士 (eVooster CO. Ltd., CEO)
Titleエネルギー×モビリティが創造するスマートな社会システム
Abstractエネルギー分野での分散型再生可能エネルギーの台頭と、モビリティ分野での分散型蓄電池搭載電気自動車の台頭の、シナジーやシンセシスについてその可能性を早くから見出し、学術研究、産学連携、社会実装の種まきなど数々進めてきました。そのまとめおよび日本の社会情勢や制度制約などから来るもどかしさなど率直にお話しします。諸外国がオーバーテークしてきている動向も見えますので、それらの最新動向も交えて研究の意義をお伝えできればと思います。
2024年7月27日 (2/2)萬成遥子 博士 (電力中央研究所 主任研究員)
Title配電系統の運用上のEVへの懸念と期待
Abstract自動車の電動化が進み, 充電のための電力需要の増加が懸念されている一方で, 分散型エネルギーリソース(DER)としてのEVの活用に期待が寄せられています. とりわけ昨今の配電系統においては, 太陽光パネルの連系量増大に伴い電圧管理面で問題が発生しており, その問題解決への貢献が期待されています. 過去の検討をもとに, EVをDERとして活用する上で考慮しなければならない制約と, 配電系統の電圧管理への影響評価について紹介させていただきます.
2024年7月18日Professor Alexandre Mauroy (University of Namur)
TitleA dual Koopman operator formulation in reproducing kernel Hilbert spaces for stability analysis and state estimation
AbstractThe Koopman operator acts on observable functions defined over the state space of a dynamical system, thereby providing a linear global description of the system dynamics. A pointwise description of the system is recovered through a weak formulation, i.e. via the pointwise evaluation of observables at specific states. In this context, the use of reproducing kernel Hilbert spaces (RKHS) is of interest since the above evaluation can be represented as the duality pairing between the observables and bounded evaluation functionals. This representation emphasizes the relevance of a dual formulation for the Koopman operator, where a dual Koopman system governs the evolution of linear evaluation functionals. In this talk, we will report on two distinct works based on this dual formulation: global stability analysis and state estimation. First, we will present a systematic construction of Lyapunov functions based on the pointwise evaluation of Lyapunov functionals obtained for the dual Koopman system. For specific RKHS of analytic functions, this approach yields sufficient stability criteria that are directly expressed in terms of the Taylor expansion coefficients of the vector field. We will also show how stability results can be obtained from data by leveraging our new analytic extended dynamic mode decomposition (analytic EDMD) method. Second, we will build a Luenberger observer that estimates the (infinite-dimensional) state of the Koopman dual system, and equivalently the (finite-dimensional) state of the nonlinear dynamics. This theoretical result supports numerical Koopman operator-based estimation techniques known from the literature.
2024年4月2日 (1/2)Professor Hsiao-Dong Chiang (Cornel University)
TitleOptimal Power Flow Technology for Power Systems: Theory, Computation, and Practical Applications
AbstractThe goal of an optimal power flow (OPF) is to determine the "best" way to operate a power system. Usually “best” = minimizing operating cost or system power loss, while operational and engineering constraints are satisfied. According to a FERC of USA study, a good AC OPF solution engine can save tens of billions of dollars in the US alone every year. SuperOPF is a practical and powerful AC OPF solver, developed by Bigwood Systems Inc. under the sponsorship of Department of Energy, USA and several utility companies in the last 15 years. SuperOPF has been extensively evaluated on practical OPF models ranging from 15,000-bus models to Co-optimization problems with 250,000 control variables. Even though the theoretical foundation of SuperOPF is solid, it may occasionally fail to compute a AC OPF solution due to issues such as the non-existence of an OPF solution and bad initial starting points. To deal with these issues, we have developed theoretical foundation for feasible regions of AC OPF problems. In this talk, a complete characterization of the feasible region of OPF problems will be presented. This complete stability property enables the development of solution methods for identifying the existence/non-existence of feasible solutions. In addition, practical applications of SuperOPF to large-scale power systems such as the Tokyo Electric Power Company, Tokyo, Japan, and PJM Interconnection, PA, USA will be illustrated.
2024年4月2日 (2/2)Ms. Wei Tian (Tianjin University, China)
TitleA User-Centered Bounded State Estimation in Power Grids: Theory and Method
AbstractThis talk presents an overview of state estimation in power systems, including the mathematical problem formulation and relevant works on state estimation in modern power systems. State-of-the-art techniques and challenges for state estimation are discussed, including the application of pseudo-measurements, metering instrument placement, network topology issues, and the impacts of renewable energy penetration. Both conventional and modern data-driven and probabilistic techniques have been reviewed. To meet the desired requirements of operators/users, a user-centered bounded (UCB) state estimation (SE) model will be introduced in this presentation. A theoretical foundation will be provided for the proposed UCB SE model/formulation. Furthermore, a theory-based numerical method will be presented to solve the UCB SE problem. The proposed UCB SE method is highlighted to offer a new direction for improving the practical application of power system state estimation.
備考大阪公立大学電力システム研究グループとの共催
2023年2月24日Professor Enoch Yeung (UC Santa Barbara)
TitleKoopman Operator Methods for Modeling Complex Biological Networks from Data
AbstractBiological networks in living cells are measured sparsely, both spatially and temporally. The advent of next generation sequencing methods enables profiling of large-scale biological networks with high-dimensional datasets. In this talk, I present our recent successes using and extending methods from Koopman operator theory to solve data-driven problems of sensor placement, sensor design, genetic marker identification, and finding hypercritical nodes for controlling growth rate in living cells. Lastly, I will overview our efforts to quantitatively reverse-engineer small-scale biological networks using our algorithm deep dynamic mode decomposition (deepDMD), including new theorems showing the effectiveness of mixed dictionaries in generating Koopman observable subspaces for approximating nonlinear governing equations.
2022年10月21日Dr. John Koo (ASTRI)
TitleDigital Twins for Industrial Robotics
Abstract

旧引原研関係 Invited Lecture

2018年3月26日Professor Vakhtang Putlkradze
TitleVariational approach to inertia, dissipation, and constraints realization
AbstractWe consider the problem of dissipative systems where the main part of dynamics can be described by Lagrangian methods. Such problems are frequently encountered in mechanical and electrical engineering problems. We shall focus mainly on the mechanical analogues of fluid-structure interaction, especially in the presence of friction. Variational approaches are particularly useful for deriving equations for arbitrary lagrangians. We discuss a variational approach to the dynamics of porous media by incorporating viscous forces in the variational principle. To elucidate the physics and mathematics of the problem, we study some simplified cases such as a pendulum with a moving viscous droplet. We show that the analog of Darcy's law for porous media (velocity proportional to force) in these simplified models comes from the short-term convergence to a 'constraint manifold' in a singular perturbation problem and the following long-term dynamics on that manifold. The resulting Darcy's law can reduce to either holonomic or non-holonomic constraint for the motion, depending on the physical realization. We then discuss the relevance of our results to other dissipative systems and outline methods that can be useful for other applications in Mechanical and Electrical Engineering.
PhotofileVakhtang2018.jpg
FundingJSPS
2016年10月27日Professor Juan M. Rivas-Davila (Stanford Univ)
題目TBA
写真
後援

2016年06月07日南 裕樹 先生 (奈良先端科学技術大学院大学)
題目制御のためのノイズシェーピング技術〜動的量子化器と予測ガバナ〜
写真
後援

2014年06月17日谷口 綾子 氏 (大阪大学)
題目都市家庭部門エネルギーエンドユースモデルの開発と省エネルギー政策評価への応用
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後援


2013年10月30日Prof. Nejila Parspour (Institute of Electrical Energy Conversion, University of Stuttgart)
題目Contactless Energy Transfer - Physical principles, technological set up and existing systems
写真fileLecture20131030.jpg 
後援

2013年10月15日Prof. Igor Mezic (UCSB)
題目Analysis of Dynamical Systems Using Koopman Operator Method
写真fileLecture20131015.jpg 
後援CREST

2013年6月13日平田 研二 先生 (長岡科学技術大学)
題目価格を利用した分散システムの最適運用状態への誘導に関する考察
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後援

2013年6月12日松嶋 徹 先生 (京都大学)
題目電子機器から生じる電磁雑音の高速予測法および低減設計法
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後援

2012年11月20日Professor S.G. Rump (Hamburg University of Technology)
題目Componentwise error bounds for the solution of least squares problems and underdetermined linear systems
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後援

2011年7月27日平田 研二 先生 (長岡科学技術大学)
題目斜面災害監視用センサーネットワークの起動・停止制御
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後援

2011年5月12日Prof. Alberto Castellazzi (The University of Nottingham)
題目INTEGRATION DRIVEN POWER ELECTRONICS TECHNOLOGY EVOLUTION
写真fileDr_Castellazzi1.jpg fileDr_Castellazzi2.jpg
後援GCOE

2011年1月21日大曲 祐子 氏 (大阪大学)
題目電力系統の安定性を説明する機械的立体(野田)モデルの実験的検証
場所京大桂キャンパス・引原研究室(A1-415)
後援

2010年8月31日津村 幸治 先生 (東京大学)
題目量子フィードバック制御理論の基礎
場所京大桂キャンパス・第一講義室(A1-001)
後援G-COE & KiDS

2009年8月20日Dr. Atsuto Maki (Toshiba Research Europe, Cambridge Research Laboratory)
題目ランダムフォレストによるクラスタリング
写真fileDr_Maki01.jpg fileDr_Maki02.jpg
後援

2009年4月8日Prof. C. K. Michael Tse (The Hong Kong Polytechnic University)
題目Interconnected Converters: Some Theory and Applications
写真fileDr_Tse01.jpg fileDr_Tse02.jpg
後援IEEE/LEOS関西支部 & G-COE

2008年10月29日Prof. Visarath In (San Diego State University)
題目Coupled Overdamped Bistable Systems and Applications
写真fileDr_In.jpg
後援KiDS & GCOE

2008年10月1日Dr. Leo Lorenz (Infineon Technology)
題目Fast Switching Power Semiconductor Devices
写真fileDr_Lorenz.jpg
後援GCOE

2008年9月24日Prof. Joachim Oberhammer (KTH Royal Institute of Technology)
題目FRF and microwave MEMS activities at KTH Royal Institute of Technology
写真fileDr_Oberhammer.jpg
後援GCOE

2008年5月23日Prof. Ho Bun Chan (Univ. of Florida)
題目Fluctuational phenomena in micromechanical systems - from Casimir effect to activated switching
写真fileChan01.jpg fileChan02.jpg
後援GCOE

2008年4月4日Prof. Vakhtang Putkaradze (Colorado State Univ.)
題目Continuum models for self-organization of micro- and nano-particles and dynamical models for biological curves
写真fileR0011123s.jpg
後援GCOE

2007年6月20日長谷川 晃朗 博士 (ATR)
題目無線ネットワークと非線形性
写真fileP1010067.JPG
後援

2007年3月31日Prof. Marian Wiercigroch (University of Aberdeen, College of Physical Sciences)
題目Dynamics of Non-smooth Systems
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後援KiDS

2007年3月11日滑川 徹 先生 (金沢大学)
題目制御工学に関する2,3のトピックス
写真fileP1010055.JPG
後援

2006年12月7日Dr. Pawel Pilarcyzk (Kyoto University, Mathematics Department)
題目Computational Dynamics and Cubical Homology
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2006年8月17日Prof. Igor Mezic (Mechanical Engineering Department, University of California, Santa Barbara)
題目Biomolecules as nonlinear oscillators: Life-enabling dynamics
写真
後援KiDS, 21世紀COEプログラム講演会

2006年7月12日Prof. Vakhtang Putkaradze (Colorado State University, Mathematics Department)
題目Mathematical models of self-aggregation of particles at nano-scales (or cheerios at 50 nanometers)
写真
後援KiDS, 21世紀COEプログラム講演会

2006年6月23日Prof. Juan Carlos Balda (University of Arkansas)
題目The Next Generation of Power Electronics Interfaces for High Power and High Voltage Distribution System Applications
写真
後援21世紀COEプログラム講演会

2006年5月23日Prof. Alan Mantooth (University of Arkansas)
題目Silicon Carbide Research Into High-Voltage Power Electronics for Extreme Environments
写真
後援21世紀COEプログラム講演会

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Last-modified: 2024-07-27 (土) 08:22:16 (74d)