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2025 International Conference on Electrical Automation and Artificial Intelligence, ICEAAI 2025

作者： Miao, Lu Fan, Wei Liu, Yu Yi, Yang Chen, Deyang Qin, Yingjie Yan, Lu Power Dispatch Control Center Guangdong Power Grid Co. System Analysis Department Guangzhou China Power Dispatching Control Center Guangdong Power Grid Corporation Guangzhou China School of Electric Power Engineering South China University of Technology Guangzhou China

ISBN: (纸本)9798331506797

Asymmetric faults in wind farms may cause fluctuations in active and reactive power, leading to a sharp drop in voltage. In order to reduce the impact of negative sequence current components, balance power fluctuations, and assist in wind turbine low-voltage fault crossing, the power model of grid connected converters during asymmetric faults in wind farms is analyzed, and traditional asymmetric fault control strategies are improved. A wind power asymmetric fault crossing control strategy based on zero sequence current is proposed, zero sequence currents are introduced to construct a zero sequence current control loop, which reduces the negative sequence current component generated by asymmetric faults in the wind farm and the fluctuation of active power in the wind farm, stabilizes the bus voltage. Finally, simulation confirms that the zero sequences current component improves the distribution of positive and negative sequence power, and reduces the fluctuation of grid connected current. © 2025 IEEE.

关键词： Asymmetric fault Bus voltage Current control loop Fault traversal Grid connected converter Negative sequence power Voltage fluctuations Zero sequence current

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Research on Asymmetric Fault Ride Through control Strategy for Wind Power Based on Three Sequence Current

Research on Asymmetric Fault Ride Through Control Strategy f...

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Electrical Automation and Artificial Intelligence (ICEAAI), International Conference on

作者： Lu Miao Wei Fan Yu Liu Yang Yi Deyang Chen Yingjie Qin Lu Yan System Analysis Department Power Dispatch Control Center Guangdong Power Grid Co. Guangzhou China Power Dispatching Control Center Guangdong Power Grid Corporation Guangzhou China School of Electric Power Engineering South China University of Technology Guangzhou China

ISBN: (数字)9798331506797

ISBN: (纸本)9798331506803

关键词： Current control Reactive power Fluctuations Voltage fluctuations Power quality Wind farms Wind power generation Power system stability Automatic voltage control Wind turbines

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Tracking the carbon footprint of global generative artificial intelligence

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Innovation 2025年第5期6卷 100866页

作者： Ding, Zhaohao Wang, Jianxiao Song, Yiyang Zheng, Xiaokang He, Guannan Chen, Xiupeng Zhang, Tiance Lee, Wei-Jen Song, Jie State Key Lab of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing102206 China National Engineering Laboratory for Big Data Analysis and Applications Peking University Beijing100871 China Department of Electrical and Electronic Engineering University of Hong Kong Hong Kong999077 China Department of Industrial Engineering and Management College of Engineering Peking University Beijing100871 China Jan C. Willems Center for Systems and Control University of Groningen Groningen9700AB Netherlands Energy Systems Research Center University of Texas at Arlington ArlingtonTX76019 United States

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Identification and optimal control of fructo-oligosaccharide production

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IFAC-PapersOnLine 2018年第18期51卷 678-683页

作者： Schorsch, J. Kinnaert, M. Fekih-Salem, R. Dewasme, L. Castro, C.C. Wouwer, A. Vande Department of Control Engineering and System Analysis Université libre de Bruxelles Belgium Automatic Control Laboratory University of Mons Belgium LAMSIN University of Tunis El Manar Tunisia Applied Chemistry and Biochemistry Department University of Mons Belgium

This article deals with the development of a reduced model describing the temporal evolution of the fructo-oligosaccharide production by Aureobasidium pullulans and the optimal process control. First, a reduced model is derived from a detailed model reproducing with good accuracy the dynamics of the fructo-oligosaccharide production. The reduced model is obtained using maximum likelihood principal component analysis and parameter identification based on a weighted least squares criterion. Next, the fructo-oligosaccharide concentration at an a priori undetermined time is maximized using Pontryagin maximum principle. The methodology is analyzed based on experimental data from batch and fed-batch cultures, and results are compared with those obtained with another simple model available in the literature. © 2018

关键词： Maximum likelihood estimation Bang bang control systems Batch cell culture Biotechnology Maximum principle Oligosaccharides Parameter estimation Principal component analysis Aureobasidium pullulans Bang Bang control Detailed modeling Fed batch cultures Fructo oligosaccharides Optimal controls Temporal evolution Weighted least squares

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Secure Dynamic State Estimation by Decomposing Kalman Filter

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IFAC-PapersOnLine 2017年第1期50卷 7351-7356页

作者： Liu X. Mo Y. Garone E. School of Electrical and Electronic Engineering Nanyang Technological University Singapore Control and System Analysis department Université Libre de Bruxelles Brussels Belgium

We consider the problem of estimating the state of a linear time-invariant Gaussian system in the presence of sparse integrity attacks. The attacker can control p out of m sensors and arbitrarily change the measurements. Under mild assumptions, we can decompose the optimal Kalman estimate as a weighted sum of local state estimates, each of which is derived using only the measurements from a single sensor. Furthermore, we propose a convex optimization based approach, instead of the weighted sum approach, to combine the local estimate into a more secure state estimate. It is shown that our proposed estimator coincides with the Kalman estimator with certain probability when all sensors are benign, and we provide a sufficient condition under which the estimator is stable against the (p, m)-sparse attack when p sensors are compromised. A numerical example is provided to illustrate the performance of the proposed state estimation scheme. © 2017

关键词： Cyber-physical systems Optimization Security State estimation

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Special Aspects of the Kinetics of Reactive Ion Etching of SiO2 in Fluorine-, Chlorine-, and Bromine-Containing Plasma

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Russian Microelectronics 2020年第2期49卷 94-102页

作者： Efremov, A.M. Murin, D.B. Betelin, V.B. Kwon, K.-H. Department of Technology of Instruments and Materials of Electronic Engineering Ivanovo State University of Chemistry and Technology Ivanovo153000 Russia Scientific Research Institute of System Analysis Moscow117218 Russia Department of Control and Instrumentation Engineering Korea University Sejong339-700 Korea Republic of

Abstract: The influence of the type of active gas and the ratio of the concentration of the components of the CF4 + Ar, Cl2 + Ar, and HBr + Ar mixtures on the parameters of the plasma, steady-state concentrations of the active particles, and kinetics of reactive-ion etching of SiO2 is investigated. It is demonstrated that the rate of etching SiO2 decreases in the CF4–Cl2–HBr series and is characterized by nonmonotonic (with the maximum at 20–25% Ar) behaviour under the variation of the initial composition of the mixtures. It is found that the reasons for the nonmonotonicity for each of the mixtures are the increased effective probability of the interaction and decreased yield of etching due to the change in the physical parameters of the plasma and densities of the fluxes of the active particles. © 2020, Pleiades Publishing, Ltd.

关键词： Silica

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Reconfigurable control of Input Affine Nonlinear systems under Actuator Fault

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IFAC-PapersOnLine 2015年第21期48卷 345-352页

作者： Tabatabaeipour, S. Mojtaba Galeazzi, Roberto System Operation Analysis Energinet.dk Tonne Kjærsvej 65 Fredericia Denmark Automation and Control Department of Electrical Engineering Technical University of Denmark Kgs. Lyngby Denmark

This paper proposes a fault tolerant control method for input-affine nonlinear systems using a nonlinear reconfiguration block (RB). The basic idea of the method is to insert the RB between the plant and the nominal controller such that fault tolerance is achieved without re-designing the nominal controller. The role of the RB is twofold: on one hand it transforms the output of the faulty system such that its behaviour is similar to that of the nominal one from the controller's viewpoint;on the other hand it modifies the control input to the faulty system such that the stability of the reconfigured loop is preserved. The RB is realized by a virtual actuator and a REFERENCE model. Using notions of incremental and input-to-state stability (ISS), it is shown that ISS of the closed-loop reconfigured system can be achieved by the separate design of the virtual actuator. The proposed method does not need any knowledge of the nominal controller and only assumes that the nominal closed-loop system is ISS. The method is demonstrated on a dynamic positioning system for an offshore supply vessel, where the virtual actuator is designed using backstepping. © 2015

关键词： Backstepping

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Constrained extremum seeking: A modified-barrier function approach 11

Constrained extremum seeking: A modified-barrier function ap...

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11th IFAC Symposium on Nonlinear control systems, NOLCOS 2019

作者： Labar, Christophe Garone, Emanuele Kinnaert, Michel Ebenbauer, Christian Department of Control Engineering and System Analysis Université libre de Bruxelles Brussels1050 Belgium Institute for Systems Theory and Automatic Control University of Stuttgart Stuttgart70569 Germany

In this paper, we address the problem of steering the input of a convex function to a value that minimizes the function under a convex constraint. We consider the case where the constraint cannot be violated of more than a user-defined value during the whole transient phase. The mathematical expression of both the cost function and the constraint are assumed to be unknown. The only information available are the on-line values of the cost and the constraint. To tackle this problem, an optimization law, based on a modified-barrier function, and involving the gradient of both the cost function and the constraint, is firstly designed. The Lie bracket formalism is then exploited to approximate this law, by combining time-periodic signals with the on-line measurements of both the cost and the constraint. The stability property of the resulting constrained extremum seeking system is proved, and its effectiveness is shown in simulation. © 2019, IFAC (International Federation of Automatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Cost functions

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Distributed Sensor Fault Detection and Isolation over Network

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IFAC Proceedings Volumes 2014年第3期47卷 11458-11463页

作者： Michel Kinnaert Jingjing Hao Department of Control Engineering and System Analysis Université libre de Bruxelles (ULB)

Consensus and diffusion based observers have been developed to address distributed state estimation over a sensor network. In this paper, the way sensor faults affect the state estimation of such distributed state observers is investigated. Next, a methodology to design a distributed system for sensor fault detection and isolation (FDI) is proposed. The aim is to achieve a specified fault detection (FD) performance while limiting the complexity of the algorithm at each node of the sensor network. To this end, proper selection of the measurements used for FDI at each node is performed thanks to a fault distinguishability measure based on the Kullback-Leibler divergence.

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Sensorless Vector control for Grid Synchronization of Doubly-Fed Induction Generators

Sensorless Vector Control for Grid Synchronization of Doubly...

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2022 International Conference on Electrical Machines, ICEM 2022

作者： Yahiaoui, Mohamed-Amine Kinnaert, Michel Gyselinck, Johan Université Libre de Bruxelles Bio Electro and Mechanical Systems Department Brussels Belgium Université Libre de Bruxelles Control Engineering and System Analysis Department Brussels Belgium

ISBN: (数字)9781665414326

ISBN: (纸本)9781665414326

Wind turbine systems (WTSs) based on a doubly-fed induction generator (DFIG) are widely used in the wind power industry. In the DFIG topology, the stator winding is directly connected to the grid. This topology requires some caution during grid synchronization to avoid undesired overcurrent. In this context, this paper proposes a new control strategy to improve the connection of the DFIG to the grid. An augmented state and disturbance observer estimates the direct and quadrature components of the stator voltage. These components are used to ensure soft and fast synchronization of the DFIG to the grid. This can be achieved by controlling the rotor current in a synchronous reference frame to adjust the open-circuit stator voltage to follow the grid voltage. Numerical simulation and hardware implementation results verify the efficiency and effectiveness of the proposed control scheme. © 2022 IEEE.

关键词： Topology

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