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63rd IEEE Conference on Decision and control, CDC 2024

作者： You, Jiawei Dai, Xinliang Jiang, Yuning Yin, Haoyu Shi, Yuanming Jones, Colin N. ShanghaiTech University School of Information Science and Technology China Epfl Switzerland Karlsruhe Institute of Technology Institute for Automation and Applied Informatics Germany Epfl Automatic Control Laboratory Switzerland Washington University in St. Louis Department of Electrical and Systems Engineering United States

ISBN: (纸本)9798350316339

This paper explores the impact of the burgeoning electric vehicle (EV) presence on distribution grid operations, highlighting the challenges they present to conventional pricing strategies due to their dual role as power consumers and suppliers, coupled with their energy storage capabilities. We propose an advanced real-time pricing model for the electricity market, employing a novel distributed bilevel optimization framework. This framework distinguishes between the distribution system operator (DSO) at the upper level and the EVs at the lower level, each aiming to optimize profit margins. The optimization includes power flow constraints at the upper level to ensure efficient operation within safe system limits, while model predictive control (MPC) is used to optimize lower-level EV responses. Additionally, we provide a rigorous convergence analysis of the proposed bilevel optimization method. Detailed convergence studies and simulation results demonstrate the effectiveness and superiority of the proposed algorithm. © 2024 IEEE.

关键词： Predictive control systems

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Input and state constrained inverse optimal control with application to power networks

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IFAC-PapersOnLine 2023年第2期56卷 5451-5456页

作者： Taouba Kaouther Jouini Zhiyong Sun Venkatraman Renganathan Veit Hagenmeyer Institute of Automation and Applied Informatics (IAI) at Karlsruhe Institute of Technology Germany Department of Electrical Engineering Eindhoven University of Technology Netherlands Department of Automatic Control LTH Lund University Sweden

We study input and state constrained inverse optimal control problems starting from a stabilizing controller with a control Lyapunov function, where the goal is to make the controller an explicit solution of the resulting constrained optimal control problem. For an appropriate cost design and initial states for which a sublevel set of the Lyapunov function is contained in the state constraint set and the initial input lies on an ellipsoid inside the input constraint set, we show that the stabilizing controller solves the constrained optimal control problem. Compared to the state-of-the-art, we avoid solving nonlinear optimization problems evaluated pointwise, i.e., for every state, or in a repetitive fashion, i.e., at each time step. We apply our theoretical results to study the angular droop control studied in (Jouini et al., 2022) of an inverter-based power network. For this, we accommodate the constraints on the angle and power generation and exemplify our approach through a two-inverter case study.

关键词： Optimal control Non-Linear control Systems Networked Systems Power and Energy Systems

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Improving dynamics of vector controlled IM drive by resampling SVM under low frequency ratio

Improving dynamics of vector controlled IM drive by resampli...

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International Conference on Electrical Machines, ICEM

作者： Péter Stumpf Rafael K. Járdán István Nagy István Vajk Department of Automation and Applied Informatics Budapest University of Technology and Economics MTA-BME Control Engineering Research Group Budapest Hungary

ISBN: (纸本)9781479943883

Field Oriented control (FOC) technique is one of the most frequently applied algorithm to control the torque and the speed of a three-phase electric drive. The paper focuses on high speed or high-pole count motor FOC drives when both the sampling over reference frequency ratio F and the carrier over reference frequency m f is low. The paper presents that the stability range of a speed sensor-less FOC motor drive can be extended by recalculating the reference signal of the Space Vector Modulation algorithm at the negative peak of the carrier signal as well by approximating the rotor flux angle change over one half carrier period. The result was verified by computer simulations and laboratory measurements.

关键词： Support vector machines Resistors Torque Stators Current measurement Pulse width modulation Rotors

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Stability of digitally controlled PFC boost converter with auxiliary state vector

Stability of digitally controlled PFC boost converter with a...

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IEEE International Symposium on Industrial Electronics (ISIE)

作者： Péter Stumpf András Lőrincz István Nagy MTA-BME Control Engineering Research Group Budapest Hungary Department of Automation and Applied Informatics Budapest University of Technology and Economics

ISBN: (纸本)9781467351942

Power Factor Correction (PFC) converters belong to the variable structure piecewise linear systems due to the switching action. Their complex behaviour is intensively studied. Present paper represents a stability analysis method using the so-called auxiliary state vector to determine the Jacobian matrix of the Poincare Map Function (PMF) to calculate the critical angle where oscillations developes in the inductor current. The effect caused by the Zero-Order Hold, the digital computation delays and the nonideal circuit elements are taken into consideration. The computation delay was approximated by using first and second order Padé approximation. The theoretic results are verified by simulation and the experiment results.

关键词： Stability analysis Vectors Approximation methods Circuit stability Switches Delays Voltage control

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Novel approach of microgrid control

Novel approach of microgrid control

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International Conference on Renewable Energy Research and Applications (ICRERA)

作者： Péter Stumpf István Nagy István Vajk Department of Automation and Applied Informatics Budapest University of Technology and Economics MTA-BME Control Engineering Research Group Budapest Hungary

A novel microgrid control is proposed in the paper. Independent control of active and reactive power for each unit connected to the common microgrid bus is realized in addition to the power sharing in the designed ratio among the units. The concepts of voltage droop and frequency droop applied widely are incorporated here as well. The price paid for the independent control is the reference frame transformation needed in the novel control.

关键词： Microgrids Voltage control Vectors Reactive power Power conversion Renewable energy sources

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State space control of quadratic boost converter using LQR and LQG approaches

State space control of quadratic boost converter using LQR a...

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International Aegean Conference on Electrical Machines and Power Electronics, ACEMP

作者： Bence Kurucsó Alfréd Peschka Péter Stumpf István Nagy István Vajk Department of Automation and Applied Informatics Budapest University of Technology and Economics MTA-BME Control Engineering Research Group Budapest Hungary

The systematic design of a Linear Quadratic Regulator (LQR) state-feedback controller with an integral action is presented for a quadratic DC/DC boost converter topology. The weighting factors are selected with respect to energy considerations. By using a Kalman Filter for both filtering and state estimation purpose a Linear Quadratic Gaussian (LQG) controller is obtained. For the proper operation of the LQG controller an average state-space model of the quadratic boost converter with non ideal elements is introduced. Detailed simulation study in the discrete time-domain is presented demonstrating the robustness of both LQR and LQG. Laboratory tests results are shown for LQR.

关键词： Switches Mathematical model Steady-state Voltage control Aerospace electronics Matrix converters

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Experimental verification of design methods for conventional PI/PID controllers

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WSEAS Transactions on Systems and control 2010年第5期5卷 269-280页

作者： Matušů, Radek Prokop, Roman Department of Automation and Control Engineering Faculty of Applied Informatics Tomas Bata University Nad Stráněmi 4511 76005 Zlín Czech Republic

The paper presents an experimental verification of conventional PI and PID controller design methods. Nine different synthesis techniques were used to control of airflow speed in laboratory model of hotair tunnel, most of them for both PI and PID version. In the first instance the controlled plant was identified in order to obtain a linear mathematical model and then the controllers were designed using studied methods. The controllers were tested in simulations and subsequently implemented under real conditions. The obtained control results have been compared and analyzed.

关键词： Three term control systems

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A persistent cross-platform class objects container for C++ and wxWidgets

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WSEAS Transactions on Computers 2009年第5期8卷 778-787页

作者： Bližnák, Michal Dulík, Tomáš Vašek, Vladimír Department of Applied Informatics Faculty of Applied Informatics Tomas Bata University Nad Stráněmi 4511 760 05 Zlín Czech Republic Department of Automation and Control Engineering Faculty of Applied Informatics Tomas Bata University Nad Stráněmi 4511 760 05 Zlín Czech Republic

This paper introduces a new open-source cross-platform software library written in C++ programming language which is able to serialize and deserialize hierarchically arranged class instances and their data members via XML files. The library provides easy and efficient way for processing, storing and managing complex object-oriented data with relationships between object instances. The library is based on mature cross-platform toolkit called wxWidgets and thus can be successfully used on many target platforms such as MS Windows, Linux or OS X. The library is published under open source licence and can be freely utilised in both open source and commercial projects. In this article, we describe the inner structure of the library, its key algorithms and principles and also demonstrate its usage on a set of simple examples.

关键词： Containers

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Iterative Feedback Tuning Approach to Development of PI-Fuzzy controllers

Iterative Feedback Tuning Approach to Development of PI-Fuzz...

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IEEE International Conference on Fuzzy Systems (FUZZ-IEEE)

作者： Radu-Emil Precup Zsuzsa Preitl Stefan Preitl Department of Automation and Applied Informatics Polytechnic University of Timisoara Timisoara Romania Department of Control and Transport Automation Budapest University슠of슠Technology슠and슠Economics Budapest Hungary

The paper proposes an original development method of Pi-fuzzy controllers. Accepting the controlled plants being described with simplified linear mathematical models, the method starts with linear PI controller development in terms of Iterative Feedback Tuning expressed in discrete-time. It is accompanied by a linear development method applied in delta domain. Next, the results of the linear development are transferred to the development of the fuzzy blocks in PI-fuzzy controllers by the modal equivalence principle, resulting in new two-degree-of-freedom Mamdani Pi-fuzzy controllers. Realtime experimental results in controlling a nonlinear servo-system validate the development method, where the linear development is performed using the Extended Symmetrical Optimum method.

关键词： Iterative methods Feedback Fuzzy control control systems Automatic control Three-term control automation Cascading style sheets informatics Sampling methods

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On the errors-in-variables extended Kalman filter

On the errors-in-variables extended Kalman filter

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International Conference on Computational Cybernetics (ICCC)

作者： K. J. Burnham B. Vinsonneau R.-E. Precup S. Preitl Control Theory and Applications Centre Coventry University Coventry UK Department of Automation and Applied Informatics Politehnica University Timisoara Timisoara Romania

ISBN: (纸本)9781424474325

Motivation for this paper stems from the need to deal with systems in which uncertainty exists on the measured signals and in the parameters of an assumed system model of known structure, and/or where the LTI assumption no longer holds. The potential of the a approach presented here is demonstrated when it is applied to a system in the presence of both an imposed mismatch in the model parameters as well the case of time-varying parameters. The effectiveness of the new EIV-EKF procedure is compared with that of an EIV Kalman filter, and evaluated on both single-input single-output and multiple-input multiple-output systems.

关键词： Additive noise MIMO Filtering Electronic mail Time varying systems Noise measurement automation informatics Automatic control Nonlinear filters

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