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International Scientific Conference on Electric power engineering (EPE)

作者： Tomáš Hudač Jiri Drapela Leoš Kukačka Jan Meyer Robert Stiegler Dept. of Electrical Power Engineering Faculty of Elect. Eng. and Communication Brno University of Technology Brno Czech Republic Institute of Mechatronics and Computer Engineering Technical University of Liberec Liberec Czech Republic Institute of Electrical Power Systems and High Voltage Engineering Technische Universität Dresden Dresden Germany

Aim of the paper is to conduct a survey of the present market, focusing on the best-selling retrofit LED lamps and to analyze experimentally their fundamental EMC performance for subsequent classification of the LED drivers. Two stage experimental characterization testing approach is adopted. First, input current and output luminous flux in steady-state under nominal supply conditions is acquired. Next, transfer of input supply voltage interharmonics to output visible flicker components in terms of gain factor curves is obtained. Based on the achieved and discussed testing results, classification of the LED lamps is developed.

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Three-Phase SRF PLL Model for System Frequency Response Studies in Low-Inertia systems

Three-Phase SRF PLL Model for System Frequency Response Stud...

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IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia)

作者： Matej Krpan Igor Erceg Igor Kuzle Hrvoje Pandžić Department of Energy and Power Systems University of Zagreb Faculty of Electrical Engineering and Computing Zagreb Croatia Department of Electric Machines Drives and Automation University of Zagreb Faculty of Electrical Engineering and Computing Zagreb Croatia

ISBN: (纸本)9798350399677

This paper derives a small-signal model of a three-phase synchronous reference frame phase-locked loop for use in system frequency response studies assuming a system of balanced three-phase voltages. The small-signal model is described by a second-order transfer function which relates the actual to the estimated grid frequency. The small-signal model behaves identically to the large-signal model for small disturbances. Simulation results demonstrate that phase-locked loop dynamics can be neglected in the high-inertia scenarios, while in the low-inertia scenarios they have a significant impact on the grid frequency and should be included in models.

关键词： Analytical models Time-frequency analysis System dynamics power system dynamics Asia Transfer functions Frequency response

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Partially Isolated Multi-Active Bridge DC-DC Converter with Bidirectional EV Charging Ports

Partially Isolated Multi-Active Bridge DC-DC Converter with ...

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Compatibility in power Electronics (CPE)

作者： Mykola Lukianov Enrique Romero Cadaval Gabriele Arena Ryszard Strzelecki Faculty of Electrical and Control Engineering Gdańsk University of Technology Gdańsk Poland Power Electrical and Electronic Systems R+D Group University of Extremadura Badajoz Spain Institute for Technical Physics (ITEP) Karlsruhe Institute of Technology (KIT) Karlsruhe Germany

ISBN: (数字)9798350318265

ISBN: (纸本)9798350318272

There is a growing interest in multiport converters due to their ability to interconnect various energy sources and loads using reduced number of components. Regarding electric vehicle (EV) chargers connection, existing multiport solutions either lack scalability, featuring only one isolated charging port or the operation of ports depend on each other, complicating the converter control algorithm. This article proposes a partially isolated multi-active bridge (MAB) converter capable of connecting battery energy storage (BES) and an arbitrary number of EV chargers to the DC grid, aiming to resolve abovementioned problems. The proposed MAB converter requires 6N switches, whereas the conventional solution with independent 3-phase interleaved buck-boost and N DAB converters needs 8N+6 switches to connect BES and N EVs to the DC grid (N - odd number of EV charging ports). Simulation results have proven the ability of the converter ports to work independently in bidirectional operation modes for different BES and EV power levels.

关键词： power engineering Simulation Scalability Bridge circuits DC-DC power converters Switches Electric vehicle charging

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Electricity losses optimization in distribution networks from the perspective of integration on large scale of renewable energy resources 12

Electricity losses optimization in distribution networks fro...

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12th International Conference and Exposition on electrical and power engineering, EPE 2022

作者： Gorea, Cristian Bica, Dorin Dumitru, Cristian-Dragos Vlasa, Ilie Porumb, Radu Chiorean, Dragos Lucian University Politehnica of Bucharest Faculty of Energy Engineering Department of Electrical Power Systems Bucharest Romania 'George Emil Palade' University of Medicine Pharmacy Science and Technology of Targu Mures Faculty of Engineering and Information Technology Department of Electrical Engineering and Information Technology Târgu Mureş Romania Distributie Energie Electricǎ Romania S.A. Str. Ilie Mǎcelaru nr. 28A jud. Cluj Cluj-Napoca Romania

ISBN: (数字)9781665489942

ISBN: (纸本)9781665489942

This paper aims to present essential aspects in ensuring the operation in optimal quality conditions of the electricity distribution systems from the point of view of the stability of the supply voltage, the resilience of the distribution systems in the face of natural disasters, increasingly present in the recent period, through the use of NWA, non-wires alternatives technologies. The paper ends with a case study in which a network area is presented, in real mode, to which a series of prosumers have been aggregated showing the power flow in certain hours of the day and the energy losses in the presence of distributed generation, respectively in its absence. © 2022 IEEE.

关键词： Distributed power generation

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Enhancing Machine Learning Based Solar Generation Forecasting with Time Data Utilization

Enhancing Machine Learning Based Solar Generation Forecastin...

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IEEE PES GTD Grand International Conference and Exposition Asia (GTD Asia)

作者： Lejla Pašić Azra Pašić Alija Pašić István Vokony József Bíró Faculty of Electrical Engineering and Informatics Budapest University of Technology and Economics Budapest Hungary Department of Telecommunications and Media Informatics ELKH-BME Information Systems Research Group Budapest Hungary Department of Electric Power Engineering

Solar energy is expected to have a key role in the transition to a cleaner and environment-friendlier energy system, but given its highly weather dependent and intermittent nature, it creates operational challenges for the electric power grid because of the uncertainty involved in the output. Thus renewable energy generation forecasting becomes an increasingly important task in regard to not just the reliable operation of the energy system, but also from a financial standpoint. Here it is analyzed how the information carried by the timestamp can be utilized in order to improve solar generation forecasting accuracy. We devised and implemented our own time feature input, which we tested on several techniques based on machine learning for solar energy generation forecasting. In this paper, we demonstrate that, though often overlooked, the information carried by the timestamp is significant and can greatly improve the forecasting accuracy.

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Fault-Tolerant Current and Reactive power Predictive Control in a Multi-Modular 2-Level Indirect Matrix Converter

Fault-Tolerant Current and Reactive Power Predictive Control...

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Annual Conference of Industrial Electronics Society

作者： Fabian Palacios-Pereira Sergio Toledo Edgar Maqueda David Caballero Marco Rivera Jorge Rodas Raúl Gregor Laboratory of Power and Control Systems Faculty of Engineering Universidad Nacional de Asunción Luque Paraguay Department of Electrical and Electronic Engineering Faculty of Engineering University of Nottingham UK Laboratorio de Conversión de Energías y Electrónica de Potencia Universidad de Talca Chile Dept. of Research and Development Power Quality and Energy Solutions SRL Asunción Paraguay

ISBN: (数字)9781665464543

ISBN: (纸本)9781665464550

This paper studied the design of a predictive current control strategy with fault tolerance and reactive power minimization applied to a multi-modular topology based on indirect 2-level matrix converters fed by a six-phase generator. The control algorithm of the proposed strategy involves coupled current signals to perform error compensation between the converter modules, aiming to address potential system faults while maintaining reactive power close to zero. The results, obtained through simulation, were evaluated considering each module’s input and output currents and the final load current, as well as reactive power minimization, incorporating the obtained values of total harmonic distortion and mean squared error. The behaviour was analyzed in steady-state and transient conditions, with the system operating nominally and under fault conditions. The results demonstrate the effectiveness and good performance of the proposed strategy with the utilized topology, achieving a satisfactory response to faults through compensation and constant reactive power minimization.

关键词： Reactive power Fault tolerance Total harmonic distortion Fault tolerant systems Minimization Topology Steady-state Matrix converters Transient analysis Predictive control

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Optimal Control of Automatic Manipulator for Elimination of Galvanic Line Load Oscillation

Periodica polytechnica Electrical engineering and computer s...

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Periodica polytechnica electrical engineering and computer science 2021年第2期65卷 91-105页

作者： Autsou, Siarhei Rassõlkin, Anton Vaimann, Toomas Demidova, Galina Saroka, Viktor Karpovich, Dzmitry Kallaste, Ants Department of Automation of Production Processes and Electrical Engineering Faculty of Chemical Technology and Technique Belarussian State Technological University 13a Sverdlova str. Minsk220006 Belarus Department of Electrical Power Engineering and Mechatronics Tallinn University of Technology 5 Ehitajate street Tallinn19086 Estonia Faculty of Control Systems and Robotics Itmo University 49 Kronverksky Pr. St. Petersburg197101 Russia

This paper provides an analysis of the current state-of-The-Art technologies in the field of auto-operators used in production during the electroplating process. General schemes of operations are presented, benefits and drawbacks of each scheme are discussed. The paper discusses an increase in the operating efficiency of the auto-operator in transient conditions (braking and acceleration) by reducing suspension oscillations and provides an example of a similar problem from other industries. In addition to the classification of the auto-operators, three main ways and control methods of the auto-operator of a galvanic line are presented. The main ways of eliminating oscillations during the movement of the auto-operator, as well as the rationale for the choice of adaptive (optimal) control, based on and comparing the basic control algorithms of the robot manipulator, are discussed. The comparative analysis of algorithms used to determine the optimal control has been carried out. Application field of each optimal control method described, moreover advantages and disadvantages as well as implementation methods described. Bellman dynamic programming method was chosen to eliminate oscillations of the suspension with details during the auto-operator transient conditions, the chosen method takes into account all necessary conditions to achieve the desired result. © 2021 Budapest University of Technology and Economics. All rights reserved.

关键词： Dynamic programming

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Inductance Sizing Of Electric Motor Emulator Using Particle Swarm Optimization For Drive Train Applications

Inductance Sizing Of Electric Motor Emulator Using Particle ...

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International Middle-East power System Conference, MEPCON

作者： Amr Saleh Mahmoud Adel Philip Mawby Mohamed Taha Electrical department Faculty of Engineering Fayoum University Fayoum Egypt Electronics Power and Systems Department School of Engineering Warwick University Coventry UK

ISBN: (纸本)9781665463645

Testing and validation of traction inverters are crucial for battery electric vehicles and hybrid electric vehicles. Motor emulators are used to replace the complexity of having moving elements and to provide flexible system to test different inverter ratings and different motor types. The emulator system comprises of an inverter coupled with an inductor. The accurate selection of the inductance and resistance of the coupling inductors as well as the tuning of the PI controllers for the direct and quadrature components of the emulator inverter provides a sinusoidal current with very low ripples that can be very similar to the current provided by the equivalent electrical motor. In this work a particle swarm (PSO) optimization technique is retained to tune the PI parameters for the direct and quadrature currents controllers, as well as optimizing the resistance and inductance of the coupling inductor. The optimization is targeting the measured emulator current to coincide with the current of the simulated machine model. The presented methodology is validated using MATLAB Simulink simulation and the results shows a matching current value at different operating points and proven the fidelity of the proposed approach.

关键词： Inductance Torque Traction motors Inverters Mathematical models Inductors Particle swarm optimization

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Bilateral Contract for Load Frequency and Renewable Energy Sources Using Advanced Controller

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Computers, Materials & Continua 2022年第11期73卷 3165-3180页

作者： Krishan Arora Gyanendra Prasad Joshi Mahmoud Ragab Muhyaddin Rawa Ahmad H.Milyani Romany F.Mansour Eunmok Yang School of Electronics and Electrical Engineering Lovely Professional UniversityPhagwara144001PunjabIndia School of Department of Computer Science and Engineering Sejong UniversitySeoul05006Korea Information Technology Department Faculty of Computing and Information TechnologyKing Abdulaziz UniversityJeddah21589Saudi Arabia Centre for Artificial Intelligence in Precision Medicines King Abdulaziz UniversityJeddah21589Saudi Arabia Mathematics Department Faculty of ScienceAl-Azhar UniversityNaser City11884CairoEgypt Center of Research Excellence in Renewable Energy and Power Systems King Abdulaziz UniversityJeddah21589Saudi Arabia Department of Electrical and Computer Engineering Faculty of EngineeringKing Abdulaziz UniversityJeddah21589Saudi Arabia King Abdullah City for Atomic and Renewable Energy(K.A.CARE) RiyadhSaudi Arabia Department of Mathematics Faculty of ScienceNew Valley UniversityEl-Kharga72511Egypt Department of Information Security Cryptologyand MathematicsKookmin UniversitySeoul02707Korea

Reestablishment in power system brings in significant transformation in the power sector by extinguishing the possession of sound consolidated ***,the collaboration of various manufacturing agencies,autonomous power manufacturers,and buyers have created complex installation *** regular active load and inefficiency of best measures among varied associates is a huge *** sudden load deviation will give rise to immediate amendment in frequency and tie-line power *** is essential to deal with every zone’s frequency and tie-line power within permitted confines followed by fluctuations within the ***,it can be proficient by implementing Load Frequency Control under the Bilateral case,stabilizing the power and frequency distinction within the interrelated power *** the net deviation in multiple areas is possible by minimizing the unbalance of Bilateral Contracts with the help of proportional integral and advanced controllers like Harris Hawks *** proposed the advanced controller Harris Hawk optimizer-based model and validated it on a test *** experiment results show that the delay time is 0.0029 s and the settling time of 20.86 s *** model can also be leveraged to examine the decision boundaries of the Bilateral case.

关键词： Bilateral contract load frequency control optimization harris hawks optimizer

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Evaluation model of enhanced geothermal system projects based on multi-criteria decision-making

Evaluation model of enhanced geothermal system projects base...

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13th Mediterranean Conference on power Generation, Transmission, Distribution and Energy Conversion (MEDpower 2022)

作者： S. Raos J. Hranić I. Rajšl Department of Energy and Power Systems Faculty of Electrical Engineering and Computing Zagreb Croatia FieldCore Service Solutions Karlovac GA Croatia

This paper presents the main features and characteristics of the evaluation model of enhanced geothermal system projects based on multi-criteria decision-making. The model is a simulation model and evaluates the enhanced geothermal system projects in a holistic way. Considering geological setting characteristics, technology details, the economics of the project, social impact, and associated environmental impact enables a comprehensive assessment of such projects. The model is capable of calculating main performance metrics such as production quantities, losses, efficiencies, avoided CO2 emissions, and main economic metrics such as levelized cost of energy, the net present value of the project, yearly cash flows etc. Additionally, the model integrates a multi-criteria decision-making sub-module, enabling users to assess and compare different project options and scenarios.

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