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2024 International Conference on Industrial engineering, Applications and Manufacturing, ICIEAM 2024

作者： Mestnikov, Nikolay Alzakkar, Ahmad Samofalov, Yuri Institute Of Physical And Technical Problems Of North Sb Ras North-Eastern Federal University Yakutsk Russia Albaath University Faculty Of Mechanical And Electrical Engineering Homs Syria Institute Of Electric Power Systems And Network Kazan State Power Engineering University Kazan Russia

ISBN: (纸本)9798350395013

The purpose of the article is to study of the possibility of placing photovoltaic solar installations inside a domed structure located at North-Eastern Federal University (NEFU) in Yakutsk by preserving a significant share of power generation and determining the optimal distance between the photovoltaic solar installation and the transparent walls of the dome structure. The authors obtained: control parameters for reducing the luminous flux, the generation power of a photovoltaic installation when the operating environment changes and optimal distance for placing a photovoltaic solar installation inside a dome structure in order to reduce surface pollution of a photovoltaic solar installation. It was found that operating photovoltaic solar installations inside a transparent dome structure, the generation power drops 25.61% when compared with actual generation data in open space. It was determined that by increasing the distance between the transparent walls of the dome and the installation, the generation power drops 23% in the range (0→1.5m). © 2024 IEEE.

关键词： Domes

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Sensorless Control of Synchronous Reluctance Motors based on Newton-Raphson Iteration Algorithm 3

Sensorless Control of Synchronous Reluctance Motors based on...

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3rd International Conference on electrical Machines and Drives, ICEMD 2023

作者： Nikmaram, Behnam Mousavi, Mahdi S. Khalaji, Zahra Davari, S. Alireza Rodriguez, Jose Fazeli, Mehdi Shahid Rajaee Teacher Training University Department of Electrical Engineering Tehran Iran Raja University Faculty of Technical and Engineering Qazvin Iran Universidad San Sebastian Faculty of Engineering Santiago Chile IRIEE ACECR Department of Electrical Converters and Power Systems Tehran Iran

ISBN: (纸本)9798350393743

In this paper, a position estimation algorithm is proposed for sensorless control of synchronous reluctance motors (SynRMs) using the Newton function and a closed-loop flux model. The proposed method is a phase-locked loop (PLL) technique, in which the classic proportional-integral (PI) controller is replaced by a Newton-Raphson (NR) iteration algorithm. Hence, the problem of designing PI coefficients is resolved. The active flux concept is utilized as the Newton function. To obtain the active flux, a closed-loop flux model is presented using nonlinear feedback. This methodology compensates for uncertainties such as parameter mismatch, DC offsets, and inaccurate sensor gain errors to ensure the precise estimation of the position in medium and high-speed ranges. The NR-based PLL is converged only in three iterations. Therefore, the dynamic response of the proposed method is faster than using a classic PI controller. The proposed method is validated through MATLAB-Simulink simulations and experimental tests. The results show the fast and robust performance of the position estimation in various test conditions. © 2023 IEEE.

关键词： Phase locked loops

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Experimental Verification of Grid Inverter Operation in Urban Environment 11

Experimental Verification of Grid Inverter Operation in Urba...

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11th International Conference on electrical, Electronic and Computing engineering, IcETRAN 2024

作者： Petronijević, Milutin Radonjić, Ivana Veselić, Boban Dimitrijević, Marko Milosavljević, Ćedomir Pantić, Lana University of Niš Faculty of Electronic Engineering Power Engineering Department Niš Serbia University of Niš Faculty of Sciences and Mathematics Department of Physics Niš Serbia University of Niš Faculty of Electronic Engineering Control Systems Department Niš Serbia University of Niš Faculty of Electronic Engineering Department of Electronics Niš Serbia University of East Sarajevo Faculty of Electrical Engineering East Sarajevo Bosnia and Herzegovina

ISBN: (纸本)9798350386998

This study offers experimental testing of commercial and laboratory inverters, utilized in a laboratory prototype of an urban microgrid. Operation of grid inverters supplied by PV arrays in urban environments, encounters challenges such as partial shading and soiling. Emulation of the current-voltage characteristics of PV arrays enables repeated and reliable testing of inverter operation under irregular supply conditions. It has been shown that finding the maximum power point can be challenging under conditions of partial shading and soiling. Additionally, meeting the grid quality standards for the delivered power represents a challenge. Satisfying these requirements can be achieved through careful design of LCL filters at inverter output terminals, but further improvement can be achieved only through an adequate selection of the primary controller. To further improve the quality of grid currents, the possibility of applying innovative control algorithms has been demonstrated for laboratory inverters. Application of sliding mode controllers, besides ensuring system robustness, can prevent overshoots and fault responses from the current protection circuit by introducing a specific anti-windup structure. © 2024 IEEE.

关键词： Sliding mode control

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New Stability Concept for Primary Controlled Variable Speed Wind Turbines Considering Wind Fluctuations and power Smoothing

New Stability Concept for Primary Controlled Variable Speed ...

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作者： Spichartz, Benedikt Gunther, Katharina Sourkounis, Constantinos Institute for Power Systems Technology and Power Mechatronics Faculty of Electrical Engineering and Information Technology Ruhr University Bochum Bochum Germany

With a further expansion of the wind energy sector, wind turbines (WTs) have an increasing impact on grid stability. Requirements for a grid connection are adapted continuously, especially for frequency support and the fault ride through (FRT) behavior of WTs. Besides the objectives of robust operational stability and maximum energy yield, a smooth of active power is also of interest to reach efficient load to generation balancing of the grid. With stochastic wind fluctuations, power smoothing methods gain importance, but in combination with primary power control, operation points (OPs) with the risk of operational instability occur. In these OPs with speeds below the maximum power point (MPP), a deceleration of the drive train to standstill is possible. While, so far, to ensure a stable operation especially variable droop is preferred for a WT with power controlled generator, a method to guarantee stability on conventional controller principles with constant droop is missing. Therefore, in this article, a control structure with power smoothing, constant droop, and a stabilizing limitation called MPP-limiter is presented, which ensure robust operational stability of the WT without requirements for additional safety margins. Therewith, the provision of the full primary control power is possible. Based on theoretical investigations, parameter studies, individual scenarios, and test bench results, the demand for the MPP-limiter from a stability perspective is shown. Advantages of the power smoothing and its effect on the energy yield are explained, like an increase of $6\,\mathrm{\%}$ of total energy in the transition range between partial and full load. © 1972-2012 IEEE.

关键词： Wind power

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Meter-length REBCO ultralow resistance joint for the gigahertz NMR magnet

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Superconductivity 2024年第4期12卷 112-121页

作者： Xiaoru Tian Hongli Suo Zili Zhang Maolai Ye Lei Wang Jianhua Liu Qiuliang Wang Key Laboratory of Advanced Functional Materials Ministry of EducationFaculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100022China Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of High Density Electromagnetic Power and Systems Chinese Academy of SciencesInstitute of Electrical EngineeringBeijing 100190China

In this paper,we present a meter‐length REBCO joint using the most conventional soldering *** joint resistance can attain 7.21×10^(‐11)Ωat 4.2 K with a joint length of 2 *** essentially displays a linear relation-ship with the joint *** microstructures of the joints were investigated systematically using scanning electron microscopy(SEM)and micro‐computed tomography(micro‐CT).Multiple voids were identified in all the *** importantly,the voids were not distributed *** internal voids near the innermost and outermost rings were larger than those in the middle *** types of gigahertz magnetic res-onance spectroscopy(NMR)magnets were designed:15 T low temperature superconductor(LTS)+15 high temperature superconductor(HTS)and whole *** current 10^(‐11)Ω‐level joint can satisfy the magnetic field decay criterion of 1×10^(‐8)/***,a pure HTS gigahertz NMR magnet requires a joint length of over 20 m,which is not *** current resistance resource of the meter‐length joint was also discussed by an equivalent circuit *** paper presents a reliable engineering REBCO joint fabrication method for giga-hertz NMR magnets without heat treatment.

关键词： REBCO Jaint Rsitance Miao-CT NMR magnet

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Performance Optimisation of Switched Reluctance Motor Drive using TLBO based Controller 2

Performance Optimisation of Switched Reluctance Motor Drive ...

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2nd International Conference on power, Control and Computing Technologies, ICPC2T 2022

作者： Farhanuddin, Mohd Khan, Sikandar Ali Bhowmick, Suman Delhi Technological University Power Systems Department of Electrical Engineering Delhi India Delhi TechnologicalUniversity Faculty Department of Electrical Engineering Delhi India

ISBN: (纸本)9781665458580

This paper presents a population centric teaching-learning based optimisation (TLBO) technique for optimizing performance of switched reluctance motor (SRM) drives. SRMs have proven to be a good substitute of Permanent Magnet (PM) motors despite minor disadvantages like noise, vibration, and torque ripple. In this work, TLBO is used to compute the turn-on and turn-off angles of the stator phase windings to optimise a multi-objective function comprising the SRM drive performance indices like average torque, torque per unit copper loss and softness factor (inverse of the torque ripple factor). Two real time controllers have been used to tune the turn-on and turn-off angles of the stator phase windings. The optimal turn-on and turn-off angles are used to generate the gate pulses for the converter switches. A hysteresis controller is incorporated to regulate the stator current between prescribed limits. The entire model was developed in SIMULINK. The improved SRM performance indices show the effectiveness of the proposed controller. © 2022 IEEE.

关键词： Vibrations Torque Windings Stator windings Switched reluctance motors Logic gates Control systems

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Transient stability improvement of Croatian power system using FACTS 11

Transient stability improvement of Croatian power system usi...

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11th International Conference on Innovative Smart Grid Technologies - Asia, ISGT-Asia 2022

作者： Šešok, Anica Pavić, Ivica University of Zagreb Faculty of Electrical Engineering and Computing Dept. of Energy and Power Systems Zagreb Croatia

ISBN: (纸本)9798350399660

In the last twenty years, the share of renewable energy sources (RES) in total electricity production has increased significantly, which has led to certain problems in power system operation. In systems with a significant share of RES, connected to the transmission network via power electronics devices, the inertial response of the system is reduced. Due to the reduced inertia of the power system, synchronous generators are more sensitive to their disturbed states and as a result, can easily lose stability. Loss of stability of one generator can lead to failure of other system elements, which may ultimately result in partial or even complete breakdown of the power system. Recently, a large increase in production from renewable sources has been recorded in the Croatian power system, therefore this paper investigates their impact on the system's transient stability and the possibilities of its improvement using Flexible AC Transmission systems (FACTS). © 2022 IEEE.

关键词： Flexible AC transmission systems

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Evolutionary Optimization Methods for High-Dimensional Expensive Problems:A Survey

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IEEE/CAA Journal of Automatica Sinica 2024年第5期11卷 1092-1105页

作者： MengChu Zhou Meiji Cui Dian Xu Shuwei Zhu Ziyan Zhao Abdullah Abusorrah Department of Electrical and Computer Engineering New Jersey Institute of TechnologyNewarkNJ 07102 USA School of Information and Electronic Engineering Zhejiang Gongshang UniversityHangzhou 310018China School of Intelligent Manufacturing Nanjing University of Science and TechnologyNanjing 210094China Institute of Systems Engineering Macao University of Science and TechnologyMacao 999078China School of Artificial Intelligence and Computer Jiangnan UniversityWuxi 214122China School of Information Science and Engineering Northeastern UniversityShenyang 110819China Center of Research Excellence in Renewable Energy and Power Systems Department of Electrical and Computer EngineeringFaculty of EngineeringKing Abdulaziz UniversityJeddah 21589Saudi Arabia K.A.CARE Energy Research and Innovation Center King Abdulaziz UniversityJeddah 21589Saudi Arabia

Evolutionary computation is a rapidly evolving field and the related algorithms have been successfully used to solve various real-world optimization *** past decade has also witnessed their fast progress to solve a class of challenging optimization problems called high-dimensional expensive problems(HEPs).The evaluation of their objective fitness requires expensive resource due to their use of time-consuming physical experiments or computer ***,it is hard to traverse the huge search space within reasonable resource as problem dimension *** evolutionary algorithms(EAs)tend to fail to solve HEPs competently because they need to conduct many such expensive evaluations before achieving satisfactory *** reduce such evaluations,many novel surrogate-assisted algorithms emerge to cope with HEPs in recent *** there lacks a thorough review of the state of the art in this specific and important *** paper provides a comprehensive survey of these evolutionary algorithms for *** start with a brief introduction to the research status and the basic concepts of ***,we present surrogate-assisted evolutionary algorithms for HEPs from four main *** also give comparative results of some representative algorithms and application ***,we indicate open challenges and several promising directions to advance the progress in evolutionary optimization algorithms for HEPs.

关键词： computer optimization evolutionary

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Revealing the Significance of Time Delays on the Performance of Diverse Source power systems under Fruit Fly Optimization Tuned 3DOFTID Regulator 5

Revealing the Significance of Time Delays on the Performance...

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5th International Youth Conference on Radio Electronics, electrical and power engineering, REEPE 2023

作者： Kalyan, Ch. Naga Sai Goud, B. Srikanth Reddy, Ch. Rami Bajaj, Mohit Tulsky, Vladimir N. Kamel, Salah Vasireddy Venkatadri Institute of Technology Electrical and Electronics Engineering Guntur522 508 India Anurag University Electrical and Electronics Engineering Hyderabad500 088 India Malla Reddy Engineering College Electrical and Electronics Engineering Secunderabad500 100 India Department of Electrical Dehradun248002 India Moscow Power Engineering Institute Electrical Power Systems Department Moscow111250 Russia Aswan University Faculty of Engineering Department of Electrical Engineering Aswan81542 Egypt

ISBN: (纸本)9798350399523

This paper limelight's the importance of reckoning the practical constraint of time delays (TDs) on the interconnected power system (IPS) performance. The analysis is performed on the diverse source two-area (TADS) IPS for a disturbance in step load (SLD) of 10% on area 1. Fruit fly optimization (FFO) tuned 3-degree-of-freedom tilt-integral-derivative (3DOFTID) is designed as a secondary regulator whose efficacy is showcased with that of other regulators. The significance of TDs on the system performance is revealed by performing the dynamical analysis on TADS with and without deliberating the TDs. Simulation results reveal the significance of TDs on the IPS performance and this work recommends considering the constraint of TDs for load frequency control (LFC) study. © 2023 IEEE.

关键词： Time delay

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Flexible power Generation Based on Model Predictive Control for PV systems 24

Flexible Power Generation Based on Model Predictive Control ...

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24th International Middle East power System Conference, MEPCON 2023

作者： Abdelrahem, Mohamed Ahmed, Mostafa Harbi, Ibrahim Kennel, Ralph Rodriguez, Jose Assiut University Department of Electrical Engineering Assiut Egypt Technical University of Munich High-Power Converter Systems Munich Germany Faculty of Engineering Universidad San Sebastian Santiago Chile

ISBN: (纸本)9798350358469

This paper proposes a flexible power generation scheme based on model predictive control (MPC). The proposed method combines maximum power point tracking (MPPT) operation with constant power generation (CPG), where the maximum power is extracted from the photovoltaic (PV) system. However, if the extracted power exceeds a certain threshold, the power generation will then be limited. A modified version of the perturb and observe (P&O) method is proposed to enhance the efficiency of the PV system. After that, the reference generated will be sent to the MPC loop, which decides the optimal switching state according to the cost function design. Different operating conditions confirm the superiority of the suggested technique, while comparison with the conventional method highlights the main benefits. © 2023 IEEE.

关键词： Model predictive control

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