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SSRN 2024年

作者： Zolkapli, Maizatul Hishamuddin, Azween Hadiera Zoolfakar, Ahmad Sabirin Azeman, Nur Hidayah Bakar, Mohd Hafiz Abu Abdullah, Fairuz Daniyal, Wan Mohd Ebtisyam Mustaqim Mohd Bakar, Ahmad Ashrif A. School of Electrical Engineering College of Engineering Universiti Teknologi MARA Selangor Shah Alam40450 Malaysia College of Engineering Universiti Teknologi MARA Selangor Shah Alam40450 Malaysia Institute of Microengineering and Nanoelectronics Universiti Kebangsaan Malaysia Selangor Bangi43600 Malaysia Institute of Power Engineering Universiti Tenaga Nasional Selangor Kajang43000 Malaysia School of Distance Education Universiti Sains Malaysia Pulau Pinang Minden11800 Malaysia Photonics Technology Laboratory Department of Electrical Electronic and Systems Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia Selangor Bangi43600 Malaysia

This study demonstrates a technique to enhance oxygen (O2) concentration measurement by combining surface plasmon resonance (SPR) and fluorescence-based sensor on polymer optical fiber (POF). The SPR was generated using silver (Ag) and the fluorescence was generated by organic dye. Three fluorescence dyes were used, Tris (4, 7-diphenyl-1, 10-phenanthroline) ruthenium (II) dichloride ([Ru(dpp)3]2+), platinum octaethylporphyrin (PtOEP) and 5,10,15,20-tetrakis (pentafluorophenyl) 21H,23H-porphine palladium (II) (PdTFPP). The sensor was tested in a gas chamber with different concentration level of O2. Sensitivity values for the fluorescence dyes for [Ru(dpp)3]2+, PtOEP, and PdTFPP were 0.0099 a.u/%, 0.0343 a.u/% and 0.05 a.u/% respectively. When SPR was implemented, the sensitivity values for Ag/[Ru(dpp)3]2+, Ag/PtOEP, and Ag/PdTFPP were 0.0589 nm/%, 0.0345 nm/%, and 0.118 nm/% respectively. PdTFPP and Ag/PdTFPP exhibit highest sensitivity in each experiment. Therefore, the further analysis for the sensing performance of PdTFPP and Ag/PdTFPP were held. As a result, Ag/PdTFPP exhibits lower limit of detection (LOD), and limit of quantification (LOQ) with 3.054% and 9.254%, respectively, with higher R2 of 0.9971 and lower mean standard deviation of 0.174, compared to PdTFPP 16.496% and 49.988% respectively, with R2 of 0.9211 and higher mean standard deviation of 2.003. This improvement can benefit researchers and professionals in medical diagnostics, environmental monitoring, and industrial process control by providing a more sensitive and accurate method for measuring O2 levels. © 2024, The Authors. All rights reserved.

关键词： Surface plasmon resonance

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On-Line Conference (ONCON), Industrial Electronics Society Annual

作者： Alexandru-Ionel Constantin Dorian Marin Paula Anghelita Ioan Tiberiu Serban Cristian Morari Gabriela Iosif Laboratory of Photovoltaic Systems National Institute for Research and Development in Electrical Engineering ICPE-CA University POLITEHNICA of Bucharest Romania Laboratory of Photovoltaic Systems National Institute for Research and Development in Electrical Engineering ICPE-CA Bucharest Romania Faculty of Power Engineering University POLITEHNICA of Bucharest National Institute for Research and Development in Electrical Engineering ICPE-CA Bucharest Romania Laboratory of Electromagnetic Compatibility National Institute for Research and Development in Electrical Engineering ICPE-CA Bucharest Romania Office of Management for Knowledge and Information National Institute for Research and Development in Electrical Engineering ICPE-CA Bucharest Romania

The paper presents a case study related to the maintenance and on-site detection of faulty photovoltaic (PV) panels in a 14 years old on-grid system with a peak power of 17.82 kW from the National Institute for Research and Development for Energy (INCDE ICEMENERG Bucharest) using a thermal camera, followed by the on-site measurement of the output power of a healthy and some PV panels with faults (hot spots and bypass activated diode) by Current-Voltage (I-V) and power-Voltage (P-V) curves using an HT I-V 400. Laboratory tests were performed at Standard Test Condition (STC) at the National Institute for Research and Development in electrical engineering ICPE-CA, Laboratory of Photovoltaic systems using a PASAN Highlight Solar Simulator for the same PV panels and also electroluminescence tests were performed in order to determine the cause of the faults. Based on the results some panels can be repaired or changed with new ones in order to increase the PV system efficiency.

关键词： Photovoltaic systems Industrial electronics power measurement Europe Energy measurement Production Maintenance engineering

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PrivBox: Privacy-Preserving Deep Packet Inspection with Dual Double-masking Obfuscated Rule Generation

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IEEE Transactions on Dependable and Secure Computing 2025年

作者： Wu, Pengfei Ning, Jianting Huang, Xinyi Chen, Rongmao Zhang, Kai Liang, Kaitai Wuhan University School of Cyber Science and Engineering Wuhan China Singapore Management University School of Computing and Information Systems Singapore City University of Macau Faculty of Data Science Macau China Fujian Normal University College of Computer and Cyber Security Fuzhou China Jinan University College of Cyber Security Guangzhou China National University of Defense Technology College of Computer Changsha China Shanghai University of Electric Power College of Computer Science and Technology Shanghai China Delft University of Technology Faculty of Electrical Engineering Mathematics and Computer Science Netherlands

Many network middleboxes have been deployed to perform deep packet inspection (DPI) over packet payloads. However, such middleboxes cannot accomplish their tasks when the traffic is encrypted. BlindBox (SIGCOMM 2015) provided the first solution for performing DPI over encrypted traffic. To improve its efficiency, a later proposal PrivDPI (CCS 2019) introduced a practical technique to generate encrypted rules. However, a recent proposal P2DPI (ASIACCS 2021) showed that the rule generator in PrivDPI can comprise the user's privacy. In this paper, we present a new attack on P2DPI and show that the privacy of its endpoints can still be compromised by the rule generator. We comprehensively analyze the vulnerability of prior studies and present PrivBox, a new DPI system that achieves the same privacy guarantee as BlindBox while maintaining practical efficiency. This is based on a new technique called dual double-masking obfuscated rule generation. For a ruleset of 3,000, PrivBox achieves connection establishment time on the endpoint side comparable to PrivDPI and supports up to 4,672 token encryptions per second, which is sufficient for a number of real-world applications. Overall, our experiment demonstrates that PrivBox is practical and well-suited for short, frequently established sessions, especially when token repeating is common. ©2004-2012 IEEE.

关键词： Differential privacy

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A Composite Nonlinear Controller Design to Enhance the Large-Signal Stability of a DC Distribution System with Constant power Loads

A Composite Nonlinear Controller Design to Enhance the Large...

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Smart Technologies for power, Energy and Control (STPEC), IEEE International Conference on

作者： S. K. Ghosh T. K. Roy M. A. H. Pramanik M. A. Mahmud Rajshahi University of Engineering & Technology Rajshahi Bangladesh Electrical Power & Control Systems Research Group Faculty of Engineering and Environment Northumbria University Newcastle UK

ISBN: (纸本)9781665443203

A composite backstepping integral sliding mode controller (BISMC) is proposed in this work for a DC-DC boost converter feeding a constant power load (CPL) in a simple DC distribution system. Here, the main objective is to ensure the large-signal stability with wide variations in operating regions. The proposed BISMC is designed based on the feedback linearized model of the DC-DC boost converter with a CPL where the average state-space model is exactly linearized. The use of exact feedback linearization overcomes the non-minimum phase problem of a DC-DC boost converter due to the presence of the CPL that exhibits negative impedance characteristics. The control law is obtained using the combination of backstepping and integral sliding mode control schemes where both approaches ensure the faster convergence of errors for all states and the integral action on the sliding surface is designed in such a fashion that will ensure the constant frequency operation of the power converter feeding the CPL while eliminating the variable frequency associated problem of the existing controllers. In addition, the stability of the whole system is analyzed through the Lyapunov stability theory. Numerical simulations are conducted to verify the performance of the designed composite nonlinear controller whose performance is also compared with a double-loop proportional integral (PI) controller to verify the superiority of the designed controller.

关键词： Surface impedance Backstepping Simulation Stability analysis Feedback linearization Voltage control Numerical stability

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A Backstepping Integral Sliding Mode Controller Design for Partial Feedback Linearized Models of Synchronous Generators in Simple power systems to Improve the Transient Stability

A Backstepping Integral Sliding Mode Controller Design for P...

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Smart Technologies for power, Energy and Control (STPEC), IEEE International Conference on

作者： M. A. H. Pramanik T. K. Roy M. S. Anower S. K. Ghosh M. A. Mahmud Rajshahi University of Engineering & Technology Rajshahi Bangladesh Electrical Power & Control Systems Research Group Faculty of Engineering and Environment Northumbria University Newcastle UK

ISBN: (纸本)9781665443203

This paper proposes a backstepping integral sliding mode controller (BISMC) based on the partial feedback linearization (PFBL) of the detailed model of synchronous generators (SGs) in simple power networks. The proposed scheme is designed to obtain the excitation control input using the detailed model of SGs in a simple power system where the PFBL is used to simplify the model. The BISMC is employed on this simplified model to ensure the transient stability during large disturbances. The inherent property of the BISMC tackles the chattering and overcomes the parameter sensitivity problem of the PFBL scheme. Simulation studies are conducted under different operating situations to justify the effectiveness of the proposed PFBL-BISMC over a partial feedback linearizing controller (PFBLC).

关键词： Damping Backstepping Sensitivity Simulation power system dynamics power system stability Synchronous generators

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A Low-complexity Encoderless Model Predictive Current Control using Luenberger Observer for Induction Machine Drives

A Low-complexity Encoderless Model Predictive Current Contro...

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International Conference on electrical Machines and systems (ICEMS)

作者： Haotian Xie Fengxiang Wang Yao Wei José Rodríguez Kunkun Zuo Ralph Kennel Chair of High-Power Converter Systems Technical University of Munich Munich Germany National local joint engineering research center of Electrical Drives and Power Electronics Quanzhou Institute of Equipment Manufacturing Haixi Institutes Chinese Academy of Science Jinjiang China Faculty of Engineering Universidad San Sebastian Santiago Chile

ISBN: (数字)9781665493024

ISBN: (纸本)9781665493031

This work would like proposes a low-complexity encoderless model predictive current control (MPCC) using Luenberger observer (LO) for induction machine (IM) drives. The proposed low-complexity MPCC optimizes the current error in the designed cost function without an exhaustive search. However, the information of angular speed is still collected by an encoder, which brings in an increased system maintenance and reduced reliability. Specifically, the flux information is estimated by the model of control plant, which is very sensitive to the variations of system parameters. To tackle the aforementioned issues, a Luenberger observer is proposed for estimating both the angular speed and model parameters in the MPCC methodology. The experimental implementation is conducted on a 2.2 kW IM testbench, which confirms a decent performance in a series of test scenarios.

关键词： Current control Computational modeling Search methods Rotors Observers Predictive models Maintenance engineering

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Decentralized Peer-to-Peer Energy Trading for Prosumers Considering Demand Response Program

Decentralized Peer-to-Peer Energy Trading for Prosumers Cons...

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Smart Grid Conference (SGC)

作者： Mohammad Seyfi Mehdi Mehdinejad Behnam Mohammad-Ivatloo Heidarali Shayanfar Center of Excellence for Power Systems Automation and Operation School of Electrical Engineering Iran University of Science and Technology Tehran Iran Faculty of Electrical and Computer Engineering University of Tabriz Tabriz Iran

ISBN: (纸本)9781665401661

In this paper, the peer-to-peer energy trading is performed between prosumers with energy surplus in the role of seller and prosumers with energy shortage in the role of buyer. In the proposed model, buyers, in addition to participating in local trading, can supply their demand shortage from the upstream market. These players can also participate in a price-based demand response program in a fully decentralized way to manage their energy and increase their welfare. The proposed problem is a fully decentralized problem that requires a decentralized approach to clear. In this paper, the decentralized alternating direction method of multipliers (ADMM) is used to solve the proposed problem. Numerical studies have been performed on a small distribution system with four sellers and three buyers. Numerical results show that the proposed model is a fully decentralized method, and the proposed approach ensures the convergence of negotiations and trading.

关键词： Demand response Convex functions Peer-to-peer computing Smart grids Numerical models Optimization Convergence

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Performance Investigation of Instantaneous Reactive power Control for 5 Level-Neutral Point Clamped Grid-Connected Photovoltaic Inverter

Performance Investigation of Instantaneous Reactive Power Co...

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electrical engineering and Automatic Control (ICEEAC), International Conference on

作者： Oumaymah Elamri Alla Eddine Toubal Maamar Charaf Chermite Moulay Rachid Douiri Mostefa Kermadi Saad Mekhilef LAMIGEP multidisciplinary research laboratory École Marocaine des Sciences de l'Ingénieur (EMSI) of Marrakech Marrakech Morocco Department of Electrical Systems Engineering Faculty of Technology University of M'hamed Bougara of Boumerdes Boumerdes Algeria Physics Department Control and Computer Science for Intelligent Systems and Green Energy Faculty of Science and Technology Cadi Ayyad University Marrakech Morocco School of Engineering University of Leicester Leicester United Kingdom Power Electronics and Renewable Energy Research Laboratory (PEARL) Kuala Lumpur Malaysia Swinburne University of Technology Hawthorn Vic Australia

ISBN: (数字)9798350349740

ISBN: (纸本)9798350349757

The utilization of solar energy in grid-connected photovoltaic installations has become increasingly significant. This article introduces a photovoltaic system seamlessly integrated with a three-phase network. The system employing a five-level Neutral Point Clamped (NPC) voltage source inverter is designed for a single-step connection to enhance power quality in the distribution network. The control technique employed for the efficient functioning of the photovoltaic system is based on the notion of instantaneous reactive power. Notably, this strategy is straightforward, operates the system throughout the day, and eliminates the need for Phase-Locked Loop (PLL) usage. The Pulse-Width Modulated (PWM) Current Controller sends switching signals to the NPC multilevel inverter, which does a great job of dynamic performance under steady-state and transient situations. The proportional-integral controller regulates the voltage of the Uninterruptible power Supply DC bus capacitors. The proposed system undergoes comprehensive simulation validation under various irradiation levels.

关键词： Photovoltaic systems Reactive power Voltage source inverters Switches Solar energy Steady-state Transient analysis

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Comparison of the Length of the Catenary Curve and its Parabolic Approximation in the Span of an Overhead Line 3

Comparison of the Length of the Catenary Curve and its Parab...

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3rd IEEE International Conference and Workshop in Obuda on electrical and power engineering, CANDO-EPE 2020

作者： Hatibovic, Alen Kadar, Peter Morva, Gyorgy Renewable Energy Utilization Optimum Solar Kft. Department of Electrical Engineering Baja Hungary Alternative Energy Technologies Óbuda University Electrical Engineering Department of Power Systems Budapest Hungary Institute of Power Engineering Kálmán Kandó Faculty of El. Engineering Budapest Hungary

ISBN: (纸本)9781728184906

Taking into consideration the fact that both the catenary and the parabola curves occur in plans of overhead lines, it is very important for electrical design engineers to clearly know what the mathematical differences are of the two mentioned curves, which are regularly in use for drawing the conductor curve. The parabola is generally applicable in short spans while the catenary can be used in any spans. This paper deals with the difference between the lengths of the catenary and its mathematical approximation with the parabola operating with universal formulas, which are valid for both inclined and level spans. Suitable algorithm of a parabolic approximation of the catenary is considered relevant from the aspect of overhead line design. It means that both the parabola and the catenary always have the same support points in a span. In order to draw concrete conclusions a complex practical example and their numerical results have been presented and adequately analysed. © 2020 IEEE.

关键词： Overhead lines

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Comparison of Synchronous Reluctance Machine and Permanent Magnet-Assisted Synchronous Reluctance Machine Performance Characteristics 27

Comparison of Synchronous Reluctance Machine and Permanent M...

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27th International Workshop on Electric Drives: MPEI Department of Electric Drives 90th Anniversary, IWED 2020

作者： Heidari, Hamidreza Andriushchenko, Ekaterina Rassolkin, Anton Kallaste, Ants Vaimann, Toomas Demidova, Galina L. Tallinn University of Technology Department of Electrical Power Engineering and Mechatronics Tallinn Estonia ITMO University Faculty of Control Systems and Robotics St. Petersburg Russia

ISBN: (纸本)9781728141589

Since the dominant induction machines and permanent magnet synchronous machines are well-established in the industry, the reluctance machines require more research work and investigation to substitute the conventional technologies. This paper analyzes the synchronous reluctance machines and permanent magnet-Assisted synchronous reluctance machines in terms of the effect of permanent magnets in the model and the performance characteristic of the machines. The machines are designed and the parameters are measured. The vector diagrams of the machines and the equivalent circuits of the machines are analyzed. A comparison of the machines in terms of power factor, efficiency, and torque of the machines is provided based on the measurements. The study presents a notable improvement in power factor and efficiency in the case of inserting permanent magnets in the synchronous reluctance machine's rotor. © 2020 IEEE.

关键词： Permanent magnets

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