Relevant bibliographies by topics / Phase comparison relay

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  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Phase comparison relay'

Author: Grafiati
Published: 30 May 2022
Last updated: 31 July 2025

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Journal articles on the topic "Phase comparison relay"

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Taher, Menna, Mohamed Abaza, Mostafa Fedawy, and Moustafa Aly. "Relay Selection Schemes for FSO Communications over Turbulent Channels." Applied Sciences 9, no. 7 (2019): 1281. http://dx.doi.org/10.3390/app9071281.

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Free Space Optics (FSO) Communication has attracted the attention of the researchers in the last decade due to its high data rate, security, and low cost. Relay-assisted techniques are used to divide the distance to shorter hops in order to mitigate the effects of turbulence, weather attenuation, pointing error, and geometric loss. Choosing an active relay per time slot has been proven to enhance the performance of the system and decrease the loading effect on the system when compared to all active relays. This paper investigates the best relay that can be selected according to the source to r
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Aftab, Muhmmad Waleed, Sajjad Hussain, Aftab Husain, Umar Ali Khan, and Hamza Kundi. "A Deep Reinforcement-Learning-Based Relay Selection for Underwater Sensors Network." Journal of Smart Internet of Things 1, no. 1 (2023): 5–13. http://dx.doi.org/10.2478/jsiot-2023-0001.

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Abstract Due to their limited frequency range and fast fading channels, underwater sensor networks (USNs) are vulnerable to collisions of packets. In this paper, we propose a deep reinforcement learning-based relay selection scheme with shortest latency (DRL-SL) for USNs that enables to choose the relay based on the state that comprised of the bit error rate (BER) of the previous transmission, and the jamming power measured by the relay node. The DRL-SL-based relay selection scheme completed in two phases. In the first phase, a deep neural network based learning is performed and second phase i
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Qiu, Xiao, Blanca De la Fuente, Alberto Lorenzo, and Santiago Veiga. "Comparison of Starts and Turns between Individual and Relay Swimming Races." International Journal of Environmental Research and Public Health 18, no. 9 (2021): 4740. http://dx.doi.org/10.3390/ijerph18094740.

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The present study investigated swimmers’ performances on the starting and turning segments between individual and relay races. A total number of 72 race performances of the same swimmers in both relay 4 × 100 m finals (freestyle, medley, and mixed freestyle) and individual 100 m finals or semi-finals (butterfly, breaststroke, and freestyle) from the LEN European Swimming Championships were compared with repeated measures MANOVA. Swimmers performed 5–7% faster starts in the relay than in the corresponding individual events, despite no differences in the flight phase and a lower performance (sho
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González-Cueto, José Antonio, Zaid García Sánchez, Gustavo Crespo Sánchez, Hernan Hernandez, Jorge Iván Silva Ortega, and Vicente Leonel Martínez Díaz. "A mho type phase comparator relay guideline using phase comparison technique for a power system." International Journal of Electrical and Computer Engineering (IJECE) 11, no. 2 (2021): 929. http://dx.doi.org/10.11591/ijece.v11i2.pp929-944.

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This paper presents a mho distance relay simulation based on the phase comparison technique using a typical electrical power systems analysis software for two cases: when the operation state is close to the static voltage limit and during a dynamic perturbation in the system. The paper evaluates the impedance variations caused by complex voltage values, the mho polarization, and the comparator operating region into the complex plane. In addition, the paper found the information for the dynamic perturbations from the outputs considering a mid-term stability program. The simulation of the mho-ph
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José, Antonio González-Cueto Cruz, García Sánchez Zaid, Crespo Sánchez Gustavo, Hernández Herrera Hernán, Iván Silva-Ortega Jorge, and Leonel Martínez Díaz Vicente. "A mho type phase comparator relay guideline using phase comparison technique for a power system." International Journal of Electrical and Computer Engineering (IJECE) 11, no. 2 (2021): 929–44. https://doi.org/10.11591/ijece.v11i2.pp929-944.

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This paper presents a mho distance relay simulation based on the phase comparison technique using a typical electrical power systems analysis software for two cases: when the operation state is close to the static voltage limit and during a dynamic perturbation in the system. The paper evaluates the impedance variations caused by complex voltage values, the mho polarization, and the comparator operating region into the complex plane. In addition, the paper found the information for the dynamic perturbations from the outputs considering a mid-term stability program. The simulation of the mho-ph
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Lopes, Pablo Rodrigues, and Rui Bertho Junior. "Development of a Low-Cost Relay Prototype for Real-Time Power Protection Functions." Learning and Nonlinear Models 21, no. 1 (2023): 90–109. http://dx.doi.org/10.21528/lnlm-vol21-no1-art7.

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This paper presents a Raspberry Pi 3B+ based low-cost universal relay able to run power protection functions in real-time. The configurations necessary for this single-board computer to be able to provide real-time response are shown, as for latency tests to verify its response time. An experimental circuit was built to send three-phase fault signals from a Relay tester to the low-cost relay, in order to evaluate its response time to clear faults in comparison to a commercial relay. A neural networks algorithm was developed and executed in real-time by the proposed low-cost relay, which is abl
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Zubić, Siniša J., and Milenko B. Djurić. "A distance relay algorithm based on the phase comparison principle." Electric Power Systems Research 92 (November 2012): 20–28. http://dx.doi.org/10.1016/j.epsr.2012.05.017.

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Zhu, Yifan, Tao Zheng, Minghao Wang, Hongcheng Zhao, and Xingguo Wang. "An Improved Directional Relay Adapted to a Distribution Network with IIG Integration." Energies 12, no. 17 (2019): 3345. http://dx.doi.org/10.3390/en12173345.

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The integration of distributed generation (DG) into a distribution network changes the network’s topology. Three-stage current protection for a radial distribution network cannot meet the requirements of relay protection for a distribution network with DG. A directional relay that is based on the positive sequence fault component (PSFC) can effectively identify faults in the positive and negative directions and can be used to solve the adaptability problem with three-stage current protection in a multi-source distribution network. However, DG and the traditional generators have different fault
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Mohammed, Ali Abdulwahhab, Li Yu, Manar Al-Kali, and Desheng Wang. "Analysis of Amplify-and-Forward Cooperative Networks with Nakagami-m fading Channels For MRC Diversity Combining." TELKOMNIKA Indonesian Journal of Electrical Engineering 16, no. 3 (2015): 546. http://dx.doi.org/10.11591/tijee.v16i3.1646.

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In this paper we study the effect of diversity combining for Nakagami -m fading Channels in the amplify-and-forward cooperative networks.We derive the cumulative density function (CDF), probability density function (PDF) and moment generating function (MGF) for the multiple relay amplify-and-forward network with single half duplex channel maximal ratio combiner (MRC). In this network we investigate the cases of MRC at the destination, as well derive the exact Symbol Error Rate (SER) of M-ary phase-shift keying (M-PSK), and quadrature amplitude modulation (M-QAM) in Nakagami -m fading environme
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Kolesnikov, Evgeniy, Aleksandr Novozhilov, Dilara Rakhimberdinova, Aleksandr Kislov, and Timofey Novozhilov. "Mathematical Model of a Nonlinear Power Transformer for Needs of Relay Protection." Energies 17, no. 7 (2024): 1710. http://dx.doi.org/10.3390/en17071710.

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In this work, a mathematical model of a three-phase nonlinear transformer is suggested. The model enables simulating the transformer operation with allowance for its nonlinearity and covers needs of the relay protection. Our model has been developed on the basis of a mathematical model with phase coordinates, where differential equations are composed by the Kirchhoff’s phase-voltage law. Based on this model, we first compose a mathematical model for simulating steady-state operation modes of a transformer, taking into account the asymmetry and nonlinearity of its ferromagnetic core. In this mo
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Dissertations / Theses on the topic "Phase comparison relay"

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Ніценко, Володимир Вікторович. "Підвищення показників ефективності функціонування релейного захисту збірних шин розподільчих установок". Thesis, Запорізький національний технічний університет, 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/34557.

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Дисертація на здобуття наукового ступеня кандидата технічних наук (доктора філософії) зі спеціальності 05.14.02 – Електричні станції, мережі і системи. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2018. Дисертація присвячена розв'язанню актуальної науково-прикладної задачі у галузі релейного захисту елементів електроенергетичних систем, що полягає у підвищенні ефективності дії релейного захисту збірних шин розподільчих установок. У роботі вдосконалено метод диференційно-фазного захисту шин, згідно з яким алгоритм порівняння фаз струмів застосовано у якос
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Ніценко, Володимир Вікторович. "Підвищення показників ефективності функціонування релейного захисту збірних шин розподільчих установок". Thesis, НТУ "ХПІ", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/34554.

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Дисертація на здобуття наукового ступеня кандидата технічних наук (доктора філософії) зі спеціальності 05.14.02 – Електричні станції, мережі і системи. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2018. Дисертація присвячена розв'язанню актуальної науково-прикладної задачі у галузі релейного захисту елементів електроенергетичних систем, що полягає у підвищенні ефективності дії релейного захисту збірних шин розподільчих установок. У роботі вдосконалено метод диференційно-фазного захисту шин, згідно з яким алгоритм порівняння фаз струмів застосовано у якост
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Huang, Ching-Lin, and 黃慶林. "Global Positioning System Application in Current Phase Comparison of Differential Protection Relay of Transmission and Distribution Line." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/3wz4vf.

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博士<br>國立臺北科技大學<br>電機工程系博士班<br>100<br>This dissertation applied synchronous time of global positioning system (GPS) to generate reference voltage for current phase comparison of differential protection relay of power transmission line. The proposed method does not require conventional temporary reference voltage configuration, and can make current phase comparison test faster and safer. This dissertation simulated short circuit current before power transmission system is integrated into system, so that the differential protection relays at both ends have current value, and current transducer tr
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Book chapters on the topic "Phase comparison relay"

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Pustovetov, Mikhail, and Konstantin Shukhmin. "Starting Mode Computer Simulation of Auxiliary Induction Motor Onboard of an AC Electrical Locomotive Equipped with a Capacitive Phase Splitter." In Induction Motor Computer Models in Three-Phase Stator Reference Frames: A Technical Handbook. BENTHAM SCIENCE PUBLISHERS, 2023. http://dx.doi.org/10.2174/9789815124309123010010.

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This chapter discusses the start-up simulation results of auxiliary drives of fan and piston-type air-compressor driven by three-phase induction motors. The computer model described in this chapter simulates a relay-contactor type system of auxiliary machines powered from the secondary winding of the traction transformer through the capacitive phase-splitter. The authors make an analytical comparison of the start-up process at different values of the grid voltages. Comparative assessments of the simulation-based and experimental oscillograms of voltages, currents and the rotational speed of th
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Sadrabadi, Mohammad T., Mauro S. Innocente, Evangelos Gkanas, and Ioannis Papagiannis. "Comparison of the effect of one-way and two-way fire-wind coupling on the modelling of wildland fire propagation dynamics." In Advances in Forest Fire Research 2022. Imprensa da Universidade de Coimbra, 2022. http://dx.doi.org/10.14195/978-989-26-2298-9_18.

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Operational wildland fire propagation models typically are uncoupled from the wind field or rely solely on estimations from an atmospheric model and/or meteorological observations. This leads to a frozen wind field with a high degree of uncertainty, and therefore to results drifting from the ground truth. On the other hand, a fully-coupled model is not viable for operational use due to the enormous computing effort required. This article proposes the use of real-time measurements from a drone swarm to enhance the results of a one-way coupled physics-based model (FireProM-F) to mimic the two-wa
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Mach, André, and Steven Eichenberger. "Interest Groups." In The Oxford Handbook of Swiss Politics. Oxford University Press, 2023. http://dx.doi.org/10.1093/oxfordhb/9780192871787.013.17.

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Abstract This chapter recounts the historical development of the Swiss system of interest intermediation. It discusses the central role of interest groups in the Swiss political system. After their creation at the end of the nineteenth century, the major economic interest groups (business interest associations and trade unions) could rely on the financial support of the federal state to fund their secretariat. They helped an incipient federal state extend its reach and thus forged themselves a key role in the Swiss political system, which was strengthened throughout the twentieth century. Even
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Conference papers on the topic "Phase comparison relay"

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Richardson, Ivan. "Wrought Copper-Nickel-Chromium- A New Concept for a Corrosion Resistant Copper Alloy." In CORROSION 2019. NACE International, 2019. https://doi.org/10.5006/c2019-13070.

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Abstract For many decades corrosion resistant copper alloys have been utilized in sea water applications for their unique combination of properties, anti-biofouling, non-sparking, resistance to cavitation corrosion, excellent wear properties and low magnetic permeability. One disadvantage has been lack of mechanical strength and copper-nickel-chromium (CuNi30Cr2) is a unique alloy developed to overcome this. It does not rely on a precipitation hardening mechanism for increasing the mechanical properties but “spinodal” decomposition which is a chemical strengthening mechanism. Additionally, the
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Dob, Brian, and Craig Palmer. "Communications assisted islanding detection: Contrasting direct transfer trip and phase comparison methods." In 2018 71st Annual Conference for Protective Relay Engineers (CPRE). IEEE, 2018. http://dx.doi.org/10.1109/cpre.2018.8349783.

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Utsumi, Takuya, Tomomichi Nakatsuka, Hideyuki Takani, Hidenari Amoh, Fumio Kawano, and Phil Beaumont. "Faulted phase selection function based upon impedance comparison in a distance protection relay." In 2011 IEEE International Conference on Advanced Power System Automation and Protection (APAP). IEEE, 2011. http://dx.doi.org/10.1109/apap.2011.6180365.

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Terzić, Aleksandar. "COMPARISON OF SINGLE PHASE SHORT CIRCUIT MODELLING BY USING OF ATPDRAW SOFTWARE AND IEC PROCEDURES." In 14. Savetovanje o elektrodistributivnim mrežama Srbije, sa regionalnim učešćem,. CIRED Liaison Committee of Serbia, 2024. http://dx.doi.org/10.46793/cired24.i-1.10at.

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Increasing trends of energy consumption and urban constraints in construction of new transmission/distribution substations are indications of bigger short circuit currents on busbars and overhead lines (OHL). OHLs are commonly equipped with Optical Power Ground Wire (OPGW), which has its limitations based on short circuit withstand heat impulse—heat energy that can be absorbed by OPGW and prevent damage to steel tubes with optical wires. This telecommunication characteristic of OHLs is becoming increasingly important, mainly for communication needs to be ensured to relay protection, for monito
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Giˆrda, Gelu F., and Abdemusa Moosajee. "Optimization of Diesel Engine: Synchronous Alternator Group." In ASME/IEEE 2004 Joint Rail Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/rtd2004-66026.

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The paper describes the findings of an experiment that is a result of close collaboration among four companies. The paper discusses the experiment on one locomotive by using a microprocessor-based relay, Multiple Function Relay (MFR) SEL-701, for on-line measurement, control and optimization of a HEP (Head End Power) group. The HEP has a Diesel engine, 810 HP/908 HP, 1800 rpm, and a double wound three-phase self excited synchronous alternator, 625 kVA, 575 V. The HEP group is installed on the locomotive and supplies the electrical hotel power to the train’s coaches. The relay SEL-701 (Schweitz
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Lewis, Keith L., John Simpson, and Jonathan R. Milward. "Comparison of Optical Coating Deposition Techniques Using Vapour Phase Precursors." In Optical Interference Coatings. Optica Publishing Group, 1995. http://dx.doi.org/10.1364/oic.1995.tud4.

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Significant interest continues to be shown in the improvement of the performance of optical coatings destined for high power laser applications. For laser applications, several factors play a role, in particular the effect of thin film microstructure. Many commercial processes rely on the use of electron beam sources. When used for refractory materials, such processes often result in coatings with a significant density of second phase inclusions. The problems arise as a result of non-uniform heating exacerbated by the poor thermal conductivity of the material present in the hearth, giving rise
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Yang, Lijing, Milad Rakhsha, and Dan Negrut. "Comparison of Surface Tension Models in Smoothed Particles Hydrodynamics Method." In ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-98124.

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Abstract We compare two surface tension models to solve two-phase fluid interaction problems in the context of the mesh-free Smoothed Particles Hydrodynamics (SPH) method. The Continuum Surface Force (CSF) model (later extended to Continuum Surface Stress, CSS), originally derived from grid-based numerical methods, requires an accurate estimation of the interface curvature to express the surface tension. Unlike CSF, the Inter-Particle Force (IPF) model is more robust in this regard as it draws on a molecular dynamics foundation by considering how the pairwise interaction forces between particl
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Kreitzer, Paul J., Michael Hanchak, and Larry Byrd. "Horizontal Two Phase Flow Regime Identification: Comparison of Pressure Signature, Electrical Capacitance Tomography (ECT) and High Speed Visualization." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-89075.

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Understanding the behavior of transient two phase refrigerant flow is an important aspect of implementing vapor compression systems in future aerospace applications. Pressure drop and heat transfer coefficient are important parameters that guide the design process, and are influenced by flow regime. Published two phase flow models rely heavily on a priori knowledge of the current two phase flow conditions including flow regime. Additional complications arise when applying published correlations to a range of systems because each correlation is based on a specific set of experimental conditions
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Gauntt, Randall O., Kyle Ross, and Kenneth Wagner. "MELCOR 1.8.5 Simulation of TMI-2 Phase 2 With an Enhanced 2-Dimensional In-Vessel Natural Circulation Model." In 10th International Conference on Nuclear Engineering. ASMEDC, 2002. http://dx.doi.org/10.1115/icone10-22321.

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Phase 2 of the TMI-2 accident (core uncovery and melting) is revisited with the latest release of MELCOR (i.e., Version 1.8.5). An enhanced multi-ring multi-level hydro nodalization of the reactor core and upper plenum was developed to permit calculation of natural convection heat transfer between the core and upper internals. Uncertainties in boundary and initial conditions are investigated with particular attention given to the distribution of liquid in the RCS at the beginning of Phase 2 and to the histories of pressure and level in the steam generators. Special attention given to modeling
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Janczewski, Jacek, Ulf Nilsson, Torsten Strand, and Christian Troger. "Heat Load on the Walls of an Annular DLE Combustor Calculation and Comparison With Experiments." In ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/98-gt-454.

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The knowledge of the hot gas side heat load is a necessary prerequisite for the design of the advanced cooling scheme of a dry low-NOx combustor and the mechanical integrity (MIT) calculations of the combustor walls. The magnitude and the spatial distribution of the heat fluxes has to be known in the very early phase of the design, where there is no hardware available. The evaluation of a combustor wall design has to be based on known process data, thermodynamic and combustion parameters and has to rely on computational methods and experience. A stepwise computational approach is presented to
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