Готові списки джерел за темами / Medium Voltage divider

Добірка наукової літератури з теми "Medium Voltage divider"

Автор: Grafiati

Опубліковано: 14 березня 2023

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Статті в журналах з теми "Medium Voltage divider"

Crotti, Gabriella, Daniele Gallo, Domenico Giordano, Carmine Landi, and Mario Luiso. "Medium Voltage Divider Coupled With an Analog Optical Transmission System." IEEE Transactions on Instrumentation and Measurement 63, no. 10 (October 2014): 2349–57. http://dx.doi.org/10.1109/tim.2014.2317294.

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Orlov, Aleksandr I., Sergei V. Volkov, Ilsur Kh Garipov, and Sergey G. Nikiforov. "ANALYSIS OF POSSIBILITY OF LOW POWER TAKE-OFF FROM MEDIUM VOLTAGE OVERHEAD TRANSMISSION LINES." Vestnik Chuvashskogo universiteta, no. 1 (March 30, 2022): 100–106. http://dx.doi.org/10.47026/1810-1909-2022-1-100-106.

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The paper considers the possibility of using capacitive power take-off from medium voltage overhead power lines with isolated neutral. Direct scaling of the designs of the known 1-phase capacitive power take-off devices intended for high voltage overhead power lines is impractical for several reasons: the impossibility of obtaining significant power, violation of the operating conditions of protection against single-phase earth faults, the creation of asymmetry of phase voltages relative to the ground. As a power take-off device, it is proposed to use a 3-phase symmetrical circuit of a capacitive voltage divider with a voltage converter at the output, which makes it possible to minimize the indicated disadvantages. On the basis of computer simulation of the equivalent circuit of an overhead line section with a power take-off device, its external characteristics were obtained for various values of the capacitance of the voltage divider capacitors. The simulation results confirm the technical feasibility and feasibility of using the proposed power take-off method for feeding low-power 1- and 3-phase consumers.

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De Maria, Letizia, Daniele Bartalesi, and Natale Claudio Pistoni. "Combined Optical Sensor and Capacitor Voltage Divider Arrangement for Voltage Control in Medium Voltage Switchboard Fiber." Procedia Engineering 168 (2016): 1597–600. http://dx.doi.org/10.1016/j.proeng.2016.11.469.

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Zhou, Kai, Qing Xiong, Min He, Lingjiang Dong, and Yalin Chen. "An On-line Monitoring System for Over-voltages Based on a Two-stage Voltage Divider and Field Measurement Results in Medium-voltage Grids." Electric Power Components and Systems 44, no. 12 (June 9, 2016): 1345–56. http://dx.doi.org/10.1080/15325008.2015.1028117.

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Crotti, Gabriella, and Domenico Giordano. "Set up and characterization of a measuring system for PQ measurements in a MV site with PV generation." ACTA IMEKO 4, no. 1 (February 5, 2015): 97. http://dx.doi.org/10.21014/acta_imeko.v4i1.171.

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Анотація:

The features of a Power Quality measurement system which includes both voltage and current transducers and a self-developed measuring instrument are described. The system is intended for measurements in substations at medium voltage level. A Rogowski coil and a voltage divider are the used transducers, whereas the measuring instrument is based on a Reconfigurable I/O-FPGA system with embedded software. Attention is focused on the procedures adopted for the characterization of the voltage and current sensors, which are carried out taking into account the expected on-site measurement conditions. An example of use of the systems for measurement of some PQ parameters in a private substation which connects an industrial load and two photo-voltaic generation plants to the public MV voltage network is presented, together with the associated voltage and current uncertainty budget. By making use of the results obtained in the characterization phase, the current and voltage measurement uncertainty can be reduced.

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Xie, Yue, and Jing Chen. "Research on the Calibration Instrument for the Medium-Voltage Electronic Instrument Transformers." Advanced Materials Research 433-440 (January 2012): 7471–78. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.7471.

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Electronic instrument transformers are used in power line for electrical measurement and protection purposes. Calibration instruments are necessary for the transformation error test of electronic instrument transformers. The operation principles of the direct and difference measurement method based calibration instrument for the medium-voltage electronic instrument transformers are systematically analyzed in this paper. The analysis results show that the direct measurement method based instrument can be used for the calibration of electronic instrument transformers with air-core coils or resistor-capacitor voltage divider without a built-in integrator, and the difference measurement method based instrument is suitable for the calibration of the electronic instrument transformers with no rated phase offset.

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Hu, Bo Xue, He Li, Zhuo Wei, Ya Feng Wang, Diang Xing, Ri Sha Na, and Jin Wang. "An Auxiliary Power Supply for Gate Drive of Medium Voltage SiC Devices in High Voltage Applications." Materials Science Forum 924 (June 2018): 836–40. http://dx.doi.org/10.4028/www.scientific.net/msf.924.836.

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A high-reliability auxiliary power supply (APS) for gate drive circuits is crucial to utilization of emerging medium voltage (MV ≥ 10 kV) Silicon Carbide (SiC) devices in high voltage applications. This paper proposes an active voltage divider based APS with lower arm voltage regulation. The proposed APS circuit is targeting the application of MV SiC devices in modular multilevel converters (MMCs). It can harvest energy from a MV (≥ 7 kV) dc bus to provide an isolated low voltage output to gate drive circuits of MV SiC devices. Compared to existing APS solutions, it can achieve a high input voltage (≥ 7 kV) with simple circuit structure and control scheme. In this paper, the working principle of the proposed APS is presented and a circuit design example is shown. A circuit prototype with 7 kV input and 15 V/10 W output has been built and tested to verify the effectiveness of the proposed solution.

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Fusiek, Grzegorz, and Pawel Niewczas. "Construction and Evaluation of an Optical Medium Voltage Transducer Module Aimed at a 132 kV Optical Voltage Sensor for WAMPAC Systems." Sensors 22, no. 14 (July 15, 2022): 5307. http://dx.doi.org/10.3390/s22145307.

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This paper reports on the construction and characterization of an optical voltage transducer module for applications in the field of wide-area monitoring, protection, and control (WAMPAC). The optical medium voltage transducer (MVT) module was designed to be combined with a capacitive voltage divider (CVD) to form a voltage sensor intended for 132 kV high voltage (HV) networks. The MVT module comprises a combination of a piezoelectric transducer (PZT) and a fiber Bragg grating (FBG) as a core optical sensing element. Changes in the input voltage across the PZT translate into strain being detected by the FBG. The resultant FBG peak wavelength can be calibrated in terms of the input voltage to obtain a precise voltage measurement. The module was experimentally evaluated in the laboratory, and its performance was assessed based on the requirements specified by the IEC standards for electronic voltage transformers and low power voltage transformers. The results of accuracy tests demonstrate that the MVT module is free from hysteresis, within the experimental error, and is capable of simultaneously meeting the requirements for 0.1 metering and 1P protection classes specified by the IEC 60044-7 and IEC 61869-11 standards.

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Kaštelan, Nediljko, Marko Zubčić, Maja Krčum, and Miro Petković. "Contribution To The Reduction Of The Ship’s Switchboard By Applying Sensor Technology." Pedagogika-Pedagogy 93, no. 6s (August 31, 2021): 235–49. http://dx.doi.org/10.53656/ped21-6s.21con.

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The paper discusses the contribution to energy efficiency by reducing the dimensions of the main switchboard (medium voltage or High Voltage – used on ship). Reducing the dimensions of the switchboards can be achieved by reducing the dimensions of the bus bars, while fully satisfying the conditions with regard to thermal and mechanical stresses. The same can be achieved by modifying some other components, such as the application of new technology for measuring current and voltage, using current and voltage sensors that fall into the category of completely new technological solutions. By replacing conventional measuring transformers (IT), compact and efficient sensor technology significantly contributes to reducing the dimensions and mass of switchboards, which ultimately contributes to energy efficiency. Previous applications, the possibility of improving existing solutions, especially in applications in marine power systems, and new technological solutions that contribute to the efficiency of the marine power system using the Rogowski coil sensor and voltage divider voltage sensors are also considered.

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Delatte, Pierre, Etienne Vanzieleghem, Thomas François, and Jean-Christophe Doucet. "VEGA & RIGEL: New tiny high temperature adjustable voltage regulators for reduced PCB footprint and extended reliability of medium and high temperature systems." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2012, HITEC (January 1, 2012): 000093–98. http://dx.doi.org/10.4071/hitec-2012-tp15.

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This paper presents two new tiny high-temperature adjustable voltage regulators. CHT-VEGA can regulate a 5V ±10% input voltage to an output within the range 1.1V to 3.6V and delivering up to 500mA at 225°C (junction). The output voltage is set by an external resistor divider and is maintained within +/−5% total accuracy in all load, line and temperature conditions. The second device, CHT-RIGEL, supports a wide input voltage range up to 30V; its output is adjustable between 1.8V and 24V, with up to 100mA capability at 225°C. Both chips feature a thermal shut-down with a threshold in the 250∼300°C range: the first over-temperature protection of this kind in high temperature devices. CISSOID created a new TDFP SMD package that combines tiny size and good thermal resistance. A detailed thermal characterization is presented, as well as what it means for the operating temperature, and the impact on PCB footprint and system cost. As a conclusion, will be highlighted the benefits of using such ICs rated 225°C at junction level, even if the ambient temperature of the application remains low (e.g. 175°C), and in particular the impact on reduction of the PCB footprint, compared to 175–210°C ratings.

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Більше джерел

Дисертації з теми "Medium Voltage divider"

Štefanka, Martin. "Aplikace senzorů a digitalizace podle IEC 61850 v sítích a rozvodnách vysokého napětí." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-240510.

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Vzduchem izolované vysokonapěťové rozváděče jsou nedílnou součástí energetického distribučního řetězce a to jak v průmyslovém, tak ve veřejném sektoru. Hlavní funkcí rozváděče je ochrana pracovního personálu, rozpojování/odpojování a spínání, izolování, měření proudů a napětí, chránění a ovládání zatížení a komunikace dat do řídících systémů. V každé z výše zmíněných funkcí probíhal technologický vývoj v průběhu posledních 40 let. Dnešní rozváděče jsou spolehlivé a elektrickému oblouku odolné zařízení, zoptimalizované téměř k fyzikálním limitům dielektrických, elektromagnetických a termodynamických polí. Vakuové vypínače zajišťují stálou a spolehlivou vypínací funkci. Taktéž v oblasti chránění, řízení a komunikace došlo k mnoha technologickým proměnám. Od elektromechanických relé přes zařízení založená na tranzistorech, později na jednoúčelových mikroprocesorech, až po dnešní multifunkční vysoce výkonná mikroprocesorová inteligentní elektronická zařízení. Pouze oblast měření proudů a napětí setrvala z technologického hlediska posledních 40 let beze změny. K dominujícím měřícím technologiím dneška stále ještě patří indukčně založené transformátory proudu a napětí. Byly sice provedeny některé pokusy k obměně technologie měření jako takové, nicméně bez dosažení úspěchu. Tato dizertační práce je zaměřena na poskytnutí nového náhledu na alternativní technologii měření v elektrických sítích a ve vzduchem izolovaných vysokonapěťových rozváděčích, kterou lze využít jak pro měření proudu, tak i napětí. Tato práce vysvětluje, proč Rogowského cívky, odporové a kapacitní děliče jsou tou správnou volbou a měly by být použity ve vysokonapěťových rozváděčích a podrobně analyzuje přesnost měření a jejich příslušné meze. Dále tato práce popisuje, že pro nasazování nových měřících technologií musí být postupováno systematicky. Senzory připojené k inteligentním elektronickým přístrojům a schopností komunikace založené na IEC 61850 spolu s vysokorychlostní komunikační sběrnicí Ethernetu vytvoří systém, který zjednoduší a sjednotí konstrukci rozváděčů a umožní oddělit aspekty projektování měření od studie zkratových selektivit. V práci je také uveden příklad, jak tento nový systém může přinést změny a zjednodušení do oblastí projektování a řízení. V této práci jsou popsány výsledky několikaletého úsilí při stanovení nových měřících a digitalizovaných přístupů ve vysokonapěťových rozváděčích pod autorovým vedením. Toto úsilí také vedlo k uvedení nového produktu – UniGear Digital - konceptu od ABB. Závěrečná část práce demonstruje praktické nasazení všech výsledků v této práci při skutečných aplikacích.

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Частини книг з теми "Medium Voltage divider"

Ramezani, Saeed, Mehdi Pirpiran, and Mohamad Reza Behmaneshfar. "The Role of Root Cause Analysis (RCA) in Power Distribution Network Interruption Reduction." In Cases on Optimizing the Asset Management Process, 241–65. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-7943-5.ch010.

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Responsibility and reliability are very important for electricity subscribers. Due to their extent, these networks face a variety of challenges, and most of them are recurring but can be prevented if the root causes are identified. One of the methods to identify the root of network problems is to use the RCA method in the analysis of blackouts. RCA is an approach that systematically investigates adverse events and, by gathering evidence and documentation, finds its root causes and offers solutions to address them. Finally, it monitors the implementation of solutions and evaluates their effectiveness. In this chapter, while introducing some of the challenges of medium voltage power supply networks, the root of the problems are extracted, and corrective solutions are presented in three sample problematic feeders. After extracting the solutions, they are divided into two categories: the first category is the solutions specific to the sample feeder, and the second category is the solutions that can be generalized to other parts of the power supply network.

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Brock, Fred V., and Scott J. Richardson. "Static Performance Characteristics." In Meteorological Measurement Systems. Oxford University Press, 2001. http://dx.doi.org/10.1093/oso/9780195134513.003.0005.

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Sensor performance characteristics are generally divided into at least two categories: static and dynamic. Additional categories sometimes used include drift and exposure errors. The performance of sensors in conditions where the measurand is constant or very slowly changing can be characterized by static parameters. Dynamic performance modeling requires the use of differential equations to account for the relation between sensor input and output when the input is rapidly varying. Static characteristics due to friction or other nonlinear effects would vastly complicate the differential equations so, even when the input is not steady, static and dynamic characteristics are considered separately. Static characteristics are determined by carefully excluding dynamic effects. Dynamic characteristics are assessed by assuming that all static effects have been excluded or compensated. Many of these terms have been encountered in chaps. 1 and 2, although without formal definitions. Analog signal. A signal whose information content is continuously proportional to the measurand. If an electrical temperature sensor has a voltage output, that voltage signal fluctuates with the sensor temperature. Voltage output would be continuously proportional to the measurand (temperature) and is analogous to it, hence we refer to the sensor output as an analog signal. Data display. Any mechanism for displaying data to the user. The stem of a mercury-in-glass thermometer with attached scale is a data display. Data storage. A memory element or mechanism for holding data and later recovering them such as a disk or magnetic tape. Again, this could be as simple as a piece of paper. Data transmission. The process of sending a signal from one place to another. The data transmission medium could be a piece of paper, a magnetic tape, radio or light waves, or telephone wires. Digital signal. A signal whose information content varies in discrete steps. The step size can be made arbitrarily small such that a plot of a digitized signal could also resemble the analog signal. However, the granularity of a digital signal will be revealed if it is examined in sufficient detail.

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Тези доповідей конференцій з теми "Medium Voltage divider"

Crotti, G., D. Giordano, and A. Sardi. "Development of a RC medium voltage divider for on-site use." In 2010 Conference on Precision Electromagnetic Measurements (CPEM 2010). IEEE, 2010. http://dx.doi.org/10.1109/cpem.2010.5544525.

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Crotti, Gabriella, Domenico Giordano, and Angelo Sardi. "Development and use of a medium voltage RC divider for on-site calibration." In 2011 IEEE 2nd International Workshop on Applied Measurements for Power Systems (AMPS). IEEE, 2011. http://dx.doi.org/10.1109/amps.2011.6090347.

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Hu, Boxue, Zhuo Wei, He Li, Diang Xing, Risha Na, John A. Brothers, and Jin Wang. "A gate drive with active voltage divider based auxiliary power supply for medium voltage SiC device in high voltage applications." In 2018 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2018. http://dx.doi.org/10.1109/apec.2018.8341443.

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Soares Farias Neto, João, Lucas Vinicius Hartmann, Camila Seibel Gehrke, and Fabiano Salvadori. "Design, Development and Analysis of a Voltage Sensor Based on Capacitive Voltage Divider for Smart Grid Applications." In Congresso Brasileiro de Automática - 2020. sbabra, 2020. http://dx.doi.org/10.48011/asba.v2i1.1109.

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Анотація:

With the recent push for renewable energy several former consumers units now have energy generation capabilities. While this approach is beneficial in general, it also poses new challenges for cooperation and grid stability. The new smartgrid now needs bidirectional power flow, data communication, and intelligent controls in order to ensure reliable operation. Voltage sensing plays a key role, capacitive voltage transformers have been demonstrated useful for high- voltage (100kV+), but have not yet been discussed for low (220V) and medium (13kV) voltage. This paper proposes a simplified capacitive voltage divider circuit for low-voltage measurement. Mathematical modelling is used for steady-state operation, circuit design, and sensitivity to analysis. Monte-Carlo simulations are employed to verify the effect of component tolerances, indicating under 0.7dB gain, and 0.03° error at fundamental frequency. Experimental validation is performed at low-voltage levels (127V), indicating 0.5 dB magnitude and 0.3° phase deviation at fundamental frequency. Performance is also validated from 60Hz to the 50th harmonic, showing 20° phase deviation at the higher order harmonics (16th and up). From the obtained results it is expected that the sensor is sufficient for voltage quality measurements, but should be software-corrected if power measurement is required at the high-order harmonics.

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Talaska, Tomasz, and Rafal Dlugosz. "Parallel, Asynchronous, Current-Mode Median Filter Based on Resistive Voltage Divider." In 2018 International Conference on Signals and Electronic Systems (ICSES). IEEE, 2018. http://dx.doi.org/10.1109/icses.2018.8507284.

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Park, Gu-Gon, Young-Jun Sohn, Sung-Dae Yim, Tae-Hyun Yang, Young-Gi Yoon, Won-Yong Lee, and Chang-Soo Kim. "Influence of Water Behavior in the Gas Diffusion Layer on the Performance of PEMFC." In ASME 2004 2nd International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2004. http://dx.doi.org/10.1115/fuelcell2004-2443.

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The affect of water behavior on the performance of the polymer electrolyte membrane fuel cell (PEMFC) was investigated experimentally. To understand the water transportation phenomena systematically, the gas diffusion layers were divided into two parts: the gas diffusion medium (GDM) and the micro-layer (ML). In this work, different Teflon (PTFE) contents in the GDM were intensively investigated under various single cell operation conditions. Current-Voltage (I-V) performance curves of single cells were compared and analyzed with respect to water transportation in the GDM. Through the results of this work, the dominant driving forces of the water transportation in the gas diffusion layer were determined which aids in designing the gas diffusion layers.

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Rudko, Georgii, Mariia Kyrilo, and Maksym Ozerko. "MULTICOMPONENT DEPOSITS WITH BY-PRODUCT AS THE MAIN SOURCE OF FELDSPAR RAW MATERIALS FOR MODERN TECHNOLOGIES." In GEOLINKS Conference Proceedings. Saima Consult Ltd, 2021. http://dx.doi.org/10.32008/geolinks2021/b1/v3/32.

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"Feldspar is raw materials with a growing volume of production every year, as well as a price for it. Feldspar consumption has been gradually increasing in ceramics, glass industry for solar panels, housing, and building construction. Feldspar raw materials include intrusive, effusive rocks, weathering crust of crystalline rocks, sedimentary altered and altered rocks, as well as partially medium and basic aluminosilicate rocks. It was defined an industrial application for each species of feldspar. Potassium feldspars (orthoclase, microcline, sanidine) are used in electroceramic, electrode, abrasive, and ceramics industries. For these productions, the potash module is fixed in a ratio of 2: 1. For some industries, in particular the manufacture of high-voltage ceramics, the necessary feldspars are as close as possible to pure potassium (with a modulus of at least 4: 1, which corresponds to 80% of the orthoclase component). Potassium-sodium raw materials, from a potassium modulus of at least 0.9, are used for building construction. Sodium minerals with non-standardized potassium modulus are used for the glass industry, the production of enamels, and products such as vitreous porcelain. Calcium feldspars, represented by plagioclase of higher numbers, have limited practical application and their presence in feldspar concentrates is undesirable. According to mineral associations, all types of feldspar raw materials can be divided into five types: 1) feldspar (syenites, trachitis); 2) quartz-feldspar (pegmatites, granites, sands, etc.); 3) nepheline-feldspar (nepheline syenites, alkaline pegmatites); 4) quartz-sericite-feldspar (shales, secondary quartzites); 5) quartz-kaolinite-feldspar (sands, alkaline kaolins, secondary quartzites). It is shown on the example of Ukrainian deposits of feldspar minerals that complex deposits with by-products become the main source for production. Especially if these are new mining operation facilities. The authors have identified three main types of such complex multicomponent deposits: 1) deposits of intrusive rocks where weathering crust of crystalline rocks are mined as a byproduct; 2) complex deposits, where feldspar rocks are enclosing or overburden and can also be considered as byproducts; 3) deposits where feldspar concentrate can be produced as a product of ore components processing."

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