Thematische Bibliographien / Analysis of medium voltage distribution grid

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Auswahl der wissenschaftlichen Literatur zum Thema „Analysis of medium voltage distribution grid“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 1. Februar 2022

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Zeitschriftenartikel zum Thema "Analysis of medium voltage distribution grid"

Vilela Junior, Wagner A., Antonio P. Coimbra, Gabriel A. Wainer, et al. "Analysis and Adequacy Methodology for Voltage Violations in Distribution Power Grid." Energies 14, no. 14 (2021): 4373. http://dx.doi.org/10.3390/en14144373.

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This paper proposes a computational process development capable of filling the electric power sector shortage regarding voltage non-conformities identification in electric distribution power grid accounting for loads dynamic behavior at medium and low voltages. Actual distribution power grid data are used, with georeferencing to signal voltage transgressions locations, generate a report with voltage transgression indices and financial reimbursement values provided by legislation. The methodology compares regulatory requirements and makes available in software some possible actions in an attempt to adjust voltage levels, avoiding inconvenience and penalties for energy utilities providers. The method involves a data extractor construction for electricity provider company’s databases, computer simulations and comparison of obtained results with values established in electricity quality control standards. Thus, finding non-conformity locations and determining network adjustments to correct tension indexes in permanent regulation. The proposal features a reduction in electricity utilities operating costs, increasing efficiency in operation and energy quality available to consumers.

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Ma, Xing He, Bing Yao Yan, and Yong Sheng Wang. "Medium Voltage Distribution Network Voltage Grade Sequence Comprehensive Evaluation Based on Gray/Ahp." Applied Mechanics and Materials 273 (January 2013): 332–37. http://dx.doi.org/10.4028/www.scientific.net/amm.273.332.

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Analyze our country medium voltage distribution network voltage grade sequence current situation, consider technological factors, economic factors and equipment factors, establish voltage grade sequence analysis model, through the grey /ahp, evaluation analysis model. Finally, Given the typical regional network model, the grey/ahp analyses. Example showes, the method is helpful for regional power grid voltage grade the qualitative and quantitative evaluation.

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Save, Nishant, Marjan Popov, Arjen Jongepier, and Gert Rietveld. "PMU-based power system analysis of a medium-voltage distribution grid." CIRED - Open Access Proceedings Journal 2017, no. 1 (2017): 1927–30. http://dx.doi.org/10.1049/oap-cired.2017.1035.

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Diamenu, Godwin. "Statistical Analysis of Electric Power Distribution Grid Outages." European Journal of Engineering and Technology Research 6, no. 3 (2021): 27–33. http://dx.doi.org/10.24018/ejers.2021.6.3.2406.

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Power systems in general supply consumers with electrical energy as economically and reliably as possible. Reliable electric power systems serve customer loads without interruptions in supply voltage. Electric power generation facilities must produce enough power to meet customer demand. Electrical energy produced and delivered to customers through generation, transmission and distribution systems, constitutes one of the largest consumers markets the world over. The benefits of electric power systems are integrated into the much faster modern life in such extent that it is impossible to imagine the society without the electrical energy. The rapid growth of electric power distribution grids over the past few decades has resulted in a large increment in the number of grid lines in operation and their total length. These grid lines are exposed to faults as a result of lightning, short circuits, faulty equipment, mis-operation, human errors, overload, and aging among others. A fault implies any abnormal condition which causes a reduction in the basic insulation strength between phase conductors or phase conductors and earth, or any earthed screens surrounding the conductors. In this paper, different types of faults that affected the electric power distribution grid of selected operational districts of Electricity Company of Ghana (ECG) in the Western region of Ghana was analyzed and the results presented. Outages due to bad weather and load shedding contributed significantly to the unplanned outages that occurred in the medium voltage (MV) distribution grid. Blown fuse and loose contact faults were the major contributor to unplanned outages in the low voltage (LV) electric power distribution grid.

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Jia, Yu Wei, Wang Ding, and Jia Dong Huang. "Medium Voltage Distribution Network Planning of City Based on Reliability." Advanced Materials Research 655-657 (January 2013): 2401–4. http://dx.doi.org/10.4028/www.scientific.net/amr.655-657.2401.

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Power network planning is an important foundation of the development of the grid, its planning level and quality directly affects the security, reliability, and economic level of the power grid. This article will carry on the analysis according to the reliable condition to the city distribution network, mainly includes the structure of the urban network wiring, the form of the host wiring and medium voltage distribution network wiring and so on.

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Schultis, Daniel-Leon, and Albana Ilo. "Increasing the Utilization of Existing Infrastructures by Using the Newly Introduced Boundary Voltage Limits." Energies 14, no. 16 (2021): 5106. http://dx.doi.org/10.3390/en14165106.

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The increasing share of distributed generation aggravates voltage limit compliance at customers’ delivery points. Currently, grid operators validate compliance with the voltage limits specified in Grid Codes by conducting load flow simulations at the medium voltage level, considering the connected low voltage grids as ‘loads’ to reduce the modeling effort. This approach does not support the accurate validation of limit compliance, as the voltage drops at the low voltage level are unknown. Nevertheless, to guarantee acceptable voltages even under worst-case conditions, safety margins are involved that impair the utilization of the electricity infrastructure. This study conducts load flows simulations in a test distribution grid, revealing the variable character of the voltage limits at different system boundaries. The conventional load model is extended by new parameters—the boundary voltage limits—to enable the consideration of variable voltage limits in load flow analysis of LINK-based smart grids. The standardized structure of the LINK-architecture allows for the systematic and accurate validation of voltage limit compliance by reducing the required modeling data to the technically necessary minimum. Use cases are specified that allows smart grids to increase the utilization of the electricity infrastructure by day-ahead scheduling and short-term adaptation of boundary voltage limits.

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Montoya, Oscar Danilo, Walter Gil-González, Andrés Arias-Londoño, Arul Rajagopalan, and Jesus C. Hernández. "Voltage Stability Analysis in Medium-Voltage Distribution Networks Using a Second-Order Cone Approximation." Energies 13, no. 21 (2020): 5717. http://dx.doi.org/10.3390/en13215717.

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This paper addresses the voltage stability margin calculation in medium-voltage distribution networks in the context of exact mathematical modeling. This margin calculation is performed with a second-order cone (SOCP) reformulation of the classical nonlinear non-convex optimal power flow problems. The main idea around the SOCP approximation is to guarantee the global optimal solution via convex optimization, considering as the objective function the λ-coefficient associated with the maximum possible increment of the load consumption at all the nodes. Different simulation cases are considered in one test feeder, described as follows: (i) the distribution network without penetration of distributed generation; (ii) the distribution network with penetration of distributed generation; and (iii) the distribution grid with capacitive compensation. Numerical results in the test system demonstrated the effectiveness of the proposed SOCP approximation to determine the λ-coefficient. In addition, the proposed approximation is compared with nonlinear tools available in the literature. All the simulations are carried out in the MATLAB software with the CVX package and the Gurobi solver.

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Zhang, Meng, Feng Zhan Zhao, Xiao Li Meng, et al. "Establishment of Smart Distribution Grid Evaluation System." Applied Mechanics and Materials 719-720 (January 2015): 443–47. http://dx.doi.org/10.4028/www.scientific.net/amm.719-720.443.

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This paper analyzes the core values of the smart grid that is the need of significant stakeholders, the reliable and efficient electricity supply for users and running economy for power grid enterprises. Using fishbone analysis gets the main elements, which are the quality and reliability of power supply, grid structure, equipments situation, intelligence level and operation level. Due to the complexity of the evaluation system,the entire system divided into three layer levels,the target layer, the element layer and the index layer. The structure and operation of low voltage distribution grid and medium-high voltage distribution are significantly different,they separate into two systems to evaluate,it can get the evaluation index system. Compared with the traditional distribution grid evaluation system, this system is more comprehensive and systematic for evaluation the development level of the smart distribution grid,it is practically valuable for evaluation work.

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D.Srinivasa Rao & Dr. Anupama A. Deshpande. "DAB Based DC-DC High Frequency Link PET for Interconnecting MVDC-LVDC Grids." International Journal for Modern Trends in Science and Technology 7, no. 05 (2021): 165–71. http://dx.doi.org/10.46501/ijmtst0705028.

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This paper proposes dual active bridge (DAB) based high frequency power electronic transformer (PET) for interconnecting medium voltage dc (MVDC) and low voltage dc (LVDC) grids for dc power distribution. The above proposed concept works on dual active phase shift principle and square wave HF modulation technique for bidirectional power transfer. Compared to the traditional dc transformer scheme, The proposed power electronic transformer (PET) can disconnect from LVDC distribution grid effectively as a dc breaker when a short circuit fault occurs in the distribution grid. The isolated DC-DC PET topology with a wide range of voltage conversion ratio is useful for High Voltage DC tapping. The DAB based on switched capacitor is connected to the medium voltage DC side and acts as an inverter. The proposed topology has the ability to transfer higher power, and lower circulating power, lower high frequency link voltage, and RMS current and peak values with the same transmission power in the MVDC side. This paper analyzes the topology, voltage and power characterization, control strategy in detail. Increase in the intermediate AC frequency will reduce the size of the transformer and other passive elements significantly in the circuit. The theoretical analysis is supported by MATLAB simulation.

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Camargo, Luis Ramirez, Jane Wuth, Markus Biberacher, and Wolfgang Dorner. "A spatially explicit assessment of middle and low voltage grid requirements in Bavaria until 2050." GeoScape 13, no. 2 (2019): 88–97. http://dx.doi.org/10.2478/geosc-2019-0008.

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Abstract The energy transition towards high shares of renewables and the continued urbanization process have a direct and strong impact on the shape and characteristics of the electricity transmission and distribution systems. At the continental and national scale, improved high voltage grids should allow the transmission and balance of electricity from hot-spots of variable renewable energy generation installations to demand centres. At the regional and municipal scale, the medium and low voltage grids should be capable of bringing sufficient electricity to users and allow the integration of distributed renewable generation installations. While data on the transmission systems is widely available, spatial and attribute data of the medium and mainly the low voltage grids are scarce. Additionally, while there are plenty of studies on the requirements of the grid to allow the energy transition, there is very little information on the necessary transformation of the grid due to changes generated by the expected urbanization process. This study relies on a data set that estimates the topology of the medium and low voltage grids of Bavaria (Germany) as well as data from the LUISA territorial modelling platform of the European Commission to calculate key figures of grid requirements depending on population and land use for the current case and the decades to come. Typologies of grid requirements are proposed based on a statistical analysis of population and land use data of each square kilometre of the federal state. These typologies are extrapolated to changes in the structure of settlements that are expected in the years 2030 and 2050. Results are presented using maps with expected absolute values of grid requirements and their temporal changes for each square kilometre of the project area. Grid requirements are expected to increase in cities and to be reduced in most of the rural areas. The largest changes are expected to take place in the suburbs of the major cities. Highlights for public administration, management and planning: • Medium and low voltage grid shapes and lengths are estimated for the entire federal state of Bavaria, Germany. • On average, distribution grid length requirements per person are between 13 and 16 times larger in rural regions than in city centres. • While city centres and suburbs expect an increase in grid requirements, the total grid length of Bavaria is expected to decrease in the near future. • Suburbs of large cities are not only expected to change steadily but also to show the largest changes in grid length requirements until 2050.

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Dissertationen zum Thema "Analysis of medium voltage distribution grid"

Tendolkar, Chaitanya. "An Analysis of Geospatial Factors in Medium Voltage Grid Distribution Network Routing." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-264248.

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To provide electricity access to the population currently deprived of it, is one of the sustainable development goals. Although the number is decreasing and is below 1 billion people without access to electricity for the first time in the year 2017, there is still much to be done. At the current rate of electrification an additional approximately 550 million people of those deprived now would have access to electricity by the year 2030, but 650million would still be without electricity access. This report studies the spatial factors that affect how MV network expansion occurs. The motivation for this report comes from studying previous research work using GIS and studying the Open Source Spatial Electrification Tool (OnSSET) which is developed by the division of Energy Systems Analysis at KTH. The objective of this tool is to aid electrification planning by examining options ranging from national grid expansion to off-grid resources such as solar, wind, hydro based on spatial analysis of data. The study is conducted into two parts. First by undertaking a literature review of relevant GIS based electrification and utility planning articles, to identify the factors that contribute to the costs of grid network extension. Thereafter, existing grid networks in Malawi, Nigeria and Uganda have been analyzed to examine the correlation to the different factors identified in the literature review. A qualitative comparison is conducted between the different countries to aid the development of spatial analysis tools such as OnSSET. The observations made studying the countries in the Sub-Saharan Africa region are noted down in the results section depicting similarities in planning and implementation of the grid network. Finally, necessary suggestions are made that might supplement and help the efforts in geospatial electrification network planning tools like OnSSET. The differences between literature review and practical geospatial analysis tools is also mentioned including the challenges faced during this thesis. Att kunna förse el till befolkningen som för närvarande ej har tillgång till det är ett av de globala hållbarhetsmålen. Även om andelen av befolkningen som inte har tillgång till el sjunker och befinner sig under 1 miljard för första gången år 2017, behöver mer göras. Vid nuvarande tillväxt av antalet människor som får tillgång till el kommer ytterligare 550 miljoner ha tillgång år 2030, men 650 miljoner kommer fortfarande vara utan. Denna rapport studerar de rumsliga faktorerna som påverkar sättet som utbyggnad av MV-nätverk sker. Motiveringen till denna rapport härrör från tidigare forskning med GIS och undersökningar av Open Source Spatial Electrification Tool (OnSSET) vilket är utvecklat av enheten för Energisystemanalys på KTH. Syftet med detta verktyg är att bistå planering för elektrifiering genom att analysera såväl utbyggnad av det nationella elnätet som fristående alternativ som sol-, vind- och vattenbaserade resurser med hjälp av spatiala dataanalyser. Denna undersökning genomförs i två delar. Den första delen behandlar litterära studier av relevanta GISbaserade studier för elektrifikations och nätverksplanering,, för att identifiera faktorer som bidrar till kostnaden av nätverkets expansion. Den andra delen behandlar existerande nätverk i Malawi, Nigeria och Uganda som har analyserats för att analysera korrelationen mellan de faktorer som identifierats i den litterära undersökningen. En kvalitativ jämförelse genomförs mellan de olika länderna för att bidra till utvecklingen av rumsliga analytiska verktyg som OnSSET. Observationerna som gjorts vid undersökningen i delen av Afrika söder om Sahara är noterade i resultatsektionen som skildrar likheter i planering och implementering av rutnätverken. Slutligen är nödvändiga förslag gjorda som möjligen kan bidra till och hjälpa i arbetet för geospatial elektrifikations planeringsverktyg som OnSSET. Skillnader mellan litterära undersökningen och praktiska geospatiala analysverktyg är också nämnd inklusive utmaningarna inför denna avhandling.

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Navrátil, Stanislav. "Předpokládaná opatření v sítí VN pro naplnění závěrů NAP SG v oblasti OZE a elektromobility." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442471.

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This thesis is focused on demonstrating the impact of the implementation of decentralized distributed energy sources (mainly RES) and electromobility technologies to electrical parameters in Czech medium voltage distribution network. Thesis is divided into two main chapters. First one is a brief theoretical summary of this problematic and the second one is a practical software simulation on a real medium voltage network. Proposed implementation scenarios are based on EU and national strategic plans for time period from 2020 to 2040.

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Qi, Qi. "Benefit analysis of using soft DC links in medium voltage distribution networks." Thesis, Cardiff University, 2018. http://orca.cf.ac.uk/114978/.

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Soft DC Links are power electronic converters enabling the control of power flow between distribution feeders or networks. This thesis considers the use of Soft DC Links in Medium Voltage (MV) distribution networks to improve network operation while facilitating the integration of distributed generators (DGs). Soft DC Links include Soft Open Points (SOPs) and Medium Voltage Direct Current (MVDC) links. An SOP can be installed to replace mechanical switchgear in a network, providing controllable active power exchange between connected feeders, as well as reactive power compensation at each interface terminal. The deployment of an MVDC link enables power and voltage controls over a wider area, and facilitates the effective use of available capacity between adjacent networks. The benefits of using SOP and MVDC link in MV distribution networks were investigated. A multi-objective optimisation framework was proposed to quantify the operational benefits of a distribution network with an SOP. An optimisation method integrating both global and local search techniques was developed to determine the set-points of an SOP. It was found that an SOP can improve network operation along multiple criteria and facilitate the integration capacity of DGs. A Grid Transformer-based control method of an MVDC link was proposed, which requires only measurements at the grid transformers to determine the operation of an MVDC link. Control strategies considering different objectives were developed. The proposed control method is used in the ANGLE-DC project, which aims to trial the first MVDC link in Europe by converting an existing AC circuit to DC operation. It was found that an MVDC link can significantly increase the network hosting capacity for DG connections while reducing network losses compared to an AC line. An impact quantification of Soft DC Links was carried out on statistically-similar distribution networks, which refer to a set of networks with similar but different topological and electrical properties. A model was developed to determine the optimal allocation of Soft DC Links. It was found that a Soft DC Link can reduce the network annual cost under a wide range of DG penetration conditions. The statistical analysis provides distribution network planners with more robust decisions on the implementation of Soft DC Links.

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Tomaszewski, Michal. "Reactive power management capabilities of Swedish sub-transmission and medium voltage level grid." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-240411.

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Rising penetration of renewable energy sources in electric power grids isboth a challenge and an opportunity to optimally utilize the potential of eitherwind or PV energy sources, to stabilize operation of future power systems.Bi-directional ows between distribution and transmission system operatorscause signicant problems with keeping the voltages in the grid within admissiblelimits. This paper contains description of Oland's island mediumandlow-voltage electric power grid, ranging from 0.4 kV to 130 kV in thepurpose of quasi-static analysis of active and reactive power ows in the system.Goal of the analysis is to optimize reactive power exchange at the pointof connection with the mainland grid. In the analyzed grid system, thereis an enormous, 190 % penetration of wind sources. Capacity of the windparks connected to dedicated buses totals to 136.1 MW, that supply up to90.5 MW of load. With industry-wise reactive power capability limits, totalcontribution of wind parks reaches almost 66 MVAr, enabling to compensatedecits and extra surpluses of the reactive power in the grid. Presentedsystem is connected to the mainland's grid through one point of connection,which is simulated as Thevenin equivalent circuit. Main objective of thethesis is to test and analyze viable solutions to minimize reactive power exchangeat the point of connection at Stavlo substation connecting Oland'sand Sweden's electric grid keeping valid all necessary contingencies enforcedby current grid codes applied in Sweden as well as thermal limits of the linesand voltage limits of the system. Furthermore, state of the art of currentreactive power compensation methodologies and most promising techniquesto eciently and eectively control reactive power ow are outlined. Droopcontrol methodologies, with focus on global and local objectives, and smartgrid solutions opportunities are being tested and modeled by the authors andare comprehensively presented in this paper. Moreover, economic costs ofcontrol methods are compared. Analysis of active power losses in the systemas well as cost of implementation of alternative solutions is presented, wheremost nancially viable solutions are outlined, giving brief outlook into futureperspectives and challenges of electric power systems. It is shown that controllabilityof reactive power support by wind turbine generators can enhanceoperation of electric power grids, by keeping the reactive power ow minimizedat the boundary between grids of distribution and transmission systemoperators. Furthermore, results indicate that extra reactive power supportby wind turbine generators can lead to diminishment of active power losses inthe system. Presented system is being modeled in the PSS/E software dedicatedfor power system engineers with use of Python programming languages.Analysis of data was done either in Python or R related environments. Thesiswas written with cooperation between KTH and E.On Energidistribution AB. Hogre genomslagskraft av förnyelsebara energikällor i elnäteten är bådeen utmaning och möjlighet för att optimalt kunna utnyttja potentialen av vindkraft och PV källor, med avseende på att stabilisera driften av framtida elkraftsystem. Tvåvägsflöden mellan distributionoch transmissionsoperatörer orsakar betydande problem att hålla spänningen i nätet inom tillåtna gränsvärden.Denna uppsats innehåller en beskrivning av Ö lands mellanoch lågspänningsnät,på 0.4 kV till 130 kV i syftet att utföra en kvasistatisk analys av aktiva och reaktiva effektflöden i systemet. Målet med analysen är att optimera det reaktiva effektutbytet i kopplingspunkten med fastlandets nät. I det analyserade systemet, finns det en enorm potential på 190% genomslagskraft av vindkraft. Kapaciteten på vindkraftsparker kopplade till medtagna samlingsskenor i systemet uppgår till 136,1 MW, som tillgodoser upp till 90.5 MW last. Med industrimässigt begränsad reaktiv effektkapabilitet, uppgår vindkraftsparkernas bidrag till nästan 66 MVAr, vilken möjliggör kompensation för underskott och överskott av reaktiv effekt i nätet. Det presenterade systemet är kopplat till fastlandet genom en kopplingspunkt, där fastlandet är simulerat som en Thevenin ekvivalent. Huvudsakliga målet med denna uppsats är att testa och analysera gångbara lösningar för att minimera det reaktiva effektutbytet vid kopplingspunkten i Stävlö, som kopplar ihop Ö land med resterande nät i Sverige, samtidigt som alla nödvändiga villkor enligt nuvarande nätkoder i Sverige bibehålls, liksom termiska gränser för ledningarna och spanningsgränser för systemet. Ytterligare beskrivs den bästa tillgängliga tekniken som finns idag för reaktiv effektkompensation, och de mest lovande teknikerna för att effektivt och verkningsfullt kontrollera reaktiva effektflöden. Droop-kontroll-metodologier, med fokus på globala och lokala tillämpningar, och smarta nät-möjligheter testas och modelleras av författarna och presenterar djupgående i detta arbete. Dessutom jämförs ekonomiska kostnader för olika kontrollmetoder. Analyser av aktiva effektförluster i systemet samt kostnader för implementation av alternativa lösningar presenteras, där de flesta gångbara losningar behandlas, och ger en överskådlig bild av framtida perspektiv och utmaningar i elkraftsystemet. Det visas att vindturbiners kontroll av reaktiv effekt, kan förbättra driften av elnäten, genom att minimera det reaktiva effektflödesutbytet i gränsen mellan distributionoch transmissionsoperatörers nät. Ytterligare pekar resultat på att extra understöd av reaktiv effekt från vindturbiner kan leda till förminskning av aktiva förluster i systemet. Det presenterade systemet modelleras i mjukvaruprogrammet PSS/E dedikerat för elkraftsingenjörer med hjälp av Python. Analys av data gjordes antingen i Pythoneller R-relaterade miljöer. Detta arbete har gjorts tillsam-mans med KTH och E.ON Energidistribution AB.

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Karnama, Ahmad. "Analysis of Integration of Plug-in Hybrid Electric Vehicles in the Distribution Grid." Thesis, KTH, Elektriska energisystem, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-119243.

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The new generation of cars are so-called Plug-in Hybrid Electric Vehicles (PHEVs) which has the grid connection capability. By the introduction of these vehicles, the grid issues will be connected to the private car transportation sector for the first time. The cars from the gird perspective can be considered as a regular load with certain power factor. The effects of this type of new load in distribution grid are studied in this thesis. By modelling the cars as regular load, the effects of the cars in three distinct areas in Stockholm are investigated. The car number in each area is estimated based on the population and commercial density of electricity consumption in the three areas. Afterward, the average electricity consumption by the cars in one day is distributed among 24 hours of the day with peak load in the studied year. This distribution is done by two regulated and unregulated methods. The regulated method is based on the desired pattern of electricity consumption of PHEVs by vehicle owners. On the other hand, the regulated pattern is designed based on encouragement of the car owners to consume electricity for charging their car batteries at low-power hours of day (usually midnight hours). The power system from high voltage lines in Sweden down to 11 kV substations in Stockholm simulated in PSS/E software has been used in this study. The automation program (written in Python) is run in order to get the output report (voltage variation and losses) of the load flow calculations for different hours of day by adding the required power for PHEVs both by regulated and unregulated patterns. The results show the possibility of introducing growing number of cars till year 2050 in each area with existing grid infrastructures. Moreover, the number of cars, yearly and daily electric consumption for PHEVs in pure electric mode are shown in this project and the effects of regulated electricity consumption are investigated. It is concluded that since the car number is estimated based on the population, the areas with higher residential characteristics are more problematic for integration of PHEVs from capacity point of view. Moreover, by regulating the charging pattern of PHEVs, the higher number of PHEVs can be integrated to the grid with the existing infrastructures. In addition, the losses have been decreased in regulated pattern in comparison with unregulated pattern with the same power consumption. The voltage in different substations is within the standard boundaries by adding 100 percent of PHEVs load for both regulated and unregulated patterns in all three areas.

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Mehryoon, Shah M. "Analysis and Comparison of Power Loss and Voltage Drop of 15 kV and 20 kV Medium Voltage Levels in the North Substation of the Kabul Power Distribution System by CYMDIST." Ohio University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1258137124.

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Mehryoon, Shah M. "Analysis and comparison of power loss and voltage drop of 15 kV and 20 kV medium voltage levels in the north substation of the Kabul power distrubution system by CYMDIST." Ohio : Ohio University, 2009. http://www.ohiolink.edu/etd/view.cgi?ohiou1258137124.

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Gamal, Abdel-Latif Hemdan Nasser [Verfasser], and Michael [Akademischer Betreuer] Kurrat. "Analysis and Optimization of medium Voltage Distribution Networks with Integration of Decentralized Generation / Nasser Gamal Abdel-Latif Hemdan ; Betreuer: Michael Kurrat." Braunschweig : Technische Universität Braunschweig, 2011. http://d-nb.info/1175825816/34.

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Yu, Jianghui. "DC Fault Current Analysis and Control for Modular Multilevel Converters." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/78054.

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Recent research into industrial applications of electric power conversion shows an increase in the use of renewable energy sources and an increase in the need for electric power by the loads. The Medium-Voltage DC (MVDC) concept can be an optimal solution. On the other hand, the Modular Multilevel Converter (MMC) is an attractive converter topology choice, as it has advantages such as excellent harmonic performance, distributed energy storage, and near ideal current and voltage scalability. The fault response, on the other hand, is a big challenge for the MVDC distribution systems and the traditional MMCs with the Half-Bridge submodule configuration, especially when a DC short circuit fault happens. In this study, the fault current behavior is analyzed. An alternative submodule topology and a fault operation control are explored to achieve the fault current limiting capability of the converter. A three-phase SiC-based MMC prototype with the Full-Bridge configuration is designed and built. The SiC devices can be readily adopted to take advantage of the wide-bandgap devices in MVDC applications. The Full-Bridge configuration provides additional control and energy storage capabilities. The full in-depth design, controls, and testing of the MMC prototype are presented, including among others: component selection, control algorithms, control hardware implementation, pre-charge and discharge circuits, and protection scheme. Systematical tests are conducted to verify the function of the converter. The fault current behavior and the performance of the proposed control are verified by both simulation and experiment. Fast fault current clearing and fault ride-through capability are achieved. Master of Science

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Hajek, Martin. "Analysis of potential applications and business models for battery energy storage systems on a low and medium voltage distribution systems in Brazil." reponame:Repositório Institucional da UFPR, 2017. http://hdl.handle.net/1884/53408.

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Orientador : Prof. Dr. Alexandre Rasi Aoki Coorientadores : Prof. Dr. Patricio Rodolfo Impinnisi ; Prof. Dr. Hans-Georg Schweiger Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Tecnologia, Programa de Pós-Graduação em Engenharia Elétrica. Defesa: Curitiba, 22/05/2017 Inclui referências : p. 221-227 Resumo: A escassez de recursos, o aquecimento global e os desastres naturais aumentaram a conscientização ambiental e desencadearam notáveis esforços de transformação em todo o mundo, afastando da geração baseada em fontes fósseis para a geração de recursos energéticos renováveis na última década. A tendência global de Sistemas de Armazenamento de Energia Elétrica, especialmente as baterias, é uma promissora solução para a qualidade e segurança dos futuros sistemas de redes elétricas inteligentes com uma elevada quota de produção de energia renovável. A aplicabilidade e o desempenho técnico e econômico dos sistemas de baterias distribuídas dependem fortemente de múltiplas questões, que incluem a localização do projeto, o ambiente, as regulamentações do mercado da eletricidade, a aplicação, a tecnologia, a propriedade e o regime de remuneração. Desta forma, o conhecimento e as melhores práticas para a utilização da bateria distribuída, desenvolvidos em diferentes ambientes, não podem ser aplicados diretamente no cenário nacional, mas as circunstâncias e necessidades locais precisam ser estudadas e soluções adequadas e customizadas identificadas. Alinhada com os esforços mundiais em P&D para melhorar o desempenho técnico-econômico das tecnologias de baterias, a última solicitação pública de projetos estratégicos de P&D da Agência Nacional de Energia Elétrica (ANEEL) tem como objetivo identificar aplicações razoáveis e modelos de negócios para sistemas distribuídos de armazenamento de energia no Brasil. O objetivo deste trabalho é desenvolver um método para identificar como os sistemas distribuídos de baterias podem ser usados para melhorar a qualidade das redes de eletricidade renovável a nível nacional. Para isso, foi realizada uma pesquisa bibliográfica sobre os fundamentos das tecnologias e aplicações de baterias, seguida de uma coleta de dados sobre o estado da arte em P&D para sistemas de baterias distribuídas. O mercado brasileiro de eletricidade é estudado em termos de estrutura geral, partindo da participação e regulamentação relevante para geração distribuída e aplicação de armazenamento. Apresenta-se uma visão geral de todos os dados relevantes e do processo desenvolvido e detalhado, para identificar modelos de negócios apropriados para aplicação de bateria distribuída. Com base no resultado do último convite à apresentação de propostas do projeto estratégico de pesquisa e desenvolvimento, denominado Chamada 21, é criado um modelo para sistemas de armazenamento distribuído no Brasil para os próximos quatro anos, incluindo uma classificação das seis principais classificações de tipos e aplicações de baterias. A funcionalidade do método desenvolvido é comprovada pela identificação de um projeto exemplo de utilização distribuída do sistema de bateria para cada uma das classificações identificadas a partir do modelo brasileiro. Sob condições atuais de mercado e meio ambiente, esses projetos são simulados em termos de desempenho técnico-econômico com o programa de simulação de redes elétricas inteligentes no Homer Energy. Os resultados de custo e desempenho são comparados com soluções convencionais, para identificar a adequação de sistemas de baterias distribuídas e potenciais nichos de mercado. Em termos de eletrificações isoladas de fora da rede, em pequena escala, já foram identificados custos de operação global vantajosos. O método e o programa de simulação utilizado revelaram-se ferramentas razoáveis para identificar modelos de negócios para aplicações de bateria distribuída no Brasil e calcular as estruturas de cálculo de custos esperadas. Palavras-chave: Bateria, Modelo de Negócio, Baixa Tensão, Media Tensão, Brasil, Armazenamento de Energia Elétrica Abstract: Resource scarcity, global warming and environmental disasters increased environmental awareness and unleashed remarkable worldwide transformation efforts away from fossil to renewable energy resources based generation during the last decade. There is a global trend for Electrical Energy Storage Systems (ESS) and especially batteries are one of the promising solutions for quality and safety in future, smart electricity networks with high shares of fluctuating renewable energy generation. Applicability and technical economic performance of distributed battery systems are strongly dependent on multiple issues, which include the project location, environment, electricity market regulations, application, technology, ownership and remuneration scheme. This way, knowledge and best practice for distributed battery utilization, developed in different environments, cannot be transferred directly to the national case, but local circumstances and needs have to be studied and appropriate, customized solutions identified. Aligned with the worldwide efforts on R&D to improve techno-economic performance of battery technologies, the latest public call for strategic R&D projects from the Brazilian Electricity Regulatory Agency - ANEEL, aims to identify reasonable applications and business models for distributed energy storage systems in Brazil. Objective of this work is to develop a method to identify how distributed battery systems can be used to improve the quality of renewable electricity networks on a nationalized level. To reach this, a literature research on the fundaments of battery technologies and applications, followed by a data collection on the state of the art in R&D for distributed battery systems are executed. The Brazilian electricity market is studied in terms of general structure, participation parties and relevant regulatory for distributed generation and storage application. An overview of all relevant data and the developed, detailed process, to identify appropriate business models for distributed battery application are presented. Based on the outcome of the last Public call for proposals from the strategic R&D project, known as Chamada 21, a roadmap for distributed storage systems in Brazil for the next four years is created, including a classification in six main classifications of battery types and applications. The functionality of the developed method is proved by identification of one exemplary project of distributed battery system utilization for each of the identified classifications from the Brazilian road map. Under current market and environment conditions, these projects are further simulated in terms of techno economic performance with the smart grid simulation program Homer Energy. The results of cost and performance are compared with conventional solutions, to identify the suitability of distributed battery systems and potential market niches. In terms of small scale, isolated off-grid electrifications there have been already advantageous overall operation cost identified. The method as well as the utilized simulation program turned out to be reasonable tools to identify business models for distributed battery applications in Brazil and calculate the expected costing structures. Keywords: Battery Energy Storage. Business Case. Low Voltage. Medium Voltage. Brazil. Electricity Storage.

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Chemetova, Svetlana, Paulo Santos, and Mário Ventim-Neves. "Load Forecasting in Electrical Distribution Grid of Medium Voltage." In Technological Innovation for Cyber-Physical Systems. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-31165-4_33.

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Čučuković, Jasmina, and Faruk Hidić. "Fault Identification in Electrical Power Distribution System – Case Study of the Middle Bosnia Medium Voltage Grid." In Advanced Technologies, Systems, and Applications III. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-02574-8_17.

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Macić, Dino, and Mirza Šarić. "Connecting a Group of Small Hydropower Plants on the Side of Neretvica River to a Medium Voltage Distribution Grid." In Lecture Notes in Networks and Systems. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-71321-2_6.

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Stifter, Matthias, Stefan Übermasser, and Sawsan Henein. "Agent-Based Impact Analysis of Electric Vehicles on a Rural Medium Voltage Distribution Network Using Traffic Survey Data." In Communications in Computer and Information Science. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38061-7_38.

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Mansour, Diaa-Eldin A., and M. M. Eissa. "Dynamic Modeling and Fault Analysis of Medium-Voltage Direct Current Microgrids." In Medium Voltage Direct Current Grid. Elsevier, 2019. http://dx.doi.org/10.1016/b978-0-12-814560-9.00006-9.

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Leemput, Niels, Juan Van Roy, Frederik Geth, Johan Driesen, and Sven De Breucker. "Grid and Fleet Impact Mapping of EV Charge Opportunities." In Data Science and Simulation in Transportation Research. IGI Global, 2014. http://dx.doi.org/10.4018/978-1-4666-4920-0.ch017.

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This chapter assesses the impact of different technical solutions and their impact on the ability of a fleet of plug-in hybrid electric vehicles to drive in electric mode as much as possible. The technical solutions covered in this chapter to attain this objective include: charging at low and medium power; charging at home, at work, and at other locations; and using fleets with small, medium, and large battery sizes. The driving behavior of the fleet is modeled using an availability analysis based on statistical data from Flanders and The Netherlands. The fleet itself is based on data of the Flemish vehicle segmentation, while the electric consumption of each segment is determined based on realistic vehicle data and driving cycles. This data is combined into different scenarios for which the utility factor, the energy consumption, the grid impact, and the battery utilization is investigated. Based on these scenario guidelines concerning the appropriate charge power at different locations and the distribution of charge locations, the expected grid impact and utility factor of different fleets are formulated.

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Konferenzberichte zum Thema "Analysis of medium voltage distribution grid"

Zhengzhong, Liang, and Zhu Guofang. "Analysis of earth currents in a medium-voltage distribution network with three-core cables." In 2015 IEEE Innovative Smart Grid Technologies - Asia (ISGT ASIA). IEEE, 2015. http://dx.doi.org/10.1109/isgt-asia.2015.7387029.

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Ge, Shao-yun, Yang Liu, Hong Liu, and Jun Han. "Construction of Analysis Models Applied in Secondary Grid of Medium Voltage Distribution Network." In 2012 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC). IEEE, 2012. http://dx.doi.org/10.1109/appeec.2012.6307459.

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Aksoy, Alkan, Mehmet Celebi, and Fatih Mehmet Nuroglu. "Technical and Economical Analysis of Medium Voltage Distribution Grid of Erzurum on Overload Condition." In 2019 11th International Conference on Electrical and Electronics Engineering (ELECO). IEEE, 2019. http://dx.doi.org/10.23919/eleco47770.2019.8990485.

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Coutinho, Matheus Dimanski, Marcelo Brunoro, and Daniel Campos Pompermayer. "Analysis of the Impact of Photovoltaic Distributed Generation on a Medium Voltage Distribution Grid." In 2021 14th IEEE International Conference on Industry Applications (INDUSCON). IEEE, 2021. http://dx.doi.org/10.1109/induscon51756.2021.9529782.

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Mehmed-Hamza, Mediha E., Anton B. Filipov, and Milena D. Ivanova. "Research and Analysis of Faults in Medium Voltage Distribution Grids." In 2021 56th International Scientific Conference on Information, Communication and Energy Systems and Technologies (ICEST). IEEE, 2021. http://dx.doi.org/10.1109/icest52640.2021.9483457.

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Adinolfi, F., F. Baccino, M. Marinelli, S. Massucco, and F. Silvestro. "Model of a real medium voltage distribution network for analysis of distributed generation penetration in a SmartGrid scenario." In 2012 3rd IEEE PES Innovative Smart Grid Technologies Europe (ISGT Europe). IEEE, 2012. http://dx.doi.org/10.1109/isgteurope.2012.6465800.

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Bosovic, Adnan, Mustafa Music, and Salih Sadovic. "Analysis of the impacts of plug-in electric vehicle charging on the part of a real medium voltage distribution network." In 2014 IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT-Europe). IEEE, 2014. http://dx.doi.org/10.1109/isgteurope.2014.7028830.

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Grama, Catalin;, and Costin Marius Grigorescu. "Analysis of the reliability indicators for the switching equipment used in the medium voltage grid of FDEE Electrica Distributie Transilvania Sud." In 2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM). IEEE, 2012. http://dx.doi.org/10.1109/optim.2012.6231873.

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"Machine Modelling for Transient Stability Analysis in Distribution Grids - A Comparison of Synchronous and Induction Machine Models in Medium and Low Voltage Grids." In 2nd International Conference on Simulation and Modeling Methodologies, Technologies and Applications. SciTePress - Science and and Technology Publications, 2012. http://dx.doi.org/10.5220/0004055603670376.

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N. Lopes, Gabriela, Luiz H. P. C. Trondoli, and José Carlos M. Vieira. "Analysis of High Impedance Faults Current Using Fourier, Wavelet and Stockwell Transforms." In Simpósio Brasileiro de Sistemas Elétricos - SBSE2020. sbabra, 2020. http://dx.doi.org/10.48011/sbse.v1i1.2290.

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Detection of high impedance faults (HIFs) in distribution systems is a challenging task, which has attracted the interest of the researchers for decades. The HIF current random behavior and its lowmagnitude cause difficulties for a reliable detection by traditional protection methods. Therefore, the hazards for grid devices, people and animals safety, associated with HIFs, motivate the research of new detection techniques. However, there is no fully efficient solution for this problem. In this context, this paper aimed to characterize HIFs by a set of real measurements considering different type of soils employing Fourier (FT), Wavelet (WT) and Stockwell Transforms (ST). The measurements were performed at the fault spot in a medium voltage test field specially built for this purpose. The idea is to highlight key characteristics of the HIF current waveforms pointed out by each of transform and assess which ones can be used as a promising tool for HIF detection. The results showed that the HIF current can be characterized by the interharmonic behavior during the fault, extracted by FT and by the high degree of energy variations at specific decomposition levels of WT and ST.

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