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Journal articles on the topic 'Analysis of medium voltage distribution grid'

Author: Grafiati

Published: 28 June 2021

Last updated: 1 February 2022

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1

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 attemp

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2

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 imagin

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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 involv

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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 i

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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

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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 PE

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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

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Lazaropoulos, Athanasios G. "Broadband over Power Lines Systems Convergence: Multiple-Input Multiple-Output Communications Analysis of Overhead and Underground Low-Voltage and Medium-Voltage BPL Networks." ISRN Power Engineering 2013 (September 15, 2013): 1–30. http://dx.doi.org/10.1155/2013/517940.

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This review paper reveals the broadband potential of overhead and underground low-voltage (LV) and medium-voltage (MV) broadband over power lines (BPL) networks associated with multiple-input multiple-output (MIMO) technology. The contribution of this review paper is fourfold. First, the unified value decomposition (UVD) modal analysis is introduced. UVD modal analysis is a new technique that unifies eigenvalue decomposition (EVD) and singular value decomposition (SVD) modal analyses achieving the common handling of traditional SISO/BPL and upcoming MIMO/BPL systems. The validity of UVD modal

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Schultis, Daniel-Leon, and Albana Ilo. "Behaviour of Distribution Grids with the Highest PV Share Using the Volt/Var Control Chain Strategy." Energies 12, no. 20 (2019): 3865. http://dx.doi.org/10.3390/en12203865.

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The large-scale integration of rooftop PVs stalls due to the voltage limit violations they provoke, the uncontrolled reactive power flow in the superordinate grids and the information and communications technology (ICT) related challenges that arise in solving the voltage limit violation problem. This paper attempts to solve these issues using the LINK-based holistic architecture, which takes into account the behaviour of the entire power system, including customer plants. It focuses on the analysis of the behaviour of distribution grids with the highest PV share, leading to the determination

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Yao, Sen Jing, Zheng Guo Zhu, Hua Ying Zhang, Jun Wei Cao, and Guang Yi Zhang. "The Design of Filter Parameters of Dynamic Voltage Restorer in Medium Voltage Network." Applied Mechanics and Materials 654 (October 2014): 133–41. http://dx.doi.org/10.4028/www.scientific.net/amm.654.133.

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Dynamic Voltage Compensator (DVR) is able to handle the dynamic power quality problems in distribution network, such as voltage sags and voltage unbalance, and the parameters of the output filter will have important affect on the compensation results. In this paper, the parameter design method of the output filter of a cascaded H-bridge based DVR applied in medium-voltage distribution grid is studied. Through the analysis of the case when filter inductor current has the maximum value, the theoretical expression of the relationship between the low limit of the value of filter inductor and the c

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Kotsalos, Konstantinos. "Decentralized Voltage Regulation in radial Medium Voltage Networks with high presence of Distributed Generation." U.Porto Journal of Engineering 3, no. 1 (2018): 26–38. http://dx.doi.org/10.24840/2183-6493_003.001_0003.

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The continuous growth of distributed generation along the medium voltage distribution networks (MVDN) induces multifaceted technical challenges that have to be addressed by alternative control architecture schemes beyond the centralized strategies and the fit and forget doctrine. The active participation of DG essentially drives the network to pave towards the Smart Grid concept. This paper entails a decentralized control strategy which is based on a sensitivity analysis to stipulate the proper dispatch set-points for the DGs; hence, all nodal voltages are in permissible bounds. An overview of

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Artale, Giovanni, Giuseppe Caravello, Antonio Cataliotti, et al. "A Virtual Tool for Load Flow Analysis in a Micro-Grid." Energies 13, no. 12 (2020): 3173. http://dx.doi.org/10.3390/en13123173.

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This paper proposes a virtual tool for load flow analysis in energy distribution systems of micro-grids. The solution is based on a low-cost measurement architecture, which entails low-voltage power measurements in each secondary substation and a voltage measurement at the beginning of the medium voltage (MV) feeder. The proposed virtual tool periodically queries these instruments to acquire the measurements. Then, it implements a backward–forward load flow algorithm, to evaluate the power flow in each branch and the voltage at each node. The virtual tool performances are validated using power

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Grzanic, Flammini, and Prettico. "Distribution Network Model Platform: A First Case Study." Energies 12, no. 21 (2019): 4079. http://dx.doi.org/10.3390/en12214079.

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Decarbonisation policies have recently seen an uncontrolled increase in local electricity production from renewable energy sources (RES) at distribution level. As a consequence, bidirectional power flows might cause high voltage/ medium voltage (HV/MV) transformers to overload. Additionally, not-well-planned installation of electric vehicle (EV) charging stations could provoke voltage deviations and cables overloading during peak times. To ensure secure and reliable distribution network operations, technology integration requires careful analysis which is based on realistic distribution grid m

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Hindarianto, Jepi Yuli. "Analysis Of Power Quality Effect On The Life Time Transformer." ACMIT Proceedings 5, no. 1 (2019): 57–64. http://dx.doi.org/10.33555/acmit.v5i1.75.

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In the industry that runs today, of course, electricity cannot be separated from the electricity used for all production processes. In Indonesia, currently PT. PLN (Persero) (PLN) is the only one of electrical energy provider for the medium and larger scale of industry. The electricity power for industry is usually supplied by 20 kV distribution grid. Meanwhile, industrial utilities, equipment and machinery mostly require lower voltage. Therefore, it is necessary to step down the voltage of the PLN distribution grid from 20 kV to 2 kV, 1 kV, 400 Volt or lower by using step down transformer. St

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18

Gloe, Arne, Clemens Jauch, and Thomas Räther. "Grid Support with Wind Turbines: The Case of the 2019 Blackout in Flensburg." Energies 14, no. 6 (2021): 1697. http://dx.doi.org/10.3390/en14061697.

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The work presented in this paper aims to show how modern wind turbines can help to control the frequency in a small grid which suffers from large power imbalances. It is shown for an exemplary situation, which occurred in Flensburg’s distribution grid in 2019: a major blackout, which occurred after almost two hours in islanding operation, affecting almost the entire distribution grid, which supplies approximately 55,000 households and businesses. For the analysis, a wind turbine model and a grid support controller developed at the Wind Energy Technology Institute are combined with real measure

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Saad, N. Md, M. Z. Sujod, Lee Hui Ming, et al. "Impacts of Photovoltaic Distributed Generation Location and Size on Distribution Power System Network." International Journal of Power Electronics and Drive Systems (IJPEDS) 9, no. 2 (2018): 905. http://dx.doi.org/10.11591/ijpeds.v9.i2.pp905-913.

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As the rapid development of photovoltaic (PV) technology in recent years with the growth of electricity demand, integration of photovoltaic distributed generation (PVDG) to the distribution system is emerging to fulfil the demand. There are benefits and drawbacks to the distribution system due to the penetration of PVDG. This paper discussed and investigated the impacts of PVDG location and size on distribution power systems. The medium voltage distribution network is connected to the grid with the load being supplied by PVDG. Load flow and short circuit calculation are analyzed by using DigSI

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Potenciano Menci, Sergio, Julien Le Baut, Javier Matanza Domingo, Gregorio López López, Rafael Cossent Arín, and Manuel Pio Silva. "A Novel Methodology for the Scalability Analysis of ICT Systems for Smart Grids Based on SGAM: The InteGrid Project Approach." Energies 13, no. 15 (2020): 3818. http://dx.doi.org/10.3390/en13153818.

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Information and Communication Technology (ICT) infrastructures are at the heart of emerging Smart Grid scenarios with high penetration of Distributed Energy Resources (DER). The scalability of such ICT infrastructures is a key factor for the large scale deployment of the aforementioned Smart Grid solutions, which could not be ensured by small-scale pilot demonstrations. This paper presents a novel methodology that has been developed in the scope of the H2020 project InteGrid, which enables the scalability analysis of ICT infrastructures for Smart Grids. It is based on the Smart Grid Architectu

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Kim, Juyong, Hongjoo Kim, Jintae Cho, Youngpyo Cho, Yoonsung Cho, and Sukcheol Kim. "Demonstration Study of Voltage Control of DC Grid Using Energy Management System Based DC Applications." Energies 13, no. 17 (2020): 4551. http://dx.doi.org/10.3390/en13174551.

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This paper is about the development of the real-time direct current (DC) network analysis applications for the operation of DC power systems. The applications are located in the central energy management system (EMS) and provide the operator with the optimal solution for operation in real time. Developed DC applications are not limited by voltage level. Applications can be used at all DC voltage levels such as low voltage, medium voltage and high voltage. A program configuration and sequence for analyzing the DC distribution system are suggested. Algorithms of each program are presented and th

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Montoya, Oscar Danilo, Federico Martin Serra, and Cristian Hernan De Angelo. "On the Efficiency in Electrical Networks with AC and DC Operation Technologies: A Comparative Study at the Distribution Stage." Electronics 9, no. 9 (2020): 1352. http://dx.doi.org/10.3390/electronics9091352.

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This research deals with the efficiency comparison between AC and DC distribution networks that can provide electricity to rural and urban areas from the point of view of grid energy losses and greenhouse gas emissions impact. Configurations for medium- and low-voltage networks are analyzed via optimal power flow analysis by adding voltage regulation and devices capabilities sources in the mathematical formulation. Renewable energy resources such as wind and photovoltaic are considered using typical daily generation curves. Batteries are formulated with a linear representation taking into acco

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Siodla, Krzysztof, Aleksandra Rakowska, and Slawomir Noske. "The Proposal of a New Tool for Condition Assessment of Medium Voltage Power Cable Lines." Energies 14, no. 14 (2021): 4116. http://dx.doi.org/10.3390/en14144116.

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A medium voltage (MV) cable network is a substantial component of the distribution network. Present management of this grid segment is mainly based on the failure rate analysis, i.e., a rise in the number and kind of faults on the actual line means that its technical condition is getting worse. The efficiency of the power system is low and additional costs of repair works, supply interruption, difficulties in the investment planning and operation and maintenance works are necessary. The aim of the R&D works done in the realised project is to implement the management of the MV cable network

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LIU, Changyi, Rong ZHU, and Yang WANG. "Economic Assessment and Policy Analysis on Wind Energy Development in China." Chinese Journal of Urban and Environmental Studies 05, no. 04 (2017): 1750026. http://dx.doi.org/10.1142/s2345748117500269.

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Considering rapid development and emerging new challenges of China's wind energy development, this paper summarizes and analyzes five critical problems. First, according to an economic potential assessment, if the feed-in tariff is set 0.60 Yuan/kWh, the economic potential of wind electricity of China will reach 6.63[Formula: see text]PWh, it could meet as much as 2/3 of total power demand by 2030, thus the targeted wind power proportion in future high renewable energy penetration can be achieved. Second, wind energy is abundant but little consumed in Northwest, Northeast and North China while

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Deilami, Sara, and S. M. Muyeen. "An Insight into Practical Solutions for Electric Vehicle Charging in Smart Grid." Energies 13, no. 7 (2020): 1545. http://dx.doi.org/10.3390/en13071545.

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The electrification of transportation has been developed to support energy efficiency and CO2 reduction. As a result, electric vehicles (EVs) have become more popular in the current transport system to create more efficient energy. In recent years, this increase in EVs as well as renewable energy resources (RERs) has led to a major issue for power system networks. This paper studies electrical vehicles (EVs) and their applications in the smart grid and provides practical solutions for EV charging strategies in a smart power system to overcome the issues associated with large-scale EV penetrati

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Lazaropoulos, Athanasios G. "Towards Modal Integration of Overhead and Underground Low-Voltage and Medium-Voltage Power Line Communication Channels in the Smart Grid Landscape: Model Expansion, Broadband Signal Transmission Characteristics, and Statistical Performance Metrics (Invited Paper)." ISRN Signal Processing 2012 (October 16, 2012): 1–17. http://dx.doi.org/10.5402/2012/121628.

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The established statistical analysis, already used to treat overhead transmission power grid networks, is now implemented to examine the factors influencing modal transmission characteristics and modal statistical performance metrics of overhead and underground low-voltage/broadband over power lines (LV/BPL) and medium-voltage/broadband over power lines (MV/BPL) channels associated with power distribution in smart grid (SG) networks. The novelty of this paper is threefold. First, a refined multidimensional chain scattering matrix (TM2) method suitable for overhead and underground LV/BPL and MV

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Pavón, Wilson, Esteban Inga, and Silvio Simani. "Optimal Routing an Ungrounded Electrical Distribution System Based on Heuristic Method with Micro Grids Integration." Sustainability 11, no. 6 (2019): 1607. http://dx.doi.org/10.3390/su11061607.

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This paper proposes a three-layer model to find the optimal routing of an underground electrical distribution system, employing the PRIM algorithm as a graph search heuristic. In the algorithm, the first layer handles transformer allocation and medium voltage network routing, the second layer deploys the low voltage network routing and transformer sizing, while the third presents a method to allocate distributed energy resources in an electric distribution system. The proposed algorithm routes an electrical distribution network in a georeferenced area, taking into account the characteristics o

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Зорин, Евгений Юрьевич, Александр Александрович Чепелюк, Юрий Степанович Грищук, and Владимир Владимирович Воинов. "The efficiency analysis of constructive solutions of the capacitive currents compensation plants in medium voltage power distribution grids." Bulletin of NTU "KhPI". Series: Problems of Electrical Machines and Apparatus Perfection. The Theory and Practice, no. 1 (April 17, 2019): 11–17. http://dx.doi.org/10.20998/2079-3944.2019.1.03.

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Olama, Mohammed, Jin Dong, Isha Sharma, Yaosuo Xue, and Teja Kuruganti. "Frequency Analysis of Solar PV Power to Enable Optimal Building Load Control." Energies 13, no. 18 (2020): 4593. http://dx.doi.org/10.3390/en13184593.

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In this paper, we present a flexibility estimation mechanism for buildings’ thermostatically controlled loads (TCLs) to enable the distribution level consumption of the majority of solar photovoltaic (PV) generation by local building TCLs. The local consumption of PV generation provides several advantages to the grid operation as well as the consumers, such as reducing the stress on the distribution network, minimizing voltage fluctuations and two-way power flows in the distribution network, and reducing the required battery storage capacity for PV integration. This would result in increasing

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Lazaropoulos, Athanasios G. "Practical Coupled Resonators in Domino Arrangements for Power Transmission and Distribution: Replacing Step-Down Power Transformers and Their Branches across the Power Grid." Journal of Energy 2013 (2013): 1–25. http://dx.doi.org/10.1155/2013/795835.

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This paper considers the potential of replacing step-down power transformers of the entire power grid as well as part of their transmission line branches with wireless power transfer (WPT) technology components. Exploiting the state-of-the-art evolutions in the fields of WPT technology, coupled resonators in domino arrangements—domino coupled resonator (DCR) configurations—are proposed as suitable technological substitute for step-down power transformers and are investigated in terms of performance metrics such as power transfer efficiency (PTE) and transformation ratio (TR). The contribution

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Pathan, E., S. A. Zulkifli, U. B. Tayab, and R. Jackson. "Small Signal Modeling of Inverter-based Grid-Connected Microgrid to Determine the Zero-Pole Drift Control with Dynamic Power Sharing Controller." Engineering, Technology & Applied Science Research 9, no. 1 (2019): 3790–95. http://dx.doi.org/10.48084/etasr.2465.

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This paper presents a small signal state space modeling of three-phase inverter-based microgrid (MG) system with consideration of improved droop control. The complete system matrices for one distribution source-grid connects to the local load have been elaborated by applying high, medium and low-frequency clusters to the system without considering the switching action on the inverter during power-sharing. Moreover, the final matrices will be used to determine the location of the eigenvalues for the control parameters gains due to dynamic effect of the MG, by observing the root locus graph on c

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Botton, Gianluigi, and Gilles L′Espérance. "Effects of accelerating voltage and thickness on the signal-to-noise ratio in Electron Energy Loss Spectroscopy (EELS)." Proceedings, annual meeting, Electron Microscopy Society of America 47 (August 6, 1989): 414–15. http://dx.doi.org/10.1017/s0424820100154044.

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The advantages of medium accelerating voltages (200-400KV) for EELS have been considered to be an improved jump ratio of edges and an improved signal to background ratio for an increased range of thiknesses. However, very little experimental data of the Signal to Noise Ratio (SNR) as a function of incident electron energy (Eo) can be found in the literature. The interest in performing such measurements is to investigate the effect of accelerating voltage on the detectability limits in EELS since SNR can be related to the minimum detectable fraction. In this paper, measurements made on NiO samp

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Sarstedt, Marcel, Leonard Kluß, Johannes Gerster, Tobias Meldau, and Lutz Hofmann. "Survey and Comparison of Optimization-Based Aggregation Methods for the Determination of the Flexibility Potentials at Vertical System Interconnections." Energies 14, no. 3 (2021): 687. http://dx.doi.org/10.3390/en14030687.

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The aggregation of operational active and reactive power flexibilities as the feasible operation region (FOR) is a main component of a hierarchical multi-voltage-level grid control as well as the cooperation of transmission and distribution system operators at vertical system interconnections. This article presents a new optimization-based aggregation approach, based on a modified particle swarm optimization (PSO) and compares it to non-linear and linear programming. The approach is to combine the advantages of stochastic and optimization-based methods to achieve an appropriate aggregation of

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Bharatiraja, C., and Harish Chowdary V. "Real Time Power Quality Phenomenon for Various Distribution Feeders." Indonesian Journal of Electrical Engineering and Computer Science 3, no. 1 (2016): 10. http://dx.doi.org/10.11591/ijeecs.v3.i1.pp10-16.

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Power Quality (PQ) brings more challenges to the large- scale and medium scale industries because in the recent years most of them use high efficiency and low energy devices which cause vulnerable PQ disturbances at Point of Common Coupling (PCC). In this paper, the measurement at different times during load condition and analysis of all types of disturbances occurred has been done. When large rated equipments run, the disturbance (harmonics, RMS variations, and switching transients) levels are very high and poor power factor (PF) has also appeared. Due to this poor PF, reactive power consumpt

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Dimovski, Aleksandar, Matteo Moncecchi, Davide Falabretti, and Marco Merlo. "PV Forecast for the Optimal Operation of the Medium Voltage Distribution Network: A Real-Life Implementation on a Large Scale Pilot." Energies 13, no. 20 (2020): 5330. http://dx.doi.org/10.3390/en13205330.

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The goal of the paper is to develop an online forecasting procedure to be adopted within the H2020 InteGRIDy project, where the main objective is to use the photovoltaic (PV) forecast for optimizing the configuration of a distribution network (DN). Real-time measurements are obtained and saved for nine photovoltaic plants in a database, together with numerical weather predictions supplied from a commercial weather forecasting service. Adopting several error metrics as a performance index, as well as a historical data set for one of the plants on the DN, a preliminary analysis is performed inve

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Sirviö, Katja H., Hannu Laaksonen, Kimmo Kauhaniemi, and Nikos Hatziargyriou. "Evolution of the Electricity Distribution Networks—Active Management Architecture Schemes and Microgrid Control Functionalities." Applied Sciences 11, no. 6 (2021): 2793. http://dx.doi.org/10.3390/app11062793.

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The power system transition to smart grids brings challenges to electricity distribution network development since it involves several stakeholders and actors whose needs must be met to be successful for the electricity network upgrade. The technological challenges arise mainly from the various distributed energy resources (DERs) integration and use and network optimization and security. End-customers play a central role in future network operations. Understanding the network’s evolution through possible network operational scenarios could create a dedicated and reliable roadmap for the variou

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Aziz, Israa, Hai Jin, Ihsan Abdulqadder, Zaid Hussien, Zaid Abduljabbar, and Firas Flaih. "A Lightweight Scheme to Authenticate and Secure the Communication in Smart Grids." Applied Sciences 8, no. 9 (2018): 1508. http://dx.doi.org/10.3390/app8091508.

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Self-reconfiguration in electrical power grids is a significant tool for their planning and operation during both normal and abnormal conditions. The increasing in employment of Intelligent Electronic Devices (IEDs), as well as the rapid growth of the new communication technologies have increased the application of Feeder Automation (FA) in Distribution Networks (DNs). In a Smart Grid (SG), automation equipment, such as a Smart Breaker (SB), is used. Using either a wired or a wireless network or even a combination of both, communication between the Control Center (CC) and SBs can be made. Nowa

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Ahmad, Fiaz, Akhtar Rasool, Esref Emre Ozsoy, Asif Sabanoviç, and Meltem Elitas. "Successive-over-relaxation based recursive Bayesian approach for power system configuration identification." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 36, no. 4 (2017): 1043–58. http://dx.doi.org/10.1108/compel-10-2016-0462.

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Purpose The purpose of this paper is to propose successive-over-relaxation (SOR) based recursive Bayesian approach (RBA) for the configuration identification of a Power System. Moreover, to present a comparison between the proposed method and existing RBA approaches regarding convergence speed and robustness. Design/methodology/approach Swift power network configuration identification is important for adopting the smart grid features like power system automation. In this work, a new SOR-based numerical approach is adopted to increase the convergence speed of the existing RBA algorithm and at t

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Muhammad Ridzuan, Mohd, and Sasa Djokic. "Energy Regulator Supply Restoration Time." Energies 12, no. 6 (2019): 1051. http://dx.doi.org/10.3390/en12061051.

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In conventional reliability analysis, the duration of interruptions relied on the input parameter of mean time to repair (MTTR) values in the network components. For certain criteria without network automation, reconfiguration functionalities and/or energy regulator requirements to protect customers from long excessive duration of interruptions, the use of MTTR input seems reasonable. Since modern distribution networks are shifting towards smart grid, some factors must be considered in the reliability assessment process. For networks that apply reconfiguration functionalities and/or network au

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Müller, Ulf Philipp, Birgit Schachler, Malte Scharf, et al. "Integrated Techno-Economic Power System Planning of Transmission and Distribution Grids." Energies 12, no. 11 (2019): 2091. http://dx.doi.org/10.3390/en12112091.

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The energy transition towards renewable and more distributed power production triggers the need for grid and storage expansion on all voltage levels. Today’s power system planning focuses on certain voltage levels or spatial resolutions. In this work we present an open source software tool eGo which is able to optimize grid and storage expansion throughout all voltage levels in a developed top-down approach. Operation and investment costs are minimized by applying a multi-period linear optimal power flow considering the grid infrastructure of the extra-high and high-voltage (380 to 110 kV) lev

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Ji, Shi Qi, Xiao Jie Shi, Zhe Yu Zhang, Wen Chao Cao, and Fred Wang. "Benefits of High Voltage SiC Applications in Medium Voltage Power Distribution Grids." Materials Science Forum 924 (June 2018): 875–78. http://dx.doi.org/10.4028/www.scientific.net/msf.924.875.

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This paper evaluates potential benefits of high voltage (HV) SiC devices in medium voltage (MV) distribution grids. The MV microgrid, that HV SiC devices can benefit most, is selected as the “killer application” and focused in this paper. The design and simulation are carried out to compare Si-and SiC-based grid interface converters for the quantitative benefit assessment both at converter level and system level. The SiC-based converter has significant benefits in weight and size, and shows enhanced performance and functionality on power quality, system stability and low voltage ride through (

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Hoffmann, Martin W., Stephan Wildermuth, Ralf Gitzel, et al. "Integration of Novel Sensors and Machine Learning for Predictive Maintenance in Medium Voltage Switchgear to Enable the Energy and Mobility Revolutions." Sensors 20, no. 7 (2020): 2099. http://dx.doi.org/10.3390/s20072099.

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The development of renewable energies and smart mobility has profoundly impacted the future of the distribution grid. An increasing bidirectional energy flow stresses the assets of the distribution grid, especially medium voltage switchgear. This calls for improved maintenance strategies to prevent critical failures. Predictive maintenance, a maintenance strategy relying on current condition data of assets, serves as a guideline. Novel sensors covering thermal, mechanical, and partial discharge aspects of switchgear, enable continuous condition monitoring of some of the most critical assets of

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Dib, M., M. Ramzi, and A. Nejmi. "Voltage regulation in the medium voltage distribution grid in the presence of renewable energy sources." Materials Today: Proceedings 13 (2019): 739–45. http://dx.doi.org/10.1016/j.matpr.2019.04.035.

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Kharchenko, V. A. "The getters in silicon." Izvestiya Vysshikh Uchebnykh Zavedenii. Materialy Elektronnoi Tekhniki = Materials of Electronics Engineering 21, no. 1 (2019): 5–17. http://dx.doi.org/10.17073/1609-3577-2018-1-5-17.

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The processes of gettering of fast-diffusing metal impurities and structure defects in silicon, mainly used in the production of integrated circuits, power high-voltage devices, nuclear-doped silicon, are considered. The getters based on structural defects and gas-phase getters based on chlorine-containing compounds are analyzed. It is noted that for the formation of getters on the basis of structural defects, it is necessary to create internal sources for generation of dislocations and formation of precipitate — dislocation clusters. It is shown that dislocations are generated in the mouths o

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Kaspirek, Martin, Ladislav Mikulas, David Mezera, Karel Prochazka, Pavel Santarius, and Petr Krejci. "Analysis of voltage quality parameters in MV distribution grid." CIRED - Open Access Proceedings Journal 2017, no. 1 (2017): 517–21. http://dx.doi.org/10.1049/oap-cired.2017.0148.

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Benali, Abdelkrim, Mounir Khiat, and Mouloud Denai. "Voltage profile and power quality improvement in photovoltaic farms integrated medium voltage grid using dynamic voltage restorer." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 3 (2020): 1481. http://dx.doi.org/10.11591/ijpeds.v11.i3.pp1481-1490.

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<p class="Abstract">In this paper, we have presented a simulation study to analyze the power quality of three phases medium voltage grid connected with distribution generation (DG) such as photovoltaic (PV) farms and its control schemes. The system uses two-stage energy conversion topology composed of a DC to DC boost converter for the extraction of maximum power available from the solar PV system based on incremental inductance technique and a three-level voltage source inverter (VSI) to connect PV farm to the power grid. To maintain the grid voltage and frequency within tolerance follo

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Kryltcov, Sergei, Aleksei Makhovikov, and Mariia Korobitcyna. "Novel Approach to Collect and Process Power Quality Data in Medium-Voltage Distribution Grids." Symmetry 13, no. 3 (2021): 460. http://dx.doi.org/10.3390/sym13030460.

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The paper is devoted to the development of the structure of a fast and flexible data collecting system based on the proposed approach to measure power quality indicators in three-phase medium-voltage distribution grids with an example of a Mikhailovsky mining and processing plant. The approach utilizes the properties of a space vector, obtained from grid currents and voltages with disturbed waveform, to allow faster extraction of the harmonic components compared to traditional approaches, based on the direct Fourier-transform applied to a line or phase values. During the study, the concept of

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Short, Tom A. "Arc-Flash Analysis Approaches for Medium-Voltage Distribution." IEEE Transactions on Industry Applications 47, no. 4 (2011): 1902–9. http://dx.doi.org/10.1109/tia.2011.2153810.

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Chen, Xiaofang, Li’an Chen, Dong Wang, and Qihao Chen. "Study on safety operation of medium voltage distribution network." E3S Web of Conferences 260 (2021): 02004. http://dx.doi.org/10.1051/e3sconf/202126002004.

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Aiming at the problem of safe operation in the medium voltage distribution network with neutral point grounding through small resistance, the distribution network model was built, and on this basis, MW-level photovoltaic (PV) system, doubly fed Induction generator (DFIG) wind turbine, permanent magnet synchronous generator (PMSG) wind turbine and energy storage device was connected respectively in this paper. The ground current and earth potential rise was studied when the power was delivered by mistake. The simulation results show that in the system with neutral point grounding through small

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Kuzmina, I. A. "Feasibility Assessment of Urban Electricity Distribution Networks Transition to the Voltage Level of 20 kV." Mechanical Engineering and Computer Science, no. 12 (January 4, 2018): 57–65. http://dx.doi.org/10.24108/1217.0001358.

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The article gives a feasibility assessment for increasing a voltage level of the urban electricity distribution networks from 6 and 10 kV to 20 kV.The emphasis is on the urban electricity distribution network in Moscow. It is noted that by now the reliability, efficiency and automation indicators of Moscow electrical grids are substantially lower than those of Europe, America, etc. The electrical grids in Moscow have a high wear and tear of equipment, a historically developed non-optimal structure, and a high loading level. In recent years, the situation has been significantly improved due to

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