发布求助
文献互助 智能选刊 最新文献

B&H Electrical Engineering最新文献

筛选
英文 中文
Estimation of Two-Layer Soil Parameters Using Gradient Method Accelerated with Atkin’s δ2 Method 用Atkin δ2法加速梯度法估计两层土壤参数
B&H Electrical Engineering Pub Date : 2022-12-01 DOI: 10.2478/bhee-2022-0007
Nedis Dautbašić, D. Dujak
{"title":"Estimation of Two-Layer Soil Parameters Using Gradient Method Accelerated with Atkin’s δ2 Method","authors":"Nedis Dautbašić, D. Dujak","doi":"10.2478/bhee-2022-0007","DOIUrl":"https://doi.org/10.2478/bhee-2022-0007","url":null,"abstract":"Abstract An efficient method for evaluation of an optimal two-layer soil model from Wenner four-probe measuring method, which has been used during experimental investigations, is presented within this paper. A two-layer soil model is assumed, and this soil model is an adequate representation of nonhomogeneous soil for grounding system design. The application of optimization techniques is required to estimate the electrical parameters of the proposed soil model. In this paper, first the fast gradient-descent method to solve a given optimization problem is chosen, and then with the aim of faster calculation for accelerating the rate of convergence of an infinite sum, the application of Aitken’s δ2 method is proposed.","PeriodicalId":236883,"journal":{"name":"B&H Electrical Engineering","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123587810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Impact of Charging Stations for Electric Vehicles on the Power Distribution Network 电动汽车充电站对配电网的影响
B&H Electrical Engineering Pub Date : 2022-12-01 DOI: 10.2478/bhee-2022-0015
Mile Međugorac, T. Capuder, D. Bago, S. Sušac, Matej Marijanović
{"title":"Impact of Charging Stations for Electric Vehicles on the Power Distribution Network","authors":"Mile Međugorac, T. Capuder, D. Bago, S. Sušac, Matej Marijanović","doi":"10.2478/bhee-2022-0015","DOIUrl":"https://doi.org/10.2478/bhee-2022-0015","url":null,"abstract":"Abstract The paper describes the impact of the load increase caused by the connection of electric vehicle (EV) charging stations in the power distribution network. The power distribution network model was created using the professional software tool DIgSILENT PowerFactory (DPF). Analyses were carried out for the cases of connecting a different number of EV charging stations to 0.4 kV busbars of distribution transformer stations (TS). The results of voltage conditions and loading of the most loaded distribution substations are shown. Increasing the load results in an increase in losses in the network, which is particularly significant today since the prices of electrical energy on the market are currently at historically high levels. Distribution System Operator (DSO) should pay attention to the problem of losses increase in the network, and in addition to classic solutions in strengthening the network, the DSO should also consider modern solutions such as the flexibility of new consumers.","PeriodicalId":236883,"journal":{"name":"B&H Electrical Engineering","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124130722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Organic Materials for Electronic and Thermoelectric Applications 电子和热电应用的有机材料
B&H Electrical Engineering Pub Date : 2022-12-01 DOI: 10.2478/bhee-2022-0011
Z. Akšamija, Muhamed Duhandžić
{"title":"Organic Materials for Electronic and Thermoelectric Applications","authors":"Z. Akšamija, Muhamed Duhandžić","doi":"10.2478/bhee-2022-0011","DOIUrl":"https://doi.org/10.2478/bhee-2022-0011","url":null,"abstract":"Abstract In this invited review article, we give a comprehensive account of the existing literature on the electronic properties of organic materials. The main focus of this article is the rich and extensive literature on the electronic transport in organic materials, particularly conjugated polymers, as they offer numerous advantages over inorganic materials. Consequently, they have found widespread application in photovoltaics, light-emitting displays, and even, more recently, in thermoelectric energy conversion. This literature review will be useful to researchers starting in the field of organic electronics as well as experts seeking to broaden their understanding of transport in polymers.","PeriodicalId":236883,"journal":{"name":"B&H Electrical Engineering","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129227636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Resource Allocation and Impact Analysis of the System Parameters on Performance in Multi-Cell Massive MIMO Networks 多小区大规模MIMO网络中资源分配及系统参数对性能的影响分析
B&H Electrical Engineering Pub Date : 2022-12-01 DOI: 10.2478/bhee-2022-0012
Samira Mujkic, S. Kasapovic
{"title":"Resource Allocation and Impact Analysis of the System Parameters on Performance in Multi-Cell Massive MIMO Networks","authors":"Samira Mujkic, S. Kasapovic","doi":"10.2478/bhee-2022-0012","DOIUrl":"https://doi.org/10.2478/bhee-2022-0012","url":null,"abstract":"Abstract This paper investigates the energy-efficient resource allocation algorithm for a massive multiple input multiple output (MIMO) system, in which each base station adapts the number of antennas to the daily load profile. Our paper examines the effect of two user location distribution (ULD) models, on the energy-efficiency (EE) of load adaptive masive MIMO system. We propose a resource allocation strategy to adapt the number of antennas based on tracking variations of ULD and cell loading maximizing the EE. We also evaluate impact of cell size, available bandwidth and output power level of the BS on EE at different cell loading.","PeriodicalId":236883,"journal":{"name":"B&H Electrical Engineering","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128361789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On Treatment of Some Physical Properties of Gas in Simulation of High-Voltage SF6 Circuit Breakers 高压SF6断路器仿真中气体某些物理性质的处理
B&H Electrical Engineering Pub Date : 2022-12-01 DOI: 10.2478/bhee-2022-0009
M. Torlak, Samir Čaluk, Belma Bosović Hadžović, Amer Smajkic
{"title":"On Treatment of Some Physical Properties of Gas in Simulation of High-Voltage SF6 Circuit Breakers","authors":"M. Torlak, Samir Čaluk, Belma Bosović Hadžović, Amer Smajkic","doi":"10.2478/bhee-2022-0009","DOIUrl":"https://doi.org/10.2478/bhee-2022-0009","url":null,"abstract":"Abstract Simulation of unsteady flow of SF6 gas in a simplified high-voltage circuit breaker model describing the nozzle, contacts and their nearest surrounding is presented. SF6 is considered as viscous, compressible, real gas described by Redlich-Kwong model. Heat transfer is taken into account due to the gas compressibility. The heat source, triggered by the electric arc between the contacts, was out of the scope of the current research, thus it was not included in the simulations presented. Turbulence, caused by the gas viscosity, is described using realizable k-ε model. In the simulation model, one of the contact sides – electrodes, is considered as moving at prescribed velocity. The part of the space ‘swept’ by the moving electrode is considered as the gas with imposed artificially increased viscosity in order to imitate the rigid body behaviour. Thus, no moving parts of the computational mesh are used in the model. The conservation equations of mass, momentum and energy, given in integral form, are solved using a finite-volume method on unstructured computational grids.","PeriodicalId":236883,"journal":{"name":"B&H Electrical Engineering","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127860083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Phase Balance Optimization of Customers and Electric Vehicles in a Real Low Voltage Electricity Distribution Network 实际低压配电网中用户与电动汽车的相位平衡优化
B&H Electrical Engineering Pub Date : 2022-12-01 DOI: 10.2478/bhee-2022-0014
Naida Nalo, A. Bosovic, M. Music
{"title":"Phase Balance Optimization of Customers and Electric Vehicles in a Real Low Voltage Electricity Distribution Network","authors":"Naida Nalo, A. Bosovic, M. Music","doi":"10.2478/bhee-2022-0014","DOIUrl":"https://doi.org/10.2478/bhee-2022-0014","url":null,"abstract":"Abstract Phase unbalance is a common issue encountered in LV electricity distribution networks, caused by uneven allocation of single-phase loads among phases. This paper analyses a part of a real LV distribution network, situated in Bosnia and Herzegovina. The impact of single-phase customers and single-phase charging of electric vehicles was analysed. To reduce unbalance and improve the voltage profiles, Phase Balance Optimization in DIgSILENT PowerFactory software was performed in six scenarios with different customer and electric vehicle unbalance. The goal was to find a method with the least number of changes in the customer and electric vehicle phase connection that fits within defined limits of voltage variations and voltage unbalance of a European norm for power quality (EN 50160). Results showed that all analysed scenarios were improved, with reference to voltage variation and voltage unbalance values, and were found acceptable by the limits from standard EN 50160.","PeriodicalId":236883,"journal":{"name":"B&H Electrical Engineering","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116645781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Equivalent Circuit Parameters for Power Transformer and Implementation of Open and Short Circuit Test Simulation in Matlab (SIMULINK) 电力变压器等效电路参数及在Matlab (SIMULINK)中实现开、短路试验仿真
B&H Electrical Engineering Pub Date : 2022-12-01 DOI: 10.2478/bhee-2022-0013
Goran Kujundžić, Vinko Kalfić, D. Bago
{"title":"Equivalent Circuit Parameters for Power Transformer and Implementation of Open and Short Circuit Test Simulation in Matlab (SIMULINK)","authors":"Goran Kujundžić, Vinko Kalfić, D. Bago","doi":"10.2478/bhee-2022-0013","DOIUrl":"https://doi.org/10.2478/bhee-2022-0013","url":null,"abstract":"Abstract This paper describes the power transformer, its basic mode of operation, parts, and construction. Equivalent circuit parameters are defined, and the methods of their determination are explained. A model of the transformer in Simulink was made and the process of its production is described. The created transformer model was then simulated through open and short circuit experiments. The values of the parameters obtained by the simulation were compared with the actual values and conclusions were drawn. The main goal of this work is to determine the precision of the operation of the transformer model in Simulink, and based on the obtained results, the same model can be used in algorithms for checking the operation of the entire power system.","PeriodicalId":236883,"journal":{"name":"B&H Electrical Engineering","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129410458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of Unsymmetrical Customer and Electric Vehicle Connection on Voltage Profiles and Voltage Unbalance - Case Study Real Low Voltage Distribution Network 电压分布与电压不平衡对用户与电动汽车连接不对称的分析——以实际低压配电网为例
B&H Electrical Engineering Pub Date : 2022-12-01 DOI: 10.2478/bhee-2022-0016
Lejla Cikotić, A. Bosovic, M. Music
{"title":"Analysis of Unsymmetrical Customer and Electric Vehicle Connection on Voltage Profiles and Voltage Unbalance - Case Study Real Low Voltage Distribution Network","authors":"Lejla Cikotić, A. Bosovic, M. Music","doi":"10.2478/bhee-2022-0016","DOIUrl":"https://doi.org/10.2478/bhee-2022-0016","url":null,"abstract":"Abstract In the past couple of years, the integration of electrical vehicles (EV) in the power system has been capturing the attention of many researchers, which has led to this being a frequently analysed topic in scientific papers and seminars. Some of the main parameters related to power quality that are observed, while integrating EVs, are voltage variations and voltage unbalance. The low-voltage rural network, of a small settlement located on the outskirts of Zavidovici, has been modelled for the purpose of this paper. Several cases were considered. As the first base case, an analysis was performed when there were no connected vehicles in the network, then the case with 20% penetration, 35% penetration, and 80% vehicle penetration. Practical analysis was done in DIgSILENT Power Factory software. It has been concluded that electrical vehicles cause a voltage drop in the network, while at the same time causing an increase in voltage unbalances.","PeriodicalId":236883,"journal":{"name":"B&H Electrical Engineering","volume":"229 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126266963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Influence of Neutron and Gamma Radiation Fields on Gas-Filled Surge Arresters 中子和伽马辐射场对充气避雷器的影响
B&H Electrical Engineering Pub Date : 2022-12-01 DOI: 10.2478/bhee-2022-0008
Alija Jusić, Uzahir R. Ramadani, Dušan P. Nikezić, P. Osmokrović
{"title":"The Influence of Neutron and Gamma Radiation Fields on Gas-Filled Surge Arresters","authors":"Alija Jusić, Uzahir R. Ramadani, Dušan P. Nikezić, P. Osmokrović","doi":"10.2478/bhee-2022-0008","DOIUrl":"https://doi.org/10.2478/bhee-2022-0008","url":null,"abstract":"Abstract The study examines the effect of neutron and gamma radiation on commercial gas surge arresters. The research is of experimental-theoretical nature. The experimental part of the research was performed un-der well-controlled laboratory conditions. The combined measurement uncertainty was about 5%. The experimental system is specially designed for the observed problem and has certain original solutions. The test procedure was fully automated and had software support in the experiment management and also for data collection and statistical processing. The obtained results show that neutron and gamma ra-diation improves the functional characteristics of gas surge arresters with a memory effect. The obtained results are explained in accordance with the theory of interaction of neutron and gamma fields with ma-terial and with the theory of electric discharge in gases. The results presented in this study are important for the design of surge protection in systems that can be found in the field of neutron and gamma radia-tion because they can achieve a positive synergistic effect of protection in hybrid schemes with other components for surge protection whose characteristics spoil this radiation.","PeriodicalId":236883,"journal":{"name":"B&H Electrical Engineering","volume":"216 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134188268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Adaptive Underfrequency Load Shedding And Voltage Stability In The Power System 电力系统自适应低频减载与电压稳定
B&H Electrical Engineering Pub Date : 2022-07-01 DOI: 10.2478/bhee-2022-0001
Maja Muftić Dedović, Nedis Dautbašić, Ajdin Alihodžić, Adin Memić
{"title":"Adaptive Underfrequency Load Shedding And Voltage Stability In The Power System","authors":"Maja Muftić Dedović, Nedis Dautbašić, Ajdin Alihodžić, Adin Memić","doi":"10.2478/bhee-2022-0001","DOIUrl":"https://doi.org/10.2478/bhee-2022-0001","url":null,"abstract":"Abstract Underfrequency load shedding is a common technique for maintaining the stability of the power system by removing the overload in a certain part of the system after a disturbance. The purpose of underfrequency load shedding is to balance output and load when a particular event causes a significant frequency drop in the power system. In conventional underfrequency load shedding schemes, the frequency thresholds of frequency relays are constant, this way it is difficult and sometimes impossible to control the frequency in various disturbances in the system. In this paper, an adaptive underfrequency load shedding (AUFLS) algorithm that is independent of communication between relays is presented. The relays are tuned to reduce loads taking into account local parameters such as voltage and frequency to prevent the occurrence of a cascade failure that can ultimately lead to the breakdown of the entire power system. In this paper, the rate of change of frequency (ROCOF) is obtained by applying the Hilbert-Huang transformation. Numerical simulations conducted on the New England 39 bus test system in the DIgSILENT PowerFactory and MATLAB software packages confirm the effectiveness of the proposed approach.","PeriodicalId":236883,"journal":{"name":"B&H Electrical Engineering","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125363846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信