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2023 23rd International Scientific Conference on Electric Power Engineering (EPE)最新文献

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Effect of Zinc Oxide Blend on Dielectric Responses of Family Cold Curing Polyurethanes 氧化锌共混物对家族冷固化聚氨酯介电响应的影响
2023 23rd International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2023-05-24 DOI: 10.1109/EPE58302.2023.10149277
Š. Hardoň, J. Kúdelčík, A. Kozáková, T. Dérer
{"title":"Effect of Zinc Oxide Blend on Dielectric Responses of Family Cold Curing Polyurethanes","authors":"Š. Hardoň, J. Kúdelčík, A. Kozáková, T. Dérer","doi":"10.1109/EPE58302.2023.10149277","DOIUrl":"https://doi.org/10.1109/EPE58302.2023.10149277","url":null,"abstract":"A experimental study of the dielectric properties of polyurethane and its mixtures containing 1% weight Zinc Oxide (ZnO) is presented. We used two types of two-component polyurethanes of the same class (VUKOL O22 and VUKOL N22) as a basic matrix for nanoparticles. A different chemical composition of polyurethanes and influence of nanoparticles affected polymer segmental dynamics. In both types of polymers decrease of real permittivity with additions of ZnO was observed due to a lower mobility of polymer chains connected to nanoparticles. Lower dielectric losses are associated with the lower relative permittivity. In frequency spectra of dissipation factor were observed local relaxation peaks, which shift to higher frequency with temperature.","PeriodicalId":210548,"journal":{"name":"2023 23rd International Scientific Conference on Electric Power Engineering (EPE)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121092729","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
A Software Tool for Setting Upstream Active Power Protection in a Meshed Distribution Network 配电网上游有功保护设置的软件工具
2023 23rd International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2023-05-24 DOI: 10.1109/EPE58302.2023.10149288
V. Krcal, D. Topolanek, Viktor Jurák, J. Orságová
{"title":"A Software Tool for Setting Upstream Active Power Protection in a Meshed Distribution Network","authors":"V. Krcal, D. Topolanek, Viktor Jurák, J. Orságová","doi":"10.1109/EPE58302.2023.10149288","DOIUrl":"https://doi.org/10.1109/EPE58302.2023.10149288","url":null,"abstract":"The paper deals with a problem of upstream active power flows in MV/LV meshed distribution networks in case of a fault at MV side. The concept of upstream active power protection (UAPP) is presented as an alternative to directional overcurrent relays. The paper contribution is focused on a software tool for calculation of the UAPP setting. Presented method is based on short-circuit faults simulations using numerical model of the network in order to define threshold values respecting limiting conditions at each MV/LV transformer. The paper discusses one-stage/two-stage and individual/global variant of setting the UAPP units. The algorithm principle is demonstrated using extensive MV/LV meshed network model with graphical illustration of derived thresholds.","PeriodicalId":210548,"journal":{"name":"2023 23rd International Scientific Conference on Electric Power Engineering (EPE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124336291","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 PV Hosting Capacity of Distribution Networks 论配电网的光伏承载能力
2023 23rd International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2023-05-24 DOI: 10.1109/EPE58302.2023.10149294
M. Lehtonen, Verner Püvi, S. Fatima, M. Pourakbari‐Kasmaei
{"title":"On PV Hosting Capacity of Distribution Networks","authors":"M. Lehtonen, Verner Püvi, S. Fatima, M. Pourakbari‐Kasmaei","doi":"10.1109/EPE58302.2023.10149294","DOIUrl":"https://doi.org/10.1109/EPE58302.2023.10149294","url":null,"abstract":"This paper provides a summary of the research regarding photovoltaic hosting capacity of the distribution networks in Finnish circumstances. Characteristic to these circumstances is high and diverse seasonal variations of electricity demand and photovoltaic generation. The paper presents key findings of the hosting capacity and discusses different methods and approaches when analyzing the hosting capacity questions both from the distribution systems operator and the prosumer point of view.","PeriodicalId":210548,"journal":{"name":"2023 23rd International Scientific Conference on Electric Power Engineering (EPE)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122671980","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
AC Breakdown Voltage Thermal Dependence in Magnetic Fluids 磁流体中交流击穿电压的热依赖关系
2023 23rd International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2023-05-24 DOI: 10.1109/EPE58302.2023.10149231
Miloš Šárpataky, M. Rajňák, J. Zbojovský, J. Kurimský
{"title":"AC Breakdown Voltage Thermal Dependence in Magnetic Fluids","authors":"Miloš Šárpataky, M. Rajňák, J. Zbojovský, J. Kurimský","doi":"10.1109/EPE58302.2023.10149231","DOIUrl":"https://doi.org/10.1109/EPE58302.2023.10149231","url":null,"abstract":"This study examines the AC breakdown voltage of novel transformer oil, produced using gas-to-liquid (GTL) technology, and two nanofluids prepared using this oil. The first nanofluid is a mono-nanofluid consisting of fullerene C60 nanoparticles at a concentration of 0.01 %w/V, while the other is a hybrid nanofluid called C60-loaded ferrofluid, which contains both fullerene C60 nanoparticles (0.01 %w/V) and iron oxide nanoparticles (0.01 %w/V). The AC breakdown voltage (BDV) of both nanofluids and the transformer oil was experimentally investigated at temperatures ranging from 30°C to 60°C. This experimental study reveals that the dielectric strength of pure GTL oil decreases with rising temperature by around 7 % when the lowest and the highest temperature values of AC BDV are compared. However, both nanofluids showed an increment in AC BDV value at higher temperatures and the differences in comparison to AC BDV at temperature 30°C were 5.7 % and 4.7 % for nanofluid with C60 nanoparticles and nanofluid with both kinds of nanoparticles, respectively. Enhancement of AC BDV value of nanofluids in comparison to pure oil increased with temperature and the maximal improvements reached values over 12 % for C60 nanofluids and up to 34 % for C60-loaded ferrofluid at the temperature 60°C.","PeriodicalId":210548,"journal":{"name":"2023 23rd International Scientific Conference on Electric Power Engineering (EPE)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117309011","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
A New Method for Fast Removal of Decaying Offset in Relaying Input Current 一种快速去除继电器输入电流中衰减偏置的新方法
2023 23rd International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2023-05-24 DOI: 10.1109/EPE58302.2023.10149233
E. Rosolowski
{"title":"A New Method for Fast Removal of Decaying Offset in Relaying Input Current","authors":"E. Rosolowski","doi":"10.1109/EPE58302.2023.10149233","DOIUrl":"https://doi.org/10.1109/EPE58302.2023.10149233","url":null,"abstract":"Phasor estimation is still the primary method of high-speed measurements used in electrical power system protection and control. Widely applied filter algorithms are based on the discrete Fourier transform (DFT), which can easily erase harmonics. However, the voltage and current waveforms that accompany short circuits in the network contain both harmonic components and decaying DC (DDC) components. Various methods of reducing the effect of the decaying aperiodic component on the accuracy of determining the amplitude and phase of the current’s fundamental component have been proposed for decades. Judging from recent publications, the issue is still relevant. The presented method proposes to change the known paradigm by including a modified signal model in the transition state of the algorithm with an expanding measurement window. The measured signal is shown to be represented by the sum of the orthogonal components of the corresponding harmonics and the mapping of the DDC components. The simulation studies conducted show the properties of the presented method.","PeriodicalId":210548,"journal":{"name":"2023 23rd International Scientific Conference on Electric Power Engineering (EPE)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131428556","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
An Intelligent Load Optimisation for Self-Powered Robotic Parking House in Inhabited Areas 居住区自供电机器人停车库的智能负载优化
2023 23rd International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2023-05-24 DOI: 10.1109/EPE58302.2023.10149287
Z. Slanina, Vojtech Blazek, J. Fulneček, Tomáš Vantuch
{"title":"An Intelligent Load Optimisation for Self-Powered Robotic Parking House in Inhabited Areas","authors":"Z. Slanina, Vojtech Blazek, J. Fulneček, Tomáš Vantuch","doi":"10.1109/EPE58302.2023.10149287","DOIUrl":"https://doi.org/10.1109/EPE58302.2023.10149287","url":null,"abstract":"This article discusses the results of a comprehensive study of an automatic parking house a modern approach to utilizing off-grid technologies with advanced load optimization to a Self-Powered Robotic Parking House (S-PRPH). S-PRPHs represent large technical solutions for parking in densely populated areas. The automatic parking building includes Automated Guide Vehicle (AGV) systems developed by the team of authors. AGV pallets are part of the parking building energy consumption. This solution solves urban parking needs, including energetic self- sufficiency, balancing between price and an optimal number of parking spaces, and the maximum use of the building surface for green areas that provide oxygen production, filtration of dust particles, and appropriate water management. Intelligent Load Optimisation (ILO) is a part of S-PRPH management and is based on the Non-dominated sorting genetic algorithm II. The article describes the results of an ILO based on multi-objective optimization and methods of demand-side management in three variants. The results of this study are due to a fundamentally positive impact on load optimization in the off-grid system’s size of building with weather conditions of Central Europe.","PeriodicalId":210548,"journal":{"name":"2023 23rd International Scientific Conference on Electric Power Engineering (EPE)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130621033","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
Compliance testing concept of grid-connected inverter-based resources using simulated input 基于模拟输入的并网逆变器资源符合性测试概念
2023 23rd International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2023-05-24 DOI: 10.1109/EPE58302.2023.10149232
J. Dvořáček, J. Drapela, J. Morávek, M. Vojtek, P. Toman, A. Rassõlkin, T. Vaimann
{"title":"Compliance testing concept of grid-connected inverter-based resources using simulated input","authors":"J. Dvořáček, J. Drapela, J. Morávek, M. Vojtek, P. Toman, A. Rassõlkin, T. Vaimann","doi":"10.1109/EPE58302.2023.10149232","DOIUrl":"https://doi.org/10.1109/EPE58302.2023.10149232","url":null,"abstract":"The paper aims at methods for compliance testing of power-generating modules (PGMs) or their components. The methods discussion include power-hardware-in-loop (PHIL), controller-hardware-in-loop and novel simulated input PHIL (SI-PHIL) techniques. The advantages and disadvantages of the test techniques and their feasibility for laboratory or field settings are presented. In the following, the SI-PHIL approach to verify selected PGM requirements related to static network support is demonstrated on an inverter based PGM model. Further discussion aims at the necessity to establish robust test methodology if SI-PHIL is to be extensively used and points out possible critical vulnerabilities of internet-connected PGMs.","PeriodicalId":210548,"journal":{"name":"2023 23rd International Scientific Conference on Electric Power Engineering (EPE)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127344264","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
Power Quality Parameters Forecasting Based on SOM Maps with KNN Algorithm and Decision Tree 基于KNN算法和决策树的SOM映射电能质量参数预测
2023 23rd International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2023-05-24 DOI: 10.1109/EPE58302.2023.10149269
I. Jahan, F. Mohamed, Vojtech Blazek, L. Prokop, S. Mišák, Václav Snášel
{"title":"Power Quality Parameters Forecasting Based on SOM Maps with KNN Algorithm and Decision Tree","authors":"I. Jahan, F. Mohamed, Vojtech Blazek, L. Prokop, S. Mišák, Václav Snášel","doi":"10.1109/EPE58302.2023.10149269","DOIUrl":"https://doi.org/10.1109/EPE58302.2023.10149269","url":null,"abstract":"This study tested four forecasting models combined with 3x3 SOM maps for predicting power quality parameters (PQPs) named decision tree (DT), KNN algorithm, bagging decision tree (BGDT), and boosting decision tree (BODT). The input variables used are weather conditions (air temperature, wind speed, air pressure, Ultraviolet, solar irradiance) with states of four types of home appliances (AC heating, light, fridge, TV) represented by one decimal number. Target Outputs are Power Voltage (U), total harmonic distortion of voltage (THDu), total harmonic distortion of current (THDi), power factor (PF), and power load (PL). The experiments were carried out in two stages: in the first stage, clustering dataset using self-organizing maps (SOM), 3x3 SOM in total nine hexagon nodes was used. In the second stage, inside each node builds four forecasting models: decision tree (DT), K-Nearest Neighbor(KNN) algorithm, bagging decision tree (BGDT), and boosting decision tree (BODT). Root Mean Square Error (RMSE) was used for evaluating the performance of studied models.","PeriodicalId":210548,"journal":{"name":"2023 23rd International Scientific Conference on Electric Power Engineering (EPE)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125256501","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
In-situ arc fault testing on MV substation 中压变电站现场电弧故障检测
2023 23rd International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2023-05-24 DOI: 10.1109/EPE58302.2023.10149244
Dominik Czeschka, K. Friedl, A. Abart
{"title":"In-situ arc fault testing on MV substation","authors":"Dominik Czeschka, K. Friedl, A. Abart","doi":"10.1109/EPE58302.2023.10149244","DOIUrl":"https://doi.org/10.1109/EPE58302.2023.10149244","url":null,"abstract":"This paper deals with the effects of an arc fault in the medium-voltage switchgear of a transformer substation (distribution substation), a common part of an electrical distribution grid. These transformer substations are widely used to step down medium voltage to low voltage and supply end-customers.The focus of the considerations is the pressure load caused on the inside of the electrical distribution substation building. For existing buildings made of masonry, hardly any literature is available taking the dynamic of the pressure load into account. However, available limit values for static pressure load might be exceeded. Due to the lack of accurate assessment methods for arc pressure loading by structural engineers, conservative approaches must be used. The costly consequence is that either great efforts must be made to limit the pressure or the distribution substation hast to be rebuilt. Therefore, an in-situ test was performed on a masonry transformer station to gain new insight into the pressure load capacity of masonry due to arcing events. The results show a higher load capacity of masonry than assumed.","PeriodicalId":210548,"journal":{"name":"2023 23rd International Scientific Conference on Electric Power Engineering (EPE)","volume":"55 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113972442","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
Experimental Investigation of Critical Heat Flux 临界热通量的实验研究
2023 23rd International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2023-05-24 DOI: 10.1109/EPE58302.2023.10149270
T. Petrosyan, Kamil Števanka, Lukáš Nesvadba, K. Katovský, Daniel Vlček
{"title":"Experimental Investigation of Critical Heat Flux","authors":"T. Petrosyan, Kamil Števanka, Lukáš Nesvadba, K. Katovský, Daniel Vlček","doi":"10.1109/EPE58302.2023.10149270","DOIUrl":"https://doi.org/10.1109/EPE58302.2023.10149270","url":null,"abstract":"Experimental studies were performed to determine the critical heat flux (CHF) during steady state flow boiling on zirconium cladding material. Experiments were conducted in a vertical, internally heated, concentric-annulus test section composed of a glass tube containing zirconium tube with outer diameter of 9.14 (mm) and the length of 365 mm. The inlet parameters were set in the ranges of pressure from 120 to 400 (kPa) in pair with the inlet temperatures from 64 to 103 (°C) and the mass flux ranged from 400 to 800 kg/m2s. During the multiple occurrences of the CHF a thin layer arose on the heated tube surface by time leading to creation of super-hydrophilic surface. The experiments were therefore divided into two sets of results based on the time spent in the test section. The total number of 69 experimental runs were collected.","PeriodicalId":210548,"journal":{"name":"2023 23rd International Scientific Conference on Electric Power Engineering (EPE)","volume":"164 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114424904","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: 2
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