Pub Date : 2020-10-19DOI: 10.1109/EPE51172.2020.9269270
J. Urbanský, L. Beňa, Vladimír Krištof, Marek Hvizdoš
This paper deals with forgotten element to reduce short-circuit currents - duplex reactor. Short-circuit withstand capability of electrical devices is important parameter from point of view of power system design and operation safety. If short-circuit currents exceed accessible limits there are some possibilities how to reduce them. One possibility of reducing fault currents is to use of duplex reactor in power system. This element has significant advantages in comparison to other ways of reducing short-circuit currents.
{"title":"Duplex Reactor - Forgotten Element to Reduce Short-Circuit Currents","authors":"J. Urbanský, L. Beňa, Vladimír Krištof, Marek Hvizdoš","doi":"10.1109/EPE51172.2020.9269270","DOIUrl":"https://doi.org/10.1109/EPE51172.2020.9269270","url":null,"abstract":"This paper deals with forgotten element to reduce short-circuit currents - duplex reactor. Short-circuit withstand capability of electrical devices is important parameter from point of view of power system design and operation safety. If short-circuit currents exceed accessible limits there are some possibilities how to reduce them. One possibility of reducing fault currents is to use of duplex reactor in power system. This element has significant advantages in comparison to other ways of reducing short-circuit currents.","PeriodicalId":177031,"journal":{"name":"2020 21st International Scientific Conference on Electric Power Engineering (EPE)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121616611","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}
Pub Date : 2020-10-19DOI: 10.1109/EPE51172.2020.9269269
Luděk Pelikán, Michal Krbal, J. Orságová
Paper focuses on simulating a real impulse generator in LTspice in such a way that it is close to real conditions. There is a description of comparison of measured and simulated important monitored values. These are the front time $T_{1}$ and the time to half value $tau_{2}$, which are the monitored parameter of waves for each atmospheric impulse voltage test.
{"title":"Simulation of Impulse Generator Followed by Practical Verification","authors":"Luděk Pelikán, Michal Krbal, J. Orságová","doi":"10.1109/EPE51172.2020.9269269","DOIUrl":"https://doi.org/10.1109/EPE51172.2020.9269269","url":null,"abstract":"Paper focuses on simulating a real impulse generator in LTspice in such a way that it is close to real conditions. There is a description of comparison of measured and simulated important monitored values. These are the front time $T_{1}$ and the time to half value $tau_{2}$, which are the monitored parameter of waves for each atmospheric impulse voltage test.","PeriodicalId":177031,"journal":{"name":"2020 21st International Scientific Conference on Electric Power Engineering (EPE)","volume":"429 1-3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116570795","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}
Pub Date : 2020-10-19DOI: 10.1109/EPE51172.2020.9269232
Lavr Vetoshkin, Z. Müller
The adoption of renewable energy sources leads to lower grid inertia, which brings more complications to operators of electrical grids. New control strategies for power electronics try to cope with that problem by introducing virtual inertia. Sychronverter is one of the promising algorithms. Furthermore, other control techniques combined with synchronverter might improve stability. Model predictive control (MPC) has proven to be a good tool in real applications. Therefore, the authors present a simplified mathematical model of a PV power plant with a synchronverter. The paper also proves that the presented model can be applied to MPC for synchronverter. Depending on the stated objective, MPC for synchronverter can bring different advantages to the control of grid converters.
{"title":"A supervisory MPC for synchronverter","authors":"Lavr Vetoshkin, Z. Müller","doi":"10.1109/EPE51172.2020.9269232","DOIUrl":"https://doi.org/10.1109/EPE51172.2020.9269232","url":null,"abstract":"The adoption of renewable energy sources leads to lower grid inertia, which brings more complications to operators of electrical grids. New control strategies for power electronics try to cope with that problem by introducing virtual inertia. Sychronverter is one of the promising algorithms. Furthermore, other control techniques combined with synchronverter might improve stability. Model predictive control (MPC) has proven to be a good tool in real applications. Therefore, the authors present a simplified mathematical model of a PV power plant with a synchronverter. The paper also proves that the presented model can be applied to MPC for synchronverter. Depending on the stated objective, MPC for synchronverter can bring different advantages to the control of grid converters.","PeriodicalId":177031,"journal":{"name":"2020 21st International Scientific Conference on Electric Power Engineering (EPE)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125270429","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}
Pub Date : 2020-10-19DOI: 10.1109/EPE51172.2020.9269276
K. Friedl, R. Schürhuber
This article describes the method for magnetic field evaluation according to Directive 2013/35/EU and the Austrian implementation (VEMF). It focuses on a method using a harmonic factor in order to consider harmonics when evaluating multifrequency fields of energy power systems. The differences in the evaluation, and the use of different methods of consideration of the multi-frequency fields is discussed in detail with an example. The main goal is to find a simple method to prove, that the requirements of Directive 2013/35/EU are fulfilled.
{"title":"Harmonic Factors for Electromagnetic Field Evaluation in Power Systems according to 2013/35/EU","authors":"K. Friedl, R. Schürhuber","doi":"10.1109/EPE51172.2020.9269276","DOIUrl":"https://doi.org/10.1109/EPE51172.2020.9269276","url":null,"abstract":"This article describes the method for magnetic field evaluation according to Directive 2013/35/EU and the Austrian implementation (VEMF). It focuses on a method using a harmonic factor in order to consider harmonics when evaluating multifrequency fields of energy power systems. The differences in the evaluation, and the use of different methods of consideration of the multi-frequency fields is discussed in detail with an example. The main goal is to find a simple method to prove, that the requirements of Directive 2013/35/EU are fulfilled.","PeriodicalId":177031,"journal":{"name":"2020 21st International Scientific Conference on Electric Power Engineering (EPE)","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128054250","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}
Pub Date : 2020-10-19DOI: 10.1109/EPE51172.2020.9269196
J. Morávek, P. Mastný, Mateus de Paula Ramos Umbelino
The use of Lithium-based batteries is constantly rising in many different applications. They have great energy density and discharge rate, however they are quite sensitive regarding its operational limits. For a safe and efficient use of this type of battery, the use of a battery management system is mandatory. These systems are responsible for constant monitoring the battery and determining whether or not it's in operational conditions. In this paper we analyze data from a commercial Lithium-Ion battery pack that presented malfunctioning and propose a different configuration to avoid it.
{"title":"Design of High Voltage Battery Topology Based on Experience with Integrated BMS Modules","authors":"J. Morávek, P. Mastný, Mateus de Paula Ramos Umbelino","doi":"10.1109/EPE51172.2020.9269196","DOIUrl":"https://doi.org/10.1109/EPE51172.2020.9269196","url":null,"abstract":"The use of Lithium-based batteries is constantly rising in many different applications. They have great energy density and discharge rate, however they are quite sensitive regarding its operational limits. For a safe and efficient use of this type of battery, the use of a battery management system is mandatory. These systems are responsible for constant monitoring the battery and determining whether or not it's in operational conditions. In this paper we analyze data from a commercial Lithium-Ion battery pack that presented malfunctioning and propose a different configuration to avoid it.","PeriodicalId":177031,"journal":{"name":"2020 21st International Scientific Conference on Electric Power Engineering (EPE)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134331713","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}
Pub Date : 2020-10-19DOI: 10.1109/EPE51172.2020.9269241
Famous O. Igbinovia, J. Krupka, P. Hájek, Z. Muller, J. Tlustý
Electricity storage is essential to permitting the advocacy of a purely renewable electricity grid architecture. This will be the utmost resolution for devoting only random renewable electricity resources like wind and solar plants, to only meet utility base load demand of electricity consumers. Electricity storage is one of the key facilitating equipment's for the future purely renewable electricity grid architecture. Which when intelligently controlled using Internet of Renewable Energy (IoRE) has the attributes that will reward both residential/industrial electricity consumers, and electricity utility authorities. Thereby making it possible to initiate new electricity market models and smart management of cities. This write up is influenced with the desire to give perception into the prospective utilization of electricity storage technology in IoRE domain for clean and sustainable smart city implementation.
{"title":"Electricity Storage in Internet of Renewable Energy (IoRE) Domain for Sustainable Smart Cities","authors":"Famous O. Igbinovia, J. Krupka, P. Hájek, Z. Muller, J. Tlustý","doi":"10.1109/EPE51172.2020.9269241","DOIUrl":"https://doi.org/10.1109/EPE51172.2020.9269241","url":null,"abstract":"Electricity storage is essential to permitting the advocacy of a purely renewable electricity grid architecture. This will be the utmost resolution for devoting only random renewable electricity resources like wind and solar plants, to only meet utility base load demand of electricity consumers. Electricity storage is one of the key facilitating equipment's for the future purely renewable electricity grid architecture. Which when intelligently controlled using Internet of Renewable Energy (IoRE) has the attributes that will reward both residential/industrial electricity consumers, and electricity utility authorities. Thereby making it possible to initiate new electricity market models and smart management of cities. This write up is influenced with the desire to give perception into the prospective utilization of electricity storage technology in IoRE domain for clean and sustainable smart city implementation.","PeriodicalId":177031,"journal":{"name":"2020 21st International Scientific Conference on Electric Power Engineering (EPE)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128879483","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}
Pub Date : 2020-10-19DOI: 10.1109/EPE51172.2020.9269170
Kamil Števanka, D. Král, Ondřej Šťastný, R. Holomb, K. Katovský, H. Martins
This paper compares the results of the two experiments with graphite block which has 39 holes drilled into it. In one experiment most of the holes were filled with NaCl and neutron flux density was measured using Au and In activation detectors. During the second experiment, neutron flux density was measured in the graphite prism without any salt. The reaction rates were compared and analysed.
{"title":"Comparison of Neutron Flux Density in Carbon Prism filled with NaCl and Air","authors":"Kamil Števanka, D. Král, Ondřej Šťastný, R. Holomb, K. Katovský, H. Martins","doi":"10.1109/EPE51172.2020.9269170","DOIUrl":"https://doi.org/10.1109/EPE51172.2020.9269170","url":null,"abstract":"This paper compares the results of the two experiments with graphite block which has 39 holes drilled into it. In one experiment most of the holes were filled with NaCl and neutron flux density was measured using Au and In activation detectors. During the second experiment, neutron flux density was measured in the graphite prism without any salt. The reaction rates were compared and analysed.","PeriodicalId":177031,"journal":{"name":"2020 21st International Scientific Conference on Electric Power Engineering (EPE)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132629302","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}
Pub Date : 2020-10-19DOI: 10.1109/EPE51172.2020.9269216
Václav Mužik, Z. Vostracký
Industrial Internet of Things is one of the opportunities for online state monitoring, effective control and economical profitability of selected systems. The majority of electricity generated in the Czech Republic comes from conventional fossil power plants - 54% in 2018. Same fact applies to heating where approximately 82% of heat in 2018 was generated from fossil fuels. Despite the fact that energy is being saved and the efficiency on the final customer side is improving, our demand of energy is rising. Over the last few years the online measurement of operation parameters plays a big role in performance optimization and energy management. Following article describes an Open source / Matlab IIoT platform used for monitoring and possible optimization of a district heating network in a typical Czech residential district and electrical island operation of a electrical power system.
{"title":"Communication and Intelligent Control in a Power Grid Using Open Source IoT Technology","authors":"Václav Mužik, Z. Vostracký","doi":"10.1109/EPE51172.2020.9269216","DOIUrl":"https://doi.org/10.1109/EPE51172.2020.9269216","url":null,"abstract":"Industrial Internet of Things is one of the opportunities for online state monitoring, effective control and economical profitability of selected systems. The majority of electricity generated in the Czech Republic comes from conventional fossil power plants - 54% in 2018. Same fact applies to heating where approximately 82% of heat in 2018 was generated from fossil fuels. Despite the fact that energy is being saved and the efficiency on the final customer side is improving, our demand of energy is rising. Over the last few years the online measurement of operation parameters plays a big role in performance optimization and energy management. Following article describes an Open source / Matlab IIoT platform used for monitoring and possible optimization of a district heating network in a typical Czech residential district and electrical island operation of a electrical power system.","PeriodicalId":177031,"journal":{"name":"2020 21st International Scientific Conference on Electric Power Engineering (EPE)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133240132","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}
{"title":"2020 21st International Scientific Conference on Electric Power Engineering (EPE)","authors":"","doi":"10.1109/epe51172.2020","DOIUrl":"https://doi.org/10.1109/epe51172.2020","url":null,"abstract":"","PeriodicalId":177031,"journal":{"name":"2020 21st International Scientific Conference on Electric Power Engineering (EPE)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125108773","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}
Pub Date : 2020-10-19DOI: 10.1109/EPE51172.2020.9269197
M. Leinakse, J. Kilter
This paper presents an approach for clustering aggregated loads based on load class energy consumption time series, and choosing representative loads for each group. The described approach was applied in a transmission system load modelling study. The goal of the study was to choose representative loads for measurement-based modelling. The work was motivated by the limited number of available measurement devices and available personnel for data processing. The monthly energy consumption of each load class was known for each aggregated bus load. After measurement data pre-processing the larger loads were clustered using K-means algorithm, and smaller assigned to clusters. Representative loads were selected from each cluster.
{"title":"Clustering of Transmission System Loads Based on Monthly Load Class Energy Consumptions","authors":"M. Leinakse, J. Kilter","doi":"10.1109/EPE51172.2020.9269197","DOIUrl":"https://doi.org/10.1109/EPE51172.2020.9269197","url":null,"abstract":"This paper presents an approach for clustering aggregated loads based on load class energy consumption time series, and choosing representative loads for each group. The described approach was applied in a transmission system load modelling study. The goal of the study was to choose representative loads for measurement-based modelling. The work was motivated by the limited number of available measurement devices and available personnel for data processing. The monthly energy consumption of each load class was known for each aggregated bus load. After measurement data pre-processing the larger loads were clustered using K-means algorithm, and smaller assigned to clusters. Representative loads were selected from each cluster.","PeriodicalId":177031,"journal":{"name":"2020 21st International Scientific Conference on Electric Power Engineering (EPE)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115769622","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}
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