Pub Date : 2020-10-19DOI: 10.1109/EPE51172.2020.9269222
V. Elistratov, I. Kudryasheva
The program of measures to introduce modern resource-saving technologies for the most effective management of renewable resources will provide the necessary amount of energy to both the population and industrial enterprises. The energy power supply system includes energy power plants using various renewable energy sources (hydraulic, wind, solar) that create more favorable conditions for its stability modes. Unification of power plant using various renewable energy sources (hydraulic, wind, solar) in power supply system has created more favorable conditions for use of power resources. These power plants have their own features of operation modes and definite work place in the production schedule of power supply system. During power supply operation daily production schedules define an operating mode of the system as a whole, including all its elements, from generating sources to high-voltage transmission lines and distributive networks system. The results of given researches are allowed to create the methods of increasing stability, reliability and efficiency supply systems with using renewable energy sources.
{"title":"Stability and reliability of power system operation due to use of renewable energy resources","authors":"V. Elistratov, I. Kudryasheva","doi":"10.1109/EPE51172.2020.9269222","DOIUrl":"https://doi.org/10.1109/EPE51172.2020.9269222","url":null,"abstract":"The program of measures to introduce modern resource-saving technologies for the most effective management of renewable resources will provide the necessary amount of energy to both the population and industrial enterprises. The energy power supply system includes energy power plants using various renewable energy sources (hydraulic, wind, solar) that create more favorable conditions for its stability modes. Unification of power plant using various renewable energy sources (hydraulic, wind, solar) in power supply system has created more favorable conditions for use of power resources. These power plants have their own features of operation modes and definite work place in the production schedule of power supply system. During power supply operation daily production schedules define an operating mode of the system as a whole, including all its elements, from generating sources to high-voltage transmission lines and distributive networks system. The results of given researches are allowed to create the methods of increasing stability, reliability and efficiency supply systems with using renewable energy sources.","PeriodicalId":177031,"journal":{"name":"2020 21st International Scientific Conference on Electric Power Engineering (EPE)","volume":"29 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":"115286999","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/EPE51172.2020.9269212
Karlovský Pavel, Lettl Jiří, Bauer Jan
This work deals with a real-time optimum flux search control (SC). The method is integrated into Predictive Torque Control (PTC) of induction motor drive (IMD). The proposed predictive search control searches the optimum stator flux amplitude, at which the current amplitude is the lowest. The output of the SC is used as a reference for the PTC controller. As the control variable of the proposed SC, the predicted stator current vector amplitude is utilized. The method was verified experimentally on a laboratory drive with a 5.5 kW induction motor. The IMD achieves a current minimization while maintains the working point defined by the speed and load. The experiment shows good results during steady-state and sufficient performance during transients.
{"title":"Optimum Flux Search Control on Induction Motor Drive with Predictive Torque Control","authors":"Karlovský Pavel, Lettl Jiří, Bauer Jan","doi":"10.1109/EPE51172.2020.9269212","DOIUrl":"https://doi.org/10.1109/EPE51172.2020.9269212","url":null,"abstract":"This work deals with a real-time optimum flux search control (SC). The method is integrated into Predictive Torque Control (PTC) of induction motor drive (IMD). The proposed predictive search control searches the optimum stator flux amplitude, at which the current amplitude is the lowest. The output of the SC is used as a reference for the PTC controller. As the control variable of the proposed SC, the predicted stator current vector amplitude is utilized. The method was verified experimentally on a laboratory drive with a 5.5 kW induction motor. The IMD achieves a current minimization while maintains the working point defined by the speed and load. The experiment shows good results during steady-state and sufficient performance during transients.","PeriodicalId":177031,"journal":{"name":"2020 21st International Scientific Conference on Electric Power Engineering (EPE)","volume":"101 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":"122249478","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/EPE51172.2020.9269190
Ladislav Suk, Kamil Števanka, T. Petrosyan, K. Katovský
This study presents an experimental investigation of critical heat flux on Inconel 625 and compares the results with experimental work as well as correlations from literature. Tests were performed on the loop at pressure up to 300 kPa and mass flux rate up to 0.4 kg/(m2·s). The heated tube was 380 mm long with an outside and inside diameter of 9.14 mm and 8 mm respectively. The boiling crisis was achieved using DC heating and the temperature of test section was measured using K-type thermocouples. Finally, recorded values were compared to and validated with the analytical correlations from scientific literature and other experimental results.
{"title":"Validation of Results of Brno CHF Experimental Loop in Annular Channel","authors":"Ladislav Suk, Kamil Števanka, T. Petrosyan, K. Katovský","doi":"10.1109/EPE51172.2020.9269190","DOIUrl":"https://doi.org/10.1109/EPE51172.2020.9269190","url":null,"abstract":"This study presents an experimental investigation of critical heat flux on Inconel 625 and compares the results with experimental work as well as correlations from literature. Tests were performed on the loop at pressure up to 300 kPa and mass flux rate up to 0.4 kg/(m2·s). The heated tube was 380 mm long with an outside and inside diameter of 9.14 mm and 8 mm respectively. The boiling crisis was achieved using DC heating and the temperature of test section was measured using K-type thermocouples. Finally, recorded values were compared to and validated with the analytical correlations from scientific literature and other experimental results.","PeriodicalId":177031,"journal":{"name":"2020 21st International Scientific Conference on Electric Power Engineering (EPE)","volume":"36 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":"128324212","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/EPE51172.2020.9269174
D. Král, M. Zeman, J. Adam, K. Katovský, J. Svoboda, Ondřej Šťastný, J. Vrzalová, P. Tichý, J. Khushvaktov, A. Solnyshkin
This article presents a measurement of reaction rates for different reactions in NaCl samples which were irradiated by secondary neutrons from the spallation target. As target materials were used graphite and lead in two separate experiments. The reason for chloride salts utilization is their much lower price in contrast with fluoride salts. Salts are perspective material for cooling in 4th generation of fast reactors including Accelerator Driven System (ADS). The reaction rate measurement of reactions in NaCl is important for chloride salts utilization in ADS where is a quite different neutron spectrum beside fission reactors with a bigger component of high energy neutrons. The problem is that the experimental cross-sections of different possible reactions for those salts are not known therefore simulation could produce inaccurate results.
{"title":"Measurement of activation products in chloride salts irradiated by spallation neutrons","authors":"D. Král, M. Zeman, J. Adam, K. Katovský, J. Svoboda, Ondřej Šťastný, J. Vrzalová, P. Tichý, J. Khushvaktov, A. Solnyshkin","doi":"10.1109/EPE51172.2020.9269174","DOIUrl":"https://doi.org/10.1109/EPE51172.2020.9269174","url":null,"abstract":"This article presents a measurement of reaction rates for different reactions in NaCl samples which were irradiated by secondary neutrons from the spallation target. As target materials were used graphite and lead in two separate experiments. The reason for chloride salts utilization is their much lower price in contrast with fluoride salts. Salts are perspective material for cooling in 4th generation of fast reactors including Accelerator Driven System (ADS). The reaction rate measurement of reactions in NaCl is important for chloride salts utilization in ADS where is a quite different neutron spectrum beside fission reactors with a bigger component of high energy neutrons. The problem is that the experimental cross-sections of different possible reactions for those salts are not known therefore simulation could produce inaccurate results.","PeriodicalId":177031,"journal":{"name":"2020 21st International Scientific Conference on Electric Power Engineering (EPE)","volume":"8 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":"128360893","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/EPE51172.2020.9269231
Tomás Barton, M. Musílek, P. Musílek
Dynamic Thermal Line Rating (DTLR) rating is often applied in discrete time periods during which the rating is held constant. As the applied rating must always be safe under the worst case conditions, it is selected as the minimal rating over the time period. This conservative approach decreases the potential benefit of DTLR because the capacity that is over the minimum of the period is unused. This paper aims to investigate how overall rating is affected when the lengths of the DTLR discretization periods are varied. The stability under minimization property of Weibull distribution is used to derive the relation between the discretization length and the expected value of discretized wind speed. Moreover, data from 490 weather stations located across Canada are used to support the analytical result and to quantify the benefit of DTLR over a large geographical area.
{"title":"The Effect of Temporal Discretization on Dynamic Thermal Line Rating","authors":"Tomás Barton, M. Musílek, P. Musílek","doi":"10.1109/EPE51172.2020.9269231","DOIUrl":"https://doi.org/10.1109/EPE51172.2020.9269231","url":null,"abstract":"Dynamic Thermal Line Rating (DTLR) rating is often applied in discrete time periods during which the rating is held constant. As the applied rating must always be safe under the worst case conditions, it is selected as the minimal rating over the time period. This conservative approach decreases the potential benefit of DTLR because the capacity that is over the minimum of the period is unused. This paper aims to investigate how overall rating is affected when the lengths of the DTLR discretization periods are varied. The stability under minimization property of Weibull distribution is used to derive the relation between the discretization length and the expected value of discretized wind speed. Moreover, data from 490 weather stations located across Canada are used to support the analytical result and to quantify the benefit of DTLR over a large geographical area.","PeriodicalId":177031,"journal":{"name":"2020 21st International Scientific Conference on Electric Power Engineering (EPE)","volume":"22 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":"121676455","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/EPE51172.2020.9269202
T. Petrosyan, E. Melyan, K. Katovský
In the study, the model of Molten Salt Reactor was developed for Monte Carlo N-Particle Transport [1] computational code analysis. In the course of work, two main tasks were fulfilled, which are simulation of target material behavior as a neutron convertor (producer) under 800 MeV energy proton beam and criticality calculation of the designed reactor. As a result of analysis through the MCNP software, neutron flux and energy distributions obtained, as well as the value of $k_{eff}$ multiplication factor of Molten Salt Reactor for a number of different molten salts compositions assessed.
{"title":"Assessment of Various Candidate Salts Properties for Molten Salt Reactor Application by MCNP Software","authors":"T. Petrosyan, E. Melyan, K. Katovský","doi":"10.1109/EPE51172.2020.9269202","DOIUrl":"https://doi.org/10.1109/EPE51172.2020.9269202","url":null,"abstract":"In the study, the model of Molten Salt Reactor was developed for Monte Carlo N-Particle Transport [1] computational code analysis. In the course of work, two main tasks were fulfilled, which are simulation of target material behavior as a neutron convertor (producer) under 800 MeV energy proton beam and criticality calculation of the designed reactor. As a result of analysis through the MCNP software, neutron flux and energy distributions obtained, as well as the value of $k_{eff}$ multiplication factor of Molten Salt Reactor for a number of different molten salts compositions assessed.","PeriodicalId":177031,"journal":{"name":"2020 21st International Scientific Conference on Electric Power Engineering (EPE)","volume":"6 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":"126555382","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/EPE51172.2020.9269173
Petr Musil, P. Mlynek
With upcoming development of Smart Grid networks, demand on higher awareness of power grid behaviour is present. This includes expansion from higher levels of power grid to lower ones, such as distribution part of network including substations. This paper describes communication process between client and server based on protocol IEC 60870-5-104 in detail. It also includes communication scenarios for such substation with focus on its overhead communication in comparison to useful data. Types of overheads and volume analysis are presented in different communication scenarios. Measurements with real device commonly used in substations outlines recommendations and possible solutions of reducing overhead, which might be beneficial especially for low throughput communication services such as PLC, cellular networks or LPWANs.
{"title":"Overview of Communication Scenarios for IEC 60870-5-104 Substation Model","authors":"Petr Musil, P. Mlynek","doi":"10.1109/EPE51172.2020.9269173","DOIUrl":"https://doi.org/10.1109/EPE51172.2020.9269173","url":null,"abstract":"With upcoming development of Smart Grid networks, demand on higher awareness of power grid behaviour is present. This includes expansion from higher levels of power grid to lower ones, such as distribution part of network including substations. This paper describes communication process between client and server based on protocol IEC 60870-5-104 in detail. It also includes communication scenarios for such substation with focus on its overhead communication in comparison to useful data. Types of overheads and volume analysis are presented in different communication scenarios. Measurements with real device commonly used in substations outlines recommendations and possible solutions of reducing overhead, which might be beneficial especially for low throughput communication services such as PLC, cellular networks or LPWANs.","PeriodicalId":177031,"journal":{"name":"2020 21st International Scientific Conference on Electric Power Engineering (EPE)","volume":"20 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132063561","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/EPE51172.2020.9269218
Vasyl Martyshychkin, I. Haysak, Olexander Okynev, Olexey Fradkin, K. Katovský, R. Holomb, A. Tanchak
Uzhgorod National University's M-10 microtron is used for fundamental investigations of electrons, $gamma$-quanta, and neutron reactions with atomic nuclei, as well as for applied studies of the effects of irradiation on new technological materials and substances. Due to some modifications that the microtron has undergone over time, it has become possible to use it to generate neutrons.
{"title":"Generation of neutrons on Microtron M-10","authors":"Vasyl Martyshychkin, I. Haysak, Olexander Okynev, Olexey Fradkin, K. Katovský, R. Holomb, A. Tanchak","doi":"10.1109/EPE51172.2020.9269218","DOIUrl":"https://doi.org/10.1109/EPE51172.2020.9269218","url":null,"abstract":"Uzhgorod National University's M-10 microtron is used for fundamental investigations of electrons, $gamma$-quanta, and neutron reactions with atomic nuclei, as well as for applied studies of the effects of irradiation on new technological materials and substances. Due to some modifications that the microtron has undergone over time, it has become possible to use it to generate neutrons.","PeriodicalId":177031,"journal":{"name":"2020 21st International Scientific Conference on Electric Power Engineering (EPE)","volume":"75 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":"131731992","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/EPE51172.2020.9269250
J. Jiřinec, D. Rot
The aim of this article is to introduce the control system for heating of small buildings equipped with heat recovery unit and heat pump. The created control system ensures measurement of room temperature, humidity and CO2 concentration. Due to the communication with heat recovery unit and heat pump, the system allows effective control of temperature and CO2 concentration in the building. The system is prepared for future implementation to the cloud application.
{"title":"The Control System for Heating of Small Buildings with Heat Recovery unit and Heat Pump","authors":"J. Jiřinec, D. Rot","doi":"10.1109/EPE51172.2020.9269250","DOIUrl":"https://doi.org/10.1109/EPE51172.2020.9269250","url":null,"abstract":"The aim of this article is to introduce the control system for heating of small buildings equipped with heat recovery unit and heat pump. The created control system ensures measurement of room temperature, humidity and CO2 concentration. Due to the communication with heat recovery unit and heat pump, the system allows effective control of temperature and CO2 concentration in the building. The system is prepared for future implementation to the cloud application.","PeriodicalId":177031,"journal":{"name":"2020 21st International Scientific Conference on Electric Power Engineering (EPE)","volume":"43 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":"130887277","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/EPE51172.2020.9269238
Y. Skorokhod, Dmitriy Philin, S. Volskiy
DC/DC high-voltage power converters with input voltage of 1500 … 4000 V are considered. In such converters serial connection units, input current correction and galvanic separation between input and output voltages are applied. Basis power circuit and comparison criteria are chosen. Calculated equations for calculation amplitude of ripple of input current and power losses in power semiconductors for different power circuits and control algorithms are presented. Comparative analysis results of power circuits and control algorithms are presented. The article under review is of interest to researchers and developers of DC/DC high-voltage power converters, which have high requirements to consumption current quality with the use of relatively low-voltage power transistors.
{"title":"Analysis of High-Voltage Converters With Serial Connection Units And With Input Current Correction","authors":"Y. Skorokhod, Dmitriy Philin, S. Volskiy","doi":"10.1109/EPE51172.2020.9269238","DOIUrl":"https://doi.org/10.1109/EPE51172.2020.9269238","url":null,"abstract":"DC/DC high-voltage power converters with input voltage of 1500 … 4000 V are considered. In such converters serial connection units, input current correction and galvanic separation between input and output voltages are applied. Basis power circuit and comparison criteria are chosen. Calculated equations for calculation amplitude of ripple of input current and power losses in power semiconductors for different power circuits and control algorithms are presented. Comparative analysis results of power circuits and control algorithms are presented. The article under review is of interest to researchers and developers of DC/DC high-voltage power converters, which have high requirements to consumption current quality with the use of relatively low-voltage power transistors.","PeriodicalId":177031,"journal":{"name":"2020 21st International Scientific Conference on Electric Power Engineering (EPE)","volume":"17 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":"133640836","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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