Pub Date : 2017-05-01DOI: 10.1109/EPE.2017.7967354
David Lazecký, V. Král, S. Rusek, R. Goňo
The implementation of Reliability Centered Maintenance into Preventive Maintenance Plan scheduling is one of the possible paths towards cost reductions in the fields of diagnostics and operating personnel. There is also the assumption of maintaining acceptable reliability of individual devices within the entire network. The devices to be considered suitable for application of RCM concern network elements present in sufficient quantities, supported with enough experience relevant to maintenance and with the data obtained through operative measurements and protection available. This data set forms ideal fundamentals for analysis and status assessment of a particular device. Provided the current status of a system element is known and it future development can be expected, the maintenance interval can be adjusted — giving priority to PMP applicable to devices in unsatisfactory condition and postponement of PMP for devices in good condition. This paper describes the design of software for PMP priority assessment pursuant to the RCM method with respect to priority assigned to electric power supply and evaluation of consequences for customers.
{"title":"Software solution design for application of reliability centered maintenance in preventive maintenance plan","authors":"David Lazecký, V. Král, S. Rusek, R. Goňo","doi":"10.1109/EPE.2017.7967354","DOIUrl":"https://doi.org/10.1109/EPE.2017.7967354","url":null,"abstract":"The implementation of Reliability Centered Maintenance into Preventive Maintenance Plan scheduling is one of the possible paths towards cost reductions in the fields of diagnostics and operating personnel. There is also the assumption of maintaining acceptable reliability of individual devices within the entire network. The devices to be considered suitable for application of RCM concern network elements present in sufficient quantities, supported with enough experience relevant to maintenance and with the data obtained through operative measurements and protection available. This data set forms ideal fundamentals for analysis and status assessment of a particular device. Provided the current status of a system element is known and it future development can be expected, the maintenance interval can be adjusted — giving priority to PMP applicable to devices in unsatisfactory condition and postponement of PMP for devices in good condition. This paper describes the design of software for PMP priority assessment pursuant to the RCM method with respect to priority assigned to electric power supply and evaluation of consequences for customers.","PeriodicalId":201464,"journal":{"name":"2017 18th International Scientific Conference on Electric Power Engineering (EPE)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126053661","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 : 2017-05-01DOI: 10.1109/EPE.2017.7967309
Martin Motyčka, J. Skoda, Jaroslav Štěpánek
This article has task to inform a reader of uncertainties of measurement in laboratory of light, especially in integrating sphere. In the first part there are mathematical descriptions of different types of uncertainties, including the methodology for their determination. The second part is focused on detailed description of particular standard uncertainties for measurement of the luminous flux in an integrating sphere. The last section provides practical calculations and results of standard uncertainties as a wavelength function.
{"title":"The uncertainty of measurement of the luminous flux in an integrating sphere","authors":"Martin Motyčka, J. Skoda, Jaroslav Štěpánek","doi":"10.1109/EPE.2017.7967309","DOIUrl":"https://doi.org/10.1109/EPE.2017.7967309","url":null,"abstract":"This article has task to inform a reader of uncertainties of measurement in laboratory of light, especially in integrating sphere. In the first part there are mathematical descriptions of different types of uncertainties, including the methodology for their determination. The second part is focused on detailed description of particular standard uncertainties for measurement of the luminous flux in an integrating sphere. The last section provides practical calculations and results of standard uncertainties as a wavelength function.","PeriodicalId":201464,"journal":{"name":"2017 18th International Scientific Conference on Electric Power Engineering (EPE)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123494243","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 : 2017-05-01DOI: 10.1109/EPE.2017.7967264
K. Karaarslan, B. Arifoğlu, E. Beşer, S. Çamur
Harmonic voltage compensation of the load connected to the point of common coupling (PCC) by using a series of active power filter (SAPF) based on a single phase cascaded multilevel inverter is proposed. The proposed multilevel inverter are presented in detail. The inverter has the ability of acting as a harmonic source when the reference is a non-sinusoidal signal. To achieve this, a simple control technique is performed with the proposed inverter. A prototype of 7-level inverter based SAPF is manufactured without using a parallel passive filter (PPF) because it is designed to show SAPF own compensation capacity alone. Filtering ability of the SAPF is shown both in simulation and experimental studies. The validity of the proposed inverter based SAPF is verified by simulation as well as experimental study. The results show that the proposed multi-level inverter is suitable for SAPF applications.
{"title":"A novel 7-level cascaded inverter for series active power filter","authors":"K. Karaarslan, B. Arifoğlu, E. Beşer, S. Çamur","doi":"10.1109/EPE.2017.7967264","DOIUrl":"https://doi.org/10.1109/EPE.2017.7967264","url":null,"abstract":"Harmonic voltage compensation of the load connected to the point of common coupling (PCC) by using a series of active power filter (SAPF) based on a single phase cascaded multilevel inverter is proposed. The proposed multilevel inverter are presented in detail. The inverter has the ability of acting as a harmonic source when the reference is a non-sinusoidal signal. To achieve this, a simple control technique is performed with the proposed inverter. A prototype of 7-level inverter based SAPF is manufactured without using a parallel passive filter (PPF) because it is designed to show SAPF own compensation capacity alone. Filtering ability of the SAPF is shown both in simulation and experimental studies. The validity of the proposed inverter based SAPF is verified by simulation as well as experimental study. The results show that the proposed multi-level inverter is suitable for SAPF applications.","PeriodicalId":201464,"journal":{"name":"2017 18th International Scientific Conference on Electric Power Engineering (EPE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130049803","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 : 2017-05-01DOI: 10.1109/EPE.2017.7967323
Dušan Medved’, Zsolt Čonka, M. Kolcun, M. Kosterec
This paper deals with the solution of transient phenomena during the connection of the photovoltaic power plants. There was investigated the impact of the failure of current protection for renewable energy sources during the network disconnection. There was verified the possibility of network operation during the islanding operation. Failure of network protection represents the significant hazard for employees of distribution system operator so it is necessary to solve the accurate current and voltage values during the connection of particular renewable energy sources.
{"title":"Solution of transient phenomena during the connection of the photovoltaic power plants","authors":"Dušan Medved’, Zsolt Čonka, M. Kolcun, M. Kosterec","doi":"10.1109/EPE.2017.7967323","DOIUrl":"https://doi.org/10.1109/EPE.2017.7967323","url":null,"abstract":"This paper deals with the solution of transient phenomena during the connection of the photovoltaic power plants. There was investigated the impact of the failure of current protection for renewable energy sources during the network disconnection. There was verified the possibility of network operation during the islanding operation. Failure of network protection represents the significant hazard for employees of distribution system operator so it is necessary to solve the accurate current and voltage values during the connection of particular renewable energy sources.","PeriodicalId":201464,"journal":{"name":"2017 18th International Scientific Conference on Electric Power Engineering (EPE)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127953709","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 : 2017-05-01DOI: 10.1109/EPE.2017.7967355
M. Osladil, L. Kozubík
Companies in field of electricity distribution and transmission recently deal with the need for decreasing cost of operation in terms of both capital and operational expenditures. They start to use statistically driven approaches of asset management to support these requirements in a way that reliability of the grid is being kept on the same level or even improved. However, the behavior of the assets is not the same in all times as both internal and external conditions change. This means that auto-calibration of models has to be applied to get the best results possible.
{"title":"Auto-calibration of mathematical asset models: Refflecting change of behavior of energy assets","authors":"M. Osladil, L. Kozubík","doi":"10.1109/EPE.2017.7967355","DOIUrl":"https://doi.org/10.1109/EPE.2017.7967355","url":null,"abstract":"Companies in field of electricity distribution and transmission recently deal with the need for decreasing cost of operation in terms of both capital and operational expenditures. They start to use statistically driven approaches of asset management to support these requirements in a way that reliability of the grid is being kept on the same level or even improved. However, the behavior of the assets is not the same in all times as both internal and external conditions change. This means that auto-calibration of models has to be applied to get the best results possible.","PeriodicalId":201464,"journal":{"name":"2017 18th International Scientific Conference on Electric Power Engineering (EPE)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129782528","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 : 2017-05-01DOI: 10.1109/EPE.2017.7967284
J. Dzmura, Jaroslav Petráš, M. Bernát
This paper is a contribution to solid air exhale analysis, regarding to outer insulation design. It describes the method of exhale collection, their composition measurement and their chemical analysis. Further proposals are made in conclusion for solid exhale analysis.
{"title":"Solid air exhale analysis","authors":"J. Dzmura, Jaroslav Petráš, M. Bernát","doi":"10.1109/EPE.2017.7967284","DOIUrl":"https://doi.org/10.1109/EPE.2017.7967284","url":null,"abstract":"This paper is a contribution to solid air exhale analysis, regarding to outer insulation design. It describes the method of exhale collection, their composition measurement and their chemical analysis. Further proposals are made in conclusion for solid exhale analysis.","PeriodicalId":201464,"journal":{"name":"2017 18th International Scientific Conference on Electric Power Engineering (EPE)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117026855","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 : 2017-05-01DOI: 10.1109/EPE.2017.7967249
A. Halinka, P. Rzepka, P. Sowa, M. Szablicki
The paper presents an innovative concept of the new area measuring algorithm and new area decision algorithm for power lines' distance protection. These algorithms improve the operating conditions of the distance protection. The primary purpose of the new measuring algorithm is correct the short-circuit impedance calculation. The purpose of the new decision algorithm is correct identify of the line operating conditions. For the investigation of classic and proposed new distance protections, a test power network containing the accurate model of the distance protection was developed. Verification simulation studies indicate that the proposed concept achieves the stated objectives. It is expected that the practical application of these new algorithms will enable significant minimization faulty operation of classic distance protection.
{"title":"New area measuring and decision algorithm concepts for power lines' distance protection","authors":"A. Halinka, P. Rzepka, P. Sowa, M. Szablicki","doi":"10.1109/EPE.2017.7967249","DOIUrl":"https://doi.org/10.1109/EPE.2017.7967249","url":null,"abstract":"The paper presents an innovative concept of the new area measuring algorithm and new area decision algorithm for power lines' distance protection. These algorithms improve the operating conditions of the distance protection. The primary purpose of the new measuring algorithm is correct the short-circuit impedance calculation. The purpose of the new decision algorithm is correct identify of the line operating conditions. For the investigation of classic and proposed new distance protections, a test power network containing the accurate model of the distance protection was developed. Verification simulation studies indicate that the proposed concept achieves the stated objectives. It is expected that the practical application of these new algorithms will enable significant minimization faulty operation of classic distance protection.","PeriodicalId":201464,"journal":{"name":"2017 18th International Scientific Conference on Electric Power Engineering (EPE)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124329289","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 : 2017-05-01DOI: 10.1109/EPE.2017.7967339
V. Astapov, I. Palu
The operation of the off-grid system consisting of projectable PV panel array and two dieseis (one in reserve) generators SDMO J200K with 160 kW installed capacity are considered in this article. The aim of the study is to make a stability analysis of the system with an evaluation of problems can occur and their possible solutions, which keep the system operational. Three possible faults at generator, PV system and battery storage sides were simulated in DigSilent software. The results obtained for five different operational scenarios and show application possibilities in terms of the most critical regime.
{"title":"Operation and stability analysis for standalone microgrid through simulations in DigSilent software","authors":"V. Astapov, I. Palu","doi":"10.1109/EPE.2017.7967339","DOIUrl":"https://doi.org/10.1109/EPE.2017.7967339","url":null,"abstract":"The operation of the off-grid system consisting of projectable PV panel array and two dieseis (one in reserve) generators SDMO J200K with 160 kW installed capacity are considered in this article. The aim of the study is to make a stability analysis of the system with an evaluation of problems can occur and their possible solutions, which keep the system operational. Three possible faults at generator, PV system and battery storage sides were simulated in DigSilent software. The results obtained for five different operational scenarios and show application possibilities in terms of the most critical regime.","PeriodicalId":201464,"journal":{"name":"2017 18th International Scientific Conference on Electric Power Engineering (EPE)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121306324","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 : 2017-05-01DOI: 10.1109/EPE.2017.7967229
Ģ. Staņa, V. Brazis
This paper presents a method how to simulate overhead DC network transmission losses that are estimated by a variable location of an electric vehicle regarding to an invariable location of a traction substation. Electric public transport infrastructure is one of the major electrical energy consumers. Electrical energy amount which is acquired due to overhead line voltage drop and current flowing through wires is dissipated in heat and considered as energy losses. The distance between an electric vehicle and a substation is a relevant aspect that influences the amount of energy losses. Overhead DC network and trolleybus system virtual Matlab/Simulink model including a resistor subsystem for transmission loss imitation was developed. Presented energetic parameter characteristics were acquired from the chosen trolleybus Skoda 24Tr Irisbus motion simulations.
{"title":"Trolleybus motion simulation by dealing with overhead DC network energy transmission losses","authors":"Ģ. Staņa, V. Brazis","doi":"10.1109/EPE.2017.7967229","DOIUrl":"https://doi.org/10.1109/EPE.2017.7967229","url":null,"abstract":"This paper presents a method how to simulate overhead DC network transmission losses that are estimated by a variable location of an electric vehicle regarding to an invariable location of a traction substation. Electric public transport infrastructure is one of the major electrical energy consumers. Electrical energy amount which is acquired due to overhead line voltage drop and current flowing through wires is dissipated in heat and considered as energy losses. The distance between an electric vehicle and a substation is a relevant aspect that influences the amount of energy losses. Overhead DC network and trolleybus system virtual Matlab/Simulink model including a resistor subsystem for transmission loss imitation was developed. Presented energetic parameter characteristics were acquired from the chosen trolleybus Skoda 24Tr Irisbus motion simulations.","PeriodicalId":201464,"journal":{"name":"2017 18th International Scientific Conference on Electric Power Engineering (EPE)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114270583","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 : 2017-05-01DOI: 10.1109/EPE.2017.7967318
Adrian Paun, D. Vatau, F. Frigura-Iliasa, P. Andea, M. Frigura-Iliasa, F. Balcu
The effective protection of each type of sensible electronic piece of equipment against any type of over voltage (including direct or indirect lightning applied on power supply) is a big issue for power system specialists. Some of the most reliable electronic devices used in order to protect against overvoltages are all voltage metal oxide varistor based surge-arresters. These varistors are produced starting from a thick mixture of different metal oxides, where the main component (more than 80–90% as mass percentage) is ZnO. New improvements for these devices could be performed only by taking in consideration their mass production process, by placing different additives, having specific influences on the electrical and thermal behavior of the semiconductor material, mostly on their non-linear relation between the voltage applied and the current response as well as on their heat absorption capability. In literature there is no physical or mathematical model in order to assess the role of each dopant (additive) on the main characteristics. This is an experimental process which insures to the development of new semiconductor materials. This article will present a new manufacturing process (temperature and explain the influence of the sintering temperature on the electrical properties of two varsitor materials, with 2 and 5 additives.
{"title":"New manufacturing process for the metal oxide varistors used on low voltage surge-arresters","authors":"Adrian Paun, D. Vatau, F. Frigura-Iliasa, P. Andea, M. Frigura-Iliasa, F. Balcu","doi":"10.1109/EPE.2017.7967318","DOIUrl":"https://doi.org/10.1109/EPE.2017.7967318","url":null,"abstract":"The effective protection of each type of sensible electronic piece of equipment against any type of over voltage (including direct or indirect lightning applied on power supply) is a big issue for power system specialists. Some of the most reliable electronic devices used in order to protect against overvoltages are all voltage metal oxide varistor based surge-arresters. These varistors are produced starting from a thick mixture of different metal oxides, where the main component (more than 80–90% as mass percentage) is ZnO. New improvements for these devices could be performed only by taking in consideration their mass production process, by placing different additives, having specific influences on the electrical and thermal behavior of the semiconductor material, mostly on their non-linear relation between the voltage applied and the current response as well as on their heat absorption capability. In literature there is no physical or mathematical model in order to assess the role of each dopant (additive) on the main characteristics. This is an experimental process which insures to the development of new semiconductor materials. This article will present a new manufacturing process (temperature and explain the influence of the sintering temperature on the electrical properties of two varsitor materials, with 2 and 5 additives.","PeriodicalId":201464,"journal":{"name":"2017 18th International Scientific Conference on Electric Power Engineering (EPE)","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122594121","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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