Pub Date : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512078
Roman Bodnar, A. Otcenásová, M. Regula, Michal Repak
This paper discusses universal methodology for quantification of equipment trips due to voltage sags. Every sensitive equipment is described by the voltage-tolerance curve with specific limit values. Generally, one type of the sensitive equipment can be described by different characteristics that create an area of uncertainty, which influences the behavior of these devices. For calculation of expected number of equipment trips due to voltage sags are using various types of sensitivity equipment (e.g. personal computer, adjustable speed drive and programmable logic controller). The first general probability approach used probability density functions for bivariate random variable (magnitude and duration of the voltage sag) and the second cumulative probability approach used probability distribution functions for bivariate random variable. Moreover, the estimation of equipment trips is complemented with determining various levels of sensitivity, which is dependent on operating conditions.
{"title":"Methodology for quantification of equipment trips due to voltage sags","authors":"Roman Bodnar, A. Otcenásová, M. Regula, Michal Repak","doi":"10.1109/ELEKTRO.2016.7512078","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512078","url":null,"abstract":"This paper discusses universal methodology for quantification of equipment trips due to voltage sags. Every sensitive equipment is described by the voltage-tolerance curve with specific limit values. Generally, one type of the sensitive equipment can be described by different characteristics that create an area of uncertainty, which influences the behavior of these devices. For calculation of expected number of equipment trips due to voltage sags are using various types of sensitivity equipment (e.g. personal computer, adjustable speed drive and programmable logic controller). The first general probability approach used probability density functions for bivariate random variable (magnitude and duration of the voltage sag) and the second cumulative probability approach used probability distribution functions for bivariate random variable. Moreover, the estimation of equipment trips is complemented with determining various levels of sensitivity, which is dependent on operating conditions.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128877264","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 : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512083
S. Girshin, V. Goryunov, E. Kuznetsov, E. Petrova, D. Osipov
The problem of modeling electrical loads in the calculation of modes of electric networks with controllable arc extinguish reactor with asymmetry modes is considered. The model is based on the simplifying assumption of constant power load permitting the use of a minimum set of input data. The equations are obtained using methods of phase coordinates and symmetrical components. The model is a formula of nonlinear transformation of phase voltages in phase load currents with the double exception of zero sequence. It is shown that even with a significant bias of neutral conductor load currents using this model are almost symmetrical. The proposed model of the load can be used to calculate the normal net mode with arc extinguish reactor, as well as to calculate the single phase-to-earth fault modes.
{"title":"Simulation of electrical loads for the steady-state regime calculation of electric grids with arc extinguish reactor","authors":"S. Girshin, V. Goryunov, E. Kuznetsov, E. Petrova, D. Osipov","doi":"10.1109/ELEKTRO.2016.7512083","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512083","url":null,"abstract":"The problem of modeling electrical loads in the calculation of modes of electric networks with controllable arc extinguish reactor with asymmetry modes is considered. The model is based on the simplifying assumption of constant power load permitting the use of a minimum set of input data. The equations are obtained using methods of phase coordinates and symmetrical components. The model is a formula of nonlinear transformation of phase voltages in phase load currents with the double exception of zero sequence. It is shown that even with a significant bias of neutral conductor load currents using this model are almost symmetrical. The proposed model of the load can be used to calculate the normal net mode with arc extinguish reactor, as well as to calculate the single phase-to-earth fault modes.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126578518","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 : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512034
P. Groumpos
The challenging issues of modelling and controlling complex dynamic systems (CDS) are carefully considered and properly addressed. Qualitative description of most of the parameters of complex dynamic systems results inevitably in fuzziness, complexity and uncertainty. One of the challenges of accepting the operation of any complex dynamic system is the ability to make Decisions so the system runs efficiently and cost effectively. A short but useful historical overview of decision support systems (DSS) is given. The need for new conceptual and advanced models for addressing the challenging issues of CDS is provided. Fuzzy Cognitive Maps (FCMs) as a new modelling approach is briefly described. An illustrative example is provided along with some very interesting promising results.
{"title":"Conceptual modeling and decision making support systems for complex dynamical systems: A critical overview","authors":"P. Groumpos","doi":"10.1109/ELEKTRO.2016.7512034","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512034","url":null,"abstract":"The challenging issues of modelling and controlling complex dynamic systems (CDS) are carefully considered and properly addressed. Qualitative description of most of the parameters of complex dynamic systems results inevitably in fuzziness, complexity and uncertainty. One of the challenges of accepting the operation of any complex dynamic system is the ability to make Decisions so the system runs efficiently and cost effectively. A short but useful historical overview of decision support systems (DSS) is given. The need for new conceptual and advanced models for addressing the challenging issues of CDS is provided. Fuzzy Cognitive Maps (FCMs) as a new modelling approach is briefly described. An illustrative example is provided along with some very interesting promising results.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127807962","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 : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512148
Jana Bírešová, P. Hockicko
The sample of metaphosphate glass Ba(PO3)2 was investigated using the electrical conductivity measurements in the range of frequencies 10 Hz-2 MHz and over range of temperatures 643 K-750 K. The aim of this work is the investigation of effect BaO modifier to the structure of phosphate glass using dielectric relaxation spectroscopy which allows us study the fundamental properties of the investigated materials like ac conductivity, dc conductivity and electric modulus formalism. The temperature dependences of dc and ac conductivities were investigated in accordance with Jonscher's universal power law and experimental values of imaginary part of electric modulus were fitted by KWW function. The estimated values of activation energy for dc conduction and electric modulus are very close.
对偏磷酸盐玻璃Ba(PO3)2样品在10hz ~ 2mhz频率和643 K ~ 750k温度范围内的电导率进行了研究。本工作的目的是利用介电弛豫光谱研究BaO改性剂对磷酸盐玻璃结构的影响，从而研究所研究材料的交流电导率、直流电导率和电模量的基本性质。根据Jonscher的普适幂律研究了直流和交流电导率的温度关系，并用KWW函数拟合了电模量虚部的实验值。直流电导活化能和电模量的估计值非常接近。
{"title":"Effect of BaO modifier on the metaphosphate composition by means of conductivity and modulus representation","authors":"Jana Bírešová, P. Hockicko","doi":"10.1109/ELEKTRO.2016.7512148","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512148","url":null,"abstract":"The sample of metaphosphate glass Ba(PO3)2 was investigated using the electrical conductivity measurements in the range of frequencies 10 Hz-2 MHz and over range of temperatures 643 K-750 K. The aim of this work is the investigation of effect BaO modifier to the structure of phosphate glass using dielectric relaxation spectroscopy which allows us study the fundamental properties of the investigated materials like ac conductivity, dc conductivity and electric modulus formalism. The temperature dependences of dc and ac conductivities were investigated in accordance with Jonscher's universal power law and experimental values of imaginary part of electric modulus were fitted by KWW function. The estimated values of activation energy for dc conduction and electric modulus are very close.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127493829","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 : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512160
N. Zhuravleva, A. Reznik, D. Kiesewetter, Anna Tukacheva, E. Smirnova
The thermal aging of insulating paper in composition of paper-impregnated insulation was investigated. The mechanical properties of the paper before and after aging, as well as other parameters were measured, in particular, the tangent of dielectric loss angle and the relative light transmission transformer oil. The sorption capacity of some pulp and dielectrics was evaluated. The significant dependence of the type of cellulose paper on change of parameters of paper-impregnated insulation at aging was revealed.
{"title":"On the increasing of the sorption capacity and temperature resistance of cellulosic insulation dielectrics","authors":"N. Zhuravleva, A. Reznik, D. Kiesewetter, Anna Tukacheva, E. Smirnova","doi":"10.1109/ELEKTRO.2016.7512160","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512160","url":null,"abstract":"The thermal aging of insulating paper in composition of paper-impregnated insulation was investigated. The mechanical properties of the paper before and after aging, as well as other parameters were measured, in particular, the tangent of dielectric loss angle and the relative light transmission transformer oil. The sorption capacity of some pulp and dielectrics was evaluated. The significant dependence of the type of cellulose paper on change of parameters of paper-impregnated insulation at aging was revealed.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131246793","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 : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512067
A. Simonová, L. Hargaš, D. Koniar, Zuzana Loncová, M. Hrianka
Design of a control circuit consists in switching algorithm specification which is then implemented in the control system. Problem of specification of switching algorithm comes from the analysis of regulated system's behaviour in input switching mode. This paper presents the analysis of complete operation cycle for a regulated static system of second order.
{"title":"Mathematical analysis of complete operation cycle of a system with two-position controller","authors":"A. Simonová, L. Hargaš, D. Koniar, Zuzana Loncová, M. Hrianka","doi":"10.1109/ELEKTRO.2016.7512067","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512067","url":null,"abstract":"Design of a control circuit consists in switching algorithm specification which is then implemented in the control system. Problem of specification of switching algorithm comes from the analysis of regulated system's behaviour in input switching mode. This paper presents the analysis of complete operation cycle for a regulated static system of second order.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132361769","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 : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512144
M. Snajdarova, B. Babušiak, I. Cap
The EegStudio, the powerful tool for displaying, analyzing and processing of electroencephalogram (EEG) with user friendly graphical interface is described in this paper. The EegStudio provides highlight of specific frequency bands of brain, interactive signal filtration, analysis in time-frequency domain and topographic mapping of the brain activity. The brain mapping is used for visualization of brain activity over the scalp. This application allows amplitude, frequency, interhemispheric coherence and time delay brain mapping. The mapping of time delay in records with epileptic seizure can be used for localization of the epileptic focus.
{"title":"Interactive tool for analysis of EEG signal","authors":"M. Snajdarova, B. Babušiak, I. Cap","doi":"10.1109/ELEKTRO.2016.7512144","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512144","url":null,"abstract":"The EegStudio, the powerful tool for displaying, analyzing and processing of electroencephalogram (EEG) with user friendly graphical interface is described in this paper. The EegStudio provides highlight of specific frequency bands of brain, interactive signal filtration, analysis in time-frequency domain and topographic mapping of the brain activity. The brain mapping is used for visualization of brain activity over the scalp. This application allows amplitude, frequency, interhemispheric coherence and time delay brain mapping. The mapping of time delay in records with epileptic seizure can be used for localization of the epileptic focus.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128082217","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 : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512081
Dolinger Y. Stanislav, Lyutarevich G. Alexander, Osipov S. Dmitry, Plankov A. Alexander
The paper provides a review of existing Petersen Coil control systems. Phase and amplitude (extremal) methods are proposed as optimal methods for the preliminary tuning of compensation under normal operating conditions. Phase, frequency method is put forward for earth fault mode tuning. The combination of these methods is recommended to use in order to achieve high tuning accuracy. A novel method of identifying fault line for single phase grounding is presented, based on wavelet transform of transient zero sequence network's fault characteristics.
{"title":"Basic approaches to the implementation of Petersen Coil control system using wavelet denoising","authors":"Dolinger Y. Stanislav, Lyutarevich G. Alexander, Osipov S. Dmitry, Plankov A. Alexander","doi":"10.1109/ELEKTRO.2016.7512081","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512081","url":null,"abstract":"The paper provides a review of existing Petersen Coil control systems. Phase and amplitude (extremal) methods are proposed as optimal methods for the preliminary tuning of compensation under normal operating conditions. Phase, frequency method is put forward for earth fault mode tuning. The combination of these methods is recommended to use in order to achieve high tuning accuracy. A novel method of identifying fault line for single phase grounding is presented, based on wavelet transform of transient zero sequence network's fault characteristics.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128192976","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 : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512031
G. Cibira, M. Ďulík
This article brings new method how to evaluate and assess optical network links and finally, to find an optimal path. To test and prove introduced assumptions in the article, data transport theory is merged and implemented into a simulation models. Simulation models demonstrate a novel approach, optimizing existing optical links and computing optimal path to transfer data bulks. To process unambiguous input parameters relationships, fuzzy logic is employed to assess each link quality and utilization. To provide comprehensive evaluation, several parameters are taken into account.
{"title":"Fuzzy logic routing within international academic networks","authors":"G. Cibira, M. Ďulík","doi":"10.1109/ELEKTRO.2016.7512031","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512031","url":null,"abstract":"This article brings new method how to evaluate and assess optical network links and finally, to find an optimal path. To test and prove introduced assumptions in the article, data transport theory is merged and implemented into a simulation models. Simulation models demonstrate a novel approach, optimizing existing optical links and computing optimal path to transfer data bulks. To process unambiguous input parameters relationships, fuzzy logic is employed to assess each link quality and utilization. To provide comprehensive evaluation, several parameters are taken into account.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134542036","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 : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512151
M. Goraus, D. Pudiš
In this paper we present fabrication process of photonic crystal (PhC) and photonic quasicrystal (PQC) structures in thin photoresist layer on glass substrate. For fabrication, we used laser interference lithography in Mach-Zehnder configuration. One-dimensional (1D), two-dimensional (2D) PhC and PQC relief structures of period 1600 nm were prepared in photoresist layer with depth up to 1100 nm. Quality of the prepared structures was confirmed from confocal laser microscope analysis and also from diffraction measurements.
{"title":"PhC and PQC patterned by interference lithography in photoresist surface","authors":"M. Goraus, D. Pudiš","doi":"10.1109/ELEKTRO.2016.7512151","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512151","url":null,"abstract":"In this paper we present fabrication process of photonic crystal (PhC) and photonic quasicrystal (PQC) structures in thin photoresist layer on glass substrate. For fabrication, we used laser interference lithography in Mach-Zehnder configuration. One-dimensional (1D), two-dimensional (2D) PhC and PQC relief structures of period 1600 nm were prepared in photoresist layer with depth up to 1100 nm. Quality of the prepared structures was confirmed from confocal laser microscope analysis and also from diffraction measurements.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124333363","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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