Pub Date : 2014-05-22DOI: 10.1109/OPTIM.2014.6851016
L. Tutelea, I. Boldea, S. Deaconu
The parameter identification of a dual three phase's stator winding induction machine is approached in this paper by the genetic optimal algorithm. The estimated parameter are: the voltage ratio between main and auxiliary winding, the main winding resistance and leakage reactance, the cage rotor resistance and reactance, the coupling leakage reactance between main and auxiliary winding, the magnetization non saturated reactance, equivalent iron loss resistance and mechanical losses including their variation with speed. The parameter are calculated from standard no load and short circuit test performed on both stator winding, by minimization the sum of squared errors between measured and computed currents, active power and reactive power in several points. The proposed method reduces the measurement error influence on the estimated parameters and for leakage inductances that slightly depend on the current could be also considered the best constant values approximation.
{"title":"Parameter optimal identification of dual three phase stator winding induction machine","authors":"L. Tutelea, I. Boldea, S. Deaconu","doi":"10.1109/OPTIM.2014.6851016","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6851016","url":null,"abstract":"The parameter identification of a dual three phase's stator winding induction machine is approached in this paper by the genetic optimal algorithm. The estimated parameter are: the voltage ratio between main and auxiliary winding, the main winding resistance and leakage reactance, the cage rotor resistance and reactance, the coupling leakage reactance between main and auxiliary winding, the magnetization non saturated reactance, equivalent iron loss resistance and mechanical losses including their variation with speed. The parameter are calculated from standard no load and short circuit test performed on both stator winding, by minimization the sum of squared errors between measured and computed currents, active power and reactive power in several points. The proposed method reduces the measurement error influence on the estimated parameters and for leakage inductances that slightly depend on the current could be also considered the best constant values approximation.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115144957","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 : 2014-05-22DOI: 10.1109/OPTIM.2014.6850987
A. Fratu, M. Fratu
In this paper, based on original idea, the authors propose a new strategy to robot programming using imitation paradigm. To program the desired motion sequence for the physical robot, one captures the motion reference paths from her virtual robot model and maps these to the joint settings of the physical robot. Motion imitation requires transfer of a dynamical signature of a movement of the virtual robot to the physical robot, i.e. the robots should be able to encode and reproduce a particular path as one with a specific velocity and/or an acceleration profile. Furthermore, the virtual robot must cover all possible contexts in which the physical robot will need to generate similar motions in unseen context.
{"title":"Imitation-based motion programming for robotic manipulators","authors":"A. Fratu, M. Fratu","doi":"10.1109/OPTIM.2014.6850987","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6850987","url":null,"abstract":"In this paper, based on original idea, the authors propose a new strategy to robot programming using imitation paradigm. To program the desired motion sequence for the physical robot, one captures the motion reference paths from her virtual robot model and maps these to the joint settings of the physical robot. Motion imitation requires transfer of a dynamical signature of a movement of the virtual robot to the physical robot, i.e. the robots should be able to encode and reproduce a particular path as one with a specific velocity and/or an acceleration profile. Furthermore, the virtual robot must cover all possible contexts in which the physical robot will need to generate similar motions in unseen context.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123718524","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 : 2014-05-22DOI: 10.1109/OPTIM.2014.6850889
O. Monnich, R. D. G. Daweke, H. Lehr
Energy harvesting systems converting kinetic energy to drive an electromagnetic generator either to power an electronic device directly or to charge a secondary battery may be used to substitute big size and heavy weight batteries of autonomous systems. The output voltage and current of the generator is mostly transient and discontinuous in nature and must be converted to a DC signal. This requires energy converters with small volume and low weight. We therefore present a novel topology for a claw-pole generator, which features an extremely compact design and high conversion efficiency. The design can be further miniaturized, still using conventional processes and technologies for manufacturing. In the development process analytical calculations applying reluctance network techniques were first carried out in order to determine the basic geometry of the magnetic circuit. A 3D-FE model was created to perform field calculations in order to optimize the alternator's output power. These investigations also allowed a substantial reduction of the cogging torque, which is typical for claw-pole machines. The 3D-FE model calculations are in good agreement with experimental results. However, it turned out that there is a high sensitivity of the cogging torque to geometrical variations of the claws. When extending the system to two electrical phases, the generator principle was applied to build a motor with a high torque density. In a comparison with the data of commercially available motors of similar size it turned out that this new machine is more than a match to them.
{"title":"Miniaturized claw-pole generators and motors with high power density","authors":"O. Monnich, R. D. G. Daweke, H. Lehr","doi":"10.1109/OPTIM.2014.6850889","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6850889","url":null,"abstract":"Energy harvesting systems converting kinetic energy to drive an electromagnetic generator either to power an electronic device directly or to charge a secondary battery may be used to substitute big size and heavy weight batteries of autonomous systems. The output voltage and current of the generator is mostly transient and discontinuous in nature and must be converted to a DC signal. This requires energy converters with small volume and low weight. We therefore present a novel topology for a claw-pole generator, which features an extremely compact design and high conversion efficiency. The design can be further miniaturized, still using conventional processes and technologies for manufacturing. In the development process analytical calculations applying reluctance network techniques were first carried out in order to determine the basic geometry of the magnetic circuit. A 3D-FE model was created to perform field calculations in order to optimize the alternator's output power. These investigations also allowed a substantial reduction of the cogging torque, which is typical for claw-pole machines. The 3D-FE model calculations are in good agreement with experimental results. However, it turned out that there is a high sensitivity of the cogging torque to geometrical variations of the claws. When extending the system to two electrical phases, the generator principle was applied to build a motor with a high torque density. In a comparison with the data of commercially available motors of similar size it turned out that this new machine is more than a match to them.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"360 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124267070","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 : 2014-05-22DOI: 10.1109/OPTIM.2014.6851004
S. Mischie
The paper presents the acoustic source localization in a 2D rectangular room by using the measured acoustic impulse response. Two cases are considered: a corner of a room and a corridor. In each case, a theoretical analysis based on image source model is presented. To identify the source position, until some ambiguities, a single acoustic impulse response is required. To overcome these ambiguities, two additional impulse responses are needed. The three impulse responses can be obtained in the same time or by sequential measurements, two at a time. Experimental results obtained by real measurements which prove the theoretical ideas are presented.
{"title":"On acoustic source localization in a reverberant environment based on image method","authors":"S. Mischie","doi":"10.1109/OPTIM.2014.6851004","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6851004","url":null,"abstract":"The paper presents the acoustic source localization in a 2D rectangular room by using the measured acoustic impulse response. Two cases are considered: a corner of a room and a corridor. In each case, a theoretical analysis based on image source model is presented. To identify the source position, until some ambiguities, a single acoustic impulse response is required. To overcome these ambiguities, two additional impulse responses are needed. The three impulse responses can be obtained in the same time or by sequential measurements, two at a time. Experimental results obtained by real measurements which prove the theoretical ideas are presented.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125827513","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 : 2014-05-22DOI: 10.1109/OPTIM.2014.6850905
C. Freitag, T. Leibfried
In this paper a hysteresis model for electrical steel based on a numerical Fourier expansion of the magnetic field as function of magnetic polarization and frequency is proposed. The model setup relies on measured data. A single sheet tester is used for gauging hysteresis curves from minor to major loops with a frequency range starting at 50 Hz up to 250 Hz. The polarization is controlled to be cosinusoidal, as required by the standard IEC 60404-3. Whereas the magnetic polarization has a cosine waveform the corresponding magnetic field has a non-sinusoidal waveform. As a matter of the non-linear dependence between polarization and field, all harmonics are part of the magnetic field. A Fourier analysis of the magnetic field delivers harmonics as summation of cosine and sine waves. Two relationships can be found: one between the amplitudes of these waves and the amplitude of the polarization and another between the amplitudes of these waves and the frequency of the polarization. They are described via cubic spline interpolation. With an interpolation for each harmonic, the magnetic field is created as a sum of cosine and sine functions. Measured and modeled hysteresis loops are compared. The error of the model is determined. Finally, a hysteresis model for electrical steel is developed which is able to calculate a magnetic field for arbitrary polarization amplitudes and frequencies. Measured and modeled hysteresis loops are compared. The error of the model is determined. Finally, a hysteresis model for electrical steel is developed which is able to calculate a magnetic field for arbitrary polarization amplitudes and frequencies.
{"title":"Advanced magnetic hysteresis model describing polarization and frequency dependence","authors":"C. Freitag, T. Leibfried","doi":"10.1109/OPTIM.2014.6850905","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6850905","url":null,"abstract":"In this paper a hysteresis model for electrical steel based on a numerical Fourier expansion of the magnetic field as function of magnetic polarization and frequency is proposed. The model setup relies on measured data. A single sheet tester is used for gauging hysteresis curves from minor to major loops with a frequency range starting at 50 Hz up to 250 Hz. The polarization is controlled to be cosinusoidal, as required by the standard IEC 60404-3. Whereas the magnetic polarization has a cosine waveform the corresponding magnetic field has a non-sinusoidal waveform. As a matter of the non-linear dependence between polarization and field, all harmonics are part of the magnetic field. A Fourier analysis of the magnetic field delivers harmonics as summation of cosine and sine waves. Two relationships can be found: one between the amplitudes of these waves and the amplitude of the polarization and another between the amplitudes of these waves and the frequency of the polarization. They are described via cubic spline interpolation. With an interpolation for each harmonic, the magnetic field is created as a sum of cosine and sine functions. Measured and modeled hysteresis loops are compared. The error of the model is determined. Finally, a hysteresis model for electrical steel is developed which is able to calculate a magnetic field for arbitrary polarization amplitudes and frequencies. Measured and modeled hysteresis loops are compared. The error of the model is determined. Finally, a hysteresis model for electrical steel is developed which is able to calculate a magnetic field for arbitrary polarization amplitudes and frequencies.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129872972","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 : 2014-05-22DOI: 10.1109/OPTIM.2014.6850949
R. Beres, Xiongfei Wang, F. Blaabjerg, C. Bak, Marco Liserre
In this paper two promising LCL based filter topologies are evaluated against the well-known LCL with a damping resistor. The filters are designed for high power applications where the frequency modulation index is relatively low. The first topology is the selective resonant LCL filter which aim is to minimize the damping losses by bypassing the resistor at the fundamental and switching frequencies while preserving high attenuation at higher frequencies. A new design procedure is proposed for the selective resonant LCL filter. The presence of multi-tuned traps in the second topology aims to decrease the total size of the filter reactive elements while meeting current harmonic standards. It is found that selective resonant LCL filter provide much lower damping losses compared to the LCL filter with simple resistor topology. Additionally, for the trap topology a minimum switching frequency is determined which ensure that reduction in size of the filter is possible. The theoretical analysis is demonstrated by frequency analysis and time domain simulations.
{"title":"Comparative analysis of the selective resonant LCL and LCL plus trap filters","authors":"R. Beres, Xiongfei Wang, F. Blaabjerg, C. Bak, Marco Liserre","doi":"10.1109/OPTIM.2014.6850949","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6850949","url":null,"abstract":"In this paper two promising LCL based filter topologies are evaluated against the well-known LCL with a damping resistor. The filters are designed for high power applications where the frequency modulation index is relatively low. The first topology is the selective resonant LCL filter which aim is to minimize the damping losses by bypassing the resistor at the fundamental and switching frequencies while preserving high attenuation at higher frequencies. A new design procedure is proposed for the selective resonant LCL filter. The presence of multi-tuned traps in the second topology aims to decrease the total size of the filter reactive elements while meeting current harmonic standards. It is found that selective resonant LCL filter provide much lower damping losses compared to the LCL filter with simple resistor topology. Additionally, for the trap topology a minimum switching frequency is determined which ensure that reduction in size of the filter is possible. The theoretical analysis is demonstrated by frequency analysis and time domain simulations.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130102591","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 : 2014-05-22DOI: 10.1109/OPTIM.2014.6850908
M. Iordache, L. Dumitriu, R. Voiculescu, D. Nicolae, N. Galan, S. Deleanu, D. Carpenter
This paper presents results regarding the influence of the magnetic core saturation on the steady state performances of the induction machine (IM). The assessment is done through simulations performed with an IM model developed with the use of state equations and modified nodal equations. When analyzing the induction motor operating at steady state, we've considered a modified version of the well-known Π (Steinmetz) per-phase equivalent circuit. In the modified circuit, the magnetizing inductance is considered as a current-controlled nonlinear inductor, while the rotor resistor as a time-variable resistor. For simulations we used two software packages: ENCAP (Electrical Nonlinear Circuit Analysis, which is based upon modified nodal equations) and SYSEG (Symbolic State Equation Generation, which is based upon state equations). The state equations can be integrated through an existing routine from MATLAB/Simulink package. The features of the above mentioned programs include the Fourier analysis capabilities, with the direct application to calculating the harmonics of every order present in the current and voltage waveforms. Following the computing of harmonic content, we assessed the steady state characteristics (power factor, efficiency, etc) of the induction motor.
{"title":"Saturated induction machine steady-state performance assessment through simulations","authors":"M. Iordache, L. Dumitriu, R. Voiculescu, D. Nicolae, N. Galan, S. Deleanu, D. Carpenter","doi":"10.1109/OPTIM.2014.6850908","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6850908","url":null,"abstract":"This paper presents results regarding the influence of the magnetic core saturation on the steady state performances of the induction machine (IM). The assessment is done through simulations performed with an IM model developed with the use of state equations and modified nodal equations. When analyzing the induction motor operating at steady state, we've considered a modified version of the well-known Π (Steinmetz) per-phase equivalent circuit. In the modified circuit, the magnetizing inductance is considered as a current-controlled nonlinear inductor, while the rotor resistor as a time-variable resistor. For simulations we used two software packages: ENCAP (Electrical Nonlinear Circuit Analysis, which is based upon modified nodal equations) and SYSEG (Symbolic State Equation Generation, which is based upon state equations). The state equations can be integrated through an existing routine from MATLAB/Simulink package. The features of the above mentioned programs include the Fourier analysis capabilities, with the direct application to calculating the harmonics of every order present in the current and voltage waveforms. Following the computing of harmonic content, we assessed the steady state characteristics (power factor, efficiency, etc) of the induction motor.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129666738","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 : 2014-05-22DOI: 10.1109/OPTIM.2014.6850914
L. Aciu, P. Ogrutan, G. Nicolae, C. Ursachi
Radon concentration measurements in air with an Electronic Radon Gas Monitor in a location close to the telecommunication antenna gave unacceptable values. This paper presents several sets of measurements of electric field at low and high frequency and Radon concentrations in studied location and at the reference location. The Radon concentration measurements were performed both with electronic devices and with the alpha track detectors. To determine susceptibility Radon detector, tests were carried out for galvanic and radiated disturbance coupling. Radiated Immunity tests were made in a TEM cell in the range 850MHz-900MHz, according to IEC 61000-4-6 in the frequency range 150kHz-80MHz. Tests revealed errors of measuring the concentration of Radon gas in the presence of disturbances.
{"title":"Errors in Electronic Radon Gas Monitors due to electromagnetic interferences","authors":"L. Aciu, P. Ogrutan, G. Nicolae, C. Ursachi","doi":"10.1109/OPTIM.2014.6850914","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6850914","url":null,"abstract":"Radon concentration measurements in air with an Electronic Radon Gas Monitor in a location close to the telecommunication antenna gave unacceptable values. This paper presents several sets of measurements of electric field at low and high frequency and Radon concentrations in studied location and at the reference location. The Radon concentration measurements were performed both with electronic devices and with the alpha track detectors. To determine susceptibility Radon detector, tests were carried out for galvanic and radiated disturbance coupling. Radiated Immunity tests were made in a TEM cell in the range 850MHz-900MHz, according to IEC 61000-4-6 in the frequency range 150kHz-80MHz. Tests revealed errors of measuring the concentration of Radon gas in the presence of disturbances.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124544624","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 : 2014-05-22DOI: 10.1109/OPTIM.2014.6850927
J. Antonino-Daviu, L. Dunai
This paper deepens into several issues derived from educational experiences lived in a Spanish University, while teaching an Electric Engineering-related subject - `Electrical Technology' - in a group that was primarily based on foreign students. This subject covers a wide range of aspects related to the components, conception and design of electrical industrial installations. The work compiles the different difficulties faced by the instructor during the teaching process in such group. These difficulties are mainly due to the differences in students' technical backgrounds, multi-cultural origin, diversity in the electric regulations of different countries and different importance of the subject for each individual. The paper proposes several education strategies to overcome some of these difficulties, namely: integration of ICTs in the teaching process, elaboration of multimedia didactic material, development of specific assessment systems and promotion of individual tutoring. Preliminary implantation of some of these actions has led to an improvement of the students' performance that is reflected through the higher attendance to the lectures, enhancement of the opinion towards the subject and increment in the grades obtained by the students.
{"title":"Teaching electrical and electronic engineering to multi-cultural groups","authors":"J. Antonino-Daviu, L. Dunai","doi":"10.1109/OPTIM.2014.6850927","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6850927","url":null,"abstract":"This paper deepens into several issues derived from educational experiences lived in a Spanish University, while teaching an Electric Engineering-related subject - `Electrical Technology' - in a group that was primarily based on foreign students. This subject covers a wide range of aspects related to the components, conception and design of electrical industrial installations. The work compiles the different difficulties faced by the instructor during the teaching process in such group. These difficulties are mainly due to the differences in students' technical backgrounds, multi-cultural origin, diversity in the electric regulations of different countries and different importance of the subject for each individual. The paper proposes several education strategies to overcome some of these difficulties, namely: integration of ICTs in the teaching process, elaboration of multimedia didactic material, development of specific assessment systems and promotion of individual tutoring. Preliminary implantation of some of these actions has led to an improvement of the students' performance that is reflected through the higher attendance to the lectures, enhancement of the opinion towards the subject and increment in the grades obtained by the students.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121640739","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 : 2014-05-22DOI: 10.1109/OPTIM.2014.6850995
Boruz Mircea Alexandru, M. Mihai, Ciontu Marian, Mircea Ion
This paper aims to develop and update the methodology for calculating the stress to which the internal insulation of power transformer is subjected during lightning impulse test. Power transformer internal isolation consists of insolating intervals of oil impregnated paper, transformer board and oil. In whole, the transformer's insulation must withstand the voltage testing levels prescribed by the standards. One of the methods for determining the internal stress of various parts of the power transformer's insulation is by using mathematical models.
{"title":"Calculation methods for lightning impulse voltage distribution in power transformers","authors":"Boruz Mircea Alexandru, M. Mihai, Ciontu Marian, Mircea Ion","doi":"10.1109/OPTIM.2014.6850995","DOIUrl":"https://doi.org/10.1109/OPTIM.2014.6850995","url":null,"abstract":"This paper aims to develop and update the methodology for calculating the stress to which the internal insulation of power transformer is subjected during lightning impulse test. Power transformer internal isolation consists of insolating intervals of oil impregnated paper, transformer board and oil. In whole, the transformer's insulation must withstand the voltage testing levels prescribed by the standards. One of the methods for determining the internal stress of various parts of the power transformer's insulation is by using mathematical models.","PeriodicalId":298237,"journal":{"name":"2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125963440","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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