Pub Date : 2016-06-01DOI: 10.1109/ISFEE.2016.7803228
M. Q. Duong, H. Nguyen, S. Leva, M. Mussetta, G. Sava, S. Costinas
This paper presents a complete simulator developed in Matlab™ for a photovoltaic (PV) module. The most important contributions of the paper is the use of single and double diode model to simulate a PV module. In the paper are also implemented numerical methods to provide more characteristic parameters that are not provided by the manufacturers such as Rs, Rp, Ipv, I01 and I02. The numerical methods are suitably implemented to face the nonlinear nature of I-V and P-V curves that are characteristics to PV output. The accuracy of the simulator using single and double diode models is verified by applying the data-sheet from manufacturers. Furthermore, the double-diode model simulation results performed in Matlab™ are analyzed in comparison with the experimental data of a real 310 Wp photovoltaic module unit. The paper also highlights the effects of different shunt and series resistances and how it operates in different temperature conditions and irradiation levels.
{"title":"Performance analysis of a 310Wp photovoltaic module based on single and double diode model","authors":"M. Q. Duong, H. Nguyen, S. Leva, M. Mussetta, G. Sava, S. Costinas","doi":"10.1109/ISFEE.2016.7803228","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803228","url":null,"abstract":"This paper presents a complete simulator developed in Matlab™ for a photovoltaic (PV) module. The most important contributions of the paper is the use of single and double diode model to simulate a PV module. In the paper are also implemented numerical methods to provide more characteristic parameters that are not provided by the manufacturers such as Rs, Rp, Ipv, I01 and I02. The numerical methods are suitably implemented to face the nonlinear nature of I-V and P-V curves that are characteristics to PV output. The accuracy of the simulator using single and double diode models is verified by applying the data-sheet from manufacturers. Furthermore, the double-diode model simulation results performed in Matlab™ are analyzed in comparison with the experimental data of a real 310 Wp photovoltaic module unit. The paper also highlights the effects of different shunt and series resistances and how it operates in different temperature conditions and irradiation levels.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132429591","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 : 2016-06-01DOI: 10.1109/ISFEE.2016.7803191
A. Korotkov, D. Morozov, J. Hauer
The paper presents eight transistors SRAM cell with improved noise (interferences) immunity. The effect is reached by use an additional bus to control the state of the cell trigger. The results of the simulations as well as experiments have been demonstrated. The following SRAM characteristics have been obtained SNM = 222 mV, WRM = 1017 mV, the cell discharge current is 114 uA. The test chip has been fabricated with parameters of 180 nm CMOS process of UMC.
{"title":"A two-input 8-transistor SRAM cell with enhanced noise immunity","authors":"A. Korotkov, D. Morozov, J. Hauer","doi":"10.1109/ISFEE.2016.7803191","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803191","url":null,"abstract":"The paper presents eight transistors SRAM cell with improved noise (interferences) immunity. The effect is reached by use an additional bus to control the state of the cell trigger. The results of the simulations as well as experiments have been demonstrated. The following SRAM characteristics have been obtained SNM = 222 mV, WRM = 1017 mV, the cell discharge current is 114 uA. The test chip has been fabricated with parameters of 180 nm CMOS process of UMC.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"442 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134213036","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 : 2016-06-01DOI: 10.1109/ISFEE.2016.7803232
G. Oprea, H. Andrei
The development of industrial and residential customers technologies and electric equipment affects the power quality parameters of distribution networks. When the supply voltage of distribution networks is distorted by nonlinear loads, then the equipment of customers draws non-sinusoidal currents from the network which can produce many technical problems. Thus, one of major research problem is to identify and characterize the technologies and equipment that pollute the networks. In this respect, the paper proposes a complex analysis of power quality parameters for real industrial consumer based on data acquisition system. Power quality parameters monitoring involves collecting and processing the voltage and current signals in different points of consumer power system. Each technological process of the factory is modeled by using Matlab procedures and the equipment that pollute are identified. The results are compared to the measured values and the errors are low. Finally are proposed actions in order to increase the power quality.
{"title":"Power quality analysis of industrial company based on data acquisition system, numerical algorithms and compensation results","authors":"G. Oprea, H. Andrei","doi":"10.1109/ISFEE.2016.7803232","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803232","url":null,"abstract":"The development of industrial and residential customers technologies and electric equipment affects the power quality parameters of distribution networks. When the supply voltage of distribution networks is distorted by nonlinear loads, then the equipment of customers draws non-sinusoidal currents from the network which can produce many technical problems. Thus, one of major research problem is to identify and characterize the technologies and equipment that pollute the networks. In this respect, the paper proposes a complex analysis of power quality parameters for real industrial consumer based on data acquisition system. Power quality parameters monitoring involves collecting and processing the voltage and current signals in different points of consumer power system. Each technological process of the factory is modeled by using Matlab procedures and the equipment that pollute are identified. The results are compared to the measured values and the errors are low. Finally are proposed actions in order to increase the power quality.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133908839","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 : 2016-06-01DOI: 10.1109/ISFEE.2016.7803225
N. Tahir, G. Brooker
The paper investigates the effects of using coax-to-microstrip line transition with different mounting techniques and coaxial line terminals for measuring the characteristics of microstrip antenna. The investigations reveal that the antenna return losses and magnitude of characteristic impedance are least effected by vertically mounted tab terminal coaxial line. However, all the coaxial lines shift the phase of the characteristic impedance which requires phase correction.
{"title":"Investigation of effects of coax-to-microstrip transition on planar harmonic tag antennas","authors":"N. Tahir, G. Brooker","doi":"10.1109/ISFEE.2016.7803225","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803225","url":null,"abstract":"The paper investigates the effects of using coax-to-microstrip line transition with different mounting techniques and coaxial line terminals for measuring the characteristics of microstrip antenna. The investigations reveal that the antenna return losses and magnitude of characteristic impedance are least effected by vertically mounted tab terminal coaxial line. However, all the coaxial lines shift the phase of the characteristic impedance which requires phase correction.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121842385","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 : 2016-06-01DOI: 10.1109/ISFEE.2016.7803182
Y. Hsieh, Y. Chiu, Wei-ting Wu
This paper aims to do researches upon the dynamic characteristics of loaded voltage of Li-ion batteries. Many cycles of discharging experiments are carried out under controlled ambient temperature and adjusted SOC, discharging current level to gather the dynamic varying voltage data. These data are employed to establish a novel battery model. This model is expected to be based on less parameters that would be functions of battery current and SOC. Experimental data is used to verify the accuracy of this model and the result is satisfactory.
{"title":"A third-order reaction li-ion battery model","authors":"Y. Hsieh, Y. Chiu, Wei-ting Wu","doi":"10.1109/ISFEE.2016.7803182","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803182","url":null,"abstract":"This paper aims to do researches upon the dynamic characteristics of loaded voltage of Li-ion batteries. Many cycles of discharging experiments are carried out under controlled ambient temperature and adjusted SOC, discharging current level to gather the dynamic varying voltage data. These data are employed to establish a novel battery model. This model is expected to be based on less parameters that would be functions of battery current and SOC. Experimental data is used to verify the accuracy of this model and the result is satisfactory.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"11 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116440665","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 : 2016-06-01DOI: 10.1109/ISFEE.2016.7803210
J. J. Mesas, L. Monjo, L. Sainz, J. Pedra
Voltage source converter (VSC) DC systems are a new and emerging technology. They offer advantages over AC systems but also pose concerns, such as transient fault currents. VSCs are not protected against very fast-transient overcurrent caused by DC cable faults. In order to design protection systems for prompt interruption and isolation of these faults, DC system behavior under fault conditions must be studied. This paper investigates two-level VSC DC system response to DC cable faults and provides analytical expressions for characterizing DC fault overcurrent and voltages and identifying main DC fault characteristics (i.e., type, distance and resistance). This study is a useful tool for further DC system protection design.
{"title":"Cable fault characterization in VSC DC systems","authors":"J. J. Mesas, L. Monjo, L. Sainz, J. Pedra","doi":"10.1109/ISFEE.2016.7803210","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803210","url":null,"abstract":"Voltage source converter (VSC) DC systems are a new and emerging technology. They offer advantages over AC systems but also pose concerns, such as transient fault currents. VSCs are not protected against very fast-transient overcurrent caused by DC cable faults. In order to design protection systems for prompt interruption and isolation of these faults, DC system behavior under fault conditions must be studied. This paper investigates two-level VSC DC system response to DC cable faults and provides analytical expressions for characterizing DC fault overcurrent and voltages and identifying main DC fault characteristics (i.e., type, distance and resistance). This study is a useful tool for further DC system protection design.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129551223","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 : 2016-06-01DOI: 10.1109/ISFEE.2016.7803224
N. Tahir, G. Brooker
The paper presents a waveguide-to-probe transition for testing millimeter wave band planar harmonic tag antennas. It discusses in detail the design and the tuning approach for developing the waveguide transition. The transition limits the radiation leakage and is easy to fabricate. However, it is narrow band and could not be used for testing multiple antennas simultaneously. The working of the transition is validated by measuring the return losses of 77 GHz planar harmonic antenna which are in good agreement with the simulated results.
{"title":"Millimeter wave band waveguide-to-probe transition for planar harmonic tag antennas","authors":"N. Tahir, G. Brooker","doi":"10.1109/ISFEE.2016.7803224","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803224","url":null,"abstract":"The paper presents a waveguide-to-probe transition for testing millimeter wave band planar harmonic tag antennas. It discusses in detail the design and the tuning approach for developing the waveguide transition. The transition limits the radiation leakage and is easy to fabricate. However, it is narrow band and could not be used for testing multiple antennas simultaneously. The working of the transition is validated by measuring the return losses of 77 GHz planar harmonic antenna which are in good agreement with the simulated results.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130889652","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 : 2016-06-01DOI: 10.1109/ISFEE.2016.7803161
S. Yildiz, A. Aksen, S. Yarman
In this paper, a new method is presented for multiband matching network design. Low pass to band pass (LP-BP) frequency transformation is incorporated with the parametric Real Frequency Technique (RFT) for creating multiband network functions. In the new parametric approach, the poles of a low pass type impedance function are optimized under LP-BP transformation, for multiband matching of complex terminations. The resultant matching network is realized with resonance sections yielding multiband transducer power gain (TPG) characteristic.
{"title":"Multiband matching network design via transformation based Real Frequency Approach","authors":"S. Yildiz, A. Aksen, S. Yarman","doi":"10.1109/ISFEE.2016.7803161","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803161","url":null,"abstract":"In this paper, a new method is presented for multiband matching network design. Low pass to band pass (LP-BP) frequency transformation is incorporated with the parametric Real Frequency Technique (RFT) for creating multiband network functions. In the new parametric approach, the poles of a low pass type impedance function are optimized under LP-BP transformation, for multiband matching of complex terminations. The resultant matching network is realized with resonance sections yielding multiband transducer power gain (TPG) characteristic.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125362225","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 : 2016-06-01DOI: 10.1109/ISFEE.2016.7803166
A. Ciobanu, F. Munteanu, C. Nemeş, D. Astanei
Following a previously presented availability model of wind considered as a self-repairable system, the authors developed a new one based on over two years of continuously wind state monitoring in a given location. The new aspects are related to short time wind perturbations defined by its speed variations outside the generic useful speed limits, to establish the correspondent availability model and to bring out how to immunize a wind aggregate to some kind of wind perturbations based on the mechanical time constant and on the similar methods used to immunize the electrical drives against voltage dips. A case study is also presented with a parametrical analysis and numerical results. The research was done using the facilities offered by new laboratory, LACARP - Laboratory for Applied Research and Prototype Design of the Power Engineering Department.
{"title":"Availability model of wind and solution to immunize the generators against short time perturbations","authors":"A. Ciobanu, F. Munteanu, C. Nemeş, D. Astanei","doi":"10.1109/ISFEE.2016.7803166","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803166","url":null,"abstract":"Following a previously presented availability model of wind considered as a self-repairable system, the authors developed a new one based on over two years of continuously wind state monitoring in a given location. The new aspects are related to short time wind perturbations defined by its speed variations outside the generic useful speed limits, to establish the correspondent availability model and to bring out how to immunize a wind aggregate to some kind of wind perturbations based on the mechanical time constant and on the similar methods used to immunize the electrical drives against voltage dips. A case study is also presented with a parametrical analysis and numerical results. The research was done using the facilities offered by new laboratory, LACARP - Laboratory for Applied Research and Prototype Design of the Power Engineering Department.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122449654","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 : 2016-06-01DOI: 10.1109/ISFEE.2016.7803215
K. Senthilkumar, K. Pirapaharan, G. Lakshmanan, P. Hoole, S. Hoole
Array antennas have a nonlinear, complex relationship between the antenna beams generated and the array input functions that generate the steerable beams. In this paper we demonstrate the use of a simple, computationally less intensive Perceptron Neural Network with non-linear sigmoid activation function to do the synthesis of the desired antenna beam. The single neuron is used, where its optimized weights will yield the beam shape required. This paper presents a successfully implemented Perceptron and discusses the error between the desired and Perceptron generated beams The successful beam control gives high accuracy in the maximum radiation direction of the desired beam, as well as optimization in the direction of null points. Moreover, a comparison between the array antenna beams obtained using the Perceptron Single Neuron Weight Optimization method (SNWOM) and the optimized beams obtained using the Least Mean Square (LMS) method, further demonstrates the reliability and accuracy of the Perceptron based beamformer. The tests were performed for two different desired antenna beams: one braod side beam and the other with the antenna radiating in four different desired directions. The Perceptron based antenna may be embedded in the Arduino microcontroller used. It is also shown why it is not possible to get a single beam, linear array antenna with the Perceptron based array reported herein.
{"title":"Accuracy of Perceptron based beamforming for embedded smart and MIMO antennas","authors":"K. Senthilkumar, K. Pirapaharan, G. Lakshmanan, P. Hoole, S. Hoole","doi":"10.1109/ISFEE.2016.7803215","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803215","url":null,"abstract":"Array antennas have a nonlinear, complex relationship between the antenna beams generated and the array input functions that generate the steerable beams. In this paper we demonstrate the use of a simple, computationally less intensive Perceptron Neural Network with non-linear sigmoid activation function to do the synthesis of the desired antenna beam. The single neuron is used, where its optimized weights will yield the beam shape required. This paper presents a successfully implemented Perceptron and discusses the error between the desired and Perceptron generated beams The successful beam control gives high accuracy in the maximum radiation direction of the desired beam, as well as optimization in the direction of null points. Moreover, a comparison between the array antenna beams obtained using the Perceptron Single Neuron Weight Optimization method (SNWOM) and the optimized beams obtained using the Least Mean Square (LMS) method, further demonstrates the reliability and accuracy of the Perceptron based beamformer. The tests were performed for two different desired antenna beams: one braod side beam and the other with the antenna radiating in four different desired directions. The Perceptron based antenna may be embedded in the Arduino microcontroller used. It is also shown why it is not possible to get a single beam, linear array antenna with the Perceptron based array reported herein.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122766263","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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