Pub Date : 2017-05-01DOI: 10.1109/PEPQA.2017.7981664
Juan David Gomez, L. Gaitan, E. Trujillo
This article presents an application of the Particle Swarm Optimization (PSO) on the optimization of the power flow in a IEEE system with 30 nodes, which has some nodes with distributed generation. In first place, the mathematical model used for the optimization of the electricity generation costs. Afterwards, this model is applied in a case study with a IEEE system with 30 nodes. The results obtained through PSO are compared to other optimization methods, demonstrating that the cost and losses for the 30-node system are less than the values delivered by other methods. Then the same model is applied for the same power system with distributed generation in some of their nodes.
{"title":"Particle swarm optimization applied to economic dispatchs","authors":"Juan David Gomez, L. Gaitan, E. Trujillo","doi":"10.1109/PEPQA.2017.7981664","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981664","url":null,"abstract":"This article presents an application of the Particle Swarm Optimization (PSO) on the optimization of the power flow in a IEEE system with 30 nodes, which has some nodes with distributed generation. In first place, the mathematical model used for the optimization of the electricity generation costs. Afterwards, this model is applied in a case study with a IEEE system with 30 nodes. The results obtained through PSO are compared to other optimization methods, demonstrating that the cost and losses for the 30-node system are less than the values delivered by other methods. Then the same model is applied for the same power system with distributed generation in some of their nodes.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"99 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":"116943549","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/PEPQA.2017.7981676
T. Gomez, W. Hernandez, W. Martínez, C. Cortés
The interleaved boost converter with magnetic coupling is a recent DC-DC converter topology that has drawn attention for its reduced size and good voltage gain. However, for its proper functioning, a real converter has to be controlled to deal with the unavoidable imbalance of the currents. This paper compares two control techniques applied on an interleaved boost converter with magnetic coupling. Therefore, the characteristics of the selected converter, the average current control and predictive control techniques are presented. As a result, it was found that the average current controller has the characteristic of zero steady state error, in contrast, the predictive controller allows an error in the estimated variables which causes the output voltage not to be equal to the reference value. The predictive controller considers and uses the discontinuous mode of operation, but controller has a higher computational cost than the average current controller.
{"title":"Control techniques for interleaved DC/DC converters with magnetic coupling","authors":"T. Gomez, W. Hernandez, W. Martínez, C. Cortés","doi":"10.1109/PEPQA.2017.7981676","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981676","url":null,"abstract":"The interleaved boost converter with magnetic coupling is a recent DC-DC converter topology that has drawn attention for its reduced size and good voltage gain. However, for its proper functioning, a real converter has to be controlled to deal with the unavoidable imbalance of the currents. This paper compares two control techniques applied on an interleaved boost converter with magnetic coupling. Therefore, the characteristics of the selected converter, the average current control and predictive control techniques are presented. As a result, it was found that the average current controller has the characteristic of zero steady state error, in contrast, the predictive controller allows an error in the estimated variables which causes the output voltage not to be equal to the reference value. The predictive controller considers and uses the discontinuous mode of operation, but controller has a higher computational cost than the average current controller.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"17 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":"133626436","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/PEPQA.2017.7981658
Natalia Avendaño, David F. Celeita, Miguel E. Hernandez, G. Ramos
This paper describes the connection analysis between a wind farm with 21 MW capacity and an energy storage system with the electrical grid. The core of the study is focused on the voltage drop test in a wind farm according to IEC 61400-21 standard which is explained and analyzed. Moreover, the battery sizing and model is explained step by step; likewise, the converters model and control to correctly charge and discharge the battery. Finally, there is a power quality analysis between the connection of the designed battery and the grid.
{"title":"Impact analysis of wind turbine and battery energy storage connection in power systems","authors":"Natalia Avendaño, David F. Celeita, Miguel E. Hernandez, G. Ramos","doi":"10.1109/PEPQA.2017.7981658","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981658","url":null,"abstract":"This paper describes the connection analysis between a wind farm with 21 MW capacity and an energy storage system with the electrical grid. The core of the study is focused on the voltage drop test in a wind farm according to IEC 61400-21 standard which is explained and analyzed. Moreover, the battery sizing and model is explained step by step; likewise, the converters model and control to correctly charge and discharge the battery. Finally, there is a power quality analysis between the connection of the designed battery and the grid.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"12 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":"134565325","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/PEPQA.2017.7981641
J. Caicedo, A. Romero, H. Zini
Large-scale penetration of power electronic-based loads is a concern in modern distribution networks due to the increase in harmonic distortion. Harmonic analysis in frequency-domain is suitable to deal with this problem due to the high computational efficiency. This type of analysis relies on the accuracy of nonlinear load models. This paper presents the development of a coupled admittance matrix model, able to characterize the interaction between harmonic voltages and currents, for a single-phase rectifier. The model was obtained by carrying out simulations in Matlab/Simulink. The dependence of the admittances on the phase angles of the harmonic voltages is considered by means of the tensor representation of the matrix. Besides, the effect of the variation of voltage distortion magnitude is analyzed. One thousand cases with different voltage distortions were carried out to test the model. The validation is achieved by comparing the aforementioned results with the respective simulations in time-domain.
{"title":"Frequency domain modeling of nonlinear loads, considering harmonic interaction","authors":"J. Caicedo, A. Romero, H. Zini","doi":"10.1109/PEPQA.2017.7981641","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981641","url":null,"abstract":"Large-scale penetration of power electronic-based loads is a concern in modern distribution networks due to the increase in harmonic distortion. Harmonic analysis in frequency-domain is suitable to deal with this problem due to the high computational efficiency. This type of analysis relies on the accuracy of nonlinear load models. This paper presents the development of a coupled admittance matrix model, able to characterize the interaction between harmonic voltages and currents, for a single-phase rectifier. The model was obtained by carrying out simulations in Matlab/Simulink. The dependence of the admittances on the phase angles of the harmonic voltages is considered by means of the tensor representation of the matrix. Besides, the effect of the variation of voltage distortion magnitude is analyzed. One thousand cases with different voltage distortions were carried out to test the model. The validation is achieved by comparing the aforementioned results with the respective simulations in time-domain.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"7 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":"122705859","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/PEPQA.2017.7981689
R. Moreno
The characterization and proper simulation of PV systems is a requirement to carry on feasibility studies of distributed generation. The detailed simulation of PV arrays guarantees an efficient operation considering different conditions. This paper addresses the characterization of basic PV cells and also includes the construction of PV modules with enough details to obtain relevant information about the performance. This paper shows how the I-V curves are affected by the temperature and other parameters. The models used and characterized correspond to commercial panels of first generation modules used widely in projects.
{"title":"Detailed modelling and simulation of photovoltaic systems","authors":"R. Moreno","doi":"10.1109/PEPQA.2017.7981689","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981689","url":null,"abstract":"The characterization and proper simulation of PV systems is a requirement to carry on feasibility studies of distributed generation. The detailed simulation of PV arrays guarantees an efficient operation considering different conditions. This paper addresses the characterization of basic PV cells and also includes the construction of PV modules with enough details to obtain relevant information about the performance. This paper shows how the I-V curves are affected by the temperature and other parameters. The models used and characterized correspond to commercial panels of first generation modules used widely in projects.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"62 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":"115154873","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/PEPQA.2017.7981644
Vladimir Sousa, Hernán Hernández, E. Quispe, J. R. Gómez, P. R. Viego
This paper evaluates the harmonic distortion generated by PWM motor drives in an electrical industrial system of a wheat flour mill company. For this, a comparative study between two industrial circuits connected at the same point of common coupling with similar characteristics of load and transformers is presented. The difference is that one circuit has PWM motor drives and the other does not have them. In the study, a practical method based on the statistical characterization of the total harmonic distortion of voltage (THDV) and current (THDI), individual voltage distortion (IVD), individual current distortion (ICD) and K-Factor is applied. As result, it was observed that PWM motor drives generated harmonics voltage mainly of fifth and seventh order with values that exceed limits established by standards in both circuits. In the work is also demonstrated that in the analysis of harmonics is necessary to consider various parameters and not only one.
{"title":"Analysis of harmonic distortion generated by PWM motor drives","authors":"Vladimir Sousa, Hernán Hernández, E. Quispe, J. R. Gómez, P. R. Viego","doi":"10.1109/PEPQA.2017.7981644","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981644","url":null,"abstract":"This paper evaluates the harmonic distortion generated by PWM motor drives in an electrical industrial system of a wheat flour mill company. For this, a comparative study between two industrial circuits connected at the same point of common coupling with similar characteristics of load and transformers is presented. The difference is that one circuit has PWM motor drives and the other does not have them. In the study, a practical method based on the statistical characterization of the total harmonic distortion of voltage (THDV) and current (THDI), individual voltage distortion (IVD), individual current distortion (ICD) and K-Factor is applied. As result, it was observed that PWM motor drives generated harmonics voltage mainly of fifth and seventh order with values that exceed limits established by standards in both circuits. In the work is also demonstrated that in the analysis of harmonics is necessary to consider various parameters and not only one.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"29 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":"132111262","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/PEPQA.2017.7981634
S. Correa, F. G. A. Díaz, A. J. E. Eslava
In this work was used a methodology for the magnetic simulation of power transformers for 12-pulse rectifiers. For the magnetic simulation of transformers the software ANSYS Maxwell was used, while for the model of circuits the software ANSYS Simplorer was used. Parameters such as electric losses in active components due to harmonics were analyzed. In final part of this work a comparison is made between results in simplified conditions compared with the realistic operation conditions of transformer connected to a 12-pulse rectifier.
{"title":"Comparison of losses of a transformer for a 12 pulse rectifier using cosimulation and the procedure stablished in IEEE 57.110 standard","authors":"S. Correa, F. G. A. Díaz, A. J. E. Eslava","doi":"10.1109/PEPQA.2017.7981634","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981634","url":null,"abstract":"In this work was used a methodology for the magnetic simulation of power transformers for 12-pulse rectifiers. For the magnetic simulation of transformers the software ANSYS Maxwell was used, while for the model of circuits the software ANSYS Simplorer was used. Parameters such as electric losses in active components due to harmonics were analyzed. In final part of this work a comparison is made between results in simplified conditions compared with the realistic operation conditions of transformer connected to a 12-pulse rectifier.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"6 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":"127652415","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/PEPQA.2017.7981653
J. H. Estrada-Estrada, A. Ustariz-Farfán, E. Cano-Plata
Hydro-turbine maintenance would be made easier by measuring the multi-scale entropy of its sound and the magnetic waves produced. Currently used methods include parametric solid modeling, FEA analysis, CFD simulation, CAD design & drafting, PLC & SCADA programming, protections, engineering & testing, and power quality testing, among others. The purpose of this paper is to explore specific connections between hydropower and complexity science. Recent trends in the processing of multiscale entropy of the physical signs are parallel to the advances in mathematical chaos and fractal theory. The presentation of the basic equations of the theory of entropy and complexity are shown in this study, in order to process data generated by turbines and create new procedures to assess them. Electrical circuits dissipate energy and manipulate intelligence. This paper proposes to analyze them from the of entropy and complexity point of view. Electromagnetic signals generated by circuits, such as turbines, can be demodulated to gain useful information.
{"title":"Application of complexity theory to hydro-turbine maintenance","authors":"J. H. Estrada-Estrada, A. Ustariz-Farfán, E. Cano-Plata","doi":"10.1109/PEPQA.2017.7981653","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981653","url":null,"abstract":"Hydro-turbine maintenance would be made easier by measuring the multi-scale entropy of its sound and the magnetic waves produced. Currently used methods include parametric solid modeling, FEA analysis, CFD simulation, CAD design & drafting, PLC & SCADA programming, protections, engineering & testing, and power quality testing, among others. The purpose of this paper is to explore specific connections between hydropower and complexity science. Recent trends in the processing of multiscale entropy of the physical signs are parallel to the advances in mathematical chaos and fractal theory. The presentation of the basic equations of the theory of entropy and complexity are shown in this study, in order to process data generated by turbines and create new procedures to assess them. Electrical circuits dissipate energy and manipulate intelligence. This paper proposes to analyze them from the of entropy and complexity point of view. Electromagnetic signals generated by circuits, such as turbines, can be demodulated to gain useful information.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"25 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":"125726458","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/PEPQA.2017.7981667
J. Rengifo, H. Salazar, A. Bueno, J. Aller
This paper presents an experimental evaluation of the voltage unbalances effects in the efficiency of induction motors. In that sense, two distinct National Electrical Manufacturers Associations (NEMA) design were evaluated to seek the changes on their performance. The voltage unbalance was assessed using the Complex Voltage Unbalance Factor (CVUF). The experimental methodology consisted in a segregation losses approach to study the stator, core, friction, rotor, and stray-load losses clearly. First, a no-load test was carried out in both motors keeping constant the magnitude and the angle of CVUF. Next, a load test was accomplished ranging the mechanical load from 120% down to 30% of the nominal load using the same CVUF of the no-load test. Finally, according to the results of NEMA design B motor has the greatest losses increment because it was the most affected by the skin effect.
{"title":"Experimental evaluation of the voltage unbalance in the efficiency of induction motors","authors":"J. Rengifo, H. Salazar, A. Bueno, J. Aller","doi":"10.1109/PEPQA.2017.7981667","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981667","url":null,"abstract":"This paper presents an experimental evaluation of the voltage unbalances effects in the efficiency of induction motors. In that sense, two distinct National Electrical Manufacturers Associations (NEMA) design were evaluated to seek the changes on their performance. The voltage unbalance was assessed using the Complex Voltage Unbalance Factor (CVUF). The experimental methodology consisted in a segregation losses approach to study the stator, core, friction, rotor, and stray-load losses clearly. First, a no-load test was carried out in both motors keeping constant the magnitude and the angle of CVUF. Next, a load test was accomplished ranging the mechanical load from 120% down to 30% of the nominal load using the same CVUF of the no-load test. Finally, according to the results of NEMA design B motor has the greatest losses increment because it was the most affected by the skin effect.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"146 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":"122970710","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/PEPQA.2017.7981656
Sergio Pérez, Miguel Vivert, R. Díez, D. Patiño
This Paper presents two different control strategies for a grid tied Differential Cuk Inverter. It shows the operating principle of the converter, a classical PI controller and a nonlinear controller based on sliding surfaces. A detailed analysis of the dynamics of the inverter is performed that is used for the design of the controllers. The classical PI controller is designed, based on the small signal average model of the inverter, and for the sliding mode controller, the nonlinear system is approximated to a linear system with a disturbance. For testing and comparing the performance of the controllers, simulations are accomplished, with changes in the phase and amplitude of the reference current and the input voltage. The simulation shows results comparing the overshoot, the settling time and the steady-state error of the inverter.
{"title":"Modeling and control of a grid tied differential Cuk Inverter","authors":"Sergio Pérez, Miguel Vivert, R. Díez, D. Patiño","doi":"10.1109/PEPQA.2017.7981656","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981656","url":null,"abstract":"This Paper presents two different control strategies for a grid tied Differential Cuk Inverter. It shows the operating principle of the converter, a classical PI controller and a nonlinear controller based on sliding surfaces. A detailed analysis of the dynamics of the inverter is performed that is used for the design of the controllers. The classical PI controller is designed, based on the small signal average model of the inverter, and for the sliding mode controller, the nonlinear system is approximated to a linear system with a disturbance. For testing and comparing the performance of the controllers, simulations are accomplished, with changes in the phase and amplitude of the reference current and the input voltage. The simulation shows results comparing the overshoot, the settling time and the steady-state error of the inverter.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"15 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":"123625301","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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