Pub Date : 2017-05-01DOI: 10.1109/PEPQA.2017.7981681
Carlos-Andrés Cholo, J. Ruiz, J. Guacaneme
The following article shows the implementation of MPPT's using fuzzy logic and a conventional algorithm known as P&O, both are applied to a low power wind turbine and the performance of each one is compared. Firstly, a model of the wind speed must be made, as it directly affects the system, therefore the extraction of the maximum power. Secondly, a model of the wind turbine, which is divided into static model and aerodynamic model, with which the angular speed of system modifies the output obtained, thus allowing the equipment to function at optimum point. Finally, an integration of each model is performed, in order to test the algorithms and prove the correct operation of each controller.
{"title":"Evaluation of MPPT methods using fuzzy logic applied to a low power wind turbine","authors":"Carlos-Andrés Cholo, J. Ruiz, J. Guacaneme","doi":"10.1109/PEPQA.2017.7981681","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981681","url":null,"abstract":"The following article shows the implementation of MPPT's using fuzzy logic and a conventional algorithm known as P&O, both are applied to a low power wind turbine and the performance of each one is compared. Firstly, a model of the wind speed must be made, as it directly affects the system, therefore the extraction of the maximum power. Secondly, a model of the wind turbine, which is divided into static model and aerodynamic model, with which the angular speed of system modifies the output obtained, thus allowing the equipment to function at optimum point. Finally, an integration of each model is performed, in order to test the algorithms and prove the correct operation of each controller.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131910695","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.2017.7981661
Johan Sebastián Sánchez Choachi, Miguel Ángel Dávila Rojas, C. L. T. Rodríguez
This paper develops the design of a batteries charger. This charger works as power factor correction and delivers a DC voltage to the battery. To this, a bridgeless boost topology is used, this and the battery are modeled and then, an adaptive control strategy is developed. This have into account the battery changes to tune the controller and keep sinusoidal the input current and keep it in phase with the main. Furthermore, the output voltage is controlled to a constant value with a suitable ripple to charge the battery. The outcomes of the simulation of this development are presented, where the average total harmonic distortion and power factor were 4.78 % and 0.9877 respectively. Finally, the conclusions are presented.
{"title":"Adaptive control of a PFC batteries charger","authors":"Johan Sebastián Sánchez Choachi, Miguel Ángel Dávila Rojas, C. L. T. Rodríguez","doi":"10.1109/PEPQA.2017.7981661","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981661","url":null,"abstract":"This paper develops the design of a batteries charger. This charger works as power factor correction and delivers a DC voltage to the battery. To this, a bridgeless boost topology is used, this and the battery are modeled and then, an adaptive control strategy is developed. This have into account the battery changes to tune the controller and keep sinusoidal the input current and keep it in phase with the main. Furthermore, the output voltage is controlled to a constant value with a suitable ripple to charge the battery. The outcomes of the simulation of this development are presented, where the average total harmonic distortion and power factor were 4.78 % and 0.9877 respectively. Finally, the conclusions are presented.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128996331","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.2017.7981636
G. Ramos, M. Rios, D. Gomez, H. Palacios, L. A. Posada
Integration of wind power plant into power grids introduces power quality problems. The use of Doubly Fed Induction Generator into wind farm cause a distortion of the waveforms of voltage and current. The percentage of harmonic distortion is greater if the number of wind turbines is large. If the simulation model are not defined properly, the harmonic distortion result would be incorrect. For power quality studies, it is required that the model represent the wind turbine in a detail form. However, when the wind farm has a high power capacity, a detail simulation model exceed the computational capacity of the software. As an alternative solution, aggregation methodologies of wind turbines are considered. To determine the precision of the simulation, an analysis of detail and aggregate model is being made based on IEC Std. 61400-21: Measurement and assessment of power quality characteristics of grid connected wind turbines. The comparison shows that an aggregate model could represent properly the behavior of large-scale wind farm for power quality studies.
{"title":"Doubly fed induction generator model for power quality studies","authors":"G. Ramos, M. Rios, D. Gomez, H. Palacios, L. A. Posada","doi":"10.1109/PEPQA.2017.7981636","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981636","url":null,"abstract":"Integration of wind power plant into power grids introduces power quality problems. The use of Doubly Fed Induction Generator into wind farm cause a distortion of the waveforms of voltage and current. The percentage of harmonic distortion is greater if the number of wind turbines is large. If the simulation model are not defined properly, the harmonic distortion result would be incorrect. For power quality studies, it is required that the model represent the wind turbine in a detail form. However, when the wind farm has a high power capacity, a detail simulation model exceed the computational capacity of the software. As an alternative solution, aggregation methodologies of wind turbines are considered. To determine the precision of the simulation, an analysis of detail and aggregate model is being made based on IEC Std. 61400-21: Measurement and assessment of power quality characteristics of grid connected wind turbines. The comparison shows that an aggregate model could represent properly the behavior of large-scale wind farm for power quality studies.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"18 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":"129297867","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.2017.7981683
Frank A. Moreno Vera, Jhonatan D. Paucara Prado, Javier Moriano, C. G. P. Zuniga, Damian E. Sal y Rosas Celi
Micro-inverters usually are used to connect photovoltaic panels (PV) to the electricity grid. If the energy provided by the panel is not enough to satisfy the demands, the system becomes dependent exclusively of the grid. This constraint demands the use of a battery bank, therefore it is necessary to add a third port to the micro-inverter to connect this energy backup. In this paper, a two stage micro-inverter is proposed, the first stage is a DC/DC Triple Active Bridge (TAB) converter that integrates a back-up battery and works in soft switching; and the second stage is a Voltage Source Inverter (VSl) that operates in both grid-connected mode (GCM) and Stand Alone Mode (SAM). The grid-multimode operation controller developed detects the islanding fault and maintains the energy quality for a typical nonlinear load. Reliability and robustness of Uninterrupted Power Supplies (UPS) are increased by the proposed control.
{"title":"Bidirectional multiport microinverter and grid-multimode-operation control for a non-linear load","authors":"Frank A. Moreno Vera, Jhonatan D. Paucara Prado, Javier Moriano, C. G. P. Zuniga, Damian E. Sal y Rosas Celi","doi":"10.1109/PEPQA.2017.7981683","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981683","url":null,"abstract":"Micro-inverters usually are used to connect photovoltaic panels (PV) to the electricity grid. If the energy provided by the panel is not enough to satisfy the demands, the system becomes dependent exclusively of the grid. This constraint demands the use of a battery bank, therefore it is necessary to add a third port to the micro-inverter to connect this energy backup. In this paper, a two stage micro-inverter is proposed, the first stage is a DC/DC Triple Active Bridge (TAB) converter that integrates a back-up battery and works in soft switching; and the second stage is a Voltage Source Inverter (VSl) that operates in both grid-connected mode (GCM) and Stand Alone Mode (SAM). The grid-multimode operation controller developed detects the islanding fault and maintains the energy quality for a typical nonlinear load. Reliability and robustness of Uninterrupted Power Supplies (UPS) are increased by the proposed control.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115481221","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.2017.7981643
H. Espitia, Guzmán Díaz González, Susana Díaz
Distributed generation systems are a suitable alternative for the rational use of energy. One of important aspect in these systems corresponds to the modeling of the transmission system and its loads which are usually variable. Neuro-fuzzy systems are an alternative for modeling and control of complex systems, allowing the adaptability of their parameters using data. This article shows the modeling of a node in a distribution system considering in adaptive way the load variability during a time interval.
{"title":"Adaptive model for a variable load in a distribution network using a neuro-fuzzy system","authors":"H. Espitia, Guzmán Díaz González, Susana Díaz","doi":"10.1109/PEPQA.2017.7981643","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981643","url":null,"abstract":"Distributed generation systems are a suitable alternative for the rational use of energy. One of important aspect in these systems corresponds to the modeling of the transmission system and its loads which are usually variable. Neuro-fuzzy systems are an alternative for modeling and control of complex systems, allowing the adaptability of their parameters using data. This article shows the modeling of a node in a distribution system considering in adaptive way the load variability during a time interval.","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":"114105790","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.2017.7981646
Harsha V. Padullaparti, M. Lwin, S. Santoso
This paper proposes a method to determine optimal locations to deploy edge-of-grid low-voltage static var compensator (SVC) devices in large real-world distribution circuits. The SVC device operation, characteristics, and modeling are also discussed. The optimization problem formulation developed in this work has the objective of mitigating undervoltage violations in the circuit using the minimum number of SVCs while improving the traditional voltage regulation device operations and circuit losses. Undervoltage area criterion is used to identify effective candidate locations and the binary particle swarm optimization (BPSO) algorithm with quasi-static time series (QSTS) simulations are used to determine the optimal SVC locations. The results show that the proposed method is effective in identifying the optimal SVC locations in large distribution circuits.
{"title":"Optimal placement of edge-of-grid low-voltage SVCs in real-world distribution circuits","authors":"Harsha V. Padullaparti, M. Lwin, S. Santoso","doi":"10.1109/PEPQA.2017.7981646","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981646","url":null,"abstract":"This paper proposes a method to determine optimal locations to deploy edge-of-grid low-voltage static var compensator (SVC) devices in large real-world distribution circuits. The SVC device operation, characteristics, and modeling are also discussed. The optimization problem formulation developed in this work has the objective of mitigating undervoltage violations in the circuit using the minimum number of SVCs while improving the traditional voltage regulation device operations and circuit losses. Undervoltage area criterion is used to identify effective candidate locations and the binary particle swarm optimization (BPSO) algorithm with quasi-static time series (QSTS) simulations are used to determine the optimal SVC locations. The results show that the proposed method is effective in identifying the optimal SVC locations in large distribution circuits.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"49 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":"122775644","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.2017.7981680
Andres Asprilla, W. Martínez, L. Munoz, C. Cortés
In current automotive applications, novel and robust communication technologies have been used to optimize some features related to security, fuel consumption and user interface. However, the automotive communication protocols present two problems: 1. the connections between devices are very complex and their maintenance is difficult, and 2. most of the commercial devices, specialized to send data between devices, use proprietary software to perform operations inside the vehicle. In this work, a novel embedded platform was designed to measure and control the speed and torque of electric motors of a 200 kW electric vehicle. It is a versatile, modular and open-source design, which exchanges data with each motor using the CAN Bus protocol to control their speed. Also, the implementation and maintenance of the proposed platform becomes simpler. The proposed platform was built and tested with the devices that are used inside the car.
{"title":"Design of an embedded hardware for motor control of a high performance electric vehicle","authors":"Andres Asprilla, W. Martínez, L. Munoz, C. Cortés","doi":"10.1109/PEPQA.2017.7981680","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981680","url":null,"abstract":"In current automotive applications, novel and robust communication technologies have been used to optimize some features related to security, fuel consumption and user interface. However, the automotive communication protocols present two problems: 1. the connections between devices are very complex and their maintenance is difficult, and 2. most of the commercial devices, specialized to send data between devices, use proprietary software to perform operations inside the vehicle. In this work, a novel embedded platform was designed to measure and control the speed and torque of electric motors of a 200 kW electric vehicle. It is a versatile, modular and open-source design, which exchanges data with each motor using the CAN Bus protocol to control their speed. Also, the implementation and maintenance of the proposed platform becomes simpler. The proposed platform was built and tested with the devices that are used inside the car.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129923344","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.2017.7981691
A. Orjuela-Cañón, J. Hernández, Cristian Rodriguez Rivero
The behavior of the Photovoltaic Systems are based on solar radiation that focuses on the panels, thus the generation of energy depends on this resource. Planning of these systems makes that demanding energy can be interrupted due to variant radiation behavior. Very short term forecasting models can be useful to improve the available supplies. Present proposal allows a first approach for term shorter prediction of global solar irradiance. Linear and nonlinear models were compared to implement this forecasting. Results show that nonlinear models based on computational intelligence techniques provide better results with a simpler methodology to get the models.
{"title":"Very short term forecasting in global solar irradiance using linear and nonlinear models","authors":"A. Orjuela-Cañón, J. Hernández, Cristian Rodriguez Rivero","doi":"10.1109/PEPQA.2017.7981691","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981691","url":null,"abstract":"The behavior of the Photovoltaic Systems are based on solar radiation that focuses on the panels, thus the generation of energy depends on this resource. Planning of these systems makes that demanding energy can be interrupted due to variant radiation behavior. Very short term forecasting models can be useful to improve the available supplies. Present proposal allows a first approach for term shorter prediction of global solar irradiance. Linear and nonlinear models were compared to implement this forecasting. Results show that nonlinear models based on computational intelligence techniques provide better results with a simpler methodology to get the models.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131197090","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.2017.7981678
Oswaldo A. Arráez-Cancelliere, N. Muñoz-Galeano, J. López-Lezama
This paper presents a techno-economical comparison of micro-inverter and string inverter topologies for grid-tie residential photovoltaic system. Initially, these topologies are described, presenting their benefits and drawbacks. Then, a 5.1 kWp system is modeled as a case of study. Two scenarios are used to evaluate the performance of each topology: under shadowing and no-shadowing conditions. Results show that a lower Levelized Cost of Energy (LCOE) can be achieved using the micro-inverter topology than the LCOE of string inverter topology. The payback period in Colombia is around of 10–12 years being similar for both technologies.
{"title":"Performance and economical comparison between micro-inverter and string inverter in a 5, 1 kWp residential PV-system in Colombia","authors":"Oswaldo A. Arráez-Cancelliere, N. Muñoz-Galeano, J. López-Lezama","doi":"10.1109/PEPQA.2017.7981678","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981678","url":null,"abstract":"This paper presents a techno-economical comparison of micro-inverter and string inverter topologies for grid-tie residential photovoltaic system. Initially, these topologies are described, presenting their benefits and drawbacks. Then, a 5.1 kWp system is modeled as a case of study. Two scenarios are used to evaluate the performance of each topology: under shadowing and no-shadowing conditions. Results show that a lower Levelized Cost of Energy (LCOE) can be achieved using the micro-inverter topology than the LCOE of string inverter topology. The payback period in Colombia is around of 10–12 years being similar for both technologies.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"173 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":"133565543","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.2017.7981671
Juan Guavita, R. Díez, D. Patiño, F. Ruiz, G. Perilla
This paper presents a novel control strategy for isolated multilevel inverters. This converter has been chosen due to the autonomy of each full bridge. Other advantage is the feasibility of handling the power by cell when there are changes in the batteries state of charge (SOC). In order to take advantage of these benefits, a control strategy has been developed. The main goal of the proposed solution is to change the power produced by each inverter in function of SOC, guaranteeing a proper regulation of the overall power, without affecting the parameters of quality of the output voltage like harmonic distortion and amplitude. The designed solution was tested by power sources variations, finding the control strategy appropriate to accomplish the objective, to modify the power produced by each full bridge in function of SOC without changing overall power of the system and keeping the output voltage constant.
{"title":"Self-balancing control strategy for a battery based H-bridge multilevel inverter","authors":"Juan Guavita, R. Díez, D. Patiño, F. Ruiz, G. Perilla","doi":"10.1109/PEPQA.2017.7981671","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981671","url":null,"abstract":"This paper presents a novel control strategy for isolated multilevel inverters. This converter has been chosen due to the autonomy of each full bridge. Other advantage is the feasibility of handling the power by cell when there are changes in the batteries state of charge (SOC). In order to take advantage of these benefits, a control strategy has been developed. The main goal of the proposed solution is to change the power produced by each inverter in function of SOC, guaranteeing a proper regulation of the overall power, without affecting the parameters of quality of the output voltage like harmonic distortion and amplitude. The designed solution was tested by power sources variations, finding the control strategy appropriate to accomplish the objective, to modify the power produced by each full bridge in function of SOC without changing overall power of the system and keeping the output voltage constant.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130226053","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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