Pub Date : 2017-05-01DOI: 10.1109/PEPQA.2017.7981685
Miguel Romero-L, L. Gallego
The occurrence of different types of faults and connection of heavy loads could cause voltage sags in several busbars in distribution grids. In this paper a Susceptible-Infected (SI) epidemic model is proposed to assess the propagation of voltage sags in distribution systems. In the SI model, the infectious nodes are the bus-bars where faults or connection of big loads could occur. On the other hand, susceptible nodes are the bus-bars in which voltage sags could occur. Parameters that affect the voltage sags propagation as system topology and detection threshold are modeled using the concept of infection rate (β). + A directed graph representing the voltage sags propagation is calculated based on the values of β between every pair of nodes. Finally, the propagation is characterized in terms of fault impedance and nodes are classified using graph theory indexes.
{"title":"Analysis of voltage sags propagation in distribution grids using a SI epidemic model","authors":"Miguel Romero-L, L. Gallego","doi":"10.1109/PEPQA.2017.7981685","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981685","url":null,"abstract":"The occurrence of different types of faults and connection of heavy loads could cause voltage sags in several busbars in distribution grids. In this paper a Susceptible-Infected (SI) epidemic model is proposed to assess the propagation of voltage sags in distribution systems. In the SI model, the infectious nodes are the bus-bars where faults or connection of big loads could occur. On the other hand, susceptible nodes are the bus-bars in which voltage sags could occur. Parameters that affect the voltage sags propagation as system topology and detection threshold are modeled using the concept of infection rate (β). + A directed graph representing the voltage sags propagation is calculated based on the values of β between every pair of nodes. Finally, the propagation is characterized in terms of fault impedance and nodes are classified using graph theory indexes.","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":"121550270","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.2017.7981637
Julián Rolando Camargo López, Oscar David Flórez Cediel, Johann Alexander Hernández Mora
This paper describes the development a low-cost adjustable speed drive for three phase induction motor. The system consists of two modules, control, and power. The control module consists of an analog controller (relaxation oscillator) depending on the complexity of the application. For simple processes, resistance adjustment can change the motor speed as necessary. The power module is sized to capacity requirements and motor receiving the corresponding signal, being able to replace depending on the motor, and such Triacs or SCRs. Then, a linear response was obtained through the change of a resistor with low voltage and current THD. For this study, was used squirrel cage induction motor with 4-poles, 2-hp of nominal power and 208-V, 60-Hz.
{"title":"A low-cost adjustable speed drive for three phase induction motor","authors":"Julián Rolando Camargo López, Oscar David Flórez Cediel, Johann Alexander Hernández Mora","doi":"10.1109/PEPQA.2017.7981637","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981637","url":null,"abstract":"This paper describes the development a low-cost adjustable speed drive for three phase induction motor. The system consists of two modules, control, and power. The control module consists of an analog controller (relaxation oscillator) depending on the complexity of the application. For simple processes, resistance adjustment can change the motor speed as necessary. The power module is sized to capacity requirements and motor receiving the corresponding signal, being able to replace depending on the motor, and such Triacs or SCRs. Then, a linear response was obtained through the change of a resistor with low voltage and current THD. For this study, was used squirrel cage induction motor with 4-poles, 2-hp of nominal power and 208-V, 60-Hz.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"40 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":"116194225","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.2017.7981679
L. Corredor, Miguel E. Hernandez, G. Ramos, J. R. Camarillo
There are multiple situations in which the amount of harmonic content data represents a challenge to obtain pertinent diagnosis on the long-term operation of the grid. However, descriptive statistics can be applied to big data sets of power quality measurements to enhance the situation awareness of complex power systems. This paper presents a methodology that allows operators to synthesize large amounts of power quality data. The approach is intended to be applied based on information collected by a fault recorder module at the electrical substation. With big data analysis techniques, the proposed methodology allows users to extract information and analyze two proposed indicators to alert the utility operator about critical conditions of harmonic content. The methodology is applied to a case study where millions of real power quality records were analyzed to show evidence about certain transmission system performance.
{"title":"Harmonic distortion assessment and visualization for power transmission systems","authors":"L. Corredor, Miguel E. Hernandez, G. Ramos, J. R. Camarillo","doi":"10.1109/PEPQA.2017.7981679","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981679","url":null,"abstract":"There are multiple situations in which the amount of harmonic content data represents a challenge to obtain pertinent diagnosis on the long-term operation of the grid. However, descriptive statistics can be applied to big data sets of power quality measurements to enhance the situation awareness of complex power systems. This paper presents a methodology that allows operators to synthesize large amounts of power quality data. The approach is intended to be applied based on information collected by a fault recorder module at the electrical substation. With big data analysis techniques, the proposed methodology allows users to extract information and analyze two proposed indicators to alert the utility operator about critical conditions of harmonic content. The methodology is applied to a case study where millions of real power quality records were analyzed to show evidence about certain transmission system performance.","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":"128796919","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.2017.7981645
Rafael Augusto Núñez Rodríguez, O. Ardila
This paper presents a robust QFT controller for position control of a DC motor with brushes from performance specifications such as robust stability, rejection of load disturbances in the motor shaft and reference tracking. The controller was implemented in the DSP TMS320F28335 which quantified the logic proposed by the robust control to generate a PWM signal as a function of the control action, which is applied by means of a bridge driver H type N-channel MOSFET from 31A to 30V DC. The proposed two degrees of freedom scheme showed a robust behavior of the position of the DC motor shaft in the case of changes in load on the shaft, variation of parameters according to the point of operation of the motor, and reference tracking. The RTDX communication protocol was used to acquire real-time information from the process.
{"title":"Robust control QFT position for brushed DC motor","authors":"Rafael Augusto Núñez Rodríguez, O. Ardila","doi":"10.1109/PEPQA.2017.7981645","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981645","url":null,"abstract":"This paper presents a robust QFT controller for position control of a DC motor with brushes from performance specifications such as robust stability, rejection of load disturbances in the motor shaft and reference tracking. The controller was implemented in the DSP TMS320F28335 which quantified the logic proposed by the robust control to generate a PWM signal as a function of the control action, which is applied by means of a bridge driver H type N-channel MOSFET from 31A to 30V DC. The proposed two degrees of freedom scheme showed a robust behavior of the position of the DC motor shaft in the case of changes in load on the shaft, variation of parameters according to the point of operation of the motor, and reference tracking. The RTDX communication protocol was used to acquire real-time information from the process.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"27 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":"133361965","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.2017.7981654
F. Osorio, Diego F. Motta, Maria A. Mantilla, J. G. Barrero, J. Petit
This paper presents the operation of a grid-tied photovoltaic power generator considering a two stages configuration for active power injection. A Neutral Point Clamped Inverter (NPC Inverter) was used for the DC-AC conversion and a DC-DC Boost converter complemented the system configuration. The control system includes the following loops: a maximum power point tracking algorithm, a DC bus voltage control, a reference generator, a capacitors voltage balancing loop, a current controller and a Level Shifted Pulse Width Modulation (LS-PWM) technique. The work is mainly focused in balancing the voltages in the DC bus capacitors by adding an offset level to the modulation signal which ensures the good performance of the NPC inverter. The operation of the system was evaluated in a PSIM® software environment for different irradiance conditions. The results show the outstanding performance of the photovoltaic system specifically in the Maximum Power Point Tracking (MPPT), the DC side voltages balance in the NPC inverter and the active power control.
{"title":"Control of grid-tied photovoltaic systems with neutral point clamped inverters","authors":"F. Osorio, Diego F. Motta, Maria A. Mantilla, J. G. Barrero, J. Petit","doi":"10.1109/PEPQA.2017.7981654","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981654","url":null,"abstract":"This paper presents the operation of a grid-tied photovoltaic power generator considering a two stages configuration for active power injection. A Neutral Point Clamped Inverter (NPC Inverter) was used for the DC-AC conversion and a DC-DC Boost converter complemented the system configuration. The control system includes the following loops: a maximum power point tracking algorithm, a DC bus voltage control, a reference generator, a capacitors voltage balancing loop, a current controller and a Level Shifted Pulse Width Modulation (LS-PWM) technique. The work is mainly focused in balancing the voltages in the DC bus capacitors by adding an offset level to the modulation signal which ensures the good performance of the NPC inverter. The operation of the system was evaluated in a PSIM® software environment for different irradiance conditions. The results show the outstanding performance of the photovoltaic system specifically in the Maximum Power Point Tracking (MPPT), the DC side voltages balance in the NPC inverter and the active power control.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"145 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":"131054482","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.2017.7981648
Luis David Pabon Fernandez, J. L. Díaz Rodríguez, Javier Gelvez Carvajal
This paper presents an experimental study of the relationship between performance and total harmonic distortion (THD) in cascaded H-bridges multilevel power converters. The aim of the study is to determine the existence of a relation between the decrease of the output voltage THD and the reduction of the converter performance. In the work, a three-phase H-bridge cascaded multilevel converter is implemented with nine stages per phase, using multiple PWM modulations with optimized harmonic content, which present different values of harmonic distortion. In this converter the performance and total harmonic distortion at the output voltage waveform for each of the modulations was analyzed and set the performance vs. THD.
{"title":"Efficiency-THD ratio in three-phase cascaded multilevel power converters of single DC source","authors":"Luis David Pabon Fernandez, J. L. Díaz Rodríguez, Javier Gelvez Carvajal","doi":"10.1109/PEPQA.2017.7981648","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981648","url":null,"abstract":"This paper presents an experimental study of the relationship between performance and total harmonic distortion (THD) in cascaded H-bridges multilevel power converters. The aim of the study is to determine the existence of a relation between the decrease of the output voltage THD and the reduction of the converter performance. In the work, a three-phase H-bridge cascaded multilevel converter is implemented with nine stages per phase, using multiple PWM modulations with optimized harmonic content, which present different values of harmonic distortion. In this converter the performance and total harmonic distortion at the output voltage waveform for each of the modulations was analyzed and set the performance vs. THD.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"31 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":"115843467","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.2017.7981642
Pablo César Rodríguez Gómez, Jessica Lozano Flamang, Javier A. Guacaneme Moreno
This paper presents an electronic type wind emulator implementation as a power source based on the Nordex N60 Wind Turbine power curve, working on a 1000 to 1 power scale. This emulator is based on a power control using Park transform and its processing algorithm is performed in the Tiva C TM4C1294 development kit, which generates the three-phase inverter switching signals using the SPWM technique. To obtain the experimental results, the emulator behavior is verified in four power curve points, showing a better performance as the generated power increases.
本文介绍了一种基于Nordex N60风力发电机功率曲线的电子式风力模拟器作为电源的实现，工作在1000比1的功率比例下。该仿真器基于Park变换的功率控制，其处理算法在Tiva C TM4C1294开发套件中完成，利用SPWM技术产生三相逆变器开关信号。为了得到实验结果，仿真器在4个功率曲线点上进行了性能验证，随着功率的增加，仿真器的性能越来越好。
{"title":"Wind turbine electronic emulator using park transform for power control","authors":"Pablo César Rodríguez Gómez, Jessica Lozano Flamang, Javier A. Guacaneme Moreno","doi":"10.1109/PEPQA.2017.7981642","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981642","url":null,"abstract":"This paper presents an electronic type wind emulator implementation as a power source based on the Nordex N60 Wind Turbine power curve, working on a 1000 to 1 power scale. This emulator is based on a power control using Park transform and its processing algorithm is performed in the Tiva C TM4C1294 development kit, which generates the three-phase inverter switching signals using the SPWM technique. To obtain the experimental results, the emulator behavior is verified in four power curve points, showing a better performance as the generated power increases.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"9 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":"122413458","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.2017.7981657
José J. Chacón, R. A. Ortiz, John E. Archila, Maria A. Mantilla, M. Botero, J. Petit
This paper presents the design and implementation of a prototype based on a SEPIC (Single-Ended Primary Inductance Converter) used to measure the characteristic curves of photovoltaic (PV) panels. The SEPIC is controlled to emulate a variable resistance at the output of the PV panel in order to obtain a set of values (voltages and currents) for different operating points at the output of the panel. The set of voltages and currents are stored and sent to a computer in order to display the characteristic curves in real-time. The performance of the prototype is firstly evaluated though simulations in PSIM and subsequently by experimental results. The results show the outstanding performance of the SEPIC converter and its suitable use for this kind of applications due to its low input current ripple and its operation as a buck-boost converter. The resulting prototype allows the characterization of PV panels up to 500 W.
{"title":"Prototype for the characterization of photovoltaic panels based on a SEPIC converter","authors":"José J. Chacón, R. A. Ortiz, John E. Archila, Maria A. Mantilla, M. Botero, J. Petit","doi":"10.1109/PEPQA.2017.7981657","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981657","url":null,"abstract":"This paper presents the design and implementation of a prototype based on a SEPIC (Single-Ended Primary Inductance Converter) used to measure the characteristic curves of photovoltaic (PV) panels. The SEPIC is controlled to emulate a variable resistance at the output of the PV panel in order to obtain a set of values (voltages and currents) for different operating points at the output of the panel. The set of voltages and currents are stored and sent to a computer in order to display the characteristic curves in real-time. The performance of the prototype is firstly evaluated though simulations in PSIM and subsequently by experimental results. The results show the outstanding performance of the SEPIC converter and its suitable use for this kind of applications due to its low input current ripple and its operation as a buck-boost converter. The resulting prototype allows the characterization of PV panels up to 500 W.","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":"116448574","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.2017.7981686
G. Ramos, Ángela Espín-Delgado, J. Camarillo-Peñaranda
A study of the impact of the means of grounding on the voltage sag and swell characterization is presented in this paper. Only temporary overvoltages and undervoltages caused by faults are considered. The voltage divider model is employed, and the symmetrical components are used to obtain the phasor voltages at the point of common coupling as functions of the means of grounding of the system and the distance between the point of common coupling and the fault location. A computational tool that shows the phasor behavior during a fault event is developed. Also, a zone classification is proposed based on the location of voltage vectors depending on the fault type. This zone classification may be a cornerstone for new methods of fault classification and location in future works.
{"title":"Behavior of phase voltages due to faults in radial power systems: An educational tool","authors":"G. Ramos, Ángela Espín-Delgado, J. Camarillo-Peñaranda","doi":"10.1109/PEPQA.2017.7981686","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981686","url":null,"abstract":"A study of the impact of the means of grounding on the voltage sag and swell characterization is presented in this paper. Only temporary overvoltages and undervoltages caused by faults are considered. The voltage divider model is employed, and the symmetrical components are used to obtain the phasor voltages at the point of common coupling as functions of the means of grounding of the system and the distance between the point of common coupling and the fault location. A computational tool that shows the phasor behavior during a fault event is developed. Also, a zone classification is proposed based on the location of voltage vectors depending on the fault type. This zone classification may be a cornerstone for new methods of fault classification and location in future works.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"71 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":"127642611","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.2017.7981655
Andrés Julián Aristizábal Cardona, Carlos Arturo Páez Chica
This article describes the power quality analysis realized over a 6 kW photovoltaic system interconnected with the electrical grid of a laboratories building. That building is the engineering programs' investigation center of the Universidad de Bogotá Jorge Tadeo Lozano. A monitoring system was implemented through virtual instrumentation to acquire solar radiation, ambient temperature and electrical variables of the photovoltaic system. The analysis was applied on 2016 and the standard guidelines of IEEE 929-2000 were followed. The results show that power quality parameters: frequency, nominal voltage, total harmonic distortion of voltage and flicker satisfy the standard limits; but power factor does not satisfy the 0.85 value demanded as consequence of the building non-linear loads.
本文描述了在与实验室建筑电网互联的6kw光伏系统上实现的电能质量分析。这座建筑是波哥大大学(universsidad de bogotjorge Tadeo Lozano)工程项目的调查中心。通过虚拟仪器实现了光伏系统的太阳辐射、环境温度和电变量的监测系统。该分析应用于2016年，并遵循IEEE 929-2000的标准指南。结果表明:电能质量参数:频率、标称电压、电压总谐波失真和闪变满足标准限值;但由于建筑物的非线性负荷，功率因数不能满足0.85的要求。
{"title":"Power quality analysis of a 6 kW photovoltaic system interconnected with the distribution grid of a laboratories building","authors":"Andrés Julián Aristizábal Cardona, Carlos Arturo Páez Chica","doi":"10.1109/PEPQA.2017.7981655","DOIUrl":"https://doi.org/10.1109/PEPQA.2017.7981655","url":null,"abstract":"This article describes the power quality analysis realized over a 6 kW photovoltaic system interconnected with the electrical grid of a laboratories building. That building is the engineering programs' investigation center of the Universidad de Bogotá Jorge Tadeo Lozano. A monitoring system was implemented through virtual instrumentation to acquire solar radiation, ambient temperature and electrical variables of the photovoltaic system. The analysis was applied on 2016 and the standard guidelines of IEEE 929-2000 were followed. The results show that power quality parameters: frequency, nominal voltage, total harmonic distortion of voltage and flicker satisfy the standard limits; but power factor does not satisfy the 0.85 value demanded as consequence of the building non-linear loads.","PeriodicalId":256426,"journal":{"name":"2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA)","volume":"270 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":"115209664","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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