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Implementation of a high frequency PWM signal in FPGA FOR GaN power devices switching 在FPGA中实现用于GaN功率器件开关的高频PWM信号
2017 Brazilian Power Electronics Conference (COBEP) Pub Date : 2017-11-01 DOI: 10.1109/COBEP.2017.8257309
G. M. Tavares, M. Salmento, W. J. Paula, D. C. Pereira, H. Braga
{"title":"Implementation of a high frequency PWM signal in FPGA FOR GaN power devices switching","authors":"G. M. Tavares, M. Salmento, W. J. Paula, D. C. Pereira, H. Braga","doi":"10.1109/COBEP.2017.8257309","DOIUrl":"https://doi.org/10.1109/COBEP.2017.8257309","url":null,"abstract":"This paper describes a FPGA-based (Field Programmable Gate Array) high-frequency signal generation platform, which aims to drive GaN (Gallium nitride) power semiconductor devices. FPGA is a digital platform that operates at frequency levels up to GHz. Thus, it can be an interesting solution to driving GaN devices that operate on typical frequencies of 1 to 10 MHz. A brief review on the FPGA platform and the description of the implementation of Pulse-Width Modulation (PWM) signals at frequencies up to 2 MHz are presented. Experimental results have shown that it is possible to obtain a duty cycle in the range from 1 to 99% with a resolution of 0.67%. Additionally, concerning the PWM period, the phase can be defined in the range from 1 to 360 degrees with a resolution of 2.4 degrees. Finally, some power applications that benefits by using GaN devices at high frequencies are shown.","PeriodicalId":375493,"journal":{"name":"2017 Brazilian Power Electronics Conference (COBEP)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122129284","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}
引用次数: 2
Generalized predictive control with harmonic rejection applied to a grid-connected inverter with LCL filter 带LCL滤波器并网逆变器的谐波抑制广义预测控制
2017 Brazilian Power Electronics Conference (COBEP) Pub Date : 2017-11-01 DOI: 10.1109/COBEP.2017.8257372
Daniel Martins Lima, V. Montagner, L. Maccari
{"title":"Generalized predictive control with harmonic rejection applied to a grid-connected inverter with LCL filter","authors":"Daniel Martins Lima, V. Montagner, L. Maccari","doi":"10.1109/COBEP.2017.8257372","DOIUrl":"https://doi.org/10.1109/COBEP.2017.8257372","url":null,"abstract":"This paper provides the design of a Model Predictive Controller (MPC) using the Generalized Predictive Control (GPC) algorithm applied to grid-connected inverters with LCL filter. The main objective is to obtain a current controller that ensures reference tracking capacity for sinusoidal references and rejection of specific harmonic disturbances produced by grid voltages. The closed-loop system with the GPC controller is evaluated through time and frequency response analysis.","PeriodicalId":375493,"journal":{"name":"2017 Brazilian Power Electronics Conference (COBEP)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122602846","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}
引用次数: 3
Comparative analysis of basic single-stage non-isolated AC-DC topologies employed as high-current COB LED drivers 用于大电流COB LED驱动器的基本单级非隔离交流-直流拓扑的比较分析
2017 Brazilian Power Electronics Conference (COBEP) Pub Date : 2017-11-01 DOI: 10.1109/COBEP.2017.8257266
D. C. Pereira, W. D. de Paula, P. L. Tavares, H. Braga, F. L. Tofoli
{"title":"Comparative analysis of basic single-stage non-isolated AC-DC topologies employed as high-current COB LED drivers","authors":"D. C. Pereira, W. D. de Paula, P. L. Tavares, H. Braga, F. L. Tofoli","doi":"10.1109/COBEP.2017.8257266","DOIUrl":"https://doi.org/10.1109/COBEP.2017.8257266","url":null,"abstract":"This work presents a comparative study comprising the traditional single-stage buck and buck-boost rectifiers used as high-current COB (chip-onboard) LED (light emitting diode) drivers. The structures are designed both in continuous conduction mode (CCM) and discontinuous conduction mode (DCM) in order to analyze the existing stresses in the semiconductors and overall efficiency. For this purpose, a high-current COB LED is used while driven by the aforementioned single-stage non-isolated topologies. The drivers are supposed to present essential features when dealing with outdoor floodlighting e.g. high power factor and low harmonic distortion of the input current. Besides, simulation tests are performed using real intrinsic parasitic parameters of commercially available semiconductors. Finally, the results are properly discussed to evaluate the restrictions of these basic non-isolated high-current COB drivers.","PeriodicalId":375493,"journal":{"name":"2017 Brazilian Power Electronics Conference (COBEP)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125711963","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}
引用次数: 3
Maximum power point tracking of a wind generator using a SEPIC converter with LMI control 使用带有LMI控制的SEPIC变换器的风力发电机最大功率点跟踪
2017 Brazilian Power Electronics Conference (COBEP) Pub Date : 2017-11-01 DOI: 10.1109/COBEP.2017.8257306
Igor Henrique do Nascimento Oliveira, N. Silva
{"title":"Maximum power point tracking of a wind generator using a SEPIC converter with LMI control","authors":"Igor Henrique do Nascimento Oliveira, N. Silva","doi":"10.1109/COBEP.2017.8257306","DOIUrl":"https://doi.org/10.1109/COBEP.2017.8257306","url":null,"abstract":"The energy conversion technologies of small wind power systems are being currently studied and new topologies have been developed to improve the performance of converters associated with variable speed wind turbines. Most maximum power point tracking (MPPT) algorithms are based on turbine torque and velocity signal feedback as well as detailed knowledge of turbine model parameters. This paper proposes the implementation of a wind energy conversion system whose power extraction algorithm does not use mechanical sensors, wind measurement or predefined values that define the turbine operating point. The algorithm is the Perturbation and Observation (P&O) method, which is applied at a Single Ended Primary Inductance Converter. The choice of the SEPIC is justified due to input current characteristics and high-power processing capacity. The step-up / step-down topology is essential for retain the output voltage at specified values. A state-feedback closed-loop control with integral action using LMIs is implemented on the converting operation within a specified region. The simulation results show the performance of the presented technique.","PeriodicalId":375493,"journal":{"name":"2017 Brazilian Power Electronics Conference (COBEP)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128501325","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}
引用次数: 1
Brushless cascaded doubly-fed induction machine: Modeling and simulation 无刷级联双馈感应电机:建模与仿真
2017 Brazilian Power Electronics Conference (COBEP) Pub Date : 2017-11-01 DOI: 10.1109/COBEP.2017.8257394
Ryan O. Berriel, R. Stephan, I. Chabu, A. Ferreira
{"title":"Brushless cascaded doubly-fed induction machine: Modeling and simulation","authors":"Ryan O. Berriel, R. Stephan, I. Chabu, A. Ferreira","doi":"10.1109/COBEP.2017.8257394","DOIUrl":"https://doi.org/10.1109/COBEP.2017.8257394","url":null,"abstract":"This paper presents a steady state analysis of a Brushless Cascaded Doubly-fed Induction Machine (BCDIM) in positive and negative phase sequence connection. Additionally, a torque × speed characteristic curve is proposed, analyzed and compared with results obtained from a dynamic modeling simulation. This study is carried out for the particular condition of opened and shot-circuited auxiliary input. This result will allow the application of the BCDIM as an electrical generator for wind power energy conversion.","PeriodicalId":375493,"journal":{"name":"2017 Brazilian Power Electronics Conference (COBEP)","volume":"282 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124514319","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}
引用次数: 2
Optimal reactive power compensation in weak grids with insertion of wind and solar sources 风能和太阳能并网的弱电网无功补偿优化
2017 Brazilian Power Electronics Conference (COBEP) Pub Date : 2017-11-01 DOI: 10.1109/COBEP.2017.8257362
R. Leborgne, Y. S. Stypulkowski
{"title":"Optimal reactive power compensation in weak grids with insertion of wind and solar sources","authors":"R. Leborgne, Y. S. Stypulkowski","doi":"10.1109/COBEP.2017.8257362","DOIUrl":"https://doi.org/10.1109/COBEP.2017.8257362","url":null,"abstract":"The choice of the best locations for reactive power compensation should be made taking into account the performance of the grid from the point of view of voltage regulation for normal and contingency grid operation, and other parameters such as SCR (Short Circuit Ratio). The elevation of the SCR helps to make the grid less weak, thus improving system performance, which influences the performance of some elements such as wind turbines and HVDC converters. The objective of this work is to find the optimal location for reactive power compensation in weak systems, when the new generation of reactive support alone is not enough. The algorithm is based on exhaustive enumeration optimization method.","PeriodicalId":375493,"journal":{"name":"2017 Brazilian Power Electronics Conference (COBEP)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131101572","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}
引用次数: 2
Hardware in the loop simulation of Shunt Active Power Filter (SAPF) utilizing RTDS and dSPACE 利用RTDS和dSPACE对并联型有源电力滤波器(SAPF)进行硬件环内仿真
2017 Brazilian Power Electronics Conference (COBEP) Pub Date : 2017-11-01 DOI: 10.1109/COBEP.2017.8257402
Dalmo C. Silva, Bernardo F. Musse, N. L. Silva, P. M. de Almeida, J. G. de Oliveira
{"title":"Hardware in the loop simulation of Shunt Active Power Filter (SAPF) utilizing RTDS and dSPACE","authors":"Dalmo C. Silva, Bernardo F. Musse, N. L. Silva, P. M. de Almeida, J. G. de Oliveira","doi":"10.1109/COBEP.2017.8257402","DOIUrl":"https://doi.org/10.1109/COBEP.2017.8257402","url":null,"abstract":"This paper deals with the integration of a Shunt Active Power Filter (SAPF) to the electric power grid and a non-linear load (typically rectifier). The intention is testing the control system by Hardware In the Loop (HIL) simulation under conditions which are closer to the SAPF and the electric power grid reality. A Real Time Digital Simulator (RTDS) and digital Signal Processing And Control Engineering (dSPACE) are used. Results show the load compensation capability (harmonic current and reactive power compensation), through the interface converter. The proposed control methodology makes the system capable of compensating reactive power and harmonic currents consumed by the load, making the distortion level at the Point of Common Coupling (PCC) acceptable, according to IEEE 519. The control system was implemented in dSPACE while the electric system was implemented in RTDS.","PeriodicalId":375493,"journal":{"name":"2017 Brazilian Power Electronics Conference (COBEP)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131492345","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}
引用次数: 6
Transformerless DC-DC converter with high voltage gain based on a switched-inductor structure applied to photovoltaic systems 基于开关电感结构的高电压增益无变压器DC-DC变换器应用于光伏系统
2017 Brazilian Power Electronics Conference (COBEP) Pub Date : 2017-11-01 DOI: 10.1109/COBEP.2017.8257369
J. C. S. D. de Morais, R. Gules, J. L. S. D. de Morais, L. G. Fernandes
{"title":"Transformerless DC-DC converter with high voltage gain based on a switched-inductor structure applied to photovoltaic systems","authors":"J. C. S. D. de Morais, R. Gules, J. L. S. D. de Morais, L. G. Fernandes","doi":"10.1109/COBEP.2017.8257369","DOIUrl":"https://doi.org/10.1109/COBEP.2017.8257369","url":null,"abstract":"In photovoltaic (PV) systems, high step-up dc-dc converters are required to manage the power flow. Since the output voltage of photovoltaic source is lower than the grid voltage level, dc-dc converters with high voltage gain are the solution in transformerless topologies. A high step-up dc-dc Ćuk converter with switched-inductor is proposed in this paper. The presented topology is designed to application in current source inverters (CSI) and unfolding inverters. Furthermore, to validate theoretical analysis, a 200W prototype is implemented. Lastly, a dc rectified sinusoidal output current modulation is performed to validate its application in unfolding inverters.","PeriodicalId":375493,"journal":{"name":"2017 Brazilian Power Electronics Conference (COBEP)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129909450","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}
引用次数: 11
Detailed design procedure of a DC-DC buck-boost converter employing a passive snubber 采用无源缓冲器的DC-DC降压升压变换器的详细设计过程
2017 Brazilian Power Electronics Conference (COBEP) Pub Date : 2017-11-01 DOI: 10.1109/COBEP.2017.8257224
A. R. Vaz, F. L. Tofoli
{"title":"Detailed design procedure of a DC-DC buck-boost converter employing a passive snubber","authors":"A. R. Vaz, F. L. Tofoli","doi":"10.1109/COBEP.2017.8257224","DOIUrl":"https://doi.org/10.1109/COBEP.2017.8257224","url":null,"abstract":"This paper presents an optimized design procedure for a dc-dc buck-boost converter associated with a dissipative snubber. Initially, the static gain of the converter is determined from the charging and discharging times of the inductor in an approach that is valid for any conduction mode and does not depend on the load condition. The influence of the snubber circuit is also analyzed considering tradeoffs between the maximum voltage stress across the switch and related losses. Experimental results are also presented in order to validate the theoretical assumptions.","PeriodicalId":375493,"journal":{"name":"2017 Brazilian Power Electronics Conference (COBEP)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121317041","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}
引用次数: 2
Silent low speed self-sensing strategy for permanent magnet synchronous machines based on subtractive filtering 基于相减滤波的永磁同步电机静音低速自感知策略
2017 Brazilian Power Electronics Conference (COBEP) Pub Date : 2017-11-01 DOI: 10.1109/COBEP.2017.8257377
Joao Bonifacio, Notker Amann, R. Kennel
{"title":"Silent low speed self-sensing strategy for permanent magnet synchronous machines based on subtractive filtering","authors":"Joao Bonifacio, Notker Amann, R. Kennel","doi":"10.1109/COBEP.2017.8257377","DOIUrl":"https://doi.org/10.1109/COBEP.2017.8257377","url":null,"abstract":"The inherent advantages of sensorless control related to reliability, efficiency and costs turn it to be a very interesting technology for automotive applications. Nevertheless, the generation of acoustic noises and current bandwidth limitations due to the injection of HF voltages near zero speed limits its applicability for such high-performance applications. In this work, a newly silent self-sensing strategy, which is achieved through the reduction of the injection frequency, is presented. A novel filtering strategy, based on signal reconstruction, is introduced in order to overcome the bandwidth limitation of the current controller. Moreover, the estimation disturbances in transients are minimized due to the use of a hybrid observer. Experimental results show the effectiveness of the proposed approach.","PeriodicalId":375493,"journal":{"name":"2017 Brazilian Power Electronics Conference (COBEP)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127205644","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}
引用次数: 5
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