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A Novel Family of Single Switch High Step-Up DC/DC Converters for PV applications 一种新型的单开关高升压DC/DC变换器
2021 Brazilian Power Electronics Conference (COBEP) Pub Date : 2021-11-07 DOI: 10.1109/COBEP53665.2021.9684006
Aline V. C. Pereira, M. Cavalcanti, G. Azevedo, F. Bradaschia, M. R. Carvalho
{"title":"A Novel Family of Single Switch High Step-Up DC/DC Converters for PV applications","authors":"Aline V. C. Pereira, M. Cavalcanti, G. Azevedo, F. Bradaschia, M. R. Carvalho","doi":"10.1109/COBEP53665.2021.9684006","DOIUrl":"https://doi.org/10.1109/COBEP53665.2021.9684006","url":null,"abstract":"In photovoltaic applications, a high gain converter is required to increase the voltage. The presented paper proposes a new family of DC/DC step-up converters with three-windings magnetic coupling and two voltage multiplier cells. The use of voltage-boosting technique allows the topologies to achieve high voltage gain with smaller duty cycle and turn ratio. The voltage stress across the power switch is reduced. As a result, low on-state resistance MOSFET can be employed, minimizing conduction loss. Moreover, the switch operates with zero-current switching at turn-on time. This leads to negligible turn-on switching loss. Additionally, all diodes turn off with zero-current switching, eliminating reverse recovery losses. The proposed family features, operating principles and simulation results are also discussed in the paper.","PeriodicalId":442384,"journal":{"name":"2021 Brazilian Power Electronics Conference (COBEP)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133629958","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: 0
The development of an Educational Tool for the Teaching of Distributed Generation and Renewable Energy Concepts in Elementary Schools 小学分布式发电和可再生能源概念教学工具的开发
2021 Brazilian Power Electronics Conference (COBEP) Pub Date : 2021-11-07 DOI: 10.1109/COBEP53665.2021.9684116
Lucas Augusto Rabaiolli Mazocco, Ruan Juarez Bulsing, R. Beltrame, Antônio Kaminski Júnior, T. Marchesan
{"title":"The development of an Educational Tool for the Teaching of Distributed Generation and Renewable Energy Concepts in Elementary Schools","authors":"Lucas Augusto Rabaiolli Mazocco, Ruan Juarez Bulsing, R. Beltrame, Antônio Kaminski Júnior, T. Marchesan","doi":"10.1109/COBEP53665.2021.9684116","DOIUrl":"https://doi.org/10.1109/COBEP53665.2021.9684116","url":null,"abstract":"This paper presents the proposed methodology and the results of teaching renewable energy and distributed generation concepts (theory and practice) in an elementary school. In order to achieve the proposed objectives, an educational tool was developed, which is composed of a model of a sustainable city connected to a supervision and control system through a smartphone. As the main result, it was possible to motivate students to learn more about the concepts related to energy generation, as well as to spread out this knowledge outside the school.","PeriodicalId":442384,"journal":{"name":"2021 Brazilian Power Electronics Conference (COBEP)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122168723","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 and Robust Control Techniques applied to DC-DC Buck-Boost Converter 应用于DC-DC Buck-Boost变换器的最优鲁棒控制技术
2021 Brazilian Power Electronics Conference (COBEP) Pub Date : 2021-11-07 DOI: 10.1109/COBEP53665.2021.9684012
Ademir da S. Toledo Júnior, P. M. de Almeida, P. G. Barbosa, M. C. Fernandes, I. D. de Souza
{"title":"Optimal and Robust Control Techniques applied to DC-DC Buck-Boost Converter","authors":"Ademir da S. Toledo Júnior, P. M. de Almeida, P. G. Barbosa, M. C. Fernandes, I. D. de Souza","doi":"10.1109/COBEP53665.2021.9684012","DOIUrl":"https://doi.org/10.1109/COBEP53665.2021.9684012","url":null,"abstract":"This study pursues to control a Buck-Boost converter with an optimal-robust linear matrix inequalities (LMI)-based method, which has been discussed on previous works, but this work focus on this versatile converter, which can operate as a step-up or step-down converter. Then, it is compared to a con-ventional optimal control technique, known as linear quadratic regulator (LQR) method, showing that the previous can handle uncertainty on its parameters where the latter may not.","PeriodicalId":442384,"journal":{"name":"2021 Brazilian Power Electronics Conference (COBEP)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125188208","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: 0
Dynamic Modeling of an Active Current Doubler Rectifier Applied to Resonant Converters 用于谐振变换器的有源倍流整流器的动态建模
2021 Brazilian Power Electronics Conference (COBEP) Pub Date : 2021-11-07 DOI: 10.1109/COBEP53665.2021.9684134
Renita Pinto, E.F.C. Grabowsky, M. Heldwein
{"title":"Dynamic Modeling of an Active Current Doubler Rectifier Applied to Resonant Converters","authors":"Renita Pinto, E.F.C. Grabowsky, M. Heldwein","doi":"10.1109/COBEP53665.2021.9684134","DOIUrl":"https://doi.org/10.1109/COBEP53665.2021.9684134","url":null,"abstract":"A current doubler rectifier typically uses only two diodes, i.e. single quadrant passive switches, at the output stage of isolated dc-dc converters and, thus, is not able to actively define the voltage at the load port. The active current doubler rectifier (ACD) uses current unidirectional two-quadrant switches in order to provide such control for applications that might require it. However, literature on the models that are able to effectively predict the dynamics of such active rectifiers is lacking. This, the ACD is modeled here based on dynamic phasors in a state space form for its resonant operation. The developed models show how the switching phase affects this rectifier currents and voltages, and provides an important tool to design control loops. An LC resonant tank is exemplarily used with the ACD. However, the procedure can be applied to other types of topologies. Design and exnerimental results corroborate the modeling.","PeriodicalId":442384,"journal":{"name":"2021 Brazilian Power Electronics Conference (COBEP)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114958938","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: 0
Modeling, Control and Operation of a 10 MW Direct-Drive Wind Energy Conversion System 10mw直接驱动风能转换系统的建模、控制和运行
2021 Brazilian Power Electronics Conference (COBEP) Pub Date : 2021-11-07 DOI: 10.1109/COBEP53665.2021.9684150
L. B. K. Fisch, M. Heldwein
{"title":"Modeling, Control and Operation of a 10 MW Direct-Drive Wind Energy Conversion System","authors":"L. B. K. Fisch, M. Heldwein","doi":"10.1109/COBEP53665.2021.9684150","DOIUrl":"https://doi.org/10.1109/COBEP53665.2021.9684150","url":null,"abstract":"The constant evolution of wind energy conversion systems (WECSs), especially in offshore applications, brings new trends to the wind energy market. Recently, industrial advances have proposed WECSs of 10-16 MW, and some of these are still under development. In addition, new grid codes are devised to connect the wind system to the grid. Therefore, adequate control systems are necessary to guarantee the operation of the WECSs. For this reason, this work proposes to develop a direct drive wind energy conversion system model with a rated power of 10 MW, following the trends in the offshore wind energy market. The main objective is to provide the literature with a wind system with current characteristics and a complete control system, allowing detailed studies of dynamic interaction, power quality, stability analysis and control strategies applied to grid-connected systems, including low voltage ride through (LVRT) operation. In general, the proposed system was divided into four energy conversion subsystems: wind turbine (WT), permanent magnet synchronous generator (PMSG), rectifier and inverter stages. Model parameters including WT, PMSG, power converter and operating strategies are discussed. The main results are presented for a 10-MW WECS with the proposed operation strategy, which were obtained from MATLAB / Simulink simulations.","PeriodicalId":442384,"journal":{"name":"2021 Brazilian Power Electronics Conference (COBEP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130148035","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: 0
Effect of PLL on Current Distortion of Droop-Controlled Converters in a Control-In-the-Loop Simulation of a Microgrid 微电网环内控制仿真中锁相环对垂控变换器电流畸变的影响
2021 Brazilian Power Electronics Conference (COBEP) Pub Date : 2021-11-07 DOI: 10.1109/COBEP53665.2021.9684057
Eliabe Duarte Queiroz, J. I. Yutaka Ota, J. Pomilio
{"title":"Effect of PLL on Current Distortion of Droop-Controlled Converters in a Control-In-the-Loop Simulation of a Microgrid","authors":"Eliabe Duarte Queiroz, J. I. Yutaka Ota, J. Pomilio","doi":"10.1109/COBEP53665.2021.9684057","DOIUrl":"https://doi.org/10.1109/COBEP53665.2021.9684057","url":null,"abstract":"A grid-following converter in ac microgrids must include grid synchronization algorithms, such as Phase-Lock Loop (PLL) systems, within its control system, so it is able to properly inject or absorb power. PLL plays an important role to guarantee the stable operation of the converter for distinct grid conditions, and it becomes critical in microgrids with multiple converters, where mutual influence among the control and the interface passive devices of individual converters exists. Moreover, as long as PLLs basically estimate the system phase from voltages on their point of coupling to the grid, the grid synchronization is subjected to errors due to the digital-to-analog conversion and signal processing through conditioning circuits. The paper proposes the discussion on the mutual effects of PLL choice in two grid-following converters in a microgrid and on the impacts of errors introduced by voltage detection of the PLL. Results from real-time simulation through Control-In-the-Loop are presented.","PeriodicalId":442384,"journal":{"name":"2021 Brazilian Power Electronics Conference (COBEP)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124740011","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
Modeling and controllers design for three-leg and four-leg grid-forming converters: A benchmark 三腿和四腿并网变换器的建模和控制器设计:一个基准
2021 Brazilian Power Electronics Conference (COBEP) Pub Date : 2021-11-07 DOI: 10.1109/COBEP53665.2021.9684039
Jéssica S. Döhler, D. C. Silva Júnior, J. G. de Oliveira, A. Ferreira
{"title":"Modeling and controllers design for three-leg and four-leg grid-forming converters: A benchmark","authors":"Jéssica S. Döhler, D. C. Silva Júnior, J. G. de Oliveira, A. Ferreira","doi":"10.1109/COBEP53665.2021.9684039","DOIUrl":"https://doi.org/10.1109/COBEP53665.2021.9684039","url":null,"abstract":"We approach the modeling and a control strategy for three-phase three-leg three-wire and four-leg four-wire grid-forming converter under unbalanced conditions in an au-tonomous distribution network. In most cases, the analysis of three-phase AC power systems becomes simplified when the system is in three-leg three-wire configuration and perfectly balanced. However, one of the biggest challenges of grid-forming converter is to guarantee the quality in the energy supply, highlighting the voltage unbalanced caused by unbalanced load. Therefore, this paper aims at analyzing operation of three-leg three-wire and four-leg four-wire grid-forming converters under unbalanced conditions. The control scheme is a cascaded control with two loops referenced in the synchronous reference frame: (i) An inner current loop and (ii) an outer voltage loop. Simulations and experimental results are provided to verify the performance of the proposed control strategy.","PeriodicalId":442384,"journal":{"name":"2021 Brazilian Power Electronics Conference (COBEP)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123819630","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: 0
Instantaneous Adaptive Controller Based on Neural Network for Buck Converter 基于神经网络的Buck变换器瞬时自适应控制器
2021 Brazilian Power Electronics Conference (COBEP) Pub Date : 2021-11-07 DOI: 10.1109/COBEP53665.2021.9684052
Carlúcio Pereira da Silva, Luiz Fernando Marquez Arruda, Diego Santos Greff
{"title":"Instantaneous Adaptive Controller Based on Neural Network for Buck Converter","authors":"Carlúcio Pereira da Silva, Luiz Fernando Marquez Arruda, Diego Santos Greff","doi":"10.1109/COBEP53665.2021.9684052","DOIUrl":"https://doi.org/10.1109/COBEP53665.2021.9684052","url":null,"abstract":"The proposal for this work is a technique for the control of a Buck DC-DC converter, called Instantaneous Adaptative Neural Network Controller (IANNC). The proposed control method uses a Perceptron neural network that finds to keep the converter's output voltage stable. Through the IANNC it is possible to establish the appropriate duty cycle for the pulse width modulation (PWM). The proposed method was compared with a classic Proportional Integral Derivative (PID) controller to validate the results obtained. The results were obtained through the numerical simulator PSIM and physical prototype, where the stability of the converter's output voltage against a resistive load was considered.","PeriodicalId":442384,"journal":{"name":"2021 Brazilian Power Electronics Conference (COBEP)","volume":"57 33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124350461","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: 0
Predictive Current Control Applied to Induction Machine Drive Systems Operating Under Single-Phase Open-Circuit Fault 单相开路故障下感应电机驱动系统的预测电流控制
2021 Brazilian Power Electronics Conference (COBEP) Pub Date : 2021-11-07 DOI: 10.1109/COBEP53665.2021.9684113
Liane M. de Oliveira, V. B. Melo, Gilielson F. da Paz, F. V. Rocha, E. Fabrício
{"title":"Predictive Current Control Applied to Induction Machine Drive Systems Operating Under Single-Phase Open-Circuit Fault","authors":"Liane M. de Oliveira, V. B. Melo, Gilielson F. da Paz, F. V. Rocha, E. Fabrício","doi":"10.1109/COBEP53665.2021.9684113","DOIUrl":"https://doi.org/10.1109/COBEP53665.2021.9684113","url":null,"abstract":"This paper discusses the use of the Predictive Current Control (PCC) method in three fault-tolerant induction machine drive systems when they operate under single-phase open-circuit fault. Despite the fact that these drive systems have already been discussed in the literature, the reported papers always make use of either Field-Oriented-Control (FOC)- or Direct-Torque-Control (DTC)-based fault compensation strategies. In this way, performed simulations and experiments show that PCC-based strategies are feasible and are able to provide proper post-fault operation. Also, a comparison between FOC and PCC for all discussed drive systems is performed, showing that PCC provides much better transient response, with lower current and torque oscillations.","PeriodicalId":442384,"journal":{"name":"2021 Brazilian Power Electronics Conference (COBEP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116872763","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: 0
Challenges for Loss-of-Mains Protection System in Inverter-Based Resources Applications 基于逆变器的资源应用中失电保护系统的挑战
2021 Brazilian Power Electronics Conference (COBEP) Pub Date : 2021-11-07 DOI: 10.1109/COBEP53665.2021.9684090
Andrei da Cunha Lima, Anderson Luis do N. Severo, Luiz Fernando R. Menegazzo, L. Michels, Catherine Marquioro de Freitas, Fabricio Andrade Mourinho, Igor Antônio B. de Bitencourt
{"title":"Challenges for Loss-of-Mains Protection System in Inverter-Based Resources Applications","authors":"Andrei da Cunha Lima, Anderson Luis do N. Severo, Luiz Fernando R. Menegazzo, L. Michels, Catherine Marquioro de Freitas, Fabricio Andrade Mourinho, Igor Antônio B. de Bitencourt","doi":"10.1109/COBEP53665.2021.9684090","DOIUrl":"https://doi.org/10.1109/COBEP53665.2021.9684090","url":null,"abstract":"Ahstract-Loss-of-mains (LoM) or anti-islanding utility protection has been one of main concerts in Inverter-based Resources (IBR) applications. Nowadays, many LOM detection methods have been designed to be excessively sensitive to comply with some standards requirements which only accept tight non-detection zones (NDZ). As a result, false islanding detection events has been often observed resulting in undesirable IBR disconnections. On the other hand, recent grid -connection stan-dards have included some immunity requirements to avoid false islanding detections since they can result in electric grid. This paper presents an experimental evaluation of the immunity of some commercial IBR under different grid disturbances such as power frequency drifts and voltage sags. It was considered for this evaluation some grid-connected photovoltaic inverters which comply with Brazilian standard NBR 16149. Results show that some commercial equipment disconnect under normal voltage/frequency grid oscillations. Therefore it is demonstrated that Brazilian standards for IBR may consider additional tests to improve the resilience of the electric system.","PeriodicalId":442384,"journal":{"name":"2021 Brazilian Power Electronics Conference (COBEP)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134233027","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
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