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Hybrid Energy Storage System Sizing for Smoothing Renewable Generation Intermittencies 平滑可再生能源发电间歇性的混合储能系统选型
2021 Brazilian Power Electronics Conference (COBEP) Pub Date : 2021-11-07 DOI: 10.1109/COBEP53665.2021.9684094
G. M. Pelz, S. A. Oliveira da Silva, L. P. Sampaio
{"title":"Hybrid Energy Storage System Sizing for Smoothing Renewable Generation Intermittencies","authors":"G. M. Pelz, S. A. Oliveira da Silva, L. P. Sampaio","doi":"10.1109/COBEP53665.2021.9684094","DOIUrl":"https://doi.org/10.1109/COBEP53665.2021.9684094","url":null,"abstract":"This paper presents a strategy for sizing the capacity of a lead-acid battery and the capacitance of an ultracapacitor that compose a passive hybrid energy storage system, useful for smoothing grid power steps caused by renewable generation sources. This analysis is based on the electrical model of the battery/ultracapacitor association, determining the settling time and the instantaneous power ratio absorbed by each one when subjected to current step input. Based on this study, the storage elements were dimensioned. The smoothing capability obtained by the hybrid storage system is analyzed in a DC-bus, in which the power balance can be analyzed. It is connected to the hybrid storage system, using two cascaded bidirectional buck-boost converters, to the generation source, and to the grid, where the last two are considered current sources. The theoretical development was validated, and the power balance in this DC-bus was analyzed by computational simulations.","PeriodicalId":442384,"journal":{"name":"2021 Brazilian Power Electronics Conference (COBEP)","volume":"44 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":"130466958","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
Differential Power Processing Applied to a Photovoltaic String with Different Modules 不同组件光伏串的差分功率处理
2021 Brazilian Power Electronics Conference (COBEP) Pub Date : 2021-11-07 DOI: 10.1109/COBEP53665.2021.9684040
Caio Meira Amaral da Luz, E. R. Ribeiro, F. L. Tofoli
{"title":"Differential Power Processing Applied to a Photovoltaic String with Different Modules","authors":"Caio Meira Amaral da Luz, E. R. Ribeiro, F. L. Tofoli","doi":"10.1109/COBEP53665.2021.9684040","DOIUrl":"https://doi.org/10.1109/COBEP53665.2021.9684040","url":null,"abstract":"The differential power processing (DPP) concept has been widely used to mitigate the negative effect of temporary photovoltaic (PV) mismatch that may be caused by shading, for instance. Permanent mismatch occurs in a PV system when the cells or modules have different electrical and/or constructive characteristics, which in turn lead to the reduction of the extracted power. This subject is an important emerging topic that has been narrowly addressed by researchers so far. In this context, this paper presents a study on the application of DPP in a PV string with permanent mismatch. A four-module string connected to PV-to-PV architecture employing the bidirectional buck-boost converter is assessed in detail. The results show that the use of a DPP converter in a string composed of modules with different specifications can increase the energy harvesting significantly.","PeriodicalId":442384,"journal":{"name":"2021 Brazilian Power Electronics Conference (COBEP)","volume":"66 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":"134568828","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
Single-Phase Current Source Rectifier With Power Decoupling Using The X - Type CSC Topology 采用X型CSC拓扑进行功率解耦的单相电流源整流器
2021 Brazilian Power Electronics Conference (COBEP) Pub Date : 2021-11-07 DOI: 10.1109/COBEP53665.2021.9684035
M. Vitorino, Lucas Vinícius de Araújo Gomes
{"title":"Single-Phase Current Source Rectifier With Power Decoupling Using The X - Type CSC Topology","authors":"M. Vitorino, Lucas Vinícius de Araújo Gomes","doi":"10.1109/COBEP53665.2021.9684035","DOIUrl":"https://doi.org/10.1109/COBEP53665.2021.9684035","url":null,"abstract":"This work proposes a topology of X-Type Current Source Rectifier (X-type CSR) that helps to mitigate the effect of the double-the-line-frequency power ripple (low frequency) in the output of a single-phase rectifier. The low frequency ripple reduction allows to increase the converter power density by reducing the volume of the DC-bus inductor, without lack of stiffness at the DC-bus. The low frequency reduction is achieved by using a different single-phase CSR topology that uses the well known X-type CSC approach which allows reduction in conducting losses and independent control for two CSCs which share the same DC-bus and the middle switches of the leg. Details of topology, control strategy and modulation are presented. Simulation and experimental results for a 500W prototype are provided to validate the theoretical approach.","PeriodicalId":442384,"journal":{"name":"2021 Brazilian Power Electronics Conference (COBEP)","volume":"450 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":"131799248","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
A Review and Performance Evaluation of Complex Repetitive Controllers in Grid-Connected Inverters 并网逆变器中复杂重复控制器的研究进展及性能评价
2021 Brazilian Power Electronics Conference (COBEP) Pub Date : 2021-11-07 DOI: 10.1109/COBEP53665.2021.9684102
R. Neto, F. Neves, H. D. de Souza, Y. N. Batista, Márcio R. S. de Carvalho, E. A. O. Barbosa
{"title":"A Review and Performance Evaluation of Complex Repetitive Controllers in Grid-Connected Inverters","authors":"R. Neto, F. Neves, H. D. de Souza, Y. N. Batista, Márcio R. S. de Carvalho, E. A. O. Barbosa","doi":"10.1109/COBEP53665.2021.9684102","DOIUrl":"https://doi.org/10.1109/COBEP53665.2021.9684102","url":null,"abstract":"Some power converter applications require their control systems to regulate or reject exogenous signals with high harmonic content, such as the active power filter. For these applications, the repetitive controller (RC) is a well-accepted solution that is commonly used in the power converter's current-control loop. Using this scheme as basis, several authors have proposed complex control structures for three-phase power converters, also known as $nk+m$ RCs. In this sense, this paper presents a comparative evaluation of the structure and performance of three complex repetitive controllers. A three-phase shunt active power filters is used to experimentally validate the performance comparison.","PeriodicalId":442384,"journal":{"name":"2021 Brazilian Power Electronics Conference (COBEP)","volume":"16 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":"123763878","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
Comparative Analysis of Alternatives for Virtual Impedance Representation in a Small-Signal Reduced-Order Model for Low-Voltage Islanded AC Microgrids 低压孤岛交流微电网小信号降阶模型虚拟阻抗表示方法的比较分析
2021 Brazilian Power Electronics Conference (COBEP) Pub Date : 2021-11-07 DOI: 10.1109/COBEP53665.2021.9684120
S. D. J. Manrique Machado, S. A. Oliveira da Silva, José Roberto Boffino de Almeida Monteiro
{"title":"Comparative Analysis of Alternatives for Virtual Impedance Representation in a Small-Signal Reduced-Order Model for Low-Voltage Islanded AC Microgrids","authors":"S. D. J. Manrique Machado, S. A. Oliveira da Silva, José Roberto Boffino de Almeida Monteiro","doi":"10.1109/COBEP53665.2021.9684120","DOIUrl":"https://doi.org/10.1109/COBEP53665.2021.9684120","url":null,"abstract":"The development of high-fidelity and computational-effective microgrid models is crucial to assess the performance of microgrids in real-time applications. Therefore, the development of accurate reduced-order (R-O) microgrid models plays a fundamental role in the deployment of this concept. On the other hand, the virtual impedance techniques are essential for power decoupling and microgrid damping. However, the virtual impedance representation in R-O models has not been properly addressed in the literature. Hence, this paper explores two different alternatives for the virtual impedance representation in a reduced-order (R-O) microgrid model: i. the inclusion of virtual impedance inside the network model using Kron reduction; and ii. The inclusion of virtual impedance inside the grid-forming converter model. It was found that for low values of the voltage droop coefficient, both approaches provide similar results. However, as the voltage droop coefficient increases, the second alternative leads to more accurate results. Simulation and experimental results are presented in order to validate the analysis done.","PeriodicalId":442384,"journal":{"name":"2021 Brazilian Power Electronics Conference (COBEP)","volume":"29 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":"126048278","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
Different Methods to Connect Switched Capacitor Ladder Cells to Provide High-Step-Down Converters 连接开关电容梯级单元以提供高降压转换器的不同方法
2021 Brazilian Power Electronics Conference (COBEP) Pub Date : 2021-11-07 DOI: 10.1109/COBEP53665.2021.9684136
N. C. dal Pont, T. Lazzarin, B. Lehman
{"title":"Different Methods to Connect Switched Capacitor Ladder Cells to Provide High-Step-Down Converters","authors":"N. C. dal Pont, T. Lazzarin, B. Lehman","doi":"10.1109/COBEP53665.2021.9684136","DOIUrl":"https://doi.org/10.1109/COBEP53665.2021.9684136","url":null,"abstract":"This work presents a comparison between the ladder and the cascade connection of the ladder step-down switched-capacitor cell. The paper studies both connections and also proposes a mix of both. All of them are compared to the same input voltage and the number of switches. The comparison approaches issues as static gain, the voltage and current stress, voltage regulation, and efficiency. The comparison is carried out by checking a conversion from 48 V to 3 or 6 V using only switched capacitors. Theoretical analysis are corroborated by simulation results.","PeriodicalId":442384,"journal":{"name":"2021 Brazilian Power Electronics Conference (COBEP)","volume":"82 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":"124708391","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
ZVS-PWM Active-Clamping Differential Tapped-Inductor Boost Converter ZVS-PWM有源箝位差动抽头电感升压变换器
2021 Brazilian Power Electronics Conference (COBEP) Pub Date : 2021-11-07 DOI: 10.1109/COBEP53665.2021.9684146
Tomás Adão Gonçalves, T. M. K. Faistel, A. Andrade, M. L. da Silva Martins
{"title":"ZVS-PWM Active-Clamping Differential Tapped-Inductor Boost Converter","authors":"Tomás Adão Gonçalves, T. M. K. Faistel, A. Andrade, M. L. da Silva Martins","doi":"10.1109/COBEP53665.2021.9684146","DOIUrl":"https://doi.org/10.1109/COBEP53665.2021.9684146","url":null,"abstract":"This paper proposes a novel ZVS-PWM Active clamping boost converter with a differential tapped-winding arrangement. The tapped-inductor winding arrangement allows the converter achieve a very high output voltage gain with turns-ratio close to the unity and duty-cycle within the safe range of operation.","PeriodicalId":442384,"journal":{"name":"2021 Brazilian Power Electronics Conference (COBEP)","volume":"36 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":"129562189","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
Small signal analysis for an arbitrary number of ZVS PSM FB converters in an Input-Parallel Output-Series configuration 在输入-并联-输出-串联配置中任意数量的ZVS PSM FB转换器的小信号分析
2021 Brazilian Power Electronics Conference (COBEP) Pub Date : 2021-11-07 DOI: 10.1109/COBEP53665.2021.9684062
Nícolas Eugênio Lima Basquera, Gláucio Roberto Tessmer Hax, Caio Guilherme da Silva Moraes, G. Waltrich, J. Pomilio
{"title":"Small signal analysis for an arbitrary number of ZVS PSM FB converters in an Input-Parallel Output-Series configuration","authors":"Nícolas Eugênio Lima Basquera, Gláucio Roberto Tessmer Hax, Caio Guilherme da Silva Moraes, G. Waltrich, J. Pomilio","doi":"10.1109/COBEP53665.2021.9684062","DOIUrl":"https://doi.org/10.1109/COBEP53665.2021.9684062","url":null,"abstract":"The Zero Voltage Phase Shift Modulated Full Bridge (ZVS PSM FB) converter has been widely used for high frequency isolated dc-dc stage of dc charging stations for electric vehicles. One of the main challenges of this topology is to process high powers over a wide output voltage range. To overcome this issue, some studies have considered the association of multiples ZVS PSM FB converters in an Input Parallel Output Series (IPOS) configuration. This paper presents a small signal analysis that can be widely employed to characterize the transfer functions of this topology with an arbitrary number of converters in order to attend high power applications with a wide output voltage range.","PeriodicalId":442384,"journal":{"name":"2021 Brazilian Power Electronics Conference (COBEP)","volume":"217 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":"128171572","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
A Novel Non-invasive Method to Measure Power Consumption on Smartphones 一种新的非侵入式智能手机功耗测量方法
2021 Brazilian Power Electronics Conference (COBEP) Pub Date : 2021-11-07 DOI: 10.1109/COBEP53665.2021.9684072
J. O. De Sousa, Gustavo C. Fonseca, José W. A. de Oliveira, Ricardo N. Santos
{"title":"A Novel Non-invasive Method to Measure Power Consumption on Smartphones","authors":"J. O. De Sousa, Gustavo C. Fonseca, José W. A. de Oliveira, Ricardo N. Santos","doi":"10.1109/COBEP53665.2021.9684072","DOIUrl":"https://doi.org/10.1109/COBEP53665.2021.9684072","url":null,"abstract":"Studies related to smartphone power consumption have intensified in recent years motivated not only by the significant increase in the number of users, but also by the increase in daily usage time by an average user. Therefore, considering that the power supply of mobile devices is limited by the battery capacity, an accurate method to measure power consumption in mobile devices is necessary. However, the current hardware approach used by researchers and industry can cause damage in non-removable battery devices or it may require a long time to measure precisely the power consumption on smartphones. In this paper, we use a new non-invasive method to measure the energy consumed by smartphones. The evaluation results confirm that this method ensures support for all models of smartphones that use the Android operational system based with Linux kernel so far. The switch mode method has an accuracy of 98,18% when compared with the current method used by industry and avoids the high costs of the invasive approaches. The power consumption of important features of a smartphone were measured and divided in five classes. The results show that camera, display, speaker and 5G are the hardware components with highest power consumption compared to the other parts of the smartphone. As future work, the results obtained shall be used to describe a model to estimate and reduce the high power consumption from hardware consumption classes.","PeriodicalId":442384,"journal":{"name":"2021 Brazilian Power Electronics Conference (COBEP)","volume":"92 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":"128973448","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
Modelling and Controller Design for Y-Source Inverter Applied in Stand-Alone PV System 单机光伏系统中y源逆变器的建模与控制器设计
2021 Brazilian Power Electronics Conference (COBEP) Pub Date : 2021-11-07 DOI: 10.1109/COBEP53665.2021.9684108
M. Rodrigues, F. A. Serrão Gonçalves, R. Santos, F. Marafão
{"title":"Modelling and Controller Design for Y-Source Inverter Applied in Stand-Alone PV System","authors":"M. Rodrigues, F. A. Serrão Gonçalves, R. Santos, F. Marafão","doi":"10.1109/COBEP53665.2021.9684108","DOIUrl":"https://doi.org/10.1109/COBEP53665.2021.9684108","url":null,"abstract":"The impedance source network inverters have interesting operational advantages over conventional inverters, allowing flexible operation as step-up/step-down converters, without the need to avoid simultaneous conduction of power switches located at the same inverter leg. In this context, inverters based on Y -type impedance networks have convenient features which solve several issues related to photovoltaic (PV) applications. Nevertheless, the non- minimum phase characteristics of such converter makes the control design complex. Therefore, this paper presents a complete modelling and control methodology which allows the integration of the Y-Source inverter (YSI) in a stand-alone single-phase photovoltaic generation application. The small-signal model for YSI is presented in detail together with design methodologies for the DC and AC side controllers. Moreover, the proposed control schemes were validated with computer simulations considering the Y -source inverter feeding both linear and non-linear loads.","PeriodicalId":442384,"journal":{"name":"2021 Brazilian Power Electronics Conference (COBEP)","volume":"294 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":"114528333","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
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