Pub Date : 2024-12-11DOI: 10.1109/TLA.2024.10789626
Felipe Rodrigues Perche Mahlow;André Felipe Zanella;William Alberto Cruz Castañeda;Regilene Aparecida Sarzi-Ribeiro
In recent years, Generative Artificial Intelligence (GenAI) has undergone a profound transformation in addressing intricate tasks involving diverse modalities such as textual, auditory, visual, and pictorial generation. Within this spectrum, text-to-image (TTI) models have emerged as a formidable approach to generating varied and aesthetically appealing compositions, spanning applications from artistic creation to realistic facial synthesis, and demonstrating significant advancements in computer vision, image processing, and multimodal tasks. The advent of Latent Diffusion Models (LDMs) signifies a paradigm shift in the domain of AI capabilities. This article delves into the feasibility of employing the Stable Diffusion LDM to illustrate literary works. For this exploration, seven classic Brazilian books have been selected as case studies. The objective is to ascertain the practicality of this endeavor and to evaluate the potential of Stable Diffusion in producing illustrations that augment and enrich the reader's experience. We will outline the beneficial aspects, such as the capacity to generate distinctive and contextually pertinent images, as well as the drawbacks, including any shortcomings in faithfully capturing the essence of intricate literary depictions. Through this study, we aim to provide a comprehensive assessment of the viability and efficacy of utilizing AI-generated illustrations in literary contexts, elucidating both the prospects and challenges encountered in this pioneering application of technology.
{"title":"Illustrating Classic Brazilian Books using a Text-To-Image Diffusion Model","authors":"Felipe Rodrigues Perche Mahlow;André Felipe Zanella;William Alberto Cruz Castañeda;Regilene Aparecida Sarzi-Ribeiro","doi":"10.1109/TLA.2024.10789626","DOIUrl":"https://doi.org/10.1109/TLA.2024.10789626","url":null,"abstract":"In recent years, Generative Artificial Intelligence (GenAI) has undergone a profound transformation in addressing intricate tasks involving diverse modalities such as textual, auditory, visual, and pictorial generation. Within this spectrum, text-to-image (TTI) models have emerged as a formidable approach to generating varied and aesthetically appealing compositions, spanning applications from artistic creation to realistic facial synthesis, and demonstrating significant advancements in computer vision, image processing, and multimodal tasks. The advent of Latent Diffusion Models (LDMs) signifies a paradigm shift in the domain of AI capabilities. This article delves into the feasibility of employing the Stable Diffusion LDM to illustrate literary works. For this exploration, seven classic Brazilian books have been selected as case studies. The objective is to ascertain the practicality of this endeavor and to evaluate the potential of Stable Diffusion in producing illustrations that augment and enrich the reader's experience. We will outline the beneficial aspects, such as the capacity to generate distinctive and contextually pertinent images, as well as the drawbacks, including any shortcomings in faithfully capturing the essence of intricate literary depictions. Through this study, we aim to provide a comprehensive assessment of the viability and efficacy of utilizing AI-generated illustrations in literary contexts, elucidating both the prospects and challenges encountered in this pioneering application of technology.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"22 12","pages":"1000-1008"},"PeriodicalIF":1.3,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10789626","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-11DOI: 10.1109/TLA.2024.10789631
Marco Carnaghi;Marcos Judewicz;Paula Cervellini;Rogelio Garcia Retegui;Marcos Funes
Direct current (DC) networking microgrids have gained prominence as a means to integrate renewable energy sources and enhance system resilience. However, these types of microgrids heavily rely on communication networks, whose inherent time delays can significantly impact system stability. Additionally, the presence of various, often non-linear load characteristics further complicates the scenario. In this paper, a delay-dependent stability analysis for networking microgrids is presented, with a specific focus on robust operation in the presence of active loads. The formulation also accounts for the uncertain and varying nature of loads within microgrids.The results show that active loads impose more stringent constraints on feasible operating conditions, consensus matrix design, and controller tuning.
{"title":"Stability of Networking DC Microgrids with Active Loads","authors":"Marco Carnaghi;Marcos Judewicz;Paula Cervellini;Rogelio Garcia Retegui;Marcos Funes","doi":"10.1109/TLA.2024.10789631","DOIUrl":"https://doi.org/10.1109/TLA.2024.10789631","url":null,"abstract":"Direct current (DC) networking microgrids have gained prominence as a means to integrate renewable energy sources and enhance system resilience. However, these types of microgrids heavily rely on communication networks, whose inherent time delays can significantly impact system stability. Additionally, the presence of various, often non-linear load characteristics further complicates the scenario. In this paper, a delay-dependent stability analysis for networking microgrids is presented, with a specific focus on robust operation in the presence of active loads. The formulation also accounts for the uncertain and varying nature of loads within microgrids.The results show that active loads impose more stringent constraints on feasible operating conditions, consensus matrix design, and controller tuning.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"22 12","pages":"1042-1053"},"PeriodicalIF":1.3,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10789631","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-30DOI: 10.1109/TLA.2024.10738270
Rodolfo Orosco Guerrero;Elias José Juan Rodríguez Segura;José Juan Martínez Nolasco;Fany Rodriguez
This paper presents the development, analysis and testing of a dynamic model for a boost converter powered by a photovoltaic panel. The mathematical model of the panel is presented and a strategy is proposed to integrate its nonlinear dynamics into the dynamic model of the boost converter. Emphasis is placed on the dynamic behavior, leaving the modeling of the effects of parasitic losses inherent to electronic devices for a future study. A discrete model that is feasible to implement in an FPGA to achieve HIL simulation in real time is shown. An optimized strategy of implementation of nonlinear functions implemented in lookup tables is presented. That strategy allows optimizing the resolution without affecting the calculation latency. A latency analysis of the calculation of the model states is also included where a time of 100ns is established for each simulation step. This latency time is sufficient for real-time simulations. Finally, comparisons of results with a software-based simulator to validates the proposed model are shown.
本文介绍了由光伏电池板供电的升压转换器动态模型的开发、分析和测试。文中介绍了光伏板的数学模型，并提出了将其非线性动态特性纳入升压转换器动态模型的策略。重点放在动态行为上，对电子设备固有寄生损耗影响的建模留待今后研究。图中展示了一个离散模型，该模型可以在 FPGA 中实现实时 HIL 仿真。介绍了在查找表中实现非线性函数的优化实施策略。该策略可在不影响计算延迟的情况下优化分辨率。此外，还对模型状态计算的延迟时间进行了分析，确定每个模拟步骤的延迟时间为 100ns。这一延迟时间足以满足实时模拟的要求。最后，还展示了与软件模拟器的结果比较，以验证所提出的模型。
{"title":"Low Cost and Optimized FPGA-HIL Real Time Simulation of a Boost Converter Powered by a Photovoltaic Panel","authors":"Rodolfo Orosco Guerrero;Elias José Juan Rodríguez Segura;José Juan Martínez Nolasco;Fany Rodriguez","doi":"10.1109/TLA.2024.10738270","DOIUrl":"https://doi.org/10.1109/TLA.2024.10738270","url":null,"abstract":"This paper presents the development, analysis and testing of a dynamic model for a boost converter powered by a photovoltaic panel. The mathematical model of the panel is presented and a strategy is proposed to integrate its nonlinear dynamics into the dynamic model of the boost converter. Emphasis is placed on the dynamic behavior, leaving the modeling of the effects of parasitic losses inherent to electronic devices for a future study. A discrete model that is feasible to implement in an FPGA to achieve HIL simulation in real time is shown. An optimized strategy of implementation of nonlinear functions implemented in lookup tables is presented. That strategy allows optimizing the resolution without affecting the calculation latency. A latency analysis of the calculation of the model states is also included where a time of 100ns is established for each simulation step. This latency time is sufficient for real-time simulations. Finally, comparisons of results with a software-based simulator to validates the proposed model are shown.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"22 11","pages":"962-970"},"PeriodicalIF":1.3,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10738270","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-29DOI: 10.1109/TLA.2024.10738344
Gabriel M. Domingues Filho;Caetano M. Ranieri;Saulo Neves Matos;Rodolfo Ipolito Meneguette;Jó Ueyama
Flooding is one of the most impactful natural disasters, causing significant losses and prompting extensive research into monitoring water levels in urban streams. Current technologies rely on pressure and ultrasonic sensors, which, while accurate, can be susceptible to damage from floods and are often costly. As an alternative, ground camera approaches offer a low-cost solution; however, most of these methods use raw images from the water stream and are sensitive to environmental factors. We address this gap with a dataset comprising a visual marker with black bars indicating the water level, which we refer to as "barcode panel". We employed various deep learning algorithms to predict the water level and compared their performance. The proposed approach was evaluated using classic classification and error metrics. The models demonstrated accuracy in detecting the water level. These promising results provide important insights for practical applications and future studies.
{"title":"Deep Learning and object detection for water level measurement using patterned visual markers","authors":"Gabriel M. Domingues Filho;Caetano M. Ranieri;Saulo Neves Matos;Rodolfo Ipolito Meneguette;Jó Ueyama","doi":"10.1109/TLA.2024.10738344","DOIUrl":"https://doi.org/10.1109/TLA.2024.10738344","url":null,"abstract":"Flooding is one of the most impactful natural disasters, causing significant losses and prompting extensive research into monitoring water levels in urban streams. Current technologies rely on pressure and ultrasonic sensors, which, while accurate, can be susceptible to damage from floods and are often costly. As an alternative, ground camera approaches offer a low-cost solution; however, most of these methods use raw images from the water stream and are sensitive to environmental factors. We address this gap with a dataset comprising a visual marker with black bars indicating the water level, which we refer to as \"barcode panel\". We employed various deep learning algorithms to predict the water level and compared their performance. The proposed approach was evaluated using classic classification and error metrics. The models demonstrated accuracy in detecting the water level. These promising results provide important insights for practical applications and future studies.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"22 11","pages":"892-898"},"PeriodicalIF":1.3,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10738344","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-29DOI: 10.1109/TLA.2024.10738269
Marco Quispe;Javier Samaniego;Jorge Olivares;Rolando Adriano;Brayan Perez;Saúl Inca
Specific Absorption Rate (SAR) measurement systems are used to evaluate exposure to fields radiated by wireless devices placed close to people's bodies. One of the fundamental elements of these systems is an isotropic electric field sensor that is small relative to the radiated wavelength. The obtained SAR value must be compared with the basic restriction levels or exposure limits established by the International Commission on Non-Ionizing Radiation Protection (ICNIRP) or similar international bodies. This work presents the design and implementation of a novel isotropic electric field sensor made with low-cost materials and processes. The response of the developed sensor was compared with the response of a commercial probe in order to perform calibration. The calibration methodology proposed in this work allows transforming voltage measured with the developed low-cost probe to electric field values measured with a calibrated commercial probe in order to calculate SAR values. The results show that the developed sensor can be used in SAR measurement processes.
比吸收率（SAR）测量系统用于评估人们暴露在靠近身体的无线设备辐射场中的情况。这些系统的基本要素之一是一个相对于辐射波长较小的各向同性电场传感器。获得的 SAR 值必须与国际非电离辐射防护委员会（ICNIRP）或类似国际机构规定的基本限制水平或暴露限值进行比较。这项工作介绍了一种新型各向同性电场传感器的设计和实施，该传感器采用低成本材料和工艺制成。为了进行校准，将所开发传感器的响应与商用探头的响应进行了比较。这项工作中提出的校准方法可以将使用所开发的低成本探头测量的电压值转换为使用校准过的商用探头测量的电场值，从而计算出 SAR 值。结果表明，开发的传感器可用于 SAR 测量过程。
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Pub Date : 2024-10-29DOI: 10.1109/TLA.2024.10738345
Krishna Velmajala;Srinivasa Rao Sandepudi
In this paper a high step-up DC-DC converter is proposed with reconfiguration capability that can operate safely without redundancy even if one of its power electronic switches fails. The proposed converter topology provides continuous input current, reduce voltage stress, uniform current sharing among power electronic switches, common grounding features, and also reduces the power handled by the power electronic devices using alternate paths, thereby improves the converter overall efficiency. Further, the control technique used for the converter reduces the transients during the healthy and fault operations. A fuse-MOSFET pair has been used to protect the converter from short-circuit faults. The proposed converter characteristic is analyzed in the continuous current mode (CCM), and its features are discussed in detail for both healthy and fault operation. The proposed converter was designed, fabricated and experimentally tested in a closed loop at 100 W to verify the operation and feasibility of the controller designed for both healthy and fault operation.
本文提出了一种具有重新配置能力的高升压直流-直流转换器，即使其中一个电力电子开关发生故障，它也能在没有冗余的情况下安全运行。所提出的转换器拓扑结构可提供连续的输入电流、降低电压应力、在电力电子开关之间实现均匀的电流共享、共同接地功能，还可减少电力电子设备使用备用路径处理的功率，从而提高转换器的整体效率。此外，转换器采用的控制技术还能减少健康和故障运行期间的瞬态。保险丝-MOSFET 对用于保护转换器免受短路故障的影响。在连续电流模式（CCM）下分析了拟议的转换器特性，并详细讨论了其在健康和故障运行时的特点。对所提出的转换器进行了设计、制造，并在 100 W 的闭环中进行了实验测试，以验证所设计的控制器在健康和故障运行时的操作性和可行性。
{"title":"High Step-up DC-DC Converter with Reconfiguration Capability","authors":"Krishna Velmajala;Srinivasa Rao Sandepudi","doi":"10.1109/TLA.2024.10738345","DOIUrl":"https://doi.org/10.1109/TLA.2024.10738345","url":null,"abstract":"In this paper a high step-up DC-DC converter is proposed with reconfiguration capability that can operate safely without redundancy even if one of its power electronic switches fails. The proposed converter topology provides continuous input current, reduce voltage stress, uniform current sharing among power electronic switches, common grounding features, and also reduces the power handled by the power electronic devices using alternate paths, thereby improves the converter overall efficiency. Further, the control technique used for the converter reduces the transients during the healthy and fault operations. A fuse-MOSFET pair has been used to protect the converter from short-circuit faults. The proposed converter characteristic is analyzed in the continuous current mode (CCM), and its features are discussed in detail for both healthy and fault operation. The proposed converter was designed, fabricated and experimentally tested in a closed loop at 100 W to verify the operation and feasibility of the controller designed for both healthy and fault operation.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"22 11","pages":"971-982"},"PeriodicalIF":1.3,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10738345","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-29DOI: 10.1109/TLA.2024.10738346
{"title":"Table of Contents November 2024","authors":"","doi":"10.1109/TLA.2024.10738346","DOIUrl":"https://doi.org/10.1109/TLA.2024.10738346","url":null,"abstract":"","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"22 11","pages":"891-891"},"PeriodicalIF":1.3,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10738346","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-25DOI: 10.1109/TLA.2024.10735448
Meisam Mahdavi;Augustine Awaafo;Francisco Jurado
Brazil's and Morocco's energy sectors face a persistent challenge in their heavy reliance on fossil fuel consumption. Brazil is a big consumer of liquefied natural gas (LNG), while Morocco is a big fossil fuel importer. This dependence not only entails substantial import costs for Morocco and high NG liquefaction and transportation expenses for Brazil, but also contributes to elevated carbon emissions. Consequently, Brazil and Morocco are actively exploring substitute resources of renewable power to decrease their dependence on natural fuels and align with global renewable energy targets, including those set forth in agreements like the Kyoto Protocol. Brazil and Morocco boast an abundant array of renewable energy resources, including wind, hydro, solar, and biomass. Leveraging these resources has the potential to swiftly propel these countries towards a low-carbon emissions status when harnessed sustainably for electric power generation. Instead of relying on fossil fuels, the focus of this study is on tapping into the significant potential for power and electricity generation from agricultural residues in Morocco, giving the lessons to Brazilian energy sector for power and electric energy generation form ample agricultural biomass within Brazil. The results show a high potential for energy and electricity generation from cereals, olive biomass, citrus, and date palm residues in Morocco, while cereals, citrus, and sugarcane have better potential for bioenergy and electricity generation in Brazil.
{"title":"Bioenergy and Electric Power Generation from Agricultural Residues in Morocco: Lessons for Brazil","authors":"Meisam Mahdavi;Augustine Awaafo;Francisco Jurado","doi":"10.1109/TLA.2024.10735448","DOIUrl":"https://doi.org/10.1109/TLA.2024.10735448","url":null,"abstract":"Brazil's and Morocco's energy sectors face a persistent challenge in their heavy reliance on fossil fuel consumption. Brazil is a big consumer of liquefied natural gas (LNG), while Morocco is a big fossil fuel importer. This dependence not only entails substantial import costs for Morocco and high NG liquefaction and transportation expenses for Brazil, but also contributes to elevated carbon emissions. Consequently, Brazil and Morocco are actively exploring substitute resources of renewable power to decrease their dependence on natural fuels and align with global renewable energy targets, including those set forth in agreements like the Kyoto Protocol. Brazil and Morocco boast an abundant array of renewable energy resources, including wind, hydro, solar, and biomass. Leveraging these resources has the potential to swiftly propel these countries towards a low-carbon emissions status when harnessed sustainably for electric power generation. Instead of relying on fossil fuels, the focus of this study is on tapping into the significant potential for power and electricity generation from agricultural residues in Morocco, giving the lessons to Brazilian energy sector for power and electric energy generation form ample agricultural biomass within Brazil. The results show a high potential for energy and electricity generation from cereals, olive biomass, citrus, and date palm residues in Morocco, while cereals, citrus, and sugarcane have better potential for bioenergy and electricity generation in Brazil.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"22 11","pages":"952-961"},"PeriodicalIF":1.3,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10735448","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142517912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-25DOI: 10.1109/TLA.2024.10735444
Baba Fakruddin Monakanti;Giridhar Archakam Vijayaraghavulu;Narasimharaju Beeramangalla Lakshminarasiah;Harish Sarma Krishnamoorthy
An ultra high gain quadratic boost converter based on switched-capacitor is proposed in this article. The ultra high gain is achieved with a low duty ratio and a wide range of flexibility. The proposed converter provides significantly reduced device voltage stress and source current ripple. This article presents in detail discussion on the operating principle, continuous conduction mode (CCM) and, discontinuous conduction modes (DCM) and the parasitics effect on the output voltage and efficiency of the proposed converter. Also, the stated converter performance comparison with similar quadratic boost dc-dc converters is presented. The performance indices of the proposed converter are verified by a prototype of 400 V, 50 kHz, 200 W, subsequently, the converter is also experimented for 800 V output with suitable elements to verify its performance feasibility for ultra voltage gain.
本文提出了一种基于开关电容器的超高增益二次升压转换器。超高增益是通过低占空比和大范围的灵活性实现的。该转换器可显著降低器件电压应力和源电流纹波。本文详细讨论了工作原理、连续传导模式（CCM）和不连续传导模式（DCM）以及寄生效应对输出电压和效率的影响。此外，还介绍了所述转换器与类似二次方升压直流-直流转换器的性能比较。拟议转换器的性能指标通过一个 400 V、50 kHz、200 W 的原型进行了验证，随后，该转换器还使用合适的元件进行了 800 V 输出实验，以验证其超电压增益性能的可行性。
{"title":"An Ultra High Gain Switched-Capacitor Boost DC-DC converter with Reduced Ripple Current","authors":"Baba Fakruddin Monakanti;Giridhar Archakam Vijayaraghavulu;Narasimharaju Beeramangalla Lakshminarasiah;Harish Sarma Krishnamoorthy","doi":"10.1109/TLA.2024.10735444","DOIUrl":"https://doi.org/10.1109/TLA.2024.10735444","url":null,"abstract":"An ultra high gain quadratic boost converter based on switched-capacitor is proposed in this article. The ultra high gain is achieved with a low duty ratio and a wide range of flexibility. The proposed converter provides significantly reduced device voltage stress and source current ripple. This article presents in detail discussion on the operating principle, continuous conduction mode (CCM) and, discontinuous conduction modes (DCM) and the parasitics effect on the output voltage and efficiency of the proposed converter. Also, the stated converter performance comparison with similar quadratic boost dc-dc converters is presented. The performance indices of the proposed converter are verified by a prototype of 400 V, 50 kHz, 200 W, subsequently, the converter is also experimented for 800 V output with suitable elements to verify its performance feasibility for ultra voltage gain.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"22 11","pages":"920-932"},"PeriodicalIF":1.3,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10735444","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142517864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-25DOI: 10.1109/TLA.2024.10735447
Jeziel Vazquez;Elías Juan José Rodríguez Segura;Jaime E. Arau Roffiel;Nimrod Vázquez
The modern electric power systems are going through a revolutionary change due the development of DC loads and higher efficiency of DC systems where DC microgrids have some attractive characteristics, however they have several challenges such as limiting and interrupting fault current. In this paper, a protection for DC systems based on transient di/dt detection is proposed to provide faster short-circuit and overcurrent fault detection, where DC breakers are required to be designed for bidirectional fault current conditions, which is a challenge regarding DC microgrid applications due to some associated problems such as long periods of fault interruption, complex circuit structure, and low reliability. The proposal can detect fault current conditions for different distances from the point of failure, and is suitable to operation in both islanding and grid connected conditions. The proposed circuit was analyzed theoretically and experimentally in steady state, as well as under load changes and short circuit conditions to ensure proper operation, making this solution a suitable fast current fault DC breaker solution, which is a significant advantage and requirement in protection of DC systems.
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