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Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering最新文献

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A Grid Frequency and Voltage Agnostic Startup Technique for Cascaded H-bridge Converters 级联h桥变换器的电网频率电压不可知启动技术
IF 0.7 4区 工程技术
Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering Pub Date : 2023-06-25 DOI: 10.1109/COMPEL52896.2023.10220440
R. Mallik, B. Johnson
{"title":"A Grid Frequency and Voltage Agnostic Startup Technique for Cascaded H-bridge Converters","authors":"R. Mallik, B. Johnson","doi":"10.1109/COMPEL52896.2023.10220440","DOIUrl":"https://doi.org/10.1109/COMPEL52896.2023.10220440","url":null,"abstract":"This paper presents a decentralized startup technique for bidirectional series-connected inverters with grid-forming capability. We control each converter module as a virtual resistor that absorbs power from the grid and transfers energy to the dc side. Owing to the passive nature of the virtual resistors, the series ac-side current automatically synchronizes the cascaded ac-side module voltages to the grid voltage. The virtual resistors not only prevent over-currents, but they are also agnostic to changes in grid frequency and voltage. This is extremely useful for startup during off-nominal grid conditions. Furthermore, unlike existing grid-connected startup methods, this technique does not require external charging resistors or a centralized phase-locked loop (PLL) to synchronize the series-connected modules. We demonstrate that stable rectifier operation is achieved if the emulated resistances are lower than a critical value. Once steady-state operation is reached, a local decentralized PLL within each module is able to decipher the frequency, phase angle, and magnitude of the grid voltage. This information is then passed to the primary control (droop, virtual oscillator, or virtual synchronous machine) and we flip the direction of power flow as the system begins normal operation. We verify the proposed startup technique for a 1.5 kVA system with three cascaded converters connected across a grid.","PeriodicalId":55233,"journal":{"name":"Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering","volume":"1 1","pages":"1-8"},"PeriodicalIF":0.7,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90291026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Solid State Transformer for Electric Power Grid HEMP/GMD Mitigation 用于电网HEMP/GMD缓解的固态变压器
IF 0.7 4区 工程技术
Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering Pub Date : 2023-06-25 DOI: 10.1109/COMPEL52896.2023.10220979
T. Donnelly, L. Rashkin
{"title":"A Solid State Transformer for Electric Power Grid HEMP/GMD Mitigation","authors":"T. Donnelly, L. Rashkin","doi":"10.1109/COMPEL52896.2023.10220979","DOIUrl":"https://doi.org/10.1109/COMPEL52896.2023.10220979","url":null,"abstract":"A high altitude electromagnetic pulse (HEMP) or other similar geomagnetic disturbance (GMD) has the potential to severely impact the operation of large-scale electric power grids. By introducing low-frequency common-mode (CM) currents, these events can impact the performance of key system components such as large power transformers. In this work, a solid-state transformer (SST) that can replace susceptible equipment and improve grid resiliency by safely absorbing these CM insults is described. An overview of the proposed SST power electronics and controls architecture is provided, a system model is developed, and the performance of the SST in response to a simulated CM insult is evaluated. Compared to a conventional magnetic transformer, the SST is found to recover quickly from the insult while maintaining nominal ac input/output behavior.","PeriodicalId":55233,"journal":{"name":"Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering","volume":"611 1","pages":"1-6"},"PeriodicalIF":0.7,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77353997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modulation Improvements for High Phase-Count Series-Capacitor Buck Converters 高相数串联电容降压变换器的调制改进
IF 0.7 4区 工程技术
Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering Pub Date : 2023-06-25 DOI: 10.1109/COMPEL52896.2023.10220443
Gianluca Roberts, A. Prodic
{"title":"Modulation Improvements for High Phase-Count Series-Capacitor Buck Converters","authors":"Gianluca Roberts, A. Prodic","doi":"10.1109/COMPEL52896.2023.10220443","DOIUrl":"https://doi.org/10.1109/COMPEL52896.2023.10220443","url":null,"abstract":"This paper presents various phase activation sequences which raise the maximum input-to-output voltage conversion ratio of an N-inductor, N-phase Series-Capacitor (SerC) Buck Converter beyond the traditional limit of $1/N^{2}$. Phase counts up to 16 are analysed with conversion ratios increasing by a factor of up to 7. This paper additionally introduces a modulation technique that effectively increases the DPWM output voltage resolution by a factor of N by employing a novel method of minor duty increments (MDI). An experimental discrete prototype of an 11-phase, 48V–1.0VSerC Buck was fabricated to validate both the increase in the output voltage ceiling and DPWM resolution, as well as to evaluate the MDI-DPWM output voltage linearity.","PeriodicalId":55233,"journal":{"name":"Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering","volume":"116 1","pages":"1-8"},"PeriodicalIF":0.7,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74518571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Piezoelectric Transformer Component Design for DC-DC Power Conversion DC-DC电源转换用压电变压器元件设计
IF 0.7 4区 工程技术
Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering Pub Date : 2023-06-25 DOI: 10.1109/COMPEL52896.2023.10221050
E. Ng, J. D. Boles, J. Lang, D. Perreault
{"title":"Piezoelectric Transformer Component Design for DC-DC Power Conversion","authors":"E. Ng, J. D. Boles, J. Lang, D. Perreault","doi":"10.1109/COMPEL52896.2023.10221050","DOIUrl":"https://doi.org/10.1109/COMPEL52896.2023.10221050","url":null,"abstract":"Piezoelectric transformers (PTs) are a promising energy storage alternative to magnetics for power converter miniaturization. PTs offer galvanic isolation and voltage transformation like traditional magnetic transformers, but with superior power scaling properties at small size scales. Despite these advantages, most magnetic-less PT-based dc-dc converter designs have limited efficiencies and power densities. In this paper, we present a design framework for PTs that enables high efficiency and energy handling density at a nominal operating point, while maintaining high-efficiency converter behaviors such as zero voltage switching (ZVS). We illustrate this design process in the context of dc-dc power conversion, and the result suggests that significant gains in PT performance are possible with existing materials using these design strategies.","PeriodicalId":55233,"journal":{"name":"Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering","volume":"14 1","pages":"1-8"},"PeriodicalIF":0.7,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86061922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Voltage-power Relationship for DRU-HVDC Connected OWF System 药-高压直流连接OWF系统的电压-功率关系
IF 0.7 4区 工程技术
Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering Pub Date : 2023-06-25 DOI: 10.1109/COMPEL52896.2023.10221145
Chengqi Zhang, Dongsheng Yang, Han Mu
{"title":"Voltage-power Relationship for DRU-HVDC Connected OWF System","authors":"Chengqi Zhang, Dongsheng Yang, Han Mu","doi":"10.1109/COMPEL52896.2023.10221145","DOIUrl":"https://doi.org/10.1109/COMPEL52896.2023.10221145","url":null,"abstract":"In order to pair control variables following the system properties for designing grid-forming wind turbines in the diode rectifier unit(DRU)- high-voltage direct current(HVDC) connected offshore wind farm (OWF) with controlled hydrogen electrolysis and small grid connection onshore, both steady-state and small-signal relationship between voltage at the OWF and power transmitted to DRU-HVDC have to be clearly understood. However, apart from uncontrolled nature of DRU, interface constituting by passive devices between OWF and the offshore platform impact the voltage-power relationships as well. To including physical properties of DRU to the AC circuit analysis, chain rule is implemented to bridge the voltage at point of common connection (PCC) and the OWF, reflecting the voltage divider role of MVAC cables, DRU filters and reactive power compensation devices.The research work reveals large gain between the voltage magnitude of OWF and power transmitted to HVDC link, while adjusting frequency hardly affect the power, which are different from voltage-power relationship in conventional power systems. The rigorous analytical results are verified by PSCAD/EMT simulation.","PeriodicalId":55233,"journal":{"name":"Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering","volume":"13 2 1","pages":"1-7"},"PeriodicalIF":0.7,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81220946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
48V to 1V Active-Clamp Stacked Direct Forward Converter 48V到1V有源箝位堆叠直接正激变换器
IF 0.7 4区 工程技术
Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering Pub Date : 2023-06-25 DOI: 10.1109/COMPEL52896.2023.10221063
Shivangi Sinha, Branko Majmunović, D. Maksimović
{"title":"48V to 1V Active-Clamp Stacked Direct Forward Converter","authors":"Shivangi Sinha, Branko Majmunović, D. Maksimović","doi":"10.1109/COMPEL52896.2023.10221063","DOIUrl":"https://doi.org/10.1109/COMPEL52896.2023.10221063","url":null,"abstract":"This paper presents a 4S V-to-1 V stacked direct forward (SDF) dc-dc converter consisting of four 12 V-to-1 V direct forward (DF) modules connected in input-series output-parallel (ISOP) configuration. In each DF module, there is no secondary-side filter inductor, and a single-ended forward transformer is driven at a high duty cycle to reduce the switch root-mean-square currents. An active clamp is employed on the primary side to reset the transformer, limit the switch voltage stress, and facilitate zero voltage switching. The approach is verified by simulation results on a 12 V-to-1V, 50A, 200kHz prototype module using GaN devices and a planar transformer, and having a peak predicted efficiency of 93.4% and the full-load predicted efficiency of 89.3%. Experimental results are presented for a 12 V-to-1 V DF prototype.","PeriodicalId":55233,"journal":{"name":"Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering","volume":"47 1","pages":"1-8"},"PeriodicalIF":0.7,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72532479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Improved Burst Mode Operation for DAB Converters to Achieve ZVS in Full-Load-Range by Considering Device Voltage Oscillation 考虑器件电压振荡的DAB变换器实现全负载范围ZVS的改进突发模式操作
IF 0.7 4区 工程技术
Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering Pub Date : 2023-06-25 DOI: 10.1109/COMPEL52896.2023.10221120
Cheng Huang, Tomoyuki Mannen, T. Isobe
{"title":"Improved Burst Mode Operation for DAB Converters to Achieve ZVS in Full-Load-Range by Considering Device Voltage Oscillation","authors":"Cheng Huang, Tomoyuki Mannen, T. Isobe","doi":"10.1109/COMPEL52896.2023.10221120","DOIUrl":"https://doi.org/10.1109/COMPEL52896.2023.10221120","url":null,"abstract":"This paper proposes an improved burst mode for dual active bridge (DAB) converters to obtain zero-voltage switching (ZVS) operation over the entire load range. Despite the burst mode can reduce the number of switching and improve the efficiency by introducing non-switching intervals, the conventional burst mode operations fail in the realization of ZVS over the entire load range. The proposed method introduces an oscillation of device voltages which can be resonant to zero during the non-switching interval of the burst mode. The oscillation period is discretely adjusted so that the switching devices can always be turned on at zero voltage even at light-load conditions. As a result, further efficiency improvement can be obtained in the entire load condition with an extended ZVS range. The effectiveness of the proposed method was verified by experiments with a fabricated DAB converter, which consisted of SiC-MOSFETs and was operated at 100-kHz.","PeriodicalId":55233,"journal":{"name":"Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering","volume":"138 1","pages":"1-7"},"PeriodicalIF":0.7,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89322082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
A Flexible Lightweight 7.4 V Input 300 V to 1500 V Output Power Converter for an Untethered Modular Piezoelectric Soft Robot 柔性轻量级7.4 V输入300v至1500v输出功率转换器用于无系绳模块化压电软机器人
IF 0.7 4区 工程技术
Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering Pub Date : 2023-06-25 DOI: 10.1109/COMPEL52896.2023.10221022
Hsin Cheng, Zhiwu Zheng, Prakhar Kumar, Yenan Chen, J. Baek, Ben Kim, Sigurd Wagner, N. Verma, J. Sturm, Minjie Chen
{"title":"A Flexible Lightweight 7.4 V Input 300 V to 1500 V Output Power Converter for an Untethered Modular Piezoelectric Soft Robot","authors":"Hsin Cheng, Zhiwu Zheng, Prakhar Kumar, Yenan Chen, J. Baek, Ben Kim, Sigurd Wagner, N. Verma, J. Sturm, Minjie Chen","doi":"10.1109/COMPEL52896.2023.10221022","DOIUrl":"https://doi.org/10.1109/COMPEL52896.2023.10221022","url":null,"abstract":"Soft robot is an enabling technology for many emerging applications. The operation voltages of many electric soft actuators, i.e., Macro Fiber Composites (MFC) and Dielectric Elastomer Actuators (DEA), are usually in the range of hundreds to thousands of volts. Actuators in a soft robot often need to be coordinated efficiently, precisely or rapidly, to perform useful functions such as crawling, jumping, or swimming. This paper presents the design and implementation of a flexible, lightweight, and modular power converter for multi-actuator piezoelectric soft robots. Output pulses of 300 V to 1500 V, 1 W, can be generated from 7.4 V input voltage with less than 5g of power electronics weight. A fully untethered, modular, scalable soft robot platform enables new opportunities for hardware, software, power, and control co-design.","PeriodicalId":55233,"journal":{"name":"Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering","volume":"95 1","pages":"1-7"},"PeriodicalIF":0.7,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84400480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Framework for Optimizing Multilevel AC Battery Energy Storage Systems 多级交流电池储能系统的优化框架
IF 0.7 4区 工程技术
Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering Pub Date : 2023-06-25 DOI: 10.1109/COMPEL52896.2023.10220997
Alireza Ramyar, Jason B. Siegel, A. Avestruz
{"title":"A Framework for Optimizing Multilevel AC Battery Energy Storage Systems","authors":"Alireza Ramyar, Jason B. Siegel, A. Avestruz","doi":"10.1109/COMPEL52896.2023.10220997","DOIUrl":"https://doi.org/10.1109/COMPEL52896.2023.10220997","url":null,"abstract":"Battery energy storage systems (BESS) play an essential role in modern grids by supporting renewable power systems, improving grid power quality through voltage and frequency regulation, and supporting electric vehicle (EV) charging stations. At the same time, and with the rapid growth of EVs, an enormous number of EV batteries will be retired soon. These second-use EV batteries still have approximately 80% capacity and can be utilized in stationary applications like grid-connected BESSs to reduce the emissions from producing new batteries for energy storage systems. Directly producing multilevel AC from batteries reduces cost by eliminating the need for an explicit conventional inverter. In this paper, a framework is presented for optimizing the multilevel integration of power processing in BESSs, which is particularly applicable to BESSs with heterogeneous second-use batteries.","PeriodicalId":55233,"journal":{"name":"Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering","volume":"23 1","pages":"1-8"},"PeriodicalIF":0.7,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85030028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fault-tolerant magnetic coupling topology for network parallel multilevel inverters 网络并联多电平逆变器的容错磁耦合拓扑
IF 0.7 4区 工程技术
Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering Pub Date : 2023-06-25 DOI: 10.1109/COMPEL52896.2023.10221155
Mattar Rita, A. Marwan
{"title":"Fault-tolerant magnetic coupling topology for network parallel multilevel inverters","authors":"Mattar Rita, A. Marwan","doi":"10.1109/COMPEL52896.2023.10221155","DOIUrl":"https://doi.org/10.1109/COMPEL52896.2023.10221155","url":null,"abstract":"This paper presents a study of a fault-tolerant magnetic coupling topology for a network parallel multilevel inverter in aircraft applications. The modeling, the sizing, and the design of the Secondary Loop topology are developed for 15 kW/phase. Then, the experimental results are compared to the simulations in an open-loop study. For the closed-loop study, a linear dynamic model of the inverter is discussed to ensure the balancing of the leg currents. Finally, this topology is tested in terms of fault tolerance due to the loss of a leg, in open loop and in closed-loop control, showing promising results.","PeriodicalId":55233,"journal":{"name":"Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering","volume":"21 1","pages":"1-7"},"PeriodicalIF":0.7,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80735191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","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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