IET Power Electronics最新文献_第5页

An Optimized Loss-Balancing Modulation Strategy for ANPC-3L Inverter ANPC-3L逆变器的损耗平衡调制优化策略

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2025-04-01 DOI: 10.1049/pel2.70029

Kefeng Li, Guijing Xue, Fei Xiao, Jilong Liu, Zhuangzhi Dai, Zhiqin Mai

{"title":"An Optimized Loss-Balancing Modulation Strategy for ANPC-3L Inverter","authors":"Kefeng Li, Guijing Xue, Fei Xiao, Jilong Liu, Zhuangzhi Dai, Zhiqin Mai","doi":"10.1049/pel2.70029","DOIUrl":"https://doi.org/10.1049/pel2.70029","url":null,"abstract":"In existing modulation strategies for active neutral-point-clamped three-level (ANPC-3L) inverters, high-frequency and low-frequency switches are separated, with loss mainly concentrated in some fixed high-frequency operating switches, resulting in uneven loss distribution across switches among bridge arms. To address these issues, a loss-balance optimization modulation strategy is proposed. In this paper, the loss distribution of power switches under different commutation paths is analysed, and a loss-estimation model for switches is established based on the characteristics of power switches to quantify the total losses. Aimed at loss balancing for all power switches, the switching modes (commutation paths) in the modulation process are automatically selected by the proposed strategy, achieving relatively balanced losses among all switches. Experiments are carried out with an 18 kW three-phase ANPC-3L inverter. Compared with existing loss-balance strategies, the proposed strategy shows better loss (temperature) balance performance and almost equal efficiency.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70029","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143741273","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}

引用次数: 0

Pareto-Based Design Optimisation of Hybrid Energy Storage Systems for Full-Electric Vessels 基于pareto的全电动船舶混合储能系统设计优化

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2025-03-29 DOI: 10.1049/pel2.70027

Rene A. Barrera-Cardenas, Salvatore D'Arco, Luigi Piegari, Pietro Tricoli

{"title":"Pareto-Based Design Optimisation of Hybrid Energy Storage Systems for Full-Electric Vessels","authors":"Rene A. Barrera-Cardenas, Salvatore D'Arco, Luigi Piegari, Pietro Tricoli","doi":"10.1049/pel2.70027","DOIUrl":"https://doi.org/10.1049/pel2.70027","url":null,"abstract":"Full electric vessels can benefit from hybrid energy storage systems (HESS) that combine two storage technologies of different characteristics in terms of power and energy density. The optimal design of a HESS for a vessel is generally a rather complex multivariable optimization with several degrees of freedom and constraints. Indeed, the optimization should account for the operational characteristics of the storage units, including their progressive aging. Moreover, the sizing of the storage units is tightly linked to the strategy implemented in the energy management system (EMS) for allocating the power needed by the load to the storage units. This paper presents a two-stage Pareto-based design optimization procedure for HESS intended for a full-electric vessel. The methodology first identifies a Pareto front as the set of all the optimal configurations in terms of capacity of the two storage units that fulfil the operational constraints within a large discrete configuration space. These constraints account for capacity degradation and limitations in power and energy. The degrees of freedom in the EMS are included in the configuration space. A second stage identifies the optimal configuration on the Pareto front based on a defined cost function. The approach decouples the analysis of the solutions that can fulfil the operational constraints from the optimization and can be very effective in exploring the effect of several alternative cost functions on the optimal solution. Moreover, the shape of the Pareto front can offer a visual clue to the benefits offered by a hybrid storage compared to a single technology solution and on the optimization margins. The procedure is illustrated with a case of a full electric tugboat highlighting when a HESS can be beneficial and how the optimal design can be facilitated.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70027","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143726793","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}

引用次数: 0

FEA-Based Optimisation of an Inserted-Shunt Integrated Planar Transformer for a Bidirectional CLLLC Resonant Converter 双向CLLLC谐振变换器插入并联集成平面变压器的有限元优化

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2025-03-29 DOI: 10.1049/pel2.70014

Sajad A. Ansari, Jonathan N. Davidson, Martin P. Foster

引用次数: 0

Optimized Phase-shift Tuning via Equivalent Small Parameter Modeling for Ripple Reduction in Asymmetric Parallel Multi-Module DC-DC Converters 基于等效小参数建模的非对称并联多模块DC-DC变换器纹波抑制优化相移调谐

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2025-03-26 DOI: 10.1049/pel2.70025

Xiuyun Zhang, Guidong Zhang, Samson S. Yu, Zhenyu Yi

{"title":"Optimized Phase-shift Tuning via Equivalent Small Parameter Modeling for Ripple Reduction in Asymmetric Parallel Multi-Module DC-DC Converters","authors":"Xiuyun Zhang, Guidong Zhang, Samson S. Yu, Zhenyu Yi","doi":"10.1049/pel2.70025","DOIUrl":"https://doi.org/10.1049/pel2.70025","url":null,"abstract":"In photovoltaic power generation applications, multiple low-voltage PV modules must be boosted and connected in parallel for high power output. However, due to the variability of PV energy input, the parallel DC-DC converter modules often operate under asymmetric conditions, which deteriorates bus voltage ripple and reduces system stability and component lifespan. To address these issues, this paper proposes an optimal phase-shift modulation method with asymmetric phase shifts to effectively suppress the ripples at the point of common coupling of parallel-connected converters. To do so, a model for the output voltage ripple of boost and buck–boost parallel converter is established using the equivalent small parameter method (ESPM) with the optimal phase-shift angle determined by this modulation approach. Furthermore, a triple-loop current-sharing control strategy is implemented to ensure current sharing among the modules, enhancing the overall ripple suppression capability of the proposed modulation technique. Simulation and experimental results indicate that this integrated approach significantly improves the performance and stability of parallel converter systems.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70025","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707266","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}

引用次数: 0

A Combined Compensation Strategy for Steady-State Performance Improvement of Proportional-Proportional-Delay Controller 一种提高比例-比例-延迟控制器稳态性能的组合补偿策略

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2025-03-26 DOI: 10.1049/pel2.70022

Di Wu, Yan Fu, Mingming Li, Luoming OuYang

{"title":"A Combined Compensation Strategy for Steady-State Performance Improvement of Proportional-Proportional-Delay Controller","authors":"Di Wu, Yan Fu, Mingming Li, Luoming OuYang","doi":"10.1049/pel2.70022","DOIUrl":"https://doi.org/10.1049/pel2.70022","url":null,"abstract":"Within control system architectures, the proportional-proportional-delay (PPD) controller is theoretically characterized by enhanced dynamic responsiveness, a streamlined control structure, and reduced computational demands. Nevertheless, this control strategy demonstrates heightened dependence on system model accuracy coupled with compromised robustness, thus imposing significant constraints on its practical deployment in industrial control scenarios. To improve steady-state control performance of the PPD controller against circuit parameters variations, this paper investigates quantity relationships between circuit parameters variations and grid current amplitude changes first, and a dominant factor and some minor factors affecting the grid current are found out successfully. As a result, linear control of the PPD controller against model parameters changes has been proposed based on a linear function. Meanwhile, an integral controller composed has been integrated into the control strategy to eliminate the residual steady-state error of the proposed linear controller. Finally, a combined control structure with both linear and integral controllers has been proposed, and experimental results have been presented to verify the correctness and effectiveness of the combined control.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70022","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698911","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}

引用次数: 0

Finite Control Set Model Predictive Control Strategy for MMC Arm Current With DC Bus Voltage Stabilization Under Unbalanced Grid Conditions 电网不平衡条件下具有直流母线稳压的MMC臂电流有限控制集模型预测控制策略

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2025-03-19 DOI: 10.1049/pel2.70023

Xiaobing Niu, Runze Qiu, Jingwei Zhu, Xin Chow

引用次数: 0

Control Strategy for Modular-Structured Series-Resonant Converters: Unifying Pulse-Density Modulation and Phase-Shift Control 模块化结构串联谐振变换器的控制策略：统一脉冲密度调制和相移控制

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2025-03-13 DOI: 10.1049/pel2.70020

Pavlo Herasymenko, Sergii Usenko, Bogdan Yarmolenko, Viktor Gurin

{"title":"Control Strategy for Modular-Structured Series-Resonant Converters: Unifying Pulse-Density Modulation and Phase-Shift Control","authors":"Pavlo Herasymenko, Sergii Usenko, Bogdan Yarmolenko, Viktor Gurin","doi":"10.1049/pel2.70020","DOIUrl":"https://doi.org/10.1049/pel2.70020","url":null,"abstract":"The study proposes an advanced control technique for modular-structured series-resonant converters, unifying pulse-density modulation (PDM) and phase-shift control to mitigate output current amplitude fluctuations. Series-resonant converters, widely utilised for their efficiency in various applications, typically employ PDM to achieve zero-voltage and quasi-zero-current switching, minimising switching losses. However, these converters often encounter challenges with amplitude fluctuations in the output current, particularly during deep current regulation, which can compromise performance and lead to increased electromagnetic interference and overvoltage issues. The presented control strategy combines PDM with phase-shift control, significantly reducing these fluctuations and maintaining higher minimum peak currents. This unified approach ensures greater stability and efficiency in the converter's operation. Detailed experimental validation confirms the theoretical benefits, highlighting the proposed method's superiority over traditional PDM control techniques in achieving stable and efficient converter performance.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70020","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143602627","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}

引用次数: 0

An Expandable Buck-Boost AC–AC Converter With Few Components, Wide Step-Down Conversion Ratio, Continuous Input Current and Common-Ground 一种元件少、宽降压比、连续输入电流和共地的可扩展Buck-Boost交流-交流变换器

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2025-03-11 DOI: 10.1049/pel2.70019

Iman Abdoli, Alireza Lahooti Eshkevari, Hafiz Furqan Ahmed, Mohammad Arasteh

{"title":"An Expandable Buck-Boost AC–AC Converter With Few Components, Wide Step-Down Conversion Ratio, Continuous Input Current and Common-Ground","authors":"Iman Abdoli, Alireza Lahooti Eshkevari, Hafiz Furqan Ahmed, Mohammad Arasteh","doi":"10.1049/pel2.70019","DOIUrl":"https://doi.org/10.1049/pel2.70019","url":null,"abstract":"This paper proposes a new non-isolated single-phase buck-boost AC–AC converter with a reduced number of active and passive components and an improved buck-boost conversion ratio. The extension of the proposed circuit is also presented, which can generate a symmetric-bipolar buck-boost voltage. The converter achieves a wide step-down operating area due to the appropriate use of a coupled inductor, where small duty ratios are needed to obtain low step-down conversion ratios. This not only improves the efficiency but is also ideal for mitigating deep voltage sag/swell in applications such as a dynamic voltage restorer (DVR). Two out of four power switches used operate at high frequency in each input voltage half-cycle, while the other switches ensure safe commutation, which significantly reduces the switching losses compared to similar circuits. In addition, the topology has better total switch voltage stress (TSV) and switching device power (SDP) indexes than its competitors. The total volume of magnetic elements has also been improved. The converter ensures input current continuity using an input inductor and eliminates the need for additional harmonic filters. Due to its common-ground feature, a bulky line-frequency transformer can be eliminated when used in series with loads in applications such as a DVR. This article explains the operating principle of the proposed topology and evaluates its performance using a hardware prototype. Results verify the converter's operation and its superior features.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70019","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143594936","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}

引用次数: 0

Study on Amplitude and Frequency Characteristics of Magnetic Flux in Three-Dimensional Wound Core Transformer 三维绕线铁心变压器磁通幅频特性研究

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2025-03-10 DOI: 10.1049/pel2.70021

Z. H. Su, L. F. Luo, D. Z. Chen

{"title":"Study on Amplitude and Frequency Characteristics of Magnetic Flux in Three-Dimensional Wound Core Transformer","authors":"Z. H. Su, L. F. Luo, D. Z. Chen","doi":"10.1049/pel2.70021","DOIUrl":"https://doi.org/10.1049/pel2.70021","url":null,"abstract":"In order to deeply study the mathematical model and amplitude-frequency characteristics of the split-frame flux and composite flux of a three-dimensional wound core transformer. Firstly, based on the phasor relationship between the composite flux and the split-frame flux, this paper obtains the constraint equation between the composite flux and the split-frame flux. Based on Ohm's law for magnetic circuits, the constraint equation between the three-phase frame fluxes are derived, and the analytical solution of each split-frame flux is obtained by solving it. Secondly, combined with the characteristics that the flux distribution in the magnetic circuit always realizes the minimum magnetic resistance, starting from the relationship between the harmonic content, initial phase angle and the amplitude of the composite flux in the analytical solution of the split-frame flux, a calculation method for the harmonic content of the split-frame flux and the amplitude of the composite flux of a three-dimensional wound core transformer based on the multivariate function method is proposed. The harmonic content of the split-frame flux and the amplitude of the composite flux under excitation of an infinite power system and a small power system is clarified, and its typical applications are discussed. Finally, a test platform for a three-dimensional wound core transformer capable of realizing the presence or absence of zero-sequence flux components in each frame flux is built and relevant tests are carried out to verify the correctness of the proposed method.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70021","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143594875","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}

引用次数: 0

Development and Research of a New Bidirectional Extended Gain DC–DC Topology with Modularity and Continuous Current 具有模块化和连续电流的新型双向扩展增益DC-DC拓扑的开发与研究

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2025-03-06 DOI: 10.1049/pel2.70017

Mohamad Reza Banaei, Mohamad Golmohamadi, Hadi Afsharirad

{"title":"Development and Research of a New Bidirectional Extended Gain DC–DC Topology with Modularity and Continuous Current","authors":"Mohamad Reza Banaei, Mohamad Golmohamadi, Hadi Afsharirad","doi":"10.1049/pel2.70017","DOIUrl":"https://doi.org/10.1049/pel2.70017","url":null,"abstract":"A new high-gain modular bidirectional DC-DC converter (BDC) is proposed in this paper, designed to facilitate energy transfer between the high- and low-voltage sides of a DC microgrid. In these applications, the low-voltage side typically consists of an energy storage system, such as lithium-ion battery structures. A step-up DC-DC converter is used to connect other sources, such as photovoltaic panels (PVs) or fuel cells, to the grid, delivering a DC voltage of approximately 300 to 500 volts on the high-voltage side. The proposed converter achieves a high voltage gain by operating in boost mode, utilising an extended quadratic boost ratio. Additionally, in buck mode, the converter can function either as a standard buck converter or as a quadratic buck converter. Furthermore, the low-voltage side of the converter features an inductor, which ensures continuous input current, eliminating the need for additional filters. Furthermore, the converter can be extended by the modular features, and the output voltage gain can be greatly increased. It should be noted that only one power switch is used for the voltage boost state, and the extra modules just include the passive elements. For this converter, the mathematical analysis has been accomplished, and the MATLAB Simulink and experimental results have been considered for a 200-W prototype of the proposed converter to prove its operability.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70017","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143564721","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}

引用次数: 0