Iet Electric Power Applications最新文献

{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"20 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148073924","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}

{"title":"A Five-Level Active Neutral-Point-Clamped Auxiliary Inverter Based on Reverse Blocking IGBT in Metro Applications","authors":"Mingxia Xu,&nbsp;Bowen Yu,&nbsp;Yingying Xu,&nbsp;Rui Li,&nbsp;Jiatao Yang","doi":"10.1049/elp2.70142","DOIUrl":"https://doi.org/10.1049/elp2.70142","url":null,"abstract":"<p>In recent decades, multi-level inverter such as a five-level inverter has gained much attention for its high equivalent switching frequency and low voltage stress. This paper proposes a novel five-level active-neutral-point-clamped converter utilising reverse blocking IGBT (RB-IGBT), targeting auxiliary power supply in high-speed train and metro system. Compared to the conventional five-level inverters, the proposed inverter configuration exhibits lower conduction loss. Unlike the five-level topologies of previous inverters, only two switches are on the current paths in the designed inverter, leading to the reduced conduction loss. Meanwhile, an optimised state machine-based modulation strategy was proposed, which can implement reliable current commutation among adjacent states and maintain flying capacitor voltage balance within multiple carrier cycles. Furthermore, a detailed comparative analysis of loss breakdown and voltage stress characteristics in five-level inverters were presented. Finally, a 27 kVA experimental prototype was built to verify the validity and feasibility of the proposed topology and modulation strategy.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"20 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.70142","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146002048","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}

{"title":"A New Data Augmentation Model for Fault Diagnosis of Transformer Windings Under Scarce Fault Data","authors":"Song Wang,&nbsp;Binyu Zhu,&nbsp;Huan Peng,&nbsp;Jun Liu,&nbsp;Shuhong Wang","doi":"10.1049/elp2.70140","DOIUrl":"https://doi.org/10.1049/elp2.70140","url":null,"abstract":"<p>Deep learning methods for fault diagnosis in transformer windings have drawn growing research interest in recent years. However, the scarcity of FRA fault data limits the application of deep learning in this field. To address this challenge, we propose a data augmentation model based on the diffusion model, namely, CDFF-TW, to generate enough FRA fault data used in the field. First, this study designs a new input data format in the proposed model, which replaces traditional data preprocessing with the direct input of data. Moreover, the forward diffusion process of the proposed model is designed to be reusable, greatly reducing the overall training time compared to traditional diffusion models. Subsequently, a classifier is incorporated into the reverse diffusion process, and a screening component is designed to screen generated data based on the morphological similarity and the resonance peak similarity. Furthermore, a series of comparative tests is conducted. In addition, the model used the CDFF-TW to augment data has better performance compared to existing models in transformer winding fault diagnosis. Finally, the optimal ratio of generated to original data is provided as a guideline for augmenting data in fault diagnosis models using the proposed method.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"20 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.70140","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145891415","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}

{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"20 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148099833","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}

{"title":"Performance Improvement of PMSG-Based Wind Energy Systems via Sensorless FS-Predictive Current Control With MRAS and MPPT-OTC Integration","authors":"Hicham Sayhi,&nbsp;Amor Bourek,&nbsp;Abdelkarim Ammar,&nbsp;Ali Teta,&nbsp;Ahmed Chennana,&nbsp;Abdelaziz Rabehi,&nbsp;Mohamed Benghanem,&nbsp;Takele Ferede Agajie","doi":"10.1049/elp2.70138","DOIUrl":"https://doi.org/10.1049/elp2.70138","url":null,"abstract":"&lt;p&gt;This paper proposes a hybrid sensorless control strategy for a wind energy conversion system (WECS) based on a permanent magnet synchronous generator (PMSG). The approach integrates finite-set predictive current control (FS-PCC), a model reference adaptive system (MRAS) estimator and a maximum power point tracking algorithm based on optimal torque control (MPPT-OTC) to achieve precise current regulation and efficient maximum power extraction without mechanical sensors. The FS-PCC ensures fast and accurate stator current control with minimal ripple, whereas the MRAS provides reliable real-time estimation of rotor speed and position using only current feedback. Experimental validation on a &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mn&gt;3&lt;/mn&gt;\u0000 &lt;mspace&gt;&lt;/mspace&gt;\u0000 &lt;mi&gt;k&lt;/mi&gt;\u0000 &lt;mi&gt;W&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; $3,kW$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; prototype using a &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;d&lt;/mi&gt;\u0000 &lt;mi&gt;S&lt;/mi&gt;\u0000 &lt;mi&gt;P&lt;/mi&gt;\u0000 &lt;mi&gt;A&lt;/mi&gt;\u0000 &lt;mi&gt;C&lt;/mi&gt;\u0000 &lt;mi&gt;E&lt;/mi&gt;\u0000 &lt;mspace&gt;&lt;/mspace&gt;\u0000 &lt;mi&gt;D&lt;/mi&gt;\u0000 &lt;mi&gt;S&lt;/mi&gt;\u0000 &lt;mn&gt;1104&lt;/mn&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; $dSPACE,DS1104$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; controller demonstrates excellent performance, with rotor speed and position estimation errors below &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mn&gt;1&lt;/mn&gt;\u0000 &lt;mo&gt;%&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; $1mathit{%}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;, a &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mn&gt;23&lt;/mn&gt;\u0000 &lt;mo&gt;%&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; $23mathit{%}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; reduction in current ripple and near-perfect electromagnetic torque convergence at &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;−&lt;/mo&gt;\u0000 &lt;mn&gt;5.6&lt;/mn&gt;\u0000 &lt;mspace&gt;&lt;/mspace&gt;\u0000 &lt;mi&gt;N&lt;/mi&gt;\u0000 &lt;mi&gt;m&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${-}5.6,Nm$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; and &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;−&lt;/mo&gt;\u0000 &lt;mn&gt;8.5&lt;/mn&gt;\u0000 &lt;mspace&gt;&lt;/mspace&gt;\u0000 &lt;mi&gt;N&lt;/mi&gt;\u0000 &lt;mi&gt;m&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${-}8.5,Nm$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;, both with less than &lt;s","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"20 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.70138","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145891127","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}

{"title":"A Comparative Investigation of the Performance of Vernier Generators With Open-Slot and Split-Tooth Stator Configurations With a Focus on Improving Torque Ripple and Power Factor","authors":"Omid Maktabdar,&nbsp;Mohammadreza Besmi,&nbsp;Mojtaba Tahani","doi":"10.1049/elp2.70136","DOIUrl":"https://doi.org/10.1049/elp2.70136","url":null,"abstract":"<p>This paper analyses Vernier structures with open-slot and split-tooth stators for generator applications. A comparative evaluation of these structures is conducted in terms of dimensions and materials, and their performance results are compared with each other to identify methods for enhancing voltage regulation, power factor, and cogging torque. Research has demonstrated that, within the framework of an open slot structure, the reduction of self and mutual inductance within each phase has the potential to enhance the power factor. This configuration has been shown to exhibit significantly superior voltage regulation properties in comparison to the alternative structures. Consequently, it may be particularly well-suited for wind turbine generators, where cogging torque and power factor represent two of the primary design considerations. Subsequently, a 200 W sample is constructed and verified with the desired structure. Finally, the performance of the constructed structure is benchmarked against two magnet arrangements, spoke and consequent pole, in terms of cost-effectiveness.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"20 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.70136","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145891109","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}

{"title":"Transformer Capacity Configuration Optimisation Considering Multi-Dimensional Interaction Characteristics of User-Side Resources","authors":"Jinpei Lu,&nbsp;Lei Zhou,&nbsp;Zhilu Liu,&nbsp;Wanzhao He,&nbsp;Peipei Chen,&nbsp;Xue Bai,&nbsp;Congfei Li","doi":"10.1049/elp2.70104","DOIUrl":"10.1049/elp2.70104","url":null,"abstract":"<p>The massive integration of user-side resources such as electric vehicles and photovoltaic, with complex time-series complementary and price response characteristics, has fundamentally changed distribution network structure and imposed new challenges on transformer capacity configuration. Traditional optimisation methods suffer from issues such as transformer overload, capacity redundancy and waste of resources. To resolve above issues, a transformer capacity configuration method considering multidimensional interaction characteristics of user-side resources is proposed. Firstly, a multidimensional interaction model of user-side resources and a hierarchical capacity optimisation architecture of transformers are constructed. Secondly, a hierarchical transformer capacity configuration method is proposed, which consists of a dedicated transformer capacity configuration method based on improved soft actor-critic (SAC) and a public transformer capacity configuration method based on knowledge collaborative multi-agent proximal policy optimisation (MAPPO). Simulation results indicate that compared with the baseline algorithms, the proposed algorithm improves the optimal public transformer capacity by 13.39%, 28.65%, 19.13% and 42.36% and reduces the optimal regulation cost by 2.46%, 5.83%, 3.93% and 7.84%, respectively. Furthermore, it reduces the load deviation variance by 21.05%, 50.49%, 40.73% and 46.74% and decreases the peak-valley load difference by 17.14%, 48.21%, 34.09% and 40.82%, respectively.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"19 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.70104","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145739485","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}

{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"19 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148071120","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}

{"title":"Guest Editorial: Reliability Oriented Electrical Machine Systems: Topology, Design, Monitoring, Diagnostic Techniques, and Control","authors":"Huimin Wang,&nbsp;Yi Zhang,&nbsp;Yun Zuo,&nbsp;Yongheng Yang,&nbsp;Christopher H. T. Lee","doi":"10.1049/elp2.70128","DOIUrl":"10.1049/elp2.70128","url":null,"abstract":"<p>Electrical machines play the role of energy conversion for wind power generation, rail transit systems, electric vehicle traction, and ship propulsion applications. While there has been a steady growth in the use of electrical machine systems, their performance and reliability can become degraded due to the effects of complex operating conditions, which imposes a significant challenge for the applications of electrical machine systems in modern industry. Considering this, new machine topology, optimisation design, condition monitoring methods, and diagnostic techniques as well as control technologies must be developed. In line with the trend of reliable operation of electrical machine system, this Special Issue aims to present state-of-the-art research works on reliability-oriented study of electrical machine systems, including diagnostic techniques, topology, monitoring, and control. Through careful peer reviews and revisions, there are 17 papers accepted for publication in this Special Issue, which have been categorised into four topics, that is, advanced fault diagnosis techniques vibration and noise suppression method, emerging condition monitoring approach, and high-performance sensorless control strategy. The summary of every topic is given below. However, it is strongly encouraged to read the full paper if interested.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"19 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.70128","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145739484","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}

{"title":"Experimental Validation of a Spoke Type Ferrite Permanent Magnet Machine Design for Heavy-Duty Traction Applications","authors":"Marcelo D. Silva,&nbsp;Mila Naghibian,&nbsp;Magnus Jansson,&nbsp;Sandra Eriksson","doi":"10.1049/elp2.70133","DOIUrl":"10.1049/elp2.70133","url":null,"abstract":"<p>Rare earth elements (REEs) are central to the current solutions used for traction applications. However, REEs have fragile supply chains, which exposes them to supply interruptions and price spikes. Research has been focusing on REE-free solutions, either exploring REE-free topologies, such as induction and electromagnetised machines, or investigating the use of alternative hard magnetic materials, such as ferrite permanent magnets (PMs). This paper presents a novel methodology for designing and optimising spoke type permanent magnets synchronous machines (spoke machines) with ferrite PMs. The novelty of the methodology is the unique strategy used to integrate mechanical and demagnetisation constraints. Using this methodology, a novel rotor is optimised using FEM simulations to directly substitute a previous REE-based motor. The optimised design represents a unique rotor, mainly due to its large magnet size, which enables a demagnetisation-safe high-torque motor. A prototype is built and tested to verify the FEM results experimentally. The experimental results show a prototype magnetically resilient to permanent demagnetisation and with higher efficiencies at field weakening when compared with an equivalent REE machine.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"19 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.70133","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145686291","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}