Iet Electric Power Applications最新文献_第10页

Thermal analysis and temperature evaluation on a magnetic-geared dual-rotor machine 磁齿轮双转子机器的热分析和温度评估

IF 1.7 4区工程技术

Iet Electric Power Applications Pub Date : 2024-01-08 DOI: 10.1049/elp2.12414

Minghao Tong, Xiaoqiang Liu, Le Sun

{"title":"Thermal analysis and temperature evaluation on a magnetic-geared dual-rotor machine","authors":"Minghao Tong, Xiaoqiang Liu, Le Sun","doi":"10.1049/elp2.12414","DOIUrl":"10.1049/elp2.12414","url":null,"abstract":"The thermal performance of the magnetic-geared dual-rotor machine (MGDRM) is investigated. Because the effective component in the outer airgap magnetic field harmonics is low, the torque production of MGDRM cannot match the regular permanent magnetic synchronous machine (PMSM). Although the analysis shows that the torque generation of the MGDRM is weak, this conclusion is limited in the electromagnetic field. The MGDRM outer rotor should also be considered from the thermal aspect, and the effect on the torque generation should be valued in particular. The outer rotor thermal buffer effect blocks the heating flow from the winding to the inner rotor magnets. Thus, the MGDRM can withstand a heavy electrical load in a short period, producing higher torque. With this understanding, the torque production ability of the MGDRM can extend to a higher level, even close to the regular PMSM. To validate the analysis, a MGDRM machine is prototyped, and the dual-rotor temperature information acquisition is realised by a wireless data collection. The rotor temperature estimation technology on the dual-rotor is then investigated as an auxiliary function. The estimation error can be limited around 5°C, which is good for warning the thermal risk. And thus the MGDRM overheating can be safely adopted to extend the torque generation.","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"18 5","pages":"594-607"},"PeriodicalIF":1.7,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12414","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139448242","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

Application and analysis of superconducting magnetic eddy current heater used in wind thermal power generation system 风力热发电系统中使用的超导磁涡流加热器的应用与分析

IF 1.7 4区工程技术

Iet Electric Power Applications Pub Date : 2024-01-08 DOI: 10.1049/elp2.12416

Wenfeng Zhang, Chen Chen, Zeyuan Liu, Youhua Wang, Chengcheng Liu

{"title":"Application and analysis of superconducting magnetic eddy current heater used in wind thermal power generation system","authors":"Wenfeng Zhang, Chen Chen, Zeyuan Liu, Youhua Wang, Chengcheng Liu","doi":"10.1049/elp2.12416","DOIUrl":"10.1049/elp2.12416","url":null,"abstract":"In order to cope with the grid fluctuation caused by large-scale wind power connected to the grid, the wind thermal power generation system has been proposed and extensively studied. The wind thermal power generation system uses a wind turbine to drive a heat generation device to heat the heat storage medium, which is further exchanged to drive a turbine to generate electricity. A superconducting magnetic eddy current heater (SMH) is proposed for the characteristics of wind thermal power generation system, which uses non-resistive, large current-carrying superconducting coils for excitation, and has high output efficiency and power density. The working principle of magnetic eddy current heating is analysed, and the structure of SMH with no ferromagnetic material and two heating screens inside and outside is proposed according to the characteristics of SMH. An analytical model of the SMH is established, and the influence of the structure and materials of the SMH on the magnetic field distribution is analysed. Based on this, a 22-pole SMH was designed and analysed for output power at 10–20 rpm. A three-dimensional magnetism-stress combined analysis model of SMH is established, and the strain and stress characteristics of SMH are simulated under the condition of maximum output power, which verifies the feasibility of the mechanical properties of existing superconducting materials for application in SMH.","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"18 6","pages":"668-680"},"PeriodicalIF":1.7,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12416","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139445780","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 new air gap flux-based technique to detect loss of field in synchronous generators 基于气隙磁通量的同步发电机失磁检测新技术

IF 1.7 4区工程技术

Iet Electric Power Applications Pub Date : 2024-01-02 DOI: 10.1049/elp2.12410

Mohammad Reza Haseli, Farhad Haghjoo, Abbas Hasani

引用次数: 0

Current harmonic suppression strategy for permanent magnet synchronous motor based on small phase angle resonant controller 基于小相角谐振控制器的永磁同步电机电流谐波抑制策略

IF 1.7 4区工程技术

Iet Electric Power Applications Pub Date : 2023-12-29 DOI: 10.1049/elp2.12411

Fang Xie, Jinhu Xu, Mengyuan Shen, Ziang Zheng

引用次数: 0

A modified approach for efficient cogging torque suppression in a flux switching permanent magnet generator used in micro-scale wind turbines 用于微型风力涡轮机的磁通开关永磁发电机高效抑制齿槽转矩的改进方法

IF 1.7 4区工程技术

Iet Electric Power Applications Pub Date : 2023-12-29 DOI: 10.1049/elp2.12412

Amir Darjazini, Abolfazl Vahedi, Saber Gharehseyed, Amin Nobahari

{"title":"A modified approach for efficient cogging torque suppression in a flux switching permanent magnet generator used in micro-scale wind turbines","authors":"Amir Darjazini, Abolfazl Vahedi, Saber Gharehseyed, Amin Nobahari","doi":"10.1049/elp2.12412","DOIUrl":"10.1049/elp2.12412","url":null,"abstract":"In recent years, Flux Switching Permanent Magnet (FSPM) machines have attracted notable attention in direct drive, low speed, and high torque density applications such as wind turbines. However, their relatively high cogging torque has been identified as a significant challenge for such applications primarily because of its effects on both starting and running performance of the wind turbines. The authors, therefore, aim to present a modified approach that can improve the cogging torque issue and eliminate the weaknesses of the previously introduced designs. To reach this goal, first, an operating point is chosen for the studied machine regarding the available small-scale turbines in the market. Then, the potential benefits of combining different cogging torque reduction schemes are investigated thorough the proposed method. This is intended to be done on the rotor teeth without imposing any complications or extra costs. The results show that a simultaneous improvement in the cogging torque and the energy conversion capability of the machine could be achieved through this cost-effective approach. To end with, the sensitivity of the best cases to the expected manufacturing tolerances is investigated. All analyses are performed via two-dimensional finite-element (2D-FE) models, the accuracy of which has been pre-certified through experimental measurement.","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"18 5","pages":"565-581"},"PeriodicalIF":1.7,"publicationDate":"2023-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12412","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139147565","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 new three-level simplified sparce NPC topology for UHS PMSM motor applications 适用于 UHS PMSM 电机应用的新型三电平简化稀疏 NPC 拓扑

IF 1.7 4区工程技术

Iet Electric Power Applications Pub Date : 2023-12-22 DOI: 10.1049/elp2.12405

Aleksandr Sheianov, Xi Xiao, Xudong Sun

{"title":"A new three-level simplified sparce NPC topology for UHS PMSM motor applications","authors":"Aleksandr Sheianov, Xi Xiao, Xudong Sun","doi":"10.1049/elp2.12405","DOIUrl":"10.1049/elp2.12405","url":null,"abstract":"In ultra-high speed (UHS) motor applications, full SIC two-level (2L) inverters with high switching frequencies are generally used due to their lower cost. However, even with the usage of all WBG power devices, high-frequency hard-switched 2L inverters still do not achieve optimal efficiency characteristics. As a result, in order to simultaneously reduce the switching frequency and enhance overall efficiency, recently three-level (3L) topologies have emerged as a promising solution. Nevertheless, to fully meet the requirements of UHS applications, the switching frequency of 3L inverters should be increased beyond 30 kHz, which necessitates the usage of all SIC power devices. This, in turn, leads to a potential drawback where the cost of the drive system may become prohibitively high due to the requirement of all SIC switches. To address this issue and reduce the cost of a full SIC 3L inverter, a new 3L simplified sparse NPC (SSNPC) topology is proposed in this work. The operational principle of this topology, its distinctive control features, and the advantages it offers specifically for UHS applications are presented. Additionally, to further increase the efficiency and reduce the influence of dead time at low speeds, a new switching sequence is introduced. Finally, the overall performance and efficiency characteristics of the high-frequency SSNPC inverter were verified across all operational conditions of UHS motor drive system.","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"18 4","pages":"458-476"},"PeriodicalIF":1.7,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12405","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139163938","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

Assessing the moisture content of oil-impregnated paper bushings with a simple and fast method 用简单快速的方法评估油浸纸衬套的含水量

IF 1.7 4区工程技术

Iet Electric Power Applications Pub Date : 2023-12-22 DOI: 10.1049/elp2.12408

Hossein Taghizade Ansari, Abolfazl Vahedi

{"title":"Assessing the moisture content of oil-impregnated paper bushings with a simple and fast method","authors":"Hossein Taghizade Ansari, Abolfazl Vahedi","doi":"10.1049/elp2.12408","DOIUrl":"10.1049/elp2.12408","url":null,"abstract":"Power outages can cause harm to both society and individual health. Among the crucial elements of power systems, power transformers play a vital role, and their failures can lead to incidents and disruptions. According to statistics, almost 50% of the explosions and fires in the power transformer are caused by oil-impregnated paper (OIP) bushing failures. Moreover, moisture is a crucial factor that affects the health of OIP bushings, and assessing the moisture level in OIP bushings is vital to guarantee the safety of power systems. While the frequency-domain dielectric spectroscopy (FDS) method has been widely used to assess the moisture content of OIP bushings on-site, it has the disadvantage of requiring a long measurement time. Therefore, a novel technique was proposed in this study that involves measuring the OIP bushing dissipation factor (tanδ) at 1 Hz to estimate the moisture content in a significantly shorter time. Five samples of OIP with various moisture levels have been selected, and an equation based on the OIPs' value of tanδ at 1 Hz was proposed to assess the moisture level of OIP bushings. Furthermore, the validity of the proposed method was successfully verified, proving its precision and time efficiency.","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"18 5","pages":"517-526"},"PeriodicalIF":1.7,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12408","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139164162","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 novel artificial neural network approach for residual life estimation of paper insulation in oil-immersed power transformers 估算油浸式电力变压器纸绝缘残余寿命的新型人工神经网络方法

IF 1.7 4区工程技术

Iet Electric Power Applications Pub Date : 2023-12-22 DOI: 10.1049/elp2.12407

Md. Manzar Nezami, Md. Danish Equbal, Md. Fahim Ansari, Majed A. Alotaibi, Hasmat Malik, Fausto Pedro García Márquez, Mohammad Asef Hossaini

{"title":"A novel artificial neural network approach for residual life estimation of paper insulation in oil-immersed power transformers","authors":"Md. Manzar Nezami, Md. Danish Equbal, Md. Fahim Ansari, Majed A. Alotaibi, Hasmat Malik, Fausto Pedro García Márquez, Mohammad Asef Hossaini","doi":"10.1049/elp2.12407","DOIUrl":"10.1049/elp2.12407","url":null,"abstract":"Avoiding financial losses requires preventing catastrophic oil-filled power transformer breakdowns. Continuous online transformer monitoring is needed. The authors use paper insulation to evaluate transformer health for continuous online transformer monitoring. The study suggests a new artificial intelligence method for estimating paper insulation residual life in oil-immersed power transformers. The four artificial intelligence models use backpropagation-based neural networks to predict paper insulation lifespan. Four primary transformer insulating paper failure indices—degree of polymerisation, 2-furfuraldehyde, carbon monoxide, and carbon dioxide—form the basis of these models. Each model, including the backpropagation-based neural networks, estimates paper insulation life using one failure index, along with moisture and temperature data. Optimisation techniques enhance hidden layer neurons and epoch count for improved performance. Results are validated against literature-based life models, establishing a precise input–output correlation. This method accurately predicts the remaining useable life of power transformer paper insulation, enabling utilities to take proactive measures for safe and efficient transformer operation.","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"18 4","pages":"477-488"},"PeriodicalIF":1.7,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12407","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138946090","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

Performance analysis and design optimization of asymmetric interior permanent magnet synchronous machine for electric vehicles applications 电动汽车用非对称内部永磁同步机的性能分析和优化设计

IF 1.7 4区工程技术

Iet Electric Power Applications Pub Date : 2023-12-15 DOI: 10.1049/elp2.12402

Niaz Muhammad, Faisal Khan, Basharat Ullah, Baheej Alghamdi

{"title":"Performance analysis and design optimization of asymmetric interior permanent magnet synchronous machine for electric vehicles applications","authors":"Niaz Muhammad, Faisal Khan, Basharat Ullah, Baheej Alghamdi","doi":"10.1049/elp2.12402","DOIUrl":"10.1049/elp2.12402","url":null,"abstract":"A novel asymmetric delta-type and Spoke-type interior permanent magnet synchronous machine (ASD-IPM) is proposed for electric vehicles (EVs) application that uses the magnetic field shifting technique to maximise the average torque and lessen torque ripples. The proposed ASD-IPM is deduced from the conventional asymmetric spoke and V-shape IPM by attaching additional asymmetric flux barriers (AFB) to the left side of the spoke-type PMs and to the other side of the delta-type PMs. This configuration helps in reducing the leakage flux and achieving good flux concentration. The proposed design is optimised through a Genetic Algorithm (GA) to investigate the electromagnetic performances at no-load and on-load conditions. Also, the efficiency maps of both the proposed design and conventional design are analysed and compared. The results show that the proposed ASD-AIPM has superior efficiency and a favorable torque profile, making it a suitable choice for electric vehicle applications. Furthermore, the proposed design is rescaled to the Toyota Prius 2010 design, with the only change in the slot/pole pair combination due to the presence of spoke-PMs in the proposed design. The proposed ASD-IPM achieves 7% higher torque than the existing Toyota Prius 2010 model. The efficiency maps of the rescaled design are also analysed and compared.","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"18 4","pages":"425-435"},"PeriodicalIF":1.7,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12402","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138996098","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

Modelling and suppression of bearing voltage of wind turbine permanent magnet synchronous generators 风力涡轮机永磁同步发电机轴承电压的建模与抑制

IF 1.7 4区工程技术

Iet Electric Power Applications Pub Date : 2023-12-15 DOI: 10.1049/elp2.12403

Lei Jia, Ruifang Liu, Zhihao Li, Shulin Li, Xin Huang

{"title":"Modelling and suppression of bearing voltage of wind turbine permanent magnet synchronous generators","authors":"Lei Jia, Ruifang Liu, Zhihao Li, Shulin Li, Xin Huang","doi":"10.1049/elp2.12403","DOIUrl":"10.1049/elp2.12403","url":null,"abstract":"The problem of bearing current is common in wind power generation system, which leads to the attenuation of generator life and great economic losses. Bearing voltage of a 5.5 MW wind-turbine permanent magnet synchronous generator is studied. The bearing voltage equivalent circuit is modelled by studying the internal system structure of the generator, and an extraction method of cable parameters, generator winding parameters and stray capacitance parameters based on experiments is proposed to simulate the system. A system test platform is built to test the common mode voltage, common mode current and bearing voltage, and the test results are compared with the simulation results in time domain and frequency domain. The result indicate that the common mode equivalent model can accurately simulate the actual bearing voltage. Finally, rotor flange insulation is adopted to suppress bearing voltage. The relationship between the design of rotor flange insulation with suppressing effect is discussed. Finally, an optimisation design method is presented for the proposed suppression scheme.","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"18 4","pages":"436-445"},"PeriodicalIF":1.7,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12403","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138996642","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