Iet Electric Power Applications最新文献_第2页

A recurrent neural network-based rotor displacement estimation method for eight-pole active magnetic bearing 基于递归神经网络的八极主动磁轴承转子位移估计方法

IF 1.5 4区工程技术

Iet Electric Power Applications Pub Date : 2024-09-25 DOI: 10.1049/elp2.12499

Longyuan Fan, Zicheng Liu, Haijiao Wang, Dong Jiang, Yu Chen

{"title":"A recurrent neural network-based rotor displacement estimation method for eight-pole active magnetic bearing","authors":"Longyuan Fan, Zicheng Liu, Haijiao Wang, Dong Jiang, Yu Chen","doi":"10.1049/elp2.12499","DOIUrl":"https://doi.org/10.1049/elp2.12499","url":null,"abstract":"Active magnetic bearing (AMB) is a key technology in high-speed rotating machines for rotor suspension, where the displacement sensors play a crucial role in detecting and controlling the rotor position. However, the traditional displacement sensors have the problems of high cost, large volume and poor reliability. To solve these problems, this paper proposes an innovative solution that utilises a recurrent neural network (RNN) to estimate the rotor displacement from the current in the AMB controller. The proposed method offers high-quality prediction performance for the rotor displacement which is close to the high precision eddy current displacement sensors. The mathematical model of AMB is analysed to provide guidance in historical current data acquisition and design of RNN. The input dimensions and the architecture of the neural network are optimised to improve both prediction accuracy and computational complexity. Experimental results validate the effectiveness of the algorithm and demonstrate that the proposed method has high accuracy, robustness and generalisation ability.","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"18 11","pages":"1480-1490"},"PeriodicalIF":1.5,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12499","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142749007","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

Design and analysis of a new feature optimisation method for circuit breakers defect identification 一种新的断路器缺陷识别特征优化方法的设计与分析

IF 1.5 4区工程技术

Iet Electric Power Applications Pub Date : 2024-09-25 DOI: 10.1049/elp2.12498

Huilan Liu, Xiang Li, Shutao Zhao, Shi Qiu, Jiaomin Liu, Chen Wang

{"title":"Design and analysis of a new feature optimisation method for circuit breakers defect identification","authors":"Huilan Liu, Xiang Li, Shutao Zhao, Shi Qiu, Jiaomin Liu, Chen Wang","doi":"10.1049/elp2.12498","DOIUrl":"https://doi.org/10.1049/elp2.12498","url":null,"abstract":"The vibration signals of a circuit breaker (CB) contain important action timing information. The optimisation of features extraction for vibration signals generated during the operation process of CBs is crucial for rapid defect location and identification for CB. The authors propose a new feature optimisation method, defined as energy trajectory entropy of vibration signals via tracing the action characteristics of the main shaft of CBs. Firstly, an image tracking algorithm is employed to dynamically capture the key frames of the high-speed image sequence of the main shaft and accurately divide the action sequence. The “cluster” instantaneous energy waveforms of the vibration signal, divided by zones, are then diffused by the twiddle factor in the polar coordinate sub grid area, while the energy trajectory entropy algorithm (ETE) is utilised to investigate the subtle changes in the energy release process. The ETE scale parameters are optimised using a support vector machine identification model. This enables rapid location of defective components in CBs, resulting in a significant reduction in time cost. The experiment has confirmed the strong feature correlation between CBs action and vibration signals, offering new ideas for achieving non-invasive defect identification of CBs.","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"18 11","pages":"1469-1479"},"PeriodicalIF":1.5,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12498","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142749135","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

Impact of close proximity pulse width modulation switching events on electric machine terminal voltages 近距离脉宽调制开关事件对电机端子电压的影响

IF 1.5 4区工程技术

Iet Electric Power Applications Pub Date : 2024-09-18 DOI: 10.1049/elp2.12495

David A. Hewitt, Shubham Sundeep, Antonio Griffo, Jiabin Wang

{"title":"Impact of close proximity pulse width modulation switching events on electric machine terminal voltages","authors":"David A. Hewitt, Shubham Sundeep, Antonio Griffo, Jiabin Wang","doi":"10.1049/elp2.12495","DOIUrl":"https://doi.org/10.1049/elp2.12495","url":null,"abstract":"Electric machines form an essential part of a wide range of modern systems. When speed control is required, the use of pulse width modulation-based inverters is generally the solution of choice. It is also usual to connect the machine to the inverter using a cable. The combination of these three elements produces the potential for voltages which exceed the dc link voltage to occur at the machine terminals. Methods for predicting the terminal voltage exist; however, these methods assume that the pulses applied to the system can be considered as isolated, discrete events. The authors highlight an issue with this assumption. When a switching event occurs, it will cause a voltage disturbance in the unswitched phases of the system due to the mutual coupling between the phases. If a second switching event occurs within a short time of this event the resultant voltage will interact with the previous switching event resulting in a higher terminal voltage than would be the case for an isolated event. This effect can be problematic for insulation design if it is not considered. This issue is demonstrated, with the worst-case scenarios identified and potential methods of reducing terminal voltage being proposed.","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"18 11","pages":"1458-1468"},"PeriodicalIF":1.5,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12495","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142748834","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

Research on current sharing control of parallel inverters used on electric motor emulator 电机仿真器并联逆变器电流共享控制研究

IF 1.5 4区工程技术

Iet Electric Power Applications Pub Date : 2024-09-13 DOI: 10.1049/elp2.12494

Mingyu Wang, Beining Yang, Yaru Qin, Yonglun Jiang

{"title":"Research on current sharing control of parallel inverters used on electric motor emulator","authors":"Mingyu Wang, Beining Yang, Yaru Qin, Yonglun Jiang","doi":"10.1049/elp2.12494","DOIUrl":"https://doi.org/10.1049/elp2.12494","url":null,"abstract":"Parallel inverters have the advantages of low-output harmonics and high-parallel power, making them very suitable as the topology structure for an electric motor emulator. However, parallel inverters can also bring about circulating current issues, especially when using carrier phase shifted sinusoidal PWM (CPS-SPWM) control mode, which significantly increases circulating current, leading to increased output harmonics and losses in the system. In order to suppress circulating currents, this paper provides a detailed analysis from both high-frequency and low-frequency perspectives in CPS-SPWM control mode. A circulating current suppression method that combines hardware and software systems, adopting a cascaded coupled output network structure along with a corresponding error voltage space vector control method to achieve circulating current suppression, is proposed. By constructing a 6-branch parallel output experimental platform, the feasibility and effectiveness of the proposed method have been verified, suppressing current circulating currents and improving current quality.","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"18 11","pages":"1448-1457"},"PeriodicalIF":1.5,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12494","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142748893","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

Harmonic voltage phasor reconstruction and harmonic state estimation based on the measurement data of a capacitive voltage transformer 基于电容式电压互感器测量数据的谐波电压相位重构和谐波状态估计

IF 1.5 4区工程技术

Iet Electric Power Applications Pub Date : 2024-09-09 DOI: 10.1049/elp2.12481

Xiaoxian Zhu, Qingjun Peng, Dexu Zou, Shan Wang, Haozhou Wang, Fangrong Zhou, Desheng Chu

{"title":"Harmonic voltage phasor reconstruction and harmonic state estimation based on the measurement data of a capacitive voltage transformer","authors":"Xiaoxian Zhu, Qingjun Peng, Dexu Zou, Shan Wang, Haozhou Wang, Fangrong Zhou, Desheng Chu","doi":"10.1049/elp2.12481","DOIUrl":"https://doi.org/10.1049/elp2.12481","url":null,"abstract":"Harmonic state estimation, which highly depends on accurate synchronised phasors, is a crucial basis for the location, traceability, and governance of harmonics in power systems. However, most existing synchronous phasor measurement units (PMUs) provide power frequency phasors rather than harmonic phasors. In addition, as the dominant voltage signal provider for PMUs in power systems, capacitive voltage transformers (CVTs) have complex frequency responses and cannot be directly used for harmonic measurement. Therefore, accurate harmonic state estimation is difficult to achieve in applications. A method for harmonic voltage phasor reconstruction and harmonic state estimation based on the measurement data of a CVT is proposed. First, the reasons for harmonic voltage measurement errors were analysed. Second, the scattering parameter method was used to measure the wideband voltage transfer characteristics of CVT. Third, a voltage reconstruction method was proposed to improve the measurement accuracy and expand the frequency range of synchronous phasor measurement. Fourth, this method was applied to harmonic state estimation, and the performance of harmonic state estimation before and after voltage reconstruction was quantitatively compared. Results showed that the proposed method can remarkably improve the accuracy of harmonic state estimation. Finally, some factors, such as state observability, complex error disturbances, CVT structure, and harmonic order, influencing the performance of the proposed method were investigated. Results further demonstrated that the method has high accuracy, strong anti-interference, and adaptability, and can provide basic information for harmonic localisation and traceability.","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"18 10","pages":"1332-1346"},"PeriodicalIF":1.5,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12481","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707632","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

Research on loss differences and thermal optimisation of submerged cryogenic high-speed permanent magnet motors 水下低温高速永磁电机损耗差异及热优化研究

IF 1.5 4区工程技术

Iet Electric Power Applications Pub Date : 2024-09-06 DOI: 10.1049/elp2.12492

Baojun Ge, Yue Wang, Xiao Xu, Likun Wang, Shuo Huang, Zhifei Yang

{"title":"Research on loss differences and thermal optimisation of submerged cryogenic high-speed permanent magnet motors","authors":"Baojun Ge, Yue Wang, Xiao Xu, Likun Wang, Shuo Huang, Zhifei Yang","doi":"10.1049/elp2.12492","DOIUrl":"https://doi.org/10.1049/elp2.12492","url":null,"abstract":"The utilisation of high-speed motors in cryogenic motors achieves high efficiency and rapid transmission of cryogenic media, and at the same time, the high loss characteristic of high-speed motors enhances the vaporisation rate of cryogenic media and reduces the transmission quality of the media. Comprehensive numerical results on power loss and thermal characteristics of a submersible cryogenic high-speed permanent magnet motor are presented. The electromagnetic and frictional losses are calculated using precise numerical analysis, and these values are then incorporated into the fluid-thermal coupling solution model to obtain the temperature distribution results. In order to mitigate the impact of submerged cryogenic motor temperature on low-temperature medium vapourisation, the response surface optimisation method is employed for designing the rotor cooling diversion orifice, and determining the optimal dimensions, structure, and input conditions for flow velocity. The analysis results indicate that under low-temperature impact, the no-load back electromotive force increased by 9.3 V; the iron loss is increased by 22 W at rated speed and the optimised temperature is reduced by 4.3°C. A 30 kW, 12,000 rpm high-speed permanent magnet motor is utilised for validating the numerical model and the calculated results.","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"18 11","pages":"1554-1566"},"PeriodicalIF":1.5,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12492","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142748871","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

Predictive control method with conduction mode detection to suppress input current distortion of three-level power factor correction 采用导通模式检测的预测控制方法抑制三电平功率因数校正的输入电流畸变

IF 1.5 4区工程技术

Iet Electric Power Applications Pub Date : 2024-09-06 DOI: 10.1049/elp2.12491

Xifeng Xie, Zeliang Shu, Rongxin Chen, Jianghong Yin, Chunxiang Ling

{"title":"Predictive control method with conduction mode detection to suppress input current distortion of three-level power factor correction","authors":"Xifeng Xie, Zeliang Shu, Rongxin Chen, Jianghong Yin, Chunxiang Ling","doi":"10.1049/elp2.12491","DOIUrl":"https://doi.org/10.1049/elp2.12491","url":null,"abstract":"A novel predictive control method with conduction mode detection is proposed to suppress input current distortion of three-level power factor correction (PFC) converters. In PFC converter, the input current is mostly distorted in continuous conduction mode (CCM) with conventional control methods. The proposed predictive control method comprises of a predictive CCM algorithm, a predictive discontinuous conduction mode (DCM) algorithm, and a conduction mode detection technique. By analysing four switching states of PFC converter and based on the inductor current ripple, predictive control duty cycles in CCM and DCM are derived, and the optimal duty cycle is determined by forecasting the next cycle current. According to the duty cycle characteristics, the conduction mode is detected without additional detection algorithms and circuits, achieving the input current tracking the input voltage. Finally, the effectiveness and correctness of the proposed predictive control method are validated through simulation and experiment.","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"18 11","pages":"1651-1664"},"PeriodicalIF":1.5,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12491","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142748870","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

Analytical prediction of the open-circuit magnetic field for the V-shaped interior PM machine by the improved subdomain method 用改进的子域法分析预测 V 型室内永磁机械的开路磁场

IF 1.5 4区工程技术

Iet Electric Power Applications Pub Date : 2024-09-05 DOI: 10.1049/elp2.12484

Jie Ren, Fuchun Sun, Andong Wang, Ming Li, Jinyang Xu

{"title":"Analytical prediction of the open-circuit magnetic field for the V-shaped interior PM machine by the improved subdomain method","authors":"Jie Ren, Fuchun Sun, Andong Wang, Ming Li, Jinyang Xu","doi":"10.1049/elp2.12484","DOIUrl":"https://doi.org/10.1049/elp2.12484","url":null,"abstract":"The open-circuit magnetic field of the V-shaped interior PM (IPM) machine is predicted by the analytical method. The method is implemented following the basic principle of the subdomain method. The machine model is divided into five different regions, including rotor slot, magnetic barrier, air gap, stator slot, and stator slot opening. To perform the analytical prediction process in the polar coordinate system, these regions should be transformed into the appropriate subdomains. The last four regions can be transformed into the subdomains with the required shape based on the existing method. The rotor slot cannot be treated as a single subdomain, for the shape of which is irregular. Herein, the PM and vacuum region in the rotor slot is divided into several fan-shaped subdomains. The division method is described clearly. Then, the boundary conditions alongside the interface between adjacent subdomains are derived based on function transformation. On this basis, the open-circuit magnetic field of the IPM machine can be predicted. The magnetic field of the 6p/36 s V-shaped IPM machine is obtained by the proposed method, finite element method simulation, and experiment, respectively. Additionally, the comparison results verify the accuracy and efficiency of the proposed method.","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"18 10","pages":"1359-1369"},"PeriodicalIF":1.5,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12484","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707449","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

The fourth order flux observer with in-loop filter for permanent magnet synchronous motor sensorless control 永磁同步电机无传感器控制的四阶磁链环内滤波器观测器

IF 1.5 4区工程技术

Iet Electric Power Applications Pub Date : 2024-09-04 DOI: 10.1049/elp2.12489

Ziwen Wang, Ciyong Luo, Xiaoshu Jia, Zihao Xing

引用次数: 0

Effect of end leakage inductance on the performance of toroidal winding double-sided linear induction motors 端部漏感对环形绕组双面直线感应电机性能的影响

IF 1.5 4区工程技术

Iet Electric Power Applications Pub Date : 2024-09-03 DOI: 10.1049/elp2.12486

Huixian Zhang, Kunlun Zhang, Cheng Luo

引用次数: 0