Chinese Journal of Electrical Engineering最新文献_第2页

Pole-Wrapped Negative Equivalent Magnetic Reluctance Structure-Based Transformer for Line-Frequency Isolation-Dependent Applications 用于线路频率隔离应用的极包负等效磁感结构变压器

Chinese Journal of Electrical Engineering Pub Date : 2024-06-13 DOI: 10.23919/CJEE.2024.000077

Yuanxi Chen;Weinong Fu;Shuangxia Niu;Hongjian Lin

{"title":"Pole-Wrapped Negative Equivalent Magnetic Reluctance Structure-Based Transformer for Line-Frequency Isolation-Dependent Applications","authors":"Yuanxi Chen;Weinong Fu;Shuangxia Niu;Hongjian Lin","doi":"10.23919/CJEE.2024.000077","DOIUrl":"https://doi.org/10.23919/CJEE.2024.000077","url":null,"abstract":"Isolation-dependent applications require a transformer with high efficiency, low magnetizing current, and anti-DC bias capability. The kilohertz planar negative magnetic reluctance structure is used to achieve this target with its magnetic-frequency variation property, which reduces the magnetic reluctance of the fundamental component. However, this design cannot be applied to low-frequency transformers owing to the high loss caused by its limited self-inductance and quality factor. To solve this problem, a pole-wrapped negative equivalent magnetic reluctance (PNEMR) structure is presented. The proposed design employed a copper-based PNEMR structure wrapped around the magnetic poles to enhance the fundamental flux and suppress the DC component of flux. Accordingly, the magnetizing current is reduced, and the isolation transformer is less susceptible to the DC bias. The proposed design can simultaneously improve the anti-DC magnetic bias capability, efficiency, and power factor of the transformers. To verify the effectiveness of the proposed design, a 10 kW C-core PNEMR structure-based transformer for isolation-dependent applications was constructed and compared to the generalized structures and transformers with planar negative magnetic reluctance structures. Results indicate that the PNEMR-based transformer can enhance the efficiency and power factor from 96.1% and 0.87 to 96.6% and 0.93, respectively, under full load conditions.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"10 3","pages":"12-24"},"PeriodicalIF":0.0,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10557491","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142397125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ice-Covered Environmental Adaptability Assessment for Overhead Contact System in High-Speed Railways 高速铁路架空接触网系统的覆冰环境适应性评估

Chinese Journal of Electrical Engineering Pub Date : 2024-06-01 DOI: 10.23919/CJEE.2024.000058

Huan Zhang;Wenfu Wei;Like Pan;Zefeng Yang;Guizao Huang;Yuxin Liu;Xing Chen;Ziqian Yang;Guangning Wu

{"title":"Ice-Covered Environmental Adaptability Assessment for Overhead Contact System in High-Speed Railways","authors":"Huan Zhang;Wenfu Wei;Like Pan;Zefeng Yang;Guizao Huang;Yuxin Liu;Xing Chen;Ziqian Yang;Guangning Wu","doi":"10.23919/CJEE.2024.000058","DOIUrl":"https://doi.org/10.23919/CJEE.2024.000058","url":null,"abstract":"High-speed trains rely on pantograph-catenary systems (PCSs) to collect electrical energy from power systems. However, the dynamic interaction between the pantograph and the catenary system may become mismatched once ice accumulates on the overhead conductors. More frequent arcing may occur within the PCS during train operation, posing an unpredictable threat to operational safety. Therefore, it is crucial to evaluate the ability of overhead contact system (OCS) to withstand ice-covered variability during line desgin. A new strategy is proposed to evaluate the adaptive performance of an OCS under various icing conditions. First, a dynamic model considering icing conditions is constructed to simulate the interaction within the PCS. Five different OCS structures with various icing thicknesses are studied. The parameters of the contact force within the PCS and proportion of high-possibility arcing moments are obtained. The dependence of the contact force on the icing thickness and pantograph displacement has been illustrated in the form of cloud maps. Finally, the OCS sensitivity coefficient is calculated, and ice-covered environmental adaptability assessments for the five different OCS oes structures are compared.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"10 2","pages":"70-79"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10586893","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141543838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Review of Inductance Identification Methods Considering Inverter Nonlinearity for PMSM 考虑 PMSM 逆变器非线性的电感识别方法综述

Chinese Journal of Electrical Engineering Pub Date : 2024-06-01 DOI: 10.23919/CJEE.2023.000046

Qiwei Wang;Jiqing Xue;Gaolin Wang;Yihua Hu;Dianguo Xu

引用次数: 0

Overview of Torque Ripple Minimization Methods for Permanent Magnet Synchronous Motors Based on Harmonic Injection 基于谐波注入的永磁同步电机转矩纹波最小化方法概述

Chinese Journal of Electrical Engineering Pub Date : 2024-06-01 DOI: 10.23919/CJEE.2023.000045

Peng Yi;Wenzhi Zheng;Xianglin Li

引用次数: 0

A Simple Primary Key Algorithm Based Shade Dispersion Method for Maximizing PV Power Generation Under Partial Shading Conditions 一种基于主键算法的简单遮阳分散方法，用于在部分遮阳条件下实现光伏发电量最大化

Chinese Journal of Electrical Engineering Pub Date : 2024-06-01 DOI: 10.23919/CJEE.2024.000067

Prabhakaran Koothu Kesavan;A. Karthikeyan;Manoj Kumar;Sushant Mandal

{"title":"A Simple Primary Key Algorithm Based Shade Dispersion Method for Maximizing PV Power Generation Under Partial Shading Conditions","authors":"Prabhakaran Koothu Kesavan;A. Karthikeyan;Manoj Kumar;Sushant Mandal","doi":"10.23919/CJEE.2024.000067","DOIUrl":"https://doi.org/10.23919/CJEE.2024.000067","url":null,"abstract":"The output power generation of a photovoltaic (PV) array reduces under partial shading, resulting in multiple local maxima in the PV characteristics and inaccurate tracking of the global maximum power point (GMPP). Various interconnection schemes are available to reduce power losses under partial shading. In this study, a primary key algorithm is proposed for distributing shading across an array. This method is suitable for any \u0000<tex>$ntimes n$</tex>\u0000 PV array configuration and involves fewer calculations and variables, leading to reduced computational complexity. The power generations of a \u0000<tex>$9times 9$</tex>\u0000 PV array under four different shading conditions were compared with the configurations of: total cross-tied (TCT) and Su Du Ku, physical relocation and fixed column position of modules with fixed electrical connection (PRFCPM-FEC), and magic square (MS) and improved-odd-even-prime (IOEP). The advantage of the proposed method is that once the primary key elements are obtained, the remaining array elements are numbered in a simpler manner. The results obtained using the proposed arrangement show that the power is enhanced with reference to the TCT and is comparable to the Su Do Ku, PRFCPM-FEC, MS, and IOEP reconfigurations.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"10 2","pages":"93-102"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10586857","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141543848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Wavelet Synchro-Squeezing Transform and Dynamic Threshold Supported Symmetrical Power Swing Technique for Modern Transmission Network 用于现代传输网络的小波同步挤占变换和动态阈值支持对称功率摆动技术

Chinese Journal of Electrical Engineering Pub Date : 2024-06-01 DOI: 10.23919/CJEE.2024.000064

Monalisa Biswal;Kumar Raja Andanapalli;Papia Ray

{"title":"Wavelet Synchro-Squeezing Transform and Dynamic Threshold Supported Symmetrical Power Swing Technique for Modern Transmission Network","authors":"Monalisa Biswal;Kumar Raja Andanapalli;Papia Ray","doi":"10.23919/CJEE.2024.000064","DOIUrl":"https://doi.org/10.23919/CJEE.2024.000064","url":null,"abstract":"Distance relays are prone to symmetrical power swing phenomenon. To mitigate this issue, a dynamic threshold-supported algorithm is proposed. A single logic is not supposed to be secure for all cases. Thus, a supervisory algorithm, as proposed in this study, can aid in the improvement of the immunity of the relay during swing cases and be sensitive to symmetrical faults. In the developed stages, a three-phase power signal was used and processed in two different steps: (i) extraction of the effective intrinsic mode function (IMF) selected from the Kurtosis analysis using the wavelet synchro-squeezing transform, and (ii) estimation of the average Euclidean distance index using the absolute values of the decomposed IMF's. The adaptive threshold facilitated resistance to swing situations. At the onset of a symmetrical fault, the proposed algorithm efficiently discriminated among events using a dynamic threshold. The IEEE 39-bus test system and Indian Eastern Power Grid networks were modelled using PSCAD software, and cases were generated to test the efficacy of the method. The impact of the proposed method on a large-scale wind farm was also evaluated. A comparative analysis with other existing methods revealed the security and dependability of the proposed method.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"10 2","pages":"30-43"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10586885","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141543322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of Eccentric PM on High-Frequency Vibration in FSCW PM Machine Considering Force Modulation Effect 考虑力调制效应的偏心永磁对 FSCW 永磁机械高频振动的影响研究

Chinese Journal of Electrical Engineering Pub Date : 2024-06-01 DOI: 10.23919/CJEE.2024.000063

Jinghua Ji;Weizhi Jiang;Wenxiang Zhao;Tong Liu

引用次数: 0

Design and Manufacture of Dual-Gate DDSCR with High Failure Current and Holding Voltage 设计和制造具有高失效电流和保持电压的双栅 DDSCR

Chinese Journal of Electrical Engineering Pub Date : 2024-06-01 DOI: 10.23919/CJEE.2024.000061

Xingtao Bao;Yang Wang;Yujie Liu;Xiangliang Jin

{"title":"Design and Manufacture of Dual-Gate DDSCR with High Failure Current and Holding Voltage","authors":"Xingtao Bao;Yang Wang;Yujie Liu;Xiangliang Jin","doi":"10.23919/CJEE.2024.000061","DOIUrl":"https://doi.org/10.23919/CJEE.2024.000061","url":null,"abstract":"High-voltage controller area network (CAN) buses have a harsh working environment and require a robust electrostatic discharge (ESD) design window. Thus, ordinary silicon-controlled rectifier (SCR) devices do not satisfy these design requirements. To streamline the design and manufacturing of SCRs, this study proposes a novel dual-gate dual-direction SCR (DG-DDSCR) with a high failure current and holding voltage. First, four polysilicon gates, Gate\u0000<inf>A1</inf>\u0000, Gate\u0000<inf>A2</inf>\u0000, Gate\u0000<inf>C1</inf>\u0000, and Gate\u0000<inf>C2</inf>\u0000, were introduced to the N+ and P+ middle regions of the anode and cathode. When the voltage acts on the anode, the electric field generated by the polysilicon gate strengthens the SCR current path while promoting the release of ESD current in the substrate path. Specifically, the holding voltage of the DG-DDSCR and failure current derived from the test results of a transmission line pulse (TLP) are 29.4 V and 16.7 A, respectively. When the clamping voltage was 40 V, the transient current release of the structure can reach 11.61 A, which met the specifications of the CAN bus ESD window and was suitable for the ESD protection of the target application.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"10 2","pages":"116-125"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10586888","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141544080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 Solution of a Fractional-Slot Double-Layer-Winding Open-Slot Vernier Permanent Magnet Machine with Tooth Tips 带齿尖的分数槽双层绕组开槽游标永磁机的解析解

Chinese Journal of Electrical Engineering Pub Date : 2024-06-01 DOI: 10.23919/CJEE.2024.000057

Weibing Wang;Ming Cheng

{"title":"Analytical Solution of a Fractional-Slot Double-Layer-Winding Open-Slot Vernier Permanent Magnet Machine with Tooth Tips","authors":"Weibing Wang;Ming Cheng","doi":"10.23919/CJEE.2024.000057","DOIUrl":"https://doi.org/10.23919/CJEE.2024.000057","url":null,"abstract":"An analytical solution (ANA) for a fractional-slot double-layer-winding open-slot vernier permanent magnet (VPM) machine with tooth tips is presented. Magnetic vector potential equations are analytically solved using the technique of variable separation in four subdomains in a two-dimensional polar coordinate system. Based on the solved magnetic vector potential, the flux density distribution, torque, flux linkage, inductance, electromotive force (EMF) and power factor are analytically developed. An 18-slot/32-rotor-pole prototype is analyzed, and the results match well with the finite element analysis (FEA), which validates that the ANA consumes less time than FEA. Therefore, the tooth tips are optimized using the ANA to improve the average torque. Moreover, the ANA can be used to evaluate the demagnetization withstand capabilities of permanent magnets. The material utilization, slot-filling factor, EMF, and torque are compared between the models with three and four subdomains. Finally, an experimental prototype is constructed and tested, and the results validate the ANA.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"10 2","pages":"44-58"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10586886","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141543839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 Distributed Coordination Control Method for Microgrid System Based on Finite-Time Event-Triggered Consensus Algorithm 基于有限时间事件触发共识算法的微电网系统分布式协调控制方法研究

Chinese Journal of Electrical Engineering Pub Date : 2024-06-01 DOI: 10.23919/CJEE.2024.000053

Lizhen Wu;Heng Yang;Jianping Wei;Wendong Jiang

{"title":"Research on Distributed Coordination Control Method for Microgrid System Based on Finite-Time Event-Triggered Consensus Algorithm","authors":"Lizhen Wu;Heng Yang;Jianping Wei;Wendong Jiang","doi":"10.23919/CJEE.2024.000053","DOIUrl":"https://doi.org/10.23919/CJEE.2024.000053","url":null,"abstract":"Microgrids are networked control systems with multiple distributed generators (DGs). Microgrids are associated with many problems, such as communication delays, high sampling rates, and frequent controller updates, which make it challenging to realize coordination control among the DGs. Therefore, finite-time consensus algorithms and event-triggered control methods are combined to propose a distributed coordination control method for microgrid systems. The DG in the microgrid system serves as an agent node in the control network, and a distributed secondary controller is designed using finite-time consensus algorithm, such that the frequency and voltage restoration control has a faster convergence time and better anti-interference performance. The event-triggered function was designed based on the state information of the agents. The controller exchanges the state information at the trigger instants. System stability is analyzed using the Lyapunov stability theory, and it is verified that the controller cannot exhibit the Zeno phenomenon in the event-triggered process. A simulation platform was developed in Matlab/Simulink to verify that the proposed control method can effectively reduce the frequency of controller updates during communication delays and the burden on the communication network.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"10 2","pages":"103-115"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10586887","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141543849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0