Pub Date : 2023-01-01DOI: 10.23919/CJEE.2023.000023
Siti Nor Azlina M. Ghazali;Muhamad Zahim Sujod;Mohd Shawal Jadin
{"title":"A Multi-Scale Smart Fault Diagnosis Model Based on Waveform Length and Autoregressive Analysis for PV System Maintenance Strategies","authors":"Siti Nor Azlina M. Ghazali;Muhamad Zahim Sujod;Mohd Shawal Jadin","doi":"10.23919/CJEE.2023.000023","DOIUrl":"https://doi.org/10.23919/CJEE.2023.000023","url":null,"abstract":"","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"9 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/10272329/10186256.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49939873","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}
Pub Date : 2023-01-01DOI: 10.23919/CJEE.2023.000013
Ping'an Tan;Bin Song;Xu Shangguan;Huadong Liu
{"title":"Optimal Design of Transmission Characteristics for Hexagonal Coil Wireless Power Transfer System Based on Genetic Algorithm","authors":"Ping'an Tan;Bin Song;Xu Shangguan;Huadong Liu","doi":"10.23919/CJEE.2023.000013","DOIUrl":"https://doi.org/10.23919/CJEE.2023.000013","url":null,"abstract":"","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"9 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/10173479/10103786.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49942140","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}
{"title":"Design to Improve Thrust Force Performance of Dual-side Primary Permanent-magnet Vernier Linear Motor","authors":"Jinghua Ji;Xuhui Zhu;Hongyu Tang;Liang Xu;Wenxiang Zhao","doi":"10.23919/CJEE.2023.000005","DOIUrl":"https://doi.org/10.23919/CJEE.2023.000005","url":null,"abstract":"","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"9 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/10173479/10103784.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49941473","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}
{"title":"Experimental Study on the Effect of State of Charge on Failure Propagation Characteristics within Battery Modules","authors":"Kuijie Li;Yalun Li;Xinyu Rui;Yuancheng Cao;Liyun Fan;Xuning Feng","doi":"10.23919/CJEE.2023.000007","DOIUrl":"https://doi.org/10.23919/CJEE.2023.000007","url":null,"abstract":"","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"9 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/10272329/10103808.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49939876","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}
Pub Date : 2022-12-01DOI: 10.23919/CJEE.2022.000035
Hong Li;Siyi Wang;Chongmo Zhang;Bo Zhang
With the increase in the switching frequency and power density, DC-DC converters encounter more severe electromagnetic interference (EMI) problems. To suppress the common-mode EMI generated by converters, as well as maintain the high-power-density of converters, the active EMI filter (AEF) has attracted increasing interest owing to its small volume. The EMI suppression effect of the common single-stage single-sense single-injection AEF is confined because of the limited insertion loss, and the volume of the multi-stage AEF will be bulky. To solve this problem, this paper proposes a compact dual-current-injection current-sense current-compensation (DCJ-CSCC) AEF to increase the insertion loss in the entire conducted EMI frequency band, as well as considering the volume of the AEF. The structure and operating principle of the proposed AEF are introduced. Finally, taking a boost converter as an example, the effectiveness and advantages of the proposed DCJ-CSCC AEF were verified through a simulation and experiment, the results show that the proposed AEF has a better EMI suppression effect on the entire conducted EMI frequency band with a similar volume compared with existing single-injection feedforward current-sense current-compensation (FF-CSCC) and feedback current-sense current-compensation (FB-CSCC) AEFs. This paper provides a new selection for EMI suppression in DC-DC converters.
{"title":"Dual-current-injection CSCC Active Common-mode EMI Filters with High Insertion Loss for DC-DC Converters","authors":"Hong Li;Siyi Wang;Chongmo Zhang;Bo Zhang","doi":"10.23919/CJEE.2022.000035","DOIUrl":"10.23919/CJEE.2022.000035","url":null,"abstract":"With the increase in the switching frequency and power density, DC-DC converters encounter more severe electromagnetic interference (EMI) problems. To suppress the common-mode EMI generated by converters, as well as maintain the high-power-density of converters, the active EMI filter (AEF) has attracted increasing interest owing to its small volume. The EMI suppression effect of the common single-stage single-sense single-injection AEF is confined because of the limited insertion loss, and the volume of the multi-stage AEF will be bulky. To solve this problem, this paper proposes a compact dual-current-injection current-sense current-compensation (DCJ-CSCC) AEF to increase the insertion loss in the entire conducted EMI frequency band, as well as considering the volume of the AEF. The structure and operating principle of the proposed AEF are introduced. Finally, taking a boost converter as an example, the effectiveness and advantages of the proposed DCJ-CSCC AEF were verified through a simulation and experiment, the results show that the proposed AEF has a better EMI suppression effect on the entire conducted EMI frequency band with a similar volume compared with existing single-injection feedforward current-sense current-compensation (FF-CSCC) and feedback current-sense current-compensation (FB-CSCC) AEFs. This paper provides a new selection for EMI suppression in DC-DC converters.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"8 4","pages":"19-29"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/10018147/10018151.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45700170","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}
Pub Date : 2022-12-01DOI: 10.23919/CJEE.2022.000037
Hui Liu;Jianan Chen;Dong Jiang;Hong Li;Xuejun Pei;Wei Sun
Modular multilevel converters (MMCs) have been widely used owing to their superior performance. However, the rapid switching of power electronics devices causes serious electromagnetic interference (EMI). There are a large number of obvious EMI peaks in the frequency spectrum of the carrier phase-shifted constant-switching-frequency pulse-width modulation (CSFPWM). Spreading the EMI across a wider frequency range can help to reduce the EMI peaks. In this study, we designed a uniform distribution (UD) spread-spectrum modulation technology using the principle of uniform switching frequency distribution and minimum switching loss for MMC. Its feasibility is verified by theoretical derivation and simulation. Then, the effectiveness of UDPWM in reducing the EMI is verified in experiments with a prototype MMC testbed in the lab. Compared with traditional CSFPWM, UDPWM can reduce conducted EMI by 10–20 dB. Also, compared with random PWM (RPWM), UDPWM can improve efficiency and reduce total harmonic distortion (THD) of output voltage and current in MMC.
{"title":"Uniform Distribution Spread-spectrum Modulation Strategy for MMC to Reduce Conducted EMI and Switching Loss","authors":"Hui Liu;Jianan Chen;Dong Jiang;Hong Li;Xuejun Pei;Wei Sun","doi":"10.23919/CJEE.2022.000037","DOIUrl":"10.23919/CJEE.2022.000037","url":null,"abstract":"Modular multilevel converters (MMCs) have been widely used owing to their superior performance. However, the rapid switching of power electronics devices causes serious electromagnetic interference (EMI). There are a large number of obvious EMI peaks in the frequency spectrum of the carrier phase-shifted constant-switching-frequency pulse-width modulation (CSFPWM). Spreading the EMI across a wider frequency range can help to reduce the EMI peaks. In this study, we designed a uniform distribution (UD) spread-spectrum modulation technology using the principle of uniform switching frequency distribution and minimum switching loss for MMC. Its feasibility is verified by theoretical derivation and simulation. Then, the effectiveness of UDPWM in reducing the EMI is verified in experiments with a prototype MMC testbed in the lab. Compared with traditional CSFPWM, UDPWM can reduce conducted EMI by 10–20 dB. Also, compared with random PWM (RPWM), UDPWM can improve efficiency and reduce total harmonic distortion (THD) of output voltage and current in MMC.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"8 4","pages":"39-51"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/10018147/10018156.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44630624","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}
Pub Date : 2022-12-01DOI: 10.23919/CJEE.2022.000033
Zhedong Ma;Shuo Wang
Recently, radiated electromagnetic interference (EMI) has become a research hotspot in power electronics systems, as the switching frequencies of power electronics systems have increased significantly with the adoption of wide-bandgap devices. In this article, a generalized radiated EMI model for power electronics converters with power cables is first reviewed. The radiated EMI model is then developed for a flyback power converter with critical ground impedance included. Based on the developed model, accurate high-frequency parameter extraction techniques and a radiated EMI prediction technique are developed and experimentally validated. Finally, essential measurement techniques are identified and developed to accurately extract parameters for accurate EMI prediction. The effects of the resolution bandwidth of the spectrum analyzer and critical PCB ground impedance on the radiated EMI are experimentally validated. PCB's impact on the common-mode (CM) choke's impedance and the radiated EMI is further validated. Techniques for minimizing the undesired near-field couplings in parameter extraction are discussed. The predicted EMI properly agreed with the measured EMI in the range of 30–230 MHz based on the EN55032 3 m class B standard.
{"title":"Prediction and Measurement Techniques for Radiated EMI of Power Converters with Cables","authors":"Zhedong Ma;Shuo Wang","doi":"10.23919/CJEE.2022.000033","DOIUrl":"10.23919/CJEE.2022.000033","url":null,"abstract":"Recently, radiated electromagnetic interference (EMI) has become a research hotspot in power electronics systems, as the switching frequencies of power electronics systems have increased significantly with the adoption of wide-bandgap devices. In this article, a generalized radiated EMI model for power electronics converters with power cables is first reviewed. The radiated EMI model is then developed for a flyback power converter with critical ground impedance included. Based on the developed model, accurate high-frequency parameter extraction techniques and a radiated EMI prediction technique are developed and experimentally validated. Finally, essential measurement techniques are identified and developed to accurately extract parameters for accurate EMI prediction. The effects of the resolution bandwidth of the spectrum analyzer and critical PCB ground impedance on the radiated EMI are experimentally validated. PCB's impact on the common-mode (CM) choke's impedance and the radiated EMI is further validated. Techniques for minimizing the undesired near-field couplings in parameter extraction are discussed. The predicted EMI properly agreed with the measured EMI in the range of 30–230 MHz based on the EN55032 3 m class B standard.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"8 4","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/10018147/10018155.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48675773","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}
Pub Date : 2022-12-01DOI: 10.23919/CJEE.2022.000043
Zhiyong Yuan;Xia Shen;Yingjie Tan;Zhenhua Tan;Jinyong Lei
A virtual synchronous generator (VSG) can provide inertial support through renewables and energy storage. It generally operates in parallel with a diesel generator (DSG) in an islanded microgrid. However, unforeseen interactive power oscillations occur in the paralleled system when loads fluctuate. These may also burn out the VSG owing to its low overcurrent capacity. The mechanism and suppression strategy of the power oscillation of a VSG-DSG paralleled system are investigated. It reveals that the interactive power oscillation is caused essentially by the physical difference and parameter mismatch between the VSG and DSG. Then, the elimination condition of oscillation generation is derived. Subsequently, a comprehensive suppression control strategy based on virtual inductance and dynamic mutual damping technology is proposed. Finally, the experimental results verify the effectiveness of the proposed method.
{"title":"Interactive Power Oscillation and Its Suppression Strategy for VSG-DSG Paralleled System in Islanded Microgrid","authors":"Zhiyong Yuan;Xia Shen;Yingjie Tan;Zhenhua Tan;Jinyong Lei","doi":"10.23919/CJEE.2022.000043","DOIUrl":"10.23919/CJEE.2022.000043","url":null,"abstract":"A virtual synchronous generator (VSG) can provide inertial support through renewables and energy storage. It generally operates in parallel with a diesel generator (DSG) in an islanded microgrid. However, unforeseen interactive power oscillations occur in the paralleled system when loads fluctuate. These may also burn out the VSG owing to its low overcurrent capacity. The mechanism and suppression strategy of the power oscillation of a VSG-DSG paralleled system are investigated. It reveals that the interactive power oscillation is caused essentially by the physical difference and parameter mismatch between the VSG and DSG. Then, the elimination condition of oscillation generation is derived. Subsequently, a comprehensive suppression control strategy based on virtual inductance and dynamic mutual damping technology is proposed. Finally, the experimental results verify the effectiveness of the proposed method.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"8 4","pages":"113-124"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/10018147/10018152.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43264005","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}
Pub Date : 2022-12-01DOI: 10.23919/CJEE.2022.000036
Zhenyu Zhao;Fei Fan;Quqin Sun;Huamin Jie;Zhou Shu;Wensong Wang;Kye Yak See
The high-frequency (HF) modeling of induction motors plays a key role in predicting the motor terminal overvoltage and conducted emissions in a motor drive system. In this study, a physics informed neural network-based HF modeling method, which has the merits of high accuracy, good versatility, and simple parameterization, is proposed. The proposed model of the induction motor consists of a three-phase equivalent circuit with eighteen circuit elements per phase to ensure model accuracy. The per phase circuit structure is symmetric concerning its phase-start and phase-end points. This symmetry enables the proposed model to be applicable for both star- and delta-connected induction motors without having to recalculate the circuit element values when changing the motor connection from star to delta and vice versa. Motor physics knowledge, namely per-phase impedances, are used in the artificial neural network to obtain the values of the circuit elements. The parameterization can be easily implemented within a few minutes using a common personal computer (PC). Case studies verify the effectiveness of the proposed HF modeling method.
{"title":"Physics Informed Neural Network-based High-frequency Modeling of Induction Motors","authors":"Zhenyu Zhao;Fei Fan;Quqin Sun;Huamin Jie;Zhou Shu;Wensong Wang;Kye Yak See","doi":"10.23919/CJEE.2022.000036","DOIUrl":"10.23919/CJEE.2022.000036","url":null,"abstract":"The high-frequency (HF) modeling of induction motors plays a key role in predicting the motor terminal overvoltage and conducted emissions in a motor drive system. In this study, a physics informed neural network-based HF modeling method, which has the merits of high accuracy, good versatility, and simple parameterization, is proposed. The proposed model of the induction motor consists of a three-phase equivalent circuit with eighteen circuit elements per phase to ensure model accuracy. The per phase circuit structure is symmetric concerning its phase-start and phase-end points. This symmetry enables the proposed model to be applicable for both star- and delta-connected induction motors without having to recalculate the circuit element values when changing the motor connection from star to delta and vice versa. Motor physics knowledge, namely per-phase impedances, are used in the artificial neural network to obtain the values of the circuit elements. The parameterization can be easily implemented within a few minutes using a common personal computer (PC). Case studies verify the effectiveness of the proposed HF modeling method.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"8 4","pages":"30-38"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/10018147/10018160.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42994783","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}
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