Pub Date : 2023-06-28DOI: 10.1109/LEMCPA.2023.3290384
Yu-Ying Wu;Yan-Zhao Xie;Han Cao;Ning Dong;Yan-Peng Ge
This letter summarizes the existing test methods for protective devices and the waveforms of conducted transient electromagnetic disturbance in different standards. However, they mainly focus on the testing methods for the residual current of the protective devices or the response behaviors of the coaxial protector. To quantify the response performance of protection devices used in the power distribution system excited by electromagnetic transients, an optimal test method is then proposed. The test setup consists of a pulse generator, an absorption resistor, transmission lines, and the measurement system. The test results and simulation results of the 10-kV nongapped metal–oxide arrester verify the validation of the proposed method. By using the proposed method, the applied current and the current flowing through protective devices can be calculated so that the response time can be evaluated. Besides, this method can also be used to study the response of protective devices under other different disturbances.
{"title":"Test Methods for Performance of Protective Devices Excited by Conducted Transient Electromagnetic Disturbance","authors":"Yu-Ying Wu;Yan-Zhao Xie;Han Cao;Ning Dong;Yan-Peng Ge","doi":"10.1109/LEMCPA.2023.3290384","DOIUrl":"https://doi.org/10.1109/LEMCPA.2023.3290384","url":null,"abstract":"This letter summarizes the existing test methods for protective devices and the waveforms of conducted transient electromagnetic disturbance in different standards. However, they mainly focus on the testing methods for the residual current of the protective devices or the response behaviors of the coaxial protector. To quantify the response performance of protection devices used in the power distribution system excited by electromagnetic transients, an optimal test method is then proposed. The test setup consists of a pulse generator, an absorption resistor, transmission lines, and the measurement system. The test results and simulation results of the 10-kV nongapped metal–oxide arrester verify the validation of the proposed method. By using the proposed method, the applied current and the current flowing through protective devices can be calculated so that the response time can be evaluated. Besides, this method can also be used to study the response of protective devices under other different disturbances.","PeriodicalId":100625,"journal":{"name":"IEEE Letters on Electromagnetic Compatibility Practice and Applications","volume":"5 3","pages":"72-76"},"PeriodicalIF":0.0,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67868212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-23DOI: 10.1109/LEMCPA.2023.3288974
Jinjun Bai;Xiaolong Li;Xiaobing Niu
The uncertainty analysis method has been a research hotspot in the electromagnetic compatibility (EMC) field in recent years, and its results are presented in the form of a probability density curve. Currently, there is no reasonable method to evaluate the validity of uncertain results. It is not conducive to the improvement and popularization of new uncertainty analysis methods or models. The feature selective validation method is a mature validity evaluation method for deterministic electromagnetic simulation results, and this letter extends it to EMC uncertainty simulation results. On this basis, the convergence determination of the partial uncertainty analysis method is realized. The purpose is to further promote the application of the uncertainty analysis method in the EMC field.
{"title":"Application of the FSV Method in EMC Uncertainty Simulation Results","authors":"Jinjun Bai;Xiaolong Li;Xiaobing Niu","doi":"10.1109/LEMCPA.2023.3288974","DOIUrl":"10.1109/LEMCPA.2023.3288974","url":null,"abstract":"The uncertainty analysis method has been a research hotspot in the electromagnetic compatibility (EMC) field in recent years, and its results are presented in the form of a probability density curve. Currently, there is no reasonable method to evaluate the validity of uncertain results. It is not conducive to the improvement and popularization of new uncertainty analysis methods or models. The feature selective validation method is a mature validity evaluation method for deterministic electromagnetic simulation results, and this letter extends it to EMC uncertainty simulation results. On this basis, the convergence determination of the partial uncertainty analysis method is realized. The purpose is to further promote the application of the uncertainty analysis method in the EMC field.","PeriodicalId":100625,"journal":{"name":"IEEE Letters on Electromagnetic Compatibility Practice and Applications","volume":"5 4","pages":"122-126"},"PeriodicalIF":0.0,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73488525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-21DOI: 10.1109/LEMCPA.2023.3288421
Jinho Kim;Sungwook Moon;Jihyun Lee;Seonha Lee
In this letter, we propose flexible printed circuit (FPC) design guidelines for high-speed signal implementation in large-size and high-resolution liquid crystal display (LCD) TV modules by analyzing signal integrity (SI) characteristics through simulation and measurement. We observed that designing an FPC for LCD TV modules that can minimize insertion loss (IL) and crosstalk in the channel is critical to successfully implementing multi-Gb/s signal characteristics in large-size and high-resolution LCD TV modules. To prove this experimentally, we investigated the trends of IL, impedance, and crosstalk, which are design parameters of simulation-based FPCs, and designed four FPC samples assuming their application to the intrapanel interface module of a real 75-in LCD TV. Then, based on the measured S-parameter model, the SI performance was verified and compared by measurement and simulation to demonstrate the validity of the proposed design guidelines. In conclusion, to achieve the SI characteristics of FPCs in LCD TV modules, it is necessary to consider minimizing IL and mitigating crosstalk more than any other electrical performance by enabling the differential P/N pairs to have a strong coupling relationship.
{"title":"FPC Design Guidelines for Enabling High-Speed Intrapanel Interface in Large-Size LCD TVs","authors":"Jinho Kim;Sungwook Moon;Jihyun Lee;Seonha Lee","doi":"10.1109/LEMCPA.2023.3288421","DOIUrl":"https://doi.org/10.1109/LEMCPA.2023.3288421","url":null,"abstract":"In this letter, we propose flexible printed circuit (FPC) design guidelines for high-speed signal implementation in large-size and high-resolution liquid crystal display (LCD) TV modules by analyzing signal integrity (SI) characteristics through simulation and measurement. We observed that designing an FPC for LCD TV modules that can minimize insertion loss (IL) and crosstalk in the channel is critical to successfully implementing multi-Gb/s signal characteristics in large-size and high-resolution LCD TV modules. To prove this experimentally, we investigated the trends of IL, impedance, and crosstalk, which are design parameters of simulation-based FPCs, and designed four FPC samples assuming their application to the intrapanel interface module of a real 75-in LCD TV. Then, based on the measured S-parameter model, the SI performance was verified and compared by measurement and simulation to demonstrate the validity of the proposed design guidelines. In conclusion, to achieve the SI characteristics of FPCs in LCD TV modules, it is necessary to consider minimizing IL and mitigating crosstalk more than any other electrical performance by enabling the differential P/N pairs to have a strong coupling relationship.","PeriodicalId":100625,"journal":{"name":"IEEE Letters on Electromagnetic Compatibility Practice and Applications","volume":"5 3","pages":"97-101"},"PeriodicalIF":0.0,"publicationDate":"2023-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67868216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this letter, electromagnetic interference (EMI) in medical electronic systems related to the use of ready-made connecting devices is investigated. It has been observed that under some conditions, an inadequate number of shielding pins and their distribution in connectors and plugs may cause unacceptable EMI, especially when it occurs in, e.g., a surgery room. In real-life situations, installers are often deciding on how to arrange the shielding connections, while not being trained in electromagnetic compatibility-aware design. To get more insight and reveal the influence of some parameters of the shielding wiring, a lab measurement setup has been derived from a real environment, showing the impact of using imperfectly shielded connectors with different number and distributions of shielding wires. Suggestions for reducing the EMI of systems are proposed and can be applied to support installation practices and/or debugging in practical situations and various user environments.
{"title":"Influences of Wiring Inside Ready-Made Connecting Devices on EMI in Medical Electronic Systems","authors":"Zhao Chen;Tim Claeys;Ronny Deseine;Johan Catrysse;Davy Pissoort","doi":"10.1109/LEMCPA.2023.3286727","DOIUrl":"10.1109/LEMCPA.2023.3286727","url":null,"abstract":"In this letter, electromagnetic interference (EMI) in medical electronic systems related to the use of ready-made connecting devices is investigated. It has been observed that under some conditions, an inadequate number of shielding pins and their distribution in connectors and plugs may cause unacceptable EMI, especially when it occurs in, e.g., a surgery room. In real-life situations, installers are often deciding on how to arrange the shielding connections, while not being trained in electromagnetic compatibility-aware design. To get more insight and reveal the influence of some parameters of the shielding wiring, a lab measurement setup has been derived from a real environment, showing the impact of using imperfectly shielded connectors with different number and distributions of shielding wires. Suggestions for reducing the EMI of systems are proposed and can be applied to support installation practices and/or debugging in practical situations and various user environments.","PeriodicalId":100625,"journal":{"name":"IEEE Letters on Electromagnetic Compatibility Practice and Applications","volume":"5 4","pages":"142-148"},"PeriodicalIF":0.0,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79934996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This letter illustrates the use of a graphical argumentation notation, more specifically, the goal structuring notation, to document and represent the different elements in the overall argumentation of why a piece of equipment is deemed to comply with the essential requirements of the EMC directive (EMCD). Such a graphical argumentation notation helps to overcome the significant bottlenecks of a pure-text-based approach by presenting the different elements of the argumentation in a clear and easy-to-understand visual format. This letter proposes several patterns to argue compliance with the EMCD corresponding to various argumentation strategies. Manufacturers can easily reuse and adapt the proposed patterns to the specifics of their equipment. Together, the different patterns provide a detailed overview of the steps to be followed in the progress toward the equipment’s declaration of conformity. As a practical example, the proposed patterns are applied to the use case of a power drive system inside an air compressor.
{"title":"Applying the Goal Structuring Notation (GSN) to Argue Compliance of Equipment With the European EMC Directive","authors":"Vikas Ghatge;Laure Buysse;Dries Vanoost;Johan Catrysse;Davy Pissoort","doi":"10.1109/LEMCPA.2023.3284229","DOIUrl":"10.1109/LEMCPA.2023.3284229","url":null,"abstract":"This letter illustrates the use of a graphical argumentation notation, more specifically, the goal structuring notation, to document and represent the different elements in the overall argumentation of why a piece of equipment is deemed to comply with the essential requirements of the EMC directive (EMCD). Such a graphical argumentation notation helps to overcome the significant bottlenecks of a pure-text-based approach by presenting the different elements of the argumentation in a clear and easy-to-understand visual format. This letter proposes several patterns to argue compliance with the EMCD corresponding to various argumentation strategies. Manufacturers can easily reuse and adapt the proposed patterns to the specifics of their equipment. Together, the different patterns provide a detailed overview of the steps to be followed in the progress toward the equipment’s declaration of conformity. As a practical example, the proposed patterns are applied to the use case of a power drive system inside an air compressor.","PeriodicalId":100625,"journal":{"name":"IEEE Letters on Electromagnetic Compatibility Practice and Applications","volume":"5 4","pages":"113-121"},"PeriodicalIF":0.0,"publicationDate":"2023-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84668270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Compliance of lone equipment with the electromagnetic compatibility (EMC) standards does not directly result in proper operation when used on the system level, especially in large and complex structures. A more robust way to incorporate possible unwanted behaviors and unpredicted scenarios is to expand the EMC testing by adopting the risk-based EMC approach. This letter addresses an electromagnetic interference (EMI) case caused by a differential mode voltage excitation on a cable harness of an electric scooter focusing on the first step of an EMC assessment procedure, which is the EMI vulnerability investigation. The objective of this research is to detect and expose the vulnerability of a real case study caused by an uncommon cause. This is done by a vector network analyzer measurement and the direct power injection method. The goal of this research is to demonstrate the importance of adopting a risk-based EMC approach while performing EMC testing.
{"title":"Fast and Curious: Exposure of EMI Vulnerability of an Electric Scooter for a Risk-Based EMC Approach","authors":"Vasiliki Gkatsi;Robert Vogt-Ardatjew;Frank Leferink","doi":"10.1109/LEMCPA.2023.3284232","DOIUrl":"https://doi.org/10.1109/LEMCPA.2023.3284232","url":null,"abstract":"Compliance of lone equipment with the electromagnetic compatibility (EMC) standards does not directly result in proper operation when used on the system level, especially in large and complex structures. A more robust way to incorporate possible unwanted behaviors and unpredicted scenarios is to expand the EMC testing by adopting the risk-based EMC approach. This letter addresses an electromagnetic interference (EMI) case caused by a differential mode voltage excitation on a cable harness of an electric scooter focusing on the first step of an EMC assessment procedure, which is the EMI vulnerability investigation. The objective of this research is to detect and expose the vulnerability of a real case study caused by an uncommon cause. This is done by a vector network analyzer measurement and the direct power injection method. The goal of this research is to demonstrate the importance of adopting a risk-based EMC approach while performing EMC testing.","PeriodicalId":100625,"journal":{"name":"IEEE Letters on Electromagnetic Compatibility Practice and Applications","volume":"5 3","pages":"82-86"},"PeriodicalIF":0.0,"publicationDate":"2023-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/8566057/10260712/10146385.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67868214","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 : 2023-04-26DOI: 10.1109/LEMCPA.2023.3270405
Shaoyin He;Bohao Zhang;Xiaojun Ni;Peng Qiu;Yu Song;Liang Song
In this letter, a nanosecond-level transient electric field (E-field) sensor based on a monopole electrically small rod antenna is proposed. The working principle and design process of the sensor are analyzed in detail while a finite-element simulation is carried out to verify the response characteristics of the sensor both in time and frequency domains, whose upper cut-off frequency can reach 680 MHz. For the purpose of assessing the actual detection capability of the sensor in HVDC converter stations, the sensor designed in this letter was used to detect the transient radiation E-field in the valve hall during the artificial short-circuit test in the Zhoushan ±200-kV five-terminal flexible dc transmission project. The measurement results of the transient E-field indicates that the sensor is able to respond instantaneously to the radiated E-field generated by the operation of the key power electronic equipment in the valve hall. It demonstrates that the designed sensor can be effectively applied in the scenario of the measurement of transient electromagnetic environment and noninvasive situational awareness technology for high-voltage devices in HVDC systems.
{"title":"Design of Nanosecond-Level Transient Electric Field Sensor and Its Application in HVDC Converter Station","authors":"Shaoyin He;Bohao Zhang;Xiaojun Ni;Peng Qiu;Yu Song;Liang Song","doi":"10.1109/LEMCPA.2023.3270405","DOIUrl":"https://doi.org/10.1109/LEMCPA.2023.3270405","url":null,"abstract":"In this letter, a nanosecond-level transient electric field (E-field) sensor based on a monopole electrically small rod antenna is proposed. The working principle and design process of the sensor are analyzed in detail while a finite-element simulation is carried out to verify the response characteristics of the sensor both in time and frequency domains, whose upper cut-off frequency can reach 680 MHz. For the purpose of assessing the actual detection capability of the sensor in HVDC converter stations, the sensor designed in this letter was used to detect the transient radiation E-field in the valve hall during the artificial short-circuit test in the Zhoushan ±200-kV five-terminal flexible dc transmission project. The measurement results of the transient E-field indicates that the sensor is able to respond instantaneously to the radiated E-field generated by the operation of the key power electronic equipment in the valve hall. It demonstrates that the designed sensor can be effectively applied in the scenario of the measurement of transient electromagnetic environment and noninvasive situational awareness technology for high-voltage devices in HVDC systems.","PeriodicalId":100625,"journal":{"name":"IEEE Letters on Electromagnetic Compatibility Practice and Applications","volume":"5 2","pages":"57-61"},"PeriodicalIF":0.0,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67861416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The maximum electromagnetic (EM) coupling is directly related to the polarization angle of the incident field in the high-altitude EM pulse (HEMP) illumination test. Aimed at the linear system, this letter analyzed the test error of the maximum coupling corresponding to the change of the angle between the polarization direction and the direction of the equipment under test (EUT) in EMP illumination tests. Characterized by the EM norm, the quantization estimation formula of the maximum coupling test error under illuminations with EUT rotations is deduced. The results show that the maximum measurement accuracy is the cosine of 1/2 of the maximum rotation angle of the EUTs. Finally, a test scheme of five illuminations (with rotations of the EUT and the rotation angle of each rotation is 36°) with 95% test accuracy of the maximum coupling of the method itself is recommended in this letter. The results can provide support for the design and evaluation of the EM illumination test.
{"title":"Error Analysis of the Maximum Coupling for HEMP Illumination Tests With EUT Rotations","authors":"Yuewu Shi;Xin Nie;Yifu Zhou;Zhizhen Zhu;Wei Chen;Wei Wu","doi":"10.1109/LEMCPA.2023.3267741","DOIUrl":"https://doi.org/10.1109/LEMCPA.2023.3267741","url":null,"abstract":"The maximum electromagnetic (EM) coupling is directly related to the polarization angle of the incident field in the high-altitude EM pulse (HEMP) illumination test. Aimed at the linear system, this letter analyzed the test error of the maximum coupling corresponding to the change of the angle between the polarization direction and the direction of the equipment under test (EUT) in EMP illumination tests. Characterized by the EM norm, the quantization estimation formula of the maximum coupling test error under illuminations with EUT rotations is deduced. The results show that the maximum measurement accuracy is the cosine of 1/2 of the maximum rotation angle of the EUTs. Finally, a test scheme of five illuminations (with rotations of the EUT and the rotation angle of each rotation is 36°) with 95% test accuracy of the maximum coupling of the method itself is recommended in this letter. The results can provide support for the design and evaluation of the EM illumination test.","PeriodicalId":100625,"journal":{"name":"IEEE Letters on Electromagnetic Compatibility Practice and Applications","volume":"5 2","pages":"48-52"},"PeriodicalIF":0.0,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68028303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-10DOI: 10.1109/LEMCPA.2023.3265771
Krzysztof Sieczkarek;Adam Maćkowiak
The conditions of measurement of radio disturbance emission are defined in the EN 55016-2-3 standard. It defines the detailed requirements of the measuring system and the methodology of the test. In case of the measurement up to 1 GHz, the antenna height scan is required but there is no regulation regarding the antenna tilt in the current edition of standard. As a result, most laboratories perform measurements of radiated emission with a fixed antenna angle of 0°—the antenna is located in parallel with the ground plane despite the actual height. Knowing that the antenna inclination angle in relation to the emission source affects its characteristics, it can lead to omit the measurement configuration at which the measured field strength is the highest. This letter investigates the influence of receiving antenna inclination angle on measurements of radiated disturbances from a reference emission source and real TV-set.
EN 55016-2-3标准规定了无线电干扰发射的测量条件。它定义了测量系统的详细要求和测试方法。在测量高达1GHz的情况下，需要进行天线高度扫描，但当前版本的标准中没有关于天线倾斜的规定。因此，大多数实验室在固定的天线角度为0°的情况下进行辐射发射测量——无论实际高度如何，天线都与地平面平行。已知天线相对于发射源的倾斜角度会影响其特性，这可能导致省略测量场强最高的测量配置。本文研究了接收天线倾角对参考发射源和实际电视机辐射干扰测量的影响。
{"title":"Impact of Antenna Tilt on Measurements Below 1 GHz in Semi-Anechoic Chamber","authors":"Krzysztof Sieczkarek;Adam Maćkowiak","doi":"10.1109/LEMCPA.2023.3265771","DOIUrl":"https://doi.org/10.1109/LEMCPA.2023.3265771","url":null,"abstract":"The conditions of measurement of radio disturbance emission are defined in the EN 55016-2-3 standard. It defines the detailed requirements of the measuring system and the methodology of the test. In case of the measurement up to 1 GHz, the antenna height scan is required but there is no regulation regarding the antenna tilt in the current edition of standard. As a result, most laboratories perform measurements of radiated emission with a fixed antenna angle of 0°—the antenna is located in parallel with the ground plane despite the actual height. Knowing that the antenna inclination angle in relation to the emission source affects its characteristics, it can lead to omit the measurement configuration at which the measured field strength is the highest. This letter investigates the influence of receiving antenna inclination angle on measurements of radiated disturbances from a reference emission source and real TV-set.","PeriodicalId":100625,"journal":{"name":"IEEE Letters on Electromagnetic Compatibility Practice and Applications","volume":"5 2","pages":"37-40"},"PeriodicalIF":0.0,"publicationDate":"2023-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67861418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-30DOI: 10.1109/LEMCPA.2023.3281506
V. Havryliuk
The problem of ensuring the electromagnetic compatibility (EMC) of the traction network with railway signaling lines is of practical interest, since electromagnetic interference (EMI) from the traction network can cause malfunctions in the signaling systems. In order to ensure the EMC of traction current with track circuits, which are widely used as track vacancy sensors in front of a moving train, EMI in rails is periodically monitored in accordance with their maintenance schedule, which makes it possible to detect excessive increases in the level of interference in the rails in a timely manner and prevent possible failures in signaling systems. The problem of developing embedded systems for continuous monitoring of harmonics in the traction network lies in the need to ensure the necessary measurement accuracy of the interference monitoring system for a traction network in accordance with the strict requirements of standards. The correct choice of control system parameters is difficult because the traction current is a nonstationary random process. In addition, the alternating traction current has a large dynamic range of harmonic values, with their proximity to each other and to a powerful fundamental harmonic, as well as the limitations inherent in the discrete Fourier transform, associated with the impossibility of simultaneously improving the accuracy of measurements in the time and frequency domains. This leads to the need for compromises when choosing the parameters of the monitoring system. The work is devoted to the practice of applying the theory of analog-to-digital conversion and the windowed Fourier transform to develop a technique for correctly choosing the parameters of an EMI monitoring system for traction lines.
{"title":"Choice of the Parameters of an EMI Monitoring System for an AC Traction Network","authors":"V. Havryliuk","doi":"10.1109/LEMCPA.2023.3281506","DOIUrl":"https://doi.org/10.1109/LEMCPA.2023.3281506","url":null,"abstract":"The problem of ensuring the electromagnetic compatibility (EMC) of the traction network with railway signaling lines is of practical interest, since electromagnetic interference (EMI) from the traction network can cause malfunctions in the signaling systems. In order to ensure the EMC of traction current with track circuits, which are widely used as track vacancy sensors in front of a moving train, EMI in rails is periodically monitored in accordance with their maintenance schedule, which makes it possible to detect excessive increases in the level of interference in the rails in a timely manner and prevent possible failures in signaling systems. The problem of developing embedded systems for continuous monitoring of harmonics in the traction network lies in the need to ensure the necessary measurement accuracy of the interference monitoring system for a traction network in accordance with the strict requirements of standards. The correct choice of control system parameters is difficult because the traction current is a nonstationary random process. In addition, the alternating traction current has a large dynamic range of harmonic values, with their proximity to each other and to a powerful fundamental harmonic, as well as the limitations inherent in the discrete Fourier transform, associated with the impossibility of simultaneously improving the accuracy of measurements in the time and frequency domains. This leads to the need for compromises when choosing the parameters of the monitoring system. The work is devoted to the practice of applying the theory of analog-to-digital conversion and the windowed Fourier transform to develop a technique for correctly choosing the parameters of an EMI monitoring system for traction lines.","PeriodicalId":100625,"journal":{"name":"IEEE Letters on Electromagnetic Compatibility Practice and Applications","volume":"5 3","pages":"77-81"},"PeriodicalIF":0.0,"publicationDate":"2023-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67868213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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