Pub Date : 2012-05-21DOI: 10.1109/APEMC.2012.6237916
K. Yamamoto, J. Niihara, S. Yanagawa
Accidents caused by natural phenomena such as lightning and typhoons are serious problems for the wind power generation facilities. In particular, lightning damage to facilities inside or in the vicinity of wind turbines are remarkably common. Most of the breakdowns and malfunctions of the electrical and control systems are caused by a ground potential rise due to lightning current flowing into the grounding system of the wind turbine. To clarify the transient characteristics of the wind turbine grounding systems and to understand the mechanism of the breakdowns and malfunctions, the grounding characteristic have been measured. The grounding characteristics have also been verified using the FDTD (finite-difference time-domain) method.
{"title":"Grounding characteristics of a wind turbine measured immediately after its undergrounding","authors":"K. Yamamoto, J. Niihara, S. Yanagawa","doi":"10.1109/APEMC.2012.6237916","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237916","url":null,"abstract":"Accidents caused by natural phenomena such as lightning and typhoons are serious problems for the wind power generation facilities. In particular, lightning damage to facilities inside or in the vicinity of wind turbines are remarkably common. Most of the breakdowns and malfunctions of the electrical and control systems are caused by a ground potential rise due to lightning current flowing into the grounding system of the wind turbine. To clarify the transient characteristics of the wind turbine grounding systems and to understand the mechanism of the breakdowns and malfunctions, the grounding characteristic have been measured. The grounding characteristics have also been verified using the FDTD (finite-difference time-domain) method.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128047273","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 : 2012-05-21DOI: 10.1109/APEMC.2012.6237870
D. Darwanto, T. S. Rumdy, D. Hamdani
Indonesia is situated at region with relative high keraunic level in the world. It is often reported that a lot of energy exploration companies in the region suffer from interference effects of the tropical atmospheric electricity as false alarm in companies' instrumentation system leading to malfunction. This paper presents an integrated framework of lightning protection system for instrumentation systems of geothermal power plant. The proposed framework is based on electromagnetic compatibility (EMC) and derived from our best practice in the field, which is proven as failure-free during period of relative high lightning activity.
{"title":"EMC based lightning protection systems for instrumentation systems of geothermal power plant","authors":"D. Darwanto, T. S. Rumdy, D. Hamdani","doi":"10.1109/APEMC.2012.6237870","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237870","url":null,"abstract":"Indonesia is situated at region with relative high keraunic level in the world. It is often reported that a lot of energy exploration companies in the region suffer from interference effects of the tropical atmospheric electricity as false alarm in companies' instrumentation system leading to malfunction. This paper presents an integrated framework of lightning protection system for instrumentation systems of geothermal power plant. The proposed framework is based on electromagnetic compatibility (EMC) and derived from our best practice in the field, which is proven as failure-free during period of relative high lightning activity.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129925866","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 : 2012-05-21DOI: 10.1109/APEMC.2012.6237799
C. Jettanasen
Different traditional and/or novel techniques can be applied to reduce or eliminate electromagnetic interference (EMI) emissions, which are nowadays a great concern in electrical/electronic applications. Both conducted and radiated noise emissions cause a number of severe EMI problems. That is why this paper is aimed to study different PWM strategies to restrict or overcome these problems; especially those from the common-mode (CM) conducted noise. The simulated results show that the active vector strategy is a good PWM technique for PWM voltage-source inverter, which is broadly used in adjustable-speed AC motor drive. The effect of dead time of PWM signals is also investigated and discussed.
{"title":"Reduction of common-mode voltage generated by voltage-source inverter using proper PWM strategy","authors":"C. Jettanasen","doi":"10.1109/APEMC.2012.6237799","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237799","url":null,"abstract":"Different traditional and/or novel techniques can be applied to reduce or eliminate electromagnetic interference (EMI) emissions, which are nowadays a great concern in electrical/electronic applications. Both conducted and radiated noise emissions cause a number of severe EMI problems. That is why this paper is aimed to study different PWM strategies to restrict or overcome these problems; especially those from the common-mode (CM) conducted noise. The simulated results show that the active vector strategy is a good PWM technique for PWM voltage-source inverter, which is broadly used in adjustable-speed AC motor drive. The effect of dead time of PWM signals is also investigated and discussed.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130486688","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 : 2012-05-21DOI: 10.1109/APEMC.2012.6238009
S. Braun, P. Russer
Measurements of electromagnetic interference in time-domain allow to reduce the scan time by several orders of magnitude, in comparison to automated scans performed by the tuned selective voltmeters, which are known as EMI receivers. Spectrum analyzer are used for fast sweeps to get an overview. Such analyzers can perform fast sweeps or scans over large bands. With the update of CISPR 16-1-1 Ed 3.1 the requirements for time-domain EMI measurement systems have been described. These time-domain EMI measurement systems are using the short-time fast Fourier transform to simulate a set of up to 4000 receivers simultaneously. A major requirement is the gapless aquisition during the dwell time. In this paper the requirements and solutions for time-domain measurements are discussed. A major requirement is the gapless processing of the input signal. This requirement is mandatory to detect over the observation time an isolated impulse. Further requirements are IF-filter bandwidths and indication in the various detector modes for different pulse repetition frequencies as well as the dynamic range. In this paper also the requirements regarding calibration are discussed. It is shown that time-domain measurement system can be used for the accurate measurement for a full compliance final measurement and also for ultra fast sweeps, replacing spectrum analyzers. In both cases the sweep and scantimes are reduced.
与被称为EMI接收器的调谐选择电压表进行的自动扫描相比，在时域中电磁干扰的测量允许将扫描时间减少几个数量级。频谱分析仪用于快速扫描，以获得概述。这种分析仪可以在大波段进行快速扫描或扫描。随着CISPR 16-1-1 Ed 3.1的更新，对时域EMI测量系统的要求进行了描述。这些时域电磁干扰测量系统使用短时快速傅立叶变换同时模拟一组多达4000个接收机。一个主要的要求是在停留时间内的无间隙采集。本文讨论了时域测量的要求和解决方法。一个主要的要求是输入信号的无间隙处理。这一要求对于在观测时间内检测孤立脉冲是强制性的。进一步的要求是中频滤波器带宽和在不同脉冲重复频率以及动态范围的各种检测器模式下的指示。本文还讨论了校准方面的要求。结果表明，时域测量系统可以代替频谱分析仪进行精确测量，实现完全符合要求的最终测量，也可以实现超快速扫描。在这两种情况下，扫描和扫描时间都减少了。
{"title":"Requirements and solutions for emission measurements in time-domain according to international EMC standards","authors":"S. Braun, P. Russer","doi":"10.1109/APEMC.2012.6238009","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6238009","url":null,"abstract":"Measurements of electromagnetic interference in time-domain allow to reduce the scan time by several orders of magnitude, in comparison to automated scans performed by the tuned selective voltmeters, which are known as EMI receivers. Spectrum analyzer are used for fast sweeps to get an overview. Such analyzers can perform fast sweeps or scans over large bands. With the update of CISPR 16-1-1 Ed 3.1 the requirements for time-domain EMI measurement systems have been described. These time-domain EMI measurement systems are using the short-time fast Fourier transform to simulate a set of up to 4000 receivers simultaneously. A major requirement is the gapless aquisition during the dwell time. In this paper the requirements and solutions for time-domain measurements are discussed. A major requirement is the gapless processing of the input signal. This requirement is mandatory to detect over the observation time an isolated impulse. Further requirements are IF-filter bandwidths and indication in the various detector modes for different pulse repetition frequencies as well as the dynamic range. In this paper also the requirements regarding calibration are discussed. It is shown that time-domain measurement system can be used for the accurate measurement for a full compliance final measurement and also for ultra fast sweeps, replacing spectrum analyzers. In both cases the sweep and scantimes are reduced.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126338183","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 : 2012-05-21DOI: 10.1109/APEMC.2012.6237863
I. El Baba, S. Lalléchère, P. Bonnet, J. Benoit, F. Paladian
The aim of this paper is to compute the total scattering cross section (TSCS) of various targets from a three-dimensional numerical method in reverberation chamber (RC). From a practical point of view, the TSCS measurements combine both free-space environment and multi-stimulations (plane waves). The formalism followed in this contribution is dual and allows predicting the TSCS from few RC simulations. The theory and numerical results presented will show the capability of the method to compute the TSCS from Finite Integration Technique (FIT, CST Microwave Studio®) models. Finally, from electromagnetic compatibility (EMC) considerations, we will put the focus on the interest of the stirrer TSCS.
{"title":"Computing total scattering cross section from 3-D reverberation chambers time modeling","authors":"I. El Baba, S. Lalléchère, P. Bonnet, J. Benoit, F. Paladian","doi":"10.1109/APEMC.2012.6237863","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237863","url":null,"abstract":"The aim of this paper is to compute the total scattering cross section (TSCS) of various targets from a three-dimensional numerical method in reverberation chamber (RC). From a practical point of view, the TSCS measurements combine both free-space environment and multi-stimulations (plane waves). The formalism followed in this contribution is dual and allows predicting the TSCS from few RC simulations. The theory and numerical results presented will show the capability of the method to compute the TSCS from Finite Integration Technique (FIT, CST Microwave Studio®) models. Finally, from electromagnetic compatibility (EMC) considerations, we will put the focus on the interest of the stirrer TSCS.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129244256","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 : 2012-05-21DOI: 10.1109/APEMC.2012.6237995
S. Kwak, J. Jo, Soyoung Kim
In this paper, modeling and co-simulation methodology is proposed to predict EMI noise from the switching activity of on-chip interconnects. The proposed model includes the model for I/O driver and the on-chip interconnect load, the PKG and the test PCB, and the conducted and radiated EMI simulation. Using the simulation results of the proposed model, the I/O driver and the interconnect design can be optimized for minimum chip level EMI noise.
{"title":"Modeling and co-simulation of I/O interconnects for on-chip and off-chip EMI prediction","authors":"S. Kwak, J. Jo, Soyoung Kim","doi":"10.1109/APEMC.2012.6237995","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237995","url":null,"abstract":"In this paper, modeling and co-simulation methodology is proposed to predict EMI noise from the switching activity of on-chip interconnects. The proposed model includes the model for I/O driver and the on-chip interconnect load, the PKG and the test PCB, and the conducted and radiated EMI simulation. Using the simulation results of the proposed model, the I/O driver and the interconnect design can be optimized for minimum chip level EMI noise.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122565654","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 : 2012-05-21DOI: 10.1109/APEMC.2012.6237889
M. Faisal, A. Mohamed
This paper presents the application of signal processing and artificial intelligence techniques for performing automated power quality (PQ) diagnosis. This new diagnosis system is named as the Power Quality Diagnostic System or PQDS. The PQDS is developed using the S-Transform (ST) and the Support Vector Regression (SVR) techniques. The PQDS has been successfully implemented in Malaysia and has assisted the power utility's engineers in verifying the types, sources and causes of the recorded PQ disturbances by the online power quality monitoring system (PQMS). The PQDS gave perfect (100%) accuracy in diagnosing voltage sags.
{"title":"Application of computational intelligence for diagnosing Power Quality disturbances","authors":"M. Faisal, A. Mohamed","doi":"10.1109/APEMC.2012.6237889","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237889","url":null,"abstract":"This paper presents the application of signal processing and artificial intelligence techniques for performing automated power quality (PQ) diagnosis. This new diagnosis system is named as the Power Quality Diagnostic System or PQDS. The PQDS is developed using the S-Transform (ST) and the Support Vector Regression (SVR) techniques. The PQDS has been successfully implemented in Malaysia and has assisted the power utility's engineers in verifying the types, sources and causes of the recorded PQ disturbances by the online power quality monitoring system (PQMS). The PQDS gave perfect (100%) accuracy in diagnosing voltage sags.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122784296","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 : 2012-05-21DOI: 10.1109/APEMC.2012.6238019
Penghui Chen, Xiaojian Xu, Q. Zeng, M. Yagoub
The total-field scattered-field (TFSF) finite-difference time-domain (FDTD) method is introduced to analyze of waves in stratified lossy dispersive media. Our numerical results show an excellent agreement with the analytical results, validating the correctness and effectiveness of this method. In addition, the numerical result for an arbitrary incident angle can be provided with this method, greatly extending some previous work that only analyzed the case of normal incidence.
{"title":"Time domain analysis of waves in layered lossy dispersive media","authors":"Penghui Chen, Xiaojian Xu, Q. Zeng, M. Yagoub","doi":"10.1109/APEMC.2012.6238019","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6238019","url":null,"abstract":"The total-field scattered-field (TFSF) finite-difference time-domain (FDTD) method is introduced to analyze of waves in stratified lossy dispersive media. Our numerical results show an excellent agreement with the analytical results, validating the correctness and effectiveness of this method. In addition, the numerical result for an arbitrary incident angle can be provided with this method, greatly extending some previous work that only analyzed the case of normal incidence.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117344591","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 : 2012-05-21DOI: 10.1109/APEMC.2012.6238026
Kexin Wei, Bin Liang
This paper researches differential mode (DM) conducted electromagnetic interference (EMI) in rectifier. The derivation and analysis of interference source generated by power electronic switches is given. Based on experimental and theoretical analysis, the conducted EMI of a three-phase rectifier is studied systematically. The study shows that conducted EMI are presented centrally at the integral times of its PWM controlling frequency and the conducted EMI decreases with the increase of frequency. By the experiment, DM EMI between 0kHz to 30MHz is studied. And the EMI spectrum in 0~500kHz, and 500kHz~30MHz are compared respectively. Furthermore, the rule of DM EMI with the change of the resistive loads is summarized. The study shows that it changes with resistive loads, and the DM EMI boosts up with the load drop, especially in low frequency bandwidth. In high frequency bandwidth, the effect of change of the resistive load on the DM EMI is not obvious because of the capacitance.
{"title":"Research on differential mode conducted EMI in power converter","authors":"Kexin Wei, Bin Liang","doi":"10.1109/APEMC.2012.6238026","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6238026","url":null,"abstract":"This paper researches differential mode (DM) conducted electromagnetic interference (EMI) in rectifier. The derivation and analysis of interference source generated by power electronic switches is given. Based on experimental and theoretical analysis, the conducted EMI of a three-phase rectifier is studied systematically. The study shows that conducted EMI are presented centrally at the integral times of its PWM controlling frequency and the conducted EMI decreases with the increase of frequency. By the experiment, DM EMI between 0kHz to 30MHz is studied. And the EMI spectrum in 0~500kHz, and 500kHz~30MHz are compared respectively. Furthermore, the rule of DM EMI with the change of the resistive loads is summarized. The study shows that it changes with resistive loads, and the DM EMI boosts up with the load drop, especially in low frequency bandwidth. In high frequency bandwidth, the effect of change of the resistive load on the DM EMI is not obvious because of the capacitance.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132498581","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 : 2012-05-21DOI: 10.1109/APEMC.2012.6237875
Shih-Yi Yuan, We-Bing Su, Hao-Ping Ho
For the EMI optimization issue, different hardware-level technique had been proposed. These methods should be firstly considered as much as possible. However, component upgrading for ending machine is sometimes not so easy. Thus, software EMI optimization techniques are another alternative. This paper focuses on software-level technique EMI optimization. We design a code template matcher as an optimization tool to reduce conducted EMI. The experimental results show that the matcher can generate a minimum EMI assembly code (less than 8 dBuV) and can estimate the EMI impact of a program to an embedded system accurately on the target frequency (4MHz, the system operating frequency).
{"title":"A software technique for EMI optimization","authors":"Shih-Yi Yuan, We-Bing Su, Hao-Ping Ho","doi":"10.1109/APEMC.2012.6237875","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237875","url":null,"abstract":"For the EMI optimization issue, different hardware-level technique had been proposed. These methods should be firstly considered as much as possible. However, component upgrading for ending machine is sometimes not so easy. Thus, software EMI optimization techniques are another alternative. This paper focuses on software-level technique EMI optimization. We design a code template matcher as an optimization tool to reduce conducted EMI. The experimental results show that the matcher can generate a minimum EMI assembly code (less than 8 dBuV) and can estimate the EMI impact of a program to an embedded system accurately on the target frequency (4MHz, the system operating frequency).","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127196156","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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