Pub Date : 1992-09-22DOI: 10.1109/ICHPS.1992.559021
A. Dmowski, J. Janczak, R. Bugyi
{"title":"Considerations For Compensation By Active Power Filters","authors":"A. Dmowski, J. Janczak, R. Bugyi","doi":"10.1109/ICHPS.1992.559021","DOIUrl":"https://doi.org/10.1109/ICHPS.1992.559021","url":null,"abstract":"","PeriodicalId":438464,"journal":{"name":"ICHPS V International Conference on Harmonics in Power Systems.","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129291858","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 : 1992-09-22DOI: 10.1109/ICHPS.1992.559003
G. Cokkinides, A. Meliopoulos
This paper presents a new model of multiphase underground cables for the mrnputation of harmonic impedana. The unique features of this model indude explicit representation of the grounding configuration and terminal; substation grounds, and the distribution earth currents. A segmentation method is employcd to compute the cable and earth current distribution. Other properties of the model arc: (1) aaura te frequency dependent parameter representation from DC to several MHz, (2) explicit modeling of asymmetries, and (3) high numerical efficiency. The model implementation is based on direct solution of the transmission line differential equations.
{"title":"Harmonic Sequence Impedance of Multiphase Underground Cables","authors":"G. Cokkinides, A. Meliopoulos","doi":"10.1109/ICHPS.1992.559003","DOIUrl":"https://doi.org/10.1109/ICHPS.1992.559003","url":null,"abstract":"This paper presents a new model of multiphase underground cables for the mrnputation of harmonic impedana. The unique features of this model indude explicit representation of the grounding configuration and terminal; substation grounds, and the distribution earth currents. A segmentation method is employcd to compute the cable and earth current distribution. Other properties of the model arc: (1) aaura te frequency dependent parameter representation from DC to several MHz, (2) explicit modeling of asymmetries, and (3) high numerical efficiency. The model implementation is based on direct solution of the transmission line differential equations.","PeriodicalId":438464,"journal":{"name":"ICHPS V International Conference on Harmonics in Power Systems.","volume":"170 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115181019","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 : 1992-09-22DOI: 10.1109/ICHPS.1992.558988
G. Heydt
The Fourier-based method of phasors is reformulated as an all-real calculation method which is based on the Hartley transform. In that transform, the all-real kernel cas (vt) is used rather than the familiar e/sup -jvt/ which is used in the Fourier transform. The concept of an all-real Hartley impedance is developed. The advantages and disadvantages of this alternate formulation are discussed. The method is applied to the calculation of harmonics in electric power distribution systems. >
{"title":"Systems Analysis Using Hartley Impedances","authors":"G. Heydt","doi":"10.1109/ICHPS.1992.558988","DOIUrl":"https://doi.org/10.1109/ICHPS.1992.558988","url":null,"abstract":"The Fourier-based method of phasors is reformulated as an all-real calculation method which is based on the Hartley transform. In that transform, the all-real kernel cas (vt) is used rather than the familiar e/sup -jvt/ which is used in the Fourier transform. The concept of an all-real Hartley impedance is developed. The advantages and disadvantages of this alternate formulation are discussed. The method is applied to the calculation of harmonics in electric power distribution systems. >","PeriodicalId":438464,"journal":{"name":"ICHPS V International Conference on Harmonics in Power Systems.","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124401241","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 : 1992-09-22DOI: 10.1109/ICHPS.1992.559040
M. Kuussaari
A statistical approach is used to evaluate the limits for harmonic currents in AC power lines, the goal being to prevent excessive telephone noise interference voltages in subscriber cables in rural areas. The analysis is based on a Monte Carlo simulation which takes into account the effect of the experimental probability distributions of the relevant parameters. It is shown that under Finnish conditions, the properties of communication cables permit equivalent disturbing phase currents of 8 to 10 A. The digital exchanges permit approximately the same currents. Some new telephone types that have a low balance may make it necessary to limit the currents to a level that is somewhat lower. >
{"title":"Statistical Evaluation Of Telephone Noise Interference Caused By AC Power Line Harmonic Currents","authors":"M. Kuussaari","doi":"10.1109/ICHPS.1992.559040","DOIUrl":"https://doi.org/10.1109/ICHPS.1992.559040","url":null,"abstract":"A statistical approach is used to evaluate the limits for harmonic currents in AC power lines, the goal being to prevent excessive telephone noise interference voltages in subscriber cables in rural areas. The analysis is based on a Monte Carlo simulation which takes into account the effect of the experimental probability distributions of the relevant parameters. It is shown that under Finnish conditions, the properties of communication cables permit equivalent disturbing phase currents of 8 to 10 A. The digital exchanges permit approximately the same currents. Some new telephone types that have a low balance may make it necessary to limit the currents to a level that is somewhat lower. >","PeriodicalId":438464,"journal":{"name":"ICHPS V International Conference on Harmonics in Power Systems.","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122498894","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 : 1992-09-22DOI: 10.1109/ICHPS.1992.559016
M. Begovic, P. Djurić, S. Dunlap, A. Phadke
Three new techniques for frequency measurement are prw posed in the paper. The first is a modified zero aoshing method using curve fitting of voltage samplar. The second method is based on polynomial fitting of the DFT quasistationary phasor data for calculation of the rate of change of the positive sequence phase angle. The third method o p erateh on a complex signal obtained by the standard kchnique of quadrature demodulation. All three methods AX characterized by immunity to reasonable unounts of noise m d harmonics in power systems. The performance of the proposed techniques is illustrated on several scenarios by computer simulation.
{"title":"Frequency Tracking In Power Networks Of Harmonics","authors":"M. Begovic, P. Djurić, S. Dunlap, A. Phadke","doi":"10.1109/ICHPS.1992.559016","DOIUrl":"https://doi.org/10.1109/ICHPS.1992.559016","url":null,"abstract":"Three new techniques for frequency measurement are prw posed in the paper. The first is a modified zero aoshing method using curve fitting of voltage samplar. The second method is based on polynomial fitting of the DFT quasistationary phasor data for calculation of the rate of change of the positive sequence phase angle. The third method o p erateh on a complex signal obtained by the standard kchnique of quadrature demodulation. All three methods AX characterized by immunity to reasonable unounts of noise m d harmonics in power systems. The performance of the proposed techniques is illustrated on several scenarios by computer simulation.","PeriodicalId":438464,"journal":{"name":"ICHPS V International Conference on Harmonics in Power Systems.","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127042323","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 : 1992-09-22DOI: 10.1109/ICHPS.1992.559029
Dr. Arslan Ahmed Amin, J. E. Steelman, S. Ranade
A modification to conventional harmonic filters used in HMC Stations and similar equipment is proposed. A rectifier is used to recover energy from several tuned filters. and the amount of energy recovered controls filter quality Q. n r ~ h a M a C Thus. low+ filters can be desimed without the VoftagaSourra Two-Winding Transformer I Nonllnear Load attendant power losses. Such f i l t e rs are desirable from the point of view of simplicity, robustness. and stability. The 'minimum losses filter' concept is explained through simulation studies of operating characteristics and Its application to an existing HYDC terminal.
对HMC台站及类似设备中使用的传统谐波滤波器进行了改进。整流器用于从几个调谐滤波器中回收能量。能量回收量控制滤波质量Q. n r ~ h a M a C。低+滤波器可以在设计时不需要VoftagaSourra双绕组变压器I非线性近负载伴随的功率损耗。从简单性和健壮性的角度来看，这样的方法是可取的。和稳定性。通过对运行特性的仿真研究，阐述了“最小损耗滤波器”的概念及其在现有水电枢纽终端上的应用。
{"title":"Innovative Filter Concept For Power System Harmonics","authors":"Dr. Arslan Ahmed Amin, J. E. Steelman, S. Ranade","doi":"10.1109/ICHPS.1992.559029","DOIUrl":"https://doi.org/10.1109/ICHPS.1992.559029","url":null,"abstract":"A modification to conventional harmonic filters used in HMC Stations and similar equipment is proposed. A rectifier is used to recover energy from several tuned filters. and the amount of energy recovered controls filter quality Q. n r ~ h a M a C Thus. low+ filters can be desimed without the VoftagaSourra Two-Winding Transformer I Nonllnear Load attendant power losses. Such f i l t e rs are desirable from the point of view of simplicity, robustness. and stability. The 'minimum losses filter' concept is explained through simulation studies of operating characteristics and Its application to an existing HYDC terminal.","PeriodicalId":438464,"journal":{"name":"ICHPS V International Conference on Harmonics in Power Systems.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130117255","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 : 1992-09-22DOI: 10.1109/ICHPS.1992.558991
A. de Oliveira, J. C. de Oliveira, P. Ribeiro
This article presents the results of the developments of compact low cost instrumentation to identify, and evaluate harmonic distortions in electrical power systems. First a sensor of the total voltage or current harmonic distortion is described. This provides the first information on the state of the power quality. The fundamentals and prototype performance results of a harmonic flow direction detector is also discussed. Next a selective harmonic analyzer is described. Finally, an instrument for harmonic impedance measurements is discussed. Adequacy, portability, the use of simplified techniques, reliability, accuracy and low costs of the prototypes are discussed in this paper.
{"title":"Developments In Instrumentation For Harmonic Distortion Monitoring And Measurement","authors":"A. de Oliveira, J. C. de Oliveira, P. Ribeiro","doi":"10.1109/ICHPS.1992.558991","DOIUrl":"https://doi.org/10.1109/ICHPS.1992.558991","url":null,"abstract":"This article presents the results of the developments of compact low cost instrumentation to identify, and evaluate harmonic distortions in electrical power systems. First a sensor of the total voltage or current harmonic distortion is described. This provides the first information on the state of the power quality. The fundamentals and prototype performance results of a harmonic flow direction detector is also discussed. Next a selective harmonic analyzer is described. Finally, an instrument for harmonic impedance measurements is discussed. Adequacy, portability, the use of simplified techniques, reliability, accuracy and low costs of the prototypes are discussed in this paper.","PeriodicalId":438464,"journal":{"name":"ICHPS V International Conference on Harmonics in Power Systems.","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132128164","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 : 1992-09-22DOI: 10.1109/ICHPS.1992.558989
Allan Miller, M. Dewe
The concepts of filtering and sampling power system voltage and current signals for harmonic analysis using the fast Fourier transform (FFT) algorithm are introduced. The application of a multirate digital signal processing technique to harmonic analysis is then discussed, and the design of a polyphase decimation finite-impulse response (FIR) filter, for use as an antialiasing filter in oversampling applications, is covered. The implementation of this filter in conjunction with an FFT by a digital signal processor is described, and results of timing tests on the algorithms are presented. The instrument used to implement these techniques is an advanced data acquisition and parallel processing system aimed specifically at continuous real-time power system signal monitoring. >
{"title":"The Application Of Multi-Rate Digital Signal Processing Techniques To The Measurement Of Power System Harmonic Levels","authors":"Allan Miller, M. Dewe","doi":"10.1109/ICHPS.1992.558989","DOIUrl":"https://doi.org/10.1109/ICHPS.1992.558989","url":null,"abstract":"The concepts of filtering and sampling power system voltage and current signals for harmonic analysis using the fast Fourier transform (FFT) algorithm are introduced. The application of a multirate digital signal processing technique to harmonic analysis is then discussed, and the design of a polyphase decimation finite-impulse response (FIR) filter, for use as an antialiasing filter in oversampling applications, is covered. The implementation of this filter in conjunction with an FFT by a digital signal processor is described, and results of timing tests on the algorithms are presented. The instrument used to implement these techniques is an advanced data acquisition and parallel processing system aimed specifically at continuous real-time power system signal monitoring. >","PeriodicalId":438464,"journal":{"name":"ICHPS V International Conference on Harmonics in Power Systems.","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123727710","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 : 1992-09-22DOI: 10.1109/ICHPS.1992.558997
P. Ribeiro, L. Fonseca
{"title":"Considerations On The Accuracy Of Three-Phase Harmonic Penetration Studies in Transmission Systems: A Case Study","authors":"P. Ribeiro, L. Fonseca","doi":"10.1109/ICHPS.1992.558997","DOIUrl":"https://doi.org/10.1109/ICHPS.1992.558997","url":null,"abstract":"","PeriodicalId":438464,"journal":{"name":"ICHPS V International Conference on Harmonics in Power Systems.","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114526393","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 : 1992-09-22DOI: 10.1109/ICHPS.1992.558999
S.M. Williams, G. Brownfield, J.W. Duffus
Increasing use of power electronic loads on distribution feeders together with greater use of power factor correction capacitors on the distribution system can result in poor operating conditions in the form of high harmonic levels propagating through a distribution system. HARMFLO (Harmonic Power Flow Study Program) was developed by EPRI (Electric Power Research Institute) for use in the analysis of harmonics on a power system. However, for a typical analysis of a distribution system, data for some of the parameters required by HARMFLO are not available. Furthermore, exact load information is usually not available. Harmonic levels determined from field tests on a distribution system are compared to results of HARMFLO simulations to determine if this analysis tool can provide useful results despite the lack of exact information for load modeling and other system parameters. >
{"title":"Harmonic Propagation On An Electric Distribution System: Fleld Measurements Compared With Computer Simulation","authors":"S.M. Williams, G. Brownfield, J.W. Duffus","doi":"10.1109/ICHPS.1992.558999","DOIUrl":"https://doi.org/10.1109/ICHPS.1992.558999","url":null,"abstract":"Increasing use of power electronic loads on distribution feeders together with greater use of power factor correction capacitors on the distribution system can result in poor operating conditions in the form of high harmonic levels propagating through a distribution system. HARMFLO (Harmonic Power Flow Study Program) was developed by EPRI (Electric Power Research Institute) for use in the analysis of harmonics on a power system. However, for a typical analysis of a distribution system, data for some of the parameters required by HARMFLO are not available. Furthermore, exact load information is usually not available. Harmonic levels determined from field tests on a distribution system are compared to results of HARMFLO simulations to determine if this analysis tool can provide useful results despite the lack of exact information for load modeling and other system parameters. >","PeriodicalId":438464,"journal":{"name":"ICHPS V International Conference on Harmonics in Power Systems.","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114965983","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：