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.1992.559031
J. Janczak, A. Emanuel
will be free of harmonic pollution and the compensator performs like an active filter. If in addition t o (3) the compensator can conx’ert active power, i.e., ic.l jL 0, in which case we deal with a n Active Power Line Conditioner [31. In many instances the compensator delivers or absorbs 60 Hz reactive current, i,, # 0, such tha t the line current i is nearly in phase with the fundamental component of the voltage, or can be made purposely to lag or lead the voltage. These concepts are implemented by monitoring the currents i ~ ~ j and ixr, and adjusting the compensator current waveform and magnitude such tha t i , ~ = -ih” and ;,I = i N , l . Recent studies [4,5,6,7] point out that in low and medium voltage systems with many small or medium sized nonlinear loads scattered among the network busses it is not feasible to compensate separately each nonlinear load. At the busses where a harmonic compensator is available it is more beneficial to use the compensator for the minimization of voltage distortion in the system. This s t r a t e g is the logical one, since in such systems i t is possible to monitor bus voltages but practically impossible to monitor the currents of a miriade of small linear loads. The distortion a t a certain bus with the voltage
{"title":"Adaptive Control Algorithm For Harmonic Compensators","authors":"J. Janczak, A. Emanuel","doi":"10.1109/ICHPS.1992.559031","DOIUrl":"https://doi.org/10.1109/ICHPS.1992.559031","url":null,"abstract":"will be free of harmonic pollution and the compensator performs like an active filter. If in addition t o (3) the compensator can conx’ert active power, i.e., ic.l jL 0, in which case we deal with a n Active Power Line Conditioner [31. In many instances the compensator delivers or absorbs 60 Hz reactive current, i,, # 0, such tha t the line current i is nearly in phase with the fundamental component of the voltage, or can be made purposely to lag or lead the voltage. These concepts are implemented by monitoring the currents i ~ ~ j and ixr, and adjusting the compensator current waveform and magnitude such tha t i , ~ = -ih” and ;,I = i N , l . Recent studies [4,5,6,7] point out that in low and medium voltage systems with many small or medium sized nonlinear loads scattered among the network busses it is not feasible to compensate separately each nonlinear load. At the busses where a harmonic compensator is available it is more beneficial to use the compensator for the minimization of voltage distortion in the system. This s t r a t e g is the logical one, since in such systems i t is possible to monitor bus voltages but practically impossible to monitor the currents of a miriade of small linear loads. The distortion a t a certain bus with the voltage","PeriodicalId":438464,"journal":{"name":"ICHPS V International Conference on Harmonics in Power Systems.","volume":"8 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":"130299134","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.1992.559004
U. De Martinis, C. Fusco, F. Gagliardi, D. Lauria, D. Villacci
{"title":"On The Evaluation Of The Harmonic Impedances In AC/DC Systems","authors":"U. De Martinis, C. Fusco, F. Gagliardi, D. Lauria, D. Villacci","doi":"10.1109/ICHPS.1992.559004","DOIUrl":"https://doi.org/10.1109/ICHPS.1992.559004","url":null,"abstract":"","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":"124033199","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.1992.558998
Rao, Thallam, Scnior Mcmbcr, Salt River Projcct, W. Grady
The increasing application of power electronics in residential, commercial, and industrial loads is gradually increasing current and voltage distortion levels in distribution systems. This trend will accelerate il large loads such as air conditioners are. in the future, powered by electronic drive systems. The objective of this paper is to present the results of a simulation case study in which feeder distortion levels are predicted as adjustable-speeddrive (ASD) air Conditioners become an appreciable fraction of the total load.
{"title":"Estimating Future Harmonic Distortion Levels In Distribution Systems Due To Single-Phase Adjustable-Speed-Drive Air Conditioners: A Case Study","authors":"Rao, Thallam, Scnior Mcmbcr, Salt River Projcct, W. Grady","doi":"10.1109/ICHPS.1992.558998","DOIUrl":"https://doi.org/10.1109/ICHPS.1992.558998","url":null,"abstract":"The increasing application of power electronics in residential, commercial, and industrial loads is gradually increasing current and voltage distortion levels in distribution systems. This trend will accelerate il large loads such as air conditioners are. in the future, powered by electronic drive systems. The objective of this paper is to present the results of a simulation case study in which feeder distortion levels are predicted as adjustable-speeddrive (ASD) air Conditioners become an appreciable fraction of the total load.","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":"121040870","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.1992.558992
H. Beides, Fan Zhang, A. P. Sakis Meliopoulos
Accurate harmonic power flow studies rrquirr calculation of the steady state periodic solution for the network components rrprcsented in the studies. For components with switching sequence controls this task may be complex and computationally demanding. This paper presents a new and efficient method for computing the periodic steady state solution for components used in harmonic analysis. The method is based on state space representation of the components and optimal control theory. Results obtained from testing the method on a single-phase AC controller are prsented.
{"title":"A New Modeling Approach For Power System Harmonic Analysis","authors":"H. Beides, Fan Zhang, A. P. Sakis Meliopoulos","doi":"10.1109/ICHPS.1992.558992","DOIUrl":"https://doi.org/10.1109/ICHPS.1992.558992","url":null,"abstract":"Accurate harmonic power flow studies rrquirr calculation of the steady state periodic solution for the network components rrprcsented in the studies. For components with switching sequence controls this task may be complex and computationally demanding. This paper presents a new and efficient method for computing the periodic steady state solution for components used in harmonic analysis. The method is based on state space representation of the components and optimal control theory. Results obtained from testing the method on a single-phase AC controller are prsented.","PeriodicalId":438464,"journal":{"name":"ICHPS V International Conference on Harmonics in Power Systems.","volume":"27 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":"133970905","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.1992.559009
M. Depenbrock
A generally applicable method to analyse the relations connecting currents, voltages, instantaneous-, active-, nonactive- and apparent power quantities is described. By introducing a special m-conductor equivalent scheme an unified treatment of nonsinusoidaI, unbalanced polyphase systems is possible and a simple definition of unsymmetrical loads can be derived. It is explained why it is necessary to distinguish between the decomposition of quantities into components or into portions. The method includes other ones well known and approved in the past as more special cases
{"title":"The FBD-Method, A Generally Applicable Tool For Analyzing Power Relations","authors":"M. Depenbrock","doi":"10.1109/ICHPS.1992.559009","DOIUrl":"https://doi.org/10.1109/ICHPS.1992.559009","url":null,"abstract":"A generally applicable method to analyse the relations connecting currents, voltages, instantaneous-, active-, nonactive- and apparent power quantities is described. By introducing a special m-conductor equivalent scheme an unified treatment of nonsinusoidaI, unbalanced polyphase systems is possible and a simple definition of unsymmetrical loads can be derived. It is explained why it is necessary to distinguish between the decomposition of quantities into components or into portions. The method includes other ones well known and approved in the past as more special cases","PeriodicalId":438464,"journal":{"name":"ICHPS V International Conference on Harmonics in Power Systems.","volume":"45 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":"124025775","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.1992.559002
A. Girgis, W. Quaintance, J. Qiu, E. Makram
A time-domain method for impedance modeling of an unbalanced, three-phase power transmission and distribution network using three-phase measurements of bus voltage and injected current waveforms is presented. An impedance model seen at a bus where a harmonic filter is to be installed is calculated for each harmonic frequency, and the effect of placing the filter at the bus is then analyzed at these frequencies. As the configuration or operating condition of the power system varies, the estimated model changes accordingly, provided updated measurements are available. Hence, the effect of the harmonic filter under different system configurations or operating conditions is analyzed, and the information from this analysis is used for online harmonic filter control. Impedance models estimated by the proposed method are applied in filter design and performance analysis with actual recorded data, and the results are presented. >
{"title":"A Time-domain Three-phase Power System Impedance Modeling Approach For Harmonic Filter Analysis","authors":"A. Girgis, W. Quaintance, J. Qiu, E. Makram","doi":"10.1109/ICHPS.1992.559002","DOIUrl":"https://doi.org/10.1109/ICHPS.1992.559002","url":null,"abstract":"A time-domain method for impedance modeling of an unbalanced, three-phase power transmission and distribution network using three-phase measurements of bus voltage and injected current waveforms is presented. An impedance model seen at a bus where a harmonic filter is to be installed is calculated for each harmonic frequency, and the effect of placing the filter at the bus is then analyzed at these frequencies. As the configuration or operating condition of the power system varies, the estimated model changes accordingly, provided updated measurements are available. Hence, the effect of the harmonic filter under different system configurations or operating conditions is analyzed, and the information from this analysis is used for online harmonic filter control. Impedance models estimated by the proposed method are applied in filter design and performance analysis with actual recorded data, and the results are presented. >","PeriodicalId":438464,"journal":{"name":"ICHPS V International Conference on Harmonics in Power Systems.","volume":"37 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":"123287663","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.1992.559006
M. Grotzbach, Jianping Xu
{"title":"Investigation Of Noncharacteristic Harmonics In AC/DC Converters Caused By Network Asymmetries","authors":"M. Grotzbach, Jianping Xu","doi":"10.1109/ICHPS.1992.559006","DOIUrl":"https://doi.org/10.1109/ICHPS.1992.559006","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":"129338249","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 : 1900-01-01DOI: 10.1109/ICHPS.1992.559036
K. Sadek, N. Christl, P. Lutzelberger
The harmonic interaction between AC- and DC-systems has been discussed in various publications with respect to both charactcristic and non-characteristic harmonic phenomenon injected into ac-power transmission systems by HVDC converters. However, in recent convener stations different magnitudes of harmonic currents than the theoretical predicted values have been measured. This paper describes a mathematical circuit analysis to determine the transfer of harmonics from the supplying ac-grid to the receiving ac-system and vice versa connected by HVDC links. In general there are mathematical rules, which type and magnitude of harmonics (dependent on the positive or negative sequence system components) will be transferred through the dc-circuit and injected into the receiving power grid. A mathematical model is represented to describe the transfer of harmonics (harmonic voltage distortion from the sending ac-system) through the HVDC link and its impact on the receiving ac-side. The contribution of these harmonic voltages has been analyzed and will be considered for modelling the harmonic current source for the inverter terminal. The model is valid for power flow in both directions.
{"title":"AC/DC Harmonic Interaction in HVDC Systems","authors":"K. Sadek, N. Christl, P. Lutzelberger","doi":"10.1109/ICHPS.1992.559036","DOIUrl":"https://doi.org/10.1109/ICHPS.1992.559036","url":null,"abstract":"The harmonic interaction between AC- and DC-systems has been discussed in various publications with respect to both charactcristic and non-characteristic harmonic phenomenon injected into ac-power transmission systems by HVDC converters. However, in recent convener stations different magnitudes of harmonic currents than the theoretical predicted values have been measured. This paper describes a mathematical circuit analysis to determine the transfer of harmonics from the supplying ac-grid to the receiving ac-system and vice versa connected by HVDC links. In general there are mathematical rules, which type and magnitude of harmonics (dependent on the positive or negative sequence system components) will be transferred through the dc-circuit and injected into the receiving power grid. A mathematical model is represented to describe the transfer of harmonics (harmonic voltage distortion from the sending ac-system) through the HVDC link and its impact on the receiving ac-side. The contribution of these harmonic voltages has been analyzed and will be considered for modelling the harmonic current source for the inverter terminal. The model is valid for power flow in both directions.","PeriodicalId":438464,"journal":{"name":"ICHPS V International Conference on Harmonics in Power Systems.","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116839214","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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