Pub Date : 2010-11-09DOI: 10.1109/ICHQP.2010.5625313
G. P. Colnago, J. Vieira, G. Sousa, J. R. Macedo
This work is about a developed and implemented power quality digital meter to comply with the new Brazilian standard to regulate the Power Quality in Brazil. The objective of this work has been to develop a low cost device able to monitor the main indices of standard such as the steady state rms voltage, harmonic distortion, fluctuation voltage, unbalance voltage, voltage sags and swells and power supply interruptions in real-time. Through a cellular module the device meter is remotely controlled and configured. This way, it can send periodically measurements and information data to a remote server. Other discussed point has been the power quality indices of the standard.
{"title":"Real time power quality monitoring system according to new Brazilian regulation policies","authors":"G. P. Colnago, J. Vieira, G. Sousa, J. R. Macedo","doi":"10.1109/ICHQP.2010.5625313","DOIUrl":"https://doi.org/10.1109/ICHQP.2010.5625313","url":null,"abstract":"This work is about a developed and implemented power quality digital meter to comply with the new Brazilian standard to regulate the Power Quality in Brazil. The objective of this work has been to develop a low cost device able to monitor the main indices of standard such as the steady state rms voltage, harmonic distortion, fluctuation voltage, unbalance voltage, voltage sags and swells and power supply interruptions in real-time. Through a cellular module the device meter is remotely controlled and configured. This way, it can send periodically measurements and information data to a remote server. Other discussed point has been the power quality indices of the standard.","PeriodicalId":180078,"journal":{"name":"Proceedings of 14th International Conference on Harmonics and Quality of Power - ICHQP 2010","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125983769","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 : 2010-11-09DOI: 10.1109/ICHQP.2010.5625441
J. C. Escamilla, P. Moreno, J. L. Naredo
In this paper, a new method for modeling transmission lines with frequency dependent electrical parameters for time domain transient studies is presented. The model is based on the Method of the Characteristics. The frequency dependence is included by means of a rational approximation of the transient resistance. The results are compared to those from a frequency domain method and from the ATP/EMTP.
{"title":"A new model of multiconductor transmission lines for time domain transient analysis","authors":"J. C. Escamilla, P. Moreno, J. L. Naredo","doi":"10.1109/ICHQP.2010.5625441","DOIUrl":"https://doi.org/10.1109/ICHQP.2010.5625441","url":null,"abstract":"In this paper, a new method for modeling transmission lines with frequency dependent electrical parameters for time domain transient studies is presented. The model is based on the Method of the Characteristics. The frequency dependence is included by means of a rational approximation of the transient resistance. The results are compared to those from a frequency domain method and from the ATP/EMTP.","PeriodicalId":180078,"journal":{"name":"Proceedings of 14th International Conference on Harmonics and Quality of Power - ICHQP 2010","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132252955","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 : 2010-11-09DOI: 10.1109/ICHQP.2010.5625493
A. Pavas, H. Torres-Sanchez, V. Staudt
A new method to decompose currents in electrical circuits in order to analyze stationary power quality disturbances is presented in this paper. A set of reference conditions allows the definition of the desirable load behavior regarding power quality. The decomposition permits to analyze separately three stationary phenomena, waveform distortion, asymmetry and phase displacement. A discussion about the problem is responsibilities is presented as well.
{"title":"Method of Disturbances Interaction: Novel approach to assess responsibilities for steady state power quality disturbances among customers","authors":"A. Pavas, H. Torres-Sanchez, V. Staudt","doi":"10.1109/ICHQP.2010.5625493","DOIUrl":"https://doi.org/10.1109/ICHQP.2010.5625493","url":null,"abstract":"A new method to decompose currents in electrical circuits in order to analyze stationary power quality disturbances is presented in this paper. A set of reference conditions allows the definition of the desirable load behavior regarding power quality. The decomposition permits to analyze separately three stationary phenomena, waveform distortion, asymmetry and phase displacement. A discussion about the problem is responsibilities is presented as well.","PeriodicalId":180078,"journal":{"name":"Proceedings of 14th International Conference on Harmonics and Quality of Power - ICHQP 2010","volume":"73 33","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134196622","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 : 2010-11-09DOI: 10.1109/ICHQP.2010.5625421
R. Barr, V. Gosbell
“Voltage Droop” is a new concept that has been developed primarily for use in the harmonic current allocation process. Voltage droop offers the opportunity to both vastly simplify the procedures required by the present IEC 61000.3.6 [1] guidelines for Stage 2 allocation and provide a solid theoretical base to this work. The voltage droop concept has also been found to provide a usefull theoretical basis for the harmonic standard IEEE 519[2]. While this paper develops the voltage droop concept using diagrams and words, the companion paper “Harmonic Allocation Following IEC Guidelines Using the Voltage Droop Concept”[3] contains a full critical mathematical description including an example. The voltage droop concept can be applied to radial, meshed and SWER distribution systems where feeders are sufficiently short that line capacitance can be ignored and all capacitor banks are detuned to prevent resonances at harmonic frequencies. The concept has application in HV, MV and LV systems. Use of the voltage droop concept for flicker allocation and unbalance studies is also briefly discussed.
{"title":"Introducing power system voltage droop as a new concept for harmonic current allocation","authors":"R. Barr, V. Gosbell","doi":"10.1109/ICHQP.2010.5625421","DOIUrl":"https://doi.org/10.1109/ICHQP.2010.5625421","url":null,"abstract":"“Voltage Droop” is a new concept that has been developed primarily for use in the harmonic current allocation process. Voltage droop offers the opportunity to both vastly simplify the procedures required by the present IEC 61000.3.6 [1] guidelines for Stage 2 allocation and provide a solid theoretical base to this work. The voltage droop concept has also been found to provide a usefull theoretical basis for the harmonic standard IEEE 519[2]. While this paper develops the voltage droop concept using diagrams and words, the companion paper “Harmonic Allocation Following IEC Guidelines Using the Voltage Droop Concept”[3] contains a full critical mathematical description including an example. The voltage droop concept can be applied to radial, meshed and SWER distribution systems where feeders are sufficiently short that line capacitance can be ignored and all capacitor banks are detuned to prevent resonances at harmonic frequencies. The concept has application in HV, MV and LV systems. Use of the voltage droop concept for flicker allocation and unbalance studies is also briefly discussed.","PeriodicalId":180078,"journal":{"name":"Proceedings of 14th International Conference on Harmonics and Quality of Power - ICHQP 2010","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134207714","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 : 2010-11-09DOI: 10.1109/ICHQP.2010.5625361
J. Sanguinetti, Y. Baghzouz
This article evaluates the method of reducing power loss due to 3rd harmonic currents in a building that contains a significant level of electronic loads, by placing a passive filter in the neutral path. The initial power loss is obtained through current measurements in the phase and neutral conductors and knowledge of the resistance of these conductors and that of the transformer serving the facility. PSpice simulations are performed to determine the most suitable RL-C filter to minimize this loss. The losses are found to be not that significant due to existing reinforcements in the distribution circuit. The effect of filter placement on voltage distortion and capacitor resonance with the transformer leakage inductance are addressed.
{"title":"Evaluation of harmonic current reduction for the purpose of energy savings — A case study","authors":"J. Sanguinetti, Y. Baghzouz","doi":"10.1109/ICHQP.2010.5625361","DOIUrl":"https://doi.org/10.1109/ICHQP.2010.5625361","url":null,"abstract":"This article evaluates the method of reducing power loss due to 3rd harmonic currents in a building that contains a significant level of electronic loads, by placing a passive filter in the neutral path. The initial power loss is obtained through current measurements in the phase and neutral conductors and knowledge of the resistance of these conductors and that of the transformer serving the facility. PSpice simulations are performed to determine the most suitable RL-C filter to minimize this loss. The losses are found to be not that significant due to existing reinforcements in the distribution circuit. The effect of filter placement on voltage distortion and capacitor resonance with the transformer leakage inductance are addressed.","PeriodicalId":180078,"journal":{"name":"Proceedings of 14th International Conference on Harmonics and Quality of Power - ICHQP 2010","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134177704","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 : 2010-11-09DOI: 10.1109/ICHQP.2010.5625465
A. Lazkano, I. Azkarate, J. Gutiérrez, J. Ruiz, L. Leturiondo, P. Sáiz
Power injection of grid-connected wind turbines can produce voltage fluctuations and hence affect power quality. The assessment of the injected flicker is computed through the calculation of a fictitious voltage in a simple grid-model. For that purpose, the instantaneous angle of the fundamental component of the measured voltage has to be estimated. This paper presents the analysis of two different approaches for the estimation of the instantaneous frequency and phase of the fundamental frequency of a voltage signal. Based on those two approaches, four estimation methods are assessed. The accuracy of each method is evaluated using analytically generated signal. Then, the methods are compared when applied to registered voltage signals, collected in a Spanish wind farm.
{"title":"Measurement of the flicker characteristics of grid connected wind turbines: Instantaneous frequency versus instantaneous phase estimation methods","authors":"A. Lazkano, I. Azkarate, J. Gutiérrez, J. Ruiz, L. Leturiondo, P. Sáiz","doi":"10.1109/ICHQP.2010.5625465","DOIUrl":"https://doi.org/10.1109/ICHQP.2010.5625465","url":null,"abstract":"Power injection of grid-connected wind turbines can produce voltage fluctuations and hence affect power quality. The assessment of the injected flicker is computed through the calculation of a fictitious voltage in a simple grid-model. For that purpose, the instantaneous angle of the fundamental component of the measured voltage has to be estimated. This paper presents the analysis of two different approaches for the estimation of the instantaneous frequency and phase of the fundamental frequency of a voltage signal. Based on those two approaches, four estimation methods are assessed. The accuracy of each method is evaluated using analytically generated signal. Then, the methods are compared when applied to registered voltage signals, collected in a Spanish wind farm.","PeriodicalId":180078,"journal":{"name":"Proceedings of 14th International Conference on Harmonics and Quality of Power - ICHQP 2010","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131599399","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 : 2010-11-09DOI: 10.1109/ICHQP.2010.5625395
E. Larsson, M. Bollen
This paper present measurements performed in the lab where experimental setup of 48 fluorescent lamps powered by high-frequency ballasts. The frequency range of interest is above the traditional harmonic range from 2 kHz up to 150 kHz. In this frequency range the measurements distinguish between two distortions found; recurrent oscillations and remains from the switching at the active power factor correction circuit.
{"title":"Measurement result from 1 to 48 fluorescent lamps in the frequency range 2 to 150 kHz","authors":"E. Larsson, M. Bollen","doi":"10.1109/ICHQP.2010.5625395","DOIUrl":"https://doi.org/10.1109/ICHQP.2010.5625395","url":null,"abstract":"This paper present measurements performed in the lab where experimental setup of 48 fluorescent lamps powered by high-frequency ballasts. The frequency range of interest is above the traditional harmonic range from 2 kHz up to 150 kHz. In this frequency range the measurements distinguish between two distortions found; recurrent oscillations and remains from the switching at the active power factor correction circuit.","PeriodicalId":180078,"journal":{"name":"Proceedings of 14th International Conference on Harmonics and Quality of Power - ICHQP 2010","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117335669","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 : 2010-11-09DOI: 10.1109/ICHQP.2010.5625334
R. Chiumeo, C. Gandolfi
The basic concept of a Premium Power Park (PPP) is to ensure better power supply quality level than the standard one offered by the distribution system and also diversified levels depending on customers' needs, thanks to the use of different kind of Custom Power devices (CUSPO). The CUSPO are power electronics devices that are able to compensate voltage dips on critical loads dynamically and voltage variations due to disturbing loads. The efficiency of these devices depends on the efficiency of the control technique implemented in the inverter. The paper deals with the simulations of a possible configuration of Premium Power Park (PPP), studied by ERSE in the frame of the Research Fund for the Italian Electrical System, focusing on a D-STATCOM control system and operating condition in the studied PPP.
{"title":"D-STATCOM control system and operation in a configuration of Premium Power Park","authors":"R. Chiumeo, C. Gandolfi","doi":"10.1109/ICHQP.2010.5625334","DOIUrl":"https://doi.org/10.1109/ICHQP.2010.5625334","url":null,"abstract":"The basic concept of a Premium Power Park (PPP) is to ensure better power supply quality level than the standard one offered by the distribution system and also diversified levels depending on customers' needs, thanks to the use of different kind of Custom Power devices (CUSPO). The CUSPO are power electronics devices that are able to compensate voltage dips on critical loads dynamically and voltage variations due to disturbing loads. The efficiency of these devices depends on the efficiency of the control technique implemented in the inverter. The paper deals with the simulations of a possible configuration of Premium Power Park (PPP), studied by ERSE in the frame of the Research Fund for the Italian Electrical System, focusing on a D-STATCOM control system and operating condition in the studied PPP.","PeriodicalId":180078,"journal":{"name":"Proceedings of 14th International Conference on Harmonics and Quality of Power - ICHQP 2010","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131857577","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 : 2010-11-09DOI: 10.1109/ICHQP.2010.5625333
N. Gibo, K. Yukihira, K. Deno, Y. Nagasaka
Flicker is generally caused by electric arc furnaces. The measure equipment such as SVC etc. is generally used to suppress flicker below the restriction value in power system. If flicker control performance can be improved by new control scheme, flicker is suppressed. However, the capacity increases by compensating for all the frequency components. This paper shows proposed control scheme of a line-commutated SVC for flicker control with SVC capacity reduction. The excellent control performance is achieved by applying the control of a feed-forward (FF) and a feedback (FB) schemes at the same time. In addition, proposed control has efficient extraction method of flicker component by design of parallel band-pass filters for capacity reduction. The design gives priority to specific frequency region with high restrain effect in flicker components. The evaluation of control performance and reduction effect of SVC capacity is verified by numerical simulation.
{"title":"Reduction of SVC capacity by flicker control using parallel band-pass filters","authors":"N. Gibo, K. Yukihira, K. Deno, Y. Nagasaka","doi":"10.1109/ICHQP.2010.5625333","DOIUrl":"https://doi.org/10.1109/ICHQP.2010.5625333","url":null,"abstract":"Flicker is generally caused by electric arc furnaces. The measure equipment such as SVC etc. is generally used to suppress flicker below the restriction value in power system. If flicker control performance can be improved by new control scheme, flicker is suppressed. However, the capacity increases by compensating for all the frequency components. This paper shows proposed control scheme of a line-commutated SVC for flicker control with SVC capacity reduction. The excellent control performance is achieved by applying the control of a feed-forward (FF) and a feedback (FB) schemes at the same time. In addition, proposed control has efficient extraction method of flicker component by design of parallel band-pass filters for capacity reduction. The design gives priority to specific frequency region with high restrain effect in flicker components. The evaluation of control performance and reduction effect of SVC capacity is verified by numerical simulation.","PeriodicalId":180078,"journal":{"name":"Proceedings of 14th International Conference on Harmonics and Quality of Power - ICHQP 2010","volume":"29 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131907699","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 : 2010-11-09DOI: 10.1109/ICHQP.2010.5625343
A. Eltamaly, A. Alolah
The line currents of three-phase diode bridge rectifier suffer from high THD. This THD is higher than IEEE standards. Injection of six harmonic components to the control signal of the boost converter connected to the three-phase diode bridge rectifier reduces the THD of the utility line current. In this paper a digital implementation of injecting six harmonic to the control signal of three-phase boost rectifier is shown. The digital implementation is carried out by using FPGA. In this study a sin-wave and a triangle-wave with six times the fundamental frequency and variable amplitude are digitally generated in the FPGA. Each signal is added to the dc control signal component of boost converter to be compared with digitally generated saw-tooth. The simulation and experimental results show that the THD of the utility line currents depends on the amplitude and phase-shift of the six-order component injected to the control signal of the boost converter and the angle of input three-phase voltage.
{"title":"Digital implementation of harmonics reduction of three-phase boost rectifier","authors":"A. Eltamaly, A. Alolah","doi":"10.1109/ICHQP.2010.5625343","DOIUrl":"https://doi.org/10.1109/ICHQP.2010.5625343","url":null,"abstract":"The line currents of three-phase diode bridge rectifier suffer from high THD. This THD is higher than IEEE standards. Injection of six harmonic components to the control signal of the boost converter connected to the three-phase diode bridge rectifier reduces the THD of the utility line current. In this paper a digital implementation of injecting six harmonic to the control signal of three-phase boost rectifier is shown. The digital implementation is carried out by using FPGA. In this study a sin-wave and a triangle-wave with six times the fundamental frequency and variable amplitude are digitally generated in the FPGA. Each signal is added to the dc control signal component of boost converter to be compared with digitally generated saw-tooth. The simulation and experimental results show that the THD of the utility line currents depends on the amplitude and phase-shift of the six-order component injected to the control signal of the boost converter and the angle of input three-phase voltage.","PeriodicalId":180078,"journal":{"name":"Proceedings of 14th International Conference on Harmonics and Quality of Power - ICHQP 2010","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124298814","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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