Pub Date : 2011-10-01DOI: 10.1109/EPQU.2011.6128818
Marián Uher, S. Mišák
For the Smart Grids development is most important knowledge of behaviour of the existing distribution network. For this is used Dynamic Model, which is a software that allows monitoring distribution network behaviour undr varying operating conditions. This softvare is already used by the experts in the field of energy to prepare a regional network switch to a Smart Grid the only built in Czech Republic.
{"title":"Smart region operation optimization using Dynamic Model","authors":"Marián Uher, S. Mišák","doi":"10.1109/EPQU.2011.6128818","DOIUrl":"https://doi.org/10.1109/EPQU.2011.6128818","url":null,"abstract":"For the Smart Grids development is most important knowledge of behaviour of the existing distribution network. For this is used Dynamic Model, which is a software that allows monitoring distribution network behaviour undr varying operating conditions. This softvare is already used by the experts in the field of energy to prepare a regional network switch to a Smart Grid the only built in Czech Republic.","PeriodicalId":369941,"journal":{"name":"11th International Conference on Electrical Power Quality and Utilisation","volume":"759 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123878318","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 : 2011-10-01DOI: 10.1109/EPQU.2011.6128861
V. Monteiro, Henrique Gonçalves, J. Afonso
The large dependency of the imported fossil fuels and the soaring oil prices, makes essential the look for alternatives to the traditional people transportation system. The natural bet is the electric mobility, namely Electric Vehicles (EV), and Plug-in Hybrid Electric Vehicles (PHEV). This way, in this paper is analyzed the potential impacts of the battery charging systems on the grid power quality, in a Smart Grid context. It is considered the current consumed, according to a typical electric consumption profile, and the voltage degradation for a large number of houses. Two different types of EV batteries chargers were considered: a traditional charger; and a smart charger with sinusoidal current consumption and unitary power factor. It presents simulation results of the integration of EVs and PHEVs in terms of power quality, and experimental results of a smart charger which was specially developed for EV charging and that allows mitigation of the power quality degradation.
{"title":"Impact of Electric Vehicles on power quality in a Smart Grid context","authors":"V. Monteiro, Henrique Gonçalves, J. Afonso","doi":"10.1109/EPQU.2011.6128861","DOIUrl":"https://doi.org/10.1109/EPQU.2011.6128861","url":null,"abstract":"The large dependency of the imported fossil fuels and the soaring oil prices, makes essential the look for alternatives to the traditional people transportation system. The natural bet is the electric mobility, namely Electric Vehicles (EV), and Plug-in Hybrid Electric Vehicles (PHEV). This way, in this paper is analyzed the potential impacts of the battery charging systems on the grid power quality, in a Smart Grid context. It is considered the current consumed, according to a typical electric consumption profile, and the voltage degradation for a large number of houses. Two different types of EV batteries chargers were considered: a traditional charger; and a smart charger with sinusoidal current consumption and unitary power factor. It presents simulation results of the integration of EVs and PHEVs in terms of power quality, and experimental results of a smart charger which was specially developed for EV charging and that allows mitigation of the power quality degradation.","PeriodicalId":369941,"journal":{"name":"11th International Conference on Electrical Power Quality and Utilisation","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115803965","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 : 2011-10-01DOI: 10.1109/EPQU.2011.6128916
Miguel Marques, R. Castro, M. Almeida
High wind speeds and wide available area at sea have recently increased the global interest on offshore wind farms. As offshore wind farms become larger and are placed further from the shore, the power transmission to the onshore grid becomes a key feature. The objective of this work is to give further insight to HVAC and HVDC-LCC transmission systems. Several compensation schemes for absorbing the excessive reactive power associated to HVAC are evaluated. Furthermore, the benefits of the STATCOM, namely in what concerns its improved voltage control capabilities, are addressed for both technologies. The results obtained bare some similarities, but also important differences, which are highlighted in the paper.
{"title":"Connection of offshore wind parks: HVAC and HVDC-LCC links with STATCOM","authors":"Miguel Marques, R. Castro, M. Almeida","doi":"10.1109/EPQU.2011.6128916","DOIUrl":"https://doi.org/10.1109/EPQU.2011.6128916","url":null,"abstract":"High wind speeds and wide available area at sea have recently increased the global interest on offshore wind farms. As offshore wind farms become larger and are placed further from the shore, the power transmission to the onshore grid becomes a key feature. The objective of this work is to give further insight to HVAC and HVDC-LCC transmission systems. Several compensation schemes for absorbing the excessive reactive power associated to HVAC are evaluated. Furthermore, the benefits of the STATCOM, namely in what concerns its improved voltage control capabilities, are addressed for both technologies. The results obtained bare some similarities, but also important differences, which are highlighted in the paper.","PeriodicalId":369941,"journal":{"name":"11th International Conference on Electrical Power Quality and Utilisation","volume":"148 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134388527","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 : 2011-10-01DOI: 10.1109/EPQU.2011.6128821
A. Reis, J. C. de Oliveira, R. Apolonio, H. Bronzeado
Transformers are generally energized by closing the circuit breakers at random times. Consequently, this operation generates high transient inrush currents as a result of the asymmetrical magnetic flux produced in the windings. In light of these facts, this paper presents a strategy to control the switching phenomena which occurs during power transformer inrush. The general idea consists of calculating the pre-existing magnetic fluxes left on the core limbs as a function of operating voltage previously applied to the transformer, just prior to the moment in which de-energization has happened. By using these data and the equations to predict the most suitable closing moments, it is shown the proposal effectiveness at accomplishing the main target here pointed out. Experimental investigations are carried out in order to demonstrate the application method and its validation. The results show the feasibility of building hardware and software structures to drastically reduce the transformer inrush currents.
{"title":"A controlled switching methodology for transformer inrush current elimination: Theory and experimental validation","authors":"A. Reis, J. C. de Oliveira, R. Apolonio, H. Bronzeado","doi":"10.1109/EPQU.2011.6128821","DOIUrl":"https://doi.org/10.1109/EPQU.2011.6128821","url":null,"abstract":"Transformers are generally energized by closing the circuit breakers at random times. Consequently, this operation generates high transient inrush currents as a result of the asymmetrical magnetic flux produced in the windings. In light of these facts, this paper presents a strategy to control the switching phenomena which occurs during power transformer inrush. The general idea consists of calculating the pre-existing magnetic fluxes left on the core limbs as a function of operating voltage previously applied to the transformer, just prior to the moment in which de-energization has happened. By using these data and the equations to predict the most suitable closing moments, it is shown the proposal effectiveness at accomplishing the main target here pointed out. Experimental investigations are carried out in order to demonstrate the application method and its validation. The results show the feasibility of building hardware and software structures to drastically reduce the transformer inrush currents.","PeriodicalId":369941,"journal":{"name":"11th International Conference on Electrical Power Quality and Utilisation","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134574428","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 : 2011-10-01DOI: 10.1109/EPQU.2011.6128941
L. Koleva, D. Taskovski, V. Dimcev
In this paper the influence of different wavelet filters on the harmonic analysis of power system waveforms is investigated. For this aim, wavelet packet transform-based algorithm for rms measurement is implemented. Besides commonly used Daubechies filters, Vaidyanathan with 24 coefficients and Coiflets the influence of several Johnston's filters with different characteristics is examined. Experimental tests are performed under different conditions, in case of stationary signals with different harmonics components and in case of non-stationary harmonics distortion. Experimental results show that Johnston's filters outperform the commonly used wavelet filters for harmonic analysis.
{"title":"Measurement of power systems harmonics using QMF filter banks","authors":"L. Koleva, D. Taskovski, V. Dimcev","doi":"10.1109/EPQU.2011.6128941","DOIUrl":"https://doi.org/10.1109/EPQU.2011.6128941","url":null,"abstract":"In this paper the influence of different wavelet filters on the harmonic analysis of power system waveforms is investigated. For this aim, wavelet packet transform-based algorithm for rms measurement is implemented. Besides commonly used Daubechies filters, Vaidyanathan with 24 coefficients and Coiflets the influence of several Johnston's filters with different characteristics is examined. Experimental tests are performed under different conditions, in case of stationary signals with different harmonics components and in case of non-stationary harmonics distortion. Experimental results show that Johnston's filters outperform the commonly used wavelet filters for harmonic analysis.","PeriodicalId":369941,"journal":{"name":"11th International Conference on Electrical Power Quality and Utilisation","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114554386","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 : 2011-10-01DOI: 10.1109/EPQU.2011.6128885
J. Buchta, A. Oziemski
The paper presents results of reliability forecasting for domestic, technologically congener power units rated at 370 MW operating in Belchatow Power Plant and Opole Power Plant as lignite fired and hard coal fired respectively. Estimation of parameters for identified empirical probability distribution functions of operation time and repair time was done by the method of a histogram with a set number of observations in each class. The study includes expected values of reliability indices calculated for main generating installations of both unit types.
{"title":"Estimation of reliability indices of power machinery in 370 MW rated power units operating in polish power system","authors":"J. Buchta, A. Oziemski","doi":"10.1109/EPQU.2011.6128885","DOIUrl":"https://doi.org/10.1109/EPQU.2011.6128885","url":null,"abstract":"The paper presents results of reliability forecasting for domestic, technologically congener power units rated at 370 MW operating in Belchatow Power Plant and Opole Power Plant as lignite fired and hard coal fired respectively. Estimation of parameters for identified empirical probability distribution functions of operation time and repair time was done by the method of a histogram with a set number of observations in each class. The study includes expected values of reliability indices calculated for main generating installations of both unit types.","PeriodicalId":369941,"journal":{"name":"11th International Conference on Electrical Power Quality and Utilisation","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121415247","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 : 2011-10-01DOI: 10.1109/EPQU.2011.6128947
F. P. Santilio, J. Oliveira, T. V. Silva, A. Oliveira
Power quality problems related to short or long time voltage variation requires special equipment such as the well-known dynamic voltage regulators to provide acceptable voltage supply at the point of common coupling (PCC) in accordance with the electrical energy agencies regulations. Focusing at achieving an electromagnetic device that would fulfill the above requirements as far as voltage control is concerned a conception of a voltage compensation unit throughout the insertion of series voltages reinforce with the feeder is presented, modeled, simulated and computational disturbance analysis are carried out aiming at investigation the device performance at sudden voltage variation. This allows highlighting the proposal efficiency at regulating both short and long voltage occurrences. This equipment has been here denominated by Electromagnetic Voltage Compensator (EVC) and it combines an electromagnetic structure with a switching module. The proposed equipment has been implemented in the ATPDraw MODELS platform.
{"title":"An electromagnetic voltage regulator proposal throughout the injection of series compensation: Physical conception and computational analysis","authors":"F. P. Santilio, J. Oliveira, T. V. Silva, A. Oliveira","doi":"10.1109/EPQU.2011.6128947","DOIUrl":"https://doi.org/10.1109/EPQU.2011.6128947","url":null,"abstract":"Power quality problems related to short or long time voltage variation requires special equipment such as the well-known dynamic voltage regulators to provide acceptable voltage supply at the point of common coupling (PCC) in accordance with the electrical energy agencies regulations. Focusing at achieving an electromagnetic device that would fulfill the above requirements as far as voltage control is concerned a conception of a voltage compensation unit throughout the insertion of series voltages reinforce with the feeder is presented, modeled, simulated and computational disturbance analysis are carried out aiming at investigation the device performance at sudden voltage variation. This allows highlighting the proposal efficiency at regulating both short and long voltage occurrences. This equipment has been here denominated by Electromagnetic Voltage Compensator (EVC) and it combines an electromagnetic structure with a switching module. The proposed equipment has been implemented in the ATPDraw MODELS platform.","PeriodicalId":369941,"journal":{"name":"11th International Conference on Electrical Power Quality and Utilisation","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125358213","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 : 2011-10-01DOI: 10.1109/EPQU.2011.6128912
Y. Stauffer, E. Onillon, L. Lisowski, C. Meier, P. Theurillat, B. Roustom, G. Francecscutto, R. Marquis, A. Closset, A. Tóth
With the steadily increase of electrical power demand, the pressure on the power grid as well as electricity power bills keep rising. One way of resolving the first issue consists of building more traditional power generation units (fossil, nuclear, hydroelectric …) and building a stronger grid. However, with the democratization of alternative green energy sources more elegant solutions are now becoming viable. Indeed, in the last decade solar panels have not only become affordable but also more efficient. Tackling the energy problem this way permits to relieve the grid but more importantly can also reduce the electricity bill of the user. But given the fluctuant nature of solar energy a smart planning and usage of such energy sources has to be undertaken. In that context a global energy flux optimization is proposed. The latter aims at optimizing the internal (within the house) and external (to and from the main power grid) energy fluxes in a building that is equipped with: solar panels (and the required hardware for domestic voltage generation), a control station (that performs the optimization process and manages the energy fluxes), a battery (for local energy storage), an electrolyzer system (for the car gas production, compression and storage) and a fuel cell powered car This article is the first step of the total energy chain simulation; the article is divided in two main sections. First the different components are described, from a hardware point of view; their interconnections are also highlighted. Focus is naturally given to the control station, which is the core of the energy flux handling. Second, the chosen energy flux modeling formalism will be presented. In that section the optimization (i.e. cost function and constraints) are also discussed in detail. Finally, the conclusion puts in perspective the evolution of the project from a hardware test bench to a fully equipped house.
{"title":"Energy flux optimization in future buildings","authors":"Y. Stauffer, E. Onillon, L. Lisowski, C. Meier, P. Theurillat, B. Roustom, G. Francecscutto, R. Marquis, A. Closset, A. Tóth","doi":"10.1109/EPQU.2011.6128912","DOIUrl":"https://doi.org/10.1109/EPQU.2011.6128912","url":null,"abstract":"With the steadily increase of electrical power demand, the pressure on the power grid as well as electricity power bills keep rising. One way of resolving the first issue consists of building more traditional power generation units (fossil, nuclear, hydroelectric …) and building a stronger grid. However, with the democratization of alternative green energy sources more elegant solutions are now becoming viable. Indeed, in the last decade solar panels have not only become affordable but also more efficient. Tackling the energy problem this way permits to relieve the grid but more importantly can also reduce the electricity bill of the user. But given the fluctuant nature of solar energy a smart planning and usage of such energy sources has to be undertaken. In that context a global energy flux optimization is proposed. The latter aims at optimizing the internal (within the house) and external (to and from the main power grid) energy fluxes in a building that is equipped with: solar panels (and the required hardware for domestic voltage generation), a control station (that performs the optimization process and manages the energy fluxes), a battery (for local energy storage), an electrolyzer system (for the car gas production, compression and storage) and a fuel cell powered car This article is the first step of the total energy chain simulation; the article is divided in two main sections. First the different components are described, from a hardware point of view; their interconnections are also highlighted. Focus is naturally given to the control station, which is the core of the energy flux handling. Second, the chosen energy flux modeling formalism will be presented. In that section the optimization (i.e. cost function and constraints) are also discussed in detail. Finally, the conclusion puts in perspective the evolution of the project from a hardware test bench to a fully equipped house.","PeriodicalId":369941,"journal":{"name":"11th International Conference on Electrical Power Quality and Utilisation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125377893","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 : 2011-10-01DOI: 10.1109/EPQU.2011.6128913
M. Marzband, A. Sumper, O. Gomis‐Bellmunt, A. Sudriá-Andreu, M. Chindris
The paper aims modeling and simulating a wind turbine and its induction generator (WTIG) system as an electricity source in the power networks. System simulation has been done using the facilities offered by MATLAB/SIMULINK software. At first, equivalent models of various parts of a wind turbine generation system (WTGS) with fixed speed wind turbine (FSWT) are presented, and then an equivalent model of a wind turbine that operates in a grid connected mode is achieved by integrating these sub-models. The proposed equivalent models provide high accuracy for representing the dynamic response of wind power generation systems (WPGS) and can be used for power system simulations. Likewise, the analysis of the reactive power management of a WTGS consisting of FSWTs is carried out by using a static synchronous compensator (STATCOM). Regarding this matter, the rating calculation of the compensator for a FSWT is performed, and the effect of the network strength on the compensator rating is studied. Furthermore, the compatibility of FSWT with the mathematical models is evaluated by using simulation in MATLAB/SIMULINK environment.
{"title":"Modeling and simulation of the fixed speed wind power generation system for grid studies","authors":"M. Marzband, A. Sumper, O. Gomis‐Bellmunt, A. Sudriá-Andreu, M. Chindris","doi":"10.1109/EPQU.2011.6128913","DOIUrl":"https://doi.org/10.1109/EPQU.2011.6128913","url":null,"abstract":"The paper aims modeling and simulating a wind turbine and its induction generator (WTIG) system as an electricity source in the power networks. System simulation has been done using the facilities offered by MATLAB/SIMULINK software. At first, equivalent models of various parts of a wind turbine generation system (WTGS) with fixed speed wind turbine (FSWT) are presented, and then an equivalent model of a wind turbine that operates in a grid connected mode is achieved by integrating these sub-models. The proposed equivalent models provide high accuracy for representing the dynamic response of wind power generation systems (WPGS) and can be used for power system simulations. Likewise, the analysis of the reactive power management of a WTGS consisting of FSWTs is carried out by using a static synchronous compensator (STATCOM). Regarding this matter, the rating calculation of the compensator for a FSWT is performed, and the effect of the network strength on the compensator rating is studied. Furthermore, the compatibility of FSWT with the mathematical models is evaluated by using simulation in MATLAB/SIMULINK environment.","PeriodicalId":369941,"journal":{"name":"11th International Conference on Electrical Power Quality and Utilisation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129290157","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 : 2011-10-01DOI: 10.1109/EPQU.2011.6128961
Carlos Patrão, J. Delgado, A. D. de Almeida, Paula Fonseca
This paper presents the main results of a survey conducted in Portugal to evaluate the costs associated with Power Quality disturbances in Industry (more specifically of four typical and most common voltage interruptions). The survey was conducted in different companies from different industrial sectors. Although Power Quality Costs estimation was the main issue of the survey, several other issues were analyzed in order to evaluate important matters such as customer satisfaction. From the analysis of the collected data, the vast majority of companies are satisfied with the Quality of Service provided by the utility, but they indicated the "utility" and "weather conditions" as the main responsible for power supply disturbances. It is clear that the Power Quality disturbances cause high costs to the companies in all the sectors analyzed. This study allowed to get a good picture and to quantify the Portuguese Power Quality Costs related with electrical power supply disturbances.
{"title":"Power Quality Costs estimation in Portuguese industry","authors":"Carlos Patrão, J. Delgado, A. D. de Almeida, Paula Fonseca","doi":"10.1109/EPQU.2011.6128961","DOIUrl":"https://doi.org/10.1109/EPQU.2011.6128961","url":null,"abstract":"This paper presents the main results of a survey conducted in Portugal to evaluate the costs associated with Power Quality disturbances in Industry (more specifically of four typical and most common voltage interruptions). The survey was conducted in different companies from different industrial sectors. Although Power Quality Costs estimation was the main issue of the survey, several other issues were analyzed in order to evaluate important matters such as customer satisfaction. From the analysis of the collected data, the vast majority of companies are satisfied with the Quality of Service provided by the utility, but they indicated the \"utility\" and \"weather conditions\" as the main responsible for power supply disturbances. It is clear that the Power Quality disturbances cause high costs to the companies in all the sectors analyzed. This study allowed to get a good picture and to quantify the Portuguese Power Quality Costs related with electrical power supply disturbances.","PeriodicalId":369941,"journal":{"name":"11th International Conference on Electrical Power Quality and Utilisation","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131494768","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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