Pub Date : 2010-11-09DOI: 10.1109/ICHQP.2010.5625450
T. Vandoorn, T. Loix, L. Vandevelde, B. Meersman, J. Driesen
The emergence of large amounts of distributed energy resources (DER) poses new challenges for the active participation of those units in the control of the grid. In this context, a recent development is the microgrid, which presents a coordinated approach for integrating the DER in the electrical grid. Microgrids are able to operate either connected to the distribution grid or in islanded mode. In this paper, the influence of different power control strategies of DER is studied with respect to the voltage profile in an islanded microgrid. A description of the control strategies is presented, as well as some simulation results for a basic microgrid.
{"title":"Influence of power control strategies on the voltage profile in an islanded microgrid","authors":"T. Vandoorn, T. Loix, L. Vandevelde, B. Meersman, J. Driesen","doi":"10.1109/ICHQP.2010.5625450","DOIUrl":"https://doi.org/10.1109/ICHQP.2010.5625450","url":null,"abstract":"The emergence of large amounts of distributed energy resources (DER) poses new challenges for the active participation of those units in the control of the grid. In this context, a recent development is the microgrid, which presents a coordinated approach for integrating the DER in the electrical grid. Microgrids are able to operate either connected to the distribution grid or in islanded mode. In this paper, the influence of different power control strategies of DER is studied with respect to the voltage profile in an islanded microgrid. A description of the control strategies is presented, as well as some simulation results for a basic microgrid.","PeriodicalId":180078,"journal":{"name":"Proceedings of 14th International Conference on Harmonics and Quality of Power - ICHQP 2010","volume":"13 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":"124910304","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.2010.5625478
H. Arango, J. D. de Abreu, B. Bonatto, C. M. Vieira Tahan, N. Kagan, M. R. Gouvêa
This paper deals with the modeling of electric markets whenever certain imperfections pollute the supplied electrical energy. These imperfections are described in terms of a lack in power quality, and must be quantitatively introduced in the model as an additional economic factor which influences the consumption of electrical energy and its market price. Therefore, the main intent of this paper is to provide a unifying perspective in regard of the following question: How much the economic performance of electricity markets is downgraded by imperfections of supply? Such a problem can only be resolved with the aid of a market model, which should be able to integrate both technological and financial features in a single analytical frame. This is precisely the type of market model which is developed in the paper: a one including imperfections along with the other sources of cost. While very simple, the market model may be used in various important studies, such as the x-factor for productivity gains, quality target calculation, disturbances mitigation by demand-side management, etc‥ An application to compute continuity standards will be developed as an example of the model usage and potentiality.
{"title":"The influence of quality on the creation of economic value in electricity markets","authors":"H. Arango, J. D. de Abreu, B. Bonatto, C. M. Vieira Tahan, N. Kagan, M. R. Gouvêa","doi":"10.1109/ICHQP.2010.5625478","DOIUrl":"https://doi.org/10.1109/ICHQP.2010.5625478","url":null,"abstract":"This paper deals with the modeling of electric markets whenever certain imperfections pollute the supplied electrical energy. These imperfections are described in terms of a lack in power quality, and must be quantitatively introduced in the model as an additional economic factor which influences the consumption of electrical energy and its market price. Therefore, the main intent of this paper is to provide a unifying perspective in regard of the following question: How much the economic performance of electricity markets is downgraded by imperfections of supply? Such a problem can only be resolved with the aid of a market model, which should be able to integrate both technological and financial features in a single analytical frame. This is precisely the type of market model which is developed in the paper: a one including imperfections along with the other sources of cost. While very simple, the market model may be used in various important studies, such as the x-factor for productivity gains, quality target calculation, disturbances mitigation by demand-side management, etc‥ An application to compute continuity standards will be developed as an example of the model usage and potentiality.","PeriodicalId":180078,"journal":{"name":"Proceedings of 14th International Conference on Harmonics and Quality of Power - ICHQP 2010","volume":"10 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":"127247200","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.2010.5625442
M. Delfanti, M. Merlo, G. Monfredini, V. Olivieri, M. Pozzi, A. Silvestri
This paper describes the possible evolution of Italian distribution system in facing the growing penetration of Dispersed Generation (DG), in the perspective of smart grids. As for the Italian system, after discussing the Hosting Capacity of MV distribution networks, it is recognized that some challenges are to be faced due to the increasing amount of DG. Even though current technology provides satisfactory solutions to manage this new situation, loss-of-mains protection (LOM) is one of the most critical issues to be faced, at least for the Italian system. Only an intelligent use of Information and Communication Technology (ICT) will overcome the current limitations and make possible a larger DG penetration without hindering system security. Milano Wi-Power is a project undertaken by Politecnico di Milano dealing with the critical aspects of the communication systems applied to distribution networks. The specific goal is to test and validate, both through simulations and field trials, possible communication systems able to connect primary substations with DG units along the network.
{"title":"Hosting Dispersed Generation on Italian MV networks: Towards smart grids","authors":"M. Delfanti, M. Merlo, G. Monfredini, V. Olivieri, M. Pozzi, A. Silvestri","doi":"10.1109/ICHQP.2010.5625442","DOIUrl":"https://doi.org/10.1109/ICHQP.2010.5625442","url":null,"abstract":"This paper describes the possible evolution of Italian distribution system in facing the growing penetration of Dispersed Generation (DG), in the perspective of smart grids. As for the Italian system, after discussing the Hosting Capacity of MV distribution networks, it is recognized that some challenges are to be faced due to the increasing amount of DG. Even though current technology provides satisfactory solutions to manage this new situation, loss-of-mains protection (LOM) is one of the most critical issues to be faced, at least for the Italian system. Only an intelligent use of Information and Communication Technology (ICT) will overcome the current limitations and make possible a larger DG penetration without hindering system security. Milano Wi-Power is a project undertaken by Politecnico di Milano dealing with the critical aspects of the communication systems applied to distribution networks. The specific goal is to test and validate, both through simulations and field trials, possible communication systems able to connect primary substations with DG units along the network.","PeriodicalId":180078,"journal":{"name":"Proceedings of 14th International Conference on Harmonics and Quality of Power - ICHQP 2010","volume":"5 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":"128056565","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.2010.5625506
N. Browne, T. J. Browne, S. Elphick
Power system monitoring capabilities and requirements are evolving rapidly. The traditional monitoring framework in Australian distribution networks involves biannual readings of maximum demand at each distribution substation. As utilities respond to developments in metering and communications technology, automated collection and retrieval of quasi-real-time system data between substations and central repositories is now feasible. This gives network managers a significantly increased understanding of distribution network dynamic activity such as daily and seasonal load profiles. This leads to the increased ability of utilities to exploit metering data for power quality analysis purposes. This paper examines the scope for, and challenges associated with, integration of power quality monitoring with advanced metering. Emphasis is directed towards technical and regulatory conditions applying to Australian distribution utilities. Particular consideration is given to the different characteristics of the various types of sites where monitoring is required.
{"title":"Monitoring intelligent distribution power systems — A power quality plan","authors":"N. Browne, T. J. Browne, S. Elphick","doi":"10.1109/ICHQP.2010.5625506","DOIUrl":"https://doi.org/10.1109/ICHQP.2010.5625506","url":null,"abstract":"Power system monitoring capabilities and requirements are evolving rapidly. The traditional monitoring framework in Australian distribution networks involves biannual readings of maximum demand at each distribution substation. As utilities respond to developments in metering and communications technology, automated collection and retrieval of quasi-real-time system data between substations and central repositories is now feasible. This gives network managers a significantly increased understanding of distribution network dynamic activity such as daily and seasonal load profiles. This leads to the increased ability of utilities to exploit metering data for power quality analysis purposes. This paper examines the scope for, and challenges associated with, integration of power quality monitoring with advanced metering. Emphasis is directed towards technical and regulatory conditions applying to Australian distribution utilities. Particular consideration is given to the different characteristics of the various types of sites where monitoring is required.","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":"129570042","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.2010.5625449
D. Falabretti, M. Delfanti, M. Merlo, J. Zaldívar, F. Strozzi
In the present study divergence operator is exploited with the aim to improve the frequency regulation in a distribution network weakly connected to the transmission grid. A novel regulator has been investigated to drive a storage device with the target to improve the system dynamic behavior. The proposed approach has been implemented in a dedicated dynamic simulation tool. The performance of the divergence based regulator has been evaluated with respect to the respond of a classical frequency regulator (based on local measure).
{"title":"Divergence operator for the stability assessment of a microgrid weakly connected to the power system","authors":"D. Falabretti, M. Delfanti, M. Merlo, J. Zaldívar, F. Strozzi","doi":"10.1109/ICHQP.2010.5625449","DOIUrl":"https://doi.org/10.1109/ICHQP.2010.5625449","url":null,"abstract":"In the present study divergence operator is exploited with the aim to improve the frequency regulation in a distribution network weakly connected to the transmission grid. A novel regulator has been investigated to drive a storage device with the target to improve the system dynamic behavior. The proposed approach has been implemented in a dedicated dynamic simulation tool. The performance of the divergence based regulator has been evaluated with respect to the respond of a classical frequency regulator (based on local measure).","PeriodicalId":180078,"journal":{"name":"Proceedings of 14th International Conference on Harmonics and Quality of Power - ICHQP 2010","volume":"106 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":"117225570","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.2010.5625344
A. Dán, D. Raisz
The first part of this paper contains a short review on problems related to distribution system operators' (DSOs) current practice regarding earth fault location and sustained faulty operation of compensated networks. A new device and method are then presented that have been implemented recently at Hungarian DSOs. This technique uses current injection parallel to the Petersen coil for fault location, and the same device is further used to decrease the harmonics in the residual fault current during sustained earth-fault operation. First field test results are presented. It is also shown that the CTs installed along with the proposed device1eliminate the need for the additional resistor that was necessary to select the faulted feeder.
{"title":"Towards a more reliable operation of compensated networks in case of single phase to ground faults","authors":"A. Dán, D. Raisz","doi":"10.1109/ICHQP.2010.5625344","DOIUrl":"https://doi.org/10.1109/ICHQP.2010.5625344","url":null,"abstract":"The first part of this paper contains a short review on problems related to distribution system operators' (DSOs) current practice regarding earth fault location and sustained faulty operation of compensated networks. A new device and method are then presented that have been implemented recently at Hungarian DSOs. This technique uses current injection parallel to the Petersen coil for fault location, and the same device is further used to decrease the harmonics in the residual fault current during sustained earth-fault operation. First field test results are presented. It is also shown that the CTs installed along with the proposed device1eliminate the need for the additional resistor that was necessary to select the faulted feeder.","PeriodicalId":180078,"journal":{"name":"Proceedings of 14th International Conference on Harmonics and Quality of Power - ICHQP 2010","volume":"215 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":"121108578","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.2010.5625325
B. Howe
This paper presents the need for improved PQ benchmarking in advance of the changes portended by the so-called Smart Grid as well as from new and changing loads. It also presents a summary of the key phenomena to be studied and a basic approach for summarizing these phenomena.
{"title":"PQ Benchmarking in the Age of the Smart Grid","authors":"B. Howe","doi":"10.1109/ICHQP.2010.5625325","DOIUrl":"https://doi.org/10.1109/ICHQP.2010.5625325","url":null,"abstract":"This paper presents the need for improved PQ benchmarking in advance of the changes portended by the so-called Smart Grid as well as from new and changing loads. It also presents a summary of the key phenomena to be studied and a basic approach for summarizing these phenomena.","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":"121305569","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.2010.5625504
O. Quiroga, J. Meléndez, S. Herraiz
A pattern discovery approach applied to sequences of voltage sags is proposed for fault modeling and failure prediction. It is assumed the existence of some failures that are the result of accumulated stress produced by overcurrents during previous faults or the existence of pattern sequences produced by the reclosing of the protection system in presence of a fault. So there may exist relationships between events. Events registered in a real power distribution system are analyzed to search those fault patterns. The events considered in this study are voltage sags generated by homopolar faults and registered by power quality monitors installed in the secondary of transformers in distribution substations. The ordered list (according to their time of ocurrence) of events corresponds to a sequence, and magnitude and duration are the attributes considered to describe the events. The aim of this work is to find patterns in a sequence of voltage sags that allow to recognize relationships between different types of sags occurred along time.
{"title":"Fault-pattern discovery in sequences of voltage sag events","authors":"O. Quiroga, J. Meléndez, S. Herraiz","doi":"10.1109/ICHQP.2010.5625504","DOIUrl":"https://doi.org/10.1109/ICHQP.2010.5625504","url":null,"abstract":"A pattern discovery approach applied to sequences of voltage sags is proposed for fault modeling and failure prediction. It is assumed the existence of some failures that are the result of accumulated stress produced by overcurrents during previous faults or the existence of pattern sequences produced by the reclosing of the protection system in presence of a fault. So there may exist relationships between events. Events registered in a real power distribution system are analyzed to search those fault patterns. The events considered in this study are voltage sags generated by homopolar faults and registered by power quality monitors installed in the secondary of transformers in distribution substations. The ordered list (according to their time of ocurrence) of events corresponds to a sequence, and magnitude and duration are the attributes considered to describe the events. The aim of this work is to find patterns in a sequence of voltage sags that allow to recognize relationships between different types of sags occurred along time.","PeriodicalId":180078,"journal":{"name":"Proceedings of 14th International Conference on Harmonics and Quality of Power - ICHQP 2010","volume":"299 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":"115947333","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.2010.5625433
M. de Nigris, I. Gianinoni, S. Grillo, S. Massucco, F. Silvestro
Evaluating the possible impact on electric distribution networks of a large number of plug-in electric vehicles (PEV) is becoming of great interest. In fact, during battery charging, PEVs are a widely spread load of significant magnitude and somewhat unpredictable. On the contrary PEV batteries may constitute a significant reserve and may be used to provide storage capability for cheap energy produced by renewable sources and to supply auxiliary services to the grid.
{"title":"Impact evaluation of plug-in electric vehicles (PEV) on electric distribution networks","authors":"M. de Nigris, I. Gianinoni, S. Grillo, S. Massucco, F. Silvestro","doi":"10.1109/ICHQP.2010.5625433","DOIUrl":"https://doi.org/10.1109/ICHQP.2010.5625433","url":null,"abstract":"Evaluating the possible impact on electric distribution networks of a large number of plug-in electric vehicles (PEV) is becoming of great interest. In fact, during battery charging, PEVs are a widely spread load of significant magnitude and somewhat unpredictable. On the contrary PEV batteries may constitute a significant reserve and may be used to provide storage capability for cheap energy produced by renewable sources and to supply auxiliary services to the grid.","PeriodicalId":180078,"journal":{"name":"Proceedings of 14th International Conference on Harmonics and Quality of Power - ICHQP 2010","volume":"290 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":"132603577","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.2010.5625389
A. Baloi, A. Pana, N. Chiosa
The paper presents an efficient mathematical model to anticipate the effects of a transversal impedance installation in a bus of an electrical distribution network harmonic polluted, depending on the harmonic impedance seen in the respective section. There are two aspects of these effects: the amplification of the harmonic conditions in the bus, and the increase of the current on the respective impedance. A useful application of the mathematical model is the power factor correction by capacitive compensation, more, the LC resonance is possible. That's why the paper propose an algorithm to connect the capacitor banks in the buses of an electrical network or to install harmonic filters if is necessary. The algorithm is applied in a MatLab simulation for a 10 buses network.
{"title":"Optimal choosing and placing of reactive power sources in an electrical distribution network harmonically polluted","authors":"A. Baloi, A. Pana, N. Chiosa","doi":"10.1109/ICHQP.2010.5625389","DOIUrl":"https://doi.org/10.1109/ICHQP.2010.5625389","url":null,"abstract":"The paper presents an efficient mathematical model to anticipate the effects of a transversal impedance installation in a bus of an electrical distribution network harmonic polluted, depending on the harmonic impedance seen in the respective section. There are two aspects of these effects: the amplification of the harmonic conditions in the bus, and the increase of the current on the respective impedance. A useful application of the mathematical model is the power factor correction by capacitive compensation, more, the LC resonance is possible. That's why the paper propose an algorithm to connect the capacitor banks in the buses of an electrical network or to install harmonic filters if is necessary. The algorithm is applied in a MatLab simulation for a 10 buses network.","PeriodicalId":180078,"journal":{"name":"Proceedings of 14th International Conference on Harmonics and Quality of Power - ICHQP 2010","volume":"217 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":"131891321","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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