Pub Date : 2022-05-29DOI: 10.1109/ICHQP53011.2022.9808670
V. Khokhlov, F. Möller, Jan Meyer, P. Schegner
IEC SC77A WG8 discusses a revision of compatibility level for harmonics in industrial networks. Following the assumption that these levels are likely to be adopted for public low voltage networks, some concerns about the possible effects of increased compatibility levels on electrical equipment used in public low voltage networks are expressed by experts. This paper summarizes the results of an initial study on the immunity of mass-market electrical appliances to harmonic distortion based on existing and expected compatibility levels. It intends to provide input for the ongoing discussion in IEC SC77A WG8 about appropriate compatibility levels acceptable for all stakeholders.
{"title":"Immunity of Mass-market Electrical Appliances to Harmonic Distortion of the Supply Voltage","authors":"V. Khokhlov, F. Möller, Jan Meyer, P. Schegner","doi":"10.1109/ICHQP53011.2022.9808670","DOIUrl":"https://doi.org/10.1109/ICHQP53011.2022.9808670","url":null,"abstract":"IEC SC77A WG8 discusses a revision of compatibility level for harmonics in industrial networks. Following the assumption that these levels are likely to be adopted for public low voltage networks, some concerns about the possible effects of increased compatibility levels on electrical equipment used in public low voltage networks are expressed by experts. This paper summarizes the results of an initial study on the immunity of mass-market electrical appliances to harmonic distortion based on existing and expected compatibility levels. It intends to provide input for the ongoing discussion in IEC SC77A WG8 about appropriate compatibility levels acceptable for all stakeholders.","PeriodicalId":249133,"journal":{"name":"2022 20th International Conference on Harmonics & Quality of Power (ICHQP)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123565897","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 : 2022-05-29DOI: 10.1109/ICHQP53011.2022.9808821
Isabelle Löfgren, E. Gutiérrez-Ballesteros, S. Rönnberg
In this paper, medium voltage data from four locations are analyzed for rapid voltage changes (RVCs). The definition of an RVC event given in IEC 61000-4-30 is altered to investigate how the results of an analysis changes. The alterations made to the RVC definition are the RVC threshold and the number of half-cycles required for stability. It is shown that a certain change in the definition will not necessarily affect the results in the same way for data obtained at different locations. One important conclusion is that changing the definition of an RVC can lead to an initial steady-state not being found within a measurement, thus giving zero RVCs in the results. It is therefore of great importance to take this into consideration so as not to incorrectly assume that the alteration made to the definition makes the data appear more stable to the detection algorithm. The motivation for this work is to show that an RVC event is not a black-and-white concept but is highly influenced by revisions to its formal definition.
{"title":"Modified Method of Detecting Rapid Voltage Changes in a Medium Voltage Network","authors":"Isabelle Löfgren, E. Gutiérrez-Ballesteros, S. Rönnberg","doi":"10.1109/ICHQP53011.2022.9808821","DOIUrl":"https://doi.org/10.1109/ICHQP53011.2022.9808821","url":null,"abstract":"In this paper, medium voltage data from four locations are analyzed for rapid voltage changes (RVCs). The definition of an RVC event given in IEC 61000-4-30 is altered to investigate how the results of an analysis changes. The alterations made to the RVC definition are the RVC threshold and the number of half-cycles required for stability. It is shown that a certain change in the definition will not necessarily affect the results in the same way for data obtained at different locations. One important conclusion is that changing the definition of an RVC can lead to an initial steady-state not being found within a measurement, thus giving zero RVCs in the results. It is therefore of great importance to take this into consideration so as not to incorrectly assume that the alteration made to the definition makes the data appear more stable to the detection algorithm. The motivation for this work is to show that an RVC event is not a black-and-white concept but is highly influenced by revisions to its formal definition.","PeriodicalId":249133,"journal":{"name":"2022 20th International Conference on Harmonics & Quality of Power (ICHQP)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128520691","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 : 2022-05-29DOI: 10.1109/ICHQP53011.2022.9808715
F. Pilo, G. Pisano, S. Ruggeri, G. G. Soma, D. Falabretti, S. Grillo, F. Gulotta
Low voltage (LV) distribution networks mainly feed single-phase customers. Even if the end-users of a given LV network may have similar electrical behaviors, unbalances among the three-phase loading are extremely common. This issue is exacerbated by the appearance of new single-phase intensive and often coincident loads, such as the electric vehicles’ residential charging stations. In this work, a methodology is proposed to evaluate the effects of residential charging on the quality of supply voltage of LV grids. Then, a decentralised approach is proposed, based on the multi-agent system technology, which allows the different flexibility resources available on the grid to act together to achieve a global goal. In the scenario analysed, the agents cooperate to regulate the network nodal voltage, taking into account the characteristics of the resources they are controlling and the needs of distributed energy resources’ owners. A case study derived from a real portion of the Italian distribution system demonstrates the validity of the approach in solving the network operation criticalities (i.e., voltage regulation issues, line congestions, voltage unbalances, etc.).
{"title":"Impact of Electrical Vehicle Residential Charging Stations on the Quality of the Low Voltage Network Supply","authors":"F. Pilo, G. Pisano, S. Ruggeri, G. G. Soma, D. Falabretti, S. Grillo, F. Gulotta","doi":"10.1109/ICHQP53011.2022.9808715","DOIUrl":"https://doi.org/10.1109/ICHQP53011.2022.9808715","url":null,"abstract":"Low voltage (LV) distribution networks mainly feed single-phase customers. Even if the end-users of a given LV network may have similar electrical behaviors, unbalances among the three-phase loading are extremely common. This issue is exacerbated by the appearance of new single-phase intensive and often coincident loads, such as the electric vehicles’ residential charging stations. In this work, a methodology is proposed to evaluate the effects of residential charging on the quality of supply voltage of LV grids. Then, a decentralised approach is proposed, based on the multi-agent system technology, which allows the different flexibility resources available on the grid to act together to achieve a global goal. In the scenario analysed, the agents cooperate to regulate the network nodal voltage, taking into account the characteristics of the resources they are controlling and the needs of distributed energy resources’ owners. A case study derived from a real portion of the Italian distribution system demonstrates the validity of the approach in solving the network operation criticalities (i.e., voltage regulation issues, line congestions, voltage unbalances, etc.).","PeriodicalId":249133,"journal":{"name":"2022 20th International Conference on Harmonics & Quality of Power (ICHQP)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130371955","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 : 2022-05-29DOI: 10.1109/ICHQP53011.2022.9808804
Kazi Main Uddin Ahmed, M. Bollen, M. Alvarez, S. S. Letha
The internal power condition system (IPCS) in data centers is prone to have cable faults that cause voltage dips and swells. The voltage dips and swells impact the power supply units (PSUs) with the servers. The servers connected with the PUSs restart or turn-off when the input voltage comes out of the voltage-tolerance range. This paper analyses the impact of such voltage disturbances on server outages due to a single-phase fault in the IPCS. The voltage-tolerance range of the PSUs is considered according to the guideline of the Information Technology Industry Council (ITIC). The voltage dip propagates to the healthy load sections from the fault location, while voltage swells are also observed due to sudden load reduction. Moreover, the current limitation mode of the inverter in the uninterrupted power supply (UPS) is identified as a cause of voltage dip to almost zero experienced by the PSUs. The reliability of the data center considering the outage probability of the servers are finally quantified to show the impacts of the voltage dips and swells in the IPCS.
{"title":"The Impacts of Voltage Disturbances Due to Faults In the Power Supply System of A Data Center","authors":"Kazi Main Uddin Ahmed, M. Bollen, M. Alvarez, S. S. Letha","doi":"10.1109/ICHQP53011.2022.9808804","DOIUrl":"https://doi.org/10.1109/ICHQP53011.2022.9808804","url":null,"abstract":"The internal power condition system (IPCS) in data centers is prone to have cable faults that cause voltage dips and swells. The voltage dips and swells impact the power supply units (PSUs) with the servers. The servers connected with the PUSs restart or turn-off when the input voltage comes out of the voltage-tolerance range. This paper analyses the impact of such voltage disturbances on server outages due to a single-phase fault in the IPCS. The voltage-tolerance range of the PSUs is considered according to the guideline of the Information Technology Industry Council (ITIC). The voltage dip propagates to the healthy load sections from the fault location, while voltage swells are also observed due to sudden load reduction. Moreover, the current limitation mode of the inverter in the uninterrupted power supply (UPS) is identified as a cause of voltage dip to almost zero experienced by the PSUs. The reliability of the data center considering the outage probability of the servers are finally quantified to show the impacts of the voltage dips and swells in the IPCS.","PeriodicalId":249133,"journal":{"name":"2022 20th International Conference on Harmonics & Quality of Power (ICHQP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130458436","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 : 2022-05-29DOI: 10.1109/ICHQP53011.2022.9808748
G. Singh, W. Howe
The emergence of large Electric Vehicle (EV) charging facilities in the United States (U.S.) and a lack of knowledge about the Power Quality (PQ) impact of such facilities on the grid has led to fears of increased Electromagnetic Interference (EMI) and harmonic compliance issues. The goal of the research presented in this paper is to demonstrate tools and techniques that can be utilized by utilities to predict this PQ impact. This can help utilities better plan the integration of such facilities and maintain continued grid and load compatibility. In this paper, generic EMTP simulation models of an EV charging facility are first developed and then compared against actual PQ measurements made at EV charging facilities. The simulations show that large EV charging facilities do pose a risk of harmonic incompliance to the power system, and under certain conditions, distortion between 2 and 150 kHz can also pose a risk. Finally, the paper closes with a discussion of the implications of the findings for utilities and the importance of system strength to determine the appropriate feeder for EV charging facility integration.
{"title":"Assessing the Harmonic and Supraharmonic Impact of Electric Vehicle Charging Facilities","authors":"G. Singh, W. Howe","doi":"10.1109/ICHQP53011.2022.9808748","DOIUrl":"https://doi.org/10.1109/ICHQP53011.2022.9808748","url":null,"abstract":"The emergence of large Electric Vehicle (EV) charging facilities in the United States (U.S.) and a lack of knowledge about the Power Quality (PQ) impact of such facilities on the grid has led to fears of increased Electromagnetic Interference (EMI) and harmonic compliance issues. The goal of the research presented in this paper is to demonstrate tools and techniques that can be utilized by utilities to predict this PQ impact. This can help utilities better plan the integration of such facilities and maintain continued grid and load compatibility. In this paper, generic EMTP simulation models of an EV charging facility are first developed and then compared against actual PQ measurements made at EV charging facilities. The simulations show that large EV charging facilities do pose a risk of harmonic incompliance to the power system, and under certain conditions, distortion between 2 and 150 kHz can also pose a risk. Finally, the paper closes with a discussion of the implications of the findings for utilities and the importance of system strength to determine the appropriate feeder for EV charging facility integration.","PeriodicalId":249133,"journal":{"name":"2022 20th International Conference on Harmonics & Quality of Power (ICHQP)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127219361","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 : 2022-05-29DOI: 10.1109/ICHQP53011.2022.9808546
G. Balaban, G. Lazaroiu, V. Dumbrava, N. Golovanov, M. Roscia
This paper deals with the analysis of the Bucharest Metropolitan area in terms of compliance with power quality levels. In the Bucharest area, end users are affected by unplanned interruptions, which occur as a result of unapproapriate maneuvers or improper operation of the electricity network. The presence of a very large number of electric cables leads to the difficulty of maintaining the voltage level within acceptable limits. In a developed network with many elements that contribute to busbars fault levels, it is very important how the network operates, for example the use of a radial power supply diagram for users.
{"title":"Impact of Urbanization Development on Power System Operation","authors":"G. Balaban, G. Lazaroiu, V. Dumbrava, N. Golovanov, M. Roscia","doi":"10.1109/ICHQP53011.2022.9808546","DOIUrl":"https://doi.org/10.1109/ICHQP53011.2022.9808546","url":null,"abstract":"This paper deals with the analysis of the Bucharest Metropolitan area in terms of compliance with power quality levels. In the Bucharest area, end users are affected by unplanned interruptions, which occur as a result of unapproapriate maneuvers or improper operation of the electricity network. The presence of a very large number of electric cables leads to the difficulty of maintaining the voltage level within acceptable limits. In a developed network with many elements that contribute to busbars fault levels, it is very important how the network operates, for example the use of a radial power supply diagram for users.","PeriodicalId":249133,"journal":{"name":"2022 20th International Conference on Harmonics & Quality of Power (ICHQP)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121437345","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 : 2022-05-29DOI: 10.1109/ICHQP53011.2022.9808466
R. Langella, A. Testa, Vincenzo Vendemia, J. Drapela
In this paper, a new accurate and comprehensive analytical model of harmonic and interharmonic distortion produced by a single-phase AC/DC diode rectifier (DBR) is presented. Its main and new characteristic is the ability to consider the presence of interharmonics in addition to harmonics in the voltage at the terminals of DBR due to the background voltage. Analytical expressions able to predict DC voltage and AC current in time domain are obtained. Several numerical and experimental tests have been performed, but in this paper only the numerical and experimental validation on a commercial equipment (i.e. CFL lamp) showing very accurate results is reported for space limitations.
{"title":"New Comprehensive Analytical Model of Single-Phase AC/DC Diode Rectifiers in the Presence of Interharmonics in Supply Voltage","authors":"R. Langella, A. Testa, Vincenzo Vendemia, J. Drapela","doi":"10.1109/ICHQP53011.2022.9808466","DOIUrl":"https://doi.org/10.1109/ICHQP53011.2022.9808466","url":null,"abstract":"In this paper, a new accurate and comprehensive analytical model of harmonic and interharmonic distortion produced by a single-phase AC/DC diode rectifier (DBR) is presented. Its main and new characteristic is the ability to consider the presence of interharmonics in addition to harmonics in the voltage at the terminals of DBR due to the background voltage. Analytical expressions able to predict DC voltage and AC current in time domain are obtained. Several numerical and experimental tests have been performed, but in this paper only the numerical and experimental validation on a commercial equipment (i.e. CFL lamp) showing very accurate results is reported for space limitations.","PeriodicalId":249133,"journal":{"name":"2022 20th International Conference on Harmonics & Quality of Power (ICHQP)","volume":"257 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133434260","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 : 2022-05-29DOI: 10.1109/ICHQP53011.2022.9808737
Lazar Scekic, S. Mujović
Due to the increasing government support and decreasing installation prices, the rapid proliferation of grid-connected photovoltaic systems has been recorded in the past decade. Their integration is accompanied by harmonic pollution of the distribution systems, resulting from the application of power electronic converters. Therefore, extensive studies need to be performed before their commission to minimize their harmonic impact. This paper presents a thorough harmonic analysis of grid-connected photovoltaic systems in a historical meteorological framework. Temporal patterns of the harmonic emissions and the resulting distorting effects have been identified. In addition, numerical expressions quantifying the temporal variations of individual current harmonics have been developed, which enables their straightforward addition to various power system studies.
{"title":"Long-Term Harmonic Analysis of Grid-Connected Photovoltaic Systems","authors":"Lazar Scekic, S. Mujović","doi":"10.1109/ICHQP53011.2022.9808737","DOIUrl":"https://doi.org/10.1109/ICHQP53011.2022.9808737","url":null,"abstract":"Due to the increasing government support and decreasing installation prices, the rapid proliferation of grid-connected photovoltaic systems has been recorded in the past decade. Their integration is accompanied by harmonic pollution of the distribution systems, resulting from the application of power electronic converters. Therefore, extensive studies need to be performed before their commission to minimize their harmonic impact. This paper presents a thorough harmonic analysis of grid-connected photovoltaic systems in a historical meteorological framework. Temporal patterns of the harmonic emissions and the resulting distorting effects have been identified. In addition, numerical expressions quantifying the temporal variations of individual current harmonics have been developed, which enables their straightforward addition to various power system studies.","PeriodicalId":249133,"journal":{"name":"2022 20th International Conference on Harmonics & Quality of Power (ICHQP)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115999084","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 : 2022-05-29DOI: 10.1109/ICHQP53011.2022.9808767
A. Nassif, K. Wheeler, R. Torquato, W. Freitas
The guiding principles of climate change have driven the adoption of large-scale variable sources of renewable generation. The consequential application of energy storage is imperative to enable the integration of renewable variable sources by enhancing resource adequacy and supporting the grid. The main realized and potential benefits of energy storage have been identified as increased system stability, dispatchability, inertia, and economics. With the declining storage prices and the proliferation of the technology, electric utilities must adapt and understand the impact of such technology into their system. Three important concerns to electric utilities are potential degradation of power quality, potential damage to customer facilities, and most importantly, the impact on safety. Harmonic emissions of inverter-based resources are always an important subject and fit the power quality description. The second concern, as identified in this paper, is load rejection overvoltage, often brought up in recent inverter-based resources research. Thirdly, identified as a safety concern, the timely detection and extinction of an island is paramount. Modern inverters contain native anti-islanding schemes that must be convincing to electric utilities if communication-based direct transfer trip is not present. Based on this background, this paper presents the operational field verification of a 20MVA, 20MWh (1C) battery energy storage system connected to a 25kV distribution feeder. Measurement results were collected and analyzed during the commissioning phase and the results are reported in this paper.
{"title":"On-Site Harmonic, Load Rejection Overvoltage, and Anti-Islanding Scheme Verification of a 20 MW BESS Interconnection to a Distribution Feeder","authors":"A. Nassif, K. Wheeler, R. Torquato, W. Freitas","doi":"10.1109/ICHQP53011.2022.9808767","DOIUrl":"https://doi.org/10.1109/ICHQP53011.2022.9808767","url":null,"abstract":"The guiding principles of climate change have driven the adoption of large-scale variable sources of renewable generation. The consequential application of energy storage is imperative to enable the integration of renewable variable sources by enhancing resource adequacy and supporting the grid. The main realized and potential benefits of energy storage have been identified as increased system stability, dispatchability, inertia, and economics. With the declining storage prices and the proliferation of the technology, electric utilities must adapt and understand the impact of such technology into their system. Three important concerns to electric utilities are potential degradation of power quality, potential damage to customer facilities, and most importantly, the impact on safety. Harmonic emissions of inverter-based resources are always an important subject and fit the power quality description. The second concern, as identified in this paper, is load rejection overvoltage, often brought up in recent inverter-based resources research. Thirdly, identified as a safety concern, the timely detection and extinction of an island is paramount. Modern inverters contain native anti-islanding schemes that must be convincing to electric utilities if communication-based direct transfer trip is not present. Based on this background, this paper presents the operational field verification of a 20MVA, 20MWh (1C) battery energy storage system connected to a 25kV distribution feeder. Measurement results were collected and analyzed during the commissioning phase and the results are reported in this paper.","PeriodicalId":249133,"journal":{"name":"2022 20th International Conference on Harmonics & Quality of Power (ICHQP)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115662641","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 : 2022-05-29DOI: 10.1109/ICHQP53011.2022.9808706
J. Klusacek, J. Drapela, R. Langella
Presence of a power generating plant in a three phase customers’ installation associated with prosumers may lead to unbalanced bidirectional energy flows at point of connection into relevant distribution system. This study shows that current metrics of energy measurement and registration in three phase revenue meters may fail in a fair charging for the distribution system usage as an inherent phase-to-phase balancer. Alternatively, positive sequence power/ energy measurement based metric is tested and proposed to be employed. The comparative study is performed on representative unbalanced cases, which may be reached by the prosumers naturally and even intentionally and it is shown how much the grid usage as a balancer might be charged more fairly when registering positive sequence power/ energy. Furthermore, it is shown that the increase in the system losses caused by unbalanced prosumers; in comparison to equivalent symmetrical cases of the same net-power; can be estimated from negative and zero sequence power measurement at the point of connection.
{"title":"Power Symmetrical Components as Grid Usage Indicator for Unbalanced Prosumers","authors":"J. Klusacek, J. Drapela, R. Langella","doi":"10.1109/ICHQP53011.2022.9808706","DOIUrl":"https://doi.org/10.1109/ICHQP53011.2022.9808706","url":null,"abstract":"Presence of a power generating plant in a three phase customers’ installation associated with prosumers may lead to unbalanced bidirectional energy flows at point of connection into relevant distribution system. This study shows that current metrics of energy measurement and registration in three phase revenue meters may fail in a fair charging for the distribution system usage as an inherent phase-to-phase balancer. Alternatively, positive sequence power/ energy measurement based metric is tested and proposed to be employed. The comparative study is performed on representative unbalanced cases, which may be reached by the prosumers naturally and even intentionally and it is shown how much the grid usage as a balancer might be charged more fairly when registering positive sequence power/ energy. Furthermore, it is shown that the increase in the system losses caused by unbalanced prosumers; in comparison to equivalent symmetrical cases of the same net-power; can be estimated from negative and zero sequence power measurement at the point of connection.","PeriodicalId":249133,"journal":{"name":"2022 20th International Conference on Harmonics & Quality of Power (ICHQP)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116073498","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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