Pub Date : 2021-11-24DOI: 10.1109/urucon53396.2021.9647151
{"title":"Tutorial: Zero touch management and orchestration of network slices in 5G and beyond networks","authors":"","doi":"10.1109/urucon53396.2021.9647151","DOIUrl":"https://doi.org/10.1109/urucon53396.2021.9647151","url":null,"abstract":"","PeriodicalId":337257,"journal":{"name":"2021 IEEE URUCON","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129839581","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 : 2021-11-24DOI: 10.1109/urucon53396.2021.9647112
Jorge Sancho Chaverri, Francisco Escobar Prado, J. Garcia, G. Valverde
In this work, a comparison between aggregate (DER_A) and detailed (DER_D) models of distributed energy resources is presented. We evaluate the accuracy of aggregate representations of small-scale units as seen from the transmission network. The comparison focuses on the behavior of the tripping logic according to the ride-through characteristics. The simulations take into account the response of old and newer inverters during large disturbances in the bulk power system. The paper demonstrates that an aggregate model may fail to represent the response of hundreds or thousands of small-scale units. Hence, new aggregate models should account for the limitations identified in this work.
{"title":"Comparison of Ride-Through Characteristics in Aggregate and Detailed Models of DERs","authors":"Jorge Sancho Chaverri, Francisco Escobar Prado, J. Garcia, G. Valverde","doi":"10.1109/urucon53396.2021.9647112","DOIUrl":"https://doi.org/10.1109/urucon53396.2021.9647112","url":null,"abstract":"In this work, a comparison between aggregate (DER_A) and detailed (DER_D) models of distributed energy resources is presented. We evaluate the accuracy of aggregate representations of small-scale units as seen from the transmission network. The comparison focuses on the behavior of the tripping logic according to the ride-through characteristics. The simulations take into account the response of old and newer inverters during large disturbances in the bulk power system. The paper demonstrates that an aggregate model may fail to represent the response of hundreds or thousands of small-scale units. Hence, new aggregate models should account for the limitations identified in this work.","PeriodicalId":337257,"journal":{"name":"2021 IEEE URUCON","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129882979","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 : 2021-11-24DOI: 10.1109/urucon53396.2021.9647132
Robson Fabrício Pinto Moreira, Vinicius Marins Cleff, E. G. Souza, Chiara D. Do Nascimento
In this work, it is presented an algorithm based on the directional gradient method for distinguishing source surge current, or inrush currents, from transitory fault currents in transformers. Methods and simulation are introduced and the effectiveness of the gradient method is investigated for situations that can lead to a false operational of the protection systems. Three special cases, composed of a combination of external faults with magnetizing inrush current for a $Delta -Delta$, 138/13.8 kV - 30 kVA power transformer are studied. The power system transformer is modeled in the software ATP-Draw by the component SATTRAFO. The results indicate that the gradient method is effective for detecting and distinguishing inrush from fault currents when the angle of the gradient of the primary current together with its amplitude is appropriately used as boundary conditions. As a consequence, the algorithm could be used as a fast single/combined one cycle time-domain detection method in order to optimize the 87T protection function.
{"title":"Gradient-based algorithm for the distinction of fault and inrush currents in low power transformers","authors":"Robson Fabrício Pinto Moreira, Vinicius Marins Cleff, E. G. Souza, Chiara D. Do Nascimento","doi":"10.1109/urucon53396.2021.9647132","DOIUrl":"https://doi.org/10.1109/urucon53396.2021.9647132","url":null,"abstract":"In this work, it is presented an algorithm based on the directional gradient method for distinguishing source surge current, or inrush currents, from transitory fault currents in transformers. Methods and simulation are introduced and the effectiveness of the gradient method is investigated for situations that can lead to a false operational of the protection systems. Three special cases, composed of a combination of external faults with magnetizing inrush current for a $Delta -Delta$, 138/13.8 kV - 30 kVA power transformer are studied. The power system transformer is modeled in the software ATP-Draw by the component SATTRAFO. The results indicate that the gradient method is effective for detecting and distinguishing inrush from fault currents when the angle of the gradient of the primary current together with its amplitude is appropriately used as boundary conditions. As a consequence, the algorithm could be used as a fast single/combined one cycle time-domain detection method in order to optimize the 87T protection function.","PeriodicalId":337257,"journal":{"name":"2021 IEEE URUCON","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125266405","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 : 2021-11-24DOI: 10.1109/urucon53396.2021.9647323
D. Ferreyra
In typical single-phase steady-state equivalent circuits for distribution transformers, a parallel circuit branch is used to represent no-load conditions. Currently, in usual engineering practice and teaching, this branch is composed of a resistance and a reactance connected in a parallel arrangement. However, a series arrangement was once used by some authors for the same branch, naturally using different resistance and reactance values. Besides, a fairly recent teaching reference has been found to refer indirectly to such series arrangement, and it has also been frequently noted that several Electric Machinery students tend to erroneously adopt a series arrangement view for this branch. Although the parallel arrangement is far more common in the literature, it seems that its practical advantages should be more explicitly detailed. This work aims at providing practical justifications for such parallel arrangement to represent this branch, as opposed to a series arrangement.
{"title":"Revisiting no-load parameters in steady-state equivalent circuits for distribution transformers","authors":"D. Ferreyra","doi":"10.1109/urucon53396.2021.9647323","DOIUrl":"https://doi.org/10.1109/urucon53396.2021.9647323","url":null,"abstract":"In typical single-phase steady-state equivalent circuits for distribution transformers, a parallel circuit branch is used to represent no-load conditions. Currently, in usual engineering practice and teaching, this branch is composed of a resistance and a reactance connected in a parallel arrangement. However, a series arrangement was once used by some authors for the same branch, naturally using different resistance and reactance values. Besides, a fairly recent teaching reference has been found to refer indirectly to such series arrangement, and it has also been frequently noted that several Electric Machinery students tend to erroneously adopt a series arrangement view for this branch. Although the parallel arrangement is far more common in the literature, it seems that its practical advantages should be more explicitly detailed. This work aims at providing practical justifications for such parallel arrangement to represent this branch, as opposed to a series arrangement.","PeriodicalId":337257,"journal":{"name":"2021 IEEE URUCON","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127727024","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 : 2021-11-24DOI: 10.1109/urucon53396.2021.9647234
Carlos Jair Santin Cruz, G. Dolecek
This paper presents a spread spectrum-based audio watermarking system, where the message embedding is performed in the time domain. Similarly, as in a communication system, a channel coding is used to improve the performance of the audio watermarking system. Our goal here is to explore the performance using convolutional coding in a Spread Spectrum-based audio watermarking system to get the boundaries and the best configuration in the system. To this end, data payload, imperceptibility, and robustness are tested. Usually the number of bits used for quantization, improves the performance. However, we demonstrated here that the increasing number of bits more than 8 will not affect the performance. This is important result which may result in better use of computational resources.
{"title":"Exploring Performance of a Spread Spectrum-Based Audio Watermarking System Using Convolutional Coding","authors":"Carlos Jair Santin Cruz, G. Dolecek","doi":"10.1109/urucon53396.2021.9647234","DOIUrl":"https://doi.org/10.1109/urucon53396.2021.9647234","url":null,"abstract":"This paper presents a spread spectrum-based audio watermarking system, where the message embedding is performed in the time domain. Similarly, as in a communication system, a channel coding is used to improve the performance of the audio watermarking system. Our goal here is to explore the performance using convolutional coding in a Spread Spectrum-based audio watermarking system to get the boundaries and the best configuration in the system. To this end, data payload, imperceptibility, and robustness are tested. Usually the number of bits used for quantization, improves the performance. However, we demonstrated here that the increasing number of bits more than 8 will not affect the performance. This is important result which may result in better use of computational resources.","PeriodicalId":337257,"journal":{"name":"2021 IEEE URUCON","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124545958","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 : 2021-11-24DOI: 10.1109/urucon53396.2021.9647331
Agustin Rodriguez Esteva, P. Monzón, J. Román
This work is complementary to the implementation of a large automation project for a public sewer system. The main focus was the simulations-based analysis of the hydraulics of the system and the real time linking with the controller. The purpose was to test different sets of routines and parameters prior to the start up of the real system running in the 800xA DCS (Distributed Control System) platform from ABB. The simulation was programmed in the Matlab-Simulink environment, in order to analyze the behavior of the plant against different input flows and variations on it's internal parameters. The simulation framework communicates directly with the physical controller through the Open Platform Communication protocol (OPC).
{"title":"Distributed control of the sewage system","authors":"Agustin Rodriguez Esteva, P. Monzón, J. Román","doi":"10.1109/urucon53396.2021.9647331","DOIUrl":"https://doi.org/10.1109/urucon53396.2021.9647331","url":null,"abstract":"This work is complementary to the implementation of a large automation project for a public sewer system. The main focus was the simulations-based analysis of the hydraulics of the system and the real time linking with the controller. The purpose was to test different sets of routines and parameters prior to the start up of the real system running in the 800xA DCS (Distributed Control System) platform from ABB. The simulation was programmed in the Matlab-Simulink environment, in order to analyze the behavior of the plant against different input flows and variations on it's internal parameters. The simulation framework communicates directly with the physical controller through the Open Platform Communication protocol (OPC).","PeriodicalId":337257,"journal":{"name":"2021 IEEE URUCON","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121320448","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 : 2021-11-24DOI: 10.1109/urucon53396.2021.9647352
{"title":"Keynote: Vehículos autónomos para el agro","authors":"","doi":"10.1109/urucon53396.2021.9647352","DOIUrl":"https://doi.org/10.1109/urucon53396.2021.9647352","url":null,"abstract":"","PeriodicalId":337257,"journal":{"name":"2021 IEEE URUCON","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121205214","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 : 2021-11-24DOI: 10.1109/urucon53396.2021.9647142
Raúl Marichal, D. Vallejo, E. Dufrechou, P. Ezzatti
The SimSEE is a simulation software used/designed to aid the decision-making in the electric energy generation market. It is based on Stochastic Dynamic Programming technique and allows to simulate the contribution of several energy sources, such as hydro-electric, solar, thermal or wind energy, to a specific electrical network. Uruguay's electric generation system has considerably grown and diversified in the past decades. This evolution implies potentially more complex scenarios and also motivates a more precise modeling of some electric sources. Therefore, the computational cost of the simulations is also expected to rise and the use of HPC techniques becomes mandatory. In this work we study the performance bottlenecks in the SimSEE tool. Additionally, and considering the previously mentioned results, we design a parallelization strategy that enables its acceleration using massively-parallel devices such as GPUs.
{"title":"Towards a massively-parallel version of the SimSEE","authors":"Raúl Marichal, D. Vallejo, E. Dufrechou, P. Ezzatti","doi":"10.1109/urucon53396.2021.9647142","DOIUrl":"https://doi.org/10.1109/urucon53396.2021.9647142","url":null,"abstract":"The SimSEE is a simulation software used/designed to aid the decision-making in the electric energy generation market. It is based on Stochastic Dynamic Programming technique and allows to simulate the contribution of several energy sources, such as hydro-electric, solar, thermal or wind energy, to a specific electrical network. Uruguay's electric generation system has considerably grown and diversified in the past decades. This evolution implies potentially more complex scenarios and also motivates a more precise modeling of some electric sources. Therefore, the computational cost of the simulations is also expected to rise and the use of HPC techniques becomes mandatory. In this work we study the performance bottlenecks in the SimSEE tool. Additionally, and considering the previously mentioned results, we design a parallelization strategy that enables its acceleration using massively-parallel devices such as GPUs.","PeriodicalId":337257,"journal":{"name":"2021 IEEE URUCON","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121401350","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 : 2021-11-24DOI: 10.1109/urucon53396.2021.9647427
No English translation of this document was provided by the author or conference organizers.
作者或会议组织者没有提供本文档的英文翻译。
{"title":"Tutorial: Despacho óptimo de energía con asimilación de pronósticos [Not i English]","authors":"","doi":"10.1109/urucon53396.2021.9647427","DOIUrl":"https://doi.org/10.1109/urucon53396.2021.9647427","url":null,"abstract":"No English translation of this document was provided by the author or conference organizers.","PeriodicalId":337257,"journal":{"name":"2021 IEEE URUCON","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126322022","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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