Pub Date : 2020-09-23DOI: 10.23919/AEIT50178.2020.9241201
Marie Munster, Daniel Møller Sneum, R. Bramstoft, B. Elmegaard, F. Bühler, I. Losa, A. Iliceto, A. Oudalov, D. Elsaesser, Spyros Giannellos, G. Strbac
The present paper summarizes the analysis of the Task Force of WG1 experts of the ETIP SNET platform that prepared a position paper aimed at describing the pathway to enable an integration of different energy carriers in order to support the achievement of the goals of the energy transition in 2050.
{"title":"Sector Coupling: Concepts, Potentials and Barriers","authors":"Marie Munster, Daniel Møller Sneum, R. Bramstoft, B. Elmegaard, F. Bühler, I. Losa, A. Iliceto, A. Oudalov, D. Elsaesser, Spyros Giannellos, G. Strbac","doi":"10.23919/AEIT50178.2020.9241201","DOIUrl":"https://doi.org/10.23919/AEIT50178.2020.9241201","url":null,"abstract":"The present paper summarizes the analysis of the Task Force of WG1 experts of the ETIP SNET platform that prepared a position paper aimed at describing the pathway to enable an integration of different energy carriers in order to support the achievement of the goals of the energy transition in 2050.","PeriodicalId":6689,"journal":{"name":"2020 AEIT International Annual Conference (AEIT)","volume":"120 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89096493","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 : 2020-09-23DOI: 10.23919/AEIT50178.2020.9241117
A. L'Abbate, G. Fulli, M. L. Scala
This paper, after providing an overview on key past and ongoing continental studies, with particular focus on European and neighboring regions, presents a methodological approach for an optimal long-term development of an intercontinental grid based on HVDC corridors.
{"title":"From pan-continental to inter-continental systems analyses: planning HVDC corridors in long-term grid studies","authors":"A. L'Abbate, G. Fulli, M. L. Scala","doi":"10.23919/AEIT50178.2020.9241117","DOIUrl":"https://doi.org/10.23919/AEIT50178.2020.9241117","url":null,"abstract":"This paper, after providing an overview on key past and ongoing continental studies, with particular focus on European and neighboring regions, presents a methodological approach for an optimal long-term development of an intercontinental grid based on HVDC corridors.","PeriodicalId":6689,"journal":{"name":"2020 AEIT International Annual Conference (AEIT)","volume":"1 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86065760","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 : 2020-09-23DOI: 10.23919/AEIT50178.2020.9241129
G. Sanchís, A. Iliceto, Nicolas Chamollet
During the last years, the CIGRE C1.35 has performed a pioneer quantitative pre-feasibility study for the concept of a global electricity network. The study has explored the economic costs and benefits of interconnecting all continents as one key enabler of a Global Sustainable electricity system.The present paper summarizes the results of this study in which HVDC interconnections play a key role.
{"title":"Global Sustainable electricity System based on HVDC interconnections","authors":"G. Sanchís, A. Iliceto, Nicolas Chamollet","doi":"10.23919/AEIT50178.2020.9241129","DOIUrl":"https://doi.org/10.23919/AEIT50178.2020.9241129","url":null,"abstract":"During the last years, the CIGRE C1.35 has performed a pioneer quantitative pre-feasibility study for the concept of a global electricity network. The study has explored the economic costs and benefits of interconnecting all continents as one key enabler of a Global Sustainable electricity system.The present paper summarizes the results of this study in which HVDC interconnections play a key role.","PeriodicalId":6689,"journal":{"name":"2020 AEIT International Annual Conference (AEIT)","volume":"109 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82976286","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 : 2020-09-23DOI: 10.23919/AEIT50178.2020.9241157
Nicola Zanatta, S. Pistollato, T. Caldognetto, P. Mattavelli
This paper proposes a triple phase shift modulation with an optimization technique that aims at maximizing the efficiency of the Dual Active Bridge (DAB) converter. The DAB converter finds application in smart dc power systems, including the electrification of the powertrain of vehicles and vehicles-togrid applications, where loss minimization is crucial. In this paper, favorable modulation parameters are found first, by aiming at minimum rms currents and zero voltage switching (ZVS) for the converter switches. Then, on the basis of the closed-form analytical description of the converter behavior over the determined favorable modulation patterns, efficiency improvement trajectories in the modulation planes are identified. It is shown that such trajectories lead to optimal efficiency operation, which can be exploited to implement fast closedloop efficiency optimization methods. The reported results are verified experimentally on a 1.5 kW prototype, showing that the proposed approach allows to achieve the best-efficiency operation of the converter.
{"title":"Triple-Phase Shift Modulation and Tuning Technique to Improve the Efficiency of the Dual Active Bridge Converter","authors":"Nicola Zanatta, S. Pistollato, T. Caldognetto, P. Mattavelli","doi":"10.23919/AEIT50178.2020.9241157","DOIUrl":"https://doi.org/10.23919/AEIT50178.2020.9241157","url":null,"abstract":"This paper proposes a triple phase shift modulation with an optimization technique that aims at maximizing the efficiency of the Dual Active Bridge (DAB) converter. The DAB converter finds application in smart dc power systems, including the electrification of the powertrain of vehicles and vehicles-togrid applications, where loss minimization is crucial. In this paper, favorable modulation parameters are found first, by aiming at minimum rms currents and zero voltage switching (ZVS) for the converter switches. Then, on the basis of the closed-form analytical description of the converter behavior over the determined favorable modulation patterns, efficiency improvement trajectories in the modulation planes are identified. It is shown that such trajectories lead to optimal efficiency operation, which can be exploited to implement fast closedloop efficiency optimization methods. The reported results are verified experimentally on a 1.5 kW prototype, showing that the proposed approach allows to achieve the best-efficiency operation of the converter.","PeriodicalId":6689,"journal":{"name":"2020 AEIT International Annual Conference (AEIT)","volume":"58 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80268259","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 : 2020-09-23DOI: 10.23919/AEIT50178.2020.9241204
G. Donnini, E. Carlini, G. Giannuzzi, R. Zaottini, C. Pisani, E. Chiodo, D. Lauria, F. Mottola
Large-scale penetration of renewable energy sources in power systems is essentially related to the need of reducing the environmental impact caused by the fossil-fuel. As well known, the interface between the power grid and this kind of energy resource is achieved by power converters, with a consequent dynamic behavior quite different from the synchronous generators. This matter involves negative impacts on the operating conditions of power systems. In this context, it is crucial to individuate estimation techniques able to predict promptly critical conditions which could, in extreme cases, compromise the stability of whole system. In this paper the authors employ an auto-regressive model which can describe the dynamic evolution of the power system inertia. The core of the procedure relies on an inertia model conceived as the sum of a periodic component and a noise stochastic process distributed according a Logistic model. The robustness of a novel estimation procedure, able to capture the dynamic evolution of the inertia, is investigated by testing two scenarios of Italian Transmission Network. The assumptions in terms of the obtained numerical results show the validity of the estimation technique and of the probabilistic characterization of the noise.
{"title":"On the Estimation of Power System Inertia accounting for Renewable Generation Penetration","authors":"G. Donnini, E. Carlini, G. Giannuzzi, R. Zaottini, C. Pisani, E. Chiodo, D. Lauria, F. Mottola","doi":"10.23919/AEIT50178.2020.9241204","DOIUrl":"https://doi.org/10.23919/AEIT50178.2020.9241204","url":null,"abstract":"Large-scale penetration of renewable energy sources in power systems is essentially related to the need of reducing the environmental impact caused by the fossil-fuel. As well known, the interface between the power grid and this kind of energy resource is achieved by power converters, with a consequent dynamic behavior quite different from the synchronous generators. This matter involves negative impacts on the operating conditions of power systems. In this context, it is crucial to individuate estimation techniques able to predict promptly critical conditions which could, in extreme cases, compromise the stability of whole system. In this paper the authors employ an auto-regressive model which can describe the dynamic evolution of the power system inertia. The core of the procedure relies on an inertia model conceived as the sum of a periodic component and a noise stochastic process distributed according a Logistic model. The robustness of a novel estimation procedure, able to capture the dynamic evolution of the inertia, is investigated by testing two scenarios of Italian Transmission Network. The assumptions in terms of the obtained numerical results show the validity of the estimation technique and of the probabilistic characterization of the noise.","PeriodicalId":6689,"journal":{"name":"2020 AEIT International Annual Conference (AEIT)","volume":"1 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82948179","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 : 2020-09-23DOI: 10.23919/AEIT50178.2020.9241183
A. Clerici, R. Chiumeo, C. Gandolfi
Medium Voltage Direct Current (MVDC) technology can be very helpful in meshing traditional AC distribution grids by means of multi-terminal DC links; this way, power flows among different feeders can be redistributed, as similar as transmission lines. Moreover, MVDC converters can easily interface renewable generators (e.g. photovoltaic farms) with AC, handling at the same time reverse power flows. This paper presents an overview of such technology, from initial concept and state-of-the-art to some innovative projects, including advanced protection schemes between MVDC links and existing distribution grid. The examples include active current limiter devices, hybrid circuit breakers and a communication layer for the coordination of these protection devices and power converters (logic selectivity), making MVDC a valuable support for AC grid improvement.
{"title":"MVDC multi-terminal grids: a valid support for distribution grids improvement","authors":"A. Clerici, R. Chiumeo, C. Gandolfi","doi":"10.23919/AEIT50178.2020.9241183","DOIUrl":"https://doi.org/10.23919/AEIT50178.2020.9241183","url":null,"abstract":"Medium Voltage Direct Current (MVDC) technology can be very helpful in meshing traditional AC distribution grids by means of multi-terminal DC links; this way, power flows among different feeders can be redistributed, as similar as transmission lines. Moreover, MVDC converters can easily interface renewable generators (e.g. photovoltaic farms) with AC, handling at the same time reverse power flows. This paper presents an overview of such technology, from initial concept and state-of-the-art to some innovative projects, including advanced protection schemes between MVDC links and existing distribution grid. The examples include active current limiter devices, hybrid circuit breakers and a communication layer for the coordination of these protection devices and power converters (logic selectivity), making MVDC a valuable support for AC grid improvement.","PeriodicalId":6689,"journal":{"name":"2020 AEIT International Annual Conference (AEIT)","volume":"30 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83711534","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 : 2020-09-23DOI: 10.23919/AEIT50178.2020.9241190
M. Ippolito, R. Musca, G. Zizzo, M. Bongiorno
The risk of oscillatory instability introduced by virtual synchronous machines (VSM) control in isolated power networks is investigated. The considered control is a common scheme widely studied in literature, in several configurations and for different case studies. The impact of the VSM control on the system stability is examined for the existing power network of a Mediterranean island. The VSM control is implemented within the power converters interfacing the energy storage systems (ESS) installed in the network. Simulations and analysis show the occurrence of oscillatory instability in the system, with the ESS-VSM and the synchronous machines of the network progressively swinging against each other. The reasons of the instability are identified as the lack of damping in the system and the adverse interaction between the VSM converter control and the synchronous machine dynamics. The possibility of extending the VSM control with a corrective action for the stabilization of the system is analyzed and discussed. A proper tuning procedure of the extended control is also provided.
{"title":"Extension and Tuning of Virtual Synchronous Machine to Avoid Oscillatory Instability in Isolated Power Networks","authors":"M. Ippolito, R. Musca, G. Zizzo, M. Bongiorno","doi":"10.23919/AEIT50178.2020.9241190","DOIUrl":"https://doi.org/10.23919/AEIT50178.2020.9241190","url":null,"abstract":"The risk of oscillatory instability introduced by virtual synchronous machines (VSM) control in isolated power networks is investigated. The considered control is a common scheme widely studied in literature, in several configurations and for different case studies. The impact of the VSM control on the system stability is examined for the existing power network of a Mediterranean island. The VSM control is implemented within the power converters interfacing the energy storage systems (ESS) installed in the network. Simulations and analysis show the occurrence of oscillatory instability in the system, with the ESS-VSM and the synchronous machines of the network progressively swinging against each other. The reasons of the instability are identified as the lack of damping in the system and the adverse interaction between the VSM converter control and the synchronous machine dynamics. The possibility of extending the VSM control with a corrective action for the stabilization of the system is analyzed and discussed. A proper tuning procedure of the extended control is also provided.","PeriodicalId":6689,"journal":{"name":"2020 AEIT International Annual Conference (AEIT)","volume":"38 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84802026","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 : 2020-09-23DOI: 10.23919/AEIT50178.2020.9241159
S. Massucco, G. Mosaico, M. Saviozzi, F. Silvestro, A. Fidigatti, E. Ragaini
Advanced Metering Infrastructure (AMI) is improving the quality and quantity of information within power systems. Thus, these data should be wisely used for efficient management and control. For these reasons, advanced functionalities have to be implemented in order to deal with the massive data stream. In this work, a stream clustering algorithm is used to model any load with a Markov Chain (MC). This algorithm is able to describe the typical load profile in real-time, thanks to a design and an implementation that minimizes the computational burden. The proposed procedure has been tested on an IEEE industrial machines dataset. In addition, a discussion on the parameter selection is provided.
{"title":"A Markov Chain Load Modeling Approach through a Stream Clustering Algorithm","authors":"S. Massucco, G. Mosaico, M. Saviozzi, F. Silvestro, A. Fidigatti, E. Ragaini","doi":"10.23919/AEIT50178.2020.9241159","DOIUrl":"https://doi.org/10.23919/AEIT50178.2020.9241159","url":null,"abstract":"Advanced Metering Infrastructure (AMI) is improving the quality and quantity of information within power systems. Thus, these data should be wisely used for efficient management and control. For these reasons, advanced functionalities have to be implemented in order to deal with the massive data stream. In this work, a stream clustering algorithm is used to model any load with a Markov Chain (MC). This algorithm is able to describe the typical load profile in real-time, thanks to a design and an implementation that minimizes the computational burden. The proposed procedure has been tested on an IEEE industrial machines dataset. In addition, a discussion on the parameter selection is provided.","PeriodicalId":6689,"journal":{"name":"2020 AEIT International Annual Conference (AEIT)","volume":"3 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82531621","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 : 2020-09-23DOI: 10.23919/AEIT50178.2020.9241145
R. Benato, G. Giannuzzi, M. Poli, F. Sanniti, R. Zaottini
This paper presents a model for the study of bottom-up power system restoration tests. The model is built for quick and suitable validation of power-frequency correlation during a restoration test, the most stressed process into a system with low regulation energy. All involved components are modelled by SISO systems describing both power generation controls and load behaviours. The simulation results are widely discussed through the analyses of four load scenarios, with the aim of scanning all possible worst cases in terms of load steps.
{"title":"A fully decoupled model for the study of power - frequency behaviour during a power system restoration test","authors":"R. Benato, G. Giannuzzi, M. Poli, F. Sanniti, R. Zaottini","doi":"10.23919/AEIT50178.2020.9241145","DOIUrl":"https://doi.org/10.23919/AEIT50178.2020.9241145","url":null,"abstract":"This paper presents a model for the study of bottom-up power system restoration tests. The model is built for quick and suitable validation of power-frequency correlation during a restoration test, the most stressed process into a system with low regulation energy. All involved components are modelled by SISO systems describing both power generation controls and load behaviours. The simulation results are widely discussed through the analyses of four load scenarios, with the aim of scanning all possible worst cases in terms of load steps.","PeriodicalId":6689,"journal":{"name":"2020 AEIT International Annual Conference (AEIT)","volume":"78 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76089019","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 : 2020-09-23DOI: 10.23919/AEIT50178.2020.9241124
A. L'Abbate, R. Chiumeo, C. Gandolfi, A. Clerici
The boosting progress of HVDC (High Voltage Direct Current) technology developed for transmission grid applications can be exploited for distribution network needs as well. This has made raise a growing interest on the development of MVDC (Medium Voltage Direct Current) technology. The present paper provides an overview of the ongoing developments related to HVDC (High Voltage Direct Current) and MVDC (Medium Voltage Direct Current) in Italy. Particular attention is paid to HVDC projects and to MVDC studies that have been conducted in the latest years in Italy.
{"title":"Overview of HVDC and MVDC developments and studies in Italy","authors":"A. L'Abbate, R. Chiumeo, C. Gandolfi, A. Clerici","doi":"10.23919/AEIT50178.2020.9241124","DOIUrl":"https://doi.org/10.23919/AEIT50178.2020.9241124","url":null,"abstract":"The boosting progress of HVDC (High Voltage Direct Current) technology developed for transmission grid applications can be exploited for distribution network needs as well. This has made raise a growing interest on the development of MVDC (Medium Voltage Direct Current) technology. The present paper provides an overview of the ongoing developments related to HVDC (High Voltage Direct Current) and MVDC (Medium Voltage Direct Current) in Italy. Particular attention is paid to HVDC projects and to MVDC studies that have been conducted in the latest years in Italy.","PeriodicalId":6689,"journal":{"name":"2020 AEIT International Annual Conference (AEIT)","volume":"180 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83006652","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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