Pub Date : 2019-09-01DOI: 10.1109/SEST.2019.8849034
K. Fukushima, T. Nayuki, H. Hatta, Hiromu Kobayashi
This paper proposes a novel voltage regulation method with reactive power control by power conditioning subsystem (PCS) coordination. The proposed scheme is an autonomous voltage regulation method aimed at residential customers in the low-voltage distribution group. This scheme divides the reactive power within the group by sharing the self-information of each PCS. Operational verification of the proposed method is achieved via experiments. Furthermore, the reactive power reduction effect of the proposed method is clarified by computer-simulated estimations. As a result, the average reactive power value of the proposed method is reduced by 70% compared to the constant power factor (0.95) method in a sunny day condition.
{"title":"Voltage Regulation in Low-Voltage Distribution Grids with Reactive Power Control by Power Conditioning Subsystem Coordination","authors":"K. Fukushima, T. Nayuki, H. Hatta, Hiromu Kobayashi","doi":"10.1109/SEST.2019.8849034","DOIUrl":"https://doi.org/10.1109/SEST.2019.8849034","url":null,"abstract":"This paper proposes a novel voltage regulation method with reactive power control by power conditioning subsystem (PCS) coordination. The proposed scheme is an autonomous voltage regulation method aimed at residential customers in the low-voltage distribution group. This scheme divides the reactive power within the group by sharing the self-information of each PCS. Operational verification of the proposed method is achieved via experiments. Furthermore, the reactive power reduction effect of the proposed method is clarified by computer-simulated estimations. As a result, the average reactive power value of the proposed method is reduced by 70% compared to the constant power factor (0.95) method in a sunny day condition.","PeriodicalId":158839,"journal":{"name":"2019 International Conference on Smart Energy Systems and Technologies (SEST)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130992734","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 : 2019-09-01DOI: 10.1109/SEST.2019.8849056
João Lucas de Souza Silva, H. S. Moreira, D. B. de Mesquita, M. M. Cavalcante, M. G. Villalva
Solutions that increase efficiency in renewable energy are important for environmental sustainability. In this way, dealing with photovoltaic generation a new architecture constituted by power optimizer for photovoltaic systems emerges. Power optimizer is a DC/DC converter, allocated to each one or two photovoltaic modules, that tries to reduce losses in photovoltaic systems, increasing the photovoltaic power generation. Thus, this paper presents the architecture used in a photovoltaic system with power optimizer and a performance simulation for application in a residence and a photovoltaic plant. Thus, it is possible to measure the gain provided by power optimizer in simulated systems. As a result, the application of the photovoltaic system in residence provided better performance than the application in the photovoltaic plant, due to the greater frequency of shading in the photovoltaic modules. Therefore, power optimizer for photovoltaic systems is a solution that can be considered, mainly with the reduction of the cost of power electronics in the future.
{"title":"Modular Architecture with Power Optimizers for Photovoltaic Systems","authors":"João Lucas de Souza Silva, H. S. Moreira, D. B. de Mesquita, M. M. Cavalcante, M. G. Villalva","doi":"10.1109/SEST.2019.8849056","DOIUrl":"https://doi.org/10.1109/SEST.2019.8849056","url":null,"abstract":"Solutions that increase efficiency in renewable energy are important for environmental sustainability. In this way, dealing with photovoltaic generation a new architecture constituted by power optimizer for photovoltaic systems emerges. Power optimizer is a DC/DC converter, allocated to each one or two photovoltaic modules, that tries to reduce losses in photovoltaic systems, increasing the photovoltaic power generation. Thus, this paper presents the architecture used in a photovoltaic system with power optimizer and a performance simulation for application in a residence and a photovoltaic plant. Thus, it is possible to measure the gain provided by power optimizer in simulated systems. As a result, the application of the photovoltaic system in residence provided better performance than the application in the photovoltaic plant, due to the greater frequency of shading in the photovoltaic modules. Therefore, power optimizer for photovoltaic systems is a solution that can be considered, mainly with the reduction of the cost of power electronics in the future.","PeriodicalId":158839,"journal":{"name":"2019 International Conference on Smart Energy Systems and Technologies (SEST)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132683693","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 : 2019-09-01DOI: 10.1109/SEST.2019.8849032
Bahram Pournazarian, E. Pouresmaeil, Meysam Saeedian, M. Lehtonen, Ricky Chan, S. Taheri
The distributed generations (DG) are linked to microgrids (MGs) by power converters regularly and the MG will be in mutual interconnection with conventional power systems. The more the participation level of the converter-based DGs in the MG, the more the stability issues are seen in the MG. Unlike conventional synchronous generators (SGs) which have considerable inertia, the converter-based DG units lack this intrinsic inertia; therefore, they potentially make the MG prone to stability issues. The idea to emulate the behavior of SGs in the control loop of interfaced converters to maintain the MGs stability is a newly-growing idea. This paper tends to propose an improved voltage and frequency control strategy for island MGs consisting several converter-based DGs. The proposed control structure uses an advanced Virtual Synchronous Generator (VSG) model and aimed at implementing the primary frequency and voltage control of MGs. The designed model considers both resistive and inductive parameters of lines in MGs. Since the suggested control structure is a local one, doesn't require communication links between DG units. The simulation results verify the potency of the recommended control structure to preserve the frequency and voltage stability of an island MG even in severe events.
{"title":"Microgrid Frequency & Voltage Adjustment Applying Virtual Synchronous Generator","authors":"Bahram Pournazarian, E. Pouresmaeil, Meysam Saeedian, M. Lehtonen, Ricky Chan, S. Taheri","doi":"10.1109/SEST.2019.8849032","DOIUrl":"https://doi.org/10.1109/SEST.2019.8849032","url":null,"abstract":"The distributed generations (DG) are linked to microgrids (MGs) by power converters regularly and the MG will be in mutual interconnection with conventional power systems. The more the participation level of the converter-based DGs in the MG, the more the stability issues are seen in the MG. Unlike conventional synchronous generators (SGs) which have considerable inertia, the converter-based DG units lack this intrinsic inertia; therefore, they potentially make the MG prone to stability issues. The idea to emulate the behavior of SGs in the control loop of interfaced converters to maintain the MGs stability is a newly-growing idea. This paper tends to propose an improved voltage and frequency control strategy for island MGs consisting several converter-based DGs. The proposed control structure uses an advanced Virtual Synchronous Generator (VSG) model and aimed at implementing the primary frequency and voltage control of MGs. The designed model considers both resistive and inductive parameters of lines in MGs. Since the suggested control structure is a local one, doesn't require communication links between DG units. The simulation results verify the potency of the recommended control structure to preserve the frequency and voltage stability of an island MG even in severe events.","PeriodicalId":158839,"journal":{"name":"2019 International Conference on Smart Energy Systems and Technologies (SEST)","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117233011","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 : 2019-09-01DOI: 10.1109/SEST.2019.8849135
Stanislav Hes, J. Kula, J. Svec
The paper presents a methodology how to quantify a technical and economic impact of selected smart solutions on hosting capacity increase of Distribution Energy Resources (DERs) and electric vehicles (EVs) on low voltage (LV) and medium voltage (MV) level in a large distribution area in the future. The official Czech government documents called National Action Plan for Smart Grids (NAP SG) and Clean Mobility (NAP CM) published by Czech Ministry of Industry and Trade present several scenarios of future expected development of DERs and EVs. Comparison of business as usual and smart grid solutions is presented and monetized.
{"title":"Analysis of Smart Technical Measures Impacts on DER and EV Hosting Capacity Increase in LV and MV Grids in the Czech Republic in Terms of European Project InterFlex","authors":"Stanislav Hes, J. Kula, J. Svec","doi":"10.1109/SEST.2019.8849135","DOIUrl":"https://doi.org/10.1109/SEST.2019.8849135","url":null,"abstract":"The paper presents a methodology how to quantify a technical and economic impact of selected smart solutions on hosting capacity increase of Distribution Energy Resources (DERs) and electric vehicles (EVs) on low voltage (LV) and medium voltage (MV) level in a large distribution area in the future. The official Czech government documents called National Action Plan for Smart Grids (NAP SG) and Clean Mobility (NAP CM) published by Czech Ministry of Industry and Trade present several scenarios of future expected development of DERs and EVs. Comparison of business as usual and smart grid solutions is presented and monetized.","PeriodicalId":158839,"journal":{"name":"2019 International Conference on Smart Energy Systems and Technologies (SEST)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130105928","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 : 2019-09-01DOI: 10.1109/SEST.2019.8849137
Shaghayegh Zalzar, E. Bompard
The ever-increasing integration of variable renewable energy sources in the European power systems has brought new challenges to the system operation. The uncontrollability and uncertainty of power production by these resources increases the need for flexibility in power systems to balance supply and demand continuously, while eliminating the curtailment of renewable energy in hours with excess renewable generation. Market integration acts as a solution to increase operational flexibility and facilitate the integration of variable renewable energy sources into the European power system. However, the limited power transfer capacity of the interconnections narrows the potential of market integration to provide adequate flexibility. The required flexibility can also be provided by active participation of demand-side resources in the electricity markets through demand response programs. Therefore, the European Union has already required the member states to remove the barriers of active participation of demand side resources such as demand response programs, alongside supply in wholesale and retail markets. In this regard, this study investigates the impact of different levels of demand-side flexibility in European countries on the market performance of a Europe-wide day-ahead electricity market with reference to five European test cases: Portugal, Sweden, Belgium, the Netherlands, and Denmark. A Europe-wide market scenario for 2030 is generated which models 34 European countries with stochastic scenarios for wind/solar generation and the electricity demand. Day-ahead market performance under different levels of demand-side flexibility is compared in terms of average market prices, generators' profit and cost to loads during 2030.
{"title":"Assessing the Impacts of Demand-Side Flexibility on the Performance of the Europe-Wide Integrated Day-Ahead Electricity Market","authors":"Shaghayegh Zalzar, E. Bompard","doi":"10.1109/SEST.2019.8849137","DOIUrl":"https://doi.org/10.1109/SEST.2019.8849137","url":null,"abstract":"The ever-increasing integration of variable renewable energy sources in the European power systems has brought new challenges to the system operation. The uncontrollability and uncertainty of power production by these resources increases the need for flexibility in power systems to balance supply and demand continuously, while eliminating the curtailment of renewable energy in hours with excess renewable generation. Market integration acts as a solution to increase operational flexibility and facilitate the integration of variable renewable energy sources into the European power system. However, the limited power transfer capacity of the interconnections narrows the potential of market integration to provide adequate flexibility. The required flexibility can also be provided by active participation of demand-side resources in the electricity markets through demand response programs. Therefore, the European Union has already required the member states to remove the barriers of active participation of demand side resources such as demand response programs, alongside supply in wholesale and retail markets. In this regard, this study investigates the impact of different levels of demand-side flexibility in European countries on the market performance of a Europe-wide day-ahead electricity market with reference to five European test cases: Portugal, Sweden, Belgium, the Netherlands, and Denmark. A Europe-wide market scenario for 2030 is generated which models 34 European countries with stochastic scenarios for wind/solar generation and the electricity demand. Day-ahead market performance under different levels of demand-side flexibility is compared in terms of average market prices, generators' profit and cost to loads during 2030.","PeriodicalId":158839,"journal":{"name":"2019 International Conference on Smart Energy Systems and Technologies (SEST)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122361446","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 : 2019-09-01DOI: 10.1109/SEST.2019.8849031
Michelle Kitayama da Silva, K. B. de Melo, T. Costa, Dante Inga Narvez, Daniel de Bastos Mesquita, M. G. Villalva
The increasing energy demand and the search for greener energy resources are expanding interests on photovoltaic systems. These systems need an accurate climatic and irradiation data in order to precisely estimate the energy yield of PV systems. However, most of the available irradiance data, are only for the horizontal plane. The precise estimation of the total irradiance incident on the surface of photovoltaic modules is one of the most important steps in the performance analysis of PV systems. In order to estimate the irradiance on a tilted surface from the irradiance data on the horizontal plane, there are many models available in the literature, they can be classified in isotropic and anisotropic models. This study aims to access the performance of an isotropic and three anisotropic models, which are used by PV system simulation softwares, and the impact of each of them on the estimated energy generation. The results are compared with measured energy data collected at Politec®, Araçariguama in Brazil. Results showed that positioning the module at the correct tilted angle and facing north can optimise the global irradiance incident on the module's surface. Hay & Davies model presented the lowest Mean Bias Error and Root Mean Squared Error while also showing a correlation coefficient close to 1.
{"title":"Comparative Study of Sky Diffuse Irradiance Models Applied to Photovoltaic Systems","authors":"Michelle Kitayama da Silva, K. B. de Melo, T. Costa, Dante Inga Narvez, Daniel de Bastos Mesquita, M. G. Villalva","doi":"10.1109/SEST.2019.8849031","DOIUrl":"https://doi.org/10.1109/SEST.2019.8849031","url":null,"abstract":"The increasing energy demand and the search for greener energy resources are expanding interests on photovoltaic systems. These systems need an accurate climatic and irradiation data in order to precisely estimate the energy yield of PV systems. However, most of the available irradiance data, are only for the horizontal plane. The precise estimation of the total irradiance incident on the surface of photovoltaic modules is one of the most important steps in the performance analysis of PV systems. In order to estimate the irradiance on a tilted surface from the irradiance data on the horizontal plane, there are many models available in the literature, they can be classified in isotropic and anisotropic models. This study aims to access the performance of an isotropic and three anisotropic models, which are used by PV system simulation softwares, and the impact of each of them on the estimated energy generation. The results are compared with measured energy data collected at Politec®, Araçariguama in Brazil. Results showed that positioning the module at the correct tilted angle and facing north can optimise the global irradiance incident on the module's surface. Hay & Davies model presented the lowest Mean Bias Error and Root Mean Squared Error while also showing a correlation coefficient close to 1.","PeriodicalId":158839,"journal":{"name":"2019 International Conference on Smart Energy Systems and Technologies (SEST)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130416670","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 : 2019-09-01DOI: 10.1109/SEST.2019.8849138
Heidi Marguš, Matej Žnidarec, D. Šljivac, M. Stojkov
Nearly zero energy buildings (nZEB) are buildings with high energy performance and nearly zero or very small amount of required energy. Energy production of an nZEB is based on only renewable energy sources (RES), on-site or nearby. Nearly zero energy standard represent the solution for better energy efficiency, conservation and saving. In this work, proposal of upgrade of the existing production system with goal of achieving the nearly zero energy standard of the Faculty of Electrical Engineering, Computer Science and Information Technology (FERIT) building in Osijek, Croatia is given. Measurement database developed in Laboratory for Renewable Energy Sources consists of measurements of meteorological data recorded at the micro-location of FERIT building, electrical output of the 10 kWp photovoltaic (PV) system and total electricity consumption of the FERIT Osijek building. Simulations for four different structures of microgrid (MG) are conducted and performance analysis based on results is obtained. Main goal of the proposed MG is to achieve nearly zero energy standard based on cost-benefit analysis of different proposed cases. In the final part of paper, comparison of results with conclusions are presented.
{"title":"Performance analysis of upgraded university building of FERIT Osijek microgrid achieving nearly zero energy standard based on real measurement data","authors":"Heidi Marguš, Matej Žnidarec, D. Šljivac, M. Stojkov","doi":"10.1109/SEST.2019.8849138","DOIUrl":"https://doi.org/10.1109/SEST.2019.8849138","url":null,"abstract":"Nearly zero energy buildings (nZEB) are buildings with high energy performance and nearly zero or very small amount of required energy. Energy production of an nZEB is based on only renewable energy sources (RES), on-site or nearby. Nearly zero energy standard represent the solution for better energy efficiency, conservation and saving. In this work, proposal of upgrade of the existing production system with goal of achieving the nearly zero energy standard of the Faculty of Electrical Engineering, Computer Science and Information Technology (FERIT) building in Osijek, Croatia is given. Measurement database developed in Laboratory for Renewable Energy Sources consists of measurements of meteorological data recorded at the micro-location of FERIT building, electrical output of the 10 kWp photovoltaic (PV) system and total electricity consumption of the FERIT Osijek building. Simulations for four different structures of microgrid (MG) are conducted and performance analysis based on results is obtained. Main goal of the proposed MG is to achieve nearly zero energy standard based on cost-benefit analysis of different proposed cases. In the final part of paper, comparison of results with conclusions are presented.","PeriodicalId":158839,"journal":{"name":"2019 International Conference on Smart Energy Systems and Technologies (SEST)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126762197","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 : 2019-09-01DOI: 10.1109/SEST.2019.8849145
H. S. Moreira, João Lucas de S. Silva, Guilherme C. S. Prym, E. Y. Sakô, M. V. G. dos Reis, M. G. Villalva
The use of solar energy for electricity grows mainly due to environmental issues. However, several challenges arise for researchers, such as improving the efficiency of photovoltaic systems in shading situations. In this opportunity, several algorithms attempt to search for the point of maximum power in a photovoltaic system, among them the artificial intelligence algorithms. Thus, this paper investigates the use of artificial intelligence in maximum power tracking techniques for partially shaded systems. A review of different methods is done and performed simulations. As a highlight, the particle swarm optimization was the fastest algorithm and the most accurate was artificial bee colony. Therefore, the tested algorithms obtained good efficiency, being the role of the designer to choose the most suitable for each system.
{"title":"Comparison of Swarm Optimization Methods for MPPT in Partially Shaded Photovoltaic Systems","authors":"H. S. Moreira, João Lucas de S. Silva, Guilherme C. S. Prym, E. Y. Sakô, M. V. G. dos Reis, M. G. Villalva","doi":"10.1109/SEST.2019.8849145","DOIUrl":"https://doi.org/10.1109/SEST.2019.8849145","url":null,"abstract":"The use of solar energy for electricity grows mainly due to environmental issues. However, several challenges arise for researchers, such as improving the efficiency of photovoltaic systems in shading situations. In this opportunity, several algorithms attempt to search for the point of maximum power in a photovoltaic system, among them the artificial intelligence algorithms. Thus, this paper investigates the use of artificial intelligence in maximum power tracking techniques for partially shaded systems. A review of different methods is done and performed simulations. As a highlight, the particle swarm optimization was the fastest algorithm and the most accurate was artificial bee colony. Therefore, the tested algorithms obtained good efficiency, being the role of the designer to choose the most suitable for each system.","PeriodicalId":158839,"journal":{"name":"2019 International Conference on Smart Energy Systems and Technologies (SEST)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125014532","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 : 2019-09-01DOI: 10.1109/SEST.2019.8849115
E. Sosnina, A. Chivenkov, V. Sevastyanov, A. Shalukho, I. Lipuzhin
The power flow control device (PFCD) has been developed to control the medium voltage (MV) networks. The advantage of the proposed MV PFCD is the ability to control the power flow in the transmission line without taking into account the parameters of the line and the network operation mode. The main elements of the MV PFCD are two power converters: an active rectifier and an autonomous inverter. The principle of power regulation of the MV PFCD is a vector voltage drop regulation across the additional reactive element introduced into the power line. The article is devoted to the development and research of a vector control system of the MV PFCD. Taking into account the peculiarities of the MV PFCD functioning, the structure of the control system of MV PFCD power converters has been proposed to be a closed-loop with negative feedback loops. The MATLAB model of 0.4 kV power network with the MV PFCD has been developed to test the proposed MV PFCD control system. The external characteristics of MV PFCD converters confirm that control system is able to provide an accurate execution of control commands. The response of the MV PFCD control system during the load rejection and load rise has been investigated. It has been established that the developed control system fully implements MV PFCD declared functions.
{"title":"Development of Control System for New Medium Voltage Power Flow Control Device","authors":"E. Sosnina, A. Chivenkov, V. Sevastyanov, A. Shalukho, I. Lipuzhin","doi":"10.1109/SEST.2019.8849115","DOIUrl":"https://doi.org/10.1109/SEST.2019.8849115","url":null,"abstract":"The power flow control device (PFCD) has been developed to control the medium voltage (MV) networks. The advantage of the proposed MV PFCD is the ability to control the power flow in the transmission line without taking into account the parameters of the line and the network operation mode. The main elements of the MV PFCD are two power converters: an active rectifier and an autonomous inverter. The principle of power regulation of the MV PFCD is a vector voltage drop regulation across the additional reactive element introduced into the power line. The article is devoted to the development and research of a vector control system of the MV PFCD. Taking into account the peculiarities of the MV PFCD functioning, the structure of the control system of MV PFCD power converters has been proposed to be a closed-loop with negative feedback loops. The MATLAB model of 0.4 kV power network with the MV PFCD has been developed to test the proposed MV PFCD control system. The external characteristics of MV PFCD converters confirm that control system is able to provide an accurate execution of control commands. The response of the MV PFCD control system during the load rejection and load rise has been investigated. It has been established that the developed control system fully implements MV PFCD declared functions.","PeriodicalId":158839,"journal":{"name":"2019 International Conference on Smart Energy Systems and Technologies (SEST)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125209430","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 : 2019-09-01DOI: 10.1109/SEST.2019.8849040
Paulo Mendonça, D. Sousa
During the last couple of decades the Tram systems have been reappearing and reused in many cities all over the world. The new advent of tram lines cannot be separated from the electric mobility policies and the new technological developments. Among other features, trams that can ride on light rail infrastructures, as well as, heavy rail infrastructures have been adopted in many European cities. A core challenge when developing this type of solutions is to make compatible infrastructures running at different frequencies and voltage levels, as for instance, to develop trams able to operate at standard voltages (in line with EN50163/IEC60850), as for instance, 750 VDC in an urban area or 15 kV 162/3Hz in rail lines. Considering standard voltage levels for heavy and light rail operation, the main purpose of this paper is to describe an adaptive converter based on modular stages. This converter also includes intermediate energy storage (batteries and ultracapacitors) and is designed considering a system with 6 traction motors. To analyze the behavior and viability of the proposed converter, a simulation model of the entire system is developed based on models in line with the dynamics of such electrical systems. The results obtained show that is possible to operate a tram under different feeding conditions based on a modular solution.
{"title":"Adaptive Converter for Light Rail Traction Systems","authors":"Paulo Mendonça, D. Sousa","doi":"10.1109/SEST.2019.8849040","DOIUrl":"https://doi.org/10.1109/SEST.2019.8849040","url":null,"abstract":"During the last couple of decades the Tram systems have been reappearing and reused in many cities all over the world. The new advent of tram lines cannot be separated from the electric mobility policies and the new technological developments. Among other features, trams that can ride on light rail infrastructures, as well as, heavy rail infrastructures have been adopted in many European cities. A core challenge when developing this type of solutions is to make compatible infrastructures running at different frequencies and voltage levels, as for instance, to develop trams able to operate at standard voltages (in line with EN50163/IEC60850), as for instance, 750 VDC in an urban area or 15 kV 162/3Hz in rail lines. Considering standard voltage levels for heavy and light rail operation, the main purpose of this paper is to describe an adaptive converter based on modular stages. This converter also includes intermediate energy storage (batteries and ultracapacitors) and is designed considering a system with 6 traction motors. To analyze the behavior and viability of the proposed converter, a simulation model of the entire system is developed based on models in line with the dynamics of such electrical systems. The results obtained show that is possible to operate a tram under different feeding conditions based on a modular solution.","PeriodicalId":158839,"journal":{"name":"2019 International Conference on Smart Energy Systems and Technologies (SEST)","volume":"4057 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127555205","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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