Pub Date : 2020-12-16DOI: 10.1109/PEDES49360.2020.9379569
T. Dudi, R. Singhal, Rajesh Kumar, A. Al‐Sumaiti, T. Do
Flight safety and fuel consumption are major concerns of airline industry. En route civil aircraft may encounter hindrances such as bad weather patches, prohibited areas, and flight constraints. Robust path planning ensures maximum safety of the aircraft, crew members and passengers in unknown environment such as uncertain wind direction and drag from low pressure areas. This paper presents the robust path generation methodology near to the line of sight from starting aerodrome to the target aerodrome. This methodology confined the search space on the aerospace map to the nearby hindrance from the line of sight and then plan a robust path for the aircraft with the help of voronoi diagram. The voronoi diagram for the airspace map gives cells on the grid map, where each cell is equidistant from the hindrances. For these cells, the shortest robust path is evaluated using Dijkstra algorithm. The simulations for the shortest robust path on the airspace map were carried out for the proposed methodology and voronoi diagram for the full airspace map. The results obtained show that unnecessary clearances from the hindrances are avoided, and the computational time to evaluate the shortest robust path has been considerably reduced.
{"title":"Robust Shortest Path Planning for Aircraft using Bounded Region Voronoi Diagram","authors":"T. Dudi, R. Singhal, Rajesh Kumar, A. Al‐Sumaiti, T. Do","doi":"10.1109/PEDES49360.2020.9379569","DOIUrl":"https://doi.org/10.1109/PEDES49360.2020.9379569","url":null,"abstract":"Flight safety and fuel consumption are major concerns of airline industry. En route civil aircraft may encounter hindrances such as bad weather patches, prohibited areas, and flight constraints. Robust path planning ensures maximum safety of the aircraft, crew members and passengers in unknown environment such as uncertain wind direction and drag from low pressure areas. This paper presents the robust path generation methodology near to the line of sight from starting aerodrome to the target aerodrome. This methodology confined the search space on the aerospace map to the nearby hindrance from the line of sight and then plan a robust path for the aircraft with the help of voronoi diagram. The voronoi diagram for the airspace map gives cells on the grid map, where each cell is equidistant from the hindrances. For these cells, the shortest robust path is evaluated using Dijkstra algorithm. The simulations for the shortest robust path on the airspace map were carried out for the proposed methodology and voronoi diagram for the full airspace map. The results obtained show that unnecessary clearances from the hindrances are avoided, and the computational time to evaluate the shortest robust path has been considerably reduced.","PeriodicalId":124226,"journal":{"name":"2020 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133143100","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 : 2020-12-16DOI: 10.1109/PEDES49360.2020.9379422
Dipesh D. Atkar, P. Chaturvedi, H. Suryawanshi, P. Nachankar, Dharmendra Yadeo, Sai Krishna Saketi
In the existing electric power distribution network, a large number of AC/DC Micro-Grids are playing their role independently to provide the desired power supply to all the consumers. However, under short time outages, natural disasters, or sudden changes in system parameters, this AC/DC Micro-grid needs to interface with the existing power grid or with each other or to be disconnected from each other to help out for seamless power supply to all the consumers in the distribution network. Conventional, low-frequency transformer used in such network, is having so many drawbacks such as low power density, poor voltage regulation, and no control over power flow with poor power quality. Sold State Transformer (SST) is a viable solution for such applications. This paper presents a structure of SST for AC/DC Micro-Grid converter (MGC). A bidirectional boost converter and a stacked half -bridge inverter are integrated with the AC/DC Micro-Grid converter. The designed 6 KW Micro-Grid Converter has a bidirectional power flow controllability with a soft switching feature to improve the overall efficiency of the converter. The designed AC/DC MGC is simulated in PSIM/Simulink co-environment to verify it's performance indices under different operating conditions.
{"title":"Bidirectional Boost Converter based Solid State Transformer for AC/DC Micro-Grid Application","authors":"Dipesh D. Atkar, P. Chaturvedi, H. Suryawanshi, P. Nachankar, Dharmendra Yadeo, Sai Krishna Saketi","doi":"10.1109/PEDES49360.2020.9379422","DOIUrl":"https://doi.org/10.1109/PEDES49360.2020.9379422","url":null,"abstract":"In the existing electric power distribution network, a large number of AC/DC Micro-Grids are playing their role independently to provide the desired power supply to all the consumers. However, under short time outages, natural disasters, or sudden changes in system parameters, this AC/DC Micro-grid needs to interface with the existing power grid or with each other or to be disconnected from each other to help out for seamless power supply to all the consumers in the distribution network. Conventional, low-frequency transformer used in such network, is having so many drawbacks such as low power density, poor voltage regulation, and no control over power flow with poor power quality. Sold State Transformer (SST) is a viable solution for such applications. This paper presents a structure of SST for AC/DC Micro-Grid converter (MGC). A bidirectional boost converter and a stacked half -bridge inverter are integrated with the AC/DC Micro-Grid converter. The designed 6 KW Micro-Grid Converter has a bidirectional power flow controllability with a soft switching feature to improve the overall efficiency of the converter. The designed AC/DC MGC is simulated in PSIM/Simulink co-environment to verify it's performance indices under different operating conditions.","PeriodicalId":124226,"journal":{"name":"2020 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133183115","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 : 2020-12-16DOI: 10.1109/PEDES49360.2020.9379763
R. Kumar, Chandan Chetri, P. Devi, A. Dwivedi
This paper discusses the analysis of performance of a Dual Stator Dual Rotor Six-Phase I-Shaped Permanent Magnet Synchronous Motor (DSDRSPIS-PMSM) for the use of electric vehicles. This proposed motor has high performance and efficiency for the application of electric vehicles. The torque density of proposed motor is high due to the presence of dual stator in it. The two sets of 6-phase windings necessarily improve accuracy and greater potential for fault endurance of the proposed motor. The Finite Element Method (FEM) is chosen as an accurate analysis tool for the performance assessment of the proposed model. For the evaluation of results, along with magnetostatics, the transient type of analysis is also chosen. The proposed motor is analyzed to get the value of electromotive force, percentage of overall harmonic distortion, voltage-current characteristics, etc. From the aforementioned investigation, it can be inferred that, owing to magnetic-pole orientation the proposed motor is highly suitable.
{"title":"Design and Analysis of Dual Stator Dual Rotor Six-Phase I-Shaped Permanent Magnet Synchronous Motor for Electric Vehicles Application","authors":"R. Kumar, Chandan Chetri, P. Devi, A. Dwivedi","doi":"10.1109/PEDES49360.2020.9379763","DOIUrl":"https://doi.org/10.1109/PEDES49360.2020.9379763","url":null,"abstract":"This paper discusses the analysis of performance of a Dual Stator Dual Rotor Six-Phase I-Shaped Permanent Magnet Synchronous Motor (DSDRSPIS-PMSM) for the use of electric vehicles. This proposed motor has high performance and efficiency for the application of electric vehicles. The torque density of proposed motor is high due to the presence of dual stator in it. The two sets of 6-phase windings necessarily improve accuracy and greater potential for fault endurance of the proposed motor. The Finite Element Method (FEM) is chosen as an accurate analysis tool for the performance assessment of the proposed model. For the evaluation of results, along with magnetostatics, the transient type of analysis is also chosen. The proposed motor is analyzed to get the value of electromotive force, percentage of overall harmonic distortion, voltage-current characteristics, etc. From the aforementioned investigation, it can be inferred that, owing to magnetic-pole orientation the proposed motor is highly suitable.","PeriodicalId":124226,"journal":{"name":"2020 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127397846","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 : 2020-12-16DOI: 10.1109/PEDES49360.2020.9379839
Rahmat Khezri, A. Mahmoudi, M. H. Haque
This paper investigates a comparative study on optimal sizing of fuel cell (FC) and battery energy storage (BES) systems coupled with solar photovoltaic (PV) and wind turbine (WT) for a remote area power system. Two system configurations: (1) PV-WT-BES and (2) PV-WT-FC are optimally sized based on actual annual data of wind, solar radiation, ambient temperature and load profile of a remote area community in South Australia. The costs of generation and storage units are considered based on real Australian market prices. The levelized cost of electricity (LCOE) is used as the objective function and appropriate optimization constraints are considered for each system. It is found that the BES technology is more economic than FC system for power system design in Australian remote areas. However, the PV-WT-FC system results in lower dumped energy. Sensitivity analysis is conducted to investigate the effects of the FC system price and its efficiency on LCOE and dumped energy of the system. The option of adding reactor/reformer to the FC system to produce hydrogen from the human waste is also studied in terms of optimal capacities, economic and dumped energy.
{"title":"A Comparative Study of Optimal Battery Storage and Fuel Cell for a Clean Power System in Remote Area","authors":"Rahmat Khezri, A. Mahmoudi, M. H. Haque","doi":"10.1109/PEDES49360.2020.9379839","DOIUrl":"https://doi.org/10.1109/PEDES49360.2020.9379839","url":null,"abstract":"This paper investigates a comparative study on optimal sizing of fuel cell (FC) and battery energy storage (BES) systems coupled with solar photovoltaic (PV) and wind turbine (WT) for a remote area power system. Two system configurations: (1) PV-WT-BES and (2) PV-WT-FC are optimally sized based on actual annual data of wind, solar radiation, ambient temperature and load profile of a remote area community in South Australia. The costs of generation and storage units are considered based on real Australian market prices. The levelized cost of electricity (LCOE) is used as the objective function and appropriate optimization constraints are considered for each system. It is found that the BES technology is more economic than FC system for power system design in Australian remote areas. However, the PV-WT-FC system results in lower dumped energy. Sensitivity analysis is conducted to investigate the effects of the FC system price and its efficiency on LCOE and dumped energy of the system. The option of adding reactor/reformer to the FC system to produce hydrogen from the human waste is also studied in terms of optimal capacities, economic and dumped energy.","PeriodicalId":124226,"journal":{"name":"2020 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133767257","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 : 2020-12-16DOI: 10.1109/PEDES49360.2020.9379752
Deepak Kumar, A. Saxena
This paper presents a new three-port fourth-order two-switch boost converter that integrates renewable energy sources like photovoltaic (PV) panel with battery for managing varying load power demand irrespective of variation in the weather conditions. The converter operation is explained for various modes and a steady-state with time-domain analysis is carried out to evolve the high-gain feature of the converter. A small-signal multivariable dynamic model is mathematically derived to design the control loops using the relative gain array (RGA) approach. Simulation and experimental results are given for the 24/ 48 V, 50 W system.
{"title":"Three-Port Fourth-Order Boost Converter for Renewable Energy Application","authors":"Deepak Kumar, A. Saxena","doi":"10.1109/PEDES49360.2020.9379752","DOIUrl":"https://doi.org/10.1109/PEDES49360.2020.9379752","url":null,"abstract":"This paper presents a new three-port fourth-order two-switch boost converter that integrates renewable energy sources like photovoltaic (PV) panel with battery for managing varying load power demand irrespective of variation in the weather conditions. The converter operation is explained for various modes and a steady-state with time-domain analysis is carried out to evolve the high-gain feature of the converter. A small-signal multivariable dynamic model is mathematically derived to design the control loops using the relative gain array (RGA) approach. Simulation and experimental results are given for the 24/ 48 V, 50 W system.","PeriodicalId":124226,"journal":{"name":"2020 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115462818","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 : 2020-12-16DOI: 10.1109/PEDES49360.2020.9379740
V. Saini, Vishu Gupta, Rajesh Kumar, B. K. Panigrahi, M. A. Mahmud
Distributed energy storage systems (DESSs) have huge potential to balance distributed renewable power generation and load demands for consumers of prosumers. DESSs are capable to reduce barriers by eliminating intermittencies in distributed renewable energy sources in microgrids. Since the electricity prices are higher during the peak hours, DESSs can be used to store energy during residential off-peak (but solar peak) hours and utilized this energy during residential peak hours for reducing electricity bills of consumers or prosumers in microgrids. However, energy storage systems are still expensive components for residential microgrids and these need to be effectively utilized in order to provide a cost-effective solution. In continious analysis economic benifit also carried out. Maximum rate of return on investment, maximum profit margin, and annual revenue are includes in economic analysis. This paper present an alternative solution, a cloud energy storage system (CESS) for effectively utilizing DESSs in residential microgrids while reducing both electricity bills and installation costs for ESSs. This work presents an analysis on the feasibility and profit ability of CESSs.
{"title":"Cloud Energy Storage Systems for Consumers and Prosumers in Residential Microgrids","authors":"V. Saini, Vishu Gupta, Rajesh Kumar, B. K. Panigrahi, M. A. Mahmud","doi":"10.1109/PEDES49360.2020.9379740","DOIUrl":"https://doi.org/10.1109/PEDES49360.2020.9379740","url":null,"abstract":"Distributed energy storage systems (DESSs) have huge potential to balance distributed renewable power generation and load demands for consumers of prosumers. DESSs are capable to reduce barriers by eliminating intermittencies in distributed renewable energy sources in microgrids. Since the electricity prices are higher during the peak hours, DESSs can be used to store energy during residential off-peak (but solar peak) hours and utilized this energy during residential peak hours for reducing electricity bills of consumers or prosumers in microgrids. However, energy storage systems are still expensive components for residential microgrids and these need to be effectively utilized in order to provide a cost-effective solution. In continious analysis economic benifit also carried out. Maximum rate of return on investment, maximum profit margin, and annual revenue are includes in economic analysis. This paper present an alternative solution, a cloud energy storage system (CESS) for effectively utilizing DESSs in residential microgrids while reducing both electricity bills and installation costs for ESSs. This work presents an analysis on the feasibility and profit ability of CESSs.","PeriodicalId":124226,"journal":{"name":"2020 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115704705","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 : 2020-12-16DOI: 10.1109/PEDES49360.2020.9379375
N. Sandeep, A. Verma, Udaykumar R Y, H. Pota
This paper proposes a novel flying capacitor (FC) based inverter for a grid-connected photovoltaic (PV) system. It is possible to connect the grid neutral directly with the PV negative bus; thereby, the topology exhibits an inherent zero leakage current. The devised topological structure is such that it can be implemented using industry-standard half-bridge modules, making it an industry-ready solution. A simple unipolar pulsewidth modulation is applied with the aid of a simple logic gate based gating pulse generation scheme. Further, the capacitance value of the FC is low owing to the cyclic charging of FC in every switching period. The operating principle with the proposed modulation scheme is detailed, and simulation results validating the operability are presented. Finally, through a comprehensive comparative study, the key advantages of the proposed topology are highlighted.
{"title":"Six-Switch Inverter for Grid-Connected PV Application with Zero Leakage Current","authors":"N. Sandeep, A. Verma, Udaykumar R Y, H. Pota","doi":"10.1109/PEDES49360.2020.9379375","DOIUrl":"https://doi.org/10.1109/PEDES49360.2020.9379375","url":null,"abstract":"This paper proposes a novel flying capacitor (FC) based inverter for a grid-connected photovoltaic (PV) system. It is possible to connect the grid neutral directly with the PV negative bus; thereby, the topology exhibits an inherent zero leakage current. The devised topological structure is such that it can be implemented using industry-standard half-bridge modules, making it an industry-ready solution. A simple unipolar pulsewidth modulation is applied with the aid of a simple logic gate based gating pulse generation scheme. Further, the capacitance value of the FC is low owing to the cyclic charging of FC in every switching period. The operating principle with the proposed modulation scheme is detailed, and simulation results validating the operability are presented. Finally, through a comprehensive comparative study, the key advantages of the proposed topology are highlighted.","PeriodicalId":124226,"journal":{"name":"2020 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124287843","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 : 2020-12-16DOI: 10.1109/PEDES49360.2020.9379394
A. Al‐Sumaiti, K. Srikanth Reddy, Rajesh Kumar, Vishu Gupta
This paper investigates the impact and limitations of of temporal characteristics and event/frequency limits of responsive load models on the integration of demand response (DR) resources into power system scheduling aspects. The temporal characteristics of responsive loads are incorporated into the DR scheduling problem through dynamic cost models considering the availability and utilization factors. The impact of physical operating constraints of DR loads are modelled as temporal and event/frequency limit constraints. The temporal characteristics of responsive loads of various sectors namely, residential, commercial, industrial and municipal sectors are examined. The proposed methodology is incorporated into the UC and DR scheduling problem. The proposed dynamic cost models reported lower operating cost compared to both the system operation with no DR scheduling as well as the system operation with static cost models. In addition, the enforcement of physical operation limits on DR loads through temporal and event limit constraints reduced the DR schedule. Consequently, this consideration would result in increased operational cost and reduction of overall system reserve. The variation in the techno-economic aspects of the system with respect to the DR penetration level are included for discussions of the static as well as the dynamic cost models.
{"title":"Load Profile Aware Demand Response Based on Event and Temporal Limitations","authors":"A. Al‐Sumaiti, K. Srikanth Reddy, Rajesh Kumar, Vishu Gupta","doi":"10.1109/PEDES49360.2020.9379394","DOIUrl":"https://doi.org/10.1109/PEDES49360.2020.9379394","url":null,"abstract":"This paper investigates the impact and limitations of of temporal characteristics and event/frequency limits of responsive load models on the integration of demand response (DR) resources into power system scheduling aspects. The temporal characteristics of responsive loads are incorporated into the DR scheduling problem through dynamic cost models considering the availability and utilization factors. The impact of physical operating constraints of DR loads are modelled as temporal and event/frequency limit constraints. The temporal characteristics of responsive loads of various sectors namely, residential, commercial, industrial and municipal sectors are examined. The proposed methodology is incorporated into the UC and DR scheduling problem. The proposed dynamic cost models reported lower operating cost compared to both the system operation with no DR scheduling as well as the system operation with static cost models. In addition, the enforcement of physical operation limits on DR loads through temporal and event limit constraints reduced the DR schedule. Consequently, this consideration would result in increased operational cost and reduction of overall system reserve. The variation in the techno-economic aspects of the system with respect to the DR penetration level are included for discussions of the static as well as the dynamic cost models.","PeriodicalId":124226,"journal":{"name":"2020 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124432557","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 : 2020-12-16DOI: 10.1109/PEDES49360.2020.9379810
P. Nachankar, H. Suryawanshi, P. Chaturvedi, Dipesh D. Atkar, Ch. L. Narayana, D. Govind
Amidst growing environmental and energy concerns, electric vehicles (EVs) are potential solution for reducing carbon emission. All-electric green energy objectives heavily rely on standardization of electric vehicle service equipment (EVSE), associated protocols, smart chargers and battery technology. However, no generic approach for EVSE for charging different categories of electric vehicle exists. Therefore, in this paper, an off-board unidirectional conductive type DC fast charger for light and heavy electric vehicles is presented. The converter is adaptable for charging of light as well as heavy electric vehicles. The proposed charger is based on resonant series converter with adaptable restructured multiplier rectifier. The restructuring element for adaptable rectifier is a simple bi-directional switch. The doubler configuration is recommended for light electric vehicles (400V Class) while quadrupler configuration is recommended for heavy electric vehicles (800V Class). In this paper, both the configurations and their associated operation modes are explained with respective waveforms. Further, all semiconductor switches and rectifier diodes are naturally soft switched owing to resonant converter above resonant frequency operation for minimizing losses. The charging rates and power levels can be scaled up or down by adopting modular approach. To validate the presented theoretical analysis, a 1.25 kW hardware prototype is designed and tested in the laboratory and experimental results are presented.
{"title":"Universal Off-board Battery Charger for Light and Heavy Electric Vehicles","authors":"P. Nachankar, H. Suryawanshi, P. Chaturvedi, Dipesh D. Atkar, Ch. L. Narayana, D. Govind","doi":"10.1109/PEDES49360.2020.9379810","DOIUrl":"https://doi.org/10.1109/PEDES49360.2020.9379810","url":null,"abstract":"Amidst growing environmental and energy concerns, electric vehicles (EVs) are potential solution for reducing carbon emission. All-electric green energy objectives heavily rely on standardization of electric vehicle service equipment (EVSE), associated protocols, smart chargers and battery technology. However, no generic approach for EVSE for charging different categories of electric vehicle exists. Therefore, in this paper, an off-board unidirectional conductive type DC fast charger for light and heavy electric vehicles is presented. The converter is adaptable for charging of light as well as heavy electric vehicles. The proposed charger is based on resonant series converter with adaptable restructured multiplier rectifier. The restructuring element for adaptable rectifier is a simple bi-directional switch. The doubler configuration is recommended for light electric vehicles (400V Class) while quadrupler configuration is recommended for heavy electric vehicles (800V Class). In this paper, both the configurations and their associated operation modes are explained with respective waveforms. Further, all semiconductor switches and rectifier diodes are naturally soft switched owing to resonant converter above resonant frequency operation for minimizing losses. The charging rates and power levels can be scaled up or down by adopting modular approach. To validate the presented theoretical analysis, a 1.25 kW hardware prototype is designed and tested in the laboratory and experimental results are presented.","PeriodicalId":124226,"journal":{"name":"2020 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114427992","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 : 2020-12-16DOI: 10.1109/PEDES49360.2020.9379761
Dwijasish Das, Chandan Kumar
This paper proposes a partial start-up procedure for a smart transformer (ST) to changeover from low voltage (LV) side islanded operation to grid connected mode. In the islanded operation of ST LV side, the ST LV converter is operational but the other two converters of the ST namely the ST medium voltage (MV) converter and ST isolated dc-dc converter are shut down. For the reconnection to the MV grid, these converters have to be switched on to enable power flow. Thus while one portion of the ST is already operational, the non-operational parts have to be started without affecting or interrupting the operation of the LV grid. This calls for a proper stage by stage start-up procedure to ensure that the converters become operational maintaining the staring inrush currents within rated limits of the converters. A reverse start up scheme is proposed where the ST MVdc bus is charged by drawing power from the battery energy storage system connected to the LVdc bus. Subsequently the ST MV converter is started to connect the LV side to the MV grid. Simulation results are incorporated which verify the proposed start-up scheme.
{"title":"Partial Start-up Scheme for ST to Reconnect to MV Grid from LV Side Islanded Operation","authors":"Dwijasish Das, Chandan Kumar","doi":"10.1109/PEDES49360.2020.9379761","DOIUrl":"https://doi.org/10.1109/PEDES49360.2020.9379761","url":null,"abstract":"This paper proposes a partial start-up procedure for a smart transformer (ST) to changeover from low voltage (LV) side islanded operation to grid connected mode. In the islanded operation of ST LV side, the ST LV converter is operational but the other two converters of the ST namely the ST medium voltage (MV) converter and ST isolated dc-dc converter are shut down. For the reconnection to the MV grid, these converters have to be switched on to enable power flow. Thus while one portion of the ST is already operational, the non-operational parts have to be started without affecting or interrupting the operation of the LV grid. This calls for a proper stage by stage start-up procedure to ensure that the converters become operational maintaining the staring inrush currents within rated limits of the converters. A reverse start up scheme is proposed where the ST MVdc bus is charged by drawing power from the battery energy storage system connected to the LVdc bus. Subsequently the ST MV converter is started to connect the LV side to the MV grid. Simulation results are incorporated which verify the proposed start-up scheme.","PeriodicalId":124226,"journal":{"name":"2020 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114851813","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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