Pub Date : 2021-12-06DOI: 10.1109/SPEC52827.2021.9709311
Jean D'amour Ni̇yonsaba, Jean De Dieu Samvura, Jean Marie V. Bikorimana
Many countries including Rwanda are actively encouraging investment in the e-mobility sector by converting the Internal Combustion Engine (ICE) motorcycles to Electric-motorcycles to reduce CO2 emission. However, the charging cost is high due to the use of electricity from the grid and lack of common standard voltage level to facilitate the battery recharging and swapping. This paper aims to make a comparison between the charging cost from the national grid and from charging station based on a PV system towards integration of solar PV based charging station. Furthermore, this paper presents the optimal PV sizing and design for cost effective of the E-motorcycle charging station based on a PV system. The results demonstrate that after integrating a solar PV system with a grid-connected charging station, the swapping cost is lowered from ${$}$ 1 to 0.2212 US dollars. This new option helps in the transition from internal combustion engine (ICE) motorcycles, which emit greenhouse gases and have high gasoline costs, to electric motorcycles, which are more environmentally friendly and have lower fuel costs, as is the goal of our country and Africa.
{"title":"Integration of Electric Motorcycle Charging Station Based on PV System in Kigali City","authors":"Jean D'amour Ni̇yonsaba, Jean De Dieu Samvura, Jean Marie V. Bikorimana","doi":"10.1109/SPEC52827.2021.9709311","DOIUrl":"https://doi.org/10.1109/SPEC52827.2021.9709311","url":null,"abstract":"Many countries including Rwanda are actively encouraging investment in the e-mobility sector by converting the Internal Combustion Engine (ICE) motorcycles to Electric-motorcycles to reduce CO2 emission. However, the charging cost is high due to the use of electricity from the grid and lack of common standard voltage level to facilitate the battery recharging and swapping. This paper aims to make a comparison between the charging cost from the national grid and from charging station based on a PV system towards integration of solar PV based charging station. Furthermore, this paper presents the optimal PV sizing and design for cost effective of the E-motorcycle charging station based on a PV system. The results demonstrate that after integrating a solar PV system with a grid-connected charging station, the swapping cost is lowered from ${$}$ 1 to 0.2212 US dollars. This new option helps in the transition from internal combustion engine (ICE) motorcycles, which emit greenhouse gases and have high gasoline costs, to electric motorcycles, which are more environmentally friendly and have lower fuel costs, as is the goal of our country and Africa.","PeriodicalId":236251,"journal":{"name":"2021 IEEE Southern Power Electronics Conference (SPEC)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124808820","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 : 2021-12-06DOI: 10.1109/SPEC52827.2021.9709489
Fang Liu, Haodong Wang, Zi Wu, Hao Li, Yang Zhao, Chunyang Ling
The DC microgrid with photovoltaic and energy storage system has become a prevailing trend for new energy. However, the whole system involves a variety of power electronic converter interactions, so it is necessary to conduct system stability analysis. Firstly, the topology and control strategies of the DC microgrid with photovoltaic and energy storage system are introduced, including photovoltaic power generation system and its control, energy storage system and its control, and grid and grid-side converter topology and its control. Secondly, the impedance or admittance of these three units are modeled separately. Next, each unit is equivalent into the corresponding voltage source system or current source system, and the impedance proportion of the DC microgrid with photovoltaic and energy storage system is obtained. Then based on the Nyquist stability criterion, the obtained impedance proportion is used to analyze the impacts of the proportional parameters of the voltage loop of the grid-side converter, the control parameters of the current loop of the energy storage system, as well as the capacity of the energy storage system and the charging and discharging states of the energy storage on the stability of the DC microgrid with photovoltaic and energy storage system.
{"title":"Modeling and Stability Analysis of DC Microgrid with Photovoltaic and Energy Storage System","authors":"Fang Liu, Haodong Wang, Zi Wu, Hao Li, Yang Zhao, Chunyang Ling","doi":"10.1109/SPEC52827.2021.9709489","DOIUrl":"https://doi.org/10.1109/SPEC52827.2021.9709489","url":null,"abstract":"The DC microgrid with photovoltaic and energy storage system has become a prevailing trend for new energy. However, the whole system involves a variety of power electronic converter interactions, so it is necessary to conduct system stability analysis. Firstly, the topology and control strategies of the DC microgrid with photovoltaic and energy storage system are introduced, including photovoltaic power generation system and its control, energy storage system and its control, and grid and grid-side converter topology and its control. Secondly, the impedance or admittance of these three units are modeled separately. Next, each unit is equivalent into the corresponding voltage source system or current source system, and the impedance proportion of the DC microgrid with photovoltaic and energy storage system is obtained. Then based on the Nyquist stability criterion, the obtained impedance proportion is used to analyze the impacts of the proportional parameters of the voltage loop of the grid-side converter, the control parameters of the current loop of the energy storage system, as well as the capacity of the energy storage system and the charging and discharging states of the energy storage on the stability of the DC microgrid with photovoltaic and energy storage system.","PeriodicalId":236251,"journal":{"name":"2021 IEEE Southern Power Electronics Conference (SPEC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122111243","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 : 2021-12-06DOI: 10.1109/SPEC52827.2021.9709448
Precious Aiwuyo Omorogbe, A. Griffiths, Monday Ikhide, S. Tennakoon
Fault vulnerability and protection issues have been identified by systems developers and researchers as one of the major challenges in the drive towards HVDC grids. This is largely due to the relatively low inductance in DC systems, zero crossing issues, selectivity, as well as the vulnerability of the power electronic converters. Therefore, fast and selective protection algorithms are required to prevent both the systems and devices from damage. This paper investigates the distinct features of wavelet transform (WT) in fault identification and discrimination for application to HVDC Grids. In this paper, the simulation results provide relevant evidence of WT ability to detect and discriminate between internal and external faults using WT coefficients and wavelet entropy (WE). The simulation results presented revealed that discrimination was achieved within $(500 mu s)$ following the arrival of the fault components at the relay terminals; up to a fault resistance of 500 ohms.
{"title":"An Investigation of the Distinct Features of Wavelet Transform Based Protection Strategy for Consideration in HVDC Grids.","authors":"Precious Aiwuyo Omorogbe, A. Griffiths, Monday Ikhide, S. Tennakoon","doi":"10.1109/SPEC52827.2021.9709448","DOIUrl":"https://doi.org/10.1109/SPEC52827.2021.9709448","url":null,"abstract":"Fault vulnerability and protection issues have been identified by systems developers and researchers as one of the major challenges in the drive towards HVDC grids. This is largely due to the relatively low inductance in DC systems, zero crossing issues, selectivity, as well as the vulnerability of the power electronic converters. Therefore, fast and selective protection algorithms are required to prevent both the systems and devices from damage. This paper investigates the distinct features of wavelet transform (WT) in fault identification and discrimination for application to HVDC Grids. In this paper, the simulation results provide relevant evidence of WT ability to detect and discriminate between internal and external faults using WT coefficients and wavelet entropy (WE). The simulation results presented revealed that discrimination was achieved within $(500 mu s)$ following the arrival of the fault components at the relay terminals; up to a fault resistance of 500 ohms.","PeriodicalId":236251,"journal":{"name":"2021 IEEE Southern Power Electronics Conference (SPEC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121671695","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 : 2021-12-06DOI: 10.1109/SPEC52827.2021.9709466
Chenyan Zhu, Yeran Liu, Jianfeng Gao, R. Mai
Wireless power transfer (WPT) system has drawn wide attention since it is a convenient and safe charging method. However, coil misalignment is inevitable for the WPT system, leading to a reduction of efficiency. The dual transmitter (TX) and single receiver (RX) system can improve efficiency in the misalignment condition by controlling the currents of TX, but at the cost of adopting two inverters to individually control each TX. Hence, this digest proposes a cost-effective and independent dual output inverter (IDOI) employing six MOSFETs, to improve the system efficiency under coil misalignment. The operation principle of the IDOI to achieve independent control is introduced, and the optimal control method of the IDOI to achieve maximum efficiency point is proposed then. The optimal efficiency simulation based on the IDOI with dual TX and single RX is established to validate the feasibility of the proposed method.
{"title":"Cost-effective and Independent Dual-Output Inverter for Wireless Power Transfer System under Coil Misalignment","authors":"Chenyan Zhu, Yeran Liu, Jianfeng Gao, R. Mai","doi":"10.1109/SPEC52827.2021.9709466","DOIUrl":"https://doi.org/10.1109/SPEC52827.2021.9709466","url":null,"abstract":"Wireless power transfer (WPT) system has drawn wide attention since it is a convenient and safe charging method. However, coil misalignment is inevitable for the WPT system, leading to a reduction of efficiency. The dual transmitter (TX) and single receiver (RX) system can improve efficiency in the misalignment condition by controlling the currents of TX, but at the cost of adopting two inverters to individually control each TX. Hence, this digest proposes a cost-effective and independent dual output inverter (IDOI) employing six MOSFETs, to improve the system efficiency under coil misalignment. The operation principle of the IDOI to achieve independent control is introduced, and the optimal control method of the IDOI to achieve maximum efficiency point is proposed then. The optimal efficiency simulation based on the IDOI with dual TX and single RX is established to validate the feasibility of the proposed method.","PeriodicalId":236251,"journal":{"name":"2021 IEEE Southern Power Electronics Conference (SPEC)","volume":"470 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114811341","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 : 2021-12-06DOI: 10.1109/SPEC52827.2021.9709472
A. Aluko, D. Dorrell, E. Ojo
The continuous increase in the share of renewable energy generation and varying power demand are rendering the frequency stability of the isolated microgrids (MGs) volatile. Likewise, the communication layer in smart MGs is prone to cyberattacks that may affect the physical operation of the MG elements. Thus, there is a need to develop advanced and resilient frequency control schemes to mitigate the impacts of different perturbations that can compromise the frequency stability of the MG. This paper deploys the unknown input observer (UIO) in the secondary frequency control (SFC) loop of the MG for unknown input estimation. The developed UIO has the capability to detect and estimate cyberattacks and use the estimated cyberattack to counterattack the true cyberattack, thus, maintaining the stability of the MG. The simulation results show that the designed UIO strategy can guarantee the invulnerable operation of the MG in the presence of cyberattacks.
{"title":"Observer-Based Detection and Mitigation Scheme for Isolated Microgrid Under False Data Injection Attack","authors":"A. Aluko, D. Dorrell, E. Ojo","doi":"10.1109/SPEC52827.2021.9709472","DOIUrl":"https://doi.org/10.1109/SPEC52827.2021.9709472","url":null,"abstract":"The continuous increase in the share of renewable energy generation and varying power demand are rendering the frequency stability of the isolated microgrids (MGs) volatile. Likewise, the communication layer in smart MGs is prone to cyberattacks that may affect the physical operation of the MG elements. Thus, there is a need to develop advanced and resilient frequency control schemes to mitigate the impacts of different perturbations that can compromise the frequency stability of the MG. This paper deploys the unknown input observer (UIO) in the secondary frequency control (SFC) loop of the MG for unknown input estimation. The developed UIO has the capability to detect and estimate cyberattacks and use the estimated cyberattack to counterattack the true cyberattack, thus, maintaining the stability of the MG. The simulation results show that the designed UIO strategy can guarantee the invulnerable operation of the MG in the presence of cyberattacks.","PeriodicalId":236251,"journal":{"name":"2021 IEEE Southern Power Electronics Conference (SPEC)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127753679","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 : 2021-12-06DOI: 10.1109/SPEC52827.2021.9709492
Bingkun Song, U. Madawala, C. Baguley
To meet climate change targets and reduce air pollution, the global passenger vehicle sector is in the process of being electrified. To sustain this process, increased levels of publicly available electric vehicle (EV) charging infrastructure (CI), are required. This must be done in a manner that meets the charging demands of EV users in both spatial and temporal dimensions. However, meeting charging demands presents challenges in terms of EV CI planning and charging service operation. In addition, large-scale charging demands could compromise the stable and economic operation of the power grid. In order to mitigate grid impacts and overcome demand-side issues, it is crucial to deploy CI strategically and to operate charging services properly. The objective of this paper is to aid readers by reviewing research in this area. Accordingly, this paper summarizes grid impact and demand-side issues, before relating these issues to the literature on CI planning and the operational strategies of EV charging service provision.
{"title":"A Review of Grid Impacts, Demand Side Issues and Planning Related to Electric Vehicle Charging","authors":"Bingkun Song, U. Madawala, C. Baguley","doi":"10.1109/SPEC52827.2021.9709492","DOIUrl":"https://doi.org/10.1109/SPEC52827.2021.9709492","url":null,"abstract":"To meet climate change targets and reduce air pollution, the global passenger vehicle sector is in the process of being electrified. To sustain this process, increased levels of publicly available electric vehicle (EV) charging infrastructure (CI), are required. This must be done in a manner that meets the charging demands of EV users in both spatial and temporal dimensions. However, meeting charging demands presents challenges in terms of EV CI planning and charging service operation. In addition, large-scale charging demands could compromise the stable and economic operation of the power grid. In order to mitigate grid impacts and overcome demand-side issues, it is crucial to deploy CI strategically and to operate charging services properly. The objective of this paper is to aid readers by reviewing research in this area. Accordingly, this paper summarizes grid impact and demand-side issues, before relating these issues to the literature on CI planning and the operational strategies of EV charging service provision.","PeriodicalId":236251,"journal":{"name":"2021 IEEE Southern Power Electronics Conference (SPEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128945453","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 : 2021-12-06DOI: 10.1109/SPEC52827.2021.9709478
Saad Khadar, A. Kouzou, Mostefa Mohamed-Seghir
Open-End Winding Five-Phase Induction Motors (OEW-FPIM) are employed in high power applications where the reduction in the total power per phase and the highest level of overall system reliability is required. This paper deals with the stability problem of adaptive full-order observer (AFO) for speed-sensorless direct torque control (DTC) of an open-end winding five-phase induction motor. The stability of proposed observer is demonstrated through Lyapunov theorem. The proposed solution leads to improve the robustness of the drive system. The complete sensorless DTC with proposed observer is successfully implemented in real time using a digital signal processor board DSpace DS1103 for a laboratory 2.2 kW FPIM drive. The obtained results confirm the enhanced performance and the clear efficacy of the proposed control technique under a variety of cases of different operating conditions.
{"title":"Stability Analysis of Adaptive Full-Order Observer for Open-End Winding Five-Phase Induction Motor","authors":"Saad Khadar, A. Kouzou, Mostefa Mohamed-Seghir","doi":"10.1109/SPEC52827.2021.9709478","DOIUrl":"https://doi.org/10.1109/SPEC52827.2021.9709478","url":null,"abstract":"Open-End Winding Five-Phase Induction Motors (OEW-FPIM) are employed in high power applications where the reduction in the total power per phase and the highest level of overall system reliability is required. This paper deals with the stability problem of adaptive full-order observer (AFO) for speed-sensorless direct torque control (DTC) of an open-end winding five-phase induction motor. The stability of proposed observer is demonstrated through Lyapunov theorem. The proposed solution leads to improve the robustness of the drive system. The complete sensorless DTC with proposed observer is successfully implemented in real time using a digital signal processor board DSpace DS1103 for a laboratory 2.2 kW FPIM drive. The obtained results confirm the enhanced performance and the clear efficacy of the proposed control technique under a variety of cases of different operating conditions.","PeriodicalId":236251,"journal":{"name":"2021 IEEE Southern Power Electronics Conference (SPEC)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130937550","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 : 2021-12-06DOI: 10.1109/SPEC52827.2021.9709465
Boniface Ntambara, Ritha Umuhoza
Electricity overload endures an enormous loss experienced by electricity utility companies. These drawbacks arise because of actions carried out by most consumers such as metering systems overconsumption, industrial and distribution transformer overloads. Conventionally, the load management systems were proposed to tackle the problems by notifying the utility companies about the consumer load status but these systems are high energy consumption, high cost, and unable to provide the consumer location and accurate information. This paper develops the intelligent system for handling the issues by designing a three-phase smart energy meter perceptively based on Global System for Mobile Communications (GSM) and Global Positioning System (GPS) technologies interfaced by Arduino UNO. This microcontroller measures the three phase’s current and voltage and from these readings, powers were determined. Each phase, the predefined values of load were set, and whenever this threshold load values were exceeded, the consumer and utility got a message from GSM texted: “Dear Consumer, System is overloaded, Please manage it and RESET.”, otherwise the system was disconnected from the supply and GPS module was connected to the microcontroller to provide the location of the consumer. The results indicated that the system accurately has detected and reported the overload condition by tripping the energy meter and localizing the consumer. The IoT with AI technologies can be considered for future works.
{"title":"Design of Low Cost and Energy Efficient Smart Energy Meter of Overload Tripping with Recognition and Notification Systems based on Internet of Things","authors":"Boniface Ntambara, Ritha Umuhoza","doi":"10.1109/SPEC52827.2021.9709465","DOIUrl":"https://doi.org/10.1109/SPEC52827.2021.9709465","url":null,"abstract":"Electricity overload endures an enormous loss experienced by electricity utility companies. These drawbacks arise because of actions carried out by most consumers such as metering systems overconsumption, industrial and distribution transformer overloads. Conventionally, the load management systems were proposed to tackle the problems by notifying the utility companies about the consumer load status but these systems are high energy consumption, high cost, and unable to provide the consumer location and accurate information. This paper develops the intelligent system for handling the issues by designing a three-phase smart energy meter perceptively based on Global System for Mobile Communications (GSM) and Global Positioning System (GPS) technologies interfaced by Arduino UNO. This microcontroller measures the three phase’s current and voltage and from these readings, powers were determined. Each phase, the predefined values of load were set, and whenever this threshold load values were exceeded, the consumer and utility got a message from GSM texted: “Dear Consumer, System is overloaded, Please manage it and RESET.”, otherwise the system was disconnected from the supply and GPS module was connected to the microcontroller to provide the location of the consumer. The results indicated that the system accurately has detected and reported the overload condition by tripping the energy meter and localizing the consumer. The IoT with AI technologies can be considered for future works.","PeriodicalId":236251,"journal":{"name":"2021 IEEE Southern Power Electronics Conference (SPEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115707734","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 : 2021-12-06DOI: 10.1109/SPEC52827.2021.9709471
M. P. Dias, J. Ota, J. Pomilio
Bipolar dc grid in More Electric Aircraft (MEA) is expecting to face an increase of loading, which may lead to load unbalancing due to the load characteristics. Nonetheless, the bipolar dc grid has to comply with the present standards regarding the current unbalance between its positive and negative poles. In this context, a dc current redistributor is proposed, which is to be applied in embedded dc grids which integrate dc loads to the MEA environment. The dc current redistributor has the capability to balance the positive and negative poles currents on the bipolar dc grid of MEA. Moreover, due to its circuit topology, the dc current redistributor can also perform the interface to an emergency dc energy storage systems when loss of the line in the dc grid occurs. Mathematical models, analysis, and simulations are carried out to confirm the dynamics of the dc current redistributor when compensating unbalanced currents and supplying energy in loss of lines in dc grids.
{"title":"DC Current Redistributor for Compensating Unbalanced Loads and Interfacing Energy Storage Systems in More Electrical Aircraft","authors":"M. P. Dias, J. Ota, J. Pomilio","doi":"10.1109/SPEC52827.2021.9709471","DOIUrl":"https://doi.org/10.1109/SPEC52827.2021.9709471","url":null,"abstract":"Bipolar dc grid in More Electric Aircraft (MEA) is expecting to face an increase of loading, which may lead to load unbalancing due to the load characteristics. Nonetheless, the bipolar dc grid has to comply with the present standards regarding the current unbalance between its positive and negative poles. In this context, a dc current redistributor is proposed, which is to be applied in embedded dc grids which integrate dc loads to the MEA environment. The dc current redistributor has the capability to balance the positive and negative poles currents on the bipolar dc grid of MEA. Moreover, due to its circuit topology, the dc current redistributor can also perform the interface to an emergency dc energy storage systems when loss of the line in the dc grid occurs. Mathematical models, analysis, and simulations are carried out to confirm the dynamics of the dc current redistributor when compensating unbalanced currents and supplying energy in loss of lines in dc grids.","PeriodicalId":236251,"journal":{"name":"2021 IEEE Southern Power Electronics Conference (SPEC)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122363620","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 : 2021-12-06DOI: 10.1109/SPEC52827.2021.9709455
Hanwen Zhang, Yanbo Wang, Zhe Chen
Multiport DC/DC converters (MPC) is becoming a promising configuration to integrate DC grids with different voltage levels. This paper presents a neutral-point clamped (NPC) converter-based MPC (NMPC), which is developed to interconnect medium voltage DC (MVDC) grid and low voltage DC (LVDC) grid. The circuit topology and operation principle of NMPC is first introduced. The soft-switching operation based on zero-voltage switching (ZVS) is developed to reduce switching loss. Simulation verification is implemented to validate the proposed MPC. The proposed NMPC may perform independent bidirectional power flow control among different ports without using decoupling algorithms. The proposed NMPC enables high voltage operation due to the application of 3-level converter. The power characterization of the NMPC is simple, which is beneficial to realize the decoupling power flow control among the interconnected DC ports.
{"title":"A Bidirectional Isolated Multiport DC-DC Converter for DC grid","authors":"Hanwen Zhang, Yanbo Wang, Zhe Chen","doi":"10.1109/SPEC52827.2021.9709455","DOIUrl":"https://doi.org/10.1109/SPEC52827.2021.9709455","url":null,"abstract":"Multiport DC/DC converters (MPC) is becoming a promising configuration to integrate DC grids with different voltage levels. This paper presents a neutral-point clamped (NPC) converter-based MPC (NMPC), which is developed to interconnect medium voltage DC (MVDC) grid and low voltage DC (LVDC) grid. The circuit topology and operation principle of NMPC is first introduced. The soft-switching operation based on zero-voltage switching (ZVS) is developed to reduce switching loss. Simulation verification is implemented to validate the proposed MPC. The proposed NMPC may perform independent bidirectional power flow control among different ports without using decoupling algorithms. The proposed NMPC enables high voltage operation due to the application of 3-level converter. The power characterization of the NMPC is simple, which is beneficial to realize the decoupling power flow control among the interconnected DC ports.","PeriodicalId":236251,"journal":{"name":"2021 IEEE Southern Power Electronics Conference (SPEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130426692","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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