Pub Date : 2015-10-29DOI: 10.1109/ECCE.2015.7310376
Ashish Kumar, K. Afridi
This paper introduces a new isolated resonant dc-dc converter topology based on the recently proposed impedance control network (ICN) converter architecture. This new converter maintains very high efficiency by achieving zero voltage switching (ZVS) and near zero current switching (ZCS) across a very wide operating range. Additional performance enhancement is achieved through a new design methodology that minimizes switching and conduction losses. This ICN converter implementation incorporates full-bridge synchronous rectification and is well-suited for low output voltage and high output current applications. A prototype 550 W, 1 MHz ICN converter designed to operate over an input voltage range of 36 V to 60 V, an output voltage range of 34 V to 55 V, and a 10:1 output power range is built and tested. The prototyped ICN converter achieves a peak efficiency of 97.6%, maintains full power efficiency greater than 96.5% at 34 V output voltage across the nearly 2:1 input voltage range, and maintains full power efficiency above 95.3% across its full input and output voltage range. It also maintains efficiency above 93.6% over a 10:1 output power range across its full input and output voltage range owing to the use of burst-mode control.
{"title":"Megahertz-frequency isolated resonant dc-dc converter using impedance control network for high-efficiency wide-range operation","authors":"Ashish Kumar, K. Afridi","doi":"10.1109/ECCE.2015.7310376","DOIUrl":"https://doi.org/10.1109/ECCE.2015.7310376","url":null,"abstract":"This paper introduces a new isolated resonant dc-dc converter topology based on the recently proposed impedance control network (ICN) converter architecture. This new converter maintains very high efficiency by achieving zero voltage switching (ZVS) and near zero current switching (ZCS) across a very wide operating range. Additional performance enhancement is achieved through a new design methodology that minimizes switching and conduction losses. This ICN converter implementation incorporates full-bridge synchronous rectification and is well-suited for low output voltage and high output current applications. A prototype 550 W, 1 MHz ICN converter designed to operate over an input voltage range of 36 V to 60 V, an output voltage range of 34 V to 55 V, and a 10:1 output power range is built and tested. The prototyped ICN converter achieves a peak efficiency of 97.6%, maintains full power efficiency greater than 96.5% at 34 V output voltage across the nearly 2:1 input voltage range, and maintains full power efficiency above 95.3% across its full input and output voltage range. It also maintains efficiency above 93.6% over a 10:1 output power range across its full input and output voltage range owing to the use of burst-mode control.","PeriodicalId":6654,"journal":{"name":"2015 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"66 1","pages":"5081-5088"},"PeriodicalIF":0.0,"publicationDate":"2015-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89018017","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 : 2015-10-29DOI: 10.1109/ECCE.2015.7309996
S. Balasubramaniam, J. Liang, C. E. Ugalde-Loo
In recent years, the demand for HVDC grids has greatly increased due to the integration of renewable energy, especially offshore wind energy. The current flow within the DC grid is passively determined by the resistance of the DC lines. In a complex DC grid, the current flow in each cable cannot be precisely controlled by adjusting the voltage set points of each converter and an overload may occur. In order to improve the efficiency of the branch utilization and the reliability of the grid, the current flow has to be rescheduled between DC nodes. This can be achieved by introducing a series current flow controller (CFC). This paper discusses the operation and control of a dual H-bridge CFC on a meshed connected DC grid. Two different strategies have been proposed to control the CFC, namely, master-slave control and single modulation control. A four-terminal DC grid has been modelled in Simulink/ SimPowerSystems to analyse the dynamic performance of the CFC under the proposed control strategies and a DC fault. The strategies have been compared in terms of system power losses. In addition, the operation and control of a reduced IGBT-based CFC is presented.
{"title":"Control, dynamics and operation of a dual H-bridge current flow controller","authors":"S. Balasubramaniam, J. Liang, C. E. Ugalde-Loo","doi":"10.1109/ECCE.2015.7309996","DOIUrl":"https://doi.org/10.1109/ECCE.2015.7309996","url":null,"abstract":"In recent years, the demand for HVDC grids has greatly increased due to the integration of renewable energy, especially offshore wind energy. The current flow within the DC grid is passively determined by the resistance of the DC lines. In a complex DC grid, the current flow in each cable cannot be precisely controlled by adjusting the voltage set points of each converter and an overload may occur. In order to improve the efficiency of the branch utilization and the reliability of the grid, the current flow has to be rescheduled between DC nodes. This can be achieved by introducing a series current flow controller (CFC). This paper discusses the operation and control of a dual H-bridge CFC on a meshed connected DC grid. Two different strategies have been proposed to control the CFC, namely, master-slave control and single modulation control. A four-terminal DC grid has been modelled in Simulink/ SimPowerSystems to analyse the dynamic performance of the CFC under the proposed control strategies and a DC fault. The strategies have been compared in terms of system power losses. In addition, the operation and control of a reduced IGBT-based CFC is presented.","PeriodicalId":6654,"journal":{"name":"2015 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"76 3","pages":"2386-2393"},"PeriodicalIF":0.0,"publicationDate":"2015-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91511986","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 : 2015-10-29DOI: 10.1109/ECCE.2015.7309938
Stefano Lissandron, R. Sgarbossa, Luca Dalla Santa, P. Mattavelli, R. Turri, A. Cerretti
Distributed Generation in Low Voltage grids has raised the concern of unintentional islanding and its probability has increased due to the newly introduced standards for generators, which in particular impose wider frequency and voltage ranges and active and reactive power support capabilities using of P/f and Q/V droop characteristics. Anti-islanding protections that each inverter is equipped with, may fail to detect the grid transition and so uncontrolled islanding operation may appear. This operation may be dangerous especially in presence of automatic reclosing procedure, because of possible out of phase reconnections. In this paper, the temporary unintentional islanding operation (e.g. below 600 ms) is studied considering the effects of P/f and Q/V droop characteristics of generators and their response times. A potential increase of such phenomenon will be shown with simulations and experimental results.
{"title":"ΔP — ΔQ area assessment of temporary unintentional islanding with P/f and Q/V droop controlled PV generators in distribution networks","authors":"Stefano Lissandron, R. Sgarbossa, Luca Dalla Santa, P. Mattavelli, R. Turri, A. Cerretti","doi":"10.1109/ECCE.2015.7309938","DOIUrl":"https://doi.org/10.1109/ECCE.2015.7309938","url":null,"abstract":"Distributed Generation in Low Voltage grids has raised the concern of unintentional islanding and its probability has increased due to the newly introduced standards for generators, which in particular impose wider frequency and voltage ranges and active and reactive power support capabilities using of P/f and Q/V droop characteristics. Anti-islanding protections that each inverter is equipped with, may fail to detect the grid transition and so uncontrolled islanding operation may appear. This operation may be dangerous especially in presence of automatic reclosing procedure, because of possible out of phase reconnections. In this paper, the temporary unintentional islanding operation (e.g. below 600 ms) is studied considering the effects of P/f and Q/V droop characteristics of generators and their response times. A potential increase of such phenomenon will be shown with simulations and experimental results.","PeriodicalId":6654,"journal":{"name":"2015 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"8 1","pages":"1968-1975"},"PeriodicalIF":0.0,"publicationDate":"2015-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88810512","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 : 2015-10-29DOI: 10.1109/ECCE.2015.7309818
K. Lentijo, D. Opila
Power converter operation on high-impedance grids can result in oscillatory behavior as a result of “self-synchronization” of an inverter's phase detection unit (PDU). This phenomenon is particularly of concern in renewable energy applications and it occurs when the converter's injected current changes the voltage angle at the point-of-common coupling (PCC) and synchronizes to itself through its PDU. One of the most prevalent PDUs in industry is based on the synchronous-reference frame (SRF) phase-locked loop (PLL). In this work the large signal stability limit of the SRF-PLL is modified to include the angle of reactive current injection, the phenomena of reduced gain margin as a result of self-synchronization is explained and a method to prevent the effects of self-synchronization is proposed and demonstrated. The proposed method is referred to as the grid-sync (GS) PLL and requires a real-time estimation of the grid impedance. The GS-PLL is shown to improve small-signal stability in order to reduce phase-margin erosion.
{"title":"Minimizing inverter self-synchronization due to reactive power injection on weak grids","authors":"K. Lentijo, D. Opila","doi":"10.1109/ECCE.2015.7309818","DOIUrl":"https://doi.org/10.1109/ECCE.2015.7309818","url":null,"abstract":"Power converter operation on high-impedance grids can result in oscillatory behavior as a result of “self-synchronization” of an inverter's phase detection unit (PDU). This phenomenon is particularly of concern in renewable energy applications and it occurs when the converter's injected current changes the voltage angle at the point-of-common coupling (PCC) and synchronizes to itself through its PDU. One of the most prevalent PDUs in industry is based on the synchronous-reference frame (SRF) phase-locked loop (PLL). In this work the large signal stability limit of the SRF-PLL is modified to include the angle of reactive current injection, the phenomena of reduced gain margin as a result of self-synchronization is explained and a method to prevent the effects of self-synchronization is proposed and demonstrated. The proposed method is referred to as the grid-sync (GS) PLL and requires a real-time estimation of the grid impedance. The GS-PLL is shown to improve small-signal stability in order to reduce phase-margin erosion.","PeriodicalId":6654,"journal":{"name":"2015 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"1 1","pages":"1136-1142"},"PeriodicalIF":0.0,"publicationDate":"2015-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89178773","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 : 2015-10-29DOI: 10.1109/ECCE.2015.7310481
P. Hsu, E. Muljadi, Ziping Wu, Wenzhong Gao
Wind power plant (WPP) is often operated at unity power factor, and the utility host where the WPP connected prefers to regulate the voltage. While this may not be an issue in a stiff grid, the connection to a weak grid can be problematic. This paper explores the advantages of having voltage regulation capability via reactive power control. Another issue in wind power generation is that not all turbines are able to control its reactive power due to technical reason or contractual obligations. A synchronous condenser (SC) using a permanent magnet synchronous generator (PMSG) is proposed for providing necessary reactive power for regulating voltage at a weak grid connection. A PMSG has the advantage of higher efficiency and reliability. Because of its lack of a field winding, a PMSG is typically controlled by a full-power converter, which can be costly. In the proposed system, the reactive power of the SC is controlled by a serially connected compensator operating in a closed-loop configuration. The compensator also damps the PMSG's tendency to oscillate. The compensator's VA rating is only a fraction of the rating of the SC and the PMSG. In this initial investigation, the proposed scheme is shown to be effective by computer simulations.
{"title":"Voltage regulation using a permanent magnet synchronous condenser with a series compensator","authors":"P. Hsu, E. Muljadi, Ziping Wu, Wenzhong Gao","doi":"10.1109/ECCE.2015.7310481","DOIUrl":"https://doi.org/10.1109/ECCE.2015.7310481","url":null,"abstract":"Wind power plant (WPP) is often operated at unity power factor, and the utility host where the WPP connected prefers to regulate the voltage. While this may not be an issue in a stiff grid, the connection to a weak grid can be problematic. This paper explores the advantages of having voltage regulation capability via reactive power control. Another issue in wind power generation is that not all turbines are able to control its reactive power due to technical reason or contractual obligations. A synchronous condenser (SC) using a permanent magnet synchronous generator (PMSG) is proposed for providing necessary reactive power for regulating voltage at a weak grid connection. A PMSG has the advantage of higher efficiency and reliability. Because of its lack of a field winding, a PMSG is typically controlled by a full-power converter, which can be costly. In the proposed system, the reactive power of the SC is controlled by a serially connected compensator operating in a closed-loop configuration. The compensator also damps the PMSG's tendency to oscillate. The compensator's VA rating is only a fraction of the rating of the SC and the PMSG. In this initial investigation, the proposed scheme is shown to be effective by computer simulations.","PeriodicalId":6654,"journal":{"name":"2015 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"1 1","pages":"5851-5856"},"PeriodicalIF":0.0,"publicationDate":"2015-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83113345","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 : 2015-10-29DOI: 10.1109/ECCE.2015.7310593
Wen Cai, Fan Yi
This paper presents a topology derivation method based on switch multiplexing to simplify the configuration of multi-port power electronics interface (MPEI) for DC microgrid applications. In order to achieve reliability and efficiency enhancement of MPEI, the configuration of MPEI is to be optimized according to multiple objectives especially the characteristic of all the ports. Firstly, MPEI is separated and summarized as two basic units of bi-directional power transfer. Subsequently, by combining the basic units and multiplexing switches, the switch number in the overall system can be reduced. This, in turns increases power density and affordability. Meanwhile the system efficiency could be improved in some applications by using the proposed topologies. After the topology deduction, the work conditions for all kinds of topologies are introduced briefly which can guide the selection of various configurations. At last, the feasibility of some derived topologies is verified with experimental results.
{"title":"Topology simplification method based on switch multiplexing technique to deliver DC-DC-AC converters for microgrid applications","authors":"Wen Cai, Fan Yi","doi":"10.1109/ECCE.2015.7310593","DOIUrl":"https://doi.org/10.1109/ECCE.2015.7310593","url":null,"abstract":"This paper presents a topology derivation method based on switch multiplexing to simplify the configuration of multi-port power electronics interface (MPEI) for DC microgrid applications. In order to achieve reliability and efficiency enhancement of MPEI, the configuration of MPEI is to be optimized according to multiple objectives especially the characteristic of all the ports. Firstly, MPEI is separated and summarized as two basic units of bi-directional power transfer. Subsequently, by combining the basic units and multiplexing switches, the switch number in the overall system can be reduced. This, in turns increases power density and affordability. Meanwhile the system efficiency could be improved in some applications by using the proposed topologies. After the topology deduction, the work conditions for all kinds of topologies are introduced briefly which can guide the selection of various configurations. At last, the feasibility of some derived topologies is verified with experimental results.","PeriodicalId":6654,"journal":{"name":"2015 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"208 1","pages":"6667-6674"},"PeriodicalIF":0.0,"publicationDate":"2015-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80539919","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 : 2015-10-29DOI: 10.1109/ECCE.2015.7309747
V. Vaisanen, Jani Hiltunen
This paper presents an algorithm for seeking the most suitable operating point and the maximum efficiency in respect of the operating conditions in a dual active bridge converter. The method is the most suitable for half-bridge variants of the dual active bridge since the previously presented modulation methods are derived only for full-bridge configurations. The maximum efficiency point tracking method is based on a perturb-and-observe type tracker and a variable frequency modulation method where the turn-on currents of the primary and secondary bridges can be adjusted by using closed-form expressions.
{"title":"Maximum efficiency point tracking algorithm for dual active bridge converters","authors":"V. Vaisanen, Jani Hiltunen","doi":"10.1109/ECCE.2015.7309747","DOIUrl":"https://doi.org/10.1109/ECCE.2015.7309747","url":null,"abstract":"This paper presents an algorithm for seeking the most suitable operating point and the maximum efficiency in respect of the operating conditions in a dual active bridge converter. The method is the most suitable for half-bridge variants of the dual active bridge since the previously presented modulation methods are derived only for full-bridge configurations. The maximum efficiency point tracking method is based on a perturb-and-observe type tracker and a variable frequency modulation method where the turn-on currents of the primary and secondary bridges can be adjusted by using closed-form expressions.","PeriodicalId":6654,"journal":{"name":"2015 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"41 1","pages":"623-629"},"PeriodicalIF":0.0,"publicationDate":"2015-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80671377","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 : 2015-10-29DOI: 10.1109/ECCE.2015.7309715
C. Tang, Mingchen Hou, Xueyang Li, G. Xie, Kuang Sheng
In this paper, we report for the first time, an enhancement-mode (E-mode) Al2O3/GaN metal-oxide-semiconductor high-electron-mobility-transistor (MOS-HEMT) using CMOS-compatible techniques including gate region local thermal oxidation and organic alkaline solution (TMAH) wet etching. The fabricated MOS-HEMT exhibits a high positive threshold voltage of +2.5 V, indicating complete pinch-off of the 2 dimensional electron gas (2DEG) channel. Maximum drain current of 250 mA/mm and an off-state breakdown voltage up to 930 V at a 0 V gate bias are observed for the fabricated device of LG = 2.0 μm and LGD = 14 μm, manifesting a low cost, highly repeatable CMOS compatible fabrication method of normally-off GaN-on-Si devices for power electronics applications.
{"title":"CMOS-compatible ehancement-mode GaN-on-Si MOS-HEMT with high breakdown voltage (930V) using thermal oxidation and TMAH wet etching","authors":"C. Tang, Mingchen Hou, Xueyang Li, G. Xie, Kuang Sheng","doi":"10.1109/ECCE.2015.7309715","DOIUrl":"https://doi.org/10.1109/ECCE.2015.7309715","url":null,"abstract":"In this paper, we report for the first time, an enhancement-mode (E-mode) Al2O3/GaN metal-oxide-semiconductor high-electron-mobility-transistor (MOS-HEMT) using CMOS-compatible techniques including gate region local thermal oxidation and organic alkaline solution (TMAH) wet etching. The fabricated MOS-HEMT exhibits a high positive threshold voltage of +2.5 V, indicating complete pinch-off of the 2 dimensional electron gas (2DEG) channel. Maximum drain current of 250 mA/mm and an off-state breakdown voltage up to 930 V at a 0 V gate bias are observed for the fabricated device of LG = 2.0 μm and LGD = 14 μm, manifesting a low cost, highly repeatable CMOS compatible fabrication method of normally-off GaN-on-Si devices for power electronics applications.","PeriodicalId":6654,"journal":{"name":"2015 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"30 1","pages":"396-399"},"PeriodicalIF":0.0,"publicationDate":"2015-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80685862","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 : 2015-10-29DOI: 10.1109/ECCE.2015.7309861
B. Cassidy, D. Ha, Qiang Li
Car black boxes operate mostly in sleep mode, which requires high efficiency for light load. We propose two schemes to improve light load efficiency of the 3-level buck converter proposed by Reusch. The first scheme is to adopt constant ON-time control with DCM for light load. The second scheme is to shut down the gate drivers for the two bottom MOSFETs allowing Schottky diodes in parallel to conduct the inductor current, in the very light load condition. The proposed converter is prototyped using off-the-shelf components. The efficiency of the proposed 3-level buck converter ranges from 82% to 95% at 100 mW and 5 W, respectively.
{"title":"Constant ON-time 3-level buck converter for low power applications","authors":"B. Cassidy, D. Ha, Qiang Li","doi":"10.1109/ECCE.2015.7309861","DOIUrl":"https://doi.org/10.1109/ECCE.2015.7309861","url":null,"abstract":"Car black boxes operate mostly in sleep mode, which requires high efficiency for light load. We propose two schemes to improve light load efficiency of the 3-level buck converter proposed by Reusch. The first scheme is to adopt constant ON-time control with DCM for light load. The second scheme is to shut down the gate drivers for the two bottom MOSFETs allowing Schottky diodes in parallel to conduct the inductor current, in the very light load condition. The proposed converter is prototyped using off-the-shelf components. The efficiency of the proposed 3-level buck converter ranges from 82% to 95% at 100 mW and 5 W, respectively.","PeriodicalId":6654,"journal":{"name":"2015 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"8 1","pages":"1434-1441"},"PeriodicalIF":0.0,"publicationDate":"2015-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80707105","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 : 2015-10-29DOI: 10.1109/ECCE.2015.7310536
Fei Gao, S. Bozhko, G. Asher, P. Wheeler
In presence of tightly regulated power electronic converters and motor drives in the more electric aircraft (MEA), stability is a great concern for the electrical power system (EPS) in the MEA. The DC electrical power distribution system (EPDS) of the MEA is one of the core architecture for electrical power transmission. DC transmission cables are also taken into account since it cannot be neglected in such low voltage microgrid. Proper active power is regulated by DC current control for the active rectifier. Both the output current of the active rectifier and the current after the capacitor can be used as feedback variable of the controller. This paper undertakes the comparative stability study on the DC current feedback approaches for droop-controlled PMSG system. The mathematical model and corresponding linearized model around the equilibrium point are developed. The state-space matrix is derived and the layout of the eigenvalues is shown for different methods respectively. The analysis is verified by time domain simulation results in Matlab/Simulink.
{"title":"Comparative stability study of DC current control strategies for a droop-controlled PMSG system","authors":"Fei Gao, S. Bozhko, G. Asher, P. Wheeler","doi":"10.1109/ECCE.2015.7310536","DOIUrl":"https://doi.org/10.1109/ECCE.2015.7310536","url":null,"abstract":"In presence of tightly regulated power electronic converters and motor drives in the more electric aircraft (MEA), stability is a great concern for the electrical power system (EPS) in the MEA. The DC electrical power distribution system (EPDS) of the MEA is one of the core architecture for electrical power transmission. DC transmission cables are also taken into account since it cannot be neglected in such low voltage microgrid. Proper active power is regulated by DC current control for the active rectifier. Both the output current of the active rectifier and the current after the capacitor can be used as feedback variable of the controller. This paper undertakes the comparative stability study on the DC current feedback approaches for droop-controlled PMSG system. The mathematical model and corresponding linearized model around the equilibrium point are developed. The state-space matrix is derived and the layout of the eigenvalues is shown for different methods respectively. The analysis is verified by time domain simulation results in Matlab/Simulink.","PeriodicalId":6654,"journal":{"name":"2015 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"114 1","pages":"6246-6253"},"PeriodicalIF":0.0,"publicationDate":"2015-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80736205","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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