Seamless Transfer of Single-Phase Grid-Interactive Inverters Between Grid-Connected and Stand-Alone Modes

This paper presents a novel seamless transfer of single-phase grid-interactive inverters between grid-connected and stand-alone modes. The grid-connected inverter should operate in grid-tied and off-grid modes in order to provide power to the emergency load during system outages. However, the grid c...

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Veröffentlicht in:IEEE transactions on power electronics 2010-06, Vol.25 (6), p.1597-1603
Hauptverfasser: Yao, Z, Xiao, L, Yan, Y
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Yan, Y
description This paper presents a novel seamless transfer of single-phase grid-interactive inverters between grid-connected and stand-alone modes. The grid-connected inverter should operate in grid-tied and off-grid modes in order to provide power to the emergency load during system outages. However, the grid current controller and the output voltage controller are switched between the two modes, so the outputs of both controllers may not be equal during the transfer instant, which will cause the current or voltage spikes during the switching process. The transfer between the two controllers does not exist in the proposed method. In grid-tied mode, the voltage controller is used for compensating the filter capacitor current, and the current controller is used to control the grid current. In stand-alone mode, the voltage controller is used to regulate the output voltage, whereas the output of the current controller is zero. With the proposed control method, the seamless transfer can be achieved between both modes, even in polluted grid voltage. The principle and realization conditions of the control methods at both modes are analyzed. The detailed process of the seamless transfer between the two modes is illustrated. Finally, the simulation and experimental results verify the theoretical analysis.
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The grid-connected inverter should operate in grid-tied and off-grid modes in order to provide power to the emergency load during system outages. However, the grid current controller and the output voltage controller are switched between the two modes, so the outputs of both controllers may not be equal during the transfer instant, which will cause the current or voltage spikes during the switching process. The transfer between the two controllers does not exist in the proposed method. In grid-tied mode, the voltage controller is used for compensating the filter capacitor current, and the current controller is used to control the grid current. In stand-alone mode, the voltage controller is used to regulate the output voltage, whereas the output of the current controller is zero. With the proposed control method, the seamless transfer can be achieved between both modes, even in polluted grid voltage. The principle and realization conditions of the control methods at both modes are analyzed. The detailed process of the seamless transfer between the two modes is illustrated. Finally, the simulation and experimental results verify the theoretical analysis.</description><identifier>ISSN: 0885-8993</identifier><identifier>EISSN: 1941-0107</identifier><identifier>DOI: 10.1109/TPEL.2009.2039357</identifier><identifier>CODEN: ITPEE8</identifier><language>eng</language><publisher>New York, NY: IEEE</publisher><subject>Analysis ; Applied sciences ; Capacitors ; Circuit properties ; Circuits of signal characteristics conditioning (including delay circuits) ; Distributed control ; Distributed power generation ; Electric currents ; Electric, optical and optoelectronic circuits ; Electrical engineering. Electrical power engineering ; Electrical power engineering ; Electricity ; Electronic circuits ; Electronic equipment and fabrication. Passive components, printed wiring boards, connectics ; Electronics ; Exact sciences and technology ; Filters ; grid-connected inverter ; grid-connected mode ; Inverters ; Operation. Load control. Reliability ; Pollution ; Power electronics, power supplies ; Power generation ; Power generation planning ; Power networks and lines ; seamless transfer ; Simulation ; stand-alone mode ; Standby generators ; Voltage control</subject><ispartof>IEEE transactions on power electronics, 2010-06, Vol.25 (6), p.1597-1603</ispartof><rights>2015 INIST-CNRS</rights><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. 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The grid-connected inverter should operate in grid-tied and off-grid modes in order to provide power to the emergency load during system outages. However, the grid current controller and the output voltage controller are switched between the two modes, so the outputs of both controllers may not be equal during the transfer instant, which will cause the current or voltage spikes during the switching process. The transfer between the two controllers does not exist in the proposed method. In grid-tied mode, the voltage controller is used for compensating the filter capacitor current, and the current controller is used to control the grid current. In stand-alone mode, the voltage controller is used to regulate the output voltage, whereas the output of the current controller is zero. With the proposed control method, the seamless transfer can be achieved between both modes, even in polluted grid voltage. The principle and realization conditions of the control methods at both modes are analyzed. The detailed process of the seamless transfer between the two modes is illustrated. Finally, the simulation and experimental results verify the theoretical analysis.</description><subject>Analysis</subject><subject>Applied sciences</subject><subject>Capacitors</subject><subject>Circuit properties</subject><subject>Circuits of signal characteristics conditioning (including delay circuits)</subject><subject>Distributed control</subject><subject>Distributed power generation</subject><subject>Electric currents</subject><subject>Electric, optical and optoelectronic circuits</subject><subject>Electrical engineering. Electrical power engineering</subject><subject>Electrical power engineering</subject><subject>Electricity</subject><subject>Electronic circuits</subject><subject>Electronic equipment and fabrication. Passive components, printed wiring boards, connectics</subject><subject>Electronics</subject><subject>Exact sciences and technology</subject><subject>Filters</subject><subject>grid-connected inverter</subject><subject>grid-connected mode</subject><subject>Inverters</subject><subject>Operation. Load control. Reliability</subject><subject>Pollution</subject><subject>Power electronics, power supplies</subject><subject>Power generation</subject><subject>Power generation planning</subject><subject>Power networks and lines</subject><subject>seamless transfer</subject><subject>Simulation</subject><subject>stand-alone mode</subject><subject>Standby generators</subject><subject>Voltage control</subject><issn>0885-8993</issn><issn>1941-0107</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNo9kFFLwzAQx4MoOKcfQHwJgo-dl6Zpk8c55hxMHGw-l7S9aEeXzqSb-O3N6NjLHcf97n_wI-SewYgxUM_r5XQxigFUKFxxkV2QAVMJi4BBdkkGIKWIpFL8mtx4vwFgiQA2IPUK9bZB7-naaesNOtoauqrtV4PR8lt7pDNXV9Hcduh02dUHpHN7QBdGT1-w-0W0PTJprcWyw4pqW9FVF2o0blqL9L2t0N-SK6Mbj3enPiSfr9P15C1afMzmk_EiKrmUXVSUaZZkiZGsiIWqtASALEmqVHMDsWFSpVwrw7k0iZBGp6bIilSYlMWCC1nyIXnsc3eu_dmj7_JNu3c2vMwFhOSgRwSI9VDpWu8dmnzn6q12fzmD_Cg0PwrNj0Lzk9Bw83QK1r7UjQm-ytqfD-NYQczSI_fQczUinteCZ0ypjP8DOoh98g</recordid><startdate>20100601</startdate><enddate>20100601</enddate><creator>Yao, Z</creator><creator>Xiao, L</creator><creator>Yan, Y</creator><general>IEEE</general><general>Institute of Electrical and Electronics Engineers</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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Electrical power engineering</topic><topic>Electrical power engineering</topic><topic>Electricity</topic><topic>Electronic circuits</topic><topic>Electronic equipment and fabrication. Passive components, printed wiring boards, connectics</topic><topic>Electronics</topic><topic>Exact sciences and technology</topic><topic>Filters</topic><topic>grid-connected inverter</topic><topic>grid-connected mode</topic><topic>Inverters</topic><topic>Operation. Load control. 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The grid-connected inverter should operate in grid-tied and off-grid modes in order to provide power to the emergency load during system outages. However, the grid current controller and the output voltage controller are switched between the two modes, so the outputs of both controllers may not be equal during the transfer instant, which will cause the current or voltage spikes during the switching process. The transfer between the two controllers does not exist in the proposed method. In grid-tied mode, the voltage controller is used for compensating the filter capacitor current, and the current controller is used to control the grid current. In stand-alone mode, the voltage controller is used to regulate the output voltage, whereas the output of the current controller is zero. With the proposed control method, the seamless transfer can be achieved between both modes, even in polluted grid voltage. The principle and realization conditions of the control methods at both modes are analyzed. The detailed process of the seamless transfer between the two modes is illustrated. Finally, the simulation and experimental results verify the theoretical analysis.</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/TPEL.2009.2039357</doi><tpages>7</tpages></addata></record>
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source IEEE Electronic Library (IEL)
subjects Analysis
Applied sciences
Capacitors
Circuit properties
Circuits of signal characteristics conditioning (including delay circuits)
Distributed control
Distributed power generation
Electric currents
Electric, optical and optoelectronic circuits
Electrical engineering. Electrical power engineering
Electrical power engineering
Electricity
Electronic circuits
Electronic equipment and fabrication. Passive components, printed wiring boards, connectics
Electronics
Exact sciences and technology
Filters
grid-connected inverter
grid-connected mode
Inverters
Operation. Load control. Reliability
Pollution
Power electronics, power supplies
Power generation
Power generation planning
Power networks and lines
seamless transfer
Simulation
stand-alone mode
Standby generators
Voltage control
title Seamless Transfer of Single-Phase Grid-Interactive Inverters Between Grid-Connected and Stand-Alone Modes
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