Active Damping Adaptive Controller for Grid-Connected Inverter Under Weak Grid
The stability of grid-connected inverters is very sensitive to varying grid impedance, especially in the weak grid condition. In this paper, based on the Lyapunov method and with the micro-grid impedance identification, an active damping adaptive control strategy is proposed to guarantee local asymp...
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| Veröffentlicht in: | IEEE access 2021, Vol.9, p.132442-132454 |
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| creator | Li, Hong Ding, Xin Xue, Ruinan Li, Guojin Chen, Yanming |
| description | The stability of grid-connected inverters is very sensitive to varying grid impedance, especially in the weak grid condition. In this paper, based on the Lyapunov method and with the micro-grid impedance identification, an active damping adaptive control strategy is proposed to guarantee local asymptotic stability for an LCL inverter system. First, using the backstepping design and taking the state variable errors as new variables, an appropriate Lyapunov function is constructed, so that the asymptotic stability control law can be obtained. Then, with this asymptotic stability controller, taking the varying impedance into account, an adaptive controller is developed using the Lyapunov direct method. Hence, the controller presented here can assure asymptotic stability, the system performance can also be improved instantly according to the adaptive control, and the expected stability and performance can also be achieved. Finally, the feasibility of the proposed control strategy was verified via a simulation and an experiment. |
| doi_str_mv | 10.1109/ACCESS.2021.3115493 |
| format | Article |
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In this paper, based on the Lyapunov method and with the micro-grid impedance identification, an active damping adaptive control strategy is proposed to guarantee local asymptotic stability for an LCL inverter system. First, using the backstepping design and taking the state variable errors as new variables, an appropriate Lyapunov function is constructed, so that the asymptotic stability control law can be obtained. Then, with this asymptotic stability controller, taking the varying impedance into account, an adaptive controller is developed using the Lyapunov direct method. Hence, the controller presented here can assure asymptotic stability, the system performance can also be improved instantly according to the adaptive control, and the expected stability and performance can also be achieved. Finally, the feasibility of the proposed control strategy was verified via a simulation and an experiment.</description><identifier>ISSN: 2169-3536</identifier><identifier>EISSN: 2169-3536</identifier><identifier>DOI: 10.1109/ACCESS.2021.3115493</identifier><identifier>CODEN: IAECCG</identifier><language>eng</language><publisher>Piscataway: IEEE</publisher><subject>Active control ; Active damping ; Adaptive control ; Asymptotic methods ; Asymptotic properties ; Asymptotic stability ; Backstepping ; backstepping method ; Control stability ; Control theory ; Controllers ; Damping ; Distributed generation ; Impedance ; Inverters ; LCL grid-connected inverter ; Liapunov direct method ; Liapunov functions ; Lyapunov function ; Lyapunov methods ; Power system stability</subject><ispartof>IEEE access, 2021, Vol.9, p.132442-132454</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) 2021</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c408t-4329007c2909a2270dce3d6b443d1898a89d80479c597c611881c1fed70865f93</citedby><cites>FETCH-LOGICAL-c408t-4329007c2909a2270dce3d6b443d1898a89d80479c597c611881c1fed70865f93</cites><orcidid>0000-0002-7123-4774 ; 0000-0001-6902-5327 ; 0000-0002-7080-4448</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/9548038$$EHTML$$P50$$Gieee$$Hfree_for_read</linktohtml><link.rule.ids>314,776,780,860,2095,4009,27612,27902,27903,27904,54912</link.rule.ids></links><search><creatorcontrib>Li, Hong</creatorcontrib><creatorcontrib>Ding, Xin</creatorcontrib><creatorcontrib>Xue, Ruinan</creatorcontrib><creatorcontrib>Li, Guojin</creatorcontrib><creatorcontrib>Chen, Yanming</creatorcontrib><title>Active Damping Adaptive Controller for Grid-Connected Inverter Under Weak Grid</title><title>IEEE access</title><addtitle>Access</addtitle><description>The stability of grid-connected inverters is very sensitive to varying grid impedance, especially in the weak grid condition. In this paper, based on the Lyapunov method and with the micro-grid impedance identification, an active damping adaptive control strategy is proposed to guarantee local asymptotic stability for an LCL inverter system. First, using the backstepping design and taking the state variable errors as new variables, an appropriate Lyapunov function is constructed, so that the asymptotic stability control law can be obtained. Then, with this asymptotic stability controller, taking the varying impedance into account, an adaptive controller is developed using the Lyapunov direct method. Hence, the controller presented here can assure asymptotic stability, the system performance can also be improved instantly according to the adaptive control, and the expected stability and performance can also be achieved. Finally, the feasibility of the proposed control strategy was verified via a simulation and an experiment.</description><subject>Active control</subject><subject>Active damping</subject><subject>Adaptive control</subject><subject>Asymptotic methods</subject><subject>Asymptotic properties</subject><subject>Asymptotic stability</subject><subject>Backstepping</subject><subject>backstepping method</subject><subject>Control stability</subject><subject>Control theory</subject><subject>Controllers</subject><subject>Damping</subject><subject>Distributed generation</subject><subject>Impedance</subject><subject>Inverters</subject><subject>LCL grid-connected inverter</subject><subject>Liapunov direct method</subject><subject>Liapunov functions</subject><subject>Lyapunov function</subject><subject>Lyapunov methods</subject><subject>Power system stability</subject><issn>2169-3536</issn><issn>2169-3536</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>ESBDL</sourceid><sourceid>RIE</sourceid><sourceid>DOA</sourceid><recordid>eNpNUV1rwjAULWODyeYv8KWw57p8tslj6ZwTZHtwsscQk1upq02XVmH_ftGK7D6cG07OOQmcKJpgNMUYyee8KGar1ZQggqcUY84kvYlGBKcyoZymt__O99G463YojAgUz0bRe2766gjxi963VbONc6vbM1G4pveursHHpfPx3Fc2CVwDpgcbL5oj-D7crRsb8Av091nyGN2Vuu5gfNkP0fp19lm8JcuP-aLIl4lhSPQJo0QilJmAUhOSIWuA2nTDGLVYSKGFtAKxTBouM5NiLAQ2uASbIZHyUtKHaDHkWqd3qvXVXvtf5XSlzoTzW6V9X5kaFLCSpyW2UktgKWHaso1gSGeSEG03p6ynIav17ucAXa927uCb8H1FeCYIFRzzoKKDynjXdR7K66sYqVMPauhBnXpQlx6CazK4KgC4OiRnAlFB_wBEP4Fx</recordid><startdate>2021</startdate><enddate>2021</enddate><creator>Li, Hong</creator><creator>Ding, Xin</creator><creator>Xue, Ruinan</creator><creator>Li, Guojin</creator><creator>Chen, Yanming</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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In this paper, based on the Lyapunov method and with the micro-grid impedance identification, an active damping adaptive control strategy is proposed to guarantee local asymptotic stability for an LCL inverter system. First, using the backstepping design and taking the state variable errors as new variables, an appropriate Lyapunov function is constructed, so that the asymptotic stability control law can be obtained. Then, with this asymptotic stability controller, taking the varying impedance into account, an adaptive controller is developed using the Lyapunov direct method. Hence, the controller presented here can assure asymptotic stability, the system performance can also be improved instantly according to the adaptive control, and the expected stability and performance can also be achieved. 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| subjects | Active control Active damping Adaptive control Asymptotic methods Asymptotic properties Asymptotic stability Backstepping backstepping method Control stability Control theory Controllers Damping Distributed generation Impedance Inverters LCL grid-connected inverter Liapunov direct method Liapunov functions Lyapunov function Lyapunov methods Power system stability |
| title | Active Damping Adaptive Controller for Grid-Connected Inverter Under Weak Grid |
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