Research on Nonlinear Robust Control Strategy of Active Voltage Support for Grid-forming Photovoltaics

Research on Nonlinear Robust Control Strategy of Active Voltage Support for Grid-forming Photovoltaics | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Research on Nonlinear Robust Control Strategy of Active Voltage Support for Grid-forming Photovoltaics Zhongjian KANG, LU Dongjian This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4321153/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract With the integration of a large number of photovoltaic renewable energy into the power grid, on the one hand, it will lead to a decrease in the proportion of synchronous generators with large inertia in the power grid, and on the other hand, because photovoltaic needs to be connected to the grid through inverters and other devices containing a large number of power electronic components, the inertia of the power grid will be reduced, the robustness will become poor, and the system voltage will fluctuate. In order to solve the above problems, this paper proposes a voltage active support method based on the expansion state observer and the terminal sliding mode control strategy. Firstly, a grid-forming photovoltaic grid-connected microgrid model was built in Matelab/Smulink. Secondly, the voltage controller in the virtual synchronous generator control was redesigned according to the synchronous generator control and nonlinear robust control technology. By adding an extended state observer and terminal sliding mode control to the voltage controller, the purpose of active voltage support and improved control performance is realized. Through simulation analysis, the results show that when the photovoltaic output changes, the voltage controller based on the expansion state observer and terminal sliding mode control can not only realize the voltage regulation function, but also effectively reduce the overshoot of the system voltage, improve the voltage response speed, and enhance the system stability of the system when the photovoltaic output changes. PV grid-connected Virtual Synchronizer Control Expand the state observer Terminal sliding mode control Introduction Voltage active support control Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-4321153","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":295295295,"identity":"23235347-b0b7-4e95-b46e-06974a5eaa10","order_by":0,"name":"Zhongjian KANG","email":"","orcid":"","institution":"China University of Petroleum (East China)","correspondingAuthor":false,"prefix":"","firstName":"Zhongjian","middleName":"","lastName":"KANG","suffix":""},{"id":295295296,"identity":"f0d18b82-917a-4e93-bd6a-51fdd72fe0d5","order_by":1,"name":"LU Dongjian","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA90lEQVRIiWNgGAWjYBACPgYGAyDFxsPAwNj44EOFDQ8/fwN+LWwILczNhjPOpMlIzjhAlBYQYG+T5m07bGPQkEBAi0TyxscFv/hk+Gc3tknznDnPY8BwgPHDxxx8WtKKjWf2sfFI3DnYbDmn4jaPOXMDs+TMbfi05JhJ8/YA/XIjsfHGmzO3eSwbDrAx8xKjRf5GYoMEb9s5HoMDCURo4fnBxmNwI7FJkrftABFaeJ4VG/M2sPEY3kgEBXIyj+SMg814/cLPDgwxnj/H7OVupD8ERqWdPT9/88EPH/FoAQPGtmMo3AYC6kHgTw0RikbBKBgFo2DEAgAGAlCDALO+1gAAAABJRU5ErkJggg==","orcid":"","institution":"China University of Petroleum (East China)","correspondingAuthor":true,"prefix":"","firstName":"LU","middleName":"","lastName":"Dongjian","suffix":""}],"badges":[],"createdAt":"2024-04-25 03:10:02","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-4321153/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-4321153/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":59334778,"identity":"ddc4ce17-ce0a-48d3-bd28-0f5accb5fb83","added_by":"auto","created_at":"2024-06-29 21:17:23","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":526370,"visible":true,"origin":"","legend":"","description":"","filename":"file.pdf","url":"https://assets-eu.researchsquare.com/files/rs-4321153/v1_covered_c7c72ee9-2ca3-4444-945b-431227361f59.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Research on Nonlinear Robust Control Strategy of Active Voltage Support for Grid-forming Photovoltaics","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"PV grid-connected, Virtual Synchronizer Control, Expand the state observer, Terminal sliding mode control Introduction, Voltage active support control","lastPublishedDoi":"10.21203/rs.3.rs-4321153/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4321153/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eWith the integration of a large number of photovoltaic renewable energy into the power grid, on the one hand, it will lead to a decrease in the proportion of synchronous generators with large inertia in the power grid, and on the other hand, because photovoltaic needs to be connected to the grid through inverters and other devices containing a large number of power electronic components, the inertia of the power grid will be reduced, the robustness will become poor, and the system voltage will fluctuate. 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