Harmonic Suppression Method of Grid-Forming Inverter Based on Hybrid Impedance Reshaping Strategy

Harmonic Suppression Method of Grid-Forming Inverter Based on Hybrid Impedance Reshaping Strategy | 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 Harmonic Suppression Method of Grid-Forming Inverter Based on Hybrid Impedance Reshaping Strategy Liang Meng, Xuekai Hu, Lei Li, Yilin Yin, Wanjun Lei This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6301641/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 As a large number of power electronic devices and other nonlinear loads are connected to the power system, the harmonics generated by them cause great harm to the power quality of the power grid. At present, passive filter and active power filter are mainly used to deal with harmonic pollution. Active power filter is widely used, but its main control method for inverter is current mode control. However, the new energy power system shows the characteristics of inertia and insufficient damping. Therefore, the grid-forming inverter with the external characteristics of synchronous generator has attracted more and more attention, but the harmonic suppression strategy for the grid-forming inverter is rarely seen. In this paper, the author proposes a hybrid impedance reshaping strategy, which reduces the impedance of the grid-forming inverter at the harmonic frequency point through voltage feedback, and then series virtual negative impedance for the grid-forming inverter by modifying the voltage loop instruction, which equivalently increase the grid impedance, so that the grid-connected inverter can compensate the harmonics well in the normal working state. The proposed theory is proved by simulation and hardware-in-the-loop experiment. Grid-forming converter Impedance reshaping Harmonic suppression Virtual Impedance 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. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. 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-6301641","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":437395608,"identity":"fb9dc46c-74ef-4162-889e-baacf4373ae7","order_by":0,"name":"Liang Meng","email":"","orcid":"","institution":"State Grid Hebei Electric Power Research Institute","correspondingAuthor":false,"prefix":"","firstName":"Liang","middleName":"","lastName":"Meng","suffix":""},{"id":437395609,"identity":"12cf2b33-6c45-4f26-b678-4743f4d3bbd9","order_by":1,"name":"Xuekai Hu","email":"","orcid":"","institution":"State Grid Hebei Electric Power Research Institute","correspondingAuthor":false,"prefix":"","firstName":"Xuekai","middleName":"","lastName":"Hu","suffix":""},{"id":437395610,"identity":"560fbfad-87c4-4b9d-89d4-8ff15d4f8f96","order_by":2,"name":"Lei Li","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA50lEQVRIie3RsYrCQBCA4VkWNk24tCMHPsO0csF9lQmBXGNhJZaKkDTxYewsIwtWi9ce2MTmqissTadGEKs1peD+xcLAfkwxAD7fC/YRiHnN0/g2YfuymygpDdU2g7Al3ImorHfIzY1ANxISJvmP1sgKBycDUTAiaNZuQrzbJyWyJGQDvfKfxNK6CfNkzyGyqK+EfkckRe4mFaudvhCorkQ/JyqZcV6J8r4FnxJpgG2alPawIMy+Q7R/483SQaJgXjSn6VAHRbr9xPirHxXpqm4c5CExk5frt/epOoEWHTt/9fl8vnfqDEYAR9NuA8AeAAAAAElFTkSuQmCC","orcid":"","institution":"School of Electrical Engineering, Xi’an Jiaotong University","correspondingAuthor":true,"prefix":"","firstName":"Lei","middleName":"","lastName":"Li","suffix":""},{"id":437395611,"identity":"64b716f9-1f99-42e5-9810-26755cbbc8e5","order_by":3,"name":"Yilin Yin","email":"","orcid":"","institution":"School of Electrical Engineering, Xi’an Jiaotong University","correspondingAuthor":false,"prefix":"","firstName":"Yilin","middleName":"","lastName":"Yin","suffix":""},{"id":437395612,"identity":"1d9a21d5-9248-4195-a215-567e99b85afc","order_by":4,"name":"Wanjun Lei","email":"","orcid":"","institution":"School of Electrical Engineering, Xi’an Jiaotong University","correspondingAuthor":false,"prefix":"","firstName":"Wanjun","middleName":"","lastName":"Lei","suffix":""}],"badges":[],"createdAt":"2025-03-25 08:23:25","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-6301641/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-6301641/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":82989933,"identity":"4c4cff66-161c-463c-b7eb-0b2338f4a5ef","added_by":"auto","created_at":"2025-05-18 15:16:33","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":2165038,"visible":true,"origin":"","legend":"","description":"","filename":"Harmonic0324.pdf","url":"https://assets-eu.researchsquare.com/files/rs-6301641/v1_covered_64421358-123c-4e1a-86bc-6c1e9e0e4d63.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Harmonic Suppression Method of Grid-Forming Inverter Based on Hybrid Impedance Reshaping Strategy","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":"Grid-forming converter, Impedance reshaping, Harmonic suppression, Virtual Impedance","lastPublishedDoi":"10.21203/rs.3.rs-6301641/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-6301641/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eAs a large number of power electronic devices and other nonlinear loads are connected to the power system, the harmonics generated by them cause great harm to the power quality of the power grid. At present, passive filter and active power filter are mainly used to deal with harmonic pollution. Active power filter is widely used, but its main control method for inverter is current mode control. However, the new energy power system shows the characteristics of inertia and insufficient damping. Therefore, the grid-forming inverter with the external characteristics of synchronous generator has attracted more and more attention, but the harmonic suppression strategy for the grid-forming inverter is rarely seen. In this paper, the author proposes a hybrid impedance reshaping strategy, which reduces the impedance of the grid-forming inverter at the harmonic frequency point through voltage feedback, and then series virtual negative impedance for the grid-forming inverter by modifying the voltage loop instruction, which equivalently increase the grid impedance, so that the grid-connected inverter can compensate the harmonics well in the normal working state. 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