{"paper_id":"066ea2b4-2945-48b7-993c-fd49a92275d7","body_text":"Fuzzy separation droop control of microgrid inverter under unbalanced conditions | 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 Fuzzy separation droop control of microgrid inverter under unbalanced conditions liping fan, mingjun wang This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6244410/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 When the microgrid is connected to complex loads, power quality problems such as voltage deviation and waveform distortion will occur in the system. In order to improve the operation quality of microgrid under unbalanced conditions, a fuzzy droop control method based on positive and negative sequence separation is proposed for microgrid inverter. The positive and negative sequence components of voltage and current are extracted respectively by positive and negative sequence separation algorithm. The positive and negative sequence components of voltage and current are extracted respectively by positive and negative sequence separation algorithm to reduce the system error caused by unbalanced load. The active and reactive droop coefficients are adjusted in real time by fuzzy controller to suppress the influence of disturbance and uncertainty factors on control performance. results show that the fuzzy droop control method based on positive and negative sequence separation can well suppress the power fluctuation caused by load imbalance, and effectively improve the power efficiency. The results show that the fuzzy droop control method based on positive and negative sequence separation can well suppress the power fluctuation caused by load imbalance, and effectively improve the rapidity, stability and accuracy of the system response. microgrid inverter control positive and negative sequence separation fuzzy control droop 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. 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. 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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-6244410\",\"acceptedTermsAndConditions\":true,\"allowDirectSubmit\":true,\"archivedVersions\":[],\"articleType\":\"Research Article\",\"associatedPublications\":[],\"authors\":[{\"id\":444778884,\"identity\":\"879f2328-d8e2-4f36-bd4b-bc4b876964e9\",\"order_by\":0,\"name\":\"liping fan\",\"email\":\"\",\"orcid\":\"\",\"institution\":\"\",\"correspondingAuthor\":false,\"prefix\":\"\",\"firstName\":\"liping\",\"middleName\":\"\",\"lastName\":\"fan\",\"suffix\":\"\"},{\"id\":444778885,\"identity\":\"ac40213c-8a1c-4c5f-86b5-f8ba21b4a081\",\"order_by\":1,\"name\":\"mingjun wang\",\"email\":\"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAuElEQVRIiWNgGAWjYHCCBAYGHgYGfmbmww9I0yLZzpZmQJpdBud5FCSIU3ntwDOpGzKHEzcf5mEwYKixiSas5XZCmnQOT5qx2WHeAw8YjqXlNhDSYgbUcjuHx0bO7DBfggFjw2GitUjwGDfzGEiQosVGzoCZWC32txPSf4P8InEYGMgJxPhFcnZOsnFuz+HE/v7Dhx98qLEhrAUYjQkMjD1QdgJh5SDAfoCB4QdxSkfBKBgFo2CEAgDJnD1hvihr3AAAAABJRU5ErkJggg==\",\"orcid\":\"\",\"institution\":\"\",\"correspondingAuthor\":true,\"prefix\":\"\",\"firstName\":\"mingjun\",\"middleName\":\"\",\"lastName\":\"wang\",\"suffix\":\"\"}],\"badges\":[],\"createdAt\":\"2025-03-17 12:08:26\",\"currentVersionCode\":1,\"declarations\":\"\",\"doi\":\"10.21203/rs.3.rs-6244410/v1\",\"doiUrl\":\"https://doi.org/10.21203/rs.3.rs-6244410/v1\",\"draftVersion\":[],\"editorialEvents\":[],\"editorialNote\":\"\",\"failedWorkflow\":false,\"files\":[{\"id\":92501557,\"identity\":\"87ce042f-a0d8-4969-86b0-634786553906\",\"added_by\":\"auto\",\"created_at\":\"2025-09-30 11:32:08\",\"extension\":\"pdf\",\"order_by\":1,\"title\":\"\",\"display\":\"\",\"copyAsset\":false,\"role\":\"manuscript-pdf\",\"size\":717821,\"visible\":true,\"origin\":\"\",\"legend\":\"\",\"description\":\"\",\"filename\":\"1.pdf\",\"url\":\"https://assets-eu.researchsquare.com/files/rs-6244410/v1_covered_e74a186e-d4b9-487e-ab53-794e4157224d.pdf\"}],\"financialInterests\":\"No competing interests reported.\",\"formattedTitle\":\"Fuzzy separation droop control of microgrid inverter under unbalanced conditions\",\"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\":\"info@researchsquare.com\",\"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\":\"microgrid, inverter control, positive and negative sequence separation, fuzzy control, droop control\",\"lastPublishedDoi\":\"10.21203/rs.3.rs-6244410/v1\",\"lastPublishedDoiUrl\":\"https://doi.org/10.21203/rs.3.rs-6244410/v1\",\"license\":{\"name\":\"CC BY 4.0\",\"url\":\"https://creativecommons.org/licenses/by/4.0/\"},\"manuscriptAbstract\":\"\\u003cp\\u003eWhen the microgrid is connected to complex loads, power quality problems such as voltage deviation and waveform distortion will occur in the system. In order to improve the operation quality of microgrid under unbalanced conditions, a fuzzy droop control method based on positive and negative sequence separation is proposed for microgrid inverter. The positive and negative sequence components of voltage and current are extracted respectively by positive and negative sequence separation algorithm. The positive and negative sequence components of voltage and current are extracted respectively by positive and negative sequence separation algorithm to reduce the system error caused by unbalanced load. The active and reactive droop coefficients are adjusted in real time by fuzzy controller to suppress the influence of disturbance and uncertainty factors on control performance. results show that the fuzzy droop control method based on positive and negative sequence separation can well suppress the power fluctuation caused by load imbalance, and effectively improve the power efficiency. 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