Networking strategy of small hydropower micro network under weak communication conditions

Networking strategy of small hydropower micro network under weak communication 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 Networking strategy of small hydropower micro network under weak communication conditions Zifan Zhang, Zhanhong LIANG, Yuan TANG, Zhifeng CHEN, NA SHEN, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-5244412/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 A microgrid with small hydropower as the main power source can absorb or transmit power to the main grid during grid-connected operation. When the microgrid is operating off-grid due to sudden reasons such as line faults, it is necessary to remove power sources or loads to maintain the frequency stability of the microgrid. Due to the difficulty of achieving high-quality communication in mountainous areas where small hydropower is concentrated, a common solution is to use high-frequency generation tripping or low-frequency load shedding without communication. This traditional solution has a poor control effect on the frequency of isolated microgrids. In response to this research situation, this article proposes a strategy of "centralized decision-making by the master station + local control by the substation" to determine the power sources and loads that need to be removed to achieve frequency stability during sudden off-grid operations of small hydropower microgrids under weak communication conditions. This article first theoretically analyzes the frequency change mechanism after the islanding of small hydropower microgrids, and proposes a strategy of "centralized decision-making by the master station + local control by the substation". The master station makes decisions on load shedding and generation tripping based on regional power flow data, and the substation controls locally based on local information combined with instructions from the master station. A mathematical model for decision-making problems is established, and a heuristic algorithm is used to obtain the optimal solution. To verify the effectiveness of the strategy, this article establishes a simulation model of small hydropower microgrids based on an electromagnetic transient simulation platform and compares traditional strategies with those proposed in this article. The results show that the proposed load-shedding scheme can achieve fast and accurate removal of remaining unit capacity and maintain frequency stability during sudden off-grid operations of small hydropower microgrids. Small hydropower Island operation Microgrid Frequency Weak communication 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-5244412","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":366690087,"identity":"b91c495e-be31-4427-a444-d5859ba1cd0b","order_by":0,"name":"Zifan Zhang","email":"","orcid":"","institution":"Guangzhou City University of Technology","correspondingAuthor":false,"prefix":"","firstName":"Zifan","middleName":"","lastName":"Zhang","suffix":""},{"id":366690088,"identity":"5f8fb9fb-d0e0-4f50-8966-74cb339b3e87","order_by":1,"name":"Zhanhong LIANG","email":"","orcid":"","institution":"City University of Hong Kong","correspondingAuthor":false,"prefix":"","firstName":"Zhanhong","middleName":"","lastName":"LIANG","suffix":""},{"id":366690089,"identity":"d59eee02-7c32-42c4-ac88-5fb7b144f69c","order_by":2,"name":"Yuan TANG","email":"","orcid":"","institution":"South China University of Technology","correspondingAuthor":false,"prefix":"","firstName":"Yuan","middleName":"","lastName":"TANG","suffix":""},{"id":366690090,"identity":"214276d4-914c-47cf-bd9a-86fb90eb13bd","order_by":3,"name":"Zhifeng CHEN","email":"","orcid":"","institution":"Guangzhou City University of Technology","correspondingAuthor":false,"prefix":"","firstName":"Zhifeng","middleName":"","lastName":"CHEN","suffix":""},{"id":366690091,"identity":"73d6b4ec-665c-4c5d-8820-60a84ad4811b","order_by":4,"name":"NA SHEN","email":"","orcid":"","institution":"Guangzhou City University of Technology","correspondingAuthor":false,"prefix":"","firstName":"NA","middleName":"","lastName":"SHEN","suffix":""},{"id":366690092,"identity":"afaca2a1-e231-4412-8d97-c56f622c5817","order_by":5,"name":"Danlan WU","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAwElEQVRIiWNgGAWjYHACAwaGAgYGNvbGxocfiNcCRHw8h5uNJUjSIieR3ibAQ5T6G8kbPxcY2OWxST5sY5BgsJPTbSCoJa1YeoZBcjGbdGLbgwKGZGOzAwS0mN3IMZDmMWBObJNObDeQYDiQuI0ILca/eQzqE9skD7ZJ8BCpxQxoy+HENglGIrXYn3lWZs1jcDyxjScRGMgGRPhFsj15822eiurE+e3HHz78UGEnR1ALGjAgTfkoGAWjYBSMAhwAADt1PfWd20H3AAAAAElFTkSuQmCC","orcid":"","institution":"Macau University of Science and Technology","correspondingAuthor":true,"prefix":"","firstName":"Danlan","middleName":"","lastName":"WU","suffix":""}],"badges":[],"createdAt":"2024-10-11 08:08:12","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-5244412/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-5244412/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":69269097,"identity":"a0f506d8-03af-4fe9-ab4f-eb8ebcba599a","added_by":"auto","created_at":"2024-11-18 15:02:22","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":612399,"visible":true,"origin":"","legend":"","description":"","filename":"Networkingstrategyofsmallhydropowermicronetworkunderweakcommunicationconditions.pdf","url":"https://assets-eu.researchsquare.com/files/rs-5244412/v1_covered_204d7812-84f3-44a2-ad6f-a0277c4a9396.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Networking strategy of small hydropower micro network under weak communication 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":"[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":"Small hydropower, Island operation, Microgrid, Frequency, Weak communication","lastPublishedDoi":"10.21203/rs.3.rs-5244412/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-5244412/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eA microgrid with small hydropower as the main power source can absorb or transmit power to the main grid during grid-connected operation. When the microgrid is operating off-grid due to sudden reasons such as line faults, it is necessary to remove power sources or loads to maintain the frequency stability of the microgrid. Due to the difficulty of achieving high-quality communication in mountainous areas where small hydropower is concentrated, a common solution is to use high-frequency generation tripping or low-frequency load shedding without communication. This traditional solution has a poor control effect on the frequency of isolated microgrids. In response to this research situation, this article proposes a strategy of \"centralized decision-making by the master station + local control by the substation\" to determine the power sources and loads that need to be removed to achieve frequency stability during sudden off-grid operations of small hydropower microgrids under weak communication conditions. This article first theoretically analyzes the frequency change mechanism after the islanding of small hydropower microgrids, and proposes a strategy of \"centralized decision-making by the master station + local control by the substation\". The master station makes decisions on load shedding and generation tripping based on regional power flow data, and the substation controls locally based on local information combined with instructions from the master station. A mathematical model for decision-making problems is established, and a heuristic algorithm is used to obtain the optimal solution. To verify the effectiveness of the strategy, this article establishes a simulation model of small hydropower microgrids based on an electromagnetic transient simulation platform and compares traditional strategies with those proposed in this article. The results show that the proposed load-shedding scheme can achieve fast and accurate removal of remaining unit capacity and maintain frequency stability during sudden off-grid operations of small hydropower microgrids.\u003c/p\u003e","manuscriptTitle":"Networking strategy of small hydropower micro network under weak communication conditions","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2024-10-18 06:02:59","doi":"10.21203/rs.3.rs-5244412/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","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}}],"origin":"","ownerIdentity":"2e99936c-3c17-46c3-8f47-fd8e1a1b7662","owner":[],"postedDate":"October 18th, 2024","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2024-11-18T14:54:10+00:00","versionOfRecord":[],"versionCreatedAt":"2024-10-18 06:02:59","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-5244412","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-5244412","identity":"rs-5244412","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}