Translated Title

Calculation method research on transformer oil-paper insulation equivalent relaxation parameters

Translated Abstract

Time　domain　dielectric　response　method　is　a　nondestructive　detection　method　of　transformer　oil-paper　in-sulation　aging　diagnosis,and　the　model　on　transformer　insulation　equivalent　relaxation　mechanism　is　an　important　one.　At　present,the　number　of　relaxation　mechanism　in　the　modeling　process　of　the　equivalent　relaxation　mecha-nism　is　usually　determined　by　hypothesis　method,and　the　uncertainty　caused　by　test　error　and　precision　of　instru-ment　is　ignored　in　parameter　calculation,　which　has　the　characteristics　of　randomness　and　low　coincidence.　This　paper　presents　a　new　method　that　deepens　the　analysis　on　return　voltage　test　curves.　Firstly,　this　method　using　RVM　test　to　get　the　return　voltage　curve　of　the　transformer,and　then　select　the　end　of　curve　to　get　the　topological　information.　Secondly,according　to　the　topological　analysis　for　qiand　Gi,we　can　establish　the　parameter　equations　of　Rpiand　Cpi,considering　test　error　and　precision　of　instrument　in　the　calculation　of　small　range　by　using　interval　analysis　method　for　solving　the　mathematical　equations.　Finally,this　method　can　solve　the　problem　of　number　of　re-laxation　mechanism　based　on　the　measured　transformer　modeling　analysis,and　results　of　the　small　range　in　midpoint　parameter　compared　to　common　particle　swarm　algorithm　has　certain　improvement.　It　can　be　a　foundation　for　using　time　domain　dielectric　response　method　in　diagnosis　of　transformer　insulation　by　the　future.

Translated Keyword

aging state of oil-paper insulation
interval mathematics
nondestructive test
relaxa-tion mechanism parameter
RVM test
time domain dielectric response method

Classification

TM411

Type

Project Name

Project No.

Access Number

WF:perioarticaldgdn201803010

Language

Chinese

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