Aiming　at　the　problems　of　heavy　monitoring,less　application　and　no　interaction　in　the　current　voltage　sag　related　systems,a　voltage　sag　interactive　platform　of　provincial　power　grid　based　on　multi-source　data　fusion　is　constructed.　Firstly,the　functional　system　and　overall　architecture　of　the　platform　are　designed　according　to　the　actual　needs　of　power　supply　companies,sensitive　users　and　governance　manufacturers.　Secondly,the　association　and　feature　extraction　of　multi-source　data　are　realized　by　establishing　the　bus　association　mapping　table　and　the　whole　network　sag　feature　database.　Thirdly,on　the　basis　of　multi-source　data　fusion,the　functions　of　voltage　sag　severity　assessment,risk　early　warning,real-time　perception　and　rapid　positioning,auxiliary　governance　decision-making　and　so　on　are　realized.　Finally,the　information　sharing　and　interaction　mechanism　of　voltage　sag　management　participants　and　the　cooperative　prevention　and　control　system　of　voltage　sag　are　established.　At　present,the　proposed　platform　has　been　put　into　practical　application　in　a　provincial　power　grid　and　reflects　well.　©　2023　Electric　Power　Automation　Equipment　Press.　All　rights　reserved.