The　quantization　of　wind　power　value　is　critical　for　wind　power　development.　The　concept　of　node　marginal　value　of　wind　power　is　proposed.　Considering　the　influence　of　wind　power　on　energy　consumption,　emission,　reserve,　line　power　flow　and　system　power　loss,　a　more　comprehensive　marginal　value　evaluation　method　for　wind　power　is　proposed,　which　includes　five　parts　of　wind　power　energy　consumption　value,　environmental　value,　reserve　value,　network　transmission　value　and　power　loss　value.　An　improved　economic　dispatching　optimization　model　is　built,　which　takes　the　minimum　system　operation　cost　as　its　object.　The　model　is　linearized,　and　Lagrange　function　is　used　to　calculate　the　comprehensive　marginal　operation　value　of　wind　power.　The　influence　of　factors,　such　as　grid-connection　location,　wind　power　output　and　load　level,　etc.,　on　wind　power　value　is　analyzed　by　an　example,　and　the　results　verify　the　effectiveness　of　the　proposed　method.　©　2021,　Electric　Power　Automation　Equipment　Press.　All　right　reserved.