As　a　regional　power　grid　with　the　highest　penetration　of　renewable　energy,　the　China　Northwest　Power　Grid　is　now　facing　with　high　curtailment　of　renewable　energy,　caused　by　the　inefficient　energy　utilization,　the　serious　marketization　barriers　between　provinces　and　the　immature　market　mechanism.　To　address　these　problems,　this　paper　proposes　an　electricity　energy　pool　(EEP)　trading　applied　to　the　real-world　case　in　China　that　is　on　the　marketization　process.　Firstly,　the　EEP　trading　model　is　established,　based　on　the　economic　dispatch　model　in　two　provinces　whose　power　resources　are　complementary.　Secondly,　the　price　mechanism　of　the　EEP　is　made　up　of　two　parts:　system　marginal　price　calculation　and　settlement　of　the　unbalanced　electricity　(UE)　within　the　whole　month.　Then,　the　benefit　of　the　EEP　trading　is　presented　by　comparing　the　rate　of　the　curtailment　in　the　wind　and　solar　generation　whether　there　is　the　EEP　trading　between　the　Shaanxi　Power　Grid　and　the　Gansu　Power　Grid　from　day　to　month　to　year.　Finally,　the　monthly　UE　of　the　EEP　trading　and　its　price　are　calculated,　which　verifies　the　effectiveness　of　the　EEP　trading　and　its　price　mechanism.　©　2019　IEEE.