Capacity　of　wind　power　installed　in　grid　has　experienced　a　rapid　increase　in　recent　years　all　over　the　world.　Uncertain　wind　power　integration　has　important　effects　on　power　system　operations.　Discrete　time　based　average　power　model　is　usually　adopted　in　short-term　generation　scheduling　of　power　systems　which　can　result　in　an　imbalance　in　energy　delivery.　This　paper　proposes　a　method　to　minimize　the　wind　curtailment　and　to　analyze　the　wind　integration　capacity　from　an　energy　based　formulation　instead　of　the　usually　adopted　average　power　based　one.　The　method　is　based　on　an　exact　formulation　and　detailed　analysis　of　the　electrical　energy　produced　by　conventional　generators.　Then,　a　nonlinear　program　is　proposed　to　minimize　the　wind　curtailment.　Numerical　results　show　that　the　optimization　model　presented　in　this　paper　can　give　an　energy　based　assessment　of　the　wind　integration　capacity.