This　study　considers　ISO　day-ahead　(DA)　scheduling　under　uncertain　conditions　with　demand　response　(DR).　Two　kinds　of　DR,　incentive-based　DR　(IDR)　and　price-based　DR　(PDR)　are　both　incorporated　according　to　their　response　characteristics.　A　bi-level　two-stage　stochastic　security-constrained　unit　commitment　(SCUC)　model　is　proposed　for　this　programme　to　minimise　the　ISO　cost　considering　uncertain　wind　power　output　and　uncertain　price　elasticity.　The　upper　level　is　a　two-stage　stochastic　programme.　The　first　stage　determines　unit　commitment　and　contract　capacity　of　IDR　programme　while　the　second　stage　determines　economic　dispatch,　wind　power　utilisation　and　actual　dispatch　power　of　IDR　programme　in　the　real-time　(RT).　A　chance-constraint　is　used　to　ensure　wind　power　utilisation.　In　the　lower　level,　a　priority　method　is　used　to　select　successful　bidders　based　on　the　calculated　contract　capacity　from　the　upper　level.　Results　on　the　revised　IEEE　118-bus　system　show　that,　the　ISO　would　avoid　frequent　rescheduling　and　economic　loss　with　uncertain　PDR　incorporated　into　the　model.　Besides,　with　IDR　flexibly　mitigating　uncertainty　and　volatility　from　wind　power　and　PDR,　the　ISO　would　have　lower　cost　and　avoid　frequent　rescheduling　of　thermal　units.　Also,　this　model　could　ensure　wind　power　utilisation,　thus　promoting　wind　power　integration.　©　2017　Institution　of　Engineering　and　Technology.　All　rights　reserved.