In　microgrid,　generators　are　generally　close　to　the　load　and　the　impedance　ratio　of　transmission　lines　is　relatively　large.　Bus　voltage　depends　on　the　active　power　flow　as　well　as　the　reactive　power　flow.　Also,　the　reactive　power　upper　limits　of　power　sources　are　subject　to　the　active　power.　An　active　and　reactive　power　joint　real-time　dispatch　approach　was　proposed　with　consideration　of　the　bus　voltage　constraint,　by　which　voltage　control　in　microgrid　was　achieved　in　process　of　real-time　economic　dispatch.　The　uncertainties　of　photovoltaic　and　wind　power　generations　were　represented　by　scenarios.　The　model　predictive　control　(MPC)　algorithm　was　used　for　the　receding　horizon　real-time　optimal　dispatch　and　voltage　control.　Case　studies　showed　that:　the　proposed　active　and　reactive　power　joint　dispatch　approach　can　always　keep　the　voltage　within　the　permitted　range.　Compared　with　the　active　and　reactive　power　independent　dispatch　approach,　the　economic　efficiency　and　voltage　quality　of　the　microgrid　are　both　improved　by　the　proposed　method.　©　2016　Chin.　Soc.　for　Elec.　Eng.