As　far　as　the　problem　of　high　voltage　transformation　in　wind　power　concerned,　a　module　of　transformerless　high　voltage　grid-connected　converter　based　on　carrier　phased-shift　control　strategy　is　proposed.　The　working　condition　of　cascaded　power　modules　is　elaborated,　and　the　analysis　of　four　operating　states　is　introduced　as　well　in　this　paper.　Furthermore,　with　the　technology　of　unipolar　dual-frequency　Carrier　Phase　shift　PWM　modulation　(CPS-SPWM),　the　corresponding　simulation　and　experiments　for　three　units　cascaded　converter　confirm　the　control　method＇s　effects.　©　2012　IEEE.