This　paper　presents　a　novel　fluctuating　rms　value　feedback　control　(FRFC)　for　the　cascaded　H-bridge　(CHB)　converter,　which　uses　the　output　voltage　sliding　window　rms　value　as　the　feedback　variable　and　the　fluctuating　signal　sliding　window　rms　value　as　the　reference　for　voltage　control.　The　proposed　strategy　can　easily　set　the　controller　parameter,　has　high　accuracy　in　the　output　voltage　fluctuation　and　frequency,　and　is　suitable　for　high　voltage　and　power　applications　in　real　industry.　Modeling　and　analysis　of　the　FRFC　is　elaborated　in　this　paper.　A　parameter　design　method　is　proposed　as　well.　Finally,　the　field　experimental　results　on　the　35　kV-　6　MW　wind　turbine　testing　prototype　sufficiently　verify　the　feasibility　and　effectiveness　of　the　proposed　FRFC.　According　to　the　experimental　results,　the　relative　error　of　the　fluctuating　output　voltage　is　less　than　2%　by　utilizing　the　proposed　FRFC.　©,　2015,　Chinese　Machine　Press.　All　right　reserved.