The present invention relates to a fault-tolerant control system for a wind power plant comprising a plurality of power units, the control system comprising control means for generating a replica of essentially concurrent power unit set-point values, a data communication network for transmitting the essentially concurrent power unit set-point values to the plurality of power units and a plurality of decentralised voting means being arranged so that a decentralised voting means is assigned to each power unit, each decentralised voting means being adapted to select one power unit set-point value out of the replica of power unit set-points. The present invention further relates to an associated method.