The invention relates to a power-generating interconnected topological structure of a transformerless water-
turbine generator, which comprises a water-
turbine generator set, a high-
voltage rectifying topology, a direct-current
bus and an inverting topology, wherein the high-
voltage rectifying topology comprises a plurality of high-
voltage rectifying modules, the inverting topology comprises a plurality of inverting modules, the high-voltage
alternating current with any frequency generated by each water-
turbine generator is rectified by the high-voltage rectifying topology to obtain a direct-current
high voltage, the generated direct-current high voltages are connected together and collected onto the direct-current
bus, the voltage on the direct-current
bus is used as the direct-current side voltage of the inverting topology, and the direct-current side voltage is inverted into an alternating-
current voltage by the inverting topology to generate a
high voltage to be connected to a
power grid. The invention has the advantages that: no
transformer exists at an input end, thereby the equipment investment is saved, and the waterpower generation efficiency is greatly improved. The
transformer does not exist at the input end, so that the volume of a waterpower-generating interconnected topology is reduced, the occupied land is reduced, the weight is lightened, and the cost is lowered; and meanwhile, the
energy consumption can be lowered, so that the manufacturing process is simplified, and the production period is reduced.