Novel frequency conversion driving system of boiler water feeding pump of large power unit of power plant

The utility model discloses a novel frequency conversion driving system of a boiler water feeding pump of a large power unit of a power plant, comprising: at least one high-voltage large capacity frequency conversion device capable of implementing speed regulation in whole process of a boiler water feeding pump group; at least one large capacity synchronous high-speed motor of which two sides respectively extend out a group of interfaces, wherein one group directly drives the water feeding pump while the other group directly drives a reduction box; at least one set of motor rotor position detection device; at least one reduction box for reducing rotation speed of the synchronous motor according to certain proportion to drive a booster pump; and at least one booster pump forming the water feeding pump group with the water feeding pump. Moreover, the boiler water feeding pump also can be a water feeding pump having an inducer structure, so that the reduction box and the booster pump are not necessary. The frequ