Single-phase ultra-high-capacity nuclear power station transformer

Abstract

The invention relates to a single-phase ultra-high-capacity generator transformer. The single-phase ultra-high-capacity generator transformer is provided with high-voltage bushings, low-voltage bushings, high-voltage neutral point bushings, an oil storage cabinet, an upper oil-saving tank, a lower oil-saving tank, cooling devices and a no-load switch; each of the upper oil-saving tank and the lower oil-saving tank is internally provided with a single-phase four-column iron core structure; a high-voltage winding and a low-voltage winding are respectively sheathed on two main column iron cores of each single-phase four-column iron core, and the high-voltage winding and the low-voltage winding of two main columns of the iron core are connected in parallel; the outlet heads of the low-voltagewindings of the two main columns are arranged at the upper ends and are connected by copper bars to form a low-voltage dual-column parallel connection structure; the oil storage cabinet is arranged above the upper oil-saving tank at the side opposite to the high-voltage bushings; the cooling devices are arranged at the outer sides of one sides of the upper oil-saving tank and the lower oil-savingtank, which are provided with the high-voltage bushings and the high-voltage neutral point bushings, and are parallel to the direction of the long axis of the transformer; and the no-load switch is arranged at the low-voltage side of the transformer. The single-phase ultra-high-capacity generator transformer provided by the invention has the advantages of compact whole structure, reduced outer limit size, low loss, low noise and good shielding effect, and the partial overheat is prevented effectively; meanwhile, the support structure of the oil storage cabinet is more reasonable.

Description

technical field [0001] The invention relates to the technical field of transformer manufacturing, in particular to a single-phase ultra-large-capacity generator transformer used in large nuclear power plants. Background technique [0002] The most advanced third-generation nuclear power technology in the world, France's EPR1000 technology is becoming increasingly mature and has been gradually applied to new nuclear power plant projects. At present, there is no nuclear power plant operating performance using this technology in the world, only nuclear power plants under construction using this technology. In the world, only three nuclear power plants under construction in China, France and Finland have adopted the French EPR1000 technology. Since the single-unit power generation of the French EPR1000 nuclear power technology reaches 1.75 million kW, which is significantly higher than the single-unit power generation of the second-generation nuclear power technology of 1 milli...

AI Technical Summary

Problems solved by technology

However, the mature manufacturing and operation technology of single-phase 700MVA / 500kV transformers at home and abroad have not been reported yet.

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