35 kv combined transformer used for photovoltaic power generation

Abstract

The invention relates to a 35 kV combined transformer used for photovoltaic power generation. The 35 kV combined transformer comprises a transformer body. A high-voltage operating chamber and a low-voltage chamber used for containing a first low-voltage cable and a second low-voltage cable are arranged below the transformer body respectively. A high-voltage cable chamber used for containing a high-voltage cable is arranged beside the transformer body. An axial double-split winding transformer is arranged in the transformer body, the axial double-split winding transformer comprises two low-voltage windings and a high-voltage winding connected to a fuse, and the two low-voltage windings are connected with one end of a breaker and one end of the other breaker respectively, and the other ends of the two breakers are connected with the first low-voltage cable and the second low-voltage cable. The first low-voltage cable and the second low-voltage cable are connected to loads through a first dry-type transformer and a second dry-type transformer. The fuse is further connected to the high-voltage cable through a load switch. The 35 kV combined transformer combines an axial double-split structure, and investment of electrical equipment such as transformers and building projects is saved.

Description

technical field [0001] The invention relates to a 35kV combined transformer for photovoltaic power generation. Background technique [0002] The traditional transformer structure adopts axial double-split structure or combined transformer. In the field of photovoltaic power generation, with the development of grid-connected photovoltaic power generation technology, large and medium-sized ground photovoltaic power stations usually use 1M Wp as a power generation unit module. Includes two 500kW inverters and one 1100kVA split transformer. If only a double-winding combined transformer is used, two identical 550kVA double-winding combined transformers must be purchased to meet the function of a split transformer, which increases the investment in electrical equipment and civil engineering. If a 1100kVA axial double-split oil-immersed transformer is simply used, it must be in the form of a prefabricated substation in order to combine the transformer, high and low voltage electri...

AI Technical Summary

Problems solved by technology

If a 1100kVA axial double-split oil-immersed transformer is simply used, it must be in the form of a prefabricated substation in order to combine the transformer, high and low voltage electrical equipment, etc., and the prefabricated substation occupies The land area is large, and transportation in place is difficult

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