Combined transformer of wind generating set

Abstract

The invention discloses a combined transformer of a wind generating set. The combined transformer comprises single-phase transformers, a high-voltage switch cabinet and a low-voltage switch cabinet, wherein the single-phase transformers comprise a first single-phase transformer, a second single-phase transformer and a third single-phase transformer, the first single-phase transformer, the second single-phase transformer and the third single-phase transformer are uniformly arranged at the periphery of a fan tower, the first single-phase transformer, the second single-phase transformer and the third single-phase transformer are connected to form a Dyn11 connection group, one end of the high-voltage switch cabinet is connected with a high-voltage winding of the single-phase transformers, theother end is connected with a power transmission line, one end of the low-voltage switch cabinet is connected with a low-voltage winding of the single-phase transformers, and the other end is connected with the fan generator. The combined transformer is advantaged in that the single-phase transformers are uniformly arranged on the periphery of the fan tower, so the capacity of the transformers isnot limited by the space in the fan tower, the bottom section of the fan tower can be uniformly stressed, and the transformers are arranged on the periphery of the fan tower, so the transformers are better in heat dissipation performance and more convenient to maintain.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a combined transformer of a wind power generating set. Background technique [0002] At present, my country's wind power industry can be divided into two categories: onshore wind power and offshore wind power according to different types of construction sites. As a clean and green energy, wind power has developed rapidly in my country. , the utilization and investment of offshore wind resources will continue to rise, and offshore wind power is expected to become the dominant wind power generation in my country in the future. Usually the location of the wind farm is far away from the load center, especially the offshore wind power, the distance is tens of kilometers, and the distance is hundreds of kilometers. Due to the low voltage level of the electric energy generated by the wind turbine, in order to transmit the electric energy to a longer distance, it is necessa...

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Problems solved by technology

[0006] The main purpose of the present invention is to provide a combined transformer for wind power generators to solve the problems that the capacity of the transformer installed in the wind turbine tower is restricted by the inner space of the tower, the transformer has poor heat dissipation performance, and the cost of investment and maintenance is high.

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