Connecting structure of wind turbine generator cabin and dry-type transformer

Abstract

The invention discloses a connecting structure of a wind turbine generator cabin and a dry-type transformer. The connecting structure comprises a cabin base, the dry-type transformer, a first elastic supporting piece, a box transformer substation base and a cable-stayed assembly. The bottom of the dry-type transformer is connected with a cabin base through a first elastic supporting piece and a box transformer substation base, a support is arranged on the cabin base, the top of the dry-type transformer is connected with the top of the support through a cable-stayed assembly, and installation of the dry-type transformer in a wind turbine generator cabin is completed. According to the connecting structure of the wind turbine generator cabin and the dry-type transformer, the top and the bottom of the dry-type transformer are both flexibly connected with the cabin through the elastic supporting pieces and the cable-stayed assemblies, connection and fixation of the dry-type transformer and the cabin are achieved, and a certain flexible adjusting space can be provided for the dry-type transformer; therefore, the dry-type transformer can work safely, reliably and stably in a dynamic environment of a cabin.

Description

technical field [0001] The invention mainly relates to the technical field of wind power equipment, in particular to a connection structure between a wind power generator nacelle and a dry-type transformer. Background technique [0002] The function of the doubly-fed wind turbine generator transformer is to boost the 690V electric energy output by the generator located in the wind turbine cabin and transmit it to the grid. With the advent of the evaluation era of the wind power industry, the layout of the doubly-fed wind turbine transformer located outside the bottom of the tower mainly has the following problems: [0003] 1) The generator is in the engine room on the top of the tower, and the converter is on the platform at the bottom of the tower. As the tower rises gradually, some towers have reached 160m, resulting in longer and longer cables between the generator and the converter. The power loss is getting bigger and bigger, and the cable cost is getting higher and hi...

AI Technical Summary

Problems solved by technology

[0003] 1) The generator is in the engine room at the top of the tower, and the converter is on the platform at the bottom of the tower. As the tower rises gradually, some towers have reached 160m, resulting in longer and longer cables between the generator and the converter. The power loss is getting bigger and bigger, and the cable cost is getting higher and higher;

[0004] 2) With the gradual increase of the unit capacity of doubly-fed wind turbines, 6MW / 8MW single-unit wind turbines have appeared on the market, resulting in more and more 690V cables between the generator and the converter, resulting in torsion at the saddle bridge. Difficulties in cable and uncable and sharp increase in cable fixing costs in the tower;

[0005] 3) As distributed wind turbines are more and more widely used, they are not only arranged in sparsely populated places such as mountainous areas and grasslands, but also in the suburbs or urban areas where personnel are stationed. The area requirements are becoming more and more stringent, and the demand for additional land acquisition for the installation of the original oil-immersed transformer is becoming more and more difficult to meet, and the cost of land acquisition has risen sharply;

[0006] 4) The transformer (booster system) is located outside the bottom of the tower, and the additional cost in terms of operation and maintenance, fire prevention, theft prevention, and blade falling ice damage prevention is relatively high

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