Converter device of MW (Megawatt) excitation wind power unit

Abstract

The invention discloses a converter device of an MW (Megawatt) excitation wind power unit, which comprises a converter unit cabinet, a machine side cabinet and a grid side cabinet; the converter unit cabinet comprises a rectifier unit, an inverter unit, a first centrifugal fan, a second centrifugal fan, a first water-cooled pipeline and a second water-cooled pipeline; a first IGBT (Insulated Gate Bipolar Translator) module and a first capacitance matrix in the rectifier unit are arranged on a first bottom plate; the first bottom plate and the front plate, the rear plate and a first side plate of the cabinet body form a first air duct; a second IGBT module and a second capacitance matrix in the inverter unit are arranged on a second bottom plate; the second bottom plate and the front plate, the rear plate and a second side plate of the cabinet body form a second air duct; the first bottom plate and the second bottom plate are over against each other and separated to form a gap between; the first and the second water-cooled pipelines are arranged in the gap between the first and the second bottom plates; and third water-cooled pipelines are respectively arranged in the grid side cabinet and the machine side cabinet to cool a first reactor and a second reactor. The converter device of the MW excitation wind power unit according to the embodiment of the invention has a compact structure, a small size and a good radiating effect.

Description

technical field [0001] The invention relates to the field of electronic converters, in particular to a converter device for a megawatt-level excitation wind turbine. Background technique [0002] As a clean and renewable energy, wind energy has been paid more and more attention by countries all over the world. my country is rich in wind energy resources. In recent years, national policies have vigorously supported the wind power industry. Domestic research and development of megawatt-scale wind power converters has also made relatively good progress. Big progress. [0003] In the application of megawatt-level converter devices, the volume and thermal power of the main circuit components are relatively large, such as high-power IGBT modules and reactors. All of these heating elements will increase the temperature of the device, resulting in poor performance and shorter life of the components inside the device. [0004] At present, the converter unit in the existing megawatt-...

AI Technical Summary

Problems solved by technology

The air cooling method is adopted, the system complexity is low, but the cooling effect is limited, and it is difficult to achieve an ideal heat dissipation effect for components with high heat generation such as high-power IGBT modules and reactors

Using water-cooling method for heat dissipation, the cooling effect is better than that of air-cooling method alone, but its heat dissipation effect is more concentrated, and it can only take away the heat of the components themselves, and has no cooling effect on the capacitor matrix that cannot be cooled by water cooling.

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