Grid-side filtering cabinet and converter

Abstract

The invention provides a grid-side filtering cabinet and a converter. The grid-side filtering cabinet comprises a cabinet body formed by a plurality of support frames, an intermediate charging circuit, a chopping module, a filtering unit, switch units and a protection unit. The intermediate charging circuit, the protection unit, the chopping module and the filtering unit are arranged in an upper right cavity in an inner cavity of the cabinet body, the filtering unit is also arranged in a left upper cavity in the inner cavity of the cabinet body and is also arranged in a right lower cavity in the inner cavity of the cabinet body, and the switch units are respectively arranged in the left lower cavity and the right lower cavity in the inner cavity of the cabinet body. According to the grid-side filtering cabinet and the converter provided by the invention, the intermediate charging circuit, the chopping module, the filtering unit, the switch units and the protection unit are compactly integrated in the grid-side filtering cabinet, so that the overall structure of the converter is more compact, the space is saved, and the electronic components in the grid-side filtering cabinet are convenient to maintain through the reasonable layout.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a grid-side filtering cabinet and a converter. Background technique [0002] At present, the mainstream of offshore wind turbines is 3-5MW, generally greater than 4MW, and the largest is 8MW. With the development of my country's offshore wind power construction from the intertidal zone to the offshore direction, due to the consideration of cost and operation and maintenance, the wind turbine unit capacity of 4.0MW and above will become a long-term trend. It can be seen from the situation of foreign offshore wind turbine assembly High-power wind turbines are gradually increasing, for example, wind turbines can reach 6MW, 7MW and 8MW, and all of them have entered the stage of commercial operation, and 10MW wind turbines also have experimental prototypes. [0003] The wind power field has relatively high requirements for harmonics. Generally, a corresponding filter dev...

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Problems solved by technology

[0004] However, in the prior art, it is usually considered from the design of the converter. The conventional design of the converter generally arranges the filter unit in the grid-side filter cabinet, the components in the switch unit are arranged in the switch cabinet, and the middle The charging circuit and chopper module are arranged in the chopper cabinet. This design will increase the width of the converter. At the same time, the filter cabinet on the grid side is generally arranged next to the power cabinet on the grid side, and the switch cabinet is on the far side. , so that the way of arranging each cabinet body in a line will make it difficult to remove the sinusoidal reactor in the grid-side power cabinet for maintenance, resulting in difficult maintenance

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