Large-capacity SVG closed-type air cooling system

Abstract

The invention discloses a large-capacity SVG closed-type air cooling system, and the system comprises an SVG power cabinet group, a heat exchange air handling unit, and a refrigeration set. The heat exchange air handling unit is provided with an air supply duct and a returned air duct, which are uniform in wind resistance. The SVG power cabinet group is disposed between the air supply duct and the returned air duct, and is communicated with the air supply duct and the returned air duct. The refrigeration set is connected with the heat exchange air handling unit. The SVG power cabinet group comprises a plurality of power cabinets which are connected in parallel. Each power cabinet is provided with an air inlet and an air outlet, which are symmetric. Each air inlet is communicated with the air supply duct, and each air outlet is communicated with the returned air duct. The system is high in heat dissipation efficiency, is high in adaptability, and is high in reliability.

Description

technical field [0001] The invention mainly relates to the field of electrical engineering, in particular to a large-capacity SVG closed air cooling system. Background technique [0002] With the rapid development of new energy power generation and UHV transmission technology, the demand for large-capacity dynamic reactive power compensation equipment in the power grid is becoming increasingly urgent. Among all kinds of equipment capable of quickly providing dynamic reactive power compensation, Static Synchronous Generator (SVG) has attracted widespread attention because of its fast dynamic response and small grid-connected harmonics. [0003] During the operation of SVG, due to the certain conduction voltage drop of the semiconductor switching device itself, about 1% of the active power loss will be generated during the operation of the SVG. Only by cooling the heat dissipation system can the SVG be overheated and damaged. [0004] At present, large-capacity SVGs generall...

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Problems solved by technology

[0004] At present, large-capacity SVGs generally use water cooling to dissipate heat. The water cooling method has high heat dissipation efficiency, but requires a large number of water inlet and outlet pipe joints, and there is a large risk of water leakage. Once water leakage will cause equipment insulation failure, the reliability is low.

The air-cooling method has no risk of water leakage, but the existing air-cooling method is currently only suitable for small-capacity SVGs with low heat generation density and small total heat generation due to low heat dissipation efficiency.

Moreover, the existing air-cooling method generally adopts the method of arranging cooling fans on each power cabinet body. Limited by the structure of the cabinet body and the structure of the air path, the fans cannot be redundantly configured.

Once the fan fails, the entire power cabinet will be shut down due to poor heat dissipation, which will lead to the shutdown of the entire SVG, and the reliability of the cooling system is poor

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