Closed converter valve external cooling system and method based on soil source heat exchange

Abstract

The invention discloses a closed converter valve external cooling system and method based on soil source heat exchange. A cooling system comprises an intermediate heat exchanger for transmitting heatof an internal cooling system to the external cooling system; and the external cooling system is internally provided with an underground heat exchanger; a heat transfer medium, receiving heat generated by the internal cooling system, of the intermediate heat exchanger is transmitted to the underground heat exchanger, the underground heat exchanger discharges the system heat load brought by the heat transfer medium to the ground, and the cooled heat transfer medium is injected into the intermediate heat exchanger to be circulated. The intermediate heat exchanger is adopted to cool a circulationcooling working medium of the internal cooling system, the heat transfer medium receiving the heat is transmitted to the underground heat exchanger, the underground heat exchanger discharges the system heat load to the ground, and soil in the ground is utilized as a natural cooling medium; and compared with a cooling mode of a water cooling tower, water resources are greatly saved, the occupied area of equipment on the ground is greatly decreased compared with that of an air cooler, and the equipment operation noise is reduced.

Description

technical field [0001] The invention belongs to the field of converter valve cooling, and relates to a closed converter valve external cooling system and method based on soil source heat exchange. Background technique [0002] The converter valve is the core equipment for the conversion of AC and DC power in the converter station. The heat generated by the thyristor inside the converter valve due to power loss during operation will cause the temperature of the thyristor chip to rise. Once the maximum junction temperature of the thyristor is exceeded, the thyristor will It will be damaged, so the converter valve needs to use a cooling medium to circulate heat and cool down. The converter valve cooling system is divided into two parts: internal cooling and external cooling. The cooling medium of the internal cooling system usually uses deionized water or ionized water added with ethylene glycol to absorb the heat emitted by the diverter valve in operation to maintain the norm...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a closed converter valve external cooling system based on soil source heat exchange and method, avoiding the limitation of water resource shortage in the water-cooling method, and at the same time, it has the characteristics of small equipment footprint, no noise in operation, and convenient maintenance and management.

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