Heat dissipation device and method for oil-immersed electrical equipment without moving parts

Abstract

The invention discloses an oil-immersed electrical equipment heat dissipation device and method without moving parts, and the method comprises the steps: arranging two water cooling cavities at the two sides of a transformer, and cooling the transformer oil in the transformer through the water cooling cavities; the refrigerating system provides cooling water for the water cooling cavity and recovers warm water after heat exchange; real-time temperature data in the transformer is obtained, the real-time temperature data is compared with preset temperature information, and the preset temperature of cold water at an outlet of the refrigerating system is adjusted according to the comparison result of the real-time temperature information in the transformer and the preset temperature information; and according to the preset temperature of the cold water at the outlet of the refrigerating system, the cold water circulation speed and the refrigerant flow in the refrigerating system are adjusted. On the premise that the heat dissipation requirement is met, a runner of the radiator is omitted, the oil flow speed in the transformer is greatly reduced, and therefore the risk that foreign matter exists in transformer oil is reduced, and the probability that particles in the oil enter key parts of the transformer is reduced.

Description

technical field [0001] The invention relates to the field of heat dissipation method design for electrical equipment, in particular to an oil-immersed electrical equipment heat dissipation device and method without moving parts. Background technique [0002] The transformer plays a very important role in the power system, and its safe operation is closely related to whether the power grid can operate efficiently and safely. Once a transformer fails, it will bring huge economic losses to the power grid and have a huge impact on people's lives. In order to ensure the long-term safe and reliable operation of the transformer, the temperature of the transformer must be controlled within a certain range. At present, the common heat dissipation method of oil-immersed transformers is fin radiator. For some transformers with higher voltage levels, strong oil air cooling is required to meet the heat dissipation requirements. The cooling method of strong oil air cooling uses the subm...

AI Technical Summary

Problems solved by technology

The cooling method of strong oil air cooling uses the submersible oil pump as the main power component, which drives the transformer oil to flow out from the transformer box into the refrigeration system and then returns to the transformer box, which makes the entire cooling cycle have a large oil flow rate. This also increases the probability of foreign matter in the transformer oil and the risk of foreign matter entering key parts of the transformer and causing partial discharge

Existing test results have shown that submersible pump shut down due to foreign matter entering the shaft, submersible pump blades break / fall off, and repeated circulation of transformer oil causes the particle size in the oil to increase, etc., which are some common failure forms of transformers.

Images