A main transformer falling film heat exchange device with photovoltaic conversion function and its use method

Abstract

The invention provides a main transformer falling film heat exchange device with photovoltaic conversion function and its use method. Photovoltaic conversion systems for energy storage provide energy. The device performs heat exchange through the falling film tube wall of the falling film evaporator, and the control system can automatically control the transformer oil in the tube side of the falling film evaporator to form a film and flow down the inner wall of the falling film tube to increase the heat exchange effect And according to the oil temperature in the transformer body, the work of the variable frequency refrigeration compressor and the variable frequency oil pump is automatically controlled, and the optimal value of the temperature difference between the main transformer winding and the oil flow is always maintained. The invention makes full use of clean, efficient and safe energy such as solar energy as the normal working electric energy, which has great advantages such as energy saving and environmental protection, high cooling efficiency, small equipment volume, less oil consumption, less maintenance, overall operation economy, etc., and can greatly reduce Run the copper and iron losses of the main transformer, improve the overload capacity and short-circuit current resistance of the main transformer, prolong the service life of the main transformer, and more effectively guarantee the safe operation of the main transformer.

Description

technical field [0001] The invention relates to a falling-film heat exchange device for a main transformer with a photovoltaic conversion function and a use method thereof. Background technique [0002] During the operation of the main transformer, due to the action of electricity and magnetism, its winding and iron core will generate heat. If the heat cannot be taken away in time, it will cause serious accidents such as burning or even explosion of the main transformer. The transformer oil flows to cool the winding and iron core, and the heat taken away by the transformer oil flow needs to be exchanged through the cooling device, and the cooled cold oil flow enters the main body of the transformer for cooling. Traditional main transformer cooling methods mainly include forced air cooling, natural air cooling and water cooling. Although water cooling is economical and efficient, if cooling water leaks into the main transformer in the cooling system, even if it is a small lea...

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Problems solved by technology

Traditional main transformer cooling methods mainly include forced air cooling, natural air cooling and water cooling. Although water cooling is economical and efficient, if cooling water leaks into the main transformer in the cooling system, even if it is a small leak, It will lead to serious consequences; due to the low heat enthalpy of air, the cooling efficiency of the main transformer is low, the cooling range is small, and it is greatly affected by environmental factors. , a large amount of maintenance, and many shortcomings such as large copper and iron losses of the main transformer, small overload capacity and short-circuit resistance capacity, and short insulation life

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