sf 6 Tray-type main transformer cooling device in direct contact with oil and its application method

Abstract

The invention provides a tower-plate main transformer cooling device enabling SF6 (sulfur hexafluoride) to be directly contacted with oil and an application method of tower-plate main transformer cooling device. The tower-plate main transformer cooling device comprises a transformer main body with transformer cooling oil and a tower-plate heat exchanger, wherein the side wall of the upper part of the transformer main body is provided with a main transformer oil outlet valve, a plurality of layers of tower plates are arranged in the tower-plate heat exchanger, each tower plate is provided with a leak hole, the top of the tower-plate heat exchanger is connected with a main transformer oil outlet, the bottom of the tower-plate heat exchanger is provided with an oil outlet, the side wall of the lower part of the transformer main body is provided with a main transformer oil inlet valve, and the oil outlet of the tower-plate heat exchanger is connected with the main transformer oil inlet valve through a backflow pipe. By utilizing SF6 medium and the characteristic that the SF6 medium cannot be dissolved in the transformer oil, cycling transformer oil is directly contacted with low-temperature evaporated SF6 liquid in the reverse direction in a reverse contact manner to exchange the heat so as to cool the transformer oil. Compared with the traditional main transformer cooling way, the tower-plate main transformer cooling device is high in cooling efficiency, large in cooling control range, capable of greatly reducing the loss of copper and iron of the main transformer, safer and more reliable.

Description

technical field [0001] The present invention relates to a kind of SF 6 A tray type main transformer cooling device in direct contact with oil and its application method. Background technique [0002] During the operation of the main transformer, due to the action of electricity and magnetism, its coil and iron core will generate heat, and the higher the temperature, the more unfavorable the operation of the main transformer, and the higher the copper and iron losses of the main transformer. If this heat is taken away, it will cause serious accidents such as burning of the main transformer or even explosion. Therefore, the coil and iron core must be cooled by the transformer oil flow filled in the main transformer, and the heat carried away by the transformer oil flow needs to be heated by a heat sink. After exchange, the cooled cold oil flow enters the main transformer body for cooling. Traditional transformer cooling methods mainly include forced air cooling, natural air ...

AI Technical Summary

Problems solved by technology

Traditional 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 transformer in the cooling system, even if it is a small leak, it will cause Serious consequences; due to the low air enthalpy and the influence of ambient temperature and weather, the cooling efficiency of the transformer is low, the cooling control range is small, the operating condition of the main transformer is poor, and the manufacturing volume of the transformer and radiator equipment is large, and the oil consumption Disadvantages such as large quantity, high operating cost, and large maintenance

Images