A main transformer jacket type cooling device and method using SF6 as the cooling medium

Abstract

The invention relates to a jacket-type cooling device and method with SF6 as a coolant for main transformers. The device comprises an SF6 refrigeration compressor, a cooler, a throttling valve and an SF6 jacket-type evaporator welded to a shell of a main transformer body. The SF6 coolant in the SF6 jacket-type evaporator flows circularly through the SF6 refrigeration compressor and the cooler. Transformer oil in the main transformer body flows to an oil inlet circularly from an oil outlet, and the cold transformer oil takes away heat generated by a main transformer coil and an iron core and is heated to become hot transformer oil. Heat exchange between the hot transformer oil and the low-temperature SF6 coolant in the SF6 jacket-type evaporator is carried out through the side wall of the shell of the main transformer body, and then the hot transformer oil becomes cold transformer oil again. The main transformer coil and the iron core are cooled by the cold transformer oil again. The device has the great advantages of being safe, reliable, high in cooling efficiency, small in size, small in oil consumption, less likely to be maintained and economical in overall operation, and the method is a revolutionary innovation of cooling modes for the main transformers.

Description

technical field [0001] The present invention relates to a kind of SF 6 The utility model relates to a main transformer jacket type cooling device and a method for cooling medium. 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. 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 coil 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 transformer body 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 leak, It...

AI Technical Summary

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 the air, the cooling efficiency of the main transformer is low, the manufacturing volume of the main transformer and radiator equipment is large, the oil consumption is large, the operating cost is high, and the maintenance amount is large, etc.

Images