Oil cooling system of large transformer for nuclear power station

Abstract

The invention is suitable for the field of electromechanical technologies and provides an oil cooling system of a large transformer for a nuclear power station. In an embodiment of the invention, an oil inlet of an oil cooler at a high-voltage side of the transformer is connected with an oil conduit extending to a region of a bus copper bar at a low-voltage side of the transformer, a plurality of shunting holes are formed in the extending end part of the oil conduit, working oil introduced from the oil inlet flows through the surface of the bus copper bar through the oil conduit and the shunting holes so as to circularly cool the bus copper bar, therefore, local hot spots existing inside the transformer are eliminated and the quality of insulating oil is increased; in addition, the surface of the bus copper bar is prevented from the accumulation of a large amount of black oil sludge and the phenomenon of oxide layer shedding, so that the service life of the transformer is ensured and even can be prolonged, and giant economic benefits are brought.

Description

technical field [0001] The invention belongs to the field of electromechanical technology, and in particular relates to an oil cooling system for a large transformer used in a nuclear power plant. Background technique [0002] Nuclear power plant transformers have long had the problem of excessive hydrocarbons in insulating oil and dielectric loss. The traditional solution usually adopts the method of absorbing and filtering the insulating oil after vacuum filtering the oil for regular treatment. However, the vacuum oil filtering can only dehydrate and degas the insulating oil, but cannot improve other indicators of the insulating oil, such as dielectric loss. , acid value, etc., and the cost is high; although the adsorption oil filter can absorb harmful colloids in the oil and improve a number of performance indicators of the insulating oil, it will also reduce the anti-aging characteristics of the oil and the ability to dissolve sludge. There is also the possibility that ...

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Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide an oil cooling system for large transformers used in nuclear power plants, which aims to solve the problems in the structural design of the existing transformers, which cause local hot spots inside the transformers, resulting in the deterioration of the insulating oil quality, and the existence of low voltage transformers. The surface area of ​​the exposed busbar copper bar on the side is covered with a large amount of black sludge and the oxide layer is peeling off

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