Power transformer oil heat dissipation system with three-dimensional discrete expansion surface

Abstract

The invention discloses a power transformer oil heat dissipation system with a three-dimensional discrete expansion surface. The system comprises a heat dissipation vertical pipe array, the heat dissipation vertical pipe array is composed of a plurality of heat dissipation pipes which are vertically arranged in an array, discrete raised strengthening units are carved on the pipe wall of the upper part of each heat dissipation pipe, and the lower part of each heat dissipation pipe is a light pipe; the lower portion of the heat dissipation vertical pipe array is sleeved with a sleeve through which infrared radiation can penetrate, so that the chimney effect formed by the sleeve can suck more air to cool the wall face of the heat dissipation pipe; the top and the bottom of the heat dissipation vertical pipe array are respectively connected with an upper distribution header and a lower distribution header, the top of the upper distribution header is connected with an upper oil collecting pipe, and the bottom of the lower distribution header is communicated with a lower oil collecting pipe; the upper distribution header is composed of a plurality of upper distribution pipes which are arranged in parallel, the lower distribution header is composed of a plurality of lower distribution pipes which are arranged in parallel, and the upper distribution pipes and the lower distribution pipes are hollow pipes with two sealed ends; and the system can be widely applied to the fields of electric power and the like.

Description

technical field [0001] The invention relates to a power transformer oil heat dissipation system, in particular to a power transformer oil heat dissipation system with a three-dimensional discrete extended surface. Background technique [0002] Due to the rapid development of the city, the load of the power grid continues to increase, and it is difficult to select a new substation site in the urban area, resulting in more transformers operating at full load or overload, coupled with strong solar radiation in summer, high ambient temperature and much dust in the air, etc. The top layer oil temperature of some transformers exceeds 95°C (self-cooling and air-cooling) stipulated in DL / T572-6 "Power Transformer Operation Regulations" during peak summer. Power transformers generally use Class A insulating materials, and the allowable temperature is 15°C. GB / T 194.7-208 "Oil-immersed Power Transformer Load Guidelines" stipulates the relative aging rate of transformer insulation mat...

AI Technical Summary

Problems solved by technology

Although it has a certain cooling effect, it will waste a lot of manpower and material resources. At the same time, water spraying at high temperature will easily cause corrosion of the fin radiator, which will affect the long-term stable operation of the transformer.

[0003] At present, most of the radiators used in oil-immersed transformers are fin radiators, which have problems such as small oil heat transfer coefficient, unreasonable oil flow distribution and poor pressure bearing capacity.

Images