The Application Of Heat Pipe Technology In Oil-Immersed Transformer

Transformer is an important equipment of power system, it is very significant to the power economical transmission, flexible distribution and safely use. Oil immersed transformer is widely used in power transmission made in our country and natural oil circulation is used at about 80% in oil-immersed transformers. At present, according to the conception of ecological design for the city, it has proposed that the transformer can be buried underground like the underground cables in city and putting the electric ark which is less heat, more operation and smaller upon the ground in overseas. So that it can solve the noise-disturbing question and don't occupy too much space in the city. And it also can achieve the aim of convenient operation and beautifying environment. But when we put the traditional oil-immersed transformer into the underground room, it is difficult to solve the question that the transformer can't transfer heat by natural convection itself. So the oil in transformer will rise temperature too high and the transformer should stop running, sometimes the transformer even may cause fire and exploding because of the high temperature.This paper puts forward a scheme applying gravitational heat pipe in the transformer to transfer heat. It can improve the cooling efficiency and optimize the heat transfer of transformer. The scheme can better solve the question that the traditional transformer is difficult to transfer heat from underground room. It is the innovation of this paper.This paper dissertates by the numbers the feasibility that the heat pipe technology applies in oil-immersed transformer, sums up the latest national inside and outside research fruits, puts forward an new scheme applying heat pipe in the transformer, sets up the way and the model of calculation according to the 10-kVA electrical transformer and designs a program written in VC++ language to calculate the temperature rise of the heat pipe transformer. The calculating results are quite identical to the results of the experimental temperature. This method can meet the demands of the project. The result of experiment proves that the gravitational heat pipe can fulfill the demands of the transformer from both the technology and the thermodynamic performance. It also proves that the heat pipe can flexibly control the oil temperature rise and is better in the effect of transferring heat than the panel-type radiator considered from the economical performance and the applicable performance.