Insulating oil heating system and method for transformer fire extinguishing true form test

Abstract

The invention discloses an insulating oil heating system for a transformer fire extinguishing true form test. The insulating oil heating system comprises a uniform heating / constant temperature devicewhich is arranged in an oil tank of a true form test transformer, a preheating device which is used for preheating the cold oil and then injecting the preheated cold oil into the oil tank, an oil supplementing device which is used for supplementing the cold oil, and a heating control module which is used for supplying power to the uniform heating / constant temperature device and the preheating device and controlling the heating power. The uniform heating / constant temperature device and the preheating device are both connected to the heating control module through power lines and control lines,a return pipe and a return oil pump are communicated between the preheating device and the oil tank, the oil supplementing device is communicated with the preheating device through a preheating oil pump, and the oil supplementing device and the preheating device are both communicated with a transformer oil conservator through oil conservator oil pumps. According to the method, the insulating oil can be uniformly heated to the temperature under the actual working condition, so that transformer oil true form fire extinguishing test data is more accurate, and the research level of a transformer fire extinguishing technology is improved; and meanwhile, the insulating oil can be recycled, and the test economy is high.

Description

technical field [0001] The invention relates to the technical field of disaster prevention and reduction in electric power systems, in particular to a system and method for evenly heating insulating oil in transformer fire extinguishing true-type tests. Background technique [0002] The power transformer is the power hub of the electric energy Internet. It contains dozens of tons of hydrocarbon insulating mineral oil. Once a fire occurs, it will cause a large-scale and long-term power outage, causing heavy property losses and even casualties. In order to study the fire extinguishing performance of transformer fire extinguishing means and improve the level of transformer fire prevention and control, it is necessary to carry out a large number of true transformer fire extinguishing tests. The existing test platform injects normal-temperature transformer oil into the transformer to carry out ignition and fire-extinguishing tests. However, due to long-term oil-filled operation o...

AI Technical Summary

Problems solved by technology

The existing test platform injects normal temperature transformer oil into the transformer to carry out ignition and fire extinguishing tests. However, due to the long-term oil-filled operation of the actual transformer, the temperature of the internal insulating oil reaches 90-120°C

The heat release, gas release and fire extinguishing characteristics of insulating oil burning at high temperature and normal temperature are very different. It is difficult to accurately simulate the real working conditions and obtain accurate test data when using normal temperature oil to conduct tests

[0003] Moreover, the irregular distribution of the iron core, windings and other connecting parts inside the transformer hinders the heat conduction of the insulating oil.

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