An ultrasonic intelligent cooling method for substation main transformer

Abstract

The invention relates to an ultrasonic intelligent cooling method for a substation main transformer. Including: the control module performs program programming; after the main transformer is running, turn on the ultrasonic intelligent cooling device of the main transformer in the substation; when the temperature detector detects that the oil temperature of the transformer oil rises to the high temperature threshold, the control module controls to automatically turn on the ultrasonic generator. Surround the ultrasonic transmitting probe to emit ultrasonic waves to ultrasonically oscillate the transformer oil in the main transformer; when the oil temperature of the transformer oil continues to rise, increase the power of the ultrasonic generator to generate ultrasonic waves, and vice versa; when the oil temperature of the transformer oil drops to the set value The ultrasonic generator is automatically turned off; the surrounding electric field monitoring probe of the electric field monitor monitors the electric field disturbance caused by the transformer oil oscillation in the main transformer. When the electric field disturbance reaches the set value, the control module automatically controls to reduce the ultrasonic generator. Ultrasonic power. The invention can effectively enhance the heat exchange and cooling capacity.

Description

technical field [0001] The invention relates to an ultrasonic intelligent cooling method for a substation main transformer. Background technique [0002] During the operation of the main transformer in the substation, the winding and iron core will generate a lot of heat due to the electromagnetic effect, which needs to be dissipated and cooled by the transformer oil. There are two main ways for the main transformer to circulate and cool the oil flow. One is to install a circulating submersible pump for intensive Oil circulation cooling, the second is cooling by natural temperature difference. The first method requires an external high-speed mechanically rotating power oil pump, and if there is a tiny crack leaking in the negative pressure area of ​​the oil pump, cavitation will occur, and the humid air from the outside will be sucked into the main transformer, endangering the safe operation of the main transformer. Secondly, the oil pump will run at high speed for a long ti...

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Problems solved by technology

The first method requires an external high-speed mechanically rotating power oil pump, and if there is a tiny crack leaking in the negative pressure area of ​​the oil pump, cavitation will occur, and the humid air from the outside will be sucked into the main transformer, endangering the safe operation of the main transformer. Secondly, the oil pump will run at high speed for a long time Heat is generated, especially when the oil pump has a heating fault, it will cause the transformer oil flowing through the oil pump to be heated and cracked, which also endangers the safe operation of the main transformer, and at the same time causes misjudgment of the transformer oil chromatography monitoring test, and the oil pump is easily damaged due to long-term mechanical wear, etc.

The second way is the natural cooling of heat exchange by continuously reducing the temperature difference gradient, which requires a large increase in the amount of oil used and the heat dissipation area of ​​the main transformer to meet the satisfaction. Equipment investment cost and floor area

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