Efficient online oil filtering method for transformer insulating oil

Abstract

The invention discloses an efficient online oil filtering method for transformer insulating oil. The method comprises the following steps: filtering a transformer in a loaded and/or unloaded environment. The method adopts an external circulation system and an internal treatment and purification system, wherein the external circulating system comprises a pipeline, a valve, a heater and a heat exchanger; the internal treatment purification system comprises an oil discharge pump, a primary filter, an adsorption column, a fine filter, a vacuum pump, a vacuum cylinder, a vacuum meter, a water pump,a water storage device and an exhaust nozzle; the internal treatment purification system further comprises an automatic control system which is composed of a control unit, an inlet temperature sensor, an outlet temperature sensor and a flow sensor, wherein the control unit receives signals of the inlet temperature sensor, the outlet temperature sensor and the flow sensor and controls the valve, the heater and the radiator according to the signals hereinbefore. By means of the online oil filtering method, the oil filtering efficiency can be fully improved, and the oil filtering effect is guaranteed.

Description

technical field [0001] The invention relates to the field of transformer filtering and impurity removal, in particular to a high-efficiency online oil filtering method for transformer insulating oil. Background technique [0002] During the operation of the power system, due to the fluctuation of load and the change of reactive power, the voltage deviation (the difference between the actual voltage and the rated voltage) on the user side is inevitable, and effective measures must be taken to stabilize the voltage of the power grid. At present, the use of transformer on-load tap changer to adjust voltage is a way widely used in the power system at present. The transformer is one of the key equipment in the process of power transmission in the power system, and its performance and operation status will directly affect whether the entire power grid It can operate safely. For large transformers, transformer oil is one of the materials that constitute the main insulation of the...

AI Technical Summary

Problems solved by technology

At present, the use of transformer on-load tap changer to adjust voltage is a way widely used in the power system at present. The transformer is one of the key equipment in the process of power transmission in the power system, and its performance and operation status will directly affect whether the entire power grid It can operate safely. For large transformers, transformer oil is one of the materials that constitute the main insulation of the transformer. It plays the role of insulation, cooling, arc extinguishing and information transmission in the transformer. It can be called the "blood" of the transformer. The transformer has The frequent switching action of the on-load tap-changer reduces the oil quality of the insulating oil, which in turn leads to a decrease in the insulation performance of the switch insulation. The accumulation of free carbon and heavy metal particles in the oil chamber of the on-load tap-changer will seriously affect the distribution. The overall insulation level of the switch, with the increase of carbon particles and micro-water content suspended in the oil, the insulation strength of the oil will be greatly reduced, and in the long-term operation of the transformer, due to moisture pollution, gas pollution, particle pollution, microbial Pollution and other reasons will lead to deterioration, and the deteriorated insulating oil will directly affect the operation safety and service life of the equipment, so it is necessary to purify the polluted transformer oil

[0003] For existing transformers, due to the large amount of oil used in transformers, the amount of conventional oil filtering is large, and the efficiency is low, and the effect is not obvious. min, and the trace moisture, breakdown voltage, solvent dissolved gas content, dielectric loss factor, etc. are close to the new oil index, and at the same time, there is no need to power off to filter oil, which will not affect the stability of the system operation

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