Oil-immersed transformer cooling system control method based on actual load

Abstract

The invention relates to an oil-immersed transformer cooling system control method based on actual load. The method includes finding the position of a hottest area of a transformer in the operation process through an optical fiber temperature measurement system, and adjusting an on-off state of a cooling system around to control the internal temperature of the transformer in real time. According to method, load occasions in the transformer can be monitored in real time, the internal temperature of the transformer is smoothly adjusted based on distribution positions of hot points, and failures in the transformer due to high temperature or acceleration of insulation ageing are avoided.

Description

technical field [0001] The invention belongs to the field of intelligent control of transformer coolers in power transmission and transformation equipment, and in particular relates to a method for controlling the cooling system of the transformer based on the actual load of the transformer. Background technique [0002] During the actual operation of the transformer, a large amount of heat will be generated, which will cause the internal temperature of the transformer to rise rapidly, resulting in accelerated aging of the transformer insulation system, equipment damage due to high temperature, and even explosions. For large oil-immersed transformers, the cooling system generally uses forced oil circulation air-cooled coolers or forced oil circulation water-cooled coolers. Nowadays, the control method is mainly based on the temperature of the oil top layer of the transformer, so as to control the temperature of the transformer. The cooler is adjusted. The main drawbacks of ...

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Problems solved by technology

[0003] 1. Only monitoring the temperature of the top layer of the transformer cannot fully explain the actual situation inside the transformer;

[0004] 2. The current main control method is to adjust the internal temperature of the transformer cooler by adjusting the number of operations of the transformer cooler when the temperature of the oil top layer reaches a certain temperature. This method cannot adjust the internal temperature of the transformer relatively smoothly;

[0005] 3. The transformer cooler starts and stops frequently with the change of internal temperature, and its switch failure is easy to occur; several groups of coolers are turned on or off at the same time, sometimes it is impossible to effectively control the cooling system in real time for the hot spot of the transformer, which may be due to Local high temperature causes accelerated aging of insulation in some areas inside the transformer, and even damage

This invention is only a control device for setting strategy rotation switching, which cannot effectively monitor the internal temperature of the transformer in real time and adjust the cooling system in real time

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