Intelligent cooling control method for transformer

Abstract

The invention provides an intelligent cooling control method for a transformer. The method comprises the steps of setting an operation temperature range for achieving the maximum utilization value of the transformer, taking the temperature range as a control target of a cooling system, enhancing the cooling intensity when the load of the transformer is increased and the temperature is increased, and weakening the cooling intensity when the load of the transformer is reduced and the temperature is reduced. Dynamic control over the cooling system is achieved, what is guaranteed is that the transformer is within the operating temperature range, meanwhile, resource waste is reduced, the service life of each cooling device is balanced, and the utilization value of the cooling system is maximized. Meanwhile, before the load of the transformer is increased, the cooling intensity of the cooling system is increased in advance, for example, the flow speed of fluid is increased, the situation that when the load is suddenly increased, the hot-spot temperature of the winding exceeds the highest temperature borne by the normal operation service life, and consequently the service life of the winding is lost is prevented, and the maximum utilization value of the transformer is achieved on the premise that the normal service life is guaranteed.

Description

technical field [0001] The invention relates to the field of transformer cooling system control, in particular to an intelligent cooling control method for transformers. Background technique [0002] Judging from the actual situation of the national power load market throughout the year, the colder or hotter the weather, the faster the increase in power load and the higher the temperature rise of the transformer; even on the same day, due to day and night temperature changes and load peaks The superimposition of valley difference changes is a major factor that causes large fluctuations in transformer temperature. Due to the influence of the above factors, the temperature of the transformer fluctuates greatly, which affects the long-term safe operation and service life of the transformer. [0003] The cooling methods of oil-immersed transformers mainly include: oil-immersed self-cooling, oil-immersed air cooling, forced oil air cooling, guided forced oil cooling, etc. At pr...

AI Technical Summary

Problems solved by technology

[0005] When the cooling module is switched to the "manual" position, the cooling system will be fully engaged, which will increase the probability of failure of the cooling device and affect its life

[0006] The cooling device is controlled according to the load and the temperature of the top layer. When the overload starts and the temperature is not high (in winter), the cooling system is fully put into use, which will also affect its service life.

[0007] To sum up, at present, the intelligence level of the evaluation technology of transformer hot spot temperature and the control strategy of cooling system is not high at home and abroad.

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