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Intelligent air-cooling frequency-changing energy-saving system and method of transformer

A transformer, intelligent technology, applied in the direction of transformer/inductor cooling, program control in sequence/logic controller, electrical program control, etc., can solve the problems of poor cooling effect, poor flexibility, and uneconomical application.

Active Publication Date: 2013-09-25
STATE GRID SHANDONG ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the air-cooled frequency conversion energy-saving method for transformers in the prior art has poor flexibility, single operation mode, and low control precision. It is economical and suitable for various complex occasions and environments, and the economical operation of the cooler cannot be realized, resulting in waste of resources, so as to provide an energy-saving method and system for transformer intelligent frequency conversion air cooling with high control precision

Method used

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  • Intelligent air-cooling frequency-changing energy-saving system and method of transformer
  • Intelligent air-cooling frequency-changing energy-saving system and method of transformer

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Embodiment 1

[0052] Flow chart of an energy-saving method for intelligent variable-frequency air-cooling of compressors provided in this embodiment figure 1 As shown, the transformer intelligent frequency conversion air-cooled energy-saving method is to jointly control the number of coolers and the fan speed according to the top oil temperature of the transformer, the winding temperature and the load current. The method is as follows:

[0053] (1) When the oil temperature on the top layer of the transformer or the winding temperature T≤30°C and the load current is less than 70% of the rated current, start the working cooler group, and the maximum frequency of the frequency converter of the working cooler group is limited to f 1max , the initial frequency of the frequency converter of the working cooler group is f 1 , at this time the frequency converter of the working cooler group runs at the initial frequency f 1 , constant frequency and constant speed operation.

[0054] The initial fr...

Embodiment 2

[0094] Flow chart of an energy-saving method for intelligent variable-frequency air-cooling of compressors provided in this embodiment figure 1 As shown, the transformer intelligent frequency conversion air-cooled energy-saving method is to jointly control the number of coolers and the fan speed according to the top oil temperature of the transformer, the winding temperature and the load current. The method is as follows:

[0095] (1) When the oil temperature on the top layer of the transformer or the winding temperature T≤30°C and the load current is less than 70% of the rated current, start the working cooler group, the maximum frequency of the frequency converter of the working cooler group is limited to 48Hz, and the working The inverter frequency of the cooler group is 5Hz, running at constant frequency and constant speed.

[0096] (2) When the oil temperature on the top layer of the transformer or the winding temperature is 30℃

[0097] At this time, when the oil...

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Abstract

The invention relates to an intelligent air-cooling frequency-changing energy-saving system and method of a transformer. The intelligent air-cooling frequency-changing energy-saving system and method of the transformer can commonly control the number of operating cooling device sets and a rotation speed of a fan according to top-layer temperature, winding temperature and loaded currents of the transformer. The top-layer temperature and the winding temperature of the transformer serve as frequency modulating and controlling parameters of a frequency converter, the rotation speed of cooling devices and projecting and removing of the cooling device sets are controlled by taking variation of the load currents into consideration. The intelligent air-cooling frequency-changing energy-saving method of the transformer can effectively avoid the fact that an air-cooling frequency-changing energy-saving method of a transformer in the prior art is poor in flexibility, single in operation manner, low in control precision, large in noise and poor in cooling effect as accurate tracking control is not performed according to variation of the oil temperature and the winding temperature of the transformer and can not be economically suitable for all sorts of complicated occasions and circumstances or achieve economical operation of the cooling devices. The problem of wasting resources can be avoided by the intelligent air-cooling frequency-changing energy-saving method of the transformer.

Description

technical field [0001] The invention relates to a transformer air cooling system, which belongs to the technical field of power equipment. Background technique [0002] The power transformer is one of the main equipment in the power system. Its main functions are voltage conversion and current transmission. The no-load loss, load loss and ambient temperature will all affect the temperature of the transformer cooling oil. The greater the change in the transformer load, the greater the loss. The greater the temperature change, the greater the temperature of the transformer is also affected by the external environment. Even on the same day, due to the superposition of day and night temperature changes and load peak-to-valley differences, it is one of the main reasons for the large temperature changes of the transformer, which in turn affects The long-term stable operation and service life of the transformer are ensured. [0003] The traditional transformer cooling system adopt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/05H01F27/08
Inventor 刘远龙陈志勇崔潇于立涛于强王林峰胡东
Owner STATE GRID SHANDONG ELECTRIC POWER
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