Cooling fan control method and system

Abstract

The invention discloses a cooling fan control method and system. The system part comprises a temperature sensing and transmitting device and a cooling fan energy-saving system; the temperature sensing and transmitting device comprises a temperature sensor and a temperature transmitter; the cooling fan energy-saving system comprises a main controller unit, an A / D (Analog to Digital) conversion unit, a power supply unit, a fan control output interface unit; the temperature sensor is immersed in an oil tank of transformer insulating oil, acquires real-time temperature data and sends the real-time temperature data to the A / D conversion unit by the temperature transmitter, and an output signal of fan control is obtained by operation of the main controller unit and is sent to a cooling fan. The method comprises: firstly, acquiring a temperature in the transformer insulating oil; converting an insulating oil temperature signal into an electric signal; when the electric signal is higher than a set value, controlling a cooling fan to be started; or shutting down the cooling fan. Energy efficiency of the cooling fan is improved, and cost is reduced.

Description

technical field [0001] The invention relates to a cooling fan control method and system, belonging to the field of electrical equipment control. Background technique [0002] The transformer is the main component of the main circuit of the electric locomotive to realize the conversion of electric energy, and its operating status plays a vital role in the power consumption of the electric locomotive. In order to ensure the safe operation of the main transformer, a cooling method combining forced oil circulation and air cooling is generally adopted, so that the main transformer will not be burned due to excessive working temperature. The fan of the main transformer is driven by the three-phase auxiliary motor in the auxiliary circuit of the electric locomotive. The fan also consumes a large amount of electric energy while dissipating heat. [0003] The current technology generally puts the fan of the transformer into operation directly, and the operation time of the transform...

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Problems solved by technology

The fan of the main transformer is driven by the three-phase auxiliary motor in the auxiliary circuit of the electric locomotive. The fan also consumes a lot of power while dissipating heat.

[0003] The current technology generally puts the fan of the transformer into operation directly, and the operation time of the transformer is relatively long. When the oil temperature of the transformer is high, it is necessary to put the fan into operation along with the operation of the transformer, but when the oil temperature is not high, The operation of the transformer oil pump is enough to meet the requirements of cooling the transformer. At this time, it is redundant to put the transformer fan into operation. This not only wastes electric energy, but also deteriorates the working environment due to the high noise of the transformer fan when it is running.

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