Transformer temperature control method and transformer

Abstract

The invention discloses a transformer temperature control method. The method comprises the steps of detecting a temperature of top-layer oil in an oil tank through a first temperature sensor in a transformer oil tank; calculating a heat dissipating capacity Q of a contact part of a bottom surface of the transformer and a supporting part in unit time; calculating whether an absolute value of a difference between a ground heat dissipating capacity and an oil surface temperature is greater than a temperature difference threshold; acquiring a three-phase pile head temperature of the transformer for m times; obtaining n times of the oil surface temperature; determining a heating capacity of the transformer; measuring the current equipment temperature of an oil pump of a running transformer cooler group; obtaining a calibration temperature of an oil surface temperature calibration sensor; judging whether the difference between the calibration temperature and the current equipment temperatureof the cooler group oil pump exceeds a standard or not; calculating a transformer winding temperature and a transformer life; sending a predicted life value of the transformer to a cloud server; andusing the cloud server to classify a life cycle of the transformer according to the obtained predicted life value, and recording the latest obtained life cycle classification in a cloud server memory.

Description

technical field [0001] The invention relates to the field of transformers, in particular to a transformer temperature control method and a transformer. Background technique [0002] The power transformer is an important electrical equipment in the power system, and its operation status affects the overall safety and reliability of the power system. Transformer insulation aging due to over-temperature operation of windings accounts for a large proportion of transformer failures in power systems. Therefore, the measurement of transformer oil temperature is extremely important for preventing transformer failures. At present, the measurement of power transformer oil temperature mainly depends on the transformer thermometer and its supporting related devices. In the long-term operation and use process, the accuracy of the thermometer will decrease with the use time, resulting in errors or even errors in the detection results, thus losing effective monitoring of the transformer t...

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Problems solved by technology

The controller is generally composed of a controller, a matching device, and a secondary instrument. The cost is relatively high, but the actual application is less, and it is generally not connected to the non-electric control circuit, and because the mechanical part is easy to rust, the potentiometer in the controller is easily damaged. , the meter structure is complex, expensive, and difficult to repair, which seriously affects the local meter indication and the temperature display of the monitoring system

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