A transformer temperature control method and transformer
A temperature control method and technology for transformers, applied in the field of transformers, can solve the problems of difficult maintenance, few practical applications, affecting the temperature display indicated by a meter, etc.
Active Publication Date: 2022-04-26
NINGBO AUX HIGH TECH
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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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[0044] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with some aspects of the invention as recited in the appended claims.
[0045] The terminology used in the present invention is for the purpose of describing particular embodiments only and is not intended to limit the present invention. As used in this specification and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It will also be understood that the term "an...
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The invention discloses a temperature control method for a transformer, which includes: turning on the fan unit according to the oil temperature on the top layer of the transformer to cool down; determining whether to start the oil pump of the cooler group according to the oil temperature on the top layer and the current load of the transformer; The current equipment temperature of the oil pump in the transformer cooler group; determine the frequency change command of the oil pump motor according to the current equipment temperature of the oil pump in the cooler group; judge whether the oil pump frequency at this time reaches the frequency threshold; judge whether the top oil temperature is greater than the upper limit temperature at this time; Determine the cooling power of the cooler group oil pump according to the current equipment temperature of the cooler group oil pump and the number of currently activated fans, and perform a rated correction on the cooling power, and determine the cooling power according to the rated corrected cooling power According to the heat dissipation efficiency of the cooler, an alarm signal is output according to the corrected heat dissipation efficiency of the cooler and the preset lower limit value of heat dissipation efficiency; the number of starting oil pumps is determined according to the top oil temperature.
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, and the resulting transformer faults account for a large proportion of the faults in the power system. Therefore, the measurement of transformer oil temperature is of great significance for preventing transformer faults. At present, the measurement of the oil temperature of the power transformer mainly relies on the transformer thermometer and its supporting related devices. During long-term operation and use, the accuracy of the thermometer will decrease with the use of time, resulting in errors or even errors in the detection results, thus losing effect...
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IPC IPC(8): G05D23/20H01F27/08H01F27/12H01F27/40
CPCG05D23/20H01F27/085H01F27/12H01F27/402H01F2027/406
Inventor 陈欢林先明刘利权
Owner NINGBO AUX HIGH TECH