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Intelligent on-line checking method for transformer oil surface thermometer

A calibration method and technology for thermometers, applied in thermometer testing/calibration, thermometers, instruments, etc., can solve problems such as increased operation and maintenance workload, power outage of power transformers, and labor consumption, so as to improve maintenance coordination efficiency and ensure safety and stability. running effect

Inactive Publication Date: 2017-09-19
STATE GRID FUJIAN ELECTRIC POWER CO LTD +2
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

On the one hand, it requires a lot of manpower, which increases the workload of operation and maintenance; on the other hand, the corresponding power transformer needs to be cut off during the calibration process, which causes economic losses

Method used

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  • Intelligent on-line checking method for transformer oil surface thermometer
  • Intelligent on-line checking method for transformer oil surface thermometer
  • Intelligent on-line checking method for transformer oil surface thermometer

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Embodiment

[0027] see Figure 1 to Figure 3 As shown in the figure, an intelligent online calibration method for a transformer oil surface thermometer of the present invention, the transformer is provided with an oil surface thermometer, the oil surface thermometer includes a dial 111 and a temperature sensor 11, and the temperature sensor 11 of the oil surface thermometer is immersed in the In the oil storage tank 5 of the transformer; an intelligent calibration terminal 1 is set on the transformer, and the intelligent calibration terminal 1 includes a calibration sensor 12, a control module 13 and a communication module 14, and the control module 13 is respectively connected with the oil surface thermometer. The temperature sensor 11 and the calibration sensor 12 are signally connected, and the control module 13 is signally connected to the communication module 14; the detection accuracy of the calibration sensor 12 is higher than that of the temperature sensor 11 of the oil surface the...

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Abstract

The invention discloses an intelligent on-line checking method for a transformer oil surface thermometer. The method comprises the steps that: (1) a control module generates a control signal such that the oil surface thermometer and a calibration sensor start to collect oil temperature data in an oil storage tank, and a temperature sensor of the oil surface thermometer and the calibration sensor have a same data collection interval, (2) the oil surface thermometer obtains a group of actual measurement data, a calibration oil surface thermometer obtains a group of calibration measurement data and transmits the measurement data to the control module, (3) the control module uploads the actual measurement data and the calibration measurement data to a data cloud platform through a communication module, and (4) the data cloud platform calculates and obtains an oil surface thermometer measurement error. The invention provides an online detection method for transformer oil temperature detection, the accuracy calibration of the transformer oil surface thermometer can be realized under the condition of no power cut, and the method has an important meaning for the safe and stable operation of a power grid.

Description

technical field [0001] The invention relates to an online detection method, in particular to an online detection method suitable for transformer oil temperature detection. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K15/00
CPCG01K15/005
Inventor 程祝媛黄良平钱志立陈延斌欧永连刘逸峰孙莹许碰梅邹丽彬张哲峰王永健
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD
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