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Transformer oil temperature monitoring system with temperature prediction function

A technology of transformer oil and monitoring system, applied in the direction of temperature control, control/regulation system, non-electric variable control, etc., can solve the problems of frequent startup of cooling fans, affecting the stability of the fan life system, etc., to solve the problem of oil temperature runaway and reliable Good performance and high precision

Inactive Publication Date: 2015-11-11
STATE GRID CORP OF CHINA +1
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AI Technical Summary

Problems solved by technology

Most of the existing methods are to measure the oil temperature on the top layer of the transformer. If the measured temperature reaches the start-stop value of the cooling fan set by the system, the fan will start and stop. This method uses a single system temperature setting value as the criterion for starting and stopping the cooling fan. method, when the oil temperature changes near the system setting value, the problem of frequent start-up of the cooling fan may occur, which seriously affects the life of the fan and the stability of the system

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  • Transformer oil temperature monitoring system with temperature prediction function
  • Transformer oil temperature monitoring system with temperature prediction function
  • Transformer oil temperature monitoring system with temperature prediction function

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Embodiment Construction

[0039] The technical solutions of the present invention will be described in further detail below through specific implementation methods.

[0040] like figure 1 As shown, a transformer oil temperature monitoring system with temperature prediction function, which includes:

[0041] The digital temperature sensor collects the top layer oil temperature value of the transformer oil tank; the digital temperature sensor can adopt the DS18B20 single-line digital temperature sensor of the U.S. DALLAS company to realize the signal acquisition function of the transformer top layer oil temperature;

[0042] The microprocessor module is connected with a digital temperature sensor, receives the transformer top layer oil temperature value collected by the processing digital temperature sensor, and outputs a cooling control signal or a cooling control signal; when specifically designed, the microprocessor module adopts ATMEL The AT89S52 single-chip microcomputer designed by the company, DS...

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Abstract

The invention provides a transformer oil temperature monitoring system with a temperature prediction function. The system comprises a digital temperature sensor which acquires the top oil temperature value of a transformer oil tank, a microprocessor module which is connected with the digital temperature sensor and receives the transformer top oil temperature value acquired by the digital temperature sensor, a keyboard input module which is connected with the microprocessor module and is used for setting or changing the upper limit temperature value and the lower limit temperature value of start and stop of a cooling fan, a cooling system control module which is connected with the microprocessor and the cooling fan and starts and stops the cooling fan according to a control signal of the microprocessor, and a control power supply module which is used for providing system operating voltage. A gray prediction model GM (1,1) algorithm is used to predict the transformer top oil temperature value. If the predicted oil temperature value is higher than a set upper limit temperature value, a cooling start control signal is output. If the predicted oil temperature value is lower than a set lower limit temperature value, a cooling stop control signal is output.

Description

technical field [0001] The invention belongs to the field of temperature monitoring, and in particular relates to a transformer oil temperature monitoring system with a temperature prediction function. Background technique [0002] As one of the most important electrical equipment in the power system, the power transformer's operation reliability will directly affect the safe and stable operation of the power grid, so it is of great significance to ensure the operation reliability of the transformer. Transformer oil temperature is one of the important factors that determine the long-term load capacity of the transformer. If the oil temperature exceeds the limit, the transformer will not operate normally, and the thermal aging of the transformer will be accelerated, which will affect the service life. Therefore, it is particularly important to monitor the transformer oil temperature. [0003] At present, there are three main cooling methods for transformers: oil-immersed sel...

Claims

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Application Information

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IPC IPC(8): G05D23/20
Inventor 马勇陶玉麒蔡桂民张海涛
Owner STATE GRID CORP OF CHINA
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