Digital Transformer Winding Temperature Measuring Device

A transformer winding and temperature measurement technology, which is applied to measuring devices, thermometers, measuring heat, etc., can solve the problems of inconvenient operation, inability to accurately measure winding temperature, and low degree of automation, and achieve convenient use and maintenance, high reliability, and automation high degree of effect

Active Publication Date: 2011-12-21
杭州鸿程科技有限公司
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Problems solved by technology

[0003] The invention mainly solves the technical problems that the existing transformer winding temperature measuring device cannot accurately measure the winding temperature due to structural limitations, the degree of a

Method used

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  • Digital Transformer Winding Temperature Measuring Device
  • Digital Transformer Winding Temperature Measuring Device
  • Digital Transformer Winding Temperature Measuring Device

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Embodiment Construction

[0020] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0021] Such as figure 1 As shown, the digital transformer winding temperature measurement device uses mathematical modeling to achieve thermal simulation effects. The current transformer 1 is connected with the transformer, and is used for indirectly measuring the output current of the transformer. The current output by the converter 1 is measured to obtain an effective current value proportional to the load of the transformer, and provided to the relationship calculation module 2 . The relationship calculation module 2 is implemented by microprocessor software calculation. According to the corresponding relationship between the output current of the converter 1 and the temperature rise, it calculates the average temperature rise of the winding after reaching thermal balance when the transformer outputs a certain current value. The...

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Abstract

The invention discloses a digital transformer winding temperature measuring device, comprising a current converter, a relation computation module, a thermal simulation computation module, a response time setting module and an addition computation module as well as an oil temperature sensor and a temperature display and control module. The current converter is connected with the relation computation module; the relation computation module is connected with a thermal simulation computation module; the thermal simulation computation module, the oil temperature sensor and the temperature display and control module are connected with the addition computation module, respectively; and the response time setting module is connected with the thermal simulation computation module. In the invention, the current converter and a circuit module are added, so that outputting of a current signal is realized, a microprocessor is used for calculating transformer winding temperature by means of mathematic modelling, and the effects of high accuracy, high automation and use convenience are achieved.

Description

technical field [0001] The invention relates to a temperature measuring device, in particular to a digital temperature measuring device suitable for transformer windings. Background technique [0002] The thermal characteristics of the transformer winding determine the load capacity of the power transformer and its insulation service life, which makes the temperature of the transformer winding a decisive factor affecting the normal operation of the power transformer. Therefore, it is of great significance to grasp the winding temperature of the transformer in time to ensure the safe and economical operation of the transformer. At present, the transformer winding temperature is mainly measured by the mechanical transformer winding temperature measuring device, which can approximately measure the transformer winding temperature through the thermal simulation principle. However, due to the structural limitation of the traditional mechanical pointer instrument, the mechanical te...

Claims

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Application Information

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IPC IPC(8): G01K3/02G01K7/22
Inventor 郭明皇
Owner 杭州鸿程科技有限公司
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