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Distribution transformer winding temperature rise online monitoring system and online monitoring method

A technology for temperature rise of distribution transformers and windings, which is applied in the direction of measuring electrical variables, instruments, thermometers, etc., can solve problems such as heating of windings or switch contacts, aging of insulating materials, and reduction of economic benefits, so as to ensure safe and reliable power supply and prevent Destroyed, reliability-enhancing effects

Active Publication Date: 2019-05-31
SHANDONG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the winding temperature of the transformer is too low during operation, the capacity of the transformer will not be fully utilized and the economic benefit will be reduced; if the temperature is too high, it will not only cause the winding or switch contacts to heat up, the insulation material will age, and in severe cases, the connection will be burned. Conductors and related equipment, fire accidents, causing power interruption

Method used

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  • Distribution transformer winding temperature rise online monitoring system and online monitoring method
  • Distribution transformer winding temperature rise online monitoring system and online monitoring method
  • Distribution transformer winding temperature rise online monitoring system and online monitoring method

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Embodiment 1

[0047] Such as Figure 1-3As shown, the distribution transformer winding temperature rise online monitoring system adopted in the present invention includes: a signal acquisition unit, a logic processing unit and a communication unit, and the output terminals of the current transformer, voltage transformer and room temperature meter are connected to the signal acquisition unit at the same time The input end, the output end of the signal acquisition unit is connected to the input end of the logic processing unit, the output end of the logic processing unit is connected to the input end of the communication unit, and the output end of the communication unit is connected to the client. Specifically, the electrical principle structure includes distribution transformer T, incoming line L 1 Connect the primary side (high voltage side) of the distribution transformer T, and connect the secondary side (low voltage side) of the distribution transformer T to the low voltage bus L 2 , a...

Embodiment 2

[0087] The difference between this embodiment and Embodiment 1 is that in this embodiment, in step 1002 of the online monitoring method for the temperature rise of the distribution transformer T winding, the current transformer TA installed on the primary side of the distribution transformer T 1 , Secondary side current transformer TA 2 , the primary side voltage transformer and the secondary side voltage transformer to obtain the corresponding current value and voltage value, and then by changing the load, the current value and voltage value are obtained, and the equivalent resistance of the distribution transformer T is calculated, and finally the three-phase temperature rise of the winding.

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Abstract

The invention belongs to the technical field of power distribution equipment operating state detection and relates to a distribution transformer winding temperature rise online monitoring system and online monitoring method. The system comprises a signal acquisition unit, a logic processing unit, a communication unit, a current transformer, a voltage transformer, a room temperature meter and a client; the output ends of the current transformer, the voltage transformer and the room temperature meter are simultaneously connected with the input end of the signal acquisition unit; the output end of the signal acquisition unit is connected with the input end of the logic processing unit; the output end of the logic processing unit is connected with the input end of the communication unit; and the output end of the communication unit is connected with the client. The distribution transformer winding temperature rise online monitoring system and online monitoring method of the invention can monitor the temperature rise change of the three-phase winding of a distribution transformer during the operation of the distribution transformer, thereby greatly improving the reliability of detection.

Description

technical field [0001] The invention belongs to the technical field of detecting the operating state of power distribution equipment, and in particular relates to an on-line monitoring system and an on-line monitoring method for the temperature rise of a distribution transformer winding. Background technique [0002] In recent years, my country's electric power industry has developed rapidly. As one of the important equipment for electric energy transmission, the safety of transformers has become an important issue. Due to the wide distribution, large number and large proportion of energy consumption of distribution transformers, their operation status is very important to the stability of power grid power supply. Among them, distribution transformer faults caused by abnormal winding temperature are very common, directly affecting the normal supply of industrial production and users' daily life, and restricting the development of the national economy to a large extent. [0...

Claims

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Application Information

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IPC IPC(8): G01K13/00G01R31/00
Inventor 咸日常崔聪咸日明荣庆玉
Owner SHANDONG UNIV OF TECH