KR-20260065123-A - Abnormality determination method for power equipment using temperature detection

Abstract

The present invention relates to a method for determining an abnormality in power equipment using temperature detection, and may include a) a step of calculating an average load rate of power equipment; b) a step of calculating an allowable temperature rise for each load rate based on the average load rate; c) a step of calculating a temperature rise measurement using a thermal image; and d) a step of determining an abnormality in power equipment when the temperature rise measurement exceeds the allowable temperature rise for each load rate.

Inventors

• 조익춘

Assignees

• 엘에스일렉트릭(주)

Dates

Publication Date

20260508

Application Date

20241101

Claims (8)

1. As a method for determining abnormalities in power equipment performed on a computing device, a) A step of calculating the average load factor of the power facilities; b) A step of calculating the allowable temperature rise for each load rate based on the above average load rate; c) a step of calculating a temperature rise measurement using a thermal image; and d) A method for determining an abnormality in power equipment, comprising the step of determining an abnormality in power equipment when the above temperature rise measurement exceeds the allowable temperature rise limit for each load rate.
2. In paragraph 1, The average load rate of the above power facility is calculated within the range of time differences according to the time constant, and A method for determining abnormalities in power equipment, characterized in that the above thermal image is a thermal image having a time difference according to a time constant.
3. In paragraph 1, The above average load rate is, A method for determining abnormalities in power equipment, characterized by being obtained as the ratio of the average load rate within a time constant range to a 100% load rate.
4. In paragraph 1, The above allowable temperature rise for each load rate is, A method for determining abnormalities in power equipment, characterized by adding an allowable margin to the value obtained by multiplying the rated temperature rise allowable value by the square of the average load rate.
5. In paragraph 4, The allowable margin is, A method for determining abnormalities in power equipment, characterized by a value set considering the error of a thermal image.
6. In paragraph 1, The above temperature rise measurement is, A method for determining abnormalities in power equipment, characterized by being a value obtained by subtracting the ambient temperature from the temperature of the power equipment.
7. In paragraph 1, Prior to step a) above, A method for determining an abnormality in power equipment, further comprising a step of determining an abnormality in power equipment if the measured temperature of the power equipment and the power equipment exceed the rated allowable temperature.
8. In paragraph 1, Prior to step a) above, A method for determining abnormalities in power equipment, further comprising a step of determining that the power equipment is abnormal if the measured temperature rise exceeds the rated temperature rise allowable limit.

Description

Abnormality determination method for power equipment using temperature detection The present invention relates to a method for determining abnormalities in power equipment using temperature detection, and more specifically, to a method for determining abnormalities in power equipment considering the load rate. Generally, as a method to determine whether there is an abnormality in power equipment in operation, a method is used to detect the temperature of the power equipment and determine that a component that has overheated above the allowable temperature of the components of the power equipment is an abnormality of the equipment. For example, Korean registered patent No. 10-1791305 (registered on October 23, 2017, device and method for diagnosing power equipment using a thermal imaging camera) describes a technology that uses a thermal imaging camera to photograph an area including power equipment and compares it with a judgment criterion to determine if the equipment temperature is higher than the criterion. However, conventional temperature-based fault detection technology for power equipment has limitations in that temperature standards, such as rated allowable temperature and rated temperature rise, are set when the power equipment is operated at 100% load, and do not apply temperature standards based on the actual operating load of the power equipment. For example, if the current load rate of the power equipment is 30% and the detected temperature is below the rated allowable temperature set based on a load rate of 100%, it is judged to be normal. However, in reality, when considering the load rate, it is an overheating abnormality, and this has the limitation that it is difficult to predict the abnormality in advance because as the load rate of the power equipment increases, the temperature rises beyond the rated allowable temperature at a very rapid rate. FIG. 1 is an example diagram of the configuration of hardware that is the subject of the present invention. Figure 2 is a flowchart of a method for determining abnormalities in power equipment using temperature detection according to the present invention. FIG. 3 is a flowchart of a method for determining an abnormality in power equipment using temperature detection according to another embodiment of the present invention. To fully understand the structure and effects of the present invention, preferred embodiments of the present invention are described with reference to the attached drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various forms and various modifications can be made. The description of the embodiments is provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention. In the attached drawings, components are depicted enlarged from their actual size for convenience of explanation, and the proportions of each component may be exaggerated or reduced. Terms such as 'first' and 'second' may be used to describe various components, but said components should not be limited by said terms. These terms may be used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, 'first component' may be named 'second component,' and similarly, 'second component' may be named 'first component.' Furthermore, singular expressions include plural expressions unless the context clearly indicates otherwise. Unless otherwise defined, terms used in the embodiments of the present invention may be interpreted in the sense commonly known to those skilled in the art. The present invention relates to a method for determining abnormalities in power equipment using temperature detection, which is performed by a central processing unit (or processor) of a computing device; and in the following description, even if there is no specific mention of the entity performing the operation of the present invention, the entity performing the operation shall be the central processing unit. Hereinafter, a method for determining an abnormality in power equipment using temperature detection according to one embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is an example diagram of the configuration of hardware that is the subject of the present invention, and FIG. 2 is a flowchart of a method for determining an abnormality in power equipment using temperature detection of the present invention. Referring to FIG. 1 and FIG. 2 respectively, the present invention may include an image acquisition unit (10) for acquiring a thermal image of a power facility, a load calculation unit (20) for calculating the current load rate of the power facility, a reference calculation unit (30) for calculating an allowable temperature rise for each current load rate, and an abnormality determination unit (4