A method for outdoor insulator fault detection based on temperature analysis

Abstract

The present invention provides an outdoor insulator fault detection method based on temperature analysis, comprising the following steps: (1): collecting the temperature signal of the insulator; (2): calculating the temperature rise of the insulator; (3): judging whether the insulator is abnormal according to the temperature rise, if so, entering (4); if not, returning to (1); (4): classifying the temperature rise according to the position of the temperature rise and the shape of the temperature rise area; (5): determining the insulator fault level in combination with the temperature rise. The present invention provides an outdoor insulator fault detection method based on temperature analysis, which can accurately judge whether the insulator is abnormal and the degree and position of the abnormality, so as to take effective measures in time to ensure the safe and reliable operation of the insulator.

Description

Technical Field

[0001] The invention belongs to the technical field of power detection, and in particular relates to an outdoor insulator fault detection method based on temperature analysis. Background Art

[0002] As one of the important equipment of power transmission and distribution lines, the safe and reliable operation of insulators will directly affect the stability of power transmission and distribution lines and even the entire power system. In insulator status monitoring, people only consider the value of insulator temperature rise, which is easy to cause errors in the detection results and affect the normal operation of insulation.

[0003] The present invention proposes an outdoor insulator fault detection method based on temperature analysis, which collects the overall temperature of the insulator, preliminarily determines whether the insulator has abnormal noise through the temperature rise value, and then classifies the temperature rise according to the position of the temperature rise and the shape of the temperature rise area. Finally, the insulator fault level is determined in combination with the temperature rise value, so that effective measures can be taken in time to protect the safety and stability of the transmission line. Summary of the invention

[0004] The present invention provides an outdoor insulator fault detection method based on temperature analysis, which can accurately judge whether the insulator is abnormal and the degree and position of the abnormality, so as to take effective measures in time to ensure the safe and reliable operation of the insulator.

[0005] The present invention is specifically a method for detecting outdoor insulator faults based on temperature analysis, and the method for detecting outdoor insulator faults comprises the following steps:

[0006] Step (1): collecting a temperature signal of the insulator;

[0007] Step (2): calculating the temperature rise of the insulator;

[0008] Step (3): judging whether the insulator is abnormal according to the temperature rise, if so, proceeding to step (4); if not, returning to step (1);

[0009] Step (4): classifying the temperature rise according to the location of the temperature rise and the shape of the temperature rise area;

[0010] Step (5): Determine the insulator fault level in combination with the temperature rise.

[0011] The insulator is collected by drone for overall temperature scanning and collection, and the insulator position information or equipment number is uploaded.

[0012] The specific method of judging whether the insulator is abnormal according to the temperature rise in step (3) is: judging whether the temperature rise is greater than 0.5° C., and if so, the insulator is abnormal.

[0013] According to the collected overall temperature of the insulator, the temperature region with a temperature greater than 0.5° C. is extracted as the temperature rise region, and the temperature rise region is morphologically classified into point-like temperature rise, columnar temperature rise and sheet-like temperature rise.

[0014] The specific method for morphologically classifying the temperature rise area is as follows:

[0015] First, the area of ​​the temperature rise region is calculated;

[0016] Secondly, it is determined whether the area of ​​the temperature rise region is smaller than the reference value of the temperature rise region area. If so, the temperature rise region is the point-shaped temperature rise.

[0017] Again, calculate the difference between the horizontal length and the vertical length of the temperature rise area, and determine whether the difference between the horizontal length and the vertical length is less than the length reference value. If so, the temperature rise area is the sheet-like temperature rise; if not, the temperature rise area is the columnar temperature rise.

[0018] The specific method of temperature rise classification in step (4) is:

[0019] (1) Determine whether the temperature rise position is between the high-voltage end fitting and the 10th shed skirt at the high-voltage end. If so, proceed to (2); if not, proceed to (3);

[0020] (2) determining whether the temperature rise region is the columnar temperature rise; if so, the temperature rise is the third type of temperature rise; if not, the temperature rise is the second type of temperature rise;

[0021] (3) determining whether the temperature rise region is the sheet-like temperature rise; if so, the temperature rise is a type I temperature rise; if not, proceeding to (4);

[0022] (4) Determine whether the temperature rise area is the point-shaped temperature rise. If so, the temperature rise is the third category temperature rise; if not, the temperature rise is the fourth category temperature rise.

[0023] The specific method for determining the insulator fault level in combination with the temperature rise is:

[0024] If the temperature rise is a Class I temperature rise, if the temperature rise is between 0.5-1°C, the insulator has a slight defect; if the temperature rise is between 1-3°C, the insulator has a general defect; if the temperature rise is between 3-5°C, the insulator has a moderate defect; if the temperature rise is greater than 5°C, the insulator has a serious defect;

[0025] If the temperature rise is a Class II temperature rise, if the temperature rise is between 0.5-1°C, the insulator has a slight defect; if the temperature rise is between 1-3°C, the insulator has a general defect; if the temperature rise is between 3-5°C, the insulator has a moderate defect; if the temperature rise is greater than 5°C, the insulator has a serious defect;

[0026] If the temperature rise is a Class III temperature rise, if the temperature rise is between 0.5-1°C, the insulator has a general defect; if the temperature rise is between 1-3°C, the insulator has a moderate defect; if the temperature rise is between 3-5°C, the insulator has a serious defect; if the temperature rise is greater than 5°C, the insulator has an emergency defect;

[0027] If the temperature rise is a Category 4 temperature rise, if the temperature rise is between 0.5-1°C, the insulator has a moderate defect; if the temperature rise is between 1-3°C, the insulator has a serious defect; if the temperature rise is between 3-5°C, the insulator has an emergency defect; if the temperature rise is greater than 5°C, the insulator has an emergency defect.

[0028] Compared with the prior art, the beneficial effect is: the outdoor insulator fault detection method collects the overall temperature of the insulator, preliminarily determines whether the insulator has abnormal noise through the temperature rise value, and then classifies the temperature rise according to the position of the temperature rise and the shape of the temperature rise area, and finally determines the insulator fault level in combination with the temperature rise value. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The present invention is a flowchart of a method for detecting outdoor insulator faults based on temperature analysis. DETAILED DESCRIPTION

[0030] The specific implementation of an outdoor insulator fault detection method based on temperature analysis of the present invention is described in detail below with reference to the accompanying drawings.

[0031] like Figure 1 As shown, the outdoor insulator fault detection method of the present invention comprises the following steps:

[0032] Step (1): collecting a temperature signal of the insulator;

[0033] Step (2): calculating the temperature rise of the insulator;

[0034] Step (3): Determine whether the temperature rise is greater than 0.5°C. If so, proceed to step (4); if not, return to step (1);

[0035] Step (4): according to the collected overall temperature of the insulator, extract the temperature region with a temperature greater than 0.5° C. as the temperature rise region, and classify the temperature rise region into the following types: point-shaped temperature rise, columnar-shaped temperature rise, and sheet-shaped temperature rise;

[0036] The temperature rise is classified as follows:

[0037] (1) Determine whether the temperature rise position is between the high-voltage end fitting and the 10th shed skirt at the high-voltage end. If so, proceed to (2); if not, proceed to (3);

[0038] (2) determining whether the temperature rise region is the columnar temperature rise; if so, the temperature rise is the third type of temperature rise; if not, the temperature rise is the second type of temperature rise;

[0039] (3) determining whether the temperature rise region is the sheet-like temperature rise; if so, the temperature rise is a type I temperature rise; if not, proceeding to (4);

[0040] (4) Determine whether the temperature rise area is the point-shaped temperature rise. If so, the temperature rise is the third category temperature rise; if not, the temperature rise is the fourth category temperature rise.

[0041] Step (5): Determine the fault level of the insulator in combination with the temperature rise: if the temperature rise is a Class I temperature rise, if the temperature rise is between 0.5-1°C, the insulator has a slight defect; if the temperature rise is between 1-3°C, the insulator has a general defect; if the temperature rise is between 3-5°C, the insulator has a moderate defect; if the temperature rise is greater than 5°C, the insulator has a serious defect;

[0042] If the temperature rise is a Class II temperature rise, if the temperature rise is between 0.5-1°C, the insulator has a slight defect; if the temperature rise is between 1-3°C, the insulator has a general defect; if the temperature rise is between 3-5°C, the insulator has a moderate defect; if the temperature rise is greater than 5°C, the insulator has a serious defect;

[0043] If the temperature rise is a Class III temperature rise, if the temperature rise is between 0.5-1°C, the insulator has a general defect; if the temperature rise is between 1-3°C, the insulator has a moderate defect; if the temperature rise is between 3-5°C, the insulator has a serious defect; if the temperature rise is greater than 5°C, the insulator has an emergency defect;

[0044] If the temperature rise is a Category 4 temperature rise, if the temperature rise is between 0.5-1°C, the insulator has a moderate defect; if the temperature rise is between 1-3°C, the insulator has a serious defect; if the temperature rise is between 3-5°C, the insulator has an emergency defect; if the temperature rise is greater than 5°C, the insulator has an emergency defect.

[0045] The insulator is collected by drone for overall temperature scanning and collection, and the insulator position information or equipment number is uploaded.

[0046] The specific method for morphologically classifying the temperature rise area is as follows:

[0047] First, the area of ​​the temperature rise region is calculated;

[0048] Secondly, it is determined whether the area of ​​the temperature rise region is smaller than the reference value of the temperature rise region area. If so, the temperature rise region is the point-shaped temperature rise.

[0049] Again, calculate the difference between the horizontal length and the vertical length of the temperature rise area, and determine whether the difference between the horizontal length and the vertical length is less than the length reference value. If so, the temperature rise area is the sheet-like temperature rise; if not, the temperature rise area is the columnar temperature rise.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit the present invention. A person skilled in the art should understand that the specific implementation of the present invention can be modified or replaced by equivalents, but these modifications or changes are within the scope of protection of the pending claims.

Claims

1. A method for detecting outdoor insulator faults based on temperature analysis, characterized in that: The outdoor insulator fault detection method comprises the following steps: Step (1): collecting the temperature signal of the insulator; Step (2): calculating the temperature rise of the insulator; Step (3): judging whether the insulator is abnormal according to the temperature rise: Determine whether the temperature rise is greater than 0.5°C. If so, the insulator is abnormal and proceed to step (4); if not, return to step (1); Step (4): Classify the temperature rise according to the location of the temperature rise and the shape of the temperature rise area: According to the collected overall temperature of the insulator, the temperature region with a temperature greater than 0.5°C is extracted as the temperature rise region, and the temperature rise region is classified into point-shaped temperature rise, columnar-shaped temperature rise and sheet-shaped temperature rise, specifically: First, the area of ​​the temperature rise region is calculated; Secondly, it is determined whether the area of ​​the temperature rise region is smaller than the reference value of the temperature rise region area. If so, the temperature rise region is the point-shaped temperature rise. Thirdly, the difference between the horizontal length and the vertical length of the temperature rise area is calculated to determine whether the difference between the horizontal length and the vertical length is less than the length reference value. If so, the temperature rise area is the sheet-shaped temperature rise; if not, the temperature rise area is the columnar temperature rise; The specific method of temperature rise classification is: (1) Determine whether the temperature rise is between the high-voltage end fitting and the 10th shed skirt at the high-voltage end. If so, proceed to (2); if not, proceed to (3); (2) determining whether the temperature rise area is the columnar temperature rise; if so, the temperature rise is the third type of temperature rise; if not, the temperature rise is the second type of temperature rise; (3) Determine whether the temperature rise area is the sheet-like temperature rise. If so, the temperature rise is a type I temperature rise. If not, proceed to (4). (4) Determine whether the temperature rise area is the point-shaped temperature rise. If so, the temperature rise is the third category temperature rise; if not, the temperature rise is the fourth category temperature rise; Step (5): Determine the insulator fault level in combination with the temperature rise, the specific method is as follows: If the temperature rise is a Class I temperature rise, if the temperature rise is between 0.5-1°C, the insulator has a slight defect; if the temperature rise is between 1-3°C, the insulator has a general defect; if the temperature rise is between 3-5°C, the insulator has a moderate defect; if the temperature rise is greater than 5°C, the insulator has a serious defect; If the temperature rise is a Class II temperature rise, if the temperature rise is between 0.5-1°C, the insulator has a slight defect; if the temperature rise is between 1-3°C, the insulator has a general defect; if the temperature rise is between 3-5°C, the insulator has a moderate defect; if the temperature rise is greater than 5°C, the insulator has a serious defect; If the temperature rise is a Class III temperature rise, if the temperature rise is between 0.5-1°C, the insulator has a general defect; if the temperature rise is between 1-3°C, the insulator has a moderate defect; if the temperature rise is between 3-5°C, the insulator has a serious defect; if the temperature rise is greater than 5°C, the insulator has an emergency defect; If the temperature rise is a Category 4 temperature rise, if the temperature rise is between 0.5-1°C, the insulator has a moderate defect; if the temperature rise is between 1-3°C, the insulator has a serious defect; if the temperature rise is between 3-5°C, the insulator has an emergency defect; if the temperature rise is greater than 5°C, the insulator has an emergency defect.

2. The outdoor insulator fault detection method based on temperature analysis according to claim 1 is characterized in that: The insulator is collected by drone for overall temperature scanning and collection, and the insulator position information or equipment number is uploaded.

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