Line insulator operation condition ground detection method

A technology of operating conditions and line insulation, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve problems such as complex time-consuming, low sensitivity, and high requirements for detection conditions, so as to reduce work intensity and solve problems with low sensitivity Effect

Inactive Publication Date: 2020-05-29
PINGDINGSHAN POWER SUPPLY ELECTRIC POWER OF HENAN
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above-mentioned prior art, the problem to be solved by the present invention is to provide a ground detection method for line insulator operating conditions, which is used for detection of 110-220KV transmission line insulators, so as to solve the problem of low sensitivity, complexity and time-consuming of existing detection methods, and Problems that are destructive and require high detection conditions

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Embodiment 1

[0034] A ground detection method for line insulator operating conditions, which uses a high-frequency pulse signal detection device to detect the grounding loop of a tower, collects the characteristic spectrum of the pulse signal of the line insulator, and analyzes the collected spectrum data to obtain the characteristics of the porcelain fault insulator Spectrum, find out the zero-value insulator; analyze the characteristic spectrum of the porcelain insulator collected, the pulse signal is in 3MHZ-5MHZ, and the pulse signal amplitude exceeds 50,000 to determine that there is a faulty insulator on the tower. like figure 2 As shown, the detected porcelain insulators have faulty insulators, and the characteristic spectrum appears obviously at 3MHZ-5MHZ and the pulse amplitude exceeds 5W. It can be judged that there is a zero-value insulator at the tower. like image 3 As shown, the detected porcelain insulator has no obvious characteristic spectrum in 3MHZ-5MHZ, and there is n...

Embodiment 2

[0036] According to the characteristic spectrum of the insulator, find out the characteristic spectrum of the abnormal composite insulator, and analyze the operation status of the composite insulator; the pulse signal contains 2V, and the pulse signal continues to appear to determine that the composite insulator on the tower is seriously polluted, according to the number of 2V pulse signals Judging the pollution degree of the composite insulator, if there are more than 10 2V pulse signals at the same phase angle multiple times, it will be judged that there will be a pollution flash trip fault. like Figure 4 As shown, the pulse signal contains 2V and more than 10 2V pulse signals frequently appear at the same phase angle, so it is judged that the insulator will have a pollution flashover fault in long-term operation.

Embodiment 3

[0038] Find out the characteristic spectrum of the fault composite insulator according to the characteristic spectrum of the insulator, and judge that the fault is a composite insulator; the pulse signal contains 3V, and the pulse signal continues to appear to judge that the composite insulator of the tower is aging, and judge the composite insulator according to the number of 3V pulse signals Aging degree, if more than one 3V pulse signal appears multiple times at the same phase angle, it will be judged that an insulator breakdown trip fault will occur. like Figure 5 As shown, the pulse signal contains 3V, and two 3V pulse signals frequently occur at the same phase angle. It can be judged that the composite insulator here will break down and trip.

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Abstract

The invention provides a line insulator operation condition ground detection method which comprises the steps of detecting the grounding loop of a tower by using a high-frequency pulse signal detection device, and acquiring the characteristic frequency spectrum of the pulse signal of a line insulator; analyzing the acquired frequency spectrum data to obtain the characteristic frequency spectrum ofthe porcelain fault insulator, and finding out a zero-value insulator; finding out an abnormal composite insulator characteristic frequency spectrum, and analyzing the operation condition of the composite insulator; finding out a characteristic frequency spectrum of the fault composite insulator, and judging the fault composite insulator; and analyzing the spectral characteristics of the composite insulator to judge the running age limit range of the insulator, and formulating an overhaul strategy according to the aging degree of the insulator. The method is used for detecting the 110-220KV power transmission line insulator and can solve the problems that the existing detection method is low in sensitivity, complex, time-consuming, destructive and high in detection condition requirement.According to the method, the defects in the insulator are effectively judged, response is made at the first time and the working intensity is reduced.

Description

technical field [0001] The invention belongs to the field of live detection of power transmission lines, in particular to a method for ground detection of line insulator operating conditions. Background technique [0002] Insulators are special insulation controls that can play an important role in overhead transmission lines. Insulators are made of ceramic, glass or composite materials; during use, the insulator should not fail due to various electromechanical stresses caused by changes in the environment and electrical load conditions, otherwise the insulator will not have a significant effect and will damage the entire line Therefore, regular use of non-destructive testing means to monitor and detect the operation of insulators, and to detect potential failures as early as possible can avoid threatening the safety of the power grid due to insulator failures. [0003] At present, non-destructive testing methods for insulators include electric field distribution testing me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1245
Inventor 裴继东蒋延磊银高胜王锴张文刚陈越健张军彭磊亚朱亚丽梁璐张世坤王莹秋韩贝贝王慧娴
Owner PINGDINGSHAN POWER SUPPLY ELECTRIC POWER OF HENAN
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