An adjustable insulator leakage current segmented detection device, method and equipment

Abstract

The application relates to an adjustable insulator leakage current segmented detection device, method and equipment, which comprises a fixed part and a detection part, the fixed part comprises a fixed ring and at least three adjusting parts, the at least three adjusting parts are circumferentially arranged on the side wall of the fixed ring; the detection part comprises a plurality of detection parts, a plurality of first conductive coatings and a detection module, the plurality of first conductive coatings are circumferentially and equidistantly arranged on one end surface of the fixed ring; the plurality of detection parts are circumferentially arranged on the side wall of the fixed ring, each detection part corresponds to a section of the first conductive coating, and each detection part is electrically connected with the first conductive coating at the corresponding position; and the detection part is electrically connected with the detection module. The application realizes the segmented detection of the insulator surface leakage current, can accurately position the area where the fault such as pollution flashover occurs, and through the segmented detection, the source of the leakage current can be more accurately positioned, so that the detection accuracy is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of insulator detection equipment, in particular to an adjustable insulator leakage current segmented detection device, method and equipment. BACKGROUND

[0002] The insulator on the high-voltage transmission line not only plays an electrical insulation role, but also plays a mechanical support role, to ensure that the transmission line can also operate normally when overvoltage occurs, the working state of the insulator plays a crucial role in the safety and reliability of the power network.

[0003] The insulator is exposed to the open air for a long time, and wet flash and pollution flash accidents occur from time to time. Pollution flash refers to the pollution of the surface of the electric porcelain of the power equipment by solid, liquid or gas conductive substances, when the humidity becomes larger, the leakage current becomes larger, and partial discharge is generated. Under the operating voltage, the partial discharge on the surface of the porcelain piece can develop into an arc and flashover. The cracks and even the rupture of the insulator will directly lead to the decrease of the insulation capacity of the insulator, and seriously affect the safe operation of the power system.

[0004] In the prior art, due to the large size difference of the insulator, the leakage current detection device cannot be flexibly installed and used, and the leakage current is easily affected by electromagnetic interference, and without signal shielding treatment, the detection result will be greatly deviated. The traditional insulator maintenance mode is mainly periodical maintenance and cleaning, and cannot timely issue an alarm information before the insulator appears a safety hazard. SUMMARY

[0005] Therefore, the technical problem to be solved by the present application is to overcome the defect that the detection of the insulator in the prior art cannot be accurately positioned, resulting in poor detection accuracy.

[0006] To solve the above technical problems, the present application provides an adjustable insulator leakage current segmented detection device, comprising:

[0007] A fixing part, the fixing part comprises a fixing ring and at least three adjusting pieces, and the at least three adjusting pieces are circumferentially arranged on the side wall of the fixing ring;

[0008] A detection part, the detection part comprises a plurality of detection pieces, a plurality of first conductive coatings and a detection module, the plurality of first conductive coatings are circumferentially and equidistantly arranged along one end face of the fixing ring; the plurality of detection pieces are circumferentially arranged on the side wall of the fixing ring, each detection piece corresponds to a section of the first conductive coating, and each detection piece is electrically connected with the first conductive coating at the corresponding position; and the detection piece is electrically connected with the detection module.

[0009] In an embodiment of the present application, the fixing ring comprises at least two arc-shaped rings, and any two arc-shaped rings are detachably connected.

[0010] In one embodiment of the present application, a first threaded hole is formed in the sidewall of the fixing ring and cooperates with the adjusting member.

[0011] In one embodiment of the present application, a second threaded hole is formed in the sidewall of the fixing ring and cooperates with the detecting member, the second threaded hole is internally provided with a second conductive coating, and the first conductive coating is in conduction with the second conductive coating.

[0012] In one embodiment of the present application, a signal shielding wire is arranged between the detecting member and the detecting module, the signal shielding wire comprises a conductor, and the outer side of the conductor is sequentially coated with a shielding layer, an armored layer and an insulating layer.

[0013] In one embodiment of the present application, the first conductive coating and the second conductive coating are integrally formed.

[0014] An insulator leakage current segmented detection method is used for detecting the adjustable insulator leakage current segmented detection device, and comprises the following steps:

[0015] S1: assembling the fixing ring and sleeving the fixing ring outside the steel cap of the insulator to be detected;

[0016] S2: adjusting the plurality of adjusting members according to the diameter of the steel cap of the insulator to be detected, fixing the fixing ring outside the steel cap of the insulator to be detected, and tightly abutting the surface of the insulator to be detected on the side of the fixing ring provided with the first conductive coating;

[0017] S3: sequentially connecting any two adjacent detecting members with the detecting module, and judging the leakage current of the insulator in the corresponding area according to the feedback of each group of detection signals.

[0018] An insulator leakage current segmented detection device comprises the adjustable insulator leakage current segmented detection device.

[0019] The above technical scheme of the present application has the following advantages compared with the prior art:

[0020] The adjustable insulator leakage current segmented detection device, method and equipment of the present application realize the segmented detection of the surface leakage current of the insulator, can accurately locate the area where the fault such as pollution flashover occurs, and through the segmented detection, the source of the leakage current can be more accurately located, thereby improving the detection accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to make the content of the present application more easily understood, the present application will be further described in detail below according to specific embodiments of the present application and in combination with the drawings, in which

[0022] Figure 1It is the overall structure schematic diagram of the present application;

[0023] Figure 2 For Figure 1 The structure schematic diagram of the fixed part in the middle is shown;

[0024] Figure 3 For Figure 2 The side view of the fixed ring in the middle is shown;

[0025] Figure 4 For Figure 1 The structure schematic diagram of the detection part in the middle is shown;

[0026] Figure 5 For Figure 4 The structure schematic diagram of the signal shielding line in the middle is shown;

[0027] Description of the drawings: 1, fixed part;2, detection part;11, fixed ring;12, adjusting part;21, detection part;22, first conductive coating;23, detection module;24, second conductive coating;25, signal shielding line;111, arc ring;112, first threaded hole;113, second threaded hole;251, conductor;252, shielding layer;253, armored layer;254, insulating layer. DETAILED DESCRIPTION

[0028] The present application will be further described below in conjunction with the drawings and specific examples, so that those skilled in the art can better understand the present application and can be implemented, but the examples are not as a limitation on the present application. Example one

[0029] Referring to Figures 1-5 The present application discloses a kind of adjustable insulator leakage current segmented detection device, including:

[0030] Fixed part 1, the fixed part 1 includes fixed ring 11 and at least three adjusting parts 12, at least three the adjusting part 12 is circumferentially arranged in the side wall of the fixed ring 11;

[0031] Detection part 2, the detection part 2 includes multiple detection parts 21, multiple first conductive coatings 22 and detection module 23, multiple the first conductive coating 22 is circumferentially equidistantly arranged along one end surface of the fixed ring 11;Multiple the detection part 21 is circumferentially arranged in the side wall of the fixed ring 11, each detection part 21 corresponds a section of the first conductive coating 22, and each detection part 21 is electrically connected with the first conductive coating 22 of corresponding position;The detection part 21 is electrically connected with the detection module 23.

[0032] The structure of the whole fixing part 1 in the application is formed by supporting the fixing ring 11, and then fixed by the adjusting member 12 arranged in the circumference. In actual use, according to the size of the nut of the insulator to be detected, the length of the adjusting member 12 penetrating through the fixing ring 11 is adjusted, so that the end of the adjusting member 12 abuts against the nut of the insulator, and the fixing ring 11 is fixed outside the nut of the insulator. In order to ensure the stability of the connection between the fixing ring 11 and the insulator, the adjusting member 12 in the application is provided with at least three, so as to avoid loosening of the fixing ring 11 during detection, affect the detection result, and improve the stability during detection.

[0033] The plurality of detection members 21 in the detection part 2 are arranged equidistantly in the circumference on the fixing ring 11, the first conductive coating 22 is arranged on one end face of the fixing ring 11, the first conductive coating 22 is arranged equidistantly on the surface of the fixing ring 11, and each section of the first conductive coating 22 corresponds to one detection member 21. In the detection process, the side with the first conductive coating 22 is closely attached to the surface of the insulator, and the plurality of detection members 21 divide the insulator into a plurality of different areas, and a detection area is formed between any two detection members 21. In the application, the fixing ring 11 is divided into six detection areas, and the segmented detection helps to more accurately locate the source of the leakage current, thereby improving the accuracy of detection.

[0034] The adjustable insulator leakage current segmented detection device provided in the application realizes the detection of the leakage current on the surface of the insulator in different areas, can accurately locate the area where the pollution flashover fault occurs, and has the advantages that: through segmented detection, the source of the leakage current can be more accurately located, thereby improving the accuracy of detection; it is helpful to identify potential fault points on the surface of the insulator, provide important information for early warning of pollution flashover, better plan the maintenance period of the equipment, realize preventive maintenance, and reduce sudden failures; it is helpful to timely find and handle the leakage current, can prevent electrical accidents, ensure the safety of operators and users, help to reduce the aging and damage of the insulator, prolong the service life of the equipment, and ensure the reliable operation of the power system. In addition, the adjustable insulator leakage current segmented detection device in the application can be combined with an automatic system to realize remote monitoring and automatic alarm, and improve the detection efficiency.

[0035] Further, the fixing ring 11 comprises at least two arc-shaped rings 111, and any two arc-shaped rings 111 are detachably connected.

[0036] Specifically, the fixing ring 11 in the application is a multi-segment structure, which is convenient for adapting to the insulator with a larger size during detection, and is convenient for disassembly. As a preferred scheme of the application, any two arc-shaped rings 111 are connected by bolts.

[0037] Further, a first threaded hole 112 is formed in the sidewall of the fixing ring 11 and cooperates with the adjusting member 12.

[0038] Specifically, the adjusting member 12 can fix the screw cap of the insulator of different sizes through the first threaded hole 112.

[0039] Further, a second threaded hole 113 is formed in the sidewall of the fixing ring 11 and cooperates with the detecting member 21, and a second conductive coating 24 is arranged in the second threaded hole 113, and the first conductive coating 22 and the second conductive coating 24 are in conduction.

[0040] Specifically, the second threaded hole 113 is used for mounting the detecting member 21. Since the second threaded hole 113 is formed along the sidewall of the fixing ring 11, and the first conductive coating 22 is arranged on the end face of the fixing ring 11, the detecting member 21 and the first conductive coating 22 are in conduction through the second conductive coating 24 arranged in the second threaded hole 113.

[0041] Further, a signal shielding wire 25 is arranged between the detecting member 21 and the detection module 23, and the signal shielding wire 25 comprises a conductor 251, and the outer side of the conductor 251 is sequentially covered with a shielding layer 252, an armored layer 253 and an insulating layer 254.

[0042] The leakage current detection is often interfered by the electromagnetic interference of the power transmission line, and it is difficult to guarantee the detection precision. In the present application, the connection between the detecting member 21 and the detection module 23 is connected through the signal shielding wire 25, so as to reduce the interference of the signal in the detection process. Specifically, the detection cable with the armored layer 253 and the shielding layer 252 can greatly improve the precision of the leakage current detection. The use of the armored shielding detection cable realizes the detection of the leakage current of more than 10 mu A, which reflects the wide detection range, high sensitivity and strong protection of the detection device.

[0043] As a preferred scheme of the present application, the material of the shielding layer 252 is copper mesh, and the material of the armored layer 253 is aluminum strip. The material of the fixing ring 11 is ceramic. As an excellent insulating material, the ceramic can avoid the interference of signals between the plurality of first conductive coatings 22. In addition, the material of the fixing ring 11 can also be a non-conductive material such as glass.

[0044] Further, the first conductive coating 22 and the second conductive coating 24 are integrally formed, and the components of the first conductive coating 22 and the second conductive coating 24 are both nickel alloy. The nickel alloy material has good conductivity and wear resistance. Embodiment two

[0045] A kind of insulator leakage current segmented detection method, for detecting the adjustable insulator leakage current segmented detection device described in embodiment one, comprising:

[0046] S1: fixed ring 11 is assembled, and fixed ring 11 is set in the steel cap outside the insulator to be measured;

[0047] In step S1, multiple arc-shaped rings 111 are assembled, set in the outer side of the nut of one side of the insulator to be measured, to facilitate the fixation of subsequent fixed ring 11.

[0048] S2: according to the diameter of the steel cap of the insulator to be measured, adjust multiple described adjusting piece 12, the fixed ring 11 is fixed at the steel cap outside the insulator to be measured, and the side of the fixed ring 11 provided with first conductive coating 22 is tightly attached to the surface of the insulator to be measured;

[0049] In step S2, when adjusting multiple adjusting pieces 12, the same number of turns is sequentially screwed in clockwise direction to multiple adjusting pieces 12, to ensure that the length of adjusting piece 12 passing through fixed ring 11 is equal, and then to ensure the stability of fixed ring 11.It should be noted that before fixing adjusting piece 12, it is necessary to ensure that the first conductive coating 22 is completely attached to the surface of the insulator.

[0050] S3: sequentially connect any adjacent two detection pieces 21 with detection module 23, and judge the leakage current of the insulator in the corresponding area according to the feedback of each group of detection signals.

[0051] In step S3, the detection piece 21 in different positions corresponds to different detection areas of the insulator, and any adjacent two detection pieces 21 are detected in sequence in one direction, when the leakage current is generated on the surface of the insulator, the leakage current is transmitted to the corresponding detection piece 21 through the first conductive coating 22, and is transmitted to the detection module 23 through the signal shielding line 25, so as to realize the segmented detection of leakage current, to realize the accurate positioning and early warning of insulator pollution flashover fault. Embodiment three

[0052] A kind of insulator leakage current segmented detection equipment, including the adjustable insulator leakage current segmented detection device described in embodiment one.

[0053] In summary, the application introduces an adjustable insulator leakage current segmented detection device, method and equipment, which realizes the sub-area detection of the insulator surface leakage current and can accurately locate the area where the fault such as pollution flashover occurs. Through segmented detection, it is helpful to more accurately locate the source of leakage current, thereby improving the accuracy of detection; it is helpful to identify potential fault points on the insulator surface, provide important information for early warning of pollution flashover; it is helpful to better plan the maintenance period of the equipment, realize preventive maintenance and reduce sudden failures; it is helpful to timely discover and handle leakage current, can prevent electrical accidents, protect the safety of operators and users, help to reduce the aging and damage of insulators, prolong the service life of the equipment and ensure the reliable operation of the power system. In addition, the adjustable insulator leakage current segmented detection device can also be combined with an automatic system to realize remote monitoring and automatic alarm and improve the detection efficiency.

[0054] Obviously, the above embodiments are only examples for clearly illustrating, not limiting the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. An adjustable insulator leakage current segment detection device, characterized in that: include: A fixing portion, the fixing portion comprising a fixing ring and at least three adjusting members, wherein the at least three adjusting members are circumferentially arranged on a side wall of the fixing ring; the fixing ring comprises at least two arc-shaped rings, and any two arc-shaped rings are detachably connected; The detection part includes multiple detection parts, multiple first conductive coatings and a detection module, and the multiple first conductive coatings are equidistantly arranged along the circumferential direction of an end face of the fixing ring; the multiple detection parts are circumferentially arranged on the side wall of the fixing ring, each detection part corresponds to a section of the first conductive coating, and each detection part is electrically connected to the first conductive coating at the corresponding position; the detection part is electrically connected to the detection module; a signal shielding wire is arranged between the detection part and the detection module; the signal shielding wire includes a conductor, and the outer side of the conductor is sequentially covered with a shielding layer, an armor layer and an insulating layer; a second threaded hole cooperating with the detection part is opened on the side wall of the fixing ring, and a second conductive coating is arranged inside the second threaded hole, and the first conductive coating is connected to the second conductive coating; the first conductive coating and the second conductive coating are integrally formed.

2. The adjustable insulator leakage current segment detection device according to claim 1, characterized in that: A first threaded hole matching with the adjusting member is formed on the side wall of the fixing ring.

3. A segmented detection method for insulator leakage current, used for detecting the adjustable insulator leakage current segmented detection device according to any one of claims 1-2, characterized in that: include: S1: Assemble the fixing ring and put it on the outside of the steel cap of the insulator to be tested; S2: adjusting the plurality of adjusting members according to the diameter of the steel cap of the insulator to be tested, fixing the fixing ring to the outside of the steel cap of the insulator to be tested, with the side of the fixing ring provided with the first conductive coating in close contact with the surface of the insulator to be tested; S3: Connect any two adjacent detection components to the detection module in sequence, and determine the leakage current of the insulator in the corresponding area based on the feedback of each set of detection signals.

4. An insulator leakage current segment detection device, characterized in that: The device comprises the adjustable insulator leakage current segment detection device as described in any one of claims 1-2.

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