A detection device for detecting defects of a composite insulator under electrification

Abstract

The application discloses a kind of composite insulator defect live detection detection devices, comprising: power supply, signal processing module, four electric field probes and signal amplifier, four electric field probes are cross distribution, each electric field probe is connected signal processing module by a signal amplifier, signal processing module connects power supply, signal processing module includes microprocessor, data transparent transmission module.It is identified to composite insulator defect by matrix electric field detection mode, device structure is simple, portable, it can be used with unmanned aerial vehicle mounting and insulating operating pole, installed in unmanned aerial vehicle nacelle end portion or insulating operating pole end portion, detection result is sent to ground end or insulating pole operating end by data transparent transmission module, composite insulator defect is detected under live operation, so that problem insulator can be found early, to avoid potential fault hidden danger occurs.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of live detection, and particularly relates to a detection device for live detection of defects of composite insulators. BACKGROUND

[0002] Modern power transmission line and substation management pay great attention to the deterioration of composite insulators. Once the insulation performance of power equipment is reduced due to the deterioration of the insulation, it is extremely likely to cause accidents such as insulation flashover, and the resulting safety hazards and economic losses will be incalculable. Therefore, the good operation of composite insulators helps to ensure the safety and stability of the entire power system. In combination with the current construction of "ultra-high voltage" projects, "west-east power transmission" projects and strong smart grid, the trend of large-scale promotion of composite insulators in power transmission lines, the need for evaluation of the performance degradation and deterioration of composite insulators in complex environments, the strengthening of composite insulator monitoring and deterioration evaluation methods, and the efforts to eliminate all fault hazards are the keys to ensuring the normal operation of composite insulators and the stable operation of power systems.

[0003] At present, the power department mostly adopts the method of infrared imaging to detect the defects of composite insulators under live conditions. When the composite insulator is seriously deteriorated and serious heating occurs, infrared imaging has a good effect. However, infrared imaging cannot find early defects of composite insulators, such as internal conduction and surface carbonization, and the infrared imaging method has high requirements for the test environment, and is harsh for background noise and weather conditions. In addition to the infrared imaging method, there is currently no effective method and device to detect defects of composite insulators. SUMMARY

[0004] The purpose of the present application is to overcome the deficiencies in the prior art, and to provide a detection device for live detection of defects of composite insulators, which can be used with a unmanned aerial vehicle and an insulating operating rod, installed at the end of the unmanned aerial vehicle or the insulating operating rod, and the detection results are sent to the ground end or the insulating rod operating end through a data transparent transmission module, so that the defects of composite insulators can be detected under live operation, and potential fault hazards can be avoided.

[0005] To solve the problems in the prior art, the present application discloses a detection device for live detection of defects of composite insulators, which comprises a power supply, a signal processing module, four electric field probes and a signal amplifier. The four electric field probes are distributed in a cross shape, each electric field probe is connected to the signal processing module through a signal amplifier, the signal processing module is connected to the power supply, and the signal processing module comprises a microprocessor and a data transparent transmission module.

[0006] Further, the signal processing module, the four electric field probes and the signal amplifier are arranged in the inner cavity of the shell, and the shell is connected with the baffle outside.

[0007] Further, the baffle is cross-shaped, and the end thereof is provided with a bending part.

[0008] Further, the power supply comprises a power supply interface and a stabilized inverter module, the power supply interface is arranged outside the shell, and the stabilized inverter module is arranged in the inner cavity of the shell.

[0009] Further, the signal amplifier is model INA333.

[0010] Further, the microprocessor is model ARM Coretex-M3.

[0011] Further, the data transmission module is model E22-400T22S.

[0012] Further, the stabilized inverter module is model TPS562200.

[0013] Further, the unmanned aerial vehicle for mounting the detection device is further included.

[0014] Further, the insulated operating rod for mounting the detection device is further included.

[0015] The present application has the beneficial effects:

[0016] The present application can detect the internal defects of the composite insulator under the live operation condition, and avoid the occurrence of potential fault hidden danger. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a circuit structure schematic diagram of the present application;

[0018] Figure 2 It is a structure schematic diagram of the present application;

[0019] Figure 3 It is a structure schematic diagram of the present application;

[0020] Figure 4 It is a use state schematic diagram of the present application;

[0021] Figure 5 It is a use state schematic diagram of the present application;

[0022] Figure 6 It is an unmanned aerial vehicle mounting schematic diagram of the present application;

[0023] Figure 7 It is an insulated operating rod mounting schematic diagram of the present application.

[0024] The components are: 1. Electric field probe; 2. Signal amplifier; 3. Microprocessor; 4. Data transmission module; 5. Voltage regulator inverter module; 6. Insulated inner shell; 11. Outer shell; 22. Baffle; 22-1. Bending part; A. Detection device of the present invention; B. Tower crossarm. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0026] like Figure 1 As shown, the present invention discloses a detection device for live detection of defects in composite insulators, comprising: a power supply, a signal processing module, four electric field probes 1, and a signal amplifier 2. The four electric field probes 1 are arranged in a cross shape. Each electric field probe 1 is connected to the signal processing module through a signal amplifier 2. The signal processing module is connected to the power supply. The signal processing module includes a microprocessor 3 and a data transmission module 4. The electric field probes 1 collect the electric field intensity signal near the surface of the composite insulator, convert it into a millivolt voltage signal, and then send the detection signal to the microprocessor 3 through the four signal amplifiers 2. The microprocessor 3 internally runs a corresponding identification algorithm and sends the defect detection result out through the data transmission module 4. The signal amplifier 2 is an INA333. The microprocessor 3 is an ARM Cortex-M3. The data transmission module 4 is an E22-400T22S. The voltage regulator inverter module 5 is a TPS562200.

[0027] Suppose the electric field data measured by the four electric field probes are E1, E2, E3, and E4, then the following equation is satisfied, indicating that there is core rod carbonization or internal conductive defect at the location of the detection device:

[0028]

[0029]

[0030]

[0031]

[0032] k is the proportionality coefficient, which can be 0.05.

[0033] Furthermore, during on-site operation, the presence of black ablation marks at the detection location of the invention can be observed using visible light images. If no such marks are found, the defect can be considered an internal conductivity defect. Otherwise, it is a core rod carbonization defect.

[0034] like Figures 2-3As shown, the signal processing module, the four electric field probes 1 and the signal amplifier 2 are arranged in the inner cavity of the shell 11, the outside of the shell 11 is connected with the baffle 22, the power supply includes the power supply interface 33 and the voltage stabilizing inverter module 5, the power supply interface 33 is arranged outside the shell 11, and the voltage stabilizing inverter module 5 is arranged in the inner cavity of the shell 11. After the external power supply is connected to the power supply interface 33, different sizes of direct voltages are generated through the voltage stabilizing inverter module 5, so that the signal amplifier 2, the microprocessor 3 and the data transparent transmission module 4 work. The baffle 22 is used to ensure that the detection device can smoothly move along the outer edge of the shed of the composite insulator without being stuck, and the baffle 22 is in the shape of a cross, and the end portion is provided with a bending portion 22-1.

[0035] As Figures 4-5 shown, when the composite insulator defect live detection is performed by using the device, it is only necessary to ensure that the device can translate along the outer edge of the shed of the composite insulator. The four-array probe and the baffle of the device adopt a cross-shaped structure, which can meet the detection of different string-type composite insulators, such as a suspension string and a V-shaped string. The distance between the sheds of the normal composite insulator is between 3-5 cm, so the diameter of the four-array structure of the device can be 5 cm, so that the defect condition of at least a section of the core rod-shed unit can be detected. The diameter of the baffle of the device can be 8-12 cm, which is greater than the diameter of the shell, because the sheds of some composite insulators are large and small umbrella structures, and the spacing between the two large umbrellas can exceed 5 cm, that is, the size exceeds the size of the detection device shell. In this case, the detection device can be stuck in the shed.

[0036] As Figures 6-7 shown, the present application provides a detection device for composite insulator defect live detection, which can recognize the composite insulator defect through a matrix electric field detection method. The device has simple structure and is easy to use. It can be used with a unmanned aerial vehicle and an insulating operating rod. It is installed at the end of the unmanned aerial vehicle or the insulating operating rod. The detection result is sent to the ground end or the insulating rod operating end through the data transparent transmission module. The composite insulator defect is detected under live operation, so that the problem insulator can be found early, and potential fault hidden dangers can be avoided.

[0037] It is to be understood that the terminology used herein such as first and second, and the like, is only intended to distinguish one entity or action from another entity or action, without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Also, in the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on the orientations or positional relationships as shown in the drawings and are merely used for convenience in describing the present application and simplifying the description, and do not indicate or imply that a referred device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application. In the drawings of the present application, the filling patterns are only for distinguishing the layers and do not have any other limitations.

[0038] While the embodiments of the present application have been shown and described, it is to be understood that the embodiments can be modified, substituted, replaced, and changed in various ways without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A detection device for detecting live defects in composite insulators, characterized in that, include: The system includes a power supply, a signal processing module, four electric field probes (1) and a signal amplifier (2). The four electric field probes (1) are arranged in a cross shape. Each electric field probe (1) is connected to the signal processing module through a signal amplifier (2). The signal processing module is connected to the power supply. The signal processing module includes a microprocessor (3) and a data pass-through module (4). The electric field data measured by the four electric field probes (1) are E1, E2, E3, and E4, respectively. When the following formula is satisfied, it is considered that there is a core rod carbonization defect or internal conduction defect at the location of the detection device: ； k is the proportionality coefficient, which is set to 0.05; During on-site operation, observe the detection location for black ablation marks using visible light images. If no such marks are found, the defect is considered to be an internal conduction defect; otherwise, it is considered to be a core rod carbonization defect.

2. A detection device for detecting live defects in composite insulators according to claim 1, characterized in that: It also includes a housing (11) and a baffle (22). The signal processing module, four electric field probes (1) and the signal amplifier (2) are all located in the inner cavity of the housing (11), and the outer side of the housing (11) is connected to the baffle (22).

3. A detection device for detecting live defects in composite insulators according to claim 2, characterized in that: The baffle (22) is cross-shaped and has a curved part (22-1) at its end.

4. A detection device for detecting live defects in composite insulators according to claim 2, characterized in that: The power supply includes a power supply interface (33) and a voltage regulator inverter module (5). The power supply interface (33) is located on the outside of the housing (11), and the voltage regulator inverter module (5) is located in the inner cavity of the housing (11).

5. A detection device for detecting live defects in composite insulators according to claim 1, characterized in that: The signal amplifier (2) is model INA333.

6. A detection device for detecting live defects in composite insulators according to claim 1, characterized in that: The microprocessor (3) is an ARM Coretex-M3.

7. A detection device for detecting live defects in composite insulators according to claim 1, characterized in that: The data pass-through module (4) is model E22-400T22S.

8. A detection device for detecting live defects in composite insulators according to claim 4, characterized in that: The model of the voltage regulator inverter module (5) is TPS562200.

9. A detection device for detecting live defects in composite insulators according to any one of claims 1-8, characterized in that: It also includes drones used to mount detection devices.

10. A detection device for detecting live defects in composite insulators according to any one of claims 1-8, characterized in that: It also includes an insulated operating rod for mounting the detection device.

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