Insulator voltage distribution detection aircraft and detection method

Abstract

The invention discloses an insulator voltage distribution detection aircraft and a detection method. The insulator voltage distribution detection aircraft comprises an aircraft main body, a voltage acquisition probe, a voltage detection module and an extension bar, the voltage acquisition probe and the voltage detection module are both mounted on the aircraft body, the tail end of the voltage acquisition probe is connected to the voltage detection module, and the voltage acquisition probe is connected with the aircraft body through an extension bar; the voltage acquisition probe is of a self-adaptive double-probe structure. The voltage acquisition probe is arc-shaped, and two sides of the voltage acquisition probe are of ellipsoidal structures, so that the curvature radius of the voltage acquisition probe structure is increased, and the possibility of corona discharge is reduced; the voltage acquisition probe is of a double-layer structure, a spring is arranged between an inner layer and an outer layer to provide a buffering effect, and good contact between the voltage acquisition probe and the insulator is guaranteed. The inner layer structure of the voltage acquisition probe is provided with a plurality of separated structures, the shape of the probe can be changed in cooperation with an interlayer spring, and good contact can be ensured for insulators of different sizes.

Description

Technical Field

[0001] The invention belongs to the field of insulator voltage distribution detection, and relates to an insulator voltage distribution detection aircraft and a detection method. Background Art

[0002] In the power system, insulators are key components to ensure the safety and stability of high-voltage power transmission. The voltage distribution detection of insulators is crucial to evaluate their insulation status, predict insulator failures, and maintain the reliability of the power system.

[0003] The traditional insulator voltage detection method usually uses a metal probe to directly contact the insulator steel cap. When the metal probe contacts the insulator steel cap, it is easy to "bounce", resulting in intermittent contact between the probe and the steel cap. This multiple contact and separation not only affects the accuracy of the measurement, but also generates strong electromagnetic interference, which in turn affects the normal operation of other equipment and systems. At the same time, due to the different shapes and sizes of insulators, traditional metal probes usually cannot ensure a good fit with the steel caps of insulators of different specifications. Probes of fixed sizes face the problem of being unable to effectively contact in actual applications, which directly leads to the unreliability of the detection results. In addition, the current detection methods often rely on the operator's naked eye observation to judge the contact between the probe and the insulator steel cap. Due to the limitations of the operator's experience and vision, manual judgment has a large uncertainty and is prone to misjudgment. Summary of the invention

[0004] The purpose of the present invention is to provide an insulator voltage distribution detection aircraft and detection method, which solves the technical problems that direct contact of metal probes will cause strong electromagnetic interference; the insulator steel caps are of different sizes, and the fixed probe cannot ensure good fit with the insulator steel cap; and the operator cannot ensure whether the contact between the probe and the insulator steel cap is good by naked eye observation alone.

[0005] To achieve the above object, the present invention adopts the following technical solutions: An insulator voltage distribution detection aircraft comprises an aircraft body, a voltage collection probe, a voltage detection module and an extension rod; the voltage collection probe and the voltage detection module are both installed on the aircraft body, the end of the voltage collection probe is connected to the voltage detection module, and the voltage collection probe is connected to the aircraft body through the extension rod; the voltage collection probe is an adaptive dual-probe structure.

[0006] Furthermore, the voltage collection probe includes a negative voltage collection probe and a positive voltage collection probe, the negative voltage collection probe and the positive voltage collection probe have the same structure and are connected side by side on the extension rod.

[0007] Furthermore, the negative voltage acquisition probe and the positive voltage acquisition probe both include an outer metal sheet, an inner metal sheet and an adaptive buffer mechanism, the outer metal sheet is arc-shaped, and a plurality of inner metal sheets are connected to the inner side of the arc of the outer metal sheet through the adaptive buffer mechanism.

[0008] Furthermore, the adaptive buffer mechanism is a spring, and four springs are arranged between each inner metal sheet and the outer metal sheet, and the four springs are distributed in a rectangular shape.

[0009] Furthermore, the center distance between the negative voltage collection probe and the positive voltage collection probe is 127-195 mm; the distance between the bottom of the negative voltage collection probe and the top of the positive voltage collection probe is greater than the height of the insulating member.

[0010] Furthermore, the outer metal sheet is an arc-shaped structure with a diameter ranging from 110 to 130 mm, and the plurality of inner metal sheets are distributed in an arc shape with a diameter of 65 to 75 mm as a whole.

[0011] Furthermore, a pressure sensor is provided on the outer metal sheet to collect the pressure transmitted from the inner metal sheet at the middle position to the outer metal sheet through four springs.

[0012] Furthermore, the extension length of the extension rod is greater than the length of the insulator extending beyond the steel cap.

[0013] Furthermore, a power module is also provided on the aircraft body.

[0014] A method for detecting an insulator voltage distribution of an aircraft comprises the following steps: S1, start the aircraft power module, control the aircraft to fly and approach the first insulator on the cross arm side of the insulator string to be tested; S2. Adjust the attitude of the aircraft so that the voltage acquisition probe faces the insulator string to be tested, and the negative voltage acquisition probe and the positive voltage acquisition probe are parallel to the steel caps of the first insulator and the second insulator respectively; S3, control the aircraft to fly towards the insulator to be tested, so that the negative voltage acquisition probe and the positive voltage acquisition probe are in contact with the steel caps of the first insulator and the second insulator respectively, and observe the contact pressure value transmitted in real time on the operating platform. When the detected pressure is less than the set value, the operator controls the aircraft to move towards the insulator to be tested; when the detected pressure is greater than the set value, the operator controls the aircraft to move away from the insulator to be tested, and continues to adjust until the detected pressure stabilizes to the set value; S4, start the voltage detection module and record the measured voltage data; S5, control the aircraft to fly away from the insulator to be tested until the aircraft has enough space to move up and down along the insulator, continue to control the aircraft to fly downward, and continue to detect the voltage of the second insulator according to steps S2, S3, and S4; S6, repeating steps S2, S3, S4, and S5 until all insulators in the insulator string to be tested are tested, and controlling the aircraft to return to the ground; S7. Analyze all measured voltage data according to the standard value of the insulator string distribution voltage. If the voltage distribution value of the insulator under test is lower than the standard value by 50%, or is significantly lower than the voltage distribution measurement value on the adjacent insulators on both sides, it is judged as a deteriorated insulator.

[0015] Compared with the prior art, the present invention has the following technical effects: 1) The voltage acquisition probe is arc-shaped, with ellipsoidal structures on both sides, which increases the curvature radius of the voltage acquisition probe structure and reduces the possibility of corona discharge; 2) The voltage acquisition probe is set up with a double-layer structure, and a spring is set between the inner layer and the outer layer to provide a buffer effect to ensure good contact between the voltage acquisition probe and the insulator; 3) The inner structure of the voltage acquisition probe is set up with a 3-piece separated structure, and the interlayer spring is used to realize the variable shape of the probe, which can ensure good contact with insulators of different sizes; 4) A pressure sensor is installed at the bottom of the spring of the voltage acquisition probe to monitor the contact pressure between the probe and the insulator steel cap in real time, thereby controlling the forward or backward movement of the aircraft, ensuring good contact and avoiding excessive squeezing force; 5) The power module is designed to be located in the opposite direction of the voltage acquisition probe to ensure the overall balance of the aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a global schematic diagram of the insulator voltage distribution detection aircraft; Figure 2 It is a detailed schematic diagram of the bottom of the aircraft for detecting the voltage distribution of the insulator; Figure 3 This is a detailed picture of the voltage acquisition probe; Figure 4 This is a top view of the voltage acquisition probe.

[0017] Reference numerals: Power module-1; voltage acquisition probe-2; voltage detection module-3; negative voltage acquisition probe-4; positive voltage acquisition probe-5; inner metal sheet-6; outer metal sheet-7; extension rod-8. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings: Example 1, please refer to Figure 1-Figure 4 The present invention provides an insulator voltage distribution detection aircraft, including an aircraft body, a voltage collection probe 2, a voltage detection module 3 and an extension rod 8; the voltage collection probe 2 and the voltage detection module 3 are both installed on the aircraft body, the end of the voltage collection probe 2 is connected to the voltage detection module 3, and the voltage collection probe 2 is connected to the aircraft body through the extension rod 8; the voltage collection probe 2 is an adaptive dual-probe structure.

[0019] The voltage acquisition probe adopts an arc-shaped appearance, and its two sides are ellipsoidal structures. This design effectively reduces the accumulation of space charge by increasing the curvature radius of the voltage acquisition probe structure, thereby greatly reducing the possibility of corona discharge. Such a design not only improves the safety performance of the equipment, but also extends its service life and ensures the accuracy and stability of voltage data acquisition.

[0020] In order to further improve the reliability and accuracy of voltage acquisition, the probe is set up with a double-layer structure. A spring is installed between the inner and outer layers to provide a buffering effect, so that the voltage acquisition probe can be more gentle and tight when in contact with the insulator. Even under complex working conditions, it can ensure that the probe and the insulator maintain a good contact state, providing a strong guarantee for the accurate transmission of voltage data.

[0021] Considering that insulators may have different sizes and shapes, the inner layer structure of the voltage acquisition probe has an innovative split design. Specifically, the inner layer is divided into three independent split structures, and interlayer springs are also provided between these structures. This design enables the probe to be flexibly adjusted according to the actual size and shape of the insulator, achieving the variability of the probe shape. Regardless of how the size of the insulator changes, this design ensures that the voltage acquisition probe maintains good contact with it, thereby greatly improving the accuracy and adaptability of data acquisition.

[0022] Embodiment 2, the present invention provides an insulator voltage distribution detection aircraft, comprising: Each voltage acquisition probe 2 is provided with a double-layer sheet structure, the outer metal sheet 7 is an arc-shaped structure with a diameter ranging from 110 to 130 mm, the inner metal sheet 6 is provided with a three-piece separate structure, and the three inner metal sheets 6 are distributed in an arc shape with a diameter of 65 to 75 mm as a whole. Springs are arranged between the inner metal sheet and the outer metal sheet to provide a buffering effect, and four springs are arranged between each inner metal sheet and the outer metal sheet, and the four springs are distributed in a rectangular shape.

[0023] When the diameter of the steel cap of the insulator to be tested is large, the two inner metal sheets located at the two sides of the three inner metal sheets first contact the steel cap of the insulator to be tested, and the four outer springs are squeezed first. As the contact becomes closer, the four inner springs of the two inner metal sheets located at the two sides are also squeezed, and the squeezing force is smaller than that of the four outer springs. At the same time, the four springs connected to the inner metal sheet located in the middle position also begin to be squeezed, so that the radius of the arc-shaped structure presented by the three inner metal sheets becomes larger and fits the steel cap of the insulator to be tested.

[0024] When the diameter of the steel cap of the insulator to be tested is small, the inner metal sheet located in the middle of the three inner metal sheets contacts the steel cap of the insulator to be tested first. As the contact becomes closer, the four springs connected to the inner metal sheet located in the middle are squeezed, and the four inner springs of the other two inner metal sheets are squeezed, and the squeezing force is greater than that of the four outer springs, so that the radius of the arc-shaped structure presented by the three inner metal sheets becomes smaller and fits the steel cap of the insulator to be tested.

[0025] The pressure sensor is located on the outer metal sheet. It monitors in real time the pressure transmitted from the inner metal sheet in the middle to the outer metal sheet through four springs, and wirelessly transmits the pressure value to the ground operator's control platform. The pressure setting value can be set to 5~15N. When the detected pressure is less than the set value, the aircraft is controlled to move closer to the insulator; when the detected pressure is greater than the set value, the aircraft is controlled to move away from the insulator.

[0026] The end of the voltage acquisition probe 2 is connected to the voltage detection module 3. After dividing, filtering and sampling the detected input voltage, the real-time insulator distribution voltage is measured and transmitted to the ground data receiver through the wireless transmission module.

[0027] The power module 1 is designed to be located in the opposite direction of the voltage acquisition probe, thereby eliminating the tilt or yaw problem of the aircraft that may be caused by the imbalance of the center of gravity caused by the extension of the voltage acquisition probe, and maintaining the overall balance of the aircraft.

[0028] The extended length of the voltage collection probe must be greater than the length of the insulator extending beyond the steel cap, that is, half of the difference between the maximum nominal diameter of the insulating component and the diameter of the steel cap, so the extended length of the voltage collection probe should be greater than 125mm; the center distance between the negative voltage collection probe 4 and the positive voltage collection probe 5 is approximately the nominal structural height range, that is, 127~195mm; the distance between the bottom of the negative voltage collection probe and the top of the positive voltage collection probe should be greater than the height of the insulating component, so it should be greater than 55mm.

[0029] Embodiment 3, detailed steps of detecting the voltage distribution of insulators according to the present invention: S1. Start the aircraft power module, and the operator controls the aircraft to fly and gradually approach the first insulator on the cross arm side of the insulator string to be tested; S2. Adjust the attitude of the aircraft so that the voltage acquisition probe faces the insulator string to be tested, and the negative voltage acquisition probe and the positive voltage acquisition probe are parallel to the steel caps of the first insulator and the second insulator respectively; S3. The operator controls the aircraft to fly slowly toward the insulator to be tested, so that the negative voltage acquisition probe and the positive voltage acquisition probe contact the steel caps of the first insulator and the second insulator respectively, and observes the contact pressure value transmitted in real time on the operating platform. When the detected pressure is less than the set value, the operator controls the aircraft to move toward the insulator to be tested; when the detected pressure is greater than the set value, the operator controls the aircraft to move away from the insulator to be tested, and continues to adjust until the detected pressure stabilizes to the set value; S4, starting the voltage detection module, and the measured voltage data will be wirelessly transmitted to the control platform of the ground operator and recorded; S5, the operator controls the aircraft to fly slowly away from the insulator to be tested until the aircraft has enough space to move up and down along the insulator, and continues to control the aircraft to fly downward, and continues to detect the voltage of the second insulator according to steps S2, S3, and S4; S6, repeating steps S2, S3, S4, and S5 until all insulators in the insulator string to be tested are tested, and the operator controls the aircraft to return to the ground; S7. Analyze all measured voltage data according to the standard value of insulator string distribution voltage specified in DL / T 626-2015 "Deteriorated Suspension Insulator Inspection Procedure". If the voltage distribution value of the insulator under test is 50% lower than the standard value, or is significantly lower than the voltage distribution measurement value on the adjacent insulators on both sides, it is judged to be a deteriorated insulator.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. An insulator voltage distribution detection aircraft, characterized in that: The invention comprises an aircraft body, a voltage collection probe (2), a voltage detection module (3) and an extension rod (8); the voltage collection probe (2) and the voltage detection module (3) are both mounted on the aircraft body, the end of the voltage collection probe (2) is connected to the voltage detection module (3), and the voltage collection probe (2) is connected to the aircraft body via the extension rod (8); the voltage collection probe (2) is an adaptive dual-probe structure.

2. The insulator voltage distribution detection aircraft according to claim 1, characterized in that: The voltage collection probe (2) comprises a negative voltage collection probe (4) and a positive voltage collection probe (5); the negative voltage collection probe (4) and the positive voltage collection probe (5) have the same structure and are connected side by side on the extension rod (8).

3. The insulator voltage distribution detection aircraft according to claim 2, characterized in that: The negative voltage collection probe (4) and the positive voltage collection probe (5) both comprise an outer metal sheet (7), an inner metal sheet (6) and an adaptive buffer mechanism; the outer metal sheet (7) is in an arc shape, and a plurality of inner metal sheets (6) are connected to the inner side of the arc of the outer metal sheet (7) via the adaptive buffer mechanism.

4. The insulator voltage distribution detection aircraft according to claim 3, characterized in that: The adaptive buffer mechanism is a spring, and four springs are arranged between each inner metal sheet (6) and the outer metal sheet (7), and the four springs are distributed in a rectangular shape.

5. The insulator voltage distribution detection aircraft according to claim 2, characterized in that: The center distance between the negative voltage collection probe (4) and the positive voltage collection probe (5) is 127-195 mm; the distance between the bottom of the negative voltage collection probe (4) and the top of the positive voltage collection probe (5) is greater than the height of the insulating member.

6. The insulator voltage distribution detection aircraft according to claim 4, characterized in that: The outer metal sheet (7) is an arc-shaped structure with a diameter ranging from 110 to 130 mm, and the plurality of inner metal sheets (6) are distributed in an arc shape with a diameter ranging from 65 to 75 mm.

7. The insulator voltage distribution detection aircraft according to claim 4, characterized in that: The outer metal sheet (7) is provided with a pressure sensor for collecting the pressure transmitted from the inner metal sheet at the middle position to the outer metal sheet via four springs.

8. The insulator voltage distribution detection aircraft according to claim 1, characterized in that: The extension length of the extension rod (8) is greater than the length of the insulator extending beyond the steel cap.

9. The insulator voltage distribution detection aircraft according to claim 1, characterized in that: A power module (1) is also provided on the aircraft body.

10. A method for detecting an insulator voltage distribution detection aircraft according to any one of claims 1 to 9, comprising the following steps: S1, start the aircraft power module, control the aircraft to fly and approach the first insulator on the cross arm side of the insulator string to be tested; S2. Adjust the attitude of the aircraft so that the voltage acquisition probe faces the insulator string to be tested, and the negative voltage acquisition probe and the positive voltage acquisition probe are parallel to the steel caps of the first insulator and the second insulator respectively; S3, control the aircraft to fly towards the insulator to be tested, so that the negative voltage acquisition probe and the positive voltage acquisition probe are in contact with the steel caps of the first insulator and the second insulator respectively, and observe the contact pressure value transmitted in real time on the operating platform. When the detected pressure is less than the set value, the operator controls the aircraft to move towards the insulator to be tested; when the detected pressure is greater than the set value, the operator controls the aircraft to move away from the insulator to be tested, and continues to adjust until the detected pressure stabilizes to the set value; S4, start the voltage detection module and record the measured voltage data; S5, control the aircraft to fly away from the insulator to be tested until the aircraft has enough space to move up and down along the insulator, continue to control the aircraft to fly downward, and continue to detect the voltage of the second insulator according to steps S2, S3, and S4; S6, repeating steps S2, S3, S4, and S5 until all insulators in the insulator string to be tested are tested, and controlling the aircraft to return to the ground; S7. Analyze all measured voltage data according to the standard value of the insulator string distribution voltage. If the voltage distribution value of the insulator under test is lower than the standard value by 50%, or is significantly lower than the voltage distribution measurement value on the adjacent insulators on both sides, it is judged as a deteriorated insulator.

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