Wire windage yaw monitoring device for high-voltage transmission line

Abstract

The utility model provides a high voltage power transmission line lead windage yaw monitoring device, comprising an ultrasonic device b installed on a power transmission line through a mounting rack a and an ultrasonic device a installed on a power transmission tower through a mounting rack c, the mounting rack a comprises a mounting disc, and the outer side edge of the mounting disc is provided with a chute a; according to the utility model, the distance between the ultrasonic equipment a and the ultrasonic equipment b can be calculated through the time difference between the signals transmitted and received by the ultrasonic equipment a on the adjacent side, a three-dimensional coordinate axis is established by taking the ultrasonic equipment a on one side as a coordinate origin, and the coordinate point of the ultrasonic equipment b is calculated through the signal transmission between the ultrasonic equipment a and the ultrasonic equipment b. The coordinates of the ultrasonic equipment b in a three-dimensional space under the air temperature of 25 DEG C and the windless condition serve as a base point, the coordinates of the ultrasonic equipment b can be changed along with contraction, expansion and swing of the power transmission line under the conditions of high temperature, low temperature and wind, the changed coordinates serve as a movable point, and the contraction, expansion and windage yaw conditions of the power transmission line are judged by comparing the coordinates of the base point with the coordinates of the movable point.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage transmission line technology, and in particular to a high-voltage transmission line conductor wind deflection monitoring device. Background Technology

[0002] Currently, wind-induced flashover accidents on transmission lines occur frequently, posing a serious threat to the safe operation of the power grid. Once a wind-induced flashover accident occurs, it can lead to power transmission losses and wind-induced tripping. Due to the continuous nature of wind, reclosing after a wind-induced flashover trip is generally not successful, resulting in line outages. As one of the important indicators for line operation and maintenance, wind-induced flashover monitoring is directly related to the safe and stable operation of the lines.

[0003] Therefore, a high-voltage transmission line conductor wind deflection monitoring device is proposed. This device uses two ultrasonic devices (a) installed on adjacent transmission towers. When one ultrasonic device (a) emits an ultrasonic signal, the adjacent ultrasonic device (a) receives the signal. The distance between adjacent ultrasonic devices (a) can be calculated using the time difference between transmission and reception. A three-dimensional coordinate axis is established with one ultrasonic device (a) as the origin. The coordinates of ultrasonic device (b) are calculated through signal transmission between ultrasonic devices (a) and (b). Using the coordinates of ultrasonic device (b) in three-dimensional space at 25°C with no wind as the base point, the coordinates of ultrasonic device (b) change under high temperature, low temperature, and windy conditions due to the contraction, expansion, and swaying of the transmission line. The changed coordinates are used as the moving point. By comparing the coordinates of the base point and the moving point, the contraction, expansion, and swaying of the transmission line can be determined. Utility Model Content

[0004] To achieve the above objectives, this utility model proposes a high-voltage transmission line conductor wind deflection monitoring device, including an ultrasonic device b mounted on the transmission line via a mounting bracket a, and an ultrasonic device a mounted on the transmission tower via a mounting bracket c. The mounting bracket a includes a mounting plate, and a groove a is formed on the outer edge of the mounting plate. A slider a is slidably connected inside the groove a, and a tensioning screw is fixedly connected to the outer side of the slider a. A locking buckle is rotatably connected to the side of the tensioning screw away from the mounting plate, and the locking buckle is used to connect to the transmission line.

[0005] Two ultrasonic devices a are installed on two adjacent transmission towers respectively. When ultrasonic device a on one side emits an ultrasonic signal, the ultrasonic device a on the adjacent side receives the ultrasonic signal. The distance between the adjacent ultrasonic devices a can be calculated by the time difference between transmission and reception. A three-dimensional coordinate axis is established with ultrasonic device a on one side as the origin. The coordinate point of ultrasonic device b is calculated by the signal transmission between ultrasonic device a and ultrasonic device b. The coordinates of ultrasonic device b in three-dimensional space under the condition of 25°C and no wind are used as the base point. Under high temperature, low temperature and wind conditions, the coordinates of ultrasonic device b will change with the contraction, expansion and swaying of the transmission line. The changed coordinates are used as the moving point. By comparing the coordinates of the base point and the moving point, the contraction, expansion and swaying of the transmission line can be determined.

[0006] In one example, the mounting plate has an opening on its outer side, a closing plate is rotatably connected to the outer side of the mounting plate, a mounting frame b is provided inside the mounting plate, the ultrasonic device b is installed inside the mounting plate through the mounting frame b, and solar panels a are installed on both sides of the mounting plate.

[0007] In one example, the mounting frame c further includes a mounting frame d for connecting to the transmission tower. An equipment box is mounted on the top of the mounting frame d. Solar panels b are rotatably connected to both sides of the equipment box. Support frames are rotatably connected to the opposite sides of the two solar panels b. A sliding groove b is provided on one side of the equipment box. A slider b is slidably connected inside the sliding groove b. The ends of the two support frames away from the solar panels b are rotatably connected to the slider b. A bolt is threaded to one side of the slider b. The ultrasonic device a is installed inside the equipment box.

[0008] In one example, multiple ultrasonic devices b are installed in the middle of the power transmission line between two power transmission towers, at the lowest point of the power transmission line's sag, while ultrasonic devices a are installed on the power transmission towers on both sides of each power transmission line segment.

[0009] In one example, the ultrasonic device b includes an ultrasonic transmitting device and an ultrasonic receiving device, and the ultrasonic device a includes an ultrasonic transmitting device, an ultrasonic receiving device, and multiple sets of ultrasonic array sensors.

[0010] In one example, taking the ultrasound device a on one side as the origin, the ultrasound devices a on both adjacent sides are located on the x-axis of the coordinate axis where their origin is located.

[0011] In one example, the coordinates of the ultrasonic device b (3) in three-dimensional space under the condition of 25°C temperature and no wind are taken as the base point. The coordinates of the base point are set as (x, y, z). Early warning monitoring is carried out by setting the threshold for the change of the moving point coordinates. The moving point coordinates are (xn < x1 < x+n, ym < y1 < y+m, zf < z1 < z+f). The values ​​of n, m, and f are set according to the performance of the transmission line.

[0012] In one example, the coordinate axes of the ultrasonic device b (3) are calculated using the principle of triangulation.

[0013] The wind deflection monitoring device for high-voltage transmission line conductors proposed in this utility model has the following beneficial effects:

[0014] 1. In this utility model, since the slider a can be moved into the interior of the slide groove a through the inlet, the number of sliders a can be changed according to the requirements. Since the slider a slides inside the slide groove a, its position on the edge of the mounting plate can be adjusted arbitrarily, so that the mounting plate can be used for various high voltage lines such as two groups, four groups, and six groups.

[0015] 2. In this utility model, the distance between two adjacent ultrasonic devices a can be calculated by the time difference between the transmission and reception of signals. A three-dimensional coordinate axis is established with ultrasonic device a as the origin. The coordinates of ultrasonic device b are calculated by the signal transmission between ultrasonic device a and ultrasonic device b. The coordinates of ultrasonic device b in three-dimensional space under the condition of 25°C and no wind are taken as the base point. Under high temperature, low temperature and wind conditions, the coordinates of ultrasonic device b will change with the contraction, expansion and swing of the power transmission line. The changed coordinates are taken as the moving point. The contraction, expansion and swing of the power transmission line can be judged by comparing the coordinates of the base point and the moving point. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the mounting bracket a of this utility model;

[0017] Figure 2 This is a schematic diagram of the installation disk of this utility model;

[0018] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 for Figure 1 Enlarged view at point B in the middle;

[0020] Figure 5 This is a schematic diagram of the mounting bracket c of this utility model;

[0021] Figure 6 This is a schematic diagram of the equipment box of this utility model;

[0022] Figure 7 This is a schematic diagram of the coordinate preset of this utility model.

[0023] The attached figures are labeled as follows:

[0024] 1. Power transmission line; 2. Mounting bracket a; 201. Mounting plate; 202. Slide a; 203. Inlet; 204. Closing plate; 205. Slider a; 206. Tensioning screw; 207. Lock; 208. Solar panel a; 209. Mounting bracket b; 3. Ultrasonic equipment b; 4. Transmission tower; 5. Mounting bracket c; 501. Mounting bracket d; 502. Equipment box; 503. Solar panel b; 504. Support frame; 505. Slide b; 506. Slider b; 507. Bolt; 6. Ultrasonic equipment a. Detailed Implementation

[0025] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0026] like Figures 1-6 As shown, an embodiment of this utility model proposes a high-voltage transmission line conductor wind deflection monitoring device, which includes an ultrasonic device b3 mounted on the transmission line 1 via a mounting bracket a2, and an ultrasonic device a6 mounted on the transmission tower 4 via a mounting bracket c5.

[0027] The mounting bracket a2 includes a mounting plate 201. A groove a202 is provided on the outer edge of the mounting plate 201. A slider a205 is slidably connected inside the groove a202. An inlet 203 is provided on the outer side of the mounting plate 201. The slider a205 can be easily moved into the groove a202 by a closing plate 204. The closing plate 204 is rotatably connected to the outer side of the mounting plate 201. The closing plate 204 is used to close the inlet 203 to prevent the slider a205 from moving out.

[0028] Since the slider a205 can be moved into the interior of the slide groove a202 through the inlet 203, the number of sliders a205 can be changed according to the requirements. Since the slider a205 slides inside the slide groove a202, its position on the edge of the mounting plate 201 can be adjusted arbitrarily, so that the mounting plate 201 can be used for various high voltage lines such as two groups, four groups, and six groups.

[0029] A tensioning screw 206 is fixedly connected to the outer side of the slider a205. A locking buckle 207 is rotatably connected to the side of the tensioning screw 206 away from the mounting plate 201. The locking buckle 207 is used to connect to the power transmission line 1, such as... Figure 4 The tensioning screw 206 includes a rotating ring and screws threaded to both sides of the rotating ring. By rotating the rotating ring, the screws on both sides can be simultaneously brought together to the middle or extended to both sides. Thus, the tensioning screw 206 can adjust the distance between the mounting plate 201 and the latch 207. This distance adjustment allows the mounting plate 201 to be installed between high-voltage lines with different spacing.

[0030] Solar panels a208 are installed on both sides of the mounting plate 201, and the solar panels a208 serve to supplement the power of the equipment.

[0031] The mounting plate 201 is provided with a mounting bracket b209 inside, and an ultrasonic device b3 is installed inside the mounting plate 201 through the mounting bracket b209. The ultrasonic device b3 includes an ultrasonic transmitting device and an ultrasonic receiving device.

[0032] Specifically, the mounting frame c5 includes a mounting frame d501, and an equipment box 502 is mounted on the top of the mounting frame d501. The equipment box 502 is mounted on the transmission tower 4 via the mounting frame d501. Two ultrasonic devices a6 are installed inside the equipment box 502. The two ultrasonic devices a6 correspond to ultrasonic devices b3 on the transmission lines 1 on both sides of the same transmission tower 4. The ultrasonic devices a6 include an ultrasonic transmitting device, an ultrasonic receiving device, and multiple sets of ultrasonic array sensors.

[0033] Both sides of the equipment box 502 are rotatably connected to solar panels b503, which are used to supplement the power of the equipment.

[0034] Each of the two solar panels b503 is rotatably connected to a support frame 504 on one side. A groove b505 is provided on one side of the equipment box 502. A slider b506 is slidably connected inside the groove b505. The ends of the two support frames 504 away from the solar panels b503 are rotatably connected to the slider b506. A bolt 507 is threadedly connected to one side of the slider b506. The slider b506 is fixed at any position in the middle of the groove b505 by the bolt 507.

[0035] Multiple ultrasonic devices b3 are installed in the middle of the power transmission line 1 between two power transmission towers 4, and their positions are at the lowest point of the drooping power transmission line 1. Ultrasonic devices a6 are installed on both sides of the power transmission tower 4 of each section of power transmission line 1.

[0036] The ultrasonic devices a6 on opposite sides of the adjacent transmission towers 4 establish three-dimensional spatial coordinates between them by emitting ultrasonic signals and considering the distance between them. The ultrasonic device b3 between the two ultrasonic devices a6 receives the ultrasonic signals and then determines its coordinates in three-dimensional space. Taking the position of one ultrasonic device a6 as the origin and the coordinates of ultrasonic device b3 in three-dimensional space under the condition of 25°C and no wind as the base point, the coordinates of ultrasonic device b3 will change as the transmission line 1 contracts, expands, and swings under high temperature, low temperature, and wind conditions. The changed coordinates are taken as the moving point. By comparing the coordinates of the base point and the moving point, the contraction, expansion, and swing of the transmission line 1 can be determined.

[0037] In summary, as Figure 7As shown, assume that two ultrasonic devices a6T1 and T2 are installed on two adjacent transmission towers 4 respectively. Both T1 and T2 include ultrasonic transmitting devices, ultrasonic receiving devices and multiple sets of ultrasonic array sensors. An ultrasonic device b3R is installed at the lowest point of the drooping transmission line 1 between the two transmission towers 4. The R includes ultrasonic transmitting devices and ultrasonic receiving devices.

[0038] When T1 transmits an ultrasonic signal, T2 and R receive the ultrasonic signal. The distance p between T1 and T2 can be calculated by the time difference between transmission and reception. If a three-dimensional rectangular coordinate system is established with the position of T1 as the origin O (0, 0, 0), and T2 is located in the positive X-axis direction of T1, then the position coordinates of T2 (p, 0, 0) can be obtained.

[0039] The formula for calculating the p-value, given the speed of sound in air. (Generally taken as 340 m / s, which can be considered a constant under certain temperature and other conditions), let the time difference between the ultrasonic signal emitted by T1 and the signal received by T2 be . According to the distance formula , can be obtained Thus, the coordinates of T2 are determined to be (p, 0, 0);

[0040] Similarly, the position of R relative to T1 and T2 is determined based on the time and direction of signal propagation when T1 and T2 transmit ultrasonic signals and when R receives ultrasonic signals. The coordinates of R are then determined as follows:

[0041] First, calculate the distances from T1 and T2 to R;

[0042] Let the time from when T1 transmits the ultrasonic signal to when R receives the signal be... ,according to Then the distance from T1 to R Let the time from when T2 transmits the ultrasonic signal to when R receives the signal be . Similarly, the distance from T2 to R can be obtained. ;

[0043] Then, the coordinates of R are determined using the principle of triangulation.

[0044] On the XOY plane, given the coordinates of T1 (0,0), T2 (p,0), and... , According to the principle of the equation of a circle, with T1 as the center, The equation of a circle with radius is With T2 as the center, The equation of a circle with radius is Expanding the second equation: Subtracting the first equation from this equation yields: Therefore, the solution can be found. ;

[0045] Substitute the value of x The solution can be found The sign of y is determined by judging the position of R relative to T1 and T2.

[0046] Considering the Z-axis direction, the angular information of the ultrasonic signals emitted by T1 and T2 in the vertical direction (obtained by the ultrasonic array sensor) can be used. Let the elevation angle of R as seen from T1 be... The elevation angle of R as seen from T2 is Based on trigonometric relationships, and given the values ​​of x and y, , Taking into account all factors, we determine the coordinate z of R in the Z-axis direction by taking appropriate values, and finally obtain the coordinates (x, y, z) of R in three-dimensional space.

[0047] As meteorological conditions change, such as high temperature, low temperature, and wind, transmission line 1 may contract, expand, and oscillate. This causes the coordinates of the ultrasonic device b3R on transmission line 1 to change. Taking the coordinates of ultrasonic device b3 in three-dimensional space under the condition of 25℃ and no wind as the base point R1 (x1, y1, z1), and the changed coordinates as the moving point R2 (x2, y2, z2), by comparing the coordinate changes of R1 and R2, the contraction, expansion, and oscillation of transmission line 1 can be determined.

[0048] In summary, as Figure 7 The changes in the values ​​of each axis of the R coordinate are related to the changes in the state of transmission line 1, but it is not a simple correspondence between a single factor, as detailed below:

[0049] Changes in z-axis value: Changes in the z-axis value of the R coordinate usually indicate a change in the vertical position of R. This may be due to thermal expansion and contraction of the transmission line 1 caused by temperature changes, which in turn causes R to move up and down. However, it may also be due to external forces, such as the vertical component of wind force, which causes vertical displacement of the transmission line 1 and R. In addition, changes in the tension of the transmission line 1 itself may also cause changes in the position of R in the z-axis direction.

[0050] Changes in x-axis and y-axis values: Changes in the x-axis and y-axis values ​​of the R coordinate indicate that R has shifted in the horizontal and vertical directions. In windy weather, wind force is a common cause of lateral and longitudinal shifts in transmission line 1 and R. However, thermal expansion and contraction of transmission line 1 due to temperature changes can also cause displacement in the horizontal (y-axis direction) and vertical (x-axis direction). In addition, installation errors of transmission line 1 and galloping of transmission line 1 (a low-frequency, large-amplitude vibration phenomenon) can also cause changes in the position of R in the x-axis and y-axis directions.

[0051] Monitoring and early warning are performed by setting the coordinate change range of R1 and R2. For example, R1 (xn < x1 < x+n, ym < y1 < y+m, zf < z1 < z+f), where the values ​​of n, m, and f are set according to the performance of transmission line 1.

[0052] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0053] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A high-voltage transmission line conductor wind deflection monitoring device, comprising an ultrasonic device b (3) mounted on a transmission line (1) via a mounting bracket a (2), and an ultrasonic device a (6) mounted on a transmission tower (4) via a mounting bracket c (5), characterized in that, The mounting bracket a (2) includes a mounting plate (201), and a groove a (202) is provided on the outer edge of the mounting plate (201). A slider a (205) is slidably connected inside the groove a (202). A tensioning screw (206) is fixedly connected to the outer side of the slider a (205). A latch (207) is rotatably connected to the side of the tensioning screw (206) away from the mounting plate (201). The latch (207) is used to connect to the power transmission line (1). Two ultrasonic devices a (6) are installed on two adjacent transmission towers (4). When one ultrasonic device a (6) emits an ultrasonic signal, the ultrasonic device a (6) on the adjacent side receives the ultrasonic signal. The distance between the adjacent ultrasonic devices a (6) can be calculated by the time difference between the emission and reception. A three-dimensional coordinate axis is established with the ultrasonic device a (6) on one side as the origin. The coordinate point of the ultrasonic device b (3) is calculated by the signal transmission between the ultrasonic device a (6) and the ultrasonic device b (3).

2. The high-voltage transmission line conductor wind deflection monitoring device according to claim 1, characterized in that, An inlet (203) is provided on the outside of the mounting plate (201). A closing plate (204) is rotatably connected to the outside of the mounting plate (201). A mounting frame b (209) is provided inside the mounting plate (201). The ultrasonic device b (3) is installed inside the mounting plate (201) through the mounting frame b (209). Solar panels a (208) are installed on both sides of the mounting plate (201).

3. The high-voltage transmission line conductor wind deflection monitoring device according to claim 1, characterized in that, The mounting frame c (5) also includes a mounting frame d (501) for connecting the transmission tower (4). An equipment box (502) is mounted on the top of the mounting frame d (501). Solar panels b (503) are rotatably connected to both sides of the equipment box (502). Support frames (504) are rotatably connected to the opposite sides of the two solar panels b (503). A sliding groove b (505) is opened on one side of the equipment box (502). A slider b (506) is slidably connected inside the sliding groove b (505). The ends of the two support frames (504) away from the solar panels b (503) are rotatably connected to the slider b (506). A bolt (507) is threadedly connected to one side of the slider b (506). The ultrasonic device a (6) is installed inside the equipment box (502).

4. The high-voltage transmission line conductor wind deflection monitoring device according to claim 1, characterized in that, Multiple ultrasonic devices b (3) are installed in the middle of the power transmission line (1) between two power transmission towers (4), and their positions are at the lowest point of the power transmission line (1). Ultrasonic devices a (6) are installed on the power transmission towers (4) on both sides of each section of power transmission line (1).

5. The high-voltage transmission line conductor wind deflection monitoring device according to claim 1, characterized in that, The ultrasonic device b (3) includes an ultrasonic transmitting device and an ultrasonic receiving device, and the ultrasonic device a (6) includes an ultrasonic transmitting device, an ultrasonic receiving device, and multiple ultrasonic array sensors.

6. The high-voltage transmission line conductor wind deflection monitoring device according to claim 1, characterized in that, Taking the ultrasound device a(6) on one side as the origin, the ultrasound devices a(6) on both adjacent sides are located on the x-axis of the coordinate axis where the origin is located.

7. The high-voltage transmission line conductor wind deflection monitoring device according to claim 1, characterized in that, Using the coordinates of the ultrasonic device b (3) in three-dimensional space under the condition of 25℃ temperature and no wind as the base point, the coordinates of the base point are set as (x, y, z). Early warning monitoring is carried out by setting the threshold of the change of the moving point coordinates. The moving point coordinates are (xn < x1 < x+n, ym < y1 < y+m, zf < z1 < z+f). The values ​​of n, m, and f are set according to the performance of the transmission line (1).

8. The high-voltage transmission line conductor wind deflection monitoring device according to claim 1, characterized in that, The coordinate axes of the ultrasonic device b (3) are calculated using the principle of triangulation.

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