CN106908701B - Space discharge positioning array and method for determining the position of space discharge source - Google Patents

Abstract

The invention provides a space discharge positioning array. The space discharge positioning array comprises an antenna fixing device, a signal processing device and at least four sensors; the antenna fixing device comprises a first support arm, a second support arm and a third support arm; the first support arm and the second support arm are respectively arranged on two sides of the third support arm and are connected with the third support arm in an obtuse angle, and the first end of the first support arm and the first end of the second support arm are respectively connected with the end part of the third support arm; the first support arm and the second support arm are both connected with sensors, and the third support arm is provided with at least two sensors along the length direction; and the signal processing device is electrically connected with each sensor and is used for determining the position of the space discharge source. The space discharge positioning array provided by the invention can increase the distance between the sensors and the time delay difference of the sensors for receiving electromagnetic wave signals, so that the space discharge positioning array improves the positioning accuracy of the positioning device.

Description

Space discharge positioning array and method for determining the position of space discharge source

technical field

The present invention relates to the technical field of positioning devices, and in particular, to a space discharge positioning array and a method for determining the position of a space discharge source.

Background technique

With the progress of the times, the power grid has penetrated into all aspects of people, so the safe operation of power equipment has always been highly valued by people, and the main threat that affects the safe operation of power equipment is its own insulation performance. The main factor for the insulation performance of electrical equipment.

At present, there are roughly two types of partial discharge monitoring methods at home and abroad, namely contact type and non-contact type. Among them, the contact type is to connect the detection equipment with the equipment to be tested and perform the detection directly. This method often has inconveniences such as time-consuming, heavy workload, and power-off operation. It can be realized by radio frequency signal, acoustic signal or other chemical quantity or physical quantity. Non-contact localization of partial discharge position does not require equipment to be powered off and improves maintenance efficiency. However, there are also problems such as inaccurate positioning and inability to quickly and comprehensively detect.

There are many existing power monitoring equipments, among which the equipments with insulated shells such as GIS (sulfur hexafluoride enclosed combined electrical appliances) or insulators cannot use contact detection, so such equipment can only use the method of non-contact online monitoring. At present, online monitoring devices mainly use helical, rectangular, and dipole antenna arrays, but these arrays have poor positioning accuracy and inaccurate positioning, resulting in the inability to accurately locate the space discharge source.

SUMMARY OF THE INVENTION

In view of this, the present invention proposes a space discharge positioning array and a method for determining the position of a space discharge source, aiming at solving the problem of inaccurate positioning of existing positioning devices.

In one aspect, the present invention provides a space discharge positioning array, the space discharge positioning array includes: an antenna fixing device, a signal processing device and at least four sensors; wherein, the antenna fixing device includes: a first arm, a second A support arm and a third support arm; wherein, the first support arm and the second support arm are respectively placed on both sides of the third support arm and are arranged at an obtuse angle with the third support arm, and, The first end of the first support arm and the first end of the second support arm are respectively connected to the ends of the third support arm; the first support arm and the second support arm are both connected with the sensor, and the third arm is provided with at least two sensors along the length direction, the sensors are used for receiving electromagnetic wave signals radiated by the space discharge source and sending calculation signals to the signal processing device; the A signal processing device is electrically connected to each of the sensors for receiving the calculation signal and determining the position of the space discharge source according to the calculation signal.

Further, in the above-mentioned space discharge positioning array, the third arm includes: a first bending part, a second bending part and a connecting part; wherein, the first arm and the second arm are connected to the The included angles of the third arm are respectively a first preset angle and a second preset angle; the first bending part and the second bending part are respectively placed on both sides of the connecting part and are connected to the The ends of the connecting portion are connected, and the included angles between the first bending portion and the second bending portion and the connecting portion are the first preset angle and the second preset angle, respectively. angle; the first arm is connected to the first bending portion and is arranged in line; the second arm is connected to the second bending portion and arranged in line; the connection portion is along the length Orientation is provided with at least two of said sensors.

Further, in the above-mentioned spatial discharge positioning array, the second end of the first arm is connected to the sensor; the second end of the second arm is connected to the sensor; Both ends are connected to the sensor.

Further, in the above-mentioned space discharge positioning array, the first support arm, the second support arm and the third support arm are all provided with weight reduction holes.

Further, in the above-mentioned spatial discharge positioning array, the first support arm, the second support arm and the third support arm are in the same plane.

Further, in the above-mentioned spatial discharge positioning array, each of the sensors is connected to the antenna fixing device through bolts.

Further, in the above-mentioned spatial discharge positioning array, the antenna fixing device is an aluminum alloy plate.

Further, in the above-mentioned space discharge positioning array, the third arm is provided with a fixing mechanism, and the fixing mechanism is used to support the antenna fixing device.

Further, in the above-mentioned spatial discharge positioning array, the spatial discharge positioning array further includes: an image acquisition device for collecting and displaying images of the discharge area; the signal processing device is electrically connected to the image acquisition device for receiving the the image and identify the location of the spatial discharge source in the image.

The spatial discharge positioning array provided by the present invention arranges multiple sensors along the up-down and left-right directions, so the spatial discharge positioning array can increase the distance between the multiple sensors, thus reducing the electromagnetic wave signals received between the multiple sensors. The error value of the time delay difference, the error of determining the position of the space discharge source according to the time delay difference is also reduced, so the space discharge positioning array improves the positioning accuracy of the positioning device, improves the efficiency of determining the position of the discharge source, and solves the problem in time. The problem of partial discharge of the discharge source reduces the possibility of the insulation degradation of the power equipment caused by the partial discharge of the discharge source, and reduces the possibility of a safety accident of the power equipment.

On the other hand, the present invention also provides a method for determining the position of a space discharge source by a signal processing device in a space discharge positioning array, the method includes the following steps: each of the sensors is marked as the ith sensor, i=1, 2 , ......, n; n is equal to the number of the sensors; determine the spatial dots and the spatial coordinates of each of the sensors as marks (x _i , y _i , z _i ), and set the The coordinates of the space discharge source are (x _s , y _s , z _s ); the time when each of the sensors receives the electromagnetic wave signal is determined according to the calculation signal received by the signal processing device, and is recorded as ti, and the first The time difference between the time when each sensor receives the electromagnetic wave signal and the time when the ith sensor receives the electromagnetic wave signal is t _1i ; according to the spatial geometric analysis,

Ct ₁₂ =d ₁ -d ₂

Ct ₁₃ =d ₁ -d ₃

Ct ₁₄ =d ₁ -d ₄

Ct _1i =d ₁ -d _i (1)

c为电磁波传播速度；任意3个程联立即可确定所述空间放电源的位置。In the formula, d _i is the distance from the space discharge source to the ith sensor, wherein,

c is the propagation speed of electromagnetic waves; any three process links can immediately determine the position of the space discharge source.

The effect of the method for determining the position of the spatial discharge source provided by the signal processing device in the spatial discharge positioning array provided by the present invention is the same as that of the above-mentioned spatial discharge positioning array, so it will not be repeated.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are for the purpose of illustrating preferred embodiments only and are not to be considered limiting of the invention. Also, the same components are denoted by the same reference numerals throughout the drawings. In the attached image:

FIG. 1 is a schematic structural diagram of an antenna fixing device provided by an embodiment of the present invention;

2 is a schematic structural diagram of a third arm in the space discharge positioning array provided by an embodiment of the present invention;

3 is a schematic structural diagram of a first arm in the space discharge positioning array provided by an embodiment of the present invention;

4 is a schematic structural diagram of a second arm in the space discharge positioning array provided by an embodiment of the present invention;

5 is a structural cross-sectional view of a sensor in the spatial discharge positioning array provided by an embodiment of the present invention;

6 is a schematic structural diagram of a fixing device in a space discharge positioning array provided by an embodiment of the present invention;

FIG. 7 is a cross-sectional view taken along line A-A of FIG. 6 .

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be more thoroughly understood, and will fully convey the scope of the present disclosure to those skilled in the art. It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

Example of space discharge positioning array:

Referring to FIG. 1 , the figure shows a preferred structure of an antenna fixing device provided by an embodiment of the present invention. As shown in the figure, the spatial discharge positioning array may include: an antenna fixing device 1 , a signal processing device and at least four sensors 2 . In specific implementation, four sensors 2 can determine the position of the space discharge source. To further improve the positioning accuracy, more sensors 2 can also be provided, so in this embodiment, there are at least four sensors 2 .

The antenna fixing device 1 may include: a first support arm 11 , a second support arm 12 and a third support arm 13 . Wherein, the first support arm 11 and the second support arm 12 may be placed on two sides of the third support arm 13 respectively. Both the first support arm 11 and the second support arm 12 may be arranged at an obtuse angle with the third support arm 13 . The first end of the first support arm 11 (the upper right end shown in FIG. 1 ) and the first end of the second support arm 12 The ends (the lower left end shown in FIG. 1 ) are respectively connected to the ends of the third arm 13 .

In specific implementation, the first support arm 11 can be placed below the third support arm 13 (relative to the position shown in FIG. 1 ) and arranged at an obtuse angle with the third support arm 13 . The first end of the first support arm 11 (the upper right end shown in FIG. 1 ) can be connected with the first end of the third support arm (the left end shown in FIG. 1 ) through bolts; the second support arm 12 can be placed above the third support arm 13 (relative to the third support arm 13 ) 1) and set at an obtuse angle with the third support arm 13, the first end of the second support arm 12 (the lower left end shown in FIG. 1) can be connected with the second end of the third support arm (FIG. shown on the right) can be bolted together. Preferably, in order to increase the stability of the antenna fixing device 1 , the included angles of the first support arm 11 , the second support arm 12 and the third support arm 13 may be the same. Further preferably, in order to increase the strength of the antenna fixing device 1 , the first support arm 11 , the second support arm 12 and the third support arm 13 may be integrally formed.

The first support arm 11 and the second support arm 12 can both be connected with sensors 2, and the third support arm 13 can be provided with at least two sensors 2 along the length direction. The sensors 2 can be used to receive electromagnetic wave signals emitted by the space discharge source and transmit them. The calculated signal is supplied to the signal processing means. In specific implementation, one sensor may be connected to the first support arm 11 and the second support arm 12 , and the third support arm 13 may be provided with two sensors 2 along the length direction (the horizontal direction shown in FIG. 1 ), and other sensors 2 can be arranged at other positions of the first support arm 11 , the second support arm 12 or/and the third support arm 13 . The sensor 2 can receive the electromagnetic wave signal emitted by the space discharge source, record and save the time when the electromagnetic wave signal is received, and transmit a calculation signal to the signal processing device at the same time. The antenna fixing device 1 is connected with the sensors 2 in a certain arrangement. Preferably, in order to further increase the positioning accuracy of the spatial discharge positioning array, the sensors 2 are arranged in a "Z" shape after being fixed.

The signal processing device can be electrically connected to each sensor 2 for receiving the calculation signal and determining the position of the space discharge source according to the calculation signal. In specific implementation, the signal processing device can determine the time when each sensor 2 receives the electromagnetic wave signal according to the calculation signal, and determine the three-dimensional coordinates, that is, the position of the space discharge source, according to the time delay difference settlement. After the position of the sensor 2 is determined, there is a one-to-one correspondence between the position of the spatial discharge source and the time difference of each sensor receiving the electromagnetic wave signal. The following is a detailed description of this one-to-one correspondence. It is known that the three-dimensional coordinates of the ith sensor are ( _xi , _yi , _zi ), and the three-dimensional coordinates of the space discharge source are assumed to be (x _s , y _s , z _s ). The first sensor receives the signal time and The time difference of the signal received by the i-th sensor is t _1i . From the spatial geometry analysis, we can know that:

Ct ₁₂ =d ₁ -d ₂

Ct ₁₃ =d ₁ -d ₃

Ct ₁₄ =d ₁ -d ₄

Ct _1i =d ₁ -d _i (1)

In the formula, d _i is the distance from the space discharge source to the ith sensor, where,

c为电磁波传播速度，c＝3.0×10⁸m/s。任意3个方程联立即可确定空间放电源的位置，多个方程可以有效提高定位的准确度。

c is the propagation speed of electromagnetic wave, c=3.0×10 ⁸ m/s. The position of the space discharge source can be determined immediately by combining any three equations, and multiple equations can effectively improve the positioning accuracy.

The spatial discharge positioning array provided by the present invention can arrange a plurality of sensors along the up-down and left-right directions, so the spatial discharge positioning array can increase the distance between the multiple sensors, thus reducing the electromagnetic waves received between the multiple sensors. The error of the time difference of the signal, the error of determining the position of the space discharge source according to the time difference is also reduced, so the space discharge positioning array improves the positioning accuracy of the positioning device, improves the efficiency of determining the position of the discharge source, and solves the partial discharge of the discharge source in time. It reduces the possibility of the insulation loss caused by the partial discharge of the power equipment by the discharge source, and reduces the possibility of the safety accident of the power equipment.

Referring to FIGS. 1 and 2 , further, the third arm 13 may include a first bending portion 131 , a second bending portion 132 and a connecting portion 133 . Wherein, the included angles between the first support arm 11 and the second support arm 12 and the connecting portion 133 of the third support arm 13 are the first preset angle α and the second preset angle β, respectively, and the first bending portion 131 and the second The bending parts 132 are respectively placed on both sides of the connecting part 133 and are connected to the ends of the connecting part 133 , and the included angles between the first bending part 131 and the second bending part 132 and the connecting part 133 are the first The preset angle α and the second preset angle β. In specific implementation, the first bending part 131 can be placed below the connecting part 133 (relative to the position shown in FIG. 2 ), and the angle between the first bending part 131 and the connecting part 133 and the first arm The angle α between 11 and the third arm 13 is the same, and one end of the first bending part 131 (the upper right end shown in FIG. 2 ) is connected with the first end (the left end shown in FIG. 2 ) of the connecting part 133; The two bending parts 132 can be placed above the connecting part 133 (relative to the position shown in FIG. 2 ), and the angle between the second bending part 131 and the connecting part 133 and the angle between the second arm 11 and the third arm The included angle β of the arms 13 is the same, and one end (the lower left end shown in FIG. 2 ) of the second bending portion 131 is connected to the second end (the right end shown in FIG. 2 ) of the connecting portion 133 .

The first support arm 11 may be connected with the first bending portion 131 and arranged in a line, and the second support arm 12 may be connected with the second bending portion 132 and arranged in a line. In specific implementation, the first end of the first support arm 11 (the upper right end shown in FIG. 1 ) may be connected with the second end of the first bending portion 131 (the lower left end shown in FIG. 1 ), and the second end of the second support arm 12 The first end (the lower left end shown in FIG. 1 ) may be connected with the second end (the upper right end shown in FIG. 1 ) of the second bending portion 132 . Since the included angle between the first bending portion 131 and the connecting portion 133 is the same as the included angle α between the first arm 11 and the third arm 13 , the first bending portion 131 and the first arm 11 are arranged on the same line. The second bending portion 132 and the second arm 12 are also arranged in line.

The connection portion 133 is provided with at least two sensors 2 in the longitudinal direction (horizontal direction shown in FIG. 1 ).

In this embodiment, the third support arm 13 is a bending part, which has a simple structure and is easy to manufacture. In addition, the strength of the bending connection of the bending piece is high, which can increase the strength of the third support arm 13 and increase the service life of the third support arm.

1 and 2, further, the second end of the first support arm 11 (the lower left end shown in FIG. 1) is connected with the sensor 2, and the second end of the second support arm 12 (shown in FIG. 1 ) is connected to the sensor 2. The upper right end of the connector 133 is connected to the sensor 2 , and both ends of the connecting portion 133 are connected to the sensor 2 . In a specific implementation, a sensor 2 is connected to both the first end (the right end shown in FIG. 2 ) and the second end (the left end shown in FIG. 2 ) of the connecting portion 133 of the third arm 13 . Of course, other sensors 2 may be disposed at other positions of the first support arm 11 , the second support arm 12 or/and the third support arm 13 , which are not limited in this embodiment.

In this embodiment, the sensor 2 is arranged on the end of the first arm 11 , the second arm 12 and the connecting portion 133 , which can make full use of the spatial position of the antenna fixing device 1 to further increase the distance between the sensors 2 , thereby further increasing the distance between the sensors 2 . The positioning accuracy of the space discharge positioning array is further increased.

Referring to FIGS. 2 to 4 , in each of the above embodiments, the first support arm 11 , the second support arm 12 and the third antenna support arm 13 are juxtaposed and uniformly provided with a plurality of weight-reducing holes. During specific implementation, the weight-reducing holes may be arranged in parallel and uniformly along the length direction of the first support arm 11 , the second support arm 12 and the third support arm 13 . The weight-reducing hole may be a diamond-shaped hole or a circular hole, and the shape thereof is not limited in this embodiment. In addition, the weight-reducing hole may be a through hole or a blind hole, which is also not limited in this embodiment.

It can be seen that, in this embodiment, the setting of the weight-reducing hole can not only reduce the weight of the antenna fixing device 1 , but also save materials and manufacturing costs.

Further, referring to FIG. 1 , the first support arm 11 , the second support arm 12 and the third support arm 13 may be in the same plane. Preferably, in order to reduce the difficulty of calculation, the sensor 2 can be arranged on the same side of the antenna fixing device 1, that is, the sensor 2 can also be in the same plane.

In this embodiment, when the first support arm 11 , the second support arm 12 and the third support arm 13 are on the same plane, the distance between the sensors 2 can be further increased, thereby increasing the number of sensors 2 receiving electromagnetic wave signals. The time delay is poor, and at the same time, it can prevent the sensor 2 from being blocked or interfered with by other sensors 2, resulting in low positioning accuracy, so the positioning accuracy of the spatial discharge positioning array can be further improved. In addition, when the first support arm 11, the second support arm 12 and the third support arm 13 are on the same plane, it is convenient to process and assemble.

Furthermore, each sensor 2 can be connected with the antenna fixing device 1 by bolts. During specific implementation, in order to increase the stability of the sensors 2, each sensor 2 may be connected to the antenna fixing device 1 through a plurality of bolts. In this embodiment, the structure is simple to assemble, and the bolts are standard parts, so the procurement is simple and the cost is low.

In the above embodiments, the antenna fixing device 1 may be an aluminum alloy plate. In this embodiment, the aluminum alloy plate has good mechanical properties, high strength, light weight, and is easy to carry. Therefore, the mechanical properties of the antenna fixing device 1 are increased, and the mass of the antenna fixing device 1 is reduced, so the antenna fixing device 1 is convenient for transportation. and carry.

Continuing to refer to FIG. 1 , FIG. 6 and FIG. 7 , further, the third support arm 13 may be provided with a fixing mechanism 3 , and the fixing mechanism 3 is used to support the antenna fixing device 1 . In specific implementation, the fixing device 3 can be placed below the central position of the connecting portion 133 of the third arm 13 (relative to the position shown in FIG. 1 ), and each of the fixing devices 3 can be provided with two parallel threads. Through holes, bolts are inserted through the threaded holes to be connected with the connecting portion 133 .

It can be seen that, in this embodiment, the setting of the fixing mechanism 3 can increase the fixing stability of the space discharge positioning array, and can be directly placed at the position to be tested for testing.

The spatial discharge localization array may further include an image acquisition device (not shown in FIG. 1 ) for acquiring and displaying images of the discharge area. The signal processing device can be electrically connected with the image acquisition device, and the signal processing device is used for receiving the image and identifying the position of the spatial discharge source in the image.

Referring to FIG. 2 , in a specific implementation, a circular through hole may be opened at the center of the connecting portion 133 , and a threaded hole may be opened at the top of the circular through hole (relative to the position in FIG. 2 ) of the connecting portion 133 . The device can be penetrated in the circular through hole, and the bolt can be connected with the image acquisition device through the threaded hole and fix the image acquisition device. The image capture device can capture images in one direction of the discharge area. At this time, the image capture device can be rotated to capture images in different directions by tightening the bolts. Of course, the image capture device can also capture images in all directions of the discharge area and display the discharge. image of the area. The signal processing device may identify the location of the spatial discharge source determined by the signal processing device with an asterisk or other conspicuous form on the displayed image.

It can be seen that in this embodiment, the image acquisition device can display the device in the discharge area in the form of an image, and can display the position of the discharge source determined by the signal processing device in the form of a visible image, so the inspector can directly determine the discharge source through the image. The space area, the space discharge equipment, and the specific part of the space discharge equipment discharge. Therefore, the space discharge positioning array can present the position of the space discharge source in the form of an image, which makes the space discharge source clear at a glance, and reduces the time for estimating the space discharge equipment and placing the specific position through coordinates.

The space discharge positioning array provided in this embodiment will be described in more detail below.

As shown in FIG. 1 to FIG. 7 , the spatial discharge positioning array includes an antenna fixing device 1 , four sensors 2 , a signal processing device and an image acquisition device. The antenna fixing device 1 is an aluminum alloy plate, and a plurality of diamond-shaped weight-reducing through holes are uniformly arranged in parallel on the antenna fixing device 1 . The antenna fixing device 1 includes a first support arm 11 , a second support arm 12 and a third support arm 13 placed on the same plane. The third arm 13 includes a first bending portion 131, a second bending portion 132 and a connecting portion 133, the lengths of which are 152 mm, 152 mm and 1004 mm respectively. The structure is the same, the second end of the first bending part 131 (the lower left end shown in FIG. 2 ) and the second end of the second bending part 132 (the upper right end shown in FIG. 2 ) are juxtaposed with two circles. Through hole, a circular through hole is provided at the center of the connecting portion 132 for installing the image capture device. The connecting portion 133 is arranged horizontally (relative to the position in FIG. 2 ), the first bent portion 131 is placed below the connecting portion 133 (relative to the position in FIG. 2 ), and the first bent portion 131 is connected to the The part 133 is arranged at 145°, and the third arm 13 is arranged in a Z shape as a whole. The first end of the first bending part 131 (the upper right end shown in FIG. 2 ) is connected with the first end of the connecting part 133 (the left end shown in FIG. 2 ), and the first end of the second bending part 132 (shown in FIG. 2 ) is connected. The lower left end is shown) is connected with the second end (the right end shown in FIG. 2 ) of the connecting portion 133 , and the first bending portion 131 , the second bending portion 132 and the connecting portion 133 are integrally formed. The first support arm 11 and the second support arm 12 are both aluminum alloy straight plates with a length of 700 mm and have the same structure. Both ends of the first support arm 11 and the second support arm 12 are provided with two parallel threaded holes, which are respectively connected with The third arm 13 is connected with the sensor 2, and the sensors 2 are all placed on the same plane. A circular through hole is provided between the second end of the first support arm 11 (the right end shown in FIG. 3 ) and the two threaded holes of the second end of the second support arm 12 (the right end shown in FIG. 4 ) . The first support arm 11 and the second support arm 12 are respectively disposed on the first bending portion 131 and the second bending portion 132 in a collinear manner, and the first end of the first support arm 11 (the upper right end shown in FIG. 1 ) The second end of the first bending part 131 (the lower left end shown in FIG. 1 ) is connected by bolts, and the first end of the second arm 12 (the lower left end shown in FIG. 1 ) is connected to the second bending part 132 The second end of the antenna (the upper right end shown in FIG. 1 ) is connected by bolts, so the antenna fixing device 1 is centrally symmetric with respect to the circular through hole at the center of the connecting portion 133 . Sensor 2 is a sensor with a frusto-conical shell. The PCB board of the sensor is connected to the top of the shell by bolts (relative to the position shown in Figure 5), and two threaded holes and a circular through hole are opened at the bottom for fixing and routing. The second end of the first support arm 11 (the lower left end shown in FIG. 1 ) and the second end of the second support arm 12 (the upper right end shown in FIG. 1 ) are respectively connected with the first sensor 201 and the second sensor 202 through bolts. The two ends of the connecting portion 133 are also connected to the third sensor 203 and the fourth sensor 204 respectively through bolts. Moreover, the connection between the antenna fixing device 1 and the sensor 2 is located below the circular through hole of the sensor 2. A circular through hole is provided. The hole is used for the wiring of the sensor 2, wherein the horizontal and vertical distances between the first sensor 201 and the third sensor 203 are both 700 mm, and the horizontal and vertical distances between the second sensor 202 and the fourth sensor 204 are both 700 mm, The third sensor 203 and the fourth sensor 204 are arranged horizontally, and the horizontal distance is 700 mm. In addition, the fixing mechanism 3 is provided with two threaded holes in parallel along the horizontal direction (relative to the position shown in FIG. 6 ), and the bottom of the circular through hole at the central position of the connecting portion 133 (relative to the position shown in FIG. 1 ) is also Two threaded holes are arranged side by side in the horizontal direction, and the fixing mechanism 3 is placed below the connecting portion 133 (relative to the position shown in FIG. 1 ) and connected to the bottom of the connecting portion 133 by bolts. The top of the circular through hole at the center of the connection part 133 (relative to the position shown in FIG. 1 ) is also provided with a threaded hole, and the image acquisition device is fixed to the circular through hole at the center of the connection part 133 by bolts passing through the threaded hole. at the through hole. The center of the circular through hole at the center of the connecting portion 133 is the origin, that is, the coordinates are (0, 0, 0), then the three-dimensional coordinates of the first sensor 201 , the second sensor 202 , the third sensor 203 and the fourth sensor 204 are respectively are (-105, -70, 0), (-105, 70, 0), (-35, 0, 0) and (35, 0, 0). The signal processing device determines the three-dimensional coordinates, that is, the position of the space discharge source according to the time delay difference settlement, and displays the position in the form of an asterisk at the corresponding position of the image acquisition and display image.

To sum up, the spatial discharge positioning array provided by the present invention arranges a plurality of sensors along the up, down, left and right directions, so it is beneficial for the spatial discharge positioning array to receive electromagnetic wave signals in different directions, which can increase the distance between multiple sensors, thus reducing The time difference error value of the electromagnetic wave signals received between multiple sensors is reduced, and the error of determining the position of the space discharge source according to the time difference is also reduced. Therefore, the space discharge positioning array improves the positioning accuracy of the positioning device and improves the determination of the discharge source. The efficiency of the location further solves the problem of partial discharge of the discharge source in time, reduces the possibility of the insulation reduction caused by the partial discharge of the discharge source of the power equipment, and reduces the possibility of safety accidents of the power equipment.

Embodiments of the method for determining the position of the space discharge source by the signal processing device in the above-mentioned space discharge positioning array:

The signal processing device in the above-mentioned space discharge positioning array can receive the time when the sensor receives the electromagnetic wave signal, and determine the three-dimensional coordinates, that is, the position of the space discharge source, according to the time delay difference settlement.

Each sensor 2 is marked as the ith sensor, i=1, 2, . . . , n; n is equal to the number of the sensors 2 . Specifically, each sensor 2 is marked one by one, and the ith sensor is marked respectively, where i=1, 2, . . . , n, and n is equal to the number of sensors 2 in the positioning array.

Determine the space point and the space coordinates of each of the sensors (2) as marks (x _i , _yi , z _i ), and set the coordinates of the space discharge source as (x _s , y _s , z _s ) . Specifically, a point in space is set as a circular point and its coordinates are (0, 0, 0), then the three-dimensional coordinates of the i-th sensor are known to be ( _xi , y _i , z _i ), and it is assumed that the The three-dimensional coordinates are (x _s , y _s , z _s ).

According to the calculation signal received by the signal processing device, the time when each sensor 2 receives the electromagnetic wave signal is determined and recorded as t _i , and the time difference between the time when the first sensor receives the electromagnetic wave signal and the time when the ith sensor receives the electromagnetic wave signal is set as t _1i .

According to the spatial geometry analysis, it can be known that:

Ct ₁₂ =d ₁ -d ₂

Ct ₁₃ =d ₁ -d ₃

Ct ₁₄ =d ₁ -d ₄

Ct _1i =d ₁ -d _i (1)

In the formula, d _i is the distance from the space discharge source to the ith sensor, where,

c为电磁波传播速度，本领域技术人员所熟知的是c＝3.0×10⁸m/s。任意3个方程联立即可确定空间放电源的位置，多个方程可以有效提高定位的准确度。

c is the propagation speed of electromagnetic waves, which is well known to those skilled in the art as c=3.0×10 ⁸ m/s. The position of the space discharge source can be determined immediately by combining any three equations, and multiple equations can effectively improve the positioning accuracy.

The effect of the method for determining the position of the spatial discharge source provided by the signal processing device in the spatial discharge positioning array provided in this embodiment is the same as that of the above-mentioned spatial discharge positioning array, and thus will not be described in detail.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (10)

1. A spatial discharge localization array, comprising: the device comprises an antenna fixing device (1), a signal processing device and at least four sensors (2); wherein,

the antenna fixture (1) comprises: a first arm (11), a second arm (12) and a third arm (13); the first support arm (11) and the second support arm (12) are respectively arranged at two sides of the third support arm (13) and are arranged at an obtuse angle with the third support arm (13), and the first end of the first support arm (11) and the first end of the second support arm (12) are respectively connected to the end part of the third support arm (13);

the first support arm (11) and the second support arm (12) are both connected with the sensors (2), the third support arm (13) is provided with at least two sensors (2) along the length direction, and the sensors (2) are used for receiving electromagnetic wave signals radiated by a space discharge source and sending calculation signals to the signal processing device;

the signal processing device is electrically connected with each sensor (2) and used for receiving the calculation signals and determining the position of the space discharge source according to the calculation signals.

2. The space discharge positioning array according to claim 1, wherein the third arm (13) comprises: a first bent portion (131), a second bent portion (132), and a connecting portion (133); wherein,

the included angles of the connecting parts (133) of the first support arm (11), the second support arm (12) and the third support arm (13) are respectively a first preset angle and a second preset angle;

the first bending part (131) and the second bending part (132) are respectively arranged at two sides of the connecting part (133) and connected with the end part of the connecting part (133), and included angles between the first bending part (131) and the connecting part (133) and included angles between the second bending part (132) and the connecting part (133) are respectively a first preset angle and a second preset angle;

the first support arm (11) is connected with the first bent part (131) and arranged in a collinear manner, and the second support arm (12) is connected with the second bent part (132) and arranged in a collinear manner;

the connecting part (133) is provided with at least two sensors (2) along the length direction.

3. The spatial discharge positioning array of claim 2,

the second end of the first support arm (11) is connected with the sensor (2);

the second end of the second support arm (12) is connected with the sensor (2);

both ends of the connecting part (133) are connected with the sensor (2).

4. The space discharge positioning array according to claim 3, characterized in that the first arm (11), the second arm (12) and the third arm (13) are provided with lightening holes.

5. The space discharge positioning array according to claim 4, characterized in that the first arm (11), the second arm (12) and the third arm (13) are in the same plane.

6. The space discharge positioning array according to claim 5, wherein each sensor (2) is connected to the antenna fixture (1) by a bolt.

7. The spatial discharge positioning array according to any of claims 1 to 6, wherein the antenna fixture (1) is an aluminum alloy plate.

8. The spatial discharge positioning array of claim 7,

the third support arm (13) is provided with a fixing mechanism (3), and the fixing mechanism (3) is used for supporting the antenna fixing device (1).

9. The space discharge positioning array of claim 8, further comprising:

the image acquisition device is used for acquiring and displaying an image of the discharge area;

the signal processing device is electrically connected with the image acquisition device and is used for receiving the image and identifying the position of the space discharge source in the image.

10. A method for determining the location of a spatial discharge source using the signal processing means in a spatial discharge localization array as claimed in any one of claims 1 to 9, comprising the steps of:

each of the sensors (2) is labeled as the i-th sensor (2), i 1, 2, ·., n; n is equal to the number of said sensors (2);

determining the spatial dots and the spatial coordinates of each of said sensors (2) as a marker (x)_i，y_i，z_i) And, setting the coordinates of the space discharge source to (x)_s，y_s，z_s)；

According to the calculation signals received by the signal processing device, the time of receiving the electromagnetic wave signals by each sensor (2) is determined and recorded as t_iAnd, the 1 st sensor is set to receiveThe time difference between the time of the electromagnetic wave signal and the time when the ith sensor receives the electromagnetic wave signal is t_1i；

According to the analysis of the space geometry,

Ct₁₂＝d₁-d₂

Ct₁₃＝d₁-d₃

Ct₁₄＝d₁-d₄

Ct_1i＝d₁-d_i(1)

in the formula (d)_iThe distance from the space discharge source to the ith sensor, wherein,

c is the electromagnetic wave propagation speed; the position of the space discharge source can be determined by combining any 3 equations.

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