CN106908701B - Space discharge positioning array and method for determining space discharge source position - Google Patents
Space discharge positioning array and method for determining space discharge source position Download PDFInfo
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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
Technical Field
The invention relates to the technical field of positioning devices, in particular to a space discharge positioning array and a method for determining the position of a space discharge source by the space discharge positioning array.
Background
With the progress of the times, the power grid has deepened into all aspects of people, so that the safe operation of the power equipment is always highly emphasized by people, and the main threat influencing the safe operation of the power equipment is the insulation performance of the power equipment, wherein the partial discharge of the power equipment is a main factor influencing the insulation performance of the power equipment.
At present, local discharge monitoring modes at home and abroad are two, namely contact and non-contact. The contact type method is used for connecting the detection equipment with the detected equipment and directly detecting, and the method usually has the inconvenience of long time consumption, large workload, power-off operation and the like; in addition, generally, non-contact is realized through monitoring partial discharge signals, radio frequency signals, sound signals or other chemical quantities or physical quantities, and the non-contact positions the partial discharge positions without powering off equipment, so that the maintenance efficiency is improved, but the problems of inaccurate positioning, incapability of rapid and comprehensive detection and the like exist.
The existing electric power monitoring equipment is numerous, wherein equipment with an insulated shell, such as GIS (sulfur hexafluoride closed type combined electrical appliance) or insulators and the like, cannot adopt contact detection, so that the equipment can only adopt a non-contact online monitoring method. At present, the on-line monitoring device mainly adopts antenna arrays such as a spiral antenna array, a rectangular antenna array and a dipole antenna array, but the positioning precision of the antenna arrays is poor, the positioning is inaccurate, and the space discharge source cannot be accurately positioned.
Disclosure of Invention
In view of this, the invention provides a space discharge positioning array and a method for determining a position of a space discharge source thereof, and aims to solve the problem of inaccurate positioning of the conventional positioning device.
In one aspect, the present invention provides a spatial discharge positioning array, including: the device comprises an antenna fixing device, a signal processing device and at least four sensors; wherein, the antenna fixing device includes: 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 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 end part of the third support arm; the first support arm and the second support arm are both connected with the sensors, the third support arm is provided with at least two sensors along the length direction, and the sensors 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 and used for receiving the calculation signals and determining the position of the space discharge source according to the calculation signals.
Further, in the above space discharge positioning array, the third arm includes: the first bending part, the second bending part and the connecting part; the included angles of the first support arm, the second support arm and the third support arm are respectively a first preset angle and a second preset angle; the first bending part and the second bending part are respectively arranged at two sides of the connecting part and are connected with the end part of the connecting part, and the included angles between the first bending part and the connecting part and the included angles between the second bending part and the connecting part are respectively a first preset angle and a second preset angle; the first support arm is connected with the first bending part and arranged in a collinear way; the second support arm is connected with the second bending part and is arranged in a collinear way; the connecting part is provided with at least two sensors along the length direction.
Further, in the space discharge positioning array, a second end of the first support arm is connected with the sensor; the second end of the second support arm is connected with the sensor; both ends of the connecting part are connected with the sensor.
Furthermore, in the space discharge positioning array, the first support arm, the second support arm and the third support arm are provided with lightening holes.
Further, in the space discharge positioning array, the first arm, the second arm and the third arm are in the same plane.
Further, in the space discharge positioning array, each of the sensors is connected to the antenna fixing device through a bolt.
Further, in the space discharge positioning array, the antenna fixing device is an aluminum alloy plate.
Further, in the space discharge positioning array, the third support arm is provided with a fixing mechanism, and the fixing mechanism is used for supporting the antenna fixing device.
Further, in the above space discharge positioning array, the space discharge positioning array further includes: 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.
The space discharge positioning array provided by the invention arranges the sensors along the vertical and horizontal directions, so the space discharge positioning array can increase the distance between the sensors, thereby reducing the error value of the time delay difference of the electromagnetic wave signals received between the sensors, and 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 precision of the positioning device, improves the efficiency of determining the position of the discharge source, further solves the problem of partial discharge of the discharge source in time, reduces the possibility of insulation reduction of power equipment caused by the partial discharge of the discharge source, and reduces the possibility of safety accidents of the power equipment.
In another aspect, the present invention further provides a method for determining a position of a spatial discharge source by a signal processing device in a spatial discharge localization array, where the method includes the following steps: each of the sensors is labeled as the ith sensor, i 1, 2. n is equal to the number of said sensors; determining spatial dots and spatial coordinates of each of said sensors as indicia (x)i，yi，zi) And, setting the coordinates of the space discharge source to (x)s，ys，zs) (ii) a Determining the time of each sensor receiving the electromagnetic wave signal according to the calculation signal received by the signal processing device and recording the time as ti, and setting the time difference between the time of the 1 st sensor receiving the electromagnetic wave signal and the time of the ith sensor receiving the electromagnetic wave signal as t1i(ii) a According to the analysis of the space geometry,
Ct12＝d1-d2
Ct13＝d1-d3
Ct14＝d1-d4
Ct1i＝d1-di(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 connecting any 3 ranges.
The effect of the method for determining the position of the space discharge source by the signal processing device in the space discharge positioning array provided by the invention is the same as that of the space discharge positioning array, and therefore, the description is omitted.
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 only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic structural diagram of an antenna fixing device according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a third support arm in the space discharge positioning array according to the embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a first support arm in the space discharge positioning array according to the embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a second support arm in the space discharge positioning array according to the embodiment of the present invention;
FIG. 5 is a cross-sectional view of a sensor in a space discharge positioning array according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a fixing device in the space discharge positioning array according to the embodiment of the present invention;
fig. 7 is a sectional view a-a of fig. 6.
Detailed Description
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 to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Space discharge positioning array embodiment:
referring to fig. 1, a preferred structure of an antenna fixing device provided by an embodiment of the present invention is shown. As shown, the space discharge positioning array may include: antenna fixture 1, signal processing means and at least four sensors 2. In specific implementation, the four sensors 2 can determine the position of the space discharge source, and in order to further improve the positioning accuracy, more sensors 2 can be provided, so that the number of the sensors 2 is at least four in the embodiment.
Wherein, the antenna fixing device 1 may include: a first arm 11, a second arm 12 and a third arm 13. The first arm 11 and the second arm 12 may be disposed on two sides of the third arm 13. The first arm 11 and the second arm 12 may be both disposed at an obtuse angle to the third arm 13, and a first end (an upper right end in fig. 1) of the first arm 11 and a first end (a lower left end in fig. 1) of the second arm 12 are connected to an end of the third arm 13, respectively.
In specific implementation, the first arm 11 may be disposed below (with respect to the position shown in fig. 1) the third arm 13 and forms an obtuse angle with the third arm 13, and the first end (the upper right end shown in fig. 1) of the first arm 11 may be connected to the first end (the left end shown in fig. 1) of the third arm by a bolt; the second arm 12 may be disposed above the third arm 13 (relative to the position shown in fig. 1) and at an obtuse angle to the third arm 13, and the first end (the lower left end in fig. 1) of the second arm 12 may be connected to the second end (the right end in fig. 1) of the third arm by a bolt. Preferably, the first arm 11 and the second arm 12 may be at the same angle with the third arm 13 to increase the stability of the antenna fixing device 1. Further preferably, the first arm 11, the second arm 12 and the third arm 13 may be integrally formed to increase the strength of the antenna fixing device 1.
The first arm 11 and the second arm 12 can be connected with a sensor 2, the third arm 13 can be provided with at least two sensors 2 along the length direction, and the sensors 2 can be used for receiving electromagnetic wave signals emitted by the space discharge source and emitting calculation signals to the signal processing device. In specific implementation, a sensor may be connected to the first arm 11 and the second arm 12, two sensors 2 may be disposed on the third arm 13 along the length direction (the horizontal direction shown in fig. 1), and other sensors 2 may be disposed on the first arm 11, the second arm 12, or/and the third arm 13. The sensor 2 can receive the electromagnetic wave signal emitted by the space discharge source, record and save the time of receiving the electromagnetic wave signal, and simultaneously emit a calculation signal to the signal processing device. The antenna fixing device 1 is connected with the sensors 2 according to a certain arrangement mode, preferably, in order to further increase the positioning precision of the space discharge positioning array, the sensors 2 are arranged in a Z shape after being fixed,
a signal processing device may be electrically connected to each sensor 2 for receiving the calculation signal and determining the position of the space discharge source from 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 of the space discharge source, namely the three-dimensional coordinates according to the time delay difference settlementLocation. After the position of the sensor 2 is determined, there is a one-to-one correspondence between the position of the space discharge source and the time difference of receiving the electromagnetic wave signal by each sensor, and the one-to-one correspondence will be described in detail below. The three-dimensional coordinate of the known ith sensor is (x)i，yi，zi) Assuming that the three-dimensional coordinates of the spatial discharge source are (x)s，ys，zs) The difference between the time when the 1 st sensor receives the signal and the time when the ith sensor receives the signal is t1iFrom the spatial geometry analysis, it can be known that:
Ct12＝d1-d2
Ct13＝d1-d3
Ct14＝d1-d4
Ct1i＝d1-di(1)
in the formula (d)iThe distance from the source of the space discharge to the ith sensor, wherein,
The space discharge positioning array provided by the invention can arrange a plurality of sensors along the vertical and horizontal directions, so that the space discharge positioning array can increase the distance between the sensors, thereby reducing the error of time difference of receiving electromagnetic wave signals among the sensors, and reducing the error of determining the position of the space discharge source according to the time difference, so that the space discharge positioning array improves the positioning precision of the positioning device, improves the efficiency of determining the position of the discharge source, further solves the problem of partial discharge of the discharge source in time, reduces the possibility of insulation reduction of power equipment caused by the partial discharge of the discharge source, and reduces the possibility of safety accidents of the power equipment.
Referring to fig. 1 and 2, further, the third arm 13 may include a first bent portion 131, a second bent portion 132 and a connecting portion 133, wherein the included angles between the first arm 11, the second arm 12 and the connecting portion 133 of the third arm 13 are a first preset angle α and a second preset angle β, the first bent portion 131 and the second bent portion 132 are disposed on two sides of the connecting portion 133 and connected to the end of the connecting portion 133, and the included angles between the first bent portion 131 and the connecting portion 132 and the connecting portion 133 are a first preset angle α and a second preset angle β, respectively, in a specific implementation, the first bent portion 131 may be disposed below the connecting portion 133 (relative to the position shown in fig. 2), and the included angle between the first bent 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, one end (the upper right end shown in fig. 2) of the first bent portion 131 may be connected to the first end (the left end shown in fig. 2) of the connecting portion 133, the second bent portion 132 may be disposed above the connecting portion 133 (the right end β shown in fig. 2) and the included angle shown in fig. 2, and the included angle between the right end of the connecting portion 133 and the second arm 133.
In particular, the first end (the upper right end shown in fig. 1) of the first arm 11 may be connected to the second end (the lower left end shown in fig. 1) of the first bent portion 131, and the first end (the lower left end shown in fig. 1) of the second arm 12 may be connected to the second end (the upper right end shown in fig. 1) of the second bent portion 132, and the included angle between the first bent 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, so that the first bent portion 131 and the first arm 11 are disposed in a collinear manner, and the second bent portion 132 and the second arm 12 are disposed in a collinear manner.
The connecting portion 133 is provided with at least two sensors 2 along the longitudinal direction (horizontal direction shown in fig. 1).
In this embodiment, the third arm 13 is a bent member, and has a simple structure and is easy to manufacture. In addition, the strength of the bending connection part of the bending piece is high, the strength of the third support arm 13 can be increased, and the service life of the third support arm is prolonged.
With continued reference to fig. 1 and 2, further, the second end (the lower left end in fig. 1) of the first arm 11 is connected to the sensor 2, the second end (the upper right end in fig. 1) of the second arm 12 is connected to the sensor 2, and both ends of the connecting portion 133 are connected to the sensor 2. In specific implementation, 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 are both connected with one sensor 2. Of course, other sensors 2 may be disposed at other positions of the first arm 11, the second arm 12, or/and the third arm 13, and the embodiment is not limited thereto.
In this embodiment, the sensors 2 are disposed at the ends of the first arm 11, the second arm 12 and the connecting portion 133, so that the spatial positions of the antenna fixing device 1 can be fully utilized, the distance between the sensors 2 can be further increased, and the positioning accuracy of the space discharge positioning array can be further increased.
Referring to fig. 2 to 4, in the above embodiments, the first arm 11, the second arm 12 and the third arm 13 of the antenna are provided with a plurality of weight-reducing holes in parallel. In specific implementation, the lightening holes can be arranged side by side 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 holes may be diamond-shaped holes or circular holes, and the shape of the weight-reducing holes is not limited in this embodiment. In addition, the lightening holes may be through holes or blind holes, and the embodiment does not limit the lightening holes at all.
It can be seen that, in the present embodiment, the weight of the antenna fixing device 1 can be reduced by the weight-reducing holes, and the material and manufacturing cost can be saved.
Further, referring to fig. 1, the first arm 11, the second arm 12 and the third arm 13 may be in the same plane. Preferably, to reduce the computational difficulty, the sensors 2 may be arranged on the same side of the antenna fixture 1, i.e. the sensors 2 may 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, so that the delay difference of the plurality of sensors 2 receiving the electromagnetic wave signals is increased, and meanwhile, the sensor 2 can be prevented from being blocked or interfered by other sensors 2 to cause low positioning accuracy, so that the positioning accuracy of the space discharge positioning array can be further improved. In addition, the first arm 11, the second arm 12 and the third arm 13 are in the same plane, so that the processing and assembly are convenient.
Further, each sensor 2 may be connected to the antenna fixture 1 by a bolt. In particular, to increase the stability of the sensors 2, each sensor 2 may be connected to the antenna fixture 1 by a plurality of bolts. In this embodiment, this structure assembly is simple to the bolt is the standard part, and purchase is simple with low costs.
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 portability, so that the mechanical properties of the antenna fixing device 1 are improved, the mass of the antenna fixing device 1 is reduced, and the antenna fixing device 1 is convenient to transport and carry.
With continued reference to fig. 1, 6 and 7, further, the third arm 13 may be provided with a fixing mechanism 3, the fixing mechanism 3 being used for supporting the antenna fixing device 1. In specific implementation, the fixing device 3 may be disposed below the center position of the connecting portion 133 of the third arm 13 (relative to the position shown in fig. 1), and the fixing device 3 may be provided with two threaded through holes arranged in parallel, and the bolts are inserted into the threaded through holes to connect with the connecting portion 133.
It can be seen that, in this embodiment, the arrangement of the fixing mechanism 3 can increase the fixing stability of the space discharge positioning array, and can be directly placed at a position to be tested for testing.
The spatial discharge positioning array may further comprise an image acquisition device (not shown in fig. 1) for acquiring and displaying an image 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 space discharge source in the image.
Referring to fig. 2, in a specific implementation, a circular through hole may be formed in a center position of the connecting portion 133, a threaded hole may be formed in a top portion (relative to the position of fig. 2) of the circular through hole of the connecting portion 133, the image capturing device may be inserted into the circular through hole, and a bolt is inserted into the threaded hole to be connected with the image capturing device and fix the image capturing device. The image acquisition equipment can acquire the image in one direction of the discharge area, the image acquisition device can be rotated after the bolt is loosened to acquire the images in different directions, and the image acquisition device can also acquire the images in all directions of the discharge area and display the images in the discharge area. The signal processing device can identify the position of the spatial discharge source determined by the signal processing device on the displayed image in an asterisk or other obvious forms.
It can be seen that, in this embodiment, the image capturing device may display the device of the discharge area in the form of an image, and may display the position of the discharge source determined by the signal processing apparatus in the form of a visible image, so that the detecting person may directly determine the space area of the discharge source, the device of the space discharge, and the specific part of the space discharge device that discharges through the image. Therefore, the space discharge positioning array can present the position of the space discharge source in an image form, so that the space discharge source is clear at a glance, and the time for estimating the space discharge equipment and the specific discharge position through coordinates is reduced.
The space discharge positioning array provided in the present embodiment will be described in more detail below.
As shown in fig. 1 to 7, the space discharge positioning array includes an antenna fixture 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 rhombic weight-reducing through holes are uniformly arranged on the antenna fixing device 1 in parallel. The antenna fixing device 1 comprises a first arm 11, a second arm 12 and a third arm 13 which are arranged 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 the first bending portion 131, the second bending portion 132 and the connecting portion 133 are 152mm, 152mm and 1004mm, the first bending portion 131 and the second bending portion 132 have the same structure, two circular through holes are arranged in parallel at a second end (a lower left end shown in fig. 2) of the first bending portion 131 and a second end (an upper right end shown in fig. 2) of the second bending portion 132, and a circular through hole is arranged at a center of the connecting portion 132 for installing an image capturing device. The connecting portion 133 is disposed horizontally (with respect to the position of fig. 2), the first bent portion 131 is disposed below the connecting portion 133 (with respect to the position of fig. 2), the first bent portion 131 is disposed at 145 ° with respect to the connecting portion 133, and the third arm 13 is disposed substantially in a Z shape as a whole. A first end (upper right end shown in fig. 2) of the first bent portion 131 is connected to a first end (left end shown in fig. 2) of the connecting portion 133, a first end (lower left end shown in fig. 2) of the second bent portion 132 is connected to a second end (right end shown in fig. 2) of the connecting portion 133, and the first bent portion 131, the second bent portion 132 and the connecting portion 133 are integrally formed. First support arm 11 and second support arm 12 are the straight board of 700 mm's length aluminum alloy and the structure is the same, and the both ends of first support arm 11 and second support arm 12 all are provided with two screw holes side by side, are connected with third support arm 13 and sensor 2 respectively, and in addition, sensor 2 all arranges the coplanar in. A circular through hole is formed between the two threaded holes at the second end (the right end shown in fig. 3) of the first support arm 11 and the second end (the right end shown in fig. 4) of the second support arm 12. The first arm 11 and the second arm 12 are respectively disposed in a collinear manner at the first bending portion 131 and the second bending portion 132, and a first end (upper right end shown in fig. 1) of the first arm 11 is connected to a second end (lower left end shown in fig. 1) of the first bending portion 131 through a bolt, and a first end (lower left end shown in fig. 1) of the second arm 12 is connected to a second end (upper right end shown in fig. 1) of the second bending portion 132 through a bolt, so that the antenna fixing device 1 is centrosymmetric with respect to the circular through hole at the center of the connecting portion 133. The sensor 2 is a sensor, the housing is frustum-shaped, the PCB of the sensor is connected to the top of the housing (relative to the position shown in fig. 5) by bolts, and the bottom is provided with two threaded holes and a circular through hole for fixing and routing respectively. The second end (the lower left end shown in fig. 1) of the first arm 11 and the second end (the upper right end shown in fig. 1) of the second arm 12 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 respectively connected with the third sensor 203 and the fourth sensor 204 through bolts, and the antenna fixing device 1 is connected with the sensor 2 and located below the circular through hole of the sensor 2, and is provided with a circular through hole for routing the sensor 2, wherein the horizontal and vertical distances between the first sensor 201 and the third sensor 203 are 700mm, the horizontal and vertical distances between the second sensor 202 and the fourth sensor 204 are 700mm, the third sensor 203 and the fourth sensor 204 are horizontally arranged, and the horizontal distance is 700 mm. The fixing mechanism 3 has two screw holes formed in parallel in the horizontal direction (with respect to the position shown in fig. 6), the bottom of the circular through hole at the center of the connecting portion 133 (with respect to the position shown in fig. 1) has two screw holes formed in parallel in the horizontal direction, and the fixing mechanism 3 is disposed below the connecting portion 133 (with respect to the position shown in fig. 1) and connected to the bottom of the connecting portion 133 by a bolt. A screw hole is also formed at the top (with respect to the position shown in fig. 1) of the circular through hole at the center of the connecting portion 133, and a bolt is inserted into the screw hole to fix the image pickup device to the circular through hole at the center of the connecting portion 133. The center of the circular through hole at the center of the connecting portion 133 is an origin, i.e., coordinates are (0, 0, 0), and the three-dimensional coordinates of the first sensor 201, the second sensor 202, the third sensor 203, and the fourth sensor 204 are (-105, -70, 0), (-105, 70, 0), (-35, 0, 0), and (35, 0, 0), respectively. And the signal processing device determines the three-dimensional coordinate, namely the position, of the space discharge source according to the time delay difference settlement, and displays the position in the form of asterisk at the corresponding position of the image acquisition and display image.
In summary, the spatial discharge positioning array provided by the invention arranges the plurality of sensors along the up-down and left-right directions, so that the spatial discharge positioning array is beneficial to receiving electromagnetic wave signals in different directions, and the distance between the plurality of sensors can be increased, so that the time difference error value of receiving the electromagnetic wave signals among the plurality of sensors is reduced, and the error of determining the position of the spatial discharge source according to the time difference is reduced, so that the spatial discharge positioning array improves the positioning precision of the positioning device, improves the efficiency of determining the position of the discharge source, further solves the problem of partial discharge of the discharge source in time, reduces the possibility of insulation reduction of power equipment caused by partial discharge of the discharge source, and reduces the possibility of safety accidents of the power equipment.
The embodiment of the method for determining the position of the space discharge source by the signal processing device in the space discharge positioning array comprises the following steps:
the signal processing device in the space discharge positioning array can receive the time when the sensor receives the electromagnetic wave signal, and determine the three-dimensional coordinate, namely the position, of the space discharge source according to the time delay difference settlement.
Each sensor 2 is labeled as the ith sensor, i 1, 2.... n; n is equal to the number of said sensors 2. Specifically, each sensor 2 is labeled one by one, and the ith sensor is labeled, where i is 1, 2.
Determining the spatial dots and the spatial coordinates of each of said sensors (2) as a marker (x)i，yi，zi) And, setting the coordinates of the space discharge source to (x)s，ys，zs). Specifically, if a spatial point is set as a dot and the coordinates thereof are (0, 0, 0), the three-dimensional coordinates of the i-th sensor are known as (x)i，yi，zi) And assuming that the three-dimensional coordinates of the spatial discharge source are (x)s，ys，zs)。
The time of receiving the electromagnetic wave signal by each sensor 2 is determined according to the receiving of the calculation signal by the signal processing device and is recorded as tiAnd, the time difference between the time when the 1 st sensor receives the electromagnetic wave signal and the time when the ith sensor receives the electromagnetic wave signal is set as t1i。
According to the spatial geometrical analysis, the following can be known:
Ct12＝d1-d2
Ct13＝d1-d3
Ct14＝d1-d4
Ct1i＝d1-di(1)
in the formula (d)iThe distance from the source of the space discharge to the ith sensor, wherein,
The effect of the method for determining the position of the space discharge source by the signal processing device in the space discharge positioning array provided in this embodiment is the same as that of the space discharge positioning array, and therefore, the description is omitted.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such 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 such 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 content of the first and second substances,
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 content of the first and second substances,
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，yi，zi) And, setting the coordinates of the space discharge source to (x)s，ys，zs)；
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 tiAnd, 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 t1i；
According to the analysis of the space geometry,
Ct12＝d1-d2
Ct13＝d1-d3
Ct14＝d1-d4
Ct1i＝d1-di(1)
in the formula (d)iThe distance from the space discharge source to the ith sensor, wherein,
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| CN106159447A (en) * | 2015-04-14 | 2016-11-23 | 启碁科技股份有限公司 | Smart antenna module and omnidirectional antenna |
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| US20030025646A1 (en) * | 2001-08-02 | 2003-02-06 | Kirby Chung | Built-in test stimulation for antenna array |
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| CN103969559A (en) * | 2014-05-15 | 2014-08-06 | 国家电网公司 | Method and system for positioning local discharge space of power equipment of transformer substation |
| CN106159447A (en) * | 2015-04-14 | 2016-11-23 | 启碁科技股份有限公司 | Smart antenna module and omnidirectional antenna |
| CN105116289A (en) * | 2015-08-25 | 2015-12-02 | 胡达凯 | Substation partial discharge signal detection apparatus |
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