GIS ultrahigh frequency partial discharge sensor antenna and partial discharge signal noise reduction method

Abstract

The invention relates to the technical field of partial discharge verification anti-interference, and particularly discloses a GIS ultrahigh frequency partial discharge sensor antenna and a partial discharge signal noise reduction method, and the sensor antenna comprises an antenna substrate, a sensor interface, a housing provided with a pit, and an antenna body used for collecting an ultrahigh frequency partial discharge signal of a GIS. The antenna substrate covers the pit of the shell to form a target cavity; the antenna body is arranged on the antenna substrate, the sensor interface is arranged on the shell, and the sensor interface is used for receiving a target partial discharge signal collected by the antenna body and transmitting the target partial discharge signal when an antenna termination angle of the antenna body is adjusted to a target angle. The terminal angle of the sensor antenna is changed, and the anti-interference shell is additionally arranged on the outer side of the sensor antenna, so that the sensor is in one-way radiation, the antenna noise frequency band signal gain is changed to avoid common ultrahigh-frequency electromagnetic noise, receiving of external partial discharge signals is reduced, and the signal gain of the partial discharge sensor is improved; and the detection sensitivity is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of partial discharge verification and anti-interference, and in particular to a GIS ultra-high frequency partial discharge sensor antenna and a partial discharge signal noise reduction method. Background Art

[0002] For UHF sensors installed on GIS, the electromagnetic environment at the site, such as the substation, is complex. UHF sensors often use planar spiral antennas, which have the characteristic of bidirectional radiation. The sensors are prone to receive partial discharge signals generated by other external electrical equipment, thus misjudging whether partial discharge occurs inside the GIS.

[0003] Therefore, it is urgent to provide a technical solution to solve the above problems. Summary of the invention

[0004] In order to solve the technical problem that the UHF partial discharge sensor mistakenly receives external partial discharge signals in the complex electromagnetic environment of the substation, the present invention provides a GIS UHF partial discharge sensor antenna and a partial discharge signal noise reduction method.

[0005] In a first aspect, the present invention provides a GIS ultra-high frequency partial discharge sensor antenna, and the technical solution of the GIS ultra-high frequency partial discharge sensor antenna is as follows:

[0006] It comprises: an antenna substrate, a sensor interface, a shell with a pit and an antenna body for collecting ultra-high frequency partial discharge signals of GIS; the antenna substrate is covered on the pit of the shell to form a target cavity; the antenna body is arranged on the antenna substrate, the sensor interface is arranged on the shell, and the sensor interface is used to: when the antenna termination angle of the antenna body is adjusted to the target angle, receive the target partial discharge signal collected by the antenna body and transmit it.

[0007] The beneficial effects of a GIS ultra-high frequency partial discharge sensor antenna of the present invention are as follows:

[0008] The GIS ultra-high frequency partial discharge sensor antenna of the present invention changes the termination angle of the sensor antenna and adds an anti-interference shell installed on the outside of the sensor antenna, so that the sensor becomes unidirectional radiation and changes the signal gain of the antenna noise frequency band to avoid common ultra-high frequency electromagnetic noise, reduce the reception of external partial discharge signals, improve the signal gain of the partial discharge sensor, and improve the detection sensitivity.

[0009] On the basis of the above solution, the GIS ultra-high frequency partial discharge sensor antenna of the present invention can also be improved as follows.

[0010] In an optional manner, the diameter of the antenna substrate is greater than the diameter of the antenna body.

[0011] In an optional manner, the antenna substrate is made of FR-4 epoxy resin.

[0012] In an optional manner, the antenna body includes: a first spiral arm and a second spiral arm; the first spiral arm and the second spiral arm are centrally symmetrical and extend outward along an Archimedean spiral.

[0013] In an optional manner, the antenna starting angle of the first rotary arm is 0°, the antenna starting angle of the second rotary arm is 180°, the antenna ending angle of the first rotary arm and the antenna ending angle of the second rotary arm are the target angles; wherein the target angle is determined based on the high-proportion noise at the site.

[0014] In an optional manner, the housing is made of aluminum alloy.

[0015] In an optional manner, the depth of the target cavity is: 1 / 4 of the wavelength corresponding to the high-occupancy noise frequency at the scene.

[0016] In an optional manner, the radius of the target cavity is 1 / eπ of the wavelength corresponding to the center frequency of the antenna.

[0017] In a second aspect, the present invention provides a method for reducing noise of a partial discharge signal, and the technical solution of the method is as follows:

[0018] When the antenna termination angle of the GIS ultra-high frequency partial discharge sensor antenna is adjusted to a target angle, a target partial discharge signal collected by the GIS ultra-high frequency partial discharge sensor antenna is received.

[0019] The beneficial effects of a partial discharge signal noise reduction method of the present invention are as follows:

[0020] The method of the present invention can avoid common ultra-high frequency electromagnetic noise, reduce the reception of external partial discharge signals, further improve the signal gain of the partial discharge sensor, and improve the detection sensitivity.

[0021] On the basis of the above scheme, a method for reducing noise of a partial discharge signal of the present invention can also be improved as follows.

[0022] In an optional manner, the method further includes:

[0023] The target partial discharge signal is output and displayed.

[0024] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present invention. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings. In the accompanying drawings:

[0026] Figure 1 It is a structural schematic diagram of an embodiment of a GIS ultra-high frequency partial discharge sensor antenna of the present invention;

[0027] Figure 2 This is a simulation diagram of the antenna body. DETAILED DESCRIPTION

[0028] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0029] Figure 1 FIG. 1 is a schematic diagram showing a structural embodiment of a GIS ultra-high frequency partial discharge sensor antenna provided by the present invention. Figure 1 As shown, the GIS ultra-high frequency partial discharge sensor antenna includes: an antenna substrate 1, a sensor interface 2, a shell 3 with a pit and an antenna body 4 for collecting ultra-high frequency partial discharge signals of GIS; the antenna substrate 1 is covered on the pit of the shell 3 to form a target cavity; the antenna body 4 is arranged on the antenna substrate 1, and the sensor interface 2 is arranged on the shell 3.

[0030] The sensor interface 2 is used to receive and transmit the target partial discharge signal collected by the antenna body 4 when the antenna termination angle of the antenna body 4 is adjusted to the target angle.

[0031] The line width of the antenna body 4 is 6.7 mm, the number of turns of the antenna body 4 is n turns, and n is a positive integer; the inner diameter of the antenna body 4 is 5 mm, and the line height of the antenna body 4 is 0.035 mm.

[0032] The sensor interface 2 can be connected to an oscilloscope or a partial discharge detection system, and the sensor interface 2 outputs and displays the target partial discharge signal collected by the antenna body 4 .

[0033] The housing 3 is a concave body (pit) with an opening, and the antenna substrate 1 is covered on the concave body (pit) to form a target cavity.

[0034] In an optional manner, the diameter of the antenna substrate 1 is greater than the diameter of the antenna body 4 .

[0035] The diameter of the antenna substrate 1 in this embodiment is slightly larger than the diameter of the antenna body 4. The thickness h of the antenna substrate 1 is 基 The thickness of the antenna substrate 1 is 1.2 mm, and the antenna substrate 1 is made of FR-4 epoxy resin.

[0036] In an optional manner, the antenna body 4 includes: a first rotary arm and a second rotary arm.

[0037] Among them, Figure 2 As shown, the first spiral arm and the second spiral arm are centrally symmetrical and extend outward along the Archimedean spiral. The antenna starting angle of the first spiral arm is 0°, the antenna starting angle of the second spiral arm is 180°, and the antenna ending angle of the first spiral arm and the antenna ending angle of the second spiral arm are the target angle θ=πf n / f c , that is: the angle between the internal starting end and the external ending end of the antenna body 4; wherein the target angle is based on the high proportion of noise f n OK, f c is the antenna center frequency.

[0038] In an optional manner, the shell 3 is made of aluminum alloy, and the target cavity formed by the shell 3 and the antenna substrate 1 can achieve an anti-interference shielding effect.

[0039] In an optional manner, the depth h of the target cavity is: the frequency of the high-occupancy noise at the scene f n Corresponding to 1 / e of wavelength, that is, h = u / ef n ; u represents the speed of electromagnetic waves, u / f n Indicates the frequency of high-proportion noise on site f n Corresponding wavelength.

[0040] In an optional manner, the radius r1 of the target cavity is equal to the antenna center frequency f c Corresponding to 1 / 4π of the wavelength, that is: r1=u / 4πf c ;u / f c Indicates the center frequency of the antenna f c Corresponding wavelength.

[0041] The technical solution of this embodiment changes the termination angle of the sensor antenna and adds an anti-interference housing installed on the outside of the sensor antenna, so that the sensor becomes unidirectional radiation and changes the signal gain of the antenna noise frequency band to avoid common ultra-high frequency electromagnetic noise, reduce the reception of external partial discharge signals, improve the signal gain of the partial discharge sensor, and improve the detection sensitivity.

[0042] The embodiment of the present invention provides a method for reducing noise of a partial discharge signal, using a GIS ultra-high frequency partial discharge sensor antenna as described in the present invention, comprising the following steps:

[0043] When the antenna termination angle of the GIS UHF partial discharge sensor antenna is adjusted to the target angle, the target partial discharge signal collected by the GIS UHF partial discharge sensor antenna is received.

[0044] In an optional manner, the method further includes:

[0045] The target partial discharge signal is output and displayed.

[0046] The technical solution of this embodiment can avoid common ultra-high frequency electromagnetic noise, reduce the reception of external partial discharge signals, further enhance the signal gain of the partial discharge sensor, and improve the detection sensitivity.

[0047] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. Similarly, in order to simplify the present invention and help understand one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, the various features of the embodiments of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. Wherein, the claims that follow the specific embodiment are hereby expressly incorporated into the specific embodiment, wherein each claim itself is a separate embodiment of the present invention.

[0048] It should be noted that the above embodiments illustrate the present invention rather than limit it, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets shall not be construed as a limitation on the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention may be implemented by means of hardware comprising a number of different elements and by means of a suitably programmed computer. In a unit claim enumerating a number of devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words may be interpreted as names. The steps in the above embodiments, unless otherwise specified, should not be understood as limitations on the order of execution.

Claims

1. A GIS ultra-high frequency partial discharge sensor antenna, characterized in that: include: An antenna substrate, a sensor interface, a shell with a pit and an antenna body for collecting ultra-high frequency partial discharge signals of GIS; the antenna substrate is covered on the pit of the shell to form a target cavity; the antenna body is arranged on the antenna substrate, the sensor interface is arranged on the shell, and the sensor interface is used to: when the antenna termination angle of the antenna body is adjusted to the target angle, receive the target partial discharge signal collected by the antenna body and transmit it.

2. The GIS ultra-high frequency partial discharge sensor antenna according to claim 1, characterized in that: The diameter of the antenna substrate is greater than the diameter of the antenna body.

3. The GIS UHF partial discharge sensor antenna according to claim 1, characterized in that: The antenna substrate is made of FR-4 epoxy resin.

4. The GIS UHF partial discharge sensor antenna according to claim 1, characterized in that: The antenna body comprises: a first spiral arm and a second spiral arm; the first spiral arm and the second spiral arm are centrally symmetrical and extend outward along an Archimedean spiral.

5. The GIS UHF partial discharge sensor antenna according to claim 4, characterized in that: The antenna starting angle of the first rotary arm is 0°, the antenna starting angle of the second rotary arm is 180°, the antenna ending angle of the first rotary arm and the antenna ending angle of the second rotary arm are the target angles; wherein the target angle is determined according to the high-proportion noise at the scene.

6. The GIS UHF partial discharge sensor antenna according to claim 1, characterized in that: The shell is made of aluminum alloy.

7. The GIS UHF partial discharge sensor antenna according to claim 1, characterized in that: The depth of the target cavity is: 1 / 4 of the wavelength corresponding to the high-proportion noise frequency at the scene.

8. The GIS UHF partial discharge sensor antenna according to claim 1, characterized in that: The radius of the target cavity is 1 / eπ of the wavelength corresponding to the center frequency of the antenna.

9. A method for reducing noise of partial discharge signals, using the GIS ultra-high frequency partial discharge sensor antenna according to any one of claims 1 to 8, characterized in that: include: When the antenna termination angle of the GIS ultra-high frequency partial discharge sensor antenna is adjusted to a target angle, a target partial discharge signal collected by the GIS ultra-high frequency partial discharge sensor antenna is received.

10. The method for reducing noise of partial discharge signals according to claim 9, characterized in that: Also includes: The target partial discharge signal is output and displayed.

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