GIS partial discharge ultrahigh frequency sensor on-site calibration method and GIS partial discharge ultrahigh frequency sensor on-site calibration device

Abstract

The embodiment of the invention provides a GIS partial discharge ultrahigh frequency sensor field calibration method and device. The technical problem that a GIS partial discharge ultrahigh frequency sensor cannot be calibrated on site can be solved. The method comprises the steps that a partial discharge signal generator outputs a first electric signal to a first standard ultrahigh frequency sensor; the first standard ultrahigh frequency sensor receives the first electric signal, converts the first electric signal into an electromagnetic wave signal, and transmits the electromagnetic wave signal to the ultrahigh frequency sensor to be tested; the ultrahigh frequency sensor to be tested receives the electromagnetic wave signal, converts the electromagnetic wave signal into a second electric signal, and transmits the second electric signal to the signal processing and analyzing module; the signal processing and analyzing module is used for analyzing the second electric signal to obtain an analysis result; and the signal processing and analysis module sends an analysis result to the upper computer so as to visualize the analysis result. Thus, the ultrahigh frequency sensor to be tested can be calibrated on site without disassembly, the calibration efficiency is improved, and the calibration period is shortened.

Description

Technical Field

[0001] The present application relates to the field of sensor calibration technology, and in particular to a method and device for on-site calibration of a GIS partial discharge ultra-high frequency sensor. Background Art

[0002] Partial discharge is a common insulation defect in gas insulated switchgear (GIS). It seriously affects the operation safety of the equipment. UHF sensors have been widely used in partial discharge detection of GIS due to their high sensitivity to partial discharge signals and their ability to resist electromagnetic interference. In order to ensure the detection accuracy of UHF sensors, it is necessary to calibrate the UHF sensors.

[0003] At present, the calibration of UHF sensors is mainly concentrated on factory testing. Since it is difficult to disassemble UHF sensors when they are installed on GIS equipment, UHF sensors cannot be calibrated during operation.

[0004] However, affected by the on-site environment and complex electromagnetic interference, the performance of the UHF sensor will decline, which will lead to errors in the detection results. Therefore, how to calibrate the GIS partial discharge UHF sensor on site has become an urgent problem to be solved. Summary of the invention

[0005] The embodiments of the present application provide a method and device for on-site calibration of a GIS partial discharge ultra-high frequency sensor, which can solve the technical problem that a GIS partial discharge ultra-high frequency sensor cannot be calibrated on-site.

[0006] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0007] In the first aspect, an embodiment of the present application provides a GIS partial discharge ultra-high frequency sensor on-site calibration method, which includes: a partial discharge signal generator outputs a first electrical signal to a first standard ultra-high frequency sensor; the first electrical signal includes a signal emitted by a calibration pulse signal source with adjustable amplitude, which is confirmed according to the pulse amplitude and pulse width, and the pulse amplitude is confirmed according to the attenuation of the ultra-high frequency signal; the partial discharge signal generator is connected to the first standard ultra-high frequency sensor through a coaxial cable; the first standard ultra-high frequency sensor receives the first electrical signal, converts the first electrical signal into an electromagnetic wave signal, and transmits the electromagnetic wave signal to the ultra-high frequency sensor to be tested; the first standard ultra-high frequency sensor is fixed on the outer wall of a basin insulator; the ultra-high frequency sensor to be tested receives the electromagnetic wave signal, converts the electromagnetic wave signal into a second electrical signal, and transmits the second electrical signal to a signal processing and analysis module; the ultra-high frequency sensor to be tested and the signal processing and analysis module are connected through a coaxial cable; the signal processing and analysis module is used to analyze the second electrical signal to obtain an analysis result; the signal processing and analysis module sends the analysis result to a host computer to visualize the analysis result; the host computer and the signal processing and analysis module are connected through a coaxial cable.

[0008] Based on the above description of the GIS partial discharge UHF sensor on-site calibration method provided by the embodiment of the present application, it can be known that the GIS partial discharge UHF sensor on-site calibration method includes a partial discharge signal generator outputting an amplitude-adjustable calibration pulse signal source to a standard UHF sensor, the standard UHF sensor converting an electrical signal into an electromagnetic wave signal and transmitting it to the UHF sensor to be tested, the UHF sensor to be tested converting the received signal into an electrical signal and transmitting it to the signal processing and analysis module, and finally displaying the analysis result in the host computer, which can realize regular calibration of the UHF sensor and thus ensure the accuracy of the test results. In addition, the UHF sensor to be tested on the GIS can be calibrated on-site without disassembling it, which helps to improve the calibration efficiency of the UHF sensor and ensure the reliability of the sensor.

[0009] In addition, the calibration of UHF sensors can be carried out on site, shortening the sensor calibration cycle.

[0010] In a feasible implementation of the first aspect, the GIS partial discharge UHF sensor on-site calibration method further includes: a second standard UHF sensor is arranged at an outer wall of the pot-type insulator and at a position at a first preset distance from the first standard UHF sensor; the first standard UHF sensor and the second standard UHF sensor are both located on the central axis of the pot-type insulator;

[0011] The calculation formula for the attenuation of the UHF signal includes:

[0012]

[0013] Among them, U1 represents the maximum amplitude of the signal transmitted by the first standard ultra-high frequency sensor; U2 represents the maximum amplitude of the signal received by the second standard ultra-high frequency sensor; and L represents the first preset distance.

[0014] In a feasible implementation of the first aspect, a calculation formula for the first electrical signal Y0(t) includes:

[0015]

[0016] Among them, τ represents the pulse width; A0 represents the pulse amplitude, A0=ηL s +λlnU c ; η is the attenuation of the UHF signal, in V / m; L s is the straight-line distance between the first standard UHF sensor and the sensor to be tested, in meters; λ is the dielectric loss coefficient of the GIS equipment; U c It is the voltage level of gas insulated switchgear, in kV.

[0017] In a feasible implementation manner of the first aspect, the first standard UHF sensor adopts an UHF sensor based on an Archimedean spiral antenna.

[0018] In a feasible implementation of the first aspect, a calculation formula for the outer diameter D of the Archimedean spiral antenna includes:

[0019]

[0020] Where c is the speed of light; u is the Poisson's ratio of the material used in the antenna; f L is the lower limit operating frequency of the antenna, in Hz; μ r The relative magnetic permeability of the material used for the antenna;

[0021] The calculation formula for the inner diameter 2r0 of the Archimedean spiral antenna includes:

[0022]

[0023] Among them, f H is the upper limit operating frequency of the antenna, in Hz;

[0024] The calculation formula for the number of spiral turns N of the Archimedean spiral antenna includes:

[0025]

[0026] Where η is the attenuation of the UHF signal, in V / m; U c It is the voltage level of gas insulated switchgear, in kV.

[0027] In the second aspect, the embodiment of the present application provides a GIS partial discharge ultra-high frequency sensor on-site calibration device, including: a partial discharge signal generator, a first standard ultra-high frequency sensor, a signal processing and analysis module and a host computer; the partial discharge signal generator is used to output a first electrical signal to the first standard ultra-high frequency sensor; the first electrical signal includes a signal emitted by a calibration pulse signal source with adjustable amplitude, which is confirmed according to the pulse amplitude and pulse width; the pulse amplitude is confirmed according to the attenuation of the ultra-high frequency signal; the partial discharge signal generator is connected to the first standard ultra-high frequency sensor via a coaxial cable; the first standard ultra-high frequency sensor is used to receive the first electrical signal and convert the first electrical signal into The signal is converted into an electromagnetic wave signal, and the electromagnetic wave signal is transmitted to the UHF sensor to be tested; the first standard UHF sensor is fixed on the outer wall of the basin insulator; the UHF sensor to be tested receives the electromagnetic wave signal, and converts the electromagnetic wave signal into a second electrical signal, and the second electrical signal is transmitted to the signal processing and analysis module; the UHF sensor to be tested and the signal processing and analysis module are connected through a coaxial cable; the signal processing and analysis module is used to analyze the second electrical signal to obtain an analysis result; the signal processing and analysis module is used to send the analysis result to a host computer to visualize the analysis result; the host computer and the signal processing and analysis module are connected through a coaxial cable.

[0028] In this way, the partial discharge signal generator outputs a calibration pulse signal source with adjustable amplitude to the standard UHF sensor, the standard UHF sensor converts the electrical signal into an electromagnetic wave signal and transmits it to the UHF sensor to be tested, the UHF sensor to be tested converts the received signal into an electrical signal and transmits it to the signal processing and analysis module, and finally displays the analysis result in the host computer, which can realize the regular calibration of the UHF sensor and thus ensure the accuracy of the test results. In addition, the UHF sensor to be tested on the GIS can be calibrated on site without disassembling it, which helps to improve the calibration efficiency of the UHF sensor and ensure the reliability of the sensor.

[0029] In a feasible implementation of the second aspect, the GIS partial discharge UHF sensor on-site calibration device further includes: a second standard UHF sensor; the second standard UHF sensor is arranged at the outer wall of the pot-type insulator, and the distance from the first standard UHF sensor is a first preset distance; the first standard UHF sensor and the second standard UHF sensor are both located on the central axis of the pot-type insulator;

[0030] The calculation formula for the attenuation of the UHF signal includes:

[0031]

[0032] Among them, U1 represents the maximum amplitude of the signal transmitted by the first standard ultra-high frequency sensor; U2 represents the maximum amplitude of the signal received by the second standard ultra-high frequency sensor; and L represents the first preset distance.

[0033] In a feasible implementation manner of the second aspect, a calculation formula for the first electrical signal Y0(t) includes:

[0034]

[0035] Among them, τ represents the pulse width; A0 represents the pulse amplitude, A0=ηL s +λlnU c ; η is the attenuation of the UHF signal, in V / m; L s is the straight-line distance between the first standard UHF sensor and the sensor to be tested, in meters; λ is the dielectric loss coefficient of the GIS equipment; U c It is the voltage level of gas insulated switchgear, in kV.

[0036] In a feasible implementation manner of the second aspect, the first standard UHF sensor adopts an UHF sensor based on an Archimedean spiral antenna.

[0037] In a feasible implementation of the second aspect, a calculation formula for the outer diameter D of the Archimedean spiral antenna includes:

[0038]

[0039] Where c is the speed of light; u is the Poisson's ratio of the material used in the antenna; f L is the lower limit operating frequency of the antenna, in Hz; μ r The relative magnetic permeability of the material used for the antenna;

[0040] The calculation formula for the inner diameter 2r0 of the Archimedean spiral antenna includes:

[0041]

[0042] Among them, f H is the upper limit operating frequency of the antenna, in Hz;

[0043] The calculation formula for the number of spiral turns N of the Archimedean spiral antenna includes:

[0044]

[0045] Where η is the attenuation of the UHF signal, in V / m; U c It is the voltage level of gas insulated switchgear, in kV. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 A schematic diagram of the structure of a GIS partial discharge ultra-high frequency sensor field calibration system provided in an embodiment of the present application;

[0047] Figure 2 A flow chart of a method for on-site calibration of a GIS partial discharge ultra-high frequency sensor provided in an embodiment of the present application. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present invention will be described below in conjunction with the accompanying drawings in the embodiments of the present invention. In the description of the embodiments of the present invention, unless otherwise specified, "multiple" refers to two or more than two. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0049] In addition, in order to facilitate the clear description of the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, the words "first", "second" and the like are used to distinguish the same items or similar items with substantially the same functions and effects. Those skilled in the art will understand that the words "first", "second" and the like do not limit the quantity and execution order, and the words "first", "second" and the like do not necessarily limit the difference. At the same time, in the embodiments of the present invention, the words "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or design. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete way for easy understanding.

[0050] The principles and features of the present application are described below. The examples given are only used to explain the present application and are not used to limit the scope of the present application.

[0051] The embodiment of the present application provides a method for on-site calibration of a GIS partial discharge ultra-high frequency sensor, which is suitable for sensor calibration of gas-insulated switchgear. It is possible to perform regular calibration of ultra-high frequency sensors, thereby ensuring the accuracy of the test results. In addition, it is possible to calibrate the ultra-high frequency sensor to be tested on-site without disassembling it on the GIS, which helps to improve the calibration efficiency of the ultra-high frequency sensor and ensure the reliability of the sensor. In addition, it is possible to calibrate the ultra-high frequency sensor on-site, shortening the cycle of sensor calibration.

[0052] Figure 1 This is a schematic diagram of the structure of a GIS partial discharge ultra-high frequency sensor field calibration device provided in an embodiment of the present application. Figure 1As shown, the GIS partial discharge ultra-high frequency sensor on-site calibration device includes: a partial discharge signal generator, a first standard ultra-high frequency sensor, a signal processing and analysis module and a host computer.

[0053] The partial discharge signal generator is used to output a first electrical signal to the first standard UHF sensor. The first electrical signal includes a signal emitted by a calibration pulse signal source with adjustable amplitude, which is confirmed according to pulse amplitude and pulse width. The pulse amplitude is confirmed according to the attenuation of the UHF signal. The partial discharge signal generator is connected to the first standard UHF sensor via a coaxial cable.

[0054] The first standard UHF sensor is used to receive the first electrical signal, convert the first electrical signal into an electromagnetic wave signal, and transmit the electromagnetic wave signal to the UHF sensor to be tested. The first standard UHF sensor is fixed on the outer wall of the pot insulator.

[0055] The UHF sensor to be tested receives the electromagnetic wave signal, converts the electromagnetic wave signal into a second electrical signal, and transmits the second electrical signal to the signal processing and analysis module. The UHF sensor to be tested and the signal processing and analysis module are connected via a coaxial cable.

[0056] The signal processing and analysis module is used to analyze the second electrical signal to obtain an analysis result.

[0057] The signal processing and analysis module is used to send the analysis results to the host computer to visualize the analysis results. The host computer and the signal processing and analysis module are connected via a coaxial cable.

[0058] In order to obtain the attenuation of the UHF signal, in some embodiments, the GIS partial discharge UHF sensor on-site calibration device further includes: a second standard UHF sensor.

[0059] The second standard UHF sensor is arranged at the outer wall of the pot-type insulator, and the distance from the first standard UHF sensor is the first preset distance. The first standard UHF sensor and the second standard UHF sensor are both located on the central axis of the pot-type insulator. In one implementation, a section of GIS pipe is randomly selected, the first standard UHF sensor is arranged at any position of the outer wall of the GIS pipe, and the second standard UHF sensor is arranged on the outer wall at the first preset distance L from the first standard UHF sensor, and the first UHF sensor and the second UHF sensor are sequentially located on the central axis of the outer wall of the GIS pipe. The first preset distance can be set according to experience, for example, the first preset distance is 500 mm.

[0060] The first standard UHF sensor is stimulated to transmit a signal, and the maximum amplitude U2 of the second standard UHF sensor receiving signal and the maximum amplitude U1 of the first standard UHF sensor transmitting signal are processed according to the attenuation formula to obtain the UHF signal attenuation. The calculation formula of the UHF signal attenuation includes:

[0061]

[0062] Among them, U1 represents the maximum amplitude of the signal transmitted by the first standard ultra-high frequency sensor; U2 represents the maximum amplitude of the signal received by the second standard ultra-high frequency sensor; and L represents the first preset distance.

[0063] In some embodiments, the calculation formula of the first electrical signal Y0(t) includes:

[0064]

[0065] Among them, τ represents the pulse width; A0 represents the pulse amplitude, A0=ηL s +λlnU c ; η is the attenuation of the UHF signal, in V / m; L s is the straight-line distance between the first standard UHF sensor and the sensor to be tested, in meters; λ is the dielectric loss coefficient of the GIS equipment; U c It is the voltage level of gas insulated switchgear, in kV.

[0066] In one implementation, the pulse width τ is 4 ns.

[0067] In one implementation, the dielectric loss coefficient λ of the GIS equipment is 0.8.

[0068] For example, taking the on-site calibration device of the partial discharge ultra-high frequency sensor applied to 550KV GIS equipment as an example, Uc is 550kV, η is 0.01V / m, Ls is 1m, then A0 is 5.06V.

[0069] In some embodiments, the first standard UHF sensor is a UHF sensor based on an Archimedean spiral antenna.

[0070] The material of the Archimedean spiral antenna can be copper.

[0071] In some embodiments, the calculation formula of the outer diameter D of the Archimedean spiral antenna includes:

[0072]

[0073] Where c is the speed of light; u is the Poisson's ratio of the material used in the antenna; f L is the lower limit operating frequency of the antenna, in Hz; μr The relative magnetic permeability of the material used for the antenna;

[0074] The calculation formula for the inner diameter 2r0 of the Archimedean spiral antenna includes:

[0075]

[0076] Among them, f H is the upper limit operating frequency of the antenna, in Hz;

[0077] The calculation formula for the number of spiral turns N of the Archimedean spiral antenna includes:

[0078]

[0079] Where η is the attenuation of the UHF signal, in V / m; U c It is the voltage level of gas insulated switchgear, in kV.

[0080] In some embodiments, the speed of light c is 3*10 8 m / s.

[0081] In one implementation, taking the Archimedean spiral antenna using copper as the material as an example, u is 0.34, μr is 1, fL is 700 MHz, fH is 3000 MHz, then D is 159 mm, 2r0 is 4.25 mm, and N is 23 turns.

[0082] Figure 2 A schematic diagram of a flow chart of a method for on-site calibration of a GIS partial discharge ultra-high frequency sensor provided in an embodiment of the present application. Figure 2 As shown, in some embodiments, the GIS partial discharge ultra-high frequency sensor on-site verification method includes the following steps:

[0083] S1, a partial discharge signal generator outputs a first electrical signal to a first standard UHF sensor.

[0084] The first electrical signal includes a signal emitted by a calibration pulse signal source with adjustable amplitude, which is confirmed based on pulse amplitude and pulse width, and the pulse amplitude is confirmed based on the attenuation of the ultra-high frequency signal.

[0085] The partial discharge signal generator is connected to the first standard UHF sensor through a coaxial cable.

[0086] In some embodiments, the calculation formula of the first electrical signal Y0(t) includes:

[0087]

[0088] Among them, τ represents the pulse width; A0 represents the pulse amplitude, A0=ηL s +λlnUc ; η is the attenuation of the UHF signal, in V / m; L s is the straight-line distance between the first standard UHF sensor and the sensor to be tested, in meters; λ is the dielectric loss coefficient of the GIS equipment; U c It is the voltage level of gas insulated switchgear, in kV.

[0089] S2, a first standard UHF sensor receives a first electrical signal, converts the first electrical signal into an electromagnetic wave signal, and transmits the electromagnetic wave signal to the UHF sensor to be tested.

[0090] The first standard UHF sensor is fixed on the outer wall of the pot insulator.

[0091] In some embodiments, the first standard UHF sensor is a UHF sensor based on an Archimedean spiral antenna.

[0092] In some embodiments, the calculation formula of the outer diameter D of the Archimedean spiral antenna includes:

[0093]

[0094] Where c is the speed of light; u is the Poisson's ratio of the material used in the antenna; f L is the lower limit operating frequency of the antenna, in Hz; μ r The relative magnetic permeability of the material used for the antenna;

[0095] The calculation formula for the inner diameter 2r0 of the Archimedean spiral antenna includes:

[0096]

[0097] Among them, f H is the upper limit operating frequency of the antenna, in Hz;

[0098] The calculation formula for the number of spiral turns N of the Archimedean spiral antenna includes:

[0099]

[0100] Where η is the attenuation of the UHF signal, in V / m; U c It is the voltage level of gas insulated switchgear, in kV.

[0101] S3, the UHF sensor to be tested receives the electromagnetic wave signal, converts the electromagnetic wave signal into a second electrical signal, and transmits the second electrical signal to the signal processing and analysis module.

[0102] The UHF sensor to be tested and the signal processing and analysis module are connected via a coaxial cable.

[0103] The signal processing and analysis module is used to analyze the second electrical signal to obtain an analysis result.

[0104] S4, the signal processing and analysis module sends the analysis results to the host computer to visualize the analysis results.

[0105] The host computer and the signal processing and analysis module are connected via a coaxial cable.

[0106] In some embodiments, the GIS partial discharge UHF sensor on-site verification method further includes:

[0107] S5, disposing a second standard UHF sensor on the outer wall of the pot-type insulator at a position which is a first preset distance away from the first standard UHF sensor.

[0108] The first standard UHF sensor and the second standard UHF sensor are both located on the central axis of the pot-type insulator.

[0109] The calculation formula for the attenuation of the UHF signal includes:

[0110]

[0111] Among them, U1 represents the maximum amplitude of the signal transmitted by the first standard ultra-high frequency sensor; U2 represents the maximum amplitude of the signal received by the second standard ultra-high frequency sensor; and L represents the first preset distance.

[0112] The on-site calibration method of the GIS partial discharge UHF sensor provided in the embodiment of the present application includes a partial discharge signal generator outputting a calibration pulse signal source with adjustable amplitude to a standard UHF sensor, the standard UHF sensor converting an electrical signal into an electromagnetic wave signal and transmitting it to the UHF sensor to be tested, the UHF sensor to be tested converting the received signal into an electrical signal and transmitting it to the signal processing and analysis module, and finally displaying the analysis result in the host computer, which can realize regular calibration of the UHF sensor, thereby ensuring the accuracy of the detection result. In addition, the UHF sensor to be tested on the GIS can be calibrated on site without disassembling it, which helps to improve the calibration efficiency of the UHF sensor and ensure the reliability of the sensor.

[0113] In addition, the calibration of UHF sensors can be carried out on site, shortening the sensor calibration cycle.

[0114] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0115] In addition, it is clear that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices stated in a device claim can also be implemented by one unit or device through software or hardware. The words first, second, etc. are used to indicate names, and do not indicate any particular order.

Claims

1. A method for on-site calibration of a GIS partial discharge ultra-high frequency sensor, characterized in that: include: The partial discharge signal generator outputs a first electrical signal to the first standard UHF sensor; The first electrical signal includes a signal emitted by a calibration pulse signal source with adjustable amplitude, which is confirmed according to pulse amplitude and pulse width, and the pulse amplitude is confirmed according to the attenuation of the UHF signal; the partial discharge signal generator is connected to the first standard UHF sensor via a coaxial cable; The first standard UHF sensor receives the first electrical signal, converts the first electrical signal into an electromagnetic wave signal, and transmits the electromagnetic wave signal to the UHF sensor to be tested; the first standard UHF sensor is fixed on the outer wall of the pot-type insulator; The UHF sensor to be tested receives the electromagnetic wave signal, converts the electromagnetic wave signal into a second electrical signal, and transmits the second electrical signal to a signal processing and analysis module; the UHF sensor to be tested and the signal processing and analysis module are connected via a coaxial cable; the signal processing and analysis module is used to analyze the second electrical signal to obtain an analysis result; The signal processing and analysis module sends the analysis result to a host computer to visualize the analysis result; the host computer and the signal processing and analysis module are connected via a coaxial cable.

2. The GIS partial discharge ultra-high frequency sensor on-site calibration method according to claim 1 is characterized in that: The GIS partial discharge ultra-high frequency sensor on-site verification method also includes: A second standard UHF sensor is arranged at an outer wall of the pot-type insulator and at a position at a first preset distance from the first standard UHF sensor; the first standard UHF sensor and the second standard UHF sensor are both located on the central axis of the pot-type insulator; Then the calculation formula of the UHF signal attenuation includes: Among them, U1 represents the maximum amplitude of the signal transmitted by the first standard ultra-high frequency sensor; U2 represents the maximum amplitude of the signal received by the second standard ultra-high frequency sensor; and L represents the first preset distance.

3. The GIS partial discharge ultra-high frequency sensor on-site calibration method according to claim 1 or 2, characterized in that: The calculation formula of the first electrical signal Y0(t) includes: Among them, τ represents the pulse width; A0 represents the pulse amplitude, A0=ηL s +λlnU c ; η is the attenuation of the UHF signal, in V / m; L s is the straight-line distance between the first standard UHF sensor and the sensor to be tested, in meters; λ is the dielectric loss coefficient of the GIS equipment; U c It is the voltage level of gas insulated switchgear, in kV.

4. The GIS partial discharge ultra-high frequency sensor on-site calibration method according to claim 1 or 2, characterized in that: The first standard UHF sensor adopts an UHF sensor based on an Archimedean spiral antenna.

5. The GIS partial discharge ultra-high frequency sensor on-site calibration method according to claim 4 is characterized in that: The calculation formula for the outer diameter D of the Archimedean spiral antenna includes: Where c is the speed of light; u is the Poisson's ratio of the material used in the antenna; f L is the lower limit operating frequency of the antenna, in Hz; μ r The relative magnetic permeability of the material used for the antenna; The calculation formula for the inner diameter 2r0 of the Archimedean spiral antenna includes: Among them, f H is the upper limit operating frequency of the antenna, in Hz; The calculation formula for the number of spiral turns N of the Archimedean spiral antenna includes: Where η is the attenuation of the UHF signal, in V / m; U c It is the voltage level of gas insulated switchgear, in kV.

6. A GIS partial discharge ultra-high frequency sensor on-site calibration device, characterized in that: include: Partial discharge signal generator, first standard UHF sensor, signal processing and analysis module and host computer; The partial discharge signal generator is used to output a first electrical signal to the first standard UHF sensor; the first electrical signal includes a signal emitted by a calibration pulse signal source with adjustable amplitude, confirmed according to pulse amplitude and pulse width; The pulse amplitude is determined according to the attenuation of the UHF signal; the partial discharge signal generator is connected to the first standard UHF sensor via a coaxial cable; The first standard UHF sensor is used to receive the first electrical signal, convert the first electrical signal into an electromagnetic wave signal, and transmit the electromagnetic wave signal to the UHF sensor to be tested; the first standard UHF sensor is fixed on the outer wall of the basin insulator; the UHF sensor to be tested receives the electromagnetic wave signal, converts the electromagnetic wave signal into a second electrical signal, and transmits the second electrical signal to the signal processing and analysis module; the UHF sensor to be tested and the signal processing and analysis module are connected via a coaxial cable; The signal processing and analysis module is used to analyze the second electrical signal to obtain an analysis result; The signal processing and analysis module is used to send the analysis result to the host computer to visually display the analysis result; The host computer and the signal processing and analysis module are connected via a coaxial cable.

7. The GIS partial discharge ultra-high frequency sensor on-site calibration device according to claim 6 is characterized in that: The GIS partial discharge UHF sensor on-site calibration device further comprises: a second standard UHF sensor; The second standard UHF sensor is arranged at the outer wall of the pot-type insulator, and the distance from the first standard UHF sensor is a first preset distance; the first standard UHF sensor and the second standard UHF sensor are both located on the central axis of the pot-type insulator; Then the calculation formula of the UHF signal attenuation includes: Among them, U1 represents the maximum amplitude of the signal transmitted by the first standard ultra-high frequency sensor; U2 represents the maximum amplitude of the signal received by the second standard ultra-high frequency sensor; and L represents the first preset distance.

8. The GIS partial discharge ultra-high frequency sensor on-site calibration device according to claim 6 or 7, characterized in that: The calculation formula of the first electrical signal Y0(t) includes: Among them, τ represents the pulse width; A0 represents the pulse amplitude, A0=ηL s +λlnU c ; η is the attenuation of the UHF signal, in V / m; L s is the straight-line distance between the first standard UHF sensor and the sensor to be tested, in meters; λ is the dielectric loss coefficient of the GIS equipment; U c It is the voltage level of gas insulated switchgear, in kV.

9. The GIS partial discharge ultra-high frequency sensor on-site calibration device according to claim 6 or 7, characterized in that: The first standard UHF sensor adopts an UHF sensor based on an Archimedean spiral antenna.

10. The GIS partial discharge ultra-high frequency sensor on-site calibration device according to claim 9, characterized in that: The calculation formula for the outer diameter D of the Archimedean spiral antenna includes: Where c is the speed of light; u is the Poisson's ratio of the material used in the antenna; f L is the lower limit operating frequency of the antenna, in Hz; μ r The relative magnetic permeability of the material used for the antenna; The calculation formula for the inner diameter 2r0 of the Archimedean spiral antenna includes: Among them, f H is the upper limit operating frequency of the antenna, in Hz; The calculation formula for the number of spiral turns N of the Archimedean spiral antenna includes: Where η is the attenuation of the UHF signal, in V / m; U c It is the voltage level of gas insulated switchgear, in kV.

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