A GIS single pulse sporadic partial discharge signal and interference signal identification method and system

Abstract

The application discloses a GIS single-pulse incidental partial discharge signal and interference signal identification method and system. The method comprises the following steps: collecting a first GIS single-pulse signal at a position where a first ultra-high frequency sensor is located in real time through the first ultra-high frequency sensor arranged in a GIS body; collecting a space signal at a position where a space ultra-high frequency sensor is located in real time through the space ultra-high frequency sensor arranged outside the GIS body, wherein the space ultra-high frequency sensor is arranged within a predetermined range of the first ultra-high frequency sensor; calculating a first maximum value of the first GIS single-pulse signal in a preset time period and a second maximum value of the space signal in the preset time period respectively; and comparing the first maximum value and the second maximum value in the preset time period to determine whether the first GIS single-pulse signal in the preset time period is a GIS partial discharge signal or an interference signal.

Description

Technical Field

[0001] This application relates to the field of GIS signal recognition technology, and in particular to a method and system for identifying GIS monopulse intermittent partial discharge signals and interference signals. Background Technology

[0002] Gas-insulated switchgear (GIS) is a critical piece of equipment in power systems. With the increasing scale of my country's power grid, GIS insulation discharge faults are becoming more frequent. To ensure the reliability of GIS operation, ultra-high frequency (UHF) live-line detection is commonly used to diagnose internal partial discharge defects and prevent equipment failure. However, UHF partial discharge signals from operating GIS in the field exhibit small-pulse, intermittent characteristics and are often submerged in external interference signals, making them difficult to identify. Currently, there is a lack of methods for identifying intermittent UHF partial discharge signals from GIS in the field. Summary of the Invention

[0003] To address the shortcomings of the prior art, this disclosure provides a method and system for identifying GIS monopulse intermittent partial discharge signals and interference signals.

[0004] According to one aspect of this application, a method for identifying GIS monopulse intermittent partial discharge signals and interference signals is provided, comprising:

[0005] The first ultra-high frequency sensor installed inside the GIS body collects the single pulse signal generated by the first GIS at the location of the first ultra-high frequency sensor in real time.

[0006] The spatial signals at the location of the UHF sensor are collected in real time by a UHF sensor set outside the GIS body, wherein the UHF sensor is set within a predetermined range of the first UHF sensor.

[0007] Calculate the first maximum value of the single pulse signal generated by the first GIS within a preset time period and the second maximum value of the spatial signal within the preset time period;

[0008] The first and second maximum values ​​within a preset time period are compared to determine whether the first GIS single-pulse signal within the preset time period is a GIS partial discharge signal or an interference signal.

[0009] Optionally, the operation of determining whether the first GIS-generated single-pulse signal within the preset time period is a GIS partial discharge signal or an interference signal by analyzing the first and second maximum values ​​within the preset time period includes:

[0010] If the first maximum value within a preset time period is greater than or equal to the second maximum value, the first GIS single pulse signal within the preset time period is determined to be the GIS partial discharge signal to be verified.

[0011] If the first maximum value within a preset time period is less than the second maximum value, the single pulse signal generated by the first GIS within the preset time period is determined to be an interference signal.

[0012] Optionally, after determining that the first GIS-generated single-pulse signal within the preset time period is the partial discharge signal of the GIS to be verified, the method further includes:

[0013] The second UHF sensor is used to collect a single pulse signal generated by the second GIS at the location of the second UHF sensor. The second UHF sensor is set on the side of the GIS body opposite to the first UHF sensor.

[0014] The single-pulse signal generated by the second GIS within a preset time period is used to verify the single-pulse signal generated by the first GIS within the preset time period, thereby determining whether there is a partial discharge signal in the GIS body within the preset time period.

[0015] Optionally, the average transmission loss between the first UHF sensor and the second UHF sensor in the range of 300MHz to 1500MHz is no greater than 70dB.

[0016] Optionally, the operation of verifying the single-pulse signal of the first GIS within a preset time period using the single-pulse signal generated by the second GIS within a preset time period, and determining whether a partial discharge signal exists within the GIS body within the preset time period, includes:

[0017] If, within a preset nanosecond range before and after the occurrence of the first GIS single-pulse signal, the second GIS single-pulse signal exists, then the first GIS single-pulse signal is determined to be a GIS partial discharge signal.

[0018] If, within a preset nanosecond range before and after the occurrence of the first GIS single-pulse signal, the second GIS single-pulse signal is not present, then the first GIS single-pulse signal is determined to be an interference signal.

[0019] According to another aspect of this application, a system for identifying single-pulse intermittent partial discharge signals and interference signals in a GIS is provided, comprising: a first UHF sensor disposed within the GIS body, a spatial UHF sensor disposed outside the GIS body, and a computing device, wherein...

[0020] The first ultra-high frequency sensor is used to collect the first single-pulse signal generated by the GIS within the GIS body;

[0021] Space UHF sensors are used to collect spatial signals from outside the GIS body;

[0022] The computing device is used to calculate the single-pulse signal generated by the first GIS and the spatial signal, and to determine whether the single-pulse signal generated by the first GIS is a GIS partial discharge signal or an interference signal.

[0023] Optionally, it also includes:

[0024] A second UHF sensor, located on the side opposite to the first UHF sensor within the GIS body, is used to collect the single-pulse signal generated by the second GIS within the GIS body and to verify the single-pulse signal generated by the first GIS.

[0025] Therefore, the on-site GIS multi-channel intermittent UHF partial discharge signal identification method provided in this application identifies GIS partial discharge signals by setting a first UHF sensor and a second UHF sensor inside the GIS body and setting an external spatial UHF sensor, and comparing the collected signals. It has advantages such as strong on-site operability, accurate judgment, and ease of implementation, and can be widely used in the identification of on-site GIS multi-channel intermittent UHF partial discharge signals. It solves the problem of significant interference and difficulty in identifying partial discharge in on-site GIS multi-channel intermittent UHF signals.

[0026] The above and other objects, advantages and features of this application will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this application in conjunction with the accompanying drawings. Attached Figure Description

[0027] The following sections will describe some specific embodiments of this application in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0028] Figure 1 This is a flowchart illustrating the method for identifying GIS monopulse intermittent partial discharge signals and interference signals according to the first aspect of the embodiments of this application.

[0029] Figure 2 This is a schematic diagram of a GIS monopulse intermittent partial discharge signal and interference signal identification system according to the first aspect of the embodiments of this application;

[0030] Figure 3 This is a schematic diagram of a partial discharge signal collected by a first ultra-high frequency sensor according to the first aspect of the embodiments of this application;

[0031] Figure 4 This is a schematic diagram of the interference signal collected by the first ultra-high frequency sensor according to the first aspect of the embodiments of this application;

[0032] Figure 5 This is a schematic diagram of a typical interference signal of T033B according to the first aspect of the embodiments of this application;

[0033] Figure 6 This is a schematic diagram of a typical partial discharge signal of T033B according to the first aspect of the embodiments of this application. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other. This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] To enable those skilled in the art to better understand the present disclosure, the technical solutions of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present disclosure, and not all embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present disclosure.

[0036] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0037] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0038] Figure 1 This is a flowchart illustrating the method for identifying GIS monopulse intermittent partial discharge signals and interference signals according to the first aspect of the embodiments of this application. (Reference) Figure 1 As shown, the method 100 for identifying GIS monopulse intermittent partial discharge signals and interference signals includes:

[0039] Step 101: The first UHF sensor installed inside the GIS body is used to collect the single pulse signal generated by the first GIS at the location of the first UHF sensor in real time.

[0040] Step 102: Real-time acquisition of spatial signals at the location of the UHF sensor by a spatial UHF sensor set outside the GIS body, wherein the spatial UHF sensor is set within a predetermined range of the first UHF sensor.

[0041] Step 103: Calculate the first maximum value of the single pulse signal generated by the first GIS within the preset time period and the second maximum value of the spatial signal within the preset time period.

[0042] Step 104: Compare the first maximum value and the second maximum value within the preset time period to determine whether the first GIS single pulse signal within the preset time period is a GIS partial discharge signal or an interference signal.

[0043] Optionally, the operation of determining whether the first GIS-generated single-pulse signal within the preset time period is a GIS partial discharge signal or an interference signal by analyzing the first and second maximum values ​​within the preset time period includes:

[0044] If the first maximum value within a preset time period is greater than or equal to the second maximum value, the first GIS single pulse signal within the preset time period is determined to be the GIS partial discharge signal to be verified.

[0045] If the first maximum value within a preset time period is less than the second maximum value, the single pulse signal generated by the first GIS within the preset time period is determined to be an interference signal.

[0046] Optionally, after determining that the first GIS-generated single-pulse signal within the preset time period is the partial discharge signal of the GIS to be verified, the method further includes:

[0047] The second UHF sensor is used to collect a single pulse signal generated by the second GIS at the location of the second UHF sensor. The second UHF sensor is set on the side of the GIS body opposite to the first UHF sensor.

[0048] The single-pulse signal generated by the second GIS within a preset time period is used to verify the single-pulse signal generated by the first GIS within the preset time period, thereby determining whether there is a partial discharge signal in the GIS body within the preset time period.

[0049] Optionally, the average transmission loss between the first UHF sensor and the second UHF sensor in the range of 300MHz to 1500MHz is no greater than 70dB.

[0050] Optionally, the operation of verifying the single-pulse signal of the first GIS within a preset time period using the single-pulse signal generated by the second GIS within a preset time period, and determining whether a partial discharge signal exists within the GIS body within the preset time period, includes:

[0051] If, within a preset nanosecond range before and after the occurrence of the first GIS single-pulse signal, the second GIS single-pulse signal exists, then the first GIS single-pulse signal is determined to be a GIS partial discharge signal.

[0052] If, within a preset nanosecond range before and after the occurrence of the first GIS single-pulse signal, the second GIS single-pulse signal is not present, then the first GIS single-pulse signal is determined to be an interference signal.

[0053] The preset nanosecond range is within the range of L / 0.3 nanoseconds, where L is the distance between the second UHF sensor and the first UHF sensor.

[0054] Specifically, refer to Figure 2 As shown, this invention aims to identify intermittent UHF partial discharge (IP) signals and interference signals in multi-channel GIS (Gas-Insulated Site). First, this invention specifies a method for identifying intermittent UHF IHF signals and interference signals in multi-channel GIS. Measuring IHF signals in GIS requires measuring at least three UHF channels, including two built-in UHF signals and one external UHF signal. The built-in UHF sensor is used to measure the IHF signal inside the GIS. Then, an external spatial UHF sensor is placed near the built-in UHF sensor. IHF signal identification is performed by comparing the amplitude values ​​of the multiple UHF sensors. The specific identification method is as follows:

[0055] (1) Criteria for identifying partial discharge signals inside the GIS: The first UHF sensor 1 detects the UHF partial discharge signal inside the GIS, and the spatial UHF sensor 2 measures the spatial signal, i.e., the on-site interference signal (see Figure 2 When partial discharge occurs in the internal partial discharge source of the GIS, the signal characteristics of each UHF sensor are as follows: the first UHF sensor 1 receives the strongest internal partial discharge signal, while the signal strength received by the spatial UHF sensor 2 is less than that of the built-in UHF sensor (see...). Figure 3 ), where a is the single pulse signal generated by the second GIS, b is the single pulse signal generated by the first GIS, and c is the spatial signal;

[0056] (2) Criteria for determining external interference signals in the GIS: If the amplitude of the signal received by the space UHF sensor 2 is greater than the amplitude of the single-pulse signal generated by the first GIS measured by the first UHF sensor 1, then this signal is an external interference signal (see...). Figure 4 ), where a is the single pulse signal generated by the second GIS, b is the single pulse signal generated by the first GIS, and c is the spatial signal.

[0057] In summary, interference and partial discharge signals can be identified by comparing the amplitude of multi-channel spatial signals and built-in ultra-high frequency signals.

[0058] The steps for identifying intermittent partial discharge signals in multi-channel ultra-high frequency networks are as follows:

[0059] (1) If the original time-domain signal of the single pulse signal generated by the first UHF sensor 1 is M1, and the original time-domain signal of the spatial signal is M2, the original time-domain signal of the spatial signal is M2;

[0060] (2) Then calculate the maximum values ​​of signal M1 and signal M2 respectively as max(M1) and max(M2).

[0061] (3) If max(M1) is greater than or equal to max(M2), then the single pulse signal generated by the first GIS is a partial discharge signal. If max(M1) is less than max(M2), then the single pulse signal generated by the first GIS is an interference signal.

[0062] (4) When the presence of partial discharge is detected by comparing the first UHF sensor 1 and the external space UHF sensor 2, it is further confirmed by the built-in second UHF sensor 3. The average transmission loss of the signal between the first UHF sensor 1 and the second UHF sensor 3 in the range of 300MHz to 1500MHz is no greater than 70dB. If the distance between the first UHF sensor 1 and the second UHF sensor 3 is L, then if the second UHF sensor 3 has a second GIS single pulse signal within the range of L / 0.3 nanoseconds before and after the first UHF sensor 1 receives the first GIS single pulse signal, then it is confirmed that there is a partial discharge signal inside the GIS.

[0063] Furthermore, this invention requires at least three channels of ultra-high frequency signals to be measured, or multiple second ultra-high frequency sensors can be set up to collect the reference second GIS single pulse signal within the GIS body to verify the first GIS single pulse signal.

[0064] Furthermore, since July 2021, the online monitoring sensor (G14B phase) for partial discharge on phase B of the 1000 kV T033 switch at the Wuhu UHV substation has emitted an alarm signal, indicating insulation-related partial discharge. An expert team analyzed the test results from State Grid Anhui Electric Power's maintenance and professional personnel, preliminarily confirming the presence of insulation-related partial discharge in the switch chamber of phase TO33B. They also found that the signal exhibits strong intermittent characteristics, with the daily maximum number of partial discharge events increasing by more than 30%, necessitating 12-hour comprehensive monitoring.

[0065] The flexible equipment expert team conducted comprehensive monitoring of the TO33B phase switch. During the 12-hour monitoring period, a total of 3,000 sets of UHF signals were collected. Using the multi-channel UHF intermittent partial discharge identification method of this invention, 573 internal partial discharge signals of the GIS were identified. Figure 5 This is a schematic diagram of a typical interference signal that has been identified. Figure 6 The diagram shows the original partial discharge signal that was identified. In the diagram, a and b are the second GIS single-pulse signals collected by the second UHF sensor that generates the first single-pulse signal and is installed in the GIS body. c is the first GIS single-pulse signal and d is the spatial signal.

[0066] Furthermore, a schematic diagram of a GIS monopulse intermittent partial discharge signal and interference signal identification system according to the second aspect of the embodiments of this application is provided. (See reference) Figure 2 As shown, the system for identifying GIS single-pulse intermittent partial discharge signals and interference signals includes: a first UHF sensor 1 installed inside the GIS body, a spatial UHF sensor 2 installed outside the GIS body, and a computing device.

[0067] The first ultra-high frequency sensor 1 is used to collect the first single-pulse signal generated by the GIS within the GIS body;

[0068] Space UHF sensor 2 is used to collect spatial signals from outside the GIS body;

[0069] The computing device is used to calculate the single-pulse signal generated by the first GIS and the spatial signal, and to determine whether the single-pulse signal generated by the first GIS is a GIS partial discharge signal or an interference signal.

[0070] Optionally, it also includes:

[0071] The second UHF sensor 3, located on the side opposite to the first UHF sensor within the GIS body, is used to collect the single-pulse signal generated by the second GIS within the GIS body and to verify the single-pulse signal generated by the first GIS.

[0072] Optionally, the computing device is used to calculate the first GIS-generated single-pulse signal and spatial signals, and to determine whether the first GIS-generated single-pulse signal is a GIS partial discharge signal or an interference signal, including:

[0073] Calculate the first maximum value of the single pulse signal generated by the first GIS within a preset time period and the second maximum value of the spatial signal within the preset time period;

[0074] The first and second maximum values ​​within a preset time period are compared to determine whether the first GIS single-pulse signal within the preset time period is a GIS partial discharge signal or an interference signal.

[0075] Optionally, the operation of determining whether the first GIS-generated single-pulse signal within the preset time period is a GIS partial discharge signal or an interference signal by analyzing the first and second maximum values ​​within the preset time period includes:

[0076] If the first maximum value within a preset time period is greater than or equal to the second maximum value, the first GIS single pulse signal within the preset time period is determined to be the GIS partial discharge signal to be verified.

[0077] If the first maximum value within a preset time period is less than the second maximum value, the single pulse signal generated by the first GIS within the preset time period is determined to be an interference signal.

[0078] Optionally, after determining that the first GIS-generated single-pulse signal within the preset time period is the partial discharge signal of the GIS to be verified, the method further includes:

[0079] The second UHF sensor is used to collect a single pulse signal generated by the second GIS at the location of the second UHF sensor. The second UHF sensor is set on the side of the GIS body opposite to the first UHF sensor.

[0080] The single-pulse signal generated by the second GIS within a preset time period is used to verify the single-pulse signal generated by the first GIS within the preset time period, thereby determining whether there is a partial discharge signal in the GIS body within the preset time period.

[0081] Optionally, the average transmission loss between the first UHF sensor and the second UHF sensor in the range of 300MHz to 1500MHz is no greater than 70dB.

[0082] Optionally, the operation of verifying the single-pulse signal of the first GIS within a preset time period using the single-pulse signal generated by the second GIS within a preset time period, and determining whether a partial discharge signal exists within the GIS body within the preset time period, includes:

[0083] If, within a preset nanosecond range before and after the occurrence of the first GIS single-pulse signal, the second GIS single-pulse signal exists, then the first GIS single-pulse signal is determined to be a GIS partial discharge signal.

[0084] If, within a preset nanosecond range before and after the occurrence of the first GIS single-pulse signal, the second GIS single-pulse signal is not present, then the first GIS single-pulse signal is determined to be an interference signal.

[0085] The preset nanosecond range is within the range of L / 0.3 nanoseconds, where L is the distance between the second UHF sensor and the first UHF sensor.

[0086] Therefore, the method for identifying intermittent UHF partial discharge signals in multi-channel GIS provided in this application has the advantages of strong on-site operability, accurate judgment, and ease of implementation, and can be widely used in the judgment of intermittent UHF partial discharge signals in multi-channel GIS. It solves the problem of significant interference and difficulty in identifying partial discharge in multi-channel intermittent UHF signals in on-site GIS.

[0087] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this disclosure. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0088] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0089] In the description of this disclosure, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this disclosure and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this disclosure; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0090] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for identifying GIS monopulse intermittent partial discharge signals and interference signals, characterized in that, include: The first ultra-high frequency sensor installed inside the GIS body collects the single pulse signal generated by the first GIS at the location of the first ultra-high frequency sensor in real time. The spatial signal at the location of the UHF sensor is collected in real time by a spatial UHF sensor set outside the GIS body, wherein the spatial UHF sensor is set within a predetermined range of the first UHF sensor. Calculate the first maximum value of the single pulse signal generated by the first GIS within a preset time period and the second maximum value of the spatial signal within the preset time period; Compare the first maximum value and the second maximum value within the preset time period to determine whether the first GIS single pulse signal within the preset time period is a GIS partial discharge signal or an interference signal. The operation of determining whether the first GIS-generated single-pulse signal within the preset time period is a GIS partial discharge signal or an interference signal by combining the first maximum value and the second maximum value within the preset time period includes: If the first maximum value within the preset time period is greater than or equal to the second maximum value, the first GIS single-pulse signal within the preset time period is determined to be the GIS partial discharge signal to be verified. If the first maximum value within the preset time period is less than the second maximum value, the first GIS single pulse signal within the preset time period is determined to be the interference signal; After determining that the single-pulse signal generated by the first GIS within the preset time period is the partial discharge signal of the GIS to be verified, the method further includes: The second UHF sensor is used to collect a single pulse signal generated by the second GIS at the location of the second UHF sensor. The second UHF sensor is located on the side of the GIS body opposite to the first UHF sensor. The first GIS single-pulse signal within the preset time period is verified by the second GIS single-pulse signal within the preset time period to determine whether the GIS partial discharge signal exists within the GIS body within the preset time period. The operation of verifying the single-pulse signal generated by the first GIS within the preset time period using the single-pulse signal generated by the second GIS within the preset time period, and determining whether the GIS partial discharge signal exists within the GIS body within the preset time period, includes: If, within a preset time range before and after the occurrence of the first GIS single-pulse signal, the second GIS single-pulse signal exists, then the first GIS single-pulse signal is determined to be the GIS partial discharge signal. If, within the preset time range before and after the occurrence of the first GIS single-pulse signal, the second GIS single-pulse signal is not present, then the first GIS single-pulse signal is determined to be the interference signal.

2. The method according to claim 1, characterized in that, The average transmission loss between the first UHF sensor and the second UHF sensor in the range of 300MHz to 1500MHz is no greater than 70dB.

3. A system for identifying GIS monopulse intermittent partial discharge signals and interference signals, used to implement the method described in claim 1, characterized in that, include: The system includes a first UHF sensor installed inside the GIS body, a spatial UHF sensor installed outside the GIS body, and a computing device. The first ultra-high frequency sensor is used to collect the first GIS-generated single-pulse signal within the GIS body; The space ultra-high frequency sensor is used to collect spatial signals from outside the GIS body; The computing device is used to calculate the first GIS-generated single-pulse signal and the spatial signal to determine whether the first GIS-generated single-pulse signal is a GIS partial discharge signal or an interference signal.

4. The system according to claim 3, characterized in that, The average transmission loss between the first UHF sensor and the second UHF sensor in the range of 300MHz to 1500MHz is no greater than 70dB.

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