CN116298713A - GIS single pulse sporadic partial discharge signal and interference signal identification method and system - Google Patents
GIS single pulse sporadic partial discharge signal and interference signal identification method and system Download PDFInfo
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Abstract
The application discloses a GIS single pulse sporadic partial discharge signal and interference signal identification method and system. The method comprises the following steps: acquiring a first GIS generation monopulse signal at the position of a first ultrahigh frequency sensor in real time through the first ultrahigh frequency sensor arranged in the GIS body; acquiring a space signal of a position where the space ultrahigh frequency sensor is located in real time through the space ultrahigh frequency sensor arranged outside the GIS body, wherein the space ultrahigh frequency sensor is arranged in a preset range of the first ultrahigh frequency sensor; respectively calculating a first maximum value of a single pulse signal generated by a first GIS in a preset time period and a second maximum value of a space signal in the preset time period; comparing the first maximum value and the second maximum value in a preset time period, and determining that the first GIS single pulse signal in the preset time period is a GIS partial discharge signal or an interference signal.
Description
Technical Field
The application relates to the technical field of GIS signal identification, in particular to a method and a system for identifying GIS single pulse accidental partial discharge signals and interference signals.
Background
The gas-insulated switchgear (GasInsulatedSwitchgear, GIS) is a key device of a power system, and as the power grid scale of China increases, GIS insulation discharge faults frequently occur, so that the GIS operation reliability is guaranteed, whether partial discharge defects exist in the GIS or not is generally detected and diagnosed by adopting ultra-high frequency (UltraHighFrequency, UHF) in an electrified mode, and equipment faults are avoided. The on-site operation GIS ultrahigh frequency partial discharge signal presents small pulse and few pulse sporadic characteristics, is often submerged in the GIS external interference signal, is difficult to identify, and is not yet available at present.
Disclosure of Invention
Aiming at the defects in the prior art, the present disclosure provides a method and a system for identifying a GIS single pulse accidental partial discharge signal and an interference signal.
According to one aspect of the application, a method for identifying a GIS single pulse accidental partial discharge signal and an interference signal is provided, which comprises the following steps:
acquiring a first GIS generation monopulse signal at the position of a first ultrahigh frequency sensor in real time through the first ultrahigh frequency sensor arranged in the GIS body;
acquiring a space signal of a position where the space ultrahigh frequency sensor is located in real time through the space ultrahigh frequency sensor arranged outside the GIS body, wherein the space ultrahigh frequency sensor is arranged in a preset range of the first ultrahigh frequency sensor;
respectively calculating a first maximum value of a single pulse signal generated by a first GIS in a preset time period and a second maximum value of a space signal in the preset time period;
comparing the first maximum value and the second maximum value in a preset time period, and determining that the first GIS single pulse signal in the preset time period is a GIS partial discharge signal or an interference signal.
Optionally, the operation of determining that the first GIS single pulse signal generated in the preset time period is a GIS partial discharge signal or an interference signal includes:
judging that the first GIS generation monopulse signal in the preset time period is a GIS partial discharge signal to be verified under the condition that the first maximum value in the preset time period is larger than or equal to the second maximum value;
and under the condition that the first maximum value in the preset time period is smaller than the second maximum value, judging that the first GIS single pulse signal in the preset time period is an interference signal.
Optionally, after determining that the first GIS single pulse signal in the preset time period is the GIS partial discharge signal to be verified, the method further includes:
acquiring a second GIS generation single pulse signal at the position of a second ultrahigh frequency sensor through a preset second ultrahigh frequency sensor, wherein the second ultrahigh frequency sensor is arranged at one side of the GIS body opposite to the first ultrahigh frequency sensor;
and checking the first GIS generation single pulse signal in the preset time period through the second GIS generation single pulse signal in the preset time period, and judging whether a GIS partial discharge signal exists in the GIS body in the preset time period.
Optionally, the average transmission loss of the signal between the first uhf sensor and the second uhf sensor at 300MHz to 1500MHz is not more than 70dB.
Optionally, the verifying the first GIS generated single pulse signal in the preset time period by the second GIS generated single pulse signal in the preset time period, and determining whether the GIS partial discharge signal exists in the GIS body in the preset time period includes:
judging that the first GIS single pulse signal is a GIS partial discharge signal under the condition that the second GIS single pulse signal exists within a preset nanosecond range before and after the generation of the first GIS single pulse signal;
and judging the first GIS generation single pulse signal as an interference signal under the condition that the second GIS generation single pulse signal does not exist within a preset nanosecond range before and after the generation of the first GIS generation single pulse signal.
According to another aspect of the present application, there is provided a system for identifying GIS single pulse sporadic partial discharge signals and interference signals, including: first ultrahigh frequency sensor arranged in GIS body, space ultrahigh frequency sensor arranged outside GIS body and computing equipment, wherein
The first ultrahigh frequency sensor is used for collecting monopulse signals generated by a first GIS in the GIS body;
the spatial ultrahigh frequency sensor is used for collecting spatial signals outside the GIS body;
the computing equipment is used for computing the first GIS generation single pulse signal and the space signal and determining that the first GIS generation single pulse signal is a GIS partial discharge signal or an interference signal.
Optionally, the method further comprises:
and the second ultrahigh frequency sensor is arranged on one side of the GIS body opposite to the first ultrahigh frequency sensor and is used for collecting the monopulse signals generated by the second GIS in the GIS body and checking the monopulse signals generated by the first GIS.
Therefore, according to the on-site GIS multichannel sporadic ultrahigh frequency partial discharge signal identification method, the first ultrahigh frequency sensor, the second ultrahigh frequency sensor and the space ultrahigh frequency sensor are arranged in the GIS body, and the identification of the GIS partial discharge signal is realized by comparing the acquired signals. The method has the advantages of strong site operability, accurate judgment, easiness in implementation and the like, and can be widely applied to the judgment of the site GIS multichannel sporadic ultrahigh frequency partial discharge signals. The problem that the local GIS multichannel sporadic ultrahigh frequency signal is greatly interfered and difficult to identify is solved.
The above, as well as additional objectives, advantages, and features of the present application will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present application when read in conjunction with the accompanying drawings.
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Some specific embodiments of the present application will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:
fig. 1 is a flow chart of a method for identifying GIS single pulse sporadic partial discharge signals and interference signals according to a first aspect of an embodiment of the present application;
FIG. 2 is a schematic diagram of a GIS single pulse sporadic partial discharge signal and interference signal identification system according to the first aspect of the embodiments of the present application;
FIG. 3 is a schematic diagram of a partial discharge signal acquired by a first UHF sensor according to a first aspect of an embodiment of the present application;
FIG. 4 is a schematic diagram of an interference signal acquired by a first UHF sensor according to a first aspect of an embodiment of the present application;
FIG. 5 is a schematic diagram of a T033B exemplary interference signal according to a first aspect of an embodiment of the present application;
fig. 6 is a schematic diagram of a T033B typical partial discharge signal according to the first aspect of the embodiment of the present application.
Detailed Description
It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order that those skilled in the art will better understand the present disclosure, a technical solution in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present disclosure, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure, shall fall within the scope of the present disclosure.
It should be noted that the terms "first," "second," and the like in the description and claims of the present disclosure and in the foregoing figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the disclosure described herein are, for example, capable of operation in connection with other embodiments. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
Fig. 1 is a flow chart of a method for identifying GIS single pulse sporadic partial discharge signals and interference signals according to a first aspect of an embodiment of the present application. Referring to fig. 1, a method 100 for identifying GIS single pulse sporadic partial discharge signals and interference signals includes:
102, acquiring a spatial signal of a position where a spatial ultrahigh frequency sensor is located in real time through the spatial ultrahigh frequency sensor arranged outside the GIS body, wherein the spatial ultrahigh frequency sensor is arranged in a preset range of a first ultrahigh frequency sensor;
and 104, comparing the first maximum value and the second maximum value in a preset time period, and determining that the first GIS single pulse signal in the preset time period is a GIS partial discharge signal or an interference signal.
Optionally, the operation of determining that the first GIS single pulse signal generated in the preset time period is a GIS partial discharge signal or an interference signal includes:
judging that the first GIS generation monopulse signal in the preset time period is a GIS partial discharge signal to be verified under the condition that the first maximum value in the preset time period is larger than or equal to the second maximum value;
and under the condition that the first maximum value in the preset time period is smaller than the second maximum value, judging that the first GIS single pulse signal in the preset time period is an interference signal.
Optionally, after determining that the first GIS single pulse signal in the preset time period is the GIS partial discharge signal to be verified, the method further includes:
acquiring a second GIS generation single pulse signal at the position of a second ultrahigh frequency sensor through a preset second ultrahigh frequency sensor, wherein the second ultrahigh frequency sensor is arranged at one side of the GIS body opposite to the first ultrahigh frequency sensor;
and checking the first GIS generation single pulse signal in the preset time period through the second GIS generation single pulse signal in the preset time period, and judging whether a GIS partial discharge signal exists in the GIS body in the preset time period.
Optionally, the average transmission loss of the signal between the first uhf sensor and the second uhf sensor at 300MHz to 1500MHz is not more than 70dB.
Optionally, the verifying the first GIS generated single pulse signal in the preset time period by the second GIS generated single pulse signal in the preset time period, and determining whether the GIS partial discharge signal exists in the GIS body in the preset time period includes:
judging that the first GIS single pulse signal is a GIS partial discharge signal under the condition that the second GIS single pulse signal exists within a preset nanosecond range before and after the generation of the first GIS single pulse signal;
and judging the first GIS generation single pulse signal as an interference signal under the condition that the second GIS generation single pulse signal does not exist within a preset nanosecond range before and after the generation of the first GIS generation single pulse signal.
The preset nanosecond range is L/0.3 nanosecond range, wherein L is the distance between the second ultrahigh frequency sensor and the first ultrahigh frequency sensor.
Specifically, referring to fig. 2, the present invention is to determine a field GIS multichannel sporadic ultrahigh frequency partial discharge signal and an interference signal. Firstly, the invention provides a field GIS multichannel sporadic ultrahigh frequency partial discharge signal and interference signal identification method. The field GIS partial discharge signal measurement at least needs to measure three channels of ultrahigh frequency signals, wherein the three channels of ultrahigh frequency signals comprise two built-in ultrahigh frequency signals and one external ultrahigh frequency signal. The built-in ultrahigh frequency sensor is used for measuring the partial discharge signal in the GIS, then an external space ultrahigh frequency sensor is arranged near the built-in ultrahigh frequency sensor, and partial discharge signal identification is carried out by comparing the amplitude values of the multichannel ultrahigh frequency sensor, wherein the specific identification method is as follows:
(1) In-situ GIS internal partial discharge signal identification criterion: the first ultrahigh frequency sensor 1 detects the internal ultrahigh frequency partial discharge signal of the GIS, the spatial ultrahigh frequency sensor 2 measures the spatial signal, namely the field interference signal (see figure 2), when the internal partial discharge source of the GIS generates partial discharge, the signal characteristics of each ultrahigh frequency sensor are as follows: the intensity of the internal partial discharge signal received by the first ultrahigh frequency sensor 1 is the largest, and the intensity of the signal received by the spatial ultrahigh frequency sensor 2 is smaller than that of the built-in ultrahigh frequency sensor (see fig. 3), wherein a is a single pulse signal generated by the second GIS, b is a single pulse signal generated by the first GIS, and c is a spatial signal;
(2) On-site GIS external interference signal criterion: if the amplitude of the signal received by the spatial ultrahigh frequency sensor 2 is greater than the amplitude of the single pulse signal generated by the first GIS measured by the first ultrahigh frequency sensor 1, the signal is an external interference signal (see fig. 4), where a is a single pulse signal generated by the second GIS, b is a single pulse signal generated by the first GIS, and c is a spatial signal.
In conclusion, the interference and partial discharge signals are judged by comparing the amplitude of the multichannel space and the amplitude of the built-in ultrahigh frequency signal.
The multi-channel ultrahigh frequency occasional partial discharge signal identification method comprises the following steps:
(1) If the first ultrahigh frequency sensor 1 detects that the first GIS single pulse signal time domain original signal is M1, the external space ultrahigh frequency sensor 2 detects that the space signal time domain original signal is M2;
(2) Then, the maximum values of the signal M1 and the signal M2 are respectively calculated as max (M1) and max (M2).
(3) If max (M1) is greater than or equal to max (M2), the first GIS generates a single pulse signal as a partial discharge signal at the moment, and if max (M1) is less than max (M2), the first GIS generates a single pulse signal as an interference signal at the moment.
(4) After the internal partial discharge is detected by comparing the first ultrahigh frequency sensor 1 with the external space ultrahigh frequency sensor 2, the internal partial discharge is further confirmed by the internal second ultrahigh frequency sensor 3, the average transmission loss of signals between the first ultrahigh frequency sensor 1 and the second ultrahigh frequency sensor 3 is not more than 70dB from 300MHz to 1500MHz, if the distance between the first ultrahigh frequency sensor 1 and the second ultrahigh frequency sensor 3 is L, the partial discharge signal is confirmed when the second ultrahigh frequency sensor 3 receives the single pulse signal of the first GIS within the range of L/0.3 nanoseconds before and after the first ultrahigh frequency sensor 1 receives the single pulse signal of the first GIS, and the second ultrahigh frequency sensor 3 receives the single pulse signal of the second GIS.
In addition, the invention at least needs to measure three channels of ultrahigh frequency signals, and a plurality of second ultrahigh frequency sensors can be arranged to collect the second GIS monopulse signals in the GIS body for checking the first GIS monopulse signals.
In addition, since 7 months in 2021, an alarm signal appears on a 1000 kilovolt T033 switch B phase partial discharge on-line monitoring sensor (G14B phase) of the ultra-high voltage turnip station, and the signal type is insulation type partial discharge. The expert team analyzes the detection results of the national network Anhui power operation and maintenance personnel and professionals, preliminarily confirms that the TO33B phase switching air chamber has insulation partial discharge, and finds that the signal presents stronger gap performance, the number of times of daily maximum partial discharge events is increased by more than 30%, and the comprehensive monitoring needs TO be carried out for 12 hours.
In the comprehensive monitoring of TO33B phase switches for 12 hours, 3000 groups of ultrahigh frequency signals are collected altogether, 573 GIS internal partial discharge signals are identified altogether by adopting the multichannel ultrahigh frequency sporadic partial discharge identification method, fig. 5 is a schematic diagram of identified typical interference signals, fig. 6 is a schematic diagram of identified partial discharge original signals, wherein a and B are second GIS generation monopulse signals collected by a second ultrahigh frequency sensor of a first generation monopulse signal arranged in a GIS body, c is the first GIS generation monopulse signal, and d is a space signal.
In addition, the GIS single pulse accidental partial discharge signal and interference signal identification system according to the second aspect of the embodiment of the application is shown in the schematic diagram. Referring to fig. 2, the system for identifying GIS single pulse sporadic partial discharge signals and interference signals includes: first ultrahigh frequency sensor 1 arranged in GIS body, space ultrahigh frequency sensor 2 arranged outside GIS body and computing equipment, wherein
The first ultrahigh frequency sensor 1 is used for collecting monopulse signals generated by a first GIS in the GIS body;
the spatial ultrahigh frequency sensor 2 is used for collecting spatial signals outside the GIS body;
the computing equipment is used for computing the first GIS generation single pulse signal and the space signal and determining that the first GIS generation single pulse signal is a GIS partial discharge signal or an interference signal.
Optionally, the method further comprises:
and the second ultrahigh frequency sensor 3 is arranged on one side of the GIS body opposite to the first ultrahigh frequency sensor and is used for collecting the monopulse signals generated by the second GIS in the GIS body and checking the monopulse signals generated by the first GIS.
Optionally, the computing device is configured to calculate the first GIS generated single pulse signal and the spatial signal, and determine that the first GIS generated single pulse signal is a GIS partial discharge signal or an interference signal, and includes:
respectively calculating a first maximum value of a single pulse signal generated by a first GIS in a preset time period and a second maximum value of a space signal in the preset time period;
comparing the first maximum value and the second maximum value in a preset time period, and determining that the first GIS single pulse signal in the preset time period is a GIS partial discharge signal or an interference signal.
Optionally, the operation of determining that the first GIS single pulse signal generated in the preset time period is a GIS partial discharge signal or an interference signal includes:
judging that the first GIS generation monopulse signal in the preset time period is a GIS partial discharge signal to be verified under the condition that the first maximum value in the preset time period is larger than or equal to the second maximum value;
and under the condition that the first maximum value in the preset time period is smaller than the second maximum value, judging that the first GIS single pulse signal in the preset time period is an interference signal.
Optionally, after determining that the first GIS single pulse signal in the preset time period is the GIS partial discharge signal to be verified, the method further includes:
acquiring a second GIS generation single pulse signal at the position of a second ultrahigh frequency sensor through a preset second ultrahigh frequency sensor, wherein the second ultrahigh frequency sensor is arranged at one side of the GIS body opposite to the first ultrahigh frequency sensor;
and checking the first GIS generation single pulse signal in the preset time period through the second GIS generation single pulse signal in the preset time period, and judging whether a GIS partial discharge signal exists in the GIS body in the preset time period.
Optionally, the average transmission loss of the signal between the first uhf sensor and the second uhf sensor at 300MHz to 1500MHz is not more than 70dB.
Optionally, the verifying the first GIS generated single pulse signal in the preset time period by the second GIS generated single pulse signal in the preset time period, and determining whether the GIS partial discharge signal exists in the GIS body in the preset time period includes:
judging that the first GIS single pulse signal is a GIS partial discharge signal under the condition that the second GIS single pulse signal exists within a preset nanosecond range before and after the generation of the first GIS single pulse signal;
and judging the first GIS generation single pulse signal as an interference signal under the condition that the second GIS generation single pulse signal does not exist within a preset nanosecond range before and after the generation of the first GIS generation single pulse signal.
The preset nanosecond range is L/0.3 nanosecond range, wherein L is the distance between the second ultrahigh frequency sensor and the first ultrahigh frequency sensor.
Therefore, the field GIS multichannel sporadic ultrahigh frequency partial discharge signal identification method provided by the application has the advantages of strong field operability, accurate judgment, easiness in implementation and the like, and can be widely applied to judgment of field GIS multichannel sporadic ultrahigh frequency partial discharge signals. The problem that the local GIS multichannel sporadic ultrahigh frequency signal is greatly interfered and difficult to identify is solved.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In the description of the present disclosure, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present disclosure and to simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be configured and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present disclosure; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
The foregoing is merely a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. The method for identifying the GIS single pulse accidental partial discharge signal and the interference signal is characterized by comprising the following steps:
acquiring a first GIS generation monopulse signal at the position of a first ultrahigh frequency sensor in real time through the first ultrahigh frequency sensor arranged in the GIS body;
acquiring a space signal of a position where the space ultrahigh frequency sensor is located in real time through the space ultrahigh frequency sensor arranged outside the GIS body, wherein the space ultrahigh frequency sensor is arranged in a preset range of the first ultrahigh frequency sensor;
respectively calculating a first maximum value of the first GIS generation monopulse signal in a preset time period and a second maximum value of the space signal in the preset time period;
comparing the first maximum value and the second maximum value in the preset time period, and determining that the first GIS single pulse signal in the preset time period is a GIS partial discharge signal or an interference signal.
2. The method of claim 1, wherein the operation of determining that the first GIS single pulse signal within the preset time period is a GIS partial discharge signal or an interference signal by performing the first maximum value and the second maximum value within the preset time period comprises:
judging that the first GIS generation single pulse signal in the preset time period is the GIS partial discharge signal to be verified under the condition that the first maximum value in the preset time period is larger than or equal to the second maximum value;
and under the condition that the first maximum value in the preset time period is smaller than the second maximum value, judging that the first GIS single pulse signal in the preset time period is the interference signal.
3. The method according to claim 2, further comprising, after the operation of determining that the first GIS occurrence single pulse signal within the preset period of time is the GIS partial discharge signal to be verified:
acquiring a second GIS generation monopulse signal at the position of a second ultrahigh frequency sensor through a preset second ultrahigh frequency sensor, wherein the second ultrahigh frequency sensor is arranged at one side, opposite to the first ultrahigh frequency sensor, of the GIS body;
and checking the first GIS generation single pulse signal in the preset time period through the second GIS generation single pulse signal in the preset time period, and judging whether the GIS partial discharge signal exists in the GIS body in the preset time period.
4. A method according to claim 3, wherein the average transmission loss of the signal between the first uhf sensor and the second uhf sensor is no more than 70dB at 300MHz to 1500 MHz.
5. The method of claim 3, wherein verifying the first GIS generated single pulse signal for the preset time period by the second GIS generated single pulse signal for the preset time period, determining whether the GIS partial discharge signal exists in the GIS body for the preset time period, comprises:
judging that the first GIS generation single pulse signal is the GIS partial discharge signal under the condition that the second GIS generation single pulse signal exists within a preset time range before and after the generation of the first GIS generation single pulse signal;
and judging the first GIS generation single pulse signal as the interference signal under the condition that the second GIS generation single pulse signal does not exist in the preset time ranges before and after the generation of the first GIS generation single pulse signal.
6. A GIS single pulse sporadic partial discharge signal and interference signal identification system, comprising: first ultrahigh frequency sensor arranged in GIS body, space ultrahigh frequency sensor arranged outside GIS body and computing equipment, wherein
The first ultrahigh frequency sensor is used for collecting monopulse signals generated by a first GIS in the GIS body;
the spatial ultrahigh frequency sensor is used for collecting spatial signals outside the GIS body;
the computing device is used for computing the first GIS generation single pulse signal and the space signal, and determining that the first GIS generation single pulse signal is a GIS partial discharge signal or an interference signal.
7. The system of claim 6, further comprising:
and the second ultrahigh frequency sensor is arranged on one side of the GIS body opposite to the first ultrahigh frequency sensor and is used for collecting the monopulse signals generated by the second GIS in the GIS body and checking the monopulse signals generated by the first GIS.
8. The system of claim 7, wherein the computing device is configured to calculate the first GIS generated single pulse signal and the spatial signal, and determine that the first GIS generated single pulse signal is a GIS partial discharge signal or an interference signal comprises:
respectively calculating a first maximum value of the first GIS generation monopulse signal in a preset time period and a second maximum value of the space signal in the preset time period;
comparing the first maximum value and the second maximum value in the preset time period, and determining that the first GIS single pulse signal in the preset time period is a GIS partial discharge signal or an interference signal.
9. The system of claim 8, wherein the operation of determining that the first GIS single pulse signal within the preset time period is a GIS partial discharge signal or an interference signal by performing the first maximum value and the second maximum value within the preset time period comprises:
judging that the first GIS generation single pulse signal in the preset time period is the GIS partial discharge signal to be verified under the condition that the first maximum value in the preset time period is larger than or equal to the second maximum value;
and under the condition that the first maximum value in the preset time period is smaller than the second maximum value, judging that the first GIS single pulse signal in the preset time period is the interference signal.
10. The system of claim 7, wherein the average transmission loss of the signal between the first uhf sensor and the second uhf sensor is no greater than 70dB between 300MHz and 1500 MHz.
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|---|---|
| CN (1) | CN116298713A (en) |
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2022
- 2022-12-13 CN CN202211603362.0A patent/CN116298713A/en active Pending
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