CN114114123A - Calibration device and method for partial discharge detection sensor - Google Patents
Calibration device and method for partial discharge detection sensor Download PDFInfo
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- CN114114123A CN114114123A CN202111434199.5A CN202111434199A CN114114123A CN 114114123 A CN114114123 A CN 114114123A CN 202111434199 A CN202111434199 A CN 202111434199A CN 114114123 A CN114114123 A CN 114114123A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
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Abstract
The application relates to a calibration device and method for a partial discharge detection sensor. The device comprises: adjusting the bracket; the output probe of the pulse signal generator is connected with the adjusting bracket and is used for sending out a pulse signal; the partial discharge detector is electrically connected with the partial discharge detection sensor and used for generating a pulse map according to the pulse signal; and adjusting the position and/or angle of the adjusting bracket to change the transmitting position and/or transmitting angle of the pulse signal generator, and judging whether the position and/or function of the partial discharge detection sensor meets a preset check standard according to the pulse map. The device can optimize the partial discharge detection sensor and the position thereof.
Description
Technical Field
The application relates to the technical field of power equipment monitoring, in particular to a calibration device and method of a partial discharge detection sensor.
Background
With the development of the power industry in China and the increasing scale of power grids, high-voltage power equipment is used as an important unit of a power system, and the stable operation of the high-voltage power equipment is related to the safe operation of the power system. Partial discharges are a precursor and a major manifestation of insulation faults in high voltage equipment. Partial discharges lead to a vicious cycle of deterioration and defects of the insulation of the electrical equipment and, in severe cases, even to insulation accidents. Therefore, the monitoring of partial discharge can avoid sudden insulation damage accidents of power equipment in operation. The partial discharge detection sensor is an important monitoring device for monitoring whether partial discharge occurs and the occurrence position.
However, due to the fact that technical levels of manufacturers are different, partial discharge detection sensors are low in sensitivity and unreasonable in configuration scheme, actual detection effects are poor, uncertainty is caused on partial discharge detection of electrical equipment, and operation safety of an electric power system is endangered.
Disclosure of Invention
In view of the above, it is necessary to provide a calibration apparatus and method for a partial discharge detection sensor, which can calibrate the partial discharge detection sensor, determine whether the function and/or the position of the partial discharge detection sensor are correct, and perform a targeted improvement to ensure the safety of a power system.
In order to achieve the above and other objects, an aspect of the present application provides a verification apparatus of a partial discharge detection sensor for verifying a partial discharge detection sensor in an electrical device, the apparatus including:
adjusting the bracket;
the output probe of the pulse signal generator is connected with the adjusting bracket and is used for sending out a pulse signal;
the partial discharge detector is electrically connected with the partial discharge detection sensor and used for generating a pulse map according to the pulse signal;
and adjusting the position and/or angle of the adjusting bracket to change the transmitting position and/or transmitting angle of the pulse signal generator, and judging whether the position and/or function of the partial discharge detection sensor meets a preset check standard according to the pulse map.
In the control method of the dc transformer in the above embodiment, the position and/or the angle of the adjusting bracket are/is adjusted, so as to change the transmitting position and/or the transmitting angle of the pulse signal generator, so as to simulate the phenomenon of partial discharge of the electrical equipment in an actual situation; and generating a pulse map by the pulse signal through a partial discharge detector so as to observe whether the function and/or the position of the partial discharge detection sensor meet the preset check standard or not visually according to the pulse map.
In one embodiment, the adjusting bracket comprises a first bracket, a preset number of second brackets and connecting clamps arranged corresponding to the second brackets, and the second brackets are connected with the first bracket through the connecting clamps. When the position and/or the angle of the adjusting bracket are/is adjusted in practical application, the adjusting bracket does not need to be reset, and only the number and the position of the second brackets need to be reset, so that the installation process is simplified.
In one embodiment, the connection clip is configured to:
the first bracket is connected with the first support in a sliding mode and used for moving on the first support along the extending direction of the first support; and/or
And the second bracket is connected with the second bracket in a sliding way and is used for moving on the second bracket along the extending direction of the second bracket. The device is further simplified by sliding the position of the second support relative to the first support, the number of the second supports is reduced under the condition of achieving the same effect, and the situation of different partial discharge occurrence positions in the switch cabinet is simulated conveniently and quickly by adjusting the extending length of the second support.
In one embodiment, the first bracket comprises:
a loop bar;
the sliding rod is arranged in the loop bar in a sliding manner;
and the two connecting ends are respectively arranged at the two ends of the first support and used for fixing the adjusting support in the electrical equipment. So as to lengthen or shorten the first bracket, thereby enabling the adjusting bracket to be suitable for any size space of any size electrical equipment.
In one embodiment, the connecting end comprises a magnetically attracted connecting end. So that the calibration device of the partial discharge detection sensor can be conveniently and quickly fixed in the electrical equipment through magnetic attraction and can be moved at will.
In one embodiment, the first support further comprises a gimbal disposed between the first support and the connecting end for changing a tilt angle of the first support. So that the adjusting bracket is fixed in the electrical equipment in an inclined mode, and parts in the electrical equipment are avoided.
In one embodiment, the second support comprises a mounting box, and the output probe is arranged in the mounting box. So as to protect the output probe of the pulse signal generator and avoid the damage caused by collision.
In one embodiment, the pulse signal generator is a multi-channel pulse signal generator. So as to transmit pulse signals through the multi-channel pulse signal generator sequentially through different output probes, avoid frequently adjusting the positions of the output probes and reduce the operation difficulty.
Another aspect of the present application provides a method for calibrating a partial discharge detection sensor, where the method includes:
placing the checking device in electrical equipment, and electrically connecting a partial discharge detector with a partial discharge detection sensor in the electrical equipment;
and adjusting the position and/or angle of the adjusting bracket, changing the transmitting position and/or transmitting angle of the pulse signal generator, and judging whether the position and/or function of the partial discharge detection sensor meets a preset check standard or not according to the pulse map.
In the partial discharge detection method, the checking device is firstly placed in the electrical equipment, partial discharge is simulated through the pulse signal generator, whether the partial discharge detection sensor detects partial discharge is judged through whether the partial discharge detector displays a pulse map, and finally the partial discharge detection sensor and the position of the partial discharge detection sensor are optimized according to the detection result.
In one embodiment, the method for verifying the partial discharge detection sensor further includes:
and preprocessing, namely adjusting the voltage of the pulse signal generator to the calibration voltage of the partial discharge detector, and judging whether the position and/or the function of the partial discharge detection sensor meet a preset check standard or not according to the pulse map. So as to determine whether the function of the verifying device is valid.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a calibration apparatus of a partial discharge detection sensor provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a calibration apparatus of a partial discharge detection sensor provided in another embodiment of the present application;
FIG. 3 is a schematic structural diagram of a calibration apparatus for a partial discharge detection sensor according to another embodiment of the present application;
FIG. 4 is a schematic structural diagram of a calibration apparatus for a partial discharge detection sensor according to yet another embodiment of the present application;
fig. 5 is a schematic flowchart of a method for verifying a partial discharge detection sensor according to an embodiment of the present disclosure;
fig. 6 is a schematic flowchart of a method for verifying a partial discharge detection sensor according to another embodiment of the present application.
Description of reference numerals:
10. a calibration device for the partial discharge detection sensor; 100. adjusting the bracket; 110. a first bracket; 111. a loop bar; 112. a slide bar; 113. a connecting end; 1131. the connecting end is magnetically attracted; 114. a universal joint; 120. a second bracket; 121 mounting a box; 122. a rotating shaft; 130. a connecting clip; 200. a pulse signal generator; 210. outputting the probe; 300. a partial discharge detector; 20. a partial discharge detection sensor.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments is understood to mean "electrical connection", "communication connection", or the like, if there is a transfer of electrical signals or data between the connected objects.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.
The partial discharge detection sensor is an important monitoring device for monitoring whether partial discharge occurs and the occurrence position. However, due to the fact that technical levels of manufacturers are different, partial discharge detection sensors are low in sensitivity and unreasonable in configuration scheme, actual detection effects are poor, uncertainty is caused on partial discharge detection of electrical equipment, and operation safety of an electric power system is endangered.
Referring to fig. 1, in one embodiment of the present application, a calibration apparatus 10 for a partial discharge detection sensor is provided for calibrating a partial discharge detection sensor 20 in an electrical device, the apparatus includes a tuning support 100, a pulse signal generator 200, and a partial discharge detector 300; the output probe 210 of the pulse signal generator 200 is connected with the adjusting bracket 100 and is used for sending out a pulse signal; the partial discharge detector 300 is electrically connected to the partial discharge detection sensor 20, and is configured to generate a pulse map according to the pulse signal;
the position and/or angle of the adjusting bracket 100 is adjusted to change the transmitting position and/or angle of the pulse signal generator 200, and whether the position and/or function of the partial discharge detection sensor 20 meets a preset calibration standard is determined according to the pulse map.
In the control method of the dc transformer in the above embodiment, the position and/or the angle of the adjusting bracket 100 are/is adjusted to change the transmitting position and/or the transmitting angle of the pulse signal generator 200, so as to simulate the phenomenon of partial discharge of the electrical equipment in an actual situation; and then the pulse signal is generated into a pulse map by the partial discharge detector 300, so as to visually observe whether the function and/or position of the partial discharge detection sensor 20 meet the preset check standard or not according to the pulse map. If the partial discharge detection sensor 20 can receive the pulse map sent by the pulse signal generator 200 when the output probe 210 of the pulse signal generator 200 is at different positions, it indicates that both the function and the position of the partial discharge detection sensor 20 meet the requirements.
As an example, referring to fig. 2, in one embodiment, the adjusting bracket 100 includes a first bracket 110, a predetermined number of second brackets 120, and a connecting clip 130 corresponding to the second brackets 120, and the second brackets 120 are connected to the first bracket 110 through the connecting clip 130.
Specifically, the preset number is a positive integer greater than or equal to 1. For example, when the preset number is 1, if partial discharge at different positions needs to be simulated, the connecting clip 130 needs to be removed, and then the second bracket 120 is moved to another position, and then the connecting clip 130 is placed and fixed. Therefore, when the position and/or the angle of the adjusting bracket 100 are/is adjusted in practical application, the adjusting bracket 100 does not need to be reset, and only the number and the position of the second brackets 120 need to be reset, so that the installation process is simplified. The first support 110 can be connected with a plurality of second supports 120, so that the output probes 210 can be placed at a plurality of positions in the electrical equipment at one time, and then the multichannel pulse signal generator sequentially transmits pulse signals through different output probes 210, thereby avoiding frequent adjustment of the positions of the output probes 210 and reducing the operation difficulty.
Continuing to refer to fig. 2, in one embodiment, the attachment clip 130 is configured to:
is slidably connected with the first bracket 110 and is used for moving on the first bracket 110 along the extending direction of the first bracket 110; and/or is slidably connected to the second frame 120, and is configured to move on the second frame 120 along the extending direction of the second frame 120.
Specifically, for example, when the preset number is 1, if partial discharges at different positions need to be simulated, since the connecting clip 130 can slide on both the first bracket 110 and the second bracket 120, when the position of the second bracket 120 needs to be changed, the connecting clip 130 is only moved along the extending direction of the first bracket 110; when it is necessary to change the depth of the second bracket 120, the connecting clip 130 is simply moved along the extending direction of the second bracket 120. So as to further simplify the device by sliding the position of the second support 120 relative to the first support 110, reduce the number of the second supports 120 under the same effect, and conveniently and quickly simulate the conditions of different partial discharge occurrence positions in the switch cabinet by adjusting the extension length of the second supports 120.
With continued reference to fig. 2, in one embodiment, the first bracket 110 includes a loop bar 111, a sliding bar 112 and two connecting ends 113; the sliding rod 112 is slidably arranged in the loop bar 111; the two connecting ends 113 are respectively disposed at two ends of the first bracket 110, and are used for fixing the adjusting bracket 100 in the electrical device. So as to lengthen or shorten the first bracket 110, thereby making the adjusting bracket 100 suitable for any size space of any size electric equipment.
Specifically, since the first bracket 110 includes the loop bar 111 and the sliding rod 112, and the sliding rod 112 is slidably disposed in the loop bar 111, the length of the first bracket 110 can be arbitrarily adjusted to adapt to electrical devices with different lengths and widths. The cross section of the sleeve 111 and the sliding rod 112 may be polygonal, such as triangle, quadrangle, pentagon, hexagon, etc., so that the sleeve 111 and the sliding rod 112 do not rotate relatively. The connecting end 113 is used for fixing, and may be, for example, a bolt connection, a nut, an insertion connection, a glue connection, a welding, a riveting, and the like.
For example, referring to fig. 3, in one embodiment, the connecting terminal 113 includes a magnetic connecting terminal 1131 to conveniently and quickly magnetically fix the calibration device 10 of the partial discharge detection sensor in the electrical apparatus, and can be moved freely.
Specifically, because electrical equipment is the metal material mostly, so choose to inhale magnetism to connect and be convenient for remove.
With continued reference to fig. 3, in one embodiment, the first support 110 further includes a universal joint 114, and the universal joint 114 is disposed between the first support 110 and the connecting end 113 for changing the inclination angle of the first support 110. So that the adjusting bracket 100 is fixed in the electrical equipment in an inclined manner, thereby avoiding parts in the electrical equipment.
By way of example, referring to fig. 4, in one embodiment, the second rack 120 includes a mounting box in which the output probe 210 is disposed. So as to protect the output probe 210 of the pulse signal generator 200 and avoid damage caused by collision.
Specifically, the mounting box can be mounted through a rotating shaft 121 when being connected with a rod in the second bracket 120; 122, so that the orientation of the output probe 210 can be changed by rotating the mounting box after the output probe 210 of the pulse signal generator 200 is placed in the mounting box.
In one embodiment, the pulse signal generator 200 is a multi-channel pulse signal generator 200. So that the multi-channel pulse signal generator 200 can transmit pulse signals sequentially through different output probes 210, thereby avoiding frequent adjustment of the positions of the output probes 210 and reducing the operation difficulty.
Specifically, when the preset number is greater than 1, the output probes 210 need to be placed at a plurality of positions in the electrical device at one time, and then the multi-channel pulse signal generator 200 sequentially transmits pulse signals through the different output probes 210, so that frequent adjustment of the positions of the output probes 210 is avoided, and the operation difficulty is reduced.
The output probe 210 of the pulse signal generator 200 is mounted on the adjusting bracket 100, so that the partial discharge detection sensor 20 can be checked from multiple positions in the electrical equipment, the checking effect is improved, the mounting position of the partial discharge detection sensor 20 can be optimized, and the safe operation of the power system is ensured.
Referring to fig. 5, in an embodiment of the present application, a method for verifying a partial discharge detection sensor is provided, where the method for verifying a partial discharge detection sensor according to any embodiment of the present application is adopted, and the method includes the following steps:
step S20: and placing the checking device in the electrical equipment, and electrically connecting the partial discharge detector with a partial discharge detection sensor in the electrical equipment.
Specifically, an adjusting bracket is fixed in the electrical equipment, an output probe of a pulse signal generator is installed in an installation box of the adjusting bracket, and the position and the angle of the output probe are adjusted through the adjusting bracket; the partial discharge detector is connected to the output of the partial discharge detection sensor by a low loss coaxial cable.
Step S40: and adjusting the position and/or angle of the adjusting bracket, changing the transmitting position and/or transmitting angle of the pulse signal generator, and judging whether the position and/or function of the partial discharge detection sensor meets a preset check standard or not according to the pulse map.
Specifically, the position of an output probe of the pulse signal generator in the electrical equipment is adjusted, and whether the partial discharge detector receives a pulse map sent by the pulse signal generator or not is observed; the position and the angle of the output probe of the pulse signal generator are adjusted by adjusting the bracket, so that partial discharge at different positions of the electrical equipment can be simulated, and the detection capability of the partial discharge detection sensor on partial discharge signals at different positions can be verified. And finally, judging whether the partial discharge detection sensor works normally or not and whether the layout is reasonable or not according to the pulse map result. If the partial discharge detection sensor can receive the pulse map sent by the pulse signal generator when the output probe of the pulse signal generator is at different positions, the function and the position of the partial discharge detection sensor meet the requirements.
In the partial discharge detection method, the checking device is firstly placed in the electrical equipment, partial discharge is simulated through the pulse signal generator, whether the partial discharge detection sensor detects partial discharge is judged through whether the partial discharge detector displays a pulse map, and finally the partial discharge detection sensor and the position of the partial discharge detection sensor are optimized according to the detection result.
In one embodiment, the method for verifying the partial discharge detection sensor further includes:
step S10: and preprocessing, namely adjusting the voltage of the pulse signal generator to the calibration voltage of the partial discharge detector, and judging whether the position and/or the function of the partial discharge detection sensor meet a preset check standard or not according to the pulse map. So as to determine whether the function of the verifying device is valid.
Specifically, the pulse signal may be 1.5GHz, and the repetition frequency may be adjusted to 40-70Hz, for example, the repetition frequency may be 40Hz, 50Hz, 60Hz, or 70 Hz.
It should be understood that although the various steps in the flowcharts of fig. 5-6 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 5-6 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least some of the other steps.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A verification apparatus for a partial discharge detection sensor, for verifying a partial discharge detection sensor in an electrical device, the apparatus comprising:
adjusting the bracket;
the output probe of the pulse signal generator is connected with the adjusting bracket and is used for sending out a pulse signal;
the partial discharge detector is electrically connected with the partial discharge detection sensor and used for generating a pulse map according to the pulse signal;
and adjusting the position and/or angle of the adjusting bracket to change the transmitting position and/or transmitting angle of the pulse signal generator, and judging whether the position and/or function of the partial discharge detection sensor meets a preset check standard according to the pulse map.
2. The apparatus of claim 1, wherein the adjusting bracket comprises a first bracket, a predetermined number of second brackets, and a connecting clip corresponding to the second brackets, and the second brackets are connected to the first bracket through the connecting clip.
3. The verification device of partial discharge detection sensors according to claim 2, wherein the connection clip is configured to:
the first bracket is connected with the first support in a sliding mode and used for moving on the first support along the extending direction of the first support; and/or
And the second bracket is connected with the second bracket in a sliding way and is used for moving on the second bracket along the extending direction of the second bracket.
4. The apparatus of claim 2, wherein the first support comprises:
a loop bar;
the sliding rod is arranged in the loop bar in a sliding manner;
and the two connecting ends are respectively arranged at the two ends of the first support and used for fixing the adjusting support in the electrical equipment.
5. The device of claim 4, wherein the connection end comprises a magnetically attracted connection end.
6. The device as claimed in any one of claims 2 to 5, wherein the first support further comprises a gimbal, the gimbal being disposed between the first support and the connecting end for changing an inclination of the first support.
7. The apparatus of any of claims 2-5, wherein the second support includes a mounting box, and the output probe is disposed within the mounting box.
8. The apparatus of any of claims 1-5, wherein the pulse signal generator is a multi-channel pulse signal generator.
9. A method of verifying a partial discharge detection sensor, characterized by using the verification apparatus for a partial discharge detection sensor according to any one of claims 1 to 8, the method comprising:
placing the checking device in electrical equipment, and electrically connecting a partial discharge detector with a partial discharge detection sensor in the electrical equipment;
and adjusting the position and/or angle of the adjusting bracket, changing the transmitting position and/or transmitting angle of the pulse signal generator, and judging whether the position and/or function of the partial discharge detection sensor meets a preset check standard or not according to the pulse map.
10. The method of verifying a partial discharge detection sensor of claim 9, the method further comprising:
and preprocessing, namely adjusting the voltage of the pulse signal generator to the calibration voltage of the partial discharge detector, and judging whether the position and/or the function of the partial discharge detection sensor meet a preset check standard or not according to the pulse map.
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