CN111722169A - Anti-interference performance detection device and method of high-frequency partial discharge detector - Google Patents
Anti-interference performance detection device and method of high-frequency partial discharge detector Download PDFInfo
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Abstract
The application relates to an anti-interference performance detection device and method of a high-frequency partial discharge detector. The anti-interference performance detection device of the high-frequency partial discharge detector comprises a partial discharge signal generation module, a first signal acquisition module, an interference signal generation module, a second signal acquisition module and a signal processing module. The partial discharge signal generating module is used for generating a partial discharge signal; the first signal acquisition module is in signal connection with the partial discharge signal generation module and is used for acquiring the partial discharge signal; the interference signal generating module is used for generating interference signals with different amplitudes; the second signal acquisition module is in signal connection with the interference signal generation module and is used for acquiring the interference signal. The signal processing module is in signal connection with the first signal acquisition module and the second signal acquisition module. The anti-interference performance detection device of the high-frequency partial discharge detector provided by the embodiment of the application can realize the detection of the anti-interference performance of the high-frequency partial discharge detector.
Description
Technical Field
The application relates to the technical field of power systems, in particular to an anti-interference performance detection device and method of a high-frequency partial discharge detector.
Background
The charged high-frequency partial discharge detection is the most effective means for detecting the line state of the high-voltage cable. A high frequency partial discharge detector is generally used to detect the high frequency partial discharge. The performance detection of the high-frequency partial discharge detector is crucial to the accuracy of high-frequency partial discharge detection.
In the conventional technology, the detection of the performance of the high-frequency partial discharge detector is mainly to detect the sensitivity of the high-frequency partial discharge detector under the laboratory condition. However, the detection of the sensitivity can only reflect the partial discharge detection capability of the high-frequency partial discharge detector in the case of no interference signal, and cannot detect the partial discharge detection capability of the high-frequency partial discharge detector in the case of an interference signal, that is, the anti-interference performance of the high-frequency partial discharge detector. The anti-interference performance of the high-frequency partial discharge detector is an important performance that affects the detection accuracy, and therefore, a device capable of detecting the anti-interference performance of the high-frequency partial discharge detector is needed.
Disclosure of Invention
Therefore, in order to solve the above technical problems, it is necessary to provide an apparatus and a method for detecting an anti-interference performance of a high-frequency partial discharge detector.
On the one hand, this application embodiment provides a high frequency partial discharge detector's anti-interference performance detection device, includes:
the partial discharge signal generating module is used for generating a partial discharge signal;
the first signal acquisition module is in signal connection with the partial discharge signal generation module and is used for acquiring the partial discharge signal;
the interference signal generating module is used for generating interference signals with different amplitudes;
the second signal acquisition module is in signal connection with the interference signal generation module and is used for acquiring the interference signal;
the signal processing module is in signal connection with the first signal acquisition module and the second signal acquisition module, and is used for determining a maximum interference signal which can be resisted by the high-frequency partial discharge detector to be detected according to a detection result of the partial discharge signal of the high-frequency partial discharge detector to be detected under the interference of the interference signals with different amplitudes, and determining the anti-interference performance of the high-frequency partial discharge detector to be detected according to the maximum interference signal and the partial discharge signal.
In one embodiment, the partial discharge signal generating module includes:
a plate electrode for generating an electric field;
the partial discharge signal generating assembly is in signal connection with the first signal collecting module, arranged in the electric field and used for generating the partial discharge signal based on the electric field.
In one embodiment, the partial discharge signal generating module further includes:
the insulating oil cup is provided with a containing cavity, the flat electrode and the partial discharge signal generating assembly are arranged in the containing cavity, and the insulating oil cup is used for isolating air.
In one embodiment, the interference signal generating module comprises:
a cable termination assembly for generating an initial interference signal;
and the signal amplification assembly is electrically connected with the cable terminal assembly and is used for amplifying the initial interference signals by different times to obtain the interference signals with different amplitudes.
In one embodiment, the method further comprises the following steps:
the third signal acquisition module is in signal connection with the partial discharge signal generation module and the interference signal generation module and is used for acquiring a mixed signal formed by the partial discharge signal and the interference signal, and the high-frequency partial discharge detector to be detected is used for detecting the partial discharge signal in the mixed signal.
In one embodiment, the signal processing module is specifically configured to determine the degree of interference resistance of the high-frequency partial discharge detector to be detected according to the maximum amplitude of the maximum interference signal and the maximum amplitude of the partial discharge signal, so as to determine the anti-interference performance of the high-frequency partial discharge detector to be detected.
In one embodiment, the method further comprises the following steps:
the power supply module is electrically connected with the partial discharge signal generating module and the signal processing module;
the transformer is electrically connected between the power supply module and the partial discharge signal generation module and between the power supply module and the signal processing module, and is used for adjusting the voltage of the power supply provided by the power supply module to the partial discharge signal generation module and the signal processing module.
In one embodiment, the first signal acquisition module and the second signal acquisition module are high-frequency current transformers.
On the other hand, an embodiment of the present application further provides a method for detecting an anti-interference performance of a high-frequency partial discharge detector to be detected by using the above-mentioned anti-interference performance detection apparatus for a high-frequency partial discharge detector, including:
generating a partial discharge signal through the partial discharge signal generating module, and acquiring the partial discharge signal through the first signal acquisition module;
generating interference signals with different amplitudes through the interference signal generating module;
detecting the partial discharge signals under the interference of the interference signals with different amplitudes by the high-frequency partial discharge detector to be detected to obtain a detection result;
the signal processing module determines the maximum interference signal which can be resisted by the high-frequency partial discharge detector to be detected according to the detection result, acquires the maximum interference signal through the second signal acquisition module, and determines the anti-interference performance of the high-frequency partial discharge detector to be detected according to the partial discharge signal and the maximum interference signal.
In one embodiment, the determining, by the signal processing module, the anti-interference performance of the to-be-detected high-frequency partial discharge detector according to the partial discharge signal and the maximum interference signal includes:
determining the anti-interference degree of the high-frequency partial discharge detector to be detected according to the ratio of the maximum amplitude of the maximum interference signal to the maximum amplitude of the partial discharge signal;
and determining the anti-interference performance of the high-frequency partial discharge detector to be detected according to the anti-interference degree.
The device comprises a partial discharge signal generation module, a first signal acquisition module, an interference signal generation module, a second signal generation module and a signal processing device. The interference signal generating module can generate interference signals with different amplitudes, so that the high-frequency partial discharge detector to be detected can detect partial discharge signals under the interference of the interference signals with different amplitudes. The signal processing module determines the maximum interference signal which can be resisted by the high-frequency partial discharge detector to be detected according to the detection result of the high-frequency partial discharge detector to be detected on the partial discharge signal, and can determine the anti-interference performance of the high-frequency partial discharge detector to be detected according to the partial discharge signal and the maximum interference signal, so that the problem that the existing method or device for detecting the anti-interference performance of the high-frequency partial discharge detector to be detected is absent is solved.
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 description of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an anti-interference performance detection apparatus of a high-frequency partial discharge detector according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a partial discharge signal generating module according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an interference signal generating module according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of an anti-interference performance detection apparatus of a high-frequency partial discharge detector according to an embodiment of the present application;
fig. 5 is a schematic flowchart illustrating steps of a method for detecting an anti-interference performance of a high-frequency partial discharge detector according to an embodiment of the present application;
fig. 6 is a schematic step flow diagram of an anti-interference performance detection method of a high-frequency partial discharge detector according to an embodiment of the present application.
Description of the reference numerals
10. A high-frequency partial discharge detector to be detected;
20. an anti-interference performance detection device of the high-frequency partial discharge detector;
100. a partial discharge signal generating module;
110. a plate electrode;
120. a partial discharge signal generating element;
130. an insulating oil cup;
200. a first signal acquisition module;
300. an interference signal generating module;
310. a cable termination assembly;
311. a high voltage single core cable;
312. a cable termination metal tail pipe;
313. a wiring board;
314. a cable termination metal base;
315. a cable termination bushing;
315. the cable terminal is connected with a wire rod;
317. an overhead conductor;
320. a signal amplification component;
400. a second signal acquisition module;
500. a signal processing module;
600. a third signal acquisition module;
700. a power supply module;
800. a transformer.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
The following describes the technical solutions of the present application and how to solve the above technical problems with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.
The application provides an anti-interference performance detection device of detector is put in high frequency office can be used for detecting the anti-interference performance of waiting to detect the detector is put in the high frequency office. The high-frequency partial discharge detector to be detected is a device for detecting partial discharge signals. The anti-interference performance of the high-frequency partial discharge detector to be detected refers to the resistance of the high-frequency partial discharge detector to be detected to an interference signal during detection, that is, the ability of the high-frequency partial discharge detector to be detected to detect a partial discharge signal under the interference of the interference signal.
Referring to fig. 1, an embodiment of the present application provides an anti-interference performance detecting apparatus 20 of a high-frequency partial discharge detector, which includes a partial discharge signal generating module 100, a first signal collecting module 200, an interference signal generating module 300, a second signal collecting module 400, and a signal processing module 500.
The partial discharge signal generating module 100 is configured to generate a partial discharge signal. The partial discharge signal is a partial discharge signal. Partial discharge refers to discharge occurring in a local range of the insulation of the electrical equipment under the action of a strong enough electric field, and the discharge is limited to only cause the insulation between conductors to be locally short-circuited without forming conduction. The partial discharge signal generating module 100 is capable of generating the partial discharge signal to simulate an environment where the partial discharge signal is generated in an actual application scene. The partial discharge signal generating module 100 may generate partial discharge signals with different sizes according to actual requirements. The partial discharge signal generating module 100 may be a partial discharge signal generator, a partial discharge signal simulator, or the like, and the specific type and structure of the partial discharge signal generating module 100 are not limited in this embodiment as long as the partial discharge signal can be generated.
The first signal collecting module 200 is in signal connection with the partial discharge signal generating module 100, and is configured to collect the partial discharge signal. The first signal collecting module 200 may represent the partial discharge signal by collecting a current signal or a voltage signal generated by partial discharge, so the first signal collecting module 200 may be a device capable of collecting a current signal or a device capable of collecting a voltage signal. If the first signal collecting module 200 represents the partial discharge signal by collecting a voltage signal generated by partial discharge, the first signal collecting module 200 may be a voltage transformer or a voltage sensor. In this embodiment, there is no limitation on the type of the first signal collecting module 200, and there is no limitation on the setting position of the first signal collecting module 200, as long as the partial discharge signal can be collected.
The interference signal generating module 300 is configured to generate interference signals with different amplitudes. In an actual scene, the high-frequency partial discharge detector 10 to be detected may be interfered by other signals when detecting a partial discharge signal, and the interference signal generating module 300 may be used to simulate the actual scene to generate interference signals with different amplitudes. The interference signal generating module 300 may randomly generate interference signals with different amplitudes, or may generate interference signals with different amplitudes according to a certain rule. For example: the interference signal generating module 300 may generate the interference signals with different amplitudes in a sequence from small to large at a certain amplitude interval, or may generate the interference signals with different amplitudes in a sequence from large to small at a certain amplitude interval.
The second signal collecting module 400 is in signal connection with the interference signal generating module 300, and is configured to collect the interference signal. The second signal collecting module 400 may characterize the interference signal by collecting the current signal or the voltage signal generated by the interference signal generating module 300. The second signal collecting module 400 may be a device capable of collecting current signals, and may also be a device capable of collecting voltage signals. If the second signal collecting module 400 represents the interference signal by collecting the voltage signal generated by the interference signal generating module 300, the second signal collecting module 400 may be a voltage transformer or a voltage sensor. If the first signal collecting module 200 is used to represent the partial discharge signal by collecting the voltage signal generated by the partial discharge, the second signal collecting module 400 also needs to represent the interference signal by collecting the voltage signal generated by the interference signal generating module 300. In this embodiment, there is no limitation on the type of the second signal acquisition module 400, and there is no limitation on the setting position of the second signal acquisition module 400, as long as the interference signal can be acquired.
The signal processing module 500 is in signal connection with the first signal acquisition module 200 and the second signal acquisition module 400. The signal processing module 500 has 3 input terminals, and a first input terminal is in signal connection with the first signal acquisition module 200 and is used for inputting the partial discharge signal; the second input end is in signal connection with the second signal acquisition module 400 and is used for inputting the maximum interference signal; the third input end is in signal connection with the high-frequency partial discharge detector 10 to be detected, and is used for inputting the detection result of the high-frequency partial discharge detector 10 to be detected. The high-frequency partial discharge detector 10 to be detected detects the partial discharge signal under the interference of the interference signals with different amplitudes, and obtains a detection result. The signal processing module 500 determines the maximum interference signal that the high-frequency partial discharge detector 10 to be detected can resist according to the received detection result, and determines the anti-interference performance of the high-frequency partial discharge detector 10 to be detected according to the maximum interference signal and the partial discharge signal. The signal processing module 500 may be, but is not limited to, a control chip, a personal computer, a notebook computer, a smart phone, a tablet computer, and a portable wearable device.
The working principle of the anti-interference performance detection device 20 of the high-frequency partial discharge detector is as follows:
the partial discharge signal generating module 100 is used for generating the partial discharge signal, and the partial discharge signal is acquired through the first signal acquisition module 200 and is fixed. The interference signal generating module 300 is utilized to generate interference signals with different amplitudes, and the high-frequency partial discharge detector 10 to be detected detects the partial discharge signals under the interference of the interference signals with different amplitudes. The signal processing module 500 is utilized to record each detection result, analyze the detection result, and determine the maximum interference signal that the high-frequency partial discharge detector 10 to be detected can resist, that is, determine the interference signal of the high-frequency partial discharge detector 10 to be detected when the partial discharge signal can be detected and the critical point of the partial discharge signal cannot be detected, where the interference signal at this time is the maximum interference signal. The second signal acquisition module 400 is utilized to acquire the maximum interference signal. The signal processing module 500 determines the anti-interference performance of the high-frequency partial discharge detector 10 to be detected according to the partial discharge signal and the maximum interference signal.
The device for detecting the anti-interference performance of the high-frequency partial discharge detector and the method thereof provided by the embodiment include a partial discharge signal generating module 100, a first signal collecting module 200, an interference signal generating module 300, a second signal generating module 400 and a signal processing module 500. The interference signal generating module 300 can generate interference signals with different amplitudes, so that the high-frequency partial discharge detector to be detected detects partial discharge signals under the interference of the interference signals with different amplitudes. The signal processing module 500 determines the maximum interference signal that the high-frequency partial discharge detector 10 to be detected can resist according to the detection result of the high-frequency partial discharge detector 10 to be detected on the partial discharge signal, and performs calculation processing according to the partial discharge signal and the maximum interference signal, so that the anti-interference performance of the partial discharge detector to be detected can be determined, the problem that the existing method or device for detecting the anti-interference performance of the high-frequency partial discharge detector 10 to be detected is absent is solved, meanwhile, the product quality of the partial discharge detector can be optimized by a manufacturer, and a worker can be guided to select a proper partial discharge detector in different application scenes.
Referring to fig. 2, in an embodiment, the partial discharge signal generating module 100 includes a plate electrode 110 and a partial discharge signal generating element 120.
The plate electrode 110 is used to generate an electric field. The plate electrode 110 may be composed of two rectangular plates, and the two plates are disposed in parallel and opposite to each other. The electric field can be generated by providing power for the two polar plates, and the electric field between the two polar plates can be regarded as a uniform electric field.
The partial discharge signal generating assembly 120 is in signal connection with the first signal collecting module 200, and the first signal collecting module 200 is configured to collect the partial discharge signal generated by the partial discharge signal generating assembly 120. The partial discharge signal generating component 120 is disposed in the electric field, and is configured to generate the partial discharge signal based on the electric field. The partial discharge signal generating element 120 may be a test strip with an air gap defect, which can generate a partial discharge signal under a certain electric field strength. In the actual situation, the partial discharge is generated inside the cable insulation, and the test piece with the air gap defect is used for replacing the cable. The voltages of the power supplies provided to the two plates are different, so that the electric field intensities generated by the two plates are different, and the partial discharge signal generated by the partial discharge signal generating component 120 is also different. The partial discharge signal generating assembly 120 may be disposed between two plates, and the partial discharge signal generated by the partial discharge signal generating assembly 120 may be more stable because the electric field between the two plates is a uniform electric field.
In this embodiment, the partial discharge signal generating module 100 formed by the plate electrode 110 and the partial discharge signal generating element 120 has a simple structure and is easy to implement. And by providing the power supply with different voltage levels to the flat plate electrode 110, the partial discharge signal generating assembly 120 can generate different partial discharge signals, so as to improve the practicability of the partial discharge signal generating module 100, and thus improve the practicability of the anti-interference signal detecting device 20 of the high-frequency partial discharge detector.
With continued reference to fig. 2, in an embodiment, the partial discharge signal generating module 100 further includes an insulating oil cup 130. The insulating oil cup 130 is provided with a containing cavity, the flat electrode 110 and the partial discharge signal generating assembly 120 are arranged in the containing cavity, and the insulating oil cup 130 is used for isolating air. The insulating oil is filled in the insulating oil cup 130, and the plate electrode 110 and the partial discharge signal generating assembly 120 are both immersed in the insulating oil. Because the insulation level of the air is low, when the partial discharge signal generating assembly 120 generates the partial discharge signal, the partial discharge signal may be affected by the creeping discharge interference, and the creeping discharge interference may be eliminated by disposing the plate electrode 110 and the partial discharge signal generating assembly 120 in the insulating oil cup 130, so that the accuracy and reliability of the partial discharge signal generated by the partial discharge signal generating assembly 120 may be improved.
Referring to fig. 3, in one embodiment, the interference signal generating module 300 includes a cable termination component 310 and a signal amplification component 320.
The cable termination assembly 310 is used to generate an initial interference signal. The cable termination component 310 may be a grid device that, when operating in a live mode, may generate the initial interference signal. The voltage grade of the power grid equipment is more than 110KV, and the higher the voltage grade is, the longer the overhead line is, and the more beneficial the initial interference signal is generated. In particular, the cable termination assembly 310 may be a high voltage class outdoor substation, an electrified rail user substation, or the like.
In one particular embodiment, as shown in fig. 3, the cable termination assembly 310 may include a high voltage mono-core cable 311, a cable termination metal tail tube 312, a terminal block 313, a cable termination metal base 314, a cable termination sleeve 315, a cable termination bar 316, and an overhead conductor 317. The high-voltage single-core cable 311 is sleeved with a cable terminal metal tail pipe 312; one end of the wiring board 313 is electrically connected to the cable terminal metal tail pipe 312; a cable termination metal base 314 is disposed between the cable termination metal tail tube 312 and the cable termination sleeve 315; the cable termination bar 316 is electrically connected to the cable termination sleeve 315; the cable termination sleeve 315 is electrically connected to an overhead conductor 317. The other end of the wiring board 313 is connected to the signal amplification block 320. The cable termination metal tail pipe 312 and the signal amplification assembly 320 are grounded.
The signal amplification assembly 320 is electrically connected to the cable termination assembly 310, and is configured to amplify the initial interference signal by different times, so as to obtain the interference signals with different amplitudes. The signal amplification component 320 is a signal amplifier with adjustable amplification factor. The signal amplifier may amplify the initial interference signal generated during operation of the cable termination assembly 310 by different amplification factors and by different amplitudes of the generated interference signal.
In this embodiment, the initial interference signal generated by the cable terminal component 310 is closer to an interference signal in an actual application scenario, so that the anti-interference performance detection device 20 of the high-frequency partial discharge detector can more accurately detect the anti-interference performance of the high-frequency partial discharge detector 10 to be detected. And the initial interference signal is amplified by the signal amplification component 320, so that interference signals with different amplitudes can be obtained, and the practicability of the interference signal generation module 300 can be improved, thereby improving the practicability of the anti-interference performance detection device 20 of the high-frequency partial discharge detector.
Referring to fig. 4, in an embodiment, the anti-interference performance detecting apparatus 20 of the high-frequency partial discharge detector further includes a third signal collecting module 600. The third signal collecting module 600 is in signal connection with both the partial discharge signal generating module 100 and the interference signal generating module 300, and is configured to collect a mixed signal formed by the partial discharge signal and the interference signal. The high-frequency partial discharge detector 10 to be detected is in signal connection with the third signal acquisition module 600, and is configured to detect the partial discharge signal in the mixed signal. The mixed signal may be characterized by a current signal or a voltage signal, and the third signal collecting module 600 may be a device capable of collecting the current signal or a device capable of collecting the voltage signal. For a detailed description of the third signal acquisition module 600, reference may be made to the above description of the first signal acquisition module 200 and the second signal acquisition module 400, and details are not repeated here.
In an embodiment, the signal processing module 500 is specifically configured to determine the interference rejection of the high-frequency partial discharge detector 10 to be detected according to the maximum amplitude of the maximum interference signal and the maximum amplitude of the partial discharge signal, so as to determine the interference rejection of the high-frequency partial discharge detector 10 to be detected. The signal processing module 500 may respectively represent the maximum interference signal and the partial discharge signal by a waveform diagram. The maximum amplitude in the waveform diagram of the maximum interference signal and the maximum amplitude in the waveform diagram of the partial discharge signal can be obtained through analyzing the waveform diagrams. The signal processing module 500 may obtain the interference rejection of the high-frequency partial discharge detector 10 to be detected by calculating a ratio of the maximum amplitude of the maximum interference signal to the maximum amplitude of the partial discharge signal. The anti-interference performance of the high-frequency partial discharge detector 10 to be detected can be determined according to the anti-interference degree. The higher the interference resistance is, the stronger the resistance of the high-frequency partial discharge detector 10 to be detected to an interference signal during detection is, that is, the better the interference resistance of the high-frequency partial discharge detector 10 to be detected is.
Referring to fig. 4, in an embodiment, the anti-interference performance detecting apparatus 20 of the high-frequency partial discharge detector further includes a power module 700 and a transformer 800.
The power module 700 is electrically connected to the partial discharge signal generating module 100 and the signal processing module 500. The power module 700 may be a commercial power or an energy storage battery. The transformer 800 is electrically connected between the power module 700 and the partial discharge signal generating module 100, and is electrically connected between the power module 700 and the signal processing module 500, and the transformer 800 is configured to adjust a voltage of a power supplied from the power module 700 to the partial discharge signal generating module 100 and the signal processing module 500. The transformer 800 is a device for changing an ac voltage using the principle of electromagnetic induction, and has a primary coil, a secondary coil, and an iron core as main components. Specifically, the transformer 800 includes a transformer V1, a transformer V2, and a transformer V3. Transformer V1 may be an adjustable transformer and transformers V2 and V3 may be fixed transformers. The voltages at the output terminals of the transformer V2 and the transformer V3 can be changed by adjusting the transformer V1, so as to achieve the voltages required by the partial discharge signal generating module 100 and the signal processing module 500. In a specific embodiment, when the voltage of the commercial power is 220V, the voltage of the signal processing module 500 is 10V, and the voltage of the partial discharge signal generating module 100 is 10KV by adjusting the transformer V1. In this embodiment, the power module 700 and the transformer 800 can provide the required voltage for the partial discharge signal generating module 100 and the signal processing module 500 very conveniently, so as to improve the practicability of the anti-interference performance detecting device 20 of the high-frequency partial discharge detector.
In one embodiment, the first signal acquisition module 200 and the second signal acquisition module 400 are high frequency current transformers. The first signal collecting module 200 may collect a current signal generated by partial discharge to represent the partial discharge signal, and the second signal collecting module 400 may collect a current signal generated by the interference signal generating module 300 to represent the interference signal, so that the high-frequency current transformer may be used to collect the partial discharge signal and the interference signal. The principle of the high-frequency current transformer is based on the electromagnetic induction principle and generally consists of a closed iron core and a winding. The impedance of the high-frequency current transformer is very small, the partial discharge signal and the interference signal acquired by the high-frequency current transformer are relatively accurate, and the accuracy of the anti-interference performance detection device 20 of the high-frequency partial discharge detector 10 to be detected is improved.
Referring to fig. 5, an embodiment of the present application further provides a method for detecting an anti-interference performance of a high-frequency partial discharge detector to be detected by using the anti-interference performance detection apparatus of the high-frequency partial discharge detector according to any one of the above embodiments, including:
s100, generating a partial discharge signal through the partial discharge signal generating module 100, and acquiring the partial discharge signal through the first signal collecting module 200.
S200, generating the interference signals with different amplitudes through the interference signal generating module 300.
The partial discharge signal generating module 100 can generate different partial discharge signals, and when the high-frequency partial discharge detector to be detected is detected, the partial discharge signal generating module 100 generates one partial discharge signal, and the partial discharge signal is not changed in the detection process. When the present detection is finished and the next detection is started, the partial discharge signal generating module 100 may generate a partial discharge signal different from the previous detection. When the high-frequency partial discharge detector to be detected is detected, the detection of the anti-interference performance of the high-frequency partial discharge detector 10 to be detected is realized by changing the difference of the interference signals generated by the interference signal generating module 300. In short, the partial discharge signal generated by the partial discharge signal generating module 100 during the detection process is fixed, and the interference signal generated by the interference signal generating module 300 during the detection process is variable. For specific description of the partial discharge signal generating module 100 and the partial discharge signal, and specific description of the interference signal generating module 300 and the interference signals with different amplitudes, reference may be made to the description in the anti-interference performance detecting apparatus 10 of the high-frequency partial discharge detector, and details are not repeated here.
S300, detecting the partial discharge signals under the interference of the interference signals with different amplitudes through the high-frequency partial discharge detector 10 to be detected to obtain a detection result.
S400, the signal processing module 500 determines the maximum interference signal that the high-frequency partial discharge detector 10 to be detected can resist according to the detection result, and obtains the maximum interference signal through the second signal collecting module 400.
And S500, the signal processing module 500 determines the anti-interference performance of the high-frequency partial discharge detector 10 to be detected according to the partial discharge signal and the maximum interference signal.
Under the interference of the interference signals with different amplitudes, the high-frequency partial discharge detector 10 to be detected detects the partial discharge signals. The signal processing module 500 is utilized to record each detection result, analyze the detection result, and determine the maximum interference signal that the high-frequency partial discharge detector 10 to be detected can resist, that is, determine the interference signal of the high-frequency partial discharge detector 10 to be detected when the partial discharge signal can be detected and the critical point of the partial discharge signal cannot be detected, where the interference signal is the maximum interference signal. The signal processing module 500 calculates and processes the partial discharge signal and the maximum interference signal, and determines the anti-interference performance of the high-frequency partial discharge detector 10 to be detected through a calculation structure.
The detection method for the high-frequency partial discharge detector 10 to be detected is to use the detection device 20 for detecting the anti-interference performance of the high-frequency partial discharge detector, and specific beneficial effects of the method can refer to the description of the detection device 10 for detecting the anti-interference performance of the high-frequency partial discharge detector, which is not described herein again.
In a specific embodiment, the interference signal generating module 300 may first generate an interference signal with a minimum amplitude, determine whether the high-frequency partial discharge detector 10 to be detected can detect a partial discharge signal, and if the high-frequency partial discharge detector to be detected can also detect the partial discharge signal, the interference signal generating module 300 increases the amplitude of the generated interference signal according to a certain rule until the high-frequency partial discharge detector 10 to be detected cannot detect the partial discharge signal, and uses the interference signal at this time as the maximum interference signal.
Referring to fig. 6, in an embodiment, in step S500, the determining, by the signal processing module 500, the anti-interference performance of the high-frequency partial discharge detector 10 to be detected according to the partial discharge signal and the maximum interference signal includes:
s510, determining an interference rejection of the high-frequency partial discharge detector 10 to be detected according to a ratio of the maximum amplitude of the maximum interference signal to the maximum amplitude of the partial discharge signal.
And S520, determining the anti-interference performance of the high-frequency partial discharge detector 10 to be detected according to the anti-interference degree.
The signal processing module 500 may convert the maximum interference signal into an interference waveform diagram, and obtain the maximum amplitude of the maximum interference signal through analysis of the interference waveform diagram. The signal processing module 500 also converts the partial discharge signal into a partial discharge oscillogram, and obtains the maximum amplitude of the partial discharge signal through analysis of the partial discharge oscillogram. The signal processing module 500 calculates a ratio of the maximum amplitude of the maximum interference signal to the maximum amplitude of the partial discharge signal, so as to obtain a value, which is recorded as the interference immunity of the high-frequency partial discharge detector 10 to be detected. The anti-interference performance of the high-frequency partial discharge detector 10 to be detected can be determined according to the anti-interference degree. If the interference resistance is higher, the interference resistance of the high-frequency partial discharge detector 10 to be detected is better.
In an embodiment, the signal processing module 500 may calculate a ratio of the maximum amplitude of the partial discharge signal to the maximum amplitude of the maximum interference signal to obtain a value, which is recorded as an anti-interference value. The smaller the anti-interference value is, the better the anti-interference performance of the high-frequency partial discharge detector 10 to be detected is
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 present application. 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. The utility model provides an anti-interference performance detection device of detector is put in high frequency office which characterized in that includes:
the partial discharge signal generating module is used for generating a partial discharge signal;
the first signal acquisition module is in signal connection with the partial discharge signal generation module and is used for acquiring the partial discharge signal;
the interference signal generating module is used for generating interference signals with different amplitudes;
the second signal acquisition module is in signal connection with the interference signal generation module and is used for acquiring the interference signal;
the signal processing module is in signal connection with the first signal acquisition module and the second signal acquisition module, and is used for determining a maximum interference signal which can be resisted by the high-frequency partial discharge detector to be detected according to a detection result of the partial discharge signal of the high-frequency partial discharge detector to be detected under the interference of the interference signals with different amplitudes, and determining the anti-interference performance of the high-frequency partial discharge detector to be detected according to the maximum interference signal and the partial discharge signal.
2. The apparatus according to claim 1, wherein the partial discharge signal generating module comprises:
a plate electrode for generating an electric field;
the partial discharge signal generating assembly is in signal connection with the first signal collecting module, arranged in the electric field and used for generating the partial discharge signal based on the electric field.
3. The apparatus according to claim 2, wherein the partial discharge signal generating module further comprises:
the insulating oil cup is provided with a containing cavity, the flat electrode and the partial discharge signal generating assembly are arranged in the containing cavity, and the insulating oil cup is used for isolating air.
4. The apparatus according to claim 1, wherein the interference signal generating module comprises:
a cable termination assembly for generating an initial interference signal;
and the signal amplification assembly is electrically connected with the cable terminal assembly and is used for amplifying the initial interference signals by different times to obtain the interference signals with different amplitudes.
5. The apparatus according to claim 1, further comprising:
the third signal acquisition module is in signal connection with the partial discharge signal generation module and the interference signal generation module and is used for acquiring a mixed signal formed by the partial discharge signal and the interference signal, and the high-frequency partial discharge detector to be detected is used for detecting the partial discharge signal in the mixed signal.
6. The apparatus according to claim 1, wherein the signal processing module is specifically configured to determine an interference rejection of the high-frequency partial discharge detector to be detected according to the maximum amplitude of the maximum interference signal and the maximum amplitude of the partial discharge signal, so as to determine the interference rejection of the high-frequency partial discharge detector to be detected.
7. The apparatus according to claim 1, further comprising:
the power supply module is electrically connected with the partial discharge signal generating module and the signal processing module;
the transformer is electrically connected between the power supply module and the partial discharge signal generation module and between the power supply module and the signal processing module, and is used for adjusting the voltage of the power supply provided by the power supply module to the partial discharge signal generation module and the signal processing module.
8. The apparatus according to claim 1, wherein the first signal acquisition module and the second signal acquisition module are high-frequency current transformers.
9. A method for detecting the anti-interference performance of a high-frequency partial discharge detector to be detected by using the anti-interference performance detection apparatus of the high-frequency partial discharge detector according to any one of claims 1 to 8, comprising:
generating a partial discharge signal through the partial discharge signal generating module, and acquiring the partial discharge signal through the first signal acquisition module;
generating interference signals with different amplitudes through the interference signal generating module;
detecting the partial discharge signals under the interference of the interference signals with different amplitudes by the high-frequency partial discharge detector to be detected to obtain a detection result;
the signal processing module determines the maximum interference signal which can be resisted by the high-frequency partial discharge detector to be detected according to the detection result, acquires the maximum interference signal through the second signal acquisition module, and determines the anti-interference performance of the high-frequency partial discharge detector to be detected according to the partial discharge signal and the maximum interference signal.
10. The method according to claim 9, wherein the determining, by the signal processing module, the anti-interference performance of the high-frequency partial discharge detector to be detected according to the partial discharge signal and the maximum interference signal includes:
determining the anti-interference degree of the high-frequency partial discharge detector to be detected according to the ratio of the maximum amplitude of the maximum interference signal to the maximum amplitude of the partial discharge signal;
and determining the anti-interference performance of the high-frequency partial discharge detector to be detected according to the anti-interference degree.
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Application publication date: 20200929 |