Pressure test abnormality positioning analysis method, device, system and equipment

Abstract

The application relates to a withstand voltage test abnormality positioning analysis method, device, system and equipment. The method comprises the following steps: acquiring a sound signal and a visible light image of a region where a test equipment is located under the condition that the voltage of the test equipment rises to and is maintained at a preset test high voltage; identifying whether the sound signal has an abnormal signal to obtain a first discharge detection result; comparing the visible light image with a preset reference image, and detecting whether there is a glow signal in the region where the test equipment is located to obtain an image comparison result and a glow signal detection result; judging whether there is abnormal discharge based on the image comparison result and the glow signal detection result to obtain a second discharge detection result; and positioning an abnormal discharge point according to the first discharge detection result and the second discharge detection result under the condition that the first discharge detection result and the second discharge detection result represent that there is abnormal discharge. The method is favorable for improving the accuracy of abnormal discharge point positioning.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical engineering, in particular to a withstand voltage test abnormality positioning analysis method, device, system and equipment. BACKGROUND

[0002] In the withstand voltage test of AC / DC primary equipment such as converter transformer, coupling transformer, GIS (Gas Insulated Switchgear, gas insulated metal enclosed switchgear) / GIL (Gas Insulated Transmission Lines, gas insulated metal enclosed transmission line), DC wall bushing, etc. in an ultra-high voltage and extra-high voltage converter station, abnormal situations such as lead tip discharge, AC / DC voltage boosting equipment or test object discharge, and metal suspension discharge often occur during the test due to insufficient insulation distance, improper wiring, near electric field metal suspension, test object defects, etc., resulting in interruption of the test.

[0003] At present, the main way to troubleshoot abnormal discharge of leads and test circuits during AC / DC withstand voltage test is to manually observe and listen to the sound to determine the position by the naked eye of the tester. This method requires high experience, technology and skill of the tester, and the withstand voltage test is carried out when the equipment is installed and in the running position. The test is affected by the large area occupied by the equipment, the high height of the equipment, the spatial partition of the equipment, and the narrow test space, etc. The tester often has sensory limitations and monitoring deficiencies during the test. In the AC / DC withstand voltage test, the tester needs to reproduce the abnormality several times through voltage boosting to finally find the abnormal point. Therefore, there is a problem of inaccurate positioning of abnormal discharge in the withstand voltage test. SUMMARY

[0004] Therefore, it is necessary to provide a withstand voltage test abnormality positioning analysis method, device, system, computer equipment, computer readable storage medium and computer program product capable of improving the accuracy of positioning abnormal discharge points in the withstand voltage test.

[0005] In a first aspect, the present application provides a withstand voltage test abnormality positioning analysis method, comprising:

[0006] In the case where the voltage of the test equipment rises to and maintains at a preset test high voltage, the sound signal and the visible light image of the area where the test equipment is located are acquired;

[0007] The first discharge detection result is obtained by identifying whether the sound signal has an abnormal signal;

[0008] The visible light image is compared with a preset reference image, and whether there is a glow signal in a region where the test equipment is located is detected, to obtain an image comparison result and a glow signal detection result;

[0009] Based on the image comparison result and the glow signal detection result, it is determined whether there is abnormal discharge, to obtain a second discharge detection result;

[0010] In a case where the first discharge detection result and the second discharge detection result represent that there is abnormal discharge, the abnormal discharge point is located according to the first discharge detection result and the second discharge detection result.

[0011] In one of the embodiments, locating the abnormal discharge point according to the first discharge detection result and the second discharge detection result includes:

[0012] From the first discharge detection result and the second discharge detection result, target first discharge detection results and target second discharge detection results with the same abnormal discharge time are screened out;

[0013] If the abnormal discharge types of the target first discharge detection results and the target second discharge detection results are consistent, the abnormal discharge point is located based on the target first discharge detection results and the target second discharge detection results;

[0014] If the abnormal discharge types of the target first discharge detection results and the target second discharge detection results are inconsistent, the abnormal discharge point is located based on the target second discharge detection results.

[0015] In one of the embodiments, the sound signal includes an audible sound signal and an ultrasonic signal, and identifying whether the sound signal has an abnormal signal to obtain the first discharge detection result includes:

[0016] The audible sound signal and the ultrasonic signal are denoised by using reference audible sound signals and reference ultrasonic signals, and the reference audible sound signals and the reference ultrasonic signals are obtained when the voltage of the test equipment is at a preset reference voltage;

[0017] In a case where the abnormal signal exists in at least one of the denoised audible sound signal and the ultrasonic signal, the abnormal discharge type of the abnormal signal is determined based on a preset abnormal discharge signal analysis strategy;

[0018] Based on the abnormal signal, the abnormal discharge position is determined, and the first discharge detection result includes the abnormal discharge time, the abnormal discharge type, and the abnormal discharge position of the abnormal signal.

[0019] In one of the embodiments, determining the abnormal discharge type of the abnormal signal based on the preset abnormal discharge signal analysis strategy includes:

[0020] In the case that the audible signal and the ultrasonic signal coexist with the steep wave signal, the abnormal discharge type of the abnormal signal is determined as gap discharge or surface discharge;

[0021] In the case that the audible signal does not exist, and the ultrasonic signal exists with the periodic abnormal signal, the abnormal discharge type of the abnormal signal is determined as corona discharge;

[0022] In the case that the audible signal exists with the periodic abnormal signal, and the ultrasonic signal does not exist with the abnormal signal, the abnormal discharge type of the abnormal signal is determined as suspension discharge.

[0023] In one of the embodiments, the second discharge detection result is obtained by judging whether the abnormal discharge exists based on the image comparison result and the glow signal detection result, and the second discharge detection result comprises:

[0024] In the case that the glow signal detection result indicates that the glow signal exists, and the image comparison result indicates that the similarity between the visible light image and the reference image is higher than the preset similarity threshold, the abnormal discharge type of the visible light image is determined as corona discharge;

[0025] In the case that the glow signal detection result indicates that the glow signal does not exist, and the image comparison result indicates that the similarity between the visible light image and the reference image is lower than the preset similarity threshold, the abnormal discharge type of the visible light image is determined as suspension discharge;

[0026] In the case that the glow signal detection result indicates that the glow signal exists, and the image comparison result indicates that the similarity between the visible light image and the reference image is lower than the preset similarity threshold, the abnormal discharge type of the visible light image is determined as gap discharge or surface discharge, and the second discharge detection result comprises the visible light image collected at the time when the glow signal is detected and the abnormal discharge type of the visible light image.

[0027] In one of the embodiments, the withstand voltage test abnormal positioning analysis method further comprises:

[0028] In the case that the voltage of the test equipment is at the preset reference voltage, it is detected whether the glow signal exists in the area where the test equipment is located, and the glow signal detection result is obtained;

[0029] In the case that the glow signal detection result indicates that the glow signal exists, the target visible light image collected at the time when the glow signal is detected is acquired, and the target visible light image is determined as the abnormal image;

[0030] Based on the abnormal image, the alarm information is generated, and the alarm information is pushed.

[0031] In a second aspect, the application further provides a withstand voltage test abnormal positioning analysis device, comprising:

[0032] The data acquisition module is configured to acquire a sound signal and a visible light image of a region where the test device is located when a voltage of the test device rises to and is maintained at a preset test high voltage.

[0033] The first discharge detection module is configured to identify whether the sound signal has an abnormal signal and obtain a first discharge detection result.

[0034] The second discharge detection module is configured to compare the visible light image with a preset reference image, detect whether a glow signal exists in the region where the test device is located, obtain an image comparison result and a glow signal detection result, determine whether abnormal discharge exists based on the image comparison result and the glow signal detection result, and obtain a second discharge detection result.

[0035] The abnormal positioning analysis module is configured to, when the first discharge detection result and the second discharge detection result represent that abnormal discharge exists, position an abnormal discharge point according to the first discharge detection result and the second discharge detection result.

[0036] In a third aspect, the present application further provides an abnormal positioning analysis system for a withstand voltage test, comprising a controller, an acoustic recognition system and an image recognition system, wherein the acoustic recognition system and the image recognition system are in communication connection with the controller.

[0037] The acoustic recognition system is configured to, when a voltage of the test device rises to and is maintained at a preset test high voltage, collect a sound signal of a region where the test device is located, identify whether the sound signal has an abnormal signal, obtain a first discharge detection result, and send the first discharge detection result to the controller.

[0038] The image recognition system is configured to, when a voltage of the test device rises to and is maintained at a preset test high voltage, collect a visible light image of a region where the test device is located, compare the visible light image with a preset reference image, detect whether a glow signal exists in the region where the test device is located, obtain an image comparison result and a glow signal detection result, determine whether abnormal discharge exists based on the image comparison result and the glow signal detection result, obtain a second discharge detection result, and send the second discharge detection result to the controller.

[0039] The controller is configured to receive the first discharge detection result and the second discharge detection result, and, when the first discharge detection result and the second discharge detection result represent that abnormal discharge exists, position an abnormal discharge point according to the first discharge detection result and the second discharge detection result.

[0040] In one of the embodiments, the acoustic identification system is further configured to perform noise reduction on the audible sound signal and the ultrasonic signal based on a reference audible sound signal and a reference ultrasonic signal, the reference audible sound signal and the reference ultrasonic signal being collected when the voltage of the test device is at a preset reference voltage, and in a case where at least one of the noise-reduced audible sound signal and the noise-reduced ultrasonic signal contains an abnormal signal, determining an abnormal discharge type of the abnormal signal based on a preset abnormal discharge signal analysis strategy, determining an abnormal discharge position based on the abnormal signal, and the first discharge detection result including an abnormal discharge time, the abnormal discharge type, and the abnormal discharge position.

[0041] In one of the embodiments, the controller is further configured to, in a case where the first discharge detection result and the second discharge detection result indicate that there is abnormal discharge, generate an abnormal discharge event report based on the first discharge detection result and the second discharge detection result, the abnormal discharge event report including the abnormal discharge time, the abnormal discharge type, and the abnormal discharge position.

[0042] In a fourth aspect, the present application further provides a computer device, including a memory and a processor, the memory stores a computer program, and the processor implements the steps in any one of the above-mentioned dielectric voltage test abnormal positioning analysis method embodiments when executing the computer program.

[0043] In a fifth aspect, the present application further provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the steps in any one of the above-mentioned dielectric voltage test abnormal positioning analysis method embodiments.

[0044] In a sixth aspect, the present application further provides a computer program product, including a computer program, and the computer program is executed by a processor to implement the steps in any one of the above-mentioned dielectric voltage test abnormal positioning analysis method embodiments.

[0045] The pressure test abnormality positioning analysis method, device, system, computer device, computer readable storage medium and computer program product have the advantages that, compared with the traditional way of relying on the experience, technology, manual observation and sound listening of test personnel to troubleshoot abnormal discharge in the lead wire and test loop during the pressure test, the way of image capture comparison, glow signal detection, sound signal acquisition and abnormal signal detection of the test equipment is used to automatically troubleshoot and position the abnormality in the pressure test from multiple dimensions, the abnormal discharge condition is preliminarily positioned, the first discharge detection result and the second discharge detection result are obtained, and the abnormal discharge condition existing in the test equipment area is determined according to the first discharge detection result and the second discharge detection result, so that the possibility of misjudgment of abnormal positioning is reduced, the abnormal discharge occurring in the pressure test can be captured, the positioning of the abnormal discharge point is realized, compared with the way of manually troubleshooting and positioning the abnormal discharge point, the accuracy of the abnormal discharge positioning of the super / ultra-high voltage AC / DC equipment pressure test is improved. In addition, the possibility of abnormal positioning by multiple boosting and reproducing of abnormality is reduced, and the efficiency of abnormal positioning is improved. Further, it is beneficial for the test personnel to check the insulation quality of the test equipment and the wire and cable through the abnormal discharge point, to evaluate the withstand capability of the test equipment and the wire and cable, to maintain and adjust, and to improve the stability and safety of the power system. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed to be used in the description of the embodiments of the present application or the related art will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other related drawings can be obtained by those skilled in the art without creative labor.

[0047] Figure 1 An application environment diagram of the pressure test abnormality positioning analysis method in an embodiment;

[0048] Figure 2 A flowchart of the pressure test abnormality positioning analysis method in an embodiment;

[0049] Figure 3 A flowchart of the pressure test abnormality positioning analysis method in another embodiment;

[0050] Figure 4 A flowchart of the pressure test abnormality positioning analysis method in another embodiment;

[0051] Figure 5 A flowchart of the pressure test abnormality positioning analysis method in another embodiment;

[0052] Figure 6 a structure block diagram of the abnormality positioning analysis device for pressure test in one embodiment;

[0053] Figure 7 a structure block diagram of the abnormality positioning analysis system for pressure test in one embodiment;

[0054] Figure 8 an internal structure diagram of the computer device in one embodiment. DETAILED DESCRIPTION

[0055] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application is further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0056] The abnormality positioning analysis method for pressure test provided by the embodiments of the present application can be applied in the application environment as shown in the figure. Figure 1 The data providing end 102 communicates with the control end 104 through the network. The data storage system can store the data required to be processed by the control end 104. The data storage system can be integrated on the control end 104, or placed on the cloud or other network servers.

[0057] Specifically, the operator can upload the collected sound signal and visible light image to the control end 104 through the data providing end 102, and then send the pressure test abnormality positioning analysis message to the control end 104 through the data providing end 102. The control end 104 acquires the sound signal and visible light image. Secondly, in the case that the abnormal signal exists in the sound signal, the first discharge detection result is obtained based on the abnormal signal. Then, the visible light image is compared with the preset reference image, and it is detected whether there is a glow signal in the area where the test equipment is located, to obtain the abnormal image detection result and the glow signal detection result. The existence of abnormal discharge is judged based on the abnormal image detection result and the glow signal detection result, to obtain the second discharge detection result. Finally, the abnormal discharge point is positioned according to the first discharge detection result and the second discharge detection result.

[0058] The data providing end 102 can be various terminals in a power system, various personal computers, notebook computers, smart phones, tablet computers, Internet of Things devices, and portable wearable devices, but is not limited thereto. The Internet of Things device can be a smart speaker, a smart television, a smart air conditioner, a smart vehicle-mounted device, a projection device, etc. The portable wearable device can be a smart watch, a smart bracelet, a head-mounted device, etc. The head-mounted device can be a virtual reality (VR) device, an augmented reality (AR) device, smart glasses, etc. The control end 104 can be a physical server, a server cluster or a distributed system composed of multiple physical servers, or a cloud server providing cloud computing services.

[0059] In an exemplary embodiment, as shown in Figure 2 , a withstand voltage test abnormality positioning analysis method is provided. The method is described by taking the control end 104 in Figure 1 as an example, which includes the following S100 to S500. Wherein:

[0060] S100, in the case that the voltage of the test equipment rises to and maintains at a preset test high voltage, the sound signal and the visible light image of the area where the test equipment is located are acquired.

[0061] The test equipment can include AC and DC primary equipment in an ultrahigh-voltage and extra-high-voltage converter station, such as transformers, converter valves, and DC voltage dividers, etc. The preset test high voltage is determined according to the withstand voltage test requirement, which can be 300kv (kilo-volt), 500kv, or 900kv, etc. The control of the voltage of the test equipment can be performed by a high-voltage test booster. The high-voltage test booster is mainly used to generate and control the required high voltage to perform the withstand voltage test on the electrical equipment. The type of the high-voltage test booster can be selected according to the type of the power source (AC or DC) used, the characteristics of the test equipment, the test requirements, the site conditions, and other specific requirements. The high-voltage test booster can include a test transformer, a DC high-voltage generator, and an impulse voltage generator, etc.

[0062] The sound signal can include but is not limited to audible sound signals, ultrasonic signals, and infrasonic signals, etc. The sound signal can be acquired by a sound sensor, wherein the sound sensor includes but is not limited to and , etc. The visible light image can be acquired by an image acquisition device.

[0063] In practical applications, a plurality of sound sensors and image acquisition devices can be arranged in the area of the test device in advance to cover the area where the test device is located. Then, when the test device is controlled to rise from the current voltage to the preset test high voltage (e.g., 500 kv) by the high-voltage test booster, and according to the preset withstand test dwell time, the test device is maintained at the test high voltage, the sound signals and visible light images in the area where the test device is located are acquired by the sound acquisition sensor and the image acquisition device. The preset withstand test dwell time is determined according to the type of the test device and the test requirements. For example, the withstand test dwell time of the alternating current primary device can be 1 minute or 5 minutes, the withstand test dwell time of the direct current primary device can be 30 minutes or 1 hour, etc.

[0064] S200, identifying whether the sound signal has an abnormal signal, and obtaining a first discharge detection result.

[0065] The first discharge detection result is used to represent whether the area where the test device is located has an abnormal discharge. The first discharge detection result can include no abnormal discharge and abnormal discharge information. The abnormal discharge information can include the sound signal, signal amplitude, signal validity, abnormal discharge time, and abnormal discharge type collected when the abnormal discharge occurs.

[0066] In practical applications, whether the sound signal has an abnormal signal can be identified by a preset abnormal signal detection rule. For example, a standard sound signal is obtained, and the collected sound signal is compared with the standard sound signal to detect whether there is noise, distortion, or uneven volume to identify whether the sound signal has an abnormal signal. If the sound signal has an abnormal signal, it indicates that there may be an abnormal discharge. The abnormal signal can be obtained, the abnormal discharge type can be determined by analyzing the signal characteristics of the abnormal signal, and the first discharge detection result can be obtained. If the sound signal does not have an abnormal signal, it indicates that there is no abnormal discharge, and the first discharge detection result is obtained.

[0067] S300, comparing the visible light image with a preset reference image, and detecting whether there is a glow signal in the area where the test device is located, to obtain an image comparison result and a glow signal detection result.

[0068] The preset reference image can be a visible light image of the area where the test device is located obtained before the withstand test starts. The glow refers to the weak light generated by the discharge phenomenon of the gas or insulating material around the test device in the high-voltage environment. The glow signal can be detected by an ultrasonic sensor, an ultraviolet device, etc. The glow signal detection result can include no glow signal and a glow signal.

[0069] The comparison of the visible light image and the reference image can be performed by pixel value comparison or hash algorithm, combined with a preset similarity threshold, to obtain an image comparison result. The image comparison result can include image similarity and image difference. The preset similarity threshold is determined according to the experimental scene and requirements, for example, the similarity threshold can be set to 90%.

[0070] In actual application, when the voltage of the test equipment rises to and maintains at a preset test high voltage, the visible light image of the area where the test equipment is located can be continuously acquired, and the visible light image is compared with the reference image by pixel value comparison, and at the same time, it is continuously detected by the ultraviolet device whether there is a glow signal in the area where the test equipment is located, to obtain the image comparison result and the glow signal detection result.

[0071] S400, based on the image comparison result and the glow signal detection result, it is judged whether there is abnormal discharge, and a second discharge detection result is obtained.

[0072] The abnormal discharge can be a lead tip discharge, an AC / DC voltage boosting device or test equipment discharge, metal floating discharge and other types of abnormal discharge in the withstand voltage test. In some abnormal discharge situations, obvious visible light (such as arc discharge or spark discharge) may be generated, or relatively weak light may be generated. The second discharge detection result is used to represent whether there is an abnormal discharge situation in the area where the test equipment is located. The second discharge detection result can include no abnormal discharge and abnormal discharge information, and the abnormal discharge information can include the visible light image collected at the time of abnormal discharge, the abnormal discharge time and the abnormal discharge type, etc.

[0073] In actual application, the abnormal discharge image analysis strategy can be set in advance according to the characteristics and intensity of light caused by different types of abnormal discharge. For example, under corona discharge, weak glow may be generated; under floating discharge, visible light with high light intensity may be generated, etc. The abnormal discharge image analysis strategy is set. Thus, combined with the abnormal discharge image analysis strategy, the image comparison result of the visible light and the glow signal detection result, it is judged whether there is an abnormal discharge situation in the area where the test equipment is located, to obtain the second discharge detection result.

[0074] S500, in the case that the first discharge detection result and the second discharge detection result represent that there is an abnormal discharge situation, the abnormal discharge point is located according to the first discharge detection result and the second discharge detection result.

[0075] In practical applications, when the first and second discharge detection results indicate an abnormal discharge in the area where the test equipment is located, the abnormal discharge point can be located using the abnormal discharge information in the first and second discharge detection results. Specifically, the same abnormal discharge situation can be captured based on the abnormal discharge time in the first and second discharge detection results. Based on the abnormal sound signal and visible light image in the first and second discharge detection results, the abnormal discharge point can be located using a sound source localization method and the location of the image acquisition device corresponding to the visible light image.

[0076] The aforementioned anomaly location analysis method for withstand voltage tests differs from traditional methods that rely on the experience, skills, manual observation, and auditory localization of personnel to identify abnormal discharges in leads and test circuits during withstand voltage tests. Instead, it automatically identifies and locates anomalies from multiple dimensions by performing image capture and comparison, glow signal detection, sound signal acquisition, and anomaly signal detection on the test equipment. This initial location of abnormal discharges yields first and second discharge detection results. Further analysis of these results confirms the presence of abnormal discharges in specific areas of the test equipment, reducing the possibility of misjudgment. This method can capture transient abnormal discharges during withstand voltage tests, enabling precise location of the discharge point. Compared to manual identification and location of abnormal discharges, this method improves the accuracy of anomaly location in withstand voltage tests of ultra-high voltage AC / DC equipment. Furthermore, the multi-dimensional automatic anomaly identification and location method reduces the need for repeated voltage increases to reproduce the anomaly, thus improving the efficiency of anomaly location. Furthermore, it allows test personnel to inspect the insulation quality of test equipment and wires and cables through abnormal discharge points, assess the withstand capability of the test equipment and wires and cables, and carry out maintenance and adjustments, thereby improving the stability and safety of the power system.

[0077] To improve the accuracy of locating abnormal discharge points, in one exemplary embodiment, such as Figure 3 As shown, S500 includes S520 to S560. Wherein:

[0078] S520: Select the target first discharge detection result and the target second discharge detection result with the same abnormal discharge time from the first discharge detection result and the second discharge detection result.

[0079] The first discharge detection result and the second discharge detection result include the abnormal discharge time and the abnormal discharge type.

[0080] In practical applications, the first discharge detection result with the same abnormal discharge time as the abnormal discharge time in the second discharge detection result can be matched according to the abnormal discharge time in the second discharge detection result, and the matched first discharge detection result and the second discharge detection result are determined as the target first discharge detection result and the target second discharge detection result.

[0081] In S540, if the abnormal discharge types of the target first discharge detection result and the target second discharge detection result are consistent, the abnormal discharge point is located based on the target first discharge detection result and the target second discharge detection result.

[0082] In practical applications, if the abnormal discharge types of the target first discharge detection result and the target second discharge detection result are consistent, indicating that there is an abnormal discharge situation in the area where the test equipment is located, the abnormal discharge information in the target first discharge detection result and the target second discharge detection result is adopted to locate the abnormal discharge point. Specifically, the abnormal discharge point can be located by sound source positioning technology according to the abnormal sound signal in the first discharge detection result, and the position information of the sound source of the abnormal sound signal is obtained by using the time delay and intensity difference of the abnormal sound signal reaching the sound collection device and combining the visible light image in the target second discharge detection result.

[0083] In S560, if the abnormal discharge types of the target first discharge detection result and the target second discharge detection result are inconsistent, the abnormal discharge point is located based on the target second discharge detection result.

[0084] In practical applications, if the abnormal discharge types of the target first discharge detection result and the target second discharge detection result are inconsistent, indicating that there may be noise interference in the area where the test equipment is located, resulting in inaccurate abnormal discharge types in the target first discharge detection result, the information in the target second discharge detection result is adopted to locate the abnormal discharge point. Specifically, the abnormal discharge point can be located by the position of the image collection device corresponding to the visible light image in the target second discharge detection result.

[0085] In this embodiment, by comparing the abnormal discharge time and the abnormal discharge type in the first and second discharge detection results, it is determined whether to locate the abnormal discharge point based on the first discharge detection result and the second discharge detection result or to locate the abnormal discharge point based on the second discharge detection result, thereby reducing the possibility of abnormal positioning error and improving the accuracy of abnormal discharge positioning.

[0086] The sound signal includes audible sound signal and ultrasonic signal. In an exemplary embodiment, as shown in FIG. 2, S200 includes S220-S260. Wherein: Figure 4

[0087] ​S220, denoising the audible sound signal and the ultrasonic signal based on the reference audible sound signal and the reference ultrasonic signal, wherein the reference audible sound signal and the reference ultrasonic signal are collected when the voltage of the test equipment is at the preset reference voltage.

[0088] The preset reference voltage can be a voltage of the test equipment under which abnormal discharge is less likely to occur in a region where the test equipment is located. The reference voltage can be determined according to the type of withstand voltage test and test experience. For example, the reference voltage is set to 100 kv. It can be understood that, in addition to 100 kv, the reference voltage can also be 120 kv or 150 kv in other embodiments, which is not limited herein.

[0089] In actual application, the test equipment can be controlled to be at the preset reference voltage by the high-voltage test booster in advance, and the reference audible sound signal and the reference ultrasonic signal can be collected by the sound collection sensor, and then the reference audible sound signal and the reference ultrasonic signal can be denoised by a denoising algorithm. Specifically, the reference audible sound signal and the reference ultrasonic signal are denoised by using a wavelet denoising algorithm based on a preset noise threshold, so that the noise level of the reference audible sound signal and the reference ultrasonic signal is less than the preset noise threshold. The preset noise threshold can be set according to the test environment and test requirements, for example, 10 decibels. The denoised reference audible sound signal and the reference ultrasonic signal are used to denoise the obtained audible sound signal and ultrasonic signal.

[0090] S240, in a case where the abnormal signal exists in at least one of the denoised audible sound signal and the ultrasonic signal, determining an abnormal discharge type of the abnormal signal based on a preset abnormal discharge signal analysis strategy.

[0091] The abnormal signal is used to represent a sound signal caused by abnormal discharge. The detection of the abnormal signal in the audible sound signal and the ultrasonic signal can be performed by comparing the frequency domain difference between the reference audible sound signal and the audible sound signal, and the frequency domain difference between the reference ultrasonic signal and the ultrasonic signal, respectively, and determining that the abnormal signal exists if the frequency domain difference exceeds a preset frequency domain difference threshold.

[0092] The abnormal discharge signal analysis strategy can be set by analyzing the frequency and signal characteristics of the sound signal caused by different abnormal discharge types. The abnormal discharge signal analysis strategy can include signal characteristics of the audible sound signal and the ultrasonic signal caused by multiple different abnormal discharge types. For example, the characteristics of the sound signal corresponding to corona discharge can be continuous high-frequency range sound signal (ultrasonic signal), and the characteristics of the sound signal corresponding to gap discharge can be short and discontinuous wide-band sound signal (audible sound signal and ultrasonic signal).

[0093] In actual application, it is determined whether the abnormal signal exceeding the noise threshold exists in the de-noised audible sound signal and / or ultrasonic signal through the preset frequency domain difference threshold. In the case that the abnormal signal exists in at least one of the de-noised audible sound signal and ultrasonic signal, the abnormal signal is extracted, the characteristics of the abnormal signal are analyzed, and the abnormal discharge type corresponding to the abnormal signal is determined according to the preset abnormal discharge signal analysis strategy.

[0094] S260, based on the abnormal signal, the abnormal discharge position is determined, and the first discharge detection result includes the abnormal discharge time, the abnormal discharge type and the abnormal discharge position of the abnormal signal.

[0095] In actual application, the three-dimensional coordinates of the sound source of the abnormal signal can be measured by the acoustic acquisition sensor and the positioning module of the multiple acoustic acquisition devices deployed in the area where the test equipment is located through the trilateration method to obtain the abnormal discharge position. The occurrence time of the abnormal signal is determined as the abnormal discharge time. The first discharge detection result is obtained through the abnormal discharge time, the abnormal discharge type and the abnormal discharge position of the abnormal signal.

[0096] In this embodiment, on the one hand, the audible sound signal and the ultrasonic signal are detected for abnormal signals respectively, and in the case that the abnormal signal is detected, the first discharge detection result is obtained through the preset abnormal discharge signal analysis strategy and abnormal discharge position positioning method, which improves the accuracy of the first discharge detection result. On the other hand, the quality of the acoustic signal is improved by de-noising the collected audible sound signal and ultrasonic signal, so as to reduce the possibility of misjudgment when the audible sound signal and ultrasonic signal are detected for abnormal signals, which is conducive to improving the accuracy of abnormal discharge analysis based on the audible sound signal and ultrasonic signal.

[0097] The abnormal discharge type of the abnormal signal is determined through the preset abnormal discharge signal analysis strategy. In an exemplary embodiment, S240 includes S242 to S246. Wherein:

[0098] S242, in the case that the steep wave signal exists in the audible sound signal and ultrasonic signal at the same time, the abnormal discharge type of the abnormal signal is determined as gap discharge or surface discharge.

[0099] Wherein, the steep wave signal can be a signal with a large slope or change rate in the rising or falling process. Whether the abnormal signal is a steep wave signal can be determined by time domain analysis or frequency domain analysis. Gap discharge refers to a discharge phenomenon occurring in the gap (air gap) between different insulation layers or inside the insulation material. Surface discharge refers to a discharge phenomenon occurring on the surface of the insulation material or along the surface of the solid insulation.

[0100] In actual application, in the case that abnormal signals exist in audible sound signals and ultrasonic signals simultaneously, and the abnormal signals are determined to be abrupt wave signals through time domain analysis method, it is determined that the abnormal discharge type of the abnormal signals is gap discharge or surface discharge.

[0101] S244, in the case that abnormal signals do not exist in audible sound signals, and periodic abnormal signals exist in ultrasonic signals, it is determined that the abnormal discharge type of the abnormal signals is corona discharge.

[0102] The periodic abnormal signals can be signals that repeatedly appear within a certain time interval. The periodic abnormal signals can be identified by The algorithm identifies periodic abnormal signals in abnormal signals. Corona discharge is a partial discharge phenomenon that occurs on the surface of a test device (such as an insulator, a cable, a transformer, etc.) under high voltage.

[0103] In actual application, in the case that abnormal signals do not exist in audible sound signals, and abnormal signals exist in ultrasonic signals, and the abnormal signals are identified to be periodic abnormal signals through Fourier transform algorithm, it is determined that the abnormal discharge type of the abnormal signals is corona discharge.

[0104] S246, in the case that periodic abnormal signals exist in audible sound signals, and abnormal signals do not exist in ultrasonic signals, it is determined that the abnormal discharge type of the abnormal signals is suspension discharge.

[0105] The suspension discharge refers to an ionization phenomenon that occurs at the contact interface between a gas and a solid material due to an electric field strength exceeding the breakdown electric field strength.

[0106] In actual application, in the case that abnormal signals exist in audible sound signals, the abnormal signals are identified to be periodic abnormal signals through Fourier transform algorithm, and abnormal signals do not exist in ultrasonic signals, it is determined that the abnormal discharge type of the abnormal signals is suspension discharge.

[0107] In other embodiments, in the case that abnormal signals exist in audible sound signals, but the abnormal signals do not have periodic repetition, and abnormal signals do not exist in ultrasonic signals, it is determined that the abnormal signals are interference signals. In the case that the abnormal signals are determined to be interference signals, it is not necessary to locate the sound source of the interference signals.

[0108] In the embodiment, the abnormal discharge signal analysis strategy preset according to different abnormal discharge characteristics is used to analyze the abnormal discharge type corresponding to the abnormal signals in audible sound signals and / or ultrasonic signals, thereby improving the accuracy of troubleshooting abnormal discharge types in voltage withstand test.

[0109] In the case that the first discharge detection result and the second discharge detection result represent that abnormal discharge exists, in one exemplary embodiment, as Figure 5As shown, S400 includes S420 to S460. Among them:

[0110] S420, in the case that the glow signal detection result represents that there is a glow signal, and the image comparison result represents that the similarity between the visible light image and the reference image is higher than the preset similarity threshold, it is determined that the abnormal discharge type of the visible light image is corona discharge.

[0111] In actual application, in the case that the glow signal detection result represents that there is a glow signal in the area where the test equipment is located, and the similarity between the visible light image collected by the image collection device and the reference image is higher than the preset similarity threshold, it is indicated that there is no visible light caused by abnormal discharge in the visible light image, and it is determined that the abnormal discharge type causing the glow signal is corona discharge.

[0112] S440, in the case that the glow signal detection result represents that there is no glow signal, and the image comparison result represents that the similarity between the visible light image and the reference image is lower than the preset similarity threshold, it is determined that the abnormal discharge type of the visible light image is floating discharge.

[0113] In actual application, in the case that the glow signal detection result represents that there is no glow signal in the area where the test equipment is located, and the similarity between the visible light image collected by the image collection device and the reference image is lower than the preset similarity threshold, it is indicated that there is visible light caused by abnormal discharge in the visible light image, and it is determined that the abnormal discharge type causing the visible light is floating discharge.

[0114] S460, in the case that the glow signal detection result represents that there is a glow signal, and the image comparison result represents that the similarity between the visible light image and the reference image is lower than the preset similarity threshold, it is determined that the abnormal discharge type of the visible light image is gap discharge or surface discharge, and the second discharge detection result includes the visible light image collected at the moment when the glow signal is detected, and the abnormal discharge type of the visible light image.

[0115] In actual application, in the case that the glow signal detection result represents that there is a glow signal in the area where the test equipment is located, and the similarity between the visible light image collected by the image collection device and the reference image is lower than the preset similarity threshold, it is indicated that there is visible light caused by abnormal discharge in the visible light image, and it is determined that the abnormal discharge type is gap discharge or surface discharge.

[0116] In this embodiment, the discharge type of the abnormal discharge existing in the area where the test equipment is located is analyzed by combining the glow signal detection result and detecting whether there is visible light caused by abnormal discharge through the image comparison result of the visible light image and the reference image, which improves the accuracy of troubleshooting abnormal discharge types in pressure test.

[0117] To improve the accuracy of locating the abnormal discharge point through the image comparison result, in an exemplary embodiment, the withstand voltage test abnormal positioning analysis method further comprises S620 to S660. Among them:

[0118] S620, in the case that the voltage of the test equipment is at a preset reference voltage, detecting whether there is a glow signal in the area where the test equipment is located to obtain a glow signal detection result.

[0119] S640, in the case that the glow signal detection result represents the existence of a glow signal, obtaining a target visible light image collected at the moment when the glow signal is detected, and determining the target visible light image as an abnormal image.

[0120] S660, generating an alarm information based on the abnormal image, and pushing the alarm information.

[0121] To improve the accuracy of detecting abnormal discharge and locating abnormal discharge point through visible light image, the voltage of the test equipment can be controlled to be at a preset reference voltage before the voltage of the test equipment rises to the test high voltage, and the glow signal detection can be performed. If a glow signal is detected at the reference voltage, it indicates that there is a poor contact in the test circuit or a safety distance problem between the test equipment, and an alarm information needs to be pushed to prompt the relevant experimenters to reduce the voltage of the test equipment to zero, and adjust the test circuit and the distance between the test equipment according to the abnormal situation.

[0122] In actual application, first, the voltage of the test equipment is controlled to be at a preset reference voltage by the high voltage test booster, and whether there is a glow signal in the area where the test equipment is located is detected by the ultraviolet device to obtain a glow signal detection result. The glow signal detection result includes the existence of a glow signal and no glow signal.

[0123] After obtaining the glow signal detection result, the target visible light image collected at the moment when the glow signal is detected is extracted, and the target visible light image is determined as an abnormal image.

[0124] After obtaining the abnormal image, the moment when the glow signal is detected is determined as an abnormal moment, and an alarm information is generated based on the abnormal moment and the abnormal image, and the alarm information is pushed to prompt the relevant experimenters to make adjustments. The method of pushing the alarm information can include pushing the alarm information in the notification bar of the controller display, displaying the alarm information in the form of full screen or half screen pop-up window. It can also be based on this to give a specific sound or vibration mode for auditory form of alarm prompt, and a visual form of alarm prompt through the flicker of the indicator light. It can be understood that the method of pushing the alarm information can be a combination of the aforementioned method of pushing the alarm information and any one of the aforementioned alarm prompt methods or any multiple alarm prompt methods, which is not limited here.

[0125] In the embodiment, the glow signal detection is performed in advance at the reference voltage, so as to determine whether the accuracy of abnormal discharge elimination and positioning that may affect the withstand voltage test exists, and to timely adjust, so as to reduce the problem that the accuracy of determining the abnormal discharge type and positioning the abnormal discharge point is not high in the withstand voltage test due to the poor contact of the test loop or the insufficient safety distance between the test devices, and to improve the accuracy of determining the abnormal discharge type and positioning the abnormal discharge point. At the same time, the possibility of repeated test is reduced, and the efficiency of positioning the abnormal discharge point is improved.

[0126] In other embodiments, the withstand voltage test abnormal positioning analysis method further includes: obtaining a sound signal of the area where the test device is located in the process that the voltage of the test device decreases from the test high voltage to the reference voltage, identifying whether the sound signal exists abnormal signal, obtaining a third discharge detection result, the sound signal includes audible sound signal and ultrasonic signal. In the embodiment, the third discharge detection result is obtained by identifying whether the sound signal exists abnormal signal. For details, refer to the method for obtaining the first discharge detection result as described above, and the specific process is described in the embodiment above, that is, the audible sound signal and the ultrasonic signal are denoised based on the reference audible sound signal and the reference ultrasonic signal, and in the case that at least one of the denoised audible sound signal and the ultrasonic signal exists abnormal signal, the abnormal discharge type is determined based on the preset abnormal discharge signal analysis strategy, the abnormal discharge time and the abnormal discharge position are determined based on the abnormal signal, and the first discharge detection result is obtained. Here, the details are not repeated.

[0127] In other embodiments, the withstand voltage test abnormal positioning analysis method further includes: obtaining a visible light image of the area where the test device is located in the process that the voltage of the test device decreases from the test high voltage to the reference voltage, comparing the visible light image with a preset reference image to obtain an image comparison result, and determining whether abnormal discharge exists based on the image comparison result to obtain a fourth discharge detection result. In the embodiment, the image comparison result is obtained by comparing the visible light image with the preset reference image. For details, refer to the method for obtaining the image comparison result as described above, and the specific process is described in the embodiment above, that is, the implementation process of S300. Here, the details are not repeated. Specifically, in the case that the image comparison result represents that the similarity between the visible light image and the reference image is lower than the preset similarity threshold, it is determined that the area where the test device is located exists abnormal discharge, and the fourth discharge detection result can include the visible light image lower than the preset similarity threshold, the abnormal discharge time (the collection time of the visible light image); in the case that the image comparison result represents that the similarity between the visible light image and the reference image is higher than the similarity threshold, it is determined that the area where the test device is located does not exist abnormal discharge, and the fourth discharge detection result includes no abnormal discharge.

[0128] In other embodiments, the pressure test abnormality positioning analysis method further comprises: during the process that the voltage of the test equipment decreases from the test high voltage to the reference voltage, determining target third and fourth discharge detection results representing abnormal discharge from the third and fourth discharge detection results. If the abnormal discharge times in the target third and fourth discharge detection results are the same, combining the abnormal discharge information in the target third and fourth discharge detection results to generate abnormal alarm information, and pushing the abnormal alarm information; if the abnormal discharge times in the target third and fourth discharge detection results are different, generating abnormal alarm information according to the abnormal discharge information in the target third and fourth discharge detection results respectively, and pushing the abnormal alarm information.

[0129] In order to make the pressure test abnormality positioning analysis method provided by the present application more clearly, a specific embodiment is described below, which comprises the following steps:

[0130] S1, in the case that the voltage of the test equipment is at a preset reference voltage, detecting whether there is a glow signal in the area where the test equipment is located to obtain a glow signal detection result, in the case that the glow signal detection result represents that there is a glow signal, acquiring a target visible light image collected at the time when the glow signal is detected, determining the target visible light image as an abnormal image, generating alarm information based on the abnormal image, and pushing the alarm information.

[0131] S2, in the case that the voltage of the test equipment rises to and maintains at a preset test high voltage, acquiring a sound signal and a visible light image in the area where the test equipment is located.

[0132] S3, performing denoising processing on the audible sound signal and the ultrasonic wave signal by using a reference audible sound signal and a reference ultrasonic wave signal, the reference audible sound signal and the reference ultrasonic wave signal being collected in the case that the voltage of the test equipment is at a preset reference voltage.

[0133] S4, in the case that there is an abnormal signal in at least one of the denoised audible sound signal and ultrasonic wave signal, in the case that the audible sound signal and the ultrasonic wave signal both have steep wave signals, determining that the abnormal discharge type of the abnormal signal is gap discharge or surface discharge; in the case that the audible sound signal does not have an abnormal signal and the ultrasonic wave signal has a periodic abnormal signal, determining that the abnormal discharge type of the abnormal signal is corona discharge; in the case that the audible sound signal has a periodic abnormal signal and the ultrasonic wave signal does not have an abnormal signal, determining that the abnormal discharge type of the abnormal signal is floating discharge.

[0134] S5, determining the abnormal discharge position based on the abnormal signal to obtain a first discharge detection result, the first discharge detection result including the abnormal discharge time, the abnormal discharge type and the abnormal discharge position of the abnormal signal.

[0135] S6, comparing the visible light image with a preset reference image to detect whether there is a glow signal in the area where the test equipment is located to obtain an image comparison result and a glow signal detection result.

[0136] S7, in the case that the glow signal detection result represents that there is a glow signal and the image comparison result represents that the similarity between the visible light image and the reference image is higher than a preset similarity threshold, determining that the abnormal discharge type of the visible light image is corona discharge; in the case that the glow signal detection result represents that there is no glow signal and the image comparison result represents that the similarity between the visible light image and the reference image is lower than the preset similarity threshold, determining that the abnormal discharge type of the visible light image is floating discharge; in the case that the glow signal detection result represents that there is a glow signal and the image comparison result represents that the similarity between the visible light image and the reference image is lower than the preset similarity threshold, determining that the abnormal discharge type of the visible light image is gap discharge or surface discharge, the second discharge detection result including the visible light image collected at the moment when the glow signal is detected and the abnormal discharge type of the visible light image.

[0137] S8, in the case that the first discharge detection result and the second discharge detection result represent that there is abnormal discharge, screening out target first discharge detection result and target second discharge detection result with the same abnormal discharge time from the first discharge detection result and the second discharge detection result.

[0138] S9, if the abnormal discharge types of the target first discharge detection result and the target second discharge detection result are consistent, positioning the abnormal discharge point based on the target first discharge detection result and the target second discharge detection result; if the abnormal discharge types of the target first discharge detection result and the target second discharge detection result are inconsistent, positioning the abnormal discharge point based on the target second discharge detection result.

[0139] It should be understood that although the steps in the flowcharts involved in the embodiments described above are shown in sequence according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, the execution of these steps is not strictly limited in sequence, and these steps can be executed in other orders. Moreover, at least some of the steps in the flowcharts involved in the embodiments described above can include multiple steps or multiple stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily sequential, but can be alternately executed with at least some of the other steps or steps or stages in other steps.

[0140] In an example embodiment, as shown in Figure 6 An overvoltage test abnormality positioning analysis device 600 is provided, comprising: a data acquisition module 610, a first discharge detection module 620, a second discharge detection module 630, and an abnormality positioning analysis module 640, wherein:

[0141] The data acquisition module 610 is configured to acquire sound signals and visible light images of a region where the test equipment is located, when the voltage of the test equipment rises to and is maintained at a preset test high voltage.

[0142] The first discharge detection module 620 is configured to identify whether the sound signals contain abnormal signals, and obtain a first discharge detection result.

[0143] The second discharge detection module 630 is configured to compare the visible light images with a preset reference image, and detect whether there is a glow signal in the region where the test equipment is located, to obtain an image comparison result and a glow signal detection result; and determine whether there is abnormal discharge based on the image comparison result and the glow signal detection result, to obtain a second discharge detection result.

[0144] The abnormality positioning analysis module 640 is configured to, when the first discharge detection result and the second discharge detection result indicate that there is abnormal discharge, locate an abnormal discharge point based on the first discharge detection result and the second discharge detection result.

[0145] In an example embodiment, the abnormality positioning analysis module 640 is further configured to filter out target first discharge detection results and target second discharge detection results with the same abnormal discharge time from the first discharge detection result and the second discharge detection result; if the abnormal discharge types of the target first discharge detection result and the target second discharge detection result are consistent, locate the abnormal discharge point based on the target first discharge detection result and the target second discharge detection result; and if the abnormal discharge types of the target first discharge detection result and the target second discharge detection result are inconsistent, locate the abnormal discharge point based on the target second discharge detection result.

[0146] In an example embodiment, the first discharge detection module 620 is further configured to perform de-noising processing on the audible sound signal and the ultrasonic signal based on a reference audible sound signal and a reference ultrasonic signal, the reference audible sound signal and the reference ultrasonic signal being collected when the voltage of the test device is at a preset reference voltage; in a case where an abnormal signal exists in at least one of the de-noised audible sound signal and the de-noised ultrasonic signal, determining an abnormal discharge type of the abnormal signal based on a preset abnormal discharge signal analysis strategy; determining an abnormal discharge position based on the abnormal signal, and the first discharge detection result comprising an abnormal discharge time, the abnormal discharge type and the abnormal discharge position of the abnormal signal.

[0147] In an example embodiment, the first discharge detection module 620 is further configured to determine that the abnormal discharge type of the abnormal signal is gap discharge or surface discharge in a case where the audible sound signal and the ultrasonic signal both have steep wave signals; determine that the abnormal discharge type of the abnormal signal is corona discharge in a case where the audible sound signal does not have an abnormal signal and the ultrasonic signal has a periodic abnormal signal; and determine that the abnormal discharge type of the abnormal signal is floating discharge in a case where the audible sound signal has a periodic abnormal signal and the ultrasonic signal does not have an abnormal signal.

[0148] In an example embodiment, the second discharge detection module 630 is further configured to determine that the abnormal discharge type of the visible light image is corona discharge in a case where the glow signal detection result indicates that there is a glow signal and the image comparison result indicates that the similarity between the visible light image and the reference image is higher than a preset similarity threshold;

[0149] determine that the abnormal discharge type of the visible light image is floating discharge in a case where the glow signal detection result indicates that there is no glow signal and the image comparison result indicates that the similarity between the visible light image and the reference image is lower than a preset similarity threshold;

[0150] determine that the abnormal discharge type of the visible light image is gap discharge or surface discharge in a case where the glow signal detection result indicates that there is a glow signal and the image comparison result indicates that the similarity between the visible light image and the reference image is lower than a preset similarity threshold, and the second discharge detection result comprising the visible light image collected at the time when the glow signal is detected and the abnormal discharge type of the visible light image.

[0151] In an example embodiment, the second discharge detection module 630 is further configured to, in a case where the voltage of the test device is at the preset reference voltage, detect whether a glow signal exists in the area where the test device is located, to obtain a glow signal detection result; and in a case where the glow signal detection result indicates that the glow signal exists, acquire a target visible light image collected at a moment when the glow signal is detected, and determine that the target visible light image is an abnormal image.

[0152] The withstand voltage test abnormality positioning analysis apparatus 600 further includes an alarm information pushing module 650 configured to generate alarm information based on the abnormal image, and push the alarm information.

[0153] In an example embodiment, the alarm information pushing module 650 is further configured to, in a case where the first discharge detection result and the second discharge detection result indicate that abnormal discharge exists, generate an abnormal discharge event report based on the first discharge detection result and the second discharge detection result, the abnormal discharge event report including an abnormal discharge time, an abnormal discharge type, and an abnormal discharge position.

[0154] The modules in the withstand voltage test abnormality positioning analysis apparatus 600 described above can be all or partially implemented by software, hardware, and combinations thereof. The modules described above can be embedded in or independent of a processor in a computer device in a hardware form, or stored in a memory in a computer device in a software form, so as to be called and executed by a processor to perform operations corresponding to the modules.

[0155] In an example embodiment, as shown in Figure 7 a withstand voltage test abnormality positioning analysis system is provided, including a controller 120, an acoustic recognition system 140, and an image recognition system 160, wherein:

[0156] The acoustic recognition system 140 is configured to, in a case where the voltage of the test device rises to and maintains at a preset test high voltage, collect a sound signal in the area where the test device is located, identify whether the sound signal includes an abnormal signal, to obtain a first discharge detection result, and send the first discharge detection result to the controller 120.

[0157] The image recognition system 160 is configured to, in a case where the voltage of the test device rises to and maintains at a preset test high voltage, collect a visible light image in the area where the test device is located; compare the visible light image with a preset reference image, and detect whether a glow signal exists in the area where the test device is located, to obtain an image comparison result and a glow signal detection result, determine whether abnormal discharge exists based on the image comparison result and the glow signal detection result, to obtain a second discharge detection result, and send the second discharge detection result to the controller 120.

[0158] The controller 120 is configured to receive the first discharge detection result and the second discharge detection result, and locate the abnormal discharge point according to the first discharge detection result and the second discharge detection result when the first discharge detection result and the second discharge detection result indicate that the abnormal discharge exists.

[0159] In practical applications, the sound recognition system 140 can be composed of a plurality of sound signal collection devices and a sound recognition host to realize the collection, analysis and processing of sound signals in the area where the test equipment is located, the positioning of abnormal discharge points, and the sending of abnormal alarm information. The sound signal collection devices and the sound recognition host exchange data through an optical fiber communication mode. The sound signal collection devices include a triangular support, a composite sound collection device, a communication module, and the like. The triangular support is used for supporting and height adjusting the sensor. The composite sound collection device includes a grating sound pressure sensor, an ultrasonic sensor, a GPS positioning module, and the like. The grating sound pressure sensor is used for collecting audible sound signals, the ultrasonic sensor is used for collecting ultrasonic sound signals, and the GPS positioning module is used for positioning the three-dimensional coordinates of the sound collection sensor to calculate the position of the abnormal sound through the position information of different sound collection sensors. The communication module is used for data transmission between the sound collection sensor and the sound recognition host.

[0160] The sound recognition host processes and analyzes the audible sound signals and ultrasonic signals sent by the sound signal collection devices, classifies the abnormal discharge types, and locates the abnormal discharge points. The sound recognition host exchanges data with the controller 120.

[0161] In practical applications, the image recognition system 160 is composed of a plurality of image collection devices and an image recognition host to realize the collection, analysis and processing of visible light images in the area where the test equipment is located, and the sending of abnormal alarm information. The image collection sensor and the image recognition host exchange data through an optical fiber communication mode.

[0162] The image collection device includes a fixing device, a visible light camera, an ultraviolet sensor, a communication module, and the like. The fixing device is used for fixing the image collection device to prevent the image collection device from falling and being damaged due to external forces such as vibration and wind force when used indoors or outdoors. The visible light camera is used for collecting visible light images in the area where the test equipment is located, and the maximum wide angle is not less than 180 degrees. The ultraviolet sensor is used for detecting the glow signal in the area where the test equipment is located. The visible light camera and the ultraviolet sensor are angle-adjusted according to actual test needs when arranged on site. The communication module is used for data transmission between the image collection device and the image recognition host.

[0163] The image recognition host processes and analyzes the related information sent by the image collection devices, and classifies the abnormal discharge types of the abnormal images. The image recognition host exchanges data with the controller 120.

[0164] In practical applications, the controller 120 can include a data processor, a display, and an input device. The first discharge detection result and the second discharge detection result can be synthesized, analyzed, and displayed for abnormal discharge alarm information. The controller 120 can also record, play back, save, and export the abnormal discharge alarm information. The controller 120 can also have three process selection functions of reference voltage recording, test voltage rise recording, and test voltage drop recording. The operating personnel can select different working scenes in sequence according to different processes of the high-voltage test. The reference voltage recording mainly includes recording the reference audible sound signal, the reference ultrasonic signal, and the reference image obtained at the reference voltage when the voltage of the test equipment rises from 0 kV to the reference voltage. The test voltage rise recording mainly includes collecting, storing, and alarm pushing of the abnormal discharge information during the process of rising the voltage from the reference voltage to the test high voltage. The test voltage drop recording mainly includes collecting, storing, and alarm pushing of the abnormal discharge information during the process of dropping the voltage from the test voltage to 0 kV.

[0165] Through the interaction of the controller, the sound recognition system, and the image recognition system of the above-mentioned withstand voltage test abnormal positioning analysis system, the steps in any one of the above-mentioned withstand voltage test abnormal positioning analysis method embodiments are executed to identify the abnormal discharge condition in the withstand voltage test process and locate the abnormal discharge point.

[0166] By deploying the withstand voltage test abnormal positioning analysis system in the area where the test equipment is located, the abnormal image capture and multi-point sound tracing positioning are performed in the process of rising the voltage of the test equipment according to the sound recognition system and the image recognition system in the system to obtain the first discharge detection result and the second discharge detection result. The controller further analyzes whether there is an abnormal discharge according to the first discharge detection result and the second discharge detection result, thereby locating the abnormal discharge point in the case of abnormal discharge, realizing the automatic capture of the abnormal discharge point in the test, and improving the accuracy and efficiency of the abnormal discharge point positioning of the super and extra-high voltage AC / DC equipment withstand voltage test.

[0167] In one exemplary embodiment, the sound recognition system 140 is further configured to perform denoising processing on the audible sound signal and the ultrasonic signal based on a reference audible sound signal and a reference ultrasonic signal. The reference audible sound signal and the reference ultrasonic signal are obtained when the voltage of the test equipment is at a preset reference voltage. In the case that at least one of the denoised audible sound signal and the ultrasonic signal contains an abnormal signal, the abnormal discharge type of the abnormal signal is determined based on a preset abnormal discharge signal analysis strategy, and the abnormal discharge position is determined based on the abnormal signal. The first discharge detection result includes the abnormal discharge time, the abnormal discharge type, and the abnormal discharge position of the abnormal signal.

[0168] The controller 120 is further configured to, in a case where the first discharge detection result and the second discharge detection result represent that there is abnormal discharge, generate an abnormal discharge event report based on the first discharge detection result and the second discharge detection result, the abnormal discharge event report including an abnormal discharge time, an abnormal discharge type, and an abnormal discharge position.

[0169] In actual applications, in a case where the first discharge detection result and the second discharge detection result represent that there is abnormal discharge, the controller 120 can extract the abnormal discharge time, the abnormal discharge type, the abnormal signal, the visible light image, and the abnormal discharge position in the first discharge detection result and the second discharge detection result, and generate the abnormal discharge event report, so as to facilitate a test personnel to evaluate the withstand capability of the test equipment and the electric wire cable through the abnormal discharge event report and to make subsequent adjustment.

[0170] In order to make a clearer description of the withstand test abnormal positioning analysis system and the withstand test abnormal positioning method provided in the present application, in possible embodiments, the abnormal positioning of the withstand test abnormal positioning analysis system can be:

[0171] Firstly, a plurality of sound collection sensors and image collection devices, and corresponding sound recognition hosts and image recognition hosts are deployed in an area where the test equipment is located. Online self-checking and clock consistency checking of components of the sound recognition system and the image recognition system are performed.

[0172] Secondly, the voltage of the test equipment is controlled to be raised to a reference voltage by a boosting device, the sound recognition system collects reference audible sound signals, reference ultrasonic signals, amplitudes, effective values, 50Hz correlations, and test frequency correlations of the reference ultrasonic signals, and the image recognition system collects reference images.

[0173] In the third step, the voltage of the test equipment is raised from the reference voltage to the test high voltage through the boosting device, and during the test high voltage, the sound recognition system collects the sound signals of the area where the test equipment is located in real time, identifies whether the sound signals have abnormal signals, obtains the first discharge detection result, and sends the first discharge detection result to the controller. At the same time, the image recognition system collects the visible light images of the area where the test equipment is located, compares the visible light images with the preset reference images, and detects whether there is a glow signal in the area where the test equipment is located, obtains the image comparison result and the glow signal detection result, judges whether there is abnormal discharge based on the image comparison result and the glow signal detection result, obtains the second discharge detection result, and sends the second discharge detection result to the controller. The controller receives the first discharge detection result sent by the sound recognition system and the second discharge detection result sent by the image recognition system. In the case that the first discharge detection result and the second discharge detection result represent that there is abnormal discharge, the abnormal discharge point is located according to the first discharge detection result and the second discharge detection result, the abnormal alarm information is generated based on the first discharge detection result and the second discharge detection result and the located abnormal discharge point, and the abnormal alarm information is pushed.

[0174] In the fourth step, during the process that the voltage of the test equipment is reduced from the test high voltage to the reference voltage through the boosting device, the sound recognition system collects the sound signals of the area where the test equipment is located, identifies whether the sound signals have abnormal signals, obtains the third discharge detection result, and sends the third discharge detection result to the controller. At the same time, the image recognition system collects the visible light images of the area where the test equipment is located, compares the visible light images with the preset reference images, obtains the image comparison result, judges whether there is abnormal discharge based on the image comparison result, obtains the fourth discharge detection result, and sends the fourth discharge detection result to the controller. The controller receives the third discharge detection result and the fourth discharge detection result at the same time, and determines the target third discharge detection result and the target fourth discharge detection result representing that there is abnormal discharge. If the abnormal discharge time in the target third discharge detection result and the target fourth discharge detection result is the same, the abnormal discharge information in the target third discharge detection result and the target fourth discharge detection result is combined to generate the abnormal alarm information, and the abnormal alarm information is pushed. If the abnormal discharge time in the target third discharge detection result and the target fourth discharge detection result is not the same, the abnormal alarm information is generated according to the abnormal discharge information in the target third discharge detection result and the target fourth discharge detection result respectively, and the abnormal alarm information is pushed.

[0175] In the fifth step, based on the first discharge detection result and the second discharge detection result representing that there is abnormal discharge, the abnormal discharge event report is generated when the voltage of the test equipment is reduced to below the reference voltage by the boosting device. The abnormal discharge event report includes the abnormal discharge time, the abnormal discharge type and the abnormal discharge position.

[0176] In an exemplary embodiment, a computer device is provided, which can be a server, and an internal structure diagram thereof can be as shown in Figure 8 The computer device includes a processor, a memory, an input / output interface (I / O), and a communication interface. The processor, the memory, and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for running the operating system and the computer program in the non-volatile storage medium. The database of the computer device is configured to store data such as sound signals, visible light images, and reference images. The input / output interface of the computer device is configured to exchange information between the processor and external devices. The communication interface of the computer device is configured to communicate with terminals outside through a network connection. The computer program is executed by the processor to implement a withstand voltage test abnormality positioning analysis method.

[0177] Those skilled in the art can understand that Figure 8 The structure shown in the above embodiment is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the computer device to which the scheme of the present application is applied. The specific computer device can include more or fewer components than those shown in the diagram, or combine certain components, or have a different arrangement of components.

[0178] In an exemplary embodiment, a computer device is provided, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps in any one of the above embodiments of the withstand voltage test abnormality positioning analysis method.

[0179] In an embodiment, a computer readable storage medium is provided, which stores a computer program. The computer program is executed by a processor to implement the steps in any one of the above embodiments of the withstand voltage test abnormality positioning analysis method.

[0180] In an embodiment, a computer program product is provided, which includes a computer program. The computer program is executed by a processor to implement the steps in any one of the above embodiments of the withstand voltage test abnormality positioning analysis method.

[0181] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the present application are all information and data authorized by the user or authorized by all parties, and the collection, use, and processing of related data need to comply with relevant regulations.

[0182] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when executed, can include the processes of the above-mentioned embodiment methods. Any reference to memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. The non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical storage, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. The volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration but not limitation, the RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The database involved in the embodiments provided in the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided in the present application can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., without being limited thereto.

[0183] The technical features of the above embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the present application.

[0184] The above-described embodiments are merely illustrative of several embodiments of the present application, and the description is relatively specific and detailed, but should not be understood as a limitation on the scope of the patent. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. A method of abnormality positioning analysis of a pressure resistance test, characterized by, The method comprises: acquiring a sound signal and a visible light image of an area where the test equipment is located in a case where a voltage of the test equipment rises to and is maintained at a preset test high voltage; identifying whether the sound signal has an abnormal signal to obtain a first discharge detection result; comparing the visible light image with a preset reference image and detecting whether there is a glow signal in the area where the test equipment is located to obtain an image comparison result and a glow signal detection result; judging whether there is abnormal discharge based on the image comparison result and the glow signal detection result to obtain a second discharge detection result; in a case where the first discharge detection result and the second discharge detection result represent that there is abnormal discharge, positioning an abnormal discharge point according to the first discharge detection result and the second discharge detection result.

2. The method of claim 1, wherein, The positioning of the abnormal discharge point according to the first discharge detection result and the second discharge detection result comprises: screening a target first discharge detection result and a target second discharge detection result with the same abnormal discharge time from the first discharge detection result and the second discharge detection result; if the abnormal discharge types of the target first discharge detection result and the target second discharge detection result are consistent, positioning the abnormal discharge point based on the target first discharge detection result and the target second discharge detection result; if the abnormal discharge types of the target first discharge detection result and the target second discharge detection result are inconsistent, positioning the abnormal discharge point based on the target second discharge detection result.

3. The method of claim 1, wherein, The sound signal comprises audible sound signals and ultrasonic signals, and the identification of whether the sound signal has an abnormal signal to obtain a first discharge detection result comprises: performing denoising processing on the audible sound signals and the ultrasonic signals through reference audible sound signals and reference ultrasonic signals, the reference audible sound signals and the reference ultrasonic signals being acquired in a case where a voltage of the test equipment is at a preset reference voltage; in a case where at least one of the audible sound signals and the ultrasonic signals after denoising has an abnormal signal, determining an abnormal discharge type of the abnormal signal based on a preset abnormal discharge signal analysis strategy; determining an abnormal discharge position based on the abnormal signal, the first discharge detection result comprising an abnormal discharge time, an abnormal discharge type and an abnormal discharge position of the abnormal signal.

4. The method of claim 3, wherein, The determination of the abnormal discharge type of the abnormal signal based on the preset abnormal discharge signal analysis strategy comprises: in a case where both the audible sound signals and the ultrasonic signals have steep wave signals, determining that the abnormal discharge type of the abnormal signal is gap discharge or surface discharge; in a case where the audible sound signals have no abnormal signal and the ultrasonic signals have periodic abnormal signals, determining that the abnormal discharge type of the abnormal signal is corona discharge; in a case where the audible sound signals have periodic abnormal signals and the ultrasonic signals have no abnormal signal, determining that the abnormal discharge type of the abnormal signal is floating discharge.

5. The method according to any one of claims 1 to 4, characterized in that, The second discharge detection result is obtained by judging whether abnormal discharge exists based on the image comparison result and the glow signal detection result, and the method comprises the following steps: in the case that the image comparison result indicates that the similarity between the visible light image and the reference image is higher than the preset similarity threshold, and the glow signal detection result indicates that the glow signal exists, it is determined that the abnormal discharge type of the visible light image is corona discharge; in the case that the image comparison result indicates that the similarity between the visible light image and the reference image is lower than the preset similarity threshold, and the glow signal detection result indicates that the glow signal does not exist, it is determined that the abnormal discharge type of the visible light image is floating discharge; in the case that the image comparison result indicates that the similarity between the visible light image and the reference image is lower than the preset similarity threshold, and the glow signal detection result indicates that the glow signal exists, it is determined that the abnormal discharge type of the visible light image is gap discharge or surface discharge, and the second discharge detection result comprises the visible light image collected at the moment when the glow signal is detected and the abnormal discharge type of the visible light image.

6. The method according to any one of claims 1 to 4, characterized in that, The method further comprises: in the case that the voltage of the test equipment is at a preset reference voltage, detecting whether the glow signal exists in the area where the test equipment is located to obtain a glow signal detection result; in the case that the glow signal detection result indicates that the glow signal exists, obtaining a target visible light image collected at the moment when the glow signal is detected, and determining that the target visible light image is an abnormal image; generating an alarm information based on the abnormal image, and pushing the alarm information.

7. A pressur e test abnormality positioning analysis device characterized by comprising: The device comprises: a data acquisition module configured to acquire a sound signal and a visible light image of an area where a test equipment is located in the case that the voltage of the test equipment rises to and maintains at a preset test high voltage; a first discharge detection module configured to identify whether the sound signal contains an abnormal signal to obtain a first discharge detection result; a second discharge detection module configured to compare the visible light image with a preset reference image, detect whether a glow signal exists in the area where the test equipment is located, obtain an image comparison result and a glow signal detection result, and judge whether abnormal discharge exists based on the image comparison result and the glow signal detection result to obtain a second discharge detection result; an abnormal positioning and analysis module configured to, in the case that the first discharge detection result and the second discharge detection result indicate that abnormal discharge exists, position an abnormal discharge point according to the first discharge detection result and the second discharge detection result.

8. A pressure test anomaly localization analysis system, characterized by, The withstand voltage test abnormal positioning and analysis system comprises a controller, an acoustic recognition system and an image recognition system, wherein the acoustic recognition system and the image recognition system are respectively in communication connection with the controller: the acoustic recognition system is configured to, in the case that the voltage of the test equipment rises to and maintains at a preset test high voltage, collect a sound signal of the area where the test equipment is located, identify whether the sound signal contains an abnormal signal to obtain a first discharge detection result, and send the first discharge detection result to the controller; The image recognition system is configured to acquire a visible light image of a region where the test device is located when a voltage of the test device rises to and is maintained at a preset test high voltage; compare the visible light image with a preset reference image, and detect whether there is a glow signal in the region where the test device is located to obtain an image comparison result and a glow signal detection result; determine whether there is abnormal discharge based on the image comparison result and the glow signal detection result to obtain a second discharge detection result; and send the second discharge detection result to the controller. The controller is configured to receive the first discharge detection result and the second discharge detection result, and locate an abnormal discharge point based on the first discharge detection result and the second discharge detection result when the first discharge detection result and the second discharge detection result indicate that there is abnormal discharge.

9. The system of claim 8, wherein, The acoustic recognition system is further configured to perform denoising processing on the audible sound signal and the ultrasonic wave signal based on a reference audible sound signal and a reference ultrasonic wave signal, the reference audible sound signal and the reference ultrasonic wave signal being acquired when a voltage of the test device is at a preset reference voltage, and in a case where there is an abnormal signal in at least one of the denoised audible sound signal and the ultrasonic wave signal, determining an abnormal discharge type of the abnormal signal based on a preset abnormal discharge signal analysis strategy, and determining an abnormal discharge position based on the abnormal signal, the first discharge detection result including an abnormal discharge time, an abnormal discharge type, and an abnormal discharge position of the abnormal signal.

10. The system of claim 9, wherein, The controller is further configured to generate an abnormal discharge event report based on the first discharge detection result and the second discharge detection result when the first discharge detection result and the second discharge detection result indicate that there is abnormal discharge, the abnormal discharge event report including an abnormal discharge time, an abnormal discharge type, and an abnormal discharge position.

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