CN112782538A - Cable partial discharge detection method and device based on ultralow frequency power supply cut-off signal - Google Patents
Cable partial discharge detection method and device based on ultralow frequency power supply cut-off signal Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
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Abstract
The application relates to a cable partial discharge detection method and device based on an ultralow frequency power supply cut-off signal. The method comprises the steps of obtaining a detection control signal corresponding to the partial discharge detection of the cable; converting the detection control signal into an identification signal; carrying out partial discharge detection on a preset cable to be detected according to the detection control signal to obtain cable partial discharge detection data; filtering identification interference data in the cable partial discharge detection data; and acquiring a cable partial discharge detection result according to the cable partial discharge detection data after the identification interference data is filtered. This application obtains the testing result with identification signal and predetermined interference pulse width through the specific long detection data of filtering to effectively avoided the interference that electronic switch action pulse leads to, improved the rate of accuracy that detects.
Description
Technical Field
The application relates to the field of power grid lines, in particular to a cable partial discharge detection method and device based on an ultralow frequency power supply cut-off signal.
Background
A cable refers to a wire made of one or more mutually insulated conductors and an outer insulating protective layer that transmits power or information from one place to another. The cable includes power cable, control cable, compensation cable, shielding cable, high-temperature cable, computer cable, signal cable, coaxial cable, fire-resistant cable, marine cable, mining cable, aluminum alloy cable and the like. They are composed of single or multi-strand wires and insulating layers, and are used for connecting circuits, electric appliances and the like. At present, during the voltage resistance test of the cable, a partial discharge test is required, so that the potential insulation defect of the power cable is found in time, and the cable with the tiny defect is prevented from being connected into a power grid.
The partial discharge test is carried out in the cable voltage-withstand test period and is different from the partial discharge test under the normal operation of the cable, and because the voltage-withstand test power supply adopts the pulse width modulation principle, an electronic switch in the voltage-withstand test power supply can be frequently switched on and off to generate a required 0.1Hz ultralow frequency sinusoidal signal. Because the electronic switch can produce the pulse signal when breaking, this signal can bring the interference to the partial discharge test, the commonly used measure of solving this interference at present is frequency-selective filtering, namely through adjusting the detection frequency of the tester of partial discharge, choose a frequency channel with lower interference signal to test, thus reach the purpose to reduce interference, this mode can only reduce interference, can't thoroughly filter the interference.
Disclosure of Invention
In view of the above, it is necessary to provide a cable partial discharge detection method, apparatus, computer device and storage medium based on an ultra-low frequency power supply cut-off signal, which can effectively filter interference during a cable partial discharge test.
A method for detecting partial discharge of a cable based on an ultra low frequency power supply cut-off signal, the method comprising:
acquiring a detection control signal corresponding to cable partial discharge detection, wherein the detection control signal is generated based on an ultralow frequency power supply cut-off signal;
converting the detection control signal into an identification signal;
carrying out partial discharge detection on a preset cable to be detected according to the detection control signal to obtain cable partial discharge detection data;
filtering identification interference data in the cable partial discharge detection data according to the identification signal and a preset interference pulse width;
and acquiring a cable partial discharge detection result according to the cable partial discharge detection data after the identification interference data is filtered.
In one embodiment, before filtering the identification interference data in the cable partial discharge detection data according to the identification signal and a preset interference pulse width, the method includes:
acquiring pulse interference signals generated when an electronic switch in the preset cable partial discharge detection system is opened and closed in historical data;
and acquiring a preset interference pulse width according to the pulse interference signal.
In one embodiment, the obtaining a preset interference pulse width according to the pulse interference signal includes:
and acquiring the preset interference pulse width according to the average value of the pulse interference signals in the preset test time.
In one embodiment, the acquiring a detection control signal corresponding to the cable partial discharge detection includes:
and acquiring a detection control signal corresponding to the partial discharge detection of the cable in a wireless communication mode.
In one embodiment, the detection control signal comprises an ultra low frequency sinusoidal signal.
In one embodiment, after obtaining a cable partial discharge detection result according to the cable partial discharge detection data after the identification interference data is filtered, the method further includes:
generating a cable partial discharge detection report according to the cable partial discharge detection result;
and feeding back a cable partial discharge detection report.
A cable partial discharge detection apparatus based on an ultra low frequency power supply cut-off signal, the apparatus comprising:
the signal acquisition module is used for acquiring a detection control signal corresponding to the cable partial discharge detection;
the signal conversion module is used for converting the detection control signal into an identification signal;
the cable detection module is used for carrying out partial discharge detection on a preset cable to be detected according to the detection control signal to obtain cable partial discharge detection data;
the data filtering module is used for filtering identification interference data in the cable partial discharge detection data according to the identification signal and a preset interference pulse width;
and the performance detection module is used for acquiring a cable partial discharge detection result according to the cable partial discharge detection data after the identification interference data is filtered.
In one embodiment, the pulse width recognition module is further included to: acquiring a pulse interference signal generated when an electronic switch in the preset cable partial discharge detection system is opened and closed; and acquiring a preset interference pulse width according to the pulse interference signal.
A computer device comprising a memory and a processor, the memory storing a computer program, the processor implementing the following steps when executing the computer program:
acquiring a detection control signal corresponding to the partial discharge detection of the cable;
converting the detection control signal into an identification signal;
carrying out partial discharge detection on a preset cable to be detected according to the detection control signal to obtain cable partial discharge detection data;
filtering identification interference data in the cable partial discharge detection data according to the identification signal and a preset interference pulse width;
and acquiring a cable partial discharge detection result according to the cable partial discharge detection data after the identification interference data is filtered.
A computer-readable storage medium, on which a computer program is stored which, when executed by a processor, carries out the steps of:
acquiring a detection control signal corresponding to the partial discharge detection of the cable;
converting the detection control signal into an identification signal;
carrying out partial discharge detection on a preset cable to be detected according to the detection control signal to obtain cable partial discharge detection data;
filtering identification interference data in the cable partial discharge detection data according to the identification signal and a preset interference pulse width;
and acquiring a cable partial discharge detection result according to the cable partial discharge detection data after the identification interference data is filtered.
According to the method, the device, the computer equipment and the storage medium for detecting the partial discharge of the cable based on the ultra-low frequency power supply cut-off signal, the detection control signal corresponding to the partial discharge detection of the cable is obtained; converting the detection control signal into an identification signal; carrying out partial discharge detection on a preset cable to be detected according to the detection control signal to obtain cable partial discharge detection data; filtering identification interference data in the cable partial discharge detection data according to the identification signal and a preset interference pulse width; and acquiring a cable partial discharge detection result according to the cable partial discharge detection data after the identification interference data is filtered. This application is through detecting control signal conversion behind the identification signal, wait to detect the cable and carry out partial discharge detection to predetermineeing according to detecting control signal simultaneously, acquires cable partial discharge detection data, then with identification signal and predetermine the interference pulse width, through the specific long detection data of filtering, obtains the testing result to effectively avoided the interference that electronic switch action pulse leads to, improved the rate of accuracy that detects.
Drawings
FIG. 1 is a diagram of an embodiment of an application environment of a cable partial discharge detection method based on an ultra-low frequency power supply cut-off signal;
FIG. 2 is a schematic flow chart of a cable partial discharge detection method based on an ultra low frequency power supply cut-off signal according to an embodiment;
FIG. 3 is a schematic illustration of an identification signal in one embodiment;
FIG. 4 is a flowchart illustrating the step of determining the preset glitch pulse width in one embodiment;
FIG. 5 is a block diagram of a cable partial discharge detection apparatus based on an ultra low frequency power-off signal according to an embodiment;
FIG. 6 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The method for detecting the partial discharge of the cable based on the ultra-low frequency power supply cut-off signal can be applied to the application environment shown in fig. 1. Wherein the cable ultra-low frequency withstand voltage test power supply 102 is connected with the cable partial discharge detection system 104. The ultra-low frequency withstand voltage test power supply 102 is used for generating a test control signal for cable partial discharge detection, and the cable partial discharge detection system 104 comprises a processor for acquiring a detection control signal corresponding to the cable partial discharge detection; then converting the detection control signal into an identification signal, and carrying out partial discharge detection on a preset cable to be detected according to the detection control signal to obtain cable partial discharge detection data; according to the identification signal and the preset interference pulse width, filtering identification interference data in the cable partial discharge detection data; and acquiring a cable partial discharge detection result according to the cable partial discharge detection data after the identification interference data is filtered.
In one embodiment, as shown in fig. 2, a method for detecting partial discharge of cable based on an ultra-low frequency power-off signal is provided, which is illustrated by using a processor in the cable partial discharge detection system 104 in fig. 1 as an example, and includes the following steps:
The power supply control loop is a control loop for generating a test signal in the ultralow frequency and voltage withstand test power supply 102. The control loop of the variable frequency test power supply sends a control signal to the electronic switch so as to control the on-off action of the electronic switch in the cable partial discharge detection system and control the detection process of the cable partial discharge detection.
Specifically, the cable partial discharge detection method is specifically used for simultaneously carrying out partial discharge tests during a withstand voltage test of the cable, can timely find potential insulation defects of the power cable, and avoids the situation that the cable with the tiny defects is connected into a power grid. At this time, the power supply for generating the detection control signal during the partial discharge detection is the ultra-low frequency withstand voltage test power supply for the withstand voltage test, and the detection control signal needs to be processed to a certain extent by the server first, so as to facilitate the subsequent cable partial discharge detection.
The identification signal is a signal that can be easily identified and located by the cable partial discharge detection system 104, and specifically, since the withstand voltage test power supply for detecting the cable partial discharge adopts the pulse width modulation principle, the electronic switch inside the cable partial discharge test power supply is frequently turned on and off to generate the required 0.1Hz ultra-low frequency sinusoidal signal.
Because the inside electronic switch of power can produce pulse signal when breaking, this signal can bring the interference to the partial discharge test, consequently need carry out certain processing, in this application, after withstand voltage test power produces detection control signal through the switching action, earlier through detecting control signal and changing into identification signal and come its mark, then carry out corresponding cable office point detection based on the data after the mark, thereby can be when subsequent experimental data handles, come the data filtering that pulse signal corresponds based on the mark, improve the validity of the detection data who obtains. In a particular embodiment, the detection control signal comprises in particular an ultra low frequency sinusoidal signal. And the converted identification signal can be referred to fig. 3.
And step 205, performing partial discharge detection on a preset cable to be detected according to the detection control signal, and acquiring cable partial discharge detection data.
The cable partial discharge detection system can detect partial discharge of a cable based on the detection control signal, then generates cable partial discharge detection data, and then presets the cable to be detected based on analysis of the cable partial discharge detection data to determine whether a potential insulation defect exists, so that a fault cable is prevented from being connected into a power grid.
Specifically, the cable partial discharge detection system performs subsequent partial discharge detection on a preset cable to be detected according to the obtained detection control signal, obtains corresponding cable partial discharge detection data, and performs subsequent detection result inference according to the data.
And step 207, filtering identification interference data in the cable partial discharge detection data according to the identification signal and the preset interference pulse width.
And 209, acquiring a cable partial discharge detection result according to the cable partial discharge detection data after the identification interference data is filtered.
The identification disturbance data refers to a part of data disturbed in the partial discharge detection due to the pulse influence of the electronic switch. The preset interference pulse width is the width ratio of the identification interference data in the whole cable partial discharge detection data, the pulse caused by the electronic switch only affects a small part of the data in the cable partial discharge detection data, and the small part of the ratio can be identified through the preset interference pulse width. The preset glitch pulse width identification can be summarized based on historical data.
In particular, the subsequently obtained detection data may be processed in dependence of the identification signal. The method comprises the steps of marking nodes corresponding to pulses of an electronic switch marked in data, then identifying and marking the nodes of signals according to preset interference pulse width to remove interference data generated by the pulses of the electronic switch in cable partial discharge detection data, and then obtaining a cable partial discharge detection result according to the removed data, so that the effectiveness of cable partial discharge detection can be effectively improved. The diagnosis of partial discharge defects is usually performed by analyzing the phase distribution of the measured signal, since the test voltage is a sine wave, therefore, when partial discharge defects exist in the cable, the discharge amplitude is always the maximum when the voltage is the highest, namely, the partial discharge signals are distributed around 90 degrees and 270 degrees in a concentrated way on the phase, when the partial discharge test is carried out on site, because the test power supply can generate interference, various interferences also exist in the environment, the interference signals can appear in the whole phase range, once the amplitude of the interference signals reaches the amplitude of the partial discharge signals, the interference signals can submerge the partial discharge signals, so that the real partial discharge signals can not be found or distinguished from the spectrogram, since the diagnosis of the detected signal has a great influence, a major difficulty of the partial discharge detection technique is the suppression technique of the interference signal. The method processes the process of detecting the partial discharge of the cable by filtering the identification interference data corresponding to the identification signals in the detection data of the partial discharge of the cable, adopts a partial discharge signal phase windowing method based on the on-off signal of the electronic switch of the ultra-low frequency power supply, is a technology aiming at the interference brought by the ultra-low frequency sine wave voltage withstand test power supply, carries out phase windowing in a targeted manner, and completely filters the interference signals of the ultra-low frequency sine wave voltage withstand test power supply, starts from an interference source, and has a better effect.
According to the method for detecting the partial discharge of the cable based on the switching-on/off signal of the ultra-low frequency power supply, the detection control signal corresponding to the partial discharge detection of the cable is obtained; converting the detection control signal into an identification signal; carrying out partial discharge detection on a preset cable to be detected according to the detection control signal to obtain cable partial discharge detection data; according to the identification signal and the preset interference pulse width, filtering identification interference data in the cable partial discharge detection data; and acquiring a cable partial discharge detection result according to the cable partial discharge detection data after the identification interference data is filtered. This application is through detecting control signal conversion behind the identification signal, wait to detect the cable and carry out partial discharge detection to predetermineeing according to detecting control signal simultaneously, acquires cable partial discharge detection data, then with identification signal and predetermine the interference pulse width, through the specific long detection data of filtering, obtains the testing result to effectively avoided the interference that electronic switch action pulse leads to, improved the rate of accuracy that detects.
In one embodiment, as shown in fig. 4, before step 207, the method further includes:
And 403, acquiring a preset interference pulse width according to the pulse interference signal.
The historical data can be data generated in the process of testing the ultralow-frequency voltage-withstanding test power supply and the cable partial discharge detection system of the cable before actual cable detection.
Specifically, the method and the device can specifically identify the corresponding interference pulse width based on historical data. Firstly, performing testability detection through a cable ultralow frequency voltage withstand test power supply and a cable partial discharge detection system to obtain corresponding test data. And then, in the obtained testability data, pulse interference signals generated when an electronic switch of the ultralow frequency voltage-withstanding test power supply is switched on and switched off are identified, then, based on the width of the pulse interference signals, the width information corresponding to the interference pulses is preset in a cable detection system consisting of the cable ultralow frequency voltage-withstanding test power supply and a cable partial discharge detection system, and then, subsequent targeted phase windowing is carried out, so that the accuracy of cable partial discharge detection is improved. In the application, targeted width identification is carried out through historical data, so that the filtering accuracy in the data filtering process can be effectively improved, and the accuracy of cable partial discharge detection is improved.
In one embodiment, step 403 specifically includes: and acquiring the preset interference pulse width according to the average value of the pulse interference signals in the preset test time.
The preset test time may be a specified fixed time period, and it is required to ensure that all the corresponding historical data are valid historical data within the fixed time period. Then based onThe width of the preset interference pulse is determined by the average value of all pulse interference signals in the part of historical time period, so that the interference of accidental data to the identification process of the preset interference pulse width is prevented, and the accuracy rate of pulse width identification is improved. Specifically, the electronic switch can generate a pulse interference when being switched on or switched off, the pulse width is delta t, the delta t can be measured through a high-frequency oscilloscope, and the average pulse width of the pulse can be measured according to experiments because the pulse difference generated by the electronic switch in each action is not large
The external partial discharge detection system adopts a continuous detection mode, records all data detected in the whole period, and can filter and remove each mark as a starting point when displaying and processing the data after receiving the mark signal
The detection data of the time length, thereby achieving the effect of removing the interference of the electronic switch action pulse. According to the method and the device, the preset interference pulse width is obtained by presetting the average value of the pulse interference signal in the test time, and the accuracy of the preset pulse interference width identification can be effectively improved.
In one embodiment, step 201 includes: and acquiring a detection control signal corresponding to the partial discharge detection of the cable.
Specifically, the cable partial discharge detection system 104 may further include a wireless communication module for receiving the detection control signal, in one embodiment, the detection control signal is sent by using 2.4GHz wireless communication, because the amount of the identification information data is small, the time consumed in the communication process is small, the synchronization error may be controlled in the millisecond or even microsecond level, and the period of 10 seconds is negligible compared with the period of 0.1 Hz.
In one embodiment, after step 209, the method further includes: generating a cable partial discharge detection report according to a cable partial discharge detection result; and feeding back a cable partial discharge detection report.
Specifically, the server may determine, according to the cable partial discharge detection result obtained by the analysis, whether the detected cable has a problem, what problem exists, and other information, and then generate a corresponding cable partial discharge detection report according to the information, and simultaneously feed back the obtained report to the cable maintenance staff side. In this embodiment, the detection result of the discharge detection of the cable can be displayed more intuitively by generating and feeding back the cable partial discharge detection report.
It should be understood that although the various steps in the flow diagrams of fig. 2-4 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps of fig. 2-4 may include multiple steps or phases that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the steps or phases is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the other steps or phases.
In one embodiment, as shown in fig. 5, there is provided a cable partial discharge detection apparatus based on an ultra low frequency power supply cut-off signal, including: the signal acquisition module 502, the signal conversion module 504, the data receiving and sending module 506, and the data filtering module 508 performance detection module 510, wherein:
the signal obtaining module 502 is configured to obtain a detection control signal corresponding to the cable partial discharge detection, where the detection control signal is generated based on the ultra-low frequency power supply cut-off signal.
The signal conversion module 504 is configured to convert the detection control signal into an identification signal, and generate a detection control instruction corresponding to the identification signal.
And a cable detection module 506, configured to send a detection control instruction to an external cable partial discharge detection system, and obtain cable partial discharge detection data fed back by the external cable partial discharge detection system according to the detection control instruction.
And the data filtering module 508 is configured to filter out identification interference data corresponding to the identification signal in the cable partial discharge detection data, where the identification interference data is identified based on a preset interference pulse width.
And the performance detection module 510 is configured to obtain a cable partial discharge detection result according to the cable partial discharge detection data after the identification interference data is filtered.
In one embodiment, the system further comprises a width identification module, configured to: acquiring a pulse interference signal generated when an electronic switch in a preset cable partial discharge detection system is opened and closed; and acquiring a preset interference pulse width according to the pulse interference signal.
In one embodiment, the width identification module is further configured to: and acquiring the preset interference pulse width according to the average value of the pulse interference signals in the preset test time.
In one embodiment, the data sending module 506 is specifically configured to: and acquiring a detection control signal corresponding to the partial discharge detection of the cable in a wireless communication mode.
In one embodiment, the detection control signal comprises an ultra low frequency sinusoidal signal.
In one embodiment, the system further comprises a report generation module for: generating a cable partial discharge detection report according to a cable partial discharge detection result; and feeding back a cable partial discharge detection report.
For specific definition of the cable partial discharge detection device, reference may be made to the above definition of the cable partial discharge detection method, which is not described herein again. The modules in the cable partial discharge detection device can be wholly or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as shown in fig. 6. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile 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 the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer device is used for storing cable partial discharge detection data. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a method of cable partial discharge detection.
Those skilled in the art will appreciate that the architecture shown in fig. 6 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
acquiring a detection control signal corresponding to the partial discharge detection of the cable, wherein the detection control signal is generated based on an ultralow frequency power supply cut-off signal;
converting the detection control signal into an identification signal;
carrying out partial discharge detection on a preset cable to be detected according to the detection control signal to obtain cable partial discharge detection data;
according to the identification signal and the preset interference pulse width, filtering identification interference data in the cable partial discharge detection data;
and acquiring a cable partial discharge detection result according to the cable partial discharge detection data after the identification interference data is filtered.
In one embodiment, the processor, when executing the computer program, further performs the steps of: acquiring pulse interference signals generated when an electronic switch in a cable partial discharge detection system is opened and closed in historical data in a preset mode; and acquiring a preset interference pulse width according to the pulse interference signal.
In one embodiment, the processor, when executing the computer program, further performs the steps of: and acquiring the preset interference pulse width according to the average value of the pulse interference signals in the preset test time.
In one embodiment, the processor, when executing the computer program, further performs the steps of: and acquiring a detection control signal corresponding to the partial discharge detection of the cable in a wireless communication mode.
In one embodiment, the processor, when executing the computer program, further performs the steps of: generating a cable partial discharge detection report according to a cable partial discharge detection result; and feeding back a cable partial discharge detection report.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
acquiring a detection control signal corresponding to the partial discharge detection of the cable, wherein the detection control signal is generated based on an ultralow frequency power supply cut-off signal;
converting the detection control signal into an identification signal;
carrying out partial discharge detection on a preset cable to be detected according to the detection control signal to obtain cable partial discharge detection data;
according to the identification signal and the preset interference pulse width, filtering identification interference data in the cable partial discharge detection data;
and acquiring a cable partial discharge detection result according to the cable partial discharge detection data after the identification interference data is filtered.
In one embodiment, the computer program when executed by the processor further performs the steps of: acquiring pulse interference signals generated when an electronic switch in a cable partial discharge detection system is opened and closed in historical data in a preset mode; and acquiring a preset interference pulse width according to the pulse interference signal.
In one embodiment, the computer program when executed by the processor further performs the steps of: and acquiring the preset interference pulse width according to the average value of the pulse interference signals in the preset test time.
In one embodiment, the computer program when executed by the processor further performs the steps of: and acquiring a detection control signal corresponding to the partial discharge detection of the cable in a wireless communication mode.
In one embodiment, the computer program when executed by the processor further performs the steps of: generating a cable partial discharge detection report according to a cable partial discharge detection result; and feeding back a cable partial discharge detection report.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware related to instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for detecting partial discharge of a cable based on an ultra low frequency power supply cut-off signal, the method comprising:
acquiring a detection control signal corresponding to cable partial discharge detection, wherein the detection control signal is generated based on an ultralow frequency power supply cut-off signal;
converting the detection control signal into an identification signal;
carrying out partial discharge detection on a preset cable to be detected according to the detection control signal to obtain cable partial discharge detection data;
filtering identification interference data in the cable partial discharge detection data according to the identification signal and a preset interference pulse width;
and acquiring a cable partial discharge detection result according to the cable partial discharge detection data after the identification interference data is filtered.
2. The method according to claim 1, wherein before filtering the identification interference data in the cable partial discharge detection data according to the identification signal and a preset interference pulse width, the method comprises:
acquiring pulse interference signals generated when an electronic switch in the preset cable partial discharge detection system is opened and closed in historical data;
and acquiring a preset interference pulse width according to the pulse interference signal.
3. The method of claim 1, wherein the obtaining a preset interference pulse width according to the pulsed interference signal comprises:
and acquiring the preset interference pulse width according to the average value of the pulse interference signals in the preset test time.
4. The method of claim 1, wherein obtaining a detection control signal corresponding to the cable partial discharge detection comprises:
and acquiring a detection control signal corresponding to the partial discharge detection of the cable in a wireless communication mode.
5. The method of claim 1, wherein the detection control signal comprises an ultra low frequency sinusoidal signal.
6. The method according to claim 1, wherein after obtaining the cable partial discharge detection result according to the cable partial discharge detection data after filtering the identification interference data, the method further comprises:
generating a cable partial discharge detection report according to the cable partial discharge detection result;
and feeding back a cable partial discharge detection report.
7. A cable partial discharge detection apparatus based on an ultra low frequency power supply cut-off signal, the apparatus comprising:
the system comprises a signal acquisition module, a signal detection module and a control module, wherein the signal acquisition module is used for acquiring a detection control signal corresponding to the partial discharge detection of the cable, and the detection control signal is generated based on an ultralow frequency power supply cut-off signal;
the signal conversion module is used for converting the detection control signal into an identification signal;
the cable detection module is used for carrying out partial discharge detection on a preset cable to be detected according to the detection control signal to obtain cable partial discharge detection data;
the data filtering module is used for filtering identification interference data in the cable partial discharge detection data according to the identification signal and a preset interference pulse width;
and the performance detection module is used for acquiring a cable partial discharge detection result according to the cable partial discharge detection data after the identification interference data is filtered.
8. The apparatus of claim 7, further comprising a pulse width identification module to:
acquiring a pulse interference signal generated when an electronic switch in the preset cable partial discharge detection system is opened and closed;
and acquiring a preset interference pulse width according to the pulse interference signal.
9. A computer device comprising a memory and a processor, the memory storing a computer program, wherein the processor implements the steps of the method of any one of claims 1 to 6 when executing the computer program.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 6.
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