Partial discharge signal generation method and system, computer device and storage medium

Abstract

The application discloses a partial discharge signal generation method and system, computer equipment and a storage medium, comprising: generating a PRPS atlas, converting the PRPS atlas into a pulse sequence, importing the pulse sequence into a partial discharge signal generation device and saving it locally, obtaining the pulse sequence, analyzing the pulse sequence to convert it into a PRPS atlas, selecting the PRPS atlas, setting output parameters according to the phase coordinates, amplitude coordinates and real-time power frequency information of the PRPS atlas, and outputting corresponding signals. The application can obtain a power frequency in real time, output any very high frequency or high frequency partial discharge signal, has two independent output channels, can simultaneously output very high frequency or high frequency partial discharge signals respectively, the signal type, amplitude, pulse number, carrier frequency and other parameters can be adjusted, and the function test, calibration, sensitivity test, time difference positioning test and partial discharge type identification test of a partial discharge detection device can be realized. The application has multiple function applications such as remote control, cluster work and competition mode.

Description

Technical Field

[0001] This invention relates to the field of partial discharge signal generation technology, and more particularly to methods, systems, computer devices, and storage media for generating partial discharge signals. Background Technology

[0002] A signal generator is a device that provides electrical signals of various frequencies, waveforms, and output levels. It is used as a signal source or excitation source for measuring the amplitude characteristics, frequency characteristics, transmission characteristics, and other electrical parameters of various telecommunications systems or equipment, as well as for measuring the characteristics and parameters of components.

[0003] In the existing technology, most partial discharge signal generators only store a few typical spectra. The ultra-high frequency and high frequency signals output based on the fixed power frequency are relatively simple and cannot meet the requirements of test diversity and accuracy. In the process of realizing arbitrary ultra-high frequency and high frequency signals, it is not possible to convert the acquired PRPS spectrum data into pulse signals well. Summary of the Invention

[0004] The purpose of this invention is to provide a method, system, computer device, and storage medium for generating partial discharge signals, in order to solve the problem that partial discharge signal generators can only output fixed waveforms.

[0005] A method for generating a partial discharge signal, comprising:

[0006] Step S101: Generate PRPS spectrum; Measure real electrical signal data, plot PRPD spectrum on partial discharge analysis unit, set the number of cycles, number of pulses and distribution mode, and generate the corresponding PRPS spectrum;

[0007] Step S102: Convert the PRPS spectrum into a pulse sequence; obtain the real-time power frequency; convert the PRPS spectrum data into a two-dimensional array pulse sequence data; output the pulse sequence according to the amplitude and time interval of each pulse; and import the pulse sequence into the partial discharge signal generating device and save it locally.

[0008] Step S103: Obtain the pulse sequence and parse the pulse sequence to convert it into a PRPS spectrum;

[0009] Step S104: Select the PRPS spectrum, set the output parameters according to the phase coordinates, amplitude coordinates and real-time power frequency information of the PRPS spectrum, and output the corresponding signal.

[0010] Preferably, the pulse sequence data is set to A[n], T[n], where: A[n] is the amplitude of n pulses, and T[n] is the time difference between the nth pulse and the (n-1)th pulse; the PRPS spectrum data format is set to d[p][m], the time of each power frequency cycle of the PRPS spectrum two-dimensional array is divided into m intervals, and d[p][m] is the amplitude of the ultra-high frequency signal in the m-th interval of the p-th cycle;

[0011] Preferably, the specific method for converting the PRPS spectral data into two-dimensional array pulse sequence data is as follows:

[0012] Step S1021: Initialize the number of pulses c and the pulse interval t, so that c = 0 and t = 0;

[0013] Step S1022: Obtain the power frequency f and pulse interval resolution 1 / f / m in the current cycle p;

[0014] Step S1023: Iterate through the m-th interval of the p-th power frequency cycle in the PRPS spectrum data d[p][m]. If there is no pulse in the interval, the pulse interval is continuously increased by the pulse interval resolution 1 / f / m until the next interval with a pulse is reached.

[0015] If a pulse exists within this interval, the pulse interval is increased by the pulse interval resolution 1 / f / m, and a pulse A[c],T[c] is added to the pulse sequence, where A[c]=d[p][m],T[c]=t; the number of pulses c is incremented by 1, t is reset to zero, and the process continues to traverse the (m+1)th interval of the p-th power frequency cycle.

[0016] Step S1024: When one power frequency cycle is completed, i.e., m reaches its maximum value, the current power frequency f is obtained again, and the current pulse interval resolution 1 / f / m is recalculated; repeat step S1023 to continue traversing the next power frequency cycle until the power frequency cycle reaches its maximum value, and then end.

[0017] Preferably, the step of drawing the PRPD map specifically involves:

[0018] Step S1011: Create a new spectrum on the partial discharge analysis unit and modify its name;

[0019] Step S1012: Set the map type;

[0020] Step S1013: Add a graphic selection area;

[0021] Step S1014: Set parameters for the selected graphic area.

[0022] Preferably, in step S101, the PRPS spectrum types include: suspension discharge, surface discharge, air gap discharge, corona discharge, noise signal, and mixed signal.

[0023] Preferably, in step S104, the output parameter setting types include: synchronization mode, synchronization frequency, spectrum type, output signal frequency, and signal delay;

[0024] In step S104, the signal output modes include: continuous output, intermittent output, and time difference output.

[0025] A partial discharge signal generation system, comprising:

[0026] The spectrum generation and conversion module is used to generate PRPS spectra and convert PRPS spectra into pulse sequences;

[0027] The network module is used to transmit the pulse series via WIFI or USB connection;

[0028] The storage module is used to store the pulse series within the partial discharge signal generating device;

[0029] The analysis module is used to analyze pulse series and convert them into PRPS spectra;

[0030] The control module is used to set the output parameters so that the signal is output according to a specific phase and amplitude.

[0031] The output module is used to output the signal corresponding to the phase and amplitude of the PRPS spectrum.

[0032] A computer device includes a processor and a memory, the memory storing at least one program that is loaded and executed by the processor to implement the partial discharge signal generation method described above.

[0033] A computer-readable storage medium storing at least one program, which is loaded and executed by a processor to implement the partial discharge signal generation method described above.

[0034] The present invention has the following technical effects:

[0035] 1. Real-time acquisition of power frequency, capable of outputting arbitrary ultra-high frequency or high frequency partial discharge signals;

[0036] 2. It has two independent output channels, which can simultaneously output ultra-high frequency or high frequency partial discharge signals respectively. The signal type, amplitude, number of pulses, carrier frequency and other parameters are adjustable.

[0037] 3. Supports the creation of custom spectra or the import of spectra from actual field testing, and generates specific UHF and HF signals based on the input spectra;

[0038] 4. Supports the input and output of synchronization signals, enabling functional testing, calibration, sensitivity testing, time difference positioning testing, and partial discharge type identification testing of partial discharge detection equipment.

[0039] 5. It can realize a variety of functions such as remote control, cluster operation, and competition mode. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the method flow of the present invention;

[0041] Figure 2 This is a schematic diagram of the process of converting PRPS spectral data into pulse sequences according to the present invention;

[0042] Figure 3 This is a schematic diagram of the system connection of the present invention. Detailed Implementation

[0043] The technical solution of the present invention will be further described below with reference to the embodiments and accompanying drawings.

[0044] PRPS is a partial discharge pulse signal spectrum, which displays the phased pulse signals generated by partial discharge in a three-dimensional coordinate system in chronological order; PRPD is a partial discharge phase distribution spectrum, which displays the pulse signals (carrying phase) generated by partial discharge in a two-dimensional coordinate system; the PRPD spectrum can be regarded as the long-term accumulation of the PRPS spectrum on the power frequency period-amplitude plane, and is an important basis for judging the type of partial discharge.

[0045] Example 1

[0046] This embodiment provides a method for generating partial discharge signals, including:

[0047] Step S101: Generate PRPS map;

[0048] Step S102: Convert the PRPS spectrum into a pulse sequence, import the pulse sequence into the partial discharge signal generating device and save it locally;

[0049] Step S103: Obtain the pulse sequence and parse the pulse sequence to convert it into a PRPS spectrum;

[0050] Step S104: Select the PRPS spectrum, set the output parameters according to the phase coordinates, amplitude coordinates and real-time power frequency information of the PRPS spectrum, and output the corresponding signal.

[0051] To address the problem that existing partial discharge signal generators can only output fixed ultra-high frequency and high frequency signals, this invention discloses a method for generating partial discharge signals. In the partial discharge analysis unit (i.e., the host computer software), a PRPS spectrum is generated, and the PRPS spectrum containing amplitude and phase information is converted into pulse sequence data for transmission to the partial discharge signal generating device and stored locally. When a signal output is needed, the real-time power frequency is acquired, the spectrum and type are selected on the partial discharge signal device, the pulse sequence is parsed into a PRPS spectrum, and the synchronization mode, synchronization frequency, and maximum amplitude are set. The channel delay between two channels can also be set, and then the signal is output.

[0052] In a further embodiment of this example, the PRPS map generation method in step S101 includes:

[0053] Plot the PRPD spectrum on the partial discharge analysis unit, set the number of cycles, the number of pulses and the distribution mode, and generate the corresponding PRPS spectrum;

[0054] Import the actual partial discharge spectrum from the field test into the partial discharge analysis unit to obtain the corresponding PRPS spectrum.

[0055] In a further implementation of this embodiment, step S102, converting the PRPS spectrum into a pulse sequence, specifically involves acquiring the real-time power frequency, converting the PRPS spectrum data into a two-dimensional array pulse sequence data, and outputting it sequentially according to the amplitude and time interval of each pulse in the pulse sequence.

[0056] According to the data specifications, the PRPD and PRPS spectrum data of the UHF partial discharge field detection data are stored in the data file in the form of a two-dimensional array. Since the PRPS spectrum is a pulse sequence spectrum, the PRPS spectrum in the data file can be converted into a recognizable pulse sequence, thereby outputting the UHF pulse sequence corresponding to the PRPS spectrum in the data file.

[0057] In a further embodiment of this example, the pulse sequence data is set as {A[n], T[n]}, where: A[n] is the amplitude of n pulses, and T[n] is the time difference between the nth pulse and the (n-1)th pulse.

[0058] Table 1 shows the data storage format for UHF partial discharge detection. The partial discharge spectrum data storage format is set to d[m][n] or d[p][m]. The two-dimensional array d[p][m] of the PRPS spectrum corresponds to the distribution of the UHF signal in each power frequency cycle during the p power frequency cycle of the partial discharge signal detection period. The time of each power frequency cycle is divided into m intervals. The value of d[p][m] represents the amplitude of the UHF signal in the m-th interval of the p-th cycle, in dBm. If no UHF pulse is detected in a certain interval of a certain cycle, the signal amplitude at that point is set to Float.NaN; if multiple UHF pulses are detected in a certain interval of a certain cycle, the signal amplitude in that interval is set to the amplitude of the largest pulse.

[0059] Table 1 Data storage format for UHF partial discharge detection.

[0060]

[0061]

[0062]

[0063] When converting the PRPS spectrum into a pulse sequence, the current power frequency is first obtained from the power frequency synchronization module to obtain the current pulse interval resolution 1 / f / m. Then, the m intervals of the PRPS spectrum data d[p][m] for p power frequency cycles are traversed sequentially in an m-priority manner: if there is a pulse in the interval (d≠Float.NaN), a pulse [A,T] is added to the pulse sequence, where the amplitude A is the d value at that point, and the time T is the time difference between the pulse and the previous pulse (number of intervals * interval resolution). If there is no pulse in the interval (d=Float.NaN), the pulse interval counter is incremented until the next interval with a pulse is reached. Each time a power frequency cycle is traversed, the current power frequency is re-obtained, and the current pulse interval resolution is recalculated to ensure that the output pulse sequence is synchronized with the current power grid frequency.

[0064] In a further implementation of this embodiment, the drawing of the PRPD map specifically involves:

[0065] Step S1011: In the partial discharge analysis unit, create a new spectrum in the self-built spectrum settings window and modify its name;

[0066] Step S1012: Set the spectrum type to UHF (Ultra-High Frequency) or HF (High Frequency);

[0067] Specifically, the output amplitude range of ultra-high frequency signals is -80 to 0 dBm (dBm is a value that measures the absolute value of power, and the calculation formula is: 10lg(power value / 1mw)), and the output range of high frequency is 3 to 3000mV.

[0068] Step S1013: Add a graphic selection. "Ctrl + left mouse button" can be used to add new control points to the selected graphic selection, or to add the center of gravity of the graphic selection. The graphic selection can be selected by long-pressing the left mouse button and moved. A single graphic selection can be copied, or multiple selections can be aligned. Multiple graphic selections can be added.

[0069] Step S1014: Set the pulse number, distribution type, and distribution period for the selected graphic area. The distribution type can be set to average distribution, relative centroid normal distribution, normal distribution (amplitude), and normal distribution (phase).

[0070] The actual partial discharge spectrum from the field test is imported into the partial discharge analysis unit as an ms, msrt, or dat file, and then transmitted to the partial discharge signal generating device via WIFI or USB data connection. The partial discharge signal generating device contains several classic partial discharge spectra that can be used directly.

[0071] The partial discharge analysis unit supports browsing both imported PRPD and PRPS maps. PRPD maps can be used directly or edited and optimized, for example: ① modifying the PRPD map name and type, which will be updated synchronously in the list and displayed maps; ② setting the maximum and minimum scales of the PRPD map and performing phase shifting; ③ deleting unnecessary areas, such as background or interference signals.

[0072] Import the actual partial discharge spectrum from the field test into the partial discharge analysis unit to obtain the corresponding PRPD and PRPS spectra.

[0073] In a further embodiment of this example, in step S101, the PRPS spectrum types include: suspension discharge, surface discharge, air gap discharge, corona discharge, noise signal, and mixed signal.

[0074] In a further implementation of this embodiment, in step S104, the output parameter setting type includes: synchronization mode, synchronization frequency, spectrum type, output signal frequency, and signal delay. When two channels output the same spectrum simultaneously, the time difference between the output signals of the two channels is controlled by setting the channel delay.

[0075] In step S104, the signal output modes include: continuous output, intermittent output, and time difference output; intermittent output supports multiple intermittent signal output modes.

[0076] Example 2: This example provides a partial discharge signal generation system, including:

[0077] The spectrum generation and conversion module is used to generate PRPS spectra and convert PRPS spectra into pulse sequences;

[0078] The network module is used to transmit the pulse series via WIFI or USB connection;

[0079] The storage module is used to store the pulse series within the partial discharge signal generating device;

[0080] The analysis module is used to analyze pulse series and convert them into PRPS spectra;

[0081] The control module is used to set the output parameters so that the signal is output according to a specific phase and amplitude.

[0082] The output module is used to output the signal corresponding to the phase and amplitude of the PRPS spectrum.

[0083] After the spectrum generation and conversion module generates the PRPD spectrum and the corresponding PRPS spectrum, it outputs them to the storage module through the network module and saves the pulse series therein. The parsing module parses the pulse series and converts it into a PRPS spectrum. Then, the control module sets the output parameters of the PRPS spectrum, thereby outputting a specific analog signal in the output module, thus realizing the output of ultra-high frequency and high frequency signals with arbitrary amplitude and phase.

[0084] Example 3: This example provides a computer device, which includes a central processing unit (CPU), a system memory including random access memory (RAM) and read-only memory (ROM), and a system bus connecting the system memory and the CPU. The computer device may also include a basic input / output (I / O) system to facilitate information transfer between various components within the computer, and a mass storage device for storing the operating system, applications, and other program modules.

[0085] The computer-readable medium may include computer storage media and communication media. Computer storage media includes volatile and non-volatile, removable and non-removable media implemented using any method or technology for storing information such as computer-readable instructions, data structures, program modules, or other data. Computer storage media includes random access memory (RAM), read-only memory (ROM), flash memory or other solid-state storage technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic tape cassettes, magnetic tape, disk storage or other magnetic storage devices, collectively referred to as memory.

[0086] The memory stores one or more programs, which are configured to be executed by one or more central processing units. The one or more programs contain instructions for implementing the above-described method, and the central processing unit executes the one or more programs to implement the method provided in Embodiment 1.

[0087] The memory further includes one or more programs stored in the memory, and the one or more programs include steps performed by a computer device in the method provided in Embodiment 1 of this application.

[0088] Example 4: This example provides a computer-readable storage medium storing at least one program, which is loaded and executed by a processor to implement the partial discharge signal generation method as described in Example 1.

[0089] All or part of the steps in the various methods of the above embodiments can be implemented by a program instructing related hardware. This program can be stored in a computer-readable storage medium, which may be a computer-readable storage medium included in the memory described in the above embodiments; or it may be a standalone computer-readable storage medium not assembled into the terminal. The computer-readable storage medium stores at least one instruction, at least one program segment, a code set, or an instruction set. The at least one instruction, the at least one program segment, the code set, or the instruction set is loaded and executed by a processor to implement the partial discharge signal generation method described in Embodiment 1.

[0090] The order of the above embodiments is for ease of description only and does not represent the superiority or inferiority of the embodiments.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for generating a partial discharge signal, characterized in that, include: Step S101: Generate PRPS spectrum; Measure real electrical signal data, plot PRPD spectrum on partial discharge analysis unit, set the number of cycles, number of pulses and distribution mode, and generate the corresponding PRPS spectrum; Step S102: Convert the PRPS spectrum into a pulse sequence; obtain the real-time power frequency; convert the PRPS spectrum data into a two-dimensional array pulse sequence data; output the pulse sequence according to the amplitude and time interval of each pulse; and import the pulse sequence into the partial discharge signal generating device and save it locally. Step S103: Obtain the pulse sequence and parse the pulse sequence to convert it into a PRPS spectrum; Step S104: Select the PRPS spectrum, set the output parameters according to the phase coordinates, amplitude coordinates and real-time power frequency information of the PRPS spectrum, and output the corresponding signal.

2. The partial discharge signal generation method according to claim 1, characterized in that, The pulse sequence data is set as A[n], T[n], where: A[n] is the amplitude of n pulses, and T[n] is the time difference between the nth pulse and the (n-1)th pulse; the PRPS spectrum data format is set as d[p][m], and the time of each power frequency cycle of the PRPS spectrum two-dimensional array is divided into m intervals on average, where d[p][m] is the amplitude of the ultra-high frequency signal in the m-th interval of the p-th cycle.

3. The partial discharge signal generation method according to claim 1, characterized in that, The specific method for converting the PRPS spectral data into two-dimensional array pulse sequence data is as follows: Step S1021: Initialize the number of pulses c and the pulse interval t, so that c=0 and t=0; Step S1022: Obtain the power frequency f and pulse interval resolution 1 / f / m in the current cycle p; Step S1023: Iterate through the m-th interval of the p-th power frequency cycle in the PRPS spectrum data d[p][m]. If there is no pulse in the interval, the pulse interval is continuously increased by the pulse interval resolution 1 / f / m until the next interval with a pulse is reached. If a pulse exists within this interval, the pulse interval is increased by the pulse interval resolution 1 / f / m, and a pulse A[c],T[c] is added to the pulse sequence, where A[c]=d[p][m],T[c]=t; the number of pulses c is incremented by 1, t is reset to zero, and the process continues to traverse the (m+1)th interval of the p-th power frequency cycle. Step S1024: When one power frequency cycle is completed, i.e., m reaches its maximum value, the current power frequency f is obtained again, and the current pulse interval resolution 1 / f / m is recalculated; repeat step S1023 to continue traversing the next power frequency cycle until the power frequency cycle reaches its maximum value, and then end.

4. The partial discharge signal generation method according to claim 1, characterized in that, The specific steps for drawing the PRPD map are as follows: Step S1011: Create a new spectrum on the partial discharge analysis unit and modify its name; Step S1012: Set the map type; Step S1013: Add a graphic selection area; Step S1014: Set parameters for the selected graphic area.

5. The partial discharge signal generation method according to claim 1, characterized in that, In step S101, the PRPS spectrum types include: suspension discharge, surface discharge, air gap discharge, corona discharge, noise signal, and mixed signal.

6. The partial discharge signal generation method according to claim 1, characterized in that, In step S104, the output parameter setting types include: synchronization mode, synchronization frequency, spectrum type, output signal frequency, and signal delay; In step S104, the signal output modes include: continuous output, intermittent output, and time difference output.

7. A partial discharge signal generation system, characterized in that, The partial discharge signal generation method according to claim 1 includes: The spectrum generation and conversion module is used to generate PRPS spectra and convert PRPS spectra into pulse sequences; The network module is used to transmit the pulse series via WIFI or USB connection; The storage module is used to store the pulse series within the partial discharge signal generating device; The analysis module is used to analyze pulse series and convert them into PRPS spectra; The control module is used to set the output parameters so that the signal is output according to a specific phase and amplitude. The output module is used to output the signal corresponding to the phase and amplitude of the PRPS spectrum.

8. A computer device, characterized in that, The computer device includes a processor and a memory, the memory storing at least one program, which is loaded and executed by the processor to implement the partial discharge signal generation method as described in any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one program, which is loaded and executed by a processor to implement the partial discharge signal generation method as described in any one of claims 1 to 7.

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