CN116224194A - Method and system for checking small-current grounding line selection device based on waveform reproduction - Google Patents
Method and system for checking small-current grounding line selection device based on waveform reproduction Download PDFInfo
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- CN116224194A CN116224194A CN202211425210.6A CN202211425210A CN116224194A CN 116224194 A CN116224194 A CN 116224194A CN 202211425210 A CN202211425210 A CN 202211425210A CN 116224194 A CN116224194 A CN 116224194A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The invention belongs to the technical field of device verification, and provides a method and a system for verifying a low-current grounding line selection device based on waveform reproduction, wherein the method comprises the following steps: acquiring real fault voltage and current waveform data; the method comprises the steps of carrying out reproduction on acquired waveform data, selecting partial waveform data in the waveform data to copy according to a time scale, adding the copied partial waveform data to at least one preset position, and carrying out reduction or amplification of the whole amplitude of the waveform data by a preset multiple; checking the low-current grounding line selection device by utilizing the reproduced waveform data; according to the real fault voltage and current waveform data of the actual transformer substation, the waveform data are multiplied and then used for checking the small current line selection device, and the checking precision of the small current line selection device is improved on the basis of truly reflecting the actual faults on site.
Description
Technical Field
The invention belongs to the technical field of device verification, and particularly relates to a method and a system for verifying a low-current grounding line selection device based on waveform reproduction.
Background
The direct-face terminal users of the distribution network are important components of the power system; the distribution line has the characteristics of multiple points, long line, wide range and the like, and the quality of the connecting equipment is uneven, the running environment is changeable, the influence of weather and geography is large, meanwhile, due to the fact that urban and rural construction and development and the power supply condition are complex, the distribution line is extremely easy to be interfered by the outside and damaged by people, the fault rate is always high, and the safe running of the distribution line is influenced at all times. According to statistics, more than 85% of fault power failures are caused by faults of the power distribution network, and single-phase earth faults above the power distribution network account for more than 80% of total fault times of the power distribution network, so that the single-phase earth fault detection of the power distribution network is crucial for safe operation of the whole power system.
At present, in engineering practical application, various small-current line selection devices and relay protection equipment are used for detecting single-phase earth faults of a power distribution network, but due to uncertainty of single-phase earth faults, complexity of line selection problems is quite different from that of a real site, and when the real single-phase earth faults still occur on the site, line selection misoperation or line selection failure occurs due to the fact that the line selection devices or protection equipment which are detected in a laboratory still exist.
The inventor finds that at present, aiming at the inspection of a small-current grounding line selection device, in the prior art, a method for directly adding a relay protection tester or a microcomputer protection tester is most adopted in the field, the method has simple test steps and convenient wiring, however, the zero sequence current output by the method is less, a plurality of electric quantities can not be compared and analyzed at the same time, and only the steady-state fault process of the device can be tested by the adding method of the tester, the test is incomplete, and the voltage and current change condition when the field actually breaks down can not be completely matched; along with the construction and development of a semi-physical simulation platform, such as ADPSS, RTLAB, RTDS and the like, the related current and voltage output by a power amplifier can be controlled in a system modeling mode, the test method is simple and convenient, modeling and simulation can be carried out on different systems, meanwhile, a single-phase grounding transient process of a line can be simulated, a large number of instruments are needed to cooperate in the test mode, the test mode comprises a plurality of power amplifiers, servers, UPS power supplies and the like, and in addition, the test is still based on digital simulation, so that the obtained voltage and current data are theoretical values and the voltage and current quantity generated by the real power distribution network due to faults are quite different; the method has the advantages that voltage and current of single-phase grounding faults of a power distribution network system can be accurately sampled, however, the system built by the test mode is single, the power distribution network is complicated in power supply condition, the outdoor true test field is difficult to simulate other complicated power distribution network conditions, and meanwhile, the construction cost of the outdoor true test field is high.
Disclosure of Invention
In order to solve the problems, the invention provides a method and a system for checking a low-current grounding line selection device based on waveform reproduction.
In order to achieve the above object, the present invention is realized by the following technical scheme:
in a first aspect, the present invention provides a method for checking a low-current grounding line selection device based on waveform reproduction, including:
acquiring real fault voltage and current waveform data;
the method comprises the steps of carrying out reproduction on acquired waveform data, selecting partial waveform data in the waveform data to copy according to a time scale, adding the copied partial waveform data to at least one preset position, and carrying out reduction or amplification of the whole amplitude of the waveform data by a preset multiple;
and checking the low-current grounding line selection device by using the reproduced waveform data.
Further, after the waveform data of the actual fault voltage and current are obtained, preliminary processing is performed, data in a first preset time in an initial area of the waveform data are removed, and data in a second preset time in an end area of the waveform data are removed.
Further, waveform data reproduction includes re-expansion and reproduction multiple setting; then expanding, adding waveform data with preset length, selecting part of waveform data in the waveform data subjected to preliminary processing for copying, setting the time scale of the copied waveform data as integer times of a waveform period, adding a plurality of copied waveform data when the adding position of the copied waveform data is the final moment of the original copied waveform; the reproduction multiple is set to reduce or enlarge the whole amplitude of the waveform data by a preset multiple.
Further, a plurality of fault waveforms are propagated.
Further, transient state and steady state signal fault signals are generated according to the real fault voltage and current waveform data and are used for verifying the low-current grounding line selection device to obtain whether the low-current line selection device has false alarm and/or no-action state after the fault line runs for a preset time.
Further, the actual fault voltage and current waveform data is obtained from a preset database, and the starting, using and modifying settings of the database are respectively and independently encrypted.
In a second aspect, the invention also provides a small-current grounding line selection device inspection system based on waveform reproduction, which comprises a control storage module, and a voltage power amplifier, a current power amplifier and a database which are connected with the control storage module by a user; a software lock is arranged between the control storage module and the database;
a voltage power amplifier configured to: providing voltage for the low-current grounding line selection device;
a current power amplifier configured to: providing current for a low-current grounding line selection device;
a database configured to: storing real fault voltage and current waveform data; and reproducing the waveform data, selecting partial waveform data in the waveform data according to the time scale, copying, adding the copied partial waveform data to at least one preset position, and reducing or amplifying the whole amplitude of the waveform data by a preset multiple.
In a third aspect, the present invention further provides a small current grounding line selection device inspection system based on waveform reproduction, including:
a data acquisition module configured to: acquiring real fault voltage and current waveform data;
a data reproduction module configured to: the method comprises the steps of carrying out reproduction on acquired waveform data, selecting partial waveform data in the waveform data to copy according to a time scale, adding the copied partial waveform data to at least one preset position, and carrying out reduction or amplification of the whole amplitude of the waveform data by a preset multiple;
a verification module configured to: and checking the low-current grounding line selection device by using the reproduced waveform data.
In a fourth aspect, the present invention also provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method for checking a low current ground selection device based on waveform reproduction according to the first aspect.
In a fifth aspect, the present invention further provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the method for checking a low-current grounding line selection device based on waveform reproduction according to the first aspect when the processor executes the program.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the real fault voltage and current waveform data of the actual transformer substation, the waveform data are multiplied and then used for checking the small current line selection device, and the checking precision of the small current line selection device is improved on the basis of truly reflecting the actual faults on the spot;
2. the database provided by the invention needs to be verified by respective independent encryption equipment for starting, using and modifying, so that the original waveform data can be prevented from being tampered, the safety and stability of the data are ensured, the problem of sharing data files can be solved, and convenience is provided for the work of small-current grounding line selection;
3. the invention provides a small-current grounding line selection device checking system based on waveform reproduction, which can generate transient state and steady state signal fault signals through an internal programmable power supply according to real fault voltage and current waveform data of an actual transformer substation and is used for checking the small-current grounding line selection device; the function can check the voltage and current judgment threshold value of the low-current grounding line selection device, and can also spread waves of the stable fault state of the original voltage and current so as to observe whether the low-current line selection device can have false alarm and no-action state after the fault line runs for a period of time;
4. the single-phase grounding signal generating device with the fault waveform capable of being reproduced can check the line selection accuracy of the low-current grounding line selection device; by setting parameters such as a certain running state, running time, a fault mode, ground check times, fault check interval time and the like, the single-phase grounding signal generating device with the fault waveform capable of being reproduced can directly count the line selection condition of the small-current wiring line selection device, and the line selection device comprises relevant information of the accuracy of multiple tests of the line selection device;
5. the invention provides a small-current grounding line selection device inspection system based on waveform reproduction, which has the characteristics of integration, simple structure, portability, simple operation and the like, and is convenient for field practice.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification, illustrate and explain the embodiments and together with the description serve to explain the embodiments.
FIG. 1 is a flow chart of embodiment 1 of the present invention;
FIG. 2 is a schematic diagram of the preliminary processing of waveform data in embodiment 1 of the present invention;
FIG. 3 is a schematic diagram of waveform data reproduction according to embodiment 1 of the present invention;
FIG. 4 is a schematic structural diagram of embodiment 2 of the present invention;
fig. 5 is a schematic diagram of an interface according to embodiment 2 of the present invention.
Detailed Description
The invention will be further described with reference to the drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
The low-current line selection fully-called low-current grounding line selection device is short for low current; is a protection device used in the power industry; the equipment is suitable for single-phase grounding line selection of a 3kV-66kV neutral point non-grounding or neutral point through a resistor and arc suppression coil grounding system, is used for power supply systems of transformer substations of power systems, power plants, hydropower stations, large-scale factories and mining enterprises such as chemical industry, oil extraction, metallurgy, coal, railways and the like, and can indicate lines with single-phase grounding faults. And selecting a small-current grounding fault line, namely a small-current grounding protection line, selecting a line with a grounding fault, and giving an indication signal.
Example 1:
as shown in fig. 1, the present embodiment provides a method for testing a low-current grounding line selection device based on waveform reproduction, including:
acquiring real fault voltage and current waveform data;
the method comprises the steps of carrying out reproduction on acquired waveform data, selecting partial waveform data in the waveform data to copy according to a time scale, adding the copied partial waveform data to at least one preset position, and carrying out reduction or amplification of the whole amplitude of the waveform data by a preset multiple;
and checking the low-current grounding line selection device by using the reproduced waveform data.
In this embodiment, the process of implementing the method for testing the low-current grounding line selection device based on waveform reproduction is mainly implemented by six functional modules, including fault waveform selection and preliminary processing, waveform reproduction setting, setting of multiple fault waveform checks and test interval sequences and test numbers simultaneously, setting of communication connection between the device and the tested device, detection starting and result output.
Fault waveform selection and preliminary processing as shown in fig. 2, the module selects as the original fault waveform to be outputSelecting waveform, acquiring waveform data of real fault voltage and current, performing preliminary processing, removing data in a first preset time in an initial area of the waveform data, and removing data in a second preset time in an end area of the waveform data, wherein the first preset time can be understood as 0-t in fig. 2 1 The time period, the second preset time, can be understood as t in FIG. 2 2 ～t 3 A time period; the original fault waveform data can be selected to access the ground fault waveform database through a connecting software lock, other fault waveforms can be input through a USB interface for processing, and waveforms stored in the single-phase ground signal generating device can be adopted for use. The processing of waveform data is to prune the unusable or useless part of the original fault waveform, and retain useful data, the unusable waveform part is mainly concentrated in the initial area and the end area of the waveform, if there is no useless part, the operation can be omitted; the waveform processing can adopt graphic operation, directly process and modify the waveform by utilizing a scale corresponding to the time scale, and also modify the waveform by setting the time period of the original fault waveform to be processed.
The waveform reproduction setting, as shown in fig. 3, is that the waveform reproduction function is to reproduce the above-mentioned failure waveform data which has been preliminarily processed, and the main setting of the reproduction is re-expansion of the waveform file and the preset multiple change in the amplitude of the waveform. The re-expansion of the waveform file considers that the duration of the common fault record file is short, the action and display condition of the tested device are difficult to observe for a long time or difficult to observe for a long time, therefore, the waveform data with a certain length are artificially set in the background, the adding method is to select the part to be reproduced in the fault waveform which is initially processed for reproduction, the time scale of the reproduced pseudo-reproduced waveform is generally set to be an integer multiple (tn-tm) of the waveform period, the adding position of the pseudo-reproduced waveform is the final moment (tn) of the original reproduced waveform, a plurality of (k) pseudo-reproduced waveforms can be added, and the original follow-up waveforms are sequentially delayed. The function can be extended and set for the same waveform for a plurality of times. The wave form data reproduction multiple is set to reduce or enlarge the whole amplitude of the wave form by a certain multiple, and the wave form data reproduction multiple meets the range requirement. The waveform processing can also adopt a graphical operation, and the waveform is directly processed and modified by a scale corresponding to the time scale, and also can be modified by setting the time period of the original fault waveform to be processed.
And meanwhile, a plurality of fault waveforms are set for verification, and the function can carry out waveform reproduction setting and other processing on the plurality of fault waveforms and carry out output verification at the same time.
The test interval sequence and the test number are set, and the function is to determine the fault number, the occurrence frequency and the test sequence of various waveform tests and set test interval time. The function is set to mainly cope with verification of accuracy of the small-current grounding line selection device by buyers, manufacturers or laboratories; in addition, the transformer substation performs different functions verification or technical supervision on the low-current grounding line selection device.
The device is in communication connection with the tested device, and the function is that the single-phase grounding signal generating device is in communication connection with the small-current grounding line selecting device and is used for analyzing and counting the feedback quantity of the small-current grounding line selecting device.
And detecting starting and outputting a result, wherein the setting is used for testing, and meanwhile, the man-machine exchange interface can be used for displaying related parameters, and a suspension test can be set in the middle of the test.
In the embodiment, transient state and steady state signal fault signals are generated according to the real fault voltage and current waveform data and are used for verifying the low-current grounding line selection device; the waveform data can be reproduced and expanded, and the stable fault state of the original voltage and current is expanded, so that whether the low-current line selection device has false alarm and/or no-action state after the fault line operates for a period of time is observed; the waveform data multiplication multiple can be set, the obtained fault voltage and current data are processed in the device, the voltage and current quantity which can be changed according to a certain multiple is output, and the function can check the voltage and current judgment threshold value of the low-current grounding line selection device; in this embodiment, a fault waveform storage database is also provided, which is used to store and record the actual ground fault waveform data of the transformer substation, and the database needs to be started, used and modified by respective independent encryption devices, such as a dongle for verification, so that the original waveform data can be prevented from being tampered, the security and stability of the data are ensured, the problem of data file sharing can be solved, and convenience is provided for the work of small-current ground line selection.
The embodiment can perform technical supervision and function verification work on the small-current grounding line selection device, and can also perform verification work on the line selection accuracy of the small-current grounding line selection device; by setting parameters such as a certain running state, running time, fault mode, ground check times, fault check interval time and the like, the single-phase grounding signal generating device with the fault waveform capable of being reproduced can directly count the line selection condition of the small-current wiring line selection device, and the line selection device comprises relevant information of the accuracy of multiple tests of the line selection device.
Example 2:
in order to implement the method in embodiment 1, the present embodiment provides a small current grounding line selection device inspection system based on waveform reproduction, as shown in fig. 4, including a control storage module, and a user interface, a voltage power amplifier, a current power amplifier, a software lock and an on-line grounding fault waveform database connected with the controller;
the control memory module is a calculation and memory core of the device and comprises a processor and a memory; the processor can be formed by combining a DSP chip and an FPGA chip, and is mainly used for facilitating the processing and operation of signals; the configuration of the memory needs to match the operation speed of the processor while being able to store sufficient waveform data.
The user interface is a medium for interaction and information exchange between the device and a user, and the user can realize relevant configuration functions through interface operation, including device running conditions, waveform display, waveform reproduction, data storage, function selection, voltage and current setting and the like.
The voltage power amplifier is used for outputting voltage; the requirements at least comprise 1 three-phase voltage output and 1 zero-sequence voltage output, the single-phase steady-state output voltage range is 0-100V, the steady-state highest voltage is not more than 100V, and the higher voltage can be output in a short time; the requirements of good linearity, quick response, high precision, good electromagnetic compatibility, phase accuracy and the like are met, wherein the linearity can reach below 0.1%.
The current power amplifier is used for outputting current; the requirements include at least 5 paths of zero sequence current output, the single-phase steady-state output current range is 0-5A, and higher current can be output in the same short time. The requirements of good linearity, quick response, high precision, good electromagnetic compatibility, no direct current bias, phase accuracy and the like are met, wherein the precision can reach 0.02 percent of error, and can reach 1mA level.
The software lock is used for bearing communication and connection between the single-phase grounding signal generator and the grounding fault waveform database, and accessing the grounding fault waveform database through the software lock; and simultaneously, partial waveform data in the data base is acquired and used by the single-phase grounding signal generating device to be authorized, and the grounding fault waveform data base cannot be accessed without a software lock.
The ground fault waveform database can be realized by cloud storage and other technologies, and stores single-phase ground fault waveforms generated in a real environment, wherein the storable waveform formats are combtrade, csv, binary files and the like.
In this embodiment, the interface structure is shown in fig. 5, and includes three-phase voltage output, zero-sequence voltage output, multiple zero-sequence current output, multiple signal terminal input, software encryption port, debug network port, USB input and output, etc.;
the three-phase voltage output comprises a neutral point and is an output port for providing three-phase voltage for the low-current grounding line selection device. The single-phase voltage value corresponds to the secondary voltage of the voltage transformer, the single-phase output voltage range is 0-100V, and the steady-state highest voltage is not more than 100V.
The zero sequence voltage output comprises a zero sequence voltage loop and provides an output port of zero sequence voltage for the low current grounding line selection device. The zero sequence voltage value corresponds to the voltage of the secondary auxiliary winding of the voltage transformer, the zero sequence voltage output range is 0-100V, and the steady-state highest voltage does not exceed 100V.
The multiple zero sequence current outputs comprise zero sequence current loops and provide zero sequence current output ports for the low current grounding line selection device. Considering that the ground fault criteria of some small-current ground line selection devices are related to the number of outgoing lines, at least 5 pairs of zero-sequence current output ports are arranged, the zero-sequence current value corresponds to the secondary current of the zero-sequence current transformer, the zero-sequence current output range is 0-5A, and the highest current is not more than 5A.
And the plurality of signal terminals are input and used for receiving terminal ports for sending out bus and outgoing tripping signals by the low-current grounding line selection device. Considering that the ground fault criteria of some low-current ground line selection devices are related to the number of outgoing lines, at least 6 signal terminal inputs are arranged, including 1 bus trip signal port and 5 branch trip signal ports.
The software encryption port is used for a dongle installation place. And controlling and processing the set related grounding waveform data through a dongle.
The debugging network port is connected with the network port. The method is used for updating the software and the system in the single-phase grounding signal generating device.
The USB input and output is connected with a peripheral USB device. For outputting relevant test waveform data, correct rate report, etc. from the device, and can read fault waveform data in USB.
The embodiment provides a fault waveform storage database, which is used for storing and recording real ground fault waveform data of a transformer substation, including waveforms, file formats, date and time, places, transformer substation names, transformer substation voltage levels, bus numbers, branch numbers, system types and subsequent ground fault analysis, such as analysis of ground conditions, ground resistances and the like, and can be searched and classified according to the description or the classification. A variety of waveform formats that can be stored, such as combtrade, csv, and binary files;
the device in the embodiment can carry out verification of the line selection result and data acquisition by communicating with the low-current grounding line selection device, and finally directly generates a report, thereby greatly simplifying the work; the device in the embodiment is integrated, simple in structure, easy to carry and simple to operate.
The working method of the system is the same as the detection method of the low-current grounding line selection device based on waveform reproduction in embodiment 1, and is not repeated here.
Example 3:
the embodiment provides a small current grounding line selection device inspection system based on waveform reproduction, which comprises:
a data acquisition module configured to: acquiring real fault voltage and current waveform data;
a data reproduction module configured to: the method comprises the steps of carrying out reproduction on acquired waveform data, selecting partial waveform data in the waveform data to copy according to a time scale, adding the copied partial waveform data to at least one preset position, and carrying out reduction or amplification of the whole amplitude of the waveform data by a preset multiple;
a verification module configured to: and checking the low-current grounding line selection device by using the reproduced waveform data.
The working method of the system is the same as the detection method of the low-current grounding line selection device based on waveform reproduction in embodiment 1, and is not repeated here.
Example 4:
the present embodiment provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the low-current ground selection device inspection method based on waveform reproduction described in embodiment 1.
Example 5:
the present embodiment provides an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the steps of the method for checking a low-current grounding line selection device based on waveform reproduction described in embodiment 1 are implemented when the processor executes the program.
The above description is only a preferred embodiment of the present embodiment, and is not intended to limit the present embodiment, and various modifications and variations can be made to the present embodiment by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment should be included in the protection scope of the present embodiment.
Claims (10)
1. The method for checking the low-current grounding line selection device based on waveform reproduction is characterized by comprising the following steps of:
acquiring real fault voltage and current waveform data;
the method comprises the steps of carrying out reproduction on acquired waveform data, selecting partial waveform data in the waveform data to copy according to a time scale, adding the copied partial waveform data to at least one preset position, and carrying out reduction or amplification of the whole amplitude of the waveform data by a preset multiple;
and checking the low-current grounding line selection device by using the reproduced waveform data.
2. The method for checking a low-current grounding wire selection device based on waveform reproduction according to claim 1, wherein the data in a first preset time in an initial area of waveform data and the data in a second preset time in an end area of waveform data are removed by performing preliminary processing after acquiring waveform data of a real fault voltage and current.
3. The method for checking a low-current ground line selection device based on waveform reproduction according to claim 2, wherein the waveform data reproduction includes re-expansion and reproduction multiple setting; then expanding, adding waveform data with preset length, selecting part of waveform data in the waveform data subjected to preliminary processing for copying, setting the time scale of the copied waveform data as integer times of a waveform period, adding a plurality of copied waveform data when the adding position of the copied waveform data is the final moment of the original copied waveform; the reproduction multiple is set to reduce or enlarge the whole amplitude of the waveform data by a preset multiple.
4. The method for inspecting a low-current ground line selection device based on waveform reproduction according to claim 1, wherein the reproduction is performed on a plurality of fault waveforms.
5. The method for checking a low-current grounding line selection device based on waveform reproduction according to claim 1, wherein transient and steady signal fault signals are generated according to actual fault voltage and current waveform data, and are used for checking the low-current grounding line selection device to obtain whether the low-current line selection device has false alarm and/or no-action state after a fault line runs for a preset time.
6. The method for checking a low-current grounding wire-selecting device based on waveform reproduction according to claim 1, wherein the actual fault voltage current waveform data is obtained from a preset database, and each of the starting, using and modifying settings of the database is individually encrypted.
7. The small-current grounding line selection device inspection system based on waveform reproduction is characterized by comprising a control storage module, and a voltage power amplifier, a current power amplifier and a database which are connected with the control storage module by a user; a software lock is arranged between the control storage module and the database;
a voltage power amplifier configured to: providing voltage for the low-current grounding line selection device;
a current power amplifier configured to: providing current for a low-current grounding line selection device;
a database configured to: storing real fault voltage and current waveform data; and reproducing the waveform data, selecting partial waveform data in the waveform data according to the time scale, copying, adding the copied partial waveform data to at least one preset position, and reducing or amplifying the whole amplitude of the waveform data by a preset multiple.
8. The small-current grounding line selection device inspection system based on waveform reproduction is characterized by comprising:
a data acquisition module configured to: acquiring real fault voltage and current waveform data;
a data reproduction module configured to: the method comprises the steps of carrying out reproduction on acquired waveform data, selecting partial waveform data in the waveform data to copy according to a time scale, adding the copied partial waveform data to at least one preset position, and carrying out reduction or amplification of the whole amplitude of the waveform data by a preset multiple;
a verification module configured to: and checking the low-current grounding line selection device by using the reproduced waveform data.
9. A computer readable storage medium having stored thereon a computer program, which when executed by a processor, implements the steps of a method for checking a low current ground selection device based on waveform propagation as claimed in any one of claims 1 to 7.
10. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method for checking a low current ground line selection device based on waveform reproduction as claimed in any one of claims 1-7 when executing the program.
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| CN202211425210.6A CN116224194A (en) | 2022-11-15 | 2022-11-15 | Method and system for checking small-current grounding line selection device based on waveform reproduction |
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