An integrated design method and system for intelligent wave recording and traveling wave ranging

Abstract

The present invention discloses an integrated design method and system for intelligent wave recording and traveling wave ranging, which relates to the technical field of power system, including heterogeneous data fusion processing, including hardware isolation and independent acquisition, clock synchronization mechanism, data caching and alignment, data format standardization, algorithm optimization and fusion, and data verification and correction; large-capacity, multi-backup hybrid storage, including a combination of multiple storage media, data redundancy backup and improved data reliability; startup based on multivariate information acquisition, including analog startup, switch startup, GOOSE message startup and station control layer message startup; comprehensive ranging algorithm, including the establishment of electromagnetic circuit framework model, the construction of comprehensive ranging model, the optimization algorithm to solve the objective function, the correction of the preliminary fault point coordinate estimation value, the realization of the power fault precise positioning system, and the support of computer equipment and storage media. The present invention solves the problem of single recorded data and improves the data processing speed and system flexibility.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power systems, and in particular to an integrated design method and system for intelligent wave recording and traveling wave ranging. Background Art

[0002] In the existing smart substation monitoring equipment, the collection of power frequency signals and traveling wave signals is realized on two devices, the smart recorder and the traveling wave ranging device, respectively. That is, the smart recorder completes the recording of power frequency signal data, while the traveling wave ranging device realizes the recording of traveling wave signal data; the "Q / CSG1203081-2021 Technical Specifications for Smart Recorders" of the State Grid Corporation of China stipulates that 110kV and above substations should be equipped with smart recorders; the relevant technical specifications of the State Grid Corporation of China stipulate that 500kV and above AC lines, 220kV lines exceeding 50km, or 220kV and above lines maintained by multiple units should be equipped with traveling wave ranging devices, and other 220kV AC lines that are difficult to patrol should be equipped with traveling wave ranging devices.

[0003] Intelligent oscilloscope recorders and traveling wave ranging devices both play an important role in smart substations. The two devices have their own advantages and overlap in functions, especially the two devices each have a set of transmission and sampling systems, which leads to complex wiring of equipment in the station, high equipment cost, high maintenance cost, and overlapping equipment functions. Moreover, the current intelligent oscilloscope recorders and traveling wave ranging devices cannot provide a theoretical basis and equipment support for the distance positioning of fault points of faulty lines in the power system, especially the problems of large equipment investment consumption and dispersed functional structure cannot be effectively solved for the time being.

[0004] Therefore, developing an integrated design method and system for intelligent wave recording and traveling wave ranging to realize the recording and analysis functions of power frequency fault data and high-frequency traveling wave data will help meet the needs of power system development, overcome the limitations of redundant device functions and decentralized structure, and improve the reliability and intelligence level of the power grid. Summary of the invention

[0005] In view of the above-mentioned problems, the present invention is proposed.

[0006] Therefore, the problem to be solved by the present invention is how to provide an integrated design method and system for intelligent recording and traveling wave ranging to realize the recording and analysis functions of industrial frequency fault data and high-frequency traveling wave data, which will help meet the needs of power system development, overcome the limitations of redundant device functions and decentralized structure, and improve the reliability and intelligence level of the power grid.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] In the first aspect, an embodiment of the present invention provides an integrated design method for intelligent wave recording and traveling wave ranging, which includes heterogeneous data fusion processing, including hardware isolation and independent acquisition, clock synchronization mechanism, data caching and alignment, data format standardization, algorithm optimization and fusion, and data verification and correction; large-capacity, multi-backup hybrid storage, including a combination of multiple storage media, data redundant backup and improved data reliability; startup based on multi-information collection, including analog startup, switch startup, GOOSE message startup and station control layer message startup; comprehensive ranging algorithm, including the establishment of an electromagnetic-circuit framework model, the construction of a comprehensive ranging model, the optimization algorithm for solving the objective function, the correction of the preliminary fault point coordinate estimate, the implementation of a power fault precise positioning system, and the support of computer equipment and storage media.

[0009] As a preferred solution of the integrated design method of intelligent wave recording and traveling wave ranging described in the present invention, the specific steps of the heterogeneous data fusion processing are as follows: for signals with different sampling rates, the frequency bands are divided by hardware isolation, and then independent acquisition circuits are used for data acquisition; a high-precision clock synchronization system is used to ensure the time synchronization of each acquisition channel, even if the sampling rates are different, through accurate time marking, it can be aligned and integrated in subsequent data processing; in the acquisition process, data with different sampling rates are cached, and in subsequent data processing, the data are aligned and integrated according to time marking or other synchronization information; a unified data format is used to store and transmit data with different sampling rates to ensure the compatibility and comprehensibility of data between different modules and systems; in the data processing algorithm, the characteristics of data with different sampling rates are fully considered, optimized and integrated, and in the fault analysis and ranging algorithms, the information provided by data with different sampling rates is reasonably used; the collected data is verified and corrected to ensure the accuracy and reliability of the data, and if the data is found to be abnormal or inconsistent, it is processed by data cleaning, repair or re-acquisition.

[0010] As a preferred solution of the integrated design method of intelligent wave recording and traveling wave ranging described in the present invention, the specific steps of the large-capacity, multi-backup hybrid storage are as follows: the combination of multiple storage media includes the use of a combination of front-end high-speed storage and rear-end large-capacity storage to achieve safe and efficient storage, the front-end high-speed storage is implemented by NAND, which is suitable for storing transient data that is frequently read and written; the rear-end large-capacity storage is implemented by a high-performance hard disk, which is suitable for storing long-term recording files; data redundancy backup includes that in order to fully ensure the security of the recording data, the system will perform multiple backup storage of the data, that is, the same data will be stored in multiple storage media at the same time to prevent data loss due to failure of a single storage medium; improving data reliability includes using multiple backup storage to improve data reliability. Even if there is a problem with a storage medium, data can still be restored from other backups to ensure the smooth progress of fault analysis and diagnosis.

[0011] As a preferred solution of the integrated design method of intelligent wave recording and traveling wave ranging described in the present invention, the specific steps of the startup based on multi-information collection are as follows: the acquisition unit monitors the analog quantity in the substation in real time, including voltage and current. When the analog quantity exceeds the set threshold, the device will start the wave recording or traveling wave ranging function; monitor the state change of the switch quantity of the circuit breaker or knife switch, and when the switch quantity suddenly changes, the device will start the corresponding function; receive and parse the GOOSE message, and judge according to the switch quantity state information and action information in the message. When the data set in the GOOSE message changes and meets the startup conditions, the device starts; perform real-time analysis on the station control layer message, and when the station control layer message is abnormal, the device starts; the startup based on multi-information collection also includes: when a certain type of startup mode is triggered in the analog quantity startup, switch quantity startup, GOOSE message startup and station control layer message startup, the status of the other three types of startup modes is judged. If within T1 time after the triggering of this type of startup mode, the other three types of startup modes If none of the three types of start-up methods are triggered, it is determined that the startup credibility is low, the device does not start, and a first-level alarm signal is sent to the operation and maintenance personnel to prompt them to perform device maintenance; if within T1 time after the triggering of this type of start-up method, only one or two of the other three types of start-up methods are triggered, it is determined that the startup credibility is medium, and a second-level alarm signal is sent to the operation and maintenance personnel to prompt them to track the status, and judge the status of the other three types of start-up methods within T2 time after the triggering of this type of start-up method; if within T2 time after the triggering of this type of start-up method, only one or two of the other three types of start-up methods are still triggered, a first-level alarm signal is sent to the operation and maintenance personnel to prompt them to perform device maintenance; if within T2 time after the triggering of this type of start-up method, the other three types of start-up methods have been triggered, the device starts, and a second-level alarm signal is sent to the operation and maintenance personnel to prompt them to track the status; if within T1 time after the triggering of this type of start-up method, the other three types of start-up methods have been triggered, it is determined that the startup credibility is high, the device starts, and the startup information is recorded.

[0012] As a preferred solution of the integrated design method of intelligent wave recording and traveling wave ranging described in the present invention, the specific steps of the comprehensive ranging algorithm are as follows: based on field theory and electromagnetic theory, an electromagnetic-circuit framework model is constructed to describe the propagation law of electromagnetic waves in transmission lines and their coupling phenomenon with circuit elements. The electromagnetic-circuit framework model uses Maxwell's equations to describe the propagation law of electromagnetic waves, and couples through the boundary conditions of electromagnetic fields and circuit elements; based on the electromagnetic-circuit framework model, a comprehensive ranging model combining traveling wave ranging and wave recording ranging is constructed. The comprehensive ranging model comprehensively considers line parameters, topological structure, distribution parameters and fractionation branch factors and constructs an objective function; the objective function of the comprehensive ranging model is solved by an optimization algorithm to obtain a preliminary fault point coordinate estimate, and a particle swarm optimization algorithm is used to iterate the fault point coordinate estimate. Solve the objective function, and when the objective function reaches the minimum value, obtain the preliminary fault point coordinate estimate; correct the preliminary fault point coordinate estimate, and use the weighted average correction method to correct it to obtain the final fault point coordinate value. This process includes summarizing all preliminary fault point coordinate estimates, assigning an accuracy score to each preliminary fault point coordinate estimate, and then calculating the corrected preliminary fault point coordinates; the power fault precise positioning system includes a first model building module, a second model building module, an optimization algorithm solving module, a correction and verification module, and a data processing and analysis module to achieve precise positioning of faults in the power system; the support of computer equipment and storage media includes being implemented through computer equipment and computer-readable storage media, wherein the computer program executes the steps of the power fault precise positioning system.

[0013] In the second aspect, in order to further solve the safety problems existing in the power system, the embodiment of the present invention provides an integrated design system of intelligent wave recording and traveling wave ranging, which includes: an acquisition unit and a management unit; the acquisition unit includes a power supply module, an integrated transmission module, an analog quantity acquisition module, a traveling wave acquisition module, an optical port module, a data acquisition module, a data processing module and a background analysis module; the management unit includes a host module and a display module.

[0014] As a preferred solution of the integrated design system of intelligent wave recording and traveling wave ranging described in the present invention, wherein: the acquisition unit transmits the electrical quantity signal to the traveling wave acquisition board and the analog quantity acquisition board for processing through the integrated transmission module, realizes the synchronous sampling of the industrial frequency and traveling wave data, realizes the intelligent station message reception and analysis through the optical port board, and collects the switch quantity data through the switch quantity acquisition board. The system also has a satellite timing function to realize the accurate processing of the sampling time stamp; the product front panel of the acquisition unit includes indicator lights, buttons and USB interface, and the rear panel interface is used to access analog quantity, switch quantity, traveling wave electrical quantity and intelligent station network message data; the acquisition unit is used to collect analog quantity, traveling wave data, switch quantity and communication message, and has the functions of wave recording file generation, traveling wave file generation, comprehensive ranging, network message analysis and communication.

[0015] As a preferred solution of the integrated design system of intelligent wave recording and traveling wave ranging described in the present invention, the management unit obtains remote signaling, telemetry, wave recording files, traveling wave files, archive files and fixed value file data from the protection device and the acquisition unit through MMS and GOOSE, and uniformly processes and stores them through the data center. Each business module obtains data through the data center, performs logical operations of its own business module, and completes visual display and intelligent operation and maintenance; the management unit is used to realize wave recording file analysis, traveling wave file analysis, network message analysis and result display, secondary system visualization and intelligent operation and maintenance functions.

[0016] In a third aspect, an embodiment of the present invention provides a computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: when the computer program is executed by the processor, any step of the integrated design method of intelligent wave recording and traveling wave ranging as described in the first aspect of the present invention is implemented.

[0017] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein: when the computer program is executed by a processor, any step of the integrated design method of intelligent wave recording and traveling wave ranging as described in the first aspect of the present invention is implemented.

[0018] Beneficial effects of the present invention: the present invention improves the integration level of the device, the intelligent recorder has the functions of recording, network division, secondary system visualization and intelligent operation and maintenance, and on this basis, the intelligent recording and traveling wave ranging device further integrates the traveling wave function, which is in line with the development trend of intelligent recorders, is conducive to the comprehensive collection of information within the station, and can further improve the integration level of the device; through the innovative use of a comprehensive ranging algorithm, according to the first influencing factors such as line parameters, topological structure, distribution parameters and fractionation branches, based on the electromagnetic-circuit framework model, a comprehensive ranging model combining traveling wave ranging and recording ranging is constructed, the objective function is solved by the optimization algorithm, and the preliminary fault point coordinate estimate is obtained. The method combining accurate simulation, intelligent analysis and effective correction achieves high accuracy and high efficiency in locating faults in power systems; the present invention improves the ranging accuracy. Since the impedance ranging method is easily affected by transition resistance and the inrush current at the opposite end, there is a problem of insufficient ranging accuracy. According to the first influencing factors such as line parameters, topological structure, distribution parameters and fractionation branches, a comprehensive ranging model combining traveling wave ranging and recording wave ranging is constructed based on the electromagnetic-circuit framework model. The objective function is solved by the optimization algorithm to obtain the preliminary fault point coordinate estimation value. ... In order to overcome the shortcomings of false start-up of the device and single recorded data, the intelligent wave recording and traveling wave ranging device has taken a variety of measures, adopting the intelligent station linkage technology to effectively avoid the false start of the whole station, and improve the problem that the existing device is easily disturbed by clutter and false start. When a fault occurs, it can quickly and accurately locate the fault point, thereby avoiding unnecessary equipment startup and reducing the possibility of false start; the present invention adopts the synchronous acquisition technology of industrial frequency wave recording data and high-frequency traveling wave data to achieve efficient processing and analysis of different types of data, and solves the problem of single recorded data. This synchronous acquisition is crucial for quickly and accurately diagnosing power system faults, and improves The wavelet algorithm is improved, and the parameters in the calculation steps are optimized and improved to make the calculation more efficient, which is helpful to improve the data processing speed and meet the requirements for high-speed data processing in traveling wave ranging. The key process is implemented using FPGA, which improves the data calculation efficiency, reduces the cost, and improves the flexibility and scalability of the system. The present invention reduces the equipment cost and operation and maintenance difficulty, and improves the reliability of the power system. The device has a high degree of integration, greatly reduces the station-level investment, and can reduce the operation and maintenance cost, simplify the maintenance and management process of the equipment, and the intelligent recording and traveling wave ranging device can achieve more comprehensive and accurate fault analysis and positioning, timely discover and eliminate faults, and improve the reliability and stability of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0020] Figure 1 This is a schematic diagram of the collection system principle in Example 1.

[0021] Figure 2 This is a schematic diagram of the storage system flow in Example 1.

[0022] Figure 3 This is a flow chart of distance measurement analysis of the management unit in Example 1.

[0023] Figure 4 This is a view of the traveling wave ranging and positioning model in Example 1.

[0024] Figure 5 This is a diagram of the comprehensive ranging process in Example 1.

[0025] Figure 6 This is a schematic diagram of the intra-station communication mode of the intelligent wave recording and traveling wave ranging device in Example 2.

[0026] Figure 7 This is a schematic diagram of the typical physical deployment of the intelligent wave recording and traveling wave ranging device of the 220kV intelligent station in Example 4.

[0027] Figure 8 This is a system block diagram of the acquisition unit in Example 4.

[0028] Fig. 9 This is a schematic view of the front panel of the acquisition unit in Example 4.

[0029] Fig.10 This is a schematic view of the rear panel of the collection unit in Example 4.

[0030] Fig.11 This is a schematic diagram of the management unit system in Example 4.

[0031] Fig.12 This is the management unit view in Example 4. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0035] Example 1

[0036] Reference Figure 1~Figure 5 , which is the first embodiment of the present invention, provides an integrated design method for intelligent wave recording and traveling wave ranging, comprising the following steps:

[0037] S1: Heterogeneous data fusion processing, including hardware isolation and independent acquisition, clock synchronization mechanism, data caching and alignment, data format standardization, algorithm optimization and fusion, and data verification and correction.

[0038] Preferably, hardware isolation and independent acquisition include: for signals with different sampling rates, the frequency bands are divided by hardware isolation, and then independent acquisition circuits are used for data acquisition, which can avoid interference between signals with different sampling rates and ensure the accuracy of respective data acquisition; since the sampling frequency required for the industrial frequency electrical quantity data collected by the intelligent recorder is relatively low (≧5kHz), and the sampling frequency required by the traveling wave ranging device is relatively high (≧1MHz), the two types of sampled data are in different sampling intervals. In order to minimize the interference of the two types of data to each other, the data synchronization acquisition system uses hardware isolation to divide the two data frequency bands, and then collects and stores data for each frequency band. The principle of the acquisition system is as follows Figure 1 shown.

[0039] Furthermore, the transmission unit adopts an integrated design, which can effectively process the sampling signal and perform frequency division transmission.

[0040] Furthermore, oversampling technology is used for analog data acquisition, where oversampling is to sample the input signal at a sampling rate much greater than the Nyquist sampling frequency. The output signal-to-noise ratio SNR = (signal power) / (noise power) is often used to judge system performance. When the noise is a random signal, its power cannot be accurately represented. The statistical variance can be used to define the SNR (signal variance is equivalent to signal power). The specific formula is as follows:

[0041] ,

[0042] Among them, SNR is signal-to-noise ratio; is the variance of the signal; is the variance of the noise.

[0043] Furthermore, sampling noise, i.e. AD quantization noise, is the quantization error (a rounding noise) caused by the limited word length of AD. The quantization error will not be greater than the least significant bit. The quantization error is random and its impact can be estimated by statistical methods. The specific formula is as follows:

[0044] ,

[0045] in, is the total quantized noise power, i.e., variance.

[0046] Assuming that the quantization noise is random and its spectrum is flat in the frequency domain (this assumption is valid when the input analog signal covers most of the analog input voltage range of the AD and the periodicity is not strong), the quantization noise power spectral density (PSD) is the frequency domain characteristic of the quantization noise in units of noise power / Hz, so the quantization noise can be expressed as quantization noise power / unit bandwidth. The assumption of a flat noise spectrum causes the overall quantization noise (based on a fixed value of the least significant bit) to be uniformly distributed in the frequency domain range of -fs / 2 to +fs / 2. The power spectral density of the quantization noise is equal to the total quantization noise power divided by fs. The specific formula is as follows:

[0047] ,

[0048] Among them, fs is the frequency domain.

[0049] Preferably, the clock synchronization mechanism includes: using a high-precision clock synchronization system to ensure the time synchronization of each acquisition channel, even if the sampling rates are different, they can be aligned and integrated in subsequent data processing through accurate time marking.

[0050] Preferably, data caching and alignment include: caching data with different sampling rates during the acquisition process, and aligning and integrating the data according to time stamps or other synchronization information in subsequent data processing. For example, low sampling rate data can be matched with high sampling rate data in time through techniques such as interpolation or resampling.

[0051] Preferably, data format standardization includes: using a unified data format to store and transmit data at different sampling rates, ensuring the compatibility and comprehensibility of data between different modules and systems, which can facilitate subsequent data processing and analysis.

[0052] Preferably, algorithm optimization and fusion include: in the data processing algorithm, fully considering the characteristics of data with different sampling rates, performing optimization and fusion; in the fault analysis and ranging algorithms, rationally utilizing the information provided by data with different sampling rates to improve the accuracy of analysis and ranging.

[0053] Furthermore, data verification and correction include: verifying and correcting the collected data to ensure the accuracy and reliability of the data. If anomalies or inconsistencies are found in the data, they can be processed through data cleaning, repair or re-collection.

[0054] It should be noted that the intelligent recorder collects and stores the industrial frequency electrical quantity data corresponding to the analog quantity, while the traveling wave ranging device collects and stores the high-frequency traveling wave pulse data. The two are in different sampling frequency bands. In this scheme, the idea of ​​synchronous collection, separate storage, separate processing and coordinated fault analysis of industrial frequency and high-frequency data is adopted. That is, the industrial frequency and high-frequency traveling wave data are synchronously sampled under the control of satellite synchronization pulses, and the collected data (including absolute time) are stored in different storage intervals. After a fault occurs, their respective storage buffers form their respective corresponding fault recording files, and their respective algorithms are used to perform ranging analysis on their respective data. Finally, a fault report is given based on the coordinated analysis of the two recording data.

[0055] Specifically, a high-precision clock synchronization system is used to ensure the time synchronization of each acquisition channel. Even if the sampling rates are different, they can be aligned and integrated in subsequent data processing through accurate time stamps. The performance of the synchronization system is ensured by the following measures: clock chips with high stability and low drift characteristics are selected. These chips use advanced crystal oscillator technology to provide a more accurate clock signal reference; the Beidou antenna design is optimized to improve the gain and directivity of the antenna. High-gain antennas can enhance the strength of receiving Beidou satellite signals and reduce the possibility of signal loss and interference; low-loss, well-shielded signal transmission lines are used to reduce signal attenuation and interference during transmission.

[0056] It adopts advanced satellite signal capture and tracking algorithms to improve the processing capabilities of Beidou satellite signals. It uses multi-correlator technology and adaptive filtering algorithms to lock satellite signals more quickly and accurately, reducing signal capture time and errors.

[0057] The carrier phase and pseudorange measurements of satellite signals are accurately processed, and the influence of factors such as the ionosphere and troposphere on signal propagation is corrected through algorithms. The use of dual-frequency or multi-frequency measurement technology combined with the ionospheric model correction algorithm can significantly improve the accuracy of positioning and clock synchronization.

[0058] High-precision clock synchronization algorithms are used, such as the two-way time comparison algorithm (TWSTFT) or the common view time comparison algorithm (CVT). These algorithms can achieve higher-precision clock synchronization by performing precise time comparison and error correction between two or more clocks. Combined with data fusion algorithms such as Kalman filtering, the information of multiple clock sources is comprehensively processed under dual Beidou conditions to improve the stability and reliability of clock accuracy. The Kalman filtering algorithm is used to fuse the measurement data of the dual Beidou clock and the local clock, and the clock deviation is adjusted in real time to make the system clock more accurate.

[0059] During the system integration process, ensure good matching and collaboration between various components, rationally layout the clock chip, antenna and signal processing module, and reduce electromagnetic interference and signal crosstalk; at the same time, conduct strict electromagnetic compatibility (EMC) testing on the entire system to ensure that the system can operate stably in complex electromagnetic environments.

[0060] Establish a regular clock calibration mechanism and use the high-precision time signal of Beidou satellite to calibrate the system clock; during system operation, monitor the clock deviation in real time and make timely adjustments based on the deviation; use an automatic calibration algorithm to automatically trigger the calibration procedure when the clock deviation exceeds a certain threshold, ensuring that the system clock always maintains a high level of accuracy.

[0061] S2: Large-capacity, multi-backup hybrid storage, including the combination of multiple storage media, data redundancy backup and improved data reliability.

[0062] Preferably, Figure 2 The figure shows a flow chart of the storage system, which includes a combination of multiple storage media: the device adopts a combination of front high-speed storage and rear large-capacity storage to achieve safe and efficient storage; the front high-speed storage is implemented by NAND, which has a high read and write speed and is suitable for storing frequently read and written transient data; the rear large-capacity storage is implemented by a high-performance hard disk, which has a large storage capacity and is suitable for storing long-term recording files; this large-capacity storage design can ensure that the device can store enough fault recording data, including electrical quantity data before, during and after the fault, as well as traveling wave data.

[0063] Furthermore, the front high-speed storage is implemented through NAND flash memory, which has a fast read and write speed and can meet the needs of frequent reading and writing of transient data; the rear large-capacity storage is implemented by a high-performance hard disk, which can meet the needs of long-term file storage; the circular storage and sequential storage methods are adopted, and the circular storage can ensure that the latest transient data is always available when the NAND capacity is limited; the electrical quantity data and traveling wave data before, during and after the fault are integrated and classified, divided according to different fault events or time periods, and stored in a high-performance hard disk.

[0064] Furthermore, the device uses storage media security detection technology to ensure the security of storage; for NAND flash memory, the built-in health monitoring circuit and algorithm monitor the wear degree, number of bad blocks, read and write performance and other indicators of NAND in real time; when abnormal conditions are found in NAND, such as excessive wear or increase in bad blocks, an alarm is issued in time and corresponding measures are taken to switch to a spare NAND module or start a data recovery program; for high-performance hard drives, the hard drive's own self-monitoring, analysis and reporting technology (SMART) is used to monitor various health indicators of the hard drive in real time.

[0065] Preferably, data redundancy backup includes: in order to fully ensure the security of the recorded data, the system will perform multiple backup storage of important data, which means that the same data will be stored in multiple storage media at the same time to prevent data loss due to failure of a single storage medium.

[0066] Preferably, improving data reliability includes: multiple backup storage can effectively improve data reliability, even if a storage medium has a problem, data can still be restored from other backups, ensuring smooth fault analysis and diagnosis.

[0067] Specifically, taking 2MHz high-frequency sampling frequency as an example, when the number of analog channels collected is 60, and the high-frequency traveling wave recording length is 80ms, the recording data length corresponding to a high-frequency recording file is not less than 18.31Mbyte; in this case, large-capacity, multi-backup hybrid storage technology can ensure that the device can stably store these data, and quickly and accurately read and analyze these data when needed.

[0068] Preferably, the large-capacity, multi-backup hybrid storage technology of the intelligent wave recording and traveling wave ranging device provides solid data support for fault monitoring and analysis of the power system, which helps to improve the stability and reliability of the power system.

[0069] S3: Startup based on multi-information collection, including analog quantity startup, switch quantity startup, GOOSE message startup and station control layer message startup.

[0070] Preferably, the analog quantity startup includes: the acquisition unit monitors the analog quantity in the substation in real time, including voltage, current, etc.; when the analog quantity exceeds the set threshold, such as voltage mutation, current increase, etc., the device will start the wave recording or traveling wave ranging function.

[0071] Preferably, the switch quantity startup includes: monitoring the state changes of switch quantities such as circuit breakers and knife switches; when the switch quantity undergoes a sudden change, such as circuit breaker tripping, knife switch switching, etc., the device will start the corresponding function.

[0072] Preferably, the GOOSE message startup includes: receiving and parsing the GOOSE message, and making a judgment based on the switch state information and action information in the message; when the data set in the GOOSE message changes and the startup condition is met, the device starts.

[0073] Preferably, the station control layer message startup includes: real-time analysis of the station control layer message, and when an abnormality occurs in the station control layer message, the device is started.

[0074] Furthermore, the startup based on multi-information collection also includes: when a certain type of startup method is triggered among analog startup, switch startup, GOOSE message startup and station control layer message startup, the status of the other three types of startup methods is judged. If the other three types of startup methods are not triggered within T1 time after the triggering of this type of startup method, it is determined that the startup credibility is low, the device will not start, and a first-level alarm signal is sent to the operation and maintenance personnel to prompt the operation and maintenance personnel to repair the device.

[0075] If within T1 time after this type of start-up method is triggered, only one or two of the other three types of start-up methods are triggered, the startup credibility is judged to be medium, and a secondary alarm signal is sent to the operation and maintenance personnel, prompting them to track the status and judge the status of the other three types of start-up methods within T2 time after this type of start-up method is triggered. If within T2 time after this type of start-up method is triggered, only one or two of the other three types of start-up methods are still triggered, a primary alarm signal is sent to the operation and maintenance personnel, prompting them to perform device maintenance.

[0076] If the other three types of startup methods are triggered within T2 time after this type of startup method is triggered, the device will start and send a secondary alarm signal to the operation and maintenance personnel, prompting the operation and maintenance personnel to track the status, where T2 time is greater than T1 time.

[0077] If the other three types of startup methods have been triggered within T1 time after this type of startup method is triggered, the startup credibility is determined to be high, the device is started, and the startup information is recorded, without sending an alarm signal to the operation and maintenance personnel.

[0078] It should be noted that the device usually adopts a comprehensive judgment of multiple starting methods to improve the accuracy and reliability of the startup; for example, combining the changes in analog quantity and switch quantity, or considering the information of GOOSE message and station control layer message at the same time to determine whether to start the recording or traveling wave ranging function; using intelligent algorithms to analyze the collected information, identify abnormal or fault modes, and automatically start the corresponding function; these starting technologies can capture various abnormal conditions in the substation in a timely and accurate manner, providing important data support for fault diagnosis and analysis.

[0079] S4: Comprehensive distance measurement algorithm, including the establishment of electromagnetic-circuit framework model, construction of comprehensive distance measurement model, optimization algorithm to solve objective function, correction of preliminary fault point coordinate estimate, implementation of power fault precise location system and support of computer equipment and storage media.

[0080] Preferably, Figure 3 The figure shows the management unit ranging analysis flow chart. The establishment of the electromagnetic-circuit framework model includes: based on field theory and electromagnetic theory, an electromagnetic-circuit framework model is constructed to describe the propagation law of electromagnetic waves in transmission lines and their coupling with circuit elements; the model uses Maxwell's equations to describe the propagation law of electromagnetic waves, and couples them through the boundary conditions of electromagnetic fields and circuit elements.

[0081] Preferably, the construction of the comprehensive ranging model includes: based on the electromagnetic-circuit framework model, a comprehensive ranging model combining traveling wave ranging and recording wave ranging is constructed; this model comprehensively considers line parameters, topological structure, distribution parameters and fractionation branch factors, and constructs an objective function based on these factors.

[0082] Preferably, solving the objective function using the optimization algorithm includes: solving the objective function of the comprehensive ranging model using the optimization algorithm to obtain a preliminary fault point coordinate estimate; using a particle swarm optimization algorithm to iteratively solve the objective function, and when the objective function reaches a minimum value, obtaining a preliminary fault point coordinate estimate.

[0083] Preferably, the correction of the preliminary fault point coordinate estimate includes: correcting the preliminary fault point coordinate estimate using a weighted average correction method to obtain a final fault point coordinate value; this process includes aggregating all preliminary fault point coordinate estimates, assigning an accuracy score to each preliminary fault point coordinate estimate, and then calculating the corrected preliminary fault point coordinates.

[0084] Preferably, the implementation of the power fault precise positioning system includes: the system includes a first model building module, a second model building module, an optimization algorithm solving module, a correction and verification module, and a data processing and analysis module, and these modules work together to achieve precise positioning of faults in the power system.

[0085] Preferably, the support of computer equipment and storage media includes: the technology can be implemented by computer equipment and computer-readable storage media, wherein a computer program executes the steps of the above-mentioned method for accurately locating power faults based on a comprehensive ranging algorithm.

[0086] Furthermore, the industrial frequency electrical quantity recording data is used for impedance method ranging analysis to give the impedance method ranging result, and the high-frequency traveling wave recording data is used for traveling wave method ranging analysis to give the traveling wave method ranging result; since the sampling frequency of high-frequency traveling waves is high, while the sampling frequency of industrial frequency recording data is relatively low and the recording time requirement is relatively long, the fault start and end times corresponding to the two types of recording data are different. Therefore, when measuring distance, the fault time determined by the impedance method is sent to the traveling wave method for ranging. The traveling wave method uses the fault time provided by the impedance method as a reference to search and identify the traveling wave head and the reflected wave head of the high-frequency traveling wave recording data, and finally a comprehensive analysis is performed based on the impedance ranging results and the traveling wave ranging results to give the final ranging result.

[0087] Furthermore, equipment is installed on both sides of the fault line to monitor the initial traveling waves reaching the two monitoring points, so as to perform double-end traveling wave ranging, such as Figure 4 The figure shows the traveling wave ranging positioning model view. Points M and N are equipped with monitoring points of the equipment respectively, and the fault occurs at point C between points M and N.

[0088] like Figure 5 The figure shows the integrated distance measurement process. The initial traveling wave generated by the fault point C has a speed of The power is transmitted along the transmission line to both ends, and the time when it arrives at both ends is recorded as , , then the distance from the fault point to the monitoring points at both ends is as follows:

[0089] ,

[0090] ,

[0091] in, is the distance between the fault point and point M; is the distance between the fault point and point N.

[0092] It should be noted that the impedance distance measurement method works based on the principle of industrial frequency electrical quantities. It obtains current and voltage data during the fault process, uses calculations to obtain the impedance value in the fault circuit, constructs a voltage balance equation, and uses numerical analysis to calculate the location of the fault and the reactance of the measurement point, ultimately obtaining the accurate fault distance.

[0093] Specifically, according to the traveling wave ranging theory, the traveling wave ranging method is based on the traveling wave head moment and the traveling wave velocity. The single-ended traveling wave ranging equation is as follows:

[0094] ,

[0095] in, is the distance measurement result; v is the speed of the traveling wave; and is the arrival time of the first traveling wave head and the reflected traveling wave of the traveling wave at the fault point.

[0096] The double-terminal traveling wave ranging equation is as follows:

[0097] ,

[0098] Where, L is the line length; is the arrival time of the first traveling wave at this end; is the arrival time of the first traveling wave at the other end; It is the distance between the fault point and the local end, that is, the distance measurement result.

[0099] Furthermore, the reliability correction of the comprehensive ranging algorithm is carried out. The comprehensive ranging analysis compares the ranging results of the impedance method and the traveling wave method. To further improve the reliability of the ranging algorithm, the following operations are performed: Reliability analysis is carried out by comparing the deviation of the ranging results of the impedance method and the traveling wave method to judge the reliability of the ranging results: if the deviation of the two is within the deviation threshold range, it is indicated as a reliable result; if the deviation of the two exceeds the deviation threshold range, it is indicated as an unreliable result.

[0100] Ranging accuracy correction, select the appropriate ranging result based on the reliability of the ranging result calculated in the previous step: if it is a reliable result, the traveling wave ranging result shall be used as the standard to improve the accuracy of the comprehensive ranging algorithm; if it is an unreliable result, the impedance ranging result shall be used as the standard to eliminate the influence of clutter on the traveling wave ranging algorithm and improve the reliability of the comprehensive ranging algorithm.

[0101] It should be noted that, after experimental verification, the comprehensive ranging algorithm has the following advantages: improving the ranging accuracy of the intelligent recorder, and in terms of device operation, overcoming the situation that the impedance ranging method of the intelligent recorder is easily affected by factors such as transition resistance and the other end inrush current, and the ranging accuracy cannot meet the requirements of the power system.

[0102] It overcomes the shortcomings of traveling wave ranging devices that are easily started by mistake and cannot record power frequency data.

[0103] In summary, the present invention improves the integration level of the device. The intelligent recorder has the functions of recording, network distribution, secondary system visualization and intelligent operation and maintenance. On this basis, the intelligent recording and traveling wave ranging device further integrates the traveling wave function, which is in line with the development trend of intelligent recorders, is conducive to the comprehensive collection of information within the station, and can further improve the integration level of the device; through the innovative use of a comprehensive ranging algorithm, according to the first influencing factors such as line parameters, topological structure, distribution parameters and fractionation branches, based on the electromagnetic-circuit framework model, a comprehensive ranging model combining traveling wave ranging and recording ranging is constructed, the objective function is solved by the optimization algorithm, the preliminary fault point coordinate estimate is obtained, and the fault point is accurately simulated. The invention improves the ranging accuracy. Since the impedance ranging method is easily affected by the factors of transition resistance and the inrush current at the opposite end, there is a problem of insufficient ranging accuracy. According to the first influencing factors such as line parameters, topological structure, distribution parameters and fractionation branches, a comprehensive ranging model combining traveling wave ranging and recording wave ranging is constructed based on the electromagnetic-circuit framework model. The objective function is solved by the optimization algorithm to obtain the preliminary fault point coordinate estimation value. The invention realizes the high accuracy and high efficiency of power system fault location by combining the method of precise simulation, intelligent analysis and effective correction. The invention overcomes the In order to overcome the shortcomings of false start-up of the device and single recorded data, the intelligent wave recording and traveling wave ranging device has taken a variety of measures, adopting the intelligent station linkage technology to effectively avoid the false start of the whole station, and improve the problem that the existing device is easily disturbed by clutter and false start. When a fault occurs, it can quickly and accurately locate the fault point, thereby avoiding unnecessary equipment startup and reducing the possibility of false start; the present invention adopts the synchronous acquisition technology of industrial frequency wave recording data and high-frequency traveling wave data to achieve efficient processing and analysis of different types of data, solve the problem of single recorded data, and this synchronous acquisition is crucial for quickly and accurately diagnosing power system faults. The wavelet algorithm is upgraded to optimize and improve the parameters in the calculation steps, making the calculation more efficient, which helps to improve the data processing speed and meet the requirements for high-speed data processing in traveling wave ranging. The key process is implemented using FPGA, which improves the data calculation efficiency, reduces costs, and improves the flexibility and scalability of the system. The present invention reduces equipment costs and operation and maintenance difficulties, improves the reliability of the power system, and the device has high integration, greatly reduces station-level investment, and can reduce operation and maintenance costs, simplify equipment maintenance and management processes. The intelligent wave recording and traveling wave ranging device can achieve more comprehensive and accurate fault analysis and positioning, timely discover and eliminate faults, and improve the reliability and stability of the power system.

[0104] Embodiment 2 is an embodiment of the present invention, which provides an integrated design system of intelligent wave recording and traveling wave ranging, including: a collection unit and a management unit.

[0105] The acquisition unit includes a power module, an integrated transmission module, an analog acquisition module, a traveling wave acquisition module, an optical port module, a data acquisition module, a data processing module and a background analysis module.

[0106] The management unit includes a host module and a display module.

[0107] The acquisition unit transmits the electrical quantity signal to the traveling wave acquisition board and the analog quantity acquisition board for processing through the integrated transmission module, realizes the synchronous sampling of the power frequency and traveling wave data, realizes the reception and analysis of the intelligent station message through the optical port board, and collects the switch quantity data through the switch quantity acquisition board. The system also has a satellite time synchronization function to realize the accurate processing of the sampling time stamp.

[0108] The front panel of the acquisition unit product includes indicator lights, buttons and USB interface, and the rear panel interface can access analog quantity, switch quantity, traveling wave electrical quantity and intelligent station network message data.

[0109] like Figure 6 The figure shows a schematic diagram of the intra-station communication mode of the intelligent wave recording and traveling wave ranging device. The acquisition unit collects analog quantities, traveling wave data, switch quantities and communication messages, and has the functions of wave recording file generation, traveling wave file generation, comprehensive ranging, network message analysis and communication.

[0110] The management unit obtains data such as telesignaling, telemetering, wave recording files, traveling wave files, archive files, and constant value files from the protection device and acquisition unit through MMS and GOOSE. The data is uniformly processed and stored in the data center, reducing the complexity of the data flow within the station. Each business module obtains data through the data center, performs logical operations of its own business module, and completes visual display and intelligent operation and maintenance.

[0111] The management unit realizes recording file analysis, traveling wave file analysis, network message analysis and result display, secondary system visualization and intelligent operation and maintenance functions.

[0112] Embodiment 3 is an embodiment of the present invention, which is different from the previous embodiment in that:

[0113] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0114] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0115] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0116] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0117] Example 4 is an embodiment of the present invention, which provides an integrated design method of intelligent wave recording and traveling wave ranging. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through simulation experiments.

[0118] This example takes a 220kV smart station as an example. The typical physical deployment of the smart wave recording and traveling wave ranging device is as follows: Figure 7 As shown in the figure, the station is equipped with a management unit and multiple acquisition units. The acquisition unit realizes data acquisition of 220kV lines, main transformers and 110kV lines. The system block diagram of the acquisition unit is as follows Figure 8 shown.

[0119] The management unit realizes recording file analysis, traveling wave file analysis, network message analysis and result display, secondary system visualization, and intelligent operation and maintenance functions. The management unit can effectively interact with other equipment in the substation and work together to provide support for the safe and stable operation of the power system. The specific communication mode and protocol selection can be adjusted and configured according to the actual application scenario and equipment requirements.

[0120] The management unit supports access to all secondary equipment such as acquisition units and protection devices in the substation, realizes online monitoring of secondary virtual circuits, online monitoring of process layer optical fiber circuits, secondary circuit fault diagnosis and positioning, secondary equipment status monitoring, monitoring and early warning, configuration file management and control, intelligent inspection of protection equipment, intelligent scheduled inspection of protection equipment, secondary maintenance auxiliary measures, information management and comprehensive analysis, and has the ability to communicate with the master station system.

[0121] like Fig. 9 and Fig.10 The figure shows the schematic view of the front and rear panels of the acquisition unit. The management unit and the acquisition unit communicate using the MMS protocol or a private protocol. When a power grid fault occurs, the acquisition unit notifies the management unit through the recording completion signal and uploads a fault report. After receiving the signal, the management unit actively obtains the power frequency recording and high-frequency traveling wave recording from the acquisition unit and uses the ranging algorithm used in this project to perform ranging analysis. The management unit supports the display of the waveforms of the two recordings and the comprehensive ranging analysis results.

[0122] like Fig.11 and Fig.12 The figure shows the schematic view of the management unit system and the management unit view. According to the acquisition unit modeling specification, the management unit obtains the corresponding recording file from the acquisition unit through the RcdMade signal under different logical devices and analyzes it. For the management unit, since the power frequency recording and high-frequency traveling wave recording are triggered by different RcdMade signals, it is impossible to match the recording files directly according to the acquisition. Therefore, it is necessary to pair the power frequency recording and high-frequency traveling wave recording of the same fault according to the fault time to facilitate subsequent analysis and display. At the same time, the management unit also supports directly obtaining the ranging results analyzed by the acquisition unit through fault briefings.

[0123] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A design method for integrating intelligent wave recording and traveling wave ranging, characterized in that: include: Heterogeneous data fusion processing, including hardware isolation and independent collection, clock synchronization mechanism, data caching and alignment, data format standardization, algorithm optimization and fusion, and data verification and correction; Large-capacity, multi-backup hybrid storage, including the combination of multiple storage media, data redundancy backup and improved data reliability; Startup based on multi-information collection, including analog quantity startup, switch quantity startup, GOOSE message startup and station control layer message startup; Comprehensive distance measurement algorithm, including the establishment of electromagnetic-circuit framework model, construction of comprehensive distance measurement model, optimization algorithm to solve objective function, correction of preliminary fault point coordinate estimate, implementation of power fault precise location system and support of computer equipment and storage media; The specific steps of the startup based on multivariate information collection are as follows: The acquisition unit monitors the analog quantities in the substation in real time, including voltage and current. When the analog quantity exceeds the set threshold, the device will start the wave recording or traveling wave ranging function; Monitor the state changes of the switch quantity of the circuit breaker or knife switch. When the switch quantity changes suddenly, the device will start the corresponding function; Receive and parse the GOOSE message, make judgments based on the switch status information and action information in the message, and start the device when the data set in the GOOSE message changes and the start conditions are met; Real-time analysis of station control layer messages. When abnormalities occur in station control layer messages, the device starts. The initiation based on multivariate information collection also includes: When a certain type of startup mode is triggered among analog startup, switch startup, GOOSE message startup and station control layer message startup, the status of the other three types of startup modes is judged. If the other three types of startup modes are not triggered within T1 time after the triggering of this type of startup mode, it is judged that the startup credibility is low, the device will not start, and a first-level alarm signal will be sent to the operation and maintenance personnel to prompt them to perform device maintenance; If within T1 time after the triggering of this type of start-up method, only one or two of the other three types of start-up methods are triggered, the startup credibility is determined to be medium, and a second-level alarm signal is sent to the operation and maintenance personnel to prompt them to track the status and judge the status of the other three types of start-up methods within T2 time after the triggering of this type of start-up method. If within T2 time after the triggering of this type of start-up method, only one or two of the other three types of start-up methods are still triggered, a first-level alarm signal is sent to the operation and maintenance personnel to prompt them to perform device maintenance; If the other three types of start-up methods are triggered within T2 time after this type of start-up method is triggered, the device will start and send a secondary alarm signal to the operation and maintenance personnel to prompt the operation and maintenance personnel to track the status; If the other three types of startup methods have been triggered within T1 time after this type of startup method is triggered, the startup credibility is determined to be high, the device is started, and the startup information is recorded; The specific steps of the comprehensive ranging algorithm are as follows: Based on field theory and electromagnetic theory, an electromagnetic-circuit framework model is constructed to describe the propagation law of electromagnetic waves in transmission lines and their coupling phenomenon with circuit elements. The electromagnetic-circuit framework model uses Maxwell's equations to describe the propagation law of electromagnetic waves and couples them through the boundary conditions of electromagnetic fields and circuit elements. Based on the electromagnetic-circuit framework model, a comprehensive ranging model combining traveling wave ranging and recording wave ranging is constructed, wherein the comprehensive ranging model comprehensively considers line parameters, topological structure, distribution parameters and fractionation branch factors and constructs an objective function; The objective function of the comprehensive distance measurement model is solved by the optimization algorithm to obtain the preliminary fault point coordinate estimate. The objective function is iteratively solved by the particle swarm optimization algorithm. When the objective function reaches the minimum value, the preliminary fault point coordinate estimate is obtained. Correcting the preliminary fault point coordinate estimation value by using a weighted average correction method to obtain a final fault point coordinate value, the process comprising aggregating all preliminary fault point coordinate estimation values, assigning an accuracy score to each preliminary fault point coordinate estimation value, and then calculating a corrected preliminary fault point coordinate; The power fault precise positioning system includes a first model building module, a second model building module, an optimization algorithm solving module, a correction and verification module, and a data processing and analysis module; The support of computer devices and storage media includes being implemented by computer devices and computer-readable storage media, wherein a computer program executes the steps of the power fault precise location system.

2. The integrated design method of intelligent wave recording and traveling wave ranging according to claim 1, characterized in that: The specific steps of the heterogeneous data fusion processing are as follows: For signals with different sampling rates, the frequency bands are divided by hardware isolation, and then independent acquisition circuits are used for data acquisition. Adopt high-precision clock synchronization system; During the acquisition process, data with different sampling rates are cached, and in subsequent data processing, the data are aligned and integrated according to time stamps or other synchronization information; Use a unified data format to store and transmit data at different sampling rates; In the data processing algorithm, the characteristics of data with different sampling rates are considered, and optimization and fusion are performed. In the fault analysis and ranging algorithms, the information provided by data with different sampling rates is used; The collected data is verified and corrected. If any anomalies or inconsistencies are found in the data, they are processed through data cleaning, repair or re-collection.

3. The integrated design method of intelligent wave recording and traveling wave ranging according to claim 2, characterized in that: The specific steps of large-capacity, multi-backup hybrid storage are as follows: The combination of multiple storage media includes the use of front high-speed storage and rear large-capacity storage to achieve safe and efficient storage. The front high-speed storage is implemented by NAND; the rear large-capacity storage is implemented by high-performance hard disk; Data redundancy backup includes the system performing multiple backup storage of data, that is, the same data will be stored in multiple storage media at the same time; Improving data reliability includes utilizing multiple backup storages to process data.

4. An intelligent wave recording and traveling wave ranging integrated design system, based on the intelligent wave recording and traveling wave ranging integrated design method according to any one of claims 1 to 3, characterized in that: include, Collection unit and management unit; The acquisition unit includes a power module, an integrated transmission module, an analog acquisition module, a traveling wave acquisition module, an optical port module, a data acquisition module, a data processing module and a background analysis module; The management unit includes a host module and a display module.

5. The integrated design system of intelligent wave recording and traveling wave ranging as claimed in claim 4, characterized in that: The acquisition unit transmits the electrical quantity signal to the traveling wave acquisition board and the analog quantity acquisition board for processing through the integrated transmission module, realizes the synchronous sampling of the power frequency and traveling wave data, realizes the intelligent station message reception and analysis through the optical port board, and collects the switch quantity data through the switch quantity acquisition board. The system also has the satellite time synchronization function; The front panel of the acquisition unit includes indicator lights, buttons and USB interfaces, and the rear panel interface is used to access analog quantities, switch quantities, traveling wave electrical quantities and intelligent station network message data; The acquisition unit is used to collect analog quantities, traveling wave data, switch quantities and communication messages, and has the functions of wave recording file generation, traveling wave file generation, comprehensive distance measurement, network message analysis and communication.

6. The intelligent wave recording and traveling wave ranging integrated design system as claimed in claim 5, characterized in that: The management unit obtains remote signaling, telemetry, wave recording files, traveling wave files, archive files and fixed value file data from the protection device and the acquisition unit through MMS and GOOSE, and processes and stores them uniformly through the data center. Each business module obtains data through the data center and performs logical operations of its own business module; The management unit is used to realize recording file analysis, traveling wave file analysis, network message analysis and result display, secondary system visualization and intelligent operation and maintenance functions.

7. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the integrated design method of intelligent wave recording and traveling wave ranging described in any one of claims 1 to 3 are implemented.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the integrated design method of intelligent wave recording and traveling wave ranging described in any one of claims 1 to 3 are implemented.

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