CN115684830A - Fault location method and system based on COMTRADE - Google Patents
Fault location method and system based on COMTRADE Download PDFInfo
- Publication number
- CN115684830A CN115684830A CN202211253823.6A CN202211253823A CN115684830A CN 115684830 A CN115684830 A CN 115684830A CN 202211253823 A CN202211253823 A CN 202211253823A CN 115684830 A CN115684830 A CN 115684830A
- Authority
- CN
- China
- Prior art keywords
- ranging
- fault
- traveling wave
- wave
- algorithm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
Landscapes
- Locating Faults (AREA)
Abstract
The invention discloses a fault location method and a system based on COMTRADE, comprising the following steps: calling COMTRADE recording files recorded by ranging terminals at two sides of a line and preprocessing the COMTRADE recording files to obtain a recording file list in a current time window period; analyzing the wave recording file, and selecting a single-ended and double-ended power frequency ranging algorithm or a single-ended and double-ended traveling wave ranging algorithm according to the type of the wave recording file to perform waveform analysis to obtain a preliminary ranging result; and carrying out comprehensive ranging analysis on the ranging result, inducing and displaying and manually analyzing and correcting. The method can quickly and effectively acquire the recording file, combines the single-end and double-end power frequency distance measurement algorithm with the single-end and double-end traveling wave analysis method, synthesizes all single distance measurement analysis results, gives more accurate distance measurement results through automatic algorithm analysis and manual auxiliary correction, is suitable for being used by the power transmission line under different technical conditions, and has the characteristics of quickness of an impedance method, accuracy of traveling wave analysis and the like.
Description
Technical Field
The invention belongs to the technical field of fault location of power transmission lines, and relates to a fault location method and a fault location system based on COMTRADE.
Background
The power transmission line fault location method is characterized in that fault data are analyzed when a line breaks down to obtain the distance from a fault occurrence point to a protection installation position, so that the fault occurrence point can be found in time, the purposes of repairing the fault line and ensuring the stability of power transmission are achieved, and the method has important significance for stable and economic operation of a power system.
The fault location of the transmission line can be divided into an impedance method and a traveling wave method according to the principle of location, wherein the traveling wave method comprises a single-end traveling wave method and a double-end traveling wave method. The impedance method is widely applied and is influenced by factors such as transition resistance, a system operation mode, line distributed capacitance, sampling transmission error, current transformer saturation and the like, and the distance measurement precision is generally low. In contrast, the traveling wave method is not affected by the above factors, and has a high ranging accuracy, but the traveling wave method is also prone to false activation.
At present, a centralized traveling wave distance measuring device which operates in a transformer substation and applies a traveling wave method has more defects, for example, a double-end traveling wave distance measuring device depends on a reliable communication channel between the transformer substations, traveling wave waveforms cannot be analyzed by combining fault waveforms, the starting sensitivity of traveling waves is insufficient when high-resistance faults exist in a region, traveling wave distance measurement cannot be associated with the faults in the region, and the like.
COMTRADE is a standard developed by IEEE for unifying microcomputer protection and recorder recording data formats. The recording file playback system with the format can record the information of the electric quantity and the state change process before and after the power grid fault occurs, completely reflect the instantaneous change after the fault and the action behavior of relay protection, has the capability of data archiving and data reanalysis, is beneficial to improving the scheduling and running level of a power system, improves the quick response capability of processing the power system accident, and ensures the safe and reliable power supply of the power system.
Disclosure of Invention
The invention provides a fault location method and a system based on COMTRADE, wherein a single-end and double-end power frequency location algorithm and a wavelet transform-based single-end and double-end traveling wave location algorithm are combined on an industrial personal computer or a general PC (personal computer) by reading conventional recorded waves generated by a traveling wave location terminal during fault and a COMTRADE file with a high sampling rate, the analysis results of single-end and double-end location within a time window period are synthesized to give a more accurate location result, and the method and the system have the characteristics of rapidity of power frequency impedance analysis, accuracy of traveling wave analysis and the like.
The invention adopts the following technical scheme:
a COMTRADE based fault ranging method, the method comprising the steps of:
step 1: the method comprises the steps that COMTRADE recording files recorded by ranging terminals on two sides of a calling line are called in a mode of combining real-time event triggering, periodic timing calling and manual triggering, preprocessing is conducted, and a recording file list in the current time window period is obtained;
step 2: analyzing a wave recording file in the current time window period, and selecting a single-ended and double-ended power frequency ranging algorithm or a single-ended and double-ended traveling wave ranging algorithm according to the type of the wave recording file to perform waveform analysis to obtain a primary ranging result;
and 3, step 3: and (3) carrying out comprehensive ranging analysis and inductive display and manual analysis and correction on the ranging result in the step (2).
The invention further comprises the following preferred embodiments:
preferably, in step 1, the wave recording files include power frequency wave recording and high frequency wave recording files on the current side and the opposite side generated by the traveling wave ranging terminal during fault.
Preferably, the pretreatment of step 1 comprises: and filtering the two wave recording file lists in the previous and next time window periods in a mode of solving a difference set of file sets in the wave recording file lists, screening out new wave recording files, inserting the new wave recording files into the wave recording file list in the current time window period, and obtaining the wave recording file list in the current time window period.
Preferably, in step 2, for the local side power frequency wave recording file, if there is an opposite side power frequency wave recording file, analyzing the waveform by using a double-end power frequency ranging algorithm to obtain a double-end ranging result, otherwise, analyzing the waveform by using a single-end power frequency ranging algorithm to obtain a single-end ranging result;
wherein, single-ended power frequency range finding algorithm: extracting 6 analog quantity two-dimensional arrays of three-phase currents A, B and C and voltage from the power frequency recording file at the side, analyzing a matched fixed value file recorded by the distance measuring terminal to give a compensation coefficient and opposite side parameter information, and calculating an actual fault position to obtain a single-end distance measuring result;
double-end power frequency ranging algorithm: aligning 12 paths of analog quantities of three-phase currents A, B and C at two sides and voltage according to failure starting time from the power frequency recording files at the side and the opposite side matched in the same time window, then taking a value of a common area, calculating an actual failure position, and obtaining a double-end distance measurement result;
for the high-frequency wave recording file on the side, if the high-frequency wave recording file on the opposite side exists, analyzing the waveform by adopting a double-end traveling wave distance measurement algorithm to obtain a double-end distance measurement result, otherwise, analyzing the waveform by adopting a single-end traveling wave distance measurement algorithm to obtain a single-end distance measurement result;
the single-ended traveling wave distance measurement algorithm comprises the following steps: extracting 3 paths of analog quantity two-dimensional arrays of three-phase currents A, B and C from a high-frequency wave recording file at the side, finding wave head positions of T1 and T2 through wavelet transformation, and calculating an actual fault position according to a single-ended traveling wave distance measurement formula by combining the line length and the wave speed set by a user to obtain a single-ended distance measurement result;
double-end traveling wave ranging algorithm: from the high-frequency wave recording files on the same side and the opposite side matched in the same time window, aligning 6 paths of analog quantity of three-phase currents A, B and C on the two sides according to fault starting time, then taking the value of a public area, finding the wave head positions of T1 and T2 through wavelet transformation, and calculating the actual fault position according to a double-end traveling wave distance measurement formula by combining the line length and the wave speed set by a user to obtain a double-end distance measurement result;
t1 represents the time when the traveling wave first reaches the self side from the fault point, and T2 represents the time when the traveling wave first reaches the opposite side from the fault point.
Preferably, in step 3, the comprehensive ranging analysis strategy is as follows:
and preferentially adopting a double-end ranging result, preferentially adopting a traveling wave ranging result if the difference between the power frequency ranging algorithm and the traveling wave ranging algorithm is within a set range, otherwise, adopting the power frequency ranging algorithm, and simultaneously, manually correcting the analysis waveform of the traveling wave ranging algorithm and storing the analysis waveform in a database.
Preferably, in step 3, the following information display is performed in sequence by using an alarm window:
recording start events and action event sequences, collecting a list of COMTRADE recording files, and setting file transmission overtime waiting timers for waiting for network overtime of the local side, the opposite side power frequency and high frequency recording records and transmitting the records to a fault location analysis system;
the original waveform before the single-end/double-end power frequency ranging algorithm is analyzed, and the timing of a timer displayed by the waveform is set to be 5 seconds;
waveforms before and after the single-end/double-end traveling wave distance measurement algorithm analysis comprise a COMTRADE original waveform and a derived wavelet transformation virtual channel, and the timing of a timer for waveform display is set to be 5 seconds;
and finally displaying the comprehensive ranging analysis result after displaying the information and the waveform, and closing the warning window after 30 seconds.
Preferably, the manual correction is performed, specifically:
manually correcting and ranging, and automatically searching a wave head through a local maximum and minimum algorithm;
the local maximum and minimum value algorithm comprises the following steps: and performing two-round traversal on the local window array data, wherein the first round of traversal finds the maximum value T1 by a slope monotone increasing method, the second round of traversal brings the index position of the maximum value found in the first round of traversal, and the second large value T2 is found, so that the automatic searching of the wave head positions corresponding to T1 and T2 is realized.
A fault location system based on COMTRADE for realizing the fault location method comprises a basic layer, a data communication layer, a data management layer, an application layer and an extension layer;
the basic layer comprises a traveling wave distance measurement terminal and a relational database based on an embedded software platform and is used for acquiring and storing data;
the data communication layer is used for providing a database operation interface and a communication protocol library, and performing terminal model configuration and time synchronization management;
the data management layer is used for managing traveling wave data, configuration, models, logs and messages, storing the data acquired by the traveling wave distance measuring terminal according to fault time and types, monitoring the on-off state of the terminal, and analyzing the messages and logs between the traveling wave distance measuring terminal and the master station;
the application layer comprises an off-line analysis tool for analyzing the travelling wave files, a fault brief report checking tool for displaying and alarming real-time waveforms of the monitored lines and analyzing and displaying a plurality of fault travelling wave files of the same fault;
and the extension layer is used for report generation and authority management.
Preferably, the data communication layer comprises a database management module, a communication protocol library, a terminal configuration module and a time synchronization module;
the database management module is used for managing the relational database and expanding, adding, deleting, changing, checking and creating tables, clearing the tables, deleting the tables and performing transaction operation on the various databases;
the communication protocol library is used for providing a plurality of communication protocols including an IEC61850 protocol and a 103 protocol in a plug-in library mode and providing a uniform interface for application;
the terminal configuration module is used for terminal ledger management, parameter configuration, fixed value configuration, line parameter configuration and system configuration;
the time synchronization module is used for time synchronization and bidirectional time service between the local master station and the terminal;
preferably, the data management layer comprises a file management module, a terminal communication state monitoring module and a terminal message monitoring and log analysis module;
the file management module is used for acquiring and storing a fault waveform file list and a fault waveform file on the ranging terminal, exporting the file and automatically maintaining a magnetic disk;
the terminal communication state monitoring module is used for monitoring the real-time communication state of the ranging terminal and counting the historical communication state;
and the terminal message monitoring and log analyzing module is used for monitoring and analyzing the communication message, analyzing the log and assisting in positioning.
Compared with the prior art, the fault location analysis method based on the COMTRADE format is carried out by combining the power frequency ranging algorithm ranging technology and the traveling wave ranging method based on wavelet change, the single-end and double-end ranging methods are reasonably selected according to the technical conditions of the power transmission line, the advantages of the power frequency ranging algorithm ranging technology and the high-sampling-rate traveling wave analysis method are fully combined, visual display and manual intervention are carried out on the analysis process, the analysis flexibility is improved, meanwhile, the ideal fault distance is obtained through comprehensive ranging analysis and intelligent judgment of multiple ranging results, the accuracy of traveling wave fault analysis can be comprehensively improved, certain efficiency is considered, and powerful assistance is provided for fault location of the long-distance power transmission line. In addition, the method deeply digs the user habit of the power system, provides a relatively friendly real-time alarm popup window analysis human-computer interface, and has very high practicability and economic popularization value.
Drawings
FIG. 1 is a flow chart of a method for fault location according to the present invention;
FIG. 2 is a schematic diagram of an automatic call flow for recording waves according to the present invention;
FIG. 3 is a schematic diagram of the integrated analysis scheduling process of the present invention;
FIG. 4 is a diagram of the wavelet transformed double-ended ranging waveform analysis software design of the present invention;
fig. 5 is a diagram of the fault location system architecture of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described clearly and completely in the following with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described in this application are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art without inventive step, are within the scope of protection of the present invention.
As shown in fig. 1, embodiment 1 of the present invention provides a fault location method based on COMTRADE, and in a preferred but non-limiting implementation manner of the present invention, three links are involved, namely, automatic calling of a recording file, comprehensive analysis and scheduling, and intelligent determination of a ranging result, which correspond to the following steps 1-3, respectively.
Step 1: calling COMTRADE recording files recorded by ranging terminals on two sides of a line by adopting a mode of combining real-time event triggering, periodic timing calling and manual triggering, and preprocessing to obtain a recording file list in a current time window period;
further preferably, the wave recording files comprise power frequency wave recording and high frequency wave recording files on the side and the opposite side;
the pretreatment comprises the following steps: and filtering the front and the back recording lists in a mode of solving a difference set of the two recording list sets, and screening out a new recording event to be inserted into the current recording list.
Therefore, the automatic calling link of the recording file is specifically summarized as follows:
the basis of fault analysis is that enough wave recording files in the same time period are collected, the local side and the opposite side have power frequency wave recording and high frequency wave recording, and the integrity of the files determines the accuracy of fault analysis. In order to improve the success rate of calling the recording file, a system is designed by using a mode of real-time event triggering, periodic timing calling and manual triggering, so that the recording file cannot be missed, the calling cannot be too frequent, and certain real-time performance can be ensured. Because the complete recording list is called every time, the front and back recording lists are required to be compared, a new recording event is screened out and inserted into the current recording list, and the system adopts a mode of solving a difference set of the two sets for rapid filtering, so that the processing speed of millisecond level can be realized. And after the wave recording event is newly added to the wave recording list, the comprehensive analysis scheduling thread is informed to perform further processing. The specific implementation steps are shown in fig. 2.
Step 2: analyzing a wave recording file in the current time window period, and selecting a single-ended and double-ended power frequency ranging algorithm or a single-ended and double-ended traveling wave ranging algorithm according to the type of the wave recording file to perform waveform analysis to obtain a primary ranging result;
preferably, for the local side power frequency wave recording file, if there is a contralateral side power frequency wave recording file, analyzing the waveform by adopting a double-end power frequency ranging algorithm to obtain a double-end ranging result, otherwise, analyzing the waveform by adopting a single-end power frequency ranging algorithm to obtain a single-end ranging result;
wherein, single-ended power frequency range finding algorithm: extracting 6 analog quantity two-dimensional arrays of three-phase currents A, B and C and voltage from the power frequency recording file at the side, analyzing a matched SET fixed value file recorded by the ranging terminal to give a compensation coefficient and opposite side parameter information, and calculating an actual fault position to obtain a single-ended ranging result;
double-end power frequency ranging algorithm: aligning 12 paths of analog quantities of three-phase currents A, B and C at two sides and voltage according to failure starting time from the matched local side and opposite side power frequency recording files in the same time window, then taking a value of a public area, calculating an actual failure position, and obtaining a double-end power frequency ranging result, wherein the double-end power frequency ranging does not depend on a matched SET fixed value file;
and for the high-frequency wave recording file on the side, if the high-frequency wave recording file on the opposite side exists, analyzing the waveform by adopting a double-end traveling wave distance measurement algorithm to obtain a double-end distance measurement result, otherwise, analyzing the waveform by adopting a single-end traveling wave distance measurement algorithm to obtain a single-end distance measurement result.
The single-ended traveling wave distance measurement algorithm comprises the following steps: extracting 3 paths of analog quantity two-dimensional arrays of three-phase currents A, B and C from a high-frequency wave recording file at the side, finding wave head positions of T1 and T2 through wavelet transformation, and calculating an actual fault position according to a single-ended traveling wave distance measurement formula by combining fixed value information such as line length, wave speed and the like set by a user to obtain a single-ended distance measurement result;
double-end traveling wave ranging algorithm: from the high-frequency recording files on the same side and the opposite side matched in the same time window, aligning 6 paths of analog quantities of three-phase currents A, B and C on the two sides according to the fault starting time, then taking the value of a public area, finding the wave head positions of T1 and T2 through wavelet transformation, calculating the actual fault position according to a double-end traveling wave distance measurement formula by combining fixed value information such as line length, wave speed and the like set by a user, and obtaining a double-end distance measurement result;
where T1 represents the time when the traveling wave first reaches the local side from the fault point, and T2 represents the time when the traveling wave first reaches the opposite side from the fault point.
Therefore, the comprehensive analysis scheduling link is specifically summarized as follows:
the comprehensive fault analysis scheduling is a functional core of the system, is used as a central link, obtains a new recording file list in the current time window period from the recording file automatic calling thread, outputs a preliminary analysis result to the distance measurement result intelligent judgment link, performs final processing on the result by the intelligent judgment link, and provides a manual distance measurement interface for facilitating correction as required by a user.
When a new wave recording event arrives, setting a certain time window period, starting a timer (generally 10 minutes, the time is enough for a distance measuring terminal to acquire opposite-end traveling waves and wave recording and complete the data processing and uploading process under normal network conditions), and waiting for the arrival and the completion of calling of the subsequent wave recording event;
after the time window period is up, performing preliminary analysis (analyzing an HDR file which is a head file of a BIL geographic information file (used for representing surface and terrain elevation data)) on all successfully called recording events in the time window period, displaying fault waveforms, performing double-end matching, and only providing a single-end distance measurement result if the opposite end does not have a recording file; and inputting all results into a distance measurement result intelligent judgment unit, performing final processing on the results, and providing a manual distance measurement interface to facilitate correction of a user as required. The specific implementation steps are shown in fig. 3.
And 3, step 3: and (3) carrying out comprehensive ranging analysis, induction and display and manual analysis and correction on the ranging result in the step (2). Further preferably, the intelligent judgment link of the ranging result is as follows:
and summarizing the distance measurement result and intelligently judging according to the preliminary result given by the comprehensive fault analysis scheduling link and the wave recording file in the whole time window period.
And (3) comprehensive ranging analysis strategy:
preferably, the double-end ranging result is adopted, if the difference between the power frequency ranging algorithm and the traveling wave ranging algorithm is within a set range, the ranging result of the traveling wave ranging algorithm is preferably adopted, otherwise, the ranging result of the power frequency ranging algorithm is adopted, and meanwhile, the waveform of the traveling wave ranging algorithm is analyzed, corrected in a mode of selecting a wave head through manual wavelet analysis and then stored in a database, as shown in fig. 4.
The method for correcting by adopting the manual wavelet analysis to select the wave head specifically comprises the following steps:
due to the diversity and complexity of faults, the automatic traveling wave algorithm may find the wave head wrongly, so that the error of the ranging result is larger. Support manual intervention to correct the range finding, carry out the automatic searching of wave head through local maximum minimum algorithm simultaneously, wherein, local maximum minimum algorithm: and performing two rounds of traversal on the local window array data, finding a maximum value T1 in the first round of traversal by a slope monotone increasing method, and substituting the index position of the maximum value found in the first round of traversal in the second round of traversal to find a second large value T2. The algorithm has the possibility of error finding under the conditions that the number of channels is large and the window start-stop area is not obtained correctly, and needs manual assistance to intervene and correct the wave head.
The double ended waveform times are automatically aligned according to absolute time.
As shown in fig. 4, the present invention uses an alarm window to sequentially display the following information, which are four pages of "start recording", "power frequency ranging", "traveling wave ranging", and "result statistics", respectively:
starting wave recording: recording start events, action event sequences, a list of COMTRADE files and file receiving completion time are collected, a file transmission overtime waiting timer is set to be 10 minutes at fixed time, and the file transmission overtime waiting timer is used for waiting for network overtime of local side power frequency and high frequency recording records and transmitting the records to a fault location analysis system, and the overtime value can be set according to a regional network environment;
power frequency ranging: displaying the waveform analyzed by the single-end/double-end power frequency ranging algorithm, wherein the waveform is a COMTRADE original waveform without any conversion, and the timing of a timer is set to be 5 seconds, namely the time of displaying the waveform by an alarm window is 5s;
traveling wave ranging: the waveform of the single-end/double-end traveling wave distance measurement algorithm analysis shows that the waveform is a COMTRADE original waveform and a derived wavelet transform virtual channel, as shown in FIG. 4, the left side of the lower half area of FIG. 4 shows a traveling wave original waveform of the traveling wave distance measurement side and a derived virtual channel waveform after wavelet transform, and the right side shows an opposite side traveling wave distance measurement original waveform and a derived virtual channel waveform after wavelet transform; the timer is set to 5 seconds;
and (4) counting results: and displaying the single-end and double-end power frequency and traveling wave distance measurement results and the comprehensive fault distance measurement judgment result in a table mode, automatically hiding the results after the results are counted and comprehensively analyzed for 30 seconds, namely finally displaying the comprehensive distance measurement analysis results after the previous information and waveforms are displayed, and closing a warning window after 30 seconds.
As shown in fig. 5, embodiment 2 of the present invention provides a fault location system based on COMTRADE, which is designed in a modularized and hierarchical manner, and a system architecture diagram is as shown in fig. 5, and is divided into a base layer, a data communication layer, a data management layer, an application layer, and an extension layer from bottom to top.
The database and the traveling wave ranging terminal in fig. 5 are external interfaces/components; the report generation tool, the off-line analysis tool and the fault brief report viewing tool are tools which need to be realized in software and are called through an EXE process; the other part is a module which needs to be realized in software, and each module is called by a DLL or is directly integrated in a main module.
The specific functions of the base layer, the data communication layer, the data management layer, the application layer and the extension layer are as follows:
base layer: the working base provided by the external environment, the data acquisition source and the final storage destination of the whole software. The traveling wave ranging system mainly comprises a relational database (MySQL/SQLite) and a traveling wave ranging terminal based on an embedded software platform.
A data communication layer: the module is used for providing database operation interfaces, a communication protocol library, terminal model configuration and time synchronization management, and is the module with the closest contact between the whole set of software and the base layer. The system comprises a database management module, a communication protocol library, a terminal configuration module and a time synchronization module.
Wherein the database management module: the relational database management supports the expansion of various databases and supports the common operations of adding, deleting, modifying, checking, creating a table, clearing the table, deleting the table and performing transactions.
A communication protocol library: a plurality of communication protocols are supported through the plug-in library mode, including and not being limited to IEC61850 protocol, 103 protocol, provide unified interface to the application.
A terminal configuration module: and functions of terminal account management, parameter configuration, fixed value configuration, line parameter configuration, system configuration and the like are realized.
A time synchronization module: and time synchronization and bidirectional time service between the local master station and the terminal are realized.
A data management layer: the method is used for managing traveling wave data, configuration, models, logs and messages, respectively storing the data acquired by the terminal according to fault time, types and the like, monitoring the on-off state of the terminal, and analyzing the messages and logs between the terminal and a master station so as to facilitate engineering debugging. The system comprises a file management module, a terminal communication state monitoring module and a terminal message monitoring and log analysis module.
A file management module: the method and the device realize the acquisition and storage of the fault file list and the fault file on the ranging terminal, and support file export and automatic disk maintenance.
A terminal communication state monitoring module: and the real-time communication state monitoring and historical communication state statistics of the ranging terminal are realized.
The terminal message monitoring and log analysis module comprises: and communication message monitoring and analysis and log analysis are supported, and problems are assisted in positioning.
An application layer: the application part of the software comprises an off-line analysis tool for analyzing the travelling wave file, a real-time waveform display and fault alarm for the monitored line and a fault brief report checking tool.
An offline analysis tool: the method for realizing fault waveform viewing and analysis is one of core modules of the system.
The real-time waveform display and fault alarm module: and displaying the real-time waveform of the monitoring line and pushing real-time fault alarm.
Failure briefing viewing tool: and analyzing and displaying a plurality of fault traveling wave files of the same fault, wherein the traveling wave files are recorded wave files.
Expanding the layer: the extension part of the software comprises a report generation tool and a permission management module.
In specific implementation, the generated report includes statistical indexes such as a line fault distance measurement result distribution graph, a recent one-week/month fault event statistical report, a single-end/double-end distance measurement success rate, an event alarm push rate and the like.
Compared with the prior art, the method has the advantages that fault location analysis based on the COMTRADE format is carried out by combining a mature power frequency ranging algorithm ranging technology and a traveling wave ranging method based on wavelet change, the single-end and double-end ranging methods are reasonably selected according to the technical conditions of the power transmission line, the advantages of the power frequency ranging algorithm ranging technology and the high-sampling-rate traveling wave analysis method are fully combined, visual display and manual intervention reanalysis are carried out aiming at the analysis process, the flexibility is improved, meanwhile, an ideal fault distance is obtained through comprehensive ranging analysis and intelligent judgment of multiple ranging results, the accuracy of traveling wave fault analysis can be comprehensively improved, certain efficiency is considered, and powerful assistance is provided for fault location of the long-distance power transmission line. In addition, the method deeply digs the user habit of the power system, provides a relatively friendly real-time alarm popup window analysis human-computer interface, and has high practicability and economic popularization value.
The present disclosure may be systems, methods, and/or computer program products. The computer program product may include a computer-readable storage medium having computer-readable program instructions embodied thereon for causing a processor to implement various aspects of the present disclosure.
The computer readable storage medium may be a tangible device that can hold and store the instructions for use by the instruction execution device. The computer readable storage medium may be, for example, but not limited to, an electronic memory device, a magnetic memory device, an optical memory device, an electromagnetic memory device, a semiconductor memory device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a Static Random Access Memory (SRAM), a portable compact disc read-only memory (CD-ROM), a Digital Versatile Disc (DVD), a memory stick, a floppy disk, a mechanical coding device, such as a punch card or an in-groove protruding structure with instructions stored thereon, and any suitable combination of the foregoing. Computer-readable storage media as used herein is not to be construed as transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or other transmission medium (e.g., optical pulses through a fiber optic cable), or electrical signals transmitted through electrical wires.
The computer-readable program instructions described herein may be downloaded from a computer-readable storage medium to a respective computing/processing device, or to an external computer or external storage device via a network, such as the internet, a local area network, a wide area network, and/or a wireless network. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers and/or edge servers. The network adapter card or network interface in each computing/processing device receives computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in the respective computing/processing device.
Computer program instructions for carrying out operations of the present disclosure may be assembler instructions, instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The computer-readable program instructions may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider). In some embodiments, aspects of the disclosure are implemented by personalizing an electronic circuit, such as a programmable logic circuit, a Field Programmable Gate Array (FPGA), or a Programmable Logic Array (PLA), with state information of computer-readable program instructions, which can execute the computer-readable program instructions.
Various aspects of the present disclosure are described herein with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-readable program instructions.
These computer-readable program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. These computer readable program instructions may also be stored in a computer readable storage medium that can direct a computer, programmable data processing apparatus, and/or other devices to function in a particular manner, such that the computer readable medium storing the instructions comprises an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks.
The computer readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer, other programmable apparatus or other devices implement the functions/acts specified in the flowchart and/or block diagram block or blocks.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. A fault distance measurement method based on COMTRADE is characterized in that:
the method comprises the following steps:
step 1: calling COMTRADE recording files recorded by ranging terminals on two sides of a line by adopting a mode of combining real-time event triggering, periodic timing calling and manual triggering, and preprocessing to obtain a recording file list in a current time window period;
and 2, step: analyzing a wave recording file in the current time window period, and selecting a single-ended and double-ended power frequency ranging algorithm or a single-ended and double-ended traveling wave ranging algorithm according to the type of the wave recording file to perform waveform analysis to obtain a primary ranging result;
and step 3: and (3) carrying out comprehensive ranging analysis and inductive display and manual analysis and correction on the ranging result in the step (2).
2. A COMTRADE based fault ranging method according to claim 1, characterized in that:
in the step 1, the wave recording files comprise power frequency wave recording and high frequency wave recording files of the side and the opposite side generated by the traveling wave distance measuring terminal in the fault.
3. The COMTRADE based fault location method of claim 1, wherein:
step 1 the pretreatment comprises: and filtering the two recording file lists of the previous and next time window periods in a way of solving a difference set of the file sets in the recording file lists, screening out new recording files, and inserting the new recording files into the recording file list of the current time window period to obtain the recording file list of the current time window period.
4. A COMTRADE based fault ranging method according to claim 1, characterized in that:
step 2, for the power frequency wave recording file at the side, if the power frequency wave recording file at the opposite side exists, analyzing the waveform by adopting a double-end power frequency ranging algorithm to obtain a double-end ranging result, otherwise, analyzing the waveform by adopting a single-end power frequency ranging algorithm to obtain a single-end ranging result;
the single-ended power frequency ranging algorithm comprises the following steps: extracting 6 analog quantity two-dimensional arrays of three-phase currents A, B and C and voltage from the power frequency recording file of the side, analyzing a matched constant value file recorded by the distance measuring terminal to give a compensation coefficient and opposite side parameter information, and calculating an actual fault position to obtain a single-end distance measuring result;
double-end power frequency ranging algorithm: aligning 12 paths of analog quantities of three-phase currents A, B and C at two sides and voltage according to failure starting time from the power frequency recording files at the side and the opposite side matched in the same time window, then taking a value of a common area, calculating an actual failure position, and obtaining a double-end distance measurement result;
for the high-frequency wave recording file on the side, if the high-frequency wave recording file on the opposite side exists, analyzing the waveform by adopting a double-end traveling wave distance measurement algorithm to obtain a double-end distance measurement result, otherwise, analyzing the waveform by adopting a single-end traveling wave distance measurement algorithm to obtain a single-end distance measurement result;
the single-ended traveling wave distance measurement algorithm comprises the following steps: extracting 3 paths of analog quantity two-dimensional arrays of three-phase currents A, B and C from a high-frequency wave recording file at the side, finding wave head positions of T1 and T2 through wavelet transformation, and calculating an actual fault position according to a single-ended traveling wave distance measurement formula by combining the line length and the wave speed set by a user to obtain a single-ended distance measurement result;
double-end traveling wave ranging algorithm: from the high-frequency wave recording files on the same side and the opposite side matched in the same time window, aligning 6 paths of analog quantities of three-phase currents A, B and C on the two sides according to the fault starting time, then taking the value of a common area, finding the wave head positions of T1 and T2 through wavelet transformation, and calculating the actual fault position according to a double-end traveling wave distance measurement formula by combining the line length and the wave speed set by a user to obtain a double-end distance measurement result;
t1 represents the time when the traveling wave first reaches the local side from the fault point, and T2 represents the time when the traveling wave first reaches the opposite side from the fault point.
5. A COMTRADE based fault ranging method according to claim 1, characterized in that:
in step 3, the comprehensive ranging analysis strategy is as follows:
and preferentially adopting a double-end ranging result, preferentially adopting a traveling wave ranging result if the difference between the power frequency ranging algorithm and the traveling wave ranging algorithm is within a set range, otherwise, adopting the power frequency ranging algorithm, and simultaneously, manually correcting the analysis waveform of the traveling wave ranging algorithm and storing the analysis waveform in a database.
6. The COMTRADE based fault location method of claim 1, wherein:
in step 3, the following information display is sequentially carried out by adopting an alarm window:
recording start events and action event sequences, collecting a list of COMTRADE recording files, and setting file transmission overtime waiting timers for waiting for network overtime of the local side, the opposite side power frequency and high frequency recording records and transmitting the records to a fault location analysis system;
the original waveform before the single-end/double-end power frequency ranging algorithm is analyzed, and the timing of a timer displayed by the waveform is set to be 5 seconds;
waveforms before and after single-end/double-end traveling wave distance measurement algorithm analysis comprise COMTRADE original waveforms and derived wavelet transformation virtual channels, and the timing of a timer displayed by the waveforms is set to be 5 seconds;
and finally displaying the comprehensive ranging analysis result after displaying the information and the waveform, and closing the warning window after 30 seconds.
7. The COMTRADE based fault location method of claim 1, wherein:
the manual correction specifically comprises:
manually correcting and ranging, and automatically searching the wave head through a local maximum and minimum algorithm;
the local maximum and minimum value algorithm comprises the following steps: and performing two-round traversal on the local window array data, wherein the first round of traversal finds the maximum value T1 by a slope monotone increasing method, the second round of traversal brings the index position of the maximum value found in the first round of traversal, and the second large value T2 is found, so that the automatic searching of the wave head positions corresponding to T1 and T2 is realized.
8. A COMTRADE-based fault location system for implementing the fault location method of any one of claims 1 to 7, the fault location system comprising a base layer, a data communication layer, a data management layer, an application layer and an extension layer, wherein:
the base layer comprises a traveling wave ranging terminal and a relational database based on an embedded software platform and is used for acquiring and storing data;
the data communication layer is used for providing a database operation interface and a communication protocol library, and performing terminal model configuration and time synchronization management;
the data management layer is used for managing traveling wave data, configuration, models, logs and messages, storing the data acquired by the traveling wave distance measuring terminal according to fault time and types, monitoring the on-off state of the terminal, and analyzing the messages and logs between the traveling wave distance measuring terminal and the master station;
the application layer comprises an offline analysis tool for analyzing the traveling wave files, a fault briefing and checking tool for displaying real-time waveforms of the monitored lines and giving fault alarms and analyzing and displaying a plurality of fault traveling wave files with the same fault;
and the extension layer is used for report generation and authority management.
9. The COMTRADE based fault ranging system of claim 8, wherein:
the data communication layer comprises a database management module, a communication protocol library, a terminal configuration module and a time synchronization module;
the database management module is used for managing the relational database and expanding, adding, deleting, changing, checking and creating tables, clearing the tables, deleting the tables and performing transaction operation on the various databases;
the communication protocol library is used for providing a plurality of communication protocols including an IEC61850 protocol and a 103 protocol in a plug-in library mode and providing a uniform interface for application;
the terminal configuration module is used for terminal ledger management, parameter configuration, fixed value configuration, line parameter configuration and system configuration;
and the time synchronization module is used for time synchronization and bidirectional time service between the local master station and the terminal.
10. The COMTRADE based fault ranging system of claim 8, wherein:
the data management layer comprises a file management module, a terminal communication state monitoring module and a terminal message monitoring and log analysis module;
the file management module is used for acquiring and storing a fault waveform file list and a fault waveform file on the ranging terminal, exporting the file and automatically maintaining a magnetic disk;
the terminal communication state monitoring module is used for monitoring the real-time communication state of the ranging terminal and counting the historical communication state;
and the terminal message monitoring and log analyzing module is used for monitoring and analyzing the communication message and analyzing the log, and assisting in positioning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211253823.6A CN115684830A (en) | 2022-10-13 | 2022-10-13 | Fault location method and system based on COMTRADE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211253823.6A CN115684830A (en) | 2022-10-13 | 2022-10-13 | Fault location method and system based on COMTRADE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115684830A true CN115684830A (en) | 2023-02-03 |
Family
ID=85063762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211253823.6A Pending CN115684830A (en) | 2022-10-13 | 2022-10-13 | Fault location method and system based on COMTRADE |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115684830A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117031382A (en) * | 2023-10-10 | 2023-11-10 | 云南电力试验研究院(集团)有限公司 | Single-ended traveling wave device verification method based on signal-to-noise ratio and sine fitting method |
-
2022
- 2022-10-13 CN CN202211253823.6A patent/CN115684830A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117031382A (en) * | 2023-10-10 | 2023-11-10 | 云南电力试验研究院(集团)有限公司 | Single-ended traveling wave device verification method based on signal-to-noise ratio and sine fitting method |
| CN117031382B (en) * | 2023-10-10 | 2024-02-20 | 云南电力试验研究院(集团)有限公司 | Single-ended traveling wave device verification method based on signal-to-noise ratio and sine fitting method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111624544B (en) | Method and related device for identifying household transformer relation of transformer area | |
| CN109473945B (en) | Relay protection model data verification and automatic configuration method | |
| CN203643551U (en) | Traveling wave positioner | |
| CN102680775B (en) | Device and method for monitoring arrester resistance current by introducing unconventional potential transformer (PT) | |
| CN105319482A (en) | Power distribution network fault diagnosis system and method based on multi-source information fusion | |
| CN105116246A (en) | Power grid operation protection real-time online analysis method | |
| CN115684830A (en) | Fault location method and system based on COMTRADE | |
| CN102609501B (en) | Data cleaning method based on real-time historical database | |
| CN113238890B (en) | Current sampling loop abnormity diagnosis method and device based on dynamic record data | |
| CN110441657A (en) | Distribution system failure wave-recording method, apparatus and storage medium | |
| CN106841933B (en) | Transmission line fault comprehensive positioning method and system | |
| CN114125585A (en) | Monitoring and analyzing system and method for charging process of electric automobile charging pile | |
| CN111682444B (en) | Visual system of virtual terminal of digital transformer substation measurement | |
| CN110955808B (en) | Method for matching and associating four remote monitoring information of main plant station | |
| CN112014669A (en) | Online detection method and system for angle difference and ratio difference of merging unit | |
| CN117009610A (en) | K line graph visualization system and method based on power data | |
| CN208477056U (en) | A kind of railway power perforation online fault locator of cable run | |
| CN110688548A (en) | Historical inversion method and system for secondary circuit of intelligent substation | |
| Popovic et al. | Measures of value: data analytics for automated fault analysis | |
| CN115754509A (en) | Homologous waveform comparison and alignment method | |
| CN109270360B (en) | Method for calculating online line loss with high precision | |
| CN112002107B (en) | Automatic overheat alarm control box safety detection system based on 5G technology | |
| CN112531911B (en) | Equipment network measurement and control management system | |
| CN111813825B (en) | Distribution transformer outlet power failure event missing report automatic detection method and system | |
| CN114421617A (en) | Medium-voltage fault research and judgment method based on distribution network operation monitoring data |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |