CN108205096B - Multisource fault data analysis method based on active time correction - Google Patents
Multisource fault data analysis method based on active time correction Download PDFInfo
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Abstract
The invention discloses a multisource fault data analysis method based on active time correction, wherein a message-protecting main station actively initiates network time synchronization of each message-protecting substation, and records the time difference between the message-protecting substation and the message-protecting main station; the information-preserving substation initiates network time synchronization with equipment in the station, and the time difference between the information-preserving substation and the protection device as well as the fault recorder is recorded; generating more than ten correction single deviations according to the previous time difference, and averaging for multiple times to form a time correction value of each device; when the power grid fails, the information-protecting main station corrects the received information of each secondary device according to the device time correction value; and the information protection master station performs multi-source fault analysis on the action and alarm information of the corrected protection equipment and the recorded and broadcast file by combining the protection and the fault recorder. And the power grid fault data are rapidly and accurately obtained, the analysis and processing capacity of the power grid faults is greatly improved, the power supply is quickly recovered, the fault loss is reduced, and a powerful guarantee is provided for the operation monitoring of the power grid.
Description
Technical Field
The invention belongs to the field of relay protection fault information systems of power systems, and particularly relates to a multisource fault data analysis method based on active time correction.
Background
The construction of the domestic fault information system is continuously explored and improved for more than ten years. The early fault information system is mainly explored and tried, and the later stage is continuously improved, so that the functions of remote monitoring and information calling and inquiring are basically realized. The current better-condition area has the information-protecting main station entering the stage of improving the practical level and carrying out the regulation and control integrated operation, effectively realizes the on-line monitoring and management of the protection and wave recorder, and greatly improves the rapid acquisition, analysis and processing capability of the power grid fault information. The region with better current situation already enters a stage of improving the practical level and performing the regulation and control integrated operation. However, from the whole national perspective, the problems of inaccurate or even missing protection information, untimely information uploading, slow command response, slow acquisition of a wave recording file, low protection communication normal rate, poor fault analysis practicability and the like exist in a plurality of existing fault information systems, and the functional application of the fault information system is severely restricted.
According to long-term operation experience of each place and research and analysis of users and factories, most of problems are derived from the station end, and main reasons include insufficient information, irregular information, non-uniform communication mode, inaccurate equipment time and the like which are provided by a protection recorder. The fault data is obtained by the user, and the fault data is obtained by the user, so that the fault analysis is performed by the user.
Disclosure of Invention
The invention aims to provide a multisource fault data analysis method based on active time correction, which can effectively solve the problems that when equipment time of a protection device and a fault recorder in a transformer substation is inaccurate, a message-keeping master station cannot prepare according to equipment information time when fault data is tidied, and the accuracy of judging information is caused, so that a user cannot directly acquire the fault data.
In order to solve the technical problems, the invention is realized by the following technical scheme: a multisource fault data analysis method based on active time correction sequentially comprises the following steps:
step one: the information-protecting main station actively initiates network time synchronization of each information-protecting sub-station, and records the time difference delta t1 between the information-protecting sub-station and the information-protecting main station;
step two: the information-keeping master station actively informs the information-keeping sub-station to perform network time synchronization on the secondary equipment in the station, and the information-keeping sub-station records the time difference delta t2 between the information-keeping sub-station and the secondary equipment;
step three: the information-protecting substation sends the time difference delta t2 between the information-protecting substation and each secondary device in the station to the information-protecting main station, and the information-protecting main station stores the waiting time difference delta t2 between each secondary device and the information-protecting substation and the time difference delta t1 between the information-protecting substation and the information-protecting substation, so that the information-protecting main station has the time difference delta t3 between the information-protecting main station and each secondary device, and delta t3 = delta t1+ delta t2; repeating the first and second steps for a plurality of times, calculating deltat 3 for a plurality of times, and taking the average value of the three times as a time correction value deltat of the secondary equipment and the information-protecting main station;
step four: when the power grid fails, the secondary equipment sends messages such as actions, alarms, wave recording brief report messages and the like with the time of the secondary equipment to the information-preserving main station through the information-preserving substation, and transmits corresponding wave recording files; the information protection master station corrects the time T of the received information of each secondary device, and the corrected time is recorded as follows: t '=t+Δt, and according to the corrected time T', performing fault data arrangement and multi-source fault analysis;
step five: the information protection master station carries out the arrangement and analysis of the corrected power grid fault data on the action and alarm information of the corrected protection equipment, the protected wave recording file and the wave recording file of the fault wave recorder; recording wave files of a protection device in the same transformer substation aiming at the same fault, performing multi-source analysis on the wave files recorded by the fault recorder, and performing time alignment by using data of the same channel in different wave files; the information-protection master station performs multi-source analysis and time alignment on the wave-recording files of the protection devices in different substations with the same fault and the wave-recording files of the fault wave-recorder.
Preferably, in the first step, the message protection master station actively initiates network time synchronization with each message protection sub-station, the message protection master station sends a message with a time mark of the device to the message protection sub-station, the message protection sub-station adds a receiving time mark of the message protection sub-station when receiving the message of the initiating terminal, and adds a time mark of the message leaving the message protection sub-station when returning to the message protection master station, the message protection master station receives the corresponding message time mark, and calculates the time difference between the message protection master station and the message protection sub-station.
Preferably, in the second step, after the information-protecting substation receives the network time synchronization message actively notified by the information-protecting main station, the information-protecting substation performs network time synchronization according to the access network of the protection device and the fault recorder in the transformer substation, and calculates the time difference between the time of the information-protecting substation and the time of the protection device and the time of the fault recorder only through the message of the network time synchronization, so that the time of the protection device and the time of the fault recorder cannot be modified.
Preferably, in the third step, the message-protecting master station stores the waiting time difference between each secondary device and the message-protecting substation and the time difference between each secondary device and the message-protecting substation, so that the message-protecting master station calculates the time correction single deviation between each secondary device; the deviation of the information-protecting main station, the protection device and the fault recorder is calculated, the average value is calculated for a plurality of times, the calculated average value is used as the time correction value of each device, and the time correction value of each device is corrected.
Preferably, in the fourth step, when the power grid fails, the secondary device sends a message with actions, alarms, wave recording briefs and the like of the time of the device to the information-protecting main station through the information-protecting sub-station, and generates a corresponding wave recording file; the information protection master station corrects the time of the information of each secondary device, the correction time reaches the second level, and fault data arrangement and multi-source fault analysis are carried out according to the corrected time.
Preferably, in the fifth step, the information-protecting master station performs arrangement of power grid fault data according to the connection relation of the secondary equipment of the power grid and the time sequence of the information, and performs arrangement and analysis of the corrected power grid fault data on the corrected action and alarm information of the protection equipment, the protected wave recording file and the wave recording file of the fault wave recorder; when the waveforms in the same transformer substation are used for fault analysis, the protection device which acts in one transformer substation and different wave recording files of the fault recorder for recording the fault naturally contain some channel information of the same equipment because of the same fault; and processing by using the switch deflection information of the same digital channel and the difference value of the same analog channel to realize the combined display of the wave recording files under different sampling frequencies for users.
Preferably, in the fifth step, the information-protecting master station performs arrangement of power grid fault data according to the connection relation of the secondary equipment of the power grid and the time sequence of the information, and performs arrangement and analysis of the corrected power grid fault data on the corrected action and alarm information of the protection equipment, the protected wave recording file and the wave recording file of the fault wave recorder; when the fault analysis is carried out on waveforms in two substations when the line faults occur, as the two substations are involved, the data of the same equipment and the same channel cannot be aligned, at the moment, the angle difference of voltages at two ends of the line is calculated according to the parameters of the line stored by the information-preserving main station, the waveform data at two ends are offset according to the angle difference, so that the time alignment of the waveform data at two ends is realized, and the user can use the time alignment.
Compared with the prior art, the invention has the advantages that: the invention is based on an active time correction mechanism, and the information protection master station actively initiates network time synchronization with the protection device and the fault recorder and stores the time deviation between each device and the information protection master station. When faults occur, the protection device capable of automatically correcting time deviation and information sent by the fault recorder are realized, compatible arrangement of the information-protection master station on fault data of the accessed existing equipment containing inaccurate time marks is realized, the power grid fault data are rapidly and accurately obtained, the analysis processing capacity of the power grid faults is greatly improved, reference is provided for scheduling decision, power supply is quickly recovered, fault loss is reduced, and powerful guarantee is provided for power grid operation monitoring.
Drawings
FIG. 1 is a flow chart of the present invention
Fig. 2 is a schematic diagram of calculating a single time offset.
Fig. 3 is a schematic diagram of the security master station performing fault data analysis.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
Referring to fig. 1, an embodiment of a multi-source fault data analysis method based on active time correction is disclosed, wherein the method actively initiates network time synchronization with a message-protecting substation through a message-protecting master station, and records time difference between the message-protecting master station and the message-protecting substation; the information-preserving substation initiates network time synchronization with secondary equipment in the station, and the time difference between the information-preserving substation and the secondary equipment in the station is recorded; generating a time correction single deviation of each secondary device by the information protection main station according to the time difference between the information protection main station and the information protection sub station and the time difference between the information protection sub station and the equipment in the station, and carrying out multiple correction and averaging to form a time correction value of each secondary device; when the power grid fails, the information-protecting main station corrects the received information of each secondary device according to the device time correction value; the information-protection master station performs multi-source fault analysis by combining the corrected action and alarm information of the protection equipment with the wave recording file of the protection device and the wave recording file of the fault wave recorder.
Specifically, the multi-source fault data analysis method based on active time correction sequentially comprises the following steps:
step one: the information-protecting main station actively initiates network time synchronization of each information-protecting sub-station, and records the time difference delta t1 between the information-protecting sub-station and the information-protecting main station;
the message protection master station actively initiates network time pairs with all message protection substations, the flow of the network time pairs is shown in fig. 2, a network time protocol is used, the message with a time mark T1 of the equipment is sent to the message protection substations by the message protection master station, the message protection substations add a receiving time mark T2 of the message protection substations when receiving the message of an initiating terminal, and add a time mark T3 of the message leaving the message protection substations when returning to the message protection master station, the message protection master station receives a corresponding message Wen Shibiao T4, and the time difference delta T1 between the message protection master station and the message protection substations is calculated: ((T2-T1) + (T3-T4))/2.
Step two: the information-keeping master station actively informs the information-keeping sub-station to perform network time synchronization on the secondary equipment in the station, and the information-keeping sub-station records the time difference delta t2 between the information-keeping sub-station and the secondary equipment;
after the information-protecting substation receives the network time setting information actively notified by the information-protecting main station, the information-protecting substation carries out network time setting according to the access network of the protection device and the fault recorder in the transformer substation, and the information-protecting substation calculates the time difference between the information-protecting substation time and the time of the protection device and the time of the fault recorder only through the network time setting information, so that the time of the protection device and the time of the fault recorder cannot be modified.
Step three: generating a time correction single deviation by the information protection master station according to the time difference between the information protection master station and the information protection substation and the time difference between the information protection substation and equipment in the station, and performing multiple average value taking to form a time correction value of each equipment;
the information-protecting substation sends the time difference delta t2 between the information-protecting substation and each secondary device in the station to the information-protecting main station, the information-protecting main station stores the waiting time difference delta t2 between each secondary device and the information-protecting substation and the time difference delta t1 between the information-protecting substation, and thus the information-protecting main station has the time difference delta t3 between the information-protecting main station and each secondary device, and delta t3 = delta t1+ delta t2; repeating the first and second steps for a plurality of times, calculating deltat 3 for a plurality of times, and taking the average value of the three times as a time correction value deltat of the secondary equipment and the information-protecting main station;
because the time synchronization system is deployed in the existing transformer substation, after the time synchronization system has a problem and is subjected to maintenance treatment and recovery, the equipment in the transformer substation can finish the time synchronization to ensure the consistency of time, namely the clock deviation of the protection equipment and the fault recorder equipment can be changed; meanwhile, the protection device and the fault recorder equipment can have some inherent running deviation of the self time and can have slower or faster running of the equipment clock, so that the deviation of the security master station, the protection device and the fault recorder is calculated, the average value is calculated for a plurality of times and is used as the time correction value of each equipment, and the time correction value of each equipment is corrected according to a certain rule and time interval.
Step four: when the power grid fails, the information-protecting main station corrects the received information of each secondary device according to the device time correction value;
when the power grid fails, the secondary equipment sends messages such as actions, alarms, wave recording brief report messages and the like with the time of the secondary equipment to the information-preserving main station through the information-preserving substation, and transmits corresponding wave recording files; the information protection master station corrects the time T of the received information of each secondary device, and the corrected time is recorded as follows: t '=t+Δt, and according to the corrected time T', performing fault data arrangement and multi-source fault analysis;
and the information-protecting main station corrects the received information of each secondary device according to the device time correction value. Due to the limitation of the network on time protocol and inherent network delay characteristic of network transmission, the stored device time correction value of the information protection master station can only ensure the accuracy of second level, and meanwhile, when the power grid fault data of the information protection master station are tidied, the required data time can accurately reach more than second level according to the connection relation of the power grid secondary device and the time sequence of information.
Step five: the information-protecting master station performs multi-source fault analysis by combining the corrected action and alarm information of the protection equipment with the protected wave recording file and the wave recording file of the fault wave recorder;
the information protection master station carries out the arrangement and analysis of the corrected power grid fault data on the action and alarm information of the corrected protection equipment, the protected wave recording file and the wave recording file of the fault wave recorder; recording wave files of a protection device in the same transformer substation aiming at the same fault, performing multi-source analysis on the wave files recorded by the fault recorder, and performing time alignment by using data of the same channel in different wave files; the information-protection master station performs multi-source analysis and time alignment on the wave-recording files of the protection devices in different substations with the same fault and the wave-recording files of the fault wave-recorder.
The information protection master station carries out arrangement of power grid fault data according to the connection relation of the secondary equipment of the power grid and the time sequence of the information, and carries out arrangement and analysis of the corrected power grid fault data on the action, the alarm information and the protected wave recording file of the corrected protection equipment and the wave recording file of the fault wave recorder. In the analysis of the waveform file aiming at the same fault, after the time alignment of different wave recording files is needed, the accurate analysis and grasp of the fault by a user can be facilitated, and the analysis is shown in figure 3.
When the waveforms in the same transformer substation are used for fault analysis, the protection device which acts in one transformer substation and different wave recording files of the fault recorder for recording the fault naturally contain some channel information of the same equipment because of the same fault; and processing by using the switch deflection information of the same digital channel and the difference value of the same analog channel to realize the combined display of the wave recording files under different sampling frequencies for users.
When the fault analysis is carried out on waveforms in two substations when the line faults occur, as the two substations are involved, the data of the same equipment and the same channel cannot be aligned, at the moment, the angle difference of voltages at two ends of the line is calculated according to the parameters of the line stored by the information-preserving main station, the waveform data at two ends are offset according to the angle difference, so that the time alignment of the waveform data at two ends is realized, and the user can use the time alignment.
The above embodiments are merely illustrative embodiments of the present invention, but the technical features of the present invention are not limited thereto, and any changes or modifications made by those skilled in the art within the scope of the present invention are included in the scope of the present invention.
Claims (6)
1. A multisource fault data analysis method based on active time correction is characterized in that: the method sequentially comprises the following steps of:
step one: the information-protecting main station actively initiates network time synchronization of each information-protecting sub-station, and records the time difference delta t1 between the information-protecting sub-station and the information-protecting main station;
step two: the information-keeping master station actively informs the information-keeping sub-station to perform network time synchronization on the secondary equipment in the station, and the information-keeping sub-station records the time difference delta t2 between the information-keeping sub-station and the secondary equipment;
step three: the information-protecting substation sends the time difference delta t2 between the information-protecting substation and each secondary device in the station to the information-protecting main station, the information-protecting main station stores the time difference delta t2 between each secondary device and the information-protecting substation and the time difference delta t1 between the information-protecting substation, and thus the information-protecting main station has the time difference delta t3 between the information-protecting main station and each secondary device, and delta t3 = delta t1+ delta t2; repeating the first and second steps for a plurality of times, calculating deltat 3 for a plurality of times, and taking the average value of the three times as a time correction value deltat of the secondary equipment and the information-protecting main station;
step four: when the power grid fails, the secondary equipment sends action, alarm and wave recording brief message with the time of the secondary equipment to the information-preserving main station through the information-preserving substation, and transmits corresponding wave recording files; the information protection master station corrects the time T of the received information of each secondary device, and the corrected time is recorded as follows: t '=t+Δt, and according to the corrected time T', performing fault data arrangement and multi-source fault analysis;
step five: the information protection master station carries out the arrangement and analysis of the corrected power grid fault data on the action and alarm information of the corrected protection equipment, the protected wave recording file and the wave recording file of the fault wave recorder; recording wave files of a protection device in the same transformer substation aiming at the same fault, performing multi-source analysis on the wave files recorded by the fault recorder, and performing time alignment by using data of the same channel in different wave files; the information-protection master station performs multi-source analysis and time alignment on the protection device record files and fault recorder record files in different substations with the same fault; the information protection master station carries out arrangement of power grid fault data according to the connection relation of the secondary equipment of the power grid and the time sequence of the information, and carries out arrangement and analysis of the corrected power grid fault data on the action, the alarm information and the protected wave recording file of the corrected protection equipment and the wave recording file of the fault wave recorder; when the waveforms in the same transformer substation are used for fault analysis, the protection device which acts in one transformer substation and different wave recording files of the fault recorder for recording the fault naturally contain some channel information of the same equipment because of the same fault; and processing by using the switch deflection information of the same digital channel and the difference value of the same analog channel to realize the combined display of the wave recording files under different sampling frequencies.
2. A multisource fault data analysis method based on active time correction is characterized in that: the method sequentially comprises the following steps of:
step one: the information-protecting main station actively initiates network time synchronization of each information-protecting sub-station, and records the time difference delta t1 between the information-protecting sub-station and the information-protecting main station;
step two: the information-keeping master station actively informs the information-keeping sub-station to perform network time synchronization on the secondary equipment in the station, and the information-keeping sub-station records the time difference delta t2 between the information-keeping sub-station and the secondary equipment;
step three: the information-protecting substation sends the time difference delta t2 between the information-protecting substation and each secondary device in the station to the information-protecting main station, the information-protecting main station stores the time difference delta t2 between each secondary device and the information-protecting substation and the time difference delta t1 between the information-protecting substation, and thus the information-protecting main station has the time difference delta t3 between the information-protecting main station and each secondary device, and delta t3 = delta t1+ delta t2; repeating the first and second steps for a plurality of times, calculating deltat 3 for a plurality of times, and taking the average value of the three times as a time correction value deltat of the secondary equipment and the information-protecting main station;
step four: when the power grid fails, the secondary equipment sends action, alarm and wave recording brief message with the time of the secondary equipment to the information-preserving main station through the information-preserving substation, and transmits corresponding wave recording files; the information protection master station corrects the time T of the received information of each secondary device, and the corrected time is recorded as follows: t '=t+Δt, and according to the corrected time T', performing fault data arrangement and multi-source fault analysis;
step five: the information protection master station carries out the arrangement and analysis of the corrected power grid fault data on the action and alarm information of the corrected protection equipment, the protected wave recording file and the wave recording file of the fault wave recorder; recording wave files of a protection device in the same transformer substation aiming at the same fault, performing multi-source analysis on the wave files recorded by the fault recorder, and performing time alignment by using data of the same channel in different wave files; the information-protection master station performs multi-source analysis and time alignment on the protection device record files and fault recorder record files in different substations with the same fault; the information protection master station carries out arrangement of power grid fault data according to the connection relation of the secondary equipment of the power grid and the time sequence of the information, and carries out arrangement and analysis of the corrected power grid fault data on the action, the alarm information and the protected wave recording file of the corrected protection equipment and the wave recording file of the fault wave recorder; when the fault analysis is carried out on waveforms in two substations when the line faults occur, the two substations are involved, and data of the same equipment and the same channel cannot be aligned, at the moment, the angle difference of voltages at two ends of the line is calculated according to the parameters of the line stored by the information-protection master station, and the waveform data at two ends are offset according to the angle difference, so that the time alignment of the waveform data at two ends is realized.
3. A method of active time correction based multisource fault data analysis as claimed in claim 1 or claim 2 wherein: in the first step, the message protection master station actively initiates the network time synchronization with each message protection sub-station, the used network time protocol is that the message protection master station sends a message with the time mark of the device to the message protection sub-station, the message protection sub-station adds the receiving time mark of the message protection sub-station when receiving the message of the initiating terminal, and adds the time mark of the message leaving the message protection sub-station when returning to the message protection master station, the message protection master station receives the corresponding message time mark, and the time difference between the message protection master station and the message protection sub-station is calculated.
4. A method of active time correction based multisource fault data analysis as claimed in claim 1 or claim 2 wherein: in the second step, after the information-protecting sub-station receives the network time setting message actively notified by the information-protecting main station, the information-protecting sub-station performs network time setting according to the access network of the protection device and the fault recorder in the transformer substation, and calculates the time difference between the time of the information-protecting sub-station and the time of the protection device and the time of the fault recorder only through the message of the network time setting, so that the time of the protection device and the time of the fault recorder cannot be modified.
5. A method of active time correction based multisource fault data analysis as claimed in claim 1 or claim 2 wherein: in the third step, the information-protecting main station saves the time difference between each secondary device and the information-protecting sub-station and the time difference between each secondary device and the information-protecting sub-station, so that the information-protecting main station calculates the time correction single deviation between each secondary device; the deviation of the information-protecting main station, the protection device and the fault recorder is calculated, the average value is calculated for a plurality of times, the calculated average value is used as the time correction value of each device, and the time correction value of each device is corrected.
6. A method of active time correction based multisource fault data analysis as claimed in claim 1 or claim 2 wherein: in the fourth step, when the power grid fails, the secondary equipment sends action, alarm and wave recording brief messages with the time of the equipment to the information-protecting main station through the information-protecting sub-station, and generates corresponding wave recording files; the information protection master station corrects the time of the information of each secondary device, the correction time reaches the second level, and fault data arrangement and multi-source fault analysis are carried out according to the corrected time.
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| CN109655692B (en) * | 2018-12-28 | 2021-04-06 | 中国南方电网有限责任公司 | Transient homologous data comparison method based on wave recording file |
| CN110300021B (en) * | 2019-06-20 | 2022-09-16 | 广西电网有限责任公司 | Method and computing device for computing data processing time of recording bulletin of substation |
| CN110895321B (en) * | 2019-12-06 | 2021-12-10 | 南京南瑞继保电气有限公司 | Secondary equipment time mark alignment method based on recording file reference channel |
| CN111143622B (en) * | 2019-12-28 | 2023-06-09 | 国网安徽省电力有限公司 | Fault data set construction method based on big data platform |
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