CN111398737A - Recording management method and system applied to recording type fault indicator - Google Patents
Recording management method and system applied to recording type fault indicator Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/088—Aspects of digital computing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The invention provides a recording management method and a recording management system applied to a recording fault indicator, wherein the recording management system is provided with a collecting unit and a collecting unit, the collecting unit is arranged on A, B, C three phases of an overhead line, the collecting unit is arranged on a tower near the collecting unit, the collecting unit and the collecting unit are in wireless communication through 433MHz, when the line has a fault, the fault line starts recording, the non-fault line starts recording synchronously, and after the recording is finished, the collecting unit calls recording information and recording data of the three-phase collecting unit to synthesize zero-sequence current and generate a recording file, so that the accuracy and the stability of the recording of the collecting unit are improved through the optimization of a process and a management method, and the phenomenon that the recording of the recording fault indicator is started by mistake or is not started in the operation process is prevented.
Description
Technical Field
The invention relates to the technical field of distribution line state monitoring, in particular to a recording management method and a recording management system applied to a recording type fault indicator.
Background
Along with the development of intelligent power distribution network, distribution lines state monitoring is also more important in the distribution automation field, and fault indicator is the important equipment of distribution lines state monitoring for realize distribution lines's fault location. The transient recording type fault indicator is a type of fault indicator, and fault judgment and positioning of a line are realized through high-speed sampling and recording analysis, so that the accuracy of fault judgment and positioning is directly determined by the quality of the recording of the transient recording type fault indicator. Through optimization and improvement of the wave recording process of the transient wave recording type fault indicator, the accuracy and stability of wave recording can be improved, and higher-quality basic data are prepared for subsequent fault positioning and judgment.
However, in the prior art, the wave recording type fault indicator is often started by mistake or not started, and the reliability and the safety of the power distribution network are affected.
Disclosure of Invention
The invention aims to provide a recording management method and a recording management system applied to a recording type fault indicator, which aim to solve the problem that the fault indicator in the prior art is started by mistake or not started, improve the accuracy and stability of recording of an acquisition unit and prevent the phenomenon that the recording of the recording type fault indicator is started by mistake or not started in the running process.
In order to achieve the technical purpose, the invention provides a recording management method applied to a recording type fault indicator, which comprises the following operations:
the acquisition unit acquires the change conditions of the current and the electric field, copies data in the sampling cache to the wave recording cache when preset conditions are met, and sends a synchronous starting instruction;
the acquisition unit analyzes the time setting label and the sampling count value of the synchronous starting instruction, and judges whether the wave recording of the starting is effective or not according to the time setting label and the sampling count value;
the collecting unit locks the three-phase recording cache, compares and analyzes the three-phase recording information, calculates the absolute time of each phase of recording data, and calls to collect the recording data when the absolute time difference is not greater than a preset time interval.
Preferably, the preset conditions are specifically:
when the current sampling values continuously satisfy I (k) > I (k-N) > I (k-2N) and the value of delta I ═ (I (k) -I (k-N)) - (I (k-N) -I (k-2N)) is continuously greater than the set sudden change threshold value for 5 times, the system marks that the current sudden change is started;
when the electric field of the system is normal and the value of delta U ═ U (k) -U (k-N)) - (U (k-N) -U (k-2N)) is greater than the set abrupt electric field threshold value for 3 consecutive times, the system marks that the electric field abrupt change starts.
Preferably, the step of judging whether the wave recording started at this time is valid by using the time tick mark and the sampling count value specifically includes:
the started phase analyzes a starting time tick mark and an AD sampling counter of the synchronous starting command, and assumes that a1 is the synchronous time tick mark, b1 is the AD sampling counter, a2 is the recording time tick mark stored inside the started phase, b2 is the AD sampling counter stored inside the started phase, 8000 is the time tick sampling interval of the system, and when (a1 8000+ b1) - (a2 8000+ b2) > < 20 > is satisfied, the started phase considers the received synchronous starting command to be valid.
Preferably, the acquisition units are installed on three phases of an overhead line, the collection unit is installed on an electric power tower, and data interaction is performed among the collection unit, the acquisition units and the acquisition units in a 433MHz wireless mode.
The invention also provides a recording management system applied to the recording type fault indicator, which comprises the following components:
the wave recording starting module is used for acquiring the change conditions of the current and the electric field by the acquisition unit, copying data in the sampling cache to a wave recording cache when preset conditions are met, and sending a synchronous starting instruction;
the recording data effective judgment module is used for analyzing the time setting label and the sampling count value of the synchronous starting instruction by the acquisition unit and judging whether the recording of the current starting is effective or not according to the time setting label and the sampling count value;
and the recording data calling module is used for locking the three-phase recording cache by the collecting unit, comparing and analyzing the three-phase recording information, calculating the absolute time of each phase of recording data, and calling and acquiring the recording data when the absolute time difference is not greater than a preset time interval.
Preferably, the preset conditions are specifically:
when the current sampling values continuously satisfy I (k) > I (k-N) > I (k-2N) and the value of delta I ═ (I (k) -I (k-N)) - (I (k-N) -I (k-2N)) is continuously greater than the set sudden change threshold value for 5 times, the system marks that the current sudden change is started;
when the electric field of the system is normal and the value of delta U ═ U (k) -U (k-N)) - (U (k-N) -U (k-2N)) is greater than the set abrupt electric field threshold value for 3 consecutive times, the system marks that the electric field abrupt change starts.
Preferably, the condition whether the recording started this time is valid is as follows:
the started phase analyzes a starting time tick mark and an AD sampling counter of the synchronous starting command, and assumes that a1 is the synchronous time tick mark, b1 is the AD sampling counter, a2 is the recording time tick mark stored inside the started phase, b2 is the AD sampling counter stored inside the started phase, 8000 is the time tick sampling interval of the system, and when (a1 8000+ b1) - (a2 8000+ b2) > < 20 > is satisfied, the started phase considers the received synchronous starting command to be valid.
Preferably, the acquisition units are installed on three phases of an overhead line, the collection unit is installed on an electric power tower, and data interaction is performed among the collection unit, the acquisition units and the acquisition units in a 433MHz wireless mode.
The effect provided in the summary of the invention is only the effect of the embodiment, not all the effects of the invention, and one of the above technical solutions has the following advantages or beneficial effects:
compared with the prior art, the invention is provided with the collecting unit and the collecting unit, the collecting unit is arranged on A, B, C three phases of an overhead line, the collecting unit is arranged on a tower near the collecting unit, wireless communication is carried out between the collecting unit and the collecting unit through 433MHz, when a line has a fault, the fault line starts wave recording, a non-fault line starts wave recording synchronously, the collecting unit calls the wave recording information and the wave recording data of the three-phase collecting unit to synthesize zero sequence current and generate a wave recording file after the wave recording is finished, so that the wave recording accuracy and stability of the collecting unit are improved through the optimization of a process and a management method, and the phenomenon that a wave recording fault indicator is started by mistake or not started in the operation process is prevented.
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Fig. 1 is a flowchart of a recording management method applied to a recording fault indicator according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a transient recording-type fault indicator system according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a wave recording process of a transient wave recording type fault indicator according to an embodiment of the present invention;
fig. 4 is a block diagram of a recording management system applied to a recording fault indicator according to an embodiment of the present invention.
Detailed Description
In order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and procedures are omitted so as to not unnecessarily limit the invention.
The following describes a recording management method and system applied to a recording fault indicator in detail with reference to the accompanying drawings.
As shown in fig. 1, the present invention discloses a recording management method applied to a recording type fault indicator, the method includes the following operations:
collecting the change conditions of the current and the electric field, copying data in the sampling cache to a wave recording cache when preset conditions are met, and sending a synchronous starting instruction;
analyzing the time setting label and the sampling count value of the synchronous starting instruction, and judging whether the wave recording of the starting is effective or not through the time setting label and the sampling count value;
and locking the three-phase recording cache, comparing and analyzing the three-phase recording information, calculating the absolute time of each phase of recording data, and calling to acquire the recording data when the absolute time difference is not greater than a preset time interval.
As shown in fig. 2, the acquisition units of the corresponding phases are installed on A, B, C three phases of the overhead line at the unified position, the collection unit is installed on the power tower, and the collection unit performs data interaction with the acquisition units and the acquisition units in a 433MHz wireless manner.
The acquisition unit acquires the current and the induction electric field of the three-phase line in real time, the sampling frequency is 400MHz, the acquisition unit reserves 4K byte cache space for the current and the electric field respectively, and reserves 2K byte wave recording cache.
The acquisition unit calculates the current and the change condition of the electric field point by point at intervals of 7ms in the following calculation mode:
when the current sampling values continuously satisfy I (k) > I (k-N) > I (k-2N) and the value of delta I ═ (I (k) -I (k-N)) - (I (k-N) -I (k-2N)) is continuously greater than the set sudden change threshold value for 5 times, the system marks that the current sudden change starts, and N is the number of sampling points of 1 cycle and is taken as 80.
When the electric field of the system is normal and the value of delta U (k) -U (k-N)) - (U (k-N) -U (k-2N)) is greater than the set abrupt electric field threshold value for 3 times continuously, the system marks that the electric field is abruptly started, the start phase starts to copy the data in the sampling buffer into the wave recording buffer, and a synchronization start instruction is sent.
The acquisition unit judges whether the recording started at this time is effective, and when the ground fault or the short-circuit fault is detected, the recording is confirmed to be effective. The started phase analyzes a starting time tick mark and an AD sampling counter of the synchronous starting command, and assumes that a1 is the synchronous time tick mark, b1 is the AD sampling counter, a2 is the recording time tick mark stored inside the started phase, b2 is the AD sampling counter stored inside the started phase, 8000 is the time tick sampling interval of the system, and when (a1 8000+ b1) - (a2 8000+ b2) > < 20 > is satisfied, the started phase considers the received synchronous starting command to be valid.
The started phase calculates the recording start of the phase through the received synchronous time tick mark and the AD sampling count value and the self real-time synchronous time tick mark and the AD sampling count value, and copies the data of 5 cycles which are started by the starting point to the recording cache.
As shown in fig. 3, after the start of recording, a recording completion instruction is sent, and the collection unit sends a recording lock to lock the recording cache of the three-phase acquisition unit, so as to prevent the acquisition unit from recording repeatedly. And unlocking the wave recording cache after the wave recording data is transmitted or overtime and invalid. The acquisition unit times through internal timer TA1, and the recording buffer is unlocked when the time reaches the threshold of 2 minutes.
The collecting unit calls the recording information of the three phases of the collecting unit A, B, C one by one, calculates the absolute time of the recording data of each phase according to the recording information content, and starts to call and collect the recording data when the absolute time difference is not more than 5 ms.
According to the collecting unit and the collecting unit which are arranged in the embodiment of the invention, the collecting unit is arranged on A, B, C three phases of an overhead line, the collecting unit is arranged on a tower near the collecting unit, wireless communication is carried out between the collecting unit and the collecting unit through 433MHz, when a line fails, a fault line starts wave recording, a non-fault line starts wave recording synchronously, and after wave recording is completed, the collecting unit calls wave recording information and wave recording data of the three-phase collecting unit to synthesize zero sequence current and generate a wave recording file, so that the wave recording accuracy and stability of the collecting unit are improved through optimization of a process and a management method, and the phenomenon that a wave recording fault indicator is started by mistake or is not started in the operation process is prevented.
As shown in fig. 4, an embodiment of the present invention further discloses a recording management system applied to a recording type fault indicator, where the system includes:
the wave recording starting module is used for acquiring the change conditions of the current and the electric field by the acquisition unit, copying data in the sampling cache to a wave recording cache when preset conditions are met, and sending a synchronous starting instruction;
the recording data effective judgment module is used for analyzing the time setting label and the sampling count value of the synchronous starting instruction by the acquisition unit and judging whether the recording of the current starting is effective or not according to the time setting label and the sampling count value;
and the recording data calling module is used for locking the three-phase recording cache by the collecting unit, comparing and analyzing the three-phase recording information, calculating the absolute time of each phase of recording data, and calling and acquiring the recording data when the absolute time difference is not greater than a preset time interval.
The method comprises the steps that acquisition units of corresponding phases are installed on A, B, C three phases of an overhead line unified position, a collection unit is installed on an electric power tower, and data interaction is carried out among the collection unit, the acquisition units and the collection units in a 433MHz wireless mode.
The acquisition unit acquires the current and the induction electric field of the three-phase line in real time, the sampling frequency is 400MHz, the acquisition unit reserves 4K byte cache space for the current and the electric field respectively, and reserves 2K byte wave recording cache.
The acquisition unit calculates the current and the change condition of the electric field point by point at intervals of 7ms in the following calculation mode:
when the current sampling values continuously satisfy I (k) > I (k-N) > I (k-2N) and the value of delta I ═ (I (k) -I (k-N)) - (I (k-N) -I (k-2N)) is continuously greater than the set sudden change threshold value for 5 times, the system marks that the current sudden change starts, and N is the number of sampling points of 1 cycle and is taken as 80.
When the electric field of the system is normal and the value of delta U (k) -U (k-N)) - (U (k-N) -U (k-2N)) is greater than the set abrupt electric field threshold value for 3 times continuously, the system marks that the electric field is abruptly started, the start phase starts to copy the data in the sampling buffer into the wave recording buffer, and a synchronization start instruction is sent.
The acquisition unit judges whether the recording started at this time is effective, and when the ground fault or the short-circuit fault is detected, the recording is confirmed to be effective. The started phase analyzes a starting time tick mark and an AD sampling counter of the synchronous starting command, and assumes that a1 is the synchronous time tick mark, b1 is the AD sampling counter, a2 is the recording time tick mark stored inside the started phase, b2 is the AD sampling counter stored inside the started phase, 8000 is the time tick sampling interval of the system, and when (a1 8000+ b1) - (a2 8000+ b2) > < 20 > is satisfied, the started phase considers the received synchronous starting command to be valid.
The started phase calculates the recording start of the phase through the received synchronous time tick mark and the AD sampling count value and the self real-time synchronous time tick mark and the AD sampling count value, and copies the data of 5 cycles which are started by the starting point to the recording cache.
And after the phase recording is started, a recording completion instruction is sent, and the collection unit sends a recording to lock the recording cache of the three-phase acquisition unit, so that the acquisition unit is prevented from recording repeatedly. And unlocking the wave recording cache after the wave recording data is transmitted or overtime and invalid. The acquisition unit times through internal timer TA1, and the recording buffer is unlocked when the time reaches the threshold of 2 minutes.
The collecting unit calls the recording information of the three phases of the collecting unit A, B, C one by one, calculates the absolute time of the recording data of each phase according to the recording information content, and starts to call and collect the recording data when the absolute time difference is not more than 5 ms.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A recording management method for a recording type fault indicator, the method comprising the operations of:
the acquisition unit acquires the change conditions of the current and the electric field, copies data in the sampling cache to the wave recording cache when preset conditions are met, and sends a synchronous starting instruction;
the acquisition unit analyzes the time setting label and the sampling count value of the synchronous starting instruction, and judges whether the wave recording of the starting is effective or not according to the time setting label and the sampling count value;
the collecting unit locks the three-phase recording cache, compares and analyzes the three-phase recording information, calculates the absolute time of each phase of recording data, and calls to collect the recording data when the absolute time difference is not greater than a preset time interval.
2. The method according to claim 1, wherein the preset conditions are specifically:
when the current sampling values continuously satisfy I (k) > I (k-N) > I (k-2N) and the value of delta I ═ (I (k) -I (k-N)) - (I (k-N) -I (k-2N)) is continuously greater than the set sudden change threshold value for 5 times, the system marks that the current sudden change is started;
when the electric field of the system is normal and the value of delta U ═ U (k) -U (k-N)) - (U (k-N) -U (k-2N)) is greater than the set abrupt electric field threshold value for 3 consecutive times, the system marks that the electric field abrupt change starts.
3. The method according to claim 1, wherein the determining whether the recording of the current start is valid by the time tick and the sample count value specifically comprises:
the started phase analyzes a starting time tick mark and an AD sampling counter of the synchronous starting command, and assumes that a1 is the synchronous time tick mark, b1 is the AD sampling counter, a2 is the recording time tick mark stored inside the started phase, b2 is the AD sampling counter stored inside the started phase, 8000 is the time tick sampling interval of the system, and when (a1 8000+ b1) - (a2 8000+ b2) > < 20 > is satisfied, the started phase considers the received synchronous starting command to be valid.
4. The method for managing the recording waves applied to the recording wave type fault indicator of claim 1, wherein the collecting units are installed on three phases of an overhead line, the collecting unit is installed on an electric tower, and data interaction is performed among the collecting unit, the collecting unit and the collecting unit in a 433MHz wireless mode.
5. A recording management system for use with a recording-type fault indicator, the system comprising:
the wave recording starting module is used for acquiring the change conditions of the current and the electric field by the acquisition unit, copying data in the sampling cache to a wave recording cache when preset conditions are met, and sending a synchronous starting instruction;
the recording data effective judgment module is used for analyzing the time setting label and the sampling count value of the synchronous starting instruction by the acquisition unit and judging whether the recording of the current starting is effective or not according to the time setting label and the sampling count value;
and the recording data calling module is used for locking the three-phase recording cache by the collecting unit, comparing and analyzing the three-phase recording information, calculating the absolute time of each phase of recording data, and calling and acquiring the recording data when the absolute time difference is not greater than a preset time interval.
6. The system according to claim 5, wherein the preset conditions are specifically:
when the current sampling values continuously satisfy I (k) > I (k-N) > I (k-2N) and the value of delta I ═ (I (k) -I (k-N)) - (I (k-N) -I (k-2N)) is continuously greater than the set sudden change threshold value for 5 times, the system marks that the current sudden change is started;
when the electric field of the system is normal and the value of delta U ═ U (k) -U (k-N)) - (U (k-N) -U (k-2N)) is greater than the set abrupt electric field threshold value for 3 consecutive times, the system marks that the electric field abrupt change starts.
7. The system according to claim 5, wherein the condition whether the recording of the current start is valid is:
the started phase analyzes a starting time tick mark and an AD sampling counter of the synchronous starting command, and assumes that a1 is the synchronous time tick mark, b1 is the AD sampling counter, a2 is the recording time tick mark stored inside the started phase, b2 is the AD sampling counter stored inside the started phase, 8000 is the time tick sampling interval of the system, and when (a1 8000+ b1) - (a2 8000+ b2) > < 20 > is satisfied, the started phase considers the received synchronous starting command to be valid.
8. The recording management system for the recording type fault indicator according to claim 5, wherein the collecting unit is installed on three phases of an overhead line, the collecting unit is installed on an electric tower, and data interaction is performed among the collecting unit, the collecting unit and the collecting unit in a 433MHz wireless mode.
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| CN113189517A (en) * | 2021-04-26 | 2021-07-30 | 福建奥通迈胜电力科技有限公司 | Analysis method for efficient transmission and filtering of ground fault recording file |
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| CN113189517A (en) * | 2021-04-26 | 2021-07-30 | 福建奥通迈胜电力科技有限公司 | Analysis method for efficient transmission and filtering of ground fault recording file |
| CN113189517B (en) * | 2021-04-26 | 2022-06-10 | 福建奥通迈胜电力科技有限公司 | Analysis method for efficient transmission and filtering of ground fault recording file |
| CN113589064A (en) * | 2021-06-21 | 2021-11-02 | 华能西藏雅鲁藏布江水电开发投资有限公司 | Hydropower plant fault recording implementation method and system with chain starting function |
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