CN109116187B - Wave recording synchronization method applied to transient wave recording type fault indicator - Google Patents
Wave recording synchronization method applied to transient wave recording type fault indicator Download PDFInfo
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- 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
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Abstract
The invention discloses a wave recording synchronization method applied to a transient wave recording type fault indicator, which is used for solving the 100 mus synchronization wave recording requirement and the low power consumption requirement of the transient wave recording type fault indicator. The collecting unit sends a time setting instruction to the collecting unit, and meanwhile, the time setting of communication time sequence and data sampling is realized; the acquisition unit records a first sampling point position after the time tick and a difference value of the two time tick positions; when a fault occurs, other acquisition units determine a waveform data extraction area and an extraction mode by simply and logically judging the position of the sampling point of the received fault phase and the difference value information, so that the recording synchronization is realized. The invention avoids the sending and receiving of the wake-up frame in communication, simplifies the time synchronization response mechanism, saves the complex crystal oscillator compensation algorithm and the mode of adding the time mark attribute to the sampling point, improves the execution efficiency of the CPU, ensures the wave recording synchronization precision and meets the low power consumption requirement of the acquisition unit.
Description
Technical Field
The invention relates to a wave recording synchronization method, in particular to a wave recording synchronization method applied to a transient wave recording type fault indicator.
Background
The transient recording type fault indicator mainly comprises a collecting unit and an acquisition unit. The acquisition units are installed on the overhead line, and three acquisition units installed on the three-phase line at the same position form a group, are respectively communicated with the collection unit, and are mainly used for line state monitoring and fault positioning in the power distribution network system.
The judgment and the positioning of the fault need to synthesize the current data acquired by the three acquisition units into zero sequence current. The accuracy of zero sequence current synthesis directly affects the accuracy of fault judgment. For this reason, the acquisition units on the three phases are required to maintain high-precision recording synchronization. The ' convergence unit ' specified in the national standard can synthesize the fault information and the waveforms sent by the 3 acquisition units into a waveform file, mark time parameters and send the waveform file to the master station, wherein the time scale error is less than 100 mu s '.
In the process of realizing wave recording synchronization, the sending of wireless wakeup frames, frequent time synchronization instruction response, complex crystal oscillator random offset and drift compensation algorithm and the method for adding time scale attributes to sampling points all put high requirements on the power consumption and the program processing capacity of the acquisition unit. Especially, in the time-keeping mode of cooperative work of the multi-crystal oscillator, some additional power consumption is increased compared with the time-keeping mode of the single-crystal oscillator. The national standard stipulates that the TA power supply 5s can meet the full-function working requirement when the line load current is not less than 5A.
The wave recording synchronization method of the transient wave recording type fault indicator in the prior art cannot meet the requirement on precision on one hand, and is not simple and reliable enough on the other hand, and cannot meet the requirement of low power consumption.
Disclosure of Invention
The invention provides a wave recording synchronization method applied to a transient wave recording type fault indicator, which aims to solve the technical problems that: the synchronous precision of the fault indicator is ensured, and the requirement of the acquisition unit on low power consumption is met.
The technical scheme of the invention is as follows:
a wave recording synchronization method applied to a transient wave recording type fault indicator comprises the following steps:
(1) the collecting unit broadcasts and sends the time setting instruction to the A-phase collecting unit, the B-phase collecting unit and the C-phase collecting unit, each collecting unit adjusts the communication time sequence of the collecting unit after receiving the time setting instruction, the communication time sequence of the collecting unit is consistent with the communication time sequence of the collecting unit, and the collecting unit is ensured to be automatically in a receiving state when the collecting unit sends the time setting instruction next time;
(2) after receiving a time synchronization instruction, the acquisition unit clears the current count value of the trigger ADC sampling timer to zero, times again, marks the position of the first sampling point in the buffer area after time synchronization as a sampling synchronization position, and simultaneously records the difference value between the current synchronization position and the last synchronization position, namely the number of the sampling points between two self synchronization positions;
(3) when the acquisition unit detects a fault, the fault phase acquisition unit calculates a starting position P for extracting the waveform from the buffer areastart1And a starting position Pstart1Relative to the latest synchronization position Psync1Relative position P ofΔ1，PΔ1＝Psync1-Pstart1Recording the sequence Flg of the sampling point of the initial position of the extracted waveform and the sampling point of the latest synchronous position, and simultaneously acquiring the number P of the sampling points between two synchronous positionsN1Then P is addedN1、PΔ1Flg and the waveform data are sent to other acquisition units, and the waveform data extracted from the buffer area by the Flg and the waveform data are sent to a collecting unit;
(4) the non-fault phase acquisition unit receives the P sent by the fault phase acquisition unitN1、PΔ1After Flg, extracting the number P of sampling points between two synchronous positions of the sampling pointN2A 1 is to PN2And PN1And comparing, determining the initial position and the data extraction mode of the waveform extracted by the self and combining the received Flg, and finally extracting waveform data to realize recording synchronization.
As a further improvement of the invention: the method for determining the initial position of the self-extracted waveform and the data extraction mode by the non-fault phase acquisition unit in the step (4) comprises the following steps:
non-failure phase acquisition unit according to PN1Flg and PN2Judging whether the fault phase acquisition unit has the condition of more acquisition or missing acquisition sampling points relative to the fault phase acquisition unit;
if the sampling is normal, the initial position of the extracted waveform is Pstart2＝Psync2-PΔ1，Psync2The synchronization position is the latest synchronization position in the non-fault phase acquisition unit;
if the condition of missing one point is present, the initial position of the extracted waveform is Pstart2＝Psync2-PΔ1+1, and is judged as Psync2Whether a supplementary sampling point A is needed before the position is equal to (A)sync2+Async2-1) /2, in the formula Async2Is Psync2Sampling point value of the location, Async2-1To synchronize the previous position, i.e. Psync2-1A sample point value for the location;
if there is more acquisition points, the initial position of the extracted waveform is Pstart2＝Psync2-PΔ1-1, and judging whether P needs to be deletedsync2The previous point of the location is deleted.
As a further improvement of the invention: if P isN2And PN1Equal or received Flg is equal to 1, and the fault phase acquisition unit extracts a waveform starting position Patart1Occurs at the latest synchronous position Psync1After sampling, the wave recording area has no condition of more or missing one point, namely the sampling is normal;
if P isN2Less than PN1And the received Flg is equal to 0, the fault phase acquisition unit extracts the starting position P of the waveformstart1Occurs at the latest synchronous position Psync1Before the sampling point, the condition of missing one point collection exists; at this time, it is judged to be Psync2The method for judging whether the sampling points need to be supplemented before the position is as follows: if the latest synchronous position P in the non-fault phase acquisition unitsync2If the waveform data is contained in the waveform data extraction interval, supplementing;
if P isN2Greater than PN1And the received Flg is equal to 0, the fault phase acquisition unit extracts the starting position P of the waveformstart1Occurs at the latest synchronous position Psync1Before the sampling point, the condition of collecting more points exists; at this time, it is determined whether P is requiredsync2The method for deleting the previous point of the position comprises the following steps: if P issync2-1If the waveform data is included in the waveform data extraction interval, the waveform data is deleted.
As a further improvement of the invention: the timer triggering the ADC sampling is driven by an RTC crystal oscillator, the precision is 5ppm, and the time interval between two times of time setting is less than 20 s.
Compared with the prior art, the invention has the following positive effects: (1) the invention utilizes the time setting instruction sent to the acquisition unit by the collection unit to realize the adjustment of the ADC sampling timer, completes the ADC sampling synchronization, and simultaneously adjusts the communication time sequence, so that the communication time sequence of the acquisition unit is synchronized with the communication time sequence of the collection unit, the acquisition unit can be automatically awakened on time at the time when the collection unit sends the time setting instruction next time, the collection unit does not need to additionally send an awakening frame to awaken the acquisition unit by the collection unit, and a frequent time setting response mechanism is eliminated; (2) only recording the difference value between the synchronous position of the sampling point at the time of time synchronization and the synchronous positions of the sampling points at two times in the time synchronization process, and avoiding the operation of adding time scale attributes to each sampling point; (3) when waveform data are extracted, the synchronism of recording can be ensured through simple logic judgment, the calculated amount is small, and the synchronization precision is high; (4) the temperature drift error generated by the crystal oscillator can generate uncertain influence on the compensation algorithm of the crystal oscillator due to the change of the environmental temperature, the low-speed high-precision crystal oscillator with the concentration of 5ppm is adopted, and the compensation algorithm is not used for compensating the offset and drift errors of the crystal oscillator after time synchronization is finished, so that the code is simplified, and the running power consumption of a CPU is reduced.
Drawings
FIG. 1 is a schematic diagram of the present invention during synchronization.
Fig. 2 is a flowchart of a recording procedure of the acquisition unit according to the present invention.
Detailed Description
The technical scheme of the invention is explained in detail according to the attached drawings:
as shown in fig. 1, the acquisition unit and the aggregation unit both include a 433MHz wireless module, the three acquisition units and the aggregation unit form a wireless network, the wireless network performs communication according to a set communication time sequence, and the communication time sequence is timed by a timer in each device.
The wireless modules of the collecting unit and the collecting unit are in a sleep state in most of time, enter a receiving state or a sending state for receiving and sending data according to the specified time in the communication time sequence, and continue to enter the sleep state after the data receiving and sending are finished so as to save power consumption.
The collecting unit broadcasts and sends the time setting instructions to the A-phase collecting unit, the B-phase collecting unit and the C-phase collecting unit, each collecting unit adjusts the communication time sequence of the collecting unit after receiving the time setting instructions, the communication time sequence of the collecting unit is consistent with the communication time sequence of the collecting unit, and the collecting unit is ensured to be automatically in a receiving state when the collecting unit sends the time setting instructions next time.
The sampling frequency of the ADC of the acquisition unit is controlled by PWM (pulse-width modulation) waves output by the timer, the clock source of the timer is 32.768KHz, the sampling frequency is 4096Hz, and a large cyclic data cache area is arranged in each acquisition unit and used for caching data acquired by the acquisition unit and caching 1s of current and electric field sampling data.
After each acquisition unit receives a time synchronization instruction, the current count value of a timer for triggering ADC sampling is cleared, so that the timer outputs a PWM waveform again to trigger ADC sampling and retiming, the first sampling point of each acquisition unit after time synchronization is ensured to be at the same moment, the position of the first sampling point in a buffer area after time synchronization is marked as a sampling synchronization position, and the number of the sampling points between the two synchronization positions of the current synchronization position and the last synchronization position is recorded.
In this embodiment, a crystal oscillator of 32.768KHz is selected, the precision is 5ppm, and after time synchronization is performed once, 20s of time is theoretically required for the synchronization error of each acquisition unit to reach 100us, so that the interval of the time synchronization instruction can be set between 0 and 20s, and the smaller the time synchronization interval is, the higher the precision of the synchronization error of wave recording is. When the time interval is set to 3s, the recording synchronization error can be less than 20 mus.
Fig. 2 is a flow chart illustrating the recording process after a fault occurs.
When the acquisition unit detects a fault, the fault phase acquisition unit calculates a starting position P for extracting the waveform from the buffer areastart1And a starting position Pstart1Relative to the latest synchronization position Psync1Relative position P ofΔ1，PΔ1＝Psync1-Pstart1Recording the sequence Flg of the sampling point of the initial position of the extracted waveform and the sampling point of the latest synchronous position, and simultaneously acquiring the number P of the sampling points between two synchronous positionsN1Then P is addedN1、PΔ1And Flg is sent to other acquisition units, and the waveform data extracted from the buffer area by the Flg is sent to the aggregation unit.
Referring to FIG. 2, other non-failure phase acquisition units receive P sent by the failure phase collection unitN1、PΔ1After Flg, extracting the number P of sampling points between two synchronous positions of the sampling pointN2A 1 is to PN2And PN1A comparison is made.
Due to different response time of receiving data by each wireless module and a time-keeping error caused by a crystal oscillator error of the acquisition unit, the acquisition unit is easy to conflict with the ADC sampling time when receiving the synchronous instruction. Therefore, before resynchronization is realized, the non-failure phase acquisition unit is easy to acquire one more point of ADC or one missing point of ADC relative to the failure phase acquisition unit at the synchronization moment, namely PN2Is not equal to PN1At this time, the synchronization error of the recording data is increased.
In order to ensure the low power consumption performance of the equipment, eliminate the influence of the phenomenon on the synchronization error and ensure high-precision synchronization under the condition of not increasing the time setting command receiving and sending frequency, the P-based synchronization method is requiredN2And PN1The size relationship of (2) makes different adjustments and compensations for the recording extraction position. The specific method comprises the following steps:
if P isN2And PN1Equal or received Flg is equal to 1, and the fault phase acquisition unit extracts a waveform starting position Pstart1Occurs at the latest synchronous position Psync1After the sampling point, if there is no more or missing acquisition of one point in the recording area, the non-fault phase acquisition unit calculates the initial position P of the extracted waveformstart2＝Psync2-PΔ1，Psync2The latest synchronous position in the non-fault phase acquisition unit is then extracted from the buffer by the non-fault phase acquisition unit, and the waveform data (such as 12 cycles) with required length is sent to a sinkAnd (4) collecting units.
If P isN2Less than PN1And the received Flg is equal to 0, the fault phase acquisition unit extracts the starting position P of the waveformstart1Occurs at the latest synchronous position Psync1Before the sampling point, the non-fault phase acquisition unit calculates the initial position P of the extracted waveformstart2＝Psync2-PΔ1+1, thus eliminating the calculation error caused by missing a point of collection of the non-fault phase collection unit; then judging the latest synchronous position P in the non-fault phase acquisition unitsync2Whether or not it is included in the waveform data extraction section, and if it is included, Psync2Supplementing a sampling point before the position for filling a point which is not collected by the non-fault phase collection unit, wherein the value A of the supplemented sampling point is equal to (A)sync2+Async2-1) /2, in the formula Async2Is Psync2Sampling point value of the location, Async2-1To synchronize the previous position, i.e. Psync2-1A sample point value for the location; the sampling interval is very small, and the values of the supplementary point and the missing sampling point are basically equal, so that the supplementary point cannot influence the integral wave recording precision. And finally, the non-fault phase acquisition unit extracts waveform data from the buffer area and sends the waveform data to the collection unit.
If P isN2Greater than PN1And the received Flg is equal to 0, the fault phase acquisition unit extracts the starting position P of the waveformstart1Occurs at the latest synchronous position Psync1Before the sampling point, the non-fault phase acquisition unit calculates the initial position P of the extracted waveformstart2＝Psync2-P Δ11, so as to eliminate the calculation error of the non-fault phase acquisition unit phase caused by acquiring one more point; judging P againsync2-1Whether or not to be included in the waveform data extraction section, and if so, Psync2-1Deleting position points, namely deleting more points acquired by the non-fault phase acquisition unit to ensure the synchronization precision of the whole wave recording data; and then the non-fault phase acquisition unit extracts waveform data from the buffer area and sends the waveform data to the aggregation unit.
While specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described herein are illustrative only and are not limiting to the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the claims appended hereto.
Claims (4)
1. A wave recording synchronization method applied to a transient wave recording type fault indicator is characterized by comprising the following steps:
(1) the collecting unit broadcasts and sends a time setting instruction to the A-phase collecting unit, the B-phase collecting unit and the C-phase collecting unit, and each collecting unit adjusts the communication time sequence of the collecting unit after receiving the time setting instruction, so that the communication time sequence of the collecting unit is consistent with the communication time sequence of the collecting unit, and each collecting unit is ensured to be in a receiving state automatically when the collecting unit sends the time setting instruction next time;
(2) after receiving a time synchronization instruction, each acquisition unit clears the current count value of the trigger ADC sampling timer to zero, times again, marks the position of the first sampling point in the buffer area after time synchronization as a sampling synchronous position, and simultaneously records the difference value between the current sampling synchronous position and the last sampling synchronous position, namely the number of the sampling points between two sampling synchronous positions;
(3) when any acquisition unit detects a fault, the fault phase acquisition unit calculates the initial position P for extracting the waveform from the buffer areastart1And a starting position Pstart1Relative to the latest sampling synchronization position Psync1Relative position P ofΔ1，PΔ1＝Psync1-Pstart1Recording the occurrence sequence Flg of the sampling point of the initial position of the extracted waveform and the sampling point of the latest sampling synchronous position, and simultaneously acquiring the number P of the sampling points between the two sampling synchronous positionsN1Then P is addedN1、PΔ1The Flg and the Flg are sent to a non-fault phase acquisition unit, and waveform data extracted from a buffer area by the Flg and the Flg are sent to a collecting unit;
(4) the non-fault phase acquisition unit receives the P sent by the fault phase acquisition unitN1、PΔ1And Flg, extracting the number P of sampling points between two sampling synchronous positions per seN2A 1 is to PN2And PN1And comparing, determining the initial position and the data extraction mode of the extracted waveform by combining the received Flg, and finally extracting waveform data to realize recording synchronization.
2. The method for synchronizing recording of a transient recording type fault indicator according to claim 1, wherein the method for determining the start position of the extracted waveform and the data extraction manner by the non-fault phase acquisition unit in the step (4) comprises:
non-failure phase acquisition unit according to PN1Flg and PN2Judging whether the fault phase acquisition unit has the condition of more acquisition or missing acquisition sampling points relative to the fault phase acquisition unit;
if the sampling is normal, the initial position of the extracted waveform is Pstart2＝Psync2-PΔ1，Psync2The sampling synchronization position is the latest sampling synchronization position in the non-fault phase acquisition unit;
if the condition of missing one point is present, the initial position of the extracted waveform is Pstart2＝Psync2-PΔ1+1, and is judged as Psync2Whether a supplementary sampling point A is needed before the position is equal to (A)sync2+Async2-1) /2, in the formula Async2Is Psync2Sampling point value of the location, Async2-1For the synchronous position of the previous sampling point position, i.e. Psync2-1A sample point value for the location;
if there is more acquisition points, the initial position of the extracted waveform is Pstart2＝Psync2-PΔ1-1, and judging whether P needs to be deletedsync2The previous point of the location is deleted.
3. The method of claim 2, wherein the method comprises:
if P isN2And PN1Equal or received Flg is 1, namely the fault phase acquisition unit extracts the starting position P of the waveformstart1At the latest sampling pointSampling synchronization position Psync1After sampling, the wave recording area has no condition of more or missing one point, namely the sampling is normal; if P isN2Less than PN1And the received Flg is equal to 0, namely the fault phase acquisition unit extracts the starting position P of the waveformstart1Occurs at the latest sampling synchronization position Psync1Before the sampling point, the condition of missing one point collection exists; at this time, it is judged to be Psync2The method for judging whether the sampling points need to be supplemented before the position is as follows: if the latest sampling synchronous position P in the non-fault phase acquisition unitsync2If the waveform data is contained in the waveform data extraction interval, supplementing;
if P isN2Greater than PN1And the received Flg is equal to 0, namely the fault phase acquisition unit extracts the starting position P of the waveformstart1Occurs at the latest sampling synchronization position Psync1Before the sampling point, the condition of collecting more points exists; at this time, it is determined whether P is requiredsync2The method for deleting the previous point of the position comprises the following steps: if P issync2-1If the waveform data is included in the waveform data extraction interval, the waveform data is deleted.
4. A method of synchronizing waveforms applied to a transient waveform recording type fault indicator as claimed in any one of claims 1 to 3, wherein: the timer triggering the ADC sampling is driven by an RTC crystal oscillator, the precision is 5ppm, and the time interval between two times of time setting is less than 20 s.
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| CN110429558A (en) * | 2019-07-31 | 2019-11-08 | 厦门四信通信科技有限公司 | A kind of three-phase recording, which synchronizes, looks for point methods, device and equipment |
| CN111220878B (en) * | 2019-12-10 | 2022-03-18 | 上海思源弘瑞自动化有限公司 | Synchronous wave recording method and device |
| CN110988599B (en) * | 2019-12-19 | 2022-03-25 | 长园深瑞继保自动化有限公司 | Distributed wave recording high-precision synchronization method for power distribution fault indicator |
| CN111398737B (en) * | 2020-04-08 | 2022-05-17 | 北京和信瑞通电力技术股份有限公司 | Recording management method and system applied to recording type fault indicator |
| CN111579918B (en) * | 2020-04-13 | 2022-03-04 | 上海紫通信息科技有限公司 | Sampling synchronous correction method for transient recording type fault indicator |
| CN112433178B (en) * | 2020-12-03 | 2022-06-03 | 石家庄科林电气股份有限公司 | Line fault detection method for synchronous synthesis of data among multiple devices |
| CN114594669B (en) * | 2020-12-04 | 2023-07-21 | 青岛鼎信通讯股份有限公司 | Accurate synchronization method for transient wave recording type fault indicator |
| CN112763852A (en) * | 2020-12-28 | 2021-05-07 | 和远智能科技股份有限公司 | Distribution line state monitoring system and method |
| CN112714459B (en) * | 2020-12-30 | 2022-07-19 | 石家庄科林电气股份有限公司 | Automatic frequency modulation method for fault indicator |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101028745B1 (en) * | 2008-05-15 | 2011-04-14 | 남서울대학교 산학협력단 | The Determination and Autonomous Isolation Method of Fault Zone based on Intelligent FRTU in Distribustion System |
| CN106556754A (en) * | 2016-10-12 | 2017-04-05 | 国网上海市电力公司 | A kind of online acquisition method of distribution line failure waveform |
| CN107015110A (en) * | 2017-04-01 | 2017-08-04 | 云南电网有限责任公司瑞丽供电局 | Synchronous recording fault location system, method |
| CN107219443A (en) * | 2017-08-03 | 2017-09-29 | 安徽科盟电子科技有限公司 | A kind of transient state recording indicator |
| CN107453405A (en) * | 2017-08-14 | 2017-12-08 | 光科技股份有限公司 | A kind of Fault Locating Method and system based on transient state recording fault detector |
| CN107959969A (en) * | 2017-12-11 | 2018-04-24 | 武汉中原电子信息有限公司 | A kind of method for synchronizing time applied to transient state recording type fault detector |
| CN108445279A (en) * | 2018-02-12 | 2018-08-24 | 北京和信瑞通电力技术股份有限公司 | Based on the wireless synchronous sampling method of short frequency in transient state recording type fault detector |
-
2018
- 2018-08-31 CN CN201811007916.4A patent/CN109116187B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101028745B1 (en) * | 2008-05-15 | 2011-04-14 | 남서울대학교 산학협력단 | The Determination and Autonomous Isolation Method of Fault Zone based on Intelligent FRTU in Distribustion System |
| CN106556754A (en) * | 2016-10-12 | 2017-04-05 | 国网上海市电力公司 | A kind of online acquisition method of distribution line failure waveform |
| CN107015110A (en) * | 2017-04-01 | 2017-08-04 | 云南电网有限责任公司瑞丽供电局 | Synchronous recording fault location system, method |
| CN107219443A (en) * | 2017-08-03 | 2017-09-29 | 安徽科盟电子科技有限公司 | A kind of transient state recording indicator |
| CN107453405A (en) * | 2017-08-14 | 2017-12-08 | 光科技股份有限公司 | A kind of Fault Locating Method and system based on transient state recording fault detector |
| CN107959969A (en) * | 2017-12-11 | 2018-04-24 | 武汉中原电子信息有限公司 | A kind of method for synchronizing time applied to transient state recording type fault detector |
| CN108445279A (en) * | 2018-02-12 | 2018-08-24 | 北京和信瑞通电力技术股份有限公司 | Based on the wireless synchronous sampling method of short frequency in transient state recording type fault detector |
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