CN107167712A - A kind of power cable partial discharge synchronous collection method and system based on GPS - Google Patents
A kind of power cable partial discharge synchronous collection method and system based on GPS Download PDFInfo
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- CN107167712A CN107167712A CN201710404006.9A CN201710404006A CN107167712A CN 107167712 A CN107167712 A CN 107167712A CN 201710404006 A CN201710404006 A CN 201710404006A CN 107167712 A CN107167712 A CN 107167712A
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 32
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- 238000004891 communication Methods 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 230000002123 temporal effect Effects 0.000 claims description 3
- 235000013399 edible fruits Nutrition 0.000 claims description 2
- 238000012795 verification Methods 0.000 claims description 2
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- 238000005516 engineering process Methods 0.000 description 1
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- VIKNJXKGJWUCNN-XGXHKTLJSA-N norethisterone Chemical compound O=C1CC[C@@H]2[C@H]3CC[C@](C)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1 VIKNJXKGJWUCNN-XGXHKTLJSA-N 0.000 description 1
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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Abstract
The invention discloses a kind of power cable partial discharge synchronous collection method based on GPS, comprise the following steps：Principal and subordinate's collector initializes the serial ports parameter being connected with GPS module respectively first, and receives the string data in GPS module, and data are checked, the collector systems time is proofreaded when qualified；Main collector first school when, then notify from collector acquisition time, and trigger main acquisition module gathered data, main collector is also asked from collector gathered data；Come acquisition time, the collection request of autonomous collector from collector reception, and trigger from acquisition module gathered data；The data that principal and subordinate gathers are matched and positioned；This method realizes cable two ends time synchronized Du Genggao by using gps clock, and positioning precision is more accurate, so as to be quickly found out cable discharge source, improves power supply quality；The invention also discloses a kind of power cable partial discharge synchronous based on GPS.
Description
Technical field
Field is gathered the present invention relates to power cable partial discharge, more particularly to a kind of power cable partial discharge based on GPS is synchronous
Acquisition method, further relates to a kind of power cable partial discharge synchronous based on GPS.
Background technology
With the continuous quickening of urbanization process, power cable is just being increasingly subject to people's as most important transmission of electricity instrument
Concern and attention, wherein the research to power cable discharge source is also paid attention to by more and more researchers.At present to electric power
The localization method of cable local discharge has a lot, wherein the method for comparing main flow is using traveling wave positioning, mainly including single-ended and
Two methods of both-end, the former is according to being that the transient state travelling wave that produces is propagated along cable to two ends when partial discharge occurs, when running into different Jie
Refraction occurs during matter and reflects, discharge position place is determined using the time difference of back wave；The latter is transmitted using traveling wave to two ends
The time difference of two ends synchronous acquisition is carried out to be positioned.Because single-ended reflection propagation path is longer, add through overdischarge
The influence of transition impedance during point, pulse signal decay can be than more serious, therefore the error positioned in actual applications is larger.Compare and
Speech, both-end positioning is not then by above-mentioned interference, and it is same to carry out that it mainly sets accurate time synchronism apparatus at cut cable two ends
Step, the waveform then gathered according to two ends is positioned, and its precision positioned depends primarily on lock in time error.Based on synchronization
The importance of collection, the present invention proposes a kind of power cable partial discharge synchronous collection method based on GPS.
The content of the invention
In view of this, it is an object of the invention to provide a kind of power cable partial discharge synchronous collection method based on GPS, it can drop
Low cable two ends time synchronized is poor, improves positioning precision, so as to it is accurate, be quickly found out cable discharge source；The present invention is also provided
A kind of power cable partial discharge synchronous based on GPS.
An object of the present invention is achieved through the following technical solutions：
A kind of power cable partial discharge synchronous collection method based on GPS, comprises the following steps：
1a. principals and subordinates collector initializes the serial ports parameter being connected with GPS module respectively；
1b. principals and subordinates collector receives string data from GPS module respectively using serial ports circulation, under being performed after receiving
One step, failure and 1a is performed when GPS schools are recorded if the several seconds does not receive data；
1c. principals and subordinates collector is verified to the data parsed in 1b successively, is proofreaded when qualified using the UTC time of parsing
The collector systems time, if the unqualified execution step 1b of fruit；
Failure when the main collectors of 2a. detect whether to have GPS schools, if there is no then performing next step；Otherwise wait for number
Current procedures are continued executing with after second；
The main collectors of 2b. send internet message to from collector, and both sides' agreement acquisition time is recorded if failure is sent
Communication failure, continues executing with 2a after waiting the several seconds, the response message from collector is otherwise received, if be not received by the several seconds
Correct response performs 2a after then waiting the several seconds, otherwise continues executing with next step；
2c. main collector detecting system times and acquisition time, next step is performed if equal, some millis are otherwise waited for
Current procedures are continued executing with after second；
The main collectors of 2d. send I/O signal to main acquisition module, and main acquisition module is after I/O signal is received, detection master
The PPS signal of GPS module, the triggering collection when detecting next PPS rising edges, gatherer process continues several milliseconds, gathered
Into rear execution next step；
The main collectors of 2e. send internet message to from collector, the data gathered from collector are asked, if asked successfully
Next step is then carried out, otherwise waits for performing 2a after the several seconds；
The data that 2f. is gathered to principal and subordinate are matched and positioned, and 2a is continued executing with after the completion of positioning；
The collection of 3a. from the main collector of collector circular wait is asked and detected, is then responded successfully when correct and is continued to hold
Row next step, otherwise continues executing with current procedures；
3b. performs next step from collector detecting system time and acquisition time if equal, otherwise waits for some millis
Current procedures are continued executing with after second；
3c. from collector send I/O signal to from acquisition module, from acquisition module after I/O signal is received, detection from
The PPS signal of GPS module, the triggering collection when detecting next PPS rising edges, gatherer process continues several milliseconds, gathered
Into rear execution next step；
3d. waits main collector request gathered data from collector, by the data currently collected after request is received
Net is transmitted to main collector, and 3a is continued executing with after being sent.
Further, serial ports parameter includes baud rate, check bit, data bit and stop position in the step 1a.
Further, it is that state value is no-fix or calculated, when used in prelocalization to be verified in the step 1c unqualified
Number of satellite be less than for the four, date of parsing and the current UTC time for not meeting and/or parse be less than or equal to the last time when
Between be worth.
Further, the acquisition time in the step 2b is to increase the delay of several seconds on the basis of present system time
Time.
Further, detection collection request is failure when detecting whether to have GPS schools in the step 3a, if there is then
Response failure, then whether verification acquisition time is legal, and failure is responded if acquisition time is less than or equal to its temporal.
The second object of the present invention is achieved through the following technical solutions：
A kind of system for realizing the above-mentioned power cable partial discharge synchronous collection method based on GPS, including main collector, from adopting
Storage, main acquisition module, from acquisition module, main GPS and from GPS；
The main collector, the two ends for being connected to from collector power cable to be detected, the main collector lead to
Communication module is crossed with from collector to be connected；
The master and slave GPS receives the signal from satellite, and automatic compensating signal is between satellite and receiver
Transmission delay, output keeps the pps pulse per second signal PPS of high level of synchronization to master and slave acquisition module with UTC time；
Described master and slave GPS exports the string data corresponding with PPS pulse signals forward position by serial port
To principal and subordinate's collector；
The master and slave acquisition module is connected by interface with master and slave collector.
The beneficial effects of the invention are as follows：
A kind of power cable partial discharge synchronous collection method based on GPS of the present invention, electricity is realized by using gps clock
Cable two ends time synchronized Du Genggao, positioning precision is more accurate, so as to be quickly found out cable discharge source, improves power supply quality；This
The power cable partial discharge synchronous based on GPS of invention, simple in construction, easy for installation, cost is low.
Other advantages, target and the feature of the present invention will be illustrated in the following description to a certain extent, and
And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke
To be instructed from the practice of the present invention.The target and other advantages of the present invention can be wanted by following specification and right
Book is sought to realize and obtain.
Brief description of the drawings
In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with accompanying drawing the present invention is made into
The detailed description of one step, wherein：
Fig. 1 is the power cable partial discharge synchronous structural representation of the invention based on GPS；
Flow chart when Fig. 2 is synchronous couple of GPS in the power cable partial discharge synchronous collection method based on GPS；
Fig. 3 is the main collector collecting flowchart figure in the power cable partial discharge synchronous collection method based on GPS；
Fig. 4 is from collector collecting flowchart figure in the power cable partial discharge synchronous collection method based on GPS.
Embodiment
Hereinafter with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail.It should be appreciated that preferred embodiment
Only for the explanation present invention, the protection domain being not intended to be limiting of the invention.
GPS (Global Positioning System, global positioning system) is the seventies in last century by U.S. land, sea and air
The radio-navigation positioning system based on satellite of tri-service development, can provide the user three-dimensional coordinate, the speed of precision
Degree and time, it is widely used in the fields such as navigator fix, mapping positioning, fine timing and time synchronized, the present invention is mainly profit
Cabling power both-end synchronous acquisition is realized with gps clock, as shown in figure 1, the power cable partial discharge based on GPS of the present invention is synchronous
Acquisition system, including main collector, from collector, main acquisition module, from acquisition module, main GPS and from GPS receiver
Machine；
Main collector, the two ends for being connected to from collector power cable to be detected, main collector pass through the mould that communicates
Block is connected with from collector；Communication module can be optical fiber, twisted-pair feeder, even WIFI, 3G/4G
Master and slave GPS receives the signal from satellite, and biography of the automatic compensating signal between satellite and receiver
Defeated delay, output keeps the pps pulse per second signal PPS of high level of synchronization to master and slave acquisition module with UTC time；
Master and slave GPS exports the string data corresponding with PPS pulse signals forward position to principal and subordinate by serial port
Collector；
Master and slave acquisition module is connected by I/O interfaces with master and slave collector.
String data is the information such as time, date, state, satellite number, the check code of positioning, and wherein state includes uncertain
Position, positioning, just in the calculation, the satellite number of positioning, which is typically larger than, to be equal to more than four and just calculates reliably；
In the present embodiment, 1, collector using the APD120 that voluntarily researches and develops, it use the am3517 of Texas Instrument's offer for
Main control chip, acquisition module use the FPGA that A Ertela is provided, and its concrete model is EP4CE55F23I7N；
2nd, collector systems are Embedded Linux 3.2.0；
3rd, GPS module uses third party manufacturer finished product, and its concrete configuration is baud rate：115200, data are：8, odd even
Check bit：Nothing, stop position：1, SOD serial output data form is $ GPGGA and $ GPRMC, serial data output time at intervals of 1
Second；
4th, communicated between principal and subordinate's collector using 4G, 4G communication modules purchase third-party finished product.
A kind of power cable partial discharge synchronous collection method based on GPS of the present invention, comprises the following steps：
As shown in Fig. 2 1a, principal and subordinate's collector just initialize the serial ports parameter being connected with GPS module, including baud respectively
Rate：115200th, base even parity bit：Nothing, data bit：8, stop position：1, receive time-out time 1 second；
The read functions that 1b, principal and subordinate's collector are carried using system circulate reception data from serial ports, when having received $
Next step is performed after GPGGA and $ GPRMC packets, otherwise continues to read, if (being set as 5 in the present embodiment in the stipulated time
Second, naturally it is also possible to other times were set, such as 3-8 second) do not receive complete packet if failure, wait 1 when recording GPS schools
1a is re-executed after second (can also be arranged as required to as other times, such as 0.5 second)；
1c, principal and subordinate's collector are verified to the data parsed in 1b successively, if state value is no-fix or counted
Calculation then perform 1d, if when the number of satellite used in prelocalization be less than four fundamental rules perform 1d, if parsing date and be not inconsistent currently
Conjunction then performs 1d, and 1d is returned if the UTC time of parsing is less than or equal to last time value；Otherwise parsing is utilized
UTC time proofreads the collector systems time, and error counter is reset.
1d, by error counter increase by 1, if error counter be less than five return 1b perform, otherwise return 1a perform.
As shown in figure 3, failure when 2a, main collector detect whether to have GPS schools, if there is no then performing next step；
Otherwise wait for continuing executing with current procedures after (can also be arranged as required to as other times, such as 0.5 second) in 1 second；
2b, main collector send internet message to from collector, and both sides arrange acquisition time.Acquisition time is to be currently
Increase delay time in the delay time of several seconds, the present embodiment on the basis of the system time to be set to (to set as needed for 8 seconds
It is set to other times, such as 6-12 seconds), recorded if failure is sent and communication failure and re-execute 2a, otherwise waited for from adopting
The response message of storage, if in 5 seconds (being set as 5 seconds in the present embodiment, naturally it is also possible to set other times, such as 3-8 seconds)
Being not received by correct response then waits 1 second (can also be arranged as required to as other times, such as 0.5 second) to perform afterwards
2a, otherwise performs next step；
2c, main collector comparison system time and agreement acquisition time, next step is performed if equal, is otherwise waited for
Current procedures are continued executing with after 100 milliseconds (can also be arranged as required to as other times, such as 80-200 milliseconds)；
2d, main collector send I/O signal and give acquisition module (FPGA), and FPGA detects GPS moulds after I/O signal is received
The PPS signal of block, the triggering collection when detecting next PPS rising edges, gatherer process continues 20 milliseconds (can also be according to need
It is set to other times, such as 10-30 milliseconds), perform next step after the completion of collection
2e, main collector send internet message to from collector, the data gathered from collector are asked, if asked successfully
Next step is then carried out, 1 second (can also be arranged as required to as other times, such as 0.5-2 seconds) is otherwise waited for and performs 2a afterwards；
2f, the data to principal and subordinate's collection are matched and positioned, and 2a is re-executed after the completion of positioning.
As shown in figure 4,3a, the recv function loops carried from collector using system wait the collection of main collector please
Ask, come if received after the collection request of autonomous collector, failure when itself whether there is GPS schools is detected first, if
In the presence of failed message is then responded, whether the acquisition time for then verifying agreement is legal, if agreement acquisition time is less than or equal to
Its temporal then responds failed message.Success message is responded if detection is without mistake and continues executing with next step；Otherwise after
The continuous current procedures that perform wait new collection request；
3b, from collector detecting system time and acquisition time, next step is performed if equal, otherwise wait for 100 milli
Current procedures are continued executing with after second (can also be arranged as required to as other times, such as 80-150 milliseconds)；
3c, from collector send I/O signal give acquisition module (FPGA), FPGA after I/O signal is received, detect GPS moulds
The PPS signal of block, the triggering collection when detecting next PPS rising edges, gatherer process continues 20 milliseconds (can also be according to need
It is set to other times, such as 10-30 milliseconds), perform next step after the completion of collection；
3d, main collector request gathered data is waited from collector, by the data currently collected after request is received
Net is transmitted to main collector, and 3a is continued executing with after being sent.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
The present invention is described in detail good embodiment, it will be understood by those within the art that, can be to skill of the invention
Art scheme is modified or equivalent substitution, and without departing from the objective and scope of the technical program, it all should cover in the present invention
Right among.
Claims (6)
1. a kind of power cable partial discharge synchronous collection method based on GPS, it is characterised in that：Comprise the following steps：
1a. principals and subordinates collector initializes the serial ports parameter being connected with GPS module respectively；
1b. principals and subordinates collector receives string data from GPS module respectively using serial ports circulation, is performed after receiving next
Step, failure and 1a is performed when GPS schools are recorded if the several seconds does not receive data；
1c. principals and subordinates collector is verified to the data parsed in 1b successively, is proofreaded and gathered using the UTC time of parsing when qualified
Device system time, if the unqualified execution step 1b of fruit；
Failure when the main collectors of 2a. detect whether to have GPS schools, if there is no then performing next step；Otherwise wait for after the several seconds
Continue executing with current procedures；
The main collectors of 2b. send internet message to from collector, and both sides' agreement acquisition time records communication if failure is sent
Failure, continues executing with 2a after waiting the several seconds, otherwise receives the response message from collector, if be not received by the several seconds correct
Response then wait 2a performed after the several seconds, otherwise continue executing with next step；
2c. main collector detecting system times and acquisition time, next step is performed if equal, is otherwise waited for after some milliseconds
Continue executing with current procedures；
The main collectors of 2d. send I/O signal to main acquisition module, and main acquisition module detects main GPS moulds after I/O signal is received
The PPS signal of block, the triggering collection when detecting next PPS rising edges, gatherer process continues several milliseconds, held after the completion of collection
Row next step；
The main collectors of 2e. send internet message to from collector, ask the data gathered from collector, enter if asking successfully
Row next step, otherwise waits for performing 2a after the several seconds；
The data that 2f. is gathered to principal and subordinate are matched and positioned, and 2a is continued executing with after the completion of positioning；
The collection of 3a. from the main collector of collector circular wait is asked and detected, is then responded successfully and is continued executing with down when correct
One step, otherwise continues executing with current procedures；
3b. performs next step from collector detecting system time and acquisition time if equal, otherwise waits for after some milliseconds
Continue executing with current procedures；
3c. sends I/O signal to from acquisition module from collector, from acquisition module after I/O signal is received, and detects from GPS moulds
The PPS signal of block, the triggering collection when detecting next PPS rising edges, gatherer process continues several milliseconds, held after the completion of collection
Row next step；
3d. waits main collector request gathered data from collector, passes the data network currently collected after request is received
To main collector, 3a is continued executing with after being sent.
2. a kind of power cable partial discharge synchronous collection method based on GPS according to claim 1, it is characterised in that：Institute
Stating serial ports parameter in step 1a includes baud rate, check bit, data bit and stop position.
3. a kind of power cable partial discharge synchronous collection method based on GPS according to claim 1 or 2, it is characterised in that：
It is that state value is no-fix or calculated, when the number of satellite used in prelocalization is less than to be verified in the step 1c unqualified
4th, the date of parsing and the current UTC time for not meeting and/or parsing are less than or equal to last time value.
4. a kind of power cable partial discharge synchronous collection method based on GPS according to claim 3, it is characterised in that：Institute
The acquisition time in step 2b is stated to increase the delay time of several seconds on the basis of present system time.
5. a kind of power cable partial discharge synchronous collection method based on GPS according to claim 4, it is characterised in that：Institute
It is failure when detecting whether to have GPS schools to state detection collection request in step 3a, is failed if there is then response, then verification is adopted
Whether the collection time is legal, and failure is responded if acquisition time is less than or equal to its temporal.
6. a kind of system for realizing any power cable partial discharge synchronous collection methods based on GPS of claim 1-5, it is special
Levy and be：Including main collector, from collector, main acquisition module, from acquisition module, main GPS and from GPS；
The main collector, the two ends for being connected to from collector power cable to be detected, the main collector passes through logical
Letter module is connected with from collector；
The master and slave GPS receives the signal from satellite, and biography of the automatic compensating signal between satellite and receiver
Defeated delay, output keeps the pps pulse per second signal PPS of high level of synchronization to master and slave acquisition module with UTC time；
Described master and slave GPS exports the string data corresponding with PPS pulse signals forward position to master by serial port
From collector；
The master and slave acquisition module is connected by interface with master and slave collector.
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| CN201710404006.9A CN107167712A (en) | 2017-06-01 | 2017-06-01 | A kind of power cable partial discharge synchronous collection method and system based on GPS |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118672350A (en) * | 2024-06-17 | 2024-09-20 | 河南翔宇医疗设备股份有限公司 | Method, device and equipment for synchronously collecting data and readable storage medium |
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| CN118672350A (en) * | 2024-06-17 | 2024-09-20 | 河南翔宇医疗设备股份有限公司 | Method, device and equipment for synchronously collecting data and readable storage medium |
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