CN106707156A - On-line wave recording method and device for circuit breaker opening-closing coil - Google Patents
On-line wave recording method and device for circuit breaker opening-closing coil Download PDFInfo
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- CN106707156A CN106707156A CN201611255767.4A CN201611255767A CN106707156A CN 106707156 A CN106707156 A CN 106707156A CN 201611255767 A CN201611255767 A CN 201611255767A CN 106707156 A CN106707156 A CN 106707156A
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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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
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Abstract
The invention discloses an on-line wave recording method for a circuit breaker opening-closing coil and a device for realizing the method. The wave recording method comprises: a controller obtains a current signal from a sampling chip, carries out wave recording continuously and stores the recorded signal into an RAM, wherein an initial recording state is a false state; in a false state of the recording state, when the current signal is larger than a first threshold value, an address of recording data at the RAM is an ID1, and the recording state is changed to be a true state; in the true state, when the current signal is smaller than the first threshold value, an address of recording data at the RAM is an ID2, the recording state is changed to be a false state, and the controller sends an interruption signal to a processor; the recording data are recorded, wherein the initial address is ID1-T and the data length is ID2-ID1+2T and the T is a second threshold value; and after the processor receives the interruption signal, the recording data are taken from the RAM. Therefore, integrity of the current recording waveform of the opening or closing coil can be ensured and accuracy of follow-up data mining analysis can be guaranteed. Meanwhile, closing or closing actions are determined and distinguished automatically, so that no external signal circuit is needed.
Description
Technical field
The present invention relates to breaker monitoring technical field, specifically related to a kind of online Wave record method of circuit-breaker switching on-off coil
And device, can efficiently record ripple.
Background technology
Separating brake or closing coil (separating brake or closing coil) are that electric power system control, the final of protective loop perform unit
Part, is again one of critical elements in primary cut-out electromagnetic operating mechanism.When power system is out of order, breaker receives relay
Protection and automatics point/close a floodgate order, with the speed of Millisecond go perform point/feed motion, with avoid accident spread and
Expand.The size of separating brake or closing coil electric current, the length of duration reflect the good of primary cut-out mechanical operating mechanism
It is bad, embody the quality of the mechanical property of primary cut-out.The change of operating mechanism performance, in the separating brake or closing line of breaker
Directly embodied in loop current.Because the resistance of different primary cut-out separating brake or closing coil and reactance are different from,
Correspondingly, the curent change of separating brake or closing coil is also differed, so as to the collection to current waveform brings uncertain factor.
The breaker open operation or closing coil current recording of prior art are processed using single-chip microcomputer mostly, such as Fig. 4 institutes
Show, separating brake or closing coil (switching winding or closing coil) electric current are obtained with Hall sensor first, by signal condition
Modulus conversion chip (ADC in Fig. 4) is delivered to after circuit carries out analog-to-digital conversion, and the sampling rate of modulus conversion chip and conversion are logical
Road selection is all controlled by single-chip microcomputer, and modulus conversion chip all notifies that monolithic is machine-readable after often completing 1 conversion with interrupt signal
Access evidence.Single-chip microcomputer also needs to gather switching signal and sub-gate signal simultaneously, determines the information that the disconnected Jian of breaker is still closed, with
Judge that current gathered data is switching current or separating brake electric current.Data after treatment are passed through LCD (liquid crystals by last single-chip microcomputer
Display screen) it is shown, also data exchange can be carried out by communication interface and outside.
Single-chip microcomputer finally obtains breaker open operation or closing coil current waveform as shown in Figure 5, wherein, Ts is breaker
Point/switching current initial time, Te is finish time.Ideally the electric current corresponding to Ts the and Te moment all should be " 0 ", but
Due to the presence of noise, as illustrated, actual current is not " 0 ", in 1A or so.To determine that breaker point/close a floodgate starting and knot
The beam moment, it usually needs one threshold value M of setting (M can be 1A according to being actually determined, such as, 1.5A etc.) has judged
Time beginning or end time, breaker open operation or the starting of closing coil electric current are then judged as when gathered data exceedes threshold value M
At the moment, be then finish time during less than setting value.
There is following defect in above-mentioned prior art：(1) due to the difference of circuit breaker operation mechanism, separating brake or closing coil are logical
Overcurrent and actuation time are also different.Different threshold value M can correspond to different time points, therefore different threshold value M
Setting can produce point/initial time that closes a floodgate different and finish time.This will cause the enrolled waveform to have missing, it is impossible to
Complete reflection breaker point/feed motion process.That is, the integrality of current waveform is subject to threshold value M or breaker poor
Different influence.
(2), in 5KHz or so, modulus conversion chip sends interruption with this frequency for separating brake or closing coil current recording frequency,
5000 times per second, single-chip microcomputer consumes most of resource for response is interrupted, while also to complete the logical of data in a short time
Letter and display, consume most of resource of single-chip microcomputer, it is impossible to realize the analysis mining of data.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of primary cut-out separating brake or the online Wave record method of closing coil,
The complete procedure of coil current change, does not lose, does not lack each action data when can record faithfully breaker point/combined floodgate, presses
Breaker open operation or closing coil current recording do not receive breaker differentia influence.
To achieve the above object, the present invention is adopted the following technical scheme that：A kind of circuit-breaker switching on-off coil records ripple side online
Method, comprises the following steps：
Step 1：Controller obtains current signal from sampling A/D chip, persistently records ripple and is stored in RAM, initially records wavy
State is false；
Step 2：Record in the state of wavy state is vacation, when current signal is more than first threshold, record start moment t1, this
When recorder data be ID1 in the address of RAM, the change wavy state of record is true；
Step 3：Record in the state of wavy state is true, when current signal is less than first threshold, record end moment t2, this
When recorder data be ID2 in the address of RAM, the change wavy state of record is false, and controller sends an interrupt signal to processor；
Step 4：Record recorder data, wherein initial address are ID1-T, and data length is ID2-ID1+2T, and wherein T is the
Two threshold values；
Step 5：After processor receives interrupt signal, the data from RAM in acquisition step 4.
Preferably, the controller is field programmable gate array.
The present invention additionally provides the online wave recording device for realizing above-mentioned Wave record method simultaneously, including：It is arranged at separating brake or conjunction
Hall sensor on lock wire loop；The signal conditioning circuit of connection Hall sensor and digital-to-analogue conversion sampling A/D chip；Control
Device, the sampling of controller control digital-to-analogue conversion sampling A/D chip simultaneously carries out record ripple and is stored in the RAM of controller, in record ripple knot
Shu Houxiang processors send interrupt signal；Processor, the processor obtains recorder data according to interrupt signal from RAM.
Specifically, the controller is, field programmable gate array, including：Digital-to-analogue chip interface, record ripple control unit,
Two-port RAM and processor interface；The digital-to-analogue chip interface is used to connect digital-to-analogue conversion sampling A/D chip, the processor interface
For connecting processor；The record ripple control unit controls the sampling of digital-to-analogue conversion sampling A/D chip by digital-to-analogue chip interface, and
Recorder data is obtained from digital-to-analogue conversion sampling A/D chip；Recorder data is write the two-port RAM by the record ripple control unit,
And terminate to send terminal signaling to processor interface in record ripple.
Online Wave record method of the invention and device, efficient waveform record ripple logic control mechanisms, it is ensured that separating brake or combined floodgate
Coil current records the complete of waveform, it is ensured that the accuracy of follow-up data mining analysis, while distinguishing separating brake or conjunction from judging to move
Lock is acted, it is not necessary to external separating brake or switching signal circuit.Additionally, on-line automatic collection breaker open operation or closing coil electric current
Waveform, makes processor be freed from acquisition control and data record ripple, is absorbed in data communication and separating brake or closing line round
State is analyzed, and improves system effectiveness.
Brief description of the drawings
In order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art, below will be to specific
The accompanying drawing to be used needed for implementation method or description of the prior art is briefly described.
Fig. 1 is the schematic flow sheet of the online Wave record method of one embodiment of the present of invention；
Fig. 2 is the structured flowchart in wave recording device of one embodiment of the present of invention；
Fig. 3 is the internal structure block diagram of the controller in Fig. 2；
Fig. 4 is the structured flowchart of the wave recording device of prior art；
Fig. 5 is the oscillogram obtained using the wave recording device of Fig. 4.
Specific embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation
Example is a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In the specification and claim of this patent, separating brake or closing coil refer to " switching winding or closing line
Circle ".FPGA is the abbreviation of English Field-Programmable Gate Array, i.e. field programmable gate array, it be
The product further developed on the basis of programming device.It is as a kind of semidefinite in application specific integrated circuit (ASIC) field
Circuit processed and occur, both solved the deficiency of custom circuit, overcome again original programming device gate circuit number it is limited lack
Point.In embodiments of the invention, take FPGA as controller, perform control function.
Additionally, in the specification and claims of this patent, threshold value A is determined as follows with threshold value T：
Threshold value A is used to avoid the noise in circuit, therefore is greater than noise amplitude, while requiring starting current during less than coil motion
Peak value, generally 0.1A or so；Time threshold T is generally 5ms or so, for obtaining more data outside effectively record ripple wave mode,
This two threshold values can be according to being finely adjusted on the basis of actual conditions again above-mentioned numerical value.
Fig. 1 is the breaker open operation of one embodiment of the present of invention or the FPGA record ripple logic control flow process figures of combined floodgate, is divided
Lock and combined floodgate have identical control flow, and this control flow runs in FPGA, and processor (CPU) is according to interrupt signal, area
It is separating brake Wave data or combined floodgate Wave data to divide, and is judged without external divide-shut brake letter.Fig. 2 records ripple to realize this
The schematic diagram of the device of method, Fig. 3 is the internal structure block diagram of the controller in Fig. 2.
In Fig. 1, Flag represents the wavy state of record, and ' 0 ' interval scale has breaker without breaker point/feed motion electric current when ' 1 '
Point/feed motion electric current.(1 represents logic state "true", and 0 represents logic state "false") Cnt represents delay duration (i.e. from record ripple
Data are used to help judge whether record fluctuation completes less than the duration after threshold value A).It is double due to being online record ripple in real time
Mouth RAM (random access memory, random access memory) circulation preserves data, old with new data cover after being filled with
Data, data ID indicates position of the current data in dual port RAM, namely address.ID1 is number when there is action current
According to position, ID2 is the Data Position at the end of action current.Threshold value A is used to determine whether breaker open operation or closes a floodgate dynamic
Make, when gathered data is more than this value and Flag=0, illustrate action current occur, time point now is recorded as t1, number now
It is ID1 according to address；When gathered data is less than threshold value A and Flag=1, illustrate that action current terminates, time point now is recorded as
T2, data address is ID2.ID1 and ID2 determines the address of recorder data.Record ripple caused by the presence due to threshold value A to eliminate
Data are imperfect, in the present embodiment, after the time point terminated with electric current before judging the time point for electric current occur by threshold value A
Increase the data of certain hour length respectively, this length is threshold value T, so as to prevent the presence because of threshold value A from causing waveform to lack, is made
There is mistake in analysis.Therefore recorder data actual address is Addr=ID1-T and data physical length Len=ID2+T- (ID1-
T)=ID2-ID1+2T.Complete recorder data is obtained by setting up threshold value T.The presence of threshold value T, it is ensured that even if being applied to not
Same circuit breaker operation mechanism and different threshold value As, can ensure to obtain complete recorder data.It is pointed out that by
It is exactly the waveform that electric current is changed over time in Wave data, therefore its storage address ID1 has corresponding relation with the corresponding moment, can
It is used as ID addresses with using the time.The initial address of Wave data can be thus represented with ID1-T.
Below in conjunction with the flow chart of Fig. 1, the detailed operation of the method for sampling of the present embodiment is illustrated：
As shown in figure 1, when starting, in step sl, wave recording device is in idle condition, wherein, Flag=0, Cnt=0；
Step S2：During gathered data, in the data storage RAM for being gathered, data ID is incremental, and (new ID represents new
Data, distinguish existing data), subsequently into step S3：
Step S3：Judge whether Flag=1 is true, if NO, illustrate not carrying out record ripple, go to step S5, this feelings
Condition is corresponding when being incipient, and the data (current value) for being gathered are less than threshold value A, are also introduced into recording wavy state；If
Flag=1 is true, shows to enter record unduloid, then into step S4；
Step S5：Compare the data of collection and the size of threshold value A, when the data of collection are also not less than threshold value A, continue to return
Step S2. is returned, in gathered data but the state of ripple is not recorded；When the data of collection>During threshold value A, into step S7；
Step S7：The wavy state of record is initially entered, the value of Flag is changed to 1, return to step S2, start gathered data；
Step S4：Judge the relation of data and threshold value A, if data are set up less than threshold value A, be prepared to enter into stopping record ripple
State, then record data ID2 now be transferred to step S42：Enter line delay record ripple, threshold value T is less than in delay duration Cnt
When, return to step S2 keeps the shape body of gathered data, when delay duration Cnt is more than threshold value T, then real to stop record ripple, turns
Enter step S43, record data ID2, this is the storage address when data drop to threshold value A, is then transferred to step S44；
Step S44：Recorder data is obtained, recorder data actual address is Addr=ID1-T and data physical length Len=
ID2+T- (ID1-T)=ID2-ID1+2T, ID2+T include time delay T, and ID1-T represents that its initial address has pushed away forward T, complete
Into after data acquisition, step S45 is carried out：Controller sends interrupt signal to processor, and processor is recorded according to interrupt signal
Wave number evidence, according to above-mentioned recorder data actual address Addr=ID1-T and length ID2-ID1 when processor acquisition data
+ 2T obtains data from RAM.
As shown in figure 1, after completing step S44, obtaining recorder data, controller (FPGA) sends interruption letter to processor
Number, processor, according to interrupting information and address (Addr) and length (Len) data, reads separating brake or combined floodgate from two-port RAM
Current waveform data,
Fig. 2 is the primary cut-out separating brake or the online wave recording device of closing coil of one embodiment of the present of invention.This is online
Wave recording device is included as the controller (field programmable gate array, FPGA) of core；It is arranged at separating brake or closing coil loop
On Hall sensor；The signal conditioning circuit of connection Hall sensor and digital-to-analogue conversion sampling A/D chip (ADC samplings)；The control
The sampling of device control digital-to-analogue conversion sampling A/D chip processed simultaneously carries out record ripple, is stored in the RAM of field programmable gate array, in record ripple
Terminate backward processor and send interrupt signal；Processor, the processor obtains recorder data according to interrupt signal from RAM.
As shown in figure 3, data acquisition is completed by FPGA, multichannel modulus conversion chip synchronous sampling control, breaker
Separating brake or feed motion judge, data record ripple is all automatically performed by FPGA.So, processor is (at single-chip microcomputer, DSP data signals
Reason device or other processors) can just be freed from acquisition control and data record ripple, specially cause in data communication and separating brake or
Closing coil state analysis.
Fig. 3 is controller built-in function block diagram, and under the control of record wave-path sequence, FPGA will be from ADC (digital-to-analogue conversion sampling cores
Piece) interface Real-time Collection datacycle storage in internal two-port RAM, FPGA often completes separating brake/combined floodgates and records ripple just
The recorder data of designated length is read from the specified address of two-port RAM with interrupt signal notifier processes device CPU.
In the present embodiment, whole record wave process is all automatically performed by FPGA, without the intervention for needing processor.Make processor
Freed from numerous and diverse acquisition control and data record ripple, be absorbed in data communication and separating brake or closing coil state analysis,
Improve system effectiveness.
Incorporated by reference to Fig. 3, in the present embodiment, the controller be field programmable gate array, including digital-to-analogue chip interface, record
Ripple control unit (this program is operationally waited and is read execution), two-port RAM and processor interface；The digital-to-analogue chip interface
For connecting digital-to-analogue conversion sampling A/D chip, the processor interface is used to connect processor；The record ripple control unit is by number
The sampling of core rod piece Interface Controller digital-to-analogue conversion sampling A/D chip, and obtain recorder data from digital-to-analogue conversion sampling A/D chip；It is described
Recorder data is write the two-port RAM by record ripple control unit, and terminates to send terminal signaling to processor interface in record ripple.
Additionally, as shown in Fig. 2 in the present embodiment, processor is also associated with communication interface, connecting with extraneous storage device
Connect, or connection LCD display, the waveform of the ripple of display record in real time.
Compared with prior art, the Wave record method and device of the present embodiment, by setting threshold value T, remains judgement and occurs
Before electric current and judge electric current terminate after certain length data, prevent because of the difference of the different and threshold value A of breaker mechanism
Cause waveform to lack, and then analysis is likely to occur mistake.The Wave data for namely taking the present embodiment to obtain is more complete,
Especially the electric current incipient stage is more complete with the data of ending phase, is carved and finish time at the beginning of more just solving really.
Additionally, can be seen that processor with reference to above-mentioned flow is to indicate the differentiation to be separating brake or close a floodgate dynamic according to interrupting
Make current waveform, auxiliary judgment is carried out without special external divide-shut brake signal, also just eliminate access separating brake and switching signal circuit.
In addition it should be pointed out that, Fig. 2 and Fig. 3 is to illustrate to realize one kind of the method for sampling of the invention with demonstrating
Device, may also take on realize separating brake or closing coil electric current real-time data acquisition by FPGA in practice；Subsequent action electric current rises
Only the moment judges and waveform integrality is then realized in high performance processor using program code.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (4)
1. a kind of online Wave record method of circuit-breaker switching on-off coil, it is characterised in that comprise the following steps：
Step 1：Controller obtains current signal from sampling A/D chip, persistently records ripple and is stored in RAM, and initially recording wavy state is
It is false；
Step 2：Record in the state of wavy state is vacation, when current signal is more than first threshold, record start moment t1 is now recorded
Wave number is ID1 according in the address of RAM, and the wavy state of change record is true；
Step 3：Record in the state of wavy state is true, when current signal is less than first threshold, record end moment t2 is now recorded
Wave number is ID2 according in the address of RAM, and the wavy state of change record is false, and controller sends an interrupt signal to processor；
Step 4：Record recorder data, its initial address is ID1-T, and data length is ID2-ID1+2T, and wherein T is the second threshold
Value；
Step 5：After processor receives interrupt signal, the data from RAM in acquisition step 4.
2. the online Wave record method of circuit-breaker switching on-off coil as claimed in claim 1, it is characterised in that the controller is existing
Field programmable gate array.
3. a kind of breaker open operation or the online wave recording device of closing coil, it is characterised in that including：
It is arranged at the Hall sensor on separating brake or closing coil loop；
The signal conditioning circuit of connection Hall sensor and digital-to-analogue conversion sampling A/D chip；
Controller, the sampling of controller control digital-to-analogue conversion sampling A/D chip simultaneously carries out record ripple and is stored in the controller
In RAM, interrupt signal is sent to processor after record ripple terminates；
Processor, the processor obtains recorder data according to interrupt signal from RAM.
4. breaker open operation as claimed in claim 3 or the online wave recording device of closing coil, it is characterised in that the controller
It is field programmable gate array, including digital-to-analogue chip interface, record ripple control unit, two-port RAM and processor interface；
The digital-to-analogue chip interface is used to connect digital-to-analogue conversion sampling A/D chip, and the processor interface is used to connect processor；
The record ripple control unit controls the sampling of digital-to-analogue conversion sampling A/D chip by digital-to-analogue chip interface, and is adopted from digital-to-analogue conversion
Recorder data is obtained in sample chip；
Recorder data is write the two-port RAM by the record ripple control unit, and terminates to be sent to processor interface in record ripple
Terminal signaling.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611255767.4A CN106707156A (en) | 2016-12-30 | 2016-12-30 | On-line wave recording method and device for circuit breaker opening-closing coil |
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| CN201611255767.4A CN106707156A (en) | 2016-12-30 | 2016-12-30 | On-line wave recording method and device for circuit breaker opening-closing coil |
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| CN201611255767.4A Pending CN106707156A (en) | 2016-12-30 | 2016-12-30 | On-line wave recording method and device for circuit breaker opening-closing coil |
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| CN107390119A (en) * | 2017-07-06 | 2017-11-24 | 国网新疆电力公司电力科学研究院 | The online recording monitoring device of circuit-breaker switching on-off coil and application method |
| CN110530566A (en) * | 2019-10-10 | 2019-12-03 | 国网河南省电力公司电力科学研究院 | A kind of breaker switching on and off spring pressure monitoring system and detection method |
| CN111896788A (en) * | 2020-08-07 | 2020-11-06 | 西安远测电力科技有限公司 | Trigger method for current recording of opening and closing coil of circuit breaker |
| CN112631987A (en) * | 2020-12-24 | 2021-04-09 | 合肥埃科光电科技有限公司 | FPGA target waveform grabbing method and device |
| CN112867931A (en) * | 2018-10-19 | 2021-05-28 | 泰瑞达公司 | Automatic test equipment with relay thermal switch detection function |
| CN113376515A (en) * | 2020-03-09 | 2021-09-10 | 西门子股份公司 | Method and device for determining closing time of circuit breaker and computer readable medium |
| CN113419166A (en) * | 2021-06-30 | 2021-09-21 | 中关村芯海择优科技有限公司 | Relay state detection system and method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107390119A (en) * | 2017-07-06 | 2017-11-24 | 国网新疆电力公司电力科学研究院 | The online recording monitoring device of circuit-breaker switching on-off coil and application method |
| CN112867931A (en) * | 2018-10-19 | 2021-05-28 | 泰瑞达公司 | Automatic test equipment with relay thermal switch detection function |
| CN110530566A (en) * | 2019-10-10 | 2019-12-03 | 国网河南省电力公司电力科学研究院 | A kind of breaker switching on and off spring pressure monitoring system and detection method |
| CN113376515A (en) * | 2020-03-09 | 2021-09-10 | 西门子股份公司 | Method and device for determining closing time of circuit breaker and computer readable medium |
| CN111896788A (en) * | 2020-08-07 | 2020-11-06 | 西安远测电力科技有限公司 | Trigger method for current recording of opening and closing coil of circuit breaker |
| CN112631987A (en) * | 2020-12-24 | 2021-04-09 | 合肥埃科光电科技有限公司 | FPGA target waveform grabbing method and device |
| CN113419166A (en) * | 2021-06-30 | 2021-09-21 | 中关村芯海择优科技有限公司 | Relay state detection system and method |
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Application publication date: 20170524 |