CN105676160A - Electronic transformer calibrator traceability method and system - Google Patents
Electronic transformer calibrator traceability method and system Download PDFInfo
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- CN105676160A CN105676160A CN201610059120.8A CN201610059120A CN105676160A CN 105676160 A CN105676160 A CN 105676160A CN 201610059120 A CN201610059120 A CN 201610059120A CN 105676160 A CN105676160 A CN 105676160A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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Abstract
The invention provides an electronic transformer calibrator traceability method and system. The method comprises the following steps: a digital multimeter collects analog signals and converts the analog signals into a digital message; an upper computer carries out virtual reconstruction on the digital messages and then carries out error information superposition to form a reconstructed message; a message controller carries out timing control according to the reconstructed message; a tested electronic transformer calibrator collects the analog signals and the reconstructed message sent by the message controller and generates error information; and a comparison is made between the error information generated by the tested electronic transformer calibrator and the error information superposed by the upper computer to obtain test errors. The sample data of the digital multimeter is subjected to virtual reconstruction to enable the output digital message to be same with the message output by an actual electronic transformer merging unit, and by comparing the error information generated by the tested electronic transformer calibrator and the error information superposed by the upper computer, the test errorsof the tested electronic transformer calibrator is obtained; and therefore, full traceability work is finished.
Description
Technical field
The present invention relates to a kind of electronic transducer calibration instrument to trace to the source field tests, particularly relate to a kind of electronic transducer calibration instrument source tracing method and system.
Background technology
Along with the Rapid Popularization of digital transformer substation and intelligent substation makes electronic mutual inductor, the merging the digitized measurement equipment such as unit, digitalized electrical energy meter all be widely applied in power system. At present, existing ripe electronic transducer calibration instrument product on market, the main test angular difference of electronic mutual inductor, ratio and time response etc. have some technical specifications being associated with measuring accuracy.
At present, mainly a kind of calibration operation of tracing to the source of domestic electronic transducer calibration instrument, and the analogue signals of control information are carried by tradition mutual inductor tester whole checking device adjustment output two groups, the transmission of one of which analogue signal is to high accuracy board, and another group analogue signal is transmitted to tested electronic transducer calibration instrument. High precision collecting board sends the signal to host computer after gathering analogue signal, and signal is sent by host computer according to IEC61850-9 protocol format, and transmission is tested electronic transducer calibration instrument extremely. Tested electronic transducer calibration instrument generates Discrepancy Report after gathering the analogue signal of tradition mutual inductor tester whole checking device transmission and the digital signal of host computer transmission respectively, Discrepancy Report result is compared with the control information that tradition mutual inductor tester whole checking device carries, thus obtaining the global error of electronic transducer calibration instrument.
It is a discrete gatherer process that high accuracy board gathers analogue signal, and the sampled value signal that host computer sends does not ensure that its time response, this makes to adopt special version to be suitable for this not free characteristic and discrete IEC61850-9 protocol massages during tested electronic transducer calibration instrument censorship, the datagram stationery that this calibrating mode sends with on-the-spot merging unit of electronic transformer has a tremendous difference, simultaneously, tested electronic transducer calibration instrument introduces the error of the tradition whole checking device of transformer self and the Acquisition Error of high accuracy board in a calibration process, cause that checking precision is relatively low.There is presently no the tracing technology of a kind of electronic transducer calibration instrument and can bring the complete test events such as the time response of electronic transducer calibration instrument into tracing to the source process, and there is enough sampling precisions.
Summary of the invention
The present invention provides a kind of electronic transducer calibration instrument source tracing method and system, to solve the technical problem that in prior art, the checking precision of tested electronic transducer calibration instrument is low.
The present invention provides a kind of electronic transducer calibration instrument source tracing method, and described electronic transducer calibration instrument source tracing method includes:
Digital multimeter gathers the analogue signal that controllable simulation signal source sends, and described analogue signal is converted to numeral message;
Host computer gathers described numeral message, and by overlay error information after described numeral message virtual reconstruction, forms reconstruct message, and wherein, described control information includes amplitude error, phase error and delay time error;
Message controller gathers described reconstruct message, and carries out sending after sequencing contro to tested electronic transducer calibration instrument according to described reconstruct message;
Tested electronic transducer calibration instrument gathers the analogue signal of controllable simulation signal source transmission and the reconstruct message of message controller transmission respectively, and the reconstruct message sent according to described analogue signal and described message controller generates control information;
Contrast the control information of tested electronic transducer calibration instrument generation and the control information of host computer superposition, obtain the test error of tested electronic transducer calibration instrument.
Preferably, described overlay error information includes:
When control model is continuation mode and when meeting x≤n < x+act, then host computer sends sequence number parameter seq and relative time delay parameter offset, wherein, seq=n/ (f/1000), offset=n% (f/1000) * t+ Δ t;
When control model is continuation mode and when meeting n < x or n >=x+act, then host computer sends sequence number parameter seq and relative time delay parameter offset, wherein, seq=n/ (f/1000), offset=n% (f/1000) * t;
When control model is random fashion and when meeting flag [n]=1, then host computer sends sequence number parameter seq and relative time delay parameter offset, wherein, seq=n/ (f/1000), offset=n% (f/1000) * t+ Δ t;
When control model is random fashion and when meeting flag [n] ≠ 1, then host computer sends sequence number parameter seq and relative time delay parameter offset, wherein, seq=n/ (f/1000), offset=n% (f/1000) * t;
Wherein, x is random number, and n is that message sends sequence number, and act is side-play amount, and f is the message transmission frequency of upper computer software configuration, and t is that every frame message on average sends correspondence count value interval time, and Δ t is the count value that variable Δ is corresponding.
Preferably, described electronic transducer calibration instrument source tracing method also includes time clock tracking, and described time clock tracking includes:
Controller calculates the number differences of incoming message and outgoing message in real time, and sends described number differences to executor;
Executor regulates crystal oscillator according to described number differences and interrupts count value.
Preferably, described electronic transducer calibration instrument source tracing method also includes: the big voltage analog signal that controllable simulation signal source exports is converted to small voltage analogue signal; The big current analog signal that controllable simulation signal source exports is converted to small area analysis analogue signal.
The present invention provides a kind of electronic transducer calibration instrument traceability system, and described electronic transducer calibration instrument traceability system includes:
Controllable simulation signal source;
The digital multimeter electrically connected with described controllable simulation signal source respectively and tested electronic transducer calibration instrument;
The host computer electrically connected with described digital multimeter;
The message controller electrically connected with described host computer and described tested electronic transducer calibration instrument respectively.
Preferably, described host computer also includes: data acquisition module; The virtual reconstruction module electrically connected with described data acquisition module; And, the control information laminating module electrically connected with described virtual reconstruction module.
Preferably, described electronic transducer calibration instrument traceability system also includes: the high precision current transformer electrically connected with described controllable simulation signal source respectively and inductive voltage divider.
The technical scheme that embodiments of the invention provide can include following beneficial effect:
The present invention proposes a kind of electronic transducer calibration instrument source tracing method and system, by digital multimeter sampled data being carried out the mode of virtual reconstruction, the digital message making its output is consistent with the message that actual merging unit of electronic transformer exports, and the control information of the control information and host computer superposition by contrasting the generation of tested electronic transducer calibration instrument, obtain the test error of tested electronic transducer calibration instrument, thus completing the work of completely tracing to the source of electronic transducer calibration instrument, solve the problem that cannot bring the time response of electronic transducer calibration instrument into tracing to the source process in current electronic transducer calibration instrument tracing technology, achieve and not only can guarantee that sampling precision but also there is tracing to the source of good time response and the complete electronic transducer calibration instrument of message.
It should be appreciated that it is only exemplary and explanatory that above general description and details hereinafter describe, the present invention can not be limited.
Accompanying drawing explanation
Fig. 1 is the method flow diagram of a kind of electronic transducer calibration instrument source tracing method provided in the embodiment of the present invention;
Fig. 2 is the structural representation of the time clock tracking actuator provided in the embodiment of the present invention;
Fig. 3 is the structural representation of a kind of electronic transducer calibration instrument traceability system provided in the embodiment of the present invention.
Detailed description of the invention
Here in detail exemplary embodiment being illustrated, its example representation is in the accompanying drawings. When as explained below relates to accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represents same or analogous key element. Embodiment described in following exemplary embodiment does not represent all embodiments consistent with the present invention. On the contrary, they only with in appended claims describe in detail, the present invention some in the example of consistent device.
Each embodiment in this specification all adopts the mode gone forward one by one to describe, between each embodiment identical similar part mutually referring to, what each embodiment stressed is the difference with other embodiments.
Refer to Fig. 1, it is shown that the method flow diagram of a kind of electronic transducer calibration instrument source tracing method for providing in the embodiment of the present invention.
As shown in Figure 1, the present invention provides a kind of electronic transducer calibration instrument source tracing method, described electronic transducer calibration instrument source tracing method includes: digital multimeter gathers the analogue signal that controllable simulation signal source sends, and described analogue signal is converted to numeral message; Host computer gathers described numeral message, and by overlay error information after described numeral message virtual reconstruction, forms reconstruct message, and wherein, described control information includes amplitude error, phase error and delay time error; Message controller gathers described reconstruct message, and carries out sending after sequencing contro to tested electronic transducer calibration instrument according to described reconstruct message; Tested electronic transducer calibration instrument gathers the analogue signal of controllable simulation signal source transmission and the reconstruct message of message controller transmission respectively, and the reconstruct message sent according to described analogue signal and described message controller generates control information; Contrast the control information of tested electronic transducer calibration instrument generation and the control information of host computer superposition, obtain the test error of tested electronic transducer calibration instrument.
Further, described electronic transducer calibration instrument source tracing method also includes: the big voltage analog signal that controllable simulation signal source exports is converted to small voltage analogue signal;The big current analog signal that controllable simulation signal source exports is converted to small area analysis analogue signal.
In the present embodiment, controllable simulation signal source output stable simulation current and voltage signals, its degree of stability is better than 0.01%, and current signal concatenates, voltage also connects, and is respectively connected to high accuracy I/V conversion equipment, high accuracy V/V conversion equipment and tested electronic transducer calibration instrument.
In the present embodiment, high accuracy I/V conversion adopts the mode of high precision current transformer and sample resistance to realize high accuracy conversion, and 5A/2V, 1A/2V, its conversion accuracy can reach 0.01%.
High accuracy V/V conversion adopts inductive voltage divider to realize, and 100V/2V, conversion accuracy is up to 0.005%.
The gatherer process of digital multimeter is discrete, namely adopts the mode of second triggering to complete collecting work, data is packed, upload in the way of data message after gathering 200ms data altogether. Data are carried out virtual reconstruction after receiving sample values by host computer, fictionalize whole number of seconds evidence, are then superimposed with control information again.
Further, described electronic transducer calibration instrument source tracing method also includes time clock tracking, and described time clock tracking includes: controller calculates the number differences of incoming message and outgoing message in real time, and sends described number differences to executor; Executor regulates crystal oscillator according to described number differences and interrupts count value.
Refer to Fig. 2, it is shown that the structural representation of the time clock tracking actuator for providing in the embodiment of the present invention.
As shown in Figure 2, owing to controllable simulation signal source and message controller clock crystal oscillator accuracy between the two there are differences, in order to prevent the output of message controller message from interrupting or overflowing, it is possible to set up closed-loop regulating system at message controller input and outfan, constitute time clock tracking actuator. Signal input quantity is the message number received, and output is for sending message number. Controller calculates the difference of input and outgoing message number in real time, and the scope control executor according to difference regulates crystal oscillator interruption count value, it is achieved controllable simulation signal source and message controller send the concordance of beat.
Further, described overlay error information includes: superposition amplitude error information and phase error information:
If original signal: U (n)=Umsin(ωnTs)
If output signal differs Ke times with original signal amplitude, then:
U ' (n)=(1+Ke)Umsin(ωnTs)
If output signal and original signal phase angleThen:
Wherein N is every cycle sampling number.
Superposition delay time error includes:
Set up variable Δ ∈ [-10,10], be defined as message and send spaced discrete value. The unit interval count value count of the message transmission frequency f configured according to host computer and executor's statistics, calculates the count value Δ t=Δ * count/1000000 that Δ is corresponding, and every frame message on average sends correspondence count value t=count/f interval time.
When control model is continuation mode, producing random number x by calling the equiprobability random number extraction algorithm based on window, current message sends sequence number n, if x is odd number, is considered as negative bias, and namely Δ is negative, if x is even number, is considered as positively biased. When meeting x≤n < x+act condition, then host computer sends sequence number parameter seq and relative time delay parameter offset, wherein, seq=n/ (f/1000), offset=n% (f/1000) * t+ Δ t;
When control model is continuation mode and when meeting n < x or n >=x+act, then host computer sends sequence number parameter seq and relative time delay parameter offset, wherein, seq=n/ (f/1000), offset=n% (f/1000) * t;
Wherein, x is random number, and n is that message sends sequence number, and act is side-play amount, and f is the message transmission frequency of upper computer software configuration, and t is that every frame message on average sends correspondence count value interval time, and Δ t is the count value that variable Δ is corresponding.
When control model is random fashion, generate random number series flag [total], by control strategy assignment. Current message sends sequence number n, if x is odd number, is considered as negative bias, and namely Δ is negative, if x is even number, is considered as positively biased. When meeting flag [n]=1 condition, host computer sends sequence number parameter seq and relative time delay parameter offset, wherein, seq=n/ (f/1000), offset=n% (f/1000) * t+ Δ t;
When control model is random fashion and when meeting flag [n] ≠ 1, then host computer sends sequence number parameter seq and relative time delay parameter offset, wherein, seq=n/ (f/1000), offset=n% (f/1000) * t;
The present invention proposes a kind of electronic transducer calibration instrument source tracing method, by digital multimeter sampled data being carried out the mode of virtual reconstruction, the digital message making its output is consistent with the message that actual merging unit of electronic transformer exports, and the control information of the control information and host computer superposition by contrasting the generation of tested electronic transducer calibration instrument, obtain the test error of tested electronic transducer calibration instrument, thus completing the work of completely tracing to the source of electronic transducer calibration instrument, solve the problem that cannot bring the time response of electronic transducer calibration instrument into tracing to the source process in current electronic transducer calibration instrument tracing technology, achieve and not only can guarantee that sampling precision but also there is tracing to the source of good time response and the complete electronic transducer calibration instrument of message.
Refer to Fig. 3, it is shown that the structural representation of a kind of electronic transducer calibration instrument traceability system for providing in the embodiment of the present invention.
From the figure 3, it may be seen that the present invention provides a kind of electronic transducer calibration instrument traceability system, described electronic transducer calibration instrument traceability system includes:
Controllable simulation signal source;
The digital multimeter electrically connected with described controllable simulation signal source respectively and tested electronic transducer calibration instrument;
The host computer electrically connected with described digital multimeter;
The message controller electrically connected with described host computer and described tested electronic transducer calibration instrument respectively.
Further, described host computer also includes: data acquisition module; The virtual reconstruction module electrically connected with described data acquisition module; And, the control information laminating module electrically connected with described virtual reconstruction module.
Further, described electronic transducer calibration instrument traceability system also includes: the high precision current transformer electrically connected with described controllable simulation signal source respectively and inductive voltage divider.
Invention described above embodiment, is not intended that limiting the scope of the present invention. Any amendment, equivalent replacement and improvement etc. made within the spirit and principles in the present invention, should be included within protection scope of the present invention.
The above is only the specific embodiment of the present invention, makes to skilled artisans appreciate that or realize the present invention. The multiple amendment of these embodiments be will be apparent to one skilled in the art, and generic principles defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments. Therefore, the present invention is not intended to be limited to the embodiments shown herein, and is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (7)
1. an electronic transducer calibration instrument source tracing method, it is characterised in that described electronic transducer calibration instrument source tracing method includes:
Digital multimeter gathers the analogue signal that controllable simulation signal source sends, and described analogue signal is converted to numeral message;
Host computer gathers described numeral message, and by overlay error information after described numeral message virtual reconstruction, forms reconstruct message, and wherein, described control information includes amplitude error, phase error and delay time error;
Message controller gathers described reconstruct message, and carries out sending after sequencing contro to tested electronic transducer calibration instrument according to described reconstruct message;
Tested electronic transducer calibration instrument gathers the analogue signal of controllable simulation signal source transmission and the reconstruct message of message controller transmission respectively, and the reconstruct message sent according to described analogue signal and described message controller generates control information;
Contrast the control information of tested electronic transducer calibration instrument generation and the control information of host computer superposition, obtain the test error of tested electronic transducer calibration instrument.
2. electronic transducer calibration instrument source tracing method according to claim 1, it is characterised in that described overlay error information includes:
When control model is continuation mode and when meeting x≤n < x+act, then host computer sends sequence number parameter seq and relative time delay parameter offset, wherein, seq=n/ (f/1000), offset=n% (f/1000) * t+ Δ t;
When control model is continuation mode and when meeting n < x or n >=x+act, then host computer sends sequence number parameter seq and relative time delay parameter offset, wherein, seq=n/ (f/1000), offset=n% (f/1000) * t;
When control model is random fashion and when meeting flag [n]=1, then host computer sends sequence number parameter seq and relative time delay parameter offset, wherein, seq=n/ (f/1000), offset=n% (f/1000) * t+ Δ t;
When control model is random fashion and when meeting flag [n] ≠ 1, then host computer sends sequence number parameter seq and relative time delay parameter offset, wherein, seq=n/ (f/1000), offset=n% (f/1000) * t;
Wherein, x is random number, and n is that message sends sequence number, and act is side-play amount, and f is the message transmission frequency of upper computer software configuration, and t is that every frame message on average sends correspondence count value interval time, and Δ t is the count value that variable Δ is corresponding.
3. electronic transducer calibration instrument source tracing method according to claim 1, it is characterised in that described electronic transducer calibration instrument source tracing method also includes time clock tracking, and described time clock tracking includes:
Controller calculates the number differences of incoming message and outgoing message in real time, and sends described number differences to executor;
Executor regulates crystal oscillator according to described number differences and interrupts count value.
4. electronic transducer calibration instrument source tracing method according to claim 1, it is characterised in that described electronic transducer calibration instrument source tracing method also includes:
The big voltage analog signal that controllable simulation signal source exports is converted to small voltage analogue signal;
The big current analog signal that controllable simulation signal source exports is converted to small area analysis analogue signal.
5. an electronic transducer calibration instrument traceability system, it is characterised in that described electronic transducer calibration instrument traceability system includes:
Controllable simulation signal source;
The digital multimeter electrically connected with described controllable simulation signal source respectively and tested electronic transducer calibration instrument;
The host computer electrically connected with described digital multimeter;
The message controller electrically connected with described host computer and described tested electronic transducer calibration instrument respectively.
6. electronic transducer calibration instrument traceability system according to claim 5, it is characterised in that described host computer also includes:
Data acquisition module;
The virtual reconstruction module electrically connected with described data acquisition module; And,
The control information laminating module electrically connected with described virtual reconstruction module.
7. electronic transducer calibration instrument traceability system according to claim 5, it is characterised in that described electronic transducer calibration instrument traceability system also includes: the high precision current transformer electrically connected with described controllable simulation signal source respectively and inductive voltage divider.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106483489A (en) * | 2016-11-17 | 2017-03-08 | 云南电网有限责任公司电力科学研究院 | The assay device of the mutual-inductor tester based on detection feedback |
| CN107462859A (en) * | 2017-08-04 | 2017-12-12 | 中国电力科学研究院 | It is a kind of based on the electronic mutual inductor magnitude tracing system and method synchronously triggered |
| CN108241137A (en) * | 2017-12-18 | 2018-07-03 | 海南电网有限责任公司 | A kind of elementary error of combining unit tester is traced to the source device |
| CN115840185A (en) * | 2023-02-20 | 2023-03-24 | 威胜集团有限公司 | Voltage transformer error online monitoring and analyzing method, medium and terminal |
-
2016
- 2016-01-28 CN CN201610059120.8A patent/CN105676160B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106483489A (en) * | 2016-11-17 | 2017-03-08 | 云南电网有限责任公司电力科学研究院 | The assay device of the mutual-inductor tester based on detection feedback |
| CN106483489B (en) * | 2016-11-17 | 2023-09-29 | 云南电网有限责任公司电力科学研究院 | Calibrating device of mutual-inductor check gauge based on detection feedback |
| CN107462859A (en) * | 2017-08-04 | 2017-12-12 | 中国电力科学研究院 | It is a kind of based on the electronic mutual inductor magnitude tracing system and method synchronously triggered |
| CN108241137A (en) * | 2017-12-18 | 2018-07-03 | 海南电网有限责任公司 | A kind of elementary error of combining unit tester is traced to the source device |
| CN108241137B (en) * | 2017-12-18 | 2023-11-03 | 海南电网有限责任公司 | Basic error traceability device of merging unit tester |
| CN115840185A (en) * | 2023-02-20 | 2023-03-24 | 威胜集团有限公司 | Voltage transformer error online monitoring and analyzing method, medium and terminal |
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