CN105548947B - A kind of synchronous source tracing method of digitalized electrical energy meter and system - Google Patents
A kind of synchronous source tracing method of digitalized electrical energy meter and system Download PDFInfo
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- CN105548947B CN105548947B CN201610058854.4A CN201610058854A CN105548947B CN 105548947 B CN105548947 B CN 105548947B CN 201610058854 A CN201610058854 A CN 201610058854A CN 105548947 B CN105548947 B CN 105548947B
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The present invention provides a kind of synchronous source tracing method of digitalized electrical energy meter and system, and method includes: that mock standard table and high-speed a/d conversion equipment acquire the analog signal that mock standard source exports simultaneously, and mock standard table converts analog signals into electric power signal N1；Digital standard source acquires the digital signal of high-speed a/d conversion equipment output, and is converted to corresponding electric power signal X2；Digital standard table acquires the digital signal of digital standard source output, and is converted to corresponding electric power signal X3；Error Calculator acquires N1, X2 and X3, further obtains trueness error.The present invention be directed to the problems of tracing to the source of digitalized electrical energy meter, acquire the instantaneous value and electric degree value of analog quantity simultaneously in synchronization in the way of the separation of table source, and by digital standard table and digital standard source synchronize trace to the source, establish standard digital electric energy meter to analog quantity link of tracing to the source, it ensures the accurate and reliable of digital electrical energy measurement, has ensured the fair and just of electricity trading clearing.
Description
Technical field
Testing field is traced to the source the present invention relates to digitalized electrical energy meter more particularly to a kind of digitalized electrical energy meter synchronizes the side of tracing to the source
Method and system.
Background technique
Currently, the Rapid Popularization of digital transformer substation and intelligent substation makes electronic mutual inductor, combining unit, number
The digitized measurements such as word electric energy meter equipment is all widely applied in electric system, and electronic mutual inductor, combining unit are
The equipment that acquisition analog quantity is switched to digital quantity, has certain incidence relation, therefore, electronic type mutual inductance between analog loopback
There is no too big obstacles for the foundation of device and combining unit traceability system.But digitalized electrical energy meter is a kind of full-digital equipment, number
Word amount is that a codomain is constant, transport system of time domain discrete, and analog quantity is that there are the transmitting of error for the continuous codomain of time domain
System, so this magnitude tracing by analog quantity to digital quantity must be to rely on variation of the codomain in identical time domain to reality
Its existing magnitude tracing.Due between digitalized electrical energy meter and analog loopback there is no being directly associated with, and in link of tracing to the source by
In the appearance of no digital standards equipment, therefore, the problem of tracing to the source of digitalized electrical energy meter is always a bigger problem.
Currently, the calibration technology of digitalized electrical energy meter mainly includes digital standard source method and digital standard table method, i.e., will
The electric flux that the electric flux of digitalized electrical energy meter output and digital standard source or digital standard table export compares, to obtain number
Change the error of electric energy meter.But all there is digital standard source or digital standard table in the source tracing method of both digitalized electrical energy meters
The problem of how precision is verified in analog loopback causes its measuring accuracy not can guarantee.
In addition, the source tracing method there are also a kind of digitalized electrical energy meter is to bring combining unit into digitalized electrical energy meter to trace to the source
In the process, to establish tracing to the source for digital to analogy circuit, but it is this using hypothetical mergers unit as digitalized electrical energy meter one
The source tracing method divided not can guarantee the precision of its test.
Summary of the invention
The present invention provides a kind of synchronous source tracing method of digitalized electrical energy meter and system, to solve digitlization electricity in the prior art
Can table trace to the source the low problem of precision.
The present invention provides a kind of digitalized electrical energy meter synchronization source tracing method, the synchronous source tracing method packet of the digitalized electrical energy meter
It includes:
Mock standard table and high-speed a/d conversion equipment acquire the analog signal of mock standard source output simultaneously, and simulate mark
The analog signal is converted to electric power signal N1 by quasi- table；
Digital standard source acquires the digital signal of high-speed a/d conversion equipment output, and the digital signal is converted to pair
The electric power signal X2 answered；
Digital standard table acquires the digital signal of digital standard source output, and the digital signal is converted to corresponding electricity
It can signal X3；
Error Calculator acquires the electric power signal N1, the electric power signal X2 and the electric power signal X3, and root respectively
The essence in digital standard source and digital standard scale is obtained according to the electric power signal N1, the electric power signal X2 and the electric power signal X3
Spend error.
Preferably, the digital standard source and the trueness error of digital standard scale of obtaining includes: according to the electric power signal
The difference of the X2 and electric power signal N1 calculates the trueness error in digital standard source；According to the electric power signal X3 and the electric energy
The difference of signal N1 calculates the trueness error of digital standard table.
Preferably, the synchronous source tracing method of the digitalized electrical energy meter further include:
The analog signal of 8 half high-precision board acquisition mock standard source output, and number is converted by the analog signal
Word signal；
Instantaneous value sampling system acquires 8 half high-precision boards, high-speed a/d conversion equipment and digital standard source respectively
Digital signal；
Test result is obtained according to the digital signal, and the test result is fed back into high-speed a/d conversion equipment.
The present invention also provides a kind of synchronous traceability system of digitalized electrical energy meter, the synchronous traceability systems of the digitalized electrical energy meter
Include:
Mock standard source；
The mock standard table and high-speed a/d conversion equipment being electrically connected respectively with the mock standard source；
The digital standard source being electrically connected with the high-speed a/d conversion equipment；
And the digital standard table being electrically connected with the digital standard source.
Preferably, the synchronous traceability system of the digitalized electrical energy meter further include:
8 half high-precision boards, 8 half high-precision boards are electrically connected with the mock standard source；
Instantaneous value sampling system, the instantaneous value sampling system are marked with 8 half high-precision boards, the number respectively
Quasi- source and high-speed a/d conversion equipment electrical connection.
The technical solution that the embodiment of the present invention provides can include the following benefits:
The present invention provides a kind of synchronous source tracing method of digitalized electrical energy meter and system, and the digitalized electrical energy meter, which synchronizes, traces to the source
Method includes: mock standard table and high-speed a/d conversion equipment while the analog signal for acquiring the output of mock standard source, and simulates mark
The analog signal is converted to electric power signal N1 by quasi- table；Digital standard source acquires the number letter of high-speed a/d conversion equipment output
Number, and the digital signal is converted into corresponding electric power signal X2；Digital standard table acquires the number of digital standard source output
Signal, and the digital signal is converted into corresponding electric power signal X3；Error Calculator acquires the electric power signal N1, described
The electric power signal X2 and electric power signal X3, and according to the electric power signal N1, the electric power signal X2 and the electric power signal
X3 obtains the trueness error in digital standard source and digital standard scale.The present invention be directed to the problem of tracing to the source of digitalized electrical energy meter, benefits
The instantaneous value and electric degree value of analog quantity are acquired simultaneously in synchronization with the mode that table source separates, and by digital standard table and number
Word standard source, which synchronizes, traces to the source, establish standard digital electric energy meter to analog quantity link of tracing to the source, it is ensured that digital electrical energy measurement
It is accurate and reliable, ensure the fair and just of electricity trading clearing.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
It can the limitation present invention.
Detailed description of the invention
Fig. 1 is a kind of method flow diagram of the synchronous source tracing method of digitalized electrical energy meter provided in the embodiment of the present invention；
Fig. 2 is the method flow diagram of the synchronous source tracing method of another digitalized electrical energy meter provided in the embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of the synchronous traceability system of digitalized electrical energy meter provided in the embodiment of the present invention.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended
The example of device being described in detail in claims, some aspects of the invention are consistent.
All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment
Dividing may refer to each other, and the highlights of each of the examples are differences from other embodiments.
Referring to FIG. 1, showing a kind of side of the synchronous source tracing method of the digitalized electrical energy meter provided in the embodiment of the present invention
Method flow chart.
As shown in Figure 1, the present invention provides a kind of synchronous source tracing method of digitalized electrical energy meter and system, the digitalized electric energy
The synchronous source tracing method of table includes: mock standard table and high-speed a/d conversion equipment while the simulation letter for acquiring the output of mock standard source
Number, and the analog signal is converted to electric power signal N1 by mock standard table；It is defeated that digital standard source acquires high-speed a/d conversion equipment
Digital signal out, and the digital signal is converted into corresponding electric power signal X2；Digital standard table acquires digital standard source
The digital signal of output, and the digital signal is converted into corresponding electric power signal X3；Described in Error Calculator acquires respectively
Electric power signal N1, the electric power signal X2 and the electric power signal X3, and according to the electric power signal N1, the electric power signal X2
The trueness error in digital standard source and digital standard scale is obtained with the electric power signal X3.
Mock standard source exports the analog signal of stable 5A, 100V Current Voltage, electric current, voltage signal are gone here and there respectively,
And accessing mock standard table and high-speed a/d conversion equipment, i.e., mock standard table and high-speed a/d conversion equipment acquire simulation mark simultaneously
The analog signal of quasi- source output.
Mock standard table acquires the analog signal in mock standard source, and exports high speed electric energy metrical pulse.
High-speed a/d conversion equipment acquires the analog signals of mock standard source output, and exports instantaneous sampling value to number
Standard source, sampling rate 64kHz/s, while electric flux signal is transmitted to Error Calculator by high speed fibre pulse.
Digital standard source receives the digital signal from high-speed a/d conversion equipment, and presses according to IEC61850-9-2 agreement
According to 4kHz/s or 12.8kHz/s sampling rate export, while calculate electric flux exported in a manner of high speed fibre electrical energy pulse to
Error Calculator.
Digital standard table connects the digital signal in acquisition digital standard source, and calculates after electric flux in a manner of fiber pulse
It exports to Error Calculator.
Error Calculator acquires the electric power signal N1, the electric power signal X2 and the electric power signal X3 respectively, and produces
Raw four error Es a=X1-N1, Eb=X2-X1, Ec=X3-X2, Ed=X2-N1 and Ee=X3-N1, believe according to the electric energy
Number N1, the electric power signal X2 and the electric power signal X3 obtain the trueness error in digital standard source and digital standard scale.
Further, the precision in digital standard source is calculated according to the difference Ed of the electric power signal X2 and electric power signal N1
Error；The trueness error of digital standard table is calculated according to the difference Ee of the electric power signal X3 and electric power signal N1.Specifically
, Ec, which should be less than 0.005%, Ea, should be less than 0.02%, and wherein Ee digital standard table traces back to the composition error in mock standard source,
It should be equal to Ea, Eb, the sum of Ec in domain at the same time.When guaranteeing that Ec meets 0.005%, synchronization Ed=Ea
+ Eb, achievable digital standard source are traced to the source between mock standard.Ee=Ea+Eb+Ec can be passed through simultaneously in the manner described above,
To obtain the trueness error of digital standard table.
The present invention be directed to the problems of tracing to the source of digitalized electrical energy meter, are adopted simultaneously in the way of the separation of table source in synchronization
Collect the instantaneous value and electric degree value of analog quantity, and by digital standard table and digital standard source synchronize trace to the source, establish standard digital
Trace to the source link of the electric energy meter to analog quantity, it is ensured that digital electrical energy measurement it is accurate and reliable, ensured electricity trading clearing
It is fair and just.
Referring to FIG. 2, showing the synchronous source tracing method of another digitalized electrical energy meter provided in the embodiment of the present invention
Method flow diagram.
As shown in Figure 2, the synchronous source tracing method of the digitalized electrical energy meter further include:
The analog signal of 8 half high-precision board acquisition mock standard source output, and number is converted by the analog signal
Word signal；Instantaneous value sampling system acquires 8 half high-precision boards, high-speed a/d conversion equipment and digital standard source respectively
Digital signal；Test result is obtained according to the digital signal, and the test result is fed back into high-speed a/d conversion equipment.
High-speed a/d conversion equipment receives the adjustment signal from instantaneous value error testing system, and is modified to downsampling factor, to mention
The sampling precision of high whole system, the sampling precision of Current Voltage is less than 0.01%.
Referring to FIG. 3, showing a kind of knot of the synchronous traceability system of the digitalized electrical energy meter provided in the embodiment of the present invention
Structure schematic diagram.
From the figure 3, it may be seen that the present invention also provides a kind of synchronous traceability system of digitalized electrical energy meter, the digitalized electrical energy meter is same
Walking traceability system includes:
Mock standard source；
The mock standard table and high-speed a/d conversion equipment being electrically connected respectively with the mock standard source；
The digital standard source being electrically connected with the high-speed a/d conversion equipment；
And the digital standard table being electrically connected with the digital standard source.
Further, the synchronous traceability system of the digitalized electrical energy meter further include:
8 half high-precision boards, 8 half high-precision boards are electrically connected with the mock standard source；
Instantaneous value sampling system, the instantaneous value sampling system are marked with 8 half high-precision boards, the number respectively
Quasi- source and high-speed a/d conversion equipment electrical connection.
The embodiments of the present invention described above are not intended to limit the scope of the present invention.It is any in the present invention
Spirit and principle within made modifications, equivalent substitutions and improvements etc., should all be included in the protection scope of the present invention.
The above is only a specific embodiment of the invention, is made skilled artisans appreciate that or realizing this hair
It is bright.Various modifications to these embodiments will be apparent to one skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (2)
1. a kind of synchronous source tracing method of digitalized electrical energy meter, which is characterized in that the synchronous source tracing method packet of the digitalized electrical energy meter
It includes:
Mock standard table and high-speed a/d conversion equipment acquire the analog signal of mock standard source output, and mock standard table simultaneously
The analog signal is converted into electric power signal N1；
Digital standard source acquires the digital signal of high-speed a/d conversion equipment output, and the digital signal is converted to corresponding
Electric power signal X2；
Digital standard table acquires the digital signal of digital standard source output, and the digital signal is converted to corresponding electric energy and is believed
Number X3；
Error Calculator acquires the electric power signal N1, the electric power signal X2 and the electric power signal X3 respectively, and according to institute
It states electric power signal N1, the electric power signal X2 and the electric power signal X3 obtains digital standard source and the precision of digital standard scale is missed
Difference；
The analog signal of 8 half high-precision board acquisition mock standard source output, and digital letter is converted by the analog signal
Number；
Instantaneous value sampling system acquires 8 half high-precision boards, high-speed a/d conversion equipment and the number in digital standard source respectively
Signal；
Test result is obtained according to the digital signal, and the test result is fed back into high-speed a/d conversion equipment.
2. the synchronous source tracing method of digitalized electrical energy meter according to claim 1, which is characterized in that the acquisition digital standard
Source and the trueness error of digital standard scale include:
The trueness error in digital standard source is calculated according to the difference of the electric power signal X2 and electric power signal N1；
The trueness error of digital standard table is calculated according to the difference of the electric power signal X3 and electric power signal N1.
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| CN106772204B (en) * | 2016-11-25 | 2019-06-07 | 国网冀北电力有限公司电力科学研究院 | The emulation mode and device of electric energy meter metering circuit |
| CN107884735A (en) * | 2017-10-30 | 2018-04-06 | 国网福建省电力有限公司 | Source tracing method based on light digital quantity transmission of quantity value |
| CN110967658B (en) * | 2018-09-29 | 2022-03-11 | 武汉格蓝若智能技术有限公司 | Analog input merging unit calibrator tracing method based on digital differential method |
| CN109387806B (en) * | 2018-12-21 | 2020-11-20 | 云南电网有限责任公司电力科学研究院 | Digital electric energy meter traceability system error influence analysis method based on simulink simulation |
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| JPH0727842A (en) * | 1993-07-08 | 1995-01-31 | Toshiba Corp | Electronic watt-hour meter |
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| CN201993463U (en) * | 2011-02-24 | 2011-09-28 | 江西省电力科学研究院 | Testing device of digital electric energy meter |
| CN103558577A (en) * | 2013-10-29 | 2014-02-05 | 国家电网公司 | Double-input-type digital standard energy meter, detecting system and quantity value source tracing system |
| CN103901390A (en) * | 2014-04-09 | 2014-07-02 | 国家电网公司 | Meter-source integrated detection device and method used for digitalized electric energy meter detection |
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