CN106405464B - A kind of method for the random waveform simulated power signal that generation can trace to the source - Google Patents
A kind of method for the random waveform simulated power signal that generation can trace to the source Download PDFInfo
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- CN106405464B CN106405464B CN201610882185.2A CN201610882185A CN106405464B CN 106405464 B CN106405464 B CN 106405464B CN 201610882185 A CN201610882185 A CN 201610882185A CN 106405464 B CN106405464 B CN 106405464B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 10
- 238000004088 simulation Methods 0.000 claims description 8
- 238000002955 isolation Methods 0.000 claims description 5
- 238000004870 electrical engineering Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000012905 input function Methods 0.000 claims description 2
- 230000003321 amplification Effects 0.000 description 3
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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
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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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
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
- G01R35/007—Standards or reference devices, e.g. voltage or resistance standards, "golden references"
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Abstract
The invention discloses a kind of methods for the random waveform simulated power signal that generation can trace to the source, pass through Fourier decomposition, it is direct current, fundamental wave and harmonic wave three classes signal by any wave signal decomposition of access, every class signal is respectively converted into corresponding analog quantity voltage signal and analog quantity current signal by corresponding simulated power source, the analog quantity voltage signal of every class signal and analog quantity current signal is taken to carry out series connection and parallel connection respectively, random waveform analog voltage and analog current are obtained, to realize the simulated power signal for generating random waveform.Meanwhile the analog quantity voltage signal and analog quantity current signal of every class signal access corresponding power meter, to realize the simulated power signal for the random waveform that generation can trace to the source.The simulated power signal of the random waveform traced to the source accesses intelligent electric meter as input signal, can simulate the true operating condition of intelligent electric meter completely, evaluate to the elementary error of intelligent electric meter, is conducive to the actual performance for understanding intelligent electric meter.
Description
Technical field
The present invention relates to electric device maintenance technical fields, and in particular to a kind of random waveform that generation can trace to the source simulation function
The method of rate signal.
Background technique
With the continuous development of urban construction and electric system, intelligent electric meter is had been more and more widely used, intelligence electricity
The performance quality of table will directly affect the normal operation of substation and power transmission lines, therefore need before formally coming into operation pair
Intelligent electric meter is examined and determine to guarantee its performance.At present to the calibrating of intelligent electric energy meter elementary error, usually have method of standard table and
Two kinds of standard source method, but regardless of which kind of method used, defined reference condition is all the feelings in more satisfactory sinusoidal signal
It is examined and determine under condition.But the actual operating condition of intelligent electric meter is dynamic load, and reference condition is that sinusoidal signal can not be complete
The true operating condition of intelligent electric meter is simulated, if to consider its dynamic load characteristic, it is necessary first to random waveform can be generated
Simulated power source, meanwhile, if further evaluated to the elementary error of intelligent electric meter, which must also be for can
It traces to the source.
One is calibration power sources for current power source, can generate the sinusoidal signal of standard, can trace to the source；Another kind is standard
Harmonic power source can generate the harmonic signal of standard, can trace to the source；Also one is the power sources that can generate random waveform, still
It can not trace to the source.The requirement that above-mentioned power source, which is unable to satisfy, can generate random waveform signal, can trace to the source again.
Summary of the invention
Random waveform signal can be generated the technical problem to be solved by the present invention is to power source and is traced to the source, and purpose exists
In providing a kind of method of random waveform simulated power signal that generation can trace to the source, can generate can trace to the source, the mould of random waveform
Quasi- power signal, the signal access intelligent electric meter as input signal, can simulate the true operating condition of intelligent electric meter completely,
The elementary error of intelligent electric meter is evaluated, the actual performance for understanding intelligent electric meter is conducive to.
The present invention is achieved through the following technical solutions:
A kind of method for the random waveform simulated power signal that generation can trace to the source, includes the following steps:
A, random waveform is accessed, access waveform is analyzed, direct current signal, fundamental signal and harmonic signal are obtained；
B, by direct current signal, the fundamental signal corresponding simulated power source of input synchronous with harmonic signal, simulated power
Digital quantity signal is converted to analog signals output by source, wherein direct current signal input direct-current simulated power source, fundamental signal are defeated
Enter fundamental wave simulated power source, harmonic signal is specifically, n times harmonic signal inputs N-1 harmonic wave simulated power source, and wherein N is big
In the positive integer for being equal to 2；
C, the analog voltage signal by the output of each simulated power source is connected, and obtains random waveform analog voltage；It will be each
The analog current signal of simulated power source output is in parallel, obtains random waveform analog current；
D, the analog voltage signal of each simulated power source output and analog current signal are accessed into corresponding standard
Power meter obtains the performance number in each simulated power source.
Particularly, access waveform is analyzed using Fourier decomposition in the step A.
Particularly, the random waveform accessed in the step A can be the typical wave mentioned in IEC international electrical engineering standard
Shape passes through any one of typical load waveform of power grid in the waveform and substation's actual motion of input function generation.
Particularly, N is the positive integer less than or equal to 30 in the step B.
Particularly, mutually insulated isolation between the analog voltage signal of each simulated power source output in the step C.
Particularly, mutually insulated isolation between the analog current signal of each simulated power source output in the step C.
Particularly, the method for the random waveform simulated power signal that a kind of generation can trace to the source further includes step E, will be every
The performance number in a simulated power source is added, and obtains power source calibration power value.
Compared with prior art, the present invention having the following advantages and benefits:
The method for the random waveform simulated power signal that a kind of generation of the present invention can trace to the source, can generate can trace to the source,
The simulated power signal of random waveform, the signal access intelligent electric meter as input signal, it is true can to simulate completely intelligent electric meter
Real operating condition, evaluates the elementary error of intelligent electric meter, is conducive to the actual performance for understanding intelligent electric meter.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is the method flow diagram for the random waveform simulated power signal that the generation that the embodiment of the present invention 1 provides can trace to the source.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is made below with reference to embodiment
Further to be described in detail, exemplary embodiment of the invention and its explanation for explaining only the invention, are not intended as to this
The restriction of invention.
Embodiment 1
In the present embodiment, the method for generating the random waveform simulated power signal that can be traced to the source is specifically included:
S101, access random waveform, analyze access waveform, obtain direct current signal, fundamental signal and harmonic signal；
Random waveform is accessed, which can be the typical waveform mentioned in IEC international electrical engineering standard or by input letter
The typical load waveform etc. of power grid in the waveform or substation's actual motion that number formula generates, using Fourier decomposition to access
Random waveform is analyzed, and the signal after decomposition includes direct current signal, fundamental signal and harmonic signal, and wherein harmonic signal includes
Second harmonic, triple-frequency harmonics, four-time harmonic ... are until n times harmonic wave, N are the positive integer more than or equal to 2.The Fourier decomposition
Formula are as follows:
Wherein,The DC component obtained after decomposing, n=1 are fundametal compoment, and n=2 is 2 order harmonic components, with such
It pushes away, n=N is n times harmonic component.
S102, by direct current signal, the fundamental signal corresponding simulated power source of input synchronous with harmonic signal, simulate function
Digital quantity signal is converted to analog signals and exported after amplifying by rate source；
Under control of the synchronization signal, by direct current signal input direct-current simulated power source, fundamental signal inputs fundamental wave simulation
Power source, 2 rd harmonic signals input first harmonic simulated power source, 3 rd harmonic signals input second harmonic simulated power source, 4
Rd harmonic signal inputs third harmonic simulated power source ... and so on, and n times harmonic signal inputs N-1 harmonic wave simulated power
Source.Direct current signal, fundamental signal and harmonic signal are digital quantity signal, the digital quantity that each simulated power source will respectively input
Signal is converted to corresponding analog signals and exports after amplifying.In the present embodiment, N value be more than or equal to 2 be less than etc.
In 30 positive integer.It should be noted that N makes the appropriate adjustments with the variation to ammeter calibration accuracy and cost requirement, can be selected
Positive integer more than 30, with the increase of N value, then higher to the calibration accuracy of ammeter, correspondingly cost is higher.Conversely, N value
It is smaller, then the calibration accuracy of ammeter and correspondingly cost is lower.
S103, the analog voltage signal of each simulated power source output is connected, obtains random waveform analog voltage；It will be every
The analog current signal of a simulated power source output is in parallel, obtains random waveform analog current；
The analog signals of simulated power source output include analog voltage signal and analog current signal, wherein each simulation
There is no electrical relation between the analog voltage signal of power source output, without electric potential relation, mutual insulating isolation, by each mould yet
The analog voltage signal series connection of quasi- power source output, the mixing of alternating current-direct current is realized by concatenated method, obtains random waveform mould
Quasi- voltage；Also without electrical relation between the analog current signal of each simulated power source output, also without electric potential relation, mutually
It is dielectrically separated from, the analog current signal of each simulated power source output is in parallel, the mixed of alternating current-direct current is realized by method in parallel
It closes, obtains random waveform analog current.
S104, the analog voltage signal of each simulated power source output and analog current signal are accessed into corresponding mark
Quasi- power meter obtains the performance number in each simulated power source.
The analog quantity voltage signal and analog quantity current signal input direct-current power meter that DC simulation power source is exported, are obtained
The performance number of DC simulation power source is obtained, and is shown on power meter；By the analog quantity electricity of fundamental wave simulated power source output
It presses signal and analog quantity current signal to input fundamental power table, obtains the performance number in fundamental wave simulated power source, and on power meter
It is shown；The analog quantity voltage signal of first harmonic simulated power source output and analog quantity current signal are inputted into first harmonic
Power meter, obtains the performance number in first harmonic simulated power source, and is shown on power meter；By second harmonic simulated power
The analog quantity voltage signal and analog quantity current signal of source output input second harmonic power meter, obtain second harmonic simulated power
The performance number in source, and shown on power meter ... and so on, the analog quantity electricity of the harmonic wave simulated power source N-1 output
It presses signal and analog quantity current signal to input N-1 harmonic power table, obtains the performance number in N-1 harmonic wave simulated power source, and
It is shown on power meter.
S105, the performance number in each simulated power source is added, obtains power source calibration power value.
By DC simulation power source, fundamental wave simulated power source, first harmonic simulated power source, second harmonic simulated power
The performance number in source ... N-1 harmonic wave simulated power source is added, and obtains power source calibration power value.
Finger of tracing to the source traces back to physical quantity on one fundamental physical quantity guiding principle, has National primary standard.Can trace to the source the standard of power source
Exactness grade can be evaluated, and can detect to the elementary error of intelligent electric meter, use as standard set-up.But existing power source
Simulated power signal is exported after directly carrying out D/A conversion and amplification to access waveform, is single waveform when accessing waveform, it is such as single
50Hz sinusoidal signal, then the external power meter of simulated power signal exported, because calibration power table be by national verification,
The value of display is exactly a standard value, therefore may be implemented to trace to the source；And when accessing waveform is any wave, equally converted through D/A
It is single that premise with the external power meter of simulated power signal exported after amplification, but power meter display standard value, which is access signal,
Waveform, when being random waveform for access signal, the value of display is not real standard value, then when accessing random waveform,
Power source, which can not achieve, can really trace to the source, and class of accuracy can not be evaluated.The present embodiment will access signal decomposition at single
Direct current, fundamental wave, carry out D/A conversion and amplification respectively after harmonic signal after access calibration power table again, then can produce can trace to the source
Random waveform simulated power signal.
Any wave signal decomposition of access is direct current, fundamental wave harmony by Fourier decomposition by technical solution of the present invention
Wave three classes signal, by corresponding simulated power source by every class signal be respectively converted into corresponding analog quantity voltage signal and
Analog quantity current signal takes the analog quantity voltage signal of every class signal to connect and obtains random waveform analog voltage, takes every class signal
Analog quantity current signal parallel connection obtain random waveform analog current, thus realize generate random waveform simulated power letter
Number.Meanwhile the analog quantity voltage signal and analog quantity current signal of every class signal access corresponding power meter, obtain every class signal
Performance number, to realize the simulated power signal of random waveform that generates and can trace to the source.The random waveform traced to the source
Simulated power signal accesses intelligent electric meter as input signal, the true operating condition of intelligent electric meter can be simulated completely, to intelligence
The elementary error of energy ammeter is evaluated, and the actual performance for understanding intelligent electric meter is conducive to.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (6)
1. a kind of method for the random waveform simulated power signal that generation can trace to the source, which comprises the steps of:
A, random waveform is accessed, access waveform is analyzed using Fourier decomposition, obtains direct current signal, fundamental signal and humorous
Wave signal；
B, by direct current signal, the fundamental signal corresponding simulated power source of input synchronous with harmonic signal, simulated power source will
Digital quantity signal is converted to analog signals and exports after amplifying, wherein direct current signal input direct-current simulated power source, base
Wave signal inputs fundamental wave simulated power source, and the n times harmonic signal of harmonic signal inputs N-1 harmonic wave simulated power source, and wherein N is
Positive integer more than or equal to 2；
C, the analog quantity voltage signal by the output of each simulated power source is connected, and obtains random waveform analog voltage；By each mould
The analog quantity current signal of quasi- power source output is in parallel, obtains random waveform analog current；
D, the analog quantity voltage signal and analog quantity current signal input direct-current power meter exported DC simulation power source obtains
The performance number of DC simulation power source, and shown on power meter；The analog quantity voltage that fundamental wave simulated power source is exported
Signal and analog quantity current signal input fundamental power table, obtain the performance number in fundamental wave simulated power source, and enterprising in power meter
Row display；The analog quantity voltage signal of first harmonic simulated power source output and analog quantity current signal are inputted into first harmonic function
Rate table, obtains the performance number in first harmonic simulated power source, and is shown on power meter；By second harmonic simulated power source
The analog quantity voltage signal and analog quantity current signal of output input second harmonic power meter, obtain second harmonic simulated power source
Performance number, and shown on power meter ... and so on, the analog quantity of the harmonic wave simulated power source N-1 output
Voltage signal and analog quantity current signal input N-1 harmonic power table, obtain the power in N-1 harmonic wave simulated power source
Value, and shown on power meter.
2. generating the method for the random waveform simulated power signal that can be traced to the source as described in claim 1, which is characterized in that described
The random waveform accessed in step A can be the typical waveform mentioned in IEC international electrical engineering standard, by input function generation
Any one of the typical load waveform of power grid in waveform and substation's actual motion.
3. generating the method for the random waveform simulated power signal that can be traced to the source as described in claim 1, which is characterized in that described
N is the positive integer less than or equal to 30 in step B.
4. generating the method for the random waveform simulated power signal that can be traced to the source as described in claim 1, which is characterized in that described
Mutually insulated isolation between the analog quantity voltage signal of each simulated power source output in step C.
5. generating the method for the random waveform simulated power signal that can be traced to the source as described in claim 1, which is characterized in that described
Mutually insulated isolation between the analog quantity current signal of each simulated power source output in step C.
6. generating the method for the random waveform simulated power signal that can be traced to the source as described in claim 1, which is characterized in that also wrap
Step E is included, the performance number in each simulated power source is added, obtains power source calibration power value.
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| CN106788924B (en) * | 2017-03-13 | 2019-08-30 | 贵州电网有限责任公司电力科学研究院 | A kind of message generation system and its production method realized sampling value message and lose control output function |
| CN107102182A (en) * | 2017-05-25 | 2017-08-29 | 中国电力科学研究院 | Centralized surge voltage reference waveform method for generation and system for magnitude tracing |
| CN108918924A (en) * | 2018-08-31 | 2018-11-30 | 上海交通大学 | Complicated Periodic wave voltage simulation generator based on signal times die pressing type |
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| CN203405564U (en) * | 2013-08-22 | 2014-01-22 | 国家电网公司 | Harmonic current standard source device |
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| CN205229427U (en) * | 2015-11-30 | 2016-05-11 | 四川航天计量测试研究所 | D.C. high -current power calibrating installation |
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| JP3599157B2 (en) * | 1998-03-02 | 2004-12-08 | 関西電力株式会社 | Power system harmonic real-time simulator |
| KR101035702B1 (en) * | 2010-06-29 | 2011-05-19 | 한국전력공사 | Apparatus and method for measuring the power quality |
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|---|---|---|---|---|
| CN103336264A (en) * | 2013-06-07 | 2013-10-02 | 国家电网公司 | Digital electric energy meter quantity value tracing system based on analog quantity detection and digital electric energy meter quantity value tracing method based analog quantity detection |
| CN203405564U (en) * | 2013-08-22 | 2014-01-22 | 国家电网公司 | Harmonic current standard source device |
| CN105242231A (en) * | 2015-09-08 | 2016-01-13 | 国家电网公司 | Digital electric energy measurement performance detection and tracing method and closed-loop system |
| CN105203986A (en) * | 2015-09-16 | 2015-12-30 | 国家电网公司 | Digital power source tracing method and system |
| CN205229427U (en) * | 2015-11-30 | 2016-05-11 | 四川航天计量测试研究所 | D.C. high -current power calibrating installation |
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