CN106771578A - The non-integer-period sampled method of the electric power signal of electric energy meter - Google Patents
The non-integer-period sampled method of the electric power signal of electric energy meter Download PDFInfo
- Publication number
- CN106771578A CN106771578A CN201710172761.9A CN201710172761A CN106771578A CN 106771578 A CN106771578 A CN 106771578A CN 201710172761 A CN201710172761 A CN 201710172761A CN 106771578 A CN106771578 A CN 106771578A
- Authority
- CN
- China
- Prior art keywords
- electric power
- power signal
- frequency
- energy meter
- input signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The present invention relates to electric energy meter field of measuring techniques, the specifically related to non-integer-period sampled method of the electric power signal of electric energy meter, input signal is sampled using signal first, continue the frequency of measurement input signal and electric power signal, continue to calculate compensation rate value with the frequency of electric power signal according to the frequency of input signal, the frequency of electric power signal is compensated using the compensation value, the technical program efficiently accomplished the frequency of electric power signal it is inconsistent with the frequency of input signal in the case of sampling to electric power signal, error is small, the method of sampling and system are applied widely, for the harmonic wave of accurate measurement electric energy meter provides a reliable precondition.
Description
Technical field
The present invention relates to electric energy meter field of measuring techniques, and in particular to the non-integer-period sampled side of the electric power signal of electric energy meter
Method.
Background technology
Now with nonlinear-load (solar energy, wind power grid and rectifier, RHVC, electric arc furnaces, steel rolling
Mechanical, electrical power locomotive and the power electronic equipment that fluorescent lamp is representative) power system is increasingly being applied to, make electricity in power network
Pressure, current waveform often deviate sinusoidal waveform, make traditional metering method theoretical based on steady-state sine work(be difficult to meet this
The requirement of accurate metering under the conditions of distorting loads with harmonic wave.
This aspect reflection has electric energy meter and there is limitation in design, on the other hand also embodies existing electric energy meter
The deficiency of detection means and traceability system.Such as electric energy meter on-site proving work in find, when load fluctuation than it is larger when, greatly
Part field electric energy meter is in the Comparability test of having good luck with standard electric energy meter, and fluctuating error is obvious, and fluctuation pattern
Disunity, or even error occur overproof.Because the test condition of traditional electric energy meter typically requires steady state power source, fluctuation is negative
Measuring accuracy under carrying cannot often be examined, and the load under actual operating state is often not stable state, therefore, it is possible to standard
Really the fundamental wave of measurement electric energy meter, harmonic wave and all-wave electric energy are the basic premises for accurately measuring electric energy, and due to input signal and are adopted
The frequency of sample signal is extremely difficult to unanimously, and traditional method of sampling and sampling apparatus cannot meet requirement.
The content of the invention
The technical problem to be solved in the present invention is to overcome the Sampling techniques of the prior art cannot to meet accurate measurement base
A kind of defect of ripple, harmonic wave and whole electric energy, there is provided non-integer-period sampled method of the electric power signal of electric energy meter, specially：
A kind of non-integer-period sampled method of the electric power signal of electric energy meter, comprises the following steps：
Electric power signal is sampled using input signal；
The frequency of input signal and the frequency of electric power signal are measured respectively；
The frequency of frequency and electric power signal according to input signal calculates compensation rate value；
The frequency of electric power signal is compensated with compensation value.
The non-integer-period sampled method of the electric power signal of above-mentioned electric energy meter, wherein, according to the frequency and electric energy of input signal
The method that the frequency of signal calculates compensation rate value is：The frequency of input signal makees difference operation with the frequency of electric power signal, obtains
It is compensation value to be worth.
The non-integer-period sampled method of the electric power signal of above-mentioned electric energy meter, wherein, with compensation value to the frequency of electric power signal
The method that rate is compensated is：By the frequency of electric power signal plus compensation value, that is, the frequency of the electric power signal after being compensated.
The non-integer-period sampled method of the electric power signal of above-mentioned electric energy meter, wherein, the use input signal is believed electric energy
Before number being sampled, also include：The input signal is by voltage divider partial pressure.
The non-integer-period sampled method of the electric power signal of above-mentioned electric energy meter, wherein, the use input signal is to electric energy meter
Electric power signal sampled before, also include：Modulus will be transformed to by the input signal after voltage divider partial pressure
The small-signal that converter can be recognized.
The non-integer-period sampled method of the electric power signal of the electric energy meter described in above-mentioned any one, wherein, in methods described,
The frequency of input signal is different from the frequency of the electric power signal.
Technical solution of the present invention has the following advantages that：Computational accuracy is improved by calculating uncompensation amount, so that without electric energy
The frequency of signal is consistent with the frequency of input signal, and the frequency for having efficiently accomplished electric power signal is inconsistent with the frequency of input signal
In the case of sampling to electric power signal, error is small, and the method for sampling and system are applied widely, are the harmonic wave for accurately measuring electric energy meter
One reliable precondition is provided.Before input signal is sampled to electric power signal, voltage divider and electric current are first passed around
Transformer, the voltage stabilization of the input signal of effective guarantee collection electric power signal and can be recognized by analog-digital converter, carry
The accuracy of the anon-normal periodic sampling of the electric power signal of electric energy meter high.
Brief description of the drawings
Fig. 1 is flow chart of the method for the present invention.
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.
Embodiment：
The present embodiment provides a kind of non-integer-period sampled method of the electric power signal of electric energy meter, as shown in figure 1, including following step
Suddenly：
Step S1, is sampled using input signal to electric power signal, wherein, electric power signal can be that voltage signal can also be
Current information, is set according to demand.
Step S2, measures the frequency of input signal and the frequency of electric power signal respectively, and measurement frequency can be using directly survey
The hair equal precision measurement of amount method, measuring period method, equally accurate frequency measurement and the vernier based on coincident circuit, the present embodiment is preferably using direct
The frequency P1 of the mensuration measurement input signal and frequency P2 of electric power signal.
Step S3, the frequency of frequency and electric power signal according to input signal calculates compensation rate value.
Step S4, is compensated using compensation value to the frequency of electric power signal.
The non-integer-period sampled method of the electric power signal of the electric energy meter that the present embodiment is provided, has efficiently accomplished electric power signal
Sampling in the case of frequency is inconsistent with the frequency of input signal to electric power signal, error is small, and the method for sampling and system are applicable model
Enclose wide, for the harmonic wave for accurately measuring electric energy meter provides a reliable precondition.
As a preferred embodiment of the invention, in step S3, the frequency of frequency and electric power signal according to input signal
Calculate compensation value method be：The frequency of input signal makees difference operation with the frequency of electric power signal, and the value for obtaining is compensation rate
Value, that is, compensate value P0=P1-P2.
As a preferred embodiment of the invention, in step S4, the frequency of electric power signal is mended using compensation value
The method repaid is：By the frequency of electric power signal plus compensation value, that is, the frequency of the electric power signal after being compensated, that is, hold
Row algorithm P2 '=P2+P0.
As a preferred embodiment of the invention, before being sampled to voltage signal using input signal, also include：Will
Input signal by voltage divider partial pressure, to stablize the voltage of input signal, wherein, voltage divider can be electric resistance partial pressure
Device.
On this basis, further, before being sampled to the electric power signal of electric energy meter using input signal, also wrap
Include：Input signal after pressing divider is transformed to the small-signal that mode converter can be recognized, in this way, input signal
Just the electric power signal of electric energy meter can be sampled.
In the present embodiment, input signal is first passed around into voltage divider summation current transformer, effective guarantee collection electricity
Can signal input signal voltage stabilization and can be recognized by analog-digital converter, improve electric energy meter electric power signal it is non-
The accuracy of sampling positive period.
Above-described embodiment is only intended to clearly illustrate example, and not to the restriction of implementation method.For institute
For the those of ordinary skill in category field, the change or change of other multi-forms can also be made on the basis of the above description
It is dynamic.There is no need and unable to be exhaustive to all of implementation method.And the obvious change or change thus extended out
Among moving still in the protection domain of the invention.
Claims (6)
1. a kind of non-integer-period sampled method of the electric power signal of electric energy meter, it is characterised in that comprise the following steps：
（1）Electric power signal is sampled using input signal；
（2）The frequency of input signal and the frequency of electric power signal are measured respectively；
（3）The frequency of frequency and electric power signal according to input signal calculates compensation rate value；
（4）The frequency of electric power signal is compensated with compensation value.
2. the non-integer-period sampled method of the electric power signal of electric energy meter according to claim 1, it is characterised in that the step
（3）Computational methods be：The frequency of input signal makees difference operation with the frequency of electric power signal, and the value for obtaining is compensation value.
3. the non-integer-period sampled method of the electric power signal of electric energy meter according to claim 1, it is characterised in that the step
（4）Method be：By the frequency of electric power signal plus compensation value, that is, the frequency of the electric power signal after being compensated.
4. the non-integer-period sampled method of the electric power signal of electric energy meter according to claim 1, it is characterised in that in the step
Suddenly（1）Before, input signal will also be by voltage divider partial pressure.
5. the non-integer-period sampled method of the electric power signal of electric energy meter according to claim 4, it is characterised in that in the step
Suddenly（1）Before, also the small letter that analog-digital converter can be recognized will be transformed to by the input signal after voltage divider partial pressure
Number.
6. according to claim 1-5 any one the electric power signal of electric energy meter non-integer-period sampled method, its feature exists
It is different from the frequency of the electric power signal in the frequency of input signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710172761.9A CN106771578A (en) | 2017-03-22 | 2017-03-22 | The non-integer-period sampled method of the electric power signal of electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710172761.9A CN106771578A (en) | 2017-03-22 | 2017-03-22 | The non-integer-period sampled method of the electric power signal of electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106771578A true CN106771578A (en) | 2017-05-31 |
Family
ID=58967802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710172761.9A Pending CN106771578A (en) | 2017-03-22 | 2017-03-22 | The non-integer-period sampled method of the electric power signal of electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106771578A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109959819A (en) * | 2017-12-26 | 2019-07-02 | 宁波三星医疗电气股份有限公司 | A kind of intelligent meter broadband reactive power error backoff algorithm and its intelligent meter |
| CN116754830A (en) * | 2023-06-13 | 2023-09-15 | 武汉阿迪克电子股份有限公司 | Metering method and device of electric energy meter and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101382588A (en) * | 2008-09-22 | 2009-03-11 | 慈溪伟吉电子有限公司 | Three phase harmonic standard electric energy meter |
| CN202256438U (en) * | 2011-08-02 | 2012-05-30 | 珠海中慧微电子有限公司 | Hardware real time clock (RTC) error compensation system of intelligent electric energy meter |
| CN104155517A (en) * | 2014-09-03 | 2014-11-19 | 国家电网公司 | Error compensation method and system for non-full period sampling of digital electric energy meter |
| CN106093842A (en) * | 2016-09-08 | 2016-11-09 | 国网辽宁省电力有限公司大连供电公司 | three phase harmonic standard electric energy meter |
-
2017
- 2017-03-22 CN CN201710172761.9A patent/CN106771578A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101382588A (en) * | 2008-09-22 | 2009-03-11 | 慈溪伟吉电子有限公司 | Three phase harmonic standard electric energy meter |
| CN202256438U (en) * | 2011-08-02 | 2012-05-30 | 珠海中慧微电子有限公司 | Hardware real time clock (RTC) error compensation system of intelligent electric energy meter |
| CN104155517A (en) * | 2014-09-03 | 2014-11-19 | 国家电网公司 | Error compensation method and system for non-full period sampling of digital electric energy meter |
| CN106093842A (en) * | 2016-09-08 | 2016-11-09 | 国网辽宁省电力有限公司大连供电公司 | three phase harmonic standard electric energy meter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109959819A (en) * | 2017-12-26 | 2019-07-02 | 宁波三星医疗电气股份有限公司 | A kind of intelligent meter broadband reactive power error backoff algorithm and its intelligent meter |
| CN116754830A (en) * | 2023-06-13 | 2023-09-15 | 武汉阿迪克电子股份有限公司 | Metering method and device of electric energy meter and storage medium |
| CN116754830B (en) * | 2023-06-13 | 2024-01-09 | 武汉阿迪克电子股份有限公司 | Metering method and device of electric energy meter and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106771645B (en) | Capacitance type potential transformer dielectric loss and capacitance on-line monitoring method and monitoring system | |
| CN208188313U (en) | A kind of electric energy meter calibrating apparatus with built-in monitoring base table | |
| CN102981049B (en) | Frequency detection method used for microgrid system | |
| CN102928810A (en) | System and method for evaluating accuracy of digital electric energy meter | |
| CN103809148B (en) | Method and system for measuring dynamic characteristics of electric energy meter | |
| CN210005677U (en) | Electric energy meter basic error testing device considering temperature and current change | |
| CN102809684B (en) | Power detection method and circuit for primary side circuit of power supply unit | |
| CN106771578A (en) | The non-integer-period sampled method of the electric power signal of electric energy meter | |
| CN209400684U (en) | A kind of voltage transformer wideband error measuring system | |
| CN103558571A (en) | Calibration system of electronic transformer and merging unit | |
| CN109406877B (en) | Method and device for measuring harmonic transmission coefficient of capacitor voltage transformer | |
| MT Ibraheem Al-Naib et al. | A Cost-Effective Method for Power Factor Metering Systems | |
| CN109581265B (en) | Method for detecting direct current resistance of current transformer based on power error | |
| Gallo et al. | On the Measurement of Power Electronic Devices' Frequency Coupling Admittance | |
| CN103353576B (en) | Based on the photovoltaic module energy output method of measurement of volt-ampere characteristic | |
| Bucci et al. | Development of a low cost power meter based on a digital signal controller | |
| CN106405465A (en) | Voltage transformer measurement error checking method | |
| CN109756186A (en) | A kind of test method that open air high-precision photovoltaic plant is detected and demarcated | |
| CN205193159U (en) | Dry -type air -core reactor loss detection device | |
| CN110471021A (en) | A kind of electric energy meter calibrating apparatus and method with built-in monitoring base table | |
| CN106771584A (en) | A kind of harmonic detecting method for being applied to power distribution network | |
| CN210051885U (en) | Electric energy data lossless digital direct current electric energy meter and field calibration system | |
| CN113702897A (en) | Anti-harmonic interference three-phase electric energy meter on-site calibration instrument | |
| CN106885941A (en) | Power network fundamental frequency detection method based on frequency spectrum extreme point | |
| CN114137470A (en) | Bandwidth testing device and measuring method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170531 |
|
| WD01 | Invention patent application deemed withdrawn after publication |