CN100348984C - Electric energy metrical pulse generation method for ammeter - Google Patents
Electric energy metrical pulse generation method for ammeter Download PDFInfo
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- CN100348984C CN100348984C CNB2006100018320A CN200610001832A CN100348984C CN 100348984 C CN100348984 C CN 100348984C CN B2006100018320 A CNB2006100018320 A CN B2006100018320A CN 200610001832 A CN200610001832 A CN 200610001832A CN 100348984 C CN100348984 C CN 100348984C
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Abstract
The present invention relates to an electric energy metering pulse generation method for an ammeter, which belongs to the technical field of electric power parameter measurement. Firstly, zero crossing detection is carried out on a voltage signal, and the detection result is used for controlling the calculation on periodical energy and the increment of the electric energy at the current point. When a new zero crossing point is detected each time, the energy of the previous period is added to the electric energy surplus, and the average power of the period is calculated, so that the electric energy surplus at the current point in the current period is linearly predicted. When the electric energy surplus goes beyond an electric energy value corresponding to electric energy metering pulse each time, electric energy metering pulse is output, and simultaneously an electric energy value corresponding to the electric energy metering pulse is deducted from the electric energy surplus. The method of the present invention has the advantages of good real time property, sensitive response on load power variance and small hysteresis quality. The algorithm can be realized only by simple accumulating calculation, the amount of calculation is smaller, and the periodical cumulative error can not be generated.
Description
Technical field
The present invention relates to a kind of production method that is used for the electric energy metrical pulse of ammeter, belong to the electric parameter measurement technical field.
Background technology
Electronic metering process commonly used can be described as:
1, by analog to digital converter respectively to carrying out analog to digital conversion from voltage signal v (t) on the line of electric force and current signal i (t), obtain corresponding digitized result v (j) and i (j);
2, v (j) and i (j) are multiplied each other obtain instantaneous power p (j);
3, by certain power to the conversion method of electric energy metrical pulse, with above-mentioned steps 2) the instantaneous power sequence p (j) that obtains is converted to the pulse signal output of certain frequency.
The pulse signal of output is used for the calibration and the electric energy metrical (as direct driving pulse motor) of ammeter in the above-mentioned steps 3.For calibration, require under stable loading condition usually, the frequency of the pulse signal of being exported is stable, otherwise can bring error to calibration, thereby reduces the precision of metering.This means that the power in the above-mentioned steps 3 is not only wanted the pulse signal of output frequency and the linear ratio of power to the conversion of electric energy metrical pulse, and will satisfy under stable power, output uniform pulse signal of recurrent interval.
Obviously, the conversion accuracy between from power to the electric energy metrical pulse will directly determine the measuring accuracy of ammeter, therefore, selects the conversion method of suitable power to electric energy metrical pulse, and is most important to the design of ammeter.The generation method of existing electric energy metrical pulse, its principle be as shown in Figure 1:
1, respectively to carrying out analog to digital conversion from voltage signal v (t) on the line of electric force and current signal i (t), obtain digitized v (j) and i (j), v (j) and i (j) are multiplied each other obtains instantaneous power p (j);
2, instantaneous power p (j) is carried out low-pass filtering, obtain the less power P of ripple (j);
3, by " numeral is to frequency inverted " P (j) is converted to the output pulse;
The above-mentioned ripple that at first reduces power by low-pass filtering then is transformed into the method for frequency, and its purpose is under stable loading condition, output uniform pulse signal of recurrent interval, thus satisfy the requirement of calibration.Obviously, in order to improve the degree of uniformity of output pulse, just must improve low-pass filter effect, promptly reduce the bandwidth of wave filter and the exponent number of raising wave filter, yet low filter bandwidht can make when actual bearing power changes, the response that the metrical pulse of output changes thereupon is slack-off, high filter order can make the calculating quantitative change big, and perhaps circuit expense when hardware is realized becomes big, and the two is the problem that existing electric energy metrical pulse production method exists.
Summary of the invention
The objective of the invention is to propose a kind of production method that is used for the electric energy metrical pulse of ammeter, with the electric power signal cycle serves as to handle unit, come the electric energy and the output pulse signal in view of the above of linear prediction current time by calculating to the cycle average power, so that electric energy metrical pulse output is little to the response speed of load variations calculated amount fast, that algorithm is realized, perhaps expense is little when circuit hardware is realized.
The production method of the electric energy metrical pulse that is used for ammeter that the present invention proposes may further comprise the steps:
(1) respectively to carrying out analog to digital conversion from voltage signal v (j) on the line of electric force and current signal i (j), obtain digitized v (j) and i (j), digitizing v (j) and i (j) multiplied each other obtains instantaneous power p (j), and voltage signal v (j) is carried out detecting to positive zero crossing from negative;
(2) virtual electric energy container of definition is " energy pail ", be used to deposit the surplus between electric energy that the user consumed and the electric energy that has been converted to metrical pulse output, if Eo is the electric energy in " energy pail ", when detecting the 1st zero crossing, make Eo=0;
(3) when detecting a new zero crossing, calculate the electric energy Ep in last cycle, promptly by the adding up of the instantaneous power p (j) of last zero crossing to each sampled point the current zero crossing, and the electric energy in last cycle is put in " energy pail ": Eo=Eo+Ep;
(4) calculate average power: Pa=Ep/M according to the electric energy Ep in above-mentioned last cycle, wherein M represents that one-period with electric power signal is divided into M unit interval and carries out electric energy and predict;
(5) establishing ek is current time electric energy incremental forecasting value in current period, ef is the electric energy surplus predicted value of current time in current period, Et is and the corresponding energy value of electric energy metrical pulse, so at the beginning at current period, promptly the 0th unit interval end point, make ek=0, ef=Eo, and electric energy surplus predicted value ef and energy value Et compared, when ef 〉=Et, then export an electric energy metrical pulse, simultaneously the pairing energy value of electric energy metrical pulse: Eo=Eo-Et of deduction from " energy pail ";
(6) every new unit interval end point, make ek=ek+Pa, ef=ek+Eo, and electric energy surplus predicted value ef and the pairing energy value Et of electric energy metrical pulse compared, when ef 〉=Et, then export an electric energy metrical pulse, simultaneously the pairing energy value of electric energy metrical pulse: Eo=Eo-Et of deduction from " energy pail ";
(7) repeat above-mentioned steps (6) and finish up to current period, promptly a new v (j) zero crossing arrives;
(8) repeat above-mentioned (3)～(7), export electric energy metrical pulse in real time.
The production method of the electric energy metrical pulse that is used for ammeter that the present invention proposes, its core content is to serve as to handle unit with the electric power signal cycle, the average power of one-period before the calculating current time, with it average power estimated value as current period, come the energy value of linear prediction current time, and export electric energy metrical pulse in real time in view of the above.The inventive method has the following advantages:
1, real-time is good: directly adopt the energy value with a current time electric energy and an electric energy metrical pulse representative to compare the method that produces electric energy metrical pulse, rather than low-pass filtering adds the method for numeral to frequency inverted in the existing method of employing, and therefore response sensitivity, the hysteresis quality to the bearing power variation is little.
2, algorithm realizes that calculated amount is less: from the conversion of instantaneous frequency electric energy metrical pulse to the end, low-pass filter in the existing method needs more multiplication and additive operation, and the method that the present invention proposes only needs simple accumulating operation, for the division arithmetic in the above-mentioned steps (4), can be 2 integral number power with denominator M value, as 64,128,256 etc., division arithmetic can be realized with simple displacement break-in operation like this.
3, no periodic cumulative errors: the actual power accumulated value when always beginning with current period owing to the electric energy linear prediction to current period is as its initial value, therefore do not have the cumulative errors between the cycle, promptly can not carrying out and worsen with metering to the electric energy precision of prediction of current time.
Description of drawings
Fig. 1 is the production method schematic diagram of existing electric energy metrical pulse.
Fig. 2 is the theory diagram of the electric energy metrical pulse method of the inventive method proposition.
Embodiment
The production method of the electric energy metrical pulse that is used for ammeter that the present invention proposes, its theory diagram as shown in Figure 2, at first respectively to carrying out analog to digital conversion from voltage signal v (j) on the line of electric force and current signal i (j), obtain digitized v (j) and i (j), v (j) and i (j) multiplied each other obtains instantaneous power p (j), and voltage signal v (j) is carried out detecting to positive zero crossing from negative; Defining a virtual electric energy container is " energy pail ", be used to deposit the surplus between electric energy that the user consumed and the electric energy that has been converted to metrical pulse output, wherein, the electric energy that the user consumes is to put in the time interval in " energy pail " with the electric power signal cycle, and when electric energy metrical pulse was exported, then pairing energy value of electric energy metrical pulse of deduction from " energy pail " was established Eo and is the electric energy in " energy pail ", when detecting the 1st zero crossing, make Eo=0; When detecting a new zero crossing, calculate the electric energy Ep in last cycle, promptly by the adding up of the instantaneous power p (j) of last zero crossing to each sampled point the current zero crossing, and the electric energy in last cycle is put in " energy pail ": Eo=Eo+Ep; Calculate average power: Pa=Ep/M according to the electric energy Ep in last cycle, wherein M represents that one-period with electric power signal is divided into M unit interval and carries out electric energy and predict; If ek is current time electric energy incremental forecasting value in current period, ef is the electric energy surplus predicted value of current time, so at the beginning at current period, promptly, make ek=0, ef=Eo the 0th unit interval end point, and electric energy surplus predicted value ef and the pairing energy value Et of electric energy metrical pulse compared, when ef 〉=Et, then export an electric energy metrical pulse, simultaneously the pairing energy value of electric energy metrical pulse: Eo=Eo-Et of deduction from " energy pail "; Every new unit interval end point, make ek=ek+Pa, ef=ek+Eo, and electric energy surplus predicted value ef and the pairing energy value Et of electric energy metrical pulse compared, when ef 〉=Et, then export an electric energy metrical pulse, simultaneously the pairing energy value of electric energy metrical pulse: Eo=Eo-Et of deduction from " energy pail "; Successively the electric energy on each unit interval end point in the current period is predicted with pulse and is judged output that finish up to current period, promptly a new v (j) zero crossing arrives; Repeat above process, export electric energy metrical pulse F1 in real time.
Among Fig. 2, ck1 is the analog-to-digital Nyquist equivalent sampling clock that carries out to electric power signal v (t) and i (t), in general, the frequency of ck1 be taken as electric power signal fundamental frequency 2 integral number power doubly, for example, the fundamental frequency of electric power signal is 50Hz, and the frequency of ck1 is taken as 12.8kHz; Ck2 is the clock that energy predicting is carried out in control in the current period, its frequency is relevant with M, M represents that the one-period with electric power signal is divided into the M section and carries out the electric energy prediction, as previously mentioned, for making division be easy to realize, the value of M generally is taken as 2 integral number power, therefore, the frequency of ck2 also be the electric power signal fundamental frequency 2 integral number power doubly, usually, can make the frequency of ck2 equal the frequency of ck1, i.e. the shared same clock of ck1 and ck2 is if will further improve the uniformity coefficient of the electric energy metrical pulse of ammeter output, can increase M, promptly increase the clock frequency of ck2, make its be the ck1 frequency 2 integral number power doubly, to improve the temporal analytical density of electrical energy pulse output; S is for carrying out the output after the zero passage detection to signal v (j), promptly whenever v (j) from negative during to decent zero crossing, in its zero crossing position a pulse signal is arranged accordingly, the effect of s is to give two summation circuits that reset among Fig. 2 as reset signal, is used for asking periodical energy Ep to ask the process of current period electric energy incremental forecasting value ek to carry out periodic initialization with adding up to adding up; Pa is the average power in last cycle, and its value equals Ep/M, and the general value of denominator M is 2 integral number power, as 64,128, and 256 etc., division arithmetic can be realized with simple displacement break-in operation like this.
Claims (1)
1, a kind of production method that is used for the electric energy metrical pulse of ammeter is characterized in that this method may further comprise the steps:
(1) respectively to carrying out analog to digital conversion from voltage signal v (j) on the line of electric force and current signal i (j), obtain digitized v (j) and i (j), digitized v (j) and i (j) multiplied each other obtains instantaneous power p (j), and voltage signal v (j) is carried out detecting to positive zero crossing from negative;
(2) virtual electric energy container of definition is " energy pail ", be used to deposit the surplus between electric energy that the user consumed and the electric energy that has been converted to metrical pulse output, if Eo is the electric energy in " energy pail ", when detecting the 1st zero crossing, make Eo=0;
(3) when detecting a new zero crossing, calculate the electric energy Ep in last cycle, promptly by the adding up of the instantaneous power p (j) of last zero crossing to each sampled point the current zero crossing, and the electric energy in last cycle is put in " energy pail ": Eo=Eo+Ep;
(4) calculate average power: Pa=Ep/M according to the electric energy Ep in above-mentioned last cycle, wherein M represents that one-period with electric power signal is divided into M unit interval and carries out electric energy and predict;
(5) establishing ek is current time electric energy incremental forecasting value in current period, ef is the electric energy surplus predicted value of current time in current period, Et is and the corresponding energy value of electric energy metrical pulse, the 0th unit interval end point, make ek=0, ef=Eo, and electric energy surplus predicted value ef and energy value Et compared, when ef 〉=Et, then export an electric energy metrical pulse, simultaneously the pairing energy value of electric energy metrical pulse: Eo=Eo-Et of deduction from " energy pail ";
(6) every new unit interval end point, make ek=ek+Pa, ef=ek+Eo, and electric energy surplus predicted value ef and the pairing energy value Et of electric energy metrical pulse compared, when ef 〉=Et, then export an electric energy metrical pulse, simultaneously the pairing energy value of electric energy metrical pulse: Eo=Eo-Et of deduction from " energy pail ";
(7) repeat above-mentioned steps (6) and finish up to current period, promptly a new v (j) zero crossing arrives;
(8) repeat above-mentioned (3)～(7), export electric energy metrical pulse in real time.
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| CN110927656B (en) * | 2019-12-16 | 2022-10-28 | 深圳供电局有限公司 | Electric energy meter error measuring device and control method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1986003301A1 (en) * | 1984-11-20 | 1986-06-05 | Tee A/S Total Electronic Enterprise | A static, electric apparatus for measuring power and energy drawn from a power supply network |
| CN1050093A (en) * | 1990-10-20 | 1991-03-20 | 彭飞 | Watt-hour meter timesharing meter, readout instrument |
| CN2321009Y (en) * | 1997-09-02 | 1999-05-26 | 揭阳市恒星工业有限公司 | Electronic single-phase electric energy meter |
| CN1415075A (en) * | 2000-10-06 | 2003-04-30 | 三菱电机株式会社 | Electronic watt-hour meter |
-
2006
- 2006-01-24 CN CNB2006100018320A patent/CN100348984C/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1986003301A1 (en) * | 1984-11-20 | 1986-06-05 | Tee A/S Total Electronic Enterprise | A static, electric apparatus for measuring power and energy drawn from a power supply network |
| CN1050093A (en) * | 1990-10-20 | 1991-03-20 | 彭飞 | Watt-hour meter timesharing meter, readout instrument |
| CN2321009Y (en) * | 1997-09-02 | 1999-05-26 | 揭阳市恒星工业有限公司 | Electronic single-phase electric energy meter |
| CN1415075A (en) * | 2000-10-06 | 2003-04-30 | 三菱电机株式会社 | Electronic watt-hour meter |
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