CN103149430A - Electric energy pulse implementing method of electric energy meter - Google Patents
Electric energy pulse implementing method of electric energy meter Download PDFInfo
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- CN103149430A CN103149430A CN2013100477603A CN201310047760A CN103149430A CN 103149430 A CN103149430 A CN 103149430A CN 2013100477603 A CN2013100477603 A CN 2013100477603A CN 201310047760 A CN201310047760 A CN 201310047760A CN 103149430 A CN103149430 A CN 103149430A
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Abstract
The invention relates to an electric energy pulse implementing method of an electric energy meter. The method is based on split-phase electric metering and slow time sharing communication, wherein the electric energy meter comprises a plurality of electric energy metering modules and a master control module. The method comprises the following steps of: accumulating electric energy by the electric energy metering modules with a system half cycle as a unit and reading primary data from the electric energy metering modules by the electric energy master control module with time T as a cycle to obtain electric energy increment in the metering module in time T; and refining the received electric energy increment in the electric energy master control module, dividing the electric energy increment and time T into N equal parts and accumulating the divided time and increment as well as comparing the result with the electric energy time constant, and sending electric energy pulse when the demand is met. With the adoption of the method, in the process of implementing the electric energy pulse, each electric energy metering module is respectively in time sharing communication with the master control module at intervals with time T as a cycle, so that the communicating rate is greatly reduced.
Description
Technical field
The present invention relates to a kind of electric energy metrical method of calibration, relate to especially a kind of electrical energy pulse implementation method.
Background technology
According to proposing " electric energy meter should possess LED pulse and the electric pulse function that is directly proportional to the institute consuming electric power " in the power industry standard DL/T614 of the People's Republic of China (PRC) 1 " multifunctional electric energy meter " 5.5.1.9.Here clearly proposing electric energy meter, should to possess the electric pulse output function be mainly because electric energy meter needs regularly to examine and determine himself by the electrical energy pulse output function, to guarantee the accuracy of its metering.
Electrical energy pulse is exported the error of electric energy meter and important impact is arranged, and has also directly affected the accuracy of measuring, and the accuracy of measuring is to weigh an extremely important factor of electric energy meter quality.Therefore, the electrical energy pulse output function has very very important meaning to electric energy meter.
For integrated electric energy meter, the smart circuit that integrated electric energy meter is in electric secondary circuit with original traditional three phases electronic energy meter is integrated on electric primary side high-voltage works.For the integrated electric energy meter with A, B, C three-phase, structurally A, B, C three-phase among are from independent.A phase electric energy metering module, C phase electric energy metering module, B phase electric energy top control module are integrated in respectively on the primary transmission line road of corresponding phase, current potential is identical with transmission line of electricity, realize electrical energy pulse so electric current, the voltage signal of three-phase can't be accessed special three-phase electrical energy computation chip together, can only adopt the method for phase-splitting metering.A phase, C adopt respectively independent electric energy computation chip metering electric flux separately mutually, then these energy informations isolates by optical fiber are transferred to B phase electric energy top control module and comprehensively add up, and finally export electrical energy pulse by the electric energy top control module.
Yet in order to satisfy the rapidity requirement of calibration, the ammeter meter constant is generally larger, and the electrical energy pulse output frequency is very fast.For integrated electric energy meter, need B phase electric energy top control module constantly to judge the instantaneous electric energy increment that obtains, see that whether reaching the corresponding electrical energy pulse of electrical energy pulse constant exports electric flux and produce electrical energy pulse.It is very short that this just requires A phase, C to complete respectively mutually time of electric energy metrical, also requirement is very fast with the speed that B phase electric energy top control module carries out optical fiber communication transmission electric energy information, therefore require the cpu performance of electric energy metering module and electric energy top control module very high, could satisfy metering and the communicating requirement of two-forty, the respective communication circuit also need to be according to requirement design at a high speed simultaneously, this has not only increased production cost, high-speed traffic has also brought the problem of communication reliability, has limited being widely used of product.
Summary of the invention
The present invention provides a kind of electrical energy pulse implementation method of electric energy meter in order to solve the problems of the technologies described above.This method is based on phase-splitting electricity metering and tdm communication at a slow speed, and wherein electric energy meter comprises a plurality of electric energy metering modules and top control module, and the method comprises the following steps:
A plurality of electric energy metering modules carry out electric energy and add up take system's half cycles as unit, the electric energy top control module reads a secondary data take time T as the cycle to the electric energy metering module electric energy, obtain the increment of the interior electric energy of each metering module in time T;
In the electric energy top control module, the electric energy increment that receives is carried out thinning processing, electric energy increment and time T are carried out the N decile, and with the time after decile with increment adds up and compare with the electric energy time constant, send electrical energy pulse when meeting the demands.
By adopting this method, in the electrical energy pulse implementation procedure, each electric energy metering module can top control module only carries out tdm communication by time cycle T interval with top control module respectively and gets final product, and has greatly reduced traffic rate.
Embodiment
The invention provides a kind of electrical energy pulse implementation method of electric energy meter, this method is based on phase-splitting electricity metering and tdm communication at a slow speed, and wherein electric energy meter comprises a plurality of electric energy metering modules and top control module, and the method comprises the following steps:
A plurality of electric energy metering modules carry out electric energy and add up take system's half cycles as unit, the electric energy top control module reads a secondary data take time T as the cycle to the electric energy metering module electric energy, obtain the increment of the interior electric energy of each metering module in time T;
In the electric energy top control module, the electric energy increment that receives is carried out thinning processing, electric energy increment and time T are carried out the N decile, and with the time after decile with increment adds up and compare with the electric energy time constant, send electrical energy pulse when meeting the demands, the burst length deviation after processing can be reduced into original l/N.
When adopting the time cycle to be the slow rate communication mode of T, namely a plurality of electric energy metering modules are respectively take time T as the cycle, measure separately that the backward electric energy top control module of electric flux sends, and carry out electric energy by the electric energy top control module and obtain this moment electric energy after comprehensive; When 0 moment, the electric flux that the electric energy top control module comprehensively comes from each metering module is 0, t1 is E1 constantly, Tn-1 is En-1 constantly, Tn is En constantly, and Tn+1 is En+1 constantly, considers simultaneously electric energy metering module and the requirement of electric energy top control module cpu performance, and improve the cumulative precision of electric energy in each period of time T, period of time T is carried out rational N decile.
Generally can adopt stable power supply during electric energy meter calibration, but affected by stability of power supply, in each period of time T, subtle change can occur in the electric energy increment, be electric energy increment △ En+1 and not exclusively equating in electric energy increment △ En and T n to Tn+1 period of time T in Tn-1 to Tn period of time T, in these two cycle T, the electric energy incremental difference is △ E.Therefore need to adjust the cumulative initial value of electric energy in each cycle T, each comprehensive electric energy of obtaining of all communicating mutually take the top control module place is as the initial value that adds up, and the 1/N of electric energy increment is as totalizing step in the last cycle T.For example in period of time T n to Tn+1, constantly communicate by letter the comprehensive electric energy En that immediately obtains as initial value take Tn, take the 1/N of △ En as totalizing step metering electric energy.
now suppose in period of time T n-1 to Tn, 1/N with last cycle electric energy increment △ En-1 successively adds up, when reaching a required electric flux of electrical energy pulse of ammeter meter constant, just sends cumulative electric energy electrical energy pulse, accumulated counts deducts and produces in theory an accumulated value that electrical energy pulse is required, the residue accumulated value carries out next time again, and electric energy adds up, if again send electrical energy pulse when arriving required electric flux, until completing, this period of time T arrives Tn during the moment like this, the electric energy top control module communicates again with each phase electric energy metering module, reception is comprehensively also En from the electric energy of each phase, at this moment in Tn to Tn+1 period of time T, make the cumulative initial value take En as electric energy into, 1/N with electric energy increment △ En successively adds up, when reaching a required electric flux of electrical energy pulse of ammeter meter constant, sends cumulative electric energy electrical energy pulse, the electric energy that carries out again next time is cumulative, by that analogy, thereby realize the electrical energy pulse output of high-voltage electric energy meter.
But in actual implementation procedure, must consider the impact of stability of power supply and the time error that above-mentioned implementation method is brought, namely actual generation electrical energy pulse time and theory produce the error of electrical energy pulse time, if this time error is larger, must can produce larger deviation when electrical energy meter calibration, thereby affect the accuracy of measuring of electric energy meter.
Claims (1)
1. the electrical energy pulse implementation method of an electric energy meter, this method is based on phase-splitting electricity metering and tdm communication at a slow speed, wherein electric energy meter comprises a plurality of electric energy metering modules and top control module, the method comprises the following steps: that a plurality of electric energy metering modules carry out electric energy and add up take system's half cycles as unit, the electric energy top control module reads a secondary data take time T as the cycle to the electric energy metering module electric energy, obtains the increment of the interior electric energy of each metering module in time T, in the electric energy top control module, the electric energy increment that receives is carried out thinning processing, electric energy increment and time T are carried out the N decile, and with the time after decile with increment adds up and compare with the electric energy time constant, send electrical energy pulse when meeting the demands, the burst length deviation after processing can be reduced into original l/N, when adopting the time cycle to be the slow rate communication mode of T, namely a plurality of electric energy metering modules are respectively take time T as the cycle, measure separately that the backward electric energy top control module of electric flux sends, and carry out electric energy by the electric energy top control module and obtain this moment electric energy after comprehensive, when 0 moment, the electric flux that the electric energy top control module comprehensively comes from each metering module is 0, t1 is E1 constantly, Tn-1 is En-1 constantly, Tn is En constantly, and Tn+1 is En+1 constantly, considers simultaneously electric energy metering module and the requirement of electric energy top control module cpu performance, and improve the cumulative precision of electric energy in each period of time T, period of time T is carried out rational N decile, when stability of power supply is poor, in each period of time T, subtle change can occur in the electric energy increment, be electric energy increment △ En+1 and not exclusively equating in electric energy increment △ En and T n to Tn+1 period of time T in Tn-1 to Tn period of time T, in these two cycle T, the electric energy incremental difference is △ E, need the cumulative initial value of electric energy in each cycle T is adjusted, each comprehensive electric energy of obtaining of all communicating mutually take the top control module place is as the initial value that adds up, and the 1/N of electric energy increment is as totalizing step in the last cycle T, suppose in period of time T n-1 to Tn, 1/N with last cycle electric energy increment △ En-1 successively adds up, when reaching a required electric flux of electrical energy pulse of ammeter meter constant, just sends cumulative electric energy electrical energy pulse, accumulated counts deducts and produces in theory an accumulated value that electrical energy pulse is required, the residue accumulated value carries out next time again, and electric energy adds up, if again send electrical energy pulse when arriving required electric flux, until completing, this period of time T arrives Tn during the moment like this, the electric energy top control module communicates again with each phase electric energy metering module, reception is comprehensively also En from the electric energy of each phase, at this moment in Tn to Tn+1 period of time T, make the cumulative initial value take En as electric energy into, 1/N with electric energy increment △ En successively adds up, when reaching a required electric flux of electrical energy pulse of ammeter meter constant, sends cumulative electric energy electrical energy pulse, the electric energy that carries out again next time is cumulative, by that analogy, thereby realize the electrical energy pulse output of high-voltage electric energy meter.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103823110A (en) * | 2014-03-07 | 2014-05-28 | 深圳市思达仪表有限公司 | Method for generating pulses by double manganin sampling circuits of single-phase three-wire electric energy meter |
| CN104459413A (en) * | 2014-12-17 | 2015-03-25 | 朱明� | Multi-loop electricity monitoring device capable of achieving intelligent household electricity utilization management |
| CN105785309A (en) * | 2015-03-26 | 2016-07-20 | 上海斯同瑞电气科技有限公司 | Apparatus for setting electric energy meter pulse width and setting method thereof |
| CN112748271A (en) * | 2020-12-01 | 2021-05-04 | 宁波三星医疗电气股份有限公司 | Electric energy meter and electric quantity metering method thereof |
| CN115932711A (en) * | 2023-03-10 | 2023-04-07 | 杭州炬华科技股份有限公司 | Data processing method, device and medium for electric energy meter measurement reliability |
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| CN103823110A (en) * | 2014-03-07 | 2014-05-28 | 深圳市思达仪表有限公司 | Method for generating pulses by double manganin sampling circuits of single-phase three-wire electric energy meter |
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| CN105785309A (en) * | 2015-03-26 | 2016-07-20 | 上海斯同瑞电气科技有限公司 | Apparatus for setting electric energy meter pulse width and setting method thereof |
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| CN112748271A (en) * | 2020-12-01 | 2021-05-04 | 宁波三星医疗电气股份有限公司 | Electric energy meter and electric quantity metering method thereof |
| CN115932711A (en) * | 2023-03-10 | 2023-04-07 | 杭州炬华科技股份有限公司 | Data processing method, device and medium for electric energy meter measurement reliability |
| CN115932711B (en) * | 2023-03-10 | 2023-07-07 | 杭州炬华科技股份有限公司 | Data processing method, device and medium for metering reliability of electric energy meter |
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