CN102721862B - Method for reducing electric energy pulse jitter - Google Patents
Method for reducing electric energy pulse jitter Download PDFInfo
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- CN102721862B CN102721862B CN201210162974.0A CN201210162974A CN102721862B CN 102721862 B CN102721862 B CN 102721862B CN 201210162974 A CN201210162974 A CN 201210162974A CN 102721862 B CN102721862 B CN 102721862B
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Abstract
The invention relates to the field of electronic electric energy meters and discloses a method for reducing electric energy pulse jitter. The method comprises the following steps of: jumping from a certain state to another state according to different conditions, or keeping the electric energy pulse in a current state, driving a pulse generator through a power source corresponding to the state, and accumulating an electric energy metering pulse value. By the method, the problems that reading jitter is easily caused when the pulse generator is driven by instantaneous power and the pulse metering electric energy is accumulated in the conventional electronic electric energy meter and that the reading is lagged and even wrong because the pulse generator is driven by an average value of active power and the pulse metering electric energy is accumulated are solved, and the reading accuracy is greatly improved under the condition that the change cost is low.
Description
Technical field
The present invention relates to electronic electric energy meter field, relate in particular to a kind of method that electrical energy pulse is beated that reduces.
Background technology
China's intelligent grid fast development in recent years, the market share amount of electronic electric energy meter constantly expands, and has become main flow electric energy meter way of realization.The develop rapidly of science and technology, the mankind are also more and more higher for the requirement of material, thereby also when the river rises the boat goes up to the accuracy requirement of this elementary cell of electric energy metrical, from the concept such as " wide dynamic range ", " dynamic load " that starts in the industry recently to praise highly, can know something about.Final make manufacturer that more energy is placed on and pursues multi-functionally to obtain more favors of consumer, such as the electronic electric energy meter of harmonic wave metering, the function such as anti-electricity-theft, on the contrary the basic implementation of electronic electric energy meter is not done to more improvement.Current implementation has become a kind of classical mode of electric energy metrical, as shown in the electric energy metrical block diagram of Fig. 1 classics.
First the Computing Principle of the basic active energy that once Fig. 1 represents is described.Ua in figure (t) and ia (t) represent voltage actual on electrical network, the analog sample voltage of electric current after sensor conversion, through analog to digital converter ADC sample quantization and digital signal u (t) and i (t), on waveform, be the sine wave taking power frequency (Chinese as 50Hz) as the cycle.For obtaining electric energy, u (t) and i (t) signal multiplication, low-pass filtering link, obtain instantaneous digital power stream p (t), the power consumption speed of respective user in amplitude.From here on, on the one hand p (t) multiple spot obtains active power after being averaged, and p (t) is sent to pulse producer and removes accumulation active energy and send pulse on the other hand.
Here ku, ki correspondence the gain on signal transmission path, rated output:
For simplicity, note k=ku*ki/2, filtering and average after:
Active power
Can find out from above formula, electric energy is to instantaneous power integration in time, quantizing in calculating, constantly evenly cumulative with the speed of sampling rate (or faster), measures the electric energy at a period of time internal consumption.Electric energy output characterizes with electric energy correction pulse CF (Calibrate Frequency) conventionally, the relation of CF and standard unit's kilowatt hour (being also called " degree "), described by table constant EC (Electric meter Constant), the physical significance of EC is the corresponding umber of pulse of every consumption 1 kilowatt hour of this electric energy meter (1kWh) electric energy.Relation between them is by equation expression below, and m is illustrated in the counted number of pulses (say accurately, may contain fraction part) of measuring in certain a period of time.
From above-mentioned explanation, can find out, the key point of electric energy metrical is just in this link of pulse producer, and ultimate principle is overflowed realization by cumulative, for the data source of sending into, intuitively, mainly contains two kinds of selections.One, directly uses instantaneous power p (t) to do cumulative, and shortcoming is: while using little current loading, electric energy meter precision easily occurs and beats; They are two years old, p (t) is carried out a period of time to the buffering in (as 1 second), with buffering mean value go drive-pulse generator to send pulse, shortcoming is: the switching for load can produce hysteresis, even some complicated applications occasion can exist pulse-losing may.Obviously, all there is certain defect in these two kinds of main stream approach.
Summary of the invention
The object of the embodiment of the present invention is: a kind of method that electrical energy pulse is beated that reduces is provided, is not changing under the prerequisite of electronic electric energy meter hardware, make the reading of electronic electric energy meter more accurate.
The embodiment of the present invention provides a kind ofly reduces the method that electrical energy pulse is beated, and comprises the steps:
Set one of four states according to the power source of driving pulse: Pinst state, Pwr state, Pavg state and Pnow state;
, or be retained under current state from a certain state transition to another state according to different conditions, the power source corresponding with state removes drive-pulse generator, cumulative electric energy metrical pulse value.
Optionally, described Pinst represents instantaneous power; Described Pwr be the M of described Pinst order average; Described Pavg is that the N point of Pwr is average; Described Pnow is the power source of trigger pulse instantly.
Optionally, according to different conditions from a certain state transition to or to be retained in corresponding state concrete condition as follows:
Wherein r1: for Pwr is with respect to the variation ratio of Pnow, i.e. r1=| (Pwr/Pnow)-1|*100%;
R2: for Pavg is with respect to the variation ratio of Pnow, i.e. r2=| (Pavg/Pnow)-1|*100%;
I, current be Pinst state-driven pulse producer summation pulse:
(1) as current effective value Irms>=current threshold I
0, be retained in current Pinst state-driven pulse producer summation pulse;
(2) as current effective value Irms < current threshold I
0, jump to Pwr state-driven pulse producer summation pulse.
II, current be Pwr state-driven pulse producer summation pulse:
(1) as current effective value Irms>=current threshold I
0, jump to Pinst state-driven pulse producer summation pulse;
(2), as r1 >=dead band ratio p%, be retained in current Pwr state-driven pulse producer summation pulse;
(3) as r1 < dead band ratio p%, and r2 < p%, jump to Pavg state-driven pulse producer summation pulse.
III, current be Pavg state-driven pulse producer summation pulse:
(1) as current effective value Irms>=I
0, jump to Pinst state-driven pulse producer summation pulse;
(2), as r1 >=dynamic proportion q%, jump to Pwr state-driven pulse producer summation pulse;
(3), as r2 >=dead band ratio p%, be retained in Pavg state-driven pulse producer summation pulse;
(4), as r2 < dead band ratio p%, jump to Pnow state-driven pulse producer summation pulse.
IV, current be Pnow state-driven pulse producer summation pulse:
(1) as current effective value Irms>=current threshold I
0, jump to Pinst state-driven pulse producer summation pulse;
(2), as r1 >=dynamic proportion q%, jump to Pwr state-driven pulse producer summation pulse;
(3), as r2 < dead band ratio p%, be retained in Pnow state-driven pulse producer summation pulse;
(4), as r2 >=dead band ratio p%, jump to Pavg state-driven pulse producer summation pulse.
Optionally, described current threshold I
0be used for doing the fixing little electric current of staging treating, wherein said current threshold I
0for n% times of fundamental current Ib, and 1%≤n%≤10%, i.e. I
0=n%*Ib.
Optionally, described multiple n% is 1%.
Optionally, the scope of described dead band ratio p% and described dead band ratio q% is: 0.5%≤p%≤2%, 3%≤q%≤8%.
Optionally, described dead band ratio p% is 1%, and described dynamic proportion q% is 5%.
Optionally, the exponential that described M, N are 2.
Optionally, described M is 1024, and described N is 16.
Therefore, the technical scheme of the application embodiment of the present invention, the subject matter solving is: (1) existing electronic electric energy meter uses instantaneous power drive-pulse generator summation pulse, then during according to pulse measurement electric energy after cumulative, if what user load end used is little current loading, easily there is the phenomenon that reading is beated, cause the read untrue of electronic electric energy meter; (2) existing electronic electric energy meter uses the mean value drive-pulse generator summation pulse of active power, then while measuring electric energy according to the pulsed drive after cumulative, if user load end generation large current load switching, the reading of electronic electric energy meter there will be hysteresis, in some complicated applications occasion, also the possibility of possibility pulse-losing, finally causes the complete mistake of reading.
For above-mentioned two kinds of problems, one of the present invention reduces the electrical energy pulse method of beating, not change under the prerequisite of existing electronic electric energy meter internal hardware, only the power that drives its inner pulse producer is carried out to appropriateness selection, can meet user side and use little current loading time, reduce the reading large problem of amplitude of beating, user side can not occur yet use large current load time, reading lags behind or wrong phenomenon.Therefore, in the time solving above-mentioned two problem, first need clearly above-mentioned two problems are whether the load using for different user end is large electric current or the situation of little electric current, thereby introduce current threshold I
0as critical point, be defined as the n% (1%≤n%≤10%) of fundamental current Ib doubly, i.e. I
0=n%*Ib, and then further go to determine and select any power to go to drive described pulse producer summation pulse to measure.Now be provided with four kinds of states, distinguish with the power source of driving pulse, be respectively Pinst state, Pwr state, Pavg state and Pnow state, wherein Pinst is instantaneous power value; Pwr be the M of Pinst order average; Pavg is that the N point of Pwr is average; Pnow is the power source of trigger pulse instantly.The power of these four kinds of states can drive described pulse producer summation pulse, and just condition is separately different.In described four kinds of states, under the most applicable state, drive described pulse producer summation pulse in order to jump to or to be retained in, need default condition separately, from and to introduce following parameter: r1 be the variation ratio of Pwr with respect to Pnow, i.e. r1=| (Pwr/Pnow)-1|*100%; R2 is the variation ratio of Pavg with respect to Pnow, i.e. r2=| (Pavg/Pnow)-1|*100%; P% is dead band ratio, and q% is dynamic proportion; Wherein, described dead band ratio p% sets for distinguishing the curent change that the whether little current loading of user load end or external interference cause, whether described dynamic proportion q% is used for distinguishing user load end has little current loading change and set, and the state of actual conditions and correspondence is as follows:
Be Pinst state-driven pulse producer summation pulse if current, if (1) current effective value Irms>=current threshold I
0, show that user load end is operated between larger Current Zone, be retained in current Pinst state-driven pulse producer summation pulse; In addition, if (2) current effective value Irms < current threshold I
0, show that user load end is operated between little Current Zone, jump to Pwr state-driven pulse producer summation pulse.
Be Pwr state-driven pulse producer summation pulse if current, if (1) current effective value Irms>=current threshold I
0, show that user load end is operated between larger Current Zone, jump to Pinst state-driven pulse producer summation pulse; In addition, if (2) r1>=dead band ratio p%, because r1 is the variation ratio of Pwr with respect to Pnow, upgrades with Pwr speed, there is large variation in the power that shows the little current loading of user load end use, is retained in current Pwr state-driven pulse producer summation pulse; In addition, if (3) r1 < dead band ratio p%, and r2 < dead band ratio p%, r2 is the variation ratio of Pavg with respect to Pnow, speed with Pavg is upgraded, the power that shows the little current loading that user load end uses changes little, and the Pavg after average with Pwr measures more steady, jumps to Pavg state-driven pulse producer summation pulse.
Be Pavg state-driven pulse producer summation pulse if current, if (1) current effective value Irms>=current threshold I
0, show that user load end is operated between larger Current Zone, jump to Pinst state-driven pulse producer summation pulse; In addition,, if (2) r1>=dynamic proportion q% shows that large variation has occurred the power of the little current loading of user load end use, jump to Pwr state-driven pulse producer summation pulse; In addition, if (3) r2>=dead band ratio p% shows that little variation has occurred the little current loading power that user load end uses, and is retained in Pavg state-driven pulse producer summation pulse; In addition, if (4) r2 < dead band ratio p%, the power that shows the little current loading that user load end uses changes too small, or the curent change being caused by external interference noise completely, jumps to Pnow state-driven pulse producer summation pulse.
Be Pnow state-driven pulse producer summation pulse if current, if (1) current effective value Irms>=current threshold I
0, show that user load end is operated between larger Current Zone, jump to Pinst state-driven pulse producer summation pulse; In addition,, if (2) r1>=dynamic proportion q% shows that large variation has occurred the power of the little current loading of user load end, jump to Pwr state-driven pulse producer summation pulse; In addition, if (3) r2 < dead band ratio p%, the power that shows the little current loading of user load end use does not change, but the curent change that external interference noise causes is retained in Pnow state-driven pulse producer summation pulse; In addition,, if (4) r2>=dead band ratio p% shows that little variation has occurred the power of the little current loading of user load end use, jump to Pavg state-driven pulse producer summation pulse.
Can find out from the conversion of above-mentioned four kinds of states, under each state, condition is all to carry out redirect or reservation according to (1), (2), (3), (4) priority orders from high to low, if in actual use, the condition occurring does not all meet above-mentioned listed situation, is just retained in current state.
Brief description of the drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms the application's a part, does not form to improper restriction of the present utility model, in the accompanying drawings:
The classical electric energy metrical block diagram of Fig. 1 for providing in background technology of the present invention;
Fig. 2 is that a kind of described in the embodiment of the present invention reduces the constitutional diagram that electrical energy pulse is beated in method.
Embodiment
Describe the present invention in detail below in conjunction with accompanying drawing and specific embodiment, be used for explaining the present invention in this illustrative examples of the present invention and explanation, but not as a limitation of the invention.
Embodiment 1:
A kind of electrical energy pulse method of beating that reduces of the present invention, concrete technical scheme is as follows, analyzes in conjunction with the constitutional diagram of Fig. 2 simultaneously, more simple and clear.
First, as can be seen from Figure 2, have one of four states Pinst state, Pwr state, Pavg state and Pnow state, wherein, Pinst is instantaneous power value; Pwr is order with the M of Pinst average, and M is 2 exponential, is the realization in order to facilitate hardware, finally can be cost-saving; Pavg is average to the N point of Pwr, and N is also 2 exponential, same in order to facilitate the realization of hardware, cost-saving; Pnow is the power source for trigger pulse instantly, just to distinguishing above three kinds and definition.Why there are this four kinds of states, exactly in order to solve existing electronic electric energy meter in real process, do cumulative driving pulse source for direct use instantaneous power, can cause in the time using little current loading, the easy appearance of electronic electric energy meter is significantly beated, and causes read untrue; Do driving pulse source for the mean value in direct employing a period of time, can make again the hysteresis of beating of electronic electric energy meter, if in the application scenario of some circuit complexity, also may there is wrong reading, so, just set out this four kinds of states, to avoid the appearance of above-mentioned two kinds of problems.
Then, Fig. 2 is seen from top to bottom, for Pinst state, can see and have respectively four arrow points self, simultaneously on these four arrows, also mark has corresponding condition, i.e. explanation, must be met after certain condition during to Pinst state by other three kinds of state transitions respectively, just can, meanwhile, Pinst state, in the time maintaining oneself state, also must meet certain condition, but no matter be by any state transition, all need to meet each self-corresponding different condition and complete.Simultaneously, note also in the condition identifying on arrow, carry out redirect or reservation respectively to there being the sequence number of (1), (2) or (3) or (4), and according to (1), (2), (3), (4) priority orders from high to low.
For this state of Pinst, correspondence " (1) Irms>=I that has ready conditions
0" and " (2) Irms < I
0" condition, if at condition " (1) Irms>=I
0" under, because current effective value Irms is than current threshold I
0greatly, show that user load end is operated between larger Current Zone, thereby keep Pinst state as trigger pulse source, if at condition " (2) Irms < I
0" under, because current effective value Irms is than current threshold I
0little, show that user load end is operated between little Current Zone, selects Pwr state more accurate as trigger pulse source.
For this state of Pwr, corresponding condition has " (1) Irms>=I
0", condition " (2) r1>=p% " and " (3) r1 < p%, and r2 < p% ".If at condition " (1) Irms>=I
0" under, because current effective value Irms is than current threshold I
0greatly, show that user load end is operated between larger Current Zone, thereby select Pinst state as trigger pulse source; If under condition " (2) r1>=p% ", because r1 is the variation ratio of Pwr with respect to Pnow, be r1=| (Pwr/Pnow)-1|*100%, upgrade with Pwr speed, there is large variation in the power that shows the little current loading of user load end use, so be retained in Pwr state as trigger pulse source; If condition " (3) r1 < p%; and r2 < p% " under, wherein r2 is the variation ratio of Pavg with respect to Pnow, be r2=| (Pavg/Pnow)-1|*100%, speed with Pavg is upgraded, in the time that r1 is in the width of dead band ratio, also must meet r2 also in the width of dead band ratio, the power that shows the little current loading of user load end use changes little, Pavg after average with Pwr measures more steady, so select Pavg state more accurate as trigger pulse source.
For this state of Pavg, " (1) Irms>=I has ready conditions to having respectively
0", condition " (2) r1>=q% ", " (3) r2>=p% " and " (4) r2 < p% ".If at condition " (1) Irms>=I
0" under, because current effective value Irms is than current threshold I
0greatly, show that user load end is operated between larger Current Zone, thereby select Pinst state as trigger pulse source; If under condition " (2) r1>=q% ", because r1 is the variation ratio of Pwr with respect to Pnow, be r1=| (Pwr/Pnow)-1|*100%, upgrade with Pwr speed, having there is large variation in the power that shows the little current loading of user load end use, jumps to Pwr state-driven pulse producer summation pulse; If under condition " (3) r2>=p% ", r2 is the variation ratio of Pavg with respect to Pnow, be r2=| (Pavg/Pnow)-1|*100%, speed with Pavg is upgraded, must there is r2 to exceed dead band proportional width, show that little variation has occurred the little current loading power that user load end uses, and is retained in Pavg state-driven pulse producer summation pulse; If under condition " (4) r2 < p% ", if r2 is in the proportional width of dead band, the power that shows the little current loading of user load end use changes too small, or the curent change being caused by external interference noise completely, selects Pnow state as trigger pulse source.
For this state of Pnow, " (1) Irms>=I has ready conditions to having respectively
0", condition " (2) r1>=q% ", " (3) r2 < p% " and " (4) r2>=p% ".If at condition " (1) Irms>=I
0" under, because current effective value Irms is than current threshold I
0greatly, show that user load end is operated between larger Current Zone, thereby select Pinst state as trigger pulse source; If under condition " (2) r1>=q% ", because r1 is the variation ratio of Pwr with respect to Pnow, be r1=| (Pwr/Pnow)-1|*100%, upgrade with Pwr speed, there is large variation in the power that shows the little current loading of user load end, so select Pwr state as trigger pulse source; If under condition " (3) r2 < p% ", r2 is the variation ratio of Pavg with respect to Pnow, be r2=| (Pavg/Pnow)-1|*100%, speed with Pavg is upgraded, the power that shows the little current loading of user load end use does not change, but the curent change that external interference noise causes is retained in Pnow state as trigger pulse source; If under condition " (4) r2>=p% " after with respect to condition " (2) r1>=q% ", also must there is r2 to exceed dead band proportional width, having there is little variation in the power that shows the little current loading of user load end use, selects Pavg state as trigger pulse source.
For the redirect relation of this one of four states, concrete condition and the following details of redirect state: wherein M=1024, N=16.
I, current be Pinst state-driven pulse producer summation pulse:
(1), as Irms >=5%*Ib, be retained in current Pinst state-driven pulse producer summation pulse;
(2), as Irms < 5%*Ib, jump to Pwr state-driven pulse producer summation pulse.
II, current be Pwr state-driven pulse producer summation pulse:
(1), as Irms >=5%*Ib, jump to Pinst state-driven pulse producer summation pulse;
(2), when r1 >=1%, be retained in current Pwr state-driven pulse producer summation pulse;
(3) as r1 < 1%, and r2 < 1%, jump to Pavg state-driven pulse producer summation pulse.
III, current be Pavg state-driven pulse producer summation pulse:
(1), as Irms >=5%*Ib, jump to Pinst state-driven pulse producer summation pulse;
(2), when r1 >=5%, jump to Pwr state-driven pulse producer summation pulse;
(3), when r2 >=1%, be retained in Pavg state-driven pulse producer summation pulse;
(4), as r2 < 1%, jump to Pnow state-driven pulse producer summation pulse.
IV, current be Pnow state-driven pulse producer summation pulse:
(1), as Irms >=5%*Ib, jump to Pinst state-driven pulse producer summation pulse;
(2), when r1 >=5%, jump to Pwr state-driven pulse producer summation pulse;
(3), as r2 < 1%, be retained in Pnow state-driven pulse producer summation pulse;
(4), when r2 >=1%, jump to Pavg state-driven pulse producer summation pulse.
Embodiment 2:
The present embodiment is from embodiment 1 difference: parameters is chosen different, and other are all the same, wherein M=512, and N=8, specific as follows:
I, current be Pinst state-driven pulse producer summation pulse:
(1), as Irms >=1%*Ib, be retained in current Pinst state-driven pulse producer summation pulse;
(2), as Irms < 1%*Ib, jump to Pwr state-driven pulse producer summation pulse.
II, current be Pwr state-driven pulse producer summation pulse:
(1), as Irms >=1%*Ib, jump to Pinst state-driven pulse producer summation pulse;
(2), when r1 >=0.5%, be retained in current Pwr state-driven pulse producer summation pulse;
(3) as r1 < 0.5%, and r2 < 0.5%, jump to Pavg state-driven pulse producer summation pulse.
III, current be Pavg state-driven pulse producer summation pulse:
(1), as Irms >=1%*Ib, jump to Pinst state-driven pulse producer summation pulse;
(2), when r1 >=3%, jump to Pwr state-driven pulse producer summation pulse;
(3), when r2 >=0.5%, be retained in Pavg state-driven pulse producer summation pulse;
(4), as r2 < 0.5%, jump to Pnow state-driven pulse producer summation pulse.
IV, current be Pnow state-driven pulse producer summation pulse:
(1), as Irms >=1%*Ib, jump to Pinst state-driven pulse producer summation pulse;
(2), when r1 >=3%, jump to Pwr state-driven pulse producer summation pulse;
(3), as r2 < 0.5%, be retained in Pnow state-driven pulse producer summation pulse;
(4), when r2 >=0.5%, jump to Pavg state-driven pulse producer summation pulse.
The present embodiment is with respect to embodiment 1, for the renewal rate lifting between one of four states, the width of dead band ratio and dynamic proportion is relative all to be reduced, for electronic electric energy meter, the frequency of switching between state also just increases a little, and other are the same with the effect of embodiment 1.
Embodiment 3:
The present embodiment and embodiment 1 difference are:
Parameters is chosen difference, and other are all the same, wherein M=2048, and N=32, specific as follows:
I, current be Pinst state-driven pulse producer summation pulse:
(1), as Irms >=10%*Ib, be retained in current Pinst state-driven pulse producer summation pulse;
(2), as Irms < 10%*Ib, jump to Pwr state-driven pulse producer summation pulse.
II, current be Pwr state-driven pulse producer summation pulse:
(1), as Irms >=10%*Ib, jump to Pinst state-driven pulse producer summation pulse;
(2), when r1 >=2%, be retained in current Pwr state-driven pulse producer summation pulse;
(3) as r1 < 2%, and r2 < 2%, jump to Pavg state-driven pulse producer summation pulse.
III, current be Pavg state-driven pulse producer summation pulse:
(1), as Irms >=10%*Ib, jump to Pinst state-driven pulse producer summation pulse;
(2), when r1 >=8%, jump to Pwr state-driven pulse producer summation pulse;
(3), when r2 >=2%, be retained in Pavg state-driven pulse producer summation pulse;
(4), as r2 < 2%, jump to Pnow state-driven pulse producer summation pulse.
IV, current be Pnow state-driven pulse producer summation pulse:
(1), as Irms >=10%*Ib, jump to Pinst state-driven pulse producer summation pulse;
(2), when r1 >=8%, jump to Pwr state-driven pulse producer summation pulse;
(3), as r2 < 2%, be retained in Pnow state-driven pulse producer summation pulse;
(4), when r2 >=2%, jump to Pavg state-driven pulse producer summation pulse.
The present embodiment is compared with embodiment 1, decline for the renewal rate between one of four states, the width of dead band ratio and dynamic proportion is relative increase all, for electronic electric energy meter, also reducing a little just of the frequency of switching between state, other are the same with the effect of embodiment 1.
Finally, for the parameter I of mentioning in the present invention
0, r1, r2, M, N, p% and q% reasonable value, can adjust according to practical application.
Of the present inventionly reduce the method that electrical energy pulse is beated, be not limited only to use the chip in electric energy meter, also the thought of this kind of method can be applied in single-chip microcomputer, embedded development, still, belong to equally the scope of protection of the invention.
The technical scheme above embodiment of the present invention being provided is described in detail, applied principle and the embodiment of specific case to the embodiment of the present invention herein and set forth, the explanation of above embodiment is only applicable to help to understand the principle of the embodiment of the present invention; , for one of ordinary skill in the art, according to the embodiment of the present invention, in embodiment and range of application, all will change, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (2)
1. reduce the method that electrical energy pulse is beated, it is characterized in that, comprise the steps:
Set one of four states according to the power source of driving pulse: Pinst state, Pwr state, Pavg state and Pnow state,
, or be retained under current state from a certain state transition to another state according to different conditions, the power source corresponding with state removes drive-pulse generator, cumulative electric energy metrical pulse value;
Described Pinst represents instantaneous power, and it is average that the M that described Pwr is described Pinst is ordered, and on average, described Pnow is the power source of trigger pulse instantly to the N point that described Pavg is Pwr;
According to different conditions from a certain state transition to or to be retained in corresponding state concrete condition as follows:
Wherein r1: for Pwr is with respect to the variation ratio of Pnow, i.e. r1=
|(Pwr/Pnow)-1
|* 100%;
R2: for Pavg is with respect to the variation ratio of Pnow, i.e. r2=
|(Pavg/Pnow)-1
|* 100%;
I, current be Pinst state-driven pulse producer summation pulse:
(1) as current effective value Irms>=current threshold I
0, be retained in current Pinst state-driven pulse producer summation pulse;
(2) as current effective value Irms< current threshold I
0, jump to Pwr state-driven pulse producer summation pulse;
II, current be Pwr state-driven pulse producer summation pulse:
(1) as current effective value Irms>=current threshold I
0, jump to Pinst state-driven pulse producer summation pulse;
(2), as r1 >=dead band ratio p%, be retained in current Pwr state-driven pulse producer summation pulse;
(3) as r1< dead band ratio p%, and r2< dead band ratio p%, jump to Pavg state-driven pulse producer summation pulse;
III, current be Pavg state-driven pulse producer summation pulse:
(1) as current effective value Irms>=I
0, jump to Pinst state-driven pulse producer summation pulse;
(2), as r1 >=dynamic proportion q%, jump to Pwr state-driven pulse producer summation pulse;
(3), as r2 >=dead band ratio p%, be retained in Pavg state-driven pulse producer summation pulse;
(4), as r2< dead band ratio p%, jump to Pnow state-driven pulse producer summation pulse;
IV, current be Pnow state-driven pulse producer summation pulse:
(1) as current effective value Irms>=current threshold I
0, jump to Pinst state-driven pulse producer summation pulse;
(2), as r1 >=dynamic proportion q%, jump to Pwr state-driven pulse producer summation pulse;
(3), as r2< dead band ratio p%, be retained in Pnow state-driven pulse producer summation pulse;
(4), as r2 >=dead band ratio p%, jump to Pavg state-driven pulse producer summation pulse.
2. a kind of method that electrical energy pulse is beated that reduces according to claim 1, is characterized in that:
Described current threshold I
0be used for doing the fixing little electric current of staging treating, wherein said current threshold I
0for n% times of fundamental current Ib, and 1%≤n%≤10%, i.e. I
0=n%*Ib.
3. a kind of method that electrical energy pulse is beated that reduces according to claim 2, is characterized in that:
Described multiple n% is 1%.
4. a kind of method that electrical energy pulse is beated that reduces according to claim 1, is characterized in that:
The scope of described dead band ratio p% and described dead band ratio q% is:
0.5%≤p%≤2%，3%≤q%≤8%。
5. a kind of method that electrical energy pulse is beated that reduces according to claim 4, is characterized in that:
Described dead band ratio p% is 1%, and described dynamic proportion q% is 5%.
6. a kind of method that electrical energy pulse is beated that reduces according to claim 1, is characterized in that:
Described M, N are 2 exponential.
7. a kind of method that electrical energy pulse is beated that reduces according to claim 6, is characterized in that:
Described M is 1024, and described N is 16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN112444671A (en) * | 2020-10-27 | 2021-03-05 | 深圳市科陆精密仪器有限公司 | Electric energy metering method and device of electric energy meter based on instantaneous power and storage medium |
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