CN204214948U - A kind of electric energy metrical structure - Google Patents
A kind of electric energy metrical structure Download PDFInfo
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- CN204214948U CN204214948U CN201420736057.3U CN201420736057U CN204214948U CN 204214948 U CN204214948 U CN 204214948U CN 201420736057 U CN201420736057 U CN 201420736057U CN 204214948 U CN204214948 U CN 204214948U
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Abstract
The utility model relates to a kind of electric energy metrical structure, comprising: judge module, for receiving real-time power, and judges the positive and negative of inputted real-time power, exports reverse signal; Accumulation module, accumulation module is connected with judge module with real-time power input end respectively, carries out cumulative measurement according to reverse signal to received real-time power according to its positive negative direction, and cumulative measurement value is exported as electric energy metrical value; Fast-pulse generation module, for receiving reverse signal and electric energy metrical value, and exports fast-pulse and negative work instruction according to reverse signal and electric energy metrical value; Slow pulsation generation module, receives fast-pulse and negative work instruction, and according to the slow pulsation that fast-pulse and negative work indicate generation two proportional.The accurate measurement of positive and negative electric energy can be realized in electric energy computation chip, have both anti-electricity-theft function simultaneously, to realize the demand of intelligent grid.
Description
Technical field
The utility model relates to a kind of electric energy metrical structure.
Background technology
Current, intelligent grid construction has become the basic development strategy of country, and intelligent grid has informationization, digitizing, robotization, interactive feature " unified strong intelligent grid ".Intelligent grid is compared with traditional electrical network, has much different feature and advantage, encourages power consumer participate in electrical production and carry out optional consumption, compatible all kinds of distributed power generation and energy storage etc. to greatest extent.Such as, in solar grid-connected electricity generation system, by sun power is converted into electric energy, without batteries to store energy, directly by combining inverter, electric energy is served electrical network.When there being sunshine, sun power transform electric energy through combining inverter, electric energy is delivered directly in AC network, or the electric energy converted solar energy into through combining inverter directly for AC load is powered.
But electric energy meter of the prior art can only calculate the electric energy of the real consumption of user, universal along with intelligent grid, requiring that electric energy meter must be accomplished can the real consumption electric energy of accurate measurement electricity consumer, and if there is reverse electricity consumption, not only to provide negative work instruction, also will measure.
Be connected to electric energy meter between the load of electrical network access electricity consumer, realize the metering to electricity consumer consumption electric energy.Electric energy computation chip as energy calculate mechanism is the core of electric energy meter, the sample rate current of access electric energy meter and sampled voltage are carried out analog to digital conversion, output can represent the fast-pulse of real consumption electric energy, and the micro-control unit (MCU) etc. for the School Affairs supply of electrical energy table to electric energy meter measures the real consumption electric energy of electricity consumer.As Fig. 1 electric energy metrical value with export fast-pulse graph of a relation shown in.Meanwhile, electric energy computation chip exports the slow pulsation proportional with fast-pulse, for the stepper motor of Direct driver electric energy meter, measures to promote the real consumption electric energy of register to electricity consumer.As shown in the proportionate relationship figure of Fig. 2 fast-pulse and slow pulsation, in this figure, the ratio of fast-pulse and slow pulsation is 2N, N=4.Because step motor needs two pulses to complete once promote register, so slow pulsation needs to provide slow pulsation 1 and slow pulsation 2.It should be noted that if only go out to have slow pulsation 1 not go out slow pulsation 2 and do not complete and once promote register, namely electric energy measures, and namely produces electricity filching behavior.
The status of anti-theft electricity technology in electric energy meter industry of electric energy meter is more and more important, so in electric energy computation chip field, correspondingly require that chip has anti-electricity-theft Detection and measure function, the electric energy metrical of positive and negative both direction is carried out to real-time power and real-time power reverse signal can be provided, prevent the part reversal connection accessing electric energy meter from causing the mistake of electric energy metrical, i.e. electricity filching behavior.So have the basic function that anti-electricity-theft Detection and measure function becomes the electric energy computation chip meeting intelligent grid requirement.
Utility model content
The utility model is intended to solve the problems of the technologies described above, and provides the structure of positive and negative electric energy metrical in a kind of electric energy metrical, can realize the accurate measurement of positive and negative electric energy, have both anti-electricity-theft function simultaneously in electric energy computation chip, to realize the demand of intelligent grid.
The utility model provides a kind of electric energy metrical structure, comprising: real-time power input end, for inputting real-time power;
Judge module, described judge module is connected with described real-time power input end, for receiving described real-time power, and judges the positive and negative of inputted real-time power, when the real-time power inputted is negative work, exports reverse signal if judge;
Accumulation module, described accumulation module is connected with described judge module with described real-time power input end respectively, for receiving described real-time power and described reverse signal, and according to described reverse signal, according to its positive negative direction, cumulative measurement is carried out to received real-time power, and cumulative measurement value is exported as electric energy metrical value;
Fast-pulse generation module, described fast-pulse generation module is connected with described judge module and described accumulation module respectively, for receiving described reverse signal and described electric energy metrical value, and export fast-pulse and negative work instruction according to described reverse signal and electric energy metrical value;
Slow pulsation generation module, slow pulsation generation module is connected with described fast-pulse generation module, for receiving described fast-pulse and the instruction of described negative work, and according to the slow pulsation that described fast-pulse and described negative work indicate generation two proportional.
Wherein, there is reverse electricity consumption for reminding in described negative work instruction.
Described fast-pulse is used for measuring the real consumption electric energy of electricity consumer the micro-control unit (MCU) etc. of the School Affairs supply of electrical energy table of electric energy meter.
Described slow pulsation is used for the stepper motor of Direct driver electric energy meter, measures to promote the real consumption electric energy of register to electricity consumer.Because step motor needs two pulses to complete once promote register, so need two slow pulsation.
According to electric energy metrical structure provided by the utility model, achieve in electric energy metrical the accurate measurement aligning negative electricity energy, to meet the demand of intelligent grid, have both anti-electricity-theft function simultaneously, greatly reduce the manufacturing cost of simple electric energy meter in intelligent grid, algorithm is simple, is easy to realize.
Accompanying drawing explanation
Fig. 1 is electric energy metrical value and the graph of a relation exporting fast-pulse;
Fig. 2 is the proportionate relationship figure of fast-pulse and slow pulsation;
Fig. 3 is the graph of a relation of electric energy metrical value, fast-pulse, reverse signal and negative work instruction;
Fig. 4 is the schematic diagram of electric energy metrical structure involved in embodiment;
Fig. 5 is one of graph of a relation of fast-pulse and slow pulsation;
Fig. 6 is one of graph of a relation of fast-pulse and slow pulsation;
Fig. 7 is one of graph of a relation of fast-pulse and slow pulsation;
Fig. 8 is one of graph of a relation of fast-pulse and slow pulsation;
Fig. 9 is one of graph of a relation of fast-pulse and slow pulsation;
Figure 10 is one of graph of a relation of fast-pulse and slow pulsation;
Figure 11 is one of graph of a relation of fast-pulse and slow pulsation;
Figure 12 is one of graph of a relation of fast-pulse and slow pulsation;
Figure 13 is one of graph of a relation of fast-pulse and slow pulsation;
Figure 14 is one of graph of a relation of fast-pulse and slow pulsation;
Figure 15 is the flow chart of steps producing slow pulsation according to fast-pulse.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described.
Fig. 3 is the graph of a relation of electric energy metrical value, fast-pulse, reverse signal and negative work instruction, when the electricity consumption of user's forward, i.e. electric energy matter rollforward, when reaching a certain particular value T1, fast-pulse module exports fast-pulse, and namely this fast-pulse represents the metering of forward electric energy.
But, if when there is reverse electricity consumption, electric energy matter is carried out negative sense and is added up, after residual forward electric energy matter being reset, negative sense adds up, reverse signal is exported when clearing, but only when electric energy matter negative sense is accumulated to a certain particular value T2, fast-pulse module exports fast-pulse, export negative work instruction simultaneously.That is, represent to be now positive work time negative work is designated as 0, time negative work is designated as 1, represent to be now negative work.When negative work is designated as 1, the MCU of ammeter informs to there is reverse electricity consumption.Fig. 4 is the schematic diagram of electric energy metrical structure involved in embodiment,
Judge module 1 is connected with real-time power input end (not shown), for receiving real-time power and judging the positive and negative of real-time power, if export reverse signal when real-time power is negative to the accumulation module 2 be connected.
Accumulation module 2 is connected with real-time power input end with judge module 1 respectively, accumulation module 2 is for carrying out cumulative measurement to inputted real-time power, and cumulative measurement value is exported as electric energy metrical value, wherein, to the cumulative measurement of real-time power, there is direction, concrete, the cumulative measurement of composition graphs 3 pairs of accumulation module 2 elaborates, when accumulation module 2 does not receive the reverse signal of judge module 1 output, cumulative measurement in accumulation module 2 is the cumulative measurement of forward, when accumulation module 2 receives reverse signal, cumulative measurement in accumulation module 2 is the cumulative measurement of negative sense.
Fast-pulse generation module 3 is connected with accumulation module 2 with judge module 1, for receiving reverse signal that judge module 1 exports and the electric energy metrical value that accumulation module 2 exports, and produce and export fast-pulse and negative work instruction, concrete composition graphs 3 is described this process, when fast-pulse generation module 3 does not receive reverse signal and electric energy metrical value reaches a particular value time, produce and export fast-pulse, when fast-pulse generation module 3 receives reverse signal and electric energy metrical value reaches a particular value time, to produce and while exporting fast-pulse, produce and export reverse signal.
Slow pulsation generation module 4 is connected with fast-pulse generation module 3, for the slow pulsation indicating output two proportional according to fast-pulse and negative work.
Wherein, there is reverse electricity consumption for reminding in described negative work instruction.
Described fast-pulse is used for measuring the real consumption electric energy of electricity consumer the micro-control unit (MCU) etc. of the School Affairs supply of electrical energy table of electric energy meter.
Described slow pulsation is used for the stepper motor of Direct driver electric energy meter, measures to promote the real consumption electric energy of register to electricity consumer.Because step motor needs two pulses to complete once promote register, so need two slow pulsation.
Below for the principle of work of electric energy metrical of the present utility model, composition graphs 3, Fig. 5 ~ Figure 15 is described.
Step 1, judge module 1 is to received real-time power and judge the positive and negative of real-time power, if export reverse signal when real-time power is negative to the accumulation module 2 be connected.
Step 2, accumulation module 2 carries out cumulative measurement to inputted real-time power, and cumulative measurement value is exported as electric energy metrical value, wherein, to the cumulative measurement of real-time power, there is direction, concrete, the cumulative measurement process continuing composition graphs 3 pairs of accumulation module 2 elaborates, when accumulation module 2 does not receive the reverse signal of judge module 1 output, cumulative measurement in accumulation module 2 is the cumulative measurement of forward, when accumulation module 2 receives reverse signal, the cumulative measurement in accumulation module 2 is the cumulative measurement of negative sense.
Step 3, fast-pulse generation module 3 receives reverse signal that judge module 1 exports and the electric energy metrical value that accumulation module 2 exports, and produce and export fast-pulse and negative work instruction, concrete, continue composition graphs 3 to be described this process, when fast-pulse generation module 3 does not receive reverse signal and electric energy metrical value reaches a particular value time, produce and export fast-pulse and negative work instruction " 0 ", when fast-pulse generation module 3 receives reverse signal and electric energy metrical value reaches a particular value time, to produce and while exporting fast-pulse, produce and export negative work instruction " 1 ".
Step 4, slow pulsation generation module 4 receives fast-pulse that fast-pulse generation module 3 exports and the proportional slow pulsation of negative work instruction output two.
Concrete, the generation step of slow pulsation in composition graphs 5 ~ Figure 15 description of step 4.
In the utility model, slow pulsation module 4 produces the method for slow pulsation according to fast-pulse and negative work instruction, is realized, that is: by state in 8
State 0: real-time power is forward, does not go out F1, does not go out F2;
State 1: real-time power is forward, goes out F1;
State 2: real-time power is forward, goes out F2;
State 3: real-time power is forward, appears F1, does not go out F2;
State 4: real-time power is oppositely, does not go out F1, does not go out F2;
State 5: real-time power is oppositely, goes out F1;
State 6: real-time power is oppositely, goes out F2;
State 7: real-time power is oppositely, appears F1, does not go out F2;
Wherein F1 is slow pulsation 1, F2 is slow pulsation 2.
Below by way of Fig. 5 ~ Figure 15, above state is described in detail, the fast-pulse that slow pulsation generation module 4 exports according to fast-pulse generation module 3 and negative work instruction generate the method for slow pulsation, can be realized by the process flow diagram shown in Figure 15, Figure 15 is the flow chart of steps producing slow pulsation according to fast-pulse, and Fig. 5 ~ Figure 14 is the graph of a relation of fast-pulse and slow pulsation.Wherein, under all states, the frequency proportions of fast-pulse and slow pulsation is closed is 2N, N=4.
If real-time power is forward when first powering on, is now state 0, does not go out F1, do not go out F2; When fast-pulse number is N, become state 1, go out slow pulsation 1; Then when fast-pulse number is N, become state 2, namely go out slow pulsation 2; Circulation like this, exports slow pulsation 1 and slow pulsation 2 successively.Now the relation of fast-pulse and slow pulsation as shown in Figure 5.
If real-time power is reverse when powering on, because negative work instruction just provides, so be state 0 at the beginning when exporting fast-pulse.After first fast-pulse occurs, change state 4 into, when fast-pulse is N, become state 5, now occur slow pulsation 1; Subsequently as meter fast-pulse number N, now become state 6, go out slow pulsation 2; Recurrent state 5 like this and state 6, export slow pulsation 1 and slow pulsation 2 successively.Fast-pulse now and the relation of slow pulsation are as shown in Figure 6.
If real-time power is forward when powering on, it is now state 0; During meter fast-pulse number M (M<N), real-time power transfers to oppositely, provides negative work instruction, then meter subtracts M fast-pulse, equal 0 to counting, transfer state 4 to, meter fast-pulse number N, become state 5, go out slow pulsation 1, count fast-pulse number N subsequently and become state 6, go out slow pulsation 2, recurrent state 5, state 6 successively again, exports slow pulsation 1 and slow pulsation 2 successively.Now the relation of fast-pulse and slow pulsation as shown in Figure 7.
If real-time power is reverse when powering on, because negative work instruction just provides when exporting fast-pulse, so be state 0 at the beginning, Deng transferring state 4 after first fast-pulse to, during meter fast-pulse number M (M<N), real-time power transfers forward to, cancel negative work instruction, then meter subtracts M fast-pulse, 0 is equaled to counting, transfer state 0 to, meter fast-pulse number N, for state 1, go out slow pulsation 1, meter fast-pulse number N becomes state 2, go out slow pulsation 2, recurrent state 1 successively again, state 2, export slow pulsation 1 and slow pulsation 2 successively.Now the relation of fast-pulse and slow pulsation as shown in Figure 8.
If real-time power is forward and appears slow pulsation 1 (being now state 1) when powering on, during meter fast-pulse number M (M<N), real-time power transfers to oppositely, provide negative work instruction, then meter subtracts M fast-pulse, equals 0, transfer state 7 to counting, meter fast-pulse number 2N, transfer state 5 to, meter fast-pulse number N, becomes state 6 and goes out slow pulsation 2, recurrent state 5, state 6 successively again, exports slow pulsation 1 and slow pulsation 2 successively.Now the relation of fast-pulse and slow pulsation as shown in Figure 9.
If real-time power is oppositely and appears slow pulsation 1 (being now state 5) when powering on, during meter fast-pulse number M (M<N), real-time power transfers forward to, cancel negative work instruction, meter subtracts M fast-pulse then, equals 0 to counting, transfer state 3 to, meter fast-pulse number 2N, transfers state 1 to, meter fast-pulse number N, become state 2, go out slow pulsation 2, then recurrent state 1, state 2 successively, export slow pulsation 1 and slow pulsation 2 successively.Now the relation of fast-pulse and slow pulsation as shown in Figure 10.
If real-time power is forward and appear slow pulsation 2 (being now state 2), during meter fast-pulse number M (M<N), real-time power transfers to oppositely, provides negative work instruction, then meter subtracts M fast-pulse, equal 0 to counting, transfer state 4 to, meter fast-pulse number N, transfer state 5 to, go out slow pulsation 1, then recurrent state 6, state 5 successively, export slow pulsation 2 and slow pulsation 1 successively.Now the relation of fast-pulse and slow pulsation as shown in figure 11.
If real-time power is oppositely and appears slow pulsation 2 (being now state 6), during meter fast-pulse number M (M<N), real-time power transfers forward to, cancels negative work instruction, then meter subtracts M fast-pulse, equal 0 to counting, transfer state 0 to, meter fast-pulse number N, become state 1, go out slow pulsation 1, then recurrent state 2, state 1 successively, export slow pulsation 2 and slow pulsation 1 successively.Now the relation of fast-pulse and slow pulsation as shown in figure 12.
If real-time power is forward and appear slow pulsation 1 (now state 1), during meter fast-pulse number M (M<N), real-time power transfers to oppositely, provide negative work instruction, then meter subtracts M fast-pulse, 0 is equaled to counting, transfer state 7 to, during meter fast-pulse number L (L<2N), real-time power transfers forward to again, cancel negative work instruction, then meter subtracts L fast-pulse, 0 is equaled to counting, transfer state 1 to, meter fast-pulse number N, transfer state 2 to, go out slow pulsation 2, recurrent state 1 successively again, state 2, export slow pulsation 1 and slow pulsation 2 successively.Now the relation of fast-pulse and slow pulsation as shown in figure 13.
If real-time power is oppositely and appears slow pulsation 1 (being now state 5), during meter fast-pulse number M (M<N), real-time power transfers forward to, cancel negative work instruction, then meter subtracts M fast-pulse, 0 is equaled to counting, transfer state 3 to, during meter fast-pulse number L (L<2N), real-time power transfers to again oppositely, provide negative work instruction, then meter subtracts L fast-pulse, 0 is equaled to counting, transfer state 5 to, meter fast-pulse number N, transfer state 6 to and go out slow pulsation 2, recurrent state 5 successively again, state 6, export slow pulsation 1 and slow pulsation 2 successively.Now the relation of fast-pulse and slow pulsation as shown in figure 14.
According to electric energy metrical structure of the present utility model, the accurate measurement aligning negative electricity energy in electric energy metrical can be realized, to meet the demand of intelligent grid, can provide negative work instruction and accurate Calculation electric energy has both anti-electricity-theft function simultaneously, greatly reduce the manufacturing cost of simple electric energy meter in intelligent grid, provide more convenient and economical to user simultaneously.And positive and negative electric energy metrical structure is simple in a kind of electric energy metrical of the present utility model, be easy to realize.
Claims (1)
1. an electric energy metrical structure, comprises real-time power input end, for inputting real-time power, it is characterized in that, comprising:
Judge module, described judge module is connected with described real-time power input end, for receiving described real-time power, and judges the positive and negative of inputted real-time power, when the real-time power inputted is negative work, exports reverse signal if judge;
Accumulation module, described accumulation module is connected with described judge module with described real-time power input end respectively, for receiving described real-time power and described reverse signal, and according to described reverse signal, according to its positive negative direction, cumulative measurement is carried out to received real-time power, and cumulative measurement value is exported as electric energy metrical value;
Fast-pulse generation module, described fast-pulse generation module is connected with described judge module and described accumulation module respectively, for receiving described reverse signal and described electric energy metrical value, and export fast-pulse and negative work instruction according to described reverse signal and electric energy metrical value;
Slow pulsation generation module, slow pulsation generation module is connected with described fast-pulse generation module, for receiving described fast-pulse and the instruction of described negative work, and according to the slow pulsation that described fast-pulse and described negative work indicate generation two proportional.
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| CN104502697A (en) * | 2014-11-28 | 2015-04-08 | 上海贝岭股份有限公司 | Structure and method for electric energy metering |
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| CN104502697A (en) * | 2014-11-28 | 2015-04-08 | 上海贝岭股份有限公司 | Structure and method for electric energy metering |
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