CN108896805A - Chopping signal calibration method, system and electric energy detection device - Google Patents
Chopping signal calibration method, system and electric energy detection device Download PDFInfo
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- CN108896805A CN108896805A CN201810555796.5A CN201810555796A CN108896805A CN 108896805 A CN108896805 A CN 108896805A CN 201810555796 A CN201810555796 A CN 201810555796A CN 108896805 A CN108896805 A CN 108896805A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
- G01R11/24—Arrangements for avoiding or indicating fraudulent use
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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Abstract
The invention discloses a kind of chopping signal calibration method, system and electric energy detection devices, and described method includes following steps：Real-time sampling is carried out to electric power signal, and waveform recovery is carried out to sampled signal；Integrity analysis is carried out to the sampled signal of recovery, judges whether sampled signal is in copped wave state；Copped wave type is judged according to the copped wave state of sampled signal；According to copped wave type, information parsing is carried out to sampled signal or validity is handled.The present invention carries out parsing or validity processing by real-time monitoring chopping signal, and to chopping signal, can not only obtain the information of chopper communication carrying in time, it is also ensured that the measurement accuracy of electrical energy devices, while also can guarantee the basic interests of power office.
Description
Technical field
The present invention relates to copped wave processing techniques, in particular to a kind of chopping signal calibration method, system and electric energy
Detection device.
Background technique
Power line chopping signal is divided into DC chopped-wave and AC chopping, is a kind of electric by means of thyristor and auxiliary control
Road carries out part signal to power line signal and cuts signal processing side except (or just, the irregular angle of cosine signal cut and remove)
Formula.
Power line chopping signal is applied in electric energy meter field is divided into two kinds：
1) application that the communication of certain distinctive signal of power line is carried out by the chopping signal of low-angle, due to copped wave angle compared with
The power network signal of small and power line itself characteristics, the power line chopper communication signal such as be easy to be interfered is difficult to be detected, thus
It is difficult the monomer information for identifying that chopping signal is transmitted；In this case, existing electric energy meter can not effectively detect power line
The generation of copped wave can not more identify monomer information entrained by (parsing) chopping signal；
2) it is applied to influence the power line copped wave stealing of electric energy meter metering system, the metering of electric energy meter is mainly by metering units
Voltage AD sampling and electric current AD sampling carry out power calculation, to calculate the electricity consumption situation of user, but have illegal point of part
Son carries out copped wave from input terminal to the voltage sample part signal of ammeter in the way of special stealing, destroys the complete of signal
Property, the voltage effective value for causing ammeter actual samples to arrive is less than the voltage effective value of user's practical application, to reach stealing
Purpose, this kind of stealing mode are known as power line copped wave stealing；
In addition, electric energy meter sampling can not obtain the voltage vector virtual value of actual user in the application, in the electric energy of calculating
During by serious influence, chopper is accessed into electric energy meter calibration equipment, electric energy meter carries out essence in precision verification equipment
When degree calibrating, the real-time accuracy error (between standard test equipment) of electric energy meter can be as chopper be to electric energy meter voltage sample
Signal is cut the variation except angle and is changed, and causes electric energy meter relative to the error of standard test equipment more than electric energy meter measuring accuracy
It is required that range.
In view of this, it is necessary to provide a kind of chopping signal calibration methods, device, to solve above-mentioned technical problem.
Summary of the invention
In order to solve the above-mentioned technical problems, the present invention provides a kind of chopping signal calibration method, system and electric energy detections
Device, the present invention carry out parsing or validity processing by real-time monitoring chopping signal, and to chopping signal, can not only obtain in time
The information for taking chopper communication to carry, it is also ensured that the measurement accuracy of electrical energy devices, while also can guarantee the basic interests of power office.
To achieve the goals above, one aspect of the present invention provides a kind of chopping signal calibration method, this method packet
Include following steps：
Real-time sampling is carried out to electric power signal, and waveform restoration disposal is carried out to sampled signal and obtains restoring sampled signal；
Integrity analysis is carried out to the recovery sampled signal, judges whether it is in copped wave state；
If being in copped wave state, copped wave type is judged according to the wave character for restoring sampled signal.
As a kind of perferred technical scheme, described to be specially to sampled signal progress waveform restoration disposal：It is adopted each
The voltage of sampling point arranges according to time sequencing and carries out process of fitting treatment, obtains restoring sampled signal.
As a kind of perferred technical scheme, described pair of recovery sampled signal carries out integrity analysis, judges to restore sampling
Whether signal is in copped wave state：Judge restore whether sampled signal is complete, whether has waveform mutation, according to recovery
The imperfection or waveform catastrophe of sampled signal judge that sample waveform is in copped wave state.
As a kind of perferred technical scheme, described to judge that copped wave type is specially according to wave character：Believed according to copped wave
Number mutation form whether influence measuring equipment actual metered result to judge that copped wave will cut for chopper communication or copped wave stealing
Wave type is divided into chopper communication or copped wave stealing, mainly divides into：Stealing copped wave, which only passes through the mode of connection and stealing equipment, to be influenced
The integrality of the voltage sampling signal of measuring equipment, stealing end can be completely achieved by proximally forming new electrical equipment work
Circuit, actual metered equipment then count electric energy less；Chopper communication is then two kinds of situations, and situation 1 is measuring equipment in data processing
Impacted and sample waveform imperfection is presented as the identical mutation pattern with frequency with phase formula, such copped wave to voltage and current simultaneously
Signal does not influence the normal metering that metering is set, and is also unable to reach stealing, but progress can be more negotiated an agreement after copped wave detection
Signal carries information parsing, and situation 2 is the chopping signal of regulation minute angle, this minute angle do not change or variation not
The normal metering of measuring equipment is impacted, then is determined as chopper communication according to testing result.
As a kind of perferred technical scheme, the abnormal sudden change details includes power line DC pulse formula copped wave and exchange
Regular or irregular angle exception copped wave；If abnormal sudden change details is the formula copped wave of power line DC pulse, copped wave type is to cut
Wave stealing；If the abnormal sudden change details is exchange rule or irregular angle copped wave, copped wave type is chopper communication.
As a kind of perferred technical scheme, the chopping signal calibration method further includes：Sentence to copped wave type
It has no progeny, according to copped wave type, to restoring, sampled signal carries out information parsing or validity is handled.
As a kind of perferred technical scheme, described according to copped wave type, to restore sampled signal carry out information parsing or
Efficiency analysis is specially：If copped wave state is chopper communication, the communication information carried by communication protocol to chopped waveform
It is parsed；
If copped wave state is judged as copped wave stealing, same phase is carried out with actual current using voltage rating replacement chopping voltage
Vector calculus obtains the actual power consumption amount of sampled signal.
Another aspect of the present invention, provides a kind of chopping signal calibrating installation, which includes that sampling and waveform restore
Unit, waveform analysis unit, copped wave type decision unit and copped wave processing unit；The sampling and waveform restoration unit, described
Waveform analysis unit, the copped wave type decision unit and the copped wave processing unit are sequentially connected with；Wherein,
The sampling and waveform restoration unit carry out real-time sampling to electric power signal, and it is multiple to carry out waveform to sampled signal
Original place, which manages to obtain, restores sampled signal；
The waveform analysis unit carries out integrity analysis to sampled signal is restored, judges that the recovery sampled signal is
It is no to be in copped wave state；
The copped wave type judging unit judges copped wave type according to the wave character for restoring sampled signal；
The copped wave processing unit, according to copped wave type, to restoring, sampled signal carries out information parsing or validity is handled.
As a kind of perferred technical scheme, the sampling and waveform restoration unit include sample circuit and micro-control molding
Block, the sample circuit are connect with the micro-control module, and the sample circuit connection is acquired adopted in real time by sampling circuit
Sampled signal real-time transmission to micro-control module is carried out waveform recovery by the electric power signal of line-transect road；The micro-control module
It is connect with the waveform analysis unit, the sample waveform of recovery is transmitted to the waveform analysis unit and carries out sentencing for copped wave state
It is disconnected.
As a kind of perferred technical scheme, the sample circuit includes at least two sampling resistors being serially connected, institute
It is in parallel with the latter sampling resistor to state micro-control module.
As another technical solution of the invention, a kind of electric energy detection device, packet in the electric energy detection device are provided
Containing chopping signal verification system as described above.
Compared with prior art, beneficial effects of the present invention are：
The present invention carries out parsing to chopping signal or validity is handled by real-time monitoring chopping signal, not only can and
When obtain chopper communication carry information, it is also ensured that the measurement accuracy of electrical energy devices, at the same also can guarantee power office it is basic
Interests.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation do not constitute the restriction to the application for explaining the application.
Fig. 1 is the schematic diagram of chopping signal calibration method described in embodiment one；
Fig. 2 is the schematic diagram of the undisturbed information of standard described in embodiment one；
Fig. 3 is the information schematic diagram interfered described in embodiment one by chopping signal.
Specific embodiment
The invention will be further described with embodiment with reference to the accompanying drawing.
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Embodiment one
As shown in Figure 1, a kind of chopping signal calibration method, this method comprises the following steps：
S01：Real-time sampling is carried out to electric power signal, and waveform restoration disposal is carried out to sampled signal and obtains restoring sampling letter
Number；
The voltage of each sampled point is arranged to according to time sequencing and carried out process of fitting treatment, obtains restoring sampled signal.
S02：Integrity analysis is carried out to sampled signal is restored, judges to restore whether sampled signal is in copped wave state；
Judge restore whether sampled signal is complete, whether has waveform mutation, according to the deletion condition for restoring sampled signal
Or waveform catastrophe judges that sample waveform is in copped wave state.Specifically：The each sampling restored in sampled signal is clicked through
Row, which is differentiated, calculates difference between two neighboring sampled point using second-order algorithm, new data Xn is obtained, then by Xn
It is compared with preset threshold value G, while according to the data C of comparison result refresh counter, after data compare, finally
The Counter Value D of data C and systemic presupposition is compared, obtains judgment basis value E, copped wave is judged whether there is according to the value of E
Occur (such as：If C is equal with D, E 1, being judged as has copped wave, if C and D are differed, E 0 is judged as no copped wave
Occur), if there is copped wave, determine that restoring sampled signal is in copped wave state.
Description below is made to door restrict G and counter D：Threshold value G：It is set as 200.The calculation formula of threshold value G is：
G=sampled peak × max (V(sin (sampling number in the 2*pai/ monocycle))
Wherein, V(sin (sampling number in the 2*pai/ monocycle)Indicate the change rate of sin (sampling number in the 2*pai/ monocycle), if
Sampled point in monocycle takes 64, and the peak value detected is 800, and the numerical value that G is as a result calculated is 200 (if in the monocycle
Hits is 128, then the value that G is calculated is that sin (2*pai/64) change rate maximum value takes 0.25 under 100,64 sampled points；
The change rate maximum value of sin (x) is influenced by sample rate)；The Counter Value D of systemic presupposition：It is set as 2.It needs exist for illustrating
, in the present embodiment, the ideal value that counter is arranged is 0, and offset 1, then threshold value is 2.Ideal value is as believed in sampling
The value of counter when number complete state no interference signal；Offset is to have interference signal in sampled signal, but believe according to the interference
Counter Value when number not can determine that in sampled signal with the presence or absence of chopping signal, correspondingly, threshold value is that sampled signal is in and cuts
When wavy state, the value of counter；The data C according to comparison result refresh counter among the above, as：According to sampled signal
The judging result for being disturbed situation and making.
S03：If the recovery sampled signal is in copped wave state, copped wave class is judged according to the wave character for restoring sampled signal
Type；
Copped wave type is divided into chopper communication or copped wave stealing according to the abnormal sudden change details of copped wave.Specifically：It is abnormal prominent
The section that attenuates generally comprises power line DC pulse formula copped wave and exchange rule or irregular angle exception copped wave；If abnormal sudden change is thin
Section is the formula copped wave of power line DC pulse, then copped wave type is copped wave stealing；If abnormal sudden change details is exchange rule or does not advise
Then angle copped wave, then copped wave type is chopper communication.What needs to be explained here is that chopper communication is generally low-angle copped wave letter
Number, since low-angle chopping signal Characteristics of Mutation is small, it is difficult to differentiate between under power line different loads Pattern perturbation mode, therefore this
Embodiment is double sampled using sigma-delta ADC and common the ADC progress of integrating metrology chip, utilizes the standard two of neighbouring sample signal
Order difference algorithm, peak value method of comparison judge low-angle exception chopping signal, and set continuous abnormal signal frequency
As one of decision threshold, it is determined as low-angle chopping signal, i.e. chopper communication to occurring mutation periodic signal in continuous cycles
Signal；In addition, common ADC sampling number is 256 points because integrating metrology chip ADC sampling number is 64 points of per signal periods
The judging result of per signal period, the present embodiment can effectively exclusion criteria harmonic wave interference bring abnormal signal influence.
S04：According to copped wave type, to restoring, sampled signal carries out information parsing or validity is handled.
If it is determined that being chopper communication, then to sampled signal progress information parsing is restored, specially：According to user client communication
Specification, it is assumed that determine that signal copped wave occurs as carrying information monomer ' 1 ' in signal period, non-copped wave monocycle signal is determined as letter
Interest statement body ' 0 ', while judgement state is drafted as fixed value, being drafted here as ' 1111 ' information is acts of determination decree, such as Fig. 2 institute
Show, for actual signal capture figure, chopping signal is all not detected within 1~period of signal period 7, determines that information is
"0000000"；If being interfered by chopping signal, as shown in figure 3,1~period of signal period 4 is examined in 1~period of signal period 7
Copped wave generation and accurate judgement are measured, detects chopping signal, determines that information is ' 1111000 ', this parsing information is sentenced
Disconnected carry provides legal action message ' 1111 ', then executes legal action command, if parsing information does not carry legal movement letter
Breath ' 1111 ' does not execute legal action command then.
If copped wave state is judged as copped wave stealing, same phase is carried out with actual current using voltage rating replacement chopping voltage
Vector calculus obtains the actual power consumption amount of sampled signal.
Embodiment two：
A kind of chopping signal verification system, the system include sampling and waveform restoration unit, waveform analysis unit, copped wave class
Type judging unit and copped wave processing unit；Wherein, sampling and waveform restoration unit, waveform analysis unit, copped wave type decision list
Member and copped wave processing unit are sequentially connected with；Wherein,
Sampling and waveform restoration unit carry out real-time sampling to electric power signal, and carry out at waveform recovery to sampled signal
Reason obtains restoring sampled signal；
Waveform analysis unit carries out integrity analysis to sampled signal is restored, and judges whether recovery sampled signal is in and cuts
Wavy state；
Copped wave type judging unit judges copped wave type according to the copped wave state for restoring sampled signal；
Copped wave processing unit, according to copped wave type, to restoring, sampled signal carries out information parsing or validity is handled.
Embodiment three：
The present embodiment provides a kind of electric energy meter, the chopping signal calibrating installation in embodiment two is included in the electric energy meter.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The present invention be referring to according to the method for the present invention, the flow chart of terminal device (system) and computer program product
And/or block diagram describes.It should be understood that each process in flowchart and/or the block diagram can be realized by computer program instructions
And/or the combination of the process and/or box in box and flowchart and/or the block diagram.It can provide these computer programs to refer to
Enable the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing terminal devices with
A machine is generated, so that generating by the instruction that computer or the processor of other programmable data processing terminal devices execute
For realizing the function of being specified in one or more flows of the flowchart and/or one or more blocks of the block diagram
Device.
Certainly, these computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing terminals
In equipment computer-readable memory operate in a specific manner, so that instruction stored in the computer readable memory produces
Raw includes the manufacture of command device, which realizes in one or more flows of the flowchart and/or block diagram one
The function of being specified in a box or multiple boxes.
These computer program instructions can be also loaded into computer or other programmable data processing terminal devices, so that
Series of operation steps are executed on computer or other programmable terminal equipments to generate computer implemented processing, thus
The instruction executed on computer or other programmable terminal equipments is provided for realizing in one or more flows of the flowchart
And/or in one or more blocks of the block diagram specify function the step of.
In addition, it should be noted that,：
" one embodiment " or " embodiment " mentioned in specification means the special characteristic described in conjunction with the embodiments, structure
Or characteristic is included at least one embodiment of the present invention.Therefore, the phrase " reality that specification various places throughout occurs
Apply example " or " embodiment " the same embodiment might not be referred both to.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications can be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (10)
1. a kind of chopping signal calibration method, which is characterized in that include the following steps：
Real-time sampling is carried out to electric power signal, and waveform restoration disposal is carried out to sampled signal, obtains restoring sampled signal；
Integrity analysis is carried out to the recovery sampled signal, judges whether it is in copped wave state；
If being in copped wave state, copped wave type is judged according to the wave character for restoring sampled signal.
2. a kind of chopping signal calibration method according to claim 1, which is characterized in that described to carry out wave to sampled signal
Shape restoration disposal is specially：The voltage of each sampled point is arranged to according to time sequencing and carried out process of fitting treatment, obtains restoring and adopt
The complete waveform of sample signal.
3. a kind of chopping signal calibration method according to claim 1, which is characterized in that described pair of recovery sampled signal into
Row integrity analysis, judges whether it is in copped wave state and is specially：Judge restore whether sampled signal is complete, whether has wave
Shape mutation judges whether sample waveform is in copped wave state according to the deletion condition or waveform catastrophe that restore sampled signal.
4. a kind of chopping signal calibration method according to claim 3, which is characterized in that described according to recovery sampled signal
Wave character judge that copped wave type is specially：Copped wave type is divided into chopper communication according to the abnormal sudden change details of copped wave or is cut
Wave stealing.
5. a kind of chopping signal calibration method according to claim 4, which is characterized in that the abnormal sudden change details packet
It includes：Power line DC pulse formula copped wave with exchange rule or irregular angle copped wave；If abnormal sudden change details is power line direct current
Pulsating copped wave, then copped wave type is copped wave stealing；If the abnormal sudden change details is the regular or irregular angle copped wave of exchange,
Then copped wave type is chopper communication.
6. a kind of chopping signal calibration method according to claim 1, which is characterized in that the chopping signal calibration method
Further include：After judging copped wave type, information parsing or validity are carried out to sampled signal is restored according to copped wave type
Processing.
7. a kind of chopping signal calibration method according to claim 6, which is characterized in that it is described according to copped wave type, it is right
It restores sampled signal progress information parsing or efficiency analysis is specially：If copped wave state is chopper communication, pass through communication protocols
The communication information for carrying chopped waveform is discussed to parse；
If copped wave state is judged as copped wave stealing, same phasor1 is carried out using voltage rating replacement chopping voltage and actual current
Operation obtains the actual power consumption amount of sampled signal.
8. a kind of chopping signal verification system, which is characterized in that including sampling and waveform restoration unit, waveform analysis unit, cut
Wave type decision unit and copped wave processing unit；The sampling and waveform restoration unit, the waveform analysis unit, the copped wave
Type decision unit and the copped wave processing unit are sequentially connected with；Wherein,
The sampling and waveform restoration unit carry out real-time sampling to electric power signal, and carry out at waveform recovery to sampled signal
Reason obtains restoring sampled signal；
The waveform analysis unit carries out integrity analysis to sampled signal is restored, judges whether the recovery sampled signal is located
In copped wave state；
The copped wave type judging unit judges copped wave type according to the wave character of cutting for restoring sampled signal；
The copped wave processing unit carries out information parsing to sampled signal or validity is handled according to copped wave type.
9. a kind of chopping signal verification system according to claim 8, which is characterized in that the sampling and waveform restore list
Member includes sample circuit and micro-control module, and the sample circuit is connect with the micro-control module, the sample circuit connection
By sampling circuit, and acquire in real time by the electric power signal in sampling circuit, by sampled signal real-time transmission to micro-control module into
Traveling wave shape is restored；The micro-control module is connect with the waveform analysis unit, and the sample waveform of recovery is transmitted to the wave
The judgement of conformal analysis unit progress copped wave state.
10. a kind of electric energy detection device, which is characterized in that comprising such as any one of claim 7-9 institute in the electrical energy devices
The chopping signal calibrating installation stated.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068716A (en) * | 2019-05-16 | 2019-07-30 | 宁波三星医疗电气股份有限公司 | Stealing detection method and device |
| CN110261674A (en) * | 2019-03-14 | 2019-09-20 | 杭州海兴电力科技股份有限公司 | A kind of stealing detection method based on voltage waveform second order difference value |
| CN111679112A (en) * | 2020-06-18 | 2020-09-18 | 杭州炬华科技股份有限公司 | Electric energy meter electricity stealing type judging method and device, computer equipment and storage medium |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4782287A (en) * | 1983-11-18 | 1988-11-01 | Sigma Instruments, Inc. | Watt-hour meter |
| CN103472276B (en) * | 2013-09-16 | 2016-03-23 | 万高(杭州)科技有限公司 | Electric energy meter stealing determination methods and utilize the electric energy metered system of the method |
| CN104535813A (en) * | 2015-01-29 | 2015-04-22 | 威胜集团有限公司 | Electricity larceny prevention system and electricity larceny judgment method for large specific power transformer electricity user |
| CN105044416B (en) * | 2015-07-15 | 2018-02-23 | 深圳市华沃表计科技有限公司 | It is a kind of that stealing whether method detected using electrical energy meter electricity corrugating |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261674A (en) * | 2019-03-14 | 2019-09-20 | 杭州海兴电力科技股份有限公司 | A kind of stealing detection method based on voltage waveform second order difference value |
| CN110068716A (en) * | 2019-05-16 | 2019-07-30 | 宁波三星医疗电气股份有限公司 | Stealing detection method and device |
| CN111679112A (en) * | 2020-06-18 | 2020-09-18 | 杭州炬华科技股份有限公司 | Electric energy meter electricity stealing type judging method and device, computer equipment and storage medium |
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