CN107515332A - A kind of direct current energy metering device and method based on spectrum analysis and synchronized sampling - Google Patents
A kind of direct current energy metering device and method based on spectrum analysis and synchronized sampling Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
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Abstract
The invention discloses a kind of direct current energy metering device and method based on spectrum analysis and synchronized sampling, described device includes DC voltage sampling module, for sampling DC voltage；DC current sampling module, for sampling DC current；Frequency plot synchronization module, the sample frequency and phase for making DC voltage sampling and DC current sampling are identical；Frequency analysis module, for using Fourier transformation processing sampled signal；Direct current energy computing module, for calculating direct current energy；Ripple electric energy computing module, for calculating ripple electric energy；It is synchronous with the phase frequency of DC voltage sampling that methods described refers to the sampling of adjustment DC current, DC current and DC voltage are sampled, direct current energy is calculated after carrying out Fourier transformation processing to DC current sampled value and DC voltage sampled value respectively.
Description
Technical field
The present invention relates to electric energy metrical field, more particularly, to a kind of direct current based on spectrum analysis and synchronized sampling
Electric power meter and method.
Background technology
Direct current energy application is increasingly extensive, in the application scenarios such as the off-board charging of electric automobile, photovoltaic generation, all
Need to measure direct current energy.The metering method of customary DC electric energy is that DC voltage, DC current are sampled respectively, then directly
It is multiplied, the time is integrated.When direct current energy is stable state, this method can obtain accurate result, but direct current energy leads to
It is often dynamic, when direct current energy is in dynamic, because DC voltage and DC current may include the dynamic phenomenons such as ripple,
The sampled value obtained dc power value that is directly multiplied is all-wave and ripple power sum, it is impossible to which it is by the user that is measured to distinguish ripple
Send or absorb, error in dipping be present；Secondly, if DC voltage and DC current sampling are asynchronous, power meter can be caused
There is deviation in voltage x current value during calculation.Therefore, customary DC electric energy gauging method can not meet requirement, it is necessary to design dynamic direct current
The computational methods of electric energy.
The content of the invention
In order to solve the problems, such as that error in dipping existing for dynamic direct current energy is directed to existing for background technology, the invention provides
A kind of direct current energy metering device and method based on spectrum analysis and synchronized sampling, methods described can be realized to dynamic direct current
The synchronized sampling of electric energy, and each ripple time direct current energy is measured respectively.
A kind of direct current energy metering device based on spectrum analysis and synchronized sampling, described device include：
DC current sampling module, the DC current sampling module are used to sample DC current, the direct current
Current sample module includes signal receiving unit, and the signal receiving unit is used to be adjusted according to the frequency and phase signal of reception
The frequency and phase of straightening stream current sample；The output end of the DC current sampling module and spectrum analysis module input
It is connected；
DC voltage sampling module, the DC voltage sampling module are used to sample DC voltage, the direct current
Voltage sample module includes signal receiving unit, and the signal receiving unit is used to be adjusted according to the frequency and phase signal of reception
The frequency and phase of straightening stream voltage sample；The output end of the DC voltage sampling module and spectrum analysis module input
It is connected；
Spectrum analysis module, the spectrum analysis module are used to respectively sample DC current sampled value and DC voltage
Value carries out Fourier's processing, and the direct-current component after processing and DC voltage component are exported to direct current energy and calculate mould
Block；Ripple current component after processing and ripple voltage component are exported to ripple electric energy computing module；
Direct current energy computing module, the direct current energy computing module are used to direct current energy be calculated；And
Ripple electric energy computing module, the ripple electric energy computing module are used for each secondary ripple electricity corresponding to each harmonic
Energy.
Further, described device includes phase frequency synchronization module, the output end of the phase frequency synchronization module with
The signal receiving unit of DC current sampling module and the signal receiving unit of DC voltage sampling module are connected, the phase
Frequency synchronization module sends same frequency and phase signal to the signal receiving unit and direct current of DC current sampling module
Press the signal receiving unit of sampled signal；
Further, the DC current sampling module includes signal transmitting unit, the DC current sampling module
Signal transmitting unit is connected with the signal receiving unit of DC voltage sampling module, for making the frequency of DC voltage sampling module
And phase signal is identical with DC current sampling module；
Further, the DC voltage sampling module includes signal transmitting unit, the DC voltage sampling module
Signal transmitting unit is connected with the signal receiving unit of DC current sampling module, for making the frequency of DC current sampling module
And phase signal is identical with DC voltage sampling module；
Further, the DC voltage sampling module for can transmitting-receiving frequency and phase control signal electric resistance partial pressure type electricity
Press transformer；
Further, the DC current sampling module for can transmitting-receiving frequency and phase control signal punching current limliting it is mutual
Sensor；
Further, the phase frequency synchronization module is signal generator.
A kind of direct current energy metering method based on spectrum analysis and synchronized sampling, methods described include：
Step 1, adjustment phase place Frequency Synchronization, sample frequency and phase and DC voltage sampling that DC current samples are made
Sample frequency and phase it is identical；
Step 2, DC current to be measured is sampled, DC voltage to be measured is sampled；
Step 3, Fourier transformation processing is carried out to DC current sampled value and DC voltage sampled value respectively；And
Step 4, direct current is calculated in direct-current component and DC voltage component after being handled using Fourier transformation
Electric energy, each secondary ripple current component and each secondary ripple voltage component obtained after being handled using Fourier transformation are calculated respectively
Secondary ripple electric energy.
Further, the adjustment phase place Frequency Synchronization refers to using phase frequency synchronization module to DC current sampling module
And DC voltage sampling module sends phase frequency adjustment signal；
Further, the adjustment phase place Frequency Synchronization refers to DC current sampling module and sends its sampled signal phase and frequency
Rate to DC voltage sampling module, DC voltage sampling module adjusts according to the DC current sampled signal phase and frequency of reception
DC voltage sampling uses identical phase and frequency；
Further, the adjustment phase place Frequency Synchronization refers to DC voltage sampling module and sends its sampled signal phase and frequency
Rate to DC current sampling module, DC current sampling module adjusts according to the DC voltage sampled signal phase and frequency of reception
DC current sampling uses identical phase and frequency；
Further, the direct-current component after the Fourier transformation and the frequency of DC voltage component are 0.
Beneficial effects of the present invention are：Technical scheme, give one kind and be based on spectrum analysis and synchronized sampling
Direct current energy metering device and method, methods described improve the accuracy of direct current energy dynamic measuring, solve because dynamic
Caused by error in dipping problem, methods described distinguished direct current energy and ripple electric energy, each secondary ripple measured respectively,
It is sender or the absorption side of ripple that user can be judged according to metric results, and the direct current energy management for future provides more
Abundant technological means；Meanwhile this method is measurable direct current energy, it can also be used to measures AC energy, is alterating and direct current
Energy mixing weighing technology provides technical foundation.
Brief description of the drawings
By reference to the following drawings, the illustrative embodiments of the present invention can be more fully understood by：
Fig. 1 is a kind of direct current energy metering device with frequency plot synchronization module of the specific embodiment of the invention
Structure chart；
Fig. 2 is that a kind of DC current sampling module of the specific embodiment of the invention carries the direct current of signal transmitting unit
The structure chart of energy metering device；
Fig. 3 is that a kind of DC voltage sampling module of the specific embodiment of the invention carries the direct current of signal transmitting unit
The structure chart of energy metering device；
Fig. 4 is a kind of direct current energy metering method based on spectrum analysis and synchronized sampling of the specific embodiment of the invention
Flow chart；And
Fig. 5 is a kind of DC measurement method of application based on spectrum analysis and synchronized sampling of the specific embodiment of the invention
The off-board charger on-site calibrator of electric automobile structure chart.
Embodiment
The illustrative embodiments of the present invention are introduced with reference now to accompanying drawing, however, the present invention can use many different shapes
Formula is implemented, and is not limited to embodiment described herein, there is provided these embodiments are to disclose at large and fully
The present invention, and fully pass on the scope of the present invention to person of ordinary skill in the field.Show for what is be illustrated in the accompanying drawings
Term in example property embodiment is not limitation of the invention.In the accompanying drawings, identical cells/elements are attached using identical
Icon is remembered.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has to person of ordinary skill in the field
It is common to understand implication.Further it will be understood that the term limited with usually used dictionary, be appreciated that and its
The linguistic context of association area has consistent implication, and is not construed as Utopian or overly formal meaning.
Fig. 1 is a kind of direct current energy metering device with frequency plot synchronization module of the specific embodiment of the invention
Structure chart；Described device includes：
DC current sampling module 101, the DC current sampling module 101 are used to sample DC current, institute
State DC current sampling module and include signal receiving unit, the signal receiving unit is used for frequency and phase according to reception
The frequency and phase of signal adjustment DC current sampling；The output end of the DC current sampling module 101 and spectrum analysis
103 module inputs are connected；
DC voltage sampling module 102, the DC voltage sampling module 102 are used to sample DC voltage, institute
State DC voltage sampling module and include signal receiving unit, the signal receiving unit is used for frequency and phase according to reception
The frequency and phase of signal adjustment DC voltage sampling；The output end of the DC voltage sampling module 102 and spectrum analysis
The input of module 103 is connected；
Spectrum analysis module 103, the spectrum analysis module 103 are used for respectively by DC current sampled value and direct current
Press sampled value to carry out Fourier's processing, the direct-current component after processing and DC voltage component are exported to direct current energy meter
Calculate module 104；Ripple current component after processing and ripple voltage component are exported to ripple electric energy computing module 105；
Direct current energy computing module 104, the direct current energy computing module 104 are used to direct current energy be calculated；
Ripple electric energy computing module 105, the ripple electric energy computing module 105 are used for each secondary line corresponding to each harmonic
Ripple electric energy；
Phase frequency synchronization module 106, output end and the DC current sampling module of the phase frequency synchronization module 106
101 signal receiving unit and the signal receiving unit of DC voltage sampling module 102 are connected, the phase frequency synchronization mould
The signal receiving unit and DC voltage that block 106 sends same frequency and phase signal to DC current sampling module sample letter
Number signal receiving unit；
Further, the DC voltage sampling module for can transmitting-receiving frequency and phase control signal electric resistance partial pressure type electricity
Press transformer；
Further, the DC current sampling module for can transmitting-receiving frequency and phase control signal punching current limliting it is mutual
Sensor；
Further, the phase frequency synchronization module is signal generator.
Fig. 2 is that a kind of DC current sampling module of the specific embodiment of the invention carries the direct current of signal transmitting unit
The structure chart of energy metering device；Described device includes：
DC current sampling module 201, the DC current sampling module 201 are used to sample DC current, institute
State DC current sampling module 201 and include signal transmitting unit, the signal transmitting unit of the DC current sampling module 201 with
The signal receiving unit of DC voltage sampling module 202 is connected, for making the frequency and phase of DC voltage sampling module 202
Signal is identical with DC current sampling module 201；The output end of the DC current sampling module 201 and the mould of spectrum analysis 203
Block input is connected；
DC voltage sampling module 202, the DC voltage sampling module 202 are used to sample DC voltage, institute
State DC voltage sampling module and include signal receiving unit, the signal receiving unit is used for frequency and phase according to reception
The frequency and phase of signal adjustment DC voltage sampling；The output end of the DC voltage sampling module 202 and spectrum analysis
The input of module 203 is connected；
Spectrum analysis module 203, the spectrum analysis module 203 are used for respectively by DC current sampled value and direct current
Press sampled value to carry out Fourier's processing, the direct-current component after processing and DC voltage component are exported to direct current energy meter
Calculate module 204；Ripple current component after processing and ripple voltage component are exported to ripple electric energy computing module 205；
Direct current energy computing module 204, the direct current energy computing module 204 are used to direct current energy be calculated；
Ripple electric energy computing module 205, the ripple electric energy computing module 205 are used for each secondary line corresponding to each harmonic
Ripple electric energy；
Further, the DC voltage sampling module for can transmitting-receiving frequency and phase control signal electric resistance partial pressure type electricity
Press transformer；
Further, the DC current sampling module for can transmitting-receiving frequency and phase control signal punching current limliting it is mutual
Sensor；
Further, the phase frequency synchronization module is signal generator.
Fig. 3 is that a kind of DC voltage sampling module of the specific embodiment of the invention carries the direct current of signal transmitting unit
The structure chart of energy metering device；Described device includes：
DC current sampling module 301, the DC current sampling module 301 are used to sample DC current, institute
State DC current sampling module and include signal receiving unit, the signal receiving unit is used for frequency and phase according to reception
The frequency and phase of signal adjustment DC current sampling；The output end of the DC current sampling module 301 and spectrum analysis
303 module inputs are connected；
DC voltage sampling module 302, the DC voltage sampling module 302 are used to sample DC voltage, institute
State DC voltage sampling module 302 and include signal transmitting unit, the signal transmitting unit of the DC voltage sampling module 302 with
The signal receiving unit of DC current sampling module 301 is connected, for making the frequency and phase of DC current sampling module 301
Signal is identical with DC voltage sampling module 302；The output end and spectrum analysis module of the DC voltage sampling module 302
303 inputs are connected；
Spectrum analysis module 303, the spectrum analysis module 303 are used for respectively by DC current sampled value and direct current
Press sampled value to carry out Fourier's processing, the direct-current component after processing and DC voltage component are exported to direct current energy meter
Calculate module 304；Ripple current component after processing and ripple voltage component are exported to ripple electric energy computing module 305；
Direct current energy computing module 304, the direct current energy computing module 304 are used to direct current energy be calculated；
Ripple electric energy computing module 305, the ripple electric energy computing module 305 are used for each secondary line corresponding to each harmonic
Ripple electric energy；
Further, the DC voltage sampling module for can transmitting-receiving frequency and phase control signal electric resistance partial pressure type electricity
Press transformer；
Further, the DC current sampling module for can transmitting-receiving frequency and phase control signal punching current limliting it is mutual
Sensor；
Further, the phase frequency synchronization module is signal generator.
Fig. 4 is a kind of direct current energy metering method based on spectrum analysis and synchronized sampling of the specific embodiment of the invention
Flow chart, methods described includes：
Step 401, adjustment phase place Frequency Synchronization, the sample frequency and phase for making DC current sampling are adopted with DC voltage
The sample frequency and phase of sample are identical；
Step 402, DC current to be measured is sampled, DC voltage to be measured is sampled；
Step 403, Fourier transformation processing is carried out to DC current sampled value and DC voltage sampled value respectively；And
Step 404, direct-current component and DC voltage component after being handled using Fourier transformation are calculated directly
Electric energy is flowed, each secondary ripple current component and each secondary ripple voltage component obtained after being handled using Fourier transformation is calculated
Each secondary ripple electric energy.
Further, the adjustment phase place Frequency Synchronization refers to using phase frequency synchronization module to DC current sampling module
And DC voltage sampling module sends phase frequency adjustment signal；
Further, the adjustment phase place Frequency Synchronization refers to DC current sampling module and sends its sampled signal phase and frequency
Rate to DC voltage sampling module, DC voltage sampling module adjusts according to the DC current sampled signal phase and frequency of reception
DC voltage sampling uses identical phase and frequency；
Further, the adjustment phase place Frequency Synchronization refers to DC voltage sampling module and sends its sampled signal phase and frequency
Rate to DC current sampling module, DC current sampling module adjusts according to the DC voltage sampled signal phase and frequency of reception
DC current sampling uses identical phase and frequency；
Further, the direct-current component after the Fourier transformation and the frequency of DC voltage component are 0.
Fig. 5 is a kind of DC measurement method of application based on spectrum analysis and synchronized sampling of the specific embodiment of the invention
The off-board charger on-site calibrator of electric automobile structure chart.
The off-board charger on-site calibrator of electric automobile is used to carry out scene to the off-board charger of electric automobile
Electric energy metrical, the DC voltage sampling of the on-site calibrator use electric resistance partial pressure type voltage transformer, and DC current sampling makes
With straight-through current transformer, using impulsive synchronization method to the straight-through current transformer and electric resistance partial pressure type voltage mutual inductance
The phase and frequency of device synchronizes；The DC voltage sampled result and DC current sampled result are become by Fourier analysis
Get each ripple time voltage and each ripple primary current in return, the voltage of each ripple time and Ge Bo primary currents are correspondingly input to the electricity of each ripple time
The secondary electric energy of each ripple can be calculated in computing module.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (12)
1. a kind of direct current energy metering device based on spectrum analysis and synchronized sampling, described device include：
DC current sampling module, the DC current sampling module are used to sample DC current, the DC current
Sampling module includes signal receiving unit, and the signal receiving unit is used to be adjusted directly according to the frequency and phase signal of reception
Flow the frequency and phase of current sample；The output end of the DC current sampling module and spectrum analysis module input phase
Even；
DC voltage sampling module, the DC voltage sampling module are used to sample DC voltage, the DC voltage
Sampling module includes signal receiving unit, and the signal receiving unit is used to be adjusted directly according to the frequency and phase signal of reception
Flow the frequency and phase of voltage sample；The output end of the DC voltage sampling module and spectrum analysis module input phase
Even；
Spectrum analysis module, the spectrum analysis module are used to respectively enter DC current sampled value and DC voltage sampled value
Row Fourier is handled, and the direct-current component after processing and DC voltage component are exported to direct current energy computing module；Will
Ripple current component and ripple voltage component after processing are exported to ripple electric energy computing module；
Direct current energy computing module, the direct current energy computing module are used to direct current energy be calculated；And
Ripple electric energy computing module, the ripple electric energy computing module are used for each secondary ripple electric energy corresponding to each harmonic.
2. device according to claim 1, it is characterised in that：Described device includes phase frequency synchronization module, the phase
The output end of bit frequency synchronization module and the signal receiving unit of DC current sampling module and DC voltage sampling module
Signal receiving unit is connected, and the phase frequency synchronization module sends same frequency and phase signal to DC current sampling module
Signal receiving unit and DC voltage sampled signal signal receiving unit.
3. device according to claim 1, it is characterised in that：The DC current sampling module includes signal and sends list
Member, the signal transmitting unit of the DC current sampling module are connected with the signal receiving unit of DC voltage sampling module, use
It is identical with DC current sampling module in the frequency and phase signal for making DC voltage sampling module.
4. device according to claim 1, it is characterised in that：The DC voltage sampling module includes signal and sends list
Member, the signal transmitting unit of the DC voltage sampling module are connected with the signal receiving unit of DC current sampling module, use
It is identical with DC voltage sampling module in the frequency and phase signal for making DC current sampling module.
5. device according to claim 1, it is characterised in that：The DC voltage sampling module is can transmitting-receiving frequency and phase
The electric resistance partial pressure type voltage transformer of position control signal.
6. device according to claim 1, it is characterised in that：The DC current sampling module is can transmitting-receiving frequency and phase
The punching current limliting transformer of position control signal.
7. device according to claim 1, it is characterised in that：The phase frequency synchronization module is signal generator.
8. a kind of direct current energy metering method based on spectrum analysis and synchronized sampling, methods described include：
Step 1, adjustment phase place Frequency Synchronization, the sample frequency and phase for making DC current sampling are adopted with what DC voltage sampled
Sample frequency and phase are identical；
Step 2, DC current to be measured is sampled, DC voltage to be measured is sampled；
Step 3, Fourier transformation processing is carried out to DC current sampled value and DC voltage sampled value respectively；And
Step 4, direct current energy is calculated in direct-current component and DC voltage component after being handled using Fourier transformation；
Each secondary line is calculated in each secondary ripple current component and each secondary ripple voltage component obtained after being handled using Fourier transformation
Ripple electric energy.
9. according to the method for claim 8, it is characterised in that：The adjustment phase place Frequency Synchronization refers to same using phase frequency
Walk module and send phase frequency adjustment signal to DC current sampling module and DC voltage sampling module.
10. according to the method for claim 8, it is characterised in that：The adjustment phase place Frequency Synchronization refers to DC current sampling
Module sends its sampled signal phase and frequency to DC voltage sampling module, direct current of the DC voltage sampling module according to reception
Current sampling signal phase and frequency adjustment DC voltage sampling use identical phase and frequency.
11. according to the method for claim 8, it is characterised in that：The adjustment phase place Frequency Synchronization refers to DC voltage sampling
Module sends its sampled signal phase and frequency to DC current sampling module, direct current of the DC current sampling module according to reception
Voltage sampling signal phase and frequency adjustment DC current sampling use identical phase and frequency.
12. according to the method for claim 8, it is characterised in that：Direct-current component after the Fourier transformation and
The frequency of DC voltage component is 0.
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| CN201710534532.7A CN107515332B (en) | 2017-07-03 | 2017-07-03 | Direct current electric energy metering device and method based on frequency spectrum analysis and synchronous sampling |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111537789A (en) * | 2020-05-09 | 2020-08-14 | 湖南省计量检测研究院 | Direct current electric energy metering device and method based on signal separation and accurate integration |
| CN113325233A (en) * | 2021-06-02 | 2021-08-31 | 云南电网有限责任公司电力科学研究院 | System and method for modulating and measuring ripple electric energy in direct current electric energy |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04252505A (en) * | 1991-01-29 | 1992-09-08 | Fujitsu Ltd | Power supply ripple measurement device |
| CN102998523A (en) * | 2012-12-25 | 2013-03-27 | 上海贝岭股份有限公司 | Harmonic power calculating method for electric energy measuring |
| CN103364601A (en) * | 2012-03-31 | 2013-10-23 | 盛吉高科（北京）科技有限公司 | Period average and delay window-based electric energy measurement method |
-
2017
- 2017-07-03 CN CN201710534532.7A patent/CN107515332B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04252505A (en) * | 1991-01-29 | 1992-09-08 | Fujitsu Ltd | Power supply ripple measurement device |
| CN103364601A (en) * | 2012-03-31 | 2013-10-23 | 盛吉高科（北京）科技有限公司 | Period average and delay window-based electric energy measurement method |
| CN102998523A (en) * | 2012-12-25 | 2013-03-27 | 上海贝岭股份有限公司 | Harmonic power calculating method for electric energy measuring |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111537789A (en) * | 2020-05-09 | 2020-08-14 | 湖南省计量检测研究院 | Direct current electric energy metering device and method based on signal separation and accurate integration |
| WO2021227408A1 (en) * | 2020-05-09 | 2021-11-18 | 湖南省计量检测研究院 | Direct-current electric energy metering apparatus and method based on signal separation and precise integration |
| CN113325233A (en) * | 2021-06-02 | 2021-08-31 | 云南电网有限责任公司电力科学研究院 | System and method for modulating and measuring ripple electric energy in direct current electric energy |
| CN113325233B (en) * | 2021-06-02 | 2024-04-09 | 云南电网有限责任公司电力科学研究院 | System and method for modulating and measuring ripple electric energy in direct-current electric energy |
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