CN110082701A - A kind of electric energy meter measurement error on-line monitoring circuit and method based on copper-manganese sampling - Google Patents
A kind of electric energy meter measurement error on-line monitoring circuit and method based on copper-manganese sampling Download PDFInfo
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- CN110082701A CN110082701A CN201910394594.1A CN201910394594A CN110082701A CN 110082701 A CN110082701 A CN 110082701A CN 201910394594 A CN201910394594 A CN 201910394594A CN 110082701 A CN110082701 A CN 110082701A
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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 present invention relates to a kind of electric energy meter measurement errors based on copper-manganese sampling to monitor circuit on-line, it is characterised in that: by copper-manganese resistance, ac current source, programmable gain amplifier, analog-digital converter, low-pass filter and error monitoring module composition；Further relate to a kind of electric energy meter measurement error on-line monitoring method based on copper-manganese sampling.The present invention is not on the basis of influencing electric energy meter normal function of measuring, simply and effectively realize the error on-line monitoring function of family single-phase electric energy meter, the efficiency for improving electric energy meter detection saves the manpower and material resources put into needed for detection work, also improves the initiative of electric energy metering error improvement.
Description
Technical field
The invention belongs to Intelligent electric-energy metering fields, are related to a kind of on-line monitoring method of electric energy meter measurement error, especially
It is a kind of electric energy meter measurement error on-line monitoring circuit and method based on copper-manganese sampling.
Background technique
The accuracy and reliability of electrical energy measurement is the basis of grid company business revenue clearing, maintains entire electricity market order
The stabilization of sequence, while being also the production of power industry tissue, the important evidence for formulating decision.Conversely speaking, to electric energy metering device
Error administer not as not only resulting in generation clearing deviation and cause direct economic loss, can also be lost with enterprise one by one
The generation of letter event reduces the credit of power grid enterprises indirectly, or even influences corporate image.Currently, the metering accuracy of electric energy meter
Need to patrol artificial blanket type or sampling observation by way of maintained, huge not only for the not strong workload of property, it is even more impossible to timely
Reflect the distribution situation of overall operation error.In order to solve the above problem, the present invention proposes a kind of electric energy meter based on copper-manganese sampling
Measurement error on-line monitoring method, the perfect angle of Cong Huyong single-phase electric energy meter own functionality, which is set out, solves electric energy metering error
The imeliness problem of monitoring.
Copper-manganese resistance is the sample resistance that is in daily use in current measurement, and manganese-copper filament is equivalent to a low values of resistors, electric at this time
Pressure is directly proportional to electric current, it is characterized in that temperature drift amount is very small.By test, pass through on the health copper-manganese resistance wire of 1 Ω
About 2A electric current, is heated up due to caused by the heat of generation, can only cause the change in resistance of 0.02 Ω or so, is risen to the stabilization of electric current
Critically important effect.On the other hand, health copper-manganese resistance wire heat dissipation performance is good, can radiate faster when passing through high current, can
The further temperature drift bring that reduces influences.Copper-manganese sampling is that the entrance of electric energy meter metering and electric energy meter generate error
Initiator elements.Error on-line monitoring is carried out from the element, the evaluation of overall scientific can be made to electric energy meter error.
In conclusion the on-line monitoring of electric energy meter measurement error loses promotion stoichiometric level, reduction clearing, maintains market
Order, promotion corporate image all have significance.Currently, electric energy meter measurement error on-line monitoring technique is still in experimental study
Stage not yet has the condition to put it into commercial operation, needs the error for proposing to be suitable for family single-phase electric energy meter on-line monitoring solution party
Case.
By the retrieval to patent document, patent document identical with present patent application is not found.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of designs rationally, accurate measurement and stabilization can
The electric energy meter measurement error on-line monitoring circuit and method based on copper-manganese sampling leaned on.
The present invention solves its technical problem and adopts the following technical solutions to achieve:
A kind of electric energy meter measurement error on-line monitoring circuit based on copper-manganese sampling, it is characterised in that: by copper-manganese resistance, hand over
Current source, programmable gain amplifier, analog-digital converter, low-pass filter and error monitoring module composition are flowed,
The copper-manganese resistance is used for separating flow sampling, obtains measurable low current signal, one end is connected to electric energy meter
Firewire input terminal, the other end are connected to electric energy meter firewire outlet terminal；
Reference current signal needed for the ac current source is used to provide error on-line monitoring, both ends are separately connected
In copper-manganese resistance both ends, separately there is digital signal output to be all the way connected to the respective input of error monitoring module；
The programmable gain amplifier, decays for signal caused by update the system, and anode is connected to electric energy meter
Firewire input terminal, cathode are connected to electric energy meter firewire outlet terminal；
The analog-digital converter, the analog current signal for obtaining separating flow sampling is converted to digital signal, defeated
Enter the output end that end is connected to programmable gain amplifier, output end divides two-way, is connected to the input of low-pass filter all the way
End, another way are connected to the input terminal of error monitoring module, are furnished with a reference voltage source on the analog-digital converter；
The low-pass filter is used for filter high-frequency noise signal, and input terminal is connected to the output of analog-digital converter
End, output end are connected to an input terminal of electric energy metering module, are used for electrical energy measurement；
The error monitoring module is used for comparison reference signal and monitoring signals, to generate error on-line monitoring alarm letter
Number, two-way input terminal is connected to the digital signal output end of ac current source and the output end of analog-digital converter.
A kind of electric energy meter measurement error on-line monitoring method based on copper-manganese sampling, it is characterised in that: including following method:
Step 1: according to program setting, reference current is injected to copper-manganese resistance by ac current source, to generate error
The analog test signal of on-line monitoring；
Step 2: analog test signal input programmable gain amplifier is amplified into presupposition multiple to meet normal electricity
The needs that can be measured；
Step 3: amplified analog test signal input analog-to-digital converter is converted into digital test signal；
Step 4: digital test signal is input to error monitoring module, extracts ac current source through high-pass filter
The ohmically test electric current of copper-manganese is acted on, test electric current and reference current are obtained into error criterion as difference, can be weighed in this way
Multiple operation repeatedly, to obtain multiple error criterion, then takes its average value as final error criterion；
Step 5: in error monitoring module, whether error in judgement criterion is greater than preset value, is the then big alarm of output error
Signal carries out the operation of step 4 again after otherwise postponing the time of setting.
The advantages and positive effects of the present invention are:
1. the electric energy meter measurement error on-line monitoring circuit and method, this method based on copper-manganese sampling are not influencing electric energy
On the basis of the normal function of measuring of table, the error on-line monitoring function of family single-phase electric energy meter is simply and effectively realized, is improved
The efficiency of electric energy meter monitoring, saves the manpower and material resources put into needed for monitoring, also improves electric energy metering error improvement
Initiative.
2. the design of the invention is scientific and reasonable, has and improve detection efficiency, use manpower and material resources sparingly, accurate measurement and reliable and stable
The advantages that, it is a kind of electric energy meter measurement error on-line monitoring circuit and method based on copper-manganese sampling with higher innovation.
Detailed description of the invention
Fig. 1 is the circuit diagram of present invention on-line monitoring circuit；
Fig. 2 is the method flow diagram of on-line monitoring method of the present invention.
Specific embodiment
The embodiment of the present invention is further described below in conjunction with attached drawing:
A kind of electric energy meter measurement error on-line monitoring circuit based on copper-manganese sampling, innovation are: by copper-manganese electricity
Resistance, ac current source, programmable gain amplifier, analog-digital converter, low-pass filter and error monitoring module composition,
The copper-manganese resistance is used for separating flow sampling, obtains measurable low current signal, one end is connected to electric energy meter
Firewire input terminal, the other end are connected to electric energy meter firewire outlet terminal；
Reference current signal needed for the ac current source is used to provide error on-line monitoring, both ends are separately connected
In copper-manganese resistance both ends, separately there is digital signal output to be all the way connected to the respective input of error monitoring module；The alternating current
The model LTC6995-1 in source, is produced by Analog company.
The programmable gain amplifier PGA, decays for signal caused by update the system, and anode is connected to electric energy
Table firewire input terminal, cathode are connected to electric energy meter firewire outlet terminal；The model LTC6910-1 of the PGA, by Analog public affairs
Department's production.
The analog-digital converter ADC, the analog current signal for obtaining separating flow sampling are converted to digital signal,
Input terminal is connected to the output end of programmable gain amplifier, and output end divides two-way, is connected to the defeated of low-pass filter all the way
Enter end, another way is connected to the input terminal of error monitoring module, is furnished with a reference voltage source on the analog-digital converter；The ADC
Model AD7791, produced by Analog company.
The low-pass filter is used for filter high-frequency noise signal, and input terminal is connected to the output of analog-digital converter
End, output end are connected to an input terminal of electric energy metering module, are used for electrical energy measurement；The model of the low-pass filter
LTC1062 is produced by Analog company.
The error monitoring module is used for comparison reference signal and monitoring signals, to generate error on-line monitoring alarm letter
Number, two-way input terminal is connected to the digital signal output end of ac current source and the output end of analog-digital converter.
A kind of electric energy meter measurement error on-line monitoring method based on copper-manganese sampling, innovation are: including as follows
Method:
Step 1: according to program setting, reference current is injected to copper-manganese resistance by ac current source, to generate error
The analog test signal of on-line monitoring；
Step 2: analog test signal input programmable gain amplifier is amplified into presupposition multiple to meet normal electricity
The needs that can be measured；
Step 3: amplified analog test signal input analog-to-digital converter is converted into digital test signal；
Step 4: digital test signal is input to error monitoring module, extracts ac current source through high-pass filter
The ohmically test electric current of copper-manganese is acted on, test electric current and reference current are obtained into error criterion as difference, can be weighed in this way
Multiple operation repeatedly, to obtain multiple error criterion, then takes its average value as final error criterion；
Step 5: in error monitoring module, whether error in judgement criterion is greater than preset value, is the then big alarm of output error
Signal carries out the operation of step 4 again after otherwise postponing the time of setting.
This method simply and effectively realizes family single-phase electric energy on the basis of not influencing electric energy meter normal function of measuring
The error of table monitors function on-line, improves the efficiency of electric energy meter monitoring, saves the manpower and material resources put into needed for monitoring,
Also improve the initiative of electric energy metering error improvement.
Although disclosing the embodiment of the present invention and attached drawing for the purpose of illustration, those skilled in the art can be managed
Solution: do not departing from the present invention and spirit and scope of the appended claims in, various substitutions, changes and modifications be all it is possible,
Therefore, the scope of the present invention is not limited to the embodiment and attached drawing disclosure of that.
Claims (2)
1. a kind of electric energy meter measurement error based on copper-manganese sampling monitors circuit on-line, it is characterised in that: by copper-manganese resistance, exchange
Current source, programmable gain amplifier, analog-digital converter, low-pass filter and error monitoring module composition,
The copper-manganese resistance is used for separating flow sampling, obtains measurable low current signal, one end is connected to electric energy meter firewire
Input terminal, the other end are connected to electric energy meter firewire outlet terminal；
Reference current signal needed for the ac current source is used to provide error on-line monitoring, both ends are connected to manganese
Copper resistance both ends separately have digital signal output to be all the way connected to the respective input of error monitoring module；
The programmable gain amplifier, decays for signal caused by update the system, and anode is connected to electric energy meter firewire
Input terminal, cathode are connected to electric energy meter firewire outlet terminal；
The analog-digital converter, the analog current signal for obtaining separating flow sampling are converted to digital signal, input terminal
It is connected to the output end of programmable gain amplifier, output end divides two-way, is connected to the input terminal of low-pass filter all the way, separately
It is connected to the input terminal of error monitoring module all the way, is furnished with a reference voltage source on the analog-digital converter；
The low-pass filter is used for filter high-frequency noise signal, and input terminal is connected to the output end of analog-digital converter,
Output end is connected to an input terminal of electric energy metering module, is used for electrical energy measurement；
The error monitoring module is used for comparison reference signal and monitoring signals, to generate error on-line monitoring alarm signal,
Its two-way input terminal is connected to the digital signal output end of ac current source and the output end of analog-digital converter.
2. a kind of electric energy meter measurement error on-line monitoring method according to claim 1 based on copper-manganese sampling, feature
It is: including following method:
Step 1: according to program setting, reference current is injected to copper-manganese resistance by ac current source, so that it is online to generate error
The analog test signal of monitoring；
Step 2: analog test signal input programmable gain amplifier is amplified into presupposition multiple to meet in terms of normal electric energy
The needs of amount；
Step 3: amplified analog test signal input analog-to-digital converter is converted into digital test signal；
Step 4: being input to error monitoring module for digital test signal, extracts ac current source effect through high-pass filter
In the ohmically test electric current of copper-manganese, test electric current and reference current are obtained into error criterion as difference, can repeat to grasp in this way
Make repeatedly, to obtain multiple error criterion, then to take its average value as final error criterion；
Step 5: in error monitoring module, whether error in judgement criterion is greater than preset value, is that then the big alarm of output error is believed
Number, the operation of step 4 is carried out after otherwise postponing the time of setting again.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910394594.1A CN110082701A (en) | 2019-05-13 | 2019-05-13 | A kind of electric energy meter measurement error on-line monitoring circuit and method based on copper-manganese sampling |
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| CN201910394594.1A CN110082701A (en) | 2019-05-13 | 2019-05-13 | A kind of electric energy meter measurement error on-line monitoring circuit and method based on copper-manganese sampling |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110988783A (en) * | 2019-12-27 | 2020-04-10 | 广东电科院能源技术有限责任公司 | Intelligent electric meter precision online monitoring method and device |
| CN113552529A (en) * | 2021-07-30 | 2021-10-26 | 国网山东省电力公司德州供电公司 | Self-calibration system and method based on intelligent electric energy meter online monitoring |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201222076Y (en) * | 2008-06-05 | 2009-04-15 | 上海复旦微电子股份有限公司 | Electric force metering circuit for preventing electricity from theft |
| WO2012174693A1 (en) * | 2011-06-20 | 2012-12-27 | 辽宁省电力有限公司丹东供电公司 | Electric energy meter on-line detection method |
| CN204989263U (en) * | 2015-10-13 | 2016-01-20 | 厦门通致达电气科技有限公司 | Remote monitoring electric energy meter |
| CN106908645A (en) * | 2017-02-23 | 2017-06-30 | 国网天津节能服务有限公司 | A kind of method for overcoming direct current energy meter current divider Seebeck effect |
| CN108535539A (en) * | 2018-07-06 | 2018-09-14 | 南方电网科学研究院有限责任公司 | A kind of electric energy meter and its AFE(analog front end) meeting IR46 standards |
| CN109061549A (en) * | 2018-10-12 | 2018-12-21 | 浙江正泰仪器仪表有限责任公司 | A kind of electric energy meter detecting measurement error |
| CN109375151A (en) * | 2018-12-24 | 2019-02-22 | 广东电网有限责任公司 | The monitoring channel scheduling method and device of electric energy meter measurement error on-line monitoring technique |
| CN109683015A (en) * | 2019-01-15 | 2019-04-26 | 广州供电局有限公司 | Intelligent electric energy meter |
-
2019
- 2019-05-13 CN CN201910394594.1A patent/CN110082701A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201222076Y (en) * | 2008-06-05 | 2009-04-15 | 上海复旦微电子股份有限公司 | Electric force metering circuit for preventing electricity from theft |
| WO2012174693A1 (en) * | 2011-06-20 | 2012-12-27 | 辽宁省电力有限公司丹东供电公司 | Electric energy meter on-line detection method |
| CN204989263U (en) * | 2015-10-13 | 2016-01-20 | 厦门通致达电气科技有限公司 | Remote monitoring electric energy meter |
| CN106908645A (en) * | 2017-02-23 | 2017-06-30 | 国网天津节能服务有限公司 | A kind of method for overcoming direct current energy meter current divider Seebeck effect |
| CN108535539A (en) * | 2018-07-06 | 2018-09-14 | 南方电网科学研究院有限责任公司 | A kind of electric energy meter and its AFE(analog front end) meeting IR46 standards |
| CN109061549A (en) * | 2018-10-12 | 2018-12-21 | 浙江正泰仪器仪表有限责任公司 | A kind of electric energy meter detecting measurement error |
| CN109375151A (en) * | 2018-12-24 | 2019-02-22 | 广东电网有限责任公司 | The monitoring channel scheduling method and device of electric energy meter measurement error on-line monitoring technique |
| CN109683015A (en) * | 2019-01-15 | 2019-04-26 | 广州供电局有限公司 | Intelligent electric energy meter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110988783A (en) * | 2019-12-27 | 2020-04-10 | 广东电科院能源技术有限责任公司 | Intelligent electric meter precision online monitoring method and device |
| CN113552529A (en) * | 2021-07-30 | 2021-10-26 | 国网山东省电力公司德州供电公司 | Self-calibration system and method based on intelligent electric energy meter online monitoring |
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Application publication date: 20190802 |
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