CN109683015A - Intelligent electric energy meter - Google Patents
Intelligent electric energy meter Download PDFInfo
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- CN109683015A CN109683015A CN201910034276.4A CN201910034276A CN109683015A CN 109683015 A CN109683015 A CN 109683015A CN 201910034276 A CN201910034276 A CN 201910034276A CN 109683015 A CN109683015 A CN 109683015A
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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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- 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 intelligent electric energy meters, including signal feedback module, modulus of conversion group, signal sampling mould group, measure monitor mould group and processor；The first electric signal is inputted to modulus of conversion group by signal feedback module；Signal sampling mould group acquires the second electric signal of modulus of conversion group output, and by the second electric signal transmission to measure monitor mould group；Measure monitor mould group obtains the first electric signal and the second electric signal, target output electric signal is calculated according to the first electric signal, and be compared processing to the second electric signal and target output electric signal, generates error checking parameter；Processor is according to the comparison result of error checking parameter and criteria check parameter, detect measurement error misalignment failure, to realize while intelligent electric energy meter carries out alternating current electrical energy measurement, real-time monitoring and self diagnosis are carried out to measurement error, and do not influence the function and contour structures of existing intelligent electric energy meter, testing cost is saved, it is easy for installation simple.
Description
Technical field
The present invention relates to apparatus measures fields, more particularly to a kind of intelligent electric energy meter.
Background technique
Electric energy meter is the instrument for measuring electric energy.Intelligent electric energy meter is using microprocessor or microcontroller chip as core
The heart stores a large amount of metrical information and has the instrument that measurement result is analyzed in real time, handles and judged, and is practical
Electric energy bring precise measurement.
With the long-time service of electric energy meter, electric energy meter can generate error, need periodic detection.Traditional intelligent electric energy meter
Electric energy metering error is detected by external dedicated error verification device, has especially been mounted on the intelligent electric energy at user scene
Table, it is necessary to which factory is dismantled go back in timing or scene is detected with dedicated error verification device, expends a large amount of manpower and material resources, and can not
The overproof situation of the error of real-time monitoring intelligent electric energy meter.
Summary of the invention
Based on this, it is necessary to can not real-time monitoring intelligent electric energy meter measurement error aiming at the problem that, a kind of intelligence is provided
Electric energy meter.
The embodiment of the present invention provides a kind of intelligent electric energy meter characterized by comprising signal feedback module, modulus of conversion group,
Signal sampling mould group, measure monitor mould group and processor；
Signal feedback module connects the input terminal of modulus of conversion group, and signal feedback module inputs the first telecommunications to modulus of conversion group
Number；
The output end of the input terminal connection modulus of conversion group of signal sampling mould group, signal sampling mould group acquire the output of modulus of conversion group
The second electric signal, and by the second electric signal transmission to measure monitor mould group；
The output end of measure monitor mould group connection signal feedback module and the output end of signal sampling mould group, for obtaining the
Target output electric signal is calculated according to the first electric signal in one electric signal and the second electric signal, and to the second electric signal and mesh
Mark output electric signal is compared processing, generates error checking parameter, and error checking parameter is transmitted to processor, target is defeated
Electric signal is the converted mould group of the first electric signal treated corresponding theoretical output electric signal out；
Processor connects measure monitor mould group, for the comparison result according to error checking parameter and criteria check parameter,
Detect measurement error misalignment failure.
Modulus of conversion group includes voltage conversion unit in one of the embodiments, and signal feedback module includes Voltage Feedback
Unit, signal sampling mould group includes voltage sampling unit；
Voltage feedback unit connects the input terminal of voltage conversion unit, and voltage feedback unit is to voltage conversion unit input the
The first voltage signal of one setpoint frequency；
The output end of the input terminal connection voltage conversion unit of voltage sampling unit, the conversion of voltage sampling unit collection voltages
The second voltage signal of unit output, and second voltage signal is exported to measure monitor mould group.
Modulus of conversion group includes current conversion unit in one of the embodiments, and signal feedback module includes current feedback
Unit, signal sampling mould group includes current sampling unit；
Current feedback unit connects the input terminal of current conversion unit, and current feedback unit is to current conversion unit input the
First current signal of two setpoint frequencies；
The output end of the input terminal connection current conversion unit of current sampling unit, current sampling unit acquire electric current conversion
Second current signal of unit output, and the second current signal is exported to measure monitor mould group.
Measure monitor mould group includes detecting signal unit and error monitoring unit in one of the embodiments,；
Detecting signal unit is separately connected the output end of signal feedback module and the output end of signal sampling mould group, for obtaining
Take the first electric signal and the second electric signal, according to the first electric signal obtain target output electric signal, by target output electric signal and
Second electric signal is exported to error monitoring unit；
Error monitoring unit connection signal detection unit, for comparing the second electric signal and target output electric signal
Compared with, generation error checking parameter, and error checking parameter is transmitted to processor.
Voltage conversion unit includes resistor network in one of the embodiments,.
Current conversion unit includes copper-manganese resistance or current transformer in one of the embodiments,.
In one of the embodiments, further include: communications module；
Communications module connects processor, for receiving the measurement error misalignment fault message of processor transmission, and to terminal
Equipment transmits measurement error misalignment fault message.
Communications module includes infrared communication unit, RS485 communication unit and carrier communication list in one of the embodiments,
First is one or more.
It in one of the embodiments, further include relay protection mould group；
Relay protection mould group connects processor；
Processor is also used to control relay protection mould group and executes power-off protection.
It in one of the embodiments, further include display module；
Display module connects processor, and the signal for being exported according to processor carries out information and shows.
A kind of intelligent electric energy meter provided by the above embodiment inputs the first telecommunications to modulus of conversion group by signal feedback module
Number, the second electric signal and target output electric signal are carried out processing and generate error by the second electric signal of acquisition modulus of conversion group output
The comparison result of error checking parameter and criteria check parameter is detected measurement error misalignment failure by checking parameter, to realize
While intelligent electric energy meter carries out alternating current electrical energy measurement, real-time monitoring and self diagnosis are carried out to measurement error, and do not influenced existing
The function and contour structures of some intelligent electric energy meters save testing cost, easy for installation simple.
Detailed description of the invention
Fig. 1 is a kind of first structure diagram of intelligent electric energy meter provided in an embodiment of the present invention；
Fig. 2 is a kind of the second structural schematic diagram of intelligent electric energy meter provided in an embodiment of the present invention；
Fig. 3 is a kind of third structural schematic diagram of intelligent electric energy meter provided in an embodiment of the present invention；
Fig. 4 is a kind of the 4th structural schematic diagram of intelligent electric energy meter provided in an embodiment of the present invention.
Specific embodiment
It to facilitate the understanding of the present invention, below will be to invention is more fully described.But the present invention can be to be permitted
Mostly different form is realized, however it is not limited to embodiment described herein.On the contrary, purpose of providing these embodiments is makes
It is more thorough and comprehensive to the understanding of the disclosure.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.
It should be noted that it can be directly to separately when an element is considered as " connection " another element
One element and it is in combination be integrated, or may be simultaneously present centering elements.The term " includes " of the embodiment of the present invention and
Its any deformation, it is intended that cover and non-exclusive include.Such as contain the process of series of steps or (mould group) unit, side
Method, system, product or equipment are not limited to listed step or unit, but optionally further comprising the step of not listing
Or unit, or optionally further comprising other step or units intrinsic for these process, methods, product or equipment.
Referenced herein " embodiment " is it is meant that a particular feature, structure, or characteristic described can wrap in conjunction with the embodiments
It is contained at least one embodiment of the application.Each position in the description occur the phrase might not each mean it is identical
Embodiment, nor the independent or alternative embodiment with other embodiments mutual exclusion.Those skilled in the art explicitly and
Implicitly understand, embodiment described herein can be combined with other embodiments.
Referenced herein " multiple " refer to two or more."and/or", the association for describing affiliated partner are closed
System indicates may exist three kinds of relationships, for example, A and/or B, can indicate: individualism A exists simultaneously A and B, individualism
These three situations of B.Character "/" typicallys represent the relationship that forward-backward correlation object is a kind of "or".
Fig. 1 is a kind of first structure diagram of intelligent electric energy meter provided in an embodiment of the present invention, as shown in Figure 1, the intelligence
Can electric energy meter include: signal feedback module 110, modulus of conversion group 120, signal sampling mould group 130, measure monitor mould group 140 and
Processor 150.
Signal feedback module 110 connects the input terminal of modulus of conversion group 120, and signal feedback module 110 is defeated to modulus of conversion group 120
Enter the first electric signal；The output end of the input connection modulus of conversion group 120 of signal sampling mould group 130, signal sampling mould group 130 acquire
The second electric signal that modulus of conversion group 120 exports, and by the second electric signal transmission to measure monitor mould group 140；Measure monitor mould group
The output end of 140 connection signal feedback modules 110 and the output end of signal sampling mould group 130, for obtain the first electric signal and
Second electric signal obtains target output electric signal according to the first electric signal, and to the second electric signal and target export electric signal into
Row is relatively handled, and generates error checking parameter, and error checking parameter is transmitted to processor 150, target output electric signal is
The corresponding theoretical output electric signal of first electric signal；Processor 150 connects measure monitor mould group 140, for according to error school
The comparison result of parameter Yu criteria check parameter is tested, measurement error misalignment failure is detected.
Intelligent electric energy meter includes voltage channel and current channel.Metering by detecting the voltage channel of intelligent electric energy meter misses
The measurement error of difference and current channel judges the measurement error misalignment failure of intelligent electric energy meter.
In embodiment, according to the type of signal detection, signal feedback module 110, modulus of conversion group 120 and signal sampling mould
Group 130 can have one or more.For example, can only have when only detecting the measurement error of voltage channel or current channel
One signal feedback module, 110, modulus of conversion groups 120 or a signal sampling mould group 130.In detection voltage channel and electric current
It may include that two or more signal feedback modules 110, modulus of conversion group 120 and signal are adopted when the measurement error in channel
Original mold group 130 is respectively to detect voltage channel and current channel.Certainly, voltage channel or current channel are only being detected
It also may include multiple signal feedback modules 110, modulus of conversion group 120 and signal sampling mould group 130, with respectively when measurement error
Detection voltage channel or current channel are taken multiple measurements.
Signal feedback module 110 is used for 120 input test electric signal of modulus of conversion group, i.e. the first electric signal.First telecommunications
Number include voltage signal and current signal.In embodiment, modulus of conversion group 120 can also connect utility grid, for alternating current
The electric signal of power grid input is converted.Second electric signal includes corresponding after handling with the converted mould group 120 of the first electric signal
Reality output electric signal and/or utility grid input the converted mould group of electric signal treated corresponding reality output electricity
Signal.For example, the second electric signal is the first electric signal and alternating current when intelligent electric energy meter connection utility grid carries out electrical energy measurement
The converted mould group of electric signal of power grid input treated mixing electric signal, if intelligent electric energy meter be not attached to utility grid and into
Row error diagnostics, the second electric signal at this time are that the converted mould group of the first electric signal handles reality output electric signal.
Modulus of conversion group 120 is used to carry out partial pressure to the electric signal that the first electric signal or utility grid input or shunting is handled,
Different according to the type of the electric signal of input, modulus of conversion group 120 can be voltage transformer, current transformer, resistor network, manganese
Copper resistance etc..
Signal sampling mould group 130 is used for that treated that electric signal samples to converted mould group 120.Measure monitor mould group
140 pairs of collected electric signals of signal sampling mould group 130 are compared processing with target output electric signal, obtain error checking ginseng
Number, wherein error checking parameter reacts the decaying situation of target output electric signal.
It should be noted that the second electric signal is at the converted mould group of electric signal of the first electric signal and utility grid input
When mixing electric signal after reason, the converted mould group processing reality output telecommunications of the first electric signal is isolated from the second electric signal
Number.In embodiment, different from the signal frequency for the electric signal that utility grid inputs using the signal frequency of the first electric signal, from
And it realizes and isolates the converted mould group processing reality output electric signal of the first electric signal from mixing electric signal.It optionally, can be with
It is different from the signal frequency of the first electric signal according to utility grid input terminal electric signal in mixing electric signal, extract setpoint frequency
Electric signal, wherein the setpoint frequency is identical as the signal frequency of the first electric signal.
Measure monitor mould group in embodiment includes with the chip and its peripheral circuit measured with processing function, such as
The metering chips such as RN8209C, ADE9153A, ADE7752A.Error checking parameter is according to corresponding with the first electric signal through turning
Mold changing group treated reality output electric signal and target output electric signal obtain.In embodiment, error checking parameter=with
The corresponding converted mould group of first electric signal treated reality output electric signal/target exports electric signal.For example, in voltage
In channel, the first electric signal is 5V, and treated that reality output electric signal is for the corresponding converted mould group of the first electric signal
0.8V, it is 1V that target, which exports electric signal, and error checking parameter is 0.8/1=80% at this time.Similarly, in current channel, first
Electric signal is 5A, and treated that reality output electric signal is 0.8A, target output for the corresponding converted mould group of the first electric signal
Electric signal is 0.8A, and error checking parameter is 0.8/0.8=100% at this time.
Criteria check parameter refers to factory initial parameter.According to the comparison knot of error checking parameter and criteria check parameter
Fruit obtains error amount, and therefore, the error amount in the present embodiment is the error amount of corresponding factory initial parameter.In embodiment,
Error amount is equal to the difference of error checking parameter and criteria check parameter.Optionally, the acquisition of error amount can pass through subtracter
Realize, can also realize that the logic circuit of subtractions or comparing function is realized by other, can also by computer program come
It realizes.
According to the citing of above-described embodiment, the error checking parameter of voltage channel is 80%, the criteria check of voltage channel
Parameter is 100%, and the error amount of voltage channel is 80%-100%=-20% at this time, and the error checking parameter of current channel is
100%, the criteria check parameter of current channel is 100%, and the error amount of current channel is 100%-100%=0 at this time, this
When, according to the testing result of the error amount it is found that the voltage channel of intelligent electric energy meter there are measurement error misalignment, error amounts
It is -20%, and measurement error misalignment is not present in current channel.
Intelligent electric energy meter provided in this embodiment inputs the first electric signal to modulus of conversion group by signal feedback module, adopts
Second electric signal and target output electric signal are carried out processing and generate error checking ginseng by the second electric signal for collecting the output of modulus of conversion group
The comparison result of error checking parameter and criteria check parameter is detected measurement error misalignment failure by number, to realize in intelligent electricity
While energy table carries out alternating current electrical energy measurement, real-time monitoring and self diagnosis are carried out to measurement error, and do not influence existing intelligence
The function and contour structures of energy electric energy meter save testing cost, easy for installation simple.
As shown in Fig. 2, modulus of conversion group 120 includes voltage conversion unit 121, signal feedback in one of the embodiments,
Mould group 110 includes voltage feedback unit 111, and signal sampling mould group 130 includes voltage sampling unit 131.
Voltage feedback unit 111 connects the input terminal of voltage conversion unit 121, and voltage feedback unit 111 is converted to voltage
Unit 121 inputs the first voltage signal of the first setpoint frequency；The input terminal of voltage sampling unit 131 connects voltage conversion unit
121 output end, voltage believe the second voltage signal of 131 collection voltages converting unit 121 of sampling unit output, and electric by second
Pressure signal is exported to measure monitor mould group 140.
Voltage conversion unit 121 is used to carry out voltage division processing to the voltage signal of input, strong voltage signal is converted to weak
Voltage signal, in order to the sampling of voltage sampling unit 131.In embodiment, strong voltage signal includes mains voltage signal, first
The mixed signal of voltage signal or mains voltage signal and first voltage signal.Voltage feedback unit 111 is used in intelligent electric energy
Signal, i.e. first voltage signal are tested to 121 injecting voltage of voltage conversion unit on the voltage channel of table.Second voltage signal packet
Include the corresponding actual output voltage signal of first voltage signal and/or mains voltage signal.Specifically, in one embodiment,
Utility grid and voltage feedback unit are simultaneously to voltage conversion unit input voltage signal, at this point, voltage conversion unit 121 exports
Second voltage signal be mains voltage signal and the corresponding actual output voltage signal of first voltage signal mixed-voltage
Signal.In one embodiment, only voltage feedback unit 111 is to 121 input voltage signal of voltage conversion unit, and voltage turns at this time
The second voltage signal for changing output is the corresponding actual output voltage signal of first voltage signal.
It should be noted that the first setpoint frequency is any setpoint frequency different from mains frequency, in second voltage
When signal is the mixed signal of mains voltage signal and the corresponding actual output voltage signal of first voltage signal, convenient for from mixed
It closes in voltage signal and isolates actual output voltage signal corresponding with first voltage signal.
Modulus of conversion group 120 includes current conversion unit 122 in one of the embodiments, and signal feedback module 110 includes
Current feedback unit 112, signal sampling mould group 130 include current sampling unit 132；
Current feedback unit 112 connects the input terminal of current conversion unit 122, and current feedback unit 112 is converted to electric current
Unit 122 inputs the first current signal of the second setpoint frequency；The input terminal of current sampling unit 132 connects current conversion unit
122 output end, current sampling unit 132 acquire the second current signal that current conversion unit 122 exports, and by the second electric current
Signal is exported to measure monitor mould group 140.
Current conversion unit 122 is converted to heavy current signal weak for carrying out shunting processing to the current signal of input
Current signal, in order to the sampling of current sampling unit 132.In embodiment, heavy current signal includes mains current signal, first
The mixed signal of current signal or mains current signal and the first current signal.Current feedback unit 112 is used in intelligent electric energy
Signal, i.e. the first current signal are tested to current conversion unit Injection Current on the current channel of table.Second current signal includes
Actual output current signal corresponding with the first current signal and/or mains current signal.Specifically, in one embodiment,
Utility grid and current feedback unit are simultaneously to 122 input current signal of current conversion unit, at this point, current conversion unit 122
Second current signal of output is the mixed of mains current signal and actual output current signal corresponding with the first current signal
Close current signal.In one embodiment, only current feedback unit 112 is to 122 input current signal of current conversion unit, at this time
Electric current converts the second current signal of output as the corresponding actual output current signal of the first current signal.
It should be noted that the second setpoint frequency is any setpoint frequency different from mains frequency, in the second electric current
When signal is the mixed signal of mains current signal and the corresponding actual output current signal of the first current signal, convenient for from mixed
It closes in current signal and isolates actual output current signal corresponding with the first current signal.
It should also be noted that, the first setpoint frequency and the second setpoint frequency can be identical frequency, or no
Same frequency.For example, mains frequency is 50Hz, the first setpoint frequency is 25Hz, then the second setpoint frequency can be 25Hz,
It can be 15Hz etc..
As shown in figure 3, measure monitor mould group 140 includes detecting signal unit 141 and error in one of the embodiments,
Monitoring unit 142.Detecting signal unit 141 is separately connected signal feedback module 110 and signal sampling mould group 130, for obtaining
First electric signal and the second electric signal obtain target output electric signal according to the first electric signal, target are exported electric signal and the
Two electric signals are exported to error monitoring unit 142；142 connection signal detection unit 141 of error monitoring unit, for electric by second
Signal is compared with target output electric signal, generates error checking parameter, and error checking parameter is transmitted to processor
150。
The present embodiment by drawing two signal paths, a signal path connection letter in detecting signal unit 141 respectively
Number feedback module 110 obtains the first electric signal, another signal path connection signal samples mould group 130, obtains the second telecommunications
Number.It is regular according to set proportion after detecting signal unit 141 gets the first electric signal, according to the size of the first electric signal
The corresponding theoretical output valve of the first electric signal under normal circumstances is calculated, normal condition refers to that there is no measurement error misalignments
The case where, it can be a relative concept, can be continuous data when dispatching from the factory relative to intelligent electric energy meter to determine.Such as it sets
Fixed ratio rules are the first electric signal of input: the corresponding theory output valve=5:1 of the first electric signal under normal circumstances, according to
The ratio rules obtain the target output telecommunications that both certainty ratios are exported in the first electric signal of any input by existing circuit
Number.
Wherein, the second electric signal can be reality output electric signal corresponding with the first electric signal, at this point, the second telecommunications
Number be equal to reality output electric signal corresponding with the first electric signal.First electric signal can also be reality corresponding with alternating current
The mixing electric signal of electric signal and the corresponding reality output electric signal of the first electric signal is exported, in this case, error prison
Unit 142 is surveyed when compared with carrying out the second electric signal and target output electric signal, it is also necessary to the is isolated in electric signal from mixing
The corresponding reality output electric signal of one electric signal is compared with target output signal again.Optionally, error parameter can be
The ratio or target of the corresponding reality output electric signal of first electric signal and target output electric signal export electric signal and first
The ratio of the corresponding reality output electric signal of electric signal.
Voltage conversion unit includes resistor network in one of the embodiments,.
In embodiment, resistor network includes the multiple resistors integrated according to the connection type of setting.Pass through electricity
It hinders network and strong voltage signal is converted into weak voltage signal, convenient for the voltage sample of voltage sampling unit.
Current conversion unit includes copper-manganese resistance or current transformer in one of the embodiments,.
Intelligent electric energy meter includes single-phase intelligent electric energy meter and three-phase intelligent electric-energy meter.In single-phase intelligent electric energy meter, electric current
Converting unit includes copper-manganese resistance, and heavy current signal is converted to weak current signal by copper-manganese resistance, is convenient for current sample list
The current sample of member.In three-phase intelligent electric-energy meter, current conversion unit includes current transformer, will be strong by current transformer
Current signal is converted to weak current signal, convenient for the current sample of current sampling unit.
As shown in figure 4, intelligent electric energy meter in one of the embodiments, further include: communications module 160；Communications module 160
Processor 150 is connected, for receiving the measurement error misalignment fault message of the transmission of processor 150, and transmits and counts to terminal device
Measure error misalignment fault message.
In embodiment, processor 150 connects terminal device by communications module 160.Communications module 160 includes communication chip
And peripheral circuit.Communications module 160 is used for the communicating data information of processor 150 and exterior terminal equipment, can be by wired
Or wireless mode is connected with terminal device, realizes interaction of the data-signal between processor and terminal device.Such as, processor
150 send measurement error misalignment fault message to communications module 160, and communications module 160 receives measurement error misalignment fault message
And it is sent to terminal device, such as server main website, alarm for carrying out data analysis on terminal device using or to terminal device,
To remind user's intelligent electric energy meter that measurement error misalignment failure occurs.
Communications module 160 includes that infrared communication unit, RS485 communication unit and carrier wave are logical in one of the embodiments,
Believe the one or more of unit.
Communications module 160 includes wired communications module and radio communication mold group.Radio communication mold group includes infrared communication list
Member etc., wire communication mould group include RS485 communication unit and carrier communication unit etc..Infrared communication unit utilizes infrared transmission
Data information.Carrier communication unit utilizes existing power line, and data information is carried out high-speed transfer by carrier system.RS485
Communication unit carries out the transmission of data information using RS485 bus.In embodiment, communications module it is specifically used which kind of or which
The transmission that communication mode carries out data information is set according to the actual situation.
With continued reference to Fig. 4, intelligent electric energy meter further includes relay protection mould group 170 in one of the embodiments,；Relay
Device protects mould group 170 to connect processor 150；Processor 150 is also used to control relay protection mould group 170 and executes power-off protection.
Relay protection mould group 170 includes relay and peripheral circuit.In embodiment, relay protection mould group 170 is wrapped
Include operate a switch relay circuit and closing relay circuit.Relay protection mould group 170 is according to the processing result of processor, in circuit
When being abnormal, implement power-off protection.Such as, judge that electric current, voltage, power or temperature in circuit etc. is joined when processor 150
When number overrate, control relay protection mould group 170 executes power-off protection, disconnecting circuit, to play a protective role.
With continued reference to Fig. 4, intelligent electric energy meter further includes display module 180 in one of the embodiments,；Display module
180 connection processors 150, the signal for being exported according to processor 150 carry out information and show.
Display module 180 includes the device for display, such as display screen, charactron and indicator light.In some embodiments
In, processor 150 is to 180 output signal of display module, such as the testing result of measurement error misalignment failure, further, leads to
It crosses display screen or charactron directly displays error amount, measurement error misalignment failure etc. occurs for indicator light warning.In some other reality
It applies in example, can also show the information such as user power consumption, the state of electric network state, intelligent electric energy meter by display module 180.?
In other embodiments, display module 180 can also include function button, and in order to consult relevant information, function button includes upper
Turn over key, under turn over key etc..
Intelligent electric energy meter provided in this embodiment can also include memory (not shown), memory and 150 phase of processor
Even, for storing the voltage channel of intelligent electric energy meter and the error related data of current channel, electricity data, supplemental characteristic etc..
Optionally, memory can be read-only memory (Read-Only Memory, ROM), be also possible to random access memory
(Random Access Memory,RAM)。
Intelligent electric energy meter provided in this embodiment can also include power supply mould group (not shown), power supply mould group and processor
150 are connected, for providing stable working power by processor 150 for each mould group of intelligent electric energy meter.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of intelligent electric energy meter characterized by comprising signal feedback module, modulus of conversion group, signal sampling mould group, metering
Monitor mould group and processor；
The input terminal of signal feedback module connection modulus of conversion group, the signal feedback module is to modulus of conversion group input the
One electric signal；
The input terminal of the signal sampling mould group connects the output end of the modulus of conversion group, described in the signal sampling mould group acquisition
Second electric signal of modulus of conversion group output, and by second electric signal transmission to the measure monitor mould group；
The measure monitor mould group connects the output end of the signal feedback module and the output end of the signal sampling mould group, uses
In obtaining first electric signal and second electric signal, target output electric signal is obtained according to first electric signal, and
Processing is compared to second electric signal and target output electric signal, generation error checking parameter, and by the error school
It tests parameter and is transmitted to the processor, the target output electric signal is first electric signal after modulus of conversion group processing
Corresponding theoretical output electric signal；
The processor connects the measure monitor mould group, for the ratio according to the error checking parameter and criteria check parameter
Compared with as a result, detection measurement error misalignment failure.
2. intelligent electric energy meter according to claim 1, which is characterized in that the modulus of conversion group includes voltage conversion unit,
The signal feedback module includes voltage feedback unit, and the signal sampling mould group includes voltage sampling unit；
The voltage feedback unit connects the input terminal of the voltage conversion unit, and the voltage feedback unit turns to the voltage
Change the first voltage signal that unit inputs the first setpoint frequency；
The input terminal of the voltage sampling unit connects the output end of the voltage conversion unit, the voltage sampling unit acquisition
The second voltage signal of the voltage conversion unit output, and the second voltage signal is exported to the measure monitor mould
Group.
3. intelligent electric energy meter according to claim 1 or 2, which is characterized in that the modulus of conversion group includes that electric current conversion is single
Member, the signal feedback module includes current feedback unit, and the signal sampling mould group includes current sampling unit；
The current feedback unit connects the input terminal of the current conversion unit, and the current feedback unit turns to the electric current
Change the first current signal that unit inputs the second setpoint frequency；
The input terminal of the current sampling unit connects the output end of the current conversion unit, the current sampling unit acquisition
Second current signal of the current conversion unit output, and second current signal is exported to the measure monitor mould
Group.
4. intelligent electric energy meter according to claim 1, which is characterized in that the measure monitor mould group includes signal detection list
Member and error monitoring unit；
The detecting signal unit is separately connected the output end of the signal feedback module and the output of the signal sampling mould group
End obtains target output telecommunications according to first electric signal for obtaining first electric signal and second electric signal
Number, the target is exported into electric signal and second electric signal is exported to the error monitoring unit；
The error monitoring unit connects the detecting signal unit, for second electric signal and target to be exported electric signal
It is compared, generates error checking parameter, and the error checking parameter is transmitted to the processor.
5. intelligent electric energy meter according to claim 2, which is characterized in that the voltage conversion unit includes resistor network.
6. intelligent electric energy meter according to claim 3, which is characterized in that the current conversion unit include copper-manganese resistance or
Current transformer.
7. according to the described in any item intelligent electric energy meters of claim 4-6, which is characterized in that further include: communications module；
The communications module connects the processor, the measurement error misalignment fault message sent for receiving the processor,
And the measurement error misalignment fault message is transmitted to terminal device.
8. intelligent electric energy meter according to claim 7, which is characterized in that the communications module include infrared communication unit,
RS485 communication unit and carrier communication unit it is one or more.
9. according to the described in any item intelligent electric energy meters of claim 4-6, which is characterized in that further include relay protection mould group；
The relay protection mould group connects the processor；
The processor is also used to control the relay protection mould group and executes power-off protection.
10. according to the described in any item intelligent electric energy meters of claim 4-6, which is characterized in that further include display module；
The display module connects the processor, and the signal for being exported according to the processor carries out information and shows.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082701A (en) * | 2019-05-13 | 2019-08-02 | 国网天津市电力公司电力科学研究院 | A kind of electric energy meter measurement error on-line monitoring circuit and method based on copper-manganese sampling |
| CN110082700A (en) * | 2019-05-13 | 2019-08-02 | 国网天津市电力公司电力科学研究院 | A kind of electric energy meter measurement error on-line monitoring circuit and method based on CT sampling |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082701A (en) * | 2019-05-13 | 2019-08-02 | 国网天津市电力公司电力科学研究院 | A kind of electric energy meter measurement error on-line monitoring circuit and method based on copper-manganese sampling |
| CN110082700A (en) * | 2019-05-13 | 2019-08-02 | 国网天津市电力公司电力科学研究院 | A kind of electric energy meter measurement error on-line monitoring circuit and method based on CT sampling |
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Effective date of registration: 20200921 Address after: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Applicant after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. Address before: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Applicant before: GUANGZHOU POWER SUPPLY Co.,Ltd. |