CN106501755A - A kind of intelligent electric energy meter dynamic error measuring method based on dynamic load model - Google Patents
A kind of intelligent electric energy meter dynamic error measuring method based on dynamic load model Download PDFInfo
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- CN106501755A CN106501755A CN201610909207.XA CN201610909207A CN106501755A CN 106501755 A CN106501755 A CN 106501755A CN 201610909207 A CN201610909207 A CN 201610909207A CN 106501755 A CN106501755 A CN 106501755A
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Abstract
The invention discloses a kind of intelligent electric energy meter dynamic error measuring method based on dynamic load model, it is characterised in that set up the mathematical model of dynamic load voltage, current signal；Set up the mathematical model of dynamic load electric energy sequence；Set up electric energy train excitation and dynamic load pattern；Propose the Measurement Algorithm of electric energy meter dynamic error；Set up the test system of electric energy meter dynamic error；6 steps of test result analysis, the dynamic load waveform produced with the inventive method is easy to control, and assumes cyclophysises, can realize tracing to the source for dynamic electric energy value, can Validity Test electric energy meter dynamic error, the fully excursion of reflection dynamic load and power mode.The dynamic load test and excitation of mechanical periodicity can achieve the dynamic error that retest contrasts electric energy meter, and uncertainty is less than 0.4%.
Description
Technical field：
The present invention relates to a kind of intelligent electric energy meter dynamic error measuring method based on dynamic load model, can be applicable to intelligent electricity
Energy table belongs to electric-power metering technical field for the measurement of dynamic load in electrical network.
Background technology：
With the fast development of China's intelligent grid, the dynamic error characteristic test of electric energy meter has become newly asking for urgent need to resolve
Topic.On the one hand, solar energy, wind energy, tide energy, the introducing of the biomass energy distributed energy, make to generate in electrical network to present and move
The electric energy of state property energy；On the other hand, the popularization of Power Electronic Technique causes dynamic power load in electrical network more and more, such as electrically
Change railway, ac arc furnace, Medium Frequency Induction Heating Furnace, AC inverter device, building tower crane and welding equipment etc..These loads
Transient current tempestuously wide fluctuations during work, cause the electric energy metrical value of user to be significantly less than power system transformer substation outlet
Electric energy metrical value, cause the error of electric energy metrical, it is impossible to realize fair and rational charging, have a strong impact on supplier of electricity economy profit
Benefit.
At present, both at home and abroad for the research of electric energy meter dynamic error characteristic is in the starting stage, domestic and international experts and scholars build
Multiple dynamic load models are found, these dynamic load models can improve simulation nicety, but, they are not particularly suited for electricity
Can table dynamic error test experiments.Research be in addition, there will be for the dynamic load electric power signal mathematical model of test and excitation and moved
The research of state load power model is not perfect enough, for the test of electric energy meter dynamic error lacks dynamic electric energy value tracing method.
Content of the invention：
It is an object of the invention to overcoming the shortcomings of above-mentioned prior art and providing one kind fully reflect that dynamic load changes
The intelligent electric energy meter dynamic error method of testing of scope and changing pattern.The dynamic load waveform produced with the method is easy to control
System, assumes cyclophysises, can realize tracing to the source for dynamic electric energy value, can Validity Test electric energy meter dynamic error, fully anti-
Reflect excursion and the power mode of dynamic load.The dynamic load test and excitation of mechanical periodicity can achieve retest contrast electricity
The dynamic error of energy table, uncertainty are less than 0.4%.
The purpose of the present invention can be reached by following measure：A kind of intelligent electric energy meter based on dynamic load model is moved
State error measurement method, it is characterised in that its step is as follows：
Step one, the mathematical model for setting up dynamic load voltage, current signal：
Under dynamic loading conditions, the instantaneous ac voltage and current signal of electric energy meter test and excitation is expressed as：
（1）
（2）
Wherein,Virtual value for ac voltage signal；Virtual value for ac current signal；；For
Test and excitation electric current existsThe instantaneous phase at moment；
For reflecting load variations and being easy to control to produce test and excitation signal, formula is made（1）And formula（2）InFor determining function, and theIn individual cycle TFor constant；So
Afterwards, truncate is carried out in each number of cycles to time domain instantaneous voltage, current signal, is broken down into each cycleOn instantaneous voltageAnd transient current：
Wherein,For window function；Steady-state sine current signal；Then wink of test and excitation
When voltage and current signal can use the sequence of function respectively
Represent；Order；Then：
Then dynamic load test and excitation current signal is represented by：
Formula（8）Show, by binary sequenceTo steady state current signalsBinary system on-off keying is carried out, can be obtained
A kind of new break-make key dynamic load current signal model is arrived, the current signal can reflect multiple dynamic load patterns, can
The dynamic error of Validity Test ammeter；
Step 2：Set up the mathematical model of dynamic load electric energy sequence；
The input of electric energy meter measurement is instantaneous voltage and transient current, the electric energy metrical value of output and 2 sum of products time phases being input into
Close；The present invention will be input into the sequence of function of electric energy meter
Multiplication Integral Transformation is electric energy sequenceAs the test input stimulus of electric energy meter, tool
Body method is as follows：
Under on-off keying mode, the dynamic load instantaneous power that is input into any 1 cycle T of electric energy meterFor：
By formula（3）, formula（4）Substitution formula（9）Middle readjusting and simplifying is obtained：
Then under break-make key test and excitation mode, the electric energy that electric energy meter is measured in any 1 cycle T is：
When、、Respectively test input certain particular value when, take、；If, then in any 1 cycle T dynamic load excitation electric energy be：
Wherein,It is defined as the test electric energy equivalent of a certain input；Now, electric energy
The dynamic load excitation electric energy of table can be shown as with the discrete electric energy sequence table of input：
；
Step 3, set up electric energy train excitation and dynamic load pattern；
In order to the dynamic error characteristic than more fully testing electric energy meter, swashed to exporting dynamic response according to linear system
Encourage method, the test list entries of this paperEmploy discrete rectangle electric energy sequence to swash
Encourage mode；
Discrete rectangle electric energy train excitation can regard the superposition of unit sampling train excitation as,Meet：
Wherein,Respectively activation sequence is logical, segment length,
It is positive integer,For the activation sequence cycle；
Logical according to activation sequenceLengthDisconnected with activation sequenceLengthSpan, can be given transient state, in short-term, long when 3 kinds of different dynamic load power moulds
Formula；WhenWhen, can be by dynamic load current signal conducting week in 1 break-make key cycle
Phase numberDefine dynamic load power mode：
If a., then it is defined as transient state dynamic load power mode；
If b., then it is defined as dynamic load power mode in short-term；
If c., then dynamic load power mode when being defined as long；
Step 4, the Measurement Algorithm of electric energy meter dynamic error；
If dynamic load electric energy sequence isSequence total length, and；For standard scale, take,
Then total electric energy of standard scale measurement is:
It is input to the dynamic load electric energy theoretical value of tested electric energy meter：
（15）
Then the dynamic load electric energy theoretical value of tested electric energy meter measurement can be expressed as by standard scale electric energy measurement value：
If the energy value of the actual measurement of tested electric energy meter is, tested electric energy meter dynamic error can be calculated by following formula：
For each dynamic error test of electric energy meter, the break-make key number of cycles for actually observing is not necessarily integer, therefore
Dynamic error is calculated according to above formulaWhen, maximum can produce the error in 1 break-make key cycle；If break-make key measure the cycle number is
, then the theoretical additive error that the algorithm is produced is less than；
Step 5, the test system for setting up electric energy meter dynamic error：
Electric energy meter dynamic error test system is by standard electric energy meter, computer, programmable power supply, dynamic load controlling electric energy and to move
State error testing device and 2 tested power meter groups are into computer connects programmable power supply, dynamic load controlling electric energy respectively and moves
State error testing device, programmable power supply connection standard electric energy meter, standard electric energy meter dynamic load controlling electric energy are surveyed with dynamic error
Trial assembly is put, and dynamic load controlling electric energy is connected 2 tested electric energy meters with dynamic error test device；
In error testing, three-phase alternating voltage and electric current that programmable power supply produces stable state is controlled first by computer, will be steady
During the three-phase alternating current of state is input into dynamic load controlling electric energy and dynamic error test device；Then, dynamic load electric energy
Control produces three phase dynamic electric current with dynamic error test device and is separately input into 2 tested electric energy meters, makes tested electric energy meter pair
Dynamic load electric energy is measured；Finally by dynamic load controlling electric energy and dynamic error test device in the tested electric energy for setting
During table output pulse, the output pulse of standard electric energy meter is gathered, calculated according to the electric energy meter dynamic error measurement that step 4 is proposed
Method, completes the calculating and display of tested electric energy meter dynamic error；
Step 6, test result analysis：
Using above-mentioned electric energy meter dynamic error test system, dynamic is carried out to the three-phase and four-line electric energy meter of domestic and international 3 producers
Error testing, each dynamic error test have chosen the break-make key measure the cycle of more than 300；3 kinds of electric energy meters transient state,
In short-term, when long, totally 6 kinds of make and break periods are more as shown in table 1 than the dynamic error under state for 3 kinds of dynamic load power modes；In table 1, move
State error is 5 measurement maximum error values；Producer A electric energy meters are 1.0 grades of intelligent electric energy meters, and producer B electric energy meters are 1.0 grades of electricity
Minor carrier electric energy meter, producer C electric energy meters are 0.5s levels foreign countries gate energy meter；
From table 1：The dynamic error of producer's A intelligent electric energy meters is substantially better than other electronic electric energy meters；Negative in transient state dynamic
Lotus 1：Under 40 patterns, producer C electric energy meters dynamic error is minimum；Producer's B electric energy meters do not have pulse to export, and occur in that and can not measure temporarily
The situation of state dynamic load electric energy；When long under dynamic load power mode, producer A and C electric energy meter dynamic error is significantly less than
Its grade of errors；Above-mentioned test result shows the dynamic error of electric energy meter and the power mode breath manner of breathing of test and excitation dynamic load
Close, the dynamic error property difference of different electric energy meters is larger.
The present invention can produce following good effect compared with the prior art：First, a kind of break-make key dynamic load is established
The mathematical model of current signal, establishes a kind of mathematical model of dynamic load electric energy sequence on this basis, and defines 3 kinds
Dynamic load power mode；Secondly, it is proposed that a kind of from dynamic energy value to the source tracing method of static energy value, it is derived from one
Plant the algorithm of electric energy meter dynamic error measurement；Finally, electric energy meter dynamic error measuring system is established, right respectively using the system
The electric energy meter of different manufacturers carries out dynamic error test both at home and abroad, as a result shows the dynamic error and test and excitation dynamic of electric energy meter
The power mode of load is closely related, and the dynamic error property difference of different electric energy meters is larger, the dynamic of some tested electric energy meters
Error has been even more than 20 times of its class of accuracy, uncomfortable total amount dynamic load electric energy.
Which has following features：
1., compared with existing electric load dynamic performance model, the electric load dynamic performance model that the present invention sets up has energy
Enough fully reflect the excursion and changing pattern of dynamic load, be easy to control generation, presentation cyclophysises, dynamic can be realized
The characteristics of electric energy magnitude tracing.
2. binary system on-off keying system is carried out to steady state current signals using binary sequence, obtained a kind of new moving
State load current signal model.The current signal can produce multiple dynamic load patterns, can Validity Test electric energy meter dynamic
Error.
3. dynamic load controlling electric energy and dynamic error have developed using the electric energy series model and energisation mode set up
Test device, produced dynamic load electric power signal can fully reflect the excursion of dynamic load in cyclically-varying
And power mode, the dynamic load test and excitation of mechanical periodicity can achieve the dynamic error that retest contrasts electric energy meter.
4. when break-make key measure the cycle is more than 300, it is contemplated that the error of standard scale is less than, institute of the present invention
The uncertainty of the dynamic error method of testing of proposition is less than 0.4%.
Description of the drawings：
Fig. 1 is the structural representation of the electric energy meter dynamic error test system of the present invention.
Specific embodiment：
Table elaborates to embodiments of the present invention below in conjunction with the accompanying drawings：
Embodiment：A kind of intelligent electric energy meter dynamic error measuring method based on dynamic load model, it include following 6 steps
Suddenly：
Step one, the mathematical model for setting up dynamic load voltage, current signal.
Under dynamic loading conditions, the instantaneous ac voltage and current signal of electric energy meter test and excitation is expressed as：
（1）
（2）
Wherein,Virtual value for ac voltage signal；Virtual value for ac current signal；；
Exist for test and excitation electric currentThe instantaneous phase at moment.
For reflecting load variations and being easy to control to produce test and excitation signal, formula is made（1）And formula（2）InFor determining function, and theIn individual cycle TFor constant.Then,
Truncate is carried out in each number of cycles to time domain instantaneous voltage, current signal, each cycle is broken down intoOn instantaneous voltageAnd transient current：
Wherein,For window function；Steady-state sine current signal.Then wink of test and excitation
When voltage and current signal can use the sequence of function respectively
Represent.Order.Then：
Then dynamic load test and excitation current signal is represented by：
Formula（8）Show, by binary sequenceTo steady state current signalsBinary system on-off keying is carried out, can be obtained
A kind of new break-make key dynamic load current signal model is arrived, the current signal can reflect multiple dynamic load patterns, can
The dynamic error of Validity Test ammeter.
Step 2：Set up the mathematical model of dynamic load electric energy sequence.
When the input of electric energy meter measurement is the sum of products of instantaneous voltage and transient current, the electric energy metrical value of output and 2 inputs
Between related.The present invention will be input into the sequence of function of electric energy meter
Multiplication Integral Transformation is electric energy sequenceAs the test input stimulus of electric energy meter, concrete side
Method is as follows：
Under on-off keying mode, the dynamic load instantaneous power that is input into any 1 cycle T of electric energy meterFor：
By formula（3）, formula（4）Substitution formula（9）Middle readjusting and simplifying is obtained：
Then under break-make key test and excitation mode, the electric energy that electric energy meter is measured in any 1 cycle T is：
When、、Respectively test input certain particular value when, take、.If, then in any 1 cycle T dynamic load excitation electric energy be：
Wherein,It is defined as the test electric energy equivalent of a certain input.Now, electric energy
The dynamic load excitation electric energy of table can be shown as with the discrete electric energy sequence table of input：
.
Step 3, set up electric energy train excitation and dynamic load pattern.
In order to the dynamic error characteristic than more fully testing electric energy meter, according to linear system to exporting dynamic response
Motivational techniques, the test list entries of this paperEmploy discrete rectangle electric energy sequence
Energisation mode.
Discrete rectangle electric energy train excitation can regard the superposition of unit sampling train excitation as,Meet：
Wherein,Respectively activation sequence is logical, segment length,
It is positive integer,For the activation sequence cycle.
Logical according to activation sequenceLengthDisconnected with activation sequenceLengthSpan, can be given transient state, in short-term, long when 3 kinds of different dynamic load power moulds
Formula.WhenWhen, can be by dynamic load current signal conducting week in 1 break-make key cycle
Phase numberDefine dynamic load power mode：
If a., then it is defined as transient state dynamic load power mode；
If b., then it is defined as dynamic load power mode in short-term；
If c., then dynamic load power mode when being defined as long.
Step 4, the Measurement Algorithm of electric energy meter dynamic error.
If dynamic load electric energy sequence isSequence total length, and.For standard scale, take,
Then total electric energy of standard scale measurement is:
It is input to the dynamic load electric energy theoretical value of tested electric energy meter：
（15）
Then the dynamic load electric energy theoretical value of tested electric energy meter measurement can be expressed as by standard scale electric energy measurement value：
If the energy value of the actual measurement of tested electric energy meter is, tested electric energy meter dynamic error can be calculated by following formula：
For each dynamic error test of electric energy meter, the break-make key number of cycles for actually observing is not necessarily integer, therefore
Dynamic error is calculated according to above formulaWhen, maximum can produce the error in 1 break-make key cycle.If break-make key measure the cycle number is
, then the theoretical additive error that the algorithm is produced is less than.
Step 5, the test system for setting up electric energy meter dynamic error.
Referring to Fig. 1, electric energy meter dynamic error test system is by standard electric energy meter, computer, programmable power supply, dynamic load
Controlling electric energy is with dynamic error test device and 2 tested power meter groups into computer connects programmable power supply, dynamic load respectively
Controlling electric energy and dynamic error test device, programmable power supply connection standard electric energy meter, standard electric energy meter dynamic load controlling electric energy
With dynamic error test device, dynamic load controlling electric energy is connected 2 tested electric energy meters with dynamic error test device.
In error testing, three-phase alternating voltage and electric current that programmable power supply produces stable state is controlled first by computer,
During the three-phase alternating current of stable state is input into dynamic load controlling electric energy and dynamic error test device.Then, dynamic load
Controlling electric energy produces three phase dynamic electric current with dynamic error test device and is separately input into 2 tested electric energy meters, makes tested electric energy
Table is measured to dynamic load electric energy；Last tested set with dynamic error test device by dynamic load controlling electric energy
During electric energy meter output pulse, the output pulse of standard electric energy meter is gathered, surveyed according to the electric energy meter dynamic error that step 4 is proposed
Quantity algorithm, completes the calculating and display of tested electric energy meter dynamic error.
Step 6, test result analysis.
The present invention is using the electric energy meter dynamic error test system shown in accompanying drawing 1, the three-phase and four-line to domestic and international 3 producers
Electric energy meter has carried out dynamic error test, and each dynamic error test have chosen the break-make key measure the cycle of more than 300.
3 kinds of electric energy meters in transient state, in short-term, long when 3 kinds of dynamic load power modes totally 6 kinds of make and break periods are than the dynamic error under state such as
Shown in table 1.In table 1, dynamic error is 5 measurement maximum error values；Producer A electric energy meters be 1.0 grades of intelligent electric energy meters, producer
B electric energy meters are 1.0 grades of electronic type carrier electric energy meters, and producer C electric energy meters are 0.5s levels foreign countries gate energy meter.
From table 1：The dynamic error of producer's A intelligent electric energy meters（Remove 1：Outside 40 patterns）It is substantially better than other electronic type electricity
Can table；In transient state dynamic load 1：Under 40 patterns, producer C electric energy meters dynamic error is minimum；Producer's B electric energy meters do not have pulse defeated
Go out, occur in that the situation that can not measure transient state dynamic load electric energy；When long under dynamic load power mode, producer's A and C electric energy
Table dynamic error is significantly less than its grade of errors.Above-mentioned test result shows that the dynamic error of electric energy meter is negative with test and excitation dynamic
The power mode of lotus is closely bound up, and the dynamic error property difference of different electric energy meters is larger.
Claims (1)
1. a kind of intelligent electric energy meter dynamic error measuring method based on dynamic load model, it is characterised in that its step is as follows：
Under dynamic loading conditions, the instantaneous ac voltage and current signal of electric energy meter test and excitation is expressed as：
（1）
（2）
Wherein,Virtual value for ac voltage signal；Virtual value for ac current signal；；；
Exist for test and excitation electric currentThe instantaneous phase at moment；
For reflecting load variations and being easy to control to produce test and excitation signal, formula is made（1）And formula（2）InFor determining function, and theIn individual cycle TFor constant；
Then, truncate is carried out in each number of cycles to time domain instantaneous voltage, current signal, is broken down into each cycleOn instantaneous voltageAnd transient current：
Wherein,For window function；Steady-state sine current signal；Then test and excitation
Instantaneous voltage and current signal can use the sequence of function respectively
Represent；Order；Then：
Then dynamic load test and excitation current signal is represented by：
Formula（8）Show, by binary sequenceTo steady state current signalsBinary system on-off keying is carried out, can be obtained
A kind of new break-make key dynamic load current signal model is arrived, the current signal can reflect multiple dynamic load patterns, can
The dynamic error of Validity Test ammeter；
Step 2：Set up the mathematical model of dynamic load electric energy sequence；
The input of electric energy meter measurement is instantaneous voltage and transient current, the electric energy metrical value of output and 2 sum of products time phases being input into
Close；The present invention will be input into the sequence of function of electric energy meterPhase
Product point is converted to electric energy sequenceAs the test input stimulus of electric energy meter, concrete grammar
As follows：
Under on-off keying mode, the dynamic load instantaneous power that is input into any 1 cycle T of electric energy meterFor：
By formula（3）, formula（4）Substitution formula（9）Middle readjusting and simplifying is obtained：
Then under break-make key test and excitation mode, the electric energy that electric energy meter is measured in any 1 cycle T is：
When、、Respectively test input certain particular value when, take、；If, then in any 1 cycle T dynamic load excitation electric energy be：
Wherein,It is defined as the test electric energy equivalent of a certain input；Now, electricity
The dynamic load excitation electric energy of energy table can be shown as with the discrete electric energy sequence table of input：
；
Step 3, set up electric energy train excitation and dynamic load pattern；
In order to the dynamic error characteristic than more fully testing electric energy meter, swashed to exporting dynamic response according to linear system
Encourage method, the test list entries of this paperEmploy discrete rectangle electric energy train excitation
Mode；
Discrete rectangle electric energy train excitation can regard the superposition of unit sampling train excitation as,Meet：
Wherein,Respectively activation sequence is logical, segment length,
It is positive integer,For the activation sequence cycle；
Logical according to activation sequenceLengthDisconnected with activation sequenceLengthSpan, can be given transient state, in short-term, long when 3 kinds of different dynamic load power modes；
WhenWhen, can be by dynamic load current signal turn-on cycle in 1 break-make key cycle
NumberDefine dynamic load power mode：
If a., then it is defined as transient state dynamic load power mode；
If b., then it is defined as dynamic load power mode in short-term；
If c., then dynamic load power mode when being defined as long；
Step 4, the Measurement Algorithm of electric energy meter dynamic error；
If dynamic load electric energy sequence isSequence total length, and；For standard scale, take,
Then total electric energy of standard scale measurement is:
It is input to the dynamic load electric energy theoretical value of tested electric energy meter：
（15）
Then the dynamic load electric energy theoretical value of tested electric energy meter measurement can be expressed as by standard scale electric energy measurement value：
If the energy value of the actual measurement of tested electric energy meter is, tested electric energy meter dynamic error can be calculated by following formula：
For each dynamic error test of electric energy meter, the break-make key number of cycles for actually observing is not necessarily integer, therefore
Dynamic error is calculated according to above formulaWhen, maximum can produce the error in 1 break-make key cycle；If break-make key measure the cycle number is
, then the theoretical additive error that the algorithm is produced is less than；
Step 5, the test system for setting up electric energy meter dynamic error：
Electric energy meter dynamic error test system is by standard electric energy meter, computer, programmable power supply, dynamic load controlling electric energy and to move
State error testing device and 2 tested power meter groups are into computer connects programmable power supply, dynamic load controlling electric energy respectively and moves
State error testing device, programmable power supply connection standard electric energy meter, standard electric energy meter dynamic load controlling electric energy are surveyed with dynamic error
Trial assembly is put, and dynamic load controlling electric energy is connected 2 tested electric energy meters with dynamic error test device；
In error testing, three-phase alternating voltage and electric current that programmable power supply produces stable state is controlled first by computer, will be steady
During the three-phase alternating current of state is input into dynamic load controlling electric energy and dynamic error test device；Then, dynamic load electric energy
Control produces three phase dynamic electric current with dynamic error test device and is separately input into 2 tested electric energy meters, makes tested electric energy meter pair
Dynamic load electric energy is measured；Finally by dynamic load controlling electric energy and dynamic error test device in the tested electric energy for setting
During table output pulse, the output pulse of standard electric energy meter is gathered, calculated according to the electric energy meter dynamic error measurement that step 4 is proposed
Method, completes the calculating and display of tested electric energy meter dynamic error；
Step 6, test result analysis：
Using above-mentioned electric energy meter dynamic error test system, dynamic is carried out to the three-phase and four-line electric energy meter of domestic and international 3 producers
Error testing, each dynamic error test have chosen the break-make key measure the cycle of more than 300；3 kinds of electric energy meters transient state,
In short-term, when long, totally 6 kinds of make and break periods are more as shown in table 1 than the dynamic error under state for 3 kinds of dynamic load power modes；In table 1, move
State error is 5 measurement maximum error values；Producer A electric energy meters are 1.0 grades of intelligent electric energy meters, and producer B electric energy meters are 1.0 grades of electricity
Minor carrier electric energy meter, producer C electric energy meters are 0.5s levels foreign countries gate energy meter；
From table 1：The dynamic error of producer's A intelligent electric energy meters is substantially better than other electronic electric energy meters；Negative in transient state dynamic
Lotus 1：Under 40 patterns, producer C electric energy meters dynamic error is minimum；Producer's B electric energy meters do not have pulse to export, and occur in that and can not measure temporarily
The situation of state dynamic load electric energy；When long under dynamic load power mode, producer A and C electric energy meter dynamic error is significantly less than
Its grade of errors；Above-mentioned test result shows the dynamic error of electric energy meter and the power mode breath manner of breathing of test and excitation dynamic load
Close, the dynamic error property difference of different electric energy meters is larger.
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| CN109061548A (en) * | 2018-10-12 | 2018-12-21 | 山东计保电气有限公司 | High-voltage electric-energy meter entirety on-line testing method |
| CN109325295A (en) * | 2018-09-26 | 2019-02-12 | 云南电网有限责任公司电力科学研究院 | A kind of dynamic charge modeling method based on small time scale empirical mode decomposition |
| CN110531299A (en) * | 2018-05-23 | 2019-12-03 | 北京化工大学 | The compressed sensing indirect measurement method of electric energy meter dynamic measuring signal electric energy magnitude |
| CN111562542A (en) * | 2020-05-31 | 2020-08-21 | 宁夏隆基宁光仪表股份有限公司 | Electric energy meter fault excitation test environment construction system and method |
| CN113609648A (en) * | 2021-07-12 | 2021-11-05 | 湖南省计量检测研究院 | Electric energy error metering method and device based on dynamic load and electronic equipment |
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| CN109030973A (en) * | 2018-05-15 | 2018-12-18 | 淮阴师范学院 | Smart grid non-intrusion type resident load observation circuit and system |
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| CN109061548B (en) * | 2018-10-12 | 2021-11-09 | 山东计保电气有限公司 | Integral online checking method for high-voltage electric energy metering device |
| CN111562542A (en) * | 2020-05-31 | 2020-08-21 | 宁夏隆基宁光仪表股份有限公司 | Electric energy meter fault excitation test environment construction system and method |
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