CN107767722A - A kind of multifunctional digital electric energy metering Training Simulation System - Google Patents
A kind of multifunctional digital electric energy metering Training Simulation System Download PDFInfo
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Abstract
A kind of multifunctional digital electric energy metering Training Simulation System, is related to training on electric power field.At present, training lacks a set of effective device and system in itself.The present invention includes two sets of the digitized measurement Simulated training devices, and two sets of the digitized measurement Simulated training devices are arranged at intervals；Every suit the digitized measurement Simulated training device includes cabinet, electronic mutual inductor tentative module, combining unit metering experiment module, digital electric energy meter experiment module, digital metering Simulated training device full performance test module, display module and control module；Cabinet is provided with multiple equipment interface to connect the electronic mutual inductor tentative module for being built in cabinet, combining unit metering experiment module, digital electric energy meter experiment module, the full performance test module of digital metering Simulated training device.The system can realize double online real-time tournament, and training efficiency is high, and training is comprehensive, be advantageous to accelerate the popularization and application of digitalized electric energy metering system.
Description
Technical field
The present invention relates to training on electric power field, a kind of especially multifunctional digital electric energy metering Training Simulation System.
Background technology
Conditional electronic formula electric energy metered system is made up of electromagnetic transformer and electronic electric energy meter, secondary a large amount of using electric
Cable transmission signal, error component are numerous.Different from traditional simulation electric energy metered system, the entirety of digitalized electric energy metering system
Framework is there occurs the change of essence, and whole system is by electronic current mutual inductor（ECT）, electronic type voltage transformer（EVT）、
Combining unit, digitalized electrical energy meter are formed, electronic mutual inductor（Containing combining unit）It instead of conventional electromagnetic transformer, optical fiber
Communication instead of substantial amounts of electric wire, and electronic electric energy meter is also replaced by digitalized electrical energy meter.Digitalized electric energy metering has
Insulation system is simple, without blast, without the advantages that second open circuit is dangerous, data signal is shared is more easy, and carrying load ability is strong, and
The developing goal for building strong intelligent grid is proposed in State Grid Corporation of China in 2009, intelligent substation is as intelligent grid
One important step, obtain promoting throughout the country and built.The basic demand of intelligent substation is whole station information digitalization, led to
Believe platform network, information sharing standardization, information gathering, measurement, control, protection, metering and monitoring etc. can be automatically performed
Function.Important component of the digitized measurement system as intelligent substation, to be digitized as feature, to measure certain point electric energy
For target, it is electronic mutual inductor or conventional electromagnetic transformer according to transformer, is divided into totally digitilized metering device and half
Word metering device.Based on transformer, combining unit, digitalized electrical energy meter technology digitalized electric energy metering system in intelligent change
It is widely applied in power station.Digitalized electric energy metering system has following different characteristics with simulation electric energy metered system：1. number
There is connecting each other in mechanism in each equipment of word electric energy metering system, indivisible, it is necessary to be ground as an entirety
Study carefully, meanwhile, digitalized electrical energy meter simply completes the function of a digital calculator in itself, individually studies digitalized electrical energy meter
The degree of accuracy has no practical significance, and both should be considered as to an entirety and traced to the source, its metering performance can be assessed；2.
Data between combining unit and digitalized electrical energy meter communicate under process layer bus network transmission conditions, and equipment has network work(
The adaptability appraisal problem of energy, when network function exception occurring or transmission loop is broken down, digitalized electrical energy meter is not
The error of electric energy metrical may be caused with treatment mechanism, it is necessary to study the system self-adaptability under network exceptional condition；3. number
According to the safety issue of transmission, for digitalized electric energy metering system because data are Network Transmitting, there is security in the network information
Problem, electricity filching means may technically upgrade, although IEC has promulgated the standards of IEC 62351 to handle IEC 61850
The safety issue of communication, but clear stipulaties explanation is had no for the security of digitalized electric energy metering, it is badly in need of passing network
Defeated security carries out examination analysis, avoids the loss of Utilities Electric Co.；4. the metering engineering model of digitalized electric energy metering system and
Simulation electric energy metered system also has very big difference, shadow of the digitalized electric energy metering accuracy by equipment performance index, field working conditions
Ring larger, it is necessary to establish the engineering model of digitalized electric energy metering system, the reality of accurate evaluation digitalized electric energy metering system
Error.
The digitized measurement technology has been carried out greatly as emerging measurement technology, various regions Utilities Electric Co. and relevant device manufacturer to it
Quantifier elimination, but because the digitized measurement system detectio technology, vertification regulation, relevant criterion are not perfect, detection device, detection
Ability needs significantly to be lifted, and seriously governs the development of digitalized electric energy metering system, and State Grid Corporation of China's target will in addition
Ask and make a concentrated effort to finish digital electric energy metrical System Construction, use it for trade settlement, therefore, the construction of the digitized measurement system has been carved
Do not allow to delay.But certain fund, human and material resources are although put into digital electric energy metering to be trained stage by stage, but have trained
Instruction inherently lacks a set of effective device and system, and front man's practical operation more lacks a set of the digitized measurement emulation
Training system, help field assay and safeguard digital electric energy metrical, improve management automation, intelligent level.
The content of the invention
The technical problem to be solved in the present invention and the technical assignment proposed are prior art to be improved with being improved,
A kind of multifunctional digital electric energy metering Training Simulation System is provided, to realize the actual behaviour to the digitized measurement of staff
Make training purpose.Therefore, the present invention takes following technical scheme.
A kind of multifunctional digital electric energy metering Training Simulation System, including two sets of the digitized measurement Simulated training devices,
Two sets of the digitized measurement Simulated training devices are arranged at intervals；Every suit the digitized measurement Simulated training device includes cabinet, used
In carry out electronic mutual inductor experiment electronic mutual inductor tentative module, by combining unit metering realize combining unit based on
Measure experiment module, the digital electric energy meter experiment module realized for digital electric energy meter, filled for digital metering Simulated training
Put digital metering Simulated training device full performance test module, display module and the control module of full performance test, described control
Molding block and electronic mutual inductor tentative module, combining unit metering experiment module, digital electric energy meter experiment module, digital meter
The full performance test module of amount Simulated training device, display module are connected；It is interior to connect that cabinet is provided with multiple equipment interface
It is placed in the electronic mutual inductor tentative module of cabinet, combining unit measures experiment module, digital electric energy meter experiment module, numeral
Measure the full performance test module of Simulated training device；Described electronic mutual inductor tentative module, combining unit metering experiment mould
The full performance test module of block, digital electric energy meter experiment module, digital metering Simulated training device include standard configuration equipment and by
Measurement equipment.By two sets of simulators, and by network connection, double online real-time tournament can be achieved, improve emulation study
The competitive spirit of training；The perfect functions of modules of the system and equipment interface can easily access electronic mutual inductor, merge list
The digitizers such as member, digitalized electrical energy meter, Training and Learning, theoretical research are carried out to whole digitalized electric energy metering system, is imitated
True calculating, fault simulation, Analysis on communication performances, verification experimental verification, error checking, graduation examination, contest tourney etc. are many to grind
Study carefully and test.Staff can at any time, real-time online study, training, examination, training cost can be greatly reduced, shorten
The training and learning time of staff, accelerate the popularization and application of digitalized electric energy metering system.
As further improving and supplementing to above-mentioned technical proposal, present invention additionally comprises following additional technical feature.
Described electronic mutual inductor tentative module includes standard potential transformer, standard current transformer, electronic type electricity
Transformer, electronic current mutual inductor, combining unit, Synchronization Clock, wall is pressed to hand over machine and checking electronic type transformers
Instrument；For electronic mutual inductor tentative module using primary current, voltage as input signal, input signal enters normal voltage/electricity simultaneously
Current transformer and electronic type voltage/current transformer, the standard secondary singal access electronics of normal voltage/current transformer output
Formula mutual-inductor tester, the small analog signal access electronic transducer calibration instrument of electronic type voltage/current transformer output and
Combining unit, the signal access combining unit of electronic type voltage/current transformer output, combining unit output end are directly accessed electricity
Minor mutual-inductor tester input first passes through interval layer switch and then accesses the input of electronic transducer calibration instrument
End.This module can individually give research and experimental test training to electronic mutual inductor self character, with primary current, voltage
For input signal, electronic mutual inductor metering performance is tested（Fundamental wave, harmonic wave）, communication performance, time performance；Elementary error, absolutely
To delay-time characteristic etc.；Electronic transducer calibration instrument individually can not only divide electronic mutual inductor self character
Analysis, and electronic transducer calibration instrument+combining unit overall permanence can be analyzed.
Described electronic mutual inductor tentative module also includes three-phase program-controlled power source, increasing apparatus, up-flow device, described
The input of increasing apparatus be connected with program controled power source, the output end of increasing apparatus is connected with standard potential transformer；It is described
The input of up-flow device be connected with three-phase program-controlled power source, the output end for flowing up device is connected with standard current transformer；
Described three-phase program-controlled power source, increasing apparatus, up-flow device, standard potential transformer, standard current transformer, step clock dress
Put, to hand over machine machine and electronic transducer calibration instrument be standard configuration equipment to wall, described electronic type voltage transformer, electronic type are electric
Current transformer, combining unit are equipment under test.Three-phase program-controlled power source as after the boosted up-flow of signal source as once testing
Current signal and test voltage signal are respectively supplied to normal voltage/current transformer；Described standard configuration equipment can realize equipment
Share, described equipment under test is conveniently replaceable because test object is different with content.
Described electronic mutual inductor tentative module test event includes：
101）Basic accuracy test：For electronic current mutual inductor, basic accuracy test should be 1%（To S levels）, 5%,
20%, 100% and 120% rated current point is carried out；For measuring 0.2 grade and following current transformer, each measurement point is surveyed
Measure the ratio error and phase error when electric current rises；For electronic type voltage transformer, basic accuracy test 80%,
100%th, 120% rated voltage point is carried out；For measurement voltage is measured with 0.2 grade and following voltage transformer, each measurement point
Ratio error and phase error during rising；
102）Measurement reproducibility：This test is carried out simultaneously with elementary error measurement, calculates continuous n measurement arithmetic mean of instantaneous value
Experimental standard deviation；
103）Short-time stability：Rated current/voltage is applied with combining unit to tested metering, in same measurement point follow-on test
10min, the maximum and minimum value of tested metering combining unit error are drawn, maximum is subtracted into minimum value；
104）Stability of period：By the elementary error of last time measurement compared with this elementary error measured, count respectively
Calculate the difference of wallpaper error and the difference of phase error in result of the test twice；
105）Direct current biasing is tested：When it is zero that tested metering is with combining unit input signal, combining unit test device is used
Test the DC component of its output signal；
106）Multi-channel synchronous accuracy test：The difference of the amplitude error of electronic mutual inductor difference analog measurement passage is not
± 0.05% should be exceeded, the difference of phase error is no more than ± 2 '；Experiment is electronic type mutual inductance using three-phase alternating current simulation signal generator
Device adds specified threshold voltage, measures the amplitude error and phase error of each voltage channel and each current channel；
107）Three-phase imbalance load is tested：Three-phase imbalance refers to three-phase voltage passage and adds symmetrical three-phase reference voltage, Ren Yixiang
Current channel applies reference current, another biphase current passage no current；In the case of three-phase imbalance and phase shortage, metering is closed
And each channel measurement accuracy of voltage, electric current of unit answers coincidence loss to allow excursion requirement；For digital quantity input type
Metering combining unit no this item requirement；
108）The sampling value message response time tests：Tested transformer is in the case of without synchronisation source, by electronic mutual inductor school
The relative angular difference that equipment measures fundamental wave is tested, calculates the absolute time delay of electronic mutual inductor that primary current exports to MU；Test
Error between the specified delay of absolute time delay and the combining unit demarcation of electronic mutual inductor；
109）Integrity test：Combining unit test device judges that metering is sent out with combining unit according to the sampling value message received
The sampling value message sent whether packet loss, lose point, repetition, incorrect order, and record and send the cycle, the testing time continues 24 more than h；This
Item testing needle is carried out respectively to different sampling value message configurations；
110）Sampling value message sends periodic test：Combining unit test device record receive often bag sampling value message when
Carve, and calculate the interval time T between continuous two bag accordingly；Difference between T and nominal-sampling interval should meet that metering is used
Related request in combining unit technical conditions；Testing time continues 24 more than h；This is tested for different sampling value messages to match somebody with somebody
Put；
111）Time keeping error is examined：Time keeping error passes through the MU 1PPS/ sampling synchronization pulses signals exported and reference clock source
1PPS signals compare acquisition；When test starts, metering combining unit first receives the time service of standard clock source, merging to be batched
After unit normal work, the time service of standard clock source is cancelled；Since at the time of cancelling time service, using time tester with per second
The pps pulse per second signal that the frequency measurement metering that measurement is 1 time is each exported with combining unit and standard clock source effectively between when
Between poor absolute value △ t, continuous measurement a period of time, the △ t measured in this period maximum is final testing result,
△ t are less than or equal to 4 μ s；
112）Pair when the experiment of abnormal signal situation：The signal during output pair of sampling pulse generator originating port 1,2,3, metering are used
Combining unit is in normal operating conditions；Change the output of clock source port 1, make that port 1 exports pair when signal lose
Can not the abnormal conditions such as true signal, dither signal, wrong frame, wrong check code, test and measuring combining unit by these abnormal feelings
The interference of condition simultaneously sends message by the correct sampling period.The various surveys of electronic mutual inductor tentative module can be conveniently realized
Examination project.
Described combining unit metering experiment module includes three-phase program-controlled power source, analog input combining unit, synchronization
Clock apparatus, interval layer switch, combining unit tester, combining unit measure experiment module using three-phase program-controlled power source as letter
Number source, output signal enter analog input combining unit and combining unit tester simultaneously, and combining unit output end directly connects
Enter combining unit tester or first pass through interval layer switch and then access combining unit tester；Described three-phase program-controlled work(
Rate source, Synchronization Clock, interval layer switch, combining unit tester are standard configuration equipment, and described analog input merges
Unit is equipment under test.Combining unit metering experiment module can be to analog input combining unit error characteristics, error shadow
The amount of sound, communication performance, net synchronization capability are tested；Described standard configuration equipment can realize that equipment shares, described equipment under test because
Test object is different with content, is conveniently replaceable.
The test event of combining unit metering experiment module includes：
201）The elementary error experiment under state and under asynchronous regime is synchronized to combining unit：Under reference condition, close
And the ratio error and phase error of cell voltage passage, current channel need to meet the error of the corresponding class of accuracy of combining unit
Limit value requirement, actual error curve must not exceed the broken line scope that error limitation line is formed；In the measurement electricity of combining unit
Circulation road according to 5%, 20%, 100%, 120% rated alternating current, measurement voltage channel according to 80%, 100%, 120% it is specified
Alternating voltage, apply power frequency analog quantity；Measurement channel is tested respectively using lock-out pulse method and constant time lag method, and test result takes
Rise, decline arithmetic mean of instantaneous value, test amplitude error, the difference of phase error of same passage two methods of；
202）Difference between rising and falling is tested：In combining unit detection process, same test point presents basic in signal raising and lowering
Error change amount should be no more than 1/5 of error limit corresponding to corresponding class of accuracy；Difference between rising and falling measures to be surveyed with elementary error
Amount is carried out simultaneously, and measurement point is identical；Each elementary error measurement point is measured during signal raising and lowering, tests each measurement
Point tolerance variable quantity；
203）Measurement reproducibility is tested：Combining unit test repeatability index is not more than the limits of error corresponding to the class of accuracy
The 1/10 of value；Under reference condition, it is tested combining unit and applies rated voltage, current signal, continuously measure corresponding ratio error
And phase error, n measurement result, wherein n are read altogether>10, calculate corresponding experimental standard deviation；
204）Sample-synchronous error measure is tested：Under reference condition, it is tested combining unit and applies rated voltage, current signal,
Measure three-phase voltage interchannel, the phase difference value of three-phase current interchannel；
205）Temperature influences measurement experiment：Tested combining unit is placed in high-low temperature test chamber；Test temperature according to 23 DEG C, 33
DEG C, 23 DEG C, 13 DEG C, the lifting of 23 DEG C of order, keep 1h in each temperature spot, other reference conditions do not change, be tested merge it is single
Member applies rated voltage, current signal, measures its elementary error, respective measurement values are recorded after measurement result is stable；With reference bar
Measured value compares under part, error change amount caused by test temperature rising and decline；
206）Frequency influence measurement experiment：Under reference condition, it is tested combining unit and applies rated voltage, current signal, respectively
Change voltage, current signal frequency, setting measurement point 45Hz, 48Hz, 49Hz, 50Hz, 51Hz, 52Hz, 55Hz, it is basic to measure its
Error, respective measurement values are recorded after measurement result is stable；Compared with measured value under reference condition, caused by test frequency change
Error change amount；
207）Harmonic effects measurement experiment；
208）Pair when error determine；
209）Time keeping error determines；
210）Step-out resynchronizes timing；
211）Sampled value issue centrifugal pump is examined.Each test item of combining unit metering experiment module can be conveniently realized
Mesh.
Digital electric energy meter experiment module includes three-phase program-controlled power source, analog input combining unit, synchronised clock dress
Put, be spaced layer switch, digital electricity meter and digital electricity meter tester, described digital electricity meter tester includes simulation number
Word converter, digital power source, standard digital electric energy meter, Error Calculator；When virtual load verifies, using digital power source as letter
Number source, the signal of output is simultaneously into the standard digital electric energy meter in measured number electric energy meter and digital powermeter verification instrumeter, quilt
The Error Calculator surveyed in the pulse signal access digital electricity meter tester of digital electricity meter output；In real load check,
Using three-phase program-controlled power source as signal source, the three-phase voltage three-phase current of output enters analog input combining unit, merges single
The data signal of member output enters interval layer switch, and the data signal for being spaced layer switch respectively enters digital electricity meter verification
The standard digital electric energy meter and tested digital electricity meter of instrument, output pulse signal accesses digital electricity meter tester respectively afterwards
Error calculator module；On described three-phase program-controlled power source, Synchronization Clock, interval layer switch, digital electricity meter school
It is standard configuration equipment to test instrument；Described analog input combining unit and digital electricity meter are equipment under test.This module is with digital work(
Rate source is signal source, it is possible to achieve multiple pilot projects：Digital electric energy meter shunt running, starting test project, the examination of sampled value interface
Test project, message response pilot project, network communication performance test project, elementary error experiment and error influence amount experiment item
Mesh, constant pilot project, error of time of day pilot project；Described standard configuration equipment can realize that equipment shares, described tested to set
It is standby different with content because of test object, it is conveniently replaceable.
The test event of digital electric energy meter experiment module includes：
301）False actuation test：When there was only voltage and no current in digital power source outgoing message, the electricity of tested electric energy meter is tested
Energy impulse；The voltage that digital power source exports during experiment should be the 115% of rated voltage；
Minimum test duration △ t are：, the experiment of 0.2S levels；Or, 0.5S
Level experiment；
Wherein：Every kilowatt-hour of umber of pulse of k-electric energy meter output, imp/（kW•h）；M-measuring unit number；Un-specified
Voltage, V；Imax-maximum current, A；
302）Starting test：Under conditions of rated voltage Un and power factor are 1, according to the numeral of corresponding class of accuracy
Change electric energy meter applies the starting current shown in following table respectively, tests the electrical energy pulse output of calibrated meter；
303）Sampled value input interface received optical power is tested：Digital power source exports standard compliant sampling value message；Will
Optical attenuator is serially connected between digital power source and digital electricity meter, the slowly decay of increase optical attenuator since 0, until number
Word electric energy meter does not receive data；Digitalized electrical energy meter is pulled up, is linked into light power meter, tests performance number now, now
Luminous power is the optical receiver sensitivity of digitalized electrical energy meter；
304）Sampled value input interface transmitting optical power is tested：The transmission optical fiber of digitalized electrical energy meter directly connects with light power meter
Connect, tester light transmit power is read by light power meter；
305）Normal message response test：The message of standard is sent using digital power source, test digitalized electrical energy meter whether can
Correctly show various parameters and sample values；
306）Exception message response test：The message 48h of standard is continuously sent out using digital power source, sets in message and occurs without
Frame losing, incorrect order are abnormal, and whether test digital electricity meter can record corresponding message anomalous event；
307）Network communication is tested：The message 48h of standard is continuously sent out using digital power source, message occurs without frame losing exception,
Test digital electricity meter whether recorded message anomalous event；
308）Elementary error is tested：Under defined reference condition, according to corresponding error testing point, in different specified electricity
Basic Error of Energy Meter when different capacity factor, different input currents is measured under pressure, rated current；Allow as needed
Increase or decrease error testing point；In order to verify that electric energy meter error is not set with rated voltage, rated current and is occurred larger
Change, it is desirable at least test two 2 groups of rated voltages, rated current；If the clear and definite actual motion voltage of user, electric current can be only
Corresponding one group of rated voltage, rated current is chosen to be calibrated；
309）Error influence amount is tested：The experiment of error influence amount includes the experiment of voltage influence amount, the experiment of frequency influence amount, negative phase sequence
Tested with harmonic effects amount；Voltage influence amount is tested in 0.9,1.0,1.1 times of Un, multiple power factor, 0.5,1.0,1.2 times of In
Under conditions of, digitalized electric energy Watch Error is tested respectively；Wherein Un is rated voltage；In is rated current；
Frequency influence amount is tested under conditions of frequency 49Hz, 50Hz, 51Hz, multiple power factor, 0.5,1.0,1.2 times of In,
Digitalized electric energy Watch Error is tested respectively；
Negative phase sequence is tested under Un and In with harmonic effects amount, tests positive phase sequence and reverse sequence respectively, when having harmonic wave with without harmonic wave
Electric energy metering error；
310）Instrument constant is tested：Under the conditions of rated voltage Un and maximum current Imax is applied, test in certain time period,
Whether the electrical energy pulse number of digitalized electrical energy meter output is consistent with the electric flux change shown on its display；
311）Error of time of day is tested：When reference temperature is 23 DEG C, in the range of normal working voltage, there is the number of clocking capability
The error of time of day of word electric energy meter internal clocking is no more than 0.5s/d.Digital electric energy meter experiment module can be conveniently realized
Each test event.
The full performance test module of digital metering Simulated training device include three-phase program-controlled power, digital electricity meter tester,
Electronic electric energy meter, analog input combining unit, in Synchronization Clock, interval layer switch, digital electricity meter, station level
Interchanger；Described digital electricity meter tester includes analog-digital converter, standard digital power source, standard digital electric energy meter
And Error Calculator；Described three-phase program-controlled power, digital electricity meter tester, electronic electric energy meter, in Synchronization Clock,
It is spaced layer switch, station level interchanger is standard configuration equipment；Analog input combining unit, digital electricity meter are equipment under test；
A) in the comparison of standard digital table and digital table to be tested, using the variable three-phase program-controlled power source of electric parameter as signal
Source, by analog input combining unit outgoing message signal to standard digital electric energy meter and digital electricity meter to be tested, mark
The output end of quasi- digital electricity meter and digital electricity meter to be tested is connected with Error Calculator；
B) in the comparison of electronic electric energy meter and digital table, using the variable three-phase program-controlled power source of electric parameter as signal source,
Electron formula electric energy meter and analog input combining unit, analog input combining unit output end and digital electric energy are exported simultaneously
Table is connected；Electronic electric energy meter, the output end of digital electricity meter are connected with error processor；
C) in the digitized measurement comprehensive test platform global error, using three-phase program-controlled power source as signal source, three-phase program-controlled work(
The three-phase voltage three-phase current signal of rate source output closes for analog-digital converter, the analog input of digital electricity meter tester
And the input signal of unit, analog input combining unit pass through wall switching layer and digital electricity meter and standard digital electric energy
Table is connected, and the output end of analog-digital converter is connected with the input of standard digital electric energy meter；Digital electricity meter, standard digital
The output end of electric energy meter is connected with Error Calculator；Described digital power source and standard digital electric energy meter, digital electricity meter phase
Even；The sampling value message of analog input combining unit output is clearly real in user as the input signal for being detected digital electric energy
The digitized measurement integration test when measuring different capacity factor, different input currents is tested under room rated voltage, rated current to put down
Platform global error.The ratio of the comparison for completing standard digital table and digital table to be tested, electronic electric energy meter and digital table can be facilitated
To the verification of, Semi-digital the digitized measurement comprehensive test platform global error.Can to digital electric energy metered system it is overall with
And all parts are detected, ensure the accuracy of the digital electric energy metered system by detection of platform；It can carry out for number
The engineering model research of word electric energy metered system, is advantageous to study the error source of digital electric energy metered system, error characteristics, is
Analyze the practical problems such as error in the application of digital electric energy metered system is overproof and theory analysis basis is provided；Can be remote in the lab
The error characteristics research of digital electric energy metered system under Cheng Jinhang field working conditions, i.e., real load condition reproduction.
In cabinet, described equipment under test can be accessed described standard configuration equipment by the equipment interface of cabinet
And/or in cabinet；Electronic mutual inductor tentative module, combining unit metering experiment module, digital electric energy meter experiment mould
The full performance test module of block, digital metering Simulated training device shares standard configuration equipment.Standard configuration equipment, which is realized, to be shared, and reduces standard configuration
The quantity of equipment, greatly reduces cost, and the replaceable of equipment under test is realized by interface, greatly reduce system weight and
Space hold.
Beneficial effect：
1st, data acquisition, analysis and the processing of all each test events of digitalized electric energy metering system comprehensive test platform are realized,
Management and control testing process.
2nd, Simulated computer Training and Learning, fault simulation, graduation examination, contest tourney are realized, is related to digital electric energy metrical
Total system wiring, operation principle, communication protocol, fault simulation and analysis, data extraction are with utilizing, daily various operations,
Can at any time, real-time online study, training, examination, training cost can be greatly reduced.
3rd, the digital electric energy metrical theoretical level and actual operational capacity of vast line gage work personnel is improved, is advantageous to
Accelerate national IN Construction.
4th, double field simulation contest is realized, the competitive spirit of emulation Training and Learning is improved, is easy to obtain more preferable
Practise effect.
Brief description of the drawings
Fig. 1 is the digitized measurement Simulated training apparatus structure schematic diagram of the present invention.
Fig. 2 is electronic mutual inductor tentative module schematic diagram of the present invention.
Fig. 3 is combining unit metering experiment module schematic diagram of the present invention.
Fig. 4 is digital electric energy meter experiment module schematic diagram of the present invention.
Fig. 5 is the full performance test module principle figure of digital metering Simulated training device of the present invention.
Fig. 6 is the Compare System figure of standard digital table of the present invention and digital table to be tested.
Fig. 7 is the Compare System figure of electronic electric energy meter of the present invention and digital table.
Fig. 8 is the digitized measurement comprehensive test platform global error system diagram of the present invention.
In figure：1- cabinets；2- display modules.
Embodiment
Technical scheme is described in further detail below in conjunction with Figure of description.
As shown in figure 1, a kind of multifunctional digital electric energy metering Training Simulation System, including two sets of the digitized measurement trainings
Simulator, two sets of the digitized measurement Simulated training devices are arranged at intervals；Every suit the digitized measurement Simulated training device wraps
Include cabinet 1, the electronic mutual inductor tentative module for carrying out electronic mutual inductor experiment, for combining unit metering realization
Combining unit measures experiment module, the digital electric energy meter experiment module realized for digital electric energy meter, for digital metering
The full performance test module of digital metering Simulated training device, display module 2 and the control mould of the full performance test of Simulated training device
Block, control module and electronic mutual inductor tentative module, combining unit metering experiment module, digital electric energy meter experiment module,
The full performance test module of digital metering Simulated training device, display module 2 are connected；The panel of cabinet 1 is provided with multiple equipment interface
The electronic mutual inductor tentative module, combining unit metering experiment module, digital electric energy meter experiment of cabinet 1 are built in connection
The full performance test module of module, digital metering Simulated training device；Electronic mutual inductor tentative module, combining unit metering experiment
The full performance test module of module, digital electric energy meter experiment module, digital metering Simulated training device include standard configuration equipment and
Equipment under test.
As shown in Fig. 2 in order to realize to electronic mutual inductor and electronic transducer calibration instrument+combining unit overall permanence
Analyzed, electronic mutual inductor tentative module includes standard potential transformer, standard current transformer, electronic type voltage sensing
Device, electronic type current sensor, combining unit, Synchronization Clock, wall hand over machine and electronic transducer calibration instrument；Electronics
For formula transformer tentative module using primary current, voltage as input signal, input signal enters normal voltage/current transformer simultaneously
With electronic type voltage/current transformer, the standard secondary singal access electronic mutual inductor of normal voltage/current transformer output
Tester, the small analog signal access electronic transducer calibration instrument and combining unit of electronic type voltage/current transformer output,
The FT3 signals access combining unit of electronic type voltage/current transformer output, the IEC61850-9 of combining unit output are first passed through
It is spaced layer switch and then accesses the input of electronic transducer calibration instrument.This module can be individually to electronic mutual inductor sheet
Body characteristic gives research and experimental test training, and using primary current, voltage as input signal, test electronic mutual inductor is Targets
Energy（Fundamental wave, harmonic wave）, communication performance, time performance, elementary error, absolute delay time response etc.；Checking electronic type transformers
Instrument not only can be analyzed individually electronic mutual inductor self character, and can be to electronic transducer calibration instrument+merging
Unit overall permanence is analyzed.
In order to realize boosting/up-flow and provide a test voltage/current signal, electronic mutual inductor tentative module also wraps
Three-phase program-controlled power source, increasing apparatus, up-flow device are included, the input of increasing apparatus is connected with program controled power source, increasing apparatus
Output end be connected with standard potential transformer；The input of up-flow device is connected with three-phase program-controlled power source, flows up device
Output end is connected with standard current transformer；Three-phase program-controlled power source, increasing apparatus, up-flow device, standard potential transformer, mark
It is standard configuration equipment that quasi- current transformer, step clock apparatus, wall, which hand over machine machine and electronic transducer calibration instrument, electronic type voltage
Transformer, electronic current mutual inductor, combining unit are equipment under test.Three-phase program-controlled power source is as the boosted up-flow of signal source
Afterwards normal voltage/current transformer is respectively supplied to as a test current signal and test voltage signal；Standard configuration equipment can
Realize that equipment shares, equipment under test is conveniently replaceable because test object is different with content.
Electronic mutual inductor tentative module test event includes：
101）Basic accuracy test：For electronic current mutual inductor, basic accuracy test should be 1%（To S levels）, 5%,
20%, 100% and 120% rated current point is carried out；For measuring 0.2 grade and following current transformer, each measurement point is surveyed
Measure the ratio error and phase error when electric current rises；For electronic type voltage transformer, basic accuracy test 80%,
100%th, 120% rated voltage point is carried out；For measurement voltage is measured with 0.2 grade and following voltage transformer, each measurement point
Ratio error and phase error during rising；
102）Measurement reproducibility：This test is carried out simultaneously with elementary error measurement, calculates continuous n measurement arithmetic mean of instantaneous value
Experimental standard deviation；
103）Short-time stability：Rated current/voltage is applied with combining unit to tested metering, in same measurement point follow-on test
10min, the maximum and minimum value of tested metering combining unit error are drawn, maximum is subtracted into minimum value；
104）Stability of period：By the elementary error of last time measurement compared with this elementary error measured, count respectively
Calculate the difference of wallpaper error and the difference of phase error in result of the test twice；
105）Direct current biasing is tested：When it is zero that tested metering is with combining unit input signal, combining unit test device is used
Test the DC component of its output signal；
106）Multi-channel synchronous accuracy test：The difference of the amplitude error of electronic mutual inductor difference analog measurement passage is not
± 0.05% should be exceeded, the difference of phase error is no more than ± 2 '；Experiment is electronic type mutual inductance using three-phase alternating current simulation signal generator
Device adds specified threshold voltage, measures the amplitude error and phase error of each voltage channel and each current channel；
107）Three-phase imbalance load is tested：Three-phase imbalance refers to three-phase voltage passage and adds symmetrical three-phase reference voltage, Ren Yixiang
Current channel applies reference current, another biphase current passage no current；In the case of three-phase imbalance and phase shortage, metering is closed
And each channel measurement accuracy of voltage, electric current of unit answers coincidence loss to allow excursion requirement；For digital quantity input type
Metering combining unit no this item requirement；
108）The sampling value message response time tests：Tested transformer is in the case of without synchronisation source, by electronic mutual inductor school
The relative angular difference that equipment measures fundamental wave is tested, calculates the absolute time delay of electronic mutual inductor that primary current exports to MU；Measure
The absolute time delay of electronic mutual inductor should be less than 2ms, error should be not more than between the specified delay with combining unit demarcation
10us；
109）Integrity test：Combining unit test device judges that metering is sent out with combining unit according to the sampling value message received
The sampling value message sent whether packet loss, lose point, repetition, incorrect order, and record and send the cycle, the testing time should continue 24 more than h；
This test should be directed to different sampling value message configurations and carry out respectively, such as 1 APDU includes 1 ASDU or multiple ASDU
Deng；
110）Sampling value message sends periodic test：Combining unit test device record receive often bag sampling value message when
Carve, and calculate the interval time T between continuous two bag accordingly；Difference between T and nominal-sampling interval should meet that metering is used
Related request in combining unit technical conditions；Testing time should continue 24 more than h；Test should be directed to different sampled value reports
Text configuration is gone respectively；
111）Time keeping error is examined：Time keeping error passes through the MU 1PPS/ sampling synchronization pulses signals exported and reference clock source
1PPS signals compare acquisition；When test starts, metering combining unit first receives the time service of standard clock source, merging to be batched
After unit normal work, the time service of standard clock source is cancelled；Since at the time of cancelling time service, using time tester with per second
The pps pulse per second signal that the frequency measurement metering that measurement is 1 time is each exported with combining unit and standard clock source effectively between when
Between poor absolute value △ t, continuous to measure 10 min, the △ t measured in this period maximum is final testing result, △
T should be less than being equal to 4 μ s；
112）Pair when the experiment of abnormal signal situation：The signal during output pair of sampling pulse generator originating port 1,2,3, metering are used
Combining unit is in normal operating conditions；Change the output of clock source port 1, make that port 1 exports pair when signal lose
Can not the abnormal conditions such as true signal, dither signal, wrong frame, wrong check code, test and measuring combining unit by these abnormal feelings
The interference of condition simultaneously sends message by the correct sampling period.The various surveys of electronic mutual inductor tentative module can be conveniently realized
Examination project.
As shown in figure 3, carrying out various performance tests to analog input combining unit to realize, combining unit metering is real
Testing module includes three-phase program-controlled power source, analog input combining unit, Synchronization Clock, interval layer switch, merging list
First tester, combining unit measure experiment module using three-phase program-controlled power source as signal source, and output signal enters analog quantity simultaneously
Combining unit and combining unit tester are inputted, the IEC61850-9 of combining unit output first passes through interval layer switch and then connect
Enter combining unit tester；Three-phase program-controlled power source, Synchronization Clock, interval layer switch, combining unit tester are mark
With equipment, analog input combining unit is equipment under test.Combining unit metering experiment module can merge to analog input
The error characteristics of unit, error influence amount, communication performance, net synchronization capability are tested；Standard configuration equipment can realize that equipment shares, quilt
Measurement equipment is conveniently replaceable because test object is different with content.
The test event of combining unit metering experiment module includes：
201）The elementary error experiment under state and under asynchronous regime is synchronized to combining unit：Under reference condition, close
And the ratio error and phase error of cell voltage passage, current channel need to meet the error of the corresponding class of accuracy of combining unit
Limit value requirement, actual error curve must not exceed the broken line scope that error limitation line is formed；In the measurement electricity of combining unit
Circulation road according to 5%, 20%, 100%, 120% rated alternating current, measurement voltage channel according to 80%, 100%, 120% it is specified
Alternating voltage, apply power frequency analog quantity；Measurement channel is tested respectively using lock-out pulse method and constant time lag method, and test result takes
Rise, decline arithmetic mean of instantaneous value, two methods of the difference of the amplitude error of same passage is no more than ± 0.05%, phase error
Difference is no more than ± 2 '；
202）Difference between rising and falling is tested：In combining unit detection process, same test point presents basic in signal raising and lowering
Error change amount should be no more than 1/5 of error limit corresponding to corresponding class of accuracy；Difference between rising and falling measures to be surveyed with elementary error
Amount is carried out simultaneously, and measurement point is identical；Each elementary error measurement point is measured during signal raising and lowering, each measurement point is missed
Poor variable quantity should meet the requirements；
203）Measurement reproducibility is tested：Combining unit test repeatability index is not more than the limits of error corresponding to the class of accuracy
The 1/10 of value；Under reference condition, it is tested combining unit and applies rated voltage, current signal, continuously measure corresponding ratio error
And phase error, n measurement result, wherein n are read altogether>10, corresponding experimental standard deviation is calculated, as a result should be met the requirements；
204）Sample-synchronous error measure is tested：Under reference condition, it is tested combining unit and applies rated voltage, current signal,
Three-phase voltage interchannel, the phase difference value of three-phase current interchannel are measured, as a result should meet set quota requirement；
205）Temperature influences measurement experiment：Tested combining unit is placed in high-low temperature test chamber；Test temperature according to 23 DEG C, 33
DEG C, 23 DEG C, 13 DEG C, the lifting of 23 DEG C of order, keep 1h in each temperature spot, other reference conditions do not change, be tested merge it is single
Member applies rated voltage, current signal, measures its elementary error, respective measurement values are recorded after measurement result is stable；With reference bar
Measured value compares under part, and error change amount caused by temperature rising and decline should meet set quota requirement；
206）Frequency influence measurement experiment：Under reference condition, it is tested combining unit and applies rated voltage, current signal, respectively
Change voltage, current signal frequency, setting measurement point 45Hz, 48Hz, 49Hz, 50Hz, 51Hz, 52Hz, 55Hz, it is basic to measure its
Error, respective measurement values are recorded after measurement result is stable；Compared with measured value under reference condition, error caused by frequency change
Variable quantity should meet set quota requirement；
207）Harmonic effects measurement experiment；
208）Pair when error determine；
209）Time keeping error determines；
210）Step-out resynchronizes timing；
211）Sampled value issue centrifugal pump is examined.Each test item of combining unit metering experiment module can be conveniently realized
Mesh.
As shown in figure 4, in order to realize the experiment to being tested electric energy meter, digital electric energy meter experiment module includes three-phase program-controlled
Power source, analog input combining unit, Synchronization Clock, interval layer switch, digital electricity meter and digital electricity meter school
Instrument is tested, digital electricity meter tester includes analog-digital converter, digital power source, standard digital electric energy meter, Error Calculator；
When virtual load verifies, using digital power source as signal source, the signal of output is simultaneously into measured number electric energy meter and numeral electricity
Standard digital electric energy meter in energy table tester, the pulse signal access digital electricity meter tester of measured number electric energy meter output
In Error Calculator；In real load check, using three-phase program-controlled power source as signal source, the three-phase voltage three-phase current of output
Into analog input combining unit, the data signal of combining unit output enters interval layer switch, is spaced layer switch
Data signal respectively enters the standard digital electric energy meter of digital electricity meter tester and tested digital electricity meter, exports respectively afterwards
Pulse signal accesses the error calculator module of digital electricity meter tester；On three-phase program-controlled power source, Synchronization Clock,
Interlayer interchanger, digital electricity meter tester are standard configuration equipment；Analog input combining unit and digital electricity meter set to be tested
It is standby.This module is using digital power source as signal source, it is possible to achieve multiple pilot projects：Digital electric energy meter shunt running, starting test
Project, sampled value interface pilot project, message response pilot project, network communication performance test project, elementary error experiment with
And error influence amount pilot project, constant pilot project, error of time of day pilot project；Standard configuration equipment can realize that equipment shares,
Equipment under test is conveniently replaceable because test object is different with content.
The test event of digital electric energy meter experiment module includes：
301）False actuation test：When there was only voltage and no current in digital power source outgoing message, tested electric energy meter should not export
More than one electrical energy pulse；The voltage that digital power source exports during experiment should be the 115% of rated voltage；
Minimum test duration △ t are：, the experiment of 0.2S levels；Or,
0.5S levels are tested；
Wherein：Every kilowatt-hour of umber of pulse of k-electric energy meter output, imp/（kW•h）；M-measuring unit number；Un-specified
Voltage, V；Imax-maximum current, A；
302）Starting test：Under conditions of rated voltage Un and power factor are 1, according to the numeral of different class of accuracies
Change electric energy meter applies the starting current shown in following table respectively, the electrical energy pulse output of calibrated meter is tested, at the appointed time by school
Table should be able to start and at least export a pulse；
303）Sampled value input interface received optical power is tested：Digital power source exports standard compliant sampling value message；Will
Optical attenuator is serially connected between digital power source and digital electricity meter, the slowly decay of increase optical attenuator since 0, until number
Word electric energy meter does not receive data；Digitalized electrical energy meter is pulled up, is linked into light power meter, reads performance number now, now
Luminous power is the optical receiver sensitivity of digitalized electrical energy meter；
304）Sampled value input interface transmitting optical power is tested：The transmission optical fiber of digitalized electrical energy meter directly connects with light power meter
Connect, tester light transmit power is read by light power meter；
305）Normal message response test：The message of standard is sent using digital power source, digitalized electrical energy meter should be able to correctly show
Show various parameters and sample values；
306）Exception message response test：The message 48h of standard is continuously sent out using digital power source, sets in message and occurs without
Frame losing, incorrect order etc. are abnormal, and digital electricity meter should be able to record corresponding message anomalous event；
307）Network communication is tested：The message 48h of standard is continuously sent out using digital power source, it is different that message occurs without frame losing etc.
Often, digital electricity meter does not answer recorded message anomalous event；
308）Elementary error is tested：Under defined reference condition, according to the error testing point of following table recommendation, different specified
Basic Error of Energy Meter when different capacity factor, different input currents is measured under voltage, rated current；Permit as needed
Permitted to increase or decrease error testing point；In order to verify electric energy meter error with rated voltage, rated current set and occur compared with
It is big to change, it is desirable at least to test two 2 groups of rated voltages, rated current；If the clear and definite actual motion voltage of user, electric current can
Corresponding one group of rated voltage, rated current is only chosen to be calibrated；
309）Error influence amount is tested：The experiment of error influence amount includes the experiment of voltage influence amount, the experiment of frequency influence amount, negative phase sequence
Tested with harmonic effects amount；Voltage influence amount is tested in 0.9,1.0,1.1 times of Un, multiple power factor, 0.5,1.0,1.2 times of In
Under conditions of, digitalized electric energy Watch Error is tested respectively；Wherein Un is rated voltage；In is rated current；
Frequency influence amount is tested under conditions of frequency 49Hz, 50Hz, 51Hz, multiple power factor, 0.5,1.0,1.2 times of In,
Digitalized electric energy Watch Error is tested respectively；
Negative phase sequence is tested under Un and In with harmonic effects amount, tests positive phase sequence and reverse sequence respectively, when having harmonic wave with without harmonic wave
Electric energy metering error；
310）Instrument constant is tested：Under the conditions of rated voltage Un and maximum current Imax is applied, in certain time period, digitlization
The electrical energy pulse number of electric energy meter output should be consistent with the electric flux change shown on its display；
311）Error of time of day is tested：When reference temperature is 23 DEG C, in the range of normal working voltage, there is the number of clocking capability
The error of time of day of word electric energy meter internal clocking is no more than 0.5s/d.Digital electric energy meter experiment module can be conveniently realized
Each test event.
As shown in figure 5, the entirety of digital electric energy metered system is detected in order to realize, digital metering Simulated training dress
Putting full performance test module includes three-phase program-controlled power, digital electricity meter tester, electronic electric energy meter, analog input merging
On unit, Synchronization Clock, it is spaced layer switch, digital electricity meter, station level interchanger；Digital electricity meter tester includes
Analog-digital converter, standard digital power source, standard digital electric energy meter and Error Calculator；Three-phase program-controlled power, numeral electricity
Can table tester, electronic electric energy meter, in Synchronization Clock, interval layer switch, station level interchanger be standard configuration equipment；Mould
Analog quantity input combining unit, digital electricity meter are equipment under test；
A) in the comparison of standard digital table and digital table to be tested, as shown in fig. 6, with the variable three-phase program-controlled work(of electric parameter
Rate source is signal source, by analog input combining unit outgoing message signal to standard digital electric energy meter and numeral to be tested
The output end of electric energy meter, standard digital electric energy meter and digital electricity meter to be tested is connected with Error Calculator；
B) in the comparison of electronic electric energy meter and digital table, as shown in fig. 7, with the variable three-phase program-controlled power source of electric parameter
For signal source, while electron formula electric energy meter and analog input combining unit are exported, analog input combining unit output end
It is connected with digital electricity meter；Electronic electric energy meter, the output end of digital electricity meter are connected with error processor；
C) in the digitized measurement comprehensive test platform global error, as shown in figure 8, using three-phase program-controlled power source as signal source,
The three-phase voltage three-phase current signal of three-phase program-controlled power source output is analog-digital converter, the mould of digital electricity meter tester
Analog quantity inputs the input signal of combining unit, and analog input combining unit passes through wall switching layer and digital electricity meter and mark
Quasi- digital electricity meter is connected, and the output end of analog-digital converter is connected with the input of standard digital electric energy meter；Digital electric energy
Table, the output end of standard digital electric energy meter are connected with Error Calculator；Digital power source and standard digital electric energy meter, digital electric energy
Table is connected；The sampling value message of analog input combining unit output is bright in user as the input signal for being detected digital electric energy
The digitized measurement synthesis when different capacity factor, different input currents are measured under true laboratory rated voltage, rated current is surveyed
Try platform global error.Comparison, electronic electric energy meter and the digital table of standard digital table and digital table to be tested can conveniently be completed
Comparison, Semi-digital the digitized measurement comprehensive test platform global error verification.Can be to the whole of digital electric energy metered system
Body and all parts are detected, and ensure the accuracy of the digital electric energy metered system by detection of platform；The hand-manipulating of needle can be entered
The engineering model of digital electric energy metered system is studied, is advantageous to study the error source of digital electric energy metered system, error spy
Property, to analyze the practical problems such as error in the application of digital electric energy metered system is overproof, to provide theory analysis basic；It can test
Room medium-long range carries out the error characteristics research of digital electric energy metered system under field working conditions, i.e., real load condition reproduction.
In order to simplify structure and be conveniently replaceable equipment under test, for standard configuration equipment in cabinet 1, equipment under test passes through cabinet 1
The equipment interface access system of panel；Electronic mutual inductor tentative module, combining unit metering experiment module, digital electric energy meter
The full performance test module of experiment module, digital metering Simulated training device shares standard configuration equipment.Standard configuration equipment, which is realized, to be shared, and is reduced
The quantity of standard configuration equipment, greatly reduces cost, realizes the replaceable of equipment under test by interface, greatly reduce system
Weight and space hold.
The perfect functions of modules of the system and equipment interface can easily access electronic mutual inductor, combining unit, numeral
Change the digitizer such as electric energy meter, whole digitalized electric energy metering system is carried out Training and Learning, theoretical research, simulation calculation,
The many researchs and survey such as fault simulation, Analysis on communication performances, verification experimental verification, error checking, graduation examination, contest tourney
Examination.Staff can at any time, real-time online study, training, examination, training cost can be greatly reduced, shorten work people
The training and learning time of member, accelerate the popularization and application of digitalized electric energy metering system.
In double real-time on-line simulation contest, two sets of the digitized measurement Simulated training devices of the system are positioned over 2
Adjacent room, more than 2 meters are spaced between two devices, to avoid electromagnetic interference.
A kind of multifunctional digital electric energy metering Training Simulation System shown in figure 1 above -8 is the specific implementation of the present invention
Example, has embodied substantive distinguishing features of the present invention and progress, can be right under the enlightenment of the present invention according to the use needs of reality
It carries out shape, the equivalent modifications of structure etc., this programme protection domain row.
Claims (10)
- A kind of 1. multifunctional digital electric energy metering Training Simulation System, it is characterised in that：Including two sets of the digitized measurement trainings Simulator, two sets of the digitized measurement Simulated training devices are arranged at intervals；Every suit the digitized measurement Simulated training device wraps Include cabinet, the electronic mutual inductor tentative module for carrying out electronic mutual inductor experiment, for combining unit metering realization Combining unit measures experiment module, the digital electric energy meter experiment module realized for digital electric energy meter, for digital metering The full performance test module of digital metering Simulated training device, display module and the control mould of the full performance test of Simulated training device Block, described control module are tested with electronic mutual inductor tentative module, combining unit metering experiment module, digital electric energy meter The full performance test module of module, digital metering Simulated training device, display module are connected；Cabinet connects provided with multiple equipment Mouth is real to connect the electronic mutual inductor tentative module for being built in cabinet, combining unit metering experiment module, digital electric energy meter Test the full performance test module of module, digital metering Simulated training device；Described electronic mutual inductor tentative module, combining unit Measuring experiment module, digital electric energy meter experiment module, the full performance test module of digital metering Simulated training device includes mark With equipment and equipment under test.
- A kind of 2. multifunctional digital electric energy metering Training Simulation System according to claim 1, it is characterised in that：It is described Electronic mutual inductor tentative module include standard potential transformer, standard current transformer, electronic type voltage transformer, electronics Formula current transformer, combining unit, Synchronization Clock, wall hand over machine and electronic transducer calibration instrument；Electronic type mutual inductance For device tentative module using primary current, voltage as input signal, input signal enters normal voltage/current transformer and electronics simultaneously Formula voltage/current transformer, the standard secondary singal access checking electronic type transformers of normal voltage/current transformer output Instrument, the small analog signal access electronic transducer calibration instrument and combining unit of electronic type voltage/current transformer output, electronics The signal access combining unit of formula voltage/current transformer output, combining unit output end are directly accessed electronic mutual inductor school Test instrument input or first pass through interval layer switch and then access the input of electronic transducer calibration instrument.
- A kind of 3. multifunctional digital electric energy metering Training Simulation System according to claim 2, it is characterised in that：It is described Electronic mutual inductor tentative module also include three-phase program-controlled power source, increasing apparatus, up-flow device, described increasing apparatus Input is connected with program controled power source, and the output end of increasing apparatus is connected with standard potential transformer；Described up-flow device Input is connected with three-phase program-controlled power source, and the output end for flowing up device is connected with standard current transformer；Described three-phase journey Power source, increasing apparatus, up-flow device, standard potential transformer, standard current transformer, step clock apparatus, wall is controlled to hand over Machine machine and electronic transducer calibration instrument are standard configuration equipment, described electronic type voltage transformer, electronic current mutual inductor, conjunction And unit is equipment under test.
- A kind of 4. multifunctional digital electric energy metering Training Simulation System according to claim 3, it is characterised in that：It is described Electronic mutual inductor tentative module test event include：101）Basic accuracy test：For electronic current mutual inductor, basic accuracy test is in 1%, 5%, 20%, 100% He 120% rated current point is carried out；For measuring 0.2 grade and following current transformer, each measurement point measurement electric current rises When ratio error and phase error；For electronic type voltage transformer, basic accuracy test is specified 80%, 100%, 120% Electrical voltage point is carried out；For measurement with 0.2 grade and following voltage transformer, ratio when each measurement point measurement voltage rises misses Difference and phase error；102）Measurement reproducibility：This test is carried out simultaneously with elementary error measurement, calculates continuous n measurement arithmetic mean of instantaneous value Experimental standard deviation；103）Short-time stability：Rated current/voltage is applied with combining unit to tested metering, in same measurement point follow-on test 10min, the maximum and minimum value of tested metering combining unit error are drawn, maximum is subtracted into minimum value；104）Stability of period：By the elementary error of last time measurement compared with this elementary error measured, count respectively Calculate the difference of wallpaper error and the difference of phase error in result of the test twice；105）Direct current biasing is tested：When it is zero that tested metering is with combining unit input signal, combining unit test device is used Test the DC component of its output signal；106）Multi-channel synchronous accuracy test：The difference of the amplitude error of electronic mutual inductor difference analog measurement passage is not ± 0.05% should be exceeded, the difference of phase error is no more than ± 2 '；Experiment is electronic type mutual inductance using three-phase alternating current simulation signal generator Device adds specified threshold voltage, measures the amplitude error and phase error of each voltage channel and each current channel；107）Three-phase imbalance load is tested：Three-phase imbalance refers to three-phase voltage passage and adds symmetrical three-phase reference voltage, Ren Yixiang Current channel applies reference current, another biphase current passage no current；In the case of three-phase imbalance and phase shortage, metering is closed And each channel measurement accuracy of voltage, electric current of unit answers coincidence loss to allow excursion requirement；For digital quantity input type Metering combining unit no this item requirement；108）The sampling value message response time tests：Tested transformer is in the case of without synchronisation source, by electronic mutual inductor school The relative angular difference that equipment measures fundamental wave is tested, calculates the absolute time delay of electronic mutual inductor that primary current exports to MU；Test Error between the specified delay of absolute time delay and the combining unit demarcation of electronic mutual inductor；109）Integrity test：Combining unit test device judges that metering is sent out with combining unit according to the sampling value message received The sampling value message sent whether packet loss, lose point, repetition, incorrect order, and record and send the cycle, the testing time continues 24 more than h；This Item testing needle is carried out respectively to different sampling value message configurations；110）Sampling value message sends periodic test：Combining unit test device record receive often bag sampling value message when Carve, and calculate the interval time T between continuous two bag accordingly；Difference between T and nominal-sampling interval should meet that metering is used Related request in combining unit technical conditions；Testing time continues 24 more than h；This is tested for different sampling value messages to match somebody with somebody Put；111）Time keeping error is examined：Time keeping error passes through the MU 1PPS/ sampling synchronization pulses signals exported and reference clock source 1PPS signals compare acquisition；When test starts, metering combining unit first receives the time service of standard clock source, merging to be batched After unit normal work, the time service of standard clock source is cancelled；Since at the time of cancelling time service, using time tester with per second The pps pulse per second signal that the frequency measurement metering that measurement is 1 time is each exported with combining unit and standard clock source effectively between when Between poor absolute value △ t, continuous measurement a period of time, the △ t measured in this period maximum is final testing result, △ t are less than or equal to 4 μ s；112）Pair when the experiment of abnormal signal situation：The signal during output pair of sampling pulse generator originating port 1,2,3, metering are used Combining unit is in normal operating conditions；Change the output of clock source port 1, make that port 1 exports pair when signal lose Can not the abnormal conditions such as true signal, dither signal, wrong frame, wrong check code, test and measuring combining unit by these abnormal feelings The interference of condition simultaneously sends message by the correct sampling period.
- A kind of 5. multifunctional digital electric energy metering Training Simulation System according to claim 1, it is characterised in that：It is described Combining unit metering experiment module include three-phase program-controlled power source, analog input combining unit, Synchronization Clock, interval Layer switch, combining unit tester, combining unit measure experiment module using three-phase program-controlled power source as signal source, output signal Enter analog input combining unit and combining unit tester simultaneously, combining unit output end is directly accessed combining unit test Instrument first passes through interval layer switch and then accesses combining unit tester；Described three-phase program-controlled power source, synchronised clock Device, interval layer switch, combining unit tester are standard configuration equipment, and described analog input combining unit sets to be tested It is standby.
- A kind of 6. multifunctional digital electric energy metering Training Simulation System according to claim 5, it is characterised in that：Merge The test event of unit metering experiment module includes：201）The elementary error experiment under state and under asynchronous regime is synchronized to combining unit：Under reference condition, close And the ratio error and phase error of cell voltage passage, current channel need to meet the error of the corresponding class of accuracy of combining unit Limit value requirement, actual error curve must not exceed the broken line scope that error limitation line is formed；In the measurement electricity of combining unit Circulation road according to 5%, 20%, 100%, 120% rated alternating current, measurement voltage channel according to 80%, 100%, 120% it is specified Alternating voltage, apply power frequency analog quantity；Measurement channel is tested respectively using lock-out pulse method and constant time lag method, and test result takes Rise, decline arithmetic mean of instantaneous value, test amplitude error, the difference of phase error of same passage two methods of；202）Difference between rising and falling is tested：In combining unit detection process, same test point presents basic in signal raising and lowering Error change amount should be no more than 1/5 of error limit corresponding to corresponding class of accuracy；Difference between rising and falling measures to be surveyed with elementary error Amount is carried out simultaneously, and measurement point is identical；Each elementary error measurement point is measured during signal raising and lowering, tests each measurement Point tolerance variable quantity；203）Measurement reproducibility is tested：Combining unit test repeatability index is not more than the limits of error corresponding to the class of accuracy The 1/10 of value；Under reference condition, it is tested combining unit and applies rated voltage, current signal, continuously measure corresponding ratio error And phase error, n measurement result, wherein n are read altogether>10, calculate corresponding experimental standard deviation；204）Sample-synchronous error measure is tested：Under reference condition, it is tested combining unit and applies rated voltage, current signal, Measure three-phase voltage interchannel, the phase difference value of three-phase current interchannel；205）Temperature influences measurement experiment：Tested combining unit is placed in high-low temperature test chamber；Test temperature according to 23 DEG C, 33 DEG C, 23 DEG C, 13 DEG C, the lifting of 23 DEG C of order, keep 1h in each temperature spot, other reference conditions do not change, be tested merge it is single Member applies rated voltage, current signal, measures its elementary error, respective measurement values are recorded after measurement result is stable；With reference bar Measured value compares under part, error change amount caused by test temperature rising and decline；206）Frequency influence measurement experiment：Under reference condition, it is tested combining unit and applies rated voltage, current signal, respectively Change voltage, current signal frequency, setting measurement point 45Hz, 48Hz, 49Hz, 50Hz, 51Hz, 52Hz, 55Hz, it is basic to measure its Error, respective measurement values are recorded after measurement result is stable；Compared with measured value under reference condition, caused by test frequency change Error change amount；207）Harmonic effects measurement experiment；208）Pair when error determine；209）Time keeping error determines；210）Step-out resynchronizes timing；211）Sampled value issue centrifugal pump is examined.
- A kind of 7. multifunctional digital electric energy metering Training Simulation System according to claim 1, it is characterised in that：Numeral Formula electric energy meter experiment module includes three-phase program-controlled power source, analog input combining unit, Synchronization Clock, wall and exchanged Machine, digital electricity meter and digital electricity meter tester, described digital electricity meter tester include analog-digital converter, numeral Power source, standard digital electric energy meter, Error Calculator；When virtual load verifies, using digital power source as signal source, the letter of output It is number simultaneously defeated into the standard digital electric energy meter in measured number electric energy meter and digital powermeter verification instrumeter, measured number electric energy meter Error Calculator in the pulse signal access digital electricity meter tester gone out；In real load check, with three-phase program-controlled power Source is signal source, and the three-phase voltage three-phase current of output enters analog input combining unit, the numeral letter of combining unit output Number enter interval layer switch, be spaced layer switch data signal respectively enter digital electricity meter tester standard digital electricity Energy table and tested digital electricity meter, output pulse signal accesses the Error Calculator mould of digital electricity meter tester respectively afterwards Block；On described three-phase program-controlled power source, Synchronization Clock, interval layer switch, digital electricity meter tester set for standard configuration It is standby；Described analog input combining unit and digital electricity meter are equipment under test.
- A kind of 8. multifunctional digital electric energy metering Training Simulation System according to claim 7, it is characterised in that：Numeral The test event of formula electric energy meter experiment module includes：301）False actuation test：When there was only voltage and no current in digital power source outgoing message, the electricity of tested electric energy meter is tested Energy impulse；The voltage that digital power source exports during experiment should be the 115% of rated voltage；Minimum test duration △ t are：, the experiment of 0.2S levels；Or, 0.5S Level experiment；Wherein：Every kilowatt-hour of umber of pulse of k-electric energy meter output, imp/（kW·h）；M-measuring unit number；- volume Determine voltage, V；- maximum current, A；302）Starting test：Under conditions of rated voltage Un and power factor are 1, according to the numeral of corresponding class of accuracy Change electric energy meter applies the starting current shown in following table respectively, tests the electrical energy pulse output of calibrated meter；303）Sampled value input interface received optical power is tested：Digital power source exports standard compliant sampling value message；Will Optical attenuator is serially connected between digital power source and digital electricity meter, the slowly decay of increase optical attenuator since 0, until number Word electric energy meter does not receive data；Digitalized electrical energy meter is pulled up, is linked into light power meter, tests performance number now, now Luminous power is the optical receiver sensitivity of digitalized electrical energy meter；304）Sampled value input interface transmitting optical power is tested：The transmission optical fiber of digitalized electrical energy meter directly connects with light power meter Connect, tester light transmit power is read by light power meter；305）Normal message response test：The message of standard is sent using digital power source, test digitalized electrical energy meter whether can Correctly show various parameters and sample values；306）Exception message response test：The message 48h of standard is continuously sent out using digital power source, sets in message and occurs without Frame losing, incorrect order are abnormal, and whether test digital electricity meter can record corresponding message anomalous event；307）Network communication is tested：The message 48h of standard is continuously sent out using digital power source, message occurs without frame losing exception, Test digital electricity meter whether recorded message anomalous event；308）Elementary error is tested：Under defined reference condition, according to corresponding error testing point, in different specified electricity Basic Error of Energy Meter when different capacity factor, different input currents is measured under pressure, rated current；Allow as needed Increase or decrease error testing point；In order to verify that electric energy meter error is not set with rated voltage, rated current and is occurred larger Change, it is desirable at least test two 2 groups of rated voltages, rated current；If the clear and definite actual motion voltage of user, electric current can be only Corresponding one group of rated voltage, rated current is chosen to be calibrated；309）Error influence amount is tested：The experiment of error influence amount includes the experiment of voltage influence amount, the experiment of frequency influence amount, negative phase sequence Tested with harmonic effects amount；Voltage influence amount is tested in 0.9,1.0,1.1 times of Un, multiple power factor, 0.5,1.0,1.2 times of In Under conditions of, digitalized electric energy Watch Error is tested respectively；Wherein Un is rated voltage；In is rated current；Frequency influence amount is tested under conditions of frequency 49Hz, 50Hz, 51Hz, multiple power factor, 0.5,1.0,1.2 times of In, Digitalized electric energy Watch Error is tested respectively；Negative phase sequence is tested under Un and In with harmonic effects amount, tests positive phase sequence and reverse sequence respectively, when having harmonic wave with without harmonic wave Electric energy metering error；310）Instrument constant is tested：Under the conditions of rated voltage Un and maximum current Imax is applied, test in certain time period, Whether the electrical energy pulse number of digitalized electrical energy meter output is consistent with the electric flux change shown on its display；311）Error of time of day is tested：When reference temperature is 23 DEG C, in the range of normal working voltage, there is the number of clocking capability The error of time of day of word electric energy meter internal clocking is no more than 0.5s/d.
- A kind of 9. multifunctional digital electric energy metering Training Simulation System according to claim 1, it is characterised in that：Numeral Measure Simulated training device full performance test module include three-phase program-controlled power, digital electricity meter tester, electronic electric energy meter, In analog input combining unit, Synchronization Clock, it is spaced layer switch, digital electricity meter, station level interchanger；Described Digital electricity meter tester includes analog-digital converter, standard digital power source, standard digital electric energy meter and Error Calculator； Described three-phase program-controlled power, digital electricity meter tester, electronic electric energy meter, in Synchronization Clock, interval layer switch, Station level interchanger is standard configuration equipment；Analog input combining unit, digital electricity meter are equipment under test；A) in the comparison of standard digital table and digital table to be tested, using the variable three-phase program-controlled power source of electric parameter as signal Source, by analog input combining unit outgoing message signal to standard digital electric energy meter and digital electricity meter to be tested, mark The output end of quasi- digital electricity meter and digital electricity meter to be tested is connected with Error Calculator；B) in the comparison of electronic electric energy meter and digital table, using the variable three-phase program-controlled power source of electric parameter as signal source, Electron formula electric energy meter and analog input combining unit, analog input combining unit output end and digital electric energy are exported simultaneously Table is connected；Electronic electric energy meter, the output end of digital electricity meter are connected with error processor；C) in the digitized measurement comprehensive test platform global error, using three-phase program-controlled power source as signal source, three-phase program-controlled work( The three-phase voltage three-phase current signal of rate source output closes for analog-digital converter, the analog input of digital electricity meter tester And the input signal of unit, analog input combining unit pass through wall switching layer and digital electricity meter and standard digital electric energy Table is connected, and the output end of analog-digital converter is connected with the input of standard digital electric energy meter；Digital electricity meter, standard digital The output end of electric energy meter is connected with Error Calculator；Described digital power source and standard digital electric energy meter, digital electricity meter phase Even；The sampling value message of analog input combining unit output is clearly real in user as the input signal for being detected digital electric energy The digitized measurement integration test when measuring different capacity factor, different input currents is tested under room rated voltage, rated current to put down Platform global error.
- 10. a kind of multifunctional digital electric energy metering Training Simulation System according to claim 1-9 any claims, It is characterized in that：In cabinet, described equipment under test can be connect described standard configuration equipment by the equipment interface of cabinet Enter and/or in cabinet；Electronic mutual inductor tentative module, combining unit metering experiment module, digital electric energy meter experiment The full performance test module of module, digital metering Simulated training device shares standard configuration equipment.
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