CN108120949A - A kind of intelligent electric energy meter accelerated degradation test method - Google Patents
A kind of intelligent electric energy meter accelerated degradation test method Download PDFInfo
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- CN108120949A CN108120949A CN201810001578.7A CN201810001578A CN108120949A CN 108120949 A CN108120949 A CN 108120949A CN 201810001578 A CN201810001578 A CN 201810001578A CN 108120949 A CN108120949 A CN 108120949A
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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Abstract
The present invention relates to a kind of intelligent electric energy meter accelerated degradation test methods, comprise the following steps：S1, the reason for determining to cause field electric energy table failure；S2, the failure cause determined according to step S1 combine the accelerated stress type for result of the test selection accelerated degradation test of knowing the real situation；S3, maximum stress level is determined by experiment of knowing the real situation and designs accelerated stress combination；S4, as needed definite degenerative character amount and its failure threshold, number of test specimens, allocation proportion, off-test time and pendulous frequency；S5, it is continuously applied corresponding stress combination respectively to each group test specimen, is combined at interval of setting time unloading stress and tests the parameter of needs, until reaches the off-test time.Compared with prior art, the present invention has higher feasibility and operability, and reliability evaluation and analysis are carried out to intelligent electric energy meter suitable for electric energy meter manufacturer and electric energy meter quality management department.
Description
Technical field
The present invention relates to measuring equipments to run calibrating detection technique field, is moved back more particularly, to a kind of acceleration of intelligent electric energy meter
Change test method.
Background technology
In recent years, with the continuous propulsion of state grid corporation of smart grid construction process, more and more intelligence electric energy
The scene operation of table input.2017, the in-site installation quantity of intelligent electric energy meter had reached 400,000,000 in state's net firm-wide.Number
Amount so huge intelligent electric energy meter at the scene can reliably and with long-term, stable operation be directly related to the public affairs of electricity transaction process
It is flat, just.In addition, intelligent electric energy meter is as knowing customer side electricity consumption behavior, " data source header " with electrical feature, consumption habit,
Its reliability, stability can also impact the quality towards customer side for power supply service.
The research for carrying out intelligent electric energy meter accelerated degradation test and its Life Assessment Technology can be to carry out intelligence in next step
Electric energy meter fail-safe analysis provides technical support and theoretical foundation with life appraisal work.It is reliable by being carried out to intelligent electric energy meter
Property analysis and life appraisal, electric energy meter manufacture producer can find the weak link of product design or the matter of component in advance
Defect is measured, and is pointedly improved, so as to the whole quality level for improving intelligent electric energy meter, ensures intelligent electric energy meter existing
Field energy is enough reliably and with long-term, stable operation.
Carrying out reliability evaluation to intelligent electric energy meter using traditional method for evaluating reliability needs to spend the very big time
Cost and human cost, therefore the method for widely used accelerated life test at present comments the reliability of intelligent electric energy meter
Valency.Accelerated life test only records the out-of-service time data of test specimen, and without considering the detailed process of product failure, therefore need
Experiment could be terminated by having a certain number of samples that failure occurs.If there is no sample to fail or fail sample in experiment
The quantity of product is seldom, then it can only just extend test period, it otherwise can not be using the out-of-service time data obtained come to product
The evaluation result that reliability is evaluated or drawn has very big gap with actual conditions.However, with intelligent electric energy meter skill
The unification of art standard and electric energy meter producer manufacture and design the raising of ability, and the reliability of present intelligent electric energy meter is higher and higher,
The sample size to fail in experiment is few, and accelerated life test can not meet intelligent electric energy meter fail-safe analysis and evaluation
Requirement.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of intelligent electric energy meter adds
Fast degradation test method.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of intelligent electric energy meter accelerated degradation test method, comprises the following steps：
S1, the reason for determining to cause field electric energy table failure；
S2, the failure cause determined according to step S1 combine the accelerated stress for result of the test selection accelerated degradation test of knowing the real situation
Type；
S3, maximum stress level is determined by experiment of knowing the real situation and designs accelerated stress combination；
S4, as needed definite degenerative character amount and its failure threshold, number of test specimens, allocation proportion, off-test
Time and pendulous frequency；
S5, it is continuously applied corresponding stress combination respectively to each group test specimen, stress group is unloaded at interval of setting time
Merge the parameter that test needs, until reaching the off-test time.
Preferably, include the reason for the electrical energy meter fault：Show failure, communication failure, metering fault, power-supply battery event
Barrier and software fault.
Preferably, the accelerated stress type is temperature and humidity.
Preferably, the principle of the definite maximum stress level is：Ensure performance degradation machine of the product under maximum stress
Reason does not change, and consistent with product failure mechanism at the scene or failure mechanism.
Preferably, the maximum stress level is：Temperature is 85 DEG C, relative humidity 95%.
Preferably, the design accelerated stress combination specifically includes：For each stress types, 3 kinds are at least used
Different stress levels ensures that the accelerated factor of every two kinds of stress combination is differed more than setting range.
Preferably, the accelerated stress combination includes 5 kinds：Temperature is 85 DEG C, relative humidity 95%；Temperature for 85 DEG C,
Relative humidity is 85%；Temperature is 85 DEG C, relative humidity 75%；Temperature is 75 DEG C, relative humidity 85%；Temperature is 65
DEG C, relative humidity 95%.
Preferably, the degenerative character amount is elementary error and error of time of day.
Preferably, the failure threshold of the degenerative character amount is the 55%~65% of its error limit.
Preferably, the off-test time is determined by the method for Censoring.
Compared with prior art, the present invention causes the main original of the live intelligent electric energy meter failure being currently running by analysis
Cause has chosen temperature and humidity as accelerated stress, passes through experiment and the analysis to accelerated factor of knowing the real situation, it is determined that maximum accelerates
Accelerated stress combination after stress level and optimization, has higher feasibility and operability, suitable for electric energy meter factory
Family and electric energy meter quality management department carry out reliability evaluation and analysis to intelligent electric energy meter.
Description of the drawings
Fig. 1 is flow chart of the method for the present invention；
Fig. 2 is the elementary error curve under stress level [85 DEG C, 95%] in experiment of knowing the real situation.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to
Following embodiments.
Embodiment
As shown in Figure 1, a kind of intelligent electric energy meter accelerated degradation test method, comprises the following steps：
S1, the reason for determining to cause field electric energy table failure；
S2, the failure cause determined according to step S1 combine the accelerated stress for result of the test selection accelerated degradation test of knowing the real situation
Type；
S3, maximum stress level is determined by experiment of knowing the real situation and designs accelerated stress combination；
S4, as needed definite degenerative character amount and its failure threshold, number of test specimens, allocation proportion, off-test
Time and pendulous frequency；
S5, it is continuously applied corresponding stress combination respectively to each group test specimen, stress group is unloaded at interval of setting time
Merge the parameter that test needs, until reaching the off-test time.
The definite of accelerated stress combination is the key that accelerated degradation test, and this method causes the event of field electric energy table by analysis
The reason for barrier, determines the type of accelerated stress, determines maximum stress level by knowing the real situation experiment, and considers experiment number
It is optimized according to uniformity and Usefulness Pair the accelerated stress combination of distribution.
Accelerated degradation test frequently with accelerated stress have temperature, humidity, impact vibration, electric stress, dust, salt fog etc..
Cause scene that can determine accelerated stress class with reference to the result for experiment of knowing the real situation the reason for transport intelligent electric energy meter failure by analysis
Type.
For scene fortune intelligent electric energy meter, the fault type often occurred include display failure, communication failure, metering therefore
Barrier, power-supply battery failure, software fault etc..It is pointed out in research data, in the various failures that scene occurs in fortune intelligent electric energy meter,
Communication failure, metering fault and display three kinds of fault type accountings of failure are the largest, and are respectively 35%, 27% and 22%, are drawn
The reason for playing failure mainly chip (computation chip, carrier chip, 485 chips etc.), integrated circuit, component and display screen event
Barrier.
It is analyzed with reference to actual operating conditions, communication failure can directly affect the acquisition of power user power consumption information acquisition system
Success rate causes Utilities Electric Co. not enter an item of expenditure in the accounts in time, accurately；Metering fault can influence the accuracy of metering device metric results,
The interests of electricity transaction both sides are likely to damage；Display failure generally refer to electric energy meter liquid crystal display occur blank screen or
Display portion field, since current widely used long-distance meter-reading system carrys out the power information of copy reading user, so display failure
Electricity transaction process can't be caused to directly affect, belong to acceptable fault type, wouldn't tested.
It is analyzed for the main reason for causing site intelligent electric energy meter communication failure and metering fault, it may be determined that accelerate
The accelerated stress type that degradation experiment should select.Pointed out in related data, temperature can cause electronic component generate parameter drift,
Physical damnification or electrical property decline, and can change the performance and physical dimension of its material, result even in failure of insulation or member
Device is burnt, therefore temperature is to influence the principal element of component and chip reliability.Meanwhile humidity can aggravate integrated circuit plate
Electrochemical corrosion, the dielectric strength and dielectric level of integrated circuit plate are reduced, so as to cause the generation of short circuit or open circuit.Cause
This, selects accelerated stress of the temperature and humidity as accelerated degradation test in the present embodiment.
The definite principle of accelerated degradation test maximum accelerated stress is to ensure performance degradation machine of the product under maximum stress
Reason does not change, and consistent with product failure mechanism at the scene or failure mechanism.To determine accelerated degradation test most
Big stress carries out experiment of knowing the real situation in the present embodiment to certain a collection of 2 grades of single-phase intelligent electric energy meter, and test data is as shown in Figure 2.
It is learnt by Fig. 2, when temperature-humidity modification of application is [85 DEG C, 95%], the performance degradation mechanism of intelligent electric energy meter
Do not change, therefore horizontal [85 DEG C, 95%] of temperature-humidity modification may be selected as maximum stress level, i.e. TmaxFor 85 DEG C, RHmax
For 95%.
Hallberg-Peck temperature-Humidity Model can be expressed as with unified linear forms：
Wherein, ξiFor the life characteristics of product；For stress SiFunction；A, b is constant.Intelligence electricity is understood by above formula
The life characteristic of energy table is approximate to obey linear distribution model.To improve " linearity " of model, in accelerated degradation test, for
Each stress (temperature and humidity) type will at least use 3 kinds of different stress levels.Define centre and low temperature
Stress level is spent, is denoted as T respectivelymedAnd Tmin；Define centre and low relative humidity stress level, RH is denoted as respectivelymed
And RHmin.5 groups of stress of selection are combined in the present embodiment, as shown in table 1：
1 temperature of table-humidity accelerated stress combination
| Sequence number | Stress S | T/℃ | RH/% |
| S1 | Tmin, RHmax | 65 | 95 |
| S2 | Tmed, RHmax | 75 | 95 |
| S3 | Tmax, RHmin | 85 | 75 |
| S4 | Tmax, RHmed | 85 | 85 |
| S5 | Tmax, RHmax | 85 | 95 |
Assuming that product is S using stress levelo, product is in stress So、SiUnder life characteristic values be ξo、ξi, then it is warm-wet
Degree model accelerated factor be：
The accelerated factor of different stress combinations is as shown in table 2 in table 1：
The accelerated factor of the different stress combinations of table 2
| Sequence number | Stress combines | Accelerated factor AF |
| S1 | [65 DEG C, 95%] | 162.33 |
| S2 | [75 DEG C, 95%] | 359.30 |
| S3 | [85 DEG C, 75%] | 374.33 |
| S4 | [85 DEG C, 85%] | 544.91 |
| S5 | [85 DEG C, 95%] | 760.74 |
In test, the accelerated factor by adjusting the combination of every two kinds of stress differs more than setting range to carry out stress
Combinatorial Optimization, difference scope are specifically set according to practical experience.It can see by table 2：Stress combination S2With S3Accelerated factor
AF2≈AF3, illustrate that the acceleration effect that two kinds of stress combinations generate is essentially identical, this can cause the waste of experiment resource.To avoid
This waste, now by stress combination S2[75 DEG C, 85%] are adjusted to, accelerated factor is 257.36 at this time, can make accelerated factor
Distribution it is more uniform.Therefore, the accelerated stress combination of final choice is as shown in table 3：
Accelerated stress after table 3 optimizes combines
Metering and billing function be intelligent electric energy meter it is most basic be also most important function, therefore this method choose elementary error
The degenerative character amount mainly tested as accelerated degradation test with error of time of day.The measurement of two characteristic quantities is by sample
Product apply rated voltage UN, fundamental current Ib, power factorUnder conditions of measure.
The failure threshold D and JJG 596-2012 of degenerative character amount《Electronic type AC energy meter》Specified in electric energy meter base
This error is related with the error limit of error of time of day.Rule of thumb, generally take the 55%~65% of error limit to be used as to degenerate
The failure threshold of characteristic quantity in the present embodiment, preferably chooses 60%, i.e.,
If being more than corresponding failure threshold by the elementary error of sample table and error of time of day, that is, think the sample fails.
In the present embodiment, test specimen takes 150 2 grades of single-phase intelligent electric energy meters of the same production batch of same producer to carry out
Accelerated degradation test, the sample allocation proportion under 5 kinds of accelerated stress combinations is identical, is 0.2, i.e. under every group of accelerated stress combination
The sample size of accelerated degradation test is 30.
The method of Censoring is taken to terminate to test, maximum test period tMAXTake 1080 it is small when, i.e., 45 days.During measurement
Between put at equal intervals, i.e. under every group of accelerated stress when 24 is small to degenerative character amount carry out one-shot measurement, be 45 times.
In the present embodiment, step S4 is specifically included：
(1) by sample top application temperature-humidity modification in table 3 is added to combine each group respectively, and kept constant；
(2) every unloading applied temperature-humidity modification for 24 hours, recover to ambient temperature and moisture condition；
(3) test is performed, test event includes：Elementary error, error of time of day, cell voltage, starting test, shunt running examination
Test, basic function experiment, display, RS485 communication, record its Performance Degradation Data；
(4) repetitive process (1), (2), (3), until test period reaches maximum test period tMAX。
Elementary error, error of time of day, cell voltage should record data；Starting test, false actuation test, basic function examination
It tests, show, RS485 communications should record conclusion.The project testings sides such as elementary error, error of time of day, starting test, false actuation test
Method should meet the requirement of latest edition JJG 307, JJG 596 and state's net intelligent electric energy meter series company standard；Cell voltage passes through
Read DL/T 645-2007 Data Identifications 02800008H (Clock battery voltage) and 02800009H (power cut-off recording cell voltage)
It obtains；Basic function experiment refers to electric energy meter expense control function, including alarm and switching on operation；RS485 communication tests, which refer to, to be passed through
RS485 mode copy reading ammeter current electric quantities data, instantaneous voltage current power data, day freezing data, if copy reading success,
Judge that RS485 communications are normal, be otherwise recorded as exception.
Claims (10)
1. a kind of intelligent electric energy meter accelerated degradation test method, which is characterized in that comprise the following steps：
S1, the reason for determining to cause field electric energy table failure；
S2, the failure cause determined according to step S1 combine the accelerated stress class for result of the test selection accelerated degradation test of knowing the real situation
Type；
S3, maximum stress level is determined by experiment of knowing the real situation and designs accelerated stress combination；
S4, as needed definite degenerative character amount and its failure threshold, number of test specimens, allocation proportion, off-test time
And pendulous frequency；
S5, it is continuously applied corresponding stress combination respectively to each group test specimen, at interval of the combination of setting time unloading stress simultaneously
The parameter needed is tested, until reaching the off-test time.
A kind of 2. intelligent electric energy meter accelerated degradation test method according to claim 1, which is characterized in that the electric energy meter
The reason for failure, includes：Show failure, communication failure, metering fault, power-supply battery failure and software fault.
3. a kind of intelligent electric energy meter accelerated degradation test method according to claim 1, which is characterized in that the acceleration should
Power type is temperature and humidity.
4. a kind of intelligent electric energy meter accelerated degradation test method according to claim 1, which is characterized in that described to determine most
The principle of big stress level is：Ensure that performance degradation mechanism of the product under maximum stress does not change, and exist with product
The failure mechanism or failure mechanism at scene are consistent.
5. a kind of intelligent electric energy meter accelerated degradation test method according to claim 1, which is characterized in that the maximum should
Power level is：Temperature is 85 DEG C, relative humidity 95%.
6. a kind of intelligent electric energy meter accelerated degradation test method according to claim 1, which is characterized in that the design adds
Fast stress combination specifically includes：For each stress types, 3 kinds of different stress levels are at least used, ensure every two kinds
The accelerated factor of stress combination is differed more than setting range.
7. a kind of intelligent electric energy meter accelerated degradation test method according to claim 1, which is characterized in that the acceleration should
Power combination includes 5 kinds：Temperature is 85 DEG C, relative humidity 95%；Temperature is 85 DEG C, relative humidity 85%；Temperature for 85 DEG C,
Relative humidity is 75%；Temperature is 75 DEG C, relative humidity 85%；Temperature is 65 DEG C, relative humidity 95%.
A kind of 8. intelligent electric energy meter accelerated degradation test method according to claim 1, which is characterized in that the spy that degenerates
Sign amount is elementary error and error of time of day.
A kind of 9. intelligent electric energy meter accelerated degradation test method according to claim 1, which is characterized in that the spy that degenerates
The failure threshold of sign amount is the 55%~65% of its error limit.
A kind of 10. intelligent electric energy meter accelerated degradation test method according to claim 1, which is characterized in that the experiment
End time is determined by the method for Censoring.
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| CN109033532A (en) * | 2018-06-29 | 2018-12-18 | 北京航空航天大学 | A kind of zero voltage switch phase-shifting full-bridge power supply health state evaluation method |
| CN109143144A (en) * | 2018-08-31 | 2019-01-04 | 中国电力科学研究院有限公司 | A kind of temperature stepping strenuous test method and system of intelligent electric energy meter |
| CN109342982A (en) * | 2018-07-09 | 2019-02-15 | 中国兵器工业第五九研究所 | One kind is about digital multimeter acceleration service life test method |
| CN111025224A (en) * | 2020-01-07 | 2020-04-17 | 中国电力科学研究院有限公司 | Accelerated degradation test method for intelligent electric meter |
| CN111950165A (en) * | 2020-08-25 | 2020-11-17 | 北京合众伟奇科技有限公司 | Electric energy meter reliability analysis method under typical environment |
| CN112904268A (en) * | 2021-01-22 | 2021-06-04 | 国网浙江省电力有限公司舟山供电公司 | Electric energy meter replacement time prediction method based on salt spray aging and state monitoring |
| CN113642196A (en) * | 2021-10-14 | 2021-11-12 | 华中科技大学 | Reliability evaluation method, device and equipment for intelligent electric meter and storage medium |
| CN114266006A (en) * | 2021-12-17 | 2022-04-01 | 北京航空航天大学 | Evaluation method for uncertainty of accelerated degradation test measurement |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109033532A (en) * | 2018-06-29 | 2018-12-18 | 北京航空航天大学 | A kind of zero voltage switch phase-shifting full-bridge power supply health state evaluation method |
| CN109033532B (en) * | 2018-06-29 | 2022-09-02 | 北京航空航天大学 | Method for evaluating health state of zero-voltage switching phase-shifted full-bridge power supply |
| CN109342982A (en) * | 2018-07-09 | 2019-02-15 | 中国兵器工业第五九研究所 | One kind is about digital multimeter acceleration service life test method |
| CN109143144A (en) * | 2018-08-31 | 2019-01-04 | 中国电力科学研究院有限公司 | A kind of temperature stepping strenuous test method and system of intelligent electric energy meter |
| CN111025224A (en) * | 2020-01-07 | 2020-04-17 | 中国电力科学研究院有限公司 | Accelerated degradation test method for intelligent electric meter |
| CN111950165A (en) * | 2020-08-25 | 2020-11-17 | 北京合众伟奇科技有限公司 | Electric energy meter reliability analysis method under typical environment |
| CN111950165B (en) * | 2020-08-25 | 2024-04-12 | 北京合众伟奇科技股份有限公司 | Electric energy meter reliability analysis method under typical environment |
| CN112904268A (en) * | 2021-01-22 | 2021-06-04 | 国网浙江省电力有限公司舟山供电公司 | Electric energy meter replacement time prediction method based on salt spray aging and state monitoring |
| CN112904268B (en) * | 2021-01-22 | 2022-05-17 | 国网浙江省电力有限公司舟山供电公司 | Electric energy meter replacement time prediction method based on salt spray aging and state monitoring |
| CN113642196A (en) * | 2021-10-14 | 2021-11-12 | 华中科技大学 | Reliability evaluation method, device and equipment for intelligent electric meter and storage medium |
| CN114266006A (en) * | 2021-12-17 | 2022-04-01 | 北京航空航天大学 | Evaluation method for uncertainty of accelerated degradation test measurement |
| CN114266006B (en) * | 2021-12-17 | 2024-06-11 | 北京航空航天大学 | Evaluation method for measurement uncertainty of accelerated degradation test |
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