CN103364641B - A kind of transformer station's transient state electromagnetic environment test method - Google Patents
A kind of transformer station's transient state electromagnetic environment test method Download PDFInfo
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- CN103364641B CN103364641B CN201210094056.9A CN201210094056A CN103364641B CN 103364641 B CN103364641 B CN 103364641B CN 201210094056 A CN201210094056 A CN 201210094056A CN 103364641 B CN103364641 B CN 103364641B
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- 230000001052 transient effect Effects 0.000 title claims abstract description 42
- 238000010998 test method Methods 0.000 title claims abstract description 9
- 238000012360 testing method Methods 0.000 claims abstract description 59
- 238000000034 method Methods 0.000 claims abstract description 31
- 230000005855 radiation Effects 0.000 claims abstract description 5
- 230000002123 temporal effect Effects 0.000 claims abstract description 3
- 239000000523 sample Substances 0.000 claims description 16
- 238000002474 experimental method Methods 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 10
- 230000005684 electric field Effects 0.000 claims description 7
- 238000007405 data analysis Methods 0.000 claims description 2
- 238000012956 testing procedure Methods 0.000 claims 1
- 230000005672 electromagnetic field Effects 0.000 abstract description 14
- 238000011156 evaluation Methods 0.000 abstract description 5
- 230000005611 electricity Effects 0.000 description 7
- 230000005670 electromagnetic radiation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000036039 immunity Effects 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 208000032365 Electromagnetic interference Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
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Abstract
The present invention relates to a kind of method of testing of substation field transient state electromagnetic environment.Current steady-state method of test is not suitable for the test and evaluation of electromagnetic field intensity in transient state process of electric power system.The present invention uses non-frequency-selecting type broadband radiation measuring instrument in testing, and the background data of one stable state of test, transformer station's power frequency and radio frequency electrical, magnetic field background value are obtained using steady-state method of test before transformer station's transient process occurs；When transformer station transient process occurs, by record power frequency, radio frequency electrical, maximum field strength method obtain Temporal Data so that can analyze the interference free performance for the electronic equipment for being placed on the position meet requirement.The present invention can effectively measure power frequency, radio frequency electromagnetic field change in transient process in transformer station, assess of practical meaning to the electromagnetic environment that smart machine site in transformer station is installed.
Description
Technical field
The present invention relates to the test of transient process Electro Magnetic Compatibility in the transformer station related to power system, specifically
A kind of method of testing of substation field transient state electromagnetic environment.
Background technology
Source is harassed as one compared with strong electromagnetic radiation by transformer station, can operationally produce all kinds of electromagnetic interferences.With microelectronics
With the secondary device based on computer technology, such as relay protection, telemechanical, communication equipment are the sensitive subjects of interference, easily by
There are the abnormal operating states such as malfunction, program operation exception to interference effect, or even cause component or device damage.
For this transformer station secondary device be required to the experiment by all kinds of electromagnetism interferences after can come into operation, and equipment install
It is being electromagnetically shielded the preferable small interior of electronics.With power network intelligent substation all-round construction, transformer on-line checking terminal, protection with
Control intelligent terminal, the intelligent electronic device site such as electronic mutual inductor to install, these equipment from transformer station harassing and wrecking source more
Closely, running environment is worse.To that will face bigger using the interference free performance of smart machine on the spot of high-frequency low-voltage microprocessor
Challenge.
The heavier anti-interference test (EMC tests) regarding electronic product in current EMC test, and to power system
The test of transient state electromagnetic disturbance (EMI tests) is less, and most common harassing and wrecking source test (such as electric tool, household electrical appliance) is also
Carried out under experiment room environmental.The measuring method of Power System Electromagnetic Environment (harassing and wrecking), is also only limitted to power system and normally runs
Carried out under operating mode.Such as standard GB/T 998-2005《High-voltage alternating aerial power transmission line, transformer station's power frequency electric field and magnetic-field measurement
Method》, it is proposed that a kind of test for stable state power frequency electromagnet field intensity.This test is generally using the reading one per 1min
Number, take the survey measurements method of 5min average value normally run there is provided power system under electromagnetic environment evaluation.It is not suitable for
The test and evaluation of electromagnetic field intensity in the transient process such as short-circuit fault of power system and switch tool operation.In power system
In transient process except power frequency electromagnet outside the venue, mainly with the electromagnetic field in radio-frequency region.
The content of the invention
The technical problems to be solved by the invention be the defect for overcoming above-mentioned prior art to exist there is provided one kind in transformer station
The method of live Validity Test transient process electromagnetic field environment (harassing and wrecking degree).
Therefore, the present invention is adopted the following technical scheme that：A kind of transformer station's transient state electromagnetic environment test method, its test step
It is rapid as follows：
1) tester is selected：Selection meets the tester of international IEC61000-4 electromagnetic compatibility standards requirement, uses
Non- frequency-selecting type broadband radiation measuring instrument, measurement frequency be 24~2000Hz power frequency electric, magnetic field intensity, frequency be 100k~
30GHz radio frequency electrical, magnetic field intensity；
2) test point is selected：Select physical features flat, centered on the point for occurring transient interference source, from smart machine on the spot
On the circumference that distance delimited for radius, unobstructed position is taken as tester riding position；
3) test probe is installed：Hidden between the test probe requirement of tester and the point for producing transient interference source without object
Gear, test probe is placed on wooden pillar, from the ground 1~2m；
4) before transformer station transient process occurs one stable state of test background data, using read within every 1 minute a data,
The steady-state method of test of the average value of 3~5 data is taken to obtain transformer station's power frequency and radio frequency electrical, magnetic field background value；Transformer station
Transient process occur when, by record power frequency, radio frequency electrical, maximum field strength method obtain Temporal Data；Measuring instrument
The unit of the electric-field strength instantaneous value of reading is V/m, and unit of magnetic field strength is μ T, in air dielectric, and 1 μ T-phase is worked as in 0.8A/m,
Calculated by following equation：
Background value is calculated：
Changing value is calculated：Δ E1=E1max-Ep1, Δ B1=B1max-Bp1；
Δ E2=E2max-Ep2, Δ B2=B2max-Bp2；
In formula, Ep1/Bp1：Power frequency electric/magnetic field average；Ep2/Bp2：Radio frequency electrical/magnetic field average；n：Average value is read
Number of times, 3-5 times；E1max/B1max：Power frequency electric/maximum value of magnetic field；E2max/B2max：Radio frequency electrical/maximum value of magnetic field；ΔE1/
ΔB1：Transient state power frequency electric/changes of magnetic field value；ΔE2/ΔB2：Transient state radio frequency electrical/changes of magnetic field value；
5) data analysis：Can the interference free performance for the electronic equipment for being placed on the position be analyzed meet requirement.
Electromagnetic field feature is produced in research and analysis transient state process of electric power system of the present invention, and combines related electromagnetic compatibility state
Family's standard and actual condition, it is determined that electromagnetic field intensity frequency range and harassing and wrecking type in test transient state process of electric power system.According to transient state electricity
The characteristics of magnetic field, in the transient processes such as transformer station's isolation switch operation, arc short-circuit, ground short circuit produce electromagnetic field frequency domain compared with
Width, in testing using non-frequency-selecting type broadband radiation measuring instrument.It is that 24~2000HZ power frequency electric, magnetic field are strong to determine measurement frequency
Degree, frequency is 100k~30GHz radio frequency electrical, the big type of magnetic field intensity two.
Field measurement power frequency, radio frequency electrical, magnetic field value maximum should be less than highest ranking value in following standard：《Limit time-varying
The directive/guide (below 300GHz) that electric field, magnetic field and electromagnetic field expose to the open air》Professional exposure limit；GB/T 17626.8-1998 electromagnetism
Compatibility experiment and e measurement technology/power frequency magnetic field noise immunity experiment；GB/T 17626.3-1998 EMC tests and measurement skill
Art/radio frequency electromagnetic field radiation immunity experiment.
During test, test probe of the testing crew away from measuring instrument at least wants 2.5m；The ambient humidity of test site exists
Less than 80%；All need to read the background data before testing before each testing experiment.
The present invention can effectively measure power frequency, radio frequency electromagnetic field change in transient process in transformer station, to intelligence in transformer station
The electromagnetic environment that equipment site is installed is assessed of practical meaning.
With reference to embodiment, the invention will be further described.
Embodiment
The step of present invention measures transient electromagnetic field interference source in certain transformer station artificial earthing's short-circuit test is as follows：
1. tester is selected：8053A electromagnetic radiations analyzer and EHP-50C power frequencies probe from PMM companies, measurement
Frequency is 24~2000HZ power frequency electromagnetic field, and NBM550 electromagnetic radiation analyzer and EF0391 probes, and measurement frequency is
100k~30GHz rf electric field.
2. test point selection：Select physical features flat, centered on the point for occurring transient interference source, from smart machine on the spot
On the circumference that distance delimited for radius, unobstructed position is taken as test equipment riding position.
3. test probe is installed：At selected test position, test probe requirement (connects with producing the point in transient interference source
The short dot or switch, the disconnecting link to be operated of ground short circuit experiment) between blocked without object.Test probe is placed on wooden pillar
Above, 1~2m positions from the ground, to avoid passing through the support leakage current of measuring instrumentss；In order to measure safety, it is desirable to live ring
Border humidity should be below 80%；When testing electric-field intensity, tester should be remote enough from the probe of measuring instrumentss, generally
At least want 2.5m, it is to avoid larger electric field distortion is produced at instrument.
4. in order to test electricity, changes of magnetic field in transient state process of electric power system, it is necessary to before transient state process of electric power system generation
The background data of a stable state is tested, obtaining steady state data using the method for steady state test (reads average electricity, the magnetic in 1 minute
Field value), read 3~5 data and calculate power frequency and radio frequency electrical, magnetic field background value.
5. when measuring transient state electricity, magnetic field intensity, from the probe for meeting transient characteristic frequency, meter reading is reset, and is surveyed
Examination instrument is arranged under the pattern of record maximum, electricity, maximum field strength in record change procedure.
During test, testing crew should the probe away from measuring instrumentss it is remote enough, generally at least want 2.5m, experiment knot
Shu Hou, reads data from instrument.
6. the reading of electricity, magnetic field intensity measuring instrument table is reset, tested next time, degree should read examination before experiment every time
Background data before testing.
7. test data analyzer：According to the power frequency, the maximum of radio-frequency electromagnetic field intensity that test measurement is arrived several times, analysis
Can the interference free performance of the electronic equipment of the position is placed on meet requirement.
8. the evaluation criterion used：Each alarm of smart machine on the spot, abnormal information are detected in process of the test, detection is set on the spot
The standby sampled value and action behavior correctness uploaded.Electricity, magnetic field measured value should be less than such as following table electromagnetic environment evaluation criterion value：
Claims (4)
1. a kind of transformer station's transient state electromagnetic environment test method, its testing procedure is as follows：
1) tester is selected：Selection meets the tester of international IEC61000-4 electromagnetic compatibility standards requirement, using non-choosing
Frequency formula broadband radiation measuring instrument, measurement frequency is 24~2000Hz power frequency electric, magnetic field intensity, and frequency is 100k~30GHz's
Radio frequency electrical, magnetic field intensity；
2) test point is selected：Select physical features it is flat, centered on the point for occurring transient interference source, from smart machine on the spot with a distance from
On the circumference delimited for radius, unobstructed position is taken as tester riding position；
3) test probe is installed：Blocked between the test probe requirement of tester and the point for producing transient interference source without object,
Test probe is placed on wooden pillar, from the ground 1~2m；
4) background data of a stable state is tested before transformer station's transient process occurs, a data was read using every 1 minute, takes 3
The steady-state method of test of the average value of~5 data obtains transformer station's power frequency and radio frequency electrical, magnetic field background value；Transformer station's transient state
Process occur when, by record power frequency, radio frequency electrical, maximum field strength method obtain Temporal Data；Measuring instrument is read
The unit of electric-field strength instantaneous value be V/m, unit of magnetic field strength is μ T, in air dielectric, and 1 μ T-phase is pressed when in 0.8A/m
Row formula is calculated：
Background value is calculated：
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Changing value is calculated：Δ E1=E1max-Ep1, Δ B1=B1max-Bp1；
Δ E2=E2max-Ep2, Δ B2=B2max-Bp2；
In formula, Ep1/Bp1：Power frequency electric/magnetic field average；Ep2/Bp2：Radio frequency electrical/magnetic field average；n：Average value reads secondary
Number, 3-5 times；E1max/B1max：Power frequency electric/maximum value of magnetic field；E2max/B2max：Radio frequency electrical/maximum value of magnetic field；ΔE1/Δ
B1：Transient state power frequency electric/changes of magnetic field value；ΔE2/ΔB2：Transient state radio frequency electrical/changes of magnetic field value；
5) data analysis：Can the interference free performance for the electronic equipment for being placed on the position be analyzed meet requirement.
2. transformer station's transient state electromagnetic environment test method according to claim 1, it is characterised in that during test, testing crew
Test probe away from measuring instrument at least wants 2.5m.
3. transformer station's transient state electromagnetic environment test method according to claim 1, it is characterised in that the environment of test site
Humidity is below 80%.
4. transformer station's transient state electromagnetic environment test method according to claim 1, it is characterised in that before each testing experiment
All need to read the background data before testing.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103678808B (en) * | 2013-12-12 | 2017-04-05 | 中国能源建设集团广东省电力设计研究院有限公司 | Transformer station's electromagnetic field analogy method based on component library |
| CN103760427A (en) * | 2014-01-15 | 2014-04-30 | 国家电网公司 | Statistical method of power frequency electromagnetic field distribution rules in transformer substation |
| CN106448099B (en) * | 2016-08-31 | 2019-09-06 | 国网山东省电力公司菏泽供电公司 | A kind of ring network cabinet running environment remote supervision system |
| CN106324435B (en) * | 2016-08-31 | 2019-02-19 | 国网山东省电力公司菏泽供电公司 | A kind of controller switching equipment running environment monitoring method |
| CN106332108B (en) * | 2016-09-30 | 2019-11-12 | 深圳市吉祥腾达科技有限公司 | A kind of building method of the anti-interference test environment of household radio product |
| CN109039832B (en) * | 2018-09-29 | 2022-04-15 | 安徽众家云物联网科技有限公司 | Intelligent household electrical appliance communication reliability testing method |
| CN113945766B (en) * | 2021-09-23 | 2022-07-12 | 西安交通大学 | Electromagnetic compatibility testing method for transformer embedded sensor |
| CN115099180B (en) * | 2022-07-25 | 2022-11-15 | 广州地铁设计研究院股份有限公司 | Subway high-voltage direct-current power supply system EMI radiation source loop model and modeling method |
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|---|---|---|---|---|
| GB2102972A (en) * | 1981-07-22 | 1983-02-09 | Gen Electric Co Plc | Capacitor voltage transformers |
| JP2010025849A (en) * | 2008-07-23 | 2010-02-04 | Olympus Corp | Inspection apparatus |
| CN101504432A (en) * | 2009-01-24 | 2009-08-12 | 国网电力科学研究院 | Transient electromagnetic field measuring method for transforming plant |
| CN101571563A (en) * | 2009-06-04 | 2009-11-04 | 东方博沃（北京）科技有限公司 | Integrative electric energy quality monitoring terminal |
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