CN106990378A - A kind of alternating current filter group current transformer device for detecting polarity and method - Google Patents
A kind of alternating current filter group current transformer device for detecting polarity and method Download PDFInfo
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- CN106990378A CN106990378A CN201710338264.1A CN201710338264A CN106990378A CN 106990378 A CN106990378 A CN 106990378A CN 201710338264 A CN201710338264 A CN 201710338264A CN 106990378 A CN106990378 A CN 106990378A
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- filter group
- alternating current
- current
- current transformer
- current filter
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/72—Testing of electric windings
Abstract
The invention discloses a kind of alternating current filter group current transformer device for detecting polarity and method, device includes signal gathering unit and dosage detection unit, signal gathering unit is connected with tested alternating current filter group first and end current transformer respectively, the tested alternating current filter group head end The Rogowski Optical Current Transformer inner leads of output end one end access, the tested alternating current filter group end electronic current mutual inductor inner leads of other end access of dosage detection unit；Method is included by gathering signal determining alternating current filter group first and last end current transformer polarity based on signal gathering unit.The present invention can detect the fully sampled passage of alternating current filter group first and end current transformer simultaneously（Including body, secondary singal transmission channel, combining unit, protection equipment）Polarity, the workload of Check up polarity can be significantly reduced, with easy to implement, intuitively advantage.
Description
Technical field
The present invention relates to electrical engineering technology, and in particular to a kind of alternating current filter group current transformer device for detecting polarity
And method, for the fully sampled passage to alternating current filter group current transformer（Including body, secondary singal transmission channel, close
And including unit, protection equipment）Carry out Check up polarity.
Background technology
As the important means of trans-regional a wide range of resource distribution,（It is special）D.C. high voltage transmission has turned into national energy strategy
Important component.It is existing large quantities of nearly ten years（It is special）HVDC transmission system builds up and put into operation in succession, is ensureing the energy
Important function is played in terms of supply, Optimization of Energy Structure and transformation energy development pattern, the shadow in national economy, people's lives
Sound is increasingly great.Due to reactive power support and filtering demands,（It is special）Substantial amounts of alternating current filter group is configured in HVDC converter substation.
These alternating current filter groups include having concurrently filtering out harmonic wave, the HP/BP mode filters group of reactive power support and only possessing reactive power support work(
The SC type capacitor banks of energy.According to（It is special）HVDC conveys power, it is necessary to put into the alternating current filter group of respective model group number.
Thus, alternating current filter group normal work is influence（It is special）One of key factor of HVDC conveying reliability.
HVDC converter substation typically has more than ten group alternating current filter groups, and UHVDC converter station has nearly 20 groups of exchanges
Wave filter group.Each alternating current filter group has several current transformers, and wherein first and end current transformer is even more important, such as
There is problem in both polarity of fruit, such as polarity is inconsistent, fiber optic communication is interrupted, and will directly cause the main guarantor of alternating current filter group
Shield --- differential protection misoperation immediately, alternating current filter group are cut off by mistake, the availability of alternating current filter group are reduced, so that shadow
Ring（It is special）HVDC conveys reliability.
The Rogowski Optical Current Transformer and regular alternating current electricity is respectively adopted in current alternating current filter group first and end current transformer
Type current transformer.All the year round in running, first and end current transformer, particularly head end The Rogowski Optical Current Transformer are difficult
Exempt to need to change, need to carry out Check up polarity after replacing.Due to insulation, alternating current filter group head end photoelectrical current is mutual
Sensor arranges position general higher, and The Rogowski Optical Current Transformer secondary singal pattern and regular alternating current electronic current mutual inductor
Difference, its sampling channel includes substantial amounts of fiber optic communication, and Check up polarity workload is larger.If batch replacement alternating current filter group
Current transformer, such as head end The Rogowski Optical Current Transformer upgrading, detection workload are bigger.If having a kind of both easy to implement,
The method or apparatus of alternating current filter group first and end current transformer polarity can be detected simultaneously again, then can significantly be reduced
The workload of Check up polarity.
The existing method or apparatus for being related to current transformer Check up polarity is many, but simultaneously to alternating current filter group head end
The method or apparatus of The Rogowski Optical Current Transformer and end regular alternating current electronic current mutual inductor Check up polarity does not almost have.Such as
A kind of integral polarity test method for current mutual inductor, is carried disclosed in Application No. CN200910025893.4 Chinese patent literature
The polarity detection method to the electronic current mutual inductor secondary circuit of single analog output is gone out；Such as Application No.
A kind of current transformer polarity check system and polarity check method disclosed in CN201310319857.5 Chinese patent literature,
Propose the device for detecting polarity and method of the electronic type exported to individual digit amount or The Rogowski Optical Current Transformer Measurement channel；
A kind of current transformer device for detecting polarity as disclosed in CN201310373424.8 Chinese patent literature, it is proposed that to single
The device for detecting polarity of the electronic current mutual inductor body winding of analog output.
The content of the invention
The technical problem to be solved in the present invention：Above mentioned problem for prior art there is provided one kind can detect friendship simultaneously
Flow the fully sampled passage of wave filter group first and end current transformer（Including body, secondary singal transmission channel, combining unit, protection
Including equipment）Polarity, can significantly reduce the workload of Check up polarity, it is easy to implement, alternating current filter group intuitively
Current transformer device for detecting polarity and method.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：
On the one hand, the present invention provides a kind of alternating current filter group current transformer device for detecting polarity, including signal gathering unit
With the dosage detection unit for applying testing current amount in tested alternating current filter group primary circuit, the signal gathering unit
It is connected respectively with tested alternating current filter group first and end current transformer, output end one end access of the dosage detection unit
Tested alternating current filter group head end The Rogowski Optical Current Transformer inner leads, the tested alternating current filter group end electricity of other end access
Type current transformer inner leads, by the outside of the tested alternating current filter group head end The Rogowski Optical Current Transformer that has closed
Earth point and the earth on the outside of grounding switch, tested alternating current filter group end electronic current mutual inductor constitute test electric current and returned
Road.
Preferably, the output end of the dosage detection unit is three-phase output end or single-phase output end.
Preferably, the dosage detection unit use relay protection tester or complex automatic system tester, and it is described plus
Apply 50Hz of the alternating current more than 10A, the degree of accuracy of amount detection unit are not less than 0.2%.
Preferably, the signal gathering unit is using tested alternating current filter group protection equipment and Converter Station monitoring system
System.
On the other hand, the present invention also provides a kind of based on foregoing alternating current filter group current transformer device for detecting polarity
Alternating current filter group current transformer polarity detection method, implementation steps include：
1）The grounding switch on the outside of tested alternating current filter group head end The Rogowski Optical Current Transformer is closed in advance, pulls open grounding switch
The isolation switch in outside；
2）On the inside of the tested alternating current filter group head end The Rogowski Optical Current Transformer of output end one end access of dosage detection unit
Lead, the tested alternating current filter group end electronic current mutual inductor inner leads of other end access, by being tested ac filter
Outside grounding switch, tested alternating current filter group end electronic current mutual inductor on the outside of device group head end The Rogowski Optical Current Transformer
The earth point and the earth of side constitute tested current loop；
3）Pass sequentially through dosage detection unit and apply the n times testing current amount a specifiedi, and remembered respectively by signal gathering unit
Record sampled value b of alternating current filter group head end electric current transformeri, sampled value c of end current transformeriAnd head end electric current
Sampled value b of transformeriSampled value c of end current transformeriBoth departure di；
4）Judge all departure diNo more than the first prescribed skew threshold value, sampled value b of head end electric current transformeriWith it is right
Induced current test volume aiDifference be no more than the second prescribed skew threshold value, sampled value c of end current transformeriCorrespondingly
Testing current amount aiDifference no more than three kinds of conditions of the second prescribed skew threshold value whether simultaneously establishment, if set up simultaneously,
Then judge that tested alternating current filter group first and last end current transformer Check up polarity passes through, otherwise judge alternating current filter group it is first and
The detection of end current mutual inductor polarity does not pass through.
Preferably, the first prescribed skew threshold value is 1A；The second prescribed skew threshold value is 1A.
Preferably, step 3）The n times testing current amount a specified is applied by dosage detection unitiFor three-phase current or list
Phase current.
The alternating current filter group current transformer device for detecting polarity tool of the present invention has the advantage that：
The alternating current filter group current transformer device for detecting polarity of the present invention includes signal gathering unit and for by test cross
Flow the dosage detection unit that wave filter group primary circuit applies testing current amount, signal gathering unit respectively with tested ac filter
Device group first and end current transformer is connected, the tested alternating current filter group head end light of output end one end access of dosage detection unit
Draw on the inside of current transformer inner leads, the tested alternating current filter group end electronic current mutual inductor of other end access
Line, passes through the grounding switch on the outside of the tested alternating current filter group head end The Rogowski Optical Current Transformer that has closed, tested exchange filter
Earth point and the earth on the outside of ripple device group end electronic current mutual inductor constitute tested current loop, can be friendship of the invention
Flow wave filter group current transformer polarity detection method and hardware foundation is provided, detect alternating current filter group first and end Current Mutual Inductance
The fully sampled passage of device（Including body, secondary singal transmission channel, combining unit, protection equipment）Polarity, can be significantly
Reduction Check up polarity workload, dosage detection unit can be using relay protection tester, complex automatic system tester etc. two
Secondary dosage equipment, collecting unit can be using tested alternating current filter group protection equipment and Converter Station monitoring system, with being easy to
Implementation, intuitively advantage.
The alternating current filter group current transformer polarity detection method tool of the present invention has the advantage that：The exchange filter of the present invention
Ripple device group current transformer polarity detection method is the alternating current filter group current transformer device for detecting polarity based on the present invention
Application, the present invention alternating current filter group current transformer device for detecting polarity hardware foundation on, by passing sequentially through
Dosage detection unit applies the n times testing current amount a specifiedi, and alternating current filter group is recorded by signal gathering unit respectively
Sampled value b of head end electric current transformeri, sampled value c of end current transformeriOnce sampled with head end electric current transformer
Value biSampled value c of end current transformeriBoth departure di, and alternating current filter is judged based on above-mentioned collection signal
Whether group first and last end current transformer Check up polarity passes through, and can detect that alternating current filter group first and end current transformer is complete
Sampling channel（Including body, secondary singal transmission channel, combining unit, protection equipment）Polarity, can significantly drop
The workload of low Check up polarity, with easy to implement, intuitively advantage.
Brief description of the drawings
Fig. 1 is the application principle structural representation of device of the embodiment of the present invention.
Fig. 2 is the schematic flow sheet of present invention method.
Embodiment
Accompanying drawing 1 is applied to for the alternating current filter group current transformer device for detecting polarity of the present invention（It is special）HVDC is changed
Common HP type alternating current filter group schematic diagrames, mutual to its head end The Rogowski Optical Current Transformer, oxidising Fe formula electric current in stream station
The fully sampled passage of sensor（Including body, secondary singal transmission channel, combining unit, protection equipment）Carry out polarity inspection
Survey.Below in conjunction with the HP type alternating current filter groups shown in Fig. 1, the alternating current filter group current transformer polarity to the present invention is examined
Device is surveyed to be described in further detail.
Referring to Fig. 1, the alternating current filter group current transformer device for detecting polarity of the present embodiment includes signal gathering unit 1
With the dosage detection unit 2 for applying testing current amount in tested alternating current filter group primary circuit, 1 point of signal gathering unit
It is not connected with tested alternating current filter group first and end current transformer, output end one end of dosage detection unit 2 is accessed by test cross
Flow wave filter group head end The Rogowski Optical Current Transformer inner leads, the tested alternating current filter group end electronic type electricity of other end access
Current transformer inner leads, pass through the earthing on the outside of the tested alternating current filter group head end The Rogowski Optical Current Transformer that has closed
Earth point and the earth on the outside of lock, tested alternating current filter group end electronic current mutual inductor constitute tested current loop.
In the present embodiment, signal gathering unit 1 is used to observe tested alternating current filter group first and end current transformer sampling
Value and both departures, departure are the difference stream of alternating current filter group.Signal gathering unit 1 is using by test cross in the present embodiment
Wave filter group protection equipment and Converter Station monitoring system are flowed, so need not additionally increase equipment, cost is minimum, it is also most square
Just.
Dosage detection unit 2 use relay protection tester or complex automatic system tester, and dosage detection unit 2 can
Apply 50Hz of the alternating current more than 10A, the degree of accuracy and be not less than 0.2%.In the present embodiment, the use of dosage detection unit 2 can apply
0 ~ 20A, 50Hz alternating currents, the degree of accuracy are 0.2% relay protection tester, and the output end of dosage detection unit 2 exports for three-phase
End, the output of dosage detection unit 2 may be either three-phase current, or monophase current.In addition can also be as needed using single
Phase output terminal.
As shown in Fig. 2 the implementation steps of the alternating current filter group current transformer polarity detection method of the present embodiment include：
1）The grounding switch on the outside of tested alternating current filter group head end The Rogowski Optical Current Transformer is closed in advance, pulls open grounding switch
The isolation switch in outside；
2）On the inside of the tested alternating current filter group head end The Rogowski Optical Current Transformer of output end one end access of dosage detection unit 2
Lead, the tested alternating current filter group end electronic current mutual inductor inner leads of other end access, by being tested ac filter
Outside grounding switch, tested alternating current filter group end electronic current mutual inductor on the outside of device group head end The Rogowski Optical Current Transformer
The earth point and the earth of side constitute tested current loop；
3）Pass sequentially through dosage detection unit 2 and apply the n times testing current amount a specifiedi, and pass through signal gathering unit 2 respectively
Record sampled value b of alternating current filter group head end electric current transformeri, sampled value c of end current transformeriWith head end electricity
Sampled value b of current transformeriSampled value c of end current transformeriBoth departure di；In the present embodiment, step 3）
The n times testing current amount a specified is applied by dosage detection unit 2iFor three-phase current or monophase current；
4）Judge all departure diNo more than the first prescribed skew threshold value, sampled value b of head end electric current transformeriWith it is right
Induced current test volume aiDifference be no more than the second prescribed skew threshold value, sampled value c of end current transformeriCorrespondingly
Testing current amount aiDifference no more than three kinds of conditions of the second prescribed skew threshold value whether simultaneously establishment, if set up simultaneously,
Then judge that tested alternating current filter group first and last end current transformer Check up polarity passes through, otherwise judge alternating current filter group it is first and
The detection of end current mutual inductor polarity does not pass through.
In the present embodiment, step 3）It is middle to apply the 3 primary current test volume a specified1~a3, applied by dosage detection unit 2
Testing current amount a1, sampled value b of alternating current filter group first and end current transformer is recorded by signal gathering unit1、c1
With both departure d1；Testing current amount a is applied by dosage detection unit 22, pass through signal gathering unit record exchange filter
Sampled value b of ripple device group first and end current transformer2、c2With both departure d2；Electricity is applied by dosage detection unit 2
Current test amount a3, sampled value b of alternating current filter group first and end current transformer is recorded by signal gathering unit3、c3With
Both departure d3.Accordingly, step 4）In then specifically judge d1、d2、d3No more than the first prescribed skew threshold value, b1With a1
Difference, c1With a1Difference, b2With a2Difference, c2With a2Difference, b3With a3Difference, c3With a3Difference no more than the
Two prescribed skew threshold values, if nine set up simultaneously, judge tested alternating current filter group first and last end current transformer pole
Property detection pass through, otherwise judge that alternating current filter group first and last end current transformer Check up polarity does not pass through.
In the present embodiment, testing current amount a1=5.10A, is tested alternating current filter group head end electric current mutual inductor sample value b1=
5.41A, is tested alternating current filter group end current transformer sampled value c1=4.87A, is tested alternating current filter group difference stream d1=
0.54A.Testing current amount a2=10.10A, is tested alternating current filter group head end electric current mutual inductor sample value b2=10.48A, by test cross
Flow wave filter group end current mutual inductor sample value c2=9.97A, is tested alternating current filter group difference stream d2=0.51A.Testing current amount
a3=20.25A, is tested alternating current filter group head end electric current mutual inductor sample value b3=20.79A, is tested alternating current filter group end
Current transformer sampled value c3=20.15A, is tested alternating current filter group difference stream d3=0.64A.In the present embodiment, the first prescribed skew
Threshold value is 1A；Second prescribed skew threshold value is 1A.d1=0.54A、d2=0.51A、d3=0.64A is given no more than first inclined
Poor threshold value 1A, b1With a1Difference 0.31A, c1With a1Difference 0.23A, b2With a2Difference 0.38A, c2With a2Difference
0.13A、b3With a3Difference 0.54A, c3With a3Difference 0.1A be no more than the second prescribed skew threshold value 1A.Due to above-mentioned
Nine set up simultaneously, judge that tested alternating current filter group first and last end current transformer Check up polarity passes through.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (7)
1. a kind of alternating current filter group current transformer device for detecting polarity, it is characterised in that：Including signal gathering unit（1）With
Dosage detection unit for applying testing current amount in tested alternating current filter group primary circuit（2）, the signal acquisition list
Member（1）It is connected respectively with tested alternating current filter group first and end current transformer, the dosage detection unit（2）Output end
The tested alternating current filter group head end The Rogowski Optical Current Transformer inner leads of one end access, the tested alternating current filter of other end access
Group end electronic current mutual inductor inner leads, pass through the tested alternating current filter group head end photoelectrical current mutual inductance closed
Grounding switch on the outside of device, the earth point on the outside of tested alternating current filter group end electronic current mutual inductor and the earth are constituted and surveyed
Try current loop.
2. alternating current filter group current transformer device for detecting polarity according to claim 1, it is characterised in that：It is described to add
Amount detection unit（2）Output end be three-phase output end or single-phase output end.
3. alternating current filter group current transformer device for detecting polarity according to claim 1, it is characterised in that：It is described to add
Amount detection unit（2）Using relay protection tester or complex automatic system tester, and the dosage detection unit（2）Apply
Plus alternating current is more than 10A 50Hz, the degree of accuracy and is not less than 0.2%.
4. alternating current filter group current transformer device for detecting polarity according to claim 1, it is characterised in that：The letter
Number collecting unit（1）Using tested alternating current filter group protection equipment and Converter Station monitoring system.
5. a kind of exchange based on alternating current filter group current transformer device for detecting polarity described in claim 1 or 2 or 3 or 4
Wave filter group current transformer polarity detection method, it is characterised in that implementation steps include：
1）The grounding switch on the outside of tested alternating current filter group head end The Rogowski Optical Current Transformer is closed in advance, pulls open grounding switch
The isolation switch in outside；
2）By dosage detection unit（2）The tested alternating current filter group head end The Rogowski Optical Current Transformer of output end one end access in
Side lead, the tested alternating current filter group end electronic current mutual inductor inner leads of other end access, are filtered by tested exchange
Grounding switch, tested alternating current filter group end electronic current mutual inductor on the outside of ripple device group head end The Rogowski Optical Current Transformer
The earth point and the earth in outside constitute tested current loop；
3）Pass sequentially through dosage detection unit（2）Apply the n times testing current amount a specifiedi, and pass through signal gathering unit respectively
（2）Record sampled value b of alternating current filter group head end electric current transformeri, sampled value c of end current transformeriAnd head end
Sampled value b of current transformeriSampled value c of end current transformeriBoth departure di；
4）Judge all departure diNo more than the first prescribed skew threshold value, sampled value b of head end electric current transformeriWith it is right
Induced current test volume aiDifference be no more than the second prescribed skew threshold value, sampled value c of end current transformeriCorrespondingly
Testing current amount aiDifference no more than three kinds of conditions of the second prescribed skew threshold value whether simultaneously establishment, if set up simultaneously,
Then judge that tested alternating current filter group first and last end current transformer Check up polarity passes through, otherwise judge alternating current filter group it is first and
The detection of end current mutual inductor polarity does not pass through.
6. alternating current filter group current transformer polarity detection method according to claim 5, it is characterised in that described
One prescribed skew threshold value is 1A；The second prescribed skew threshold value is 1A.
7. alternating current filter group current transformer polarity detection method according to claim 5, it is characterised in that step 3）
Pass through dosage detection unit（2）Apply the n times testing current amount a specifiediFor three-phase current or monophase current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710338264.1A CN106990378A (en) | 2017-05-15 | 2017-05-15 | A kind of alternating current filter group current transformer device for detecting polarity and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710338264.1A CN106990378A (en) | 2017-05-15 | 2017-05-15 | A kind of alternating current filter group current transformer device for detecting polarity and method |
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| Publication Number | Publication Date |
|---|---|
| CN106990378A true CN106990378A (en) | 2017-07-28 |
Family
ID=59419661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710338264.1A Pending CN106990378A (en) | 2017-05-15 | 2017-05-15 | A kind of alternating current filter group current transformer device for detecting polarity and method |
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| CN (1) | CN106990378A (en) |
Cited By (1)
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| CN110456205A (en) * | 2019-09-06 | 2019-11-15 | 云南电网有限责任公司电力科学研究院 | A kind of alternating current filter out-of-balance current on-line monitoring method |
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Inventor after: Chen Yuehui Inventor after: Ao Fei Inventor after: Hong Quan Inventor after: Li Li Inventor after: Guo Siyuan Inventor after: Cai Yuhua Inventor after: Ou Yangfan Inventor after: Zhu Weijun Inventor after: Wu Jinbo Inventor after: Kang Wen Inventor after: Liu Haifeng Inventor after: Zhang Hong Inventor after: Chen Hong Inventor after: Fang Haixia Inventor after: Xiong Shangfeng Inventor after: Zheng Yingbin Inventor before: Wu Jinbo Inventor before: Hong Quan Inventor before: Li Li Inventor before: Guo Siyuan Inventor before: Cai Yuhua Inventor before: Ou Yangfan Inventor before: Zhu Weijun Inventor before: Kang Wen Inventor before: Liu Haifeng Inventor before: Zhang Hong Inventor before: Chen Hong Inventor before: Fang Haixia Inventor before: Xiong Shangfeng Inventor before: Zheng Yingbin Inventor before: Ao Fei |
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Application publication date: 20170728 |
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| WD01 | Invention patent application deemed withdrawn after publication |