CN108181599A - A kind of transformer station direct current system punching current transformer, which does not have a power failure, replaces check method - Google Patents
A kind of transformer station direct current system punching current transformer, which does not have a power failure, replaces check method Download PDFInfo
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- CN108181599A CN108181599A CN201711251646.7A CN201711251646A CN108181599A CN 108181599 A CN108181599 A CN 108181599A CN 201711251646 A CN201711251646 A CN 201711251646A CN 108181599 A CN108181599 A CN 108181599A
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- current
- power failure
- transformer
- mutual inductor
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
A kind of transformer station direct current system punching current transformer, which does not have a power failure, replaces check method, and the method introduces the digital split-core type meter of bypass and forms equivalent current mutual inductor, proposes that correctness checks judgment method, observes more each current value and checks accuracy；According to the mutual inductor branch method of operation is changed, the relationship of monitoring by-pass current and former branch current checks judgment method with reference to correctness, checks mutual inductor and replaces accuracy；Mutual inductor mode is replaced by using not having a power failure, compensates for have a power failure and replaces the deficiency of mutual inductor.
Description
Technical field
Do not have a power failure the present invention relates to a kind of transformer station direct current system punching current transformer and replace check method, belong to substation
Electrical secondary system operational management skill field.
Background technology
Transformer station direct current system such as is responsible for being monitored primary system equipment, controls, protects, adjusting at the functions, has and is
It unites wiring construction complexity, long-term the features such as running without interruption, is multi-point and wide-ranging；Meanwhile direct current instrument transformer can play insulating monitoring, return
The functions such as road monitoring, current monitoring, signal acquisition.Since there are maloperation, two by the way of the replacement direct current instrument transformer that has a power failure
The security risks such as subsystem disabler, the problems such as being easy to cause equipment malfunction, monitors failure.
A kind of transformer station direct current system punching current transformer do not have a power failure replace check method inscape mainly have (1) number
Word split-core type meter, (2) 2 conducting wires.
Invention content
The object of the present invention is to it is lost to solve maloperation, electrical secondary system function existing for direct current instrument transformer power failure replacement
The problems such as effect, disclose a kind of transformer station direct current system punching current transformer do not have a power failure replace check method.It is neither mutual to direct current
The existing external condition of sensor does additional change, and does not influence the lasting safe operation of direct current instrument transformer place circuit units, simultaneously
Accuracy can also be examined.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is：A kind of transformer station direct current system punching
Current transformer do not have a power failure replace check method, the method meter and changed transformer circuit safety continuous operation, introduce bypass
Equivalent current mutual inductor proposes that correctness checks judgment method, observes more each current value and checks accuracy；According to being changed mutual inductance
The device branch method of operation, the relationship of monitoring by-pass current and former branch current check judgment method with reference to correctness, check mutual inductance
Device replaces accuracy；Mutual inductor mode is replaced by using not having a power failure, compensates for have a power failure and replaces the deficiency of mutual inductor.
A kind of transformer station direct current system punching current transformer of the present invention, which does not have a power failure, replaces check method, equivalent current table branch
Road is as bypass, bringing onto load operation；It is made of 2 digital split-core type meters, 2 conducting wires, equivalent current table branch is born as bypass, band
Carrying row.Conducting wire is connected into dc bus first；Secondly conducting wire other end is connected into direct current instrument transformer to be replaced and loads survey
And pass through the jaw of digital split-core type meter；Last reading evidence starts to replace punching current transformer.
The number split-core type meter, gear is adjustable, supports DC current measurement, and range is reasonable, and error precision is qualified.
The conducting wire has red, black two kinds of colors, and sectional area is identical, and sectional area is led with length with being replaced transformer circuit
Line length matches.
A kind of transformer station direct current system punching current transformer of present invention the step of the replacing check method that do not have a power failure is as follows：
(1) conducting wire connects positive and negative dc bus, switch, clamps, securely；
(2) conducting wire connects direct current instrument transformer load-side to be replaced, clamps, securely；
(3) conducting wire passes through the jaw of the correct digital split-core type meter of gear；
(4) correctness, which is checked, judges
Wiring is correct and resistors match, should meet before replacing direct current instrument transformer：
In formula,The first Current Transmit is changed to flow through1Electric current,The second Current Transmit is changed to flow through2
Electric current,To flow through the first digital split-core type meter CT3Electric current,To flow through the second digital split-core type meter CT4Electric current,It is
CT1Branch current initial value,It is CT2Branch current initial value.
First switch QK1 is disconnected, and is met at this time：
Second switch QK2 is disconnected, and is met at this time：
Mutual inductor replacement finishes, and is closed first switch QK1, second switch QK2, and formula (1) is set up.
The advantageous effect of the present invention compared with the prior art is that a kind of transformer station direct current system punching electric current of the invention is mutual
Sensor, which does not have a power failure, replaces check method, is monitored by using the mode for introducing the digital split-core type meter composition equivalent current mutual inductor of bypass
Electric current carries out accuracy veritification, according to being changed the disconnection of mutual inductor branch switch, being closed, replaces mutual inductor, and observe more each
Road current relationship, judgment accuracy make up the deficiency that tradition power failure is replaced.
The present invention is suitable for transformer station secondary system operational management skill.
Description of the drawings
Fig. 1 does not have a power failure for straight-flow system punching current transformer replaces check figure.
Specific embodiment
Present example by straight-flow system punching current transformer do not have a power failure replace check figure form.
Straight-flow system punching current transformer, which does not have a power failure, replaces check figure, by the first digital split-core type meter CT3, second number pincers
Type table CT4, conducting wire, mutual inductor to be changed and its branch, switch, load form.
The committed step that the present invention is embodied：
(1) conducting wire connects positive and negative dc bus, switch, and conducting wire connects direct current instrument transformer load to be replaced and surveys, and conducting wire is worn
Cross gear correctly digital split-core type meter jaw；
(2) correctness checks judgment method.
Wiring is correct and resistors match, meets before replacing direct current instrument transformer：
In formula,The first Current Transmit is changed to flow through1Electric current,The second Current Transmit is changed to flow through2
Electric current,To flow through the first digital split-core type meter CT3Electric current,To flow through the second digital split-core type meter CT4Electric current,It is
First Current Transmit1Branch current initial value,It is the first digital split-core type meter CT3CT2Branch current initial value.
First switch QK1 is disconnected, and is met at this time：
Second switch QK2 is disconnected, and is met at this time：
Mutual inductor replacement finishes, and is closed first switch QK1, second switch QK2, and formula (1) is set up.
In conclusion a kind of transformer station direct current system punching current transformer of the present invention, which does not have a power failure, replaces check method,
It is made up of 2 digital split-core type meters, 2 conducting wires.Instance analysis is more exchanged with using a DC loop mutual inductor, demonstrates mutual inductance
Device, which does not have a power failure, replaces the accuracy of check.
The specific embodiment of the present invention is described, but these explanations cannot be understood to limit above in association with attached drawing
The scope of the present invention.Without departing from the spirit and scope of the present invention, the present invention also has corresponding changes and improvements,
These changes and improvements require to fall into the range of claimed invention.Protection scope of the present invention by claims, define.
Claims (4)
1. a kind of transformer station direct current system punching current transformer, which does not have a power failure, replaces check method, which is characterized in that the method
The operation of transformer circuit safety continuous is counted and is changed, introduces bypass equivalent current mutual inductor, proposes correctness check judgment method,
More each current value of observation checks accuracy；According to the mutual inductor branch method of operation is changed, monitoring by-pass current and former branch are electric
The relationship of stream checks judgment method with reference to correctness, checks mutual inductor and replaces accuracy；Mutual inductor is replaced by using not having a power failure
Mode compensates for have a power failure and replaces the deficiency of mutual inductor.
2. a kind of transformer station direct current system punching current transformer according to claim 1, which does not have a power failure, replaces check method,
It is characterized in that, comprising bypass equivalent current mutual inductor structure with connecting.
3. a kind of transformer station direct current system punching current transformer according to claim 1, which does not have a power failure, replaces check method,
It is characterized in that, mutual inductor, which does not have a power failure, replaces accuracy check judgment mode.
4. a kind of transformer station direct current system punching current transformer according to claim 1, which does not have a power failure, replaces check method,
It is characterized in that, the method step is：
(1) conducting wire connects positive and negative dc bus, first switch and second switch；Conducting wire connects direct current instrument transformer load to be replaced
Side, test pencil connect with conducting wire and are inserted into gear correctly digital split-core type meter corresponding interface；
(2) correctness checks judgment method
Wiring is correct and resistors match, should meet before replacing direct current instrument transformer：
In formula,The first Current Transmit is changed to flow through1Electric current,The second Current Transmit is changed to flow through2Electricity
Stream,To flow through the first digital split-core type meter CT3Electric current,To flow through the second digital split-core type meter CT4Electric current,It is CT1's
Branch current initial value,It is CT2Branch current initial value.
First switch QK1 is disconnected, and is met at this time：
Second switch QK2 is disconnected, and is met at this time：
Mutual inductor replacement finishes, and is closed first switch QK1, second switch QK2, and formula (1) is set up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711251646.7A CN108181599B (en) | 2017-12-01 | 2017-12-01 | Uninterrupted replacement and checking method for core-through current transformer of transformer substation direct-current system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711251646.7A CN108181599B (en) | 2017-12-01 | 2017-12-01 | Uninterrupted replacement and checking method for core-through current transformer of transformer substation direct-current system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108181599A true CN108181599A (en) | 2018-06-19 |
| CN108181599B CN108181599B (en) | 2020-06-16 |
Family
ID=62545501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711251646.7A Expired - Fee Related CN108181599B (en) | 2017-12-01 | 2017-12-01 | Uninterrupted replacement and checking method for core-through current transformer of transformer substation direct-current system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108181599B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108896948A (en) * | 2018-06-20 | 2018-11-27 | 成都理工大学 | A kind of no-load voltage ratio measuring device and measuring method of tandem test potential device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101408597A (en) * | 2007-10-12 | 2009-04-15 | 红相电力（上海）有限公司 | Method of electrified checkout of current mutual inductor |
| CN202486304U (en) * | 2011-11-08 | 2012-10-10 | 国网电力科学研究院 | High voltage current transformer on-line verifying device |
| US20170063072A1 (en) * | 2015-08-31 | 2017-03-02 | Eaton Corporation | Controlled power-up scheme for an electronic trip unit, and circuit interrupter employing same |
| CN107192975A (en) * | 2017-06-06 | 2017-09-22 | 国家电网公司 | A kind of test device of transformer |
| CN207516534U (en) * | 2017-12-01 | 2018-06-19 | 国网江西省电力有限公司检修分公司 | A kind of transformer station direct current system punching current transformer, which does not have a power failure, replaces capacity checking device |
-
2017
- 2017-12-01 CN CN201711251646.7A patent/CN108181599B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101408597A (en) * | 2007-10-12 | 2009-04-15 | 红相电力（上海）有限公司 | Method of electrified checkout of current mutual inductor |
| CN202486304U (en) * | 2011-11-08 | 2012-10-10 | 国网电力科学研究院 | High voltage current transformer on-line verifying device |
| US20170063072A1 (en) * | 2015-08-31 | 2017-03-02 | Eaton Corporation | Controlled power-up scheme for an electronic trip unit, and circuit interrupter employing same |
| CN107192975A (en) * | 2017-06-06 | 2017-09-22 | 国家电网公司 | A kind of test device of transformer |
| CN207516534U (en) * | 2017-12-01 | 2018-06-19 | 国网江西省电力有限公司检修分公司 | A kind of transformer station direct current system punching current transformer, which does not have a power failure, replaces capacity checking device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108896948A (en) * | 2018-06-20 | 2018-11-27 | 成都理工大学 | A kind of no-load voltage ratio measuring device and measuring method of tandem test potential device |
| CN108896948B (en) * | 2018-06-20 | 2023-03-21 | 成都理工大学 | Transformation ratio measuring device and method for cascade test transformation equipment |
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| Publication number | Publication date |
|---|---|
| CN108181599B (en) | 2020-06-16 |
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Granted publication date: 20200616 Termination date: 20211201 |