CN207516534U - A kind of transformer station direct current system punching current transformer, which does not have a power failure, replaces capacity checking device - Google Patents
A kind of transformer station direct current system punching current transformer, which does not have a power failure, replaces capacity checking device Download PDFInfo
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- CN207516534U CN207516534U CN201721652685.3U CN201721652685U CN207516534U CN 207516534 U CN207516534 U CN 207516534U CN 201721652685 U CN201721652685 U CN 201721652685U CN 207516534 U CN207516534 U CN 207516534U
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- 238000004080 punching Methods 0.000 title claims abstract description 13
- 238000005259 measurement Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 5
- 230000007812 deficiency Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
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- Supply And Distribution Of Alternating Current (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 capacity checking device, and described device is made of two switches and two ammeters.A termination positive direct-current busbar of first ammeter A1, one end connection first switch QK1, the other end of first switch connect the load end of the first tested current transformer；One end connection second switch QK2 of second ammeter A2, the other end of second switch connect the load end of the second tested current transformer.The utility model checks accuracy by observing more each current value；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 utility model is related to a kind of transformer station direct current system punching current transformer and replace capacity checking device, belong to and becoming
Power station 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.
Invention content
The purpose of this utility model is, in order to solve maloperation, electrical secondary system work(existing for direct current instrument transformer power failure replacement
The problems such as failing, disclose a kind of transformer station direct current system punching current transformer do not have a power failure replace capacity checking device.Neither to straight
The existing external condition of current transformer does additional change, and does not influence the lasting safe operation of direct current instrument transformer place circuit units,
Accuracy can also be examined simultaneously.
In order to solve the above-mentioned technical problem, technical solution is used by the utility model：A kind of transformer station direct current system
Punching current transformer, which does not have a power failure, replaces capacity checking device, is made of two switches and two ammeters；The one of first ammeter
Positive direct-current busbar, one end connection first switch are terminated, the other end of first switch connects the negative of the first tested current transformer
Carry end；One end connection second switch of second ammeter, the other end of second switch connect the second tested current transformer
Load end.
A kind of transformer station direct current system punching current transformer of the utility model, which does not have a power failure, replaces capacity checking device, by 2 electricity
Flow table, 4 conducting wires, 2 switches are formed, and equivalent current table branch is as bypass, bringing onto load operation.Conducting wire is connected into direct current first
Busbar；Secondly conducting wire other end is connected into direct current instrument transformer load survey to be replaced and connects ammeter；Last reading evidence, is opened
Begin to replace punching current transformer.
The ammeter, 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 the utility model does not have a power failure the step of replacing capacity checking device such as
Under：
(1) conducting wire connection busbar, terminal 1,2 clamp, securely；
(2) conducting wire connects direct current instrument transformer load-side to be replaced and terminal 3,4, clamps, securely；
(3) reading, correctness, which is checked, to be judged.
The advantageous effect of the utility model compared with the prior art is that a kind of transformer station direct current system of the utility model is worn
Core current transformer, which does not have a power failure, replaces capacity checking device, by using the mode for introducing by-pass current table composition equivalent current mutual inductor
Monitoring current carries out accuracy veritification, according to being changed the disconnection of mutual inductor branch switch, being closed, replaces mutual inductor, and observe and compare
Each branch current relationship, judgment accuracy make up the deficiency that tradition power failure is replaced.
The utility model is suitable for transformer station secondary system operational management skill.
Description of the drawings
Fig. 1 is device wiring diagram.
Fig. 2 is device vertical view.
Specific embodiment
This utility unit wiring diagram is as shown in Figure 1, vertical view composition is as shown in Figure 2.
A kind of transformer station direct current system punching current transformer of the present embodiment, which does not have a power failure, replaces capacity checking device wiring such as Fig. 1 institutes
Show, by dc bus, the first ammeter A1, the second ammeter A2, conducting wire, first switch QK1, second switch QK2 and treat more
Change current transformer loop, load is formed.
Fig. 2 is device vertical view, is opened including the first ammeter A1, the second ammeter A2, conducting wire, first switch QK1, second
Close QK2 and wire connection terminal.
The committed step of the utility model specific implementation：
(1) first ammeter connects positive direct-current busbar, the other end connection first of the first ammeter by terminal 1 through conducting wire
Switch；Second ammeter connects negative dc bus, the other end connection second switch of the second ammeter by terminal 2 through conducting wire；
(2) other end of first switch connects the load-side of the first current transformer to be replaced by terminal 3 through conducting wire；
The other end of second switch connects the load-side of the second current transformer to be replaced by terminal 4 through conducting wire；
(3) correctness is checked.
Wiring is correct, meets before replacing direct current instrument transformer：
In formula,Current Transmit is changed to flow through1Electric current,Current Transmit is changed to flow through2Electric current,
To flow through the electric current of ammeter A1,To flow through the electric current of ammeter A2,It is CT1Branch current initial value,It is
CT2Branch current initial value.
It switchs QK1 to disconnect, meet at this time：
It switchs QK2 to disconnect, meet at this time：
Mutual inductor replacement finishes, and is closed QK1, QK2, and formula (1) is set up.
In conclusion a kind of transformer station direct current system punching current transformer of the utility model does not have a power failure, dress is checked in replacement
It puts, is made of 2 ammeters, 4 conducting wires, 2 switches.Instance analysis is more exchanged with using a DC loop mutual inductor, is verified
Mutual inductor does not have a power failure the accuracy replaced and checked.
Specific embodiment of the present utility model is described above in association with attached drawing, but these explanations cannot be understood to
Limit the scope of the utility model.On the premise of not departing from the spirit and scope of the utility model, the utility model also has
Corresponding changes and improvements, these changes and improvements require to fall into the range of claimed utility model.The utility model
Protection domain by claims, define.
Claims (2)
1. a kind of transformer station direct current system punching current transformer, which does not have a power failure, replaces capacity checking device, which is characterized in that described device
It is made of two switches and two ammeters；One termination positive direct-current busbar of the first ammeter, one end connection first switch, the
The load end of the first current transformer that the other end connection of one switch is tested；One end connection second switch of second ammeter,
The load end of the second current transformer that the other end connection of second switch is tested.
2. a kind of transformer station direct current system punching current transformer according to claim 1, which does not have a power failure, replaces capacity checking device,
It is characterized in that, the ammeter gear is adjustable, DC current measurement is supported.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721652685.3U CN207516534U (en) | 2017-12-01 | 2017-12-01 | A kind of transformer station direct current system punching current transformer, which does not have a power failure, replaces capacity checking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721652685.3U CN207516534U (en) | 2017-12-01 | 2017-12-01 | A kind of transformer station direct current system punching current transformer, which does not have a power failure, replaces capacity checking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207516534U true CN207516534U (en) | 2018-06-19 |
Family
ID=62540975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721652685.3U Expired - Fee Related CN207516534U (en) | 2017-12-01 | 2017-12-01 | A kind of transformer station direct current system punching current transformer, which does not have a power failure, replaces capacity checking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207516534U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181599A (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 check method |
| CN113588993A (en) * | 2021-06-10 | 2021-11-02 | 华能嘉祥发电有限公司 | Device and method for replacing ammeter on line |
-
2017
- 2017-12-01 CN CN201721652685.3U patent/CN207516534U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181599A (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 check method |
| CN113588993A (en) * | 2021-06-10 | 2021-11-02 | 华能嘉祥发电有限公司 | Device and method for replacing ammeter on line |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180619 |