CN105870880A - Intelligent protection system for secondary open circuit of current transformer - Google Patents
Intelligent protection system for secondary open circuit of current transformer Download PDFInfo
- Publication number
- CN105870880A CN105870880A CN201610183557.2A CN201610183557A CN105870880A CN 105870880 A CN105870880 A CN 105870880A CN 201610183557 A CN201610183557 A CN 201610183557A CN 105870880 A CN105870880 A CN 105870880A
- Authority
- CN
- China
- Prior art keywords
- module
- data
- terminal block
- current transformer
- relay switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004891 communication Methods 0.000 claims abstract description 8
- 238000012544 monitoring process Methods 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 230000011664 signaling Effects 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000004804 winding Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
Abstract
The invention relates to an intelligent protection system for a secondary open circuit of a current transformer. The system comprises a CT (current transformer) secondary loop terminal board, wherein a CT loop terminal board relay switch is mounted on the CT secondary loop terminal board; the output side of the relay switch is connected with a collection module; the output of the collection module is connected with an A/D conversion module; the A/D conversion module is connected with a data judgment processing module; the data judgment processing module is provided with an output threshold value of the CT secondary loop terminal board; when a received signal is greater than the threshold value, the data judgment processing module sends out a trigger signal to a relay switch coil to enable the relay to be closed; and meanwhile, the data judgment processing module is connected with a data communication module and used for sending the received data to a background monitoring computer. By adoption of the intelligent protection system, when the CT secondary open circuit suffers from a high voltage, the CT secondary loop can be closed to eliminate the risk of burning down a winding by an overheated iron core so as to eliminate the threat from the secondary side high voltage.
Description
Technical field
The invention belongs to current transformer technical field of relay protection in power system, particularly a kind of Current Transformer Secondary open circuit
Intelligent protection system.
Background technology
In power system, once open a way in Current Transformer Secondary side, is equivalent to booster transformer and is in no-load running state, and one
The secondary side all exciting currents of electric current, make magnetic flux density in iron core substantially become big.On the one hand iron loss is made to sharply increase, iron core mistake
Heat even burns out winding；On the other hand, secondary side induces the highest voltage, may puncture insulation, seriously jeopardizes the person and sets
Standby safety.
Summary of the invention
It is an object of the invention to for the deficiencies in the prior art, and propose a kind of Current Transformer Secondary open circuit intelligent protection system.
The present invention solves it and technical problem is that and take techniques below scheme to realize:
A kind of Current Transformer Secondary open circuit intelligent protection system, this system includes secondary loop of mutual inductor terminal block, at electricity
Secondary loop of mutual inductor terminal block relay switch, defeated at relay switch are installed in current transformer secondary circuit terminal block
Going out side and connect terminal block on off state acquisition module, the output of terminal block on off state acquisition module is connected with A/D modular converter,
Collection signal is converted into digital signal, and A/D modular converter is connected with data judging treatmenting module, by the data signal after conversion
It is sent to data judging treatmenting module, data judging treatmenting module arranges secondary loop of mutual inductor terminal block output threshold values,
When the signal that data judging treatmenting module receives is more than threshold values, data judging treatmenting module sends to touch and signals to be attached thereto
Relay switch coil, relay switch coil energization makes secondary loop of mutual inductor terminal block relay switch adhesive, with
Time, data judging treatmenting module is connected with data communication module, the data signal received constantly is sent out by data communication module
Give background monitoring computer.
And, described data judging treatmenting module specifically uses single-chip microcomputer, A/D modular converter by I/O interface and single-chip microcomputer it
Between carry out data transmission.
And, described data communication module specifically uses GPRS transmission module.
Advantages of the present invention and good effect be:
1, the present invention can close CT secondary circuit when detecting that Current Transformer Secondary open circuit produces high voltage, and send
Warning signal, teletransmission is to backstage simultaneously, gives regulation and control personnel and reminds, in order to process in time, can automatically answer after high voltage disappears
Return or hand resetting..
2, the application of the present invention eliminates the overheated risk burning out winding of iron core, eliminates secondary side sensing high electrical breakdown exhausted simultaneously
The possibility of edge, it is to avoid the person and the catastrophic effect of equipment.
Accompanying drawing explanation
Fig. 1 is the structural representation of present system.
Detailed description of the invention
Implementing to be further described to the present invention below, following example are illustrative, are not determinate, it is impossible to this
Limit protection scope of the present invention.
A kind of Current Transformer Secondary open circuit intelligent protection system, as it is shown in figure 1, this system includes current transformer (CT) two
Minor loop terminal block, the innovative point of the present invention is, installs current transformer (CT) in secondary loop of mutual inductor terminal block
Secondary circuit terminal block relay switch, the outlet side at relay switch connects terminal block on off state acquisition module, terminal block
The output of on off state acquisition module is connected with A/D modular converter, and collection signal is converted into digital signal, A/D modular converter
It is connected with data judging treatmenting module, the data signal after conversion is sent to data judging treatmenting module, processes in data judgement
Being provided with secondary loop of mutual inductor terminal block output threshold values in module, the signal received when data judging treatmenting module is more than
After threshold values, data judging treatmenting module sends and touches the relay switch coil signaling to be attached thereto, and relay switch coil adds
Electricity makes the terminal block relay switch adhesive of current transformer (CT) secondary circuit, and meanwhile, data judging treatmenting module leads to data
Letter module connects, and by data communication module, the data signal received constantly is sent to background monitoring computer, and monitoring calculates
The machine voltage waveform by datagraphic monitor current transformer secondary circuit terminal block outlet side constantly, in order to maintainer
Judge whether to go to maintenance.
In being embodied as of the present invention, described data judging treatmenting module specifically uses single-chip microcomputer to complete, and A/D modular converter leads to
Cross and between I/O interface and single-chip microcomputer, carry out data transmission.
In being embodied as of the present invention, described data communication module specifically uses GPRS transmission module.
Claims (3)
1. a Current Transformer Secondary open circuit intelligent protection system, this system includes secondary loop of mutual inductor terminal block, its
It is characterised by: secondary loop of mutual inductor terminal block relay switch is installed in secondary loop of mutual inductor terminal block,
The outlet side of relay switch connects terminal block on off state acquisition module, the output of terminal block on off state acquisition module and A/D
Modular converter connects, and collection signal is converted into digital signal, and A/D modular converter is connected with data judging treatmenting module, will turn
Data signal after changing is sent to data judging treatmenting module, arranges secondary loop of mutual inductor in data judging treatmenting module
Terminal block output threshold values, when the signal that data judging treatmenting module receives is more than threshold values, data judging treatmenting module sends tactile
Signaling to the relay switch coil being attached thereto, relay switch coil energization makes secondary loop of mutual inductor terminal block continue
Electric switch adhesive, meanwhile, data judging treatmenting module is connected with data communication module, the data signal received constantly is led to
Cross data communication module and be sent to background monitoring computer.
Current Transformer Secondary the most according to claim 1 open circuit intelligent protection system, it is characterised in that: described data are sentenced
Disconnected processing module specifically uses single-chip microcomputer, and A/D modular converter is by carrying out data transmission between I/O interface and single-chip microcomputer.
Current Transformer Secondary the most according to claim 1 open circuit intelligent protection system, it is characterised in that: described data are led to
Letter module specifically uses GPRS transmission module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610183557.2A CN105870880A (en) | 2016-03-28 | 2016-03-28 | Intelligent protection system for secondary open circuit of current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610183557.2A CN105870880A (en) | 2016-03-28 | 2016-03-28 | Intelligent protection system for secondary open circuit of current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105870880A true CN105870880A (en) | 2016-08-17 |
Family
ID=56625173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610183557.2A Pending CN105870880A (en) | 2016-03-28 | 2016-03-28 | Intelligent protection system for secondary open circuit of current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105870880A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877285A (en) * | 2017-03-24 | 2017-06-20 | 山东中实易通集团有限公司 | The station-service subsidiary engine CT thread-breakage protectings and relay system of differential protection are not configured |
| CN107315157A (en) * | 2017-08-04 | 2017-11-03 | 国网江苏省电力公司无锡供电公司 | A kind of current transformer circuit supervision fail alarm detector and current transformer device |
| CN112005122A (en) * | 2018-05-18 | 2020-11-27 | 株式会社电装 | Current sensor |
-
2016
- 2016-03-28 CN CN201610183557.2A patent/CN105870880A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877285A (en) * | 2017-03-24 | 2017-06-20 | 山东中实易通集团有限公司 | The station-service subsidiary engine CT thread-breakage protectings and relay system of differential protection are not configured |
| CN106877285B (en) * | 2017-03-24 | 2018-10-02 | 山东中实易通集团有限公司 | The station-service subsidiary engine CT thread-breakage protectings and relay system of differential protection is not configured |
| CN107315157A (en) * | 2017-08-04 | 2017-11-03 | 国网江苏省电力公司无锡供电公司 | A kind of current transformer circuit supervision fail alarm detector and current transformer device |
| CN112005122A (en) * | 2018-05-18 | 2020-11-27 | 株式会社电装 | Current sensor |
| CN112005122B (en) * | 2018-05-18 | 2023-08-01 | 株式会社电装 | Current sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160817 |