CN207069564U - A kind of arc protection accelerates transformer to press off lock Over Current Protection System again - Google Patents
A kind of arc protection accelerates transformer to press off lock Over Current Protection System again Download PDFInfo
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- CN207069564U CN207069564U CN201720629837.1U CN201720629837U CN207069564U CN 207069564 U CN207069564 U CN 207069564U CN 201720629837 U CN201720629837 U CN 201720629837U CN 207069564 U CN207069564 U CN 207069564U
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- 230000009471 action Effects 0.000 description 2
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Abstract
The utility model discloses a kind of arc protection to accelerate transformer to press off lock Over Current Protection System, including setting valve input circuit, conversion decoding circuit, arc protection signal input circuit, processor and output circuit again；The output end of setting valve input circuit, conversion decoding circuit and arc protection signal input circuit is connected with the input of processor, the input connection of processor output end and output circuit, the output circuit output end output protection amount of outputing.The utility model can effectively reduce presses off lock current protection actuation time again, reduces short-circuit impact suffered by transformer under this malfunction, reduces infringement of the short trouble to transformer.
Description
Technical field
The utility model is related to a kind of arc protection accelerates transformer to press off lock Over Current Protection System again, belongs to transformer guarantor
Protect technical field.
Background technology
Transformer is the key equipment of power network, carry voltage of transformation, transmit electric energy vital task, be in transformer station not
The assets can or lack, to involve great expense.When transformer in transformer station breaks down or damaged, the part that gently then causes damage is negative
Lotus, spare transformer bear heavy service, increase equipment loss and depreciation, heavy then whole transformer station is paralysed can not run.
Particularly with 220kV and the transformer of above, because equipment volume is huge, transport inconvenience so that transformer overhaul
It is longer with the cycle of replacing, once huge economic losses can be caused by breaking down or damaging.
Rush of current caused by mesolow side bus short circuit is one of the main reason for causing transformer to damage.Due to short circuit
Point is nearer apart from transformer, the huge electric power that enormous impact current strap caused by mesolow side bus short circuit is come, Ke Nengzao
Into deformation of transformer winding, so as to cause transformer damage.Arc protection is the novel protected system for developing application rapidly in recent years
System, it is mainly used in the protection of mesolow side bus, can be according to arc optical signal after arc short-circuit failure occurs for central low-pressure side bus
And electric current criterion cuts off rapidly middle voltage bus bar side failure, transformer is protected.
Mesolow side bus failure needs the breaker by this side to be cut off, when this side breaker breaks down and can not cut
During except failure, transformer can only be leaned on to press off lock overcurrent protection again and started, hair trip signal makes the high, breaker actuation of medium voltage side,
Each side switch of tripping transformer, cuts off failure.However, transformer negative pressure locking overcurrent protection at present is protected as transformer backup
Shield configures three-stage protection, every section of time limit, it is necessary to coordinate with the excessively stream three section protection of outlet, during actual disposition.First
Section protection act jumps this side section switch, and second segment protection act jumps this side breaker, and each side of three section protection action jump is broken
Road device.Its first paragraph operating time of protection should be greater than the maximum duration of all mesolow sides outlet protection, the protection of second, third section
Increase time limit Δ t (typically taking 0.3s~0.5s) between every section.What its first, second section protection signal was sent with arc protection
Signal repeats, and in this case, first, second section of relaying configuration has no meaning, and extends the 3rd section of each side breaker and jump
That opens protection signal sends the time, transformer is born the impact of long period high current, may aggravate the impaired journey of transformer
Degree.In addition, generally press off again lock overcurrent protection be with three section protection coordinate, its time limit setting in 1.5s or so, if
Increase by first, second section protection time limit, it is possible to more than " transformer external short circuit failure, short circuit current be more than either side around
2s " requirement is not to be exceeded in group heat-stable current, transformer overcurrent protection actuation time.
In a word, existing configuration arc protection and the transformer for locking overcurrent protection is pressed off again, in mesolow side circuit breaker failure,
When can not normally trip, existing protection system excision fault time is longer, it is difficult to meet the requirement of tranformer protection actuation time,
Transformer can not be played a very good protection.
Utility model content
In order to solve the above-mentioned technical problem, the utility model provides a kind of arc protection acceleration transformer and pressed off again and locked
Flow protection system.
In order to achieve the above object, technical scheme is used by the utility model：
A kind of arc protection accelerates transformer to press off lock Over Current Protection System, including setting valve input circuit, conversion solution again
Code circuit, arc protection signal input circuit, processor and output circuit；
Input input low pressure setting valve, overcurrent protection setting valve, the arc light protecting system of the setting valve input circuit
Actuation time tArc, transformer press off lock excessively stream first paragraph protection time limit setting value t againI, transformer press off lock excessively stream the again and
Section protection time limit setting value tII, transformer press off lock excessively stream three section protection time limit setting value t againIIIAnd breaker fail protection
Time limit setting value tX, input input transformer primary voltage signal, the transformer primary current letter of the conversion decoding circuit
Number and on-off model, the external arc light protecting system of arc protection signal input circuit input, input arc protection letter
Number, the output end of the setting valve input circuit, conversion decoding circuit and arc protection signal input circuit is and processor
Input connection, the input of the processor output end and output circuit connected, and the output circuit output end output is protected
Protect the amount of outputing.
Conversion decoding circuit includes the first photoelectric switching circuit and decoding circuit；The input of first photoelectric switching circuit
Hold input transformer primary voltage signal, transformer primary current signal and on-off model, first photoelectric switching circuit
Output end and the input of decoding circuit connect, the decoding circuit is once electric by transformer primary voltage signal, transformer
Data in stream signal and on-off model extract, and the output end of the decoding circuit and the input of processor connect.
The arc protection, which accelerates transformer to press off lock Over Current Protection System again, also includes display screen, the display screen and place
Manage the output end connection of device.
The arc protection, which accelerates transformer to press off lock Over Current Protection System again, also includes power module, the power module
Powered for each part.
Arc protection signal input circuit includes arc protection signal input port and the second photoelectric switching circuit, passes through arc
Light protection signal input port accesses arc protection signal, and arc protection signal inputs after being changed by the second photoelectric switching circuit
Processor.
Setting valve input circuit is setting valve input port.
The beneficial effect that the utility model is reached：1st, the utility model is opened using digital transformer substation digital data transmission
Pass is measured and the convenient advantage of quantity of state, and switching value and arc protection signal are introduced into criterion, can more be directed to mesolow side bus
Generation short trouble, and the failure of transformer mesolow side breaker failure, improve relay protective scheme, acceleration protection operation time limit；
2nd, the utility model can effectively reduce presses off lock current protection actuation time again, reduces short suffered by transformer under this malfunction
Road is impacted, and reduces infringement of the short trouble to transformer.
Brief description of the drawings
Fig. 1 is the structured flowchart of system；
Fig. 2 is photoelectric switching circuit figure；
Fig. 3 is the schematic diagram of system protection method；
Fig. 4 is output timing diagram.
Embodiment
The utility model is further described below in conjunction with the accompanying drawings.Following examples are only used for clearly illustrating this
The technical scheme of utility model, and the scope of protection of the utility model can not be limited with this.
As shown in figure 1, a kind of arc protection accelerates transformer to press off lock Over Current Protection System, including setting valve input electricity again
Road, conversion decoding circuit, arc protection signal input circuit, display screen, power module, processor and output circuit.
The input input low pressure setting valve of setting valve input circuit, overcurrent protection setting valve, arc light protecting system it is dynamic
Make time tArc, transformer press off lock excessively stream first paragraph protection time limit setting value t againI, transformer presses off lock excessively stream the again and section is protected
Protect time limit setting value tII, transformer press off lock excessively stream three section protection time limit setting value t againIIIWith the breaker fail protection time limit
Setting valve tX, change input input transformer primary voltage signal, transformer primary current signal and the switch of decoding circuit
Signal is measured, the external arc light protecting system of arc protection signal input circuit input, inputs arc protection signal, setting valve input
The output end of circuit, conversion decoding circuit and arc protection signal input circuit is connected with the input of processor, is handled
Input of the device output end respectively with display screen and output circuit is connected, the output circuit output end output protection amount of outputing, power supply
Module is powered for each part.
Conversion decoding circuit includes the first photoelectric switching circuit and decoding circuit；The input of first photoelectric switching circuit is defeated
Enter transformer primary voltage signal, transformer primary current signal and on-off model, the output end of the first photoelectric switching circuit
It is connected with the input of decoding circuit, decoding circuit is by transformer primary voltage signal, transformer primary current signal and switch
Data in amount signal extract, and the output end of decoding circuit and the input of processor connect.
Arc protection signal input circuit includes arc protection signal input port and the second photoelectric switching circuit, passes through arc
Light protection signal input port accesses arc protection signal, and arc protection signal inputs after being changed by the second photoelectric switching circuit
Processor.
Wherein, the first photoelectric switching circuit and the second photoelectric switching circuit structure are consistent, specifically as shown in Fig. 2 its function
By optical signal converted electrical number, to be exported by pulse.Setting valve input circuit is setting valve input port.Decoding circuit is existing
Some circuits, are not described in detail here.Output circuit is also existing circuit, and particular circuit configurations are not described, will located in detail
Protection signal output protection output amount of the device according to obtained by relay protective scheme is managed, output signal is corresponding：0-be failure to actuate；1-jump
Section switch；2-jump this side breaker；3-jump each side breaker, and put into operation pressing plate control by tripping operation.
As shown in Figures 3 and 4, the guard method of system is specific as follows：Detect that short trouble occurs for mesolow side bus, and
During transformer mesolow side breaker failure, external arc light protecting system starts arc protection, and arc protection accelerates transformer
Lock Over Current Protection System is pressed off again and receives arc protection signal, in the period [0, tArc] export and jump section switch and jump this
The protection signal of side breaker；In tArcAfter moment, if judging section switch or the open circuit of this side according to on-off model
Device is in " combined floodgate " state, i.e. failure is not cut off, then starting transformer compound voltage lockout overcurrent protection, in tI、tIIAnd tIIIWhen
Output respectively is carved to jump section switch, jump this side breaker and jump the protection signal of each side breaker；Receiving arc protection
Signal and through breaker fail protection time limit tXAfterwards, if judging section switch or this side breaker according to on-off model
In " combined floodgate " state, then transformer compound voltage lockout overcurrent protection is exited, start arc protection and accelerate transformer to press off again
Overcurrent protection is locked, in tIVThe protection signal of each side breaker, t are jumped in moment outputIV=tX+tArc, tI＜ tIV＜ tII。
The utility model will be switched using digital transformer substation digital data transmission switching value and the convenient advantage of quantity of state
Amount and arc protection signal introduce criterion, short trouble, and transformer mesolow side more can occur for mesolow side bus
The failure of breaker failure, improve relay protective scheme, when acceleration protection operation time limit, effectively reduction press off lock current protection action again
Between, short-circuit impact suffered by transformer under this malfunction is reduced, reduces infringement of the short trouble to transformer.
Described above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model technical principle is not departed from, some improvement and deformation can also be made, these change
Enter and deform and also should be regarded as the scope of protection of the utility model.
Claims (6)
1. a kind of arc protection accelerates transformer to press off lock Over Current Protection System again, it is characterised in that：Electricity is inputted including setting valve
Road, conversion decoding circuit, arc protection signal input circuit, processor and output circuit；
The input input low pressure setting valve of the setting valve input circuit, overcurrent protection setting valve, arc light protecting system it is dynamic
Make time tArc, transformer press off lock excessively stream first paragraph protection time limit setting value t againI, transformer presses off lock excessively stream the again and section is protected
Protect time limit setting value tII, transformer press off lock excessively stream three section protection time limit setting value t againIIIWith the breaker fail protection time limit
Setting valve tX, the conversion input input transformer primary voltage signal of decoding circuit, transformer primary current signal and
On-off model, the external arc light protecting system of arc protection signal input circuit input, input arc protection signal, institute
State input of the output end of setting valve input circuit, conversion decoding circuit and arc protection signal input circuit with processor
The input of end connection, the processor output end and output circuit is connected, and the output circuit output end output protection is outputed
Amount.
2. a kind of arc protection according to claim 1 accelerates transformer to press off lock Over Current Protection System again, its feature exists
In：Conversion decoding circuit includes the first photoelectric switching circuit and decoding circuit；The input of first photoelectric switching circuit is defeated
Enter transformer primary voltage signal, transformer primary current signal and on-off model, first photoelectric switching circuit it is defeated
Go out end to be connected with the input of decoding circuit, the decoding circuit believes transformer primary voltage signal, transformer primary current
Number and on-off model in data extract, the input of the output end of the decoding circuit and processor connects.
3. a kind of arc protection according to claim 1 accelerates transformer to press off lock Over Current Protection System again, its feature exists
In：The arc protection, which accelerates transformer to press off lock Over Current Protection System again, also includes display screen, the display screen and processor
Output end connection.
4. a kind of arc protection according to claim 1 accelerates transformer to press off lock Over Current Protection System again, its feature exists
In：The arc protection, which accelerates transformer to press off lock Over Current Protection System again, also includes power module, and the power module is each
Part is powered.
5. a kind of arc protection according to claim 1 accelerates transformer to press off lock Over Current Protection System again, its feature exists
In：Arc protection signal input circuit includes arc protection signal input port and the second photoelectric switching circuit, is protected by arc light
Protect signal input port access arc protection signal, input processing after arc protection signal is changed by the second photoelectric switching circuit
Device.
6. a kind of arc protection according to claim 1 accelerates transformer to press off lock Over Current Protection System again, its feature exists
In：Setting valve input circuit is setting valve input port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720629837.1U CN207069564U (en) | 2017-06-01 | 2017-06-01 | A kind of arc protection accelerates transformer to press off lock Over Current Protection System again |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720629837.1U CN207069564U (en) | 2017-06-01 | 2017-06-01 | A kind of arc protection accelerates transformer to press off lock Over Current Protection System again |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207069564U true CN207069564U (en) | 2018-03-02 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720629837.1U Withdrawn - After Issue CN207069564U (en) | 2017-06-01 | 2017-06-01 | A kind of arc protection accelerates transformer to press off lock Over Current Protection System again |
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| Country | Link |
|---|---|
| CN (1) | CN207069564U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107086543A (en) * | 2017-06-01 | 2017-08-22 | 国网江苏省电力公司检修分公司 | A kind of arc protection accelerates transformer to press off lock Over Current Protection System and method again |
| CN112816917A (en) * | 2021-04-16 | 2021-05-18 | 成都工百利自动化设备有限公司 | Transformer impact monitoring device |
-
2017
- 2017-06-01 CN CN201720629837.1U patent/CN207069564U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107086543A (en) * | 2017-06-01 | 2017-08-22 | 国网江苏省电力公司检修分公司 | A kind of arc protection accelerates transformer to press off lock Over Current Protection System and method again |
| CN107086543B (en) * | 2017-06-01 | 2019-08-23 | 国网江苏省电力有限公司检修分公司 | A kind of arc protection accelerates transformer to press off lock Over Current Protection System and method again |
| CN112816917A (en) * | 2021-04-16 | 2021-05-18 | 成都工百利自动化设备有限公司 | Transformer impact monitoring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180302 Effective date of abandoning: 20190823 |
|
| AV01 | Patent right actively abandoned |