CN110176752A - Switchgear arc light protection method and device - Google Patents
Switchgear arc light protection method and device Download PDFInfo
- Publication number
- CN110176752A CN110176752A CN201910594032.1A CN201910594032A CN110176752A CN 110176752 A CN110176752 A CN 110176752A CN 201910594032 A CN201910594032 A CN 201910594032A CN 110176752 A CN110176752 A CN 110176752A
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- China
- Prior art keywords
- signal
- threshold value
- warning
- switchgear
- arc light
- 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.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
-
- 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
- H02H7/22—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 for distribution gear, e.g. bus-bar systems; for switching devices
Abstract
The embodiment of the present application provides a kind of switchgear arc light protection method and device, and method includes: the arc light that switchgear is acquired by avalanche photodide, and arc light is amplified to and is converted to voltage signal, sends signal processing apparatus for voltage signal；Signal processing apparatus judges whether voltage signal is greater than threshold value of warning and protection threshold value respectively；If voltage signal is greater than threshold value of warning, pre-warning signal is sent to control centre；If voltage signal be greater than threshold value of warning and protection threshold value, send trip signal to switchgear switch；Signal processing apparatus is greater than threshold value of warning and protection threshold value according to voltage signal, sends alarm signal to control centre.The embodiment of the present application is by participating in action logic judgement for threshold value of warning and protection threshold value, and as the barring condition of switchgear breakdown judge, breakdown judge speed is fast, and accuracy is high, improves the safety of switchgear operation.
Description
Technical field
This application involves steel tower technical field more particularly to a kind of arc light protection method and devices.
Background technique
The shelf depreciation that inside switch cabinet occurs, which causes the safe operation of power equipment, to be seriously threatened.Shelf depreciation by
Gradually development is so that apparatus insulated horizontal accelerated deterioration, causes high energy arc under extreme conditions, arc burning cause stress effect,
Incendiary effect, radiation and sound effect will cause copper bar, heating air causes air to expand, and generate immense pressure to switchgear,
It is possible that setting off an explosion, relay protection system used by power department and arc light monitoring system interlink can be good to pole
End electric arc responds, but is difficult to develop electric arc the intermittent electric discharge of early period and effectively monitors and realize early warning, and
And arc protection system generallys use a variety of method comprehensive descision failures.
For the failure of inside switch cabinet, cut off to ultrahigh speed failure be it is most important, since arc light is along with opening
It closes the electric arc that cabinet instant of failure generates to issue, therefore breakdown judge, related skill can be carried out according to the switchgear arc light detected
In art, arc light detecting is carried out using arc light protecting device, can be acted in several milliseconds after detecting arc light, realizes quickly excision event
Barrier.However, external light source interference easily causes false protection, and the accuracy rate for causing arc fault to judge is lower in the above method.
Summary of the invention
This application provides a kind of arc light protection method and devices, and to solve, arc light protecting device accuracy rate is lower to be asked
Topic.
In a first aspect, this application provides a kind of arc light protection methods, this method comprises:
The arc light is amplified and is converted to voltage letter by the arc light that switchgear is acquired by avalanche photodide
Number, signal processing apparatus is sent by the voltage signal；
The signal processing apparatus judges whether the voltage signal is greater than threshold value of warning and protection threshold value respectively；
If the voltage signal is greater than the threshold value of warning, pre-warning signal is sent to control centre；
If the voltage signal is greater than the threshold value of warning and protection threshold value, trip signal is sent to the switchgear
Switch；
The signal processing apparatus is greater than the threshold value of warning and protection threshold value according to the voltage signal, sends alarm signal
Number arrive the control centre.
Optionally, the switchgear arc light protection method further include:
The signal processing apparatus sends the voltage signal to the control centre.
Optionally, the switchgear arc light protection method further include:
The control centre shows the voltage signal.
Second aspect, this application provides a kind of arc light protecting device, which includes: avalanche photodide, signal
Processing unit and host computer, wherein
The avalanche photodide is electrically connected with the signal processing apparatus, and the avalanche photodide is for acquiring
The arc light of switchgear, amplifies and is converted to voltage signal for the arc light, sends signal processing for the voltage signal
Device；
The signal processing apparatus and the upper mechatronics, the signal processing apparatus include data processing unit and
Data communication units, wherein the data processing unit is connect with the data communication units, and the data processing unit is used for
The voltage signal is compared with threshold value of warning and protection threshold value respectively, if the voltage signal is greater than the early warning threshold
Value then sends pre-warning signal to the data communication units, if the voltage signal is greater than the threshold value of warning, and is greater than institute
Protection threshold value is stated, then sends alarm signal to the data communication units, sends switch of the trip signal to switchgear, the number
It is used to send the host computer for the pre-warning signal or alarm signal according to communication unit；
The host computer is for showing the pre-warning signal or alarm signal.
Optionally, the signal processing apparatus includes display unit, and the display unit is for showing the pre-warning signal
Or alarm signal.
Optionally, the signal processing apparatus further include: intake input unit, the intake input unit with it is described
Data processing unit connection, the input quantity of the intake input unit include the threshold value of warning and protection threshold value.
Arc light protection method provided by the present application and the beneficial effect of device include:
Arc light protection method provided by the present application is made by the way that threshold value of warning and protection threshold value are participated in action logic judgement
For the barring condition of breakdown judge, dual judgement is carried out, when the voltage signal for detecting avalanche photodide output is big simultaneously
It is judged as arc fault when threshold value of warning and arc protection threshold value and sends out trip command；When the optical signal detected is merely greater than pre-
When warning threshold value and being less than protection threshold value, only sends out a pre-warning signal and notify operations staff without being judged as arc fault, prevent from only using
Protection misoperation when protecting threshold value as trip criteria, improves the reliability of protection act.Arc protection provided by the present application
Device judges the voltage signal of avalanche photodide output, breakdown judge with threshold value of warning and protection threshold value respectively
Speed is fast, and accuracy is high, improves the safety of switchgear operation, reduces switchgear protection cost.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without any creative labor,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of flow diagram of switchgear arc light protection method provided by the embodiments of the present application；
Fig. 2 is a kind of signal processing logic schematic diagram provided by the embodiments of the present application；
Fig. 3 is a kind of structural schematic diagram of switchgear protective device provided by the embodiments of the present application.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation
Example is only some embodiments of the present application, rather than whole embodiments.Based on the embodiment in the application, the common skill in this field
The application protection all should belong in art personnel every other embodiment obtained without making creative work
Range.
It is a kind of flow diagram of switchgear arc light protection method provided by the embodiments of the present application, such as Fig. 1 referring to Fig. 1
It is shown, switchgear arc light protection method provided by the embodiments of the present application, comprising the following steps:
Step S110: the arc light of switchgear is acquired by avalanche photodide, arc light is amplified and is converted to electricity
Signal is pressed, sends signal processing apparatus for voltage signal.
Avalanche photodide is a kind of semiconductor diode with high-gain, usually works under high-V alloy, sharp
Amplify photoelectric current with the ionization by collision of its device inside and avalanche multiplication.Avalanche multiplication is a kind of machine of impact several times ionization
System.After the photo-generated carrier in PN junction generates, if depletion layer has sufficiently large electric field, then the photo-generated carrier in this layer
Just have a sufficiently large energy.The energy of photo-generated carrier collides the valence electron of constraint enough, and valence electron produces after being collided
Raw electron-hole pair.Same electron-hole pair has sufficiently large energy again under electric field action and goes to collide next valence electricity
Son.It collides repeatedly, will realize that multiplier effect is also referred to as avalanche multiplication, can be used for carrying out the detection of atomic dim light.This Shen
Avalanche photodide please be placed in switchgear in embodiment, can detect switchgear and develop the electric discharge of intermittence early period and electric arc
Optical signal caused by burning, amplifies to by optical signal, and then exports higher voltage signal and be transmitted to signal processing device
It sets.
Step S120: signal processing apparatus judges whether voltage signal is greater than threshold value of warning and protection threshold value respectively.
Voltage signal is compared with threshold value of warning and protection threshold value by signal processing apparatus respectively simultaneously, which is simultaneously
Row treatment process, treatment effeciency is high, is conducive to carry out early warning and tripping, alarm etc. in time, improves safety.
Step S130: if voltage signal is greater than threshold value of warning, pre-warning signal is sent to control centre.
Threshold value of warning is pre-set voltage value, when the voltage signal obtained according to avalanche photodide is greater than early warning
When threshold value, then determines that the intermittent shelf depreciation of electric arc early period only occurs for switchgear, electric arc is not developed into, at this point, signal processing
Device sends pre-warning signal to control centre, does not trip.
Step S140: if voltage signal is greater than threshold value of warning and protection threshold value, trip signal is sent to switchgear
Switch.
Threshold value, that is, arc protection threshold value is protected, is pre-set voltage value, protection threshold value is greater than threshold value of warning.The application
In embodiment, when the voltage signal obtained according to avalanche photodide is greater than threshold value of warning and protection threshold value, then determine to open
The shelf depreciation for closing cabinet hair has developed into electric arc, and switchgear breaks down, at this point, signal processing apparatus sends tripping letter at once
Number arrive switchgear switch.After the switch of switchgear receives trip signal, trip operation is carried out, avoids switchgear failure into one
Step expands.
Step S150: signal processing apparatus is greater than threshold value of warning and protection threshold value according to voltage signal, sends alarm signal
To control centre.
When the voltage signal obtained according to avalanche photodide is greater than threshold value of warning and protection threshold value, control switch cabinet
After tripping, it is also necessary to send alarm signal to control centre, the staff of control centre is reminded to carry out event to switchgear in time
Barrier processing.
In the embodiment of the present application, step S120-S150 is executed by signal processing apparatus, and signal processing apparatus includes at signal
Logic circuit is managed, after voltage signal is transferred to signal processing logic circuit, is handled by signal processing logic circuit, at signal
The processing logic for managing logic circuit is a kind of signal processing logic schematic diagram provided by the embodiments of the present application, such as Fig. 2 referring to fig. 2
It is shown, when input signal is greater than threshold value of warning, pre-warning signal output is carried out, is greater than threshold value of warning when input signal meets simultaneously
When with protection threshold value, trip signal output is carried out, wherein input signal is the voltage signal that avalanche photodide is sent.
Further, switchgear arc light protection method provided by the embodiments of the present application, further includes: signal processing apparatus is sent
Voltage signal is to control centre；Control centre shows voltage signal.The two steps are for the operation to switchgear
Situation carries out real-time monitoring, is conducive to carry out subsequent analysis processing to the operating condition of switchgear.
The embodiment of the present application also provides a kind of switchgear arc light protecting devices, for realizing above-mentioned switchgear arc protection
Each step of method is a kind of structural schematic diagram of switchgear protective device provided by the embodiments of the present application, such as Fig. 3 referring to Fig. 3
It is shown, switchgear protective device provided by the embodiments of the present application, including avalanche photodide, signal processing apparatus and upper
Machine.
Avalanche photodide is arranged in switchgear, and avalanche photodide is electrically connected with signal processing apparatus, snowslide
Photodiode is used to acquire the arc light of switchgear, and arc light is amplified to and is converted to voltage signal, voltage signal is sent
To signal processing apparatus.
Signal processing apparatus and upper mechatronics, signal processing apparatus includes display unit, intake input unit, number
According to processing unit and data communication units, wherein intake input unit is connect with data processing unit, intake input unit
Input quantity include threshold value of warning and protection threshold value.Data processing unit is connect with data communication units, and data processing unit is used
In voltage signal to be compared with threshold value of warning and protection threshold value respectively, if voltage signal is greater than threshold value of warning, send
Pre-warning signal is to data communication units, if voltage signal is greater than threshold value of warning, and is greater than protection threshold value, then sends alarm signal
To data communication units, the switch of transmission trip signal to switchgear, data communication units are used for pre-warning signal or alarm signal
Number it is sent to host computer, data communication units include wire communication module or wireless communication module；Display unit is pre- for showing
Alert signal or alarm signal；Control centre is provided with host computer, host computer is for showing pre-warning signal or alarm signal
Show.
As seen from the above-described embodiment, the embodiment of the present application is by acting the threshold value of warning and the participation of arc protection threshold value
Logic judgment carries out dual judgement as the barring condition of breakdown judge, when the voltage for detecting avalanche photodide output
Signal is judged as arc fault and sends out trip command when being simultaneously greater than threshold value of warning and arc protection threshold value；When the light letter detected
When number being merely greater than threshold value of warning and be less than protection threshold value, only send out a pre-warning signal notify operations staff without being judged as arc light therefore
Barrier, protection misoperation when preventing from only using arc protection threshold value as trip criteria, improves the reliability of protection act.The application
Embodiment without acquisition current signal, arc fault is judged according to the variation of current signal, reduce switchgear protection at
This.
Since embodiment of above is that reference combination is illustrated on other modes, have between different embodiments
There is identical part, identical, similar part may refer to each other between each embodiment in this specification.Herein no longer in detail
It illustrates.
It should be noted that in the present specification, the relational terms of such as " first " and " second " or the like are used merely to
It distinguishes one entity or operation from another entity or operation, and not necessarily requires or imply these entities or operation
Between there are any this actual relationship or sequences.Moreover, the terms "include", "comprise" or its any other variant are intended to
Cover non-exclusive inclusion, so that the circuit structure, article or the equipment that include a series of elements not only include those
Element, but also including other elements that are not explicitly listed, or further include for this circuit structure, article or equipment
Intrinsic element.In the absence of more restrictions, the element for thering is sentence "including a ..." to limit, it is not excluded that
There is also other identical elements in circuit structure, article or equipment including the element.
Those skilled in the art will readily occur to its of the application after considering specification and practicing the disclosure invented here
His embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows the general principle of the application and including the undocumented common knowledge in the art of the application
Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the application are wanted by right
The content asked is pointed out.
Above-described the application embodiment does not constitute the restriction to the application protection scope.
Claims (6)
1. a kind of switchgear arc light protection method characterized by comprising
The arc light that switchgear is acquired by avalanche photodide, amplifies and is converted to voltage signal for the arc light, will
The voltage signal is sent to signal processing apparatus；
The signal processing apparatus judges whether the voltage signal is greater than threshold value of warning and protection threshold value respectively；
If the voltage signal is greater than the threshold value of warning, pre-warning signal is sent to control centre；
If the voltage signal is greater than the threshold value of warning and protection threshold value, trip signal opening to the switchgear is sent
It closes；
The signal processing apparatus according to the voltage signal be greater than the threshold value of warning and protection threshold value, send alarm signal to
The control centre.
2. switchgear arc light protection method as described in claim 1, which is characterized in that the switchgear arc light protection method is also
Include:
The signal processing apparatus sends the voltage signal to the control centre.
3. switchgear arc light protection method as claimed in claim 2, which is characterized in that the switchgear arc light protection method is also
Include:
The control centre shows the voltage signal.
4. a kind of switchgear arc light protecting device characterized by comprising avalanche photodide, signal processing apparatus and on
Position machine, wherein
The avalanche photodide is electrically connected with the signal processing apparatus, and the avalanche photodide is for acquiring switch
The arc light of cabinet, amplifies and is converted to voltage signal for the arc light, sends signal processing apparatus for the voltage signal；
The signal processing apparatus and the upper mechatronics, the signal processing apparatus includes data processing unit and data
Communication unit, wherein the data processing unit is connect with the data communication units, and the data processing unit is used for institute
Voltage signal is stated to be compared with threshold value of warning and protection threshold value respectively, if the voltage signal is greater than the threshold value of warning,
Pre-warning signal is then sent to the data communication units, if the voltage signal is greater than the threshold value of warning, and is greater than described
Threshold value is protected, then sends alarm signal to the data communication units, sends switch of the trip signal to switchgear, the data
Communication unit is used to send the host computer for the pre-warning signal or alarm signal；
The host computer is for showing the pre-warning signal or alarm signal.
5. switchgear arc light protecting device as claimed in claim 4, which is characterized in that the signal processing apparatus includes display
Unit, the display unit is for showing the pre-warning signal or alarm signal.
6. switchgear arc light protecting device as claimed in claim 4, which is characterized in that the signal processing apparatus further include:
Intake input unit, the intake input unit are connect with the data processing unit, the intake input unit
Input quantity includes the threshold value of warning and protection threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910594032.1A CN110176752A (en) | 2019-07-03 | 2019-07-03 | Switchgear arc light protection method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910594032.1A CN110176752A (en) | 2019-07-03 | 2019-07-03 | Switchgear arc light protection method and device |
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| Publication Number | Publication Date |
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| CN110176752A true CN110176752A (en) | 2019-08-27 |
Family
ID=67699761
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910594032.1A Pending CN110176752A (en) | 2019-07-03 | 2019-07-03 | Switchgear arc light protection method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110794326A (en) * | 2019-09-26 | 2020-02-14 | 昆明理工大学 | Line selection method, device and system for short-circuit protection of power distribution system |
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| US20180145496A1 (en) * | 2016-11-18 | 2018-05-24 | Schweitzer Engineering Laboratories, Inc. | Methods and systems for evaluating arc flash exposure hazard |
| CN109038511A (en) * | 2018-07-30 | 2018-12-18 | 国网山东省电力公司德州供电公司 | High-voltage board cable bin guard system and method based on photo-thermal early warning and arc transfer |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101303840B1 (en) * | 2013-07-10 | 2013-09-04 | 주식회사 케이디파워 | Arc flash energy calculation method for arc flash detection and cutoff |
| US20180145496A1 (en) * | 2016-11-18 | 2018-05-24 | Schweitzer Engineering Laboratories, Inc. | Methods and systems for evaluating arc flash exposure hazard |
| CN107831414A (en) * | 2017-10-13 | 2018-03-23 | 国网河南省电力公司濮阳供电公司 | A kind of Ultraviolet Detector for being used to detect power transmission and transforming equipment paradoxical discharge |
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| CN110794326A (en) * | 2019-09-26 | 2020-02-14 | 昆明理工大学 | Line selection method, device and system for short-circuit protection of power distribution system |
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Application publication date: 20190827 |