CN107884662A - A kind of electric wiring short circuit Forecasting Methodology - Google Patents
A kind of electric wiring short circuit Forecasting Methodology Download PDFInfo
- Publication number
- CN107884662A CN107884662A CN201710977371.9A CN201710977371A CN107884662A CN 107884662 A CN107884662 A CN 107884662A CN 201710977371 A CN201710977371 A CN 201710977371A CN 107884662 A CN107884662 A CN 107884662A
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- CN
- China
- Prior art keywords
- electric wiring
- short circuit
- controller
- forecasting methodology
- current value
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Alarm Systems (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Emergency Alarm Devices (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of electric wiring short circuit Forecasting Methodology, the electric wiring short circuit Forecasting Methodology comprises the following steps：A, the current value S on electric wiring L lines is monitored by current sensor and controller in real time, monitoring frequency is 3000 times per second；B, the derivative V and second dervative a per microsecond current variation value are calculated by controller；C, current value S and default maximum current value I are compared by controller, if S >=I, and V >=30A/ μ s, and a >=5A/ μ s/ μ s then judge that short circuit will occur for electric wiring；D, if it is determined that short circuit will occur for electric wiring, then relay is disconnected by controller, carries out power-off protection.A kind of electric wiring short circuit Forecasting Methodology of the present invention can predict the generation of short-circuit conditions in time and carry out power-off protection by monitoring the current conditions on electric wiring L lines in real time, it is possible to prevente effectively from the electrically generation of disaster, ensure the property and life security of people.
Description
Technical field
The present invention relates to a kind of Electrical Safety monitoring method, more particularly to a kind of electric wiring short circuit Forecasting Methodology.
Background technology
Short circuit is one of main reason of electrical fire, usually causes huge property loss and personal injury to people.
And existing electrical control gear, such as air switch, electrothermal relay protection switch etc., all it is situation about being had occurred and that in short circuit
Under, passively take measures, although can play a protective role to a certain extent, can not fundamentally prevent the generation of short circuit,
This still constantly can be obtained by evidence from electrical safety accident, therefore timely, effective prediction is carried out to it and is prevented
Control is just particularly necessary.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of electric wiring short circuit Forecasting Methodology, and it can be by monitoring electricity
Gas line current situation, the generation of prediction short circuit in time, in order to avoid losing.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme that：
A kind of electric wiring short circuit Forecasting Methodology, comprises the following steps：A, electricity is monitored by current sensor and controller in real time
Current value S on gas circuit L lines, monitoring frequency are 3000 times per second；B, calculated by controller per microsecond current variation value
Derivative V and second dervative a；C, current value S and default maximum current value I are compared by controller, if S >=I, and V >=30A/ μ s,
And a >=5A/ μ s/μ s then judge that short circuit will occur for electric wiring；D, if it is determined that short circuit will occur for electric wiring, then control is passed through
Device disconnects relay, carries out power-off protection.A kind of electric wiring short circuit Forecasting Methodology of the present invention passes through current sensor and control
Device monitors the current value on electric wiring L lines, and the derivative and second dervative of calculating current value changes value in real time, you can pre- in time
Survey the generation of short-circuit conditions and carry out power-off protection.
Preferably, current sensor is Hall current sensor in the step A.
Set preferably, presetting maximum current value I in the step C according to the electrical equipment situation on electric wiring.
Preferably, if it is determined that short circuit will occur for electric wiring then starts alarm by controller simultaneously in the step D
Device carries out alarm, is easy to timely repair and maintenance.
Preferably, if it is determined that short circuit will occur for electric wiring then passes through the communication on controller simultaneously in the step D
Monitoring information is uploaded to background server by unit, is convenient for remote monitoring and data storage.
Preferably, electrical operation is provided with the controller recovers switch, when electric state is extensive by manual maintenance
It is multiple normal, it can be allowed by switch and electrically resumed operation.
Compared with prior art, a kind of beneficial effect of electric wiring short circuit Forecasting Methodology of the present invention：By monitoring in real time
Current conditions on electric wiring L lines, the generation of short-circuit conditions can be predicted in time and carries out power-off protection, it is possible to prevente effectively from electric
The generation of gas disaster, ensure the property and life security of people.
Brief description of the drawings
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
Fig. 1 is a kind of schematic diagram of electric wiring short circuit Forecasting Methodology of the present invention.
Embodiment
All features disclosed in this specification, or disclosed all methods or during the step of, except mutually exclusive
Feature and/or step beyond, can combine in any way.
Any feature disclosed in this specification, unless specifically stated otherwise, can be equivalent by other or with similar purpose
Alternative features are replaced.I.e., unless specifically stated otherwise, each feature is an example in a series of equivalent or similar characteristics
.
As shown in figure 1, a kind of electric wiring short circuit Forecasting Methodology of the present invention, comprises the following steps：A, current sense is passed through
Device and controller monitor the current value S on electric wiring L lines in real time, and monitoring frequency is 3000 times per second；B, controller meter is passed through
Calculate the derivative V and second dervative a per microsecond current variation value；C, current value S and default maximum current value are compared by controller
I, if S >=I, and V >=30A/ μ s, and a >=5A/ μ s/μ s then judge that short circuit will occur for electric wiring；D, if it is determined that electric wiring
Short circuit will occur, then relay is disconnected by controller, carry out power-off protection.Wherein, L lines are live wire.The controller includes
Single-chip microcomputer, model STC15W408AS.
As shown in figure 1, in a kind of electric wiring short circuit Forecasting Methodology of the present invention, current sensor is suddenly in the step A
That current sensor.Maximum current value I is preset in the step C to be set according to the electrical equipment situation on electric wiring.It is described
If it is determined that short circuit will occur for electric wiring then carries out alarm by controller startup siren simultaneously in step D.In the step D
If it is determined that short circuit will occur for electric wiring is then uploaded to background service by the communication unit on controller by monitoring information simultaneously
Device.Electrical operation is provided with the controller and recovers switch.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, every the present invention's
All any modification, equivalent and improvement made within spirit and principle etc., should be included in the scope of the protection.
Claims (6)
1. a kind of electric wiring short circuit Forecasting Methodology, it is characterised in that comprise the following steps：
A, the current value S on electric wiring L lines is monitored by current sensor and controller in real time, monitoring frequency is per second 3000
It is secondary；
B, the derivative V and second dervative a per microsecond current variation value are calculated by controller；
C, current value S and default maximum current value I are compared by controller, if S >=I, and V >=30A/ μ s, and a >=5A/ μ s/μ
S then judges that short circuit will occur for electric wiring；
D, if it is determined that short circuit will occur for electric wiring, then relay is disconnected by controller, carries out power-off protection.
A kind of 2. electric wiring short circuit Forecasting Methodology according to claim 1, it is characterised in that：Electric current in the step A
Sensor is Hall current sensor.
A kind of 3. electric wiring short circuit Forecasting Methodology according to claim 1, it is characterised in that：Preset in the step C
Maximum current value I is set according to the electrical equipment situation on electric wiring.
A kind of 4. electric wiring short circuit Forecasting Methodology according to claim 1, it is characterised in that：If sentence in the step D
Short circuit will be occurred then while carry out alarm by controller startup siren by determining electric wiring.
A kind of 5. electric wiring short circuit Forecasting Methodology according to claim 1, it is characterised in that：If sentence in the step D
Short circuit will be occurred then while monitoring information is uploaded into background server by the communication unit on controller by determining electric wiring.
A kind of 6. electric wiring short circuit Forecasting Methodology according to claim 1, it is characterised in that：Set on the controller
There is electrical operation to recover switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710977371.9A CN107884662B (en) | 2017-10-16 | 2017-10-16 | Electrical line short circuit prediction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710977371.9A CN107884662B (en) | 2017-10-16 | 2017-10-16 | Electrical line short circuit prediction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107884662A true CN107884662A (en) | 2018-04-06 |
| CN107884662B CN107884662B (en) | 2020-10-02 |
Family
ID=61781894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710977371.9A Active CN107884662B (en) | 2017-10-16 | 2017-10-16 | Electrical line short circuit prediction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107884662B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109142862A (en) * | 2018-09-06 | 2019-01-04 | 中国人民解放军海军工程大学 | A kind of intelligent electrically engineering survey system and its measurement method |
| CN111969725A (en) * | 2020-07-28 | 2020-11-20 | 福建集薪物联网科技有限公司 | Air switch with electricity safety advanced early warning function |
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| JPH0919046A (en) * | 1995-04-28 | 1997-01-17 | Mitsubishi Electric Corp | Insulation-degradation diagnostic apparatus |
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2017
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| JPH0919046A (en) * | 1995-04-28 | 1997-01-17 | Mitsubishi Electric Corp | Insulation-degradation diagnostic apparatus |
| CN1262802A (en) * | 1997-07-10 | 2000-08-09 | 西门子公司 | Method and system for detecting shot-circuit in low-voltage mains |
| CN101329381A (en) * | 2008-07-28 | 2008-12-24 | 庞元俊 | Method for detecting short circuit fault with current change rate |
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| CN103733080A (en) * | 2011-08-01 | 2014-04-16 | 维也纳技术大学 | Method and device for detecting a deterioration in the state of an insulation in an operating electric machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109142862A (en) * | 2018-09-06 | 2019-01-04 | 中国人民解放军海军工程大学 | A kind of intelligent electrically engineering survey system and its measurement method |
| CN111969725A (en) * | 2020-07-28 | 2020-11-20 | 福建集薪物联网科技有限公司 | Air switch with electricity safety advanced early warning function |
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| Publication number | Publication date |
|---|---|
| CN107884662B (en) | 2020-10-02 |
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