CN108982988A - A kind of power failure early warning diagnostic method - Google Patents
A kind of power failure early warning diagnostic method Download PDFInfo
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- CN108982988A CN108982988A CN201810516060.7A CN201810516060A CN108982988A CN 108982988 A CN108982988 A CN 108982988A CN 201810516060 A CN201810516060 A CN 201810516060A CN 108982988 A CN108982988 A CN 108982988A
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- pressure sensor
- resistance array
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- electric
- electric resistance
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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
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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)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Locating Faults (AREA)
Abstract
A kind of power failure early warning diagnostic method of the present invention, belongs to technical field of power systems；Including the loop checking installation with the coplanar setting of power circuit, ammeter A, parallel resistance array, electric resistance array controller and evaluation system are arranged in series on circuit；Wherein, electric resistance array controller changes the parallel resistance quantity on access circuit according to the current data of ammeter A, curent change data variation is the pressure data with linear region by setting guide rail, sliding block, alternating current generator, the pressure sensor and evaluation processor for tapping hammer, differential setting by evaluation system；On this basis, first progress high current fault diagnosis can be realized, then carry out the power fault detection method of low current fault diagnosis；Power fault detection system of the present invention and diagnostic method can be monitored the electric current of power circuit under conditions of not losing transmission of electricity electric energy, can carry out effective early warning before short circuits and open conductors occur.
Description
Technical field
The present invention relates to a kind of power fault detection methods, belong to technical field of power systems.
Background technique
The failure of electric system can generally speaking be divided into short circuits and open conductors two major classes.Wherein, short circuits
Refer to that various types of short troubles, open conductors are primarily referred to as various types of disconnection faults.
Either short circuits or open conductors are all easy to detection after the failure occurred and obtain, but during this time
It adopts remedial measures again, loss caused by some failures will can not make up.
It has been investigated that can all have omen, these omens are embodied in the variation of electric current, such as before electric power system fault occurs
What is realized using these curent changes carries out early warning diagnosis to failure, plays prevention effect, is that electric system needs primary study
Direction.
Summary of the invention
In view of the above-mentioned problems, the invention discloses a kind of power failure early warning diagnostic method, it is real using electromagnetic induction principle
Under conditions of not losing transmission of electricity electric energy now, the electric current of power circuit is monitored, it can be in short circuits and open conductors
Effective early warning is carried out before occurring, and positive effect is played for the safe operation of electric system.
The object of the present invention is achieved like this:
A kind of power failure early warning diagnostic method, including the loop checking installation with the coplanar setting of power circuit, circuit is arranged
On be arranged in series ammeter A, parallel resistance array, electric resistance array controller and evaluation system；
The current data of the ammeter A passes to electric resistance array controller；
The control signal of the electric resistance array controller passes to parallel resistance array, for changing access circuit on and
Join resistance quantity；
Ammeter A is for monitoring whether loop checking installation electric current is more than threshold value, in the case where controller, Resistor Array Projector
Column controller controls parallel resistance array, reduces the quantity of parallel resistance on access circuit；
The evaluation system includes guide rail, the sliding block slided on guide rail, the alternating current that control sliding block slides on guide rail
The percussion hammer below sliding block is arranged in machine, equidistant to be horizontally set on the left pressure sensor for tapping hammer two sides and right pressure biography
Sensor, the evaluation processor for connecting left pressure sensor and right pressure sensor and data capable of being handled and analyzed；
The left pressure sensor setting taps top when hammer is located at minimum point, and right pressure sensor setting taps hammer position
Lower section when minimum point, in the vertical direction, it is minimum to be equal to percussion hammer for left pressure sensor to the distance for tapping hammer minimum point
Point arrives the distance of right pressure sensor；
The evaluation processor subtracts each other the pressure data of left pressure sensor and the pressure data of right pressure sensor, and
Straight line fitting is carried out to linearity range, power failure is diagnosed according to the slope of linearity range.
The above composition power fault detection system.
The power failure early warning diagnostic method realized in above-mentioned power fault detection system, comprising the following steps:
Step a, high current fault diagnosis
Current data is passed to electric resistance array controller by ammeter A, and electric resistance array controller judges loop checking installation electric current
It whether is more than threshold value, if:
Controller, then judging result is that there are high current failures for electric system；Electric resistance array controller controls simultaneously
Join electric resistance array, reduces the quantity of parallel resistance on access circuit, repeat this step；
Electric current is no more than threshold value, then judging result is that high current failure is not present in electric system, enters step b；
Step b, low current fault diagnoses
Evaluation processor subtracts each other the pressure data of left pressure sensor and the pressure data of right pressure sensor, and to line
Property section carry out straight line fitting, if:
The absolute value of slope is more than threshold maximum value or is less than threshold value minimum value, then judging result is that there are small for electric system
Current failure repeats this step；
The absolute value of slope is no more than threshold maximum value or is less than threshold value minimum value, then judging result is that electric system is not deposited
In low current fault, terminate.
Above-mentioned power fault detection method, the current threshold, absolute value threshold maximum value and absolute value threshold value are most
Small value is obtained by statistical method or is rule of thumb chosen.
The utility model has the advantages that
The first, it is returned since each unit for diagnosing power failure is arranged at the annular of the coplanar setting of power circuit
On the road, it therefore will not be realized using the electric energy of power circuit under conditions of not losing transmission of electricity electric energy, to the electric current of power circuit
It is monitored；
The second, the parallel connection on access circuit can be changed according to the current data of ammeter A due to electric resistance array controller
Resistance quantity, therefore short circuits can not only be monitored, and can ensure that entire power fault detection system will not be because of transverse direction
Failure and he damages；
Third, be provided with percussion hammer and two pressure sensors, meanwhile, by two differential settings of sensor, pass through by
The variation of electric current becomes pressure change, while so that pressure data linear region is occurred by the conversion of signal and differential setting,
It can determine whether power failure by the slope of linear region, this not only simplifies data processings, and improve judgement precision.
Detailed description of the invention
Fig. 1 is the electrical connection schematic diagram of power fault detection system of the present invention, method.
Fig. 2 is the structural schematic diagram of evaluation system.
Fig. 3 is power fault detection method flow diagram of the present invention.
In figure: 1 parallel resistance array, 2 electric resistance array controllers, 3 evaluation systems, 31 guide rails, 32 sliding blocks, 33 alternating currents
Machine, 34 tap hammer, 35 left pressure sensors, 36 right pressure sensors, 37 evaluation processors.
Specific embodiment
The specific embodiment of the invention is described in further detail with reference to the accompanying drawing.
Specific embodiment one
The present embodiment is power fault detection system embodiment.
The power fault detection system of the present embodiment, electrical connection schematic diagram are as shown in Figure 1.The power fault detection system
Including the loop checking installation with the coplanar setting of power circuit, ammeter A, parallel resistance array 1, Resistor Array Projector are arranged in series on circuit
Column controller 2 and evaluation system 3；
The current data of the ammeter A passes to electric resistance array controller 2；
The control signal of the electric resistance array controller 2 passes to parallel resistance array 1, for changing on access circuit
Parallel resistance quantity；
Ammeter A is for monitoring whether loop checking installation electric current is more than threshold value, in the case where controller, Resistor Array Projector
Column controller 2 controls parallel resistance array 1, reduces the quantity of parallel resistance on access circuit；
3 structural schematic diagram of evaluation system is as shown in Figure 2.Evaluation system 3 includes guide rail 31, is slided on guide rail 31
The percussion hammer 34 below sliding block 32, equidistant water is arranged in sliding block 32, the alternating current generator 33 that control sliding block 32 slides on guide rail
It is flat that the left pressure sensor 35 and right pressure sensor 36 for tapping 34 two sides of hammer are set, connect left pressure sensor 35 and right pressure
Force snesor 36 and the evaluation processor 37 that data can be handled and analyzed；
The setting of left pressure sensor 35 taps top when hammer 34 is located at minimum point, and the right setting of pressure sensor 36 is struck
Hammer 34 is located at lower section when minimum point, in the vertical direction, left pressure sensor 35 to the distance for tapping 34 minimum points of hammer, etc.
In the distance of percussion 34 minimum points of hammer to right pressure sensor 36；
The evaluation processor 37 is by the pressure data of the pressure data of left pressure sensor 35 and right pressure sensor 36
Subtract each other, and straight line fitting is carried out to linearity range, power failure is diagnosed according to the slope of linearity range.
Specific embodiment two
The present embodiment is the power fault detection system realized in the power fault detection system described in specific embodiment one
Embodiment.
The power fault detection method of the present embodiment, flow chart are as shown in Figure 3.The power fault detection method includes following
Step:
Step a, high current fault diagnosis
Current data is passed to electric resistance array controller 2 by ammeter A, and electric resistance array controller 2 judges loop checking installation electricity
Whether stream is more than threshold value, if:
Controller, then judging result is that there are high current failures for electric system；Electric resistance array controller 2 controls simultaneously
Join electric resistance array 1, reduces the quantity of parallel resistance on access circuit, repeat this step；
Electric current is no more than threshold value, then judging result is that high current failure is not present in electric system, enters step b；
Step b, low current fault diagnoses
Evaluation processor 37 subtracts each other the pressure data of left pressure sensor 35 and the pressure data of right pressure sensor 36,
And straight line fitting is carried out to linearity range, if:
The absolute value of slope is more than threshold maximum value or is less than threshold value minimum value, then judging result is that there are small for electric system
Current failure repeats this step；
The absolute value of slope is no more than threshold maximum value or is less than threshold value minimum value, then judging result is that electric system is not deposited
In low current fault, terminate.
Using power fault detection system as above and diagnostic method, fault pre-alarming diagnosis discovery is realized, effectively convenient in advance
Safety precaution is taken, power system security and stabilization is effectively ensured.
Above-mentioned power failure early warning diagnostic method, the current threshold, absolute value threshold maximum value and absolute value threshold
It is worth minimum value, needs to combine loading condition, obtained by statistical method or rule of thumb chosen.Due to choosing value work for
Belong to conventional technical means for those skilled in the art, can also be obtained by limited trials, therefore in the present embodiment
It is not repeated to illustrate.
Claims (2)
1. a kind of power failure early warning diagnostic method, which is characterized in that
Loop checking installation with the coplanar setting of power circuit is set first, is arranged in series ammeter A, parallel resistance array on circuit
(1), electric resistance array controller (2) and evaluation system (3)；
The current data of the ammeter A passes to electric resistance array controller (2)；
The control signal of the electric resistance array controller (2) passes to parallel resistance array (1), for changing on access circuit
Parallel resistance quantity；
Ammeter A is for monitoring whether loop checking installation electric current is more than threshold value, in the case where controller, electric resistance array control
Device (2) processed controls parallel resistance array (1), reduces the quantity of parallel resistance on access circuit；
The evaluation system (3) includes guide rail (31), the sliding block (32) slided on guide rail (31), controls sliding block (32) in guide rail
(34) are hammered in the alternating current generator (33) of upper sliding, the percussion being arranged below sliding block (32) into shape, equidistant to be horizontally set on percussion hammer
(34) the left pressure sensor (35) and right pressure sensor (36) of two sides, connects left pressure sensor (35) and right pressure sensing
Device (36) and the evaluation processor (37) that data can be handled and analyzed；
Left pressure sensor (35) setting taps top when hammer (34) is located at minimum point, right pressure sensor (36) setting
Lower section when hammer (34) is located at minimum point is tapped, in the vertical direction, left pressure sensor (35) to percussion hammer (34) minimum point
Distance, be equal to tap hammer (34) minimum point to right pressure sensor (36) distance；
The evaluation processor (37) is by the number pressure of the pressure data of left pressure sensor (35) and right pressure sensor (36)
Straight line fitting is carried out according to subtracting each other, and to linearity range, power failure is diagnosed according to the slope of linearity range；
It is diagnosed according still further to following steps:
Step a, high current fault diagnosis
Ammeter A passes to current data electric resistance array controller (2), and electric resistance array controller (2) judges loop checking installation electricity
Whether stream is more than threshold value, if:
Controller, then judging result is that there are high current failures for electric system；Electric resistance array controller (2) control is in parallel
Electric resistance array (1) reduces the quantity of parallel resistance on access circuit, repeats this step；
Electric current is no more than threshold value, then judging result is that high current failure is not present in electric system, enters step b；
Step b, low current fault diagnoses
Evaluation processor (37) is by the pressure data phase of the pressure data of left pressure sensor (35) and right pressure sensor (36)
Subtract, and straight line fitting is carried out to linearity range, if:
The absolute value of slope is more than threshold maximum value or is less than threshold value minimum value, then judging result is that there are low currents for electric system
Failure repeats this step；
The absolute value of slope is no more than threshold maximum value or is less than threshold value minimum value, then judging result is that there is no small for electric system
Current failure terminates.
2. power failure early warning diagnostic method according to claim 1, which is characterized in that the current threshold, absolutely
It is worth threshold maximum value and absolute value threshold value minimum value, is obtained by statistical method or rule of thumb chosen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810516060.7A CN108982988B (en) | 2016-05-25 | 2016-05-25 | Power failure early warning diagnosis method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810516060.7A CN108982988B (en) | 2016-05-25 | 2016-05-25 | Power failure early warning diagnosis method |
| CN201610351503.2A CN105954620B (en) | 2016-05-25 | 2016-05-25 | A kind of power fault detection system |
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| CN201610351503.2A Division CN105954620B (en) | 2016-05-25 | 2016-05-25 | A kind of power fault detection system |
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| CN108982988A true CN108982988A (en) | 2018-12-11 |
| CN108982988B CN108982988B (en) | 2020-10-30 |
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| CN201810276279.4A Active CN108445325B (en) | 2016-05-25 | 2016-05-25 | Power failure diagnosis system |
| CN201810276766.0A Active CN108469565B (en) | 2016-05-25 | 2016-05-25 | Power failure diagnosis method and application thereof in power failure diagnosis |
| CN201810276509.7A Active CN108318765B (en) | 2016-05-25 | 2016-05-25 | Power failure diagnosis method |
| CN201610351503.2A Active CN105954620B (en) | 2016-05-25 | 2016-05-25 | A kind of power fault detection system |
| CN201810516060.7A Active CN108982988B (en) | 2016-05-25 | 2016-05-25 | Power failure early warning diagnosis method |
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| CN201810276279.4A Active CN108445325B (en) | 2016-05-25 | 2016-05-25 | Power failure diagnosis system |
| CN201810276766.0A Active CN108469565B (en) | 2016-05-25 | 2016-05-25 | Power failure diagnosis method and application thereof in power failure diagnosis |
| CN201810276509.7A Active CN108318765B (en) | 2016-05-25 | 2016-05-25 | Power failure diagnosis method |
| CN201610351503.2A Active CN105954620B (en) | 2016-05-25 | 2016-05-25 | A kind of power fault detection system |
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| CN108445325B (en) * | 2016-05-25 | 2020-09-04 | 西安兆腾测控技术有限公司 | Power failure diagnosis system |
| JP6230677B1 (en) * | 2016-10-20 | 2017-11-15 | 三菱電機株式会社 | Control device and control method for rotating electrical machine |
| CN108828375B (en) * | 2018-08-17 | 2020-08-14 | 国网江苏省电力有限公司电力科学研究院 | Air-conditioning power monitoring system and monitoring method based on dual-loop smart energy meter |
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- 2016-05-25 CN CN201810276509.7A patent/CN108318765B/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105954620B (en) | 2018-09-07 |
| CN108469565B (en) | 2020-10-27 |
| CN108318765B (en) | 2020-11-27 |
| CN108318765A (en) | 2018-07-24 |
| CN108469565A (en) | 2018-08-31 |
| CN108445325B (en) | 2020-09-04 |
| CN108982988B (en) | 2020-10-30 |
| CN108445325A (en) | 2018-08-24 |
| CN105954620A (en) | 2016-09-21 |
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