CN107144767A - A kind of accident indicator and fault-signal detection method - Google Patents
A kind of accident indicator and fault-signal detection method Download PDFInfo
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- CN107144767A CN107144767A CN201710593677.4A CN201710593677A CN107144767A CN 107144767 A CN107144767 A CN 107144767A CN 201710593677 A CN201710593677 A CN 201710593677A CN 107144767 A CN107144767 A CN 107144767A
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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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Measurement Of Current Or Voltage (AREA)
- Locating Faults (AREA)
Abstract
The application is related to distribution network failure field of locating technology, and in particular to a kind of accident indicator and fault-signal detection method.Existing accident indicator and fault-signal detection method can not effectively avoid fundamental wave, and the accuracy of its fault location result is affected.The application provides a kind of accident indicator, including field strength collecting unit, load current collecting unit and feedback unit；The field strength collecting unit includes field strength acquisition module, field strength analog-to-digital conversion module and micro-control module；The load current collecting unit includes load current acquisition module, Current Voltage modular converter, difference block and analog-to-digital conversion module；The feedback unit includes D/A converter module, low-pass filtering module and amplitude adjusting module.Preferably extract fault signature；Strengthen the accuracy of generation and the positioning of failure judgement.The application further relates to a kind of fault-signal detection method.
Description
Technical field
The application is related to distribution network failure field of locating technology, and in particular to a kind of accident indicator and fault-signal inspection
Survey method.
Background technology
Line fault is multiple to be born in power distribution network, and distribution net work structure is complicated, and branch is numerous, once break down, it is difficult to it is rapid
The localization of faults, for the phase fault that fault current is larger, accident indicator has certain accuracy；Circuit event
Hindering instruction device is applied on electric line, power cable and switch cubicle inlet-outlet line, for indicating fault current circulation
Device.Once line failure, track walker can by instruction device alarm indication, the rapid localization of faults, exclude therefore
Barrier.Thoroughly change blindness line walking in the past, segmentation combined floodgate power transmission searches the backwardness way of failure.
The widely used small current neutral grounding system of China's power distribution network, i.e. isolated neutral, neutral by arc extinction coil grounding,
Or neutral point is through high resistance ground, in small current neutral grounding system, when occurring singlephase earth fault, feature is not obvious, it is difficult to pair event
Barrier positioning, especially in grounding through arc, arc suppression coil is compensated capacitance current so that conventional fault electric current is almost
Disappear, influence the accuracy of fault location.Now, information can be given to fault location is higher hamonic wave, transient current, stable state
The characteristic quantities such as current variation value, but be due to 50Hz fundamental wave energy greatly, further feature discharge amplitude very little, dfundamental-harmonic pair signal production
Raw severe jamming.
Existing accident indicator and fault-signal detection method can not effectively avoid fundamental wave, and its failure is determined
The accuracy of position result is affected.
The content of the invention
The purpose of the application can not to solve above-mentioned existing accident indicator and fault-signal detection method
Fundamental wave is effectively avoided, and causes the problem of accuracy of its fault location result is affected.
Therefore, the embodiments of the invention provide following technical scheme：A kind of accident indicator, including field strength collection are single
Member, load current collecting unit and feedback unit；
The field strength collecting unit includes field strength acquisition module, the field strength acquisition module and field strength analog-to-digital conversion module phase
Connect, the field strength analog-to-digital conversion module connects with micro-control module；
The load current collecting unit includes load current acquisition module, the load current acquisition module and electric current electricity
Pressure modular converter is connected, and the Current Voltage modular converter is connected with difference block, the difference block and analog-to-digital conversion
Module is connected, and the analog-to-digital conversion module connects with micro-control module；
The feedback unit includes micro-control module, and the micro-control module is connected with D/A converter module, the number
Mould modular converter is connected with low-pass filtering module, and the low-pass filtering module is connected with amplitude adjusting module.
Alternatively, in addition to data transmission unit, the data transmission unit includes micro-control module, the micro-control molding
Block is connected with communication module, and the communication module is connected with data collection module.
Alternatively, the D/A converter module output includes 50Hz power frequency component, the D/A converter module and load
The same phase of output of current sample module.
Alternatively, the analog-to-digital conversion module output includes fault transient state current, higher harmonic components or stable state mutation
The composite value of electric current.
Alternatively, the input of the difference block includes output or the D/A converter module of Current Voltage modular converter
Output.
Alternatively, the higher hamonic wave includes 5 subharmonic.
A kind of fault-signal detection method, the detection method comprises the following steps：
S1 is initialized, and sets D/A converter module to be output as 0, and the output of load current sampling module is turned through Current Voltage
Mold changing block is converted into voltage and inputted to difference block, the load signal of the output of difference block through analog-to-digital conversion module input to
Micro-control module；
S2 normal samples, will be set to a timeslice per 20*N milliseconds, and micro-control module is according to the mould of a upper timeslice
The differential output signal output of number modular converter calculates the component size of the 50Hz fundamental waves and its harmonic wave that obtain differential signal；Simultaneously
With reference to the output of the D/A converter module of a upper timeslice, the output for the D/A converter module for obtaining current time piece is calculated,
When the output of load current sampling module is constant so that the 50Hz fundamental waves output of the analog-to-digital conversion module of current time piece is minimum
Change, the output of D/A converter module filters out the high frequency saltus step component of D/A converter module, micro-control molding by low-pass filtering module
Block has been filtered out the differential signal of 50Hz power frequencies；
When the input of S3 analog-to-digital conversion modules exceeds threshold value, recording is started to difference load current；
When the change of S4 field strength exceeds threshold value, recording is started to difference load current.
Alternatively, the detection method also comprises the following steps：The recorder data is uploaded to through communication module collects mould
Block.
Alternatively, the fault recorder data is uploaded to after collection module, by collection module failure judgement position, or is collected
Fault recorder data is uploaded to fault detector main station system by module, collects mould by fault detector main station system synthesis is all
The recorder data comprehensive descision abort situation of block.
Alternatively, the timeslice parameter N includes any positive integer.
Technical scheme provided in an embodiment of the present invention includes following beneficial effect：The application is made by setting difference block
50Hz fundamental waves are filtered out with difference method, by low-pass filtering module, the high frequency saltus step component of D/A converter module is filtered out, obtains 5
The characteristic quantities such as the composite value of order harmonic components, transient current and stable state mutation current, preferably extract fault signature；Enhancing judges
The accuracy of generation and the positioning of failure.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be attached to what is used required in embodiment
Figure is briefly described, it should be apparent that, for those of ordinary skills, before creative labor is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of accident indicator principle schematic in the embodiment of the present invention；
Symbol in Fig. 1 is expressed as：
1- field strength acquisition modules, 2- field strength analog-to-digital conversion modules, 3- micro-control modules, 4- load current acquisition modules, 5-
Current Voltage modular converter, 6- difference blocks, 7- analog-to-digital conversion modules, 8- D/A converter modules, 9- low-pass filtering modules, 10-
Amplitude adjusting module, 11- communication modules.
Embodiment
Accompanying drawing herein is merged in specification and constitutes the part of this specification, shows the implementation for meeting the present invention
Example, and for explaining principle of the invention together with specification.
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without having to pay creative labor, can also obtain other accompanying drawings according to these accompanying drawings.
Embodiment one
Referring to Fig. 1, the embodiment of the present invention provides a kind of accident indicator, including field strength collecting unit, load current are adopted
Collect unit and feedback unit；
The field strength collecting unit includes field strength acquisition module 1, the field strength acquisition module 1 and field strength analog-to-digital conversion module
2 connect, and the field strength analog-to-digital conversion module 2 connects with micro-control module 3；
The load current collecting unit includes load current acquisition module 4, the load current acquisition module 4 and electric current
Voltage transformation module 5 is connected, and the Current Voltage modular converter 5 is connected with difference block 6, the difference block 6 and mould
Number modular converter 7 is connected, and the analog-to-digital conversion module 7 connects with micro-control module 3；
The feedback unit includes micro-control module 3, and the micro-control module 3 is connected with D/A converter module 8, described
D/A converter module 8 is connected with low-pass filtering module 9, and the low-pass filtering module 9 is connected with amplitude adjusting module 10.
Specifically, field strength acquisition module 1, the field intensity signal analog quantity for detection load circuit is sampled；Field strength modulus
Modular converter 2, for the digitlization of field intensity signal analog quantity.Load current acquisition module 4, for detection load current sample；Electricity
Voltage transformation module 5 is flowed, voltage is converted into for load current sampled value；Difference block 6, for the load electricity after voltage
Flow valuve is subtracted each other with the same phase power-frequency voltage that micro-control module is produced, and is filtered out the power frequency steady-state component in load current, is obtained difference
Load current value, i.e. fault transient state current, higher harmonic components, the composite value of stable state mutation current；Analog-to-digital conversion module 7, is used
In the digitlization of difference load current value, the sampling rate of the AD conversion unit can be set；D/A converter module 8, for micro-control
The same phase power-frequency voltage that molding block is produced carries out digital-to-analogue conversion, and the sampling rate of the D/A conversion unit can be set；LPF
Module 9, high fdrequency component is filtered out to the same phase power-frequency voltage that micro-control module is produced；Amplitude adjusting module 10, to micro-control module 3
The amplitude of the same phase power-frequency voltage produced is adjusted, micro-control module 3, for calculating input difference load current, electric field letter
Number and calculate output power-frequency voltage signal.
Embodiment two
Referring to Fig. 1, the embodiment of the present invention provides a kind of accident indicator, including field strength collecting unit, load current are adopted
Collect unit and feedback unit；
The field strength collecting unit includes field strength acquisition module 1, the field strength acquisition module 1 and field strength analog-to-digital conversion module
2 connect, and the field strength analog-to-digital conversion module 2 connects with micro-control module 3；
The load current collecting unit includes load current acquisition module 4, the load current acquisition module 4 and electric current
Voltage transformation module 5 is connected, and the Current Voltage modular converter 5 is connected with difference block 6, the difference block 6 and mould
Number modular converter 7 is connected, and the analog-to-digital conversion module 7 connects with micro-control module 3；
The feedback unit includes micro-control module 3, and the micro-control module 3 is connected with D/A converter module 8, described
D/A converter module 8 is connected with low-pass filtering module 9, and the low-pass filtering module 9 is connected with amplitude adjusting module 10.
Alternatively, in addition to data transmission unit, the data transmission unit includes micro-control module 3, the microcontroller
Module 3 is connected with communication module 11, and the communication module 11 is connected with data collection module.
Alternatively, the output of D/A converter module 8 includes 50Hz power frequency component, and the D/A converter module 8 is with bearing
The same phase of output of charged current sampling module 4.
Alternatively, the output of analog-to-digital conversion module 7 includes fault transient state current, higher harmonic components or stable state mutation
The composite value of electric current.
Alternatively, the input of the difference block 6 includes output or the D/A converter module of Current Voltage modular converter 5
8 output.
Alternatively, the higher hamonic wave includes 5 subharmonic.
Specifically, field strength acquisition module 1, the field intensity signal analog quantity for detection load circuit is sampled；Field strength modulus
Modular converter 2, for the digitlization of field intensity signal analog quantity.Load current acquisition module 4, for detection load current sample；Electricity
Voltage transformation module 5 is flowed, voltage is converted into for load current sampled value；Difference block 6, for the load electricity after voltage
Flow valuve is subtracted each other with the same phase power-frequency voltage that micro-control module is produced, and is filtered out the power frequency steady-state component in load current, is obtained difference
Load current value, i.e. fault transient state current, higher harmonic components, the composite value of stable state mutation current；Analog-to-digital conversion module 7, is used
In the digitlization of difference load current value, the sampling rate of the AD conversion unit can be set；D/A converter module 8, for micro-control
The same phase power-frequency voltage that molding block is produced carries out digital-to-analogue conversion, and the sampling rate of the D/A conversion unit can be set；LPF
Module 9, high fdrequency component is filtered out to the same phase power-frequency voltage that micro-control module is produced；Amplitude adjusting module 10, to micro-control module 3
The amplitude of the same phase power-frequency voltage produced is adjusted, micro-control module 3, for calculating input difference load current, electric field letter
Number and calculate output power-frequency voltage signal, while by communication modules 11, difference load current value and electric-field intensity being uploaded and converged
Collect unit.
Embodiment three
Referring to Fig. 1, the embodiment of the present invention provides a kind of fault-signal detection method, and the detection method includes following step
Suddenly：
S1 is initialized, and sets D/A converter module 8 to be output as 0, by the output of load current sampling module 4 through Current Voltage
Modular converter 5 is converted into voltage and inputted to difference block 6, and now, another input of difference block 6 is zero, difference block 6
Original load signal is output as, through analog-to-digital conversion module 7, output to micro-control module 3；
S2 normal samples, will be set to a timeslice per 20*N milliseconds, and micro-control module 3 is according to the mould of a upper timeslice
The differential output signal output of number modular converter 7 calculates the component size of the 50Hz fundamental waves and its harmonic wave that obtain differential signal；Together
When with reference to a upper timeslice D/A converter module 8 output, calculate (so that differential signal fundamental wave minimize, while also may be used
Filter out nth harmonic as needed) obtain current time piece D/A converter module 8 output, in load current sampling module 4
When exporting constant so that the 50Hz fundamental waves output of the analog-to-digital conversion module 7 of current time piece is minimized, D/A converter module 8
Output filters out the high frequency saltus step component of D/A converter module 8 by low-pass filtering module 9, now micro-control module 3 obtain it is defeated
Enter to have filtered out the differential signal of 50Hz power frequencies (as needed also can be while filtering out nth harmonic),；
S3 failures triggering-current trigger, when the input of analog-to-digital conversion module 7 exceeds threshold value, starts to difference load current
Recording；
S4 failures triggering-field strength triggering, when field strength change exceeds threshold value, recording is started to difference load current.
Specifically, step one, in first timeslice, first 20*N milliseconds, fault detector initialization, micro-control molding
The control D/A converter module 8 of block 3 output zero, now one end input of difference block 6 is 0, and other end input is adopted for load current
Sample value.The analog-to-digital conversion module 7 that micro-control module 3 is obtained is output as load current Wave data, 3 pair first of micro-control module
Digitized sampled data in the 20*M milliseconds of individual timeslice is handled (M is no more than N, the integer not less than 1), obtains defeated
Enter the phase information of signal and the root mean square information of amplitude, while phase information and the root mean square letter of amplitude according to input signal
Breath, generates power frequency output signal, in second timeslice through D/A converter module 8, amplitude adjusting module 10 is connected to difference block
6 input.
Step 2, in second timeslice, second 20*N milliseconds, the 20*M of second timeslice of micro-control module 3 pair
Digitized sampled data (difference load current) in millisecond is handled (M is no more than N, the integer not less than 1), obtains difference
Divide the phase information of load current and the root mean square information of amplitude, while to the amplitude of current output power frequency component, phase is carried out
Adjustment so that the phase of the phase of power frequency component, amplitude and load current, amplitude is consistent, and in next timeslice through digital-to-analogue
Modular converter 8, amplitude adjusting module 10 is connected to an input of difference block 6.
Step 3, repeat step two.
Step 4, the difference load current that micro-control module 3 is obtained is exactly fault transient state current, higher harmonic components, surely
The composite value of state mutation current.
Step 5, the amplitude for the difference load current that micro-control module 3 is obtained exceeds threshold value, and difference load current is started
Recording.
Step 6, field strength analog-to-digital conversion module 2 is exported to micro-control module 3, when field strength changing value exceeds threshold value, to difference
Load current is divided to start recording.
Example IV
Referring to Fig. 1, the embodiment of the present invention provides a kind of fault-signal detection method, and the detection method includes following step
Suddenly：
S1 is initialized, and sets D/A converter module 8 to be output as 0, by the output of load current sampling module 4 through Current Voltage
Modular converter 5 is converted into voltage and inputted to difference block 6, and now, another input of difference block 6 is zero, difference block 6
Original load signal is output as, through analog-to-digital conversion module 7, output to micro-control module 3；
S2 normal samples, will be set to a timeslice per 20*N milliseconds, and micro-control module 3 is according to the mould of a upper timeslice
The differential output signal output of number modular converter 7 calculates the component size of the 50Hz fundamental waves and its harmonic wave that obtain differential signal；Together
When with reference to a upper timeslice D/A converter module 8 output, calculate (so that differential signal fundamental wave minimize, while also may be used
Filter out nth harmonic as needed) obtain current time piece D/A converter module 8 output, in load current sampling module 4
When exporting constant so that the 50Hz fundamental waves output of the analog-to-digital conversion module 7 of current time piece is minimized, D/A converter module 8
Output filters out the high frequency saltus step component of D/A converter module 8 by low-pass filtering module 9, now micro-control module 3 obtain it is defeated
Enter to have filtered out the differential signal of 50Hz power frequencies (as needed also can be while filtering out nth harmonic),；
S3 failures triggering-current trigger, when the input of analog-to-digital conversion module 7 exceeds threshold value, starts to difference load current
Recording；
S4 failures triggering-field strength triggering, when field strength change exceeds threshold value, recording is started to difference load current.
Alternatively, the recorder data is uploaded to collection module through communication module 11.
Alternatively, the fault recorder data is uploaded to after collection module, by collection module failure judgement position, or is collected
Fault recorder data is uploaded to fault detector main station system by module, collects mould by fault detector main station system synthesis is all
The recorder data comprehensive descision abort situation of block.
Alternatively, the timeslice parameter N includes any positive integer.
Specifically, step one, in first timeslice, first 20*N milliseconds, fault detector initialization, micro-control molding
The control D/A converter module 8 of block 3 output zero, now one end input of difference block 6 is 0, and other end input is adopted for load current
Sample value.The analog-to-digital conversion module 7 that micro-control module 3 is obtained is output as load current Wave data, 3 pair first of micro-control module
Digitized sampled data in the 20*M milliseconds of individual timeslice is handled (M is no more than N, the integer not less than 1), obtains defeated
Enter the phase information of signal and the root mean square information of amplitude, while phase information and the root mean square letter of amplitude according to input signal
Breath, generates power frequency output signal, in second timeslice through D/A converter module 8, amplitude adjusting module 10 is connected to difference block
6 input.
Step 2, in second timeslice, second 20*N milliseconds, the 20*M of second timeslice of micro-control module 3 pair
Digitized sampled data (difference load current) in millisecond is handled (M is no more than N, the integer not less than 1), obtains difference
Divide the phase information of load current and the root mean square information of amplitude, while to the amplitude of current output power frequency component, phase is carried out
Adjustment so that the phase of the phase of power frequency component, amplitude and load current, amplitude is consistent, and in next timeslice through digital-to-analogue
Modular converter 8, amplitude adjusting module 10 is connected to an input of difference block 6.
Step 3, repeat step two.
Step 4, the difference load current that micro-control module 3 is obtained is exactly fault transient state current, higher harmonic components, surely
The composite value of state mutation current.
Step 5, the amplitude for the difference load current that micro-control module 3 is obtained exceeds threshold value, and difference load current is started
Recording is simultaneously uploaded to collection module by communication module 11.
Step 6, field strength analog-to-digital conversion module 2 is exported to micro-control module 3, when field strength changing value exceeds threshold value, to difference
Load current is divided to start recording and be uploaded to collection module by communication module 11.
The application filters out 50Hz fundamental waves by setting difference block 6 using difference method, passes through low-pass filtering module 9, filter
Except the high frequency saltus step component of D/A converter module, composite value of 5 order harmonic components, transient current and stable state mutation current etc. is obtained
Characteristic quantity, preferably extracts fault signature；Strengthen the accuracy of generation and the positioning of failure judgement.
Described above is only the embodiment of the embodiment of the present invention, is made skilled artisans appreciate that or realizing
The present invention.A variety of modifications to these embodiments will be apparent to one skilled in the art, determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, originally
Invention is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty
Consistent most wide scope.
It should be appreciated that the content that the application is not limited to be described above and is shown in the drawings, and can
To carry out various modifications and changes without departing from the scope.Scope of the present application is only limited by appended claim.
Claims (10)
1. a kind of accident indicator, it is characterised in that including field strength collecting unit, load current collecting unit and feedback
Member；
The field strength collecting unit includes field strength acquisition module, and the field strength acquisition module connects with field strength analog-to-digital conversion module,
The field strength analog-to-digital conversion module connects with micro-control module；
The load current collecting unit includes load current acquisition module, and the load current acquisition module turns with Current Voltage
Mold changing block is connected, and the Current Voltage modular converter is connected with difference block, the difference block and analog-to-digital conversion module
It is connected, the analog-to-digital conversion module connects with micro-control module；
The feedback unit includes micro-control module, and the micro-control module is connected with D/A converter module, and the digital-to-analogue turns
Mold changing block is connected with low-pass filtering module, and the low-pass filtering module is connected with amplitude adjusting module.
2. device as claimed in claim 1, it is characterised in that also including data transmission unit, the data transmission unit bag
Micro-control module is included, the micro-control module is connected with communication module, and the communication module is connected with data collection module.
3. device as claimed in claim 1, it is characterised in that the D/A converter module output includes 50Hz power frequency letter
Number, the D/A converter module and the same phase of output of load current sampling module.
4. the device stated such as claim 1, it is characterised in that the analog-to-digital conversion module output includes fault transient state current, height
The composite value of order harmonic components or stable state mutation current.
5. the device stated such as claim 1, it is characterised in that the input of the difference block includes Current Voltage modular converter
Output or the output of D/A converter module.
6. the device stated such as claim 4, it is characterised in that the higher hamonic wave includes 5 subharmonic.
7. a kind of fault-signal detection method, it is characterised in that the detection method comprises the following steps：
S1 is initialized, and sets D/A converter module to be output as 0, by the output of load current sampling module through Current Voltage modulus of conversion
Block is converted into voltage and inputted to difference block, and the load signal of the output of difference block is inputted to micro-control through analog-to-digital conversion module
Molding block；
S2 normal samples, will be set to a timeslice per 20*N milliseconds, and micro-control module turns according to the modulus of a upper timeslice
The differential output signal output of mold changing block calculates the component size of the 50Hz fundamental waves and its harmonic wave that obtain differential signal；With reference to
The output of the D/A converter module of a upper timeslice, calculates the output for the D/A converter module for obtaining current time piece, in load
When the output of current sample module is constant so that the 50Hz fundamental waves output of the analog-to-digital conversion module of current time piece is minimized, number
The output of mould modular converter filters out the high frequency saltus step component of D/A converter module by low-pass filtering module, and micro-control module is obtained
To the differential signal for having filtered out 50Hz power frequencies；
When the input of S3 analog-to-digital conversion modules exceeds threshold value, recording is started to difference load current；
When the change of S4 field strength exceeds threshold value, recording is started to difference load current.
8. method as claimed in claim 7, it is characterised in that the detection method also comprises the following steps：The recording number
Collection module is uploaded to according to through communication module.
9. method as claimed in claim 8, it is characterised in that the fault recorder data is uploaded to after collection module, by converging
Collect module failure judgement position, or fault recorder data is uploaded to fault detector main station system by collection module, is referred to by failure
Show that device main station system integrates the recorder data comprehensive descision abort situation of all collection modules.
10. method as claimed in claim 7, it is characterised in that the timeslice parameter N includes any positive integer.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109001593A (en) * | 2018-07-16 | 2018-12-14 | 北京映翰通网络技术股份有限公司 | A kind of distribution network failure recording control method |
| CN113049913A (en) * | 2021-03-15 | 2021-06-29 | 广东电网有限责任公司梅州供电局 | Distribution line online monitoring method, device and system |
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