CN110221202A - A kind of current curve treating method and apparatus of the operating current of breaker - Google Patents
A kind of current curve treating method and apparatus of the operating current of breaker Download PDFInfo
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- CN110221202A CN110221202A CN201910646227.6A CN201910646227A CN110221202A CN 110221202 A CN110221202 A CN 110221202A CN 201910646227 A CN201910646227 A CN 201910646227A CN 110221202 A CN110221202 A CN 110221202A
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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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
Abstract
This application provides a kind of current curve treating method and apparatus of the operating current of breaker, specially to detect current curve carry out zero point correction processing；The position for determining valid data in the current curve by zero point correction processing, obtains effective current data segment according to position from current curve；Longitudinal filtering processing is carried out to effective current data segment according to preset longitudinal filtering upper limit value and longitudinal filtering lower limit value；Lateral filtering processing is carried out to the effective current data segment by being longitudinally filtered according to preset laterally filtering lower limit value.Interference therein can be removed by above-mentioned processing, to be the operating current that current curve can really reflect breaker.
Description
Technical field
This application involves T & D Technology fields, bent more specifically to a kind of electric current of the operating current of breaker
Line treating method and apparatus.
Background technique
Divide-shut brake coil is the important composition that gas insulation metal seal combined electrical apparatus (GIS) breaker carries out division operation
Can part, its state relation be normally carried out breaking-closing operating to breaker.In order to which the state to breaker is monitored, need
Will the operating current of divide-shut brake coil to breaker carry out signal acquisition, but since breaker peripheral electromagnetic field is complicated, be easy
So that the current curve of the operating current of the divide-shut brake coil of acquisition interference waveform is occurred, leads to not really reflect its work electricity
Stream.
Summary of the invention
In view of this, the application provides a kind of current curve treating method and apparatus of the operating current of breaker, it is used for
The current curve of the operating current of breaker is handled, so that the current curve can really reflect the work electricity of breaker
Stream.
To achieve the goals above, it is proposed that scheme it is as follows:
A kind of current curve processing method of the operating current of breaker, comprising steps of
To detect current curve carry out zero point correction processing；
The position for determining valid data in the current curve by zero point correction processing, according to the position from the electric current
Effective current data segment is obtained in curve；
The effective current data segment is carried out according to preset longitudinal filtering upper limit value and longitudinal filtering lower limit value longitudinal
Filtering processing；
It is horizontal to being carried out by the effective current data segment being longitudinally filtered according to preset laterally filtering lower limit value
To filtering processing.
Optionally, detect that current curve carries out zero point correction processing for described pair, comprising:
Each data point on the current curve is traversed according to preset null offset limit value, is obtained close with zero point
All current values, and carry out data sectional；
Calculate the average value of all data in each described segmentation；
Difference operation is carried out to all data in corresponding segmentation according to each average value.
Optionally, the determining position for passing through valid data in the current curve that zero point correction is handled, according to institute's rheme
Set the acquisition effective current data segment from the current curve, comprising:
According to the minimum value x of preset magnet movement trigger current, draw y=x's in the coordinate system of the current curve
Straight line, the straight line, which is generated, generates two crosspoints, respectively the first crosspoint and the second crosspoint with the current curve；
Along the first zero position of the first crosspoint Look-ahead data, looked into backward along second crosspoint
Look for the second dead-center position of data；
The curve on the current curve between the first zero position and second dead-center position will be taken to select
It is set to the effective current data segment.
Optionally, described that lower limit value is filtered to the effective current data according to preset longitudinal filtering upper limit value and longitudinal direction
Duan Jinhang is longitudinally filtered, comprising:
Calculate the difference of the current value of all adjacent two o'clocks in the effective current data segment；
If the difference, which is less than longitudinal filtering lower limit value or is greater than the longitudinal direction, filters upper limit value, will be adjacent
Its previous current value of the current value of later point and the average value of multiple current values thereafter replace in two o'clock.
Optionally, described that lower limit value is filtered to by the effective current number being longitudinally filtered according to preset transverse direction
Lateral filtering processing is carried out according to section, comprising:
Calculate the current differential of the current value of all adjacent two o'clocks in the effective current data segment, obtained multiple electricity
It flows difference and constitutes data sequence d；
If two neighboring current differential is all positive number or is all negative in the data sequence, first group is assigned to
In, it otherwise assigns in second group, and the index of corresponding current differential is stored as index sequence i.
Calculate the data difference to adjacent two data in the index sequence；
If the data difference is positive number and is less than the laterally filtering lower limit value, in the effective current data segment
The value of the index data point identical with the value of i2 in the index sequence i of data point d1 uses the data point before data point d1
Value substitution；
If the data difference is negative and its absolute value is less than the laterally filtering lower limit value, by effective electricity
The value of the index of data point d1 data point identical with the value of i1 in index sequence i uses after data point d1 in flow data section
The value of data point substitutes.
A kind of current curve processing unit of the operating current of breaker, comprising:
Zero point correction module, for detect current curve carry out zero point correction processing；
Data decimation module, for determining the position of valid data in the current curve by zero point correction processing, according to
The position obtains effective current data segment from the current curve；
Longitudinal filter module, for filtering upper limit value and longitudinal filtering lower limit value to effective electricity according to preset longitudinal direction
Flow data section carries out longitudinal filtering processing；
Lateral filter module, for according to it is preset laterally filtering lower limit value to by it is described be longitudinally filtered it is effective
Current data section carries out lateral filtering processing.
Optionally, the zero point correction module includes:
Data segmentation unit, for traversing each data on the current curve according to preset null offset limit value
Point, acquisition and all current values similar in zero point, and carry out data sectional；
First computing unit, for calculating the average value of all data in each described segmentation；
Second computing unit, for carrying out difference fortune to all data in corresponding segmentation according to each average value
It calculates.
Optionally, the data decimation module includes:
Third computing unit, for the minimum value x according to preset magnet movement trigger current, in the current curve
The straight line of y=x is drawn in coordinate system, the straight line, which is generated, generates two crosspoints with the current curve, and respectively first intersects
Point and the second crosspoint；
Location lookup unit, for the first zero position along the first crosspoint Look-ahead data, along institute
State the second dead-center position that data are searched in the second crosspoint backward；
Data select unit, for that will take on the current curve between the first zero position and second zero point
Curve between position is chosen to be the effective current data segment.
Optionally, longitudinal filter module includes:
4th computing unit, for calculating the difference of the current value of all adjacent two o'clocks in the effective current data segment；
First substituting unit, if being less than longitudinal filtering lower limit value for the difference or being greater than longitudinal filter
Wave upper limit value, then by the average value of its previous current value of the current value of later point in adjacent two o'clock and multiple current values thereafter
Replace.
Optionally, the lateral filter module includes:
5th computing unit, for calculating the current difference of the current value of all adjacent two o'clocks in the effective current data segment
Value, obtained multiple current differentials constitute data sequence d；
Data packet units, if being all positive number for two neighboring current differential in the data sequence or being negative together
Number, then assign in first group, otherwise assign in second group, and the index of corresponding current differential is stored as index sequence i.
6th computing unit, for calculating the data difference to adjacent two data in the index sequence；
Second substituting unit, if being positive number for the data difference and being less than the laterally filtering lower limit value, institute
The value for stating the index data point identical with the value of i2 in the index sequence i of data point d1 in effective current data segment uses number
The value of data point before the d1 of strong point substitutes；
Third substituting unit, if be used for, the data difference is negative and its absolute value is less than the laterally filtering lower limit
Value, then by the value of the index of data point d1 in effective current data segment data point identical with the value of i1 in index sequence i
It is substituted using the value of the data point after data point d1.
It can be seen from the above technical scheme that this application discloses at a kind of current curve of the operating current of breaker
Manage method and apparatus, specially to detect current curve carry out zero point correction processing；Determine the electricity by zero point correction processing
The position of valid data in flow curve obtains effective current data segment according to position from current curve；According to preset longitudinal direction
It filters upper limit value and longitudinal filtering lower limit value and longitudinal filtering processing is carried out to effective current data segment；According to preset laterally filtering
Lower limit value carries out lateral filtering processing to the effective current data segment by being longitudinally filtered.It can be removed by above-mentioned processing
Interference therein, to be the operating current that current curve can really reflect breaker.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of application for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of flow chart of the current curve processing method of the operating current of breaker of the embodiment of the present application；
Fig. 2 is a kind of current curve schematic diagram of the operating current of breaker of the embodiment of the present application；
Fig. 3 is a kind of block diagram of the current curve processing unit of the operating current of breaker of the embodiment of the present application.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall in the protection scope of this application.
Embodiment one
Fig. 1 is a kind of flow chart of the current curve processing method of the operating current of breaker of the embodiment of the present application.
As shown in Figure 1, current curve processing method provided in this embodiment is used to pick up from the electricity of the operating current of breaker
Flow curve is handled, i.e., the data and curves for sample resulting current signal composition to current curve are handled, so as to
Interference therein is eliminated, which includes the following steps:
S1, part load calibration process is carried out to the current curve detected.
The divide-shut brake coil current signal of the collected breaker of high-voltage switch gear on-Line Monitor Device is uploaded to monitoring backstage
System, the signal is by the group of data points of many fixed sample rates at can draw out divide-shut brake coil current using these data points
Curve, the abscissa of current curve are the time, and ordinate is current value.
Some interference signals, such as biggish burr, or continuous small waveform have often been superimposed in current curve, this
A little interference signals make curve generate null offset sometimes, can also seriously affect the analysis to electromagnet characteristic, it is therefore necessary into
Row zero point correction, and filtered out from curve.
Firstly, traversing each data point on the current curve according to preset null offset limit value, obtain and zero point phase
Close all current values, then segment processing will be carried out close to the data of zero point in curve, as shown in Fig. 2, wherein before 5 and 6
Two segment datas later；Then average value processing is carried out to all data points in every section, two sections of mean value composition is calculated after processing
Straight line slope；Data all in this section are finally subtracted into the product of the mean value and slope, to realize zero point correction.
Null offset limit value in the present embodiment can calibration accuracy selection according to actual needs.
S2, the position for determining valid data in current curve, and determine effective current data segment.
The position for determining valid data in the current curve by zero point correction processing, according to the position of valid data from electricity
Effective current data segment is obtained in flow curve.
For the present embodiment, using the minimum value of preset magnet movement trigger current, a horizontal line y is drawn
=x, x are the minimum value of magnet movement trigger current, as shown in Fig. 2, intersect with current curve, can generate two intersection point x1 with
X2 searches the time point of x1 and x2 in all data points；According to time point x1, the x2 found, from x1 forward 5 direction look into
Small change point searches zero point from x2 to 6 direction, so that it is determined that 5 to 6 data segment section is effective current data segment.
S3, longitudinal filtering processing is carried out to effective current data segment.
It here is to be indulged according to preset longitudinal filtering upper limit value and longitudinal filtering lower limit value effective current data segment
To filtering processing.Concrete processing procedure is as follows:
For shown in Fig. 2, between 5 to 6 effective current data segment, since first point, while adjacent two are taken
The data of point carry out difference operation；If the difference of current value is less than filtering lower limit or difference is greater than the filtering upper limit, by phase
The value of 10 data points after the value and the value of the value previous data point of the value of data point in adjacent two current values rearward
Average value replacement.
S4, lateral filtering processing is carried out to effective current data segment.
It is horizontal for being carried out according to preset laterally filtering lower limit value to the effective current data segment by being longitudinally filtered
To filtering processing.Detailed process is as follows:
Difference operation is carried out to all adjacent two datas in effective current data segment, by each adjacent two data point
Difference forms new data sequence l；
In data sequence l, be grouped by positive negative, if in data sequence l, adjacent two data be all positive number or
Person is all negative, then assigns in same group；Otherwise it is divided into different groups, and the index of corresponding data point is stored in index
In sequence i.
Operation is carried out to the difference (i2-i1) of adjacent two data in index sequence i.
If difference is positive number and is less than laterally filtering lower limit, by the rope of data point d1 in data segment described in step C
The value for drawing data point identical with the value of i2 in index sequence i is substituted using the value of the data point before d1 data point.
If difference is negative and absolute value is less than laterally filtering lower limit, by data point in data segment described in step C
The value of the index of d1 data point identical with the value of i1 in index sequence i uses the value of the data point after d1 data point to substitute.
It can be seen from the above technical proposal that present embodiments providing at a kind of current curve of the operating current of breaker
Reason method, specially to detect current curve carry out zero point correction processing；Determine the current curve by zero point correction processing
The position of middle valid data obtains effective current data segment according to position from current curve；According in preset longitudinal filtering
Limit value and longitudinal filtering lower limit value carry out longitudinal filtering processing to effective current data segment；Lower limit value is laterally filtered according to preset
Lateral filtering processing is carried out to the effective current data segment by being longitudinally filtered.It can be removed by above-mentioned processing therein
Interference, to be the operating current that current curve can really reflect breaker.
Embodiment two
Fig. 3 is a kind of block diagram of the current curve processing unit of the operating current of breaker of the embodiment of the present application.
As shown in figure 3, current curve processing unit provided in this embodiment is used to pick up from the electricity of the operating current of breaker
Flow curve is handled, i.e., the data and curves for sample resulting current signal composition to current curve are handled, so as to
Interference therein is eliminated, which includes zero point correction module 10, data decimation module 20, longitudinal filtering mould
Block 30 and lateral filter module 40.
Zero point correction module is used to carry out part load calibration process to the current curve detected.
The divide-shut brake coil current signal of the collected breaker of high-voltage switch gear on-Line Monitor Device is uploaded to monitoring backstage
System, the signal is by the group of data points of many fixed sample rates at can draw out divide-shut brake coil current using these data points
Curve, the abscissa of current curve are the time, and ordinate is current value.
Some interference signals, such as biggish burr, or continuous small waveform have often been superimposed in current curve, this
A little interference signals make curve generate null offset sometimes, can also seriously affect the analysis to electromagnet characteristic, it is therefore necessary into
Row zero point correction, and filtered out from curve.
The module specifically includes data segmentation unit, the first computing unit and the second computing unit.Data segmentation unit is used
In traversing each data point on the current curve according to preset null offset limit value, obtain and all electric currents similar in zero point
Value, then segment processing will be carried out close to the data of zero point in curve, as shown in Fig. 2, wherein two number of segment before 5 and after 6
According to；First computing unit is used to carry out average value processing to all data points in every section, and two sections of mean value composition is calculated after processing
Straight line slope；Second computing unit is used to data all in this section subtracting the product of the mean value and slope, to realize
Zero point correction.
Null offset limit value in the present embodiment can calibration accuracy selection according to actual needs.
Data decimation module is used to determine the position of valid data in current curve, and determines effective current data segment.
The position for determining valid data in the current curve by zero point correction processing, according to the position of valid data from electricity
Effective current data segment is obtained in flow curve.
For the present embodiment, which includes that third computing unit, location lookup unit and data select unit.
Third computing unit is used for the minimum value using preset magnet movement trigger current, and drawing horizontal line a y=x, x is magnet
The minimum value of motion triggers electric current can generate two intersection points x1 and x2 as shown in Fig. 2, intersecting with current curve；Location lookup list
Member in all data points for searching the time point of x1 and x2；According to time point x1, the x2 found, from x1 forward 5 side
To zero point is searched, zero point is searched from x2 to 6 direction；Data select unit and are used to determine 5 to 6 data segment section for effectively electricity
Flow data section.
Longitudinal filter module is used to carry out effective current data segment longitudinal filtering processing.
It here is to be indulged according to preset longitudinal filtering upper limit value and longitudinal filtering lower limit value effective current data segment
To filtering processing.The module includes the 4th computing unit and the first substituting unit.
For shown in Fig. 2, the 4th computing unit is used between 5 to 6 effective current data segment, since first point,
The data of two adjacent points are taken to carry out difference operation simultaneously；Difference of first substituting unit for current value is less than under filtering
Limit or difference are greater than the filtering upper limit, then by the value of the data point in the two neighboring current value rearward previous data of the value
The average value replacement of the value of 10 data points after the value and the value of point.
Lateral filter module is used to carry out effective current data segment lateral filtering processing.
Specifically for according to preset laterally filtering lower limit value to by the effective current data segment that is longitudinally filtered into
Row laterally filtering processing.The module includes the 5th computing unit, data packet units, the 6th computing unit, the second substituting unit
With third substituting unit.
5th computing unit is used to carry out difference operation to all adjacent two datas in effective current data segment, will be every
The difference of adjacent two data point forms new data sequence l；
Data packet units are used in data sequence l, are grouped by positive negative, if in data sequence l, adjacent two
A data are all positive number or are all negative, then assign in same group；Otherwise it is divided into different groups, and by corresponding data point
Index be stored in index sequence i.
6th computing unit is used to carry out operation to the difference (i2-i1) of adjacent two data in index sequence i.
If the second substituting unit is positive number for difference and is less than laterally filtering lower limit, by data described in step C
The value of the index data point identical with the value of i2 in index sequence i of data point d1 uses the data point before d1 data point in section
Value substitution.
If third substituting unit is negative for difference and absolute value is less than laterally filtering lower limit, by institute in step C
The value for stating the data point identical with the value of i1 in index sequence i of the index of data point d1 in data segment uses after d1 data point
The value of data point substitutes.
It can be seen from the above technical proposal that present embodiments providing at a kind of current curve of the operating current of breaker
Manage device, specially to detect current curve carry out zero point correction processing；Determine the current curve by zero point correction processing
The position of middle valid data obtains effective current data segment according to position from current curve；According in preset longitudinal filtering
Limit value and longitudinal filtering lower limit value carry out longitudinal filtering processing to effective current data segment；Lower limit value is laterally filtered according to preset
Lateral filtering processing is carried out to the effective current data segment by being longitudinally filtered.It can be removed by above-mentioned processing therein
Interference, to be the operating current that current curve can really reflect breaker.
All the embodiments in this specification are described in a progressive manner, the highlights of each of the examples are with
The difference of other embodiments, the same or similar parts between the embodiments can be referred to each other.
It should be understood by those skilled in the art that, the embodiment of the embodiment of the present invention can provide as method, apparatus or calculate
Machine program product.Therefore, the embodiment of the present invention can be used complete hardware embodiment, complete software embodiment or combine software and
The form of the embodiment of hardware aspect.Moreover, the embodiment of the present invention can be used one or more wherein include computer can
With in the computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) of program code
The form of the computer program product of implementation.
The embodiment of the present invention be referring to according to the method for the embodiment of the present invention, terminal device (system) and computer program
The flowchart and/or the block diagram of product describes.It should be understood that flowchart and/or the block diagram can be realized by computer program instructions
In each flow and/or block and flowchart and/or the block diagram in process and/or box combination.It can provide these
Computer program instructions are set to general purpose computer, special purpose computer, Embedded Processor or other programmable data processing terminals
Standby processor is to generate a machine, so that being held by the processor of computer or other programmable data processing terminal devices
Capable instruction generates for realizing in one or more flows of the flowchart and/or one or more blocks of the block diagram
The device of specified function.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing terminal devices
In computer-readable memory operate in a specific manner, so that instruction stored in the computer readable memory generates packet
The manufacture of command device is included, which realizes in one side of one or more flows of the flowchart and/or block diagram
The function of being specified in frame or multiple boxes.
These computer program instructions can also be loaded into computer or other programmable data processing terminal devices, so that
Series of operation steps are executed on computer or other programmable terminal equipments to generate computer implemented processing, thus
The instruction executed on computer or other programmable terminal equipments is provided for realizing in one or more flows of the flowchart
And/or in one or more blocks of the block diagram specify function the step of.
Although the preferred embodiment of the embodiment of the present invention has been described, once a person skilled in the art knows bases
This creative concept, then additional changes and modifications can be made to these embodiments.So the following claims are intended to be interpreted as
Including preferred embodiment and fall into all change and modification of range of embodiment of the invention.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that process, method, article or terminal device including a series of elements not only wrap
Those elements are included, but also including other elements that are not explicitly listed, or further includes for this process, method, article
Or the element that terminal device is intrinsic.In the absence of more restrictions, being wanted by what sentence "including a ..." limited
Element, it is not excluded that there is also other identical elements in process, method, article or the terminal device for including the element.
Technical solution provided by the present invention is described in detail above, specific case used herein is to this hair
Bright principle and embodiment is expounded, method of the invention that the above embodiments are only used to help understand and its
Core concept；At the same time, for those skilled in the art, according to the thought of the present invention, in specific embodiment and application
There will be changes in range, in conclusion the contents of this specification are not to be construed as limiting the invention.
Claims (10)
1. a kind of current curve processing method of the operating current of breaker, which is characterized in that comprising steps of
To detect current curve carry out zero point correction processing；
The position for determining valid data in the current curve by zero point correction processing, according to the position from the current curve
Middle acquisition effective current data segment；
Longitudinal filtering is carried out to the effective current data segment according to preset longitudinal filtering upper limit value and longitudinal filtering lower limit value
Processing；
Lateral filter is carried out to by the effective current data segment being longitudinally filtered according to preset laterally filtering lower limit value
Wave processing.
2. current curve processing method as described in claim 1, which is characterized in that described pair detects that current curve carries out zero
Point calibration process, comprising:
Each data point on the current curve is traversed according to preset null offset limit value, is obtained and institute similar in zero point
There is current value, and carries out data sectional；
Calculate the average value of all data in each described segmentation；
Difference operation is carried out to all data in corresponding segmentation according to each average value.
3. current curve processing method as described in claim 1, which is characterized in that the determination is by zero point correction processing
The position of valid data in current curve obtains effective current data segment according to the position from the current curve, comprising:
According to the minimum value x of preset magnet movement trigger current, the straight line of y=x is drawn in the coordinate system of the current curve,
The straight line, which is generated, generates two crosspoints, respectively the first crosspoint and the second crosspoint with the current curve；
Along the first zero position of the first crosspoint Look-ahead data, number is searched backward along second crosspoint
According to the second dead-center position；
The curve on the current curve between the first zero position and second dead-center position will be taken to be chosen to be
The effective current data segment.
4. current curve processing method as described in claim 1, which is characterized in that described according to preset longitudinal filtering upper limit
Value and longitudinal filtering lower limit value carry out longitudinal filtering processing to the effective current data segment, comprising:
Calculate the difference of the current value of all adjacent two o'clocks in the effective current data segment；
If the difference, which is less than longitudinal filtering lower limit value or is greater than the longitudinal direction, filters upper limit value, by adjacent two o'clock
Its previous current value of the current value of middle later point and the average value of multiple current values thereafter replace.
5. current curve processing method as described in claim 1, which is characterized in that described laterally to filter lower limit according to preset
Value carries out lateral filtering processing to by the effective current data segment being longitudinally filtered, comprising:
Calculate the current differential of the current value of all adjacent two o'clocks in the effective current data segment, obtained multiple current differences
Value constitutes data sequence d；
If two neighboring current differential is all positive number or is all negative in the data sequence, assign in first group, it is no
It then assigns in second group, and the index of corresponding current differential is stored as index sequence i；
Calculate the data difference to adjacent two data in the index sequence；
If the data difference is positive number and is less than the laterally filtering lower limit value, data in the effective current data segment
The value of the index data point identical with the value of i2 in the index sequence i of point d1 uses the value of the data point before data point d1
Substitution；
If the data difference is negative and its absolute value is less than the laterally filtering lower limit value, by the effective current number
The data after data point d1 are used according to the value of the data point identical with the value of i1 in index sequence i of the index of data point d1 in section
The value substitution of point.
6. a kind of current curve processing unit of the operating current of breaker characterized by comprising
Zero point correction module, for detect current curve carry out zero point correction processing；
Data decimation module, for determining the position of valid data in the current curve by zero point correction processing, according to described
Position obtains effective current data segment from the current curve；
Longitudinal filter module, for filtering upper limit value and longitudinal filtering lower limit value to the effective current number according to preset longitudinal direction
Longitudinal filtering processing is carried out according to section；
Lateral filter module, for filtering lower limit value to by the effective current being longitudinally filtered according to preset transverse direction
Data segment carries out lateral filtering processing.
7. current curve processing unit as claimed in claim 6, which is characterized in that the zero point correction module includes:
Data segmentation unit, for traversing each data point on the current curve according to preset null offset limit value,
Acquisition and all current values similar in zero point, and carry out data sectional；
First computing unit, for calculating the average value of all data in each described segmentation；
Second computing unit, for carrying out difference operation to all data in corresponding segmentation according to each average value.
8. current curve processing unit as claimed in claim 6, which is characterized in that the data decimation module includes:
Third computing unit, for the minimum value x according to preset magnet movement trigger current, in the coordinate of the current curve
Draw the straight line of y=x in system, the straight line, which is generated, generates two crosspoints with the current curve, respectively the first crosspoint and
Second crosspoint；
Location lookup unit, for the first zero position along the first crosspoint Look-ahead data, along described
The second dead-center position of data is searched backward in two crosspoints；
Data select unit, for that will take on the current curve between the first zero position and second dead-center position
Between curve be chosen to be the effective current data segment.
9. current curve processing unit as claimed in claim 6, which is characterized in that it is described longitudinal direction filter module include:
4th computing unit, for calculating the difference of the current value of all adjacent two o'clocks in the effective current data segment；
First substituting unit, if being less than longitudinal filtering lower limit value for the difference or being greater than longitudinal filtering
Limit value then takes the current value of later point in adjacent two o'clock with the average value of its previous current value and multiple current values thereafter
Generation.
10. current curve processing unit as claimed in claim 6, which is characterized in that it is described transverse direction filter module include:
5th computing unit, for calculating the current differential of the current value of all adjacent two o'clocks in the effective current data segment,
Obtained multiple current differentials constitute data sequence d；
Data packet units, if being all positive number for two neighboring current differential in the data sequence or being all negative,
It then assigns in first group, otherwise assigns in second group, and the index of corresponding current differential is stored as index sequence I；
6th computing unit, for calculating the data difference to adjacent two data in the index sequence；
Second substituting unit, it is described to have if being positive number for the data difference and being less than the laterally filtering lower limit value
The value for imitating the index data point identical with the value of i2 in the index sequence i of data point d1 in current data section uses data point
The value of data point before d1 substitutes；
Third substituting unit, if be used for, the data difference is negative and its absolute value is less than the laterally filtering lower limit value,
Then the value of the index of data point d1 in effective current data segment data point identical with the value of i1 in index sequence i is used
The value of data point after data point d1 substitutes.
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