CN107370114B - The setting method and device of current quick definite value - Google Patents
The setting method and device of current quick definite value Download PDFInfo
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- CN107370114B CN107370114B CN201710693656.XA CN201710693656A CN107370114B CN 107370114 B CN107370114 B CN 107370114B CN 201710693656 A CN201710693656 A CN 201710693656A CN 107370114 B CN107370114 B CN 107370114B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/006—Calibration or setting of parameters
Abstract
The invention belongs to electric network protection technical fields; more particularly to the setting method and device of current quick definite value, comprising: obtaining recorded wave file described in the position of each wave recording device and the recorded wave file of each wave recording device record is the file that wave recording device is generated when feeder line where the wave recording device breaks down；Generation time based on the recorded wave file and record the recorded wave file wave recording device position, calculate the weight coefficient of recorded wave file；According to the weight coefficient of each recorded wave file; data in each recorded wave file are weighted; generate protection definite value; the protection definite value is the current limit value of power distribution network safe operation; recorded wave file is more fully analyzed with realizing; improve the accuracy for protecting fixed value calculation and the degree of automation and power distribution network reliability of operation.
Description
Technical field
The invention belongs to the setting methods and device of electric network protection technical field more particularly to current quick definite value.
Background technique
Power distribution network is the critical network realizing electric energy and transporting from power station to huge numbers of families, wherein power distribution network is by one
Feeder line composition, multiple breakers are dispersed on each feeder line.It is well known that power distribution network is during transmitting electric energy, it can
Various failures, such as three-phase shortcircuit, two-phase short circuit etc. can occur, these failures often will cause the damage of equipment or feeder line,
Great property loss is caused to society.In order to avoid the equipment damage as caused by feeder fault, currently, people are on feeder line
It is mounted with some wave recording devices, for collecting circuit data when failure occurs, and calculates protection based on these circuit datas and determine
Value, when some parameters on feeder line are when reaching the parameter corresponding protection definite value, relevant adjusting breaker will be automatic
It disconnects, to avoid the damage of Distribution Network Equipment while guaranteeing that other feeder lines operate normally.
However it is current, the adjusting of power distribution network current quick definite value can only rely on the experience of engineer, subjectively carry out
Artificial setting, and currently setting protection definite value often only considers recording wave device recorded data, such as voltage or electric current, and
Have ignored other factors.So there are standard disunity, meters for the setting method of current power distribution network current quick definite value
The problem of the protection definite value accuracy deficiency of calculation, often occurs that some parameters are exceeded on feeder line, but adjusts breaker and do not have
There is the phenomenon that disconnection, Distribution Network Equipment is caused to damage.
Summary of the invention
In view of this, the embodiment of the invention provides the setting method of current quick definite value and device, it is existing to solve
There is the problem of the adjusting accuracy difference of current quick definite value.
The first aspect of the embodiment of the present invention provides a kind of setting method of current quick definite value, comprising: obtains
The recorded wave file of the position of each wave recording device and each wave recording device record, the recorded wave file are wave recording device in the record
The recorded wave file generated when three phase short circuit fault occurs for feeder line where wave apparatus；Generation time based on the recorded wave file and
The position for recording the wave recording device of the recorded wave file calculates the weight coefficient of recorded wave file；According to the power of selected recorded wave file
Weight coefficient, is weighted the data in each recorded wave file, adjusting protection definite value, and the current quick is fixed
Value is three phase short circuit fault current limit value under distribution network line maximum operational mode.
The second aspect of the embodiment of the present invention provides a kind of setting device of current quick definite value, comprising:
Module is obtained, for obtaining the position of each wave recording device and the recorded wave file of each wave recording device record, institute
Stating recorded wave file is the recorded wave file that wave recording device is generated when three phase short circuit fault occurs for feeder line where the wave recording device；It calculates
Module calculates record for the generation time based on the recorded wave file and the position for the wave recording device for recording the recorded wave file
The weight coefficient of wave file；Generation module, for the weight coefficient according to selected recorded wave file, to each recorded wave file
In data be weighted, adjusting protection definite value, rate of current protection definite value is distribution network line maximum operation side
Three phase short circuit fault current limit value under formula.
The third aspect of the embodiment of the present invention provides a kind of setting device of current quick definite value, comprising: storage
Device, processor and storage are in the memory and the computer program that can run on the processor, which is characterized in that
The processor is realized when executing the computer program such as the step of any one of claim 1 to 5 the method.
The fourth aspect of the embodiment of the present invention provides a kind of computer readable storage medium, the computer-readable storage
Media storage has computer program, which is characterized in that when the computer program is executed by processor realize as claim 1 to
The step of any one of 5 the method.
Existing beneficial effect is the embodiment of the present invention compared with prior art: by the position according to each wave recording device
And the generation time of recorded wave file, calculate the weight coefficient of each recorded wave file, and the weight based on each recorded wave file
The current value in the corresponding recorded wave file of each wave recording device is weighted in coefficient, protection definite value is generated, with realization pair
Recorded wave file is more fully analyzed, and what the accuracy and the degree of automation and power distribution network of raising protection fixed value calculation were run can
By property.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the implementation flow chart of the setting method of current quick definite value provided in an embodiment of the present invention；
Fig. 2 is the specific implementation flow of the setting method S102 of current quick definite value provided in an embodiment of the present invention
Figure；
Fig. 3 is the specific implementation flow of the setting method S103 of current quick definite value provided in an embodiment of the present invention
Figure；
Fig. 4 is the structural block diagram of the setting device of current quick definite value provided in an embodiment of the present invention；
Fig. 5 is the schematic diagram of the setting device of current quick definite value provided in an embodiment of the present invention.
Specific embodiment
In being described below, for illustration and not for limitation, the tool of such as particular system structure, technology etc is proposed
Body details, to understand thoroughly the embodiment of the present invention.However, it will be clear to one skilled in the art that there is no these specific
The present invention also may be implemented in the other embodiments of details.In other situations, it omits to well-known system, device, electricity
The detailed description of road and method, in case unnecessary details interferes description of the invention.
In order to illustrate technical solutions according to the invention, the following is a description of specific embodiments.
Fig. 1 shows the implementation process of the setting method of current quick definite value provided in an embodiment of the present invention, is described in detail
It is as follows:
In S101, recording described in the position of each wave recording device and the recorded wave file of each wave recording device record is obtained
File is the recorded wave file that wave recording device is generated when three phase short circuit fault occurs for feeder line where the wave recording device.
In embodiments of the present invention, it in order to realize the safe operation of power distribution network, needs to carry out the parameters of power distribution network
Record, therefore wave recording device is mounted on each feeder line of power distribution network, these wave recording devices are used to record every ginseng of feeder line
The duration etc. that breaker disconnects after number, such as electric current, voltage and failure generation.It is to be appreciated that in embodiments of the present invention,
The main current data using wave recording device record.
In embodiments of the present invention, when occurring the failure for causing breaker to disconnect, wave recording device just generates a record
Wave file, this recorded wave file store the current data before failure occurs in preset time period, in these preset time periods
Current data can be used as the subsequent reference frame for calculating protection definite value.Break after failure occurs it is to be appreciated that protection definite value refers to
The limiting value of feeder line parameter required for road device disconnects, in embodiments of the present invention, protection definite value are that related adjusting breaker is disconnected
When opening, the current maxima of the feeder line.
Optionally, for the more scientific various parameters comprehensively recorded on a feeder line, the embodiment of the present invention is at one
No less than 3 wave recording devices are installed on feeder line.Optionally, one recording dress is respectively installed in the head end of feeder line and end
It sets, at least one wave recording device is installed from first breaker between the 40%-70% of last breaker length in a feeder line.
It is to be appreciated that the embodiment of the present invention is not merely to be carried out according to the current value of wave recording device record to current quick-breaking
Protect the adjusting of definite value, it is also necessary to obtain the position of each wave recording device, and according to the position of each wave recording device and recording
The time of file generated judges the importance of data in a wave recording device.
In S102, generation time based on the recorded wave file and record the recorded wave file wave recording device position
It sets, calculates the weight coefficient of recorded wave file.
It is to be appreciated that the importance due to different wave recording devices is different, when definite value is protected in subsequent calculating, no
The weight of parameter in same recorded wave file is also just different.In embodiments of the present invention, by each recording for recording recorded wave file
The dimension that the position of device is measured as an importance, it is heavy as another by the generation time of each recording recorded wave file
The dimension that the property wanted is measured, so that it is determined that the significance level of each recorded broadcast device, and be different wave recording devices based on significance level
Assign weight coefficient.
Fig. 2 shows the specific implementation streams of the setting method S102 of current quick definite value provided in an embodiment of the present invention
Journey, details are as follows:
In S201, in two breakers adjacent with the wave recording device, a breaker is selected to fill as the recording
Set corresponding adjusting breaker, the open circuit that feeder line section of the adjusting breaker where wave recording device is disconnected in current overload
Device.
In S202, at a distance from corresponding adjusting breaker, accounts for and filled with the recording with the wave recording device according to wave recording device
The ratio for setting the distance of two adjacent breakers generates the position related coefficient of the recorded wave file of wave recording device record.
It is to be appreciated that as described above, between the breaker two-by-two on each feeder line, all there is at least three recording
Device breaks down at a feeder line section (i.e. line segment on a feeder line between two breakers), causes the feeder line section electric current super
When overprotection definite value, a breaker is only had in two breakers in the feeder line section and is disconnected, the breaker of the disconnection is exactly whole
Determine breaker.
In embodiments of the present invention, system is stored with each wave recording device at a distance from adjacent adjusting breaker, and
The distance between breaker two-by-two, therefore wave recording device can be calculated at a distance from adjacent adjusting breaker, account for adjacent two
The ratio of the distance of breaker, in embodiments of the present invention, using this ratio as position related coefficient.It is to be appreciated that
Remoter from adjusting breaker in power distribution network, the parameter of wave recording device record is just more stable, the importance in subsequent calculating
It is bigger.
In S203, according to the generation time of the recorded wave file, the time correlation coefficient of recorded wave file is calculated.
As described above, when occurring the failure for causing breaker to disconnect, wave recording device just generates a recorded wave file,
This recorded wave file stores the current data before failure occurs in preset time period.It is to be appreciated that in each wave recording device
As soon as the time that the recorded wave file ultimately produced generates is more early, the recorded wave file is lower to current reference significance, therefore should
The corresponding time correlation coefficient of wave recording device is with regard to smaller；Conversely, the recorded wave file ultimately produced in each wave recording device is raw
At time it is more late, the recorded wave file is bigger to current reference significance, therefore the corresponding time correlation system of the wave recording device
Number is bigger, and time correlation coefficient is directly proportional to the generation time of the recorded wave file.
Optionally, the corresponding time correlation coefficient of recorded wave file that this month generates is set as 1, the month that recorded wave file generates
Per 1 month forward, then time correlation coefficient reduced by 0.1.Optionally, a minimum value is set for time correlation coefficient, such as
0.6.I.e. when the generation time of recorded wave file was earlier than 4 months, time correlation coefficient also no longer reduces.
Optionally, the corresponding time correlation coefficient of recorded wave file that this day generates is set as 1, the date that recorded wave file generates
Per 1 day forward, then time correlation coefficient reduced by 0.01.Optionally, the minimum value of time correlation coefficient is set as 0.
It is to be appreciated that time interval of the generation time of recorded wave file to current time, with time correlation coefficient at negative
Correlativity.
In S204, the weighted average of the position related coefficient and the time correlation coefficient of recorded wave file is calculated
Value, the weight coefficient as the recorded wave file.
Optionally, determine position related coefficient and time correlation coefficient in weighted average calculation according to different situations
Weight.It is to be appreciated that for example, time correlation coefficient S works as position if the position related coefficient of a wave recording device is W
When the weight of related coefficient and time correlation coefficient is all 0.5, the weight coefficient of recorded wave file is (W+S)/2.When position correlation
The weight of coefficient is 1/3, and the weight of time correlation coefficient is 2/3, then the weight coefficient of recorded wave file is 1/3W+2/3S.
In S103, according to the weight coefficient of selected recorded wave file, the data in each recorded wave file are carried out
Weighted calculation, adjusting protection definite value, the current quick definite value is three-phase shortcircuit under distribution network line maximum operational mode
Fault current limiting value.
Optionally, in embodiments of the present invention, it is fixed as subsequent calculating protection to choose the current value recorded in recorded wave file
The parameter of value.
It is to be appreciated that as described above, different wave recording devices is according to position difference, and the record being newly generated
The generation time of wave file is different, protects importance when definite value also different calculating.
Fig. 3 shows the specific implementation stream of the setting method S103 of current quick definite value provided in an embodiment of the present invention
Journey, details are as follows:
In S301, the initial value of preset protection definite value is obtained.
Optionally, in embodiments of the present invention, protection definite value is updated repeatedly by iterating to calculate.It is to be appreciated that repeatedly
In generation, needs to have two parameters in calculating, and one is initial value the other is the check value recycled.Therefore in the embodiment of the present invention
In, it can choose any one initial value of number as protection definite value, in order to reduce the number of words of iterative calculation, engineer answers root
According to the data and correlation experience of historical protective definite value, select an ideal numerical value as the first of preset protection definite value
Initial value.
In S302, according to the current waveform in each recorded wave file, the current characteristic of each recorded wave file is calculated
Value, the current characteristic number are used to react the feature of the current waveform in the recorded wave file.
As described above, describe many kinds of parameters in recorded wave file, for example, electric current, voltage and failure occur after breaker
The parameters such as the duration of disconnection.In embodiments of the present invention, according to the current waveform in recorded wave file, each wave recording device pair is calculated
The current characteristic number in recorded wave file answered.It is to be appreciated that the current waveform in recorded wave file includes multiple discrete electric currents
The corresponding relationship of value and moment value.
Further, the current waveform in recorded wave file in preset time period is obtained.
It is to be appreciated that since the current waveform in the embodiment of the present invention is made of discrete current impulse, root
Current waveform before disconnecting according to breaker in preset time period, can read corresponding current value at the time of each acquisition data
Size.
Further, in the current waveform in the preset time period, the maximum current value of preset quantity is chosen, and
Calculate mean value, the current characteristic number as recorded wave file.
It optionally, in embodiments of the present invention, is not to select a current value as recorded wave file in current waveform
Current characteristic number, but calculate their average value conduct after several maximum current values before selecting in current waveform
Current characteristic number in the corresponding recorded wave file of the wave recording device.
It is to be appreciated that by the maximum preset quantity current value interior for the previous period for choosing failure, and calculate it
Average value statistics difference can be eliminated using the current characteristic number as recorded wave file, and reduce since failure leads to electricity
Flow the influence to increase sharply.
In S303, the current characteristic number of each recorded wave file and the difference of protection definite value are calculated, as each record
The opposite correction value of the protection definite value of wave file.
As described above, by calculating in the current waveform in preset time period, the maximum current value of preset quantity
Mean value, the current value in available recorded wave file.It is to be appreciated that each recorded wave file corresponds to a current characteristic number.
In this step, the difference of calculating current characteristic value and current protection definite value is as the opposite correction value for protecting definite value, can be with
Understand ground, the opposite correction value of the corresponding protection definite value of each recorded wave file.
It is to be appreciated that the process of a continuous renewal is custom made with due to protecting, in the wheel of different cycle calculations
In secondary, the opposite correction value of the corresponding protection definite value of the same recorded wave file is all different.
In S304, according to the weight coefficient of the recorded wave file, to the phase of the protection definite value of each recorded wave file
Calculating is weighted and averaged to correction value, generates the correction value of protection definite value.
According to the method described above, the protection of the weight coefficient of available recorded wave file and each recorded wave file
The opposite correction value of definite value, it is in this step, the opposite correction value of the protection definite value of each recorded wave file is corresponding according to its
Weight coefficient is weighted and averaged calculating, generates the correction value of the protection definite value of whole system.It is to be appreciated that this step
The correction value of protection definite value refers to the average weighted difference of the data of all record device records in protection definite value and whole system
Value.
In S305, the difference for the weight coefficient for subtracting the recorded wave file for 1, the second weight as the recorded wave file
Coefficient, and according to the second weight coefficient of recorded wave file, the current characteristic number of each recorded wave file is weighted and averaged
It calculates, generates fixed value checking value.
For example, the weight coefficient of recorded wave file 1 is w, then the second weight coefficient of recorded wave file 1 is 1-w.Of the invention real
It applies in example, calculating is weighted and averaged to current characteristic number out calculated above based on the second weight coefficient, to generate definite value school
Test value.
In S306, the ratio of the fixed value checking value and the protection definite value is calculated, as sensitivity.
For example, the fixed value checking value of recorded wave file 1 is J, current protection definite value is S, then sensitivity is J/S.It is worth note
There is the process being cyclically updated on meaning ground, in embodiments of the present invention, protection definite value, therefore current definite value of protecting not is not
Become.
In S307, if the sensitivity is greater than the preset threshold of sensitivity, the correction value based on the protection definite value
Protection definite value is updated, and returns and executes the difference for calculating each current characteristic number and protection definite value, as each record
The operation of the opposite correction value of the protection definite value of wave file.
It is to be appreciated that this step is the step of realizing cycle calculations.By by it is calculated above go out sensitivity with one
The preset threshold of sensitivity is compared, and decides whether to return to the execution " current characteristic number of each recorded wave file of calculating
With the difference of protection definite value, the opposite correction value of the protection definite value as each recorded wave file " the step of, to complete circulation meter
It calculates.
It is to be appreciated that then proving that the value of protection definite value is quasi- not enough when sensitivity is greater than the preset threshold of sensitivity
Really, may be higher or relatively low, this actual to power distribution network can be impacted using safe or normal operation, then need a new wheel
Cycle calculations are updated protection definite value.
Further, if the sensitivity is greater than preset difference threshold, the amendment based on the protection definite value
Value updates protection definite value, comprising: the sum of the correction value for calculating current protection definite value and the protection definite value, as updated
Protect definite value.
It is to be appreciated that in each round cycle calculations, other than calculating the correction value of protection definite value, it is also necessary to guarantor
Shield customization is updated.Optionally, in embodiments of the present invention, by by the correction value of current protection definite value and protection definite value
It is added summation, by the sum of the correction value of current protection definite value and current protection definite value, as updated protection definite value.
In S308, if the sensitivity is less than or equal to the preset threshold of sensitivity, terminate to the protection definite value
Update.
It is to be appreciated that the embodiment of the present invention is continuously updated protection definite value and sensitivity, works as spirit by cycle calculations
When sensitivity is less than or equal to the preset threshold of sensitivity, then prove that protection customization at this time is satisfactory.
It is to be appreciated that we fill not only according to recorded wave file recorded data also according to recording by the above method
The generation time for setting position and recorded wave file has calculated the reference importance of each recorded wave file internal data, and
In this, as the foundation for updating protection definite value, after cycle calculations, obtained most suitable power distribution network be selected part protection it is fixed
Value improves the accuracy of protection fixed value calculation and the reliability of power distribution network work.
Corresponding to localization method above, Fig. 4 shows the whole of current quick definite value provided in an embodiment of the present invention
Determine the structural block diagram of device.
Referring to Fig. 4, which includes:
Module 401 is obtained, for obtaining the position of each wave recording device and the recorded wave file of each wave recording device record
The recorded wave file is the recorded wave file that wave recording device is generated when three phase short circuit fault occurs for feeder line where the wave recording device；
Computing module 402 is filled for the generation time based on the recorded wave file and the recording for recording the recorded wave file
The position set calculates the weight coefficient of recorded wave file；
Generation module 403, for the weight coefficient according to selected recorded wave file, to the number in each recorded wave file
According to being weighted, adjusting protection definite value, the current quick definite value is three under distribution network line maximum operational mode
Phase short-circuit current limiting value.
Further, computing module includes:
Chosen module, for selecting a breaker as the record in two breakers adjacent with the wave recording device
The corresponding adjusting breaker of wave apparatus, the adjusting breaker are that the feeder line section where wave recording device is disconnected in current overload
Breaker；
First coefficient computational submodule, for according to wave recording device it is corresponding with the wave recording device adjusting breaker away from
From, account for the ratio at a distance from two breakers adjacent with the wave recording device, generate the wave recording device record recorded wave file position
Set related coefficient；
Second coefficient computational submodule calculates the time of recorded wave file for the generation time according to the recorded wave file
Related coefficient；
Third coefficient computational submodule, for calculate recorded wave file the position related coefficient and the time correlation system
Several weighted averages, the weight coefficient as the recorded wave file.
Further, generation module includes:
Initial value sets submodule, for obtaining the initial value of preset protection definite value；
Electric current computational submodule, for calculating each recorded wave file according to the current waveform in each recorded wave file
Current characteristic number, the current characteristic number is used to react the feature of current waveform in the recorded wave file；
Difference computational submodule, for calculating the current characteristic number of each recorded wave file and the difference of protection definite value,
Opposite correction value as each recorded wave file protection definite value；
Difference computational submodule, for the weight coefficient according to the recorded wave file, to the guarantor of each recorded wave file
The opposite correction value of shield definite value is weighted and averaged calculating, generates the correction value of protection definite value；
Check value computational submodule, the difference of the weight coefficient for subtracting the recorded wave file by 1, as recording text
Second weight coefficient of part, and according to the second weight coefficient of recorded wave file, to the current characteristic number of each recorded wave file
It is weighted and averaged calculating, generates fixed value checking value；
Calculation of Sensitivity submodule, for calculating the ratio of the fixed value checking value and the protection definite value, as sensitive
Degree；
First implementation sub-module, it is fixed based on the protection if being greater than the preset threshold of sensitivity for the sensitivity
The correction value of value updates protection definite value, and returns and execute the difference for calculating each current characteristic number and protection definite value,
The operation of the opposite correction value of protection definite value as each recorded wave file；
Second implementation sub-module terminates if being less than or equal to the preset threshold of sensitivity for the sensitivity to institute
State the update of protection definite value.
Further, the electric current computational submodule, is specifically used for:
Obtain the current waveform in recorded wave file in preset time period；
In the current waveform in the preset time period, the maximum current value of preset quantity is chosen, and calculate mean value,
Current characteristic number as recorded wave file.
Further, first implementation sub-module, is specifically used for:
The sum of the correction value for calculating current protection definite value and the protection definite value, as updated protection definite value.
Fig. 5 is the schematic diagram of the setting device for the current quick definite value that one embodiment of the invention provides.Such as Fig. 5 institute
Show, the setting device of the current quick definite value of the embodiment includes: processor 50, memory 51 and is stored in described deposit
In reservoir 51 and the computer program 52 that can be run on the processor 50, such as the adjusting journey of current quick definite value
Sequence.The processor 50 realizes that the setting method of above-mentioned each current quick definite value is real when executing the computer program 52
Apply the step in example, such as step S101 to S103 shown in FIG. 1.Alternatively, the processor 50 executes the computer program
The function of each module/unit in above-mentioned each Installation practice, such as the function of module 401 to 403 shown in Fig. 4 are realized when 52.
Illustratively, the computer program 52 can be divided into one or more module/units, it is one or
Multiple module/units are stored in the memory 51, and are executed by the processor 50, to complete the present invention.Described one
A or multiple module/units can be the series of computation machine program instruction section that can complete specific function, which is used for
Implementation procedure of the computer program 52 in the setting device 5 of the current quick definite value is described.
The setting device 5 of the current quick definite value can be desktop PC, notebook, palm PC and cloud
Server etc. is held to calculate equipment.Setting device/device of the current quick definite value may include, but be not limited only to, processing
Device 50, memory 51.It will be understood by those skilled in the art that Fig. 5 is only showing for the setting device 5 of current quick definite value
Example, does not constitute the restriction to the setting device 5 of current quick definite value, may include than illustrating more or fewer portions
Part perhaps combines certain components or different components, such as the setting device of the current quick definite value can also wrap
Include input-output equipment, network access equipment, bus etc..
Alleged processor 50 can be central processing unit (Central Processing Unit, CPU), can also be
Other general processors, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor or the processor is also possible to any conventional processor
Deng.
The memory 51 can be the internal storage unit of the setting device of the current quick definite value, such as electricity
Flow the hard disk or memory of the setting device 5 of fast tripping protection definite value.It is fixed that the memory 51 is also possible to the current quick
Match on the External memory equipment of setting device/device 5 of value, such as setting device/device 5 of the current quick definite value
Standby plug-in type hard disk, intelligent memory card (Smart Media Card, SMC), secure digital (Secure Digital, SD)
Card, flash card (Flash Card) etc..Further, the memory 51 can also both include the current quick definite value
The internal storage unit of setting device/device 5 also include External memory equipment.The memory 51 is for storing the calculating
Other programs and data needed for setting device/device of machine program and the current quick definite value.The memory
51 can be also used for temporarily storing the data that has exported or will export.Those skilled in the art can be clearly
Recognize, for convenience of description and succinctly, is only carried out with the division of above-mentioned each functional unit, module for example, actually answering
In, it can according to need and complete above-mentioned function distribution by different functional units, module, i.e., by the inside of described device
Structure is divided into different functional unit or module, to complete all or part of the functions described above.It is each in embodiment
Functional unit, module can integrate in one processing unit, are also possible to each unit and physically exist alone, can also be two
Or more than two units are integrated in one unit, above-mentioned integrated unit both can take the form of hardware realization, can also be with
It realizes in the form of software functional units.In addition, the specific name of each functional unit, module is also only to facilitate mutual area
Point, the protection scope being not intended to limit this application.The specific work process of unit in above system, module, before can referring to
The corresponding process in embodiment of the method is stated, details are not described herein.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in detail or remembers in some embodiment
The part of load may refer to the associated description of other embodiments.
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician
Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed
The scope of the present invention.
In embodiment provided by the present invention, it should be understood that disclosed device/device and method can pass through
Other modes are realized.For example, device/Installation practice described above is only schematical, for example, the module or
The division of unit, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units
Or component can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, institute
Display or the mutual coupling or direct-coupling or communication connection discussed can be through some interfaces, device or unit
INDIRECT COUPLING or communication connection can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated module/unit be realized in the form of SFU software functional unit and as independent product sale or
In use, can store in a computer readable storage medium.Based on this understanding, the present invention realizes above-mentioned implementation
All or part of the process in example method, can also instruct relevant hardware to complete, the meter by computer program
Calculation machine program can be stored in a computer readable storage medium, the computer program when being executed by processor, it can be achieved that on
The step of stating each embodiment of the method.Wherein, the computer program includes computer program code, the computer program
Code can be source code form, object identification code form, executable file or certain intermediate forms etc..Computer-readable Jie
Matter may include: can carry the computer program code any entity or device, recording medium, USB flash disk, mobile hard disk,
Magnetic disk, CD, computer storage, read-only memory (ROM, Read-Only Memory), random access memory (RAM,
Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium etc..It should be noted that described
The content that computer-readable medium includes can carry out increasing appropriate according to the requirement made laws in jurisdiction with patent practice
Subtract, such as does not include electric carrier signal and electricity according to legislation and patent practice, computer-readable medium in certain jurisdictions
Believe signal.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although referring to aforementioned reality
Applying example, invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features；And these are modified
Or replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution should all
It is included within protection scope of the present invention.
Claims (6)
1. a kind of setting method of current quick definite value characterized by comprising
The position of each wave recording device and the recorded wave file of each wave recording device record are obtained, the recorded wave file is recording dress
Set the recorded wave file generated when three phase short circuit fault occurs for feeder line where the wave recording device；
Generation time based on the recorded wave file and record the recorded wave file wave recording device position, calculate recorded wave file
Weight coefficient；
According to the weight coefficient of selected recorded wave file, the data in each recorded wave file are weighted, are adjusted
Definite value is protected, the current quick definite value is three phase short circuit fault current limitation under distribution network line maximum operational mode
Value；
The position of the generation time and the wave recording device for recording the recorded wave file based on the recorded wave file calculates recording
The weight coefficient of file, comprising:
In two breakers adjacent with the wave recording device, select a breaker disconnected as the corresponding adjusting of the wave recording device
Road device, the breaker that feeder line section of the adjusting breaker where wave recording device is disconnected in current overload；
According to the distance of the corresponding adjusting breaker of wave recording device, the ratio at a distance from two adjacent breakers is accounted for, generating should
The position related coefficient of the recorded wave file of wave recording device record；
According to the generation time of the recorded wave file, the time correlation coefficient of recorded wave file is calculated；
The weighted average for calculating the position related coefficient and the time correlation coefficient of recorded wave file, as recording text
The weight coefficient of part；
The weight coefficient of the selected recorded wave file of the basis, is weighted the data in each recorded wave file,
Adjusting protection definite value, comprising:
Obtain the initial value of preset protection definite value；
According to the current waveform in each recorded wave file, the current characteristic number of each recorded wave file is calculated, the electric current is special
Value indicative is used to react the feature of the current waveform in the recorded wave file；
The current characteristic number of each recorded wave file and the difference of protection definite value are calculated, the protection as each recorded wave file is fixed
The opposite correction value of value；
According to the weight coefficient of the recorded wave file, the opposite correction value of the protection definite value of each recorded wave file is added
Weight average calculates, and generates the correction value of protection definite value；
The difference for the weight coefficient for subtracting the recorded wave file for 1, as the second weight coefficient of the recorded wave file, and according to record
Second weight coefficient of wave file is weighted and averaged calculating to the current characteristic number of each recorded wave file, generates definite value
Check value；
The ratio for calculating the fixed value checking value and the protection definite value, as sensitivity；
If the sensitivity is greater than the preset threshold of sensitivity, the correction value based on the protection definite value updates protection definite value,
And return and execute the difference for calculating each current characteristic number and protection definite value, the protection as each recorded wave file is fixed
The operation of the opposite correction value of value；
If the sensitivity is less than or equal to the preset threshold of sensitivity, terminate the update to the protection definite value.
2. the setting method of current quick definite value as described in claim 1, which is characterized in that described according to each described
Current waveform in recorded wave file calculates the current characteristic number of each recorded wave file, comprising:
Obtain the current waveform in recorded wave file in preset time period；
In the current waveform in the preset time period, the maximum current value of preset quantity is chosen, and calculate mean value, as
The current characteristic number of recorded wave file.
3. the setting method of current quick definite value as described in claim 1, which is characterized in that if the sensitivity
Greater than the preset threshold of sensitivity, then the correction value based on the protection definite value updates protection definite value, comprising:
The sum of the correction value for calculating current protection definite value and the protection definite value, as updated protection definite value.
4. a kind of setting device of current quick definite value characterized by comprising
Module is obtained, for obtaining the position of each wave recording device and the recorded wave file of each wave recording device record, the record
Wave file is the recorded wave file that wave recording device is generated when three phase short circuit fault occurs for feeder line where the wave recording device；
Computing module, for the generation time based on the recorded wave file and the position for the wave recording device for recording the recorded wave file
It sets, calculates the weight coefficient of recorded wave file；
Generation module carries out the data in each recorded wave file for the weight coefficient according to selected recorded wave file
Weighted calculation, adjusting protection definite value, the rate of current protection definite value is three-phase shortcircuit under distribution network line maximum operational mode
Fault current limiting value；
The computing module includes:
Chosen module, in two breakers adjacent with the wave recording device, selecting a breaker to fill as the recording
Set corresponding adjusting breaker, the open circuit that feeder line section of the adjusting breaker where wave recording device is disconnected in current overload
Device；
First coefficient computational submodule, at a distance from corresponding adjusting breaker, being accounted for according to wave recording device with the wave recording device
Ratio at a distance from two breakers adjacent with the wave recording device, the position for generating the recorded wave file of wave recording device record are related
Coefficient；
Second coefficient computational submodule calculates the time correlation of recorded wave file for the generation time according to the recorded wave file
Coefficient；
Third coefficient computational submodule, for calculate recorded wave file the position related coefficient and the time correlation coefficient
Weighted average, the weight coefficient as the recorded wave file；
The generation module includes:
Initial value sets submodule, for obtaining the initial value of preset protection definite value；
Electric current computational submodule, for calculating the electricity of each recorded wave file according to the current waveform in each recorded wave file
Characteristic value is flowed, the current characteristic number is used to react the feature of the current waveform in the recorded wave file；
Difference computational submodule, for calculating the current characteristic number of each recorded wave file and the difference of protection definite value, as
The opposite correction value of each recorded wave file protection definite value；
Difference computational submodule, it is fixed to the protection of each recorded wave file for the weight coefficient according to the recorded wave file
The opposite correction value of value is weighted and averaged calculating, generates the correction value of protection definite value；
Check value computational submodule, the difference of the weight coefficient for subtracting the recorded wave file by 1, as the recorded wave file
Second weight coefficient, and according to the second weight coefficient of recorded wave file, the current characteristic number of each recorded wave file is carried out
Weighted average calculation generates fixed value checking value；
Calculation of Sensitivity submodule, for calculating the ratio of the fixed value checking value and the protection definite value, as sensitivity；
First implementation sub-module, if being greater than the preset threshold of sensitivity for the sensitivity, based on the protection definite value
Correction value updates protection definite value, and returns and execute the difference for calculating each current characteristic number and protection definite value, as
The operation of the opposite correction value of the protection definite value of each recorded wave file；
Second implementation sub-module terminates if being less than or equal to the preset threshold of sensitivity for the sensitivity to the guarantor
Protect the update of definite value.
5. a kind of setting device of current quick definite value, including memory, processor and storage are in the memory
And the computer program that can be run on the processor, which is characterized in that when the processor executes the computer program
It realizes such as the step of any one of claims 1 to 3 the method.
6. a kind of computer readable storage medium, the computer-readable recording medium storage has computer program, and feature exists
In when the computer program is executed by processor the step of any one of such as claims 1 to 3 of realization the method.
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| CN110416982A (en) * | 2019-08-03 | 2019-11-05 | 西南交通大学 | A method of circuit breaker trip number is reduced using Fault Current Limiting Device |
| CN111614066B (en) * | 2020-05-20 | 2022-06-10 | 国网河北省电力有限公司电力科学研究院 | Automatic setting method and system for relay protection setting value of power distribution network |
| CN112531629B (en) * | 2020-11-12 | 2023-02-28 | 国网河北省电力有限公司电力科学研究院 | Method and device for automatically setting protection setting value of power distribution network and terminal equipment |
| CN114389241B (en) * | 2021-12-13 | 2023-07-25 | 国网河北省电力有限公司电力科学研究院 | Relay protection setting value setting method and device for active power distribution network |
| CN115173374B (en) * | 2022-06-14 | 2023-11-21 | 中铁建电气化局集团第三工程有限公司 | Relay protection method, device, medium and equipment for traction power supply system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005124332A (en) * | 2003-10-17 | 2005-05-12 | Toshiba Corp | Digital protection relay device |
| CN1945912A (en) * | 2006-10-16 | 2007-04-11 | 黑龙江大学 | Method for realizing self adaptive current quick break protection of power supply circuit |
| CN101425682A (en) * | 2008-12-11 | 2009-05-06 | 宜宾电业局 | Electric grid relay protection constant value on-line check integrated data processing method |
| CN101882810A (en) * | 2010-06-02 | 2010-11-10 | 北京中恒博瑞数字电力科技有限公司 | Method for realizing cooperative work of fixed value adjusting system and on-line device |
| CN103501047A (en) * | 2013-10-09 | 2014-01-08 | 云南电力调度控制中心 | Intelligent fault wave recording main station information management system |
| CN105552861A (en) * | 2015-12-29 | 2016-05-04 | 河南省电力勘测设计院 | Adaptive current protection algorithm |
-
2017
- 2017-08-14 CN CN201710693656.XA patent/CN107370114B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005124332A (en) * | 2003-10-17 | 2005-05-12 | Toshiba Corp | Digital protection relay device |
| CN1945912A (en) * | 2006-10-16 | 2007-04-11 | 黑龙江大学 | Method for realizing self adaptive current quick break protection of power supply circuit |
| CN101425682A (en) * | 2008-12-11 | 2009-05-06 | 宜宾电业局 | Electric grid relay protection constant value on-line check integrated data processing method |
| CN101882810A (en) * | 2010-06-02 | 2010-11-10 | 北京中恒博瑞数字电力科技有限公司 | Method for realizing cooperative work of fixed value adjusting system and on-line device |
| CN103501047A (en) * | 2013-10-09 | 2014-01-08 | 云南电力调度控制中心 | Intelligent fault wave recording main station information management system |
| CN105552861A (en) * | 2015-12-29 | 2016-05-04 | 河南省电力勘测设计院 | Adaptive current protection algorithm |
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