CN109254227A - Detection method, apparatus and system towards electric network state - Google Patents
Detection method, apparatus and system towards electric network state Download PDFInfo
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- CN109254227A CN109254227A CN201710570918.3A CN201710570918A CN109254227A CN 109254227 A CN109254227 A CN 109254227A CN 201710570918 A CN201710570918 A CN 201710570918A CN 109254227 A CN109254227 A CN 109254227A
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- 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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Abstract
A kind of detection method towards electric network state, apparatus and system, wherein the described method includes: obtaining the transducing signal that multiple sensors are sent, multiple sensors obtain transducing signal for acquiring the signal of substation respectively；The partial discharge energy distribution model for characterizing substation's status information is constructed according to transducing signal, the distribution characteristics of status information is presented in partial discharge energy distribution model in space, frequency domain and time domain three-dimensional；The testing result of electric network state is obtained based on partial discharge energy distribution model.The detection mode of middle single dimension compared with the existing technology, scheme provided in an embodiment of the present invention can be improved the reliability of partial discharge signal detection and the accuracy of partial discharge source positioning.
Description
Technical field
The present invention relates to radio detection technical fields, and in particular to a kind of detection method towards electric network state, device and
System.
Background technique
For the apparatus insulated material of high-tension electricity in defective situation, some areas will form very strong electric field, by surrounding
Insulation punctures in short-term, generates shelf depreciation.Shelf depreciation usually occurs to a very small extent, and breakdown process quickly, will generate
Very steep pulse current, the rise time is less than 1ns, and stimulating frequency is up to the electromagnetic wave of number GHz.Prolonged partial discharge can be most
Cause the irrecoverability of the insulation performance of insulating materials to damage eventually, influences the normal operation of equipment, or even cause the accident.Cause
This, carries out partial discharge monitoring and positioning to high-tension apparatus, handles in advance defect, can effectively be avoided Fault of Insulating Breakdown
Generation, help to formulate targeted maintenance solution, reduce power off time, be the safe and reliable operation and shape of power equipment
State maintenance provides important reference.
There are many technology and methods for high-tension apparatus partial discharge monitoring.Such as ultrasonic wave positioning mode, superfrequency positioning mode, electrical
Positioning mode, light-seeking method etc..The direction and time that the ultrasonic wave that ultrasonic locatization is generated according to shelf depreciation is propagated are put to determine
The spatial position of power supply.Based on the wireless partial discharge location method of superfrequency earliest by Strathclyde university of Britain Martin Dudd
Professor proposes, is commonly used to detection substation's capital equipment such as transformer and switch partial discharge location, main to pass through detection transformer partial
The ultrahigh frequency electromagnetic wave signal of portion's electric discharge is positioned to obtain shelf depreciation information using time delay relational implementation.It is closed based on time delay
It is that the method that (Time Difference of Arrival) carries out partial discharge location requires sample rate high, data processing complex,
And require very accurate system synchronous, therefore cost of implementation is relatively high.This method is used primarily in regularly partial discharge walkaround inspection, and
The accurate positioning of targeted short distance is carried out to the equipment for having partial discharge suspicion, is not able to satisfy still inexpensive, online, comprehensive
Partial discharge monitoring demand.Currently, substation's Partial Discharge Detection and positioning based on the distribution of superfrequency wireless signal strength are
One hot spot of the area research, especially by the data fusion of distributed superfrequency wireless signal strength (energy measuring),
Cooperate wireless LAN communication technology, have it is at low cost, be not required to precise synchronization, be easy for installation, can be with advantages such as flexible expansions, can
To provide comprehensive, non-access formula, PD Online monitoring service for substation, the cost of equipment manual maintenance is substantially reduced,
Improve early warning rate.But it is compared with existing face paste formula or built-in ultrahigh frequency wireless sensor, non-access formula wireless sensor deployment
Position is opposite with a distance from partial discharge source will far, therefore the Partial discharge signal detected wants weak relatively, makes an uproar so being more susceptible to substation's background
The influence of sound and other various different electromagnetic interference signals.Various electromagnetic interferences can be effectively excluded, guarantee the reliable of partial discharge
The accurate positioning of detection and partial discharge source is the partial discharge based on non-access formula superfrequency wireless energy detection and sensor network technology
Can monitoring method obtain practical key.
Therefore, the accuracy of the reliability and the positioning of partial discharge source that how to improve partial discharge signal detection becomes skill urgently to be resolved
Art problem.
Summary of the invention
The technical problem to be solved in the present invention is that how to improve partial discharge signal detection reliability and partial discharge source positioning
Accuracy.
For this purpose, according in a first aspect, the embodiment of the invention discloses a kind of detection methods towards electric network state, comprising:
The transducing signal that multiple sensors are sent is obtained, multiple sensors are passed for acquiring the signal of substation respectively
Feel signal；The partial discharge energy distribution model for characterizing substation's status information, partial discharge Energy distribution are constructed according to transducing signal
The distribution characteristics of status information is presented in model in space, frequency domain and time domain three-dimensional；Electricity is obtained based on partial discharge energy distribution model
The testing result of net state.
Optionally, include: according to the partial discharge energy distribution model that transducing signal is constructed for characterizing substation's status information
Transducing signal is split to form multiple frequency sub-band on frequency domain by predeterminated frequency range；Transducing signal is pressed in the time domain pre-
If duration is split to form multiple phase sections；Transducing signal is constructed to obtain partial discharge according to multiple frequency sub-band and multiple phase sections
Energy distribution model.
Optionally, the testing result for obtaining electric network state based on partial discharge energy distribution model includes: on default frequency sub-band
Extracting cycle signal；Judge whether the amplitude of cyclical signal is greater than default amplitude；If the amplitude of cyclical signal is greater than
Default amplitude, then obtain that there may be the testing results that narrowband wireless communication interferes for characterize.
Optionally, the testing result for obtaining electric network state based on partial discharge energy distribution model includes: monitoring office in the time domain
Put energy distribution model；When receive single pulse mutation interrupt signal when, obtain for characterize there may be switch motions
Testing result.
Optionally, the testing result for obtaining electric network state based on partial discharge energy distribution model includes: in pre-set space range
Outer monitoring partial discharge energy distribution model；When receiving signal similar with partial discharge Energy distribution within the scope of pre-set space, obtain
For characterizing the interference signal there may be corona discharge.
Optionally, the testing result for obtaining electric network state based on partial discharge energy distribution model includes: by the office of preset period of time
Energy distribution is put to be compared to obtain comparison result with the partial discharge Energy distribution of benchmark period；Judge whether comparison result is more than pre-
If difference；If comparison result is more than preset difference value, the detection for characterizing preset period of time there may be ambient noise is obtained
As a result.
According to second aspect, the embodiment of the invention discloses a kind of detection devices towards electric network state, comprising:
Signal acquisition module, the transducing signal sent for obtaining multiple sensors, multiple sensors for acquiring respectively
The signal of substation obtains transducing signal；Model construction module, for being constructed according to transducing signal for characterizing substation's state
Status information is presented in the partial discharge energy distribution model of information, partial discharge energy distribution model in space, frequency domain and time domain three-dimensional
Distribution characteristics；Detection module, for obtaining the testing result of electric network state based on partial discharge energy distribution model.
According to the third aspect, the embodiment of the invention discloses a kind of computer installation, including processor, processor is for holding
The computer program stored in line storage realizes following method:
The transducing signal that multiple sensors are sent is obtained, multiple sensors are passed for acquiring the signal of substation respectively
Feel signal；The partial discharge energy distribution model for characterizing substation's status information, partial discharge Energy distribution are constructed according to transducing signal
The distribution characteristics of status information is presented in model in space, frequency domain and time domain three-dimensional；Electricity is obtained based on partial discharge energy distribution model
The testing result of net state.
According to fourth aspect, the embodiment of the invention discloses a kind of computer readable storage mediums, are stored thereon with calculating
Machine program, processor are used to execute the computer program stored in memory and realize following method:
The transducing signal that multiple sensors are sent is obtained, multiple sensors are passed for acquiring the signal of substation respectively
Feel signal；The partial discharge energy distribution model for characterizing substation's status information, partial discharge Energy distribution are constructed according to transducing signal
The distribution characteristics of status information is presented in model in space, frequency domain and time domain three-dimensional；Electricity is obtained based on partial discharge energy distribution model
The testing result of net state.
Technical solution of the present invention has the advantages that
Detection method provided in an embodiment of the present invention towards electric network state, apparatus and system, since multiple sensors are used
Transducing signal is obtained in the signal for acquiring substation respectively, after obtaining the transducing signal that multiple sensors are sent, according to the biography
Sense signal can construct the partial discharge energy distribution model for characterizing substation's status information, in space, frequency domain and time domain three
The distribution characteristics of status information is presented in dimension, then, may be implemented to carry out electric network state in three-dimensional by the distributed model
Detection obtains testing result, compared with the existing technology the detection mode of middle single dimension, and scheme provided in an embodiment of the present invention can
Improve the reliability of partial discharge signal detection and the accuracy of partial discharge source positioning.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of detection method flow chart towards electric network state in the present embodiment；
Fig. 2 is a kind of detection system structural block diagram towards electric network state in the present embodiment；
Fig. 3 is a kind of structure of the detecting device schematic diagram towards electric network state in the present embodiment.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can be with
It is the connection inside two elements, can be wireless connection, be also possible to wired connection.For those of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments
It can be combined with each other at conflict.
In order to improve the reliability of partial discharge signal detection and the accuracy of partial discharge source positioning, present embodiment discloses a kind of faces
To the detection method of electric network state, referring to FIG. 1, be the detection method flow chart towards electric network state, it should be towards power grid shape
The detection method of state includes:
Step S100 obtains the transducing signal that multiple sensors are sent.In the present embodiment, multiple sensors for adopting respectively
The signal of collection substation obtains transducing signal.In a particular embodiment, referring to FIG. 2, for one kind disclosed in the present embodiment towards
The detection system structure of electric network state, the system have several to be distributed in the superfrequency wireless energy of substation sensing
Device, a partial discharge monitoring main website and wireless sense network.Wireless sense network for sensor and partial discharge monitor main website provide it is two-way reliable
Communication.The upload sensing data of each cycle sensor, partial discharge monitor main website and carry out convergence analysis to data are received, and find out partial discharge
Signal and position.Partial discharge monitors main website can be with the main operation modes and parameter of Configuration Online sensor by wireless sense network.
In the present embodiment, the partial discharge radio signal frequency of each sensor acquisition is very wide, generally from tens MHz to 2-3GHz (in profession
Boundary is commonly called as superfrequency).Since high frequency signal attenuation is fast, non-access formula superfrequency wireless energy sensor usually detects 50-
800MHz frequency range.
Step S200 constructs the partial discharge energy distribution model for characterizing substation's status information according to transducing signal.This
In embodiment, due to being distributed multiple sensors in the predetermined position of substation, pass through the transducing signal of each sensor, Ke Yi
The distribution characteristics of the status information of substation is spatially reflected, therefore, in the present embodiment, the partial discharge energy distribution model of building
The distribution characteristics of status information is presented in space, frequency domain and time domain three-dimensional.
Step S300 obtains the testing result of electric network state based on partial discharge energy distribution model.In the present embodiment, pass through structure
The three-dimensional partial discharge energy distribution model built, test and analyze to corresponding signal the testing result of available electric network state.
In an alternate embodiment of the invention, it when executing step S200, is constructed according to transducing signal for characterizing substation's state
The partial discharge energy distribution model of information includes: to be split to form multiple sons by predeterminated frequency range on frequency domain by transducing signal
Frequency range；It is split transducing signal to form multiple phase sections by preset duration in the time domain；According to multiple frequency sub-band and multiple
Phase section constructs transducing signal to obtain partial discharge energy distribution model.Specifically, the frequency range each sensor detected point
For M frequency sub-band, wherein M is positive integer, and without loss of generality, certain frequency sub-band can be a part or son frequency of other frequency sub-band
Band frequency can partly overlap；And power frequency period is divided into N number of period (being also phase section), wherein N is positive integer.Sensing
Signal generates the equivalence value of the N number of reflection superfrequency energy intensity of Z=M x in each power frequency period, forms two-dimensional partial discharge energy
Operating frequency phase and spectrogram or abbreviation partial discharge energy time-frequency figure, naturally it is also possible to construct three-dimensional partial discharge energy distribution model.It lifts
A example, it is assumed that have 4 frequency sub-band, 16 phase sections, each energy intensity equivalence value has 8bit expression, then a power frequency period is
Every 20ms sensor just generates the sensing data of 512bit, it is assumed that 50% protocol redundancy then shares 1024bit and uploads number
According to.Corresponding transmission rate is 51.2kbps.For being repeated cyclically the Partial discharge signal of generation, can be according to wireless sense network
Regiment commander is wide and other factors, partial discharge monitoring main website can send a partial discharge energy time-frequency with the every L power frequency period of instruction sensor
Figure.Assuming that L=20, then every sensor senses data uploading rate is reduced to 2.56kbps.Such as L >=1, each sensor can be to L
The sensing data (i.e. so-called partial discharge energy time-frequency figure) of continuous power frequency period first carries out corresponding statistical correlation processing, then on
It passes, the sensing data an of power frequency period can also be selected to upload.It is essential that in order to carry out space correlation comparative analysis, it is each to pass
The sensing data that sensor is sent must keep power frequency period synchronous with operating frequency phase.In order to keep power frequency period and operating frequency phase same
Step, partial discharge monitoring main website can be used power-frequency voltage zero-crossing examination device, locally obtaining power frequency synchronizing information, then passing through nothing
Line Sensor Network sends power frequency time synchronization and controls signal.Each sensor has the power frequency time synchronism apparatus an of local, passes through
The time synchronization information that control main website is sent regularly is received, local power frequency clock is adjusted.It is specific how to utilize wireless communication networks
Network realizes that power frequency synchronization is related with mac-layer protocol with the physical layer of used cordless communication network, and sensor side power frequency is synchronous
The complexity of realization device is related with the accuracy of synchronous requirement.It should be noted that numerical value disclosed in above-described embodiment is to this
The scheme of embodiment does not constitute a limitation.
In order to detect whether that there are narrowband wireless communication interference, in an alternate embodiment of the invention, when executing step S300, base
In the testing result that partial discharge energy distribution model obtains electric network state include: the extracting cycle signal on default frequency sub-band；Sentence
Whether the amplitude of disconnected cyclical signal is greater than default amplitude；If the amplitude of cyclical signal is greater than default amplitude, used
In characterization, there may be the testing results that narrowband wireless communication interferes.Narrowband wireless communication interference, such as fm broadcast signal, TV
Broadcast singal, mobile communication signal.Relative to Partial discharge signal, narrowband wireless communication signal has extremely strong frequency selectivity, greatly
In the wireless communication of 1GHz, can be eliminated by filter.It is dry in superfrequency wireless energy sensor detection range
It disturbs, frequency range can be will test and be divided into M sub-band, can selectively use the sensing data of a certain sub-band, such as
In a certain sub-band there are stronger interference, it is ignored as the sensing data in this sub-band of this period, and then improve whole
The signal-to-noise ratio of a detection.In addition, usually narrowband wireless communication interference source is general and sensor distance farther out, and each sensor is opposite
It is closer, therefore each sensor can receive such interference signal simultaneously, sensor main website can find out this by comparing
A little common interference components.In a particular embodiment, alleged default amplitude can rule of thumb or theoretical knowledge determines.
It is being executed in an alternate embodiment of the invention to detect the pulse that the switch motion of disconnecting switch and breaker generates
It include: to monitor partial discharge energy in the time domain based on the testing result that partial discharge energy distribution model obtains electric network state when step S300
Measure distributed model；When receiving the interrupt signal of single pulse mutation, obtain for characterizing the inspection there may be switch motion
Survey result.In general, pulse and Partial discharge signal frequency spectrum that the switch motion of disconnecting switch and breaker generates have certain weight
It is folded, it is difficult to exclude this kind of broadband electromagnetical interference with common frequency domain technique, such as filtering.But these impulse disturbances usually have compared with
Strong time selectivity, therefore can be by transducing signal data being observed continuously in the time domain is received, using coherent detection
And pattern-recognition can largely detect these pulses electricity when receiving the interrupt signal of single pulse mutation
Magnetic disturbance.
In order to detect corona discharge, in an alternate embodiment of the invention, when executing step S300, it is based on partial discharge Energy distribution mould
The testing result that type obtains electric network state includes: the monitoring partial discharge energy distribution model outside pre-set space range；When receive with
Within the scope of pre-set space when the similar signal of partial discharge Energy distribution, obtain that there may be the interference of corona discharge letters for characterizing
Number.In the present embodiment, alleged pre-set space refers to the space on the peripheries such as transformation cabinet, and specific spatial dimension can rule of thumb really
It is fixed.In a particular embodiment, similar to partial discharge Energy distribution within the scope of pre-set space when being received outside the pre-set space range
Signal when, it can be determined that go out outside pre-set space there may be the interference signals of corona discharge.
In order to detect ambient noise, in an alternate embodiment of the invention, when executing step S300, it is based on partial discharge Energy distribution mould
The testing result that type obtains electric network state includes: by the partial discharge Energy distribution of the partial discharge Energy distribution of preset period of time and benchmark period
It is compared to obtain comparison result；Judge whether comparison result is more than preset difference value；If comparison result is more than preset difference value,
Obtain the testing result for characterizing preset period of time there may be ambient noise.Specifically, ambient noise be usually by it is many not
Relevant noise process superposition and formed, frequency spectrum is wider, there is certain frequency selectivity.Ambient noise is set with substation's difference
Standby working condition is related.Ambient noise can have obvious change in big time zone section (such as daytime and evening) at any time
Change, therefore, the partial discharge Energy distribution of preset period of time can be compared with the partial discharge Energy distribution of benchmark period, when presence compared with
When big difference, then illustrate that there may be ambient noises for the preset period of time.In a particular embodiment, the alleged benchmark period can be preparatory
Definition, selection.
The present embodiment also discloses a kind of detection device towards electric network state, referring to FIG. 3, for should be towards electric network state
Structure of the detecting device schematic diagram, should detection device towards electric network state include: signal acquisition module 100, model construction mould
Block 200 and detection module 300, in which:
Signal acquisition module 100 is used to obtain the transducing signal that multiple sensors are sent, and multiple sensors for adopting respectively
The signal of collection substation obtains transducing signal；Model construction module 200 is used to be constructed according to transducing signal for characterizing substation
The partial discharge energy distribution model of status information, partial discharge energy distribution model are believed in space, frequency domain and time domain three-dimensional in present condition
The distribution characteristics of breath；Detection module 300 is used to obtain the testing result of electric network state based on partial discharge energy distribution model.
In addition, the present embodiment also discloses a kind of computer installation, including processor, processor is for executing in memory
The computer program of storage realizes following method:
The transducing signal that multiple sensors are sent is obtained, multiple sensors are passed for acquiring the signal of substation respectively
Feel signal；The partial discharge energy distribution model for characterizing substation's status information, partial discharge Energy distribution are constructed according to transducing signal
The distribution characteristics of status information is presented in model in space, frequency domain and time domain three-dimensional；Electricity is obtained based on partial discharge energy distribution model
The testing result of net state.
Optionally, include: according to the partial discharge energy distribution model that transducing signal is constructed for characterizing substation's status information
Transducing signal is split to form multiple frequency sub-band on frequency domain by predeterminated frequency range；Transducing signal is pressed in the time domain pre-
If duration is split to form multiple phase sections；Transducing signal is constructed to obtain partial discharge according to multiple frequency sub-band and multiple phase sections
Energy distribution model.
Optionally, the testing result for obtaining electric network state based on partial discharge energy distribution model includes: on default frequency sub-band
Extracting cycle signal；Judge whether the amplitude of cyclical signal is greater than default amplitude；If the amplitude of cyclical signal is greater than
Default amplitude, then obtain that there may be the testing results that narrowband wireless communication interferes for characterize.
Optionally, the testing result for obtaining electric network state based on partial discharge energy distribution model includes: monitoring office in the time domain
Put energy distribution model；When receive single pulse mutation interrupt signal when, obtain for characterize there may be switch motions
Testing result.
Optionally, the testing result for obtaining electric network state based on partial discharge energy distribution model includes: in pre-set space range
Outer monitoring partial discharge energy distribution model；When receiving signal similar with partial discharge Energy distribution within the scope of pre-set space, obtain
For characterizing the interference signal there may be corona discharge.
Optionally, the testing result for obtaining electric network state based on partial discharge energy distribution model includes: by the office of preset period of time
Energy distribution is put to be compared to obtain comparison result with the partial discharge Energy distribution of benchmark period；Judge whether comparison result is more than pre-
If difference；If comparison result is more than preset difference value, the detection for characterizing preset period of time there may be ambient noise is obtained
As a result.
It is that can lead to it will be understood by those skilled in the art that realizing all or part of the process in above-described embodiment method
Computer program is crossed to instruct relevant hardware and complete, the program can be stored in a computer-readable storage medium
In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic
Dish, CD, read-only memory (ROM) or random access memory (RAM) etc..Computer processor is situated between for executing storage
The computer program stored in matter realizes following methods:
The transducing signal that multiple sensors are sent is obtained, multiple sensors are passed for acquiring the signal of substation respectively
Feel signal；The partial discharge energy distribution model for characterizing substation's status information, partial discharge Energy distribution are constructed according to transducing signal
The distribution characteristics of status information is presented in model in space, frequency domain and time domain three-dimensional；Electricity is obtained based on partial discharge energy distribution model
The testing result of net state.
Optionally, include: according to the partial discharge energy distribution model that transducing signal is constructed for characterizing substation's status information
Transducing signal is split to form multiple frequency sub-band on frequency domain by predeterminated frequency range；Transducing signal is pressed in the time domain pre-
If duration is split to form multiple phase sections；Transducing signal is constructed to obtain partial discharge according to multiple frequency sub-band and multiple phase sections
Energy distribution model.
Optionally, the testing result for obtaining electric network state based on partial discharge energy distribution model includes: on default frequency sub-band
Extracting cycle signal；Judge whether the amplitude of cyclical signal is greater than default amplitude；If the amplitude of cyclical signal is greater than
Default amplitude, then obtain that there may be the testing results that narrowband wireless communication interferes for characterize.
Optionally, the testing result for obtaining electric network state based on partial discharge energy distribution model includes: monitoring office in the time domain
Put energy distribution model；When receive single pulse mutation interrupt signal when, obtain for characterize there may be switch motions
Testing result.
Optionally, the testing result for obtaining electric network state based on partial discharge energy distribution model includes: in pre-set space range
Outer monitoring partial discharge energy distribution model；When receiving signal similar with partial discharge Energy distribution within the scope of pre-set space, obtain
For characterizing the interference signal there may be corona discharge.
Optionally, the testing result for obtaining electric network state based on partial discharge energy distribution model includes: by the office of preset period of time
Energy distribution is put to be compared to obtain comparison result with the partial discharge Energy distribution of benchmark period；Judge whether comparison result is more than pre-
If difference；If comparison result is more than preset difference value, the detection for characterizing preset period of time there may be ambient noise is obtained
As a result.
The present embodiment also discloses a kind of detection system towards electric network state, referring to FIG. 2, should be towards electric network state
Detection system includes: multiple sensors and monitoring main website, in which:
Multiple sensors obtain transducing signal for acquiring the signal of substation respectively；Main website is monitored to be used for according to above-mentioned reality
It applies method disclosed in example and obtains testing result.
Detection method provided in this embodiment towards electric network state, apparatus and system, due to multiple sensors for point
Not Cai Ji the signal of substation obtain transducing signal, after obtaining the transducing signal that multiple sensors are sent, believed according to the sensing
The partial discharge energy distribution model for characterizing substation's status information number can be constructed, in space, frequency domain and time domain three-dimensional
The distribution characteristics that status information is presented then may be implemented to detect electric network state in three-dimensional by the distributed model
Testing result is obtained, the detection mode of middle single dimension, scheme provided in an embodiment of the present invention can be improved compared with the existing technology
The accuracy of the reliability of partial discharge signal detection and the positioning of partial discharge source.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (10)
1. a kind of detection method towards electric network state characterized by comprising
The transducing signal that multiple sensors are sent is obtained, the multiple sensor obtains institute for acquiring the signal of substation respectively
State transducing signal；
The partial discharge energy distribution model for characterizing substation's status information, the partial discharge are constructed according to the transducing signal
The distribution characteristics of the status information is presented in energy distribution model in space, frequency domain and time domain three-dimensional；
The testing result of electric network state is obtained based on the partial discharge energy distribution model.
2. as described in claim 1 towards the detection method of electric network state, which is characterized in that described according to the transducing signal
Constructing the partial discharge energy distribution model for characterizing substation's status information includes:
The transducing signal is split to form multiple frequency sub-band on frequency domain by predeterminated frequency range；
It is split the transducing signal to form multiple phase sections by preset duration in the time domain；
The transducing signal is constructed to obtain the partial discharge Energy distribution according to the multiple frequency sub-band and the multiple phase section
Model.
3. as claimed in claim 2 towards the detection method of electric network state, which is characterized in that described to be based on the partial discharge energy
The testing result that distributed model obtains electric network state includes:
The extracting cycle signal on default frequency sub-band；
Judge whether the amplitude of the cyclical signal is greater than default amplitude；
If the amplitude of the cyclical signal greater than default amplitude, is obtained, for characterizing, there may be narrowband wireless communications to do
The testing result disturbed.
4. the detection method as claimed in any one of claims 1-3 towards electric network state, which is characterized in that described to be based on institute
It states partial discharge energy distribution model and obtains the testing result of electric network state and include:
The partial discharge energy distribution model is monitored in the time domain；
When receiving the interrupt signal of single pulse mutation, obtain for characterizing the testing result there may be switch motion.
5. the detection method as claimed in any one of claims 1-3 towards electric network state, which is characterized in that described to be based on institute
It states partial discharge energy distribution model and obtains the testing result of electric network state and include:
The partial discharge energy distribution model is monitored outside pre-set space range；
When receiving signal similar with partial discharge Energy distribution within the scope of the pre-set space, obtain for characterize there may be
The testing result of the interference signal of corona discharge.
6. the detection method as claimed in any one of claims 1-3 towards electric network state, which is characterized in that described to be based on institute
It states partial discharge energy distribution model and obtains the testing result of electric network state and include:
The partial discharge Energy distribution of preset period of time is compared to obtain comparison result with the partial discharge Energy distribution of benchmark period；
Judge whether the comparison result is more than preset difference value；
If the comparison result is more than preset difference value, the detection for characterizing preset period of time there may be ambient noise is obtained
As a result.
7. a kind of detection device towards electric network state characterized by comprising
Signal acquisition module, the transducing signal sent for obtaining multiple sensors, the multiple sensor for acquiring respectively
The signal of substation obtains the transducing signal；
Model construction module, for constructing the partial discharge energy for characterizing substation's status information according to the transducing signal
Distributed model, the distribution that the status information is presented in the partial discharge energy distribution model in space, frequency domain and time domain three-dimensional are special
Sign；
Detection module, for obtaining the testing result of electric network state based on the partial discharge energy distribution model.
8. a kind of computer installation, which is characterized in that including processor, the processor is based on executing and storing in memory
Calculation machine program realizes the method such as claim 1-6 any one.
9. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that processor is deposited for executing
The computer program stored in storage media realizes method as claimed in any one of claims 1 to 6.
10. a kind of detection system towards electric network state characterized by comprising
Multiple sensors, the signal for acquiring substation respectively obtain transducing signal；
Main website is monitored, for obtaining testing result according to method as claimed in any one of claims 1 to 6.
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