CN106771910A - The method and apparatus of the defect of detection combination electrical equipment - Google Patents

The method and apparatus of the defect of detection combination electrical equipment Download PDF

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Publication number
CN106771910A
CN106771910A CN201611131875.0A CN201611131875A CN106771910A CN 106771910 A CN106771910 A CN 106771910A CN 201611131875 A CN201611131875 A CN 201611131875A CN 106771910 A CN106771910 A CN 106771910A
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China
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signal
combined electrical
phase
amplitude
abnormal
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CN201611131875.0A
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Chinese (zh)
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CN106771910B (en
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王希
韩晓昆
赵璧
孟玉瑾
于鸿洁
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国网北京市电力公司
国家电网公司
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12Testing 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
    • G01R31/1227Testing 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 of components, parts or materials

Abstract

The invention discloses a kind of method and apparatus of the defect of detection combination electrical equipment.Wherein, the method includes:Obtain the test position that combined electrical apparatus to be measured occurs shelf depreciation;The shelf depreciation of test position is detected, abnormal signal is obtained;The abnormal signal obtained according to detection determines the abnormal position in combined electrical apparatus;The defect phase of combined electrical apparatus is determined according to the abnormal position in combined electrical apparatus.The present invention solves existing superfrequency partial discharge detection method and cannot effectively carry out the technical problem of partial discharge detection.

Description

The method and apparatus of the defect of detection combination electrical equipment
Technical field
The present invention relates to partial discharge detection field, in particular to the method and dress of a kind of defect of detection combination electrical equipment Put.
Background technology
In recent years, with the fast development of power technology, gas-insulating and fully-enclosed combined electrical apparatus (GIS, HGIS) increasingly takes Safe and stable operation for traditional converting equipment, but combined electrical apparatus is limited by shelf depreciation.However, partial discharge detection need of work Checking experiment personnel have know-how higher and accurate analysis capability, but the checking experiment personnel of mean level are difficult to complete this Item work.Therefore, in the case that the combined electric appliance equipment of and needs maintenance less in professional testing staff is more, combined electrical apparatus Partial discharge detection workload is than larger.
Superfrequency partial discharge detection is a kind of important method of combined electrical apparatus partial discharge detection.At present, superfrequency partial discharge detection does not have There is unified operation standard and clear and definite defect dipoles standard.In working site, the work of combined electrical apparatus partial discharge detection is using special High frequency partial discharge detection instrument is detected.Because superfrequency partial discharge detection position cannot be fixed, it is therefore desirable to after testing staff searches Just can determine that, be normally at nonmetallic totally-enclosed insulating basin, cable termination, grounding switch insulating part, observation window etc..It is extra-high The lasting detection time of frequency partial discharge detection can be grasped voluntarily without fixed standard, testing staff.The huge situation of workload at the scene Under, testing staff can arbitrarily shorten working hours, and cause judged result deviation occur with actual conditions.Therefore, carry out at the scene During work, each specialty detection troop is needed to formulate independent workflow, and determination of the human factor to partial discharge defect is generated very Big influence.
The problem of partial discharge detection cannot be effectively carried out for above-mentioned existing superfrequency partial discharge detection method, at present not yet Propose effective solution.
The content of the invention
A kind of method and apparatus of the defect of detection combination electrical equipment are the embodiment of the invention provides, it is existing at least to solve Superfrequency partial discharge detection method cannot effectively carry out the technical problem of partial discharge detection.
A kind of one side according to embodiments of the present invention, there is provided method of the defect of detection combination electrical equipment, including:Obtain Take the test position that combined electrical apparatus to be measured occurs shelf depreciation;The shelf depreciation of test position is detected, abnormal signal is obtained;Root The abnormal signal obtained according to detection determines the abnormal position in combined electrical apparatus;According to the abnormal position in combined electrical apparatus Determine the defect phase of combined electrical apparatus.
Further, the shelf depreciation of test position is detected, the method for obtaining abnormal signal includes:Use superfrequency partial discharge Detector detects the ambient signal of test position, and by comparing the changing value of the amplitude size of ultrahigh-frequency signal, positioning is obtained Abnormal signal;Or, in the case where combined electrical apparatus is three-phase split-type structural, by multiple separate in three-phase split-type structural Abnormal signal is obtained to position.
Further, in by three-phase split-type structural it is multiple separate come position obtain abnormal signal after also wrap Include:By the abnormal signal amplitude of relatively more multiple separate corresponding test positions, the phase of existing defects is determined;Or, pass through Compare each separate time difference for detecting abnormal signal, determine the phase of existing defects.
Further, also included before the test position of combined electrical apparatus generation shelf depreciation to be measured is obtained:Acquisition is treated The synchronizing signal of combined electrical apparatus is surveyed, wherein, synchronizing signal is used to ensure that power supply is identical with the electric voltage frequency of combined electrical apparatus, the step Including:Synchronizing signal is obtained at operation cable, or, obtaining synchronizing signal in excitation low pressure side.
Further, the abnormal signal for being obtained according to detection determines the method bag of the abnormal position in combined electrical apparatus Include:Collection ambient signal;The parameter of the parameter of contrast_environment signal and the internal signal of combined electrical apparatus, wherein, ambient signal Parameter at least includes one of following:Phase and amplitude, the parameter of the internal signal of combined electrical apparatus is at least including one of following:Phase And amplitude;If the phase of ambient signal is identical with the phase of the internal signal of combined electrical apparatus, and the amplitude of ambient signal is big In the amplitude of the internal signal of combined electrical apparatus, it is determined that the abnormal outside positioned at combined electrical apparatus to be measured, otherwise, abnormal being located at is treated The inside of the combined electrical apparatus of survey.
Further, the method for the defect of detection combination electrical equipment also includes:The width of the ultrahigh-frequency signal of contrasting detection position Value, determines two positions of ultrahigh-frequency signal;Position according to time difference method and two ultrahigh-frequency signals determines the position of defect.
Another aspect according to embodiments of the present invention, additionally provides a kind of device of the defect of detection combination electrical equipment, including: , there is the test position of shelf depreciation for obtaining combined electrical apparatus to be measured in acquisition module;Detection module, for detecting detecting position The shelf depreciation put, obtains abnormal signal;First performing module, the abnormal signal for being obtained according to detection determines abnormal being located at Position in combined electrical apparatus;Second performing module, for determining combined electrical apparatus according to the abnormal position in combined electrical apparatus Defect phase.
Further, detection module includes:First locating module, for detecting detecting position using superfrequency partial discharge detection instrument The ambient signal put, and by comparing the changing value of the amplitude size of ultrahigh-frequency signal, positioning obtains abnormal signal;Or, second Locating module, in the case of being three-phase split-type structural in combined electrical apparatus, by the multiple phases in three-phase split-type structural Abnormal signal is not obtained positioning.
Further, detection module also includes:First contrast module, for by relatively more multiple separate corresponding detecting positions The abnormal signal amplitude put, determines the phase of existing defects;Or, the second contrast module, for by comparing each separate inspection The time difference of abnormal signal is measured, the phase of existing defects is determined.
Further, the device of the defect of detection combination electrical equipment also includes:Signal acquisition module, for obtaining combination to be measured The synchronizing signal of electrical equipment, wherein, synchronizing signal is used to ensure that power supply is identical with the electric voltage frequency of combined electrical apparatus, signal acquisition module Including:Synchronous signal obtaining module, for obtaining synchronizing signal at operation cable, or, obtaining synchronous in excitation low pressure side Signal.
Further, the first performing module includes:Acquisition module, for gathering ambient signal;Parameter comparison module, is used for The parameter of the parameter of contrast_environment signal and the internal signal of combined electrical apparatus, wherein, the parameter of ambient signal is at least including as follows One of:Phase and amplitude, the parameter of the internal signal of combined electrical apparatus is at least including one of following:Phase and amplitude;3rd positioning Module, if it is identical with the phase of the internal signal of combined electrical apparatus for the phase of ambient signal, and ambient signal amplitude More than the amplitude of the internal signal of combined electrical apparatus, it is determined that the abnormal outside positioned at combined electrical apparatus to be measured, otherwise, it is located at extremely The inside of combined electrical apparatus to be measured.
Further, the device of the defect of detection combination electrical equipment also includes:Amplitude contrast module, for contrasting detection position Ultrahigh-frequency signal amplitude, determine two positions of ultrahigh-frequency signal;4th locating module, for according to time difference method and two The position of individual ultrahigh-frequency signal determines the position of defect.
In embodiments of the present invention, by the way of examination criteria is formulated, occur by obtaining combined electrical apparatus method to be measured The test position of shelf depreciation, and detect the shelf depreciation of test position, obtains abnormal signal, then according to detection obtain it is different Regular signal determines the abnormal position in combined electrical apparatus, and combination electricity is determined finally according to the abnormal position in combined electrical apparatus The defect phase of device, has reached the purpose of the partial discharge defect of wired discovery combined electrical apparatus, it is achieved thereby that improving testing staff's The technique effect of operating efficiency, and then solve existing superfrequency partial discharge detection method and cannot effectively carry out partial discharge detection Technical problem.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this hair Bright schematic description and description does not constitute inappropriate limitation of the present invention for explaining the present invention.In the accompanying drawings:
Fig. 1 is a kind of method flow diagram of the defect of detection combination electrical equipment according to embodiments of the present invention;
Fig. 2 is the method flow diagram of the defect of a kind of optional detection combination electrical equipment according to embodiments of the present invention;
Fig. 3 is the method flow diagram of the defect of a kind of optional detection combination electrical equipment according to embodiments of the present invention;
Fig. 4 is the method flow diagram of the defect of a kind of optional detection combination electrical equipment according to embodiments of the present invention;
Fig. 5 is the method flow diagram of the defect of a kind of optional detection combination electrical equipment according to embodiments of the present invention;
Fig. 6 is the superfrequency partial discharge detection position notation methods of a kind of optional combined electrical apparatus according to embodiments of the present invention Figure;And
Fig. 7 is a kind of apparatus structure schematic diagram of the defect of detection combination electrical equipment according to embodiments of the present invention.
Specific embodiment
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention Accompanying drawing, is clearly and completely described to the technical scheme in the embodiment of the present invention, it is clear that described embodiment is only The embodiment of a part of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people The every other embodiment that member is obtained under the premise of creative work is not made, should all belong to the model of present invention protection Enclose.
It should be noted that term " first ", " in description and claims of this specification and above-mentioned accompanying drawing Two " it is etc. for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so using Data can exchange in the appropriate case, so as to embodiments of the invention described herein can with except illustrating herein or Order beyond those of description is implemented.Additionally, term " comprising " and " having " and their any deformation, it is intended that cover Lid is non-exclusive to be included, for example, the process, method, system, product or the equipment that contain series of steps or unit are not necessarily limited to Those steps or unit clearly listed, but may include not list clearly or for these processes, method, product Or other intrinsic steps of equipment or unit.
Embodiment 1
According to embodiments of the present invention, there is provided a kind of embodiment of the method for the defect of detection combination electrical equipment.
Fig. 1 is the method flow diagram of the defect of detection combination electrical equipment according to embodiments of the present invention, as shown in figure 1, the party Method comprises the following steps:
Step S102, obtains the test position that combined electrical apparatus to be measured occurs shelf depreciation;
Step S104, detects the shelf depreciation of test position, obtains abnormal signal;
Step S106, the abnormal signal obtained according to detection determines the abnormal position in combined electrical apparatus;
Step S108, the defect phase of combined electrical apparatus is determined according to the abnormal position in combined electrical apparatus.
In the scheme that above-mentioned steps S102 is limited to step S108, the above-mentioned detection to shelf depreciation (i.e. partial discharge) can Think the detection to superfrequency partial discharge, the test position that above-mentioned combined electrical apparatus to be measured occurs shelf depreciation is the inspection of superfrequency Location is put.In a kind of optional embodiment, it is necessary to interval operation each to combined electrical apparatus before superfrequency partial discharge detection is carried out Situation carries out image retention.When being detected to superfrequency partial discharge, the test position of superfrequency can be:Disc insulator At nonmetallic closing and at cable termination (if having cable machinery).If disc insulator is closed for all-metal, sensor is put Put at grounding switch insulating part and observation window, and extra-high video sensor avoids being contacted with fastening bolt.Fig. 6 shows one kind The superfrequency partial discharge detection position notation methods figure of optional combined electrical apparatus, wherein, in Fig. 6 601,603 and 605 is above-mentioned group The test position that electrical equipment occurs shelf depreciation is closed, 1# basins, 2# basins and 3# basins are represented respectively.
It should be noted that the storage naming rule of superfrequency detection data is:Power transformation name of station+detection date+each combination Electrical equipment scheduling number+separate, wherein, it is separate that the common storehouse equipment of three-phase can not record detection.Additionally, superfrequency detection time is defined as: The effective detection time of each test position is no less than 30 seconds, preserves collection of illustrative plates quantity and is no less than 10, and for preserving The time of collection of illustrative plates is no less than 20 seconds.
In an alternative embodiment, the defect of combined electrical apparatus is determined according to the abnormal position in combined electrical apparatus Phase, the attenuation characteristic according to ultrahigh-frequency signal can determine the defective locations of combined electrical apparatus, and defect phase and institute is being determined Postpone in place, also defect type can be determined according to the discharge characteristic of ultrahigh-frequency signal.According to defect type and defect location result, With reference to the primary structure of combined electrical apparatus, the correctness of test result can be verified.
It should be noted that after the defect phase, defective locations and the determination defect classification that obtain combined electrical apparatus, also Need to carry out the combined electric appliance equipment that there is discharge defect image retention, and clearly each superfrequency test point position.Wherein, Influence retention requirement PRPD, PHD collection of illustrative plates are no less than 3, and in the absence of known interfering signal., it is necessary to most in detection process Limits ground keeps the clean of ambient signals, and the interference of artifactual epochs is reduced as far as possible, and detection time can be extended if necessary.Needing In the case of recording disc insulator, it then follows following numbering principle:The line segregation of combined electrical apparatus is pressed from circuit to bus, and And mother (segmentation) interval is ranked up by from small size bus to large size bus, PT intervals are by the order from PT to bus, it is determined as 1st, 2,3 ... N, wherein, the disc insulator number of three-phase separate storehouse equipment answers split-phase sequencing.
In an alternative embodiment, after the superfrequency partial discharge detection of combined electrical apparatus terminates, can be schemed according to detection Spectrum carries out live data analysis.It should be noted that should now exclude the interference signal, and partial discharge defect to existing is determined Property, quantitative analysis, and then determine the size and electric discharge type of electric discharge, and record live basic condition.In addition in superfrequency After partial discharge detection end-of-job, the power supply of superfrequency partial discharge detection instrument is first closed, then remove experiment power supply, ground wire, arranged and survey Examination cable, cleaning work scene checks again for detected combined electrical apparatus without exception.
Based on the scheme that step S102 in above-described embodiment is limited to step S106, can know to be measured by obtaining There is the test position of shelf depreciation in combined electrical apparatus method, and detect the shelf depreciation of test position, obtain abnormal signal, Ran Hougen The abnormal signal obtained according to detection determines the abnormal position in combined electrical apparatus, is located in combined electrical apparatus finally according to abnormal Position determines the defect phase of combined electrical apparatus, is easily noted that, the method for the defect of above-mentioned detection combination electrical equipment is defined Superfrequency partial discharge detection operation and partial discharge defect dipoles standard for combined electrical apparatus, are effectively improved and find combined electrical apparatus The efficiency of partial discharge defect, it is achieved thereby that improving the technique effect of the operating efficiency of testing staff, and then solves existing spy High frequency partial discharge detection method cannot effectively carry out the technical problem of partial discharge detection.
Optionally, Fig. 2 show detection test position shelf depreciation, the method for obtaining abnormal signal, as shown in Fig. 2 The method comprises the following steps:
Step S202, the ambient signal of test position is detected using superfrequency partial discharge detection instrument, and by comparing superfrequency The changing value of the amplitude size of signal, positioning obtains abnormal signal;Or,
Step S204, in the case where combined electrical apparatus is three-phase split-type structural, by many in three-phase split-type structural It is individual separate to obtain abnormal signal positioning.
In a kind of optional embodiment, when superfrequency detects the defect of doubtful partial discharge, examined using superfrequency partial discharge Survey instrument to detect detection environment, size is changed by the amplitude for contrasting ultrahigh-frequency signal, position abnormal signal, side by side division ring Border is disturbed, the interference of such as radar.It is general only in the separate middle ability of existing defects for the split type textural association electrical equipment of three-phase Detect abnormal signal, when abnormal signal than it is larger when, other in addition to defect phase are mutually likely to detect abnormal signal, this When defect phase can be can determine that by the amplitude of the relatively abnormal signal of each corresponding test position, and then defect can be determined It is separate.
Optionally, Fig. 3 show in by three-phase split-type structural it is multiple separate come position obtain abnormal signal it Method afterwards, as shown in figure 3, the method comprises the following steps:
Step S302, by the abnormal signal amplitude of relatively more multiple separate corresponding test positions, determines existing defects Phase;Or,
Step S304, by comparing each separate time difference for detecting abnormal signal, determines the phase of existing defects.
It is general only to exist in the case where combined electrical apparatus is three-phase split-type structural in a kind of optional embodiment The separate of defect can just detect abnormal signal.When abnormal signal is larger, other in addition to defect phase are mutually likely to detection To abnormal signal, now, by the abnormal signal amplitude of relatively more each corresponding test position, you can basic determination defect phase, so Afterwards by the time difference of abnormal signal detected by relatively more each phase, it may be determined that defect is separate.For Three-phase common-body textural association Electrical equipment, can first determine that synchronization is separate, then be set by changing the phase of superfrequency inspection software again, in combination with discharge signal Occur to determine defect phase in the feature of one, three quadrants.
Optionally, the method before the test position of combined electrical apparatus generation shelf depreciation to be measured is obtained is treated including acquisition The synchronizing signal of combined electrical apparatus is surveyed, wherein, synchronizing signal is used to ensure that power supply is identical with the electric voltage frequency of combined electrical apparatus, the step Including:Synchronizing signal is obtained at operation cable, or, obtaining synchronizing signal in excitation low pressure side.
In a kind of optional embodiment, station interior power or synchronous coil from operation cable B phase (synchronous coil arrows are used Synchronizing signal is obtained downwards), and carries out image retention.In non-industrial frequency experiment, synchronizing signal can be obtained from excitation low pressure side, Can be used amplifier that treatment is amplified to synchronizing signal.During detection work is carried out, if synchro source need to be changed, should Carry out image retention.
It should be noted that run cable go out to obtain synchronizing signal when, it should be ensured that the frequency of synchro source with combine electricity Device working voltage frequency is identical.
Optionally, Fig. 4 shows that the abnormal signal obtained according to detection determines the abnormal position in combined electrical apparatus Method, the method comprises the following steps:
Step S402, gathers ambient signal;
The parameter of step S404, the parameter of contrast_environment signal and the internal signal of combined electrical apparatus, wherein, ambient signal Parameter at least includes one of following:Phase and amplitude, the parameter of the internal signal of combined electrical apparatus is at least including one of following:Phase And amplitude;
Step S406, if the phase of ambient signal is identical with the phase of the internal signal of combined electrical apparatus, and environment is believed Number amplitude of the amplitude more than the internal signal of combined electrical apparatus, it is determined that the abnormal outside positioned at combined electrical apparatus to be measured, otherwise, The abnormal inside positioned at combined electrical apparatus to be measured.
In a kind of optional embodiment, when superfrequency detects doubtful partial discharge defect, first, superfrequency partial discharge is used Detector is detected to detection environment, by contrasting the amplitude size variation of ultrahigh-frequency signal, positions abnormal signal, exclusion ring Border is disturbed, such as radar chaff and external discharge.Then, by the phase of contrast_environment signal and combined electrical apparatus internal signal, Amplitude.If both phases are identical, and combined electrical apparatus inside amplitude is less than the duplication of ambient signal, this can be explained and is located at group extremely Close outside electrical equipment, otherwise, the exception is likely located at combined electrical apparatus inside (or inside the cable being connected with combined electrical apparatus).
Optionally, Fig. 5 shows a kind of method of the method for the defect of optional detection combination electrical equipment, as shown in figure 5, should Method comprises the following steps:
Step S502, the amplitude of the ultrahigh-frequency signal of contrasting detection position determines two positions of ultrahigh-frequency signal;
Step S504, the position according to time difference method and two ultrahigh-frequency signals determines the position of defect.
In a kind of optional embodiment, because ultrahigh-frequency signal has an attenuation characteristic, and the defect one of ultrahigh-frequency signal As be located between two maximum superfrequency test points of signal amplitude, therefore by the ultrahigh-frequency signal width of relatively more each test position The size of value, the position where defect is narrowed down between two superfrequency test points, i.e., in a certain air chamber.Then can be by spy High frequency time difference method is positioned to defect, in the case where that cannot be positioned using time difference method, can be by changing combination electricity The device method of operation judges the position of defect.
It should be noted that during poor method is positioned to defect when in use, can be according to actual conditions to extra-high Frequency signal is amplified, filtering process.
In an alternative embodiment, obtain combined electrical apparatus to be measured occur shelf depreciation test position it It is preceding and detection pattern to be set as " non-angular compensation ", it is necessary to assemble and start superfrequency partial discharge detection instrument, to superfrequency office Put after detector verified, complete connection.Afterwards, superfrequency partial discharge detection instrument can proper communication, can be artificial be superfrequency Partial discharge detection instrument manufactures ultrahigh-frequency signal, and through the Site Detection signal.
Embodiment 2
According to embodiments of the present invention, there is provided a kind of device embodiment of the defect of detection combination electrical equipment.
Fig. 7 is the apparatus structure schematic diagram of the defect of detection combination electrical equipment according to embodiments of the present invention, as shown in fig. 7, The device includes:Acquisition module 701, detection module 703, the first performing module 705 and the second performing module 707.Wherein, obtain , there is the test position of shelf depreciation for obtaining combined electrical apparatus to be measured in module 701;Detection module 703, for detecting The shelf depreciation of position, obtains abnormal signal;First performing module 705, the abnormal signal for being obtained according to detection determines different It is frequently located in the position in combined electrical apparatus;Second performing module 707, for determining group according to the abnormal position in combined electrical apparatus Close the defect phase of electrical equipment.
Specifically, the above-mentioned detection to shelf depreciation (i.e. partial discharge) can be the detection to superfrequency partial discharge, it is above-mentioned to be measured Combined electrical apparatus test position that shelf depreciation occurs be the test position of superfrequency.In a kind of optional embodiment, , it is necessary to interval ruuning situation each to combined electrical apparatus carries out image retention before carrying out superfrequency partial discharge detection.When to superfrequency office When putting row detection into, the test position of superfrequency can be:(if having at the nonmetallic closing of disc insulator and at cable termination Cable machinery).If disc insulator is closed for all-metal, place a sensor at grounding switch insulating part and observation window, And extra-high video sensor avoids being contacted with fastening bolt.Fig. 6 shows a kind of superfrequency partial discharge inspection of optional combined electrical apparatus Location puts notation methods figure, wherein, 1# basins, 2# basins, 3# basins, 4# basins, 5# basins and 6# basins in Fig. 6 are above-mentioned There is the test position of shelf depreciation in combined electrical apparatus.
It should be noted that the storage naming rule of superfrequency detection data is:Power transformation name of station+detection date+each combination Electrical equipment scheduling number+separate, wherein, it is separate that the common storehouse equipment of three-phase can not record detection.Additionally, superfrequency detection time is defined as: The effective detection time of each test position is no less than 30 seconds, preserves collection of illustrative plates quantity and is no less than 10, and for preserving The time of collection of illustrative plates is no less than 20 seconds.
In an alternative embodiment, the defect of combined electrical apparatus is determined according to the abnormal position in combined electrical apparatus Phase, the attenuation characteristic according to ultrahigh-frequency signal can determine the defective locations of combined electrical apparatus, and defect phase and institute is being determined Postpone in place, also defect type can be determined according to the discharge characteristic of ultrahigh-frequency signal.According to defect type and defect location result, With reference to the primary structure of combined electrical apparatus, the correctness of test result can be verified.
It should be noted that after the defect phase, defective locations and the determination defect classification that obtain combined electrical apparatus, also Need to carry out the combined electric appliance equipment that there is discharge defect image retention, and clearly each superfrequency test point position.Wherein, Influence retention requirement PRPD, PHD collection of illustrative plates are no less than 3, and in the absence of known interfering signal., it is necessary to most in detection process Limits ground keeps the clean of ambient signals, and the interference of artifactual epochs is reduced as far as possible, and detection time can be extended if necessary.Needing In the case of recording disc insulator, it then follows following numbering principle:The line segregation of combined electrical apparatus is pressed from circuit to bus, and And mother (segmentation) interval is ranked up by from small size bus to large size bus, PT intervals are by the order from PT to bus, it is determined as 1st, 2,3 ... N, wherein, the disc insulator number of three-phase separate storehouse equipment answers split-phase sequencing.
In an alternative embodiment, after the superfrequency partial discharge detection of combined electrical apparatus terminates, can be schemed according to detection Spectrum carries out live data analysis.It should be noted that should now exclude the interference signal, and partial discharge defect to existing is determined Property, quantitative analysis, and then determine the size and electric discharge type of electric discharge, and record live basic condition.In addition in superfrequency After partial discharge detection end-of-job, the power supply of superfrequency partial discharge detection instrument is first closed, then remove experiment power supply, ground wire, arranged and survey Examination cable, cleaning work scene checks again for detected combined electrical apparatus without exception.
From the foregoing, it will be observed that there is the test position of shelf depreciation by obtaining combined electrical apparatus method to be measured, and detect detecting position The shelf depreciation put, obtains abnormal signal, and the abnormal signal for then being obtained according to detection determines abnormal being located in combined electrical apparatus Position, the defect phase of combined electrical apparatus is determined finally according to the abnormal position in combined electrical apparatus, is easily noted that, on Superfrequency partial discharge detection operation and partial discharge defect that the method for the defect of detection combination electrical equipment defined for combined electrical apparatus is stated to sentence Disconnected standard, is effectively improved the efficiency of the partial discharge defect for finding combined electrical apparatus, it is achieved thereby that improving the work of testing staff The technique effect of efficiency, and then solve existing superfrequency partial discharge detection method and cannot effectively carry out the technology of partial discharge detection Problem.
Optionally, detection module includes:First locating module and the second locating module.Wherein, the first locating module, is used for The ambient signal of test position is detected using superfrequency partial discharge detection instrument, and by comparing the change of the amplitude size of ultrahigh-frequency signal Change value, positioning obtains abnormal signal;Or, the second locating module, in the case of being three-phase split-type structural in combined electrical apparatus, Abnormal signal is obtained positioning by multiple separate in three-phase split-type structural.
Optionally, detection module also includes:First contrast module and the second contrast module.Wherein, the first contrast module, uses In the abnormal signal amplitude by relatively more multiple separate corresponding test positions, the phase of existing defects is determined;Or, second pair Than module, for by comparing each separate time difference for detecting abnormal signal, determining the phase of existing defects.
Optionally, the device of the defect of above-mentioned detection combination electrical equipment also includes:Signal acquisition module.Wherein, signal acquisition Module, the synchronizing signal for obtaining combined electrical apparatus to be measured, wherein, synchronizing signal is used to ensure the voltage of power supply and combined electrical apparatus Frequency is identical, and signal acquisition module includes:Synchronous signal obtaining module, for obtaining synchronizing signal at operation cable, or, Excitation low pressure side obtains synchronizing signal.
Optionally, the first performing module includes:Acquisition module, parameter comparison module and the 3rd locating module.Wherein, gather Module is used to gather ambient signal;Parameter and the internal signal of combined electrical apparatus of the parameter comparison module for contrast_environment signal Parameter, wherein, the parameter of ambient signal is at least including one of following:Phase and amplitude, the parameter of the internal signal of combined electrical apparatus At least include one of following:Phase and amplitude;If the phase that the 3rd locating module is used for ambient signal is interior with combined electrical apparatus The phase of portion's signal is identical, and ambient signal amplitude more than combined electrical apparatus internal signal amplitude, it is determined that exception bits In the outside of combined electrical apparatus to be measured, otherwise, the abnormal inside positioned at combined electrical apparatus to be measured.
Optionally, the device of the defect of above-mentioned detection combination electrical equipment also includes:Amplitude contrast module and the 4th locating module. Wherein, amplitude contrast module is used for the amplitude of the ultrahigh-frequency signal of contrasting detection position, determines two positions of ultrahigh-frequency signal; 4th locating module is used to determine according to the position of time difference method and two ultrahigh-frequency signals the position of defect.
The embodiments of the present invention are for illustration only, and the quality of embodiment is not represented.
In the above embodiment of the present invention, the description to each embodiment all emphasizes particularly on different fields, and does not have in certain embodiment The part of detailed description, may refer to the associated description of other embodiment.
In several embodiments provided herein, it should be understood that disclosed technology contents, can be by other Mode is realized.Wherein, device embodiment described above is only schematical, such as division of described unit, Ke Yiwei A kind of division of logic function, can there is other dividing mode when actually realizing, such as multiple units or component can combine or Person is desirably integrated into another system, or some features can be ignored, or does not perform.Another, shown or discussed is mutual Between coupling or direct-coupling or communication connection can be the INDIRECT COUPLING or communication link of unit or module by some interfaces Connect, can be electrical or other forms.
The unit that is illustrated as separating component can be or may not be it is physically separate, it is aobvious as unit The part for showing can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple On unit.Some or all of unit therein can be according to the actual needs selected to realize the purpose of this embodiment scheme.
In addition, during each functional unit in each embodiment of the invention can be integrated in a processing unit, it is also possible to It is that unit is individually physically present, it is also possible to which two or more units are integrated in a unit.Above-mentioned integrated list Unit can both be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.
If the integrated unit is to realize in the form of SFU software functional unit and as independent production marketing or use When, can store in a computer read/write memory medium.Based on such understanding, technical scheme is substantially The part for being contributed to prior art in other words or all or part of the technical scheme can be in the form of software products Embody, the computer software product is stored in a storage medium, including some instructions are used to so that a computer Equipment (can be personal computer, server or network equipment etc.) perform each embodiment methods described of the invention whole or Part steps.And foregoing storage medium includes:USB flash disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD etc. are various can be with store program codes Medium.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should It is considered as protection scope of the present invention.

Claims (12)

1. a kind of method of the defect of detection combination electrical equipment, it is characterised in that including:
Obtain the test position that combined electrical apparatus to be measured occurs shelf depreciation;
The shelf depreciation of the test position is detected, abnormal signal is obtained;
Detect that the abnormal signal for obtaining determines the abnormal position in the combined electrical apparatus according to described;
The position being located in the combined electrical apparatus according to the exception determines the defect phase of the combined electrical apparatus.
2. method according to claim 1, it is characterised in that the shelf depreciation of the detection test position, obtains exception Signal, including:
The ambient signal of the test position is detected using superfrequency partial discharge detection instrument, and by comparing the amplitude of ultrahigh-frequency signal The changing value of size, positioning obtains the abnormal signal;Or,
In the case where the combined electrical apparatus is three-phase split-type structural, by multiple separate in the three-phase split-type structural The abnormal signal is obtained to position.
3. method according to claim 2, it is characterised in that multiple separate in by the three-phase split-type structural Come after positioning and obtaining the abnormal signal, methods described also includes:
By the abnormal signal amplitude of relatively more the multiple separate corresponding test position, the phase of existing defects is determined;Or,
By compare each it is separate detect the time difference of the abnormal signal, it is determined that there is the phase of the defect.
4. method according to claim 1, it is characterised in that the inspection of shelf depreciation occurs combined electrical apparatus to be measured is obtained Before location is put, methods described also includes:
The synchronizing signal of combined electrical apparatus to be measured is obtained, wherein, the synchronizing signal is used to ensure power supply and the combined electrical apparatus Electric voltage frequency is identical, and the step includes:
The synchronizing signal is obtained at operation cable, or, obtaining the synchronizing signal in excitation low pressure side.
5. method according to claim 2, it is characterised in that detect that the abnormal signal for obtaining determines exception bits according to described Position in the combined electrical apparatus, including:
Gather the ambient signal;
The parameter of the ambient signal and the parameter of the internal signal of the combined electrical apparatus are contrasted, wherein, the ambient signal Parameter at least includes one of following:Phase and amplitude, the parameter of the internal signal of the combined electrical apparatus is at least including one of following: Phase and amplitude;
If the phase of the ambient signal is identical with the phase of the internal signal of the combined electrical apparatus, and the ambient signal Amplitude of the amplitude more than the internal signal of the combined electrical apparatus, it is determined that the exception is located at the combined electrical apparatus to be measured Outside, otherwise, the exception is located at the inside of the combined electrical apparatus to be measured.
6. method according to claim 1, it is characterised in that methods described also includes:
The amplitude of the ultrahigh-frequency signal of the test position is contrasted, two positions of the ultrahigh-frequency signal are determined;
Position according to time difference method and two ultrahigh-frequency signals determines the position of the defect.
7. a kind of device of the defect of detection combination electrical equipment, it is characterised in that including:
, there is the test position of shelf depreciation for obtaining combined electrical apparatus to be measured in acquisition module;
Detection module, the shelf depreciation for detecting the test position, obtains abnormal signal;
First performing module, for detecting that the abnormal signal for obtaining determines the abnormal position in the combined electrical apparatus according to described Put;
Second performing module, the position for being located in the combined electrical apparatus according to the exception determines lacking for the combined electrical apparatus Fall into phase.
8. device according to claim 7, it is characterised in that the detection module includes:
First locating module, the ambient signal for detecting the test position using superfrequency partial discharge detection instrument, and by than To the changing value of the amplitude size of ultrahigh-frequency signal, positioning obtains the abnormal signal;Or,
Second locating module, in the case of being three-phase split-type structural in the combined electrical apparatus, by the three-phase split Multiple separate in formula structure obtains the abnormal signal positioning.
9. device according to claim 8, it is characterised in that the detection module also includes:
First contrast module, for the abnormal signal amplitude by relatively more the multiple separate corresponding test position, it is determined that depositing In the phase of defect;Or,
Second contrast module, for by compare each it is separate detect the time difference of the abnormal signal, it is determined that exist it is described lack Sunken phase.
10. device according to claim 7, it is characterised in that described device also includes:
Signal acquisition module, the synchronizing signal for obtaining combined electrical apparatus to be measured, wherein, the synchronizing signal is used to ensure power supply Electric voltage frequency with the combined electrical apparatus is identical, and the signal acquisition module includes:
Synchronous signal obtaining module, for obtaining the synchronizing signal at operation cable, or, obtaining institute in excitation low pressure side State synchronizing signal.
11. devices according to claim 8, it is characterised in that first performing module includes:
Acquisition module, for gathering the ambient signal;
Parameter comparison module, for contrasting the parameter of the ambient signal and the parameter of the internal signal of the combined electrical apparatus, its In, the parameter of the ambient signal is at least including one of following:Phase and amplitude, the parameter of the internal signal of the combined electrical apparatus At least include one of following:Phase and amplitude;
3rd locating module, if the phase phase of phase and the internal signal of the combined electrical apparatus for the ambient signal Together, and the ambient signal amplitude more than the combined electrical apparatus internal signal amplitude, it is determined that the exception is located at The outside of the combined electrical apparatus to be measured, otherwise, the exception is located at the inside of the combined electrical apparatus to be measured.
12. devices according to claim 7, it is characterised in that described device also includes:
Amplitude contrast module, the amplitude of the ultrahigh-frequency signal for contrasting the test position determines two superfrequency letters Number position;
4th locating module, the position for determining the defect according to the position of time difference method and two ultrahigh-frequency signals Put.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109633395A (en) * 2019-01-24 2019-04-16 保定华创电气有限公司 A kind of measurement of local discharge signal and localization method

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08152453A (en) * 1994-11-28 1996-06-11 Sumitomo Electric Ind Ltd Measuring method for partial discharge
JP2006017753A (en) * 2004-06-30 2006-01-19 Meidensha Corp Device and method for detecting abnormal noise
WO2010023570A1 (en) * 2008-08-25 2010-03-04 Eskom Holdings (Pty) Ltd Partial discharge monitor
CN101702002A (en) * 2009-12-07 2010-05-05 上海市电力公司 Local discharge electroacoustic united detection positioning system and positioning method thereof
CN101865969A (en) * 2010-05-26 2010-10-20 四川电力试验研究院 Method for on-line monitoring and positioning of partial discharge of gas insulation combined electrical apparatus
CN103744006A (en) * 2014-01-07 2014-04-23 海南金海浆纸业有限公司 Localization diagnosis method for partial discharge generated by looseness in high-voltage electrical equipment
CN104483602A (en) * 2014-11-28 2015-04-01 北京兴迪仪器有限责任公司 Local discharge signal identification method and device
CN105021958A (en) * 2014-07-27 2015-11-04 国家电网公司 Switch cabinet partial discharge data recording and analyzing method based on multi-sensor detection
CN105606975A (en) * 2016-03-09 2016-05-25 武汉华威众科电力有限公司 Localizable ultrahigh-frequency cable partial discharge detection method and device
CN105759187A (en) * 2016-04-18 2016-07-13 国网辽宁省电力有限公司电力科学研究院 Combined electric apparatus partial discharge multi-information fusion diagnostic device

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08152453A (en) * 1994-11-28 1996-06-11 Sumitomo Electric Ind Ltd Measuring method for partial discharge
JP2006017753A (en) * 2004-06-30 2006-01-19 Meidensha Corp Device and method for detecting abnormal noise
WO2010023570A1 (en) * 2008-08-25 2010-03-04 Eskom Holdings (Pty) Ltd Partial discharge monitor
CN101702002A (en) * 2009-12-07 2010-05-05 上海市电力公司 Local discharge electroacoustic united detection positioning system and positioning method thereof
CN101865969A (en) * 2010-05-26 2010-10-20 四川电力试验研究院 Method for on-line monitoring and positioning of partial discharge of gas insulation combined electrical apparatus
CN103744006A (en) * 2014-01-07 2014-04-23 海南金海浆纸业有限公司 Localization diagnosis method for partial discharge generated by looseness in high-voltage electrical equipment
CN105021958A (en) * 2014-07-27 2015-11-04 国家电网公司 Switch cabinet partial discharge data recording and analyzing method based on multi-sensor detection
CN104483602A (en) * 2014-11-28 2015-04-01 北京兴迪仪器有限责任公司 Local discharge signal identification method and device
CN105606975A (en) * 2016-03-09 2016-05-25 武汉华威众科电力有限公司 Localizable ultrahigh-frequency cable partial discharge detection method and device
CN105759187A (en) * 2016-04-18 2016-07-13 国网辽宁省电力有限公司电力科学研究院 Combined electric apparatus partial discharge multi-information fusion diagnostic device

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JUN XUE等: "Research on a Method for GIS Partial Discharge Pattern Recognition Based on Polar Coordinate Map", 《2016 IEEE INTERNATIONAL CONFERENCE ON HIGH VOLTAGE ENGINEERING AND APPLICATION (ICHVE)》 *
卢毅等: "GIS在线检测中局部放电和外部干扰信号的识别", 《电力自动化设备》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109633395A (en) * 2019-01-24 2019-04-16 保定华创电气有限公司 A kind of measurement of local discharge signal and localization method

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