CN106569110A - Intelligent switchgear monitoring method - Google Patents
Intelligent switchgear monitoring method Download PDFInfo
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- CN106569110A CN106569110A CN201610958050.XA CN201610958050A CN106569110A CN 106569110 A CN106569110 A CN 106569110A CN 201610958050 A CN201610958050 A CN 201610958050A CN 106569110 A CN106569110 A CN 106569110A
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- Prior art keywords
- discharge
- monitoring method
- intelligent switchboard
- signal
- electromagnetic signal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—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
- G01R31/1227—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 of components, parts or materials
- G01R31/1263—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 of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention comprises an intelligent switchgear monitoring method. The method comprises the steps that S1 a number of ultrasonic sensors are used to carry out simulation grid model dividing on an intelligent switchgear to form a number of cells, and a three-dimensional coordinate system is established; S2 a high-frequency sensor unit is used to receive partial discharge in the switchgear to generate a high frequency electromagnetic signal; S3 after the received high frequency electromagnetic signal is processed, discharge characteristic parameters are extracted, and the discharge type and the approximate discharge position are determined according to the discharge characteristic parameters; and S4 the approximate discharge position corresponds to a three-dimensional coordinate system, and the approximate coordinate of the discharge position is output to give an alarm. According to the invention, type identifying is carried out for the partial discharge characteristics of the switchgear; a discharge point is accurately positioned for timely processing; and faults of a switchgear electrical device can be prevented.
Description
Technical field
The invention belongs to power monitoring technical field, more particularly to a kind of intelligent switchboard monitoring method.
Background technology
At present, 10KV, 35KV high-tension switch cabinet complete set of equipments having been widely used in power system, is power system
In very important electrical equipment, its reliability service is directly connected to the quality of power supply of power system and the reliability of power supply
Property.Due to the impact that there is the factor such as electricity, heat, chemistry, electrical equipment certainly exists insulation degradation phenomenon in longtime running, enters
And cause shelf depreciation.Constantly spreading and developing for shelf depreciation accident, will cause the damage of insulation, if developed as one pleases most
Insulation can be caused at last to lose dielectric properties, cause serious accident, destroy the safety and stability ability of system.According to 1998-
National Power System 6-10KV switch cubicle accident statistics between 2002, switch cubicle and explosion accident happen occasionally, and wherein insulate
The 40.2% of sum is accounted for the failure that current carrying part causes, the accident that the flashover of insulated part is caused accounts for insulation fault sum
79%, therefore the research and monitoring to high-tension switch cabinet shelf depreciation has great importance.
For high-tension switch cabinet, current detection method, the system of periodic inspection is typically with.But, this method
Time between overhauls(TBO) is long, it is impossible to the defect occurred between timely finding to overhaul twice, it is also possible to not having faulty overhaul of the equipments
Excessively, the waste of resource and the increase of cost are caused.In addition, switch cubicle generation at present is more and more compacter, insulation margin is increasingly
Little, especially larger in southern air themperature, in high-voltage switch cabinet, there is exception if any electric discharge in equipment, and operations staff is patrolled in equipment
The failure of internal unit is hardly visible depending on during often, therefore, to high-voltage switch gear cabinet equipment except carrying out appropriate regular inspection
Repair outer, in addition it is also necessary to which the state which runs is overhauled.
Therefore, need now a kind of intelligent switchboard monitoring method badly, the characteristic that can be directed to partial discharge of switchgear is carried out
Type identification, is accurately positioned to point of discharge, to be processed in time, reaches prevention switch cubicle electrical equipment and breaks down
Purpose.
The content of the invention
The present invention proposes a kind of intelligent switchboard monitoring method, solves the problems of the prior art.
The technical scheme is that what is be achieved in that：Intelligent switchboard monitoring method, comprises the steps：
S1：If carrying out emulation grid model using some ultrasonic sensors to be divided into without cellular to intelligent switchboard, build
Vertical three-dimensional system of coordinate；
S2:The high-frequency electromagnetic signal that the shelf depreciation in switch cubicle is produced is received using high frequency sensors unit；
S3：After high-frequency electromagnetic signal to receiving is processed, discharge characteristic parameter is extracted, joined according to the discharge characteristic
Number, determines electric discharge type and approximate discharge position；
S4:Approximate discharge position and three-dimensional system of coordinate are carried out corresponding, the approximate coordinate of output discharge position, and is reported
It is alert.
As one kind preferred embodiment, in step S1, some ultrasound wave quantity are eight, are respectively arranged at described opening
Close on eight summits of cabinet.
As one kind preferred embodiment, carrying out process to electromagnetic signal in step S3 includes, electromagnetic signal is carried out
After filter and amplification and signal biasing, then analog digital conversion is carried out, electromagnetic signal is converted to into digital signal, frequency spectrum is finally carried out and is removed
Frequency spectrum is moved and recovered, spectrum signal is extracted.
As one kind preferred embodiment, the electric discharge type includes needle plate discharging model, internal discharge model, suspends
In discharging model and creeping discharge model any one or it is several.
Preferred embodiment amplify after being filtered to electromagnetic signal as a kind of, including being entered using broadband amplifier
Row amplifies, and will amplify result by oscilloscope display detection waveform.
As one kind preferred embodiment, reported to the police in step S4, also include, when switch cubicle power down, carrying out
Power down police instruction.
As one kind preferred embodiment, frequency spectrum shift is carried out to electromagnetic signal, including to input signal and local oscillator
Signal is multiplied, and is obtained output signal, and is filtered high-frequency signal.
As one kind preferred embodiment, the needle plate discharging model is expressed as：Its high pressure needle type radius is
0.6mm, the needle point long 15mm of point, between needle plate, air-gap separation is 8mm, and the internal discharge model includes upper and lower two thickness 5mm
Epoxy resin board, the middle epoxy resin board for thickness 1mm is used as insulating medium layer, and opens diameter 10mm's in insulating medium layer
Circular hole, is bondd using epoxide-resin glue between epoxy resin board and insulating medium layer；The ground electrode of the suspended discharge model
One diameter 60mm of upper setting, the thick epoxy resin board for 5mm arrange diameter at close high-field electrode above epoxy resin board
10mm, the copper post of height 10mm；Rotation between two electrodes of the creeping discharge model has diameter 10mm, and length is 10mm's
Epoxy resin rod.
As one kind preferred embodiment, it is determined that approximate discharge position also includes producing pulse current using the wave of oscillation,
When shelf depreciation is produced, changed using transient voltage, be coupled in detection impedance through coupled capacitor and produce pulse current, will
Pulse current is acquired, amplifies display processing, determines Partial Discharge；Pulse matching is carried out to discharge waveform, selects accurate
True pulse matching result carries out location Calculation, determines discharge position.
Preferred embodiment determine discharge position, also include being analyzed measured data as a kind of, extract and
With incidence-reflected impulse pair, the positioning of the source of trouble is completed, generate discharge position spectrogram, and the discharge position spectrogram includes three
Phase discharge spectrogram.
After employing above-mentioned technical proposal, the invention has the beneficial effects as follows：The present invention is by presetting discharging model, Ke Nengtong
The pulse matching of overdischarge discharging model, determines electric discharge type and discharge position, also, sets up switch cubicle by using sensor
Three-dimensional cellular, set up three-dimensional coordinate system, positioning that can quickly to the fluctuation that carries out discharging in switch cubicle, and export and show
Show, realize the monitoring of intelligent switchboard.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
As shown in figure 1, intelligent switchboard monitoring method, comprises the steps：
S1：If carrying out emulation grid model using some ultrasonic sensors to be divided into without cellular to intelligent switchboard, build
Vertical three-dimensional system of coordinate；
S2:The high-frequency electromagnetic signal that the shelf depreciation in switch cubicle is produced is received using high frequency sensors unit；
S3：After high-frequency electromagnetic signal to receiving is processed, discharge characteristic parameter is extracted, joined according to the discharge characteristic
Number, determines electric discharge type and approximate discharge position；
S4:Approximate discharge position and three-dimensional system of coordinate are carried out corresponding, the approximate coordinate of output discharge position, and is reported
It is alert.
In step S1, some ultrasound wave quantity are eight, are respectively arranged on eight summits of the switch cubicle.
Process is carried out to electromagnetic signal in step S3 includes, after amplification and signal biasing are filtered to electromagnetic signal,
Analog digital conversion is carried out again, electromagnetic signal is converted to into digital signal, finally carried out frequency spectrum shift and recover frequency spectrum, extract frequency spectrum letter
Number.
The electric discharge type includes needle plate discharging model, internal discharge model, suspended discharge model and creeping discharge mould
In type any one or it is several.
Amplify after being filtered to electromagnetic signal, including being amplified using broadband amplifier, and pass through result is amplified
Oscilloscope shows detection waveform.
Reported to the police in step S4, also include, when switch cubicle power down, carrying out power down police instruction.
Frequency spectrum shift is carried out to electromagnetic signal, including being multiplied to input signal and local oscillation signal, output letter is obtained
Number, and filter high-frequency signal.
The needle plate discharging model is expressed as：Its high pressure needle type radius is 0.6mm, the needle point long 15mm of point, needle plate it
Between air-gap separation be 8mm, the internal discharge model includes the epoxy resin board of upper and lower two thickness 5mm, the middle ring for thickness 1mm
Oxygen resin plate is used as insulating medium layer, and the circular hole of diameter 10mm is opened in insulating medium layer, epoxy resin board and dielectric
Bondd using epoxide-resin glue between layer；One diameter 60mm is set on the ground electrode of the suspended discharge model, and thick is 5mm
Epoxy resin board, diameter 10mm, the copper post of height 10mm are set at the high-field electrode above epoxy resin board；It is described along face
Rotation between two electrodes of discharging model has diameter 10mm, epoxy resin rod of the length for 10mm.
It is determined that approximate discharge position also includes producing pulse current using the wave of oscillation, when shelf depreciation is produced, using wink
Between change in voltage, through coupled capacitor be coupled to detection impedance on produce pulse current, pulse current is acquired, amplifies show
Show process, determine Partial Discharge；Pulse matching is carried out to discharge waveform, selects accurate pulse matching result to be positioned
Calculate, determine discharge position.
Determine discharge position, also include being analyzed measured data, extract and match incidence-reflected impulse pair, complete
The positioning of the source of trouble, generates discharge position spectrogram, and the discharge position spectrogram includes three-phase discharge spectrum.
The intelligent switchboard monitoring method, by presetting discharging model, may pass through the pulse matching of electric discharge discharging model,
Determine electric discharge type and discharge position, also, the three-dimensional cellular of switch cubicle is set up by using sensor, set up three-dimensional coordinate
System, can quickly to the positioning of electric discharge fluctuation is carried out in switch cubicle, and output display realizes the monitoring of intelligent switchboard.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (10)
1. a kind of intelligent switchboard monitoring method, it is characterised in that comprise the steps：
S1：If emulation grid model is carried out using some ultrasonic sensors to be divided into without cellular to intelligent switchboard, set up three
Dimension coordinate system；
S2:The high-frequency electromagnetic signal that the shelf depreciation in switch cubicle is produced is received using high frequency sensors unit；
S3：After high-frequency electromagnetic signal to receiving is processed, discharge characteristic parameter is extracted, according to the discharge characteristic parameter,
Determine electric discharge type and approximate discharge position；
S4:Approximate discharge position and three-dimensional system of coordinate are carried out corresponding, the approximate coordinate of output discharge position, and is reported to the police.
2. intelligent switchboard monitoring method according to claim 1, it is characterised in that in step S1, some ultrasonic wave numbers
Measure as eight, be respectively arranged on eight summits of the switch cubicle.
3. intelligent switchboard monitoring method according to claim 2, it is characterised in that electromagnetic signal is carried out in step S3
Process includes, after amplification and signal biasing are filtered to electromagnetic signal, then carries out analog digital conversion, electromagnetic signal is converted to
Digital signal, finally carries out frequency spectrum shift and recovers frequency spectrum, extracts spectrum signal.
4. intelligent switchboard monitoring method according to claim 3, it is characterised in that the electric discharge type includes that needle plate is put
In electric model, internal discharge model, suspended discharge model and creeping discharge model any one or it is several.
5. intelligent switchboard monitoring method according to claim 4, it is characterised in that put after being filtered to electromagnetic signal
Greatly, including being amplified using broadband amplifier, and result will be amplified shown by oscilloscope and detect waveform.
6. intelligent switchboard monitoring method according to claim 5, it is characterised in that reported to the police in step S4,
Also include, when switch cubicle power down, carrying out power down police instruction.
7. intelligent switchboard monitoring method according to claim 6, it is characterised in that frequency spectrum is carried out to electromagnetic signal and is removed
Move, including being multiplied to input signal and local oscillation signal, obtain output signal, and filter high-frequency signal.
8. intelligent switchboard monitoring method according to claim 7, it is characterised in that the needle plate discharging model table
It is shown as：Its high pressure needle type radius is 0.6mm, the needle point long 15mm of point, and between needle plate, air-gap separation is 8mm, the internal discharge mould
Type includes the epoxy resin board of upper and lower two thickness 5mm, the middle epoxy resin board for thickness 1mm as insulating medium layer, and exhausted
The circular hole of diameter 10mm is opened in edge dielectric layer, is bondd using epoxide-resin glue between epoxy resin board and insulating medium layer；It is described
One diameter 60mm is set on the ground electrode of suspended discharge model, and the thick epoxy resin board for 5mm is leaned on above epoxy resin board
At nearly high-field electrode, diameter 10mm, the copper post of height 10mm are set；Rotating between two electrodes of the creeping discharge model has
Diameter 10mm, epoxy resin rod of the length for 10mm.
9. intelligent switchboard monitoring method according to claim 8, it is characterised in that it is determined that approximate discharge position also includes
Pulse current is produced using the wave of oscillation, when shelf depreciation is produced, is changed using transient voltage, inspection is coupled to through coupled capacitor
Survey and pulse current is produced in impedance, pulse current is acquired, amplifies display processing, determine Partial Discharge；To electric discharge
Waveform carries out pulse matching, selects accurate pulse matching result to carry out location Calculation, determines discharge position.
10. intelligent switchboard monitoring method according to claim 9, it is characterised in that determine discharge position, it is right also to include
Measured data is analyzed, and extracts and match incidence-reflected impulse pair, completes the positioning of the source of trouble, generates discharge position spectrogram,
And the discharge position spectrogram includes three-phase discharge spectrum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610958050.XA CN106569110A (en) | 2016-11-03 | 2016-11-03 | Intelligent switchgear monitoring method |
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| CN201610958050.XA CN106569110A (en) | 2016-11-03 | 2016-11-03 | Intelligent switchgear monitoring method |
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| CN106569110A true CN106569110A (en) | 2017-04-19 |
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| CN201610958050.XA Pending CN106569110A (en) | 2016-11-03 | 2016-11-03 | Intelligent switchgear monitoring method |
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| CN110741266A (en) * | 2017-06-07 | 2020-01-31 | 维迪科研究所 | Method and apparatus for fault detection and protection of power switch electronics |
| CN114325253A (en) * | 2021-11-22 | 2022-04-12 | 国网山东省电力公司电力科学研究院 | Partial discharge identification method and system for gas insulated metal enclosed switchgear |
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Application publication date: 20170419 |