CN109459674A - A kind of partial discharge of switchgear multinode monitoring system synchronization device - Google Patents
A kind of partial discharge of switchgear multinode monitoring system synchronization device Download PDFInfo
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- CN109459674A CN109459674A CN201811622480.XA CN201811622480A CN109459674A CN 109459674 A CN109459674 A CN 109459674A CN 201811622480 A CN201811622480 A CN 201811622480A CN 109459674 A CN109459674 A CN 109459674A
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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
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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
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Abstract
The invention discloses a kind of synchronising apparatus for partial discharge of switchgear multinode wireless monitor system, synchronization signal emission mode is entered by control mode switch switch using host node processor unit, pulse emits wireless synchronization signal to each sub- monitoring node by antenna；After every sub- monitoring node receives the synchronization pulse that main monitoring node issues, AD conversion unit is quickly triggered via child node signal conditioning unit, measure local discharge signal, then host node processor unit is sent to for signal is acquired by child node number communication unit, realize the synchronization monitoring for the multiple sub- monitoring nodes being mounted on multi-panel switchgear, solve the problems, such as that current switch cabinet shelf depreciation wireless monitor technical field always existed can not accurately obtain local discharge signal timing and voltage phase information, structure is simple, directly solid technical foundation has been established for the positioning of shelf depreciation and the pattern-recognition of the shelf depreciation based on voltage phase information.
Description
Technical field
The present invention relates to the development of the relevant devices such as power equipment state monitoring, electric power asset management, technological development and answer
With field, and in particular to a kind of partial discharge of switchgear multinode monitoring system synchronization device.
Background technique
High-tension switch cabinet measures as a kind of collection, controls, is protected in integrated power equipment, in power plant, middle pressure and height
Buckling power station is largely installed, and the distribution and metering of safe operation and electric energy for power grid play vital effect.In view of
This, for many years to the monitoring of high-tension switch cabinet self-operating state and diagnosis be always scientific research institutions, monitoring device manufacturing enterprise,
Power generation and the project of power grid enterprises' concern, propose multi-Monitoring Techniques in succession.Wherein, based on ground electric wave (TEV,
Transient Earth Voltage) switch cabinet partial discharge detection technique with ultrasonic (AA, Airborne Acoustic) measurement
Most commonly used applicating and exploitation has been obtained for many years.In terms of product, in the past 30 years, using the Britain EA of Correlative measurement method
The product of Technology is worldwide widely applied.
From on the basis of introductions of foreign technology in 2006 and product, equipment manufacturing enterprise in China's was had developed similar in recent years
Product, and obtain a degree of approval and application at home.Since 2015, relevant departments, China propose distributed right
Node wireless monitoring technology, and have developed corresponding product.Have the advantages that scene is easy to implement in view of it, obtains electric power
Production and the preliminary approval of power grid enterprises.However, small-scale application shows: that there is anti-interference abilities is weak, difficult for this technology
It there are the switchgear face of shelf depreciation hidden danger and is difficult to carry out the side such as profound insulation diagnosis and risk assessment with timely positioning
The problem of face, hinders its further genralrlization application.
Summary of the invention
The purpose of the present invention is to provide a kind of partial discharge of switchgear multinodes to monitor system synchronization device, to overcome
The deficiencies in the prior art.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
A kind of partial discharge of switchgear multinode monitoring system synchronization device, including Master node element and child node list
Member, Master node element include host node processor unit and the host node pulse generation list connecting with host node processor unit
Member, host node digital communication unit and host node display unit, host node impulse generating unit and host node digital communication unit
It is connected with host node mode selector switch unit simultaneously, host node mode selector switch unit is connected with host node antenna element；
Child node unit includes child node AD conversion unit and the child node signal condition connecting with child node AD conversion unit
Unit and child node microprocessor unit, child node microprocessor unit are connected with child node number communication unit, son node number
Word communication unit and child node signal conditioning unit are connected with child node mode selector switch unit, child node pattern switching simultaneously
Switch unit is connected with child node antenna element, and child node AD conversion unit is connected to child node test object and its conditioning electricity
Road；
Host node processor unit for control host node mode selector switch unit switching synchronization signal emission mode and
The movement of host node impulse generating unit generating unit is controlled, host node digital communication unit is used for host node processor unit and master
It is communicated between node mode switching switch unit；
Host node impulse generating unit generates unit pulse signal；
Host node mode selector switch unit is received for signal sends switching, and host node antenna element is used for unit pulse
Signal transmitting and digital communication, host node processor unit realize digital signal reception and processing by host node antenna element；
Child node antenna element receives for realizing unit pulse signal and digital communication, and child node signal conditioning unit is used
In conditioning unit pulse signal；Child node mode selector switch unit is for change detection child node test object and its conditioning electricity
Road, realizes the measurement of local discharge signal, and the local discharge signal that child node microprocessor unit is used to measure passes through son section
The digital communication unit of point and child node antenna element are transmitted to Master node element.
Further, host node antenna element is identical with child node antenna unit structure, all uses single retractable aerial,
Model FR150, gain 6dB, standing-wave ratio < 1dB.
Further, host node digital communication unit and child node number communication unit include modulation-demodulation circuit and letter
Number transmitting receives circuit, and modulation system uses mode of frequency regulation, and carrier frequency 2GHz, modulation-demodulation circuit is using the vibration of controllable multi-resonant
It swings device circuit and realizes frequency modulation(PFM)；It includes radio-frequency power amplifier and its driving circuit, radio-frequency power that signal transmitting, which receives circuit,
Amplifier uses HMC580, realizes that signal power amplifies 40dB.
Further, the host node processor unit and child node microprocessor unit use embedded microprocessor
ARM。
Further, the child node test object and its conditioning circuit include place wave sensing, ultrasonic sensor, filter
Wave circuit and peak-holding circuit；The preamplifier of place wave sensor uses ultra-low noise high speed amplifier AD4899-1, preceding
50 times of amplifier magnification ratio are set, bandwidth 0-100MHz, common-mode rejection ratio 100dB；The pre-amplification circuit of ultrasonic sensor
Using ultra-low-distortion precision operational-amplifier LT1126,50 times of amplification factor, bandwidth 0-1MHz, common-mode rejection ratio 100dB；Filtering
Circuit uses active Chebyshev's bandpass filter, then band connection frequency 20kHz-1MHz, 1MHz-50MHz；Peak-holding circuit is direct
Using envelope/peak detector LTC5507, peak-holding circuit is for realizing down sample, 1 μ of retention time of peak-holding circuit
s。
Further, host node mode selector switch unit includes high frequency relay and driving circuit；High frequency relay is adopted
Switch, upper cut-off frequency 3GHz, movement speed 20ms, driving voltage 15V are set with TIS2 hilted broadsword is double；Driving circuit pulse rises
1 μ s of time, driving current are greater than 1A；High frequency relay passes through synchronization pulse cable, data communication cable and driving respectively
Signal cable is connect with host node impulse generating unit, host node digital communication unit and host node antenna element.
Further, driving circuit includes the junction type field-effect tube D1 that grid connects control signal, junction type field-effect tube
The source electrode of D1 is grounded, drain electrode one end connecting resistance R of junction type field-effect tube D1, the grid of enhanced field-effect tube S1 and enhanced
The drain electrode of the grid of field-effect tube S2, the source electrode of enhanced field-effect tube S1 and enhanced field-effect tube S2 meets inductance L mono- simultaneously
End, drain electrode, diode d1 cathode, diode d3 cathode and the one end resistance R2 of another enhanced field-effect tube S1 of termination of resistance R；
Source electrode, diode d2 anode, diode d4 anode, the one end capacitor C and the junction type field-effect tube D2 of enhanced field-effect tube S2
Source electrode ground connection, it is another that diode d4 cathode, diode d3 anode, the capacitor C other end and junction type field-effect tube D2 grid meet inductance L
One end, diode d1 anode and diode d2 cathode connect the one end inductance L, and junction type field-effect tube D2 drain electrode connecting resistance R2 is another
End.
Further, host node impulse generating unit includes high-voltage charging circuit, electrion circuit, photoelectric coupling electricity
Road, power module and operating frequency phase detector；
Power module uses numerical-control direct-current source of stable pressure；High-voltage charging circuit includes middle piezoelectricity source module, resistance R1, capacitor C1
With resistance R2, piezoelectricity source module output cathode, the one end another termination capacitor C1 resistance R1 and electricity in mono- terminating resistor R1 of resistance R1
Hinder the one end R2, piezoelectricity source module output negative pole in the capacitor C1 other end and another termination of resistance R2；
Capacitor discharge loop includes resistance R3, diode D1, inductance L and field-effect tube S3, the one end resistance R3 and resistance R1
Other end connection, another terminating diode D1 anode of resistance R3, diode D1 cathode connect the one end inductance L, another termination field inductance L
Effect pipe S3 source electrode, field-effect tube S3 drain electrode connect the capacitor C1 other end, and inductance L two terminates output cord；
Optocoupler driving circuit includes photoelectric coupling chip, resistance R4 and resistance R5, the light-emitting component side of photoelectric coupling chip
Positive and negative anodes connect operating frequency phase detector, and the collector of the photosensitive side of photoelectric coupling chip connects 15V power supply, photoelectric coupling chip
Photosensitive side emitter connecting resistance R5 one end, another termination field-effect tube S3 grid and resistance R4 mono- of resistance R5
End, another termination field-effect tube S3 drain electrode of resistance R4；
Operating frequency phase detector includes positive going zeror crossing comparator and divider, and positive going zeror crossing comparator has enable port.
Further, child node AD conversion unit includes lock-out pulse conditioning circuit, TEV sensor and AA sensor tune
Manage circuit, controllable A/D converter and processor；Lock-out pulse conditioning circuit includes filter circuit and monostable flipflop, filtering
Circuit filters out the interference of other frequency signals, monostable flipflop is for realizing same for realizing the bandpass filtering of 1MHz-50MHz
Pace pulse shaping, steady-state residence time 20ms, when the identification of unit pulse signal is effective, triggering A/D capture card examines sensor
Measured data is acquired；TEV sensor and AA Conditioning Circuits of Sensor include filtering and amplifying circuit and peak-holding circuit, preceding storing
Big at least 50 times of amplification factor of device, filtering and amplifying circuit use active band-pass filter, band connection frequency 20kHz-1MHz, 1MHz-
50MHz；Peak-holding circuit is for realizing down sample, the 1 μ s of retention time of peak-holding circuit；The sample rate of A/D capture card
Acquisition data, are directly transferred to processor by 20MS/s by sampling resolution 16.
Compared with prior art, the invention has the following beneficial technical effects:
The invention discloses a kind of synchronising apparatus for partial discharge of switchgear multinode wireless monitor system, will lead
Node unit is encapsulated in a main monitoring node, and each child node unit is encapsulated in a sub- monitoring node, master is utilized
Endpoint processor unit enters synchronization signal emission mode by control mode switch switch, and it is dynamic then to control impulse generating unit
Make, pulse emits wireless synchronization signal to each sub- monitoring node by antenna, then switches to digital signal reception mode；Often
After a sub- monitoring node receives the synchronization pulse that main monitoring node issues, quickly touched via child node signal conditioning unit
AD conversion unit is sent out, local discharge signal is measured, master is then sent to for signal is acquired by child node number communication unit
Endpoint processor unit realizes the synchronization monitoring for the multiple sub- monitoring nodes being mounted on multi-panel switchgear, this is together
The use for walking device, solve that current switch cabinet shelf depreciation wireless monitor technical field always exists can not accurate acquisition office
The problem of portion's discharge signal timing and voltage phase information, by it is a kind of it is economical in a manner of, be directly the positioning of shelf depreciation with
And solid technical foundation has been established in the pattern-recognition of the shelf depreciation based on voltage phase information, device have be easy to extend,
Advantage easy to maintain is particularly suitable for the distributed insulation monitoring of high-tension switch cabinet partial discharge monitoring and other power equipments
The exploitation and application field of equipment.
Further, child node test object and its conditioning circuit by place wave (TEV) sensor and its conditioning circuit and
Ultrasonic sensor and its conditioning circuit composition, wherein conditioning circuit is exaggerated wave wave circuit and peak-holding circuit group by preposition
At the purpose of preposition filtering and amplifying circuit is to guarantee to effectively pick up local discharge signal, and the effect of peak-holding circuit is
It realizes down sample, guarantees that the capture card of 20MS/s sample rate can effectively collect shelf depreciation, reduce product cost.
Detailed description of the invention
Fig. 1 is present system schematic diagram.
Fig. 2 is host node mode selector switch unit composition schematic diagram of the present invention.
Fig. 3 is host node impulse generating unit composition schematic diagram of the present invention.
Fig. 4 is child node AD conversion unit composition schematic diagram of the present invention.
Fig. 5 is work flow diagram of the present invention.
Fig. 6 is field conduct schematic diagram of the present invention.
In figure, 11, host node antenna element；12, host node mode selector switch unit；13, host node pulse generation list
Member；14, host node digital communication unit；15, host node processor unit；16, host node display unit；17, child node antenna
Unit；18, child node mode selector switch unit；19, child node signal conditioning unit；110, child node AD conversion unit；
111, child node number communication unit；112, child node microprocessor unit；113, child node test object and its conditioning circuit.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing:
As shown in Figure 1, a kind of partial discharge of switchgear multinode monitors system synchronization device, including Master node element and
Child node unit, Master node element include host node processor unit 15 and the main section that connect with host node processor unit 15
Point impulse generating unit 13, host node digital communication unit 14 and host node display unit 16, host node impulse generating unit 13
It is connected with host node mode selector switch unit 12, host node mode selector switch list simultaneously with host node digital communication unit 14
Member 12 is connected with host node antenna element 11；Child node unit include child node AD conversion unit 110 and with child node mould
The child node signal conditioning unit 19 and child node microprocessor unit 112 that number converting unit 110 connects, child node microprocessor
Unit 112 is connected with child node number communication unit 111, child node number communication unit 111 and child node signal conditioning unit
19 are connected with child node mode selector switch unit 18 simultaneously, and child node mode selector switch unit 18 is connected with child node antenna
Unit 17, child node AD conversion unit 110 are connected to child node test object and its conditioning circuit 113；
Host node processor unit 15 switches synchronization signal transmitting mould for controlling host node mode selector switch unit 12
Formula and control host node impulse generating unit 13 generate unit pulse signal, and host node digital communication unit 14 is at host node
It is communicated between reason device unit 15 and host node mode selector switch unit 12；
The unit action pulse of host node impulse generating unit 13 is transmitted to by host node mode selector switch unit 12
Host node antenna element 11 passes through host node to each sub- monitoring node transmitting unit pulse signal, host node processor unit 15
Antenna element 11 realizes digital signal reception；
Child node antenna element 17 is used for the unit pulse signal that real-time reception host node issues, and unit pulse signal is passed through
Child node signal conditioning unit 19 triggers child node mode selector switch unit 18, passes through child node mode selector switch unit 18
Child node test object and its conditioning circuit 113 are detected, realizes the measurement of local discharge signal, child node microprocessor unit
112 for the local discharge signal of measurement to be transmitted to by child node number communication unit 111 and child node antenna element 17
Master node element.
Host node antenna element 11 is identical with 17 structure of child node antenna element, all using common single scalable day
Line, model FR150, gain 6dB, standing-wave ratio < 1dB, host node antenna element 11 include two three corner electrodes being oppositely installed, three
Corner electrode is by copper inverted triangle capacitor dipole triads at host node antenna element 11 is logical for the transmitting of unit pulse signal and number
Interrogate it is difunctional, child node antenna element 17 for realizing unit pulse signal receive and digital communication it is difunctional；
Host node digital communication unit 14 and child node number communication unit 111 include that modulation-demodulation circuit and signal are sent out
It penetrates and receives circuit, modulation system uses mode of frequency regulation, carrier frequency 2GHz, and modulation-demodulation circuit uses controllable multi-resonant oscillator
Circuit realizes frequency modulation(PFM)；It includes radio-frequency power amplifier and its driving circuit, radio-frequency power amplification that signal transmitting, which receives circuit,
Device uses HMC580, realizes that signal power amplifies 40dB；
The host node processor unit 15 and child node microprocessor unit 112 use embedded microprocessor ARM, main
Node display unit 16 uses touch liquid crystal display, shows and manipulate host node processor unit 15 for information；
The child node test object and its conditioning circuit 113 include place wave (TEV) sensing, ultrasonic wave (AA) sensing
Device, filter circuit and peak-holding circuit；The preamplifier of place wave (TEV) sensor uses ultra-low noise high speed amplifier
AD4899-1,50 times of preamplifier amplification factor, bandwidth 0-100MHz, common-mode rejection ratio 100dB, ultrasonic wave (AA) sensor
Pre-amplification circuit use ultra-low-distortion precision operational-amplifier LT1126,50 times of amplification factor, bandwidth 0-1MHz, common mode suppression
System compares 100dB；Filter circuit uses active Chebyshev's bandpass filter, then band connection frequency 20kHz-1MHz (AA), 1MHz-
50MHz(TEV)；Peak-holding circuit directlys adopt envelope/peak detector LTC5507, and the effect of peak-holding circuit is to realize drop
Frequency sampling (greatly reduction equipment cost), the 1 μ s of retention time of peak-holding circuit, its main purpose are to guarantee 20MS/s sampling
The capture card of rate can effectively collect shelf depreciation；
As shown in Fig. 2, host node mode selector switch unit 12 includes high frequency relay and driving circuit；High frequency relay
Switch, upper cut-off frequency 3GHz, movement speed 20ms, driving voltage 15V are set using TIS2 hilted broadsword is double；In driving circuit pulse
1 μ s of time is risen, driving current is greater than 1A, can effectively guarantee high frequency relay effective action；High frequency relay passes through respectively
Synchronization pulse cable, data communication cable and driving signal cable and host node impulse generating unit 13, host node number
Communication unit 14 and host node antenna element 11 connect；Synchronization pulse cable uses 1kV high-pressure coaxial cable, wave impedance 50
Europe；Data communication cable and driving signal cable use normal signal coaxial cable, 50 Europe of wave impedance；
Driving circuit includes the junction type field-effect tube D1 that grid connects control signal, and the source electrode of junction type field-effect tube D1 connects
Ground, junction type field-effect tube D1 drain electrode the one end connecting resistance R, enhanced field-effect tube S1 grid and enhanced field-effect tube S2
Grid, the drain electrode of the source electrode of enhanced field-effect tube S1 and enhanced field-effect tube S2 connects the one end inductance L simultaneously, and resistance R is another
Drain electrode, diode d1 cathode, diode d3 cathode and one end resistance R2 of the one enhanced field-effect tube S1 of termination；Enhanced field effect
Should pipe S2 source electrode, diode d2 anode, diode d4 anode, the one end capacitor C and junction type field-effect tube D2 source electrode ground connection, two
Pole pipe d4 cathode, diode d3 anode, the capacitor C other end and junction type field-effect tube D2 grid connect the inductance L other end, diode
D1 anode and diode d2 cathode connect the one end inductance L, the junction type field-effect tube D2 drain electrode connecting resistance R2 other end；
Host node impulse generating unit 13 as shown in Figure 3 includes high-voltage charging circuit, electrion circuit, photoelectric coupling
Circuit, power module and operating frequency phase detector；Power module uses numerical-control direct-current source of stable pressure, and voltage 0-200V is linearly adjustable,
Maximum output current 15A；High-voltage charging circuit includes middle piezoelectricity source module, resistance R1, capacitor C1 and resistance R2, the one end resistance R1
Piezoelectricity source module output cathode in connecting resistance R1, the one end another termination capacitor C1 resistance R1 and the one end resistance R2, capacitor C1 are another
Piezoelectricity source module output negative pole in end and another termination of resistance R2；R1 resistance selection 1k Ω, effect are to realize capacitor fast charging,
Capacitor C1 selects 10nF ceramic condenser, voltage class 5kV, and main function is storage charge, for generating discharge pulse, resistance R2
Effect be the charge for the capacitor C2 that slowly releases when capacitor does not discharge or discharges incomplete；
Capacitor discharge loop includes resistance R3, diode D1, inductance L and field-effect tube S3, the one end resistance R3 and resistance R1
Other end connection, another terminating diode D1 anode of resistance R3, diode D1 cathode connect the one end inductance L, another termination field inductance L
Effect pipe S3 source electrode, field-effect tube S3 drain electrode connect the capacitor C1 other end, and inductance L two terminates output cord, and resistance R3 selects 2 Ω,
Diode D1 selects 1N4007, they all play the role of damped oscillation, and inductance L selects 10nH, forms resonance frequency with capacitor C1
Rate is 16MHz resonance circuit, and field-effect tube S3 selects N-channel field-effect tube, pressure-resistant 500V, maximum through-flow 15A；
Optocoupler driving circuit includes photoelectric coupling chip, resistance R4 and resistance R5, the light-emitting component side of photoelectric coupling chip
Positive and negative anodes connect operating frequency phase detector, and the collector of the photosensitive side of photoelectric coupling chip connects 15V power supply, photoelectric coupling chip
Photosensitive side emitter connecting resistance R5 one end, another termination field-effect tube S3 grid and resistance R4 mono- of resistance R5
End, another termination field-effect tube S3 drain electrode of resistance R4；The effect of photoelectric coupling chip is to realize high-voltage pulse generating circuit and control
The Phototube Coupling of circuit processed, the effect of resistance R4 are the protections of field-effect tube S3 gate pole, and the effect of resistance R5 is limitation driving current；
Operating frequency phase detector is mainly made of positive going zeror crossing comparator and divider, and the power frequency component under PT is drawn passes through
After voltage divider, positive going zeror crossing comparator both ends are added to, guarantee that power frequency positive zero crossing triggers lock-out pulse generating loop, just
Enable port, when only host node processor unit 15 enables positive going zeror crossing comparator, lock-out pulse are had to zero-crossing comparator
Generating loop could work normally；
As shown in figure 4, child node AD conversion unit 18 includes lock-out pulse conditioning circuit, TEV sensor and AA sensing
Device conditioning circuit, controllable A/D converter and processor；Lock-out pulse conditioning circuit includes filter circuit and monostable flipflop,
Filter circuit mainly realizes the bandpass filtering of 1MHz-50MHz, filters out the interference of other frequency signals, guarantees the synchronous arteries and veins of dominant frequency 16MHz
Effective reception of signal is rushed, the purpose of monostable flipflop is to realize lock-out pulse shaping, and steady-state residence time 20ms works as synchronization
When pulse recognition is effective, triggering A/D capture card is acquired sensor detection data, TEV sensor and the conditioning of AA sensor
Circuit is mainly made of filtering and amplifying circuit and peak-holding circuit, and at least 50 times of preamplifier amplification factor, filter circuit is adopted
With active band-pass filter, band connection frequency 20kHz-1MHz (AA), 1MHz-50MHz (TEV), the effect of peak-holding circuit is real
Existing down sample, the 1 μ s of retention time of peak-holding circuit guarantee that the capture card of 20MS/s sample rate can effectively collect office
Portion's electric discharge.Acquisition data, are directly transferred to processor by the sample rate 20MS/s of A/D capture card by sampling resolution 16.
As shown in figure 5, illustrate the operating mode of entire synchronizing device in figure, child node when not receiving lock-out pulse,
Remain lock-out pulse reception pattern, when host node receives synchronous sense command, host node triggers lock-out pulse and electricity occurs
Road emits lock-out pulse to each child node, and after each height section receives lock-out pulse, lock-out pulse improves electricity through extra pulse
The detection data of AD conversion unit acquisition TEV sensor and AA sensor is triggered on road, and will test data and be transferred to subelement
Analog-to-digital conversion initial time is marked in microprocessor, subelement microprocessor, and subelement recycles data communication module will
Detection data timesharing is sent to host node, the shelf depreciation peak that last host node detects each child node sensor of synchronization
Value and phase spectrogram (PRPD) are shown by liquid crystal display, realize the synchronization of the shelf depreciation of multi-panel high-tension switch cabinet
Detection can be determined substantially by the distribution trend of each face partial discharge of switchgear peak value of synchronization and generate shelf depreciation
Switchgear, the phase spectrogram (PRPD) furthermore detected can provide complete reliable data for the identification of partial discharge mode.
As shown in fig. 6, being one embodiment of the present of invention, Partial Discharge Detection child node unit is mounted on multi-panel high pressure
The outer surface of switchgear, shelf depreciation place wave (TEV) sensor and ultrasonic wave (AA) sensor are mounted on every face high-voltage switch gear
The outer surface of cabinet, the local discharge signal that can be generated to high-tension switch cabinet are effectively detected, the main section of Partial Discharge Detection
Point can be placed on mobile detection holder or staff is hand-held, when host node emits lock-out pulse and realizes that each child node is synchronous
After measurement, Partial Discharge Data that child node detects shelf depreciation place wave (TEV) sensor and ultrasonic wave (AA) sensor
It is uploaded to host node, detection while multi-panel partial discharge of switchgear signal can be effectively realized, for staff
By the shelf depreciation amplitude data of observation multi-panel switchgear same time, the switchgear for generating shelf depreciation can be judged, into
And realize the positioning of shelf depreciation, it can be realized the pattern-recognition of shelf depreciation by the phase spectrogram (PRPD) of detection.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, this
Field technical staff makes a little simple modification, equivalent variations or modification using the technology contents of the disclosure above, all falls within this hair
In bright protection scope.
Claims (9)
1. a kind of partial discharge of switchgear multinode monitors system synchronization device, which is characterized in that including Master node element and
Child node unit, Master node element include host node processor unit (15) and connect with host node processor unit (15)
Host node impulse generating unit (13), host node digital communication unit (14) and host node display unit (16), host node pulse
Generating unit (13) and host node digital communication unit (14) are connected with host node mode selector switch unit (12), main section simultaneously
Dot pattern switching switch unit (12) is connected with host node antenna element (11)；Child node unit includes child node analog-to-digital conversion list
First (110) and the child node signal conditioning unit (19) being connect with child node AD conversion unit (110) and the micro- place of child node
It manages device unit (112), child node microprocessor unit (112) is connected with child node number communication unit (111), child node number
Communication unit (111) and child node signal conditioning unit (19) are connected with child node mode selector switch unit (18) simultaneously, son
Node mode switching switch unit (18) is connected with child node antenna element (17), child node AD conversion unit (110) connection
In child node test object and its conditioning circuit (113)；
Host node processor unit (15) is for controlling host node mode selector switch unit (12) switching synchronization signal transmitting mould
Formula and control host node impulse generating unit (13) generating unit movement, host node digital communication unit (14) is at host node
It is communicated between reason device unit (15) and host node mode selector switch unit (12)；
Host node impulse generating unit (13) generates unit pulse signal；
Host node mode selector switch unit (12) is received for signal sends switching, and host node antenna element (11) is used for unit
Pulse signal transmitting and digital communication, host node processor unit (15) realize digital signal by host node antenna element (11)
It receives and handles；
Child node antenna element (17) receives for realizing unit pulse signal and digital communication, child node signal conditioning unit
(19) it is used for conditioning unit pulse signal；Child node mode selector switch unit (18) is used for change detection child node test object
And its conditioning circuit (113), realize the measurement of local discharge signal, what child node microprocessor unit (112) was used to measure
Local discharge signal is transmitted to Master node element by child node number communication unit (111) and child node antenna element (17).
2. a kind of partial discharge of switchgear multinode according to claim 1 monitors system synchronization device, feature exists
In host node antenna element (11) is identical with child node antenna element (17) structure, all uses single retractable aerial, model
FR150, gain 6dB, standing-wave ratio < 1dB.
3. a kind of partial discharge of switchgear multinode according to claim 1 monitors system synchronization device, feature exists
In host node digital communication unit (14) and child node number communication unit (111) include that modulation-demodulation circuit and signal are sent out
It penetrates and receives circuit, modulation system uses mode of frequency regulation, carrier frequency 2GHz, and modulation-demodulation circuit uses controllable multi-resonant oscillator
Circuit realizes frequency modulation(PFM)；It includes radio-frequency power amplifier and its driving circuit, radio-frequency power amplification that signal transmitting, which receives circuit,
Device uses HMC580, realizes that signal power amplifies 40dB.
4. a kind of partial discharge of switchgear multinode according to claim 1 monitors system synchronization device, feature exists
In the host node processor unit (15) and child node microprocessor unit (112) use embedded microprocessor ARM.
5. a kind of partial discharge of switchgear multinode according to claim 1 monitors system synchronization device, feature exists
In, the child node test object and its conditioning circuit (113) include place wave sensing, ultrasonic sensor, filter circuit and
Peak-holding circuit；The preamplifier of place wave sensor uses ultra-low noise high speed amplifier AD4899-1, preamplifier
50 times of amplification factor, bandwidth 0-100MHz, common-mode rejection ratio 100dB；The pre-amplification circuit of ultrasonic sensor is using ultralow
Be distorted precision operational-amplifier LT1126,50 times of amplification factor, bandwidth 0-1MHz, common-mode rejection ratio 100dB；Filter circuit uses
Active Chebyshev's bandpass filter, then band connection frequency 20kHz-1MHz, 1MHz-50MHz；Peak-holding circuit directlys adopt packet
Network/peak detector LTC5507, peak-holding circuit is for realizing down sample, the 1 μ s of retention time of peak-holding circuit.
6. a kind of partial discharge of switchgear multinode according to claim 1 monitors system synchronization device, feature exists
In host node mode selector switch unit (12) includes high frequency relay and driving circuit；High frequency relay uses TIS2 hilted broadsword
It is double to set switch, upper cut-off frequency 3GHz, movement speed 20ms, driving voltage 15V；1 μ s of driving circuit pulse rise time drives
Streaming current is greater than 1A；High frequency relay pass through respectively synchronization pulse cable, data communication cable and driving signal cable with
Host node impulse generating unit (13), host node digital communication unit (14) and host node antenna element (11) connection.
7. a kind of partial discharge of switchgear multinode according to claim 6 monitors system synchronization device, feature exists
In driving circuit includes the junction type field-effect tube D1 that grid connects control signal, and the source electrode ground connection of junction type field-effect tube D1 connects
The drain electrode one end connecting resistance R, the grid of enhanced field-effect tube S1 and the grid of enhanced field-effect tube S2 of face type field-effect tube D1
The drain electrode of pole, the source electrode of enhanced field-effect tube S1 and enhanced field-effect tube S2 connects the one end inductance L, the resistance R other end simultaneously
Connect drain electrode, diode d1 cathode, diode d3 cathode and the one end resistance R2 of enhanced field-effect tube S1；Enhanced field-effect tube
Source electrode, diode d2 anode, diode d4 anode, the one end capacitor C and the junction type field-effect tube D2 source electrode ground connection of S2, diode
D4 cathode, diode d3 anode, the capacitor C other end and junction type field-effect tube D2 grid connect the inductance L other end, and diode d1 is just
Pole and diode d2 cathode connect the one end inductance L, the junction type field-effect tube D2 drain electrode connecting resistance R2 other end.
8. a kind of partial discharge of switchgear multinode according to claim 1 monitors system synchronization device, feature exists
In host node impulse generating unit (13) includes high-voltage charging circuit, electrion circuit, photoelectric coupling circuit, power module
With operating frequency phase detector；
Power module uses numerical-control direct-current source of stable pressure；High-voltage charging circuit includes middle piezoelectricity source module, resistance R1, capacitor C1 and electricity
Hinder R2, piezoelectricity source module output cathode, the one end another termination capacitor C1 resistance R1 and resistance R2 in mono- terminating resistor R1 of resistance R1
Piezoelectricity source module output negative pole in one end, the capacitor C1 other end and another termination of resistance R2；
Capacitor discharge loop includes resistance R3, diode D1, inductance L and field-effect tube S3, and the one end resistance R3 and resistance R1 are another
End connection, another terminating diode D1 anode of resistance R3, diode D1 cathode connect the one end inductance L, another termination field-effect of inductance L
Pipe S3 source electrode, field-effect tube S3 drain electrode connect the capacitor C1 other end, and inductance L two terminates output cord；
Optocoupler driving circuit includes photoelectric coupling chip, resistance R4 and resistance R5, and the light-emitting component side of photoelectric coupling chip is positive and negative
Pole connects operating frequency phase detector, and the collector of the photosensitive side of photoelectric coupling chip connects 15V power supply, the light of photoelectric coupling chip
One end of the emitter connecting resistance R5 of quick component side, another termination field-effect tube S3 grid of resistance R5 and the one end resistance R4, electricity
Hinder another termination field-effect tube S3 drain electrode of R4；
Operating frequency phase detector includes positive going zeror crossing comparator and divider, and positive going zeror crossing comparator has enable port.
9. a kind of partial discharge of switchgear multinode according to claim 1 monitors system synchronization device, feature exists
In, child node AD conversion unit (18) include lock-out pulse conditioning circuit, TEV sensor and AA Conditioning Circuits of Sensor, can
Control A/D converter and processor；Lock-out pulse conditioning circuit includes filter circuit and monostable flipflop, and filter circuit is for real
The bandpass filtering of existing 1MHz-50MHz, filters out the interference of other frequency signals, monostable flipflop for realizing lock-out pulse shaping,
Steady-state residence time 20ms, when the identification of unit pulse signal is effective, triggering A/D capture card adopts sensor detection data
Collection；TEV sensor and AA Conditioning Circuits of Sensor include filtering and amplifying circuit and peak-holding circuit, preamplifier amplification factor
At least 50 times, filtering and amplifying circuit uses active band-pass filter, band connection frequency 20kHz-1MHz, 1MHz-50MHz；Peak value is protected
Holder is for realizing down sample, the 1 μ s of retention time of peak-holding circuit；The sample rate 20MS/s of A/D capture card, sampling resolution
16, acquisition data are directly transferred to processor.
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| CN113253066A (en) * | 2021-04-27 | 2021-08-13 | 国网山东省电力公司烟台供电公司 | Partial discharge ultrahigh frequency signal PRPD/PRPS atlas phase synchronization method |
| CN115022959A (en) * | 2022-08-04 | 2022-09-06 | 绵阳优森科技有限公司 | Unified control and timing system and method in wireless communication and body measurement wearable device |
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| CN109917245A (en) * | 2019-03-27 | 2019-06-21 | 国网上海市电力公司 | Consider the ultrasound detection local discharge signal mode identification method of phase difference |
| CN110554284A (en) * | 2019-08-23 | 2019-12-10 | 国网江苏省电力有限公司电力科学研究院 | GIS (geographic information System) -based correlation analysis method and system for partial discharge detection mode |
| CN110763959A (en) * | 2019-09-24 | 2020-02-07 | 武汉汉源既济电力有限公司 | High-voltage switch cabinet partial discharge detection circuit and detection method thereof |
| CN110763959B (en) * | 2019-09-24 | 2022-02-22 | 武汉汉源既济电力有限公司 | High-voltage switch cabinet partial discharge detection method |
| CN112462214A (en) * | 2020-11-26 | 2021-03-09 | 云南电网有限责任公司电力科学研究院 | Intelligent sensing terminal for partial discharge |
| CN112462214B (en) * | 2020-11-26 | 2023-01-20 | 云南电网有限责任公司电力科学研究院 | Intelligent sensing terminal for partial discharge |
| CN113253066A (en) * | 2021-04-27 | 2021-08-13 | 国网山东省电力公司烟台供电公司 | Partial discharge ultrahigh frequency signal PRPD/PRPS atlas phase synchronization method |
| CN113253066B (en) * | 2021-04-27 | 2024-01-26 | 国网山东省电力公司烟台供电公司 | Partial discharge ultrahigh frequency signal PRPD/PRPS spectrum phase synchronization method |
| WO2023210048A1 (en) * | 2022-04-28 | 2023-11-02 | 株式会社日立産機システム | Partial discharge detector |
| CN115022959A (en) * | 2022-08-04 | 2022-09-06 | 绵阳优森科技有限公司 | Unified control and timing system and method in wireless communication and body measurement wearable device |
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