CN105043457B - Cable status monitors warning data integrated processing terminal on-line - Google Patents
Cable status monitors warning data integrated processing terminal on-line Download PDFInfo
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- CN105043457B CN105043457B CN201510589199.0A CN201510589199A CN105043457B CN 105043457 B CN105043457 B CN 105043457B CN 201510589199 A CN201510589199 A CN 201510589199A CN 105043457 B CN105043457 B CN 105043457B
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Abstract
Cable status monitors warning data integrated processing terminal on-line, it is characterised in that：A shell is provided with, control circuit is fixed with shell, control circuit is connected with monitored cable, and control circuit comprises at least：Cable connector wireless temperature measurement unit, for being monitored in real time to the connector temperature for being monitored cable；Cable local discharge detection unit, the shelf depreciation situation of cable is monitored；Cable insulation monitors unit on-line, for carrying out on-line real time monitoring to the state of insulation of cable；And CPU, for receiving, handling the data of said units monitoring.In this cable status monitors warning data integrated processing terminal on-line, cable connector wireless temperature measurement unit, cable local discharge detection unit and cable insulation on-line monitoring unit are provided with simultaneously, the multiple parameters of cable can be acquired and be handled simultaneously, the convenient running status to cable carries out comprehensive descision.
Description
Technical field
Cable status monitors warning data integrated processing terminal on-line, belongs to Cable Fault Detection Technology field.
Background technology
Cable is transmission apparatus essential in power industry, therefore the actual motion state for grasping cable is to ensure electricity
Cable can reliably working necessary condition.In existing cable status detecting system, generally existing has following defect：
（1）Monitoring project is single.Only a certain item performance data of cable is acquired, therefore master system can not be complete
Multiple state parameters of cable are grasped in face, therefore carry out accurate judgement to the state of cable without enough criterions, so if
Need to judge multiple states of cable, then need to be equipped with multiple systems, cost is higher.
（2）The online judgement to cable insulation state can not be realized.The quality of cable insulation is that influence cable is safe and reliable
The key factor of operation, in the actual moving process of cable, most of cable fault is due to that cable insulation generation deterioration is drawn
Rise.Cable generally includes outside insulating barrier and screen layer in structure, when insulating barrier occurs damaged, the insulation of cable
Performance can decline.Cable equivalent can have grounding resistance and ground capacity with the earth terminal time, when cable performance declines, ground connection electricity
The numerical value of resistance and ground capacity can change.
Existing cable insulation method of testing, it is after screen layer and earth terminal open circuit, big electricity is injected into screen layer
To press and the insulating properties of cable are tested, due to cable in the process of running, it is desirable to screen layer must be grounded, and to screen layer
The magnitude of voltage of injecting voltage can not carry out on-line testing to the insulating properties of cable in the prior art no more than 50V,
Have to carry out after cable is had a power failure, and once cable has a power failure, the electricity consumption of substantial amounts of user can be impacted, or even meeting
Cause immeasurable economic loss.
The content of the invention
The technical problem to be solved in the present invention is：Overcome the deficiencies in the prior art, there is provided it is a kind of can be to the multiple of cable
Parameter is tested simultaneously, particularly can carry out on-line testing, the convenient running status to cable to the state of insulation of cable
Carry out the cable status on-line monitoring warning data integrated processing terminal of comprehensive descision.
The technical solution adopted for the present invention to solve the technical problems is：Cable status on-line monitoring warning data synthesis
Processing terminal, it is characterised in that：A shell is provided with, control circuit, control circuit and monitored electricity are fixed with shell
Cable is connected, and control circuit comprises at least：
Cable connector temperature measuring unit, for being monitored in real time to the connector temperature for being monitored cable；
Cable local discharge detection unit, the shelf depreciation situation of cable is monitored；
Cable insulation monitors unit on-line, for carrying out on-line real time monitoring to the state of insulation of cable；
And CPU, for receive, handle cable connector temperature measuring unit, cable local discharge detection unit with
And the data of cable insulation on-line monitoring unit monitoring.Cable local discharge detection unit includes shelf depreciation range-adjusting mould
Block, local discharge signal filtration module, local discharge signal comparison module and local discharge signal Shaping Module, shelf depreciation
The signal access shelf depreciation range-adjusting module of sensor output, shelf depreciation range-adjusting module, local discharge signal filter
Ripple module, local discharge signal comparison module and local discharge signal Shaping Module are sequentially connected, local discharge signal shaping
Module is connected with CPU.
Preferably, described cable insulation on-line monitoring unit includes data acquisition end and data processing end, described number
Include according to collection terminal：Zero sequence signal acquisition module and insulating signal acquisition module, described data processing end gather including amplitude
Processing module and phase acquisition processing module；
Zero sequence signal acquisition module and insulating signal acquisition module are connected with amplitude acquisition processing module, amplitude acquisition process
Module is connected with CPU；
Zero sequence signal acquisition module and insulating signal acquisition module are connected with phase acquisition processing module simultaneously, phase acquisition
Processing module is connected with CPU.
Preferably, described zero sequence signal acquisition module, including：
Zero-sequence current acquisition module, its input is connected with the secondary side of zero sequence current mutual inductor in cable, for gathering
Obtain zero-sequence current amplitude data and zero-sequence current phase data and deliver to respectively at amplitude acquisition processing module and phase acquisition
Manage module；
Residual voltage acquisition module, its input is connected with the secondary side of zero sequential potential transformer in cable, for gathering
Obtain residual voltage amplitude data and deliver to amplitude acquisition processing module；
Described insulating signal acquisition module, including：
Insulation current acquisition module, its input are connected with the secondary side of insulating signal transformer, for collecting absolutely
Edge current amplitude data and insulation current phase data simultaneously deliver to amplitude acquisition processing module and phase acquisition processing module respectively；
Insulation voltage acquisition module, its input are connected with the secondary side of insulating signal transformer, for collecting absolutely
Edge voltage magnitude data and insulation voltage phase data simultaneously deliver to amplitude acquisition processing module and phase acquisition processing module respectively.
Preferably, described zero-sequence current acquisition module includes zero-sequence current bandpass filter, the zero sequence electricity being sequentially connected
Stream follows circuit, zero sequence current signal comparison circuit and zero-sequence current waveform shaping circuit；
The described zero sequence current mutual inductor of zero-sequence current bandpass filter input connection, zero-sequence current waveform shaping circuit
Output end is drawn zero-sequence current phase data and is connected with phase acquisition processing module, and zero-sequence current follows circuit output end while drawn
Go out zero-sequence current amplitude data with amplitude acquisition processing module to be connected.
Preferably, described insulation voltage acquisition module includes insulation voltage bandwidth-limited circuit, the insulation being sequentially connected
Voltage follower circuit, insulation voltage comparison circuit, insulation voltage shaping circuit, insulation voltage range of decrease circuit and insulation voltage are high
Fast comparison circuit；
Insulation voltage bandwidth-limited circuit is connected with insulating signal transformer, the output end of insulation voltage high speed comparison circuit
Draw insulation voltage phase data with phase acquisition processing module to be connected, the output end of self-insulating voltage follower circuit is drawn simultaneously
Insulation voltage amplitude data is connected with amplitude acquisition processing module.
Preferably, described insulation current acquisition module includes insulation current comparison circuit, the insulation current being sequentially connected
Bandwidth-limited circuit, insulation current follow the secondary comparison circuit of circuit, insulation current, insulation current shaping circuit and insulated electro
Flow high speed comparison circuit；
Insulation current comparison circuit is connected with insulating signal transformer, and the output end of insulation current high speed comparison circuit is drawn
Insulation current phase data is connected with phase acquisition processing module, and the output end of self-insulating current follower circuit draws insulation simultaneously
Current amplitude data are connected with amplitude acquisition processing module.
Preferably, described residual voltage acquisition module includes residual voltage bandwidth-limited circuit and residual voltage follows electricity
Road, residual voltage bandwidth-limited circuit are connected with zero sequential potential transformer, and residual voltage follows circuit output end to draw zero sequence electricity
Pressure amplitude Value Data is connected with amplitude acquisition processing module.
Preferably, described amplitude acquisition processing module includes：
Amplitude gathers handover module, for receiving and switching zero-sequence current amplitude data, the residual voltage width of output cable
Value Data, insulation current amplitude data, insulation voltage amplitude data；
RMS conversion module, its input are connected with amplitude collection handover module output end, adopted for changing amplitude
Collect the data of handover module output；
Analog-to-digital conversion module, its input connection RMS conversion module output end, its output end connection central processing
Unit.
Preferably, described phase acquisition processing module includes：
Two groups of NOR gate circuits：Two groups of inputs receive insulation current phase data and insulation voltage number of phases respectively
According to, zero-sequence current phase data and standard block data all the way；
Phase acquisition handover module, its input are respectively connected to the output end of two groups of NOR gate circuits, the connection of its output end
CPU.
Preferably, described insulating signal transformer includes one using core body made of foam and golden material, and twines
Two groups of coils being wound on the core body, one of which coil are connected between cable screening wire and earth terminal, another group of coil
Connect insulation current acquisition module and insulation voltage acquisition module and the voltage for injecting 22Hz voltage signals to screen layer
Injection device.
Compared with prior art, beneficial effect possessed by the present invention is：
1st, in this cable status monitors warning data integrated processing terminal on-line, while it is provided with cable connector and wirelessly surveys
The multiple parameters of cable can be entered by warm unit, cable local discharge detection unit and cable insulation on-line monitoring unit simultaneously
Row collection and processing, the convenient running status to cable carry out comprehensive descision.
2nd, by setting cable insulation to monitor unit on-line, realize and the state of insulation of cable is monitored online, have
Help find cable insulation failure in time, ensure that the safe and reliable operation of cable.
3rd, the zero-sequence current acquisition module in unit, residual voltage acquisition module are monitored on-line by cable insulation, is insulated
Current acquisition module and insulation voltage acquisition module, the amplitude to the parameters in cable and phase data it can carry out respectively
Collection and analysis, the criterion of cable insulation is more sufficient, and result of determination is more accurate.
4th, by setting amplitude to gather handover module in replicate acquisition module, be able to will be received according to setting interval
Data carry out circulation output, while set RMS conversion module, realize while have to 22Hz and 50Hz signal
Valid value is changed.
5th, by setting the insulating signal transformer of foamed alloy material, when actually measuring, it is possible to achieve 22Hz voltages
The injection and reception of signal, are judged online by realizing cable insulation to the data received.By by the frequency of injecting voltage
Rate is set to 22Hz, it is possible to prevente effectively from being mixed with the signal of itself in cable, ensure that signal is received and extracted effective
Property.
Brief description of the drawings
Fig. 1 is that cable status monitors warning data integrated processing terminal functional-block diagram on-line.
Fig. 2 is that cable insulation monitors unit functional-block diagram on-line.
Fig. 3 is that cable insulation monitors unit amplitude acquisition process unit functional-block diagram on-line.
Fig. 4 is that cable insulation monitors unit phase acquisition processing unit functional-block diagram on-line.
Fig. 5 is that cable insulation monitors unit zero-sequence current acquisition module functional-block diagram on-line.
Fig. 6 is that cable insulation monitors unit residual voltage acquisition module functional-block diagram on-line.
Fig. 7 is that cable insulation monitors unit insulation current acquisition module functional-block diagram on-line.
Fig. 8 is that cable insulation monitors unit insulation voltage acquisition module functional-block diagram on-line.
Fig. 9 is that cable status monitors warning data integrated processing terminal Partial Discharge Detection unit functional-block diagram on-line.
Figure 10 ~ 12 are that cable status monitors warning data integrated processing terminal power supply unit circuit theory diagrams on-line.
Figure 13 is that cable status monitors warning data integrated processing terminal communication unit circuit theory diagrams on-line.
Figure 14 is that cable status monitors warning data integrated processing terminal storage unit circuit schematic diagram on-line.
Figure 15 is that cable status monitors warning data integrated processing terminal AD conversion unit circuit theory diagrams on-line.
Figure 16 ~ 19 are that cable status monitors warning data integrated processing terminal power supply unit circuit theory diagrams on-line.
Figure 20 is that cable status monitors warning data integrated processing terminal Partial Discharge Detection element circuit schematic diagram on-line.
Figure 21 is that cable status monitors warning data integrated processing terminal insulation current acquisition module circuit theory diagrams on-line.
Figure 22 is that cable status monitors warning data integrated processing terminal insulation voltage acquisition module circuit theory diagrams on-line.
Figure 23 is that cable status monitors warning data integrated processing terminal zero-sequence current acquisition module circuit theory diagrams on-line.
Figure 24 is that cable status monitors warning data integrated processing terminal residual voltage acquisition module circuit theory diagrams on-line.
Figure 25 is that cable status monitors warning data integrated processing terminal amplitude acquisition processing module circuit theory diagrams on-line.
Figure 26 is that cable status monitors warning data integrated processing terminal phase acquisition processing module circuit theory diagrams on-line.
Embodiment
Fig. 1 ~ 26 are highly preferred embodiment of the present invention, and 1 ~ 26 the present invention will be further described below in conjunction with the accompanying drawings.
Cable status monitors warning data integrated processing terminal on-line, is provided with a shell, this electricity is provided with shell
The control circuit of cable state on_line monitoring warning data integrated processing terminal, as shown in figure 1, cable status monitors early warning number on-line
Include according to the control circuit of integrated processing terminal：CPU and the cable connector being connected with CPU are wireless
Temperature measuring unit, cable insulation on-line monitoring unit and cable local discharge detection unit, pass through cable connector wireless temperature measurement list
The real-time monitoring to temperature of cable junction is can be achieved in member, and real-time temperature data is delivered in CPU and located
Reason, cable connector wireless temperature measurement unit can be achieved by the prior art, and its course of work and operation principle will not be repeated here.Electricity
The cable insulated on-line monitoring unit data that insulated by mutual inductance original paper to cable side are acquired, and the data collected are delivered to
Handled in Central Processing Unit；Cable local discharge detection unit can detect to the shelf depreciation situation of cable simultaneously,
The data measured are delivered in CPU simultaneously.
In the control circuit of cable status on-line monitoring warning data integrated processing terminal, it is additionally provided with and central processing
The two-way connected communication module of unit, memory module and to whole cable status monitor on-line warning data integrated processing terminal
The power supply unit being powered.Being connected and communicating for CPU and host computer is realized by communication module；Pass through storage
Module realizes storage and the calling for the data that CPU receives.
As shown in Fig. 2 cable insulation on-line condition monitoring unit includes data acquisition end and data processing end, data acquisition
End includes zero sequence signal acquisition module and insulating signal acquisition module, and data processing end includes amplitude acquisition processing module and phase
Position acquisition processing module.Zero sequence signal acquisition module and insulating signal acquisition module are connected group with amplitude acquisition processing module respectively
Into the amplitude acquisition process unit of cable insulation on-line condition monitoring unit；Zero sequence signal acquisition module and insulating signal collection mould
Block is connected to form the phase acquisition processing unit of cable insulation on-line condition monitoring unit with phase acquisition processing module respectively.
Zero sequence signal acquisition module includes zero-sequence current acquisition module and residual voltage acquisition module, zero-sequence current collection again
Module is by setting zero sequence current mutual inductor in the cable to obtain the amplitude data and phase data of cable zero-sequence current, zero sequence
Voltage acquisition module is by setting zero sequential potential transformer in the cable to obtain the amplitude data and phase of cable residual voltage
Data.Insulating signal acquisition module includes insulation current acquisition module and insulation voltage acquisition module again.Insulation acquisition module leads to
Crossing insulating signal transformer can be acquired respectively to the insulation current signal and insulation voltage signal of cable, and pass through insulation
Signal acquisition module respectively obtains the amplitude data and phase data of cable insulation electric current, the amplitude data and phase of insulation voltage
Data.
Insulating signal transformer includes one using core body made of foam and golden material, and is wrapped on the core body
Two groups of coils, one of which coil are connected between cable screening wire and earth terminal, transmission of another group of coil as signal
End and receiving terminal access the control circuit of this cable status on-line monitoring warning data integrated processing terminal（Hereinafter referred to as control electricity
Road）In.When actually measuring, control circuit is by controlling conventional voltage injection device injected frequency into the screen layer of cable
For 22Hz, voltage is less than 50V voltage signal, due to there are ground capacity and grounding resistance between cable and earth terminal, when
Loop is formed between ground capacity and grounding resistance after signal injection and there are corresponding signal feedback, work as state of insulation
When changing, corresponding returned data can change.By the 22Hz returned in the cable screening wire that receives voltage
Signal and current signal are judged by the analysis to insulating signal real to the state of insulation of cable as the insulating signal of cable
Online judgement is showed.By the way that the frequency of injecting voltage is set into 22Hz, it is possible to prevente effectively from being carried out with the signal of itself in cable
Mix, ensure that the validity that signal is received and extracted.
As shown in figure 3, the amplitude acquisition process in the amplitude acquisition process unit of cable insulation on-line condition monitoring unit
Module includes amplitude collection handover module, RMS conversion module and analog-to-digital conversion module.In zero sequence signal acquisition module
The amplitude data of zero sequence current signal and the amplitude data of residual voltage signal, and the insulated electro in insulating signal acquisition module
The amplitude data of signal and the amplitude data of insulation current signal is pressed to deliver to simultaneously in amplitude collection handover module, amplitude collection is cut
The amplitude data that block timesharing receives unlike signal is changed the mold, the amplitude data received is sent into the input of RMS conversion module
End, RMS conversion module carry out RMS-DC converter to the data of feeding and carry out analog-to-digital conversion by analog-to-digital conversion module afterwards
It is sent into afterwards in CPU.
As shown in figure 4, the amplitude acquisition process in the phase acquisition processing unit of cable insulation on-line condition monitoring unit
Module includes two-way NOR gate circuit and phase acquisition handover module.Insulation voltage signal in insulating signal acquisition module
Phase data and the phase data of insulation current signal are sent into the input of NOR gate circuit all the way simultaneously；Zero sequence signal gathers mould
The phase data of zero sequence current signal and the input of standard block phase signal feeding another way NOR gate circuit all the way in block
End, the output end of two-way NOR gate circuit are sent into phase acquisition handover module simultaneously, the output end of phase acquisition handover module
Access the signal input part of CPU.
As shown in figure 5, zero-sequence current acquisition module includes zero-sequence current bandpass filter, zero-sequence current follows circuit, zero
Sequence current signal comparison circuit and zero-sequence current waveform shaping circuit.The zero-sequence current letter collected from zero sequence current mutual inductor
Number first pass around zero-sequence current bandwidth-limited circuit and carry out bandpass filtering, obtain 50Hz zero sequence current signal, zero-sequence current letter
Number being sent into zero-sequence current follows the input of circuit, follows circuit to improve carrying load ability by zero-sequence current, from zero sequence electricity
Stream follows the output end of circuit to obtain the amplitude data of zero-sequence current.Zero-sequence current follows the zero sequence electricity that the output end of circuit exports
Stream signal successively by zero sequence current signal comparison circuit be compared export and the shaping of zero-sequence current waveform shaping circuit it
The phase data of zero-sequence current is obtained afterwards.
As shown in fig. 6, residual voltage acquisition module includes residual voltage bandwidth-limited circuit and residual voltage follows circuit.
The residual voltage signal collected from zero sequential potential transformer follows by residual voltage bandwidth-limited circuit, residual voltage successively
The amplitude data of residual voltage is obtained after circuit.
As shown in fig. 7, insulation voltage acquisition module includes insulation voltage bandwidth-limited circuit, insulation voltage follows circuit,
Insulation voltage comparison circuit, insulation voltage shaping circuit, insulation voltage range of decrease circuit and insulation voltage high speed comparison circuit.From
It is 22Hz's that the insulation voltage signal that insulating signal transformer obtains, which first passes around insulation voltage bandwidth-limited circuit and obtains frequency,
Insulation voltage signal, the insulation voltage signal for the 22Hz for filtering to obtain are sent into insulation voltage and follow circuit to improve carrying load ability,
The output end of self-insulating voltage follower circuit obtains the amplitude data of insulation voltage.The output end of insulation voltage range-adjusting circuit
The signal of output delivers to insulation voltage comparison circuit and is compared output simultaneously, and relatively the signal of output is sent into insulation to signal afterwards
Voltage shaping circuit carries out waveform shaping, carries out the range of decrease through insulation voltage range of decrease circuit after signal shaping completion, is then sent to
The square-wave signal of standard is formed after insulation voltage high speed comparison circuit, the square-wave signal is carried out as the phase data of insulation voltage
Output.
As shown in figure 8, insulation current acquisition module include insulation current comparison circuit, insulation current bandwidth-limited circuit,
Insulation current follows the secondary comparison circuit of circuit, insulation current, insulation current shaping circuit and insulation current high ratio more electric
Road.The insulation current signal that self-insulating signal transformer obtains first passes around insulation current comparison circuit and is compared output, so
The insulation current signal that frequency is 22Hz is obtained by insulation current bandwidth-limited circuit, it is defeated through insulation current bandwidth-limited circuit
The 22Hz gone out insulation current signal follows the carrying load ability of circuit raising signal by insulation current, then by insulation current
Secondary comparison circuit carries out secondary comparison to insulation current signal.After the secondary comparison circuit of insulation current carries out secondary comparison
Insulation current signal again passes by insulation current shaping circuit and insulation current high speed comparison circuit obtains the square wave letter of standard
Number, the square-wave signal is exported as the phase data of insulation current.
As shown in figure 9, cable local discharge detection unit includes shelf depreciation range-adjusting module, local discharge signal is filtered
Ripple module, local discharge signal comparison module and local discharge signal Shaping Module.Shelf depreciation range-adjusting module receives
The signal of the local discharge sensor output of installation in the cable, and the signal is subjected to range-adjusting, after range-adjusting
Local discharge signal be filtered successively by local discharge signal filtration module, local discharge signal comparison module and office
After portion's discharge signal Shaping Module carries out waveform comparison, shaping respectively, the local discharge signal after shaping is fed directly to center
The signal input part of processing unit.
As shown in Figure 10 ~ 12, this cable status on-line monitoring warning data integrated processing terminal power supply unit include by
The power supply of model WRA4805S-3WR2 integrated chip U2 and model AS1117-3.3 integrated chip U12 compositions turns
Change circuit.As shown in Figure 10, binding post J6 introduces 48V dc sources, and 48V dc sources first pass around diode D1 ~ D2 groups
Into rectifier bridge, the nonpolarity input of dc source can be realized by rectifier bridge, in the output head anode and earth terminal of rectifier bridge
Between be parallel with TVS diode D5 and electric capacity C1, the output head anode of rectifier bridge shunt inductance L1 simultaneously one end, inductance L1's
Integrated chip U2 in parallel 2 pin and electric capacity C3 positive pole, electric capacity C3 negative pole are grounded the other end simultaneously.Obtained by integrated chip U2
To+5V dc sources and -5V dc sources.
+ 5V the dc sources being converted to as shown in figure 11 by integrated chip are connected in parallel to integrated chip U12 3 pin, through collection
3.3V direct current signals are converted into chip U12, in integrated chip U12 3 pin（That is input）With 1 pin（That is earth terminal）Between
Electric capacity C58 ~ C59 is parallel with, in integrated chip U12 2 pin and 4 pin（And output end）Electric capacity C60 is parallel between 1 pin simultaneously
Electric capacity C18 ~ C22 shown in ~ C61 and Figure 12.
As shown in figure 13, the communication unit of this cable status on-line monitoring warning data integrated processing terminal is by model
MAX1480BEPI integrated chip U30 compositions.Integrated chip U30 1 pin, 2 pin, 8 pin, 10 pin and 14 pin connection direct current
Source+5V.One signal output part of CPU once connect NOT gate chip U15D, U15F and resistance R72 connections collection
Into chip U30 9 pin, another signal output part series connection NOT gate chip U15E of CPU and resistance R71 connections
Integrated chip U30 11 pin.For integrated chip U30 13 pin through being grounded after NOT gate chip U15C, resistance R66 ~ R67,13 pin are same
When parallel resistance R69 connection dc sources+5V.Integrated chip U30 25 pin, 23 pin difference series resistance R80, resistance R81 it
Connect binding post J9 1 pin and 4 pin respectively afterwards, model is parallel with simultaneously between integrated chip U30 25 pin, 23 pin
2RM075L-5 protection pipe D11 and model P6KE10CA protection pipe D12.Between binding post J9 1 pin and 4 pin simultaneously
Model 3RM075L-6 protection pipe is parallel with, binding post J9 2 pin are in parallel with 4 pin, and 1 pin is in parallel with 3 pin, binding post
J9 is connected as external wiring terminal with host computer, realizes communication.
As shown in figure 14, the memory cell of this cable status on-line monitoring warning data integrated processing terminal uses model
FM24W256-G integrated chip U19.Integrated chip U19 1 ~ 4 pin ground connection, the pin of 5 pin ~ 7 connect CPU respectively
Input/output port, the pin of integrated chip U19 5 pin ~ 7 pass through resistance R25 ~ R27 connection dc sources 3.3V respectively simultaneously.
As shown in figure 15, above-mentioned analog-to-digital conversion module is realized using model ADS1110 integrated chip U13, simulation
Signal is connected to integrated chip U13 1 pin, integrated chip U13 2 pin, 6 pin ground connection, 3 pin, 4 pin and central processing through resistance R5
The signal input part of unit is connected, integrated chip U13 3 pin, 4 pin while difference parallel resistance R13 ~ R14 connection 3.3V direct currents
Power supply.
As shown in figure 16, CPU uses signal to be realized for STM32F407VET6 single-chip microcomputer U14.Integrated core
Piece U14 95 pin and 96 pin, 36 pin connect 6 pin and 5 pin, 7 pin of integrated chip U19 in above-mentioned memory cell respectively.It is integrated
Eight toggle switch shown in chip U14 97 pin, 98 pin, 1 pin, 2 pin, 3 pin, 4 pin, 5 pin and 38 pin connection figures 17, work as list
During the piece machine U14 multiple analog-to-digital conversion modules of connection, it can realize that single-chip microcomputer U19 receives corresponding modulus by the setting to toggle switch
The data of modular converter.2 pin in binding post J8,3 pin and 5 pin shown in Figure 18 respectively 72 pin with single-chip microcomputer U14,
76 pin and 14 pin are connected, binding post J8 1 pin connection 3.3V dc sources, 4 pin ground connection, and binding post J8 is used to carry out list
Piece machine U14 emulation testing.
Single-chip microcomputer U14 8 pin, 9 pin difference series capacitance C87 ~ C88 ground connection, crystal oscillator Y1 in parallel simultaneously between 8 pin, 9 pin；
Single-chip microcomputer U14 12 pin, 13 pin difference series capacitance C90 ~ C91 ground connection, crystal oscillator Y2 in parallel simultaneously between 12 pin, 13 pin.Monolithic
Connect respectively resistance R28 in Figure 19, switch S1 and resistance R29, switch S2 ground connection or 3.3V of machine U14 37 pin, 94 pin is straight
Flow power supply.Single-chip microcomputer U14 92 pin connect NOT gate chip U15D in above-mentioned communication unit, and single-chip microcomputer U14 93 pin are connected in parallel to
State in communication unit between resistance R66 ~ R67, single-chip microcomputer U14 51 pin connect the NOT gate chip U15E in above-mentioned communication unit.
Single-chip microcomputer U14 86 pin, 87 pin connect binding post J7 2 pin and 3 pin, binding post J7 1 pin connection 3.3V direct currents respectively
Power supply, 4 pin ground connection, binding post J7 are used to connect above-mentioned cable connector wireless temperature measurement unit, wirelessly surveyed by cable connector
Warm unit can realize the real-time monitoring to temperature of cable junction.Single-chip microcomputer U14 47 pin, 48 pin connect above-mentioned analog-to-digital conversion respectively
Integrated chip U13 3 pin and 4 pin in module.3.3V dc source series resistance R37 connect single-chip microcomputer with light emitting diode D6
U14 62 pin, 3.3V dc source series resistance R38 connect single-chip microcomputer U14 61 pin with light emitting diode D7.
As shown in figure 20, Partial Discharge Detection unit mainly includes model AD8310 integrated chip U24, model
OPA690 integrated amplification chip U11, U9, U7 and model LM360 integrated chip U28.Binding post J5 is used to connect
The signal output part of local discharge sensor, binding post J5 1 pin are sequentially connected in series electric capacity C54 ~ C55, resistance R77 and electric capacity
C33 connection integrated chips U24 8 pin, binding post J5 2 pin ground connection.Model is parallel between 1 pin and 2 pin of binding post
For SMJ90A diode D15, inductance L5, inductance L4 and resistance R98 one end is connected in parallel between electric capacity C54 ~ C55 respectively,
Between electric capacity C55 and resistance R77 and between electric capacity C33 and resistance R77, inductance L5, inductance L4 and resistance R98 a termination
Ground.
Integrated amplification chip U11 3 pin are connected after integrated chip U24 4 pin series resistance R12, integrate amplification chip
Resistance R93 is parallel between U11 1 pin and 4 pin.Simultaneously after the integrated chip U24 pin series diode D14 of output end 1 simultaneously
The integrated amplification chip U9 of connection 3 pin, resistance R94 ~ R95 one end, resistance R95 other end ground connection, resistance R94 other end string
Join electric capacity C34 ground connection.Resistance R92 is connected between integrated amplification chip U9 4 pin and 1 pin.Integrated amplification chip U9 output
Hold 1 pin, series resistance R11 integrated amplification chip U7 simultaneously in parallel afterwards 1 pin and 3 pin, integrated amplification chip U7 1 pin and 4
Resistance R91 is connected between pin.The integrated amplification chip U7 pin of output end 1 while parallel resistance R90 and electric capacity C2 one end,
Electric capacity C2 other end ground connection, resistance R90 other end connection integrated chip U28 2 pin.
Integrated chip U28 3 pin while parallel resistance R64 one end and potentiometer PR9 one end, resistance R64's is another
One end is grounded, potentiometer the PR9 other end and adjustable side connection+5V dc sources.The parallel connection simultaneously of integrated chip U28 4 pin-
One end of 5V dc sources and electric capacity C48, electric capacity C48 other end ground connection.Integrated chip U28 5 pin ground connection, 8 pin are simultaneously
Shunt capacitance C47 one end and+5V dc sources, electric capacity C47 other end ground connection.Integrated chip U28 7 pin are simultaneously in parallel
Resistance R63 one end, resistance R36 one end and electric capacity C45 one end, resistance R63 other end parallel connection integrated chip U28's
2 pin, resistance R36 and electric capacity the C45 other end while connecting triode Q3 base stage, triode Q3 grounded emitter, collection
One end of electrode while parallel resistance R76 and resistance R79, resistance R76 other end connection 3.3V dc sources, resistance R79's
The other end connects above-mentioned single-chip microcomputer U14 25 pin.
The shelf depreciation amplitude that integrated chip U24 and its peripheral circuit are formed in above-mentioned cable local discharge detection unit is adjusted
Mould preparation block, the amplitude of the local discharge signal for local discharge sensor to be exported reduce；Integrated amplification chip U11, U9 with
And U7 and its external circuit form the local discharge signal filtration module in above-mentioned cable Partial Discharge Detection unit, to shelf depreciation
Signal is filtered processing；The part that integrated chip U28 and its external circuit are formed in above-mentioned cable Partial Discharge Detection unit is put
Electric signal comparison module, triode Q3 models 9018, above-mentioned local discharge signal Shaping Module is formed, shelf depreciation is believed
Number the amplitude of waveform 3.3V is shaped as by 5V, 3.3V signals are delivered in single-chip microcomputer U14.
As shown in figure 21, above-mentioned insulation current acquisition module includes model LM358 integrated amplifier chip U4（Bag
Include integrated amplifier chip U4A ~ U4B）With integrated amplifier chip U6（Including integrated amplifier chip U6A ~ U6B）, model
UAF42AU integrated chip U16, model 6N137 optocoupler U20 and model LM360 integrated chip U25 ~ U26.Connect
Line terminals J2 is used for the original insulation current signal for accessing the input of insulating signal transformer, and original insulation current signal first passes around
The amplifying circuit of integrated amplifier chip U4A and resistance R19 ~ R20, resistance R39 ~ R40 composition is amplified, then by collection
Bandpass filter into chip U16 compositions is filtered, and obtains more pure 22Hz insulation current signal.
The integrated amplifier chip U4A pin of output end 1 is connected with integrated chip U16 3 pin, integrated chip U16 5 pin,
12 pin are grounded, and 4 pin series resistance RQ2 ground connection, 8 pin are sequentially connected in series potentiometer PR5 and the pin of resistance RF4 connections 16.Integrated chip
U16 10 pin and 11 pin connect -5V dc sources and+5V dc sources, integrated chip U16 10 pin while shunt capacitance respectively
C68 ~ C69 is grounded, and shunt capacitance C77 ~ C78 is grounded 11 pin simultaneously.Integrated chip U16 14 pin are sequentially connected in series resistance R41 and electricity
The pin of position device PR6 connections 9, resistance R2 is parallel between 13 pin and 14 pin simultaneously.
The insulation current signal of the integrated chip U16 pin of output end 8 output first passes around integrated amplification chip U4B compositions
Range-adjusting circuit, from the integrated amplifier chip U4B pin leading-out terminal F1 of output end 7, the signal that terminal F1 is drawn is insulation
The amplitude signal of electric current is connected to above-mentioned amplitude collection handover module.Signal through integrated amplifier chip U4B outputs is simultaneously
Signal amplification is carried out by the two-stage amplifying circuit being made up of integrated amplifier chip U6A ~ U6B, by the signal amplified twice
Optocoupler U20 is first fed into, signal carries out waveform reversion, the signal after reversion from after optocoupler U20 outputs by NOT gate chip U15A
It is sequentially connected in series 2 pin that resistance R52 and resistance R7 is sent into integrated chip U25 afterwards.
Integrated chip U25 3 pin while parallel resistance R51 one end and diode D8 anode, resistance R51's is another
Hold connection+5V dc sources, diode D8 other end ground connection.While integrated chip U25 4 pin connection -5V dc sources
It is grounded, is grounded by electric capacity C24 while integrated chip U25 8 pin connection+5V dc sources, integrated chip by electric capacity C23
Resistance R65 is parallel between U25 7 pin and 2 pin simultaneously.Integrated chip U25 and resistance R51 ~ R52, resistance R65, electric capacity C23
~ C24 and diode D8 composition first order high speed shaping circuits, insulation current signal carry out whole through first order high speed shaping circuit
Enter after shape and form the by integrated chip U26 and resistance R53 ~ R54, resistance R68, electric capacity C25 ~ C26 and diode D9
Two level high speed shaping circuit carries out secondary high speed shaping, and the square-wave signal X1 of standard is obtained as insulation current after secondary reshaping
Phase data exported by the integrated chip U26 pin of output end 7.
It follows that integrated amplifier chip U4A and accessory circuit form above-mentioned insulation current comparison circuit, integrate
Chip U16 and its accessory circuit form above-mentioned insulation current bandwidth-limited circuit, integrated amplifier chip U4B and its attached electricity
Road forms above-mentioned insulation current and follows circuit.The two-stage amplifying circuit of integrated amplifier chip U6A ~ U6B compositions is above-mentioned
The secondary comparison circuit of insulation current, optocoupler 20 and NOT gate chip U15A form above-mentioned insulation current shaping circuit, integrate core
The two-stage high speed circuit of piece U25 ~ U26 compositions is above-mentioned insulation current high speed comparison circuit.
As shown in figure 22, above-mentioned insulation voltage acquisition module includes model LM358 integrated amplifier chip U10
（Including integrated amplifier chip U10A ~ U10B）, model UAF42AU integrated chip U17, model 6N137 optocoupler U23
And model LM360 integrated chip U27.Binding post J10 is used for the original insulation for accessing the input of insulating signal transformer
Voltage signal, the bandpass filter that original insulation voltage signal first passes around integrated chip U17 compositions are filtered, obtained more
Pure 22Hz insulation voltage signal.
Binding post J10 1 pin is connected with integrated chip U17 3 pin, integrated chip U17 5 pin, 12 pin ground connection, 4 pin
Series resistance RQ3 is grounded, and 8 pin are sequentially connected in series potentiometer PR7 and the pin of resistance RF4 connections 16.Integrated chip U17 10 pin and 11
Pin connects -5V dc sources and+5V dc sources respectively, and shunt capacitance C70 ~ C71 is grounded integrated chip U17 10 pin simultaneously,
Shunt capacitance C79 ~ C80 is grounded 11 pin simultaneously.Integrated chip U17 14 pin are sequentially connected in series resistance RF5 and connect 9 with potentiometer PR8
Pin, resistance R3 is parallel with simultaneously between 13 pin and 14 pin.
Integrated chip U17 the pin of output end 8 output insulation voltage signal successively pass through by integrated amplifier chip U10A ~
The two-stage amplifying circuit of U10B compositions carries out signal amplification, and optocoupler U23 is first fed into by the signal amplified twice, is put from integrated
Big device chip U10A output end leading-out terminal F2, terminal F2 is used for the amplitude data for drawing insulation voltage signal.Signal is from light
Connecting triode Q2 base stage after coupling U23 outputs.Triode Q2 grounded emitter.It is same after+5V dc source series resistances R59
Shi Binglian triodes Q2 colelctor electrode and integrated chip U27 2 pin.
Integrated chip U27 3 pin while parallel resistance R60 one end and diode D10 anode, resistance R60's is another
One end connection+5V dc sources, diode D10 other end ground connection.Integrated chip U27 4 pin connection -5V dc sources it is same
When be grounded by electric capacity C40, be grounded by electric capacity C43 while integrated chip U25 8 pin connection+5V dc sources, integrate core
Resistance R87 is parallel between piece U27 7 pin and 2 pin simultaneously.The square-wave signal X2 conducts of integrated chip U25 7 pin outputting standards
The phase data of insulation voltage.
It follows that integrated chip U17 and its accessory circuit form above-mentioned insulation voltage bandwidth-limited circuit, it is integrated to put
Big device chip U10A and its accessory circuit form above-mentioned insulation voltage and follow circuit, integrated amplifier chip U10B and its attached
Circuit forms above-mentioned insulation voltage comparison circuit, the above-mentioned insulation current shaping circuit of optocoupler 23, and triode Q2 is above-mentioned
Insulation voltage range of decrease circuit, integrated chip U27 form above-mentioned insulation voltage high speed comparison circuit.
As shown in figure 23, above-mentioned zero-sequence current acquisition module includes model LM358 integrated amplifier chip U8（Bag
Include integrated amplifier chip U8A ~ U8B）, model UAF42AU integrated chip U18 and model 6N137 optocoupler U21.
Binding post J4 is used for the secondary side for connecting zero sequence current mutual inductor, accesses zero sequence current signal, zero sequence current signal passes through first
The bandpass filter for crossing integrated chip U18 compositions is filtered, and obtains more pure 50Hz zero sequence current signal.
Binding post J4 1 pin is connected with integrated chip U18 3 pin, integrated chip U18 5 pin, 12 pin ground connection, 4 pin strings
Join resistance RQ4 ground connection, 8 pin are sequentially connected in series potentiometer PR3 and the pin of resistance RF7 connections 16.Integrated chip U18 10 pin and 11 pin
Connection -5V dc sources and+5V dc sources respectively, shunt capacitance C72 ~ C73 is grounded integrated chip U18 10 pin simultaneously, and 11
Shunt capacitance C81 ~ C82 is grounded pin simultaneously.Integrated chip U18 14 pin are sequentially connected in series resistance RF3 and connect 9 pin with potentiometer PR4,
Resistance R4 is parallel between 13 pin and 14 pin simultaneously.
The zero sequence current signal of the integrated chip U18 pin of output end 8 output is first passed around by integrated amplifier chip U8A groups
Into follow circuit, integrated amplifier chip U8A output end leading-out terminal F3, pass through terminal F3 and draw zero sequence current signal
Amplitude data delivers to amplitude collection handover module.Enter after the integrated amplifier chip U8 pin series resistance R34 of output end 1 by collecting
Amplifying circuit into amplifier chip U10B compositions carries out signal amplification, and the signal by amplification is sent into optocoupler U23, optocoupler U23
The signal X3 of output is that the phase signal of zero-sequence current is exported.
It follows that integrated chip U18 and its accessory circuit form above-mentioned zero-sequence current bandwidth-limited circuit, it is integrated to put
Big device chip U8A and its accessory circuit form above-mentioned zero-sequence current and follow circuit, integrated amplifier chip U10B and its attached
Circuit forms above-mentioned zero sequence current signal comparison circuit, and optocoupler 23 is above-mentioned zero-sequence current shaping circuit.
As shown in figure 24, above-mentioned residual voltage acquisition module, which includes above-mentioned zero-sequence current acquisition module, includes model
LM358 integrated amplifier chip U3 and model UAF42AU integrated chip U1.Binding post J1 is used to connect zero sequence electricity
The secondary side of transformer is pressed, accesses residual voltage signal, residual voltage signal first passes around the band logical filter of integrated chip U1 compositions
Ripple device is filtered, and obtains more pure 50Hz zero sequence current signal.
Binding post J1 1 pin is connected with integrated chip U18 3 pin, integrated chip U1 5 pin, 12 pin ground connection, 4 pin strings
Join resistance RQ1 ground connection, 8 pin are sequentially connected in series potentiometer PR2 and the pin of resistance RF2 connections 16.Integrated chip U1 10 pin and 11 pin
Connection -5V dc sources and+5V dc sources respectively, shunt capacitance C66 ~ C67 is grounded integrated chip U1 10 pin simultaneously, 11 pin
Shunt capacitance C75 ~ C76 ground connection simultaneously.Integrated chip U1 14 pin are sequentially connected in series resistance RF1 and connect 9 pin with potentiometer PR1, and 13
Resistance R1 is parallel between pin and 14 pin simultaneously.
The residual voltage signal of the integrated chip U18 pin of output end 8 output passes through what is be made up of integrated amplifier chip U3
Circuit is followed, integrated amplifier chip U3 output end leading-out terminal F4, passes through the amplitude of terminal F4 extraction residual voltage signals
Data.It follows that integrated chip U1 and its accessory circuit form above-mentioned residual voltage bandwidth-limited circuit, integrated amplifier
Chip U3 and its accessory circuit form above-mentioned residual voltage.
As shown in figure 25, above-mentioned amplitude collection handover module and RMS conversion module are respectively by model
CD4051 integrated chip U31 and model AD637 integrated chip U5 are realized.The signal that above-mentioned terminal F1 is drawn is insulation
The amplitude data of electric current is connected to integrated chip U31 13 pin；The signal that above-mentioned terminal F2 is drawn is the amplitude number of insulation voltage
According to 14 pin for being connected to integrated chip U31；The signal that above-mentioned terminal F3 is drawn is connected to integrated for the amplitude data of zero-sequence current
Chip U31 15 pin；The signal that terminal F4 is drawn is connected to integrated chip U31 12 pin for the amplitude data of residual voltage.Collection
Into chip U31 play a part of switching switch, can according to presetting time interval by four groups of above-mentioned amplitude datas circulate into
Row output, output end 3 pin of the signal through integrated chip U31 of output delivered in integrated chip U5, integrated chip U31 11 pin and
10 pin are respectively connecting to single-chip microcomputer U14 52 pin, 53 pin.
The data of integrated chip U31 outputs deliver to integrated chip U5 13 pin, integrated chip U5 3 ~ 4 pin through electric capacity C96
Ground connection, 6 pin are grounded by electric capacity C95, and electric capacity C11 is parallel between integrated chip U5 8 pin, 9 pin, in parallel between 6 pin and 9 pin
There is potentiometer R84.Integrated chip U5 10 pin and 11 pin connect -5V dc sources and+5V dc sources, integrated chip U5 respectively
10 pin simultaneously shunt capacitance C97 ~ C98 ground connection, 11 pin simultaneously shunt capacitance C37 ~ C38 ground connection.Integrated chip U5 14 pin lead to
Cross 1 pin of integrated chip U13 in the above-mentioned AD conversion unit of resistance R5 connections.
As shown in figure 26, the two-way NOR gate circuit in above-mentioned phase acquisition processing unit by XOR gate chip U29A ~
U29B realizes that the phase data X1 of above-mentioned insulation current and the phase data X2 of insulation voltage are respectively connected to XOR gate chip
U29A two inputs.One of the phase data X3 and model 6N137 of above-mentioned zero-sequence current integrated chip U22 formation
Standard block signal together accesses XOR gate chip U29B two inputs.
XOR gate chip U29A output end while parallel resistance R55 and electric capacity C44 access triode Q1 base stage, three
Pole pipe Q1 grounded emitter, colelctor electrode while parallel resistance R75 and resistance R78 one end, resistance R75 other end connection
3.3V dc sources, resistance R78 other end connection integrated chip U32 13 pin, integrated chip U32 model CD4051, it is
Above-mentioned phase acquisition handover module.
XOR gate chip U29B output end while parallel resistance R62 and electric capacity C46 access triode Q4 base stage, three
Pole pipe Q4 grounded emitter, colelctor electrode while parallel resistance R88 and resistance R89 one end, resistance R88 other end connection
3.3V dc sources, resistance R89 other end connection integrated chip U32 14 pin.
Integrated chip U32 equally plays a part of switching switch, can be according to presetting time interval by two groups of number of phases
Exported according to circulation, after the pin of output end 3 difference parallel resistance R30 and resistance R31 of the signal through integrated chip U32 of output
Single-chip microcomputer U14 23 pin and 67 pin are delivered to respectively.Integrated chip U32 11 pin and 10 pin are respectively connecting to the 81 of single-chip microcomputer U14
Pin, 82 pin.
The above described is only a preferred embodiment of the present invention, being not the limitation for making other forms to the present invention, appoint
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
Imitate embodiment.But it is every without departing from technical solution of the present invention content, the technical spirit according to the present invention is to above example institute
Any simple modification, equivalent variations and the remodeling made, still fall within the protection domain of technical solution of the present invention.
Claims (7)
1. cable status monitors warning data integrated processing terminal on-line, it is characterised in that：A shell is provided with, it is solid in shell
Surely there is control circuit, control circuit is connected with monitored cable, and control circuit comprises at least：
Cable connector temperature measuring unit, for being monitored in real time to the connector temperature for being monitored cable；
Cable local discharge detection unit, the shelf depreciation situation of cable is monitored；
Cable insulation monitors unit on-line, for carrying out on-line real time monitoring to the state of insulation of cable；
And CPU, for receiving, handling cable connector temperature measuring unit, cable local discharge detection unit and electricity
The data of cable insulated on-line monitoring unit monitoring；
Described cable insulation on-line monitoring unit includes data acquisition end and data processing end, described data acquisition end bag
Include：Zero sequence signal acquisition module and insulating signal acquisition module, described data processing end include amplitude acquisition processing module with
And phase acquisition processing module；
Zero sequence signal acquisition module and insulating signal acquisition module are connected with amplitude acquisition processing module, amplitude acquisition processing module
It is connected with CPU；
Zero sequence signal acquisition module and insulating signal acquisition module are connected with phase acquisition processing module simultaneously, phase acquisition processing
Module is connected with CPU；
Described zero sequence signal acquisition module, including：
Zero-sequence current acquisition module, its input is connected with the secondary side of zero sequence current mutual inductor in cable, for collecting
Zero-sequence current amplitude data and zero-sequence current phase data simultaneously deliver to amplitude acquisition processing module and phase acquisition processing mould respectively
Block；
Residual voltage acquisition module, its input is connected with the secondary side of zero sequential potential transformer in cable, for collecting
Residual voltage amplitude data simultaneously delivers to amplitude acquisition processing module；
Described insulating signal acquisition module, including：
Insulation current acquisition module, its input is connected with the secondary side of insulating signal transformer, for collecting insulated electro
Stream amplitude data and insulation current phase data simultaneously deliver to amplitude acquisition processing module and phase acquisition processing module respectively；
Insulation voltage acquisition module, its input is connected with the secondary side of insulating signal transformer, for collecting insulated electro
Pressure amplitude Value Data and insulation voltage phase data simultaneously deliver to amplitude acquisition processing module and phase acquisition processing module respectively；
Described zero-sequence current acquisition module include the zero-sequence current bandpass filter, the zero-sequence current that are sequentially connected follow circuit,
Zero sequence current signal comparison circuit and zero-sequence current waveform shaping circuit；
The described zero sequence current mutual inductor of zero-sequence current bandpass filter input connection, the output of zero-sequence current waveform shaping circuit
End is drawn zero-sequence current phase data and is connected with phase acquisition processing module, and zero-sequence current follows circuit output end while extraction zero
Sequence current amplitude data are connected with amplitude acquisition processing module；
Cable local discharge detection unit includes shelf depreciation range-adjusting module, local discharge signal filtration module, part and put
Electric signal comparison module and local discharge signal Shaping Module, the signal access shelf depreciation width of local discharge sensor output
Be worth adjusting module, shelf depreciation range-adjusting module, local discharge signal filtration module, local discharge signal comparison module and
Local discharge signal Shaping Module is sequentially connected, and local discharge signal Shaping Module is connected with CPU.
2. cable status according to claim 1 monitors warning data integrated processing terminal on-line, it is characterised in that：It is described
Insulation voltage acquisition module include the insulation voltage bandwidth-limited circuit, the insulation voltage that are sequentially connected and follow circuit, insulated electro
Press comparison circuit, insulation voltage shaping circuit, insulation voltage range of decrease circuit and insulation voltage high speed comparison circuit；
Insulation voltage bandwidth-limited circuit is connected with insulating signal transformer, and the output end of insulation voltage high speed comparison circuit is drawn
Insulation voltage phase data is connected with phase acquisition processing module, and the output end of self-insulating voltage follower circuit draws insulation simultaneously
Voltage magnitude data are connected with amplitude acquisition processing module.
3. cable status according to claim 1 monitors warning data integrated processing terminal on-line, it is characterised in that：It is described
Insulation current acquisition module include be sequentially connected insulation current comparison circuit, insulation current bandwidth-limited circuit, insulated electro
Stream follows the secondary comparison circuit of circuit, insulation current, insulation current shaping circuit and insulation current high speed comparison circuit；
Insulation current comparison circuit is connected with insulating signal transformer, and the output end of insulation current high speed comparison circuit draws insulation
Current phase data are connected with phase acquisition processing module, and the output end of self-insulating current follower circuit draws insulation current simultaneously
Amplitude data is connected with amplitude acquisition processing module.
4. cable status according to claim 1 monitors warning data integrated processing terminal on-line, it is characterised in that：It is described
Residual voltage acquisition module include residual voltage bandwidth-limited circuit and residual voltage and follow circuit, residual voltage bandpass filtering
Circuit is connected with zero sequential potential transformer, and residual voltage follows circuit output end to draw residual voltage amplitude data and gathered with amplitude
Processing module is connected.
5. the cable status on-line monitoring warning data integrated processing terminal according to any one of claim 1 ~ 4, its feature
It is：Described amplitude acquisition processing module includes：
Amplitude gathers handover module, for receiving and switching zero-sequence current amplitude data, the residual voltage amplitude number of output cable
According to, insulation current amplitude data, insulation voltage amplitude data；
RMS conversion module, its input are connected with amplitude collection handover module output end, are cut for changing amplitude collection
Change the mold the data of block output；
Analog-to-digital conversion module, its input connection RMS conversion module output end, its output end connection CPU.
6. the cable status on-line monitoring warning data integrated processing terminal according to any one of claim 1 ~ 3, its feature
It is：Described phase acquisition processing module includes：
Two groups of NOR gate circuits：Two groups of inputs receive insulation current phase data and insulation voltage phase data, zero respectively
Sequence current phase data and all the way standard block data；
Phase acquisition handover module, its input are respectively connected to the output end of two groups of NOR gate circuits, its output end connection center
Processing unit.
7. the cable status on-line monitoring warning data integrated processing terminal according to any one of claim 1 ~ 3, its feature
It is：Described insulating signal transformer includes one using core body made of foam and golden material, and is wrapped in the core body
On two groups of coils, one of which coil is connected between cable screening wire and earth terminal, and another group of coil connects insulated electro
Flow acquisition module and insulation voltage acquisition module and the voltage injection device for injecting 22Hz voltage signals to screen layer.
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| CN106405348A (en) * | 2016-08-30 | 2017-02-15 | 合肥智博电气有限公司 | Electric cable insulation detection apparatus collection system |
| EP3850380A1 (en) | 2018-09-10 | 2021-07-21 | 3M Innovative Properties Company | Electrical power cable monitoring device using low side electrode and earth ground separation |
| WO2020055667A2 (en) | 2018-09-10 | 2020-03-19 | 3M Innovative Properties Company | Electrical power cable monitoring device including partial discharge sensor |
| CN112840516B (en) | 2018-09-10 | 2023-03-31 | 3M创新有限公司 | Support structure for cable and cable accessory condition monitoring device |
| US12062891B2 (en) | 2018-12-21 | 2024-08-13 | 3M Innovative Properties Company | Electrical power cable preparation device |
| WO2021138569A1 (en) | 2019-12-31 | 2021-07-08 | 3M Innovative Properties Company | Monitoring system for evaluating a condition of an electrical grid |
| CN111769649B (en) * | 2020-07-31 | 2023-07-21 | 国网山东省电力公司寿光市供电公司 | Cable intermediate head monitoring system |
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