CN105043457A - Cable state on-line monitoring and early warning data integrated processing terminal - Google Patents
Cable state on-line monitoring and early warning data integrated processing terminal Download PDFInfo
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Abstract
The invention relates to a cable state on-line monitoring and early warning data integrated processing terminal. The cable state on-line monitoring and early warning data integrated processing terminal is characterized in that the integrated processing terminal is provided with a shell; a control circuit is fixed in the shell; the control circuit is connected with a monitored cable; the control circuit at least comprises a cable connector wireless temperature measuring unit for monitoring the temperature of the connector of the monitored cable in real time, a cable partial discharge detection unit used for monitoring the partial discharge situation of the cable, a cable insulation on-line monitoring unit used for monitoring the insulation state of the cable in real time, and a central processing unit which is used for receiving and processing data monitored by the above units. The cable connector wireless temperature measuring unit, the cable partial discharge detection unit and the cable insulation on-line monitoring unit are arranged in the cable state on-line monitoring and early warning data integrated processing terminal, and therefore, a plurality of parameters of the cable can be acquired and processed simultaneously, and comprehensive judgment can be performed on the operating state of the cable conveniently.
Description
Technical field
Cable status on-line monitoring warning data integrated processing terminal, belongs to Cable Fault Detection Technology field.
Background technology
Cable is requisite transmission apparatus in power industry, and the actual motion state therefore grasping cable ensures that can cable the necessary condition of reliably working.In existing cable status detection system, ubiquity has following defect:
(1) monitoring project is single.Only a certain item performance data of cable is gathered, therefore master system can not grasp multiple state parameters of cable comprehensively, so there is no the state of enough criterions to cable accurately judge, if therefore need to judge multiple states of cable, then need to be equipped with multiple system, cost is higher.
(2) the online judgement to cable insulation state cannot be realized.The quality of cable insulation is the key factor affecting cable security reliability service, and in the actual moving process of cable, most of cable fault causes because deterioration occurs cable insulation.Cable structurally generally comprises outside insulation course and screen layer, and when insulation course occurs damaged, the insulating property of cable can decline.Equivalence can there be stake resistance and direct earth capacitance cable and earth terminal time, and when cable performance declines, the numerical value of stake resistance and direct earth capacitance all can change.
Existing cable insulation method of testing, after screen layer and earth terminal open circuit, in screen layer, inject the insulating property of large voltage to cable test, because cable is in operational process, require the necessary ground connection of screen layer, and can not more than 50V to the magnitude of voltage of screen layer injecting voltage, therefore on-line testing cannot be carried out to the insulating property of cable in the prior art, carry out after cable must being had a power failure, and once cable is had a power failure, can impact the electricity consumption of a large amount of users, even can cause immeasurable economic loss.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiencies in the prior art, there is provided a kind of to test multiple parameters of cable simultaneously, particularly can carry out on-line testing to the state of insulation of cable, the convenient cable status on-line monitoring warning data integrated processing terminal running status of cable being carried out to comprehensive descision.
The technical solution adopted for the present invention to solve the technical problems is: should
Cable status on-line monitoring warning data integrated processing terminal, it is characterized in that: be provided with a shell, be fixed with control circuit in the enclosure, control circuit is connected with monitored cable, and control circuit at least comprises:
Cable splice temperature measuring unit, for carrying out Real-Time Monitoring to the connector temperature of monitored cable;
Cable local discharge detecting unit, monitors the shelf depreciation situation of cable;
Cable insulation on-line monitoring unit, for carrying out on-line real time monitoring to the state of insulation of cable;
And CPU (central processing unit), for receiving, processing the data of above-mentioned each unit monitoring.
Preferably, described cable insulation on-line monitoring unit comprises data acquisition end and data processing end, described data acquisition end comprises: zero sequence signal acquisition module and insulating signal acquisition module, and described data processing end comprises amplitude acquisition processing module and phase acquisition processing module;
Zero sequence signal acquisition module is connected with amplitude acquisition processing module with insulating signal acquisition module, and amplitude acquisition processing module is connected with CPU (central processing unit);
Zero sequence signal acquisition module is connected with phase acquisition processing module with insulating signal acquisition module simultaneously, and phase acquisition processing module is connected with CPU (central processing unit).
Preferably, described zero sequence signal acquisition module, comprising:
Zero-sequence current acquisition module, its input end 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 and delivering to amplitude acquisition processing module and phase acquisition processing module respectively;
Residual voltage acquisition module, its input end is connected with the secondary side of zero sequential potential transformer in cable, for collecting residual voltage amplitude data and delivering to amplitude acquisition processing module;
Described insulating signal acquisition module, comprising:
Insulation current acquisition module, its input end is connected with the secondary side of insulating signal mutual inductor, for collecting insulation current amplitude data and insulation current phase data and delivering to amplitude acquisition processing module and phase acquisition processing module respectively;
Insulation voltage acquisition module, its input end is connected with the secondary side of insulating signal mutual inductor, for collecting insulation voltage amplitude data and insulation voltage phase data and delivering to amplitude acquisition processing module and phase acquisition processing module respectively.
Preferably, described zero-sequence current acquisition module comprises the zero-sequence current bandpass filter, zero-sequence current follow circuit, zero sequence current signal comparator circuit and the zero-sequence current waveform shaping circuit that are connected successively;
Zero sequence current mutual inductor described in zero-sequence current bandpass filter input end connects, zero-sequence current waveform shaping circuit output terminal is drawn zero-sequence current phase data and is connected with phase acquisition processing module, and zero-sequence current follow circuit output terminal is drawn zero-sequence current amplitude data simultaneously and is connected with amplitude acquisition processing module.
Preferably, described insulation voltage acquisition module comprises the insulation voltage bandwidth-limited circuit, insulation voltage follow circuit, insulation voltage comparator circuit, insulation voltage shaping circuit, insulation voltage range of decrease circuit and the insulation voltage high speed comparator circuit that are connected successively;
Insulation voltage bandwidth-limited circuit is connected with insulating signal mutual inductor, the output terminal of insulation voltage high speed comparator circuit is drawn insulation voltage phase data and is connected with phase acquisition processing module, draws insulation voltage amplitude data be simultaneously connected with amplitude acquisition processing module from the output terminal of insulation voltage follower circuit.
Preferably, described insulation current acquisition module comprises the insulation current comparator circuit, insulation current bandwidth-limited circuit, insulation current follow circuit, insulation current secondary comparator circuit, insulation current shaping circuit and the insulation current high speed comparator circuit that are connected successively;
Insulation current comparator circuit is connected with insulating signal mutual inductor, the output terminal of insulation current high speed comparator circuit is drawn insulation current phase data and is connected with phase acquisition processing module, draws insulation current amplitude data be simultaneously connected with amplitude acquisition processing module from the output terminal of insulation current follower circuit.
Preferably, described zero-sequence current acquisition module comprises residual voltage bandwidth-limited circuit and residual voltage follow circuit, residual voltage bandwidth-limited circuit is connected with zero sequential potential transformer, and residual voltage follow circuit output terminal is drawn residual voltage amplitude data and is connected with amplitude acquisition processing module.
Preferably, described amplitude acquisition processing module comprises:
Amplitude gathers handover module, for receiving and switch zero-sequence current amplitude data, residual voltage amplitude data, insulation current amplitude data, the insulation voltage amplitude data of output cable;
RMS conversion module, its input end and amplitude gather handover module output terminal and are connected, and gather the data of handover module output for changing amplitude;
Analog-to-digital conversion module, its input end connects RMS conversion module output terminal, and its output terminal connects CPU (central processing unit).
Preferably, described phase acquisition processing module comprises:
Two groups of NOR gate circuits: two groups of input ends receive insulation current phase data and insulation voltage phase data, zero-sequence current phase data and road sign quasi-square wave data respectively;
Phase acquisition handover module, its input end accesses the output terminal of two groups of NOR gate circuits respectively, and its output terminal connects CPU (central processing unit).
Preferably, described insulating signal mutual inductor comprises a core body adopting foam and golden material to make, and the two groups of coils be wrapped on this core body, wherein one group of coil is connected between cable screening wire and earth terminal, and another group coil connects insulation current acquisition module and insulation voltage acquisition module and the voltage injection device for injecting 22Hz voltage signal to screen layer.
Compared with prior art, the beneficial effect that the present invention has is:
1, in this cable status on-line monitoring warning data integrated processing terminal, be provided with cable splice wireless temperature measurement unit, cable local discharge detecting unit and cable insulation on-line monitoring unit simultaneously, acquisition and processing can be carried out to multiple parameters of cable simultaneously, conveniently comprehensive descision be carried out to the running status of cable.
2, by arranging cable insulation on-line monitoring unit, achieving and online the state of insulation of cable being monitored, contributing to Timeliness coverage cable insulation fault, ensure that the safety of cable, reliability service.
3, by the zero-sequence current acquisition module in cable insulation on-line monitoring unit, residual voltage acquisition module, insulation current acquisition module and insulation voltage acquisition module, can respectively the amplitude of the parameters in cable and phase data be gathered and be analyzed, the criterion of cable insulation is more sufficient, and result of determination is more accurate.
4, by arranging amplitude and gather handover module copying in acquisition module, the data received can be carried out circulation output according to setting interval, RMS conversion module is set simultaneously, achieve and RMS-DC converter is carried out to the signal of 22Hz and 50Hz simultaneously.
5, by arranging the insulating signal mutual inductor of foamed alloy material, when actual measurement, injection and the reception of 22Hz voltage signal can be realized, judging online by achieving cable insulation to the data received.By the frequency of injecting voltage is set to 22Hz, effectively can avoids mixing with itself signal in cable, ensure that the validity of Signal reception and extraction.
Accompanying drawing explanation
Fig. 1 is cable status on-line monitoring warning data integrated processing terminal functional-block diagram.
Fig. 2 is cable insulation on-line monitoring unit functional-block diagram.
Fig. 3 is cable insulation on-line monitoring unit amplitude acquisition process unit functional-block diagram.
Fig. 4 is cable insulation on-line monitoring unit phase acquisition processing unit functional-block diagram.
Fig. 5 is cable insulation on-line monitoring unit zero-sequence current acquisition module functional-block diagram.
Fig. 6 is cable insulation on-line monitoring unit residual voltage acquisition module functional-block diagram.
Fig. 7 is cable insulation on-line monitoring unit insulation current acquisition module functional-block diagram.
Fig. 8 is cable insulation on-line monitoring unit insulation voltage acquisition module functional-block diagram.
Fig. 9 is cable status on-line monitoring warning data integrated processing terminal Partial Discharge Detection unit functional-block diagram.
Figure 10 ~ 12 are cable status on-line monitoring warning data integrated processing terminal power supply unit circuit theory diagrams.
Figure 13 is cable status on-line monitoring warning data integrated processing terminal communication unit circuit theory diagrams.
Figure 14 is cable status on-line monitoring warning data integrated processing terminal storage unit circuit schematic diagram.
Figure 15 is cable status on-line monitoring warning data integrated processing terminal AD conversion unit circuit theory diagrams.
Figure 16 ~ 19 are cable status on-line monitoring warning data integrated processing terminal power supply unit circuit theory diagrams.
Figure 20 is cable status on-line monitoring warning data integrated processing terminal Partial Discharge Detection element circuit schematic diagram.
Figure 21 is cable status on-line monitoring warning data integrated processing terminal insulation current acquisition module circuit theory diagrams.
Figure 22 is cable status on-line monitoring warning data integrated processing terminal insulation voltage acquisition module circuit theory diagrams.
Figure 23 is cable status on-line monitoring warning data integrated processing terminal zero-sequence current acquisition module circuit theory diagrams.
Figure 24 is cable status on-line monitoring warning data integrated processing terminal residual voltage acquisition module circuit theory diagrams.
Figure 25 is cable status on-line monitoring warning data integrated processing terminal amplitude acquisition processing module circuit theory diagrams.
Figure 26 is cable status on-line monitoring warning data integrated processing terminal phase acquisition processing module circuit theory diagrams.
Embodiment
Fig. 1 ~ 26 are most preferred embodiments of the present invention, and below in conjunction with accompanying drawing 1 ~ 26, the present invention will be further described.
Cable status on-line monitoring warning data integrated processing terminal, be provided with a shell, be provided with the control circuit of this cable status on-line monitoring warning data integrated processing terminal in the enclosure, as shown in Figure 1, the control circuit of cable status on-line monitoring warning data integrated processing terminal comprises: CPU (central processing unit) and the cable splice wireless temperature measurement unit be connected with CPU (central processing unit), cable insulation on-line monitoring unit and cable local discharge detecting unit, the Real-Time Monitoring to temperature of cable junction can be realized by cable splice wireless temperature measurement unit, and real-time temperature data is delivered in CPU (central processing unit) process, cable splice wireless temperature measurement unit is by existing techniques in realizing, its course of work and principle of work do not repeat them here.Cable insulation on-line monitoring unit is gathered cable side insulation data by mutual inductance original paper, and the data collected is delivered in CPU (central processing unit) and process; Cable local discharge detecting unit can detect the shelf depreciation situation of cable simultaneously, the data measured is delivered in CPU (central processing unit) simultaneously.
In the control circuit of cable status on-line monitoring warning data integrated processing terminal, be also provided with the communication module, memory module and the power supply unit that whole cable status on-line monitoring warning data integrated processing terminal powered that are connected two-way with CPU (central processing unit).Being connected and communication of CPU (central processing unit) and host computer is realized by communication module; Realize the storage of the data that CPU (central processing unit) receives by memory module and call.
As shown in Figure 2, cable insulation on-line condition monitoring unit comprises data acquisition end and data processing end, data acquisition end comprises zero sequence signal acquisition module and insulating signal acquisition module, and data processing end comprises amplitude acquisition processing module and phase acquisition processing module.Zero sequence signal acquisition module and insulating signal acquisition module are connected to form the amplitude acquisition process unit of cable insulation on-line condition monitoring unit respectively with amplitude acquisition processing module; Zero sequence signal acquisition module and insulating signal acquisition module are connected to form the phase acquisition processing unit of cable insulation on-line condition monitoring unit respectively with phase acquisition processing module.
Zero sequence signal acquisition module comprises again zero-sequence current acquisition module and residual voltage acquisition module, zero-sequence current acquisition module obtains amplitude data and the phase data of cable zero-sequence current by the zero sequence current mutual inductor arranged in the cable, and residual voltage acquisition module obtains amplitude data and the phase data of zero in cable sequence voltage by the zero sequential potential transformer arranged in the cable.Insulating signal acquisition module comprises again insulation current acquisition module and insulation voltage acquisition module.Insulation acquisition module can be gathered the insulation current signal of cable and insulation voltage signal respectively by insulating signal mutual inductor, and obtained amplitude data and the phase data of cable insulation electric current respectively by insulating signal acquisition module, the amplitude data of insulation voltage and phase data.
Insulating signal mutual inductor comprises a core body adopting foam and golden material to make, and the two groups of coils be wrapped on this core body, wherein one group of coil is connected between cable screening wire and earth terminal, and another group signal transmitting terminal of coil and receiving end access in the control circuit (hereinafter referred to as control circuit) of this cable status on-line monitoring warning data integrated processing terminal.When actual measurement, control circuit is 22Hz by controlling conventional voltage injection device to injected frequency in the screen layer of cable, voltage is lower than the voltage signal of 50V, owing to having direct earth capacitance and stake resistance between cable and earth terminal, after signal injection, form loop between direct earth capacitance and stake resistance and have corresponding signal feedback, when state of insulation changes, corresponding return data can change.By the voltage signal of 22Hz that returns in the cable screening wire that receives and current signal as the insulating signal of cable by judging the analysis of insulating signal to achieve online judgement to the state of insulation of cable.By the frequency of injecting voltage is set to 22Hz, effectively can avoids mixing with itself signal in cable, ensure that the validity of Signal reception and extraction.
As shown in Figure 3, the amplitude acquisition processing module in the amplitude acquisition process unit of cable insulation on-line condition monitoring unit comprises amplitude and gathers handover module, RMS conversion module and analog-to-digital conversion module.The amplitude data of zero sequence current signal and the amplitude data of residual voltage signal in zero sequence signal acquisition module, and the amplitude data of insulation voltage signal in insulating signal acquisition module and the amplitude data of insulation current signal are delivered to amplitude and are gathered in handover module simultaneously, amplitude gathers the amplitude data that handover module timesharing receives unlike signal, the amplitude data received is sent into the input end of RMS conversion module, RMS conversion module is sent in CPU (central processing unit) after carrying out analog to digital conversion by analog-to-digital conversion module after carrying out RMS-DC converter to the data sent into.
As shown in Figure 4, the amplitude acquisition processing module in the phase acquisition processing unit of cable insulation on-line condition monitoring unit comprises two-way NOR gate circuit and phase acquisition handover module.The phase data of the insulation voltage signal in insulating signal acquisition module and the phase data of insulation current signal send into the input end of a road NOR gate circuit simultaneously; In zero sequence signal acquisition module, the phase data of zero sequence current signal and a road sign quasi-square wave phase signal send into the input end of another road NOR gate circuit, the output terminal of two-way NOR gate circuit is sent in phase acquisition handover module simultaneously, the signal input part of the output terminal access CPU (central processing unit) of phase acquisition handover module.
As shown in Figure 5, zero-sequence current acquisition module comprises zero-sequence current bandpass filter, zero-sequence current follow circuit, zero sequence current signal comparator circuit and zero-sequence current waveform shaping circuit.First the zero sequence current signal collected from zero sequence current mutual inductor carries out bandpass filtering through zero-sequence current bandwidth-limited circuit, obtain the zero sequence current signal of 50Hz, zero sequence current signal sends into the input end of zero-sequence current follow circuit, improve carrying load ability by zero-sequence current follow circuit, obtain the amplitude data of zero-sequence current from the output terminal of zero-sequence current follow circuit.The zero sequence current signal of the output terminal output of zero-sequence current follow circuit obtains the phase data of zero-sequence current successively after zero sequence current signal comparator circuit compares output and the shaping of zero-sequence current waveform shaping circuit.
As shown in Figure 6, residual voltage acquisition module comprises residual voltage bandwidth-limited circuit and residual voltage follow circuit.The residual voltage signal collected from zero sequential potential transformer obtains the amplitude data of residual voltage successively after residual voltage bandwidth-limited circuit, residual voltage follow circuit.
As shown in Figure 7, insulation voltage acquisition module comprises insulation voltage bandwidth-limited circuit, insulation voltage follow circuit, insulation voltage comparator circuit, insulation voltage shaping circuit, insulation voltage range of decrease circuit and insulation voltage high speed comparator circuit.First the insulation voltage signal obtained from insulation signal transformer obtains through insulation voltage bandwidth-limited circuit the insulation voltage signal that frequency is 22Hz, the insulation voltage signal of the 22Hz that filtering obtains is sent into insulation voltage follow circuit and is improved carrying load ability, obtains the amplitude data of insulation voltage from the output terminal of insulation voltage follower circuit.The signal of the output terminal output of insulation voltage range-adjusting circuit is delivered to insulation voltage comparator circuit simultaneously and is compared output, the signal that signal exports relatively is afterwards sent into insulation voltage shaping circuit and is carried out wave shaping, the range of decrease is carried out through insulation voltage drop width circuit after signal shaping completes, then form the square-wave signal of standard after delivering to insulation voltage high speed comparator circuit, this square-wave signal exports as the phase data of insulation voltage.
As shown in Figure 8, insulation current acquisition module comprises insulation current comparator circuit, insulation current bandwidth-limited circuit, insulation current follow circuit, insulation current secondary comparator circuit, insulation current shaping circuit and insulation current high speed comparator circuit.First the insulation current signal obtained from insulation signal transformer compares output through insulation current comparator circuit, then obtain through insulation current strap bandpass filter circuit the insulation current signal that frequency is 22Hz, the insulation current signal of the 22Hz exported through insulation current strap bandpass filter circuit improves the carrying load ability of signal through insulation current follow circuit, then carry out secondary by insulation current secondary comparator circuit to insulation current signal and compare.Through insulation current secondary comparator circuit carry out secondary relatively after insulation current signal again obtain the square-wave signal of standard through insulation current shaping circuit and insulation current high speed comparator circuit, this square-wave signal exports as the phase data of insulation current.
As shown in Figure 9, cable local discharge detecting unit comprises shelf depreciation range-adjusting module, local discharge signal filtration 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 installing in the cable, and this signal is carried out range-adjusting, local discharge signal after range-adjusting carries out after filtering, local discharge signal comparison module and local discharge signal Shaping Module carry out waveform comparison, shaping respectively through local discharge signal filtration module successively, and the local discharge signal after shaping directly delivers to the signal input part of CPU (central processing unit).
As shown in Figure 10 ~ 12, the power supply unit of this cable status on-line monitoring warning data integrated processing terminal comprise by the integrated chip U12 of model to be the integrated chip U2 of WRA4805S-3WR2 and model be AS1117-3.3 form for power conversion circuit.As shown in Figure 10, connection terminal J6 introduces 48V direct supply, 48V direct supply is first through the rectifier bridge of diode D1 ~ D2 composition, the nonpolarity input of direct supply can be realized by rectifier bridge, TVS diode D5 and electric capacity C1 is parallel with between the output head anode and earth terminal of rectifier bridge, one end of the output head anode of rectifier bridge shunt inductance L1 simultaneously, the other end 2 pin of integrated chip U2 in parallel and the positive pole of electric capacity C3 simultaneously of inductance L 1, the minus earth of electric capacity C3.+ 5V direct supply and-5V direct supply is obtained by integrated chip U2.
+ 5V the direct supply be converted to by integrated chip is as shown in figure 11 connected in parallel to 3 pin of integrated chip U12,3.3V direct current signal is converted to through integrated chip U12, electric capacity C58 ~ C59 is parallel with, at 2 pin of integrated chip U12 be parallel with the electric capacity C18 ~ C22 shown in electric capacity C60 ~ C61 and Figure 12 between 4 pin (and output terminal) and 1 pin simultaneously between 3 pin (i.e. input end) and 1 pin (i.e. earth terminal) of integrated chip U12.
As shown in figure 13, the integrated chip U30 that the communication unit of this cable status on-line monitoring warning data integrated processing terminal is MAX1480BEPI by model forms.1 pin of integrated chip U30,2 pin, 8 pin, 10 pin and 14 pin connect direct supply+5V.Once connect NOT gate chip U15D, U15F and resistance R72 of a signal output part of CPU (central processing unit) connects 9 pin of integrated chip U30, and another signal output part series connection NOT gate chip U15E and resistance R71 of CPU (central processing unit) connects 11 pin of integrated chip U30.13 pin ground connection after NOT gate chip U15C, resistance R66 ~ R67 of integrated chip U30,13 pin simultaneously parallel resistance R69 connect direct supply+5V.25 pin of integrated chip U30,23 pin connect 1 pin and 4 pin of connection terminal J9 respectively after resistance in series R80, resistance R81 respectively, are parallel with the protection tube D12 that the protection tube D11 that model is 2RM075L-5 and model are P6KE10CA between 25 pin of integrated chip U30,23 pin simultaneously.Be parallel with the protection tube that model is 3RM075L-6 between 1 pin of connection terminal J9 and 4 pin, 2 pin of connection terminal J9 are in parallel with 4 pin, and 1 pin is in parallel with 3 pin, and connection terminal J9 is connected with host computer as external cabling terminal, realizes communication simultaneously.
As shown in figure 14, the storage unit employing model of this cable status on-line monitoring warning data integrated processing terminal is the integrated chip U19 of FM24W256-G.1 ~ 4 pin ground connection of integrated chip U19,5 pin ~ 7 pin connect the input/output port of CPU (central processing unit) respectively, and 5 pin ~ 7 pin of integrated chip U19 connect direct supply 3.3V respectively by resistance R25 ~ R27 simultaneously.
As shown in figure 15, above-mentioned analog-to-digital conversion module employing model is that the integrated chip U13 of ADS1110 realizes, simulating signal is connected to 1 pin of integrated chip U13 through resistance R5,2 pin of integrated chip U13,6 pin ground connection, 3 pin, 4 pin are connected with the signal input part of CPU (central processing unit), and 3 pin of integrated chip U13,4 pin are distinguished parallel resistance R13 ~ R14 simultaneously and connected 3.3V direct supply.
As shown in figure 16, CPU (central processing unit) adopts signal to be that the single-chip microcomputer U14 of STM32F407VET6 realizes.95 pin and 96 pin, 36 pin of integrated chip U14 are connected 6 pin and 5 pin, 7 pin of integrated chip U19 in above-mentioned storage unit respectively.97 pin of integrated chip U14,98 pin, 1 pin, 2 pin, 3 pin, 4 pin, 5 pin are connected the toggle switch of eight shown in Figure 17 with 38 pin, when single-chip microcomputer U14 connects multiple analog-to-digital conversion module, by realizing to arranging of toggle switch the data that single-chip microcomputer U19 receives corresponding analog-to-digital conversion module.2 pin in connection terminal J8 shown in Figure 18,3 pin and 5 pin are connected with 72 pin of single-chip microcomputer U14,76 pin and 14 pin respectively, 1 pin of connection terminal J8 connects 3.3V direct supply, 4 pin ground connection, connection terminal J8 is for carrying out the emulation testing of single-chip microcomputer U14.
8 pin of single-chip microcomputer U14,9 pin series capacitance C87 ~ C88 ground connection respectively, crystal oscillator Y1 in parallel while of between 8 pin, 9 pin; 12 pin of single-chip microcomputer U14,13 pin series capacitance C90 ~ C91 ground connection respectively, crystal oscillator Y2 in parallel while of between 12 pin, 13 pin.37 pin of single-chip microcomputer U14,94 pin are connected resistance R28, switch S 1 and resistance R29 in Figure 19, switch S 2 ground connection or 3.3V direct supply respectively.92 pin of single-chip microcomputer U14 connect NOT gate chip U15D in above-mentioned communication unit, and 93 pin of single-chip microcomputer U14 are connected in parallel in above-mentioned communication unit between resistance R66 ~ R67, and 51 pin of single-chip microcomputer U14 connect the NOT gate chip U15E in above-mentioned communication unit.86 pin of single-chip microcomputer U14,87 pin connect 2 pin and 3 pin of connection terminal J7 respectively, 1 pin of connection terminal J7 connects 3.3V direct supply, 4 pin ground connection, connection terminal J7, for connecting above-mentioned cable splice wireless temperature measurement unit, can realize the Real-Time Monitoring to temperature of cable junction by cable splice wireless temperature measurement unit.47 pin of single-chip microcomputer U14,48 pin connect 3 pin and 4 pin of integrated chip U13 in above-mentioned analog-to-digital conversion module respectively.3.3V direct supply resistance in series R37 is connected 62 pin of single-chip microcomputer U14 with light emitting diode D6,3.3V direct supply resistance in series R38 is connected 61 pin of single-chip microcomputer U14 with light emitting diode D7.
As shown in figure 20, Partial Discharge Detection unit mainly comprises integrated chip U24 that model is AD8310, model is OPA690 integrated amplification chip U11, U9, U7 and model are the integrated chip U28 of LM360.Connection terminal J5 is for connecting the signal output part of local discharge sensor, and 1 pin series capacitance C54 successively ~ C55, the resistance R77 of connection terminal J5 and electric capacity C33 connect 8 pin of integrated chip U24, the 2 pin ground connection of connection terminal J5.The diode D15 that model is SMJ90A is parallel with between 1 pin of connection terminal and 2 pin, one end of inductance L 5, inductance L 4 and resistance R98 is connected in parallel between electric capacity C54 ~ C55, between electric capacity C55 and resistance R77 and between electric capacity C33 and resistance R77 respectively, one end ground connection of inductance L 5, inductance L 4 and resistance R98.
Connect 3 pin of integrated amplification chip U11 after the 4 pin resistance in series R12 of integrated chip U24, between 1 pin of integrated amplification chip U11 and 4 pin, be parallel with resistance R93.3 pin of integrated amplification chip U9 in parallel, one end of resistance R94 ~ R95 while of after the output terminal 1 pin series diode D14 of integrated chip U24, the other end ground connection of resistance R95, the other end series capacitance C34 ground connection of resistance R94.Resistance R92 is connected with between 4 pin of integrated amplification chip U9 and 1 pin.Output terminal 1 pin of integrated amplification chip U9, simultaneously 1 pin of integrated amplification chip U7 in parallel and 3 pin after resistance in series R11, be connected with resistance R91 between 1 pin of integrated amplification chip U7 and 4 pin.One end of output terminal 1 pin of integrated amplification chip U7 parallel resistance R90 and electric capacity C2 simultaneously, the other end ground connection of electric capacity C2, the other end of resistance R90 connects 2 pin of integrated chip U28.
3 pin one end of parallel resistance R64 and one end of potentiometer PR9 simultaneously of integrated chip U28, the other end ground connection of resistance R64, the other end of potentiometer PR9 and adjustable side connect+5V direct supply.One end of 4 pin of integrated chip U28 simultaneously parallel connection-5V direct supply and electric capacity C48, the other end ground connection of electric capacity C48.The 5 pin ground connection of integrated chip U28,8 pin are one end of shunt capacitance C47 and+5V direct supply simultaneously, the other end ground connection of electric capacity C47.One end of 7 pin of integrated chip U28 simultaneously parallel resistance R63, one end of resistance R36 and one end of electric capacity C45,2 pin of the other end integrated chip U28 in parallel of resistance R63, the base stage of the other end of resistance R36 and electric capacity C45 connecting triode Q3 simultaneously, the grounded emitter of triode Q3, one end of parallel resistance R76 and resistance R79 while of collector, the other end of resistance R76 connects 3.3V direct supply, and the other end of resistance R79 connects 25 pin of above-mentioned single-chip microcomputer U14.
Integrated chip U24 and peripheral circuit thereof form the shelf depreciation range-adjusting module in above-mentioned cable local discharge detecting unit, and the amplitude for the local discharge signal exported by local discharge sensor reduces; Integrated amplification chip U11, U9 and U7 and external circuit thereof form the local discharge signal filtration module in above-mentioned cable Partial Discharge Detection unit, carry out filtering process to local discharge signal; Integrated chip U28 and external circuit thereof form the local discharge signal comparison module in above-mentioned cable Partial Discharge Detection unit, triode Q3 model is 9018, form above-mentioned local discharge signal Shaping Module, the amplitude of the waveform of local discharge signal is shaped as 3.3V by 5V, 3.3V signal is delivered in single-chip microcomputer U14.
As shown in figure 21, it is that the integrated amplifier chip U4(of LM358 comprises integrated amplifier chip U4A ~ U4B that above-mentioned insulation current acquisition module comprises model) and integrated amplifier chip U6(comprise integrated amplifier chip U6A ~ U6B), model is the integrated chip U16 of UAF42AU, model is 6N137 optocoupler U20 and model be the integrated chip U25 ~ U26 of LM360.Connection terminal J2 is for accessing the original insulation current signal of insulating signal mutual inductor input, first original insulation current signal amplifies through the amplifying circuit of integrated amplifier chip U4A and resistance R19 ~ R20, resistance R39 ~ R40 composition, then the bandpass filter formed through integrated chip U16 carries out filtering, obtains the insulation current signal of comparatively pure 22Hz.
Output terminal 1 pin of integrated amplifier chip U4A is connected with 3 pin of integrated chip U16,5 pin of integrated chip U16,12 pin ground connection, 4 pin resistance in series RQ2 ground connection, and the 8 pin potentiometer PR5 and resistance RF4 that connects successively connects 16 pin.10 pin and 11 pin of integrated chip U16 are connected-5V direct supply and+5V direct supply respectively, and 10 pin shunt capacitance C68 ~ C69 ground connection simultaneously of integrated chip U16,11 pin are shunt capacitance C77 ~ C78 ground connection simultaneously.14 pin of integrated chip U16 successively resistance in series R41 are connected 9 pin with potentiometer PR6, are parallel with resistance R2 between 13 pin and 14 pin simultaneously.
The insulation current signal of the output terminal 8 pin output of integrated chip U16 is first through the range-adjusting circuit of integrated amplification chip U4B composition, the amplitude signal being insulation current from the signal of the output terminal 7 pin leading-out terminal F1 of integrated amplifier chip U4B, terminal F1 extraction is connected to above-mentioned amplitude collection handover module.Signal through integrated amplifier chip U4B output passes through the two-stage amplifying circuit be made up of integrated amplifier chip U6A ~ U6B simultaneously and carries out signal amplification, first optocoupler U20 is sent into through twice amplifying signal, signal carries out waveform reversion through NOT gate chip U15A after optocoupler U20 exports, and the signal after reversion sends into 2 pin of integrated chip U25 successively after resistance in series R52 and resistance R7.
3 pin one end of parallel resistance R51 and the anode of diode D8 simultaneously of integrated chip U25, the other end of resistance R51 connects+5V direct supply, the other end ground connection of diode D8.By electric capacity C23 ground connection while the 4 pin connection-5V direct supplys of integrated chip U25, by electric capacity C24 ground connection while the 8 pin connection+5V direct supplys of integrated chip U25, between 7 pin of integrated chip U25 and 2 pin, be parallel with resistance R65 simultaneously.Integrated chip U25 and resistance R51 ~ R52, resistance R65, electric capacity C23 ~ C24 and diode D8 form first order high speed shaping circuit, insulation current signal enters and forms second level high speed shaping circuit by integrated chip U26 and resistance R53 ~ R54, resistance R68, electric capacity C25 ~ C26 and diode D9 and carry out the shaping of secondary high speed after first order high speed shaping circuit carries out shaping, and the square-wave signal X1 obtaining standard after secondary reshaping is exported by output terminal 7 pin of integrated chip U26 as the phase data of insulation current.
It can thus be appreciated that, integrated amplifier chip U4A and accessory circuit form above-mentioned insulation current comparator circuit, integrated chip U16 and accessory circuit thereof form above-mentioned insulation current bandwidth-limited circuit, and integrated amplifier chip U4B and accessory circuit thereof form above-mentioned insulation current follow circuit.The two-stage amplifying circuit that integrated amplifier chip U6A ~ U6B forms is above-mentioned insulation current secondary comparator circuit, optocoupler 20 and NOT gate chip U15A form above-mentioned insulation current shaping circuit, and the two-stage high speed circuit that integrated chip U25 ~ U26 forms is above-mentioned insulation current high speed comparator circuit.
As shown in figure 22, it is that the integrated amplifier chip U10(of LM358 comprises integrated amplifier chip U10A ~ U10B that above-mentioned insulation voltage acquisition module comprises model), model is the integrated chip U17 of UAF42AU, model is 6N137 optocoupler U23 and model be the integrated chip U27 of LM360.Connection terminal J10 is for accessing the original insulation voltage signal of insulating signal mutual inductor input, and the bandpass filter that first original insulation voltage signal forms through integrated chip U17 carries out filtering, obtains the insulation voltage signal of comparatively pure 22Hz.
1 pin of connection terminal J10 is connected with 3 pin of integrated chip U17,5 pin of integrated chip U17,12 pin ground connection, 4 pin resistance in series RQ3 ground connection, and the 8 pin potentiometer PR7 and resistance RF4 that connects successively connects 16 pin.10 pin and 11 pin of integrated chip U17 are connected-5V direct supply and+5V direct supply respectively, and 10 pin shunt capacitance C70 ~ C71 ground connection simultaneously of integrated chip U17,11 pin are shunt capacitance C79 ~ C80 ground connection simultaneously.14 pin of integrated chip U17 successively resistance in series RF5 are connected 9 pin with potentiometer PR8, are parallel with resistance R3 between 13 pin and 14 pin simultaneously.
The insulation voltage signal of the output terminal 8 pin output of integrated chip U17 passes through the two-stage amplifying circuit be made up of integrated amplifier chip U10A ~ U10B successively and carries out signal amplification, first optocoupler U23 is sent into through twice amplifying signal, from the output terminal leading-out terminal F2 of integrated amplifier chip U10A, terminal F2 is for drawing the amplitude data of insulation voltage signal.The base stage of signal connecting triode Q2 after optocoupler U23 exports.The grounded emitter of triode Q2.The collector of triode Q2 in parallel and 2 pin of integrated chip U27 while of after+5V direct supply resistance in series R59.
3 pin one end of parallel resistance R60 and the anode of diode D10 simultaneously of integrated chip U27, the other end of resistance R60 connects+5V direct supply, the other end ground connection of diode D10.By electric capacity C40 ground connection while the 4 pin connection-5V direct supplys of integrated chip U27, by electric capacity C43 ground connection while the 8 pin connection+5V direct supplys of integrated chip U25, between 7 pin of integrated chip U27 and 2 pin, be parallel with resistance R87 simultaneously.The square-wave signal X2 of the 7 pin outputting standards of integrated chip U25 is as the phase data of insulation voltage.
It can thus be appreciated that, integrated chip U17 and accessory circuit thereof form above-mentioned insulation voltage bandwidth-limited circuit, integrated amplifier chip U10A and accessory circuit thereof form above-mentioned insulation voltage follow circuit, integrated amplifier chip U10B and accessory circuit thereof form above-mentioned insulation voltage comparator circuit, the insulation current shaping circuit that optocoupler 23 is above-mentioned, triode Q2 is above-mentioned insulation voltage range of decrease circuit, and integrated chip U27 forms above-mentioned insulation voltage high speed comparator circuit.
As shown in figure 23, it is that the integrated amplifier chip U8(of LM358 comprises integrated amplifier chip U8A ~ U8B that above-mentioned zero-sequence current acquisition module comprises model), the optocoupler U21 of model to be the integrated chip U18 of UAF42AU and model be 6N137.Connection terminal J4 is for connecting the secondary side of zero sequence current mutual inductor, and access zero sequence current signal, the bandpass filter that first zero sequence current signal forms through integrated chip U18 carries out filtering, obtains the zero sequence current signal of comparatively pure 50Hz.
1 pin of connection terminal J4 is connected with 3 pin of integrated chip U18,5 pin of integrated chip U18,12 pin ground connection, 4 pin resistance in series RQ4 ground connection, and the 8 pin potentiometer PR3 and resistance RF7 that connects successively connects 16 pin.10 pin and 11 pin of integrated chip U18 are connected-5V direct supply and+5V direct supply respectively, and 10 pin shunt capacitance C72 ~ C73 ground connection simultaneously of integrated chip U18,11 pin are shunt capacitance C81 ~ C82 ground connection simultaneously.14 pin of integrated chip U18 successively resistance in series RF3 are connected 9 pin with potentiometer PR4, are parallel with resistance R4 between 13 pin and 14 pin simultaneously.
First the zero sequence current signal that output terminal 8 pin of integrated chip U18 exports passes through the follow circuit be made up of integrated amplifier chip U8A, the output terminal leading-out terminal F3 of integrated amplifier chip U8A, the amplitude data of being drawn zero sequence current signal by terminal F3 delivers to amplitude collection handover module.Enter the amplifying circuit be made up of integrated amplifier chip U10B after the output terminal 1 pin resistance in series R34 of integrated amplifier chip U8 and carry out signal amplification, send into optocoupler U23 through amplifying signal, the signal X3 that optocoupler U23 exports is that the phase signal of zero-sequence current exports.
It can thus be appreciated that, integrated chip U18 and accessory circuit thereof form above-mentioned zero-sequence current bandwidth-limited circuit, integrated amplifier chip U8A and accessory circuit thereof form above-mentioned zero-sequence current follow circuit, integrated amplifier chip U10B and accessory circuit thereof form above-mentioned zero sequence current signal comparator circuit, and optocoupler 23 is above-mentioned zero-sequence current shaping circuit.
As shown in figure 24, above-mentioned residual voltage acquisition module comprises above-mentioned zero-sequence current acquisition module and comprises the integrated chip U1 that integrated amplifier chip U3 that model is LM358 and model are UAF42AU.Connection terminal J1 is for connecting the secondary side of zero sequential potential transformer, and access residual voltage signal, the bandpass filter that first residual voltage signal forms through integrated chip U1 carries out filtering, obtains the zero sequence current signal of comparatively pure 50Hz.
1 pin of connection terminal J1 is connected with 3 pin of integrated chip U18,5 pin of integrated chip U1,12 pin ground connection, 4 pin resistance in series RQ1 ground connection, and the 8 pin potentiometer PR2 and resistance RF2 that connects successively connects 16 pin.10 pin and 11 pin of integrated chip U1 are connected-5V direct supply and+5V direct supply respectively, and 10 pin shunt capacitance C66 ~ C67 ground connection simultaneously of integrated chip U1,11 pin are shunt capacitance C75 ~ C76 ground connection simultaneously.14 pin of integrated chip U1 successively resistance in series RF1 are connected 9 pin with potentiometer PR1, are parallel with resistance R1 between 13 pin and 14 pin simultaneously.
The residual voltage signal that output terminal 8 pin of integrated chip U18 exports passes through the follow circuit be made up of integrated amplifier chip U3, the output terminal leading-out terminal F4 of integrated amplifier chip U3, is drawn the amplitude data of residual voltage signal by terminal F4.It can thus be appreciated that integrated chip U1 and accessory circuit thereof form above-mentioned residual voltage bandwidth-limited circuit, and integrated amplifier chip U3 and accessory circuit thereof form above-mentioned residual voltage.
As shown in figure 25, above-mentioned amplitude gathers handover module and RMS conversion module and is realized by the integrated chip U5 of model to be the integrated chip U31 of CD4051 and model be AD637 respectively.The signal that above-mentioned terminal F1 draws is 13 pin that the amplitude data of insulation current is connected to integrated chip U31; The signal that above-mentioned terminal F2 draws is 14 pin that the amplitude data of insulation voltage is connected to integrated chip U31; The signal that above-mentioned terminal F3 draws is 15 pin that the amplitude data of zero-sequence current is connected to integrated chip U31; The signal that terminal F4 draws is 12 pin that the amplitude data of residual voltage is connected to integrated chip U31.Integrated chip U31 plays the effect of change-over switch, according to the presetting time interval, above-mentioned four groups of amplitude data circulations can be exported, the signal exported is delivered in integrated chip U5 through output terminal 3 pin of integrated chip U31, and 11 pin of integrated chip U31 and 10 pin are connected to 52 pin, 53 pin of single-chip microcomputer U14 respectively.
The data that integrated chip U31 exports deliver to 13 pin of integrated chip U5,3 ~ 4 pin ground connection of integrated chip U5 through electric capacity C96,6 pin, by electric capacity C95 ground connection, are parallel with electric capacity C11 between 8 pin of integrated chip U5,9 pin, are parallel with potentiometer R84 between 6 pin and 9 pin.10 pin and 11 pin of integrated chip U5 are connected-5V direct supply and+5V direct supply respectively, and 10 pin shunt capacitance C97 ~ C98 ground connection simultaneously of integrated chip U5,11 pin are shunt capacitance C37 ~ C38 ground connection simultaneously.14 pin of integrated chip U5 connect 1 pin of integrated chip U13 in above-mentioned AD conversion unit by resistance R5.
As shown in figure 26, the two-way NOR gate circuit in above-mentioned phase acquisition processing unit is realized by XOR gate chip U29A ~ U29B, and the phase data X1 of above-mentioned insulation current and the phase data X2 of insulation voltage accesses two input ends of XOR gate chip U29A respectively.The phase data X3 of above-mentioned zero-sequence current and model are two input ends that a standard block signal that the integrated chip U22 of 6N137 is formed together accesses XOR gate chip U29B.
The base stage of output terminal parallel resistance R55 and the electric capacity C44 access simultaneously triode Q1 of XOR gate chip U29A, the grounded emitter of triode Q1, one end of parallel resistance R75 and resistance R78 while of collector, the other end of resistance R75 connects 3.3V direct supply, the other end of resistance R78 connects 13 pin of integrated chip U32, integrated chip U32 model is CD4051, is above-mentioned phase acquisition handover module.
The base stage of output terminal parallel resistance R62 and the electric capacity C46 access simultaneously triode Q4 of XOR gate chip U29B, the grounded emitter of triode Q4, one end of parallel resistance R88 and resistance R89 while of collector, the other end of resistance R88 connects 3.3V direct supply, and the other end of resistance R89 connects 14 pin of integrated chip U32.
Integrated chip U32 plays the effect of change-over switch equally, the circulation of two groups of phase data can be exported according to the presetting time interval, the signal of output delivers to 23 pin and 67 pin of single-chip microcomputer U14 after parallel resistance R30 and resistance R31 respectively respectively through output terminal 3 pin of integrated chip U32.11 pin of integrated chip U32 and 10 pin are connected to 81 pin, 82 pin of single-chip microcomputer U14 respectively.
The above is only preferred embodiment of the present invention, and be not restriction the present invention being made to other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the Equivalent embodiments of equivalent variations.But everyly do not depart from technical solution of the present invention content, any simple modification, equivalent variations and the remodeling done above embodiment according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.
Claims (10)
1. cable status on-line monitoring warning data integrated processing terminal, it is characterized in that: be provided with a shell, be fixed with control circuit in the enclosure, control circuit is connected with monitored cable, and control circuit at least comprises:
Cable splice temperature measuring unit, for carrying out Real-Time Monitoring to the connector temperature of monitored cable;
Cable local discharge detecting unit, monitors the shelf depreciation situation of cable;
Cable insulation on-line monitoring unit, for carrying out on-line real time monitoring to the state of insulation of cable;
And CPU (central processing unit), for receiving, processing the data of above-mentioned each unit monitoring.
2. cable status on-line monitoring warning data integrated processing terminal according to claim 1, it is characterized in that: described cable insulation on-line monitoring unit comprises data acquisition end and data processing end, described data acquisition end comprises: zero sequence signal acquisition module and insulating signal acquisition module, and described data processing end comprises amplitude acquisition processing module and phase acquisition processing module;
Zero sequence signal acquisition module is connected with amplitude acquisition processing module with insulating signal acquisition module, and amplitude acquisition processing module is connected with CPU (central processing unit);
Zero sequence signal acquisition module is connected with phase acquisition processing module with insulating signal acquisition module simultaneously, and phase acquisition processing module is connected with CPU (central processing unit).
3. cable status on-line monitoring warning data integrated processing terminal according to claim 2, is characterized in that: described zero sequence signal acquisition module, comprising:
Zero-sequence current acquisition module, its input end 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 and delivering to amplitude acquisition processing module and phase acquisition processing module respectively;
Residual voltage acquisition module, its input end is connected with the secondary side of zero sequential potential transformer in cable, for collecting residual voltage amplitude data and delivering to amplitude acquisition processing module;
Described insulating signal acquisition module, comprising:
Insulation current acquisition module, its input end is connected with the secondary side of insulating signal mutual inductor, for collecting insulation current amplitude data and insulation current phase data and delivering to amplitude acquisition processing module and phase acquisition processing module respectively;
Insulation voltage acquisition module, its input end is connected with the secondary side of insulating signal mutual inductor, for collecting insulation voltage amplitude data and insulation voltage phase data and delivering to amplitude acquisition processing module and phase acquisition processing module respectively.
4. cable status on-line monitoring warning data integrated processing terminal according to claim 3, is characterized in that: described zero-sequence current acquisition module comprises the zero-sequence current bandpass filter, zero-sequence current follow circuit, zero sequence current signal comparator circuit and the zero-sequence current waveform shaping circuit that are connected successively;
Zero sequence current mutual inductor described in zero-sequence current bandpass filter input end connects, zero-sequence current waveform shaping circuit output terminal is drawn zero-sequence current phase data and is connected with phase acquisition processing module, and zero-sequence current follow circuit output terminal is drawn zero-sequence current amplitude data simultaneously and is connected with amplitude acquisition processing module.
5. cable status on-line monitoring warning data integrated processing terminal according to claim 3, is characterized in that: described insulation voltage acquisition module comprises the insulation voltage bandwidth-limited circuit, insulation voltage follow circuit, insulation voltage comparator circuit, insulation voltage shaping circuit, insulation voltage range of decrease circuit and the insulation voltage high speed comparator circuit that are connected successively;
Insulation voltage bandwidth-limited circuit is connected with insulating signal mutual inductor, the output terminal of insulation voltage high speed comparator circuit is drawn insulation voltage phase data and is connected with phase acquisition processing module, draws insulation voltage amplitude data be simultaneously connected with amplitude acquisition processing module from the output terminal of insulation voltage follower circuit.
6. cable status on-line monitoring warning data integrated processing terminal according to claim 3, is characterized in that: described insulation current acquisition module comprises the insulation current comparator circuit, insulation current bandwidth-limited circuit, insulation current follow circuit, insulation current secondary comparator circuit, insulation current shaping circuit and the insulation current high speed comparator circuit that are connected successively;
Insulation current comparator circuit is connected with insulating signal mutual inductor, the output terminal of insulation current high speed comparator circuit is drawn insulation current phase data and is connected with phase acquisition processing module, draws insulation current amplitude data be simultaneously connected with amplitude acquisition processing module from the output terminal of insulation current follower circuit.
7. cable status on-line monitoring warning data integrated processing terminal according to claim 3, it is characterized in that: described zero-sequence current acquisition module comprises residual voltage bandwidth-limited circuit and residual voltage follow circuit, residual voltage bandwidth-limited circuit is connected with zero sequential potential transformer, and residual voltage follow circuit output terminal is drawn residual voltage amplitude data and is connected with amplitude acquisition processing module.
8. the cable status on-line monitoring warning data integrated processing terminal according to any one of claim 2 ~ 7, is characterized in that: described amplitude acquisition processing module comprises:
Amplitude gathers handover module, for receiving and switch zero-sequence current amplitude data, residual voltage amplitude data, insulation current amplitude data, the insulation voltage amplitude data of output cable;
RMS conversion module, its input end and amplitude gather handover module output terminal and are connected, and gather the data of handover module output for changing amplitude;
Analog-to-digital conversion module, its input end connects RMS conversion module output terminal, and its output terminal connects CPU (central processing unit).
9. the cable status on-line monitoring warning data integrated processing terminal according to any one of claim 2 ~ 6, is characterized in that: described phase acquisition processing module comprises:
Two groups of NOR gate circuits: two groups of input ends receive insulation current phase data and insulation voltage phase data, zero-sequence current phase data and road sign quasi-square wave data respectively;
Phase acquisition handover module, its input end accesses the output terminal of two groups of NOR gate circuits respectively, and its output terminal connects CPU (central processing unit).
10. the cable status on-line monitoring warning data integrated processing terminal according to claim 3 or 5 or 6, it is characterized in that: described insulating signal mutual inductor comprises a core body adopting foam and golden material to make, and the two groups of coils be wrapped on this core body, wherein one group of coil is connected between cable screening wire and earth terminal, and another group coil connects insulation current acquisition module and insulation voltage acquisition module and the voltage injection device for injecting 22Hz voltage signal to screen layer.
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Address after: 430000 South Taizi Lake innovation Valley tus Xiexin science and Technology Innovation Park, Wuhan Economic and Technological Development Zone, Wuhan City, Hubei Province (qdxx-f2401) Patentee after: Wuhan Yixun Electric Technology Co.,Ltd. Address before: 257000 No. a7-7, floor 7, Zhongguancun Science and Technology City, No. 1, Beixi Sixth Road, Zhangdian District, Zibo City, Shandong Province Patentee before: SHANDONG YIXUN ELECTRIC CO.,LTD. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20231123 Address after: 430000, Room 1710, Building 9, Dream City, No. 9 Hongtu 1st Road, Jiangjun Road Street Office, Wuhan City, Hubei Province Patentee after: Hubei Zhongyuan Chutong Technology Co.,Ltd. Address before: 430000 South Taizi Lake innovation Valley tus Xiexin science and Technology Innovation Park, Wuhan Economic and Technological Development Zone, Wuhan City, Hubei Province (qdxx-f2401) Patentee before: Wuhan Yixun Electric Technology Co.,Ltd. |