CN205193152U - City cable run ground connection circulation on -line monitoring device - Google Patents
City cable run ground connection circulation on -line monitoring device Download PDFInfo
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- CN205193152U CN205193152U CN201520967193.8U CN201520967193U CN205193152U CN 205193152 U CN205193152 U CN 205193152U CN 201520967193 U CN201520967193 U CN 201520967193U CN 205193152 U CN205193152 U CN 205193152U
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Abstract
City cable run ground connection circulation on -line monitoring device belongs to cable online monitoring technology field, especially relates to a city cable run ground connection circulation on -line monitoring device. The utility model provides an efficient, power supply makes things convenient for, job stabilization's city cable run ground connection circulation on -line monitoring device. The utility model discloses an electric current collection module, signal analysis calculation module, wireless communication module and power module, its structural feature cable earth current signal is connected with electric current collection module, electric current collection module and signal analysis calculation module are connected, signal analysis calculation module and wireless communication module are connected, power module is electric current collection module, signal analysis calculation module, wireless communication module power supply, electric current collection module includes A phase electric current acquisition circuit, B phase electric current acquisition circuit, C phase electric current acquisition circuit, N phase electric current acquisition circuit and adc.
Description
Technical field
The utility model belongs to on-line monitoring of cable technical field, particularly relates to a kind of city cable line-to-ground circulation on-Line Monitor Device.
Background technology
Along with the fast development of national economy, the application of power cable is more and more extensive, and in the city that some are larger, high-tension cable is laid in the cable tunnel of underground on a large scale, bears the task of urban electric power conveying.But in the application process of reality, the failure rate of high-tension cable is but higher all the time, in order to address this problem, guarantees that cable security stably runs, State Grid Corporation of China requires monthly to carry out one-shot measurement to the grounding circulation of cable.Because city cable is laid in the cable tunnel of underground mostly, and lay distance, earth point is many, makes surveying work abnormal arduous and loaded down with trivial details, brings huge burden to Yun Jian unit.
Summary of the invention
The utility model is exactly for the problems referred to above, provides that a kind of efficiency is high, power supply is convenient, the city cable line-to-ground circulation on-Line Monitor Device of working stability.
For achieving the above object, the utility model adopts following technical scheme, and the utility model comprises current acquisition module, signal analysis computing module, wireless communication module and power module, its structural feature cable grounding current signal and current acquisition model calling; Current acquisition module is connected with signal analysis computing module; Signal analysis computing module is connected with wireless communication module; Power module is current acquisition module, signal analysis computing module, wireless communication module power supply.
Described current acquisition module comprises A phase current Acquisition Circuit, B phase current Acquisition Circuit, C phase current Acquisition Circuit, N phase current Acquisition Circuit and analog to digital converter, the output port of A phase current Acquisition Circuit, the output port of B phase current Acquisition Circuit, the output port of C phase current Acquisition Circuit, the output port of N phase current Acquisition Circuit is connected with the input port of described analog to digital converter respectively, A phase current Acquisition Circuit, B phase current Acquisition Circuit, C phase current Acquisition Circuit, N phase current Acquisition Circuit includes current transformer, protection circuit and operational amplifier, current transformer is connected with protection circuit, protection circuit is connected with operational amplifier.
Described signal analysis computing module comprises memory circuit, watchdog circuit, real time clock circuit, processor, and memory circuit, watchdog circuit, real time clock circuit are connected with processor respectively.
Described wireless communication module comprises wireless communication controller, scrambler, impact damper, modulator and antenna; Wireless communication controller is connected with scrambler; Scrambler is connected with impact damper; Impact damper is connected with modulator; Modulator is connected with antenna.
Described power module comprises gets energy mutual inductor, front end circuit, current rectifying and wave filtering circuit, electric power management circuit, DC voltage changer, charge management circuit and accumulator; Get and can be connected with front end circuit by mutual inductor; Front end circuit is connected with current rectifying and wave filtering circuit; Current rectifying and wave filtering circuit is connected with electric power management circuit; Electric power management circuit is connected with DC voltage changer and charge management circuit respectively; Charge management circuit is connected with accumulator; Accumulator is connected with DC voltage changer.
As a kind of preferred version, current transformer described in the utility model is KHCT-200A/100MA opening current transformer, described operational amplifier is OP07DP programmable operational amplifier, described analog to digital converter is AD7606 analog to digital converter, and described processor circuit selects Cortex-M3 core processor; Described wireless communication module adopts 433MHz radio communication.
As another kind of preferred version, protection circuit described in the utility model and operational amplifier comprise duodiode BAT54SV1, 1 pin of V1 is connected with-5V, 2 pin of V1 are connected with 5V, 3 pin of V1 respectively with current transformer output terminal, TVS diode T2 one end, 5 resistance R20 one end, Europe, resistance R15 one end, 1K Europe is connected, the T2 other end respectively with ground wire, the R20 other end, resistance R22 one end, 1.5K Europe is connected, the R22 other end respectively with 2 pin of duodiode BAT54SV5, 1 pin of V5, 3 pin of amplifier OP07DPU11 are connected, 2 pin of U11 respectively with 3 pin of V5, the R15 other end, 4.02 resistance R1 one end, Europe are connected, the R1 other end respectively with 6 pin of U11, the input port of analog to digital converter is connected.
In addition, processor described in the utility model adopts LPC1768 chip U4,22 pin of U4 are connected with 2 pin of 12M crystal oscillator Y1,22pF electric capacity C15 one end respectively, and the C15 other end is connected with ground wire, 22pF electric capacity C16 one end respectively, and the C16 other end is connected with 1 pin of Y1,23 pin of U4 respectively.
The utility model beneficial effect.
The utility model adopts electromagnetic induction to get energy and wireless communication technology, is equipped with accurate Acquisition Circuit, has easy installation, non-maintaining, safe, stable feature, greatly can improve the monitoring efficiency of cable grounding circulation, reduces and patrols and examines workload.
The utility model is applicable to the on-line monitoring of the city cable grounding circulation of each electric pressure.
The utility model has the functions such as data acquisition, the storage of data this locality and remote radio communication, and the mode adopting electromagnetic induction to get energy is powered.
The utility model can obtain electric energy from high-tension cable induction by mutual inductor by getting, and when high-tension cable electric power is sufficient, gets and can directly to monitoring device energy supply, and can charge a battery by mutual inductor; When electric power is not enough or without electricity, accumulator is that monitoring device is powered, thus achieves as monitoring device continues, powers incessantly.The power supply mode that electromagnetic induction gets energy effectively overcomes in cable tunnel the difficult problem not having outfit standard light current power supply, achieves again the electrical isolation of monitoring device and forceful electric power circuit, improves the anti-electromagnetic interference capability of device.
The utility model, by amplifier, analog to digital converter, achieves the precise acquisition of signal.
The utility model can realize telemonitoring and failure prediction; Accelerate judgement speed and the precision of city cable earth fault; Decrease monitoring expense, alleviate the work load of monitoring personnel.The utility model city cable line-to-ground circulation on-Line Monitor Device has larger economic benefit and social effect.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described further.The utility model protection domain is not only confined to the statement of following content.
Fig. 1 is one-piece construction block diagram of the present utility model.
Fig. 2 is current acquisition modular structure block diagram of the present utility model.
Fig. 3 is signal analysis computing module structured flowchart of the present utility model.
Fig. 4 is wireless communication module structured flowchart of the present utility model.
Fig. 5 is power module structure block diagram of the present utility model.
Fig. 6 is protection circuit of the present utility model and operation amplifier circuit schematic diagram.
Fig. 7,8 is processor partial schematic diagram of the present utility model.
In Fig. 1-5; current acquisition module 1; signal analysis computing module 2; wireless communication module 3; power module 4; current transformer 5; protection circuit 6; operational amplifier 7; analog to digital converter 8, memory circuit 9, watchdog circuit 10; real time clock circuit 11, processor 12, wireless communication controller 13, scrambler 14, impact damper 15, modulator 16, antenna 17, getting can mutual inductor 18, front end circuit 19, current rectifying and wave filtering circuit 20, electric power management circuit 21, DC voltage changer 22, charge management circuit 23, accumulator 24.
Embodiment
As shown in the figure, the utility model comprises current acquisition module, signal analysis computing module, wireless communication module and power module, cable grounding current signal and current acquisition model calling; Current acquisition module is connected with signal analysis computing module; Signal analysis computing module is connected with wireless communication module; Power module is current acquisition module, signal analysis computing module, wireless communication module power supply.
Described current acquisition module comprises A phase current Acquisition Circuit, B phase current Acquisition Circuit, C phase current Acquisition Circuit, N phase current Acquisition Circuit and analog to digital converter, the output port of A phase current Acquisition Circuit, the output port of B phase current Acquisition Circuit, the output port of C phase current Acquisition Circuit, the output port of N phase current Acquisition Circuit is connected with the input port of described analog to digital converter respectively, A phase current Acquisition Circuit, B phase current Acquisition Circuit, C phase current Acquisition Circuit, N phase current Acquisition Circuit includes current transformer, protection circuit and operational amplifier, current transformer is connected with protection circuit, protection circuit is connected with operational amplifier.
Described signal analysis computing module comprises memory circuit, watchdog circuit, real time clock circuit, processor, and memory circuit, watchdog circuit, real time clock circuit are connected with processor respectively.
Described wireless communication module comprises wireless communication controller, scrambler, impact damper, modulator and antenna; Wireless communication controller is connected with scrambler; Scrambler is connected with impact damper; Impact damper is connected with modulator; Modulator is connected with antenna.
Described power module comprises gets energy mutual inductor, front end circuit, current rectifying and wave filtering circuit, electric power management circuit, DC voltage changer, charge management circuit and accumulator; Get and can be connected with front end circuit by mutual inductor; Front end circuit is connected with current rectifying and wave filtering circuit; Current rectifying and wave filtering circuit is connected with electric power management circuit; Electric power management circuit is connected with DC voltage changer and charge management circuit respectively; Charge management circuit is connected with accumulator; Accumulator is connected with DC voltage changer.
Described current acquisition module in charge to A, B, C, N tetra-phase ground current signal carry out synchronous acquisition, the result after collection passes to signal analysis computing module; Signal analysis computing module is responsible for calculating data, obtain A, B, C, N tetra-phase ground current amplitude and gather the initial phase in moment, and result of calculation is delivered to wireless communication module; The data wireless received is sent to backstage by wireless communication module.
Described current transformer is KHCT-200A/100MA opening current transformer, and described operational amplifier is OP07DP programmable operational amplifier, and described analog to digital converter is AD7606 analog to digital converter, and described processor circuit selects Cortex-M3 core processor; Described wireless communication module adopts 433MHz radio communication.433MHz radio communication is low in energy consumption, only just can set up wireless link when there being data transmit-receive.433MHz wireless communication frequency is relatively low, electromagnetic diffractive good, can cut-through thing well, is applicable to very much being applied in underground cable tunnel communicating.
OP07DP programmable operational amplifier possesses the feature of Low Drift Temperature, low skew, low noise, can carry out effective filtering to signal and precisely amplify, and conditioned high-quality signal is passed to analog to digital converter.
KHCT-200A/100MA opening current transformer has high linearity, high-precision advantage.
AD7606 analog to digital converter possesses difference, synchronous, low distortion rate, high-resolution feature, multichannel analog signals synchronously can be changed into digital signal, and pass to signal analysis computing module.
Processor circuit selects the high-performance processor of Cortex-M3 kernel, and be applicable to the application of high integration, low-power consumption, processor is by obtaining amplitude and the phase place of four phase ground currents to data analysis and calculation.
Described current transformer is responsible for obtaining cable grounding current signal, and by signal transmission to protection circuit; Protection circuit is responsible for eliminating superpotential and excess current; and by signal transmission to operational amplifier; operational amplifier carries out filtering and amplification to signal; and by conditioned signal transmission to analog to digital converter; multichannel analog signals is synchronously changed into digital signal by analog to digital converter, and passes to signal analysis computing module.
Described memory circuit is used for the data that the configuration parameter of save set and device monitoring arrive; Watchdog circuit is responsible for the running status of monitoring processor, and when processor does not respond, watchdog circuit is to processor reset; Real time clock circuit provides the time; Processor is by obtaining amplitude and the phase place of four phase ground currents to data analysis and calculation.
The package of the complete paired data of described wireless communication controller, addressing, flow control and verification; Scrambler is used for data coding encrypting; Impact damper is used for drive singal; Modulator is used for modulation signal; Antenna is for strengthening signal intensity.
Described getting can obtain electric energy from primary side by mutual inductor, produces induced voltage at secondary side; Front end circuit over-voltage suppression; Current rectifying and wave filtering circuit carries out rectification and filtering to induced voltage, gives electric power management circuit afterwards; Electric power management circuit carries out voltage amplitude adjustment to power supply, output current controls and ripple process, and charge management circuit is to charge in batteries; The DC voltage of the DC voltage that electric power management circuit exports by DC voltage changer or accumulator converts required voltage to.
Described protection circuit and operational amplifier comprise duodiode BAT54SV1, 1 pin of V1 is connected with-5V, 2 pin of V1 are connected with 5V, 3 pin of V1 respectively with current transformer output terminal, TVS diode T2 one end, 5 resistance R20 one end, Europe, resistance R15 one end, 1K Europe is connected, the T2 other end respectively with ground wire, the R20 other end, resistance R22 one end, 1.5K Europe is connected, the R22 other end respectively with 2 pin of duodiode BAT54SV5, 1 pin of V5, 3 pin of amplifier OP07DPU11 are connected, 2 pin of U11 respectively with 3 pin of V5, the R15 other end, 4.02 resistance R1 one end, Europe are connected, the R1 other end respectively with 6 pin of U11, the input port of analog to digital converter is connected.Current signal is by terminals P 3 place in circuit plate, and resistance R20 plays the effect of I/V conversion, converts current signal to voltage signal.Resistance R15, resistance R1 and amplifier U11 constitute inverse proportion amplifying circuit, carry out amplification process to voltage signal.Wherein T2 is transient voltage suppressor, V1 and V2 is schottky diode, and these three devices play the effect of protection amplifier.
Described processor adopts LPC1768 chip U4, and 22 pin of U4 are connected with 2 pin of 12M crystal oscillator Y1,22pF electric capacity C15 one end respectively, and the C15 other end is connected with ground wire, 22pF electric capacity C16 one end respectively, and the C16 other end is connected with 1 pin of Y1,23 pin of U4 respectively.
Be understandable that, above about specific descriptions of the present utility model, the technical scheme described by the utility model embodiment is only not limited to for illustration of the utility model, those of ordinary skill in the art is to be understood that, still can modify to the utility model or equivalent replacement, to reach identical technique effect; Needs are used, all within protection domain of the present utility model as long as meet.
Claims (4)
1. city cable line-to-ground circulation on-Line Monitor Device, comprises current acquisition module, signal analysis computing module, wireless communication module and power module, it is characterized in that cable grounding current signal and current acquisition model calling; Current acquisition module is connected with signal analysis computing module; Signal analysis computing module is connected with wireless communication module; Power module is current acquisition module, signal analysis computing module, wireless communication module power supply;
Described current acquisition module comprises A phase current Acquisition Circuit, B phase current Acquisition Circuit, C phase current Acquisition Circuit, N phase current Acquisition Circuit and analog to digital converter, the output port of A phase current Acquisition Circuit, the output port of B phase current Acquisition Circuit, the output port of C phase current Acquisition Circuit, the output port of N phase current Acquisition Circuit is connected with the input port of described analog to digital converter respectively, A phase current Acquisition Circuit, B phase current Acquisition Circuit, C phase current Acquisition Circuit, N phase current Acquisition Circuit includes current transformer, protection circuit and operational amplifier, current transformer is connected with protection circuit, protection circuit is connected with operational amplifier,
Described signal analysis computing module comprises memory circuit, watchdog circuit, real time clock circuit, processor, and memory circuit, watchdog circuit, real time clock circuit are connected with processor respectively;
Described wireless communication module comprises wireless communication controller, scrambler, impact damper, modulator and antenna; Wireless communication controller is connected with scrambler; Scrambler is connected with impact damper; Impact damper is connected with modulator; Modulator is connected with antenna;
Described power module comprises gets energy mutual inductor, front end circuit, current rectifying and wave filtering circuit, electric power management circuit, DC voltage changer, charge management circuit and accumulator; Get and can be connected with front end circuit by mutual inductor; Front end circuit is connected with current rectifying and wave filtering circuit; Current rectifying and wave filtering circuit is connected with electric power management circuit; Electric power management circuit is connected with DC voltage changer and charge management circuit respectively; Charge management circuit is connected with accumulator; Accumulator is connected with DC voltage changer.
2. city cable line-to-ground circulation on-Line Monitor Device according to claim 1, it is characterized in that described current transformer is KHCT-200A/100MA opening current transformer, described operational amplifier is OP07DP programmable operational amplifier, described analog to digital converter is AD7606 analog to digital converter, and described processor circuit selects Cortex-M3 core processor; Described wireless communication module adopts 433MHz radio communication.
3. city cable line-to-ground circulation on-Line Monitor Device according to claim 1, it is characterized in that described protection circuit and operational amplifier comprise duodiode BAT54SV1, 1 pin of V1 is connected with-5V, 2 pin of V1 are connected with 5V, 3 pin of V1 respectively with current transformer output terminal, TVS diode T2 one end, 5 resistance R20 one end, Europe, resistance R15 one end, 1K Europe is connected, the T2 other end respectively with ground wire, the R20 other end, resistance R22 one end, 1.5K Europe is connected, the R22 other end respectively with 2 pin of duodiode BAT54SV5, 1 pin of V5, 3 pin of amplifier OP07DPU11 are connected, 2 pin of U11 respectively with 3 pin of V5, the R15 other end, 4.02 resistance R1 one end, Europe are connected, the R1 other end respectively with 6 pin of U11, the input port of analog to digital converter is connected.
4. city cable line-to-ground circulation on-Line Monitor Device according to claim 1, it is characterized in that described processor adopts LPC1768 chip U4,22 pin of U4 are connected with 2 pin of 12M crystal oscillator Y1,22pF electric capacity C15 one end respectively, the C15 other end is connected with ground wire, 22pF electric capacity C16 one end respectively, and the C16 other end is connected with 1 pin of Y1,23 pin of U4 respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520967193.8U CN205193152U (en) | 2015-11-30 | 2015-11-30 | City cable run ground connection circulation on -line monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520967193.8U CN205193152U (en) | 2015-11-30 | 2015-11-30 | City cable run ground connection circulation on -line monitoring device |
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| CN205193152U true CN205193152U (en) | 2016-04-27 |
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| CN201520967193.8U Active CN205193152U (en) | 2015-11-30 | 2015-11-30 | City cable run ground connection circulation on -line monitoring device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105842520A (en) * | 2016-05-17 | 2016-08-10 | 国网山东省电力公司青岛供电公司 | Cable grounding circulation monitoring device |
| CN106814243A (en) * | 2015-11-30 | 2017-06-09 | 国网辽宁省电力有限公司沈阳供电公司 | City cable line-to-ground circulation on-Line Monitor Device |
| CN106950458A (en) * | 2017-03-15 | 2017-07-14 | 国家电网公司 | The short circuit of low pressure uniline and disconnection detection device |
-
2015
- 2015-11-30 CN CN201520967193.8U patent/CN205193152U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106814243A (en) * | 2015-11-30 | 2017-06-09 | 国网辽宁省电力有限公司沈阳供电公司 | City cable line-to-ground circulation on-Line Monitor Device |
| CN105842520A (en) * | 2016-05-17 | 2016-08-10 | 国网山东省电力公司青岛供电公司 | Cable grounding circulation monitoring device |
| CN106950458A (en) * | 2017-03-15 | 2017-07-14 | 国家电网公司 | The short circuit of low pressure uniline and disconnection detection device |
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