CN104808115A - Split acquisition terminal for recognition of low-voltage faulted cables - Google Patents
Split acquisition terminal for recognition of low-voltage faulted cables Download PDFInfo
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- CN104808115A CN104808115A CN201510230803.0A CN201510230803A CN104808115A CN 104808115 A CN104808115 A CN 104808115A CN 201510230803 A CN201510230803 A CN 201510230803A CN 104808115 A CN104808115 A CN 104808115A
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- phase current
- acquisition terminal
- communication device
- low voltage
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Abstract
The invention discloses a split acquisition terminal for recognition of low-voltage faulted cables. The split acquisition terminal comprises a single-chip microcomputer, three split core type current transformers, a three-phase current detection chip, a wireless communication device, a power source and a clock circuit. The three split core type current transformers are used for acquiring data of three-phase current on a three-phase cable correspondingly; the three-phase current detection chip is connected with the three split core type current transformers and used for reading the data of the three-phase current on the three-phase cable; the wireless communication device is used for sending the data of the three-phase current on the three-phase cable. The three-phase current detection chip, the wireless communication device, the power source and the clock circuit are all connected with the single-chip microcomputer. The split acquisition terminal for recognition of the low-voltage faulted cables has the advantages that real-time monitoring of low-voltage cable equipment can be realized, remote wireless transmission of fault or overload signals of the three-phase cables is realized, and real-time clocking is realized as well; testing the cables one by one is avoided, and accordingly emergency maintenance time is saved.
Description
Technical field
The present invention relates to a kind of separate type low voltage failure cable identification acquisition terminal in power grid maintenance field.
Background technology
When run into cannot determine which bar cable is failure cable, current way is tested one by one the outlet cable in upper level power supply low tension switch to the inlet wire cable and feeder pillar of feeder pillar, delay a large amount of emergency repair time, have the expanded scope of long period to have a power failure simultaneously.
At present, in the O&M of low-voltage cable, after normal generation low pressure feeder pillar outlet cable fault, fuse is not jumped and the phenomenon of upper level power supply low-side switch tripping, repair personnel needs cable one by one to do test to judge whether fault, thus producing following problem: cable is tested one by one, and the repairing such as at substantial human and material resources resource, increases emergency repair time, only remote measurement primary insulation just needs about 1.5min, remote measurement cable about 9min consuming time; Non-faulting cable need have a power failure simultaneously, and power failure range is large, and customer outage hours is long; If need withstand voltage test be done, then need 5min consuming time, then additionally damage is caused to non-faulting cable, reduce cable serviceable life.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of separate type low voltage failure cable identification acquisition terminal is provided, it can realize monitoring in real time low-voltage cable, realizes the fault of threephase cable or the remote wireless transmission of overload signal and realizes in real time clock; Avoid cable one by one to do experiment, save emergency repair time.
A kind of technical scheme realizing above-mentioned purpose is: a kind of separate type low voltage failure cable identification acquisition terminal, comprise single-chip microcomputer, three split core type current transformers of the every phase current data on threephase cable are obtained for correspondence, be connected with three described split core type current transformers, for reading the three-phase current detection chip of the every phase current data on threephase cable, for sending the radio communication device of the every phase current data on threephase cable, and power supply and clock circuit;
Described three-phase current detection chip, described radio communication device, described power supply is all connected described single-chip microcomputer with described clock circuit.
Further, described single-chip microcomputer is provided with comparer, clocked flip-flop, storer, described comparer connects described storer, and described clocked flip-flop connects described comparer, and described storer connects described three-phase current detection chip and described radio communication device.
Further, described single-chip microcomputer is the MSP430 single-chip microcomputer of Texas Instrument.
Further, the INA293 three-phase current detection chip of described three-phase current detection chip Texas Instrument.
Further, described power supply is lithium battery.
Further, described radio communication device is Bluetooth communication device.
Further, described clock circuit is 555 type clock circuits.
Further, described three-phase current detection chip, described radio communication device, described power supply are all connected described single-chip microcomputer by RS433 bus with described clock circuit.
Have employed the technical scheme of a kind of separate type low voltage failure cable identification acquisition terminal of the present invention, comprise single-chip microcomputer, three split core type current transformers of the every phase current data on threephase cable are obtained for correspondence, be connected with three described split core type current transformers, for reading the three-phase current detection chip of the every phase current data on threephase cable, for sending the radio communication device of the every phase current data on threephase cable, and power supply and clock circuit; Described three-phase current detection chip, described radio communication device, described power supply is all connected described single-chip microcomputer with described clock circuit.Its technique effect is: it can realize the real-time monitoring to low-voltage cable equipment; Realize the fault of threephase cable or the remote wireless transmission of overload signal and realize in real time clock; Avoid cable one by one to do experiment, save emergency repair time.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of separate type low voltage failure cable identification acquisition terminal of the present invention.
Fig. 2 is the schematic diagram of the single-chip microcomputer of a kind of separate type low voltage failure cable identification acquisition terminal of the present invention.
Embodiment
Refer to Fig. 1, the present inventor, in order to understand technical scheme of the present invention better, below by embodiment particularly, and is described in detail by reference to the accompanying drawings:
Refer to Fig. 1, a kind of separate type low voltage failure cable identification acquisition terminal of the present invention for gathering the current data of the every phase in feeder pillar on a threephase cable, and sends it to separate type low voltage failure cable identification handheld terminal.The structural representation of a kind of separate type low voltage failure cable identification acquisition terminal of the present invention is as shown in Figure 1:
A kind of separate type low voltage failure cable identification acquisition terminal of the present invention comprises single-chip microcomputer 1, three split core type current transformers 2 of the every phase current data on threephase cable are obtained for correspondence, be connected with three split core type current transformers 2, for reading the three-phase current detection chip 3 of the every phase current data on threephase cable, for sending the radio communication device 4 of data with handheld terminal to the identification of separate type low voltage failure cable.Three-phase current detection chip 3 is all connected with single-chip microcomputer 1 with radio communication device 4.The effective value of the every phase current on the threephase cable of single-chip microcomputer 1 within the cycle of reading each voltage fluctuation.Simultaneously, the built-in clocked flip-flop 11 of single-chip microcomputer 1, storer 13, comparer 12 and mean operation device 14, storer 13 is for storing the effective value of the every phase current on each threephase cable read of single-chip microcomputer 1, clocked flip-flop 11 timing when the full 10min of its timing resets, and make comparer 12 determine within this time-count cycle, the maximal value of the effective value of the every phase current on threephase cable, and by the maximal value of the effective value of the every phase current on threephase cable write storer 13.Clocked flip-flop 11 also makes mean operation device 14 calculate the mean value of the effective value of the every phase current in this time-count cycle on threephase cable when the full 10min of its timing, the time interval that three-phase current detection chip 3 obtains the instantaneous value of the every phase current on threephase cable is 0.3125ms, the time interval 20ms of the effective value of the every phase current on metering three-phase cable, namely each voltage wave cycle is 20ms, the instantaneous value of the every phase current in each voltage wave cycle on record 64 threephase cables.
On single-chip microcomputer 1, comparer 12 and mean operation device 14 connected storage 13, clocked flip-flop 11 connects comparer 12 and mean operation device 14, and storer 13 connects three-phase current detection chip 3 and radio communication device 4.
In the present embodiment, single-chip microcomputer 1 is the MSP430 series monolithic of Texas Instrument.The INA293 three-phase current detection chip of three-phase current detection chip 3 Texas Instrument.
A kind of separate type low voltage failure cable identification acquisition terminal of the present invention also comprises clock circuit 5 and power supply 6, wherein adopting 555 type clock circuits at clock circuit, keeping synchronous for making a kind of separate type low voltage failure cable identification acquisition terminal of the present invention with the clock of separate type low voltage failure cable identification handheld terminal.Power acquisition capacity is the lithium battery of 6500mAh, and theoretical service time is 10 days.Clock circuit 5 is connected single-chip microcomputer 1 with power supply 6 simultaneously.
A kind of separate type low voltage failure cable identification acquisition terminal of the present invention can monitor the change of every phase current on threephase cable that fault, overload, impact etc. cause completely, namely in 10 minutes for the impact of maximal value of effective value of phase current every on threephase cable and the mean value of the effective value of every phase current, and by radio communication device 4, feedback separate type low voltage failure cable identification handheld terminal, reads for maintenance personal.
Separate type low voltage failure cable identification handheld terminal reads data time less than 1min, adds that repair personnel consults data time, judges that the overall time of a threephase cable whether fault is no more than 2min.And the test mode that tradition is insulated by remote measurement, judge a threephase cable whether fault need the time of about 10min.By a kind of separate type low voltage failure cable identification acquisition terminal of the present invention, fault determining time can be shortened to original 20%.
The radio communication device 4 of a kind of separate type low voltage failure cable identification acquisition terminal of the present invention, at existing communication, as in infrared, bluetooth, CDMA, GSM network and wifi etc., selection Bluetooth wireless communication is the result of the factors such as comprehensive environment for use, ease for operation, cost, power consumption and volume.The signal that Bluetooth communication device sends can penetrate different material, and adopts Frequency Hopping Spread Spectrum, strong interference immunity.Radio communication device 4 can arrange unique DCH, the collection of identification and information is carried out for separate type low voltage failure cable identification handheld terminal, thus can realize transmitting information well in topographic features complex environment, reduce the quantity of the separate type low voltage failure cable identification handheld terminal that repair personnel carries, and improve repairing speed.
Radio communication device 4, adopt SAW (Surface Acoustic Wave) resonator frequency stabilization, frequency stability is high, when environment temperature changes between-25 ~+85 DEG C, frequently wafts and is only 3ppm/ DEG C.Radio communication device 4 adopts ASK (amplitude shift keying) mode to carry out frequency modulation (PFM), and to reduce power consumption, when radio communication device 4 stops sending data, its electric current reduces to zero.The operating voltage range of radio communication device 4 is 3 ~ 12V, and when change in voltage, the transmission frequency of radio communication device 4 is substantially constant, and room environmental monitoring by experiment, under spacious environment, the signal of this radio communication device 4 accepts distance and is about about 100m.In the present embodiment, the centre frequency that radio communication device 4 is launched is 433MHz.Three-phase current detection chip 3, radio communication device 4 power supply 6 are all connected single-chip microcomputer 1 by RS433 bus with clock circuit 6.
Those of ordinary skill in the art will be appreciated that, above embodiment is only used to the present invention is described, and be not used as limitation of the invention, as long as in spirit of the present invention, all will drop in Claims scope of the present invention the change of the above embodiment, modification.
Claims (8)
1. a separate type low voltage failure cable identification acquisition terminal, comprises single-chip microcomputer, it is characterized in that:
It also comprises: three split core type current transformers obtaining the every phase current data on threephase cable for correspondence, be connected with three described split core type current transformers, for reading the three-phase current detection chip of the every phase current data on threephase cable, for sending the radio communication device of the every phase current data on threephase cable, and power supply and clock circuit;
Described three-phase current detection chip, described radio communication device, described power supply is all connected described single-chip microcomputer with described clock circuit.
2. a kind of separate type low voltage failure cable identification acquisition terminal according to claim 1, it is characterized in that: described single-chip microcomputer is provided with comparer, clocked flip-flop, storer and mean operation device, described comparer is connected described storer with described mean operation device, described clocked flip-flop connects described comparer and described mean operation device, and described storer connects described three-phase current detection chip and described radio communication device.
3. a kind of separate type low voltage failure cable identification acquisition terminal according to claim 2, is characterized in that: described single-chip microcomputer is the MSP430 single-chip microcomputer of Texas Instrument.
4. a kind of separate type low voltage failure cable identification acquisition terminal according to claim 1, is characterized in that: the INA293 three-phase current detection chip of described three-phase current detection chip Texas Instrument.
5. a kind of separate type low voltage failure cable identification acquisition terminal according to claim 1, is characterized in that: described power supply is lithium battery.
6. a kind of separate type low voltage failure cable identification acquisition terminal according to claim 1, is characterized in that: described radio communication device is Bluetooth communication device.
7. a kind of separate type low voltage failure cable identification acquisition terminal according to claim 1, is characterized in that: described clock circuit is 555 type clock circuits.
8. a kind of separate type low voltage failure cable identification acquisition terminal according to claim 1, is characterized in that: described three-phase current detection chip, described radio communication device, described power supply are all connected described single-chip microcomputer by RS433 bus with described clock circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510230803.0A CN104808115A (en) | 2015-05-08 | 2015-05-08 | Split acquisition terminal for recognition of low-voltage faulted cables |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510230803.0A CN104808115A (en) | 2015-05-08 | 2015-05-08 | Split acquisition terminal for recognition of low-voltage faulted cables |
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| CN104808115A true CN104808115A (en) | 2015-07-29 |
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| CN201510230803.0A Pending CN104808115A (en) | 2015-05-08 | 2015-05-08 | Split acquisition terminal for recognition of low-voltage faulted cables |
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| CN109490605A (en) * | 2018-09-21 | 2019-03-19 | 国网浙江台州市黄岩区供电有限公司 | Branch's wiretap and building head case current synchronization calibration equipment and method of calibration with handheld terminal |
| CN109738757A (en) * | 2019-01-04 | 2019-05-10 | 深圳摩通电气有限公司 | Acquisition terminal is used in a kind of identification of separate type low voltage failure cable |
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Application publication date: 20150729 |