CN104215883A - Power transmission line fault detection device - Google Patents
Power transmission line fault detection device Download PDFInfo
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- CN104215883A CN104215883A CN201410464742.XA CN201410464742A CN104215883A CN 104215883 A CN104215883 A CN 104215883A CN 201410464742 A CN201410464742 A CN 201410464742A CN 104215883 A CN104215883 A CN 104215883A
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Abstract
The invention discloses a power transmission line fault detection device, and relates to the field of power transmission line detection. A current sensor transmits an acquired current signal to a signal modulation and demodulation circuit, and a voltage sensor transmits an acquired voltage signal to the signal modulation and demodulation circuit; the signal modulation and demodulation circuit respectively receives the current signal and the voltage signal, and performs filtering treatment on the current signal and the voltage signal to filter away interference signals; the signal modulation and demodulation circuit electrically transmits the filtered current signal and voltage signal to a micro-controller; the micro-controller receives the filtered current signal and voltage signal, respectively compares the filtered current signal and voltage signal with a pre-set current signal and a pre-set voltage signal both stored inside, and outputs a fault current signal and a fault voltage signal to an outer terminal device; the outer terminal device after obtaining the fault current signal and the fault voltage signal determines a fault line position and sends an alarm. The power transmission line fault detection device can detect a fault line in time, improves the maintenance efficiency of the fault line, and avoids unnecessary economic loss.
Description
Technical field
The present invention relates to power system transmission line field of fault detection, particularly a kind of failure detection device for power transmission line.
Background technology
Transmission of electricity is after boosting with the electric energy that generator sends by transformer, then realizes through opertaing device access transmission lines of electricity such as isolating switchs.By version, transmission line of electricity is divided into overhead transmission line and cable line.The formation such as overhead transmission line route overhead line structures, wire, insulator, line hardware, bracing wire, pole and tower foundation, earthing device, is erected on ground.According to the character of conveying electric current, transmission of electricity is divided into ac transmission and direct current transportation.The eighties in 19th century first successfully achieves direct current transportation.But the voltage due to direct current transportation is difficult to continue to improve under technical conditions at that time, so that ability to transmit electricity and benefit are restricted.In 19 end of the centurys, direct current transportation is progressively by ac transmission is replaced.The success of ac transmission, has welcome the New Times of 20th century electrified society.
The basic process of transmission of electricity creates conditions electromagnetic energy is transmitted along the direction of transmission line of electricity.Multi-line power transmission ability is subject to the domination of the various rules of electromagnetic field and circuit.With ground potential (zero potential) as a reference point, line wire is called transmission voltage under all needing to be in the high voltage applied by power supply.
Transmission line of electricity is determined maximum delivery power after considering technology, the every factor of economic dispatch, is called the transmission capacity of this circuit.Transmission capacity substantially to square being directly proportional of transmission voltage.Therefore, improving transmission voltage is the technical way realizing Large Copacity or long distance power transmission, is also the outstanding feature of technology of transmission of electricity development level.
Transmission line of electricity inspection mainly relies on operation maintenance personnel periodically to make an inspection tour, though energy discovering device hidden danger, but due to the limitation of itself, lack the detection to particular surroundings and weather, the change of line corridor external force can not be grasped in time in the tour vacuum phase in cycle, very easily before next one tour is not arrived, owing to lacking monitoring, line accident occur.Therefore, failure detection device for power transmission line monitoring and measuring application and giving birth to, by the monitoring to each actual parameter of circuit, can improve the management level to transmission line of electricity safety and economic operation, and provides necessary reference for the repair based on condition of component work of transmission line of electricity.
Inventor finds at least there is following shortcoming and defect in prior art in actual applications:
In the failure detection device for power transmission line of reality, due to fault current or voltage little, and the interference of weather conditions, is difficult to detect in time fault in time, creates unnecessary economic loss.
Summary of the invention
The invention provides a kind of failure detection device for power transmission line, present invention achieves and the fault of transmission line of electricity is detected, improve maintenance efficiency, avoid unnecessary economic loss, described below:
A kind of failure detection device for power transmission line, comprising: microcontroller, described failure detection device for power transmission line also comprises: current sensor, voltage sensor, modulating and demodulating signal circuit and terminal device,
Described current sensor and described voltage sensor are arranged on shaft tower respectively, and described signal conditioning circuit is electrically connected with described microcontroller, and described microcontroller connects described terminal device by wired or wireless mode;
Current signal on a certain transmission line of electricity of described current sensor Real-time Collection, voltage signal on a certain transmission line of electricity of described voltage sensor Real-time Collection, the current signal that described current sensor will collect, the voltage signal collected is transferred to described modulating and demodulating signal circuit by described voltage sensor respectively;
Described modulating and demodulating signal circuit is received current signal and voltage signal respectively, and carries out filtering process to described current signal and described voltage signal, filters out undesired signal; Described modulating and demodulating signal circuit is by the current signal after filtration and voltage signal electrical transmission extremely described microcontroller;
Described microcontroller receives the current signal after described filtration and voltage signal, and contrasts respectively with the predetermined current signal and voltage signal that are stored in inside, exports fault-current signal and failure voltage signal extremely described exterior terminal equipment;
Described exterior terminal equipment is determined faulty line position, is sent warning after obtaining described fault-current signal and described voltage signal.
Described microcontroller comprises: single-chip microcomputer,
Described single-chip microcomputer is connected with described modulating and demodulating signal circuit by the first signal wire, and described single-chip microcomputer is connected with described exterior terminal equipment by secondary signal line; Described secondary signal line adopts wired or wireless communication modes.
During described secondary signal line employing wire communication mode, be specially RS485 communication modes or RS232 communication modes.
When described secondary signal line adopts wireless communication mode, be specially infrared, bluetooth or WIFI communication mode.
The model of described single-chip microcomputer is 89C2051A.
Described current sensor is: Hall current sensor or Rogowski current sensor.
Described voltage sensor is Hall voltage sensor.
Described exterior terminal equipment is specially: PC, panel computer etc.
The present invention has following beneficial effect: the present invention is by current sensor, voltage sensor collection signal, and through the process of modulating and demodulating signal circuit, filtered current signal and voltage signal are transferred to microcontroller, microcontroller with preset signal contrast after, fault-signal is transferred to exterior terminal equipment, exterior terminal equipment sends warning, and staff keeps in repair timely.The present invention can detect faulty line timely, and keeps in repair faulty line, improves the maintenance efficiency of faulty line, avoids unnecessary economic loss.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of failure detection device for power transmission line provided by the invention;
Fig. 2 is the structural representation of microcontroller provided by the invention.
In accompanying drawing, being listed as follows of each parts:
1: microcontroller; 2: current sensor;
3: voltage sensor; 4: modulating and demodulating signal circuit;
5: terminal device; 11: single-chip microcomputer;
A: the first signal wire; B: secondary signal line.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
In order to realize detecting the fault of transmission line of electricity, improve maintenance efficiency, avoid unnecessary economic loss, embodiments provide a kind of failure detection device for power transmission line, see Fig. 1, this failure detection device for power transmission line comprises: microcontroller 1, current sensor 2, voltage sensor 3, modulating and demodulating signal circuit 4 and terminal device 5
Current sensor 2 and voltage sensor 3 are arranged on shaft tower respectively, and signal conditioning circuit 4 is electrically connected with microcontroller 1, and microcontroller 1 connects terminal device 5 by wired or wireless mode.
Current signal on a certain transmission line of electricity of current sensor 2 Real-time Collection, voltage signal on a certain transmission line of electricity of voltage sensor 3 Real-time Collection, the current signal that current sensor 2 will collect, the voltage signal collected is transferred to modulating and demodulating signal circuit 4 by voltage sensor 3 respectively; Modulating and demodulating signal circuit 4 is received current signal and voltage signal respectively, and carries out filtering process to current signal and voltage signal, filters out undesired signal; Modulating and demodulating signal circuit 4 by filter after current signal and voltage signal electrical transmission to microcontroller 1, current signal after microcontroller 1 receiving filtration and voltage signal, and contrast respectively with the predetermined current signal and voltage signal that are stored in inside, output fault-current signal and failure voltage signal are to exterior terminal equipment 5; After exterior terminal equipment 5 obtains fault-current signal and voltage signal, determine faulty line position, send warning.
Wherein, current sensor 2 is different according to measuring principle, mainly can be divided into: shunt, electromagnetic current transducer, electronic current mutual inductor etc.Electronic current mutual inductor comprises: Hall current sensor, Rogowski current sensor etc.
Current sensor 2 in the embodiment of the present invention is preferably Hall current sensor, and hall principle current sensor is based on Hall magnetic balance principle (closed loop) and Hall direct measuring type (open loop) two kinds of ultimate principles.The principle of open-loop current sensor: the magnetic flux that primary current IP produces is gathered in magnetic circuit by high-quality magnetic core, Hall element is fixed in very little air gap, linearity test is carried out to magnetic flux, the Hall voltage that hall device exports is after special circuit process, what secondary output was consistent with former side wave shape follows output voltage, and this voltage accurately can reflect the change of primary current.Hall current sensor can measure various types of electric current, from direct current to the alternating current of tens KHz, and the principle of work mainly Hall effect of its foundation.
Wherein, voltage sensor 3 points of direct current voltage sensors and AC voltage sensor, AC voltage sensor is the instrument that tested alternating current (alternating voltage) can be converted to linearly ratio output DC voltage or DC current by one, is widely used in the electric device of the departments such as electric power, post and telecommunications, oil, coal, metallurgy, railway, municipal administration, automatically control and dispatching system.AC voltage sensor has single channel, three tunnel unitized construction forms.Direct current voltage sensor is that a kind of linearly ratio that tested DC voltage can be converted to exports the instrument of DC voltage or DC current, and each needs electricity to isolate the industry of observing and controlling to be also widely used in electric power, remote monitoring, instrument and meter, Medical Devices, industrial automatic control etc.
Voltage sensor 3 in the embodiment of the present invention is preferably Hall voltage sensor, by original edge voltage by external or built-in resistor, by current limit at 10mA, this electric current is after multicircuit winding, the magnetic field produced by primary current through poly-magnetic material is detected by the Hall element in air gap, and induce corresponding electromotive force, this electromotive force feeds back to compensating coil and then compensation after the regulation of electrical circuit, the magnetic flux that this compensating coil produces and the magnetic flux equal and opposite in direction that primary current (tested voltage is produced by current-limiting resistance) produces, direction is contrary, thus in magnetic core, keep magnetic flux to be zero.What in fact Hall voltage sensor utilized is the technology the same with magnetic balance closed-loop Hall current sensor, i.e. Zero flux Hall current sensor.
Wherein, the filtering circuit in modulating and demodulating signal circuit 4 has passive filtering and the large class of active power filtering two.If filtering circuit element is only made up of passive element (resistance, electric capacity, inductance), be then called passive filter circuit.The principal mode of passive filtering has capacitor filtering, inductor filter and compound filtering (comprising inverted L shape, LC filtering, LC π type filtering and the filtering of RC π type etc.).If filtering circuit is not only by passive element, is also made up of active component (ambipolar pipe, monopole type pipe, integrated transporting discharging), is then called active filter circuit.The principal mode of active power filtering is Active RC filtering, is also referred to as electronic filter.The model of the embodiment of the present invention to filtering circuit does not limit.
See Fig. 2, microcontroller 1 comprises: single-chip microcomputer 11, and single-chip microcomputer 11 is connected with modulating and demodulating signal circuit 4 by the first signal wire A, and single-chip microcomputer 12 is connected with exterior terminal equipment 5 by secondary signal line B; Secondary signal line adopts wired or wireless communication modes.
When secondary signal line adopts wire communication mode, can be RS485 communication modes, the model of RS485 telecommunication circuit be preferably MAX3443EAPA.Or,
When secondary signal line adopts wire communication mode, it can be RS232 communication modes.
Separately, when secondary signal line adopts wireless communication mode, it can be the communication mode such as infrared, bluetooth or WIFI.
The model of the preferred single-chip microcomputer 11 of the embodiment of the present invention is 89C2051A.
During specific implementation, exterior terminal equipment 5 can be: PC, panel computer etc.The embodiment of the present invention does not limit this.
When exterior terminal equipment 5 sends warning according to the fault-signal got, staff can get power transmission line position corresponding to fault-signal according to the blue print of reality, fault is removed, keeps in repair, avoid further economic loss, remove potential safety hazard.
In sum, embodiments provide a kind of failure detection device for power transmission line, the present invention by faulty line being detected, and keeps in repair faulty line, improves the maintenance efficiency of faulty line, avoids unnecessary economic loss.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a failure detection device for power transmission line, comprising: microcontroller, it is characterized in that, described failure detection device for power transmission line also comprises: current sensor, voltage sensor, modulating and demodulating signal circuit and terminal device,
Described current sensor and described voltage sensor are arranged on shaft tower respectively, and described signal conditioning circuit is electrically connected with described microcontroller, and described microcontroller connects described terminal device by wired or wireless mode;
Current signal on a certain transmission line of electricity of described current sensor Real-time Collection, voltage signal on a certain transmission line of electricity of described voltage sensor Real-time Collection, the current signal that described current sensor will collect, the voltage signal collected is transferred to described modulating and demodulating signal circuit by described voltage sensor respectively;
Described modulating and demodulating signal circuit is received current signal and voltage signal respectively, and carries out filtering process to described current signal and described voltage signal, filters out undesired signal; Described modulating and demodulating signal circuit is by the current signal after filtration and voltage signal electrical transmission extremely described microcontroller;
Described microcontroller receives the current signal after described filtration and voltage signal, and contrasts respectively with the predetermined current signal and voltage signal that are stored in inside, exports fault-current signal and failure voltage signal extremely described exterior terminal equipment;
Described exterior terminal equipment is determined faulty line position, is sent warning after obtaining described fault-current signal and described voltage signal.
2. a kind of failure detection device for power transmission line according to claim 1, is characterized in that, described microcontroller comprises: single-chip microcomputer,
Described single-chip microcomputer is connected with described modulating and demodulating signal circuit by the first signal wire, and described single-chip microcomputer is connected with described exterior terminal equipment by secondary signal line; Described secondary signal line adopts wired or wireless communication modes.
3. a kind of failure detection device for power transmission line according to claim 2, is characterized in that, during described secondary signal line employing wire communication mode, is specially RS485 communication modes or RS232 communication modes.
4. a kind of failure detection device for power transmission line according to claim 2, is characterized in that, when described secondary signal line adopts wireless communication mode, is specially infrared, bluetooth or WIFI communication mode.
5. a kind of failure detection device for power transmission line according to claim 2, is characterized in that, the model of described single-chip microcomputer is 89C2051A.
6. a kind of failure detection device for power transmission line according to claim 1, is characterized in that, described current sensor is: Hall current sensor or Rogowski current sensor.
7. a kind of failure detection device for power transmission line according to claim 1, is characterized in that, described voltage sensor is Hall voltage sensor.
8. a kind of failure detection device for power transmission line according to claim arbitrary in claim 1 to 7, is characterized in that, described exterior terminal equipment is specially: PC, panel computer etc.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410464742.XA CN104215883A (en) | 2014-09-12 | 2014-09-12 | Power transmission line fault detection device |
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| CN201410464742.XA CN104215883A (en) | 2014-09-12 | 2014-09-12 | Power transmission line fault detection device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104991220A (en) * | 2015-07-06 | 2015-10-21 | 国网天津市电力公司 | Three-phase multi-functional calibration instrument with remote interaction function |
| CN105571643A (en) * | 2016-01-18 | 2016-05-11 | 云南电网有限责任公司电力科学研究院 | Integrated general monitoring system for power transmission line |
| CN106443327A (en) * | 2016-08-31 | 2017-02-22 | 国网山东省电力公司曹县供电公司 | Power transmission line fault detection apparatus |
| CN106950461A (en) * | 2017-05-08 | 2017-07-14 | 北京善思物联科技有限公司 | Non-Destructive Testing formula power monitoring equipment, system and method |
| CN108956862A (en) * | 2017-05-18 | 2018-12-07 | 罗伯特·博世有限公司 | The method of the appearance of open-circuit line in the sensor for identification |
-
2014
- 2014-09-12 CN CN201410464742.XA patent/CN104215883A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104991220A (en) * | 2015-07-06 | 2015-10-21 | 国网天津市电力公司 | Three-phase multi-functional calibration instrument with remote interaction function |
| CN105571643A (en) * | 2016-01-18 | 2016-05-11 | 云南电网有限责任公司电力科学研究院 | Integrated general monitoring system for power transmission line |
| CN105571643B (en) * | 2016-01-18 | 2018-03-23 | 云南电网有限责任公司电力科学研究院 | A kind of general monitoring system of transmission line of electricity integration |
| CN106443327A (en) * | 2016-08-31 | 2017-02-22 | 国网山东省电力公司曹县供电公司 | Power transmission line fault detection apparatus |
| CN106950461A (en) * | 2017-05-08 | 2017-07-14 | 北京善思物联科技有限公司 | Non-Destructive Testing formula power monitoring equipment, system and method |
| CN108956862A (en) * | 2017-05-18 | 2018-12-07 | 罗伯特·博世有限公司 | The method of the appearance of open-circuit line in the sensor for identification |
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Address after: 300010 Tianjin city Hebei District Wujing Road No. 39 Applicant after: State Grid Corporation of China Applicant after: STATE GRID TIANJIN BAODI POWER SUPPLY CO., LTD. Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant before: State Grid Corporation of China Applicant before: STATE GRID TIANJIN BAODI POWER SUPPLY CO., LTD. |
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Application publication date: 20141217 |