CN105842520A - Cable grounding circulation monitoring device - Google Patents
Cable grounding circulation monitoring device Download PDFInfo
- Publication number
- CN105842520A CN105842520A CN201610331267.8A CN201610331267A CN105842520A CN 105842520 A CN105842520 A CN 105842520A CN 201610331267 A CN201610331267 A CN 201610331267A CN 105842520 A CN105842520 A CN 105842520A
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- cable
- grounding circulation
- signal
- data acquisition
- monitoring device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/16—Measuring asymmetry of polyphase networks
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The invention provides a cable grounding circulation monitoring device. The device comprises a data acquisition module which is connected with a transmission cable and is used for acquiring the cable grounding circulation state information of the transmission cable and converting the information into an electrical signal, a communication module which is used for transmitting the electrical signal of the grounding circulation state information, and a control device which is used for receiving the electrical signal of the grounding circulation state information and analyzing the electrical signal to acquire the cable grounding circulation state data of the transmission cable. The cable grounding circulation state is monitored online in real time.
Description
Technical field
The present invention relates to electrically monitor field, be specifically related to a kind of cable grounding circulation monitoring device.
Background technology
In China, 110KV and above high voltage electric transmission cable are mainly single-core cable.Single-core cable
Magnetic line of force phase hinge can be produced so that it is two bring out when the cable core of metal sheath and cable is by alternating current
The highest induced voltage.
Having one or more layers metallic shielding structure outside power transmission cable major insulation, this structure is used for shielding electricity
Cable inner conductor electric field.This structure of cable is equivalent to a kind of single-turn transformer: inside cable core
On alternating current will induce the electromotive force of alternation on outside cable metal sheath or copper shield.As
The really equal ground connection in the two ends of cable shield or protective metal shell, then can be formed under the effect of induced electromotive force
Circulation, circulation value is directly proportional to factors such as ground return circuit resistance to core load current size, screen layer.
Bigger grounding circulation is when flowing through earth point (equivalent resistance), and ground connection position will generate heat, on fire,
And then destruction major insulation, cause cable insulation to puncture, cause line tripping.If cable of copper shield or
Protective metal shell one or both ends are unsettled, and at this moment its circulation value will be the least, but cable shield and metal protect
The oversheath of set free end will bear induced voltage, this magnitude of voltage and core load current and cable over the ground
The factors such as shielding, protective metal shell length are directly proportional.When cable is longer and load is bigger, metal sheath
On will induce high voltage.As metal sheath overvoltage limiter earial drainage can not be passed through, then may
Cable jacket punctures, and causes multiple spot metallic shield grounding, forms circulation, and then develops into fault very
To expanding as cable passage fire.
For preventing from producing on cable shield and protective metal shell circulation or overvoltage, regulatory requirements cable shield
Layer and protective metal shell need at one end be directly grounded, and one end is through overvoltage limiter ground connection.
Operating cable jacket is rotten because of contingent mechanical damage and the chemistry that is likely to occur
Erosion, the plague of rats make cable jacket multiple spot damage, and guard box water inlet, overvoltage protection device puncture, metal
Sheath earth connection disconnection etc. causes metallic shield grounding mode to change.Cable metal sheath ground connection side
After formula occurs extremely, the numerical value of shield circulating current will occur to change accordingly.As can not be at discovery in time
Reason, it will cause cable on fire, insulation breakdown, there is grid power blackout accident.Therefore, by gathering
It is the most normal that the earth current of cable metal sheath grasps earthing mode state in time, the most necessary.
The way maked an inspection tour by conventional manual, the data of collection in worksite cable grounding circulation, waste time and energy,
And the cycle of tour is longer, it is impossible to monitor in real time.
Existing cable grounding circulation monitoring terminal can only be single measurement every phase cable metal sheath ground connection
Current absolute value, and three-phase ground current unbalance factor, earth current and load current ratio cannot be judged
Etc. multinomial data target, do not possesses multi-parameter comparative analysis function horizontal, longitudinal.
From antitheft angle, existing earth current monitoring terminal, can be by the method surveying earth current
Indirectly judge whether grounding copper bar or earth connection are cut, and cannot rise when cable has a power failure or overhauls
To anti-theft monitoring function.
Therefore, how to realize real time on-line monitoring cable grounding circulation state and become problem demanding prompt solution.
Summary of the invention
The technical problem to be solved in the present invention is to realize real time on-line monitoring cable grounding circulation state.
To this end, according to first aspect, the embodiment of the invention discloses a kind of cable grounding circulation monitoring dress
Put, including:
Data acquisition module, is used for being connected to power transmission cable, connects for gathering the cable of power transmission cable
Ground circulation status information is also converted to the signal of telecommunication；Communication module, is used for sending grounding circulation status information
The signal of telecommunication；Controller, is transmitted electricity for the signal of telecommunication parsing receiving grounding circulation status information
The cable grounding circulation status data of cable.
Preferably, data acquisition module includes: multiple sensors, is used for being respectively connecting to power transmission cable
On, gather the status information that the cable grounding circulation of power transmission cable is different respectively；Data acquisition unit, uses
In receiving the different status information that multiple sensor gathers respectively, and it is respectively converted into each state letter
The signal of telecommunication that breath is corresponding.
Preferably, multiple sensors include: current transformer, for being arranged on the metal of power transmission cable
On the earth connection of sheath, for gathering the earth current signal of metal sheath；Shock sensor, is used for
It is arranged on the joint of power transmission cable, for gathering the positional information of joint.
Preferably, this cable grounding circulation monitoring device also includes: audible-visual annunciator, with data acquisition
Device connects, output alarm signal under the warning pumping signal in data acquisition unit output；Multiple biographies
Sensor also includes: obliquity sensor, is arranged on earth connection or the protective wire of power transmission cable, is used for
After earth connection blocks triggering, send for characterizing touching of output warning pumping signal to data acquisition unit
Signal.
Preferably, audible-visual annunciator is arranged on cable grounding one end of power transmission cable.
Preferably, audible-visual annunciator is additionally operable to the report that response data collector exports under control of the controller
Alert triggering signal output alarm signal.
Preferably, communication module is wireless communication module.
Preferably, this cable grounding circulation monitoring device also includes: display module, with data acquisition unit
Connect, for showing different status informations in visual mode.
Technical solution of the present invention, has the advantage that
The cable grounding circulation monitoring device that the embodiment of the present invention provides is permissible by data acquisition module
Gather the cable grounding circulation status information of power transmission cable and be converted to the signal of telecommunication, it is possible to by communication
Module sends the signal of telecommunication of grounding circulation status information, utilizes controller to receive this signal of telecommunication of parsing and obtains
The cable grounding circulation status data of power transmission cable.It is achieved thereby that real time on-line monitoring cable grounding ring
Stream mode.
As preferred technical scheme, data acquisition module includes multiple sensor such that it is able in real time
Monitor multinomial data target.
As preferred technical scheme, the warning pumping signal that audible-visual annunciator exports at data acquisition unit
Lower output alarm signal such that it is able to realize when three-phase imbalance or earth current exception, it is possible to
Effectively feed back this abnormal information.
Accompanying drawing explanation
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, under
The accompanying drawing used required in detailed description of the invention or description of the prior art will be briefly described by face,
It should be evident that the accompanying drawing in describing below is some embodiments of the present invention, general for this area
From the point of view of logical technical staff, on the premise of not paying creative work, it is also possible to obtain according to these accompanying drawings
Obtain other accompanying drawing.
Fig. 1 is a kind of cable grounding circulation monitoring device structural representation in the embodiment of the present invention；
Fig. 2 is a kind of structural representation sketch of data acquisition unit in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is clearly and completely described, it is clear that
Described embodiment is a part of embodiment of the present invention rather than whole embodiments.Based on this
Embodiment in bright, those of ordinary skill in the art are obtained under not making creative work premise
Every other embodiment, broadly fall into the scope of protection of the invention.
As long as additionally, technical characteristic involved in invention described below difference embodiment that
The conflict of not constituting between this just can be combined with each other.
In order to realize real time on-line monitoring cable grounding circulation state, present embodiment discloses a kind of cable
Grounding circulation monitoring device, refer to Fig. 1, for this cable grounding circulation monitoring device structural representation,
This device includes: data acquisition module 1, communication module 2 and controller 3, wherein:
Data acquisition module 1 is used for being connected to power transmission cable, connects for gathering the cable of power transmission cable
Ground circulation status information is also converted to the signal of telecommunication.In a particular embodiment, can be according to power transmission cable
Monitoring requirements determines cable grounding circulation Status Type, such as three-phase ground current unbalance factor, connects
Earth-current and the data targets such as load current ratio.In a preferred embodiment, data acquisition module 1 wraps
Include: multiple sensors, be used for being respectively connecting to power transmission cable, gather the cable of power transmission cable respectively
The status information that grounding circulation is different；Data acquisition unit 11 is for receiving what multiple sensor gathered respectively
Different status informations, and it is respectively converted into the signal of telecommunication that each status information is corresponding.The most real
Executing in example, the plurality of sensor may include that current transformer 12 and shock sensor 13, wherein,
Current transformer 12, for being arranged on the earth connection of the metal sheath of power transmission cable, is used for gathering metal
The earth current signal of sheath；Shock sensor 13, for being arranged on the joint of power transmission cable, is used for
Gather the positional information of joint, cable connector can be characterized whether by because wound is hit by this positional information
And the dislocation produced.
Communication module 2 is for sending the signal of telecommunication of grounding circulation status information.In a preferred embodiment,
Communication module 2 can be wireless communication module based on internet, preferably GSM/GPRS communication mould
Block.When wireless communication module is GSM/GPRS communication module, it is possible not only to be grounded circulation shape
The data interaction of state information, it is also possible to send this information by the way of GSM message.
Controller 3 obtains power transmission cable for the signal of telecommunication parsing receiving grounding circulation status information
Cable grounding circulation status data.The circulation status data received by this controller 3 can be calculated
Go out the ability of three-phase ground current unbalance factor, earth current and the multinomial data targets such as load current ratio.
In a particular embodiment, this controller 3 can be arranged on Surveillance center, specifically, can individually set
Put controller 3, it is also possible to using the monitoring host computer of Surveillance center as controller 3.
In order to monitor whether cable is maliciously stolen, in a preferred embodiment, this cable grounding circulation
Monitoring device can further include: audible-visual annunciator 4 and obliquity sensor 14, wherein, and acousto-optic
Alarm 4 is connected with data acquisition unit 11, for the warning excitation letter in data acquisition unit 11 output
Number lower output alarm signal, this alarm signal can be sound, light or combination.Inclination angle passes
Sensor 14 is arranged on earth connection or the protective wire of power transmission cable, is used for after earth connection blocks triggering,
The triggering signal for characterizing output warning pumping signal is sent to data acquisition unit 11, so that sound
Light crossing-signal 4 output alarm signal.In a preferred embodiment, this audible-visual annunciator 4 can be arranged
In cable grounding one end of power transmission cable, can the most outwardly send alarm signal.
In a preferred embodiment, audible-visual annunciator 4 is additionally operable to response data collector 11 at controller
3 warnings controlling lower output trigger signal output alarm signal.Specifically, controller 3 can control number
Reporting to the police according to collector 11 output and trigger signal, audible-visual annunciator 4 responds this warning and triggers signal output report
Alert signal.Thus, it is achieved that when Surveillance center monitors suspicious data, it is possible to Remote triggering acousto-optic
Alarm 4 is reported to the police.
In a preferred embodiment, this cable grounding circulation monitoring device also includes display module 5, display
Module 5 is connected with data acquisition unit 11, for showing different status informations in visual mode.
Refer to Fig. 2, for a kind of structural representation sketch of data acquisition unit 11, in a particular embodiment,
This data acquisition unit 11 includes: microprocessor 111, this microprocessor 111 can be such as single-chip microcomputer,
DSP etc. have the chip of logical operation function, and microprocessor 111 is for realizing the control of data interaction
And data operation；This data acquisition unit 11 may further include as required: electric current translation interface 112,
In AI interface 113, DI interface 114, DO interface 115, serial port module 116 and SPI interface 117
Any one or more, wherein, current sensor is by electric current translation interface and microprocessor 111
Connecting, obliquity sensor 14 can be connected with microprocessor 111 by AI interface 113, and vibrations pass
Sensor 13 can be connected with microprocessor 111 by DI interface 114, and audible-visual annunciator 4 can lead to
Crossing DO interface 115 to be connected with microprocessor 111, LCDs 5 can pass through SPI interface 117
Being connected with this microprocessor 111, communication module 2 is connected with microprocessor by serial port module 116.
Cable grounding circulation monitoring device disclosed in the present embodiment, can be gathered by data acquisition module
The cable grounding circulation status information of power transmission cable is also converted to the signal of telecommunication, it is possible to pass through communication module
Send the signal of telecommunication of grounding circulation status information, utilize controller to receive this signal of telecommunication of parsing and transmitted electricity
The cable grounding circulation status data of cable.It is achieved thereby that real time on-line monitoring cable grounding circulation shape
State.Then, solving the collection of cable grounding circulation manually, data are the most inaccurate
Problem, it is achieved that the monitoring in real time of cable grounding circulating data, real-time judge three-phase ground electric current injustice
Weighing apparatus degree, earth current and the multinomial data targets such as load current ratio.Possesses locally displayed function convenient
Tour personnel's real time inspection；Possess sound and light alarm, when three-phase imbalance or earth current exception,
Locally, remotely send warning.After earth connection or protective wire are cut by malice robber, can incite somebody to action the very first time
Information is sent.
In a preferred embodiment, data acquisition module includes multiple sensor such that it is able to supervise in real time
Survey multinomial data target.
In a preferred embodiment, audible-visual annunciator is under the warning pumping signal that data acquisition unit exports
Output alarm signal such that it is able to realize when three-phase imbalance or earth current exception, it is possible to have
Effect ground feeds back this abnormal information.
Obviously, above-described embodiment is only for clearly demonstrating example, and not to embodiment party
The restriction of formula.For those of ordinary skill in the field, the most also may be used
To make other changes in different forms.Here without also all of embodiment being given
With exhaustive.And the obvious change thus extended out or variation are still in the guarantor of the invention
Protect among scope.
Claims (8)
1. a cable grounding circulation monitoring device, it is characterised in that including:
Data acquisition module, is used for being connected to power transmission cable, for gathering the electricity of described power transmission cable
Cable grounding circulation status information is also converted to the signal of telecommunication；
Communication module, for sending the signal of telecommunication of described grounding circulation status information；
Controller, obtains described defeated for the signal of telecommunication parsing receiving described grounding circulation status information
The cable grounding circulation status data of electrical cables.
2. cable grounding circulation monitoring device as claimed in claim 1, it is characterised in that described
Data acquisition module includes:
Multiple sensors, are used for being respectively connecting to described power transmission cable, gather described transmission of electricity electricity respectively
The status information that the cable grounding circulation of cable is different；
Data acquisition unit, for receiving the different status information that the plurality of sensor gathers respectively,
And it is respectively converted into the signal of telecommunication that each status information is corresponding.
3. cable grounding circulation monitoring device as claimed in claim 2, it is characterised in that described
Multiple sensors include:
Current transformer, for being arranged on the earth connection of the metal sheath of described power transmission cable, is used for
Gather the earth current signal of described metal sheath；
Shock sensor, for being arranged on the joint of described power transmission cable, is used for gathering described joint
Positional information.
4. cable grounding circulation monitoring device as claimed in claim 2 or claim 3, it is characterised in that
Also include:
Audible-visual annunciator, is connected with described data acquisition unit, for export at described data acquisition unit
Output alarm signal under warning pumping signal；
The plurality of sensor also includes:
Obliquity sensor, is arranged on earth connection or the protective wire of described power transmission cable, for connecing
After ground wire blocks triggering, send to described data acquisition unit and be used for characterizing the described warning pumping signal of output
Triggering signal.
5. cable grounding circulation monitoring device as claimed in claim 4, it is characterised in that described
Audible-visual annunciator is arranged on cable grounding one end of described power transmission cable.
6. cable grounding circulation monitoring device as claimed in claim 4, it is characterised in that described
Audible-visual annunciator is additionally operable to respond the warning of output under described controller controls of described data acquisition unit and touches
Signalling output alarm signal.
7. the cable grounding circulation monitoring device as described in claim 1-3 any one, its feature exists
In, described communication module is wireless communication module.
8. cable grounding circulation monitoring device as claimed in claim 2 or claim 3, it is characterised in that
Also include:
Display module, is connected with described data acquisition unit, for visual mode show described in not
Same status information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610331267.8A CN105842520A (en) | 2016-05-17 | 2016-05-17 | Cable grounding circulation monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610331267.8A CN105842520A (en) | 2016-05-17 | 2016-05-17 | Cable grounding circulation monitoring device |
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| CN105842520A true CN105842520A (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610331267.8A Pending CN105842520A (en) | 2016-05-17 | 2016-05-17 | Cable grounding circulation monitoring device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907726A (en) * | 2017-10-13 | 2018-04-13 | 国网山东省电力公司济南供电公司 | A kind of detection device and method of tunnel cable grounding circulation |
| CN108169536A (en) * | 2017-12-18 | 2018-06-15 | 国网山东省电力公司济南供电公司 | The cable tunnel grounding circulation monitoring device and method of a kind of wide-range high-precision |
| CN108957114A (en) * | 2018-08-22 | 2018-12-07 | 沈阳工业大学 | A kind of the on-line monitoring experimental rig and method of grounding circulation |
| CN109035659A (en) * | 2018-08-27 | 2018-12-18 | 许继集团有限公司 | A kind of high voltage power cable anti-theft monitoring method and device |
| CN109375028A (en) * | 2018-08-27 | 2019-02-22 | 许继集团有限公司 | A kind of broken string recognition methods of high voltage power cable circulating current sensor and device |
| CN110095698A (en) * | 2019-06-18 | 2019-08-06 | 山东钢铁股份有限公司 | A kind of metallic shield grounding monitoring system and method for single-core cable |
| CN110940886A (en) * | 2018-09-25 | 2020-03-31 | 长沙理工大学 | 110kV cross-connection cable fault diagnosis method based on differential current analysis |
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| CN205749648U (en) * | 2016-05-17 | 2016-11-30 | 国网山东省电力公司青岛供电公司 | Cable grounding circulation monitoring device |
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| CN102620770A (en) * | 2012-03-19 | 2012-08-01 | 上海市电力公司 | Small-sized high-voltage cable state monitoring device |
| CN102944812A (en) * | 2012-11-11 | 2013-02-27 | 国家电网公司 | Cable operation fault monitoring device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907726A (en) * | 2017-10-13 | 2018-04-13 | 国网山东省电力公司济南供电公司 | A kind of detection device and method of tunnel cable grounding circulation |
| CN108169536A (en) * | 2017-12-18 | 2018-06-15 | 国网山东省电力公司济南供电公司 | The cable tunnel grounding circulation monitoring device and method of a kind of wide-range high-precision |
| CN108957114A (en) * | 2018-08-22 | 2018-12-07 | 沈阳工业大学 | A kind of the on-line monitoring experimental rig and method of grounding circulation |
| CN109035659A (en) * | 2018-08-27 | 2018-12-18 | 许继集团有限公司 | A kind of high voltage power cable anti-theft monitoring method and device |
| CN109375028A (en) * | 2018-08-27 | 2019-02-22 | 许继集团有限公司 | A kind of broken string recognition methods of high voltage power cable circulating current sensor and device |
| CN109035659B (en) * | 2018-08-27 | 2020-02-21 | 许继集团有限公司 | Anti-theft cutting monitoring method and device for high-voltage power cable |
| CN110940886A (en) * | 2018-09-25 | 2020-03-31 | 长沙理工大学 | 110kV cross-connection cable fault diagnosis method based on differential current analysis |
| CN110095698A (en) * | 2019-06-18 | 2019-08-06 | 山东钢铁股份有限公司 | A kind of metallic shield grounding monitoring system and method for single-core cable |
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Application publication date: 20160810 |
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