CN109581152A - A kind of district cable fault detection system and method - Google Patents
A kind of district cable fault detection system and method Download PDFInfo
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- CN109581152A CN109581152A CN201811641956.4A CN201811641956A CN109581152A CN 109581152 A CN109581152 A CN 109581152A CN 201811641956 A CN201811641956 A CN 201811641956A CN 109581152 A CN109581152 A CN 109581152A
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- 238000001514 detection method Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000004146 energy storage Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 7
- 230000002159 abnormal effect Effects 0.000 description 6
- 230000005611 electricity Effects 0.000 description 6
- 230000006837 decompression Effects 0.000 description 4
- 239000002699 waste material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Alarm Systems (AREA)
- Locating Faults (AREA)
Abstract
The present invention relates to a kind of district cable fault detection system and methods, the system include input terminal be connected to the branch cable of power grid and between branch cable and trunk cable joint level-one relay, high-pressure side is connected to the transformer of the normally-closed contact output end of the level-one relay, input terminal is connected to the second level relay of the low-pressure side of the transformer and the concatenated detection circuit of normally opened contact output end with the second level relay, the detection circuit includes sequentially connected power supply device, processing unit and wireless base station apparatus, the normally opened contact output end of the second level relay and the detection circuit are formed into a loop, the processing unit is also connect with identity device.Technical solution provided by the invention can quickly determine the information such as the position of the branch cable to break down in scarcely populated regional power grid.
Description
Technical field
The present invention relates to technical field of power systems more particularly to a kind of district cable fault detection systems and method.
Background technique
China has a vast territory, if when being located at the power equipments such as the rare area erection cable of western's cigarette, due to needing
The branch cable for substation or other equipment is drawn at the certain intervals of trunk cable, or in longer branch cable
Secondary branch cable is above further drawn, but because of the factors such as the density of population and environment, it may only be possible to the event to trunk cable
Hinder and accurately monitored, but since the distribution of each branch cable is more wide and dispersion, is difficult to carry out accurately, timely its failure
Detection, and perform corresponding processing, and this will cause the waste or even certain safety accident of electric power resource.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of district cable fault detection system and method.
On the one hand, the present invention provides a kind of district cable fault detection system, which includes that input terminal is connected to power grid
Branch cable and the level-one relay of joint, high-pressure side are connected to the level-one between branch cable and trunk cable
Transformer, the input terminal of the normally-closed contact output end of relay be connected to the low-pressure side of the transformer second level relay and
With the concatenated detection circuit of normally opened contact output end of the second level relay, the detection circuit includes sequentially connected power supply
Device, processing unit and wireless base station apparatus, normally opened contact output end and the detection circuit of the second level relay are formed
Circuit, the processing unit are also connect with identity device.
The beneficial effect of district cable fault detection system provided by the invention is, larger for region span but along informant
The more rare power grid of group, in branch cable close to the Small Substation upstream end of trunk cable joint, such as power grid branch line
Level-one relay is accessed, normally-closed contact accesses a step-down transformer, that is to say, that in the situation that branch cable state is normal
Under, transformer will be kept as electricity condition, therefore the normally opened contact of the second level relay of low-pressure side will be also in an off state.When
When decompression or phase shortage occurs in branch cable, the normally-closed contact of level-one relay be will be switched off, and transformer will be in power failure state, second level
The normally opened contact of relay correspondingly will be also closed, so that the normally opened contact of detection circuit and second level relay be made to form conducting
Circuit.In detection circuit, temporary source is provided by power supply device, processing unit is obtaining branch line electricity herein based on identity device
After the identification information such as geographical location or installation number of cable, identification information can be sent to power grid prison by wireless base station apparatus
Control center makes staff know the branch cable position broken down in time and is accordingly disposed as early as possible, to avoid electric power
The waste of resource and the generation of subsequent possible safety accident.
Based on the above technical solution, the present invention can also be improved as follows.
Further, temperature relay is also connected between the level-one relay and the transformer.
Beneficial effect using above-mentioned further scheme is to be installed on branch line electricity for the fault detection system of branch cable
On cable, such as it is installed in route substation, for abnormal conditions such as fire except the faults itselfs such as power grid decompression, phase shortage,
It can be monitored by the temperature relay being series between level-one relay and transformer, if there is such as substation's temperature
The case where higher than threshold value illustrates that the abnormal conditions such as fire probably occur, and transformer will be disconnected due to temperature relay at this time
It opens and power loss, and leads to the conducting of detection circuit, processing unit is obtained by wireless base station apparatus transmission based on identity device
The identification information of branch cable herein.
Further, switching device is also connected between the branch cable and the level-one relay.
Further, switching device is also connected between the second level relay and the detection circuit.
Beneficial effect using above-mentioned further scheme is, due to the voltage of trunk cable or even branch cable usually compared with
Height disconnects branch cable and level-one relay or second level relay when installing or overhauling the fault detection system of branch cable
The switching device concatenated between detection circuit, not only can be with effective protection installation personnel, can also be with effective protection detection circuit
In each component.After being installed, the corresponding switching device of reclosable.
Further, safety device is also connected between the branch cable and the level-one relay.
Beneficial effect using above-mentioned further scheme is, when there are the abnormal conditions such as current overload in branch cable, example
If the safety device of fuse will fuse, detection circuit will be connected and send corresponding branch cable identification information.Meanwhile it fusing
Afterwards, each component of detection system can also be protected.
Further, the power supply device is clean energy resource generating and energy storage device.
Beneficial effect using above-mentioned further scheme is, using the clean energy resourcies electrification energy storage such as such as solar energy or wind energy
Device is detection circuit each component power supply, is not only conducive to environmental protection, it is also ensured that when grid experiences power loss failure, detection circuit according to
It can so work normally.
Further, the identity device is GPS positioning device or encoder.
Beneficial effect using above-mentioned further scheme is to can get the branch line to break down electricity by GPS positioning device
The geographical location of cable is numbered by the installation that encoder can get the branch cable to break down, can be used as identification information side
Staff is helped quickly to determine the relevant information of branch cable.
Further, the wireless base station apparatus is 4G sender unit.
Beneficial effect using above-mentioned further scheme is that identification information can be quickly sent to for example electric by 4G network
Net monitoring center.
On the other hand, the present invention also provides a kind of detection methods applied to above-mentioned zone Cable fault examination system, should
Method includes the following steps:
When branch cable power loss, processing unit sends the branch obtained based on identity device by wireless base station apparatus
The identification information of line cable.
Further, be also connected between level-one relay and transformer temperature for detecting the branch cable temperature after
Electric appliance, this method further include following steps:
When the temperature of branch cable is more than preset threshold, processing unit is sent by wireless base station apparatus based on mark dress
Set the identification information of the branch cable of acquisition.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of the district cable fault detection system of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the district cable fault detection system of another embodiment of the present invention.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
As shown in Figure 1, a kind of district cable fault detection system provided in an embodiment of the present invention includes that input terminal is connected to
The branch cable 20 of power grid and the level-one relay 21 of joint, high-pressure side company between branch cable 20 and trunk cable 10
Be connected to the normally-closed contact output end of level-one relay 21 transformer 22, input terminal be connected to transformer 22 low-pressure side two
Grade relay 23 and the detection circuit connecting with the normally opened contact output end of second level relay 23, the detection circuit include
Power supply device 26, processing unit 24 and the wireless base station apparatus 25 being sequentially connected in series, the normally opened contact output of the second level relay
End is formed into a loop with the detection circuit, and processing unit 24 is also connect with identity device 27.
In the present embodiment, larger for region span but crowd's more rareness along the line power grid, it is close in branch cable
Trunk cable joint, such as the Small Substation upstream end of power grid branch line access level-one relay, normally-closed contact access one
Step-down transformer, that is to say, that in the normal situation of branch cable state, transformer will be kept as electricity condition, low-pressure side
The normally opened contact of second level relay also will therefore be in an off state.When there is decompression or phase shortage in branch cable, level-one after
The normally-closed contact of electric appliance will be switched off, and transformer will be in power failure state, and the normally opened contact of second level relay correspondingly will be also closed,
To make the normally opened contact of detection circuit and second level relay form the circuit of conducting.In detection circuit, mentioned by power supply device
For temporary source, processing unit is in the mark such as geographical location or installation number for obtaining branch cable herein based on identity device
After knowing information, identification information can be sent to power system monitor center by wireless base station apparatus, staff is made to know to occur in time
The branch cable position of failure is simultaneously accordingly disposed as early as possible, to avoid the waste and subsequent possible safety accident of electric power resource
Generation.
In fig. 1 and 2, the left side of level-one relay 21 and second level relay 23 can be considered as to input terminal, that is, main
Contact, right side upper end are considered as normally opened contact, and right side lower end is considered as normally-closed contact.
Preferably, as shown in Fig. 2, being also connected with temperature relay 28 between level-one relay 21 and transformer 22.
It is installed on branch cable, such as is installed in route substation for the fault detection system of branch cable, it is right
The abnormal conditions such as the fire except the faults itselfs such as power grid decompression, phase shortage, can be by being series at level-one relay and transformer
Between temperature relay the case where being monitored, being higher than threshold value if there is such as substation's temperature, illustrate very possible hair
The abnormal conditions such as calamity of lighting a fire, transformer is by the power loss due to the disconnection of temperature relay at this time, and leads to the conducting of detection circuit,
Processing unit sends the identification information of the branch cable herein obtained based on identity device by wireless base station apparatus.
Preferably, switching device is also connected between branch cable 20 and level-one relay 21.
Preferably, switching device is also connected between second level relay 23 and the detection circuit.
Since the voltage of trunk cable or even branch cable is usually higher, in the failure inspection for installing or overhauling branch cable
When examining system, the switching device concatenated between branch cable and level-one relay or second level relay and detection circuit is disconnected, no
Only can be with effective protection installation personnel, it can also be with each component in effective protection detection circuit.After being installed, reclosable
Corresponding switching device.
Each component in detection circuit has been collectively constituted with the second level relay normally open contact output end after power loss closure
Whole circuit, switching device can be located at normally opened contact.
Preferably, safety device is also connected between branch cable 20 and level-one relay 21.
When the abnormal conditions such as current overload occurs in branch cable, such as the safety device of fuse will fuse, detection electricity
Road will be connected and send corresponding branch cable identification information.Meanwhile after fusing, each component of detection system can also be protected.
Preferably, power supply device 26 is clean energy resource generating and energy storage device.
Use the clean energy resource generating and energy storage device such as solar energy or wind energy for each component power supply of detection circuit, not only
Conducive to environmental protection, it is also ensured that when grid experiences power loss failure, detection circuit can still be worked normally.
Preferably, identity device 27 is GPS positioning device or encoder.
The geographical location that can get the branch cable to break down by GPS positioning device can get hair by encoder
The installation number of the branch cable of raw failure can be used as the correlation that identification information helps staff quickly to determine branch cable
Information
Preferably, wireless base station apparatus 25 is 4G sender unit.
Identification information can quickly be sent to such as power system monitor center by 4G network.
Processing unit can be single-chip microcontroller or embedded equipment, if the detection system for different branch cables is distinguished
Different Initialize installations is carried out, the identification informations such as geographical location or installation number can be previously stored in single-chip microcontroller, to it
When being connected because of the detection circuit of corresponding branch cable, directly identification information can be issued.
The embodiment of the present invention also provides a kind of district cable fault detection method, is applied to above-mentioned zone Cable fault examination
System, described method includes following steps:
When 20 power loss of branch cable, processing unit 24 is sent by wireless base station apparatus 25 and is obtained based on identity device 27
The branch cable 20 identification information.
Preferably, it is also connected between level-one relay 21 and transformer 22 for detecting 20 temperature of branch cable
Temperature relay, the method also includes following steps:
When the temperature of branch cable 20 is more than preset threshold, processing unit 24 sends base by wireless base station apparatus 25
In the identification information for the branch cable 20 that identity device 27 obtains.
Reader should be understood that in the description of this specification reference term " one embodiment ", " is shown " some embodiments "
The description of example ", specific examples or " some examples " etc. mean specific features described in conjunction with this embodiment or example, structure,
Material or feature are included at least one embodiment or example of the invention.In the present specification, above-mentioned term is shown
The statement of meaning property need not be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described
It may be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this
The technical staff in field can be by the spy of different embodiments or examples described in this specification and different embodiments or examples
Sign is combined.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of district cable fault detection system, which is characterized in that the system comprises the branch lines that input terminal is connected to power grid
Cable (20) and the level-one relay (21) of joint, high-pressure side connection between branch cable (20) and trunk cable (10)
The transformer (22) is connected in transformer (22), the input terminal of the normally-closed contact output end of the level-one relay (21)
The second level relay (23) of low-pressure side and the concatenated detection circuit of normally opened contact output end with the second level relay (23),
The detection circuit includes sequentially connected power supply device (26), processing unit (24) and wireless base station apparatus (25), and described two
The normally opened contact output end of grade relay (23) and the detection circuit are formed into a loop, and the processing unit (24) also fills with mark
Set (27) connection.
2. district cable fault detection system according to claim 1, which is characterized in that the level-one relay (21) and
Temperature relay (28) are also connected between the transformer (22).
3. district cable fault detection system according to claim 1, which is characterized in that the branch cable (20) and institute
It states and is also connected with switching device between level-one relay (21).
4. district cable fault detection system according to claim 1, which is characterized in that the second level relay (23) and
Switching device is also connected between the detection circuit.
5. district cable fault detection system according to claim 1, which is characterized in that the branch cable (20) and institute
It states and is also connected with safety device between level-one relay (21).
6. district cable fault detection system according to any one of claims 1 to 5, which is characterized in that the power supply dress
Setting (26) is clean energy resource generating and energy storage device.
7. district cable fault detection system according to any one of claims 1 to 5, which is characterized in that the mark dress
Setting (27) is GPS positioning device or encoder.
8. district cable fault detection system according to any one of claims 1 to 5, which is characterized in that the wireless hair
Sending device (25) is 4G sender unit.
9. a kind of district cable fault detection method, which is characterized in that be applied to the described in any item regions of claim 1 to 8
Cable fault examination system, described method includes following steps:
When branch cable (20) power loss, processing unit (24) is sent by wireless base station apparatus (25) and is based on identity device (27)
The identification information of the branch cable (20) obtained.
10. district cable fault detection system according to claim 9, which is characterized in that level-one relay (21) and change
The temperature relay for detecting the branch cable (20) temperature is also connected between depressor (22), the method also includes such as
Lower step:
When the temperature of branch cable (20) is more than preset threshold, processing unit (24) sends base by wireless base station apparatus (25)
In the identification information for the branch cable (20) that identity device (27) obtain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811641956.4A CN109581152A (en) | 2018-12-29 | 2018-12-29 | A kind of district cable fault detection system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811641956.4A CN109581152A (en) | 2018-12-29 | 2018-12-29 | A kind of district cable fault detection system and method |
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Family
ID=65932773
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| CN201811641956.4A Pending CN109581152A (en) | 2018-12-29 | 2018-12-29 | A kind of district cable fault detection system and method |
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| KR100721251B1 (en) * | 2005-12-02 | 2007-05-22 | 엘에스산전 주식회사 | Monitoring system of underground power line |
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