CN203798964U - Fault locator of power distribution network - Google Patents
Fault locator of power distribution network Download PDFInfo
- Publication number
- CN203798964U CN203798964U CN201420141359.6U CN201420141359U CN203798964U CN 203798964 U CN203798964 U CN 203798964U CN 201420141359 U CN201420141359 U CN 201420141359U CN 203798964 U CN203798964 U CN 203798964U
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- China
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- signal transmission
- phase
- cpu
- distribution network
- central processing
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- Expired - Lifetime
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- 230000008054 signal transmission Effects 0.000 claims abstract description 27
- 238000012545 processing Methods 0.000 claims abstract description 16
- 238000012544 monitoring process Methods 0.000 claims description 16
- 238000010295 mobile communication Methods 0.000 claims description 7
- 230000001413 cellular effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract 4
- 239000000758 substrate Substances 0.000 abstract 1
- 230000001052 transient effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000004807 localization Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Locating Faults (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model discloses a fault locator of a power distribution network. The fault locator comprises a central processing unit, multiple signal transmission detection units, single-phase CTs, zero-sequence CTs and a substation PT, wherein the single-phase CTs, zero-sequence CTs and substrate PT are connected with the signal transmission detection units, the central processing unit is wirelessly communicated with the signal transmission detection units, the single-phase CTs are respectively connected to phases A, B and C of a distribution line, and the phases A, B and C of the distribution line simultaneously pass one zero-sequence CT. The fault locator has the advantages that the area of a location point can be determined; the nearer the signal transmission detection units are positioned to each other, the more accurate location is; technology is mature, and the reliability is high; the fault locator is suitable for 3-60kV power distribution networks in which neutral points are not grounded or grounded via arc extinguishing coils; and the fault locator is suitable for faults including metallic grounding, grounding via arcs, and grounding via a transitional resistor.
Description
Technical field
The utility model relates to a kind of distribution network fault positioning device based on residual voltage and zero-sequence current transient state jump signal.
Background technology
China 3～60kV power distribution network extensively adopts neutral non-effective grounding mode, is called again small current neutral grounding system, and the fault overwhelming majority of small current neutral grounding system is singlephase earth fault.While there is singlephase earth fault, ground current is very little, can under failure condition, continue operation 1～2 hour, but must find as early as possible trouble spot, and this has just proposed charged fault-location problem.
The online orientation problem of low current grounding is not well solved for a long time, and artificial line walking has not only expended a large amount of manpower and materials, and has extended power off time, affects power supply safety.There are two kinds of positioning products in scene at present, the first product is called " S " injection method, principle is to inject high-frequency signal from PT, along this signal of wireline inspection, position, but because line distribution capacitance forms path to high-frequency signal, therefore at regular link and branch, also can detect Injection Signal, cause locating inaccurate.Another kind of product is called " fault detector ", principle is that measuring circuit fault current positions, but fault detector measurement is phase current, because single-phase-to-ground current is much smaller than load current, therefore " fault detector " cannot accurately extract failure message, causes locating inaccurate.
Utility model content
The purpose of this utility model is exactly in order to address the above problem, and has proposed a kind of distribution network fault positioning device based on residual voltage and zero-sequence current transient state jump signal.The localization of faults quickly and accurately of this locating device, and be applicable to metallic earthing, through arcing ground, through various faults situations such as transition resistance eutral groundings.
To achieve these goals, the utility model adopts following technical scheme:
A distribution network fault positioning device, comprising: CPU (central processing unit), and some signal transmission detecting units, and be connected to single-phase CT, zero sequence CT and the substation PT on signal transmission detecting unit; Described CPU (central processing unit) is communicated by letter with some signal transmission of monitoring unit wireless, described single-phase CT is connected on respectively on A, B, the C three-phase of distribution line, the A of distribution line, B, C three-phase are simultaneously through zero sequence CT, and described single-phase CT, zero sequence CT are all connected with signal transmission of monitoring unit with substation PT.
Described single-phase CT is installed in switch cubicle or on pole line, zero sequence CT is installed in switch cubicle.
Described signal transmission of monitoring cellular installation is in transformer station or on distribution line.
Described signal transmission of monitoring unit comprises: CPU, and the A/D modular converter being connected with CPU, mobile communication module and GPS module, described A/D modular converter is also connected with wave filter.
Described CPU (central processing unit) is the industrial computer with fault signal analysis function.
Described CPU (central processing unit) comprises: CPU, and the display being connected with CPU, hardware peripherals and mobile communication module.
The beneficial effects of the utility model are:
1. can localization of faults region, signal transmission of monitoring unit interval is less, and it is more accurate to locate.
Signal transmission of monitoring cellular installation on the line, without manually along line inspection.
3. can in the situation of operating with failure, locate, improve system reliability of operation.
4. technology maturation, reliability are high, are applicable to the power distribution network of 3～60kV isolated neutral or neutral by arc extinction coil grounding, are applicable to metallic earthing, through arcing ground, through various faults situations such as transition resistance eutral groundings.
5. after fault occurs, fault section be can determine fast, service restoration and load safe transfer carried out in time.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model distribution network fault positioning device;
Fig. 2 is the structural representation of the single-phase CT of the utility model;
Fig. 3 is the structural representation of the utility model zero sequence CT;
Fig. 4 is the utility model signal transmission of monitoring cell schematics;
Fig. 5 is the utility model CPU (central processing unit) schematic diagram;
Fig. 6 is that the utility model is specifically implemented schematic diagram.
Wherein, 1. single-phase CT, 2. zero sequence CT, 3. substation PT, 4. signal transmission of monitoring unit, 5. CPU (central processing unit).
Embodiment:
Below in conjunction with accompanying drawing and embodiment, the utility model is described further:
As shown in Fig. 1-6, the distribution network fault positioning device based on residual voltage and zero-sequence current transient state jump signal, comprising: signal transmission detecting unit 4 and CPU (central processing unit) 5, zero sequence CT2, three single-phase CT1 and substation PT 3.
Single-phase CT1 is arranged on respectively on A, B, the C three-phase of distribution line, and zero sequence CT2 is installed on A, B, the C three-phase of distribution line, makes the whole punchings of three-phase line and mistake, and signal transmission of monitoring unit 4 is connected respectively with single-phase CT1, zero sequence CT2 and substation PT 3.
Wherein, one group of zero sequence CT2, three single-phase CT1 and bis-residual voltages 3 of PT, be connected to the signal transmission detecting unit 4 in transformer station, and other two groups of zero sequence CT2 and three single-phase CT1 are connected respectively to the signal transmission detecting unit 4 on circuit.
Signal transmission of monitoring unit 4 comprises: CPU, and the A/D modular converter being connected with CPU, mobile communication module and GPS module, described A/D modular converter is also connected with wave filter.The collection of multi-analog is supported in signal transmission of monitoring unit 4.
CPU (central processing unit) 5 is for having the industrial computer of fault signal analysis function.CPU (central processing unit) 5 comprises: CPU, and the display being connected with CPU, hardware peripherals and mobile communication module.
CPU (central processing unit) 5 is realized and being communicated by letter by mobile communication module with signal transmission of monitoring unit 4, and by hardware adaptor, realizes man-machine interaction, the functions such as backstage demonstration.
Although above-mentioned, by reference to the accompanying drawings embodiment of the present utility model is described; but the not restriction to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection domain of the present utility model.
Claims (6)
1. a distribution network fault positioning device, is characterized in that, comprising: CPU (central processing unit), and some signal transmission detecting units, and be connected to single-phase CT, zero sequence CT and the substation PT on signal transmission detecting unit; Described CPU (central processing unit) is communicated by letter with some signal transmission of monitoring unit wireless, described single-phase CT is connected on respectively on A, B, the C three-phase of distribution line, the A of distribution line, B, C three-phase are simultaneously through zero sequence CT, and described single-phase CT, zero sequence CT are all connected with signal transmission of monitoring unit with substation PT.
2. a kind of distribution network fault positioning device as claimed in claim 1, is characterized in that, described single-phase CT is installed in switch cubicle or on pole line, zero sequence CT is installed in switch cubicle.
3. a kind of distribution network fault positioning device as claimed in claim 1, is characterized in that, described signal transmission of monitoring cellular installation is in transformer station or on distribution line.
4. a kind of distribution network fault positioning device as claimed in claim 1, it is characterized in that, described signal transmission of monitoring unit comprises: CPU, and the A/D modular converter being connected with CPU, mobile communication module and GPS module, described A/D modular converter is also connected with wave filter.
5. a kind of distribution network fault positioning device as claimed in claim 1, is characterized in that, described CPU (central processing unit) is the industrial computer with fault signal analysis function.
6. a kind of distribution network fault positioning device as claimed in claim 1, is characterized in that, described CPU (central processing unit) comprises: CPU, and the display being connected with CPU, hardware peripherals and mobile communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420141359.6U CN203798964U (en) | 2014-03-26 | 2014-03-26 | Fault locator of power distribution network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420141359.6U CN203798964U (en) | 2014-03-26 | 2014-03-26 | Fault locator of power distribution network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203798964U true CN203798964U (en) | 2014-08-27 |
Family
ID=51381168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420141359.6U Expired - Lifetime CN203798964U (en) | 2014-03-26 | 2014-03-26 | Fault locator of power distribution network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203798964U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297633A (en) * | 2014-10-14 | 2015-01-21 | 安徽科盟电子科技有限公司 | Power distribution network fault positioning system |
| CN105182165A (en) * | 2015-09-24 | 2015-12-23 | 山西大学 | System of mobile power supply ground wire connection state real-time monitoring and fault positioning |
-
2014
- 2014-03-26 CN CN201420141359.6U patent/CN203798964U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297633A (en) * | 2014-10-14 | 2015-01-21 | 安徽科盟电子科技有限公司 | Power distribution network fault positioning system |
| CN105182165A (en) * | 2015-09-24 | 2015-12-23 | 山西大学 | System of mobile power supply ground wire connection state real-time monitoring and fault positioning |
| CN105182165B (en) * | 2015-09-24 | 2017-12-05 | 山西大学 | A kind of mobile power supply ground wire connection status monitors in real time and the system of fault location |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140827 |