CN205210233U - Distribution network phase to earth fault detects and positioner - Google Patents
Distribution network phase to earth fault detects and positioner Download PDFInfo
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- CN205210233U CN205210233U CN201521096472.8U CN201521096472U CN205210233U CN 205210233 U CN205210233 U CN 205210233U CN 201521096472 U CN201521096472 U CN 201521096472U CN 205210233 U CN205210233 U CN 205210233U
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- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 8
- 238000011897 real-time detection Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 8
- 230000004807 localization Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
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- 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
Abstract
The utility model provides a distribution network phase to earth fault detects and positioner, includes low frequency signals generation unit, hands fault detection and positioning unit, low frequency signals generation unit includes that low frequency signals takes place module, power module for output low -frequency voltage sinusoidal signal. Power module comprises battery and dc -to -ac converter, and is inside continuous with low frequency signals emergence module, for low frequency signals emergence module improvement electric energy, the low frequency signals generation unit outside is equipped with two output port: an output port A, the 2nd output port B, an output port A links to each other the 2nd output port B ground connection with trouble distribution network generating line. Handheld fault detection and positioning unit include intelligent control module, current transformer CT, voltage transformer PT, and current transformer CT, voltage transformer PT are connected respectively to the intelligent control module. The utility model discloses a signal of voltage and current to the different frequency gathers and detects, solved among the prior art fault type judge difficult to and the problem of the unable accurate positioning of fault point.
Description
Technical field
The utility model belongs to system for distribution network of power protection and control field, is that a kind of one-phase earthing failure in electric distribution network detects and locating device specifically.
Background technology
Distribution network failure location refers to when power distribution network breaks down, the localization of faults timely and accurately and fault zone, so that isolated fault and the power supply recovering non-faulting section in fault zone rapidly.Distribution network failure location and isolation are one of gordian techniquies of power distribution automation, and the fault recovery of power distribution network and equipment repairing are all be based upon on basis that fault accurately locates.
In the prior art, Fault Locating Method generally has following three kinds of methods: one is utilize automatic circuit and sectionaliser to carry out localization of fault; Two is utilize ca bin (FTU) and data acquisition to coordinate with Monitor and Control (SCADA) system to realize localization of fault; Three is utilize the customer service system of power supply department to make a call Trouble call (TroubleCall, TC) by user to carry out the localization of faults.Wherein first method is too high to equipment requirement, and due to must the wire-outgoing breaker of disjunction automatic circuit or main transformer station, therefore actually expands accident scope, if automatic circuit is refused point or breaker failure, understands further expansion accident scope; Simultaneously because the repeatedly coincidence of automatic circuit causes impact to power distribution network, especially coincide with permanent fault, the dash current of generation is excessive, likely causes the feeder line overload limit.The second, based on the disposable isolated fault of Fault Locating Method energy of FTU, overcomes the shortcoming of automatic circuit, and accurate positioning.But FTU and its communication cost all very huge, so in actual applications, just to node installation FTU important in network, most distribution is still difficult to realize at present.The third mode method does not need special equipment, and the Trouble call phone information only needing user to make just can judge out of order approximate location.But still there is trouble spot to be at present difficult to accurate location, to report the problems such as dangerous uncontrollable.And the testing result of said method is fault branch, be not accurate to the point that branch road may break down, therefore in the occasion of some special inconvenience observations or technical support cannot be provided to field work personnel night.
Summary of the invention
For prior art above shortcomings, can not the problem of accurate fault point for solving existing one-phase earthing failure in electric distribution network detection method, the utility model provides a kind of one-phase earthing failure in electric distribution network and detects and locating device, by gathering the voltage and current signal of different frequency and detect, achieve the accurate Calculation without fault type judgement and fault distance, solve fault type in prior art and judge difficulty, and trouble spot cannot pinpoint problem.
The technical scheme that the utility model adopts is:
A kind of one-phase earthing failure in electric distribution network detects and locating device, and comprise low frequency signal generating unit, hand-held fault detect and positioning unit, described low frequency signal generating unit comprises low frequency signal generation module, supply module, for output low frequency voltage sinusoidal signal.Described supply module is made up of battery and inverter, for low frequency signal generation module improves electric energy, described low frequency signal generating unit outside is provided with two output ports: the first output port A, the second output port B, first output port A is connected with fault power distribution network bus, the second output port B ground connection.Described hand-held fault detect and positioning unit comprise intelligent control module, Current Transmit, voltage transformer pt, and intelligent control module connects Current Transmit, voltage transformer pt respectively.
Described intelligent control module is made up of digital signal processor DSP and GPS locating module.
Current Transmit in described hand-held fault detect and positioning unit, is connected to optional position in distribution line, the current signal that in real-time detection line, this passes through.
Voltage transformer pt in described hand-held fault detect and positioning unit, is connected to optional position in distribution line, the voltage signal of this point in real-time detection line.
Described Current Transmit is split core type current transformer.
A kind of one-phase earthing failure in electric distribution network of the utility model detects and locating device, and technique effect is as follows:
1, positioning precision is high: first the utility model utilizes Current Transmit to realize branch current and detect, and then failure judgement branch road; Then utilize voltage transformer pt to realize voltage Differential Detection, trouble spot is accurately located.
2, do not affect by weather sight line etc.: being accurately positioned at of trouble spot also can be pipeline rider night provides technical support.
Accompanying drawing explanation
Fig. 1 is the connection diagram of the utility model device;
Fig. 2 is the enforcement illustration of the utility model device.
Wherein: CT-current transformer, PT-voltage transformer (VT).
Embodiment
A kind of one-phase earthing failure in electric distribution network detects and locating device, comprise low frequency signal generating unit, hand-held fault detect and positioning unit, described low frequency signal generating unit comprises low frequency signal generation module, supply module, for output low frequency voltage sinusoidal signal, low frequency signal generation module can select GY2006.Described supply module is made up of battery and inverter, inside is connected with low frequency signal generation module GY2006, for low frequency signal generation module improves electric energy, described low frequency signal generating unit outside is provided with two output ports: the first output port A, the second output port B, first output port A is connected with fault power distribution network bus, the second output port B ground connection.Described hand-held fault detect and positioning unit comprise intelligent control module, Current Transmit, voltage transformer pt, and intelligent control module connects Current Transmit, voltage transformer pt respectively.
Low frequency signal generation module, model: GY2006;
Intelligent control module, model: TMS320F28335+sirf5;
Current Transmit, model: Q80 split core type current transformer;
Voltage transformer pt, model: CHCS-PT107.
Described intelligent control module is made up of digital signal processor DSP and GPS locating module, and in this embodiment, digital signal processor DSP adopts TMS320F28335, GPS locating module to adopt sirf5.
Current Transmit in described hand-held fault detect and positioning unit, is connected to optional position in distribution line, the current signal that in real-time detection line, this passes through, and in this embodiment, Current Transmit adopts Q80 split core type current transformer.
Voltage transformer pt in described hand-held fault detect and positioning unit, is connected to optional position in distribution line, the voltage signal of this point in real-time detection line, and in this embodiment, voltage transformer pt adopts CHCS-PT107 high-accuracy voltage mutual inductor.
Described Current Transmit is split core type current transformer.
A kind of one-phase earthing failure in electric distribution network detects and localization method, comprises the following steps:
Under faulty line power down mode, user's first step by low frequency signal generating unit to fault ac bus and the earth between injected frequency within the scope of 1-220Hz, the low-frequency voltage sinusoidal signal that voltage magnitude is controlled within the scope of 0.2-10V, utilize hand-held fault detect and positioning unit in each branch road entrance or vicinity simultaneously, as a D1, D2, the current signal on each branch road is detected at Dn+1 place, if current amplitude corresponding to low frequency that inject contained in the current signal on a certain branch road is higher than other branch road, then this branch road is fault branch, suppose in the present embodiment that branch road 2 is for fault branch, the amplitude that the correspondence that then now D2 point place detects injects low-frequency current signal is the highest.
User's second step by low frequency signal generating unit between fault ac bus from the earth, to inject 2 class frequencys different, but frequency within the scope of 1-220Hz, the low-frequency voltage sinusoidal signal controlled within the scope of 0.2-10V of voltage magnitude.Utilize hand-held fault detect and positioning unit to detect at D2 point place simultaneously and record and corresponding inject the voltage signal of low-frequency voltage signal at this some place and current signal, comprise amplitude and phase place.
The D20 point at distance test point 20-50m last time place is inserted in hand-held fault detect and positioning unit by user the 3rd step, this distance can according to on-site actual situations, select the position of more convenient erection pick-up unit, distance first time check point can change between 20-50m, and concrete distance can be provided by GPS module collection.
User the 4th step injects 2 groups of low-frequency voltage sinusoidal signals identical with second step by low frequency signal generating unit between fault ac bus with the earth.Utilize hand-held fault detect and positioning unit to detect at D20 point place simultaneously and record and corresponding inject the voltage signal of low-frequency voltage signal at this some place and current signal, comprise amplitude and phase place.According to 4 groups of voltage and current signals that second step and the 4th step obtain, hand-held fault detect and positioning unit can implement accurately location to physical fault vertex type and position.
The utility model, by gathering the voltage and current signal of different frequency and detect, achieves the accurate Calculation without fault type judgement and fault distance, solve fault type in prior art and judge difficulty, and trouble spot cannot pinpoint problem.
Above-mentioned enforcement example of the present utility model is only for the utility model example is described, and is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, other multi-form change and variations can also be made on the basis of the above description.Here cannot give exhaustive to all embodiments.Every belong to the technical solution of the utility model the apparent change of amplifying out or variation be still in the row of protection domain of the present utility model.
Claims (5)
1. an one-phase earthing failure in electric distribution network detects and locating device, comprise low frequency signal generating unit, hand-held fault detect and positioning unit, it is characterized in that, described low frequency signal generating unit comprises low frequency signal generation module, supply module, for output low frequency voltage sinusoidal signal; Described low frequency signal generating unit outside is provided with two output ports: the first output port A, the second output port B, and the first output port A is connected with fault power distribution network bus, the second output port B ground connection; Described hand-held fault detect and positioning unit comprise intelligent control module, Current Transmit, voltage transformer pt, and intelligent control module connects Current Transmit, voltage transformer pt respectively.
2. a kind of one-phase earthing failure in electric distribution network detects and locating device according to claim 1, and it is characterized in that, described intelligent control module is made up of digital signal processor DSP and GPS locating module.
3. a kind of one-phase earthing failure in electric distribution network detects and locating device according to claim 1, it is characterized in that, Current Transmit in described hand-held fault detect and positioning unit, is connected to optional position in distribution line, the current signal that in real-time detection line, this passes through.
4. a kind of one-phase earthing failure in electric distribution network detects and locating device according to claim 1, it is characterized in that, voltage transformer pt in described hand-held fault detect and positioning unit, is connected to optional position in distribution line, the voltage signal of this point in real-time detection line.
5. according to claim 1 or 3, a kind of one-phase earthing failure in electric distribution network detects and locating device, and it is characterized in that, described Current Transmit is split core type current transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521096472.8U CN205210233U (en) | 2015-12-24 | 2015-12-24 | Distribution network phase to earth fault detects and positioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521096472.8U CN205210233U (en) | 2015-12-24 | 2015-12-24 | Distribution network phase to earth fault detects and positioner |
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| CN205210233U true CN205210233U (en) | 2016-05-04 |
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| CN201521096472.8U Expired - Fee Related CN205210233U (en) | 2015-12-24 | 2015-12-24 | Distribution network phase to earth fault detects and positioner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467274A (en) * | 2015-12-24 | 2016-04-06 | 国网浙江武义县供电公司 | Device for fault detection and positioning of single-phase grounding of power distribution network |
| CN107290629A (en) * | 2017-07-12 | 2017-10-24 | 国网青海省电力公司海南供电公司 | A kind of 10KV low-voltage networks Earth design method |
-
2015
- 2015-12-24 CN CN201521096472.8U patent/CN205210233U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467274A (en) * | 2015-12-24 | 2016-04-06 | 国网浙江武义县供电公司 | Device for fault detection and positioning of single-phase grounding of power distribution network |
| CN105467274B (en) * | 2015-12-24 | 2019-02-26 | 国网浙江武义县供电公司 | A kind of detection of one-phase earthing failure in electric distribution network and positioning device |
| CN107290629A (en) * | 2017-07-12 | 2017-10-24 | 国网青海省电力公司海南供电公司 | A kind of 10KV low-voltage networks Earth design method |
| CN107290629B (en) * | 2017-07-12 | 2020-09-01 | 国网青海省电力公司海南供电公司 | 10KV low-voltage distribution network ground fault positioning method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160504 Termination date: 20161224 |