CN201965197U - Single-phase grounding fault positioning system of distribution network - Google Patents
Single-phase grounding fault positioning system of distribution network Download PDFInfo
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- CN201965197U CN201965197U CN2011200976650U CN201120097665U CN201965197U CN 201965197 U CN201965197 U CN 201965197U CN 2011200976650 U CN2011200976650 U CN 2011200976650U CN 201120097665 U CN201120097665 U CN 201120097665U CN 201965197 U CN201965197 U CN 201965197U
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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 relates to a single-phase grounding fault positioning system of a distribution network, which mainly comprises a power extraction module, a communication module and a server, wherein the voltage extraction gradient of the power extraction module is above 200mm; the power extraction module is connected with the server through the communication module via internet; and the power extraction module supplies power to the communication module. The single-phase grounding fault positioning system of the distribution network adopts a fault rod voltage gradient method, the power extraction module is arranged at an appropriate position on each level of cement pole to be positioned; when a line has single-phase grounding faults, the power extraction module which has a fault rod extracts fault voltage, the fault rod reports the transformer substation name, the line name and the tower name of the fault to a distribution network fault management center by general packet radio service (GPRS) communication means, and the cement pole which does not have any fault cannot communicated with a central station because no power supply exists, so that accurate fault positioning is realized.
Description
Technical field
The utility model relates to a kind of distribution network automated field, particularly relates to a kind of one-phase earthing failure in electric distribution network positioning system.
Background technology
One-phase earthing failure in electric distribution network is caused by following reason usually: porcelain vase punctures, wiring is loosening, lightning arrester punctures, artificial malice parabolic etc., is characterized in that fault current flows into the earth by cement pole.The one-phase earthing failure in electric distribution network positioning system mainly contains traveling wave method, low-frequency ac signal injection method, pulse signal injection method and fault detector method at present.
Traveling wave method is to realize localization of fault according to row ripple transmission theory, generally can be divided into A, B, several classes of C type.A type traveling wave method is the capable ripple that utilizes the trouble spot to produce, and comes the position of the localization of faults according to measurement point to the time and the row wave-wave speed of trouble spot round trip; The Type B traveling wave method is to utilize the moment at the capable ripple arrival circuit two ends that the trouble spot produces and by the realization localization of fault of writing to each other; C type traveling wave method is the back to take place by device emission high voltagehigh frequency or dc pulse signal in fault, positions two-way time to the trouble spot from device according to high-frequency impulse.Power distribution network can only adopt C type traveling wave method to carry out single-ended location, inject S marking current (being AC signal) by bus PT (voltage transformer (VT)) mutually to the ground connection of ground wire, its frequency is between power frequency nth harmonic and the n+1 subharmonic, great majority are selected 220Hz, the trouble spot is searched on hand-held then signal sensor road along the line, and the current vanishes place is the trouble spot.The shortcoming of this method is: inject the finite energy of signal, because the capacity limit of PT can only be injected the 50mA electric current to circuit; Injected frequency 220Hz, frequency is too high, is subjected to the arrangement of conductors capacitive effect bigger, if the trouble spot is through very big resistance eutral grounding, as through cement pole ground connection, perhaps the trouble spot is far apart from circuit top, signal also can't effectively be located very faint can't accurately the measurement fault so.
The thinking of low-frequency ac signal injection method is: circuit occurs after the singlephase earth fault, has a power failure to inject AC signal mutually to fault under off-line state, detects with dichotomy with hand-held AC signal detector road along the line then, till finding fault.Low-frequency ac signal, electric current are 150mA, 60 hertz of frequencies, the hand-held signal sensor of testing staff carries out ground with dichotomy along faulty line and patrols survey, when recording circuit electric current is arranged, the downstream of trouble spot at measurement point is described, if no current illustrates the upstream of trouble spot at measurement point.The indication of the waveform of detector has significantly variation significantly before and after the trouble spot, according to the significant change failure judgement point place of indicator.This method has reached realistic scale, but working strength is bigger, and detection efficiency is lower.
The pulse signal injection method is the technology that Japan adopts, and has reached the practicability level, in China use is arranged also at present.It is to inject high-voltage pulse mutually to fault that pulse signal injects ratio juris, and voltage reaches as high as 15kV, and the recurrence interval is 6 seconds.Detect this pulse signal with handheld pulse signal detector road along the line then, the testing staff must step on the bar detection during detection, the handheld pulse signal detector is hung on the lead about two meters of its insulating bar length.When detecting pulse signal, detecting device will send sound, the trouble spot is described in the downstream, if do not have sound explanation trouble spot in the upstream, also detects with same way at the take-off point place, and soniferous is fault branch, and what do not have sound is not fault branch.The pulse injection method is subjected to the arrangement of conductors capacitive effect bigger, so measuring distance is 5km, when line length surpasses 5km, injects signaling point and also will move forward.The pulse signal injection method goes for the distribution network failure location, and the workload when still detecting is bigger.
The principle of fault detector technology is to inject marking current in transformer station to fault phase bus, and this marking current is sent by transformer station, flows into the earth return signal source through failure path by earth point.The fault detector that hangs over failure path detects this signal and provides indication (board turning) immediately.Hang over the indication motionless (not board turning) on the non-failure path.The indicator board turning is represented the downstream of earth point at this indicator, and at take-off point, according to the action of indicator whether, judging which branch is fault branch.The operations staff makes an inspection tour forward by the guiding of indicator, until finding fault branch and earth fault.Fault detector the earliest is used to seek short trouble branch and short circuit trouble point.Fault detector promotes the use of the low current neutral grounding electric network single-phase earth fault route selection subsequently, is called earth-fault indicator.Earth-fault indicator and short trouble indicator are all used to some extent at China's medium voltage distribution network.The advantage of fault detector is that structure and principle are simple, and low price is installed easily, and the user reflects that the practical function of short trouble indicator still is reasonable.The result of use of existing earth-fault indicator is then not really desirable, and accuracy is not high, and usually not reaction can not satisfactorily resolve the distribution network failure orientation problem during electrical network generation singlephase earth fault.
This shows that above-mentioned existing one-phase earthing failure in electric distribution network positioning system obviously still has inconvenience and defective, and demands urgently further being improved.How to found a kind of can be when singlephase earth fault appears in the 10kV power circuit, report the particular location of trouble spot rapidly and accurately to power distribution network administrative center, one-phase earthing failure in electric distribution network positioning system with new structure of characteristics such as the route selection location is integrated, detection is efficient and convenient, real one of the current industry important research project that belongs to.
The utility model content
The technical problems to be solved in the utility model provides a kind of one-phase earthing failure in electric distribution network positioning system, make it can be when singlephase earth fault appears in the 10kV power circuit, report the particular location of trouble spot rapidly and accurately to power distribution network administrative center, have characteristics such as the route selection location is integrated, detection is efficient and convenient, thereby overcome the deficiency of existing one-phase earthing failure in electric distribution network positioning system.
For solving the problems of the technologies described above, a kind of one-phase earthing failure in electric distribution network positioning system of the utility model mainly comprises power supply extraction module, communication module and server, and wherein: the voltage subtraction gradient of power supply extraction module is more than the 200mm; The power supply extraction module is connected with server network by communication module; The power supply extraction module is the communication module power supply.
As a kind of improvement of the present utility model, described network is connected to the cable network connection or wireless network connects.
Described communication module is one or more the combination in GPRS network communication module, GSM SMS module, cdma communication module, the radio module.
Also comprise alarm module, the power supply extraction module is connected with this alarm module, and is the alarm module power supply.
Described power supply extraction module comprises annular anchor ear, high-voltage conducting wires, overvoltage crowbar, rectification circuit and mu balanced circuit composition, and wherein: high-voltage conducting wires is fixed on the cross-arm of power distribution network shaft tower, as a utmost point that extracts power supply; Annular anchor ear is enclosed within on the cement pole of power distribution network shaft tower, as another utmost point of power supply; Overvoltage crowbar, rectification circuit and mu balanced circuit are connected successively.
The spacing of described high-voltage conducting wires and annular anchor ear is more than the 200mm.
After adopting such design, the utility model adopts breakdown stick voltage gradient method, the power supply extraction module is installed in appropriate location on each class g cement bar of needs location, after singlephase earth fault appears in circuit, the power supply extraction module of bar of breaking down extracts false voltage, this breakdown stick with the GPRS means of communication to power transformation name of station, circuit name and the shaft tower of distribution network failure administrative center report fault number, and the cement pole that does not break down is not because there is power supply not communicate by letter with central station, thereby realizes localization of fault accurately.
Description of drawings
Above-mentioned only is the general introduction of technical solutions of the utility model, and for can clearer understanding technological means of the present utility model, the utility model is described in further detail below in conjunction with accompanying drawing and embodiment.
Fig. 1 is the composition synoptic diagram of the utility model one-phase earthing failure in electric distribution network positioning system.
Embodiment
The utility model one-phase earthing failure in electric distribution network positioning system mainly comprises power supply extraction module, communication module and server.
Wherein, see also shown in Figure 1, the power supply extraction module by be connected on the cross-arm high-voltage conducting wires 3 and apart from two utmost points of the annular anchor ear more than the cross-arm 200mm 2 as power supply.During installation, at first circuit board and the rainproof shell thereof with the power supply extraction module is buckled on the shaft tower 1 with annular anchor ear 2, high-voltage conducting wires 3 usefulness magnetic chucks 4 inhaled on cross-arm 5 again.During use, be positioned at high-voltage conducting wires 3 and annular anchor ear 2 insulation, and link with circuit board respectively, can extract electric energy more than the above gradient of 200mm on the breakdown stick, 10V, the 400mA as sampling and communication power supply.
Extracting power supply from the fault energy is key component of the present utility model, because the voltage that is distributing and producing on the breakdown stick per unit length by fault current, therefore can directly from the fault energy, extract power supply, and do not need to provide power supply for warning device specially: there is fault that power supply is just arranged, just can sends failure message; Do not have power supply without fault, do not need to send failure message.In addition, because sampling power supply and communication power supply maximum demand 4V voltage and 400mA electric current, promptly therefore the energy of 1.6W needs only the earth fault energy and just can extract enough sampling power supply and communication power supply greater than 1.6W.No matter what kind of earthing mode the neutral point of transformer adopts or adopts earth-free mode, and its earth fault energy all is far longer than 1.6W.This earth fault energy and line length are irrelevant, and the high electric current of earth fault voltage is little in short-term for circuit, and earth fault voltage low current was big when circuit was long, and its grounded energy is more than 1000W.Therefore the inventive method is applicable to the distribution network failure location of any line length of any earthing mode.
Communication module can be selected wireless communication modules such as GPRS network communication module, GSM SMS module, cdma communication module for use, rely on existing communication network and SIM card technology etc., can realize communicating to connect between power distribution network management center server and each the shaft tower sensor.The fault-signal of transmission can comprise the information that the shaft tower number is formed, can also comprise national number, province state number, city number, transformer station's number, circuit number etc. according to concrete regulatory requirement, be convenient in time judge fault has taken place in which bar outlet on the bus, and the particular location of the localization of faults, realize the integrated of route selection and location.
In the area that mobile communication can not cover, can also adopt radio communication module, but the wireless communication transmissions distance has only 1 kilometer, therefore need the hand-hold wireless receptacle to drive near the road the circuit, to survey.
Preferable, also can be the power supply extraction module and also can connect an alarm module, the voltage that this alarm module also extracts with the power supply extraction module when fault takes place, can be made the alarm indication as power supply in shaft tower this locality.
The utility model one-phase earthing failure in electric distribution network positioning system, extract the power supply of the gradient voltage of breakdown stick by the power supply extraction module as communication module, by wired or wireless network failure message is sent to the server of power distribution network administrative center by communication module again, localization of fault accurately, quick.
The above; it only is preferred embodiment of the present utility model; be not that the utility model is done any pro forma restriction, those skilled in the art utilize the technology contents of above-mentioned announcement to make a little simple modification, equivalent variations or modification, all drop in the protection domain of the present utility model.
Claims (6)
1. an one-phase earthing failure in electric distribution network positioning system is characterized in that mainly comprising power supply extraction module, communication module and server, wherein:
The voltage subtraction gradient of power supply extraction module is more than the 200mm;
The power supply extraction module is connected with server network by communication module;
The power supply extraction module is the communication module power supply.
2. one-phase earthing failure in electric distribution network positioning system according to claim 1 is characterized in that described network is connected to the cable network connection or wireless network connects.
3. one-phase earthing failure in electric distribution network positioning system according to claim 1 is characterized in that described communication module is one or more the combination in GPRS network communication module, GSM SMS module, cdma communication module, the radio module.
4. one-phase earthing failure in electric distribution network positioning system according to claim 1 is characterized in that also comprising alarm module, and the power supply extraction module is connected with this alarm module, and is the alarm module power supply.
5. according to each described one-phase earthing failure in electric distribution network positioning system among the claim 1-4, it is characterized in that described power supply extraction module comprises annular anchor ear, high-voltage conducting wires, overvoltage crowbar, rectification circuit and mu balanced circuit composition, wherein:
High-voltage conducting wires is fixed on the cross-arm of power distribution network shaft tower, as a utmost point that extracts power supply;
Annular anchor ear is enclosed within on the cement pole of power distribution network shaft tower, as another utmost point of power supply;
Overvoltage crowbar, rectification circuit and mu balanced circuit are connected successively.
6. one-phase earthing failure in electric distribution network positioning system according to claim 5, the spacing that it is characterized in that described high-voltage conducting wires and annular anchor ear is more than the 200mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200976650U CN201965197U (en) | 2011-04-06 | 2011-04-06 | Single-phase grounding fault positioning system of distribution network |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200976650U CN201965197U (en) | 2011-04-06 | 2011-04-06 | Single-phase grounding fault positioning system of distribution network |
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| CN201965197U true CN201965197U (en) | 2011-09-07 |
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| CN2011200976650U Expired - Fee Related CN201965197U (en) | 2011-04-06 | 2011-04-06 | Single-phase grounding fault positioning system of distribution network |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113765225A (en) * | 2021-09-08 | 2021-12-07 | 陕西省地方电力(集团)有限公司西安供电分公司 | Single-phase grounding alarm system and method for power distribution network |
-
2011
- 2011-04-06 CN CN2011200976650U patent/CN201965197U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113765225A (en) * | 2021-09-08 | 2021-12-07 | 陕西省地方电力(集团)有限公司西安供电分公司 | Single-phase grounding alarm system and method for power distribution network |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: THE HAILIN FIRE TO ELECTRICAL TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: QI YULIN Effective date: 20120326 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 071000 BAODING, HEBEI PROVINCE TO: 157112 MUDANJIANG, HEILONGJIANG PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20120326 Address after: Mudanjiang City, Heilongjiang Province, Xinhua District 157112 Hailin Municipal Committee of 27 Hailin fire group Patentee after: The Hailin Fire to Electrical Technology Co., Ltd. Address before: 22 mailbox, North China Electric Power University, Baoding, Hebei, Baoding 071000, China Patentee before: Qi Yulin |
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| 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: 20110907 Termination date: 20180406 |