CN202041559U - Signal source equipment for power transmission line grounding fault automatic positioning device - Google Patents
Signal source equipment for power transmission line grounding fault automatic positioning device Download PDFInfo
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- CN202041559U CN202041559U CN2011201213651U CN201120121365U CN202041559U CN 202041559 U CN202041559 U CN 202041559U CN 2011201213651 U CN2011201213651 U CN 2011201213651U CN 201120121365 U CN201120121365 U CN 201120121365U CN 202041559 U CN202041559 U CN 202041559U
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- signal source
- transmission line
- source equipment
- electricity
- automatic positioning
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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
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Abstract
The utility model relates to signal source equipment for a power transmission line grounding fault automatic positioning device, wherein the positioning device comprises the signal source equipment connected at the side of a main transformer bus, and a plurality of fault displays which are respectively hung on the each-phase bus at each node of each power transmission line, the signal source equipment comprises a resistor box, a voltage sensor connected between the neutral point of the main transformer bus and the ground, and a controller connected with the voltage sensor, the resistor box comprises a switch and a plurality of high voltage resistors, and the switch and the high voltage resistances are sequentially connected between the neutral point of the main transmission bus and the ground in series. The signal source equipment and the power system operation are not interfered with each other; in addition, the signal source equipment is free from the influence of environment, can cover the whole line, and has sensitive reaction on a line fault, so that the potential safety hazard of the line caused by a missed fault or delayed detection can be avoided, and the power transmission line grounding fault automatic positioning device is ensured to work reliably.
Description
Technical field
The utility model relates to a kind of signal source equipment that is used for the transmission lines earth fault automatic positioning equipment.
Background technology
As everyone knows, because the influence of disaster or other factors, transmission line of electricity suffers damage unavoidably and earth fault occurs, earth fault occurs especially easily on middle and high pressure overhead transmission line, and wherein modal fault is the overhead transmission line single-phase earthing.For this type of fault, the maintainer generally is the position of distinguishing the earth point of earth fault by the voltage of detection line; When seeking earth point, can arrange personnel to check along the line for short overhead transmission line comprehensively; But when seeking earth point for long overhead transmission line, should adopt optimum seeking method to carry out, promptly at first the strain insulator bar at 1/2 place of line length carries out segmentation, take the drainage thread of circuit three-phase respectively apart, make whole circuit be divided into two sections, measure the insulation resistance of three-phase conducting wire then respectively with the 2500V megohmmeter, can distinguish certain section ground connection or two sections equal ground connection of circuit according to measurement result, secondly continue segment lookup according to judged result, progressively dwindle seek scope, treat that the ground connection scope narrows down to a certain degree, can arrange personnel to check along the line comprehensively.
Yet no matter above-mentioned is comprehensive inspection technique, or optimum seeking method, all needs the maintainer to expend a large amount of time and efforts, and work efficiency is extremely low.Therefore, the insider has researched and developed a kind of line fault automatic positioning equipment to address the above problem.The principle of work of this line fault automatic positioning equipment is when transmission line of electricity generation singlephase earth fault, feed back a fault-signal by signal source equipment to transmission line of electricity, and, respond to this signal, thereby reach the purpose of fault detect and location by being installed in the fault detector on the pole line.
Though above-mentioned signal source equipment of the prior art has universality and anti-interference preferably, ubiquity is not good or to through the not good problem of arc suppression coil earthing system reaction to the reaction of the resistive earth fault of height.In view of the foregoing, press for the supporting signal source equipment of research and development a kind of and this type of automatic trouble locating arrangement now to satisfy its job requirement.
The utility model content
In order to solve the problem that above-mentioned prior art exists, the utility model aims to provide a kind of signal source equipment that is used for the transmission lines earth fault automatic positioning equipment, with the real-time detection of effective realization transmission lines earth fault.
A kind of signal source equipment that is used for the transmission lines earth fault automatic positioning equipment described in the utility model, described transmission line of electricity is connected transforming plant main transformer depressor outlet side, every transmission line of electricity is made of the three-phase bus, and every transmission line of electricity is provided with plurality of nodes, described locating device comprises that one is connected the signal source equipment of described main-transformer bus bar side, several are articulated in the fault detector on every phase bus at each node place of described every transmission line of electricity respectively, several are separately positioned on the built on stilts substation and a system of information processing centre at each node place of described every transmission line of electricity, described signal source equipment comprises a resistance box, one is connected the voltage sensor and a controller that is connected with this voltage sensor between described main-transformer bus neutral point and the ground, wherein, described resistance box comprises a switch and several high-tension resistives that are connected on successively between described main-transformer bus neutral point and the ground, and this switch receives a control signal of described controller output, and feeds back a pulsating current signal to described main-transformer bus bar side.
At the above-mentioned signal source equipment that is used for the transmission lines earth fault automatic positioning equipment, described resistance box also comprises the casing that is used to be provided with described switch and several high-tension resistives.
Owing to adopted above-mentioned technical solution, when the utility model utilization a singlephase earth fault occurs when transmission line of electricity, the principle of offset voltage can appear in main-transformer bus neutral point, by voltage sensor this offset voltage signal is passed to controller, and make this controller according to offset voltage, send to switch close, the separating brake control signal, with to the bigger pulsating current signal of main-transformer bus bar side feedback one, thereby realized real-time detection to transmission lines earth fault.The operation of the utility model and electric system is not disturbed mutually and is not affected by environment, can cover circuit completely, and because the active current component that neutral resistance is introduced can be surveyed really, so the utility model being quick on the draw to line fault, thereby avoided residual error or detected the line security hidden danger that time-delay is brought, guaranteed the reliably working of transmission lines earth fault automatic positioning equipment.
Description of drawings
Fig. 1 is a kind of fundamental diagram that is used for the signal source equipment of transmission lines earth fault automatic positioning equipment of the utility model;
Fig. 2 is a kind of structural representation that is used for the signal source equipment resistance box of transmission lines earth fault automatic positioning equipment of the utility model the utility model;
Fig. 3 is a kind of scheme of installation that is used for the signal source equipment of transmission lines earth fault automatic positioning equipment of the utility model.
Embodiment
Below in conjunction with accompanying drawing, specific embodiment of the utility model is elaborated.
See also Fig. 1 to Fig. 3, transmission line of electricity 6 is connected transforming plant main transformer depressor 5 outlet sides, and every transmission line of electricity 6 is made of the three-phase bus, and every transmission line of electricity 6 is provided with plurality of nodes.The transmission lines earth fault automatic positioning equipment comprises the fault detector 2 on every phase bus at a signal source equipment 1 that is connected main-transformer 5 bus bar side, several each node places that is articulated in every transmission line of electricity 6 respectively, the built on stilts substation 3 and a system of information processing centre 4 at several each node places that is separately positioned on every transmission line of electricity 6.
The utility model; it is a kind of signal source equipment 1 that is used for the transmission lines earth fault automatic positioning equipment; it comprises a resistance box 11; one is connected the voltage sensor 12 and a controller 13 that is connected with voltage sensor 12 between main-transformer 5 bus neutral points 50 and the ground; wherein; resistance box 11 comprises a casing 113; be arranged in the casing 113 and be connected on a switch 111 between main-transformer 5 bus neutral points 50 and the ground successively and several high-tension resistives 112 and one are arranged on protective earthing device 114 in the casing 113; and switch 111 receives a control signal of controller 13 outputs, and feeds back a pulsating current signal to main-transformer 5 bus bar side.
Principle of work of the present utility model is as follows:
When a singlephase earth fault appears in transmission line of electricity 6, offset voltage can appear in main-transformer 5 bus neutral points 50, when controller 13 detects this offset voltage greater than a setting value (this setting value is preset in controller 13 inside) by voltage sensor 12, and after having kept the regular hour, then controller 13 is according to offset voltage, drop into resistance box 11, send to switch 111 and to close, the separating brake control signal, thereby make main-transformer 5 bus neutral points 50 wave band ground insert a middle resistance in short-term, and make switch 111 in a period of time under the effect of residual voltage, can feed back a bigger pulsating current signal (i.e. a group coding ground current pulse) to main-transformer 5 bus bar side, so far finish real-time detection to line fault, then by fault detector 2 these pulsating current signals of induction, to realize location to faulty line, by built on stilts substation 3 detected failure message is sent to operations staff's mobile phone or watch-dog at last via system of information processing centre 4, thereby make the operations staff can be timely, grasp the security situation of transmission line of electricity exactly, save the repairing time, increase work efficiency.
The size of above-mentioned current impulse depends on the stake resistance of bus neutral point 50 neutral points, be the number (number of present embodiment mesohigh resistance 112 is 4) and the resistance of high-tension resistive 112, if it is too low that resistance is got, ground current will be bigger, and the interference to communication line will be bigger thus; Too big, can have influence on reliability of operation again but if resistance is got.Therefore, the expection of ground current size is depended in the selection of the size of resistance, and the big I of ground current decides in the ratio of transmission line of electricity 6 contained cables; Generally speaking, when transmission line of electricity 6 contained cable ratio＜80%, ground current was 100～200A, and then total resistance of high-tension resistive 112 should be 28.80～57.74 Ω; When transmission line of electricity 6 contained cable ratio 〉=80%, ground current was 500～600A, and then total resistance of high-tension resistive 112 should be 7.2～14.4 Ω; In addition, in the resistance box 11 except high-tension resistive 112 ground connection to form the loop, it is charged to prevent metal cabinet 113 also to be provided with protective earthing device 114, avoids causing casualty accident.
In the present embodiment, what controller 13 adopted is that the model that Shanghai Fei Kete Electric Applicance Co., Ltd produces is the product of RC2000F.
Below embodiment has been described in detail the utility model in conjunction with the accompanying drawings, and those skilled in the art can make the many variations example to the utility model according to the above description.Thereby some details among the embodiment should not constitute qualification of the present utility model, and the scope that the utility model will define with appended claims is as protection domain of the present utility model.
Claims (2)
1. signal source equipment that is used for the transmission lines earth fault automatic positioning equipment, described transmission line of electricity is connected transforming plant main transformer depressor outlet side, every transmission line of electricity is made of the three-phase bus, and every transmission line of electricity is provided with plurality of nodes, described locating device comprises that one is connected the signal source equipment of described main-transformer bus bar side, several are articulated in the fault detector on every phase bus at each node place of described every transmission line of electricity respectively, several are separately positioned on the built on stilts substation and a system of information processing centre at each node place of described every transmission line of electricity, it is characterized in that, described signal source equipment comprises a resistance box, one is connected the voltage sensor and a controller that is connected with this voltage sensor between described main-transformer bus neutral point and the ground, wherein, described resistance box comprises a switch and several high-tension resistives that are connected on successively between described main-transformer bus neutral point and the ground, and this switch receives a control signal of described controller output, and feeds back a pulsating current signal to described main-transformer bus bar side.
2. the signal source equipment that is used for the transmission lines earth fault automatic positioning equipment according to claim 1 is characterized in that, described resistance box also comprises the casing that is used to be provided with described switch and several high-tension resistives.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201213651U CN202041559U (en) | 2011-04-22 | 2011-04-22 | Signal source equipment for power transmission line grounding fault automatic positioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201213651U CN202041559U (en) | 2011-04-22 | 2011-04-22 | Signal source equipment for power transmission line grounding fault automatic positioning device |
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| Publication Number | Publication Date |
|---|---|
| CN202041559U true CN202041559U (en) | 2011-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201213651U Expired - Fee Related CN202041559U (en) | 2011-04-22 | 2011-04-22 | Signal source equipment for power transmission line grounding fault automatic positioning device |
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| CN (1) | CN202041559U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749486A (en) * | 2011-04-22 | 2012-10-24 | 上海市电力公司 | Signal source equipment used for automatic positioning device of transmission line ground fault |
| CN103245884A (en) * | 2013-04-27 | 2013-08-14 | 国家电网公司 | Medium and low voltage failure judgment method based on trouble call management system |
| CN112379220A (en) * | 2020-10-27 | 2021-02-19 | 云南电网有限责任公司临沧供电局 | Ground fault positioning system and method based on distribution transformer injection pulse |
-
2011
- 2011-04-22 CN CN2011201213651U patent/CN202041559U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749486A (en) * | 2011-04-22 | 2012-10-24 | 上海市电力公司 | Signal source equipment used for automatic positioning device of transmission line ground fault |
| CN103245884A (en) * | 2013-04-27 | 2013-08-14 | 国家电网公司 | Medium and low voltage failure judgment method based on trouble call management system |
| CN112379220A (en) * | 2020-10-27 | 2021-02-19 | 云南电网有限责任公司临沧供电局 | Ground fault positioning system and method based on distribution transformer injection pulse |
| CN112379220B (en) * | 2020-10-27 | 2021-10-01 | 云南电网有限责任公司临沧供电局 | Ground fault positioning system and method based on distribution transformer injection pulse |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111116 Termination date: 20200422 |
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| CF01 | Termination of patent right due to non-payment of annual fee |