CN101359823A - One-phase grounding hierarchical or integral wire-selective device for high-voltage grid - Google Patents
One-phase grounding hierarchical or integral wire-selective device for high-voltage grid Download PDFInfo
- Publication number
- CN101359823A CN101359823A CNA2008102119363A CN200810211936A CN101359823A CN 101359823 A CN101359823 A CN 101359823A CN A2008102119363 A CNA2008102119363 A CN A2008102119363A CN 200810211936 A CN200810211936 A CN 200810211936A CN 101359823 A CN101359823 A CN 101359823A
- Authority
- CN
- China
- Prior art keywords
- transformer substation
- transformer station
- line selection
- selection apparatus
- route selection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention relates to a high voltage earth protective device of an electric power system, in particular to a high voltage network single phase earth classification and integral route selection device. The device comprises a main transformer substation and branch transformer substations, communication devices connected with each other are arranged equally between route selection devices of the main transformer substation and each branch transformer substation, the route selection devices in each branch transformer substation is used cooperatively with the route selection device in the main transformer substation through communication devices; and the route selection devices in the main transformer substation and each branch transformer substation comprise a signal collection board, a signal converter, a main board, a display and a power panel. The route selection device can effectively distinguish the earth fault of each branch transformer substation from the earth fault of the main transformer substation, prevent false alarm from occurring in branch transformer substations, accurately select single phase earth fault, greatly improve processing efficiency of earth fault, reduce work intensity of power supply and maintenance personnel, improve operating rate of power supply system, and ensure safe operation of the power supply system.
Description
Technical field
The present invention relates to electric power system high-voltage earthing protection device, the classification of specifically a kind of high-voltage fence single-phase earthing, whole line selection apparatus.
Background technology
At present, in China's electric power system, 6～35KV electric power system generally adopts the small current neutral grounding mode, especially adopts through the system of grounding through arc mode in the majority.The effect of high-voltage earthing line selection apparatus is when electric power system generation single phase ground fault, correctly selects ground path, finds out fault point, rapidly removing faults fast with the personnel of maintaining easily.
Traditional high-voltage earthing line selection apparatus (being commonly called as Small Electric Current Earthing And Routing Device) falls one of transformer station's installing always usually, respectively installs one in each branch transformer station, and the line-selected earthing device that install each substation is separately independently, compartment.When earth fault takes place when, select the circuit in its transformer station separately, the enabling signal of its route selection simultaneously is the same (zero sequential potential transformer open three angle voltages), so when electric power system generation earth fault (a certain cable single-phase earthing), owing to be an electric power system (bus coexists), so always fall transformer station and each minute transformer station all satisfy the route selection entry condition, all start line selection apparatus work, but has only a cable grounding in the system, it is correct having only a line selection apparatus route selection at most, other route selection is falsely drops, so this line selection mode accuracy rate is quite low, in the user, visits and understand according to us, at present the electric power system of each transformer station of enterprise, the structure more complicated, and the route selection accuracy rate of line-selected earthing device is very low.How the correct earth fault line (especially branch transformer station) of selecting has become a great problem.
Summary of the invention
Design philosophy of the present invention is at the existing low defective of line selection apparatus accuracy rate, provides a kind of simple in structure, route selection high-voltage fence single-phase earthing classification accurately, whole line selection apparatus.
Realize the foregoing invention purpose by the following technical solutions: the classification of a kind of high-voltage fence single-phase earthing, whole line selection apparatus, comprise and always fall transformer station and branch transformer station, be equipped with interconnective communication device between the described line selection apparatus that always falls in transformer station and each minute transformer station, the line selection apparatus in each minute transformer station is used by this communication device and the line selection apparatus that always falls transformer station; The described line selection apparatus that always falls in transformer station and each minute transformer station comprises signal acquiring board, signal converter, mainboard, display and power panel.
This line selection apparatus can effectively reach the earth fault of always falling in the transformer station to the earth fault in each branch transformer station and differentiate, prevent that the phenomenon of false alarm from appearring in branch transformer station, select single phase ground fault exactly, can greatly improve the treatment effeciency of earth fault, alleviate power supply attendant's labour intensity, improve the running rate of electric power system, ensure the safe operation of electric power system.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention.
Fig. 2 is a classification line selection apparatus theory diagram of the present invention.
Among the figure: one-level line selection apparatus 1, communication device 2 divides line selection apparatus 3.
Embodiment
Below in conjunction with drawings and Examples in detail the present invention is described in detail.
Referring to accompanying drawing, in the present embodiment, described always falling between one-level line selection apparatus 1 in the transformer station and the classification line selection apparatus 2 in each minute transformer station all is equipped with interconnective communication device 3; And the line selection apparatus of one-level line selection apparatus 1 and classification line selection apparatus 3 inside, promptly data acquisition unit is made of signal acquiring board, signal transducer, mainboard, display and power panel.Wherein, the communication device in each classification line selection apparatus 3 is connected with the communication device that always falls the one-level line selection apparatus 1 in the transformer station.
The communication modes of the communication device 2 in this line selection apparatus comprises wire communication and wireless telecommunications, is convenient to the transmission cable data between the two.In the present embodiment, described communication device 2 adopts the RS485 communication modes.Signal acquiring board in the classification line selection apparatus 3 comprises current and potential transformer etc.; Signal transducer is that the signal of signal acquiring board collection is changed, and the analog signal conversion of gathering is become digital signal (A/D conversion); Mainboard adopts the design of 51 series monolithics, and chip functions is powerful, the performance maturation; Display panel adopts liquid crystal display, and adopts Chinese mode video data and parameter; Power panel adopts the high reliability power supply, for device provides required each grade DC power supply.
The method of carrying out route selection with line selection apparatus of the present invention has classification selection method and whole selection method, and its concrete using method is as follows:
One, classification selection method: circuit that transformer station directly feeds out will always fall as the one-level route selection, each minute transformer station circuit as the classification route selection.During electric power system generation single phase ground fault, at first always fall one-level line selection apparatus 1 work in the transformer station, its circuit that directly feeds out is carried out data acquisition and analysis, its data acquisition and processing (DAP) step is as follows:
1. signal acquiring board is gathered the zero sequence current signal at scene.
2. signal becomes the treatable digital signal of computer through the signal transducer treatment conversion.
3. these digital signals are sent to mainboard, these data are carried out analyzing and processing by mainboard.
When selected circuit is always to fall the cable line that transformer station directly feeds out, show ground path numbering and warning by display after then mainboard is handled field data.
When selected circuit is the inlet wire of the branch transformer station at some classification line selection apparatus 3 places, then one-level line selection apparatus 1 is given an order to this classification line selection apparatus 5 by communication modes, this classification line selection apparatus 3 carries out route selection according to above-mentioned steps 1-3, the display of circuit number in minute transformer station of selecting shown and warning, and by connected communication device 2 circuit number of selecting is sent to one-level line selection apparatus 1 simultaneously, after the one-level line selection apparatus 1 that always falls transformer station is received classification line selection apparatus 3 and sent the ground path signal of returning, show ground signalling and report to the police.
Other do not receive 3 no ground connection information demonstrations of classification line selection apparatus of always falling 1 order of transformer station's one-level line selection apparatus, do not report to the police yet.
Two, whole selection method:
During electric power system generation single phase ground fault, one-level line selection apparatus 1 work of transformer station is at first always fallen, order the data of the voltage capacitor of all cables in each classification line selection apparatus 3 its place transformer station of collection simultaneously by communication device 2, the method for its collection and transmission is with the step 1-3 of above-mentioned classification selection method.
The data that the classification line selection apparatus is gathered are sent to one-level line selection apparatus 1 by communication device 2, after one-level line selection apparatus 1 is received data, with itself place always fall capacitance current data in the transformer station and each classification line selection apparatus 3 transmit come up each minute transformer station data carry out analysis-by-synthesis together, thereby correctly select ground path.
If selected faulty line is always to fall the cable line that transformer station's one-level line selection apparatus 1 directly feeds out, rather than the inlet wire of the branch transformer station at each classification line selection apparatus 3 place then wire selection system determine that directly this faulty line promptly is a ground path, in time show the ground path numbering, and report to the police;
If selected circuit is the inlet wire of the branch transformer station at some classification line selection apparatus 3 places, then always fall the one-level line selection apparatus 1 of transformer station and give an order to this classification line selection apparatus 3 by communication device 2, classification line selection apparatus 5 is in time reported to the police and is shown the ground path numbering.
Other do not receive the classification line selection apparatus 5 that always falls 1 order of transformer station's line selection apparatus and then do not report to the police, and do not have ground connection information yet and show.
Claims (1)
1, a kind of high-voltage fence single-phase earthing classification, whole line selection apparatus, comprise and always fall transformer station and branch transformer station, it is characterized in that, be equipped with interconnective communication device between the described line selection apparatus that always falls in transformer station and each minute transformer station, the line selection apparatus in each minute transformer station is used by this communication device and the line selection apparatus that always falls transformer station; The described line selection apparatus that always falls in transformer station and each minute transformer station comprises signal acquiring board, signal converter, mainboard, display and power panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102119363A CN101359823A (en) | 2008-09-11 | 2008-09-11 | One-phase grounding hierarchical or integral wire-selective device for high-voltage grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102119363A CN101359823A (en) | 2008-09-11 | 2008-09-11 | One-phase grounding hierarchical or integral wire-selective device for high-voltage grid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101359823A true CN101359823A (en) | 2009-02-04 |
Family
ID=40332191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102119363A Pending CN101359823A (en) | 2008-09-11 | 2008-09-11 | One-phase grounding hierarchical or integral wire-selective device for high-voltage grid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101359823A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102279347A (en) * | 2011-06-28 | 2011-12-14 | 内蒙古电力勘测设计院 | Judgment of grounding fault line in multi-stage power supply network system |
| CN102944809A (en) * | 2012-12-04 | 2013-02-27 | 广东电网公司东莞供电局 | Method for rapidly identifying power grid fault |
| CN102981105A (en) * | 2012-12-25 | 2013-03-20 | 南京因泰莱电器股份有限公司 | Low current earth routing system based on CAN |
| CN105301448A (en) * | 2015-11-19 | 2016-02-03 | 天津大学 | Time synchronization method among small-current grounding devices of coal mine system |
-
2008
- 2008-09-11 CN CNA2008102119363A patent/CN101359823A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102279347A (en) * | 2011-06-28 | 2011-12-14 | 内蒙古电力勘测设计院 | Judgment of grounding fault line in multi-stage power supply network system |
| CN102279347B (en) * | 2011-06-28 | 2013-06-12 | 内蒙古电力勘测设计院 | Judgment of grounding fault line in multi-stage power supply network system |
| CN102944809A (en) * | 2012-12-04 | 2013-02-27 | 广东电网公司东莞供电局 | Method for rapidly identifying power grid fault |
| CN102944809B (en) * | 2012-12-04 | 2015-03-18 | 广东电网公司东莞供电局 | Method for rapidly identifying power grid fault |
| CN102981105A (en) * | 2012-12-25 | 2013-03-20 | 南京因泰莱电器股份有限公司 | Low current earth routing system based on CAN |
| CN102981105B (en) * | 2012-12-25 | 2015-12-23 | 南京因泰莱电器股份有限公司 | Based on the Little Current Ground Connection System of CAN network |
| CN105301448A (en) * | 2015-11-19 | 2016-02-03 | 天津大学 | Time synchronization method among small-current grounding devices of coal mine system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101738565B (en) | Adaptive fault indicator | |
| CN103336218B (en) | A kind of mixed power transmission line shorted to earth fault reclosing criterion system | |
| CN102386678A (en) | Fault positioning monitoring system for distribution network | |
| CN202189108U (en) | On-line monitoring device for high voltage shunt capacitor | |
| CN203811762U (en) | Gas insulated switchgear (GIS) partial discharge monitoring apparatus | |
| CN203012073U (en) | Power distribution network line fault positioning system | |
| CN201478809U (en) | Single-phase grounding line selection device for 20 kV power grid | |
| CN102540009A (en) | Fault locating system of power distribution network | |
| CN210038027U (en) | Comprehensive fault line selection device for power distribution system | |
| CN101359823A (en) | One-phase grounding hierarchical or integral wire-selective device for high-voltage grid | |
| CN101452632B (en) | Single-phase earth fault diagnostic equipment | |
| CN102735988A (en) | Distribution network single-phase ground fault positioning method | |
| CN202676797U (en) | Arc extinction resonance extinction and overvoltage protection device on-line monitoring system | |
| CN108051693A (en) | A kind of method of the raising earth fault judgment accuracy based on TAS devices | |
| CN202720281U (en) | On-line monitoring device for capacitive equipment of transformer substation | |
| CN202693731U (en) | Middling pressure power grid fault wave recording and intelligent integrated diagnosis processing apparatus | |
| CN201234125Y (en) | Single-phase grounding failure automatic processing equipment for low current grounding system | |
| CN201252399Y (en) | Main and branch route selection device with grounding single phases in high-voltage power network | |
| CN105203947A (en) | Performance characteristic testing method of high-voltage circuit breaker | |
| CN201780321U (en) | Multifunctional electricity-fault recording device | |
| CN106841920B (en) | The judgement of distribution line real time fail and Fault Locating Method | |
| CN104931859A (en) | Fault monitoring device based on distributed wave recording | |
| CN105092947A (en) | Three-phase circuit overvoltage monitoring system and method thereof | |
| CN202041612U (en) | Automatic locating device for earth faults of electricity transmission lines | |
| CN105277825B (en) | A kind of relay protection action failure analytical equipment and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090204 |