CN101246199A - Method and device for wirelessly detecting grounded screen fault - Google Patents
Method and device for wirelessly detecting grounded screen fault Download PDFInfo
- Publication number
- CN101246199A CN101246199A CNA2007100802233A CN200710080223A CN101246199A CN 101246199 A CN101246199 A CN 101246199A CN A2007100802233 A CNA2007100802233 A CN A2007100802233A CN 200710080223 A CN200710080223 A CN 200710080223A CN 101246199 A CN101246199 A CN 101246199A
- Authority
- CN
- China
- Prior art keywords
- grounded screen
- potential
- current
- equipment
- signal
- 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
Abstract
The invention discloses a method for wireless testing grounding grid fault and the test device. The method has the following steps: first drawing the device plane arrangement chart of the tested grounding grid area, establishing grounding grid system database; installing potential test device on grounding down-lead of every device of grounding grid, installing current collecting device on down-lead of high level architecture; separately collecting potential and current of every test dots of grounding grid when the grounding grid is given signal or not, obtaining potential and current distributing graph of every corresponding dot of grounding grid, in order to obtain analyzing result from the data. The device of the invention is site assembled apparatus composed of controllable signal generator, potential test device, current collecting device, signal receiving device and computer. The merits of the device reside in that: in available region of wireless signal, it can test and analyze test dot in every installation device quickly, which saves a large amount of complicated connection labors and improves test precision and working efficiecy.
Description
Technical field:
The present invention relates to a kind of detection method and pick-up unit of grounded screen working condition, be specially adapted to fault detect generating plant, transformer station or other large-scale grounding network.
Background technology:
At present, in electric power, large-scale factories and miness, communal facility, various device and buildings all must carry out good ground connection by grounded screen in operation is used, with assurance equipment, buildings, operations staff's safety, so the safety detection of ground networks is indispensable important process in production and the life.In generating plant and transformer station; grounded screen is the high-low-voltage electrical equipment of current collection power system and the working earthing of relay protection and aut.eq.; protective ground; lightning protection electrical ground; anti static grounding; four big functions are in the system earth network of one; be to guarantee one of electric device that safe operation of power system is important; therefore; it is an indispensable job that grounded screen detects; now detection method of Cai Yonging and device have: HDZ-2000 generating plant large-scale substation earthing device characterisitic parameter measuring system (patent No. 99253999.4); by adopting the big electric current of class power frequency as the measuring-signal that injects grounded screen, pointwise measures parameters needed.The patent No. is the patent of 200510012656.6 generating plant, transformer station's large-scale grounding network detection technique and detection system thereof, a kind of detection method and device that utilizes computing machine to carry out grounded screen also proposed, this method also will detect by difference being carried out on line, after obtaining lot of data, be plotted on the earth potential figure, obtain the operating mode of grounded screen.
The present invention has designed new detection method and has had the detection current potential device of wireless transmit function, and will detect current potential and send by the mode that wireless channel sends, and supplies receiving trap acceptance and detects identification, has changed traditional detection method and checkout equipment.
Summary of the invention:
The method and the pick-up unit that the purpose of this invention is to provide a kind of radio detection grounded screen fault, by adopting wireless transmission and radio receiver to obtain the signal of tested measuring point, by computing machine the signal of gathering is handled, reached the purpose that grounded screen is detected.
In order to achieve the above object, taked following detection method, the first step, equipment floor plan according to detected grounded screen zone, utilize computer drawing to go out floor plan and high framework equipment ground 3 dimensional drawing with the corresponding major equipment of arrangenent diagram, and the tested equipment of surveyed area is numbered, the drawing that will have numbering is stored in the pick-up unit, sets up grounded screen detection system database; Second step, on the ground lead of every equipment of detected grounded screen, a potential detection device is installed, the positive pole of each potential detection device is connected on the ground lead of equipment, and negative pole is connected with the common ground line of setting up specially; In the 3rd step, on high framework equipment ground line, current collecting device is installed; The 4th step, select the detection signal access point of grounded screen, to transformer station, positive pole is defined as that the circuit aerial earth wire is gone into the place or on the ground wire of main-transformer equipment relatively far away, negative pole is defined as on the neutral ground line of main-transformer, to other grounded screen, the earth point of two main equipments that select certain distance is as the detection signal access point; The 5th step, when collection grounded screen does not apply signal, the Potential distribution of each check point when promptly grounded screen is normally moved, and preserve; The 6th one, apply a low-voltage, big current signal by the controllable signal generator to grounded screen, terminal voltage, the electric current of the output of pick-up unit acquired signal source, gather the potential value of each potential detection device and the current value of current collecting device, and be labeled in the corresponding point of equipment floor plan, obtain current potential, the current distributing figure of tested each corresponding point of grounded screen; The 7th step, fault analysis, in the current potential of grounded screen, current distributing figure, potential jump point, current potential peak zone, minimum point zone can be judged as the in-problem position of grounded screen.
The battery limits floor plan in detected grounded screen zone is an important evidence of determining check point, draw according to the design working drawing of actual factory, the electrical equipment of standing, and also will consider the important connecting portion of grounded screen.
For realizing the inventive method, specialized designs a kind of grounded screen wireless detection device, device is by controllable signal generator (1), potential detection device (2), current collecting device (3), signal receiving device (4), computing machine (5) amounts to 5 main devices and constitutes, when assembled on site is used, the common ground line that employing is set up specially links together the negative pole of each field erected potential detection device (2) and ground connection, the current channel of forming a wired connection, current collecting device (3) is installed on the ground wire of high framework equipment, be provided with the wireless signal sense channel between each potential detection device (2) and each current collecting device (3) and the signal receiving device (4), constitute combined type grounded screen wireless detection device.
The structure of several chief components of grounded screen wireless detection device is: controllable signal generator (1) is constituted by computer control (6), isolating transformer (7), current regulator (8) and output signal pick-up unit (9).Potential detection device (2) is constituted by sampling A (10), storer (11), CPU (12), accumulator (13), communication management chip (14).Signal receiving device (4) is constituted by communication management chip (15), CPU (16), communication conversion chip (17).
New detection method and pick-up unit are compared with device with the existing technical method that extensively adopts owing to adopted the radio detection technology, have saved numerous and diverse work, can detect needed check point in the radio channel effective range easily.
Description of drawings:
Fig. 1 is a grounded screen wireless detection device structural drawing.In the drawings, the controllable signal generator is (1), potential detection device (2), current collecting device (3), signal receiving device (4), computing machine (5).
Fig. 2 is controllable signal generator architecture figure.In the drawings, computer control is (6), isolating transformer (7), current regulator (8) and output signal pick-up unit (9).
Fig. 3 is the potential detection device structural drawing.In the drawings, sampling A is (10), storer (11), CPU (12), accumulator (13), communication management chip (14).
Fig. 4 is the signal receiving device structural drawing.In the drawings, the communication management chip is (15), CPU (16), communication conversion chip (17).
Embodiment:
Below in conjunction with accompanying drawing specific implementation method of the present invention is described in further detail.
Utilize this method to carry out the fault detect of grounded screen, it is very important drawing the equipment floor plan in grounded screen zone and selecting check point, with the transformer station is example, draw according to the design working drawing of the electrical equipment of actual transformer station, also will consider the important connecting portion of grounded screen; When detecting, at first to utilize computer drawing to go out the grounded screen areal map, and the floor plan and the high framework equipment ground 3 dimensional drawing of the major equipment of the interior correspondence in zone, for the check and analysis convenience, also to be numbered tested equipment, the drawing that will have numbering is stored in the pick-up unit, sets up a management database that detects the grounded screen system.Second step, on the ground lead of every equipment of detected grounded screen, a potential detection device (2) is installed, referring to Fig. 1, the positive pole of each potential detection device is connected on the ground lead of equipment, negative pole is connected with the common ground line of setting up specially, forms one and has good earth Performance Detection grounding circuit.The 3rd step, on high framework equipment ground line, current collecting device (3) is installed, the signals collecting end of current collecting device is a pincers type reometer, ground wire will pass pincers type reometer.The 4th step, select the detection signal access point of grounded screen, to transformer station, positive pole is defined as that the circuit aerial earth wire is gone into the place or on the ground wire of main-transformer equipment relatively far away, negative pole is defined as the neutral ground line of main-transformer, to other grounded screen, the earth point of two main equipments that select certain distance is as the detection signal access point.The 5th step, measure, when collection grounded screen does not apply signal, the Potential distribution of each check point when promptly grounded screen is normally moved, and preserve.
The 6th step, apply a low-voltage, big current signal by the controllable signal generator to grounded screen, terminal voltage, the electric current of the output of pick-up unit acquired signal source, gather the potential value of each potential detection device and the current value of current collecting device, and be labeled in the corresponding point of equipment floor plan, obtain current potential, the current distributing figure of tested each corresponding point of grounded screen.The 7th step, testing result is analyzed, the current value of the current collecting device of installing on each high framework should be zero, in the current potential of grounded screen, current distributing figure, potential jump point, current potential peak zone, minimum point zone, can be judged as the in-problem position of grounded screen, need further analyze, differentiate by change input detection voltage, electric current.
Embodiment detects in transformer station: open the grounded screen wireless detection device, do not apply measuring-signal to grounded screen, the Potential distribution of each check point when collection grounded screen is normally moved, gather the current value of the current collecting device of installing on the high framework, obtain voltage distribution plan, the current distributing figure of grounding net of transformer substation.Testing result is analyzed: to the earth-free transformer station of neutral point, all high-tension apparatus ground wire current potentials all should be zero potential, the current value of the current collecting device of installing on the high framework all is zero, high-tension apparatus ground wire appearance potential, then can be considered this equipment ground existing problems.To the transformer station of neutral ground, the sudden change that do not have of the current potential of all adjacent high-tension apparatus ground wires, the sudden change of high-tension apparatus ground wire appearance potential then can be considered this equipment ground existing problems; Carry out the testing and the analysis in above-mentioned the 6th step.
The grounded screen wireless detection device is one and passes through the on-the-spot spendable composite set in combination rear of installing, by Fig. 1 grounded screen wireless detection device structural drawing as seen, in 5 main devices of composite set, the installation of potential detection device (2) is the most complicated, at each check point, all need to install a potential detection device, and the common ground line of must employing setting up specially links together the negative pole of all field erected each potential detection devices (2) and ground connection reliably.Current collecting device (3) is installed on the ground wire of high framework equipment, and current collecting device (3) does not provide concrete picture, and the difference of it and potential detection device (2) is that acquired signal partly is the pincers type reometer of a routine.
By Fig. 2 controllable signal generator architecture figure as seen, controllable signal generator (1) be input as three-phase supply, being output as single phase poaer supply, is a power supply that passes through computer-controlled routine by computer control (6), isolating transformer (7) and current regulator (8) combination; Be connected to an output signal pick-up unit (9) at output terminal, be used for providing detection signal to the computer control end.
By Fig. 3 potential detection device structural drawing as seen, device is constituted by sampling A (10), storer (11), CPU (12), accumulator (13), communication management chip (14).Sampling A can be selected CS5460A for use, and the input of sampling A is joined by the terminal of a transformer and acquired signal, and CPU is given in its output (12), and CPU can select P89C668HFA for use, and other each parts all can be selected conventional element for use.
By Fig. 4 signal receiving device structural drawing as seen, device is delivered to communication management chip (15) by antenna receiving signal, successively through, CPU (16), communication conversion chip (17) to computing machine, carry out signal Processing.
Elements such as selected electric, the electronics of apparatus of the present invention, electrical equipment connection all select for use the components and parts of international standard to assemble, and select non-singularity, and its wiring is carried out by element requirements, so to components and parts and annexation detailed description.
Claims (6)
1. the method for a radio detection grounded screen fault, with computing machine as detecting control center, it is characterized in that: detect according to the following steps and implement, the first step, according to the equipment floor plan in detected grounded screen zone, utilize computer drawing to go out floor plan and high framework equipment ground 3 dimensional drawing with the corresponding major equipment of arrangenent diagram, and the tested equipment of surveyed area is numbered, the drawing that will have numbering is stored in the pick-up unit, sets up grounded screen detection system database; Second step, on every equipment ground lead-in wire of detected grounded screen, a potential detection device is installed, the positive pole of each potential detection device is connected on the ground lead of equipment, and negative pole is connected with the common ground line of setting up specially; In the 3rd step, on high framework equipment ground line, current collecting device is installed; The 4th step, select the detection signal access point of grounded screen, to transformer station, positive pole is defined as that the circuit aerial earth wire is gone into the place or on the ground wire of main-transformer equipment relatively far away, negative pole is defined as on the neutral ground line of main-transformer, to other grounded screen, the earth point of two main equipments that select certain distance is as the detection signal access point; The 5th step, gather grounded screen and do not apply signal, when promptly grounded screen is normally moved, the Potential distribution of each check point, and preserve; The 6th step, apply a low-voltage, big current signal by the controllable signal generator to grounded screen, terminal voltage, the electric current of the output of pick-up unit acquired signal source, gather the potential value of each potential detection device and the current value of current collecting device, and be labeled in the corresponding point of equipment floor plan, obtain current potential, the current distributing figure of tested each corresponding point of grounded screen; The 7th step, fault analysis, in the current potential of grounded screen, current distributing figure, potential jump point, current potential peak zone, minimum point zone can be judged as the in-problem position of grounded screen.
2. the method for radio detection grounded screen fault according to claim 1, it is characterized in that: the battery limits floor plan in described detection grounded screen zone, to draw according to the design working drawing of actual factory, the electrical equipment of standing, also will consider the important connecting portion of grounded screen.
3. grounded screen wireless detection device for realizing that the described method of claim 1 designs, it is characterized in that: device is by controllable signal generator (1), potential detection device (2), current collecting device (3), signal receiving device (4), computing machine (5) constitutes, when assembled on site is used, the common ground line that employing is set up specially is connected together the negative pole of all field erected potential detection devices (2) and ground connection, the current channel of forming a wired connection, current collecting device (3) is installed on the ground wire of high framework equipment, be provided with the wireless signal sense channel between each potential detection device (2) and each current collecting device (3) and the signal receiving device (4), constitute combined type grounded screen wireless detection device.
4. grounded screen wireless detection device according to claim 3 is characterized in that: controllable signal generator (1) is constituted by computer control (6), isolating transformer (7), current regulator (8) and output signal pick-up unit (9).
5. grounded screen wireless detection device according to claim 3 is characterized in that: potential detection device (2) is constituted by sampling A (10), storer (11), CPU (12), accumulator (13), communication management chip (14).
6. grounded screen wireless detection device according to claim 3 is characterized in that: signal receiving device (4) is constituted by communication management chip (15), CPU (16), communication conversion chip (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100802233A CN101246199A (en) | 2007-02-14 | 2007-02-14 | Method and device for wirelessly detecting grounded screen fault |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100802233A CN101246199A (en) | 2007-02-14 | 2007-02-14 | Method and device for wirelessly detecting grounded screen fault |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101246199A true CN101246199A (en) | 2008-08-20 |
Family
ID=39946769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100802233A Pending CN101246199A (en) | 2007-02-14 | 2007-02-14 | Method and device for wirelessly detecting grounded screen fault |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101246199A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102184622A (en) * | 2011-01-24 | 2011-09-14 | 武汉奋进电力技术有限公司 | System for monitoring grounding wire state in substation |
| CN102332707A (en) * | 2011-06-08 | 2012-01-25 | 高政 | Earth fault signal measuring method and protective device for ungrounded system |
| CN102707167A (en) * | 2012-05-18 | 2012-10-03 | 华中科技大学 | State monitoring system for grounding grid based on industrial personal computer |
| CN103235168A (en) * | 2013-03-26 | 2013-08-07 | 上海大帆电气设备有限公司 | Measuring system for shunt vectors of metal frames of large ground grids on basis of wireless transmission |
| CN103616616A (en) * | 2013-12-09 | 2014-03-05 | 石家庄弘耀能源科技有限公司 | Fault detection method for large-scale grounding grid |
| CN104820144A (en) * | 2015-04-17 | 2015-08-05 | 国家电网公司 | Resistance reduction analysis and measure system applied to transformer station lightning-proof grounding system |
| CN106597221A (en) * | 2016-12-15 | 2017-04-26 | 中国科学院沈阳自动化研究所 | Ground grid fault diagnosis method and system |
| CN106950456A (en) * | 2017-05-26 | 2017-07-14 | 云南电网有限责任公司电力科学研究院 | A kind of grounding net of transformer substation performance estimating method tested based on man-made short-circuit |
| CN107132455A (en) * | 2017-05-26 | 2017-09-05 | 云南电网有限责任公司电力科学研究院 | A kind of grounding net of transformer substation performance estimating method injected based on ground line current |
| CN108174594A (en) * | 2018-01-10 | 2018-06-15 | 信息产业电子第十设计研究院科技工程股份有限公司 | It is a kind of based on high voltage, heavy-current discharge under the conditions of solve electromagnetic shielding and ionization radiation protection electrical system |
| CN110082633A (en) * | 2019-04-23 | 2019-08-02 | 史磊 | A kind of grounding net of transformer substation on-line monitoring system and method |
| CN112147464A (en) * | 2020-09-27 | 2020-12-29 | 云南电网有限责任公司红河供电局 | Device for testing earth surface potential gradient distribution of transformer substation grounding grid |
-
2007
- 2007-02-14 CN CNA2007100802233A patent/CN101246199A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102184622A (en) * | 2011-01-24 | 2011-09-14 | 武汉奋进电力技术有限公司 | System for monitoring grounding wire state in substation |
| CN102332707A (en) * | 2011-06-08 | 2012-01-25 | 高政 | Earth fault signal measuring method and protective device for ungrounded system |
| CN102332707B (en) * | 2011-06-08 | 2014-04-16 | 高政 | Earth fault signal measuring method and protective device for ungrounded system |
| CN102707167A (en) * | 2012-05-18 | 2012-10-03 | 华中科技大学 | State monitoring system for grounding grid based on industrial personal computer |
| CN102707167B (en) * | 2012-05-18 | 2015-04-15 | 华中科技大学 | State monitoring system for grounding grid based on industrial personal computer |
| CN103235168A (en) * | 2013-03-26 | 2013-08-07 | 上海大帆电气设备有限公司 | Measuring system for shunt vectors of metal frames of large ground grids on basis of wireless transmission |
| CN103235168B (en) * | 2013-03-26 | 2015-03-25 | 上海大帆电气设备有限公司 | Measuring system for shunt vectors of metal frames of large ground grids on basis of wireless transmission |
| CN103616616B (en) * | 2013-12-09 | 2017-02-08 | 河北弘耀新能源科技有限公司 | Fault detection method for large-scale grounding grid |
| CN103616616A (en) * | 2013-12-09 | 2014-03-05 | 石家庄弘耀能源科技有限公司 | Fault detection method for large-scale grounding grid |
| CN104820144A (en) * | 2015-04-17 | 2015-08-05 | 国家电网公司 | Resistance reduction analysis and measure system applied to transformer station lightning-proof grounding system |
| CN106597221A (en) * | 2016-12-15 | 2017-04-26 | 中国科学院沈阳自动化研究所 | Ground grid fault diagnosis method and system |
| CN106950456A (en) * | 2017-05-26 | 2017-07-14 | 云南电网有限责任公司电力科学研究院 | A kind of grounding net of transformer substation performance estimating method tested based on man-made short-circuit |
| CN107132455A (en) * | 2017-05-26 | 2017-09-05 | 云南电网有限责任公司电力科学研究院 | A kind of grounding net of transformer substation performance estimating method injected based on ground line current |
| CN107132455B (en) * | 2017-05-26 | 2019-07-05 | 云南电网有限责任公司电力科学研究院 | A kind of grounding net of transformer substation performance estimating method based on ground line current injection |
| CN106950456B (en) * | 2017-05-26 | 2019-07-26 | 云南电网有限责任公司电力科学研究院 | A kind of grounding net of transformer substation performance estimating method based on man-made short-circuit's experiment |
| CN108174594A (en) * | 2018-01-10 | 2018-06-15 | 信息产业电子第十设计研究院科技工程股份有限公司 | It is a kind of based on high voltage, heavy-current discharge under the conditions of solve electromagnetic shielding and ionization radiation protection electrical system |
| CN110082633A (en) * | 2019-04-23 | 2019-08-02 | 史磊 | A kind of grounding net of transformer substation on-line monitoring system and method |
| CN112147464A (en) * | 2020-09-27 | 2020-12-29 | 云南电网有限责任公司红河供电局 | Device for testing earth surface potential gradient distribution of transformer substation grounding grid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101246199A (en) | Method and device for wirelessly detecting grounded screen fault | |
| CN103293443B (en) | A kind of distribution network overhead line Earth design method | |
| CN102937675B (en) | The method of work of Real-time Electrical Distribution Network Data collection and fault location system | |
| CN105467241B (en) | A kind of distribution converter transformer DC magnetic bias detecting system and its detection method | |
| CN103323647B (en) | Graded insulation Electromagnetic PT primary side current monitoring device and method | |
| CN102707195A (en) | Oscilloscope fault analysis platform and establishment method thereof | |
| CN107478909A (en) | A kind of smart grounding resistance on-line computing model and its system | |
| CN105652098A (en) | Ground resistance detection and analysis system adopting solar energy to supply power | |
| CN103605047B (en) | A kind of telegram in reply monitoring system and method | |
| CN105182074B (en) | Intelligent grid network unifies phasing system | |
| CN201449423U (en) | Test device for DC withstand voltage test of multi-stage zinc oxide arresters | |
| CN103675569B (en) | The detection Apparatus and system of aerial line ground fault | |
| CN104865471A (en) | Low voltage live-line cable pair check meter | |
| CN111707913A (en) | Partial discharge detection device of power switch cabinet | |
| CN104122482A (en) | System and method of line recognition adopting power line carrier communication | |
| CN203376375U (en) | Graded insulation electromagnetic type PT primary side current monitoring device | |
| CN102879657A (en) | Method for checking phase sequences of lines | |
| CN104914314A (en) | Circuit layout and error correction system used for measuring grounding impedance | |
| CN210803587U (en) | Online ground resistance in-situ detection terminal | |
| CN202661563U (en) | Oscillograph fault analysis platform | |
| CN104076259A (en) | Device for detecting pollution flashover of insulator on transmission line in real time | |
| CN201035712Y (en) | Grounded network wireless testing apparatus | |
| CN210294386U (en) | Intelligent electroscope based on voice control | |
| CN105629075A (en) | Grounding resistance detection system with automatic detection function | |
| CN112698579A (en) | Portable pole-mounted switch controller field test device 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: 20080820 |