CN2869879Y - Intelligent fault line-selection and positioning system - Google Patents
Intelligent fault line-selection and positioning system Download PDFInfo
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- CN2869879Y CN2869879Y CN 200620000144 CN200620000144U CN2869879Y CN 2869879 Y CN2869879 Y CN 2869879Y CN 200620000144 CN200620000144 CN 200620000144 CN 200620000144 U CN200620000144 U CN 200620000144U CN 2869879 Y CN2869879 Y CN 2869879Y
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Abstract
The utility model discloses a intelligence fault wire-selecting and positioning system, which comprises a pick device of the leading end, a radio emission device, a wireless receiver and a data analysis device; the data analysis device comprises an industrial controlling computer, a CT/PT filtration board and a data collection card; the industrial controlling computer comprises a base plate, a motherboard, a keyboard, a LCD screen, a power and a central processing unit; the CT/PT filtration board and data acquisition card are inserted on the motherboard of the industrial controlling computer; the measurable signal collected by a pick device at the leading end is sent to the data analysis center by a radio emission device and a wireless receiver; the measurable signal is filtered into a smooth voltage signal by the CT/PT filtration board, and sent to the data acquisition card; the data acquisition card converts the smooth voltage signal by means of an AD conversion, which is sent to the central processing unit for a data analysis. Compared with the existing technology, the utility model has the features of simplicity of operation, amicability of user interface, accuracy of wire-selecting and positioning, and reliable operation, etc.
Description
Technical field
The present invention relates to a kind of intelligent trouble route selection and positioning system, or rather, relate to a kind of intelligent trouble route selection and positioning system that is used for Power System Faults Detection.
Background technology
Develop rapidly along with national economy, the user improves day by day to the requirement of power supply quality and power supply reliability, in 6～66kV electric system, generally adopt isolated neutral or through the small current neutral grounding system mode of grounding through arc, complex circuit, branch are more, are difficult to search the trouble spot when fault such as phase fault or single-phase earthing takes place.Although current have multiple selection method to use, for example than width of cloth phase comparing method, harmonic wave method and first half-wave method etc., but any single selection method all is difficult to adapt to fully various electric network compositions and complex failure situation, thereby causes the route selection accuracy rate on the low side, can not fault location point position.Therefore, need a kind of route selection and positioning system, can indicate the circuit that singlephase earth fault takes place rapidly reliably and point out the trouble spot, thereby thoroughly change blindness line walking in the past, the backward practice that segmentation is closed a floodgate and sent electricity to search fault shortens power off time, reduces the power failure area and uses electric loss, alleviate track walker's labour intensity, improved power supply reliability.
The utility model content
The purpose of this utility model is: at the deficiencies in the prior art, provide a kind of can indicating reliably rapidly that phase fault and the circuit of singlephase earth fault and the intelligent trouble route selection and the positioning system of trouble spot take place.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of intelligent trouble route selection and positioning system, it comprises the front-end collection device, wireless launcher, radio receiver and data analysis set-up, this data analysis set-up comprises industrial computer, CT/PT filter band and data collecting card, this industrial computer comprises base plate, mainboard, keyboard, LCD screen, power supply and central processing unit, this CT/PT filter band and data collecting card are inserted on the mainboard of this industrial computer, but the measuring-signal that the front-end collection device is gathered sends to data analysis center via wireless launcher and radio receiver, deliver in this data collecting card after measuring-signal is converted to the smooth voltage signal via the filtering of CT/PT filter band but be somebody's turn to do, this data collecting card carries out being sent to central processing unit after AD changes to this smooth voltage signal and carries out data analysis
Preferably, this front-end collection device is the voltage transformer (VT) summation current transformer, but its voltage signal with institute's monitoring location on the power transmission lines is converted to measuring-signal.
Preferably, this CT/PT filter band employing cutoff frequency is the 2 rank Butterworth filters of 2000Hz.
Preferably, this central processing unit comprises intelligence than amplitude ratio phase module, harmonic wave route selection module, small echo route selection module, first half-wave route selection module, zero sequence energy route selection module, image recognition route selection module, the data of these modules after according to above-mentioned AD conversion draw analysis result separately respectively, these results after the central processing unit weighted mean as final route selection standard.
Further, this intelligent trouble route selection and positioning system also comprise 16 way switch templates.
Further, this intelligent trouble route selection and positioning system also comprise hardware watchdog.
Further, but this intelligent trouble route selection and positioning system also comprise operation interface, and the user can carry out record queries, state demonstration, parameter setting and password by above-mentioned keyboard and revise.
In above-mentioned technical scheme, by central processing unit intelligence is carried out analysis-by-synthesis than the result of calculation of amplitude ratio phase module, harmonic wave route selection module, small echo route selection module, first half-wave route selection module, zero sequence energy route selection module and image recognition route selection module, guarantee that the result has the highest correctness.Further, adopt the hardware watchdog technology, make that anti-interference, the self check of device and automatic recovery ability are strong.Further, the switch template can provide the output of the big driving capacity of multichannel switching value.Further, but the man-machine interaction environment of providing convenience for the user by operation interface.With respect to prior art, the utlity model has simple to operate, user interface is friendly, route selection accurate positioning and characteristics such as reliable.
Description of drawings
Fig. 1 is according to the route selection of a specific embodiment of the utility model and positioning system synoptic diagram;
Fig. 2 is according to the route selection of a specific embodiment of the utility model and position system function structural drawing;
Fig. 3 is the Butterworth filter circuit diagram according to a specific embodiment of the utility model;
Fig. 4 is the switch template circuit diagram according to a specific embodiment of the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further details.
With reference to figure 1 and Fig. 2, intelligent trouble route selection of the present utility model and positioning system comprise the front end data acquisition device, the signal that this device is gathered sends to data analysis set-up via wireless launcher and radio receiver, these signals are input in the high precision CT/PT filter band of data analysis set-up, deliver to data collecting card through being transformed to level and smooth voltage signal after the Butterworth LPF filtering, data collecting card carries out sending into central processing unit after the AD conversion to the filter band output signal.In one embodiment, the front end data acquisition device comprises voltage transformer (VT) summation current transformer (PT, CT), it is socketed on the cable to be measured, the zero sequence current signal of the bus residual voltage signal of small current neutral grounding system and each bar circuit is converted to through PT and CT conversion can survey signal.Central processing unit comprises intelligence than amplitude ratio phase module, harmonic wave route selection module, small echo route selection module, first half-wave route selection module, zero sequence energy route selection module and image recognition route selection module.Intelligence compares the amplitude and the phase place of residual voltage and all circuit zero-sequence currents of bus than amplitude ratio phase module, faulty line zero-sequence current phase place 90 ° of the residual voltages and anti-phase that should lag behind with the regular link zero-sequence current, if all circuit zero-sequence current homophases then are bus-bar fault.Harmonic wave route selection module contains abundant harmonic components in the circuit zero-sequence current, the phase place of all circuit zero sequence current harmonics components relatively then, faulty line zero-sequence current phase place should be anti-phase with the regular link zero-sequence current, if all circuit zero-sequence current homophases then are bus-bar fault.Small echo route selection module is utilized the transient current of singlephase earth fault generation and the foundation that harmonic current is judged as route selection, because the low current neutral grounding electric network single-phase earth fault equivalent circuit is a capacitive path, fault to act on the transient current that produces in the circuit suddenly very big usually, particularly take place under arc grounding fault or the intermittent grounding fault situation, transient current content is abundanter, duration is longer, and transient current satisfies at the numerical value on the faulty line and equals numerical value sum and the opposite relation of direction on non-fault line.In initial half cycle that the utilization of first half-wave module is broken down, faulty line zero-sequence current and the regular link zero continuous opposite characteristics of current polarity, thus carry out failure line selection by the zero-sequence current polarity of more first half-wave.After zero sequence energy selection method utilizes small current neutral grounding system generation single-phase earthing, the opposite polarity characteristics of the real component of the zero-sequence current of faulty line and regular link are carried out route selection, because the content of real component is less, so this module adopts the product of zero-sequence current and residual voltage, be the real component that the zero sequence energy is measured zero-sequence current, the circuit of zero sequence energy maximum is exactly a faulty line.Image recognition route selection module is in the wire selection system operational process, when finding some extremely fault sample of specific type, when being difficult to make reliable route selection and judging with regular selection method, then the fingerprint characteristic and the failure message of this time fault are preserved, as a reference sample, when similar fault occurring again, by mating with the sample fingerprint feature of preserving, just can infer the faulty line of the fault sample that makes new advances, constantly collect and substantial sample storehouse, just can handle the route selection problem of all kinds of special sample.Central processing unit is according to specific earthing type, and the route selection result of each route selection module be multiply by an experience factor a, all route selection results is weighted processing, thereby obtains a comprehensive route selection result, guarantees the highest correctness.After the elected circuit that is out of order, according to the collected current signal of front-end collection device that is installed on this circuit, further fault location point.In a preferred embodiment, when adopting isolated neutral system, intelligent is 0.75 than amplitude ratio phase route selection module a, and harmonic wave route selection module a is 0.05, and small echo route selection module a is 0.1, and first half-wave route selection module a is 0.1; When adopting the neutral by arc extinction coil grounding system, zero sequence energy route selection module a is 0.55, and harmonic wave route selection module a is 0.1, and small echo route selection module a is 0.15, and first half-wave route selection module a is 0.2.It will be appreciated by those skilled in the art that in other embodiments, also can adopt other different weighting coefficient.Further, central processing unit also can repeat route selection every 1 second and calculate under the situation that fault does not have to disappear, disappear until fault, thereby get rid of the influence of big interference at random effectively, improves the correctness of route selection.
In a specific embodiment, magnificent industrial computer is ground as hardware platform in intelligent trouble route selection of the present utility model and positioning system using Taiwan, header board is furnished with liquid crystal large screen display, function button and standard 105 keyboards, base plate, mainboard, power supply adopt PCA-6114, PCA-6003H-00A1 and original engine power supply, central processing unit adopts the PGA370 packaging industrial CPU card based on the Intel8244BX chipset, it uses Socket-370 processor interface, the DIMM of configurable 256MB on the plate of no buffer memory.It is 0.2 that voltage, current transformer adopt precision, and angle error is 5 ' high-accuracy voltage, current transformer.As shown in Figure 3, preferably to adopt cutoff frequency be the 2 rank Butterworth LPF of 2000Hz to the CT/PT filter band.Data collecting card adopts the AC1820A data collecting card, and sampled data deposits register in by isa bus, its have the single-ended input of 16 passages (± 5V), the A/D sampling rate is 1000Ksps.As shown in Figure 4; in one embodiment; this intelligent trouble route selection and positioning system also can comprise the 16 way switch amounts output switch template that links to each other with data collecting card; it can provide 16 tunnel big driving capacity switching value output and the outputs of 1 road power fail warning signal at most; the output of every road has the high voltage of 1000 volts of direct currents to isolate and photoelectricity is isolated; output channel has D-type latch; perceptual loading-diode protection loop is arranged, and channel signal is with the output of relay normally open contact form (the power fail warning signal is with the output of normally closed contact form).In another embodiment, this intelligent trouble route selection and positioning system also can comprise hardware watchdog, realize the hardware check intellectuality, improve anti-interference, self check and automatic recovery ability.Except voltage, current transformer, above-mentioned each device is installed in the airtight metal cabinet.But device also comprises an operation interface, and this device adopts Windows me system, and the user goes up operation below the realization by keyboard may command central processing unit in man-machine interface (liquid crystal giant-screen): show present operation of power networks state; Consult and management accounts, for example singlephase earth fault record before this; Parameter is provided with, for example at neutral grounding mode, the user can set the earthing mode of each bar bus neutral point, adjust according to protection and to calculate definite value and set the residual voltage setting valve, fault generation back is set postpones how long to send the grounding alarm signal, set source address, destination address, baud rate, be used for and combine the communications parameter when communication; Revise password.
Intelligent trouble route selection of the present utility model and positioning system are applicable to isolated neutral or through the small current neutral grounding system of the methods of operation such as arc suppression coil, resistance eutral grounding, can be widely used in the electric power system of the large-scale industrial enterprise such as transformer station, generating plant, power station and chemical industry, oil recovery, metallurgy, coal, railway of electric system.It adopts several different methods to carry out fault judgement, every kind of method has complementarity all at the concrete characteristics of signal between the distinct methods, thereby overcome the shortcoming that the single algorithm of device, single are in the past judged the misoperation that causes, improved the reliability of device, judging nicety rate can reach 100%.Shorten power off time, reduce the power failure area and use electric loss, alleviate track walker's labour intensity, improved power supply reliability.
Those skilled in the art are to be understood that; the disclosed specific embodiment of the utility model is not to be intended to the utility model is carried out any restriction; but in order to make the those skilled in the art more clearly understand the utility model, protection domain of the present utility model is only defined by appended claims.
Claims (7)
1, a kind of intelligent trouble route selection and positioning system, it comprises the front-end collection device, wireless launcher, radio receiver and data analysis set-up, it is characterized in that: this data analysis set-up comprises industrial computer, CT/PT filter band and data collecting card, this industrial computer comprises base plate, mainboard, keyboard, LCD screen, power supply and central processing unit, this CT/PT filter band and data collecting card are inserted on the mainboard of this industrial computer, but the measuring-signal that the front-end collection device is gathered sends to data analysis center via wireless launcher and radio receiver, deliver in this data collecting card after measuring-signal is converted to the smooth voltage signal via the filtering of CT/PT filter band but be somebody's turn to do, this data collecting card carries out being sent to central processing unit after AD changes to this smooth voltage signal and carries out data analysis.
2, intelligent trouble route selection according to claim 1 and positioning system, it is characterized in that: this front-end collection device is the voltage transformer (VT) summation current transformer, but it is converted to measuring-signal with the voltage signal of institute's monitoring location on the power transmission lines and sends to wireless launcher.
3, intelligent trouble route selection according to claim 1 and positioning system is characterized in that: it is the 2 rank Butterworth filters of 2000Hz that this CT/PT filter band adopts cutoff frequency.
4, intelligent trouble route selection according to claim 1 and positioning system, it is characterized in that: this central processing unit comprises intelligence than amplitude ratio phase module, harmonic wave route selection module, small echo route selection module, first half-wave route selection module, zero sequence energy route selection module, image recognition route selection module, the data of these modules after to the AD conversion of input central processing unit draw analysis result separately respectively, these results after the central processing unit weighted mean as final route selection standard.
5, according to each described intelligent trouble route selection and positioning system in the claim 1 to 4, it is characterized in that: this intelligent trouble route selection and positioning system also comprise 16 way switch templates.
6, according to each described intelligent trouble route selection and positioning system in the claim 1 to 4, it is characterized in that: this intelligent trouble route selection and positioning system also comprise hardware watchdog.
7, according to each described intelligent trouble route selection and positioning system in the claim 1 to 4, it is characterized in that: but this intelligent trouble route selection and positioning system also comprise operation interface, and the user can carry out record queries, state demonstration, parameter setting and password by above-mentioned keyboard and revise.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620000144 CN2869879Y (en) | 2006-01-05 | 2006-01-05 | Intelligent fault line-selection and positioning system |
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| CN 200620000144 CN2869879Y (en) | 2006-01-05 | 2006-01-05 | Intelligent fault line-selection and positioning system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101926156A (en) * | 2007-12-18 | 2010-12-22 | 高通股份有限公司 | Monitoringand troubleshooting module associated with portable communication device |
| CN102759684A (en) * | 2011-04-29 | 2012-10-31 | 通用电气公司 | Device and method for detecting and locating defects in underground cables |
| CN102788934A (en) * | 2012-07-25 | 2012-11-21 | 深圳市普禄科智能检测设备有限公司 | Method and device for finding line ground fault point |
| CN103245823A (en) * | 2013-04-15 | 2013-08-14 | 国家电网公司 | Method for measuring voltage at interphase short circuit fault point of power transmission line |
| CN105044548A (en) * | 2015-04-27 | 2015-11-11 | 华北电力大学 | Fault line selection system for single phase ground fault in low current grounded system |
| CN106199300A (en) * | 2016-06-21 | 2016-12-07 | 国网河南省电力公司漯河供电公司 | A kind of method of testing of low current neutral grounding system fault route selecting device |
| CN112526295A (en) * | 2020-11-27 | 2021-03-19 | 国网陕西省电力公司铜川供电公司 | Multiple traveling wave and composite zero sequence current measurement line selection grounding protection system and method |
| CN113721107A (en) * | 2020-10-28 | 2021-11-30 | 国网河北省电力有限公司雄安新区供电公司 | Power line fault line selection system and method based on PMU |
-
2006
- 2006-01-05 CN CN 200620000144 patent/CN2869879Y/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101926156A (en) * | 2007-12-18 | 2010-12-22 | 高通股份有限公司 | Monitoringand troubleshooting module associated with portable communication device |
| CN101926156B (en) * | 2007-12-18 | 2016-08-10 | 高通股份有限公司 | The module being associated with portable communication appts is monitored and trouble shoot |
| US8626149B2 (en) | 2007-12-18 | 2014-01-07 | Qualcomm Incorporated | Monitoring and troubleshooting a module associated with a portable communication device |
| CN102759684A (en) * | 2011-04-29 | 2012-10-31 | 通用电气公司 | Device and method for detecting and locating defects in underground cables |
| CN102759684B (en) * | 2011-04-29 | 2016-08-03 | 通用电气公司 | For detecting and position the apparatus and method of the defect in underground cables |
| CN102788934B (en) * | 2012-07-25 | 2015-09-30 | 深圳市普禄科智能检测设备有限公司 | Search method and the device of line-to-ground fault point |
| CN102788934A (en) * | 2012-07-25 | 2012-11-21 | 深圳市普禄科智能检测设备有限公司 | Method and device for finding line ground fault point |
| CN103245823B (en) * | 2013-04-15 | 2015-08-05 | 国家电网公司 | Voltage at interphase short circuit fault point of power transmission line measuring method |
| CN103245823A (en) * | 2013-04-15 | 2013-08-14 | 国家电网公司 | Method for measuring voltage at interphase short circuit fault point of power transmission line |
| CN105044548A (en) * | 2015-04-27 | 2015-11-11 | 华北电力大学 | Fault line selection system for single phase ground fault in low current grounded system |
| CN106199300A (en) * | 2016-06-21 | 2016-12-07 | 国网河南省电力公司漯河供电公司 | A kind of method of testing of low current neutral grounding system fault route selecting device |
| CN113721107A (en) * | 2020-10-28 | 2021-11-30 | 国网河北省电力有限公司雄安新区供电公司 | Power line fault line selection system and method based on PMU |
| CN112526295A (en) * | 2020-11-27 | 2021-03-19 | 国网陕西省电力公司铜川供电公司 | Multiple traveling wave and composite zero sequence current measurement line selection grounding protection system and method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070214 Termination date: 20140105 |