CN2655254Y - Fault positioner for high-voltage transmission line multi-channel high-precise GPS single terminal - Google Patents
Fault positioner for high-voltage transmission line multi-channel high-precise GPS single terminal Download PDFInfo
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- CN2655254Y CN2655254Y CN 200320115422 CN200320115422U CN2655254Y CN 2655254 Y CN2655254 Y CN 2655254Y CN 200320115422 CN200320115422 CN 200320115422 CN 200320115422 U CN200320115422 U CN 200320115422U CN 2655254 Y CN2655254 Y CN 2655254Y
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Abstract
The utility model relates to a high pressure electric wire multiple routs high precise GPS single end bug positioning device, wherein the device induces signals from a second side winding group of each rout current mutual inductor, gets the three-phase detecting current through the voltage transform and the high resistance separation, detects the valve value on the three-phase detecting current to fix the -phase detecting bug rout, start the high speed data collection and the mode-digit transform of the corresponding bug rout, extracts the bug traveling wave shape feature data from the mode-digit transform data, labels the time mark y a high precise GPS device, and stores to a storage unit of a controlling device through a PCI bus after dividing and matching according to routs. The controlling device and the special used application software are respectively analyze and calculate the bug traveling wave shape feature data and time difference of each rout multiple refractions and reflections to judge the bug type and calculate the bug distance. The utility model can increase the positioning preciseness, the reliability, the practicability and the economic.
Description
Technical field
The utility model belongs to electric system grid fault diagnosis technology field, particularly a kind of high voltage transmission line duplex high precision GPS one-end fault locating device.
Background technology
The high voltage transmission line fault locator is the major equipment of electric system grid fault diagnosis.Ultra-high-tension power transmission line fault locator commonly used is on principle, and summary is got up, and can be divided into two class methods:
(1) impedance method: this method is calculated the equivalent impedance of check point to failure point of power transmission line by voltage, the current value of detection line one side (single-ended method) or both sides (both-end method) by mathematical method, thereby determines the position of transmission line malfunction.The bearing accuracy of this method is subjected to the influence of the nonlinear characteristic of nonlinear transition resistance, line parameter circuit value imbalance and distribution parameter and line fault equivalent impedance, and its error is bigger.
(2) traveling wave method: this method calculates position of failure point by measuring the time of fault traveling wave and reflection wave arrival circuit one end (single-ended method) or two ends (both-end method).The bearing accuracy of this method is subjected to sample rate, toggle rate, row involves its reflection wave identification, thunder and lightning interference etc. influences, and bearing accuracy is not high yet.
At present, mainly there is following problem in above-mentioned two class methods when reality is used:
(1) bearing accuracy is low: the traveling wave method error is generally at 500-1000 rice, and the impedance method error is generally at the 3-5% of total line length;
(2) reliability is not high: travelling wave ranging is difficult to catch wave head when close-in fault, the dead band is bigger; The error of impedance method increases along with the increase of faulty line length, thereby, more unreliable;
(3) transformer stations generally need many set of fault locating device, the cost height, and maintenance workload is big;
(4) the both-end fault locator needs the opposite end that corresponding apparatus is installed, and need take communication channel, debugging and difficult in maintenance.
Summary of the invention
The purpose of this utility model is exactly a kind of high voltage transmission line duplex high precision GPS one-end fault locating device of studying at the problem of above-mentioned existence.
Device of the present utility model is by multi-line three-phase current detection unit, threshold values detection failure identification of lines unit, high-speed data acquisition and AD conversion unit, the pre-value setting apparatus, fault traveling wave characteristic pattern data extraction unit, GPS writes the markers interface circuit, the high-precision GPS device, GPS reads the markers interface circuit and industrial computer constitutes, described industrial computer is by high performance processor CPU, 133MHz and above high-speed PCI bus, storage unit, the step-out time analysis unit of fault traveling wave characteristic pattern data, the fault distance computing unit, fault display unit, man-machine interface unit and other auxiliary equipment constitute, wherein:
The input end of multi-line three-phase current detection unit connects each line current mutual inductor secondary side winding: CTa1 respectively, CTb1, and CTc1 ..., CTan, CTbn, CTcn, its defeated input end that connects threshold values detection failure identification of lines unit that brings out; Threshold values detection failure identification of lines unit output terminal connects the input end of high-speed data acquisition and AD conversion unit; High-speed data acquisition is connected the input end of fault traveling wave characteristic pattern data extraction unit with the output terminal of AD conversion unit; Pre-value setting apparatus input end connects the output terminal of fault traveling wave characteristic pattern data extraction unit; Its output terminal connects the input end of fault traveling wave characteristic pattern data extraction unit; An output terminal of fault traveling wave characteristic pattern data extraction unit connects the input end that GPS writes the markers interface circuit, and another output terminal connects the storage unit of industrial computer; GPS writes the input end of the output terminal connection high-precision GPS device of markers interface circuit; The output terminal of high-precision GPS device connects the input end that GPS reads the markers interface circuit; The output terminal that GPS reads the markers interface circuit connects storage unit; Step-out time analysis unit, fault distance computing unit, the fault display unit of storage unit and fault traveling wave characteristic pattern data and the man-machine interface unit is two-way is connected.The public circuit board of multi-line three-phase current detection unit, high-speed data acquisition and AD conversion unit and fault traveling wave characteristic pattern data extraction unit, GPS writes the markers interface circuit and GPS reads the public circuit board of markers interface circuit, is connected with industrial computer by pci bus respectively.Industrial computer adopts real time operating system, realizes the various functions of high voltage transmission line duplex high precision GPS one-end fault location by the operation corresponding application software.
The utlity model has following characteristics:
1. localization of fault precision height
The sample frequency of existing apparatus is generally: 300kHz-600kHz, the row wave propagation velocity is approximately: 3 * 10
8Meter per second, theoretical error is: 500-1000 rice.The utility model adopts high-speed data Sampling techniques (100MHz and more than), high-precision GPS (10nS) is mark regularly, ultrafast personal computer industrial bus PCI (133MHz and more than), high-speed, multi-path switch (nanosecond) selected control circulation multi-channel sampling, high speed mould-number conversion ADC (100MHz and more than), the industrial computer configuration real-time oss high-capacity and high-speed buffer memory of unifying can guarantee the real-time and the integrality of sampled data to make composition error and dead band less than 15 meters.
2. reliability height
According to the fault traveling wave constant principle of form in the attenuation process of advancing, repeatedly catadioptric fault traveling wave characteristic pattern data of each circuit and mistiming are analyzed, can stablize, calculate reliably the once catadioptric mistiming average of fault traveling wave, thereby, calculate the fault distance of faulty line reliably.
3. practical
Owing to adopted multichannel travelling wave ranging principle and data high-speed access, treatment technology, so one cover high voltage transmission line fault locator only need be installed in a transformer station, not influenced by the opposite end, do not need the opposite end to cooperate installation, debugging and operation maintenance, and, be not subjected to circuit to return the restriction of number and electric pressure.
4. good economy performance
Because the dead band of the utility model localization of fault less than 15 meters, in transformer station's visual range, only needs single-ended installing, need not the opposite end cooperates, so reduced the equipment input widely, reduced installation, debugging and the operation and maintenance cost of equipment, reduced taking of communication channel.
5. high efficiency
Because before high-speed data acquisition, filtered whole non-fault datas, and only kept a spot of fault traveling wave characteristic pattern data in the high-speed data acquisition process, native system real data treatment capacity is little, speed cooperates also than being easier to, so the high efficiency of system.
Description of drawings
Accompanying drawing 1 is a principle of work block diagram of the present utility model.
Embodiment
Be further introduced below in conjunction with 1 pair of principle of work of the present utility model of accompanying drawing.
In accompanying drawing 1, A1, B1, C1 ..., An,, Bn, Cn represent n bar three-phase high-voltage transmission line of electricity.The input end of multi-line three-phase current detection unit 1 connects each line current mutual inductor secondary side winding: CTa1 respectively, CTb1, CTc1,, CTan, CTbn, CTcn, through voltage transitions and high-barrier from after, its output connects the input end of threshold values detection failure identification of lines unit 2, finishes multi-line three-phase current detection function.Threshold values detection failure identification of lines unit 2 is with three-phase detection current i
A1, i
B1, i
C1..., i
An, i
Bn, i
CnWith corresponding three-phase threshold current (may cause the minimum fault current of relay protection action) i
A10, i
B10, i
C10..., i
An0, i
Bn0, i
Cn0Compare, its output terminal connects the input end of high-speed data acquisition and AD conversion unit 3, if detect electric current more than or equal to threshold current, then this circuit is identified as faulty line, simultaneously, gives high-speed data acquisition and AD conversion unit 3 output signals, start the high-speed data acquisition and the analog to digital conversion of faulty line, otherwise this circuit is identified as non-fault line, does not carry out data acquisition and analog to digital conversion.After high-speed data acquisition and AD conversion unit 3 are received the high-speed data acquisition and analog to digital conversion signal of startup faulty line of threshold values detection failure identification of lines unit 2, count DSP control 10nS and above multiway analog switch by 300MHz and above high speed digital signal processor, the three-phase detection current of faulty line is carried out high-speed data acquisition and 105Msps and above high speed analog-to-digital conversion, and its result is stored in the corresponding high speed data buffer, its output terminal connects the input end of fault traveling wave characteristic pattern data extraction unit 5.The input end of pre-value setting apparatus 4 connects fault traveling wave characteristic pattern data extraction unit 5 output terminals, its output terminal connects fault traveling wave characteristic pattern data extraction unit 5 input ends, an output terminal of fault traveling wave characteristic pattern data extraction unit 5 connects the input end that GPS writes markers interface circuit 7, another output terminal connects the storage unit 6.1 of industrial computer 6, by high speed digital signal processor DSP reading corresponding data from high speed data buffer, compare with the initial set value of pre-value setting apparatus 4, and dynamically replace pre-value according to the Changing Pattern at extreme point and zero point, non-fault traveling wave characteristic pattern data is filtered, can reflect that the extreme point of fault traveling wave morphological feature and the data at zero point keep, be stored in the industrial computer designated memory locations 6.1 through high-speed PCI bus (133MHz and more than), and recovery initial set value, simultaneously, to the fault traveling wave characteristic pattern data mark GPS markers that remains, write input end output " writing markers " signal of markers interface circuit 7 to GPS.After GPS writes markers interface circuit 7 and receives " writing markers " signal, to pulse signal of input end output of high-precision GPS device 8.High-precision GPS device 8 is determined markers according to the rising edge (Event Mark) of this pulse signal, and its output terminal connects the input end that GPS reads markers interface circuit 9.The output terminal that GPS reads markers interface circuit 9 connects storage unit 6.1, GPS reads markers interface circuit 9 and reads the pairing markers of each fault traveling wave characteristic pattern data from the output terminal of high-precision GPS device 8, is stored in industrial computer 6 designated memory locations 6.1 through 133MHz and above high-speed PCI bus.Step-out time analysis unit 6.4, fault distance computing unit 6.3, fault display unit 6.2 and 6.5 two-way connections of man-machine interface unit of storage unit 6.1 and fault traveling wave characteristic pattern data.The step-out time analysis unit 6.4 of fault traveling wave characteristic pattern data is by processor CPU reading corresponding data from storage unit 6.1 of industrial computer, respectively repeatedly catadioptric fault traveling wave characteristic pattern data of each circuit and mistiming are analyzed and calculated, form fault traveling wave catadioptric time series.Fault distance computing unit 6.3 refines fault traveling wave characteristic pattern data and fault traveling wave catadioptric time series by the processor CPU of industrial computer, find out the once catadioptric mistiming average of stable fault traveling wave characteristic pattern data and fault traveling wave, and in order to judge its fault category, to calculate fault distance.Fault display unit 6.2 is saved in the form of localization of fault information with database in the hard disk of industrial computer by the processor CPU of industrial computer, for display demonstration, fault alarm, communication or other funcall.Man-machine interface unit 6.5 provides artificial setting and User Defined function.
Embodiment of the present utility model: the high-precision GPS one-end fault positioning system of the ultra-high-tension power transmission line of 10 circuit 15 error of meter.
Multi-line three-phase current detection unit 1 is made of current transformer and electronic circuit; Threshold values detection failure identification of lines unit 2 and high-speed data acquisition and AD conversion unit 3 are made of integrated circuit and electronic circuit, wherein, threshold values detects and adopts the electronic circuit comparer, high speed digital signal processor DSP adopts TMS320C 6202B-300 (300MHz), multiway analog switch adopts MAX4617 (10nS), and AD6645 (105Msps) is adopted in the high speed analog-to-digital conversion; High speed data buffer is made of RAM in register and the collection plate in the DSP sheet, and register is deposited fiducial value in the sheet, and RAM deposits intermediate result in the collection plate, and pre-value setting apparatus 4 keeps RAM to constitute by power down; Fault traveling wave characteristic pattern data extraction unit 5 is made of with relevant auxiliary circuit and relative application software thereof DSP; GPS writes markers interface circuit 7 and GPS and reads markers interface circuit 9 and be made of electronic circuit; High-precision GPS device 8 adopts the 10nS high-precision GPS device of the GPS of Wuhan University Engineering Technical Research Centre exploitation; Industrial computer adopts P4,1.8G and above high performance CPU and 133MHz and above high-speed PCI bus, storage unit 6.1 is made of electronic hard disc and common hard disk, and electronic hard disc is deposited real time data and frequently-used data, non-common data of common hard disk storing and historical data; The step-out time analysis unit 6.4 of fault traveling wave characteristic pattern data, fault distance computing unit 6.3 are made of industrial computer related hardware and corresponding algorithm and application software thereof; Fault display unit 6.2 is made of the display card and the display of industrial computer; Man-machine interface unit 6.5 is made of keyboard and mouse.
Claims (1)
1. high voltage transmission line duplex high precision GPS one-end fault locating device, it is characterized in that: described device is by multi-line three-phase current detection unit (1), threshold values detection failure identification of lines unit (2), high-speed data acquisition and AD conversion unit (3), pre-value setting apparatus (4), fault traveling wave characteristic pattern data extraction unit (5), GPS writes markers interface circuit (7), high-precision GPS device (8), GPS reads markers interface circuit (9) and industrial computer (6) constitutes, described industrial computer (6) is by high performance processor CPU, 133MHz and above high-speed PCI bus, storage unit (6.1), the step-out time analysis unit (6.4) of fault traveling wave characteristic pattern data, fault distance computing unit (6.3), fault display unit (6.2), man-machine interface unit (6.5) and other auxiliary equipment constitute; Wherein:
The input end of multi-line three-phase current detection unit (1) connects each line current mutual inductor secondary side winding: CTa1 respectively, CTb1, and CTc1 ..., CTan, CTbn, CTcn, its defeated input end that connects threshold values detection failure identification of lines unit (2) that brings out; Threshold values detection failure identification of lines unit (2) output terminal connects the input end of high-speed data acquisition and AD conversion unit (3); High-speed data acquisition is connected the input end of fault traveling wave characteristic pattern data extraction unit (5) with the output terminal of AD conversion unit (3); Pre-value setting apparatus (4) input end connects the output terminal of fault traveling wave characteristic pattern data extraction unit (5), and its output terminal connects the input end of fault traveling wave characteristic pattern data extraction unit (5); An output terminal of fault traveling wave characteristic pattern data extraction unit (5) connects the input end that GPS writes markers interface circuit (7), and another output terminal connects the storage unit (6.1) of industrial computer (6); GPS writes the input end of the output terminal connection high-precision GPS device (8) of markers interface circuit (7); The output terminal of high-precision GPS device (8) connects GPS and reads the input end of markers interface circuit (9); The output terminal that GPS reads markers interface circuit (9) connects storage unit (6.1); Step-out time analysis unit (6.4), fault distance computing unit (6.3), fault display unit (6.2) and two-way connection of man-machine interface unit (6.5) of storage unit (6.1) and fault traveling wave characteristic pattern data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320115422 CN2655254Y (en) | 2003-10-10 | 2003-10-10 | Fault positioner for high-voltage transmission line multi-channel high-precise GPS single terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320115422 CN2655254Y (en) | 2003-10-10 | 2003-10-10 | Fault positioner for high-voltage transmission line multi-channel high-precise GPS single terminal |
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| Publication Number | Publication Date |
|---|---|
| CN2655254Y true CN2655254Y (en) | 2004-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320115422 Expired - Fee Related CN2655254Y (en) | 2003-10-10 | 2003-10-10 | Fault positioner for high-voltage transmission line multi-channel high-precise GPS single terminal |
Country Status (1)
| Country | Link |
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| CN (1) | CN2655254Y (en) |
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2003
- 2003-10-10 CN CN 200320115422 patent/CN2655254Y/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |