CN203350385U - Direct current system parasitic circuit on-line detection apparatus - Google Patents
Direct current system parasitic circuit on-line detection apparatus Download PDFInfo
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- CN203350385U CN203350385U CN 201320348044 CN201320348044U CN203350385U CN 203350385 U CN203350385 U CN 203350385U CN 201320348044 CN201320348044 CN 201320348044 CN 201320348044 U CN201320348044 U CN 201320348044U CN 203350385 U CN203350385 U CN 203350385U
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- 230000003071 parasitic effect Effects 0.000 title claims abstract description 34
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- 230000003321 amplification Effects 0.000 claims description 10
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 7
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- 238000007493 shaping process Methods 0.000 claims description 7
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Abstract
The utility model relates to a direct current system parasitic circuit on-line detection apparatus, which belongs to the technical field of direct current circuit detection apparatuses. The utility model aims to provide an apparatus capable of detecting a direct current system parasitic circuit in an on-line way. The direct current system parasitic circuit on-line detection apparatus comprises a signal generator, a signal acquisition device and a fault detector. The signal output end of the signal acquisition device is connected with the signal input end of the fault detector. The fault detector is connected with the signal generator for communication. The apparatus is suitably used in various electric power departments.
Description
Technical field
A kind of straight-flow system parasitic loop of the utility model on-line measuring device, belong to DC circuit pick-up unit technical field, is specifically related to a kind of device that detects the straight-flow system parasitic loop.
Background technology
The straight-flow system parasitic loop, referring to that two covers divide between the direct supply of open shop exists a bit or a bit above electrical connection, and its connected mode may or connect by resistance for direct connection, between some positive poles, connects, connect anodal be connected with negative pole etc. had between some negative poles.
Requirement according to national grid: " two cover straight-flow systems should be installed by 220KV and above transformer station, normally answer the open loop operation ", but due to the construction of transformer substation transformation, equipment rebuilding, the factors such as personnel's maloperation, the phenomenon that there is parasitic loop in two cover straight-flow systems likely occurs, voltage status amount owing to parasitic loop occurring does not change, cause the interior direct current monitoring arrangement of installing in station at present not report to the police to parasitic loop, but it is apparent that there is the harmfulness of parasitic loop in two cover straight-flow systems, mainly comprise: 1, earth fault alarm sensitivity descends and protection malfunction chance increases, 2, cause two cover straight-flow system simultaneous ground fault alarms: one section plus earth, another section minus earth, 3, cause this load " decompression ", there is no working power, may cause the tripping of relevant device, 4, shorten service lifetime of accumulator, 5, cause straight-flow system fire etc.
About two cover straight-flow system parasitic loops, searching at present is all the abnormal information that indirectly reflects two cover straight-flow system parasitic loops by miscellaneous equipment; during such as the generation DC earthing; two cover straight-flow systems are all reported ground signalling; La searches on road in the process of DC earthing could find that straight-flow system has parasitic loop; search procedure is usually by drawing road to search, and the operational outfit protective device need to be stopped using in short-term, and danger is larger; and more consuming time, higher to maintainer's competency profiling.
The utility model content
The utility model overcomes the deficiency that prior art exists, and technical matters to be solved is: a kind of device that can detect online the straight-flow system parasitic loop is provided.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of straight-flow system parasitic loop on-line measuring device comprises: signal generator, signal picker and fault detector;
The signal output part of described signal picker is connected with the signal input part of fault detector, and described fault detector is connected with signal generator and carries out communication.
Described signal generator includes signal generating module, signal shaping module and signal output module, described signal generating module is connected with fault detector and carries out communication, after the signal output part serial connection signal shaping module of described signal generating module, with the signal input port of signal output module, be connected, the signal output part that the signal output part of described signal output module is signal generator.
Described fault detector includes signal amplification module, filtration module, analog-to-digital conversion module, signal processing module, the signal input part that the input end of described signal amplification module is fault detector, the output terminal of signal amplification module is connected in series successively filtration module and is connected with signal processing module after analog-to-digital conversion module, and described signal processing module is connected and carries out communication with above-mentioned signal generating module.
Described fault detector also includes display apparatus module, and described display apparatus module is connected with signal processing module.
Described fault detector also includes the sound and light alarm module, and described sound and light alarm module is connected with signal processing module.
Described signal picker adopts split-core type meter.
The beneficial effect that the utility model compared with prior art has is: the utility model is the parasitic loop of accurate detection system online, and simulation shows the parasitic loop situation, parasitic loop node are accurately located the most at last, show by display screen and acoustic-optic alarm, reach timely prompting staff's purpose; Adopt independently signal generator, can produce the detection signal that adapts to various straight-flow system tests, applied range, whole device circuit is simple for structure, and use is practical.
The accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in more detail:
Fig. 1 is electrical block diagram of the present utility model;
In figure: 1 is that signal generator, 2 is that signal picker, 3 is that fault detector, 4 is that signal generating module, 5 is that signal shaping module, 6 is that signal output module, 7 is that signal amplification module, 8 is that filtration module, 9 is that analog-to-digital conversion module, 10 is that signal processing module, 11 is that display apparatus module, 12 is that sound and light alarm module, 13 is the straight-flow system power end.
Embodiment
As shown in Figure 1, a kind of straight-flow system parasitic loop of the utility model on-line measuring device, comprise: signal generator 1, signal picker 2 and fault detector 3, the output terminal of described signal generator 1 is connected with straight-flow system power end 13, signal generator 1 can produce various electric current and voltage detection signals, described signal picker 2 gathers the direct current signal leakage current of the insulation against ground in each loop of straight-flow system, the signal output part of signal picker 2 is connected with the signal input part of fault detector 3, the signal of collection is sent to fault detector 3, described fault detector 3 is connected and carries out communication with signal generator 1, the signal that fault detector 3 produces according to collection signal and signal generator 1 judges whether tested branch road parasitic loop occurs.
Described signal generator 1 includes signal generating module 4, signal shaping module 5 and signal output module 6, described signal generating module 4 is connected and carries out communication with fault detector 3, after the signal output part serial connection signal shaping module 5 of described signal generating module 4, with the signal input port of signal output module 6, be connected, the signal output part that the signal output part of described signal output module 6 is signal generator 1.
Described fault detector 3 includes signal amplification module 7, filtration module 8, analog-to-digital conversion module 9, signal processing module 10, the signal input part that the input end of described signal amplification module 7 is fault detector 3, the output terminal of signal amplification module 7 is connected in series successively filtration module 8 and is connected with signal processing module 10 after analog-to-digital conversion module 9, and described signal processing module 10 is connected and carries out communication with above-mentioned signal generating module 4.
Described fault detector 3 also includes display apparatus module 11 and acousto-optic alarm module 12, described display apparatus module 11, sound and light alarm module 12 all is connected with signal processing module 10, the signal that described fault detector 3 gathers back signal picker 2 carries out Digital Filter Analysis, and contrasted with the signal generator 1 living signal waveform of adopting, judge whether tested branch road is parasitic loop, and show the parasitic loop direction on display apparatus module 11, test signal waveform and tested grounding impedance magnitude, and send sound and light alarm by sound and light alarm module 12, remind the staff.
Described signal picker 2 adopts split-core type meter, adopt split-core type meter can realize the current detecting of real-time online, reach the purpose of online detection parasitic loop electric current, above-mentioned signal generator 1 adopts independent signal generating module 4, can produce the detection signal that adapts to various straight-flow system tests, applied range.
The utility model in use, by signal generator 1 access straight-flow system power end 13, it is 0.167HZ that signal generator 1 alternately accesses frequency to straight-flow system power end 13 positive and negative busbars, in be limited to ± 5V of voltage, there is the ultra-low frequency signal of 200 K Ω resistance, micro-current signal, fault detector 2 detects the direct current signal leakage current of each loop insulation against ground, and simulation demonstration parasitic loop situation, and parasitic loop node are accurately located the most at last; After confirming parasitic loop, signal generator 1 access is one section direct supply wherein, produces a low frequency micro voltage signal, and positive and negative voltage-to-ground and the insulation resistance of 3 pairs of this section direct supplys of fault detector are calculated and show.
The above is explained in detail embodiment of the present utility model by reference to the accompanying drawings, but the utility model is not limited to above-described embodiment, in the ken possessed those of ordinary skills, can also under the prerequisite that does not break away from the utility model aim, make various variations.
Claims (6)
1. a straight-flow system parasitic loop on-line measuring device, is characterized in that: comprising: signal generator (1), signal picker (2) and fault detector (3);
The signal output part of described signal picker (2) is connected with the signal input part of fault detector (3), and described fault detector (3) is connected and carries out communication with signal generator (1).
2. a kind of straight-flow system parasitic loop on-line measuring device according to claim 1, it is characterized in that: described signal generator (1) includes signal generating module (4), signal shaping module (5) and signal output module (6), described signal generating module (4) is connected and carries out communication with fault detector (3), after the signal output part serial connection signal shaping module (5) of described signal generating module (4), with the signal input port of signal output module (6), be connected, the signal output part that the signal output part of described signal output module (6) is signal generator (1).
3. a kind of straight-flow system parasitic loop on-line measuring device according to claim 2, it is characterized in that: described fault detector (3) includes signal amplification module (7), filtration module (8), analog-to-digital conversion module (9), signal processing module (10), the signal input part that the input end of described signal amplification module (7) is fault detector (3), the output terminal of signal amplification module (7) is connected in series successively filtration module (8) and is connected with signal processing module (10) with after analog-to-digital conversion module (9), described signal processing module (10) is connected and carries out communication with above-mentioned signal generating module (4).
4. a kind of straight-flow system parasitic loop on-line measuring device according to claim 3, it is characterized in that: described fault detector (3) also includes display apparatus module (11), and described display apparatus module (11) is connected with signal processing module (10).
5. a kind of straight-flow system parasitic loop on-line measuring device according to claim 3, it is characterized in that: described fault detector (3) also includes sound and light alarm module (12), and described sound and light alarm module (12) is connected with signal processing module (10).
6. a kind of straight-flow system parasitic loop on-line measuring device according to claim 3, is characterized in that: described signal picker (2) employing split-core type meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320348044 CN203350385U (en) | 2013-06-18 | 2013-06-18 | Direct current system parasitic circuit on-line detection apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320348044 CN203350385U (en) | 2013-06-18 | 2013-06-18 | Direct current system parasitic circuit on-line detection apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186493A (en) * | 2015-08-31 | 2015-12-23 | 深圳供电局有限公司 | Method and system for rapidly processing parasitic defect of secondary loop |
| CN113359003A (en) * | 2021-04-26 | 2021-09-07 | 中国南方电网有限责任公司超高压输电公司梧州局 | DC parasitic loop detection system and method |
-
2013
- 2013-06-18 CN CN 201320348044 patent/CN203350385U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186493A (en) * | 2015-08-31 | 2015-12-23 | 深圳供电局有限公司 | Method and system for rapidly processing parasitic defect of secondary loop |
| CN113359003A (en) * | 2021-04-26 | 2021-09-07 | 中国南方电网有限责任公司超高压输电公司梧州局 | DC parasitic loop detection system and method |
| CN113359003B (en) * | 2021-04-26 | 2024-04-02 | 中国南方电网有限责任公司超高压输电公司梧州局 | DC parasitic loop detection system and method |
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Granted publication date: 20131218 Termination date: 20180618 |
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| CF01 | Termination of patent right due to non-payment of annual fee |