CN203350333U - DC (direct current) system alternating current fault detection apparatus - Google Patents
DC (direct current) system alternating current fault detection apparatus Download PDFInfo
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- CN203350333U CN203350333U CN 201320347942 CN201320347942U CN203350333U CN 203350333 U CN203350333 U CN 203350333U CN 201320347942 CN201320347942 CN 201320347942 CN 201320347942 U CN201320347942 U CN 201320347942U CN 203350333 U CN203350333 U CN 203350333U
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- direct current
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- 238000001514 detection method Methods 0.000 title abstract description 5
- 238000005070 sampling Methods 0.000 claims abstract description 26
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Abstract
The utility model relates to a DC system alternating current fault detection apparatus, which belongs to the technical field of DC circuit detection apparatuses. The utility model aims to provide an apparatus capable of accurately detecting DC system alternating current faults. The DC system alternating current fault detection apparatus comprises a block filtering module, a voltage dividing module, an AC-DC conversion module, a sampling module and a processor module. The signal output end of the block filtering module is sequentially serially connected with the voltage dividing module, the AC-DC conversion module and the sampling module and then connected with the signal input port of the processor module. The apparatus is suitably used in various electric power departments.
Description
Technical field
A kind of straight-flow system of the utility model exchanges the crosstalk failure detector, belongs to DC circuit pick-up unit technical field, is specifically related to a kind of device that exchanges the crosstalk fault that detects.
Background technology
Interchange crosstalk fault in straight-flow system refers to: the situation that the phase line in alternating current directly or indirectly is connected with the negative or positive electrode of straight-flow system occurs to exchange the crosstalk fault and is usually caused by following two kinds of reasons: 1, maintainer's maloperation in straight-flow system; 2, the equipment that contains Alternating Current Power Supply in straight-flow system breaks down and causes exchanging crosstalk; Occur to exchange the crosstalk fault in straight-flow system and also can cause the misoperation of protection even without 2 ground connection; in straight-flow system; all there is certain distributed capacitance over the ground in cable; if seal in AC power in straight-flow system; this alternating current can enter closing circuit by distributed capacitance; if distributed capacitance is larger, the interchange ground connection internal resistance sealed in is again little, can become the protection action.
According to the safe countermeasure of the operation maintenance of the up-to-date promulgation of national grid, after occurring to exchange the crosstalk fault in straight-flow system, direct current system online insulated monitoring device need send alarm signal and have writing function, and the on-line insulation monitoring moved in current straight-flow system does not all possess the crosstalk of interchange measuring ability, after causing straight-flow system to occur to exchange the crosstalk fault, the maintainer can not process in time, the safety of harm straight-flow system.
The utility model content
The utility model overcomes the deficiency that prior art exists, and technical matters to be solved is: provide a kind of and can accurately detect the device that straight-flow system exchanges the crosstalk fault.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of straight-flow system exchanges the crosstalk failure detector, comprising: every straight filtration module, division module, the straight modular converter of friendship, sampling module and processor module;
The described signal output part every straight filtration module is connected in series successively division module, hands over straight modular converter and be connected with the signal input port of processor module after sampling module.
Described straight-flow system exchanges the crosstalk failure detector and also includes: DC partial voltage module, second-order filter module, direct current biasing module, direct current sampling module, the signal output port of described DC partial voltage module is connected with the signal input port of processor module after being connected in series successively second-order filter module, direct current biasing module and direct current sampling module.
Described processor module is connected with display apparatus module and acousto-optic alarm module.
The beneficial effect that the utility model compared with prior art has is: the utility model can propose the DC component in AC system effectively, detect exactly AC compounent, and give the alarm, reach the accurate warning that exchanges the crosstalk fault, can also reach the accuracy of DC voltage sampling when occurring to exchange the crosstalk fault simultaneously; Whole device circuit is simple for structure, powerful, practical.
The accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in more detail:
Fig. 1 is to be originally the electrical block diagram of utility model;
In figure: 1 is to be that division module, 3 is that the straight modular converter of friendship, 4 is that sampling module, 5 is that processor module, 6 is that DC partial voltage module, 7 is that second-order filter module, 8 is that direct current biasing module, 9 is that direct current sampling module, 10 is that display apparatus module, 11 is that sound and light alarm module, 12 is the DC circuit system every straight filtration module, 2.
Embodiment
As shown in Figure 1, a kind of straight-flow system of the utility model exchanges the crosstalk failure detector, comprising: every straight filtration module 1, division module 2, hand over straight modular converter 3, sampling module 4 and processor module 5; The described signal output part every straight filtration module 1 is connected in series successively division module 2, hands over straight modular converter 3 and be connected with the signal input port of processor module 5 after sampling module 4; Described processor module 5 is connected with display apparatus module 10 and acousto-optic alarm module 11.
For the detection that exchanges the crosstalk fault, the most important thing is the collection of AC signal, in the utility model, the above-mentioned signal input part every straight filtration module 1 is connected with DC circuit system 12, be sent to sampling module 4 after the AC signal dividing potential drop that circuit is produced and direct current conversion, sampling module 4 carries out the sampling of per second 10000 times, be sent to processor module 5 after sampled value is average, processor module 5 is calculated result according to the sampled data analysis meter, and result is shown in aforementioned display device module 10, if the crosstalk fault occurs to exchange, rely on sound and light alarm module 11 to send sound and light alarm.
Described straight-flow system exchanges the crosstalk failure detector and also includes: DC partial voltage module 6, second-order filter module 7, direct current biasing module 8, direct current sampling module 9, the signal output port of described DC partial voltage module 6 is connected with the signal input port of processor module 5 after being connected in series successively second-order filter module 7, direct current biasing module 8 and direct current sampling module 9, and the signal input port of DC partial voltage module 6 is connected with the DC circuit system.
The tradition insulation monitoring and warning device is all the average voltage method to the sampling of DC voltage usually, and in the situation without exchanging crosstalk, sampling is without any problem, but after crosstalk occurs to exchange, the direct current sampling is just inaccurate; The accuracy of DC voltage sampling when the utility model has adopted multistage filtering and voltage bias method to guarantee to exchange crosstalk, while in straight-flow system, sealing in alternating current, second-order filter module 7 is filtered most AC signal, certain alternating voltage relatively after direct current biasing module 8, be on the occasion of, direct current sampling module 9, through after long-time average, symmetrical AC signal being filtered, finally deducts inclined to one side threshold voltage and restores accurately real DC voltage.
The utility model can propose the DC component in AC system effectively, detect exactly AC compounent, and give the alarm, reach the accurate warning that exchanges the crosstalk fault, can also reach the accuracy of DC voltage sampling when occurring to exchange the crosstalk fault simultaneously; Whole device circuit is simple for structure, powerful, practical.
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 (3)
1. a straight-flow system exchanges the crosstalk failure detector, it is characterized in that: comprising: every straight filtration module (1), division module (2), hand over straight modular converter (3), sampling module (4) and processor module (5);
The described signal output part every straight filtration module (1) is connected in series successively division module (2), hands over straight modular converter (3) to be connected with the signal input port of processor module (5) with after sampling module (4).
2. a kind of straight-flow system according to claim 1 exchanges the crosstalk failure detector, it is characterized in that: described straight-flow system exchanges the crosstalk failure detector and also includes: DC partial voltage module (6), second-order filter module (7), direct current biasing module (8), direct current sampling module (9), the signal output port of described DC partial voltage module (6) is connected with the signal input port of processor module (5) after being connected in series successively second-order filter module (7), direct current biasing module (8) and direct current sampling module (9).
3. a kind of straight-flow system according to claim 1 and 2 exchanges the crosstalk failure detector, and it is characterized in that: described processor module (5) is connected with display apparatus module (10) and acousto-optic alarm module (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320347942 CN203350333U (en) | 2013-06-18 | 2013-06-18 | DC (direct current) system alternating current fault detection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320347942 CN203350333U (en) | 2013-06-18 | 2013-06-18 | DC (direct current) system alternating current fault detection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203350333U true CN203350333U (en) | 2013-12-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320347942 Expired - Fee Related CN203350333U (en) | 2013-06-18 | 2013-06-18 | DC (direct current) system alternating current fault detection apparatus |
Country Status (1)
| Country | Link |
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| CN (1) | CN203350333U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103926502A (en) * | 2014-04-23 | 2014-07-16 | 国家电网公司 | AC/DC electric channeling detection device of DC power source |
| CN113740756A (en) * | 2021-07-30 | 2021-12-03 | 中国南方电网有限责任公司超高压输电公司广州局 | Fault monitoring device, power supply state monitoring method and direct-current test power supply |
| CN113740756B (en) * | 2021-07-30 | 2024-04-26 | 中国南方电网有限责任公司超高压输电公司广州局 | Fault monitoring device, power state monitoring method and direct current test power supply |
-
2013
- 2013-06-18 CN CN 201320347942 patent/CN203350333U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103926502A (en) * | 2014-04-23 | 2014-07-16 | 国家电网公司 | AC/DC electric channeling detection device of DC power source |
| CN103926502B (en) * | 2014-04-23 | 2017-06-23 | 国家电网公司 | A kind of alternating current-direct current of dc source alters electric detection means |
| CN113740756A (en) * | 2021-07-30 | 2021-12-03 | 中国南方电网有限责任公司超高压输电公司广州局 | Fault monitoring device, power supply state monitoring method and direct-current test power supply |
| CN113740756B (en) * | 2021-07-30 | 2024-04-26 | 中国南方电网有限责任公司超高压输电公司广州局 | Fault monitoring device, power state monitoring method and direct current test power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131218 Termination date: 20170618 |