CN204177918U - A kind of underground cable shelf depreciation double-core on-Line Monitor Device - Google Patents
A kind of underground cable shelf depreciation double-core on-Line Monitor Device Download PDFInfo
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- CN204177918U CN204177918U CN201420716156.5U CN201420716156U CN204177918U CN 204177918 U CN204177918 U CN 204177918U CN 201420716156 U CN201420716156 U CN 201420716156U CN 204177918 U CN204177918 U CN 204177918U
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- high frequency
- frequency signal
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- signal cable
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- 238000012544 monitoring process Methods 0.000 claims abstract description 22
- 238000009413 insulation Methods 0.000 claims abstract description 20
- 238000004891 communication Methods 0.000 claims abstract description 5
- 230000003321 amplification Effects 0.000 claims abstract description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 4
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000011888 foil Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 5
- 230000009977 dual effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000007405 data analysis Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The utility model discloses a kind of underground cable shelf depreciation double-core on-Line Monitor Device, comprise High Frequency Current Sensor, high frequency signal cable and monitoring main frame, described High Frequency Current Sensor is connected with monitoring main-machine communication by high frequency signal cable, described monitoring main frame comprises insulation crust, described insulation crust inside is provided with circuit board, described circuit board is provided with signal amplification circuit, wave filter, High Speed Data Acquisition Circuit, processor, it is characterized in that: described insulation crust bottom-hinged has an interface protection case, the bnc interface mutually docked for a pair is provided with in described interface protection case, one of them bnc interface is connected with circuit board, another bnc interface is connected with high frequency signal cable output terminal, described high frequency signal cable passes from the wire hole of interface protection case sidewall, described high frequency signal cable input end is connected with High Frequency Current Sensor by bnc interface.The utility model facilitates maintenance, also improves the reliability of equipment.
Description
Technical field
The utility model relates to intelligent grid live detection field, particularly relates to distribution cable terminal Partial Discharge Detecting Technology field.
Background technology
Distribution cable is widespread use in distribution network, for guaranteeing its operational reliability, the partial discharge monitoring technology of a kind of advanced person obtained increasing application at electric power enterprise in recent years, this technology can when cable does not have a power failure by of short duration or prolonged placement High Frequency Current Sensor on the ground wire at cable two ends, measure the high-frequency current flow through wherein, the intensity of analytic signal and motion frequency, realize the on-line monitoring and fault diagonosing of distribution cable state of insulation.
Current on-Line Monitor Device, comprise High Frequency Current Sensor, high frequency signal cable and monitoring main frame, High Frequency Current Sensor is connected with monitoring main-machine communication by high frequency signal cable, wherein high frequency signal cable and monitoring main frame are docked by bnc interface, but bnc interface is exposed to outside monitoring main frame insulation crust, easily damages.
Utility model content
Technical problem to be solved in the utility model is just to provide a kind of underground cable shelf depreciation double-core on-Line Monitor Device, avoids bnc interface to damage, facilitates bnc interface to safeguard.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: a kind of underground cable shelf depreciation double-core on-Line Monitor Device, comprise High Frequency Current Sensor, high frequency signal cable and monitoring main frame, described High Frequency Current Sensor is connected with monitoring main-machine communication by high frequency signal cable, described monitoring main frame comprises insulation crust, described insulation crust inside is provided with circuit board, described circuit board is provided with signal amplification circuit, wave filter, High Speed Data Acquisition Circuit, processor, it is characterized in that: described insulation crust bottom-hinged has an interface protection case, the bnc interface mutually docked for a pair is provided with in described interface protection case, one of them bnc interface is connected with circuit board, another bnc interface is connected with high frequency signal cable output terminal, described high frequency signal cable passes from the wire hole of interface protection case sidewall, described high frequency signal cable input end is connected with High Frequency Current Sensor by bnc interface.
Preferably, described insulation crust adopts epoxy resin material.
Preferably, described processor has FPGA core and ARM core.
Preferably, described high frequency signal cable is the single core coaxial cable that decay is less than 0.5dB/m.
Preferably, described interface protection case sidewall is provided with lug boss, is provided with the spring foil metal of clamping lug boss bottom described insulation crust.
The technical solution adopted in the utility model; be provided with an interface protection case to isolate bnc interface; the impact of dust, water docking port can be avoided; the casing of monitoring main frame need not be opened when interface is safeguarded; direct utilization is opened interface protection case and is carried out operating; facilitate maintenance, also improve the reliability of equipment.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is further described:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of High Frequency Current Sensor;
Fig. 3 is monitoring main machine structure schematic diagram.
Embodiment
A kind of underground cable shelf depreciation of the utility model double-core on-Line Monitor Device, as shown in Figure 1, comprise High Frequency Current Sensor 1, high frequency signal cable 2 and monitoring main frame 3, described High Frequency Current Sensor is connected with monitoring main-machine communication by high frequency signal cable.
Wherein: high frequency signal cable is the single core coaxial cable that decay is less than 0.5dB/m (within 45MHz), electricity, High Frequency Current Sensor is connected by the bnc interface of high frequency signal cable one end, and the bnc interface of the high frequency signal cable other end is connected with the bnc interface of monitoring main frame.
As shown in Figure 2, High Frequency Current Sensor comprises shell 11, magnetic core 12, coil 13, integrating resistor 14, passive bandpass filters 15, BNC connector 16, wherein: magnetic core relative permeability is 3000; Coil is enameled wire, and wire diameter is 0.45mm, the number of turn 15 circle; Internal diameter is 60mm, and external diameter is 90mm, and signal output interface is bnc interface.
As shown in Figure 3, described monitoring main frame 3 comprises insulation crust 32, and described insulation crust inside is provided with circuit board, and described circuit board is provided with signal amplification circuit, wave filter, High Speed Data Acquisition Circuit, processor.Described insulation crust bottom-hinged has an interface protection case 31; the bnc interface mutually docked for a pair is provided with in described interface protection case; one of them bnc interface is connected with circuit board; another bnc interface is connected with high frequency signal cable output terminal; described high frequency signal cable passes from the wire hole of interface protection case sidewall, and described high frequency signal cable input end is connected with High Frequency Current Sensor by bnc interface.Described insulation crust adopts epoxy resin material, can tolerate and be not less than 20kV voltage.Described interface protection case sidewall is provided with lug boss 311, is provided with the spring foil metal 312 of clamping lug boss bottom described insulation crust.
Wherein: High Speed Data Acquisition Circuit bandwidth is 25MHz, sampling rate is 65Msps, and resolution is 8 bit data positions; Described High Speed Data Acquisition Circuit is connected with High Frequency Current Sensor by SMA interface.Processor is dual core processor, has FPGA core and ARM core, FPGA core data acquisition, data prediction function, and ARM core completes data storage, data analysis and data.Signal amplifies and the enlargement factor of electricity is 40dB.
The utility model has the following advantages:
1. the local discharge signal of pair underground cable is monitored
Adopt the utility model device can carry out the live detection of short time to underground cable local discharge, also can carry out long on-line monitoring.Owing to have employed dual core processor, system has the features such as volume is little, little power consumption, can conveniently in the cable terminal of underground cable, cable duct and ring main unit.
2. the discharge mode that electric wave detects over the ground identifies:
Because the ARM chip in the dual core processor of employing has 1GHz dominant frequency, therefore can conveniently develop discharge mode algorithm, discharge mode identification is carried out to local discharge signal.
Claims (5)
1. a underground cable shelf depreciation double-core on-Line Monitor Device, comprise High Frequency Current Sensor, high frequency signal cable and monitoring main frame, described High Frequency Current Sensor is connected with monitoring main-machine communication by high frequency signal cable, described monitoring main frame comprises insulation crust, described insulation crust inside is provided with circuit board, described circuit board is provided with signal amplification circuit, wave filter, High Speed Data Acquisition Circuit, processor, it is characterized in that: described insulation crust bottom-hinged has an interface protection case, the bnc interface mutually docked for a pair is provided with in described interface protection case, one of them bnc interface is connected with circuit board, another bnc interface is connected with high frequency signal cable output terminal, described high frequency signal cable passes from the wire hole of interface protection case sidewall, described high frequency signal cable input end is connected with High Frequency Current Sensor by bnc interface.
2. a kind of underground cable shelf depreciation double-core on-Line Monitor Device according to claim 1, is characterized in that: described insulation crust adopts epoxy resin material.
3. a kind of underground cable shelf depreciation double-core on-Line Monitor Device according to claim 1, is characterized in that: described processor has FPGA core and ARM core.
4. a kind of underground cable shelf depreciation double-core on-Line Monitor Device according to claim 1, is characterized in that: described high frequency signal cable is the single core coaxial cable that decay is less than 0.5dB/m.
5. a kind of underground cable shelf depreciation double-core on-Line Monitor Device according to claim 1, is characterized in that: described interface protection case sidewall is provided with lug boss, is provided with the spring foil metal of clamping lug boss bottom described insulation crust.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420716156.5U CN204177918U (en) | 2014-11-25 | 2014-11-25 | A kind of underground cable shelf depreciation double-core on-Line Monitor Device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420716156.5U CN204177918U (en) | 2014-11-25 | 2014-11-25 | A kind of underground cable shelf depreciation double-core on-Line Monitor Device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204177918U true CN204177918U (en) | 2015-02-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420716156.5U Active CN204177918U (en) | 2014-11-25 | 2014-11-25 | A kind of underground cable shelf depreciation double-core on-Line Monitor Device |
Country Status (1)
| Country | Link |
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| CN (1) | CN204177918U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907354A (en) * | 2017-11-07 | 2018-04-13 | 南京高华科技股份有限公司 | One kind is used for standard EMU Cross deformation detection device |
| CN108051713A (en) * | 2017-12-15 | 2018-05-18 | 重庆臻远电气有限公司 | There is the partial discharge location device for shielding low frequency and high noisy |
| CN111551831A (en) * | 2020-06-01 | 2020-08-18 | 广西电网有限责任公司南宁供电局 | Model machine platform for monitoring partial discharge of distribution cable |
-
2014
- 2014-11-25 CN CN201420716156.5U patent/CN204177918U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907354A (en) * | 2017-11-07 | 2018-04-13 | 南京高华科技股份有限公司 | One kind is used for standard EMU Cross deformation detection device |
| CN108051713A (en) * | 2017-12-15 | 2018-05-18 | 重庆臻远电气有限公司 | There is the partial discharge location device for shielding low frequency and high noisy |
| CN111551831A (en) * | 2020-06-01 | 2020-08-18 | 广西电网有限责任公司南宁供电局 | Model machine platform for monitoring partial discharge of distribution cable |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |