CN213240395U - Micro-power consumption cable partial discharge sensor - Google Patents
Micro-power consumption cable partial discharge sensor Download PDFInfo
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- CN213240395U CN213240395U CN202022379281.XU CN202022379281U CN213240395U CN 213240395 U CN213240395 U CN 213240395U CN 202022379281 U CN202022379281 U CN 202022379281U CN 213240395 U CN213240395 U CN 213240395U
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Abstract
The utility model discloses a micro-power consumption cable partial discharge sensor, which mainly relates to the technical field of power system fault detection; the device comprises a pulse current coupler, a signal processing circuit, a computing unit, a wireless communication module and a power management circuit, wherein the pulse current coupler, the signal processing circuit, the computing unit, the wireless communication module and the power management circuit are sealed in a shell; the pulse current coupler, the wireless communication module and the power management circuit are electrically connected with the signal processing circuit, and the signal processing circuit and the wireless communication module are electrically connected with the computing unit; the utility model discloses can solve the problem of the unable long-term reliable operation of cable partial discharge check out test set of operation in adverse circumstances at present, can satisfy mains operated's requirement simultaneously to simplify the service environment of equipment, improve equipment's popularization nature.
Description
Technical Field
The utility model relates to an electric power system fault detection technical field specifically is a sensor is put in little consumption cable office.
Background
Because the cable runs underground, the corresponding detection and maintenance of the cable are difficult, the running working condition of the cable cannot be known on the ground, and the local small hidden dangers caused by the conditions that the cable is soaked, the surface insulation is damaged, the joint is loosened and the like often cause larger vicious accidents because the local small hidden dangers cannot be found and treated in time.
The on-line monitoring of the partial discharge of the cable refers to the step that a sensor system collects partial discharge signals in the cable system under rated operating voltage in real time and transmits the partial discharge signals to a terminal for subsequent processing and judgment. The methods currently studied are: electromagnetic coupling, capacitive coupling, differential, directional coupling, ultrasonic detection, and the like.
At present, most of existing cable partial discharge detection products are offline detection, and high-speed acquisition cards or high-speed oscilloscopes are adopted in the existing cable partial discharge detection products, so that the equipment is large in size and high in power consumption; the signal coupling probe and the acquisition card belong to a separated form, so that a signal connecting line is longer and is easy to interfere, and the practicability of the system is seriously reduced; and because the cable runs underground, the long-term reliable operation of the on-line detection equipment is seriously influenced by high humidity, mildew and the like.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve the problem that exists among the prior art, provide a sensor is put in little consumption cable office, can solve the problem that the cable partial discharge check out test set of operation in adverse circumstances can't long-term reliable operation at present, can satisfy mains operated's requirement simultaneously to simplify the service environment of equipment, improve equipment's generalizability.
The utility model discloses a realize above-mentioned purpose, realize through following technical scheme:
a micro-power consumption cable partial discharge sensor comprises a pulse current coupler, a signal processing circuit, a computing unit, a wireless communication module and a power management circuit, wherein the pulse current coupler, the signal processing circuit, the computing unit, the wireless communication module and the power management circuit are sealed in a shell;
the pulse current coupler, the wireless communication module and the power management circuit are electrically connected with the signal processing circuit, and the signal processing circuit and the wireless communication module are electrically connected with the computing unit.
Preferably, the signal processing circuit is a low power consumption signal processing circuit.
Preferably, the calculation unit is a high-speed calculation unit.
Preferably, the wireless communication module is a short-range wireless communication module.
Preferably, the casing includes control casing, goes up arc casing, lower arc casing, pulse current coupler includes the pulse signal transform impedance of sealing in control casing, seals the pulse current coupling magnetic core in last arc casing, power management circuit is including the sealed electric coil of getting in lower arc casing, the built-in power of sealing in control casing.
Preferably, the power management circuit includes a power input switching circuit and an energy conversion circuit, the power input switching circuit is electrically connected to the signal processing circuit and the computing unit, and the energy conversion circuit is electrically connected to the power-taking coil.
Preferably, the power management circuit is electrically connected to the signal processing circuit and the wireless communication module, respectively.
Preferably, the output signal of the pulse current coupler is connected with a signal processing circuit to directly output digital information.
Preferably, the pulse current coupler is of an open type and can be directly clamped on a cable.
Contrast prior art, the beneficial effects of the utility model reside in that:
the utility model discloses an integrated design, with pulse current coupler, signal processing circuit, computational element, wireless communication module, power management circuit all integrated in a sealed casing, the scene need not be worked a telephone switchboard and debugs once more, has made things convenient for the site practicality. The micro-power consumption design is adopted, an external power supply is not needed, the use environment is simplified, and the micro-power consumption device can be used in any environment.
Drawings
FIG. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic block diagram of power management of the present invention.
The reference numbers in the drawings: 1. a housing; 2. a signal processing circuit; 3. a calculation unit; 4. a wireless communication module; 5. a power management circuit; 6. pulse signal transformation impedance; 7. a pulsed current coupling magnetic core; 8. taking a power coil; 11. a control housing; 12. an upper arc-shaped shell; 13. a lower arc-shaped shell.
Detailed Description
The present invention will be further described with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope defined in the present application.
Example (b): as shown in fig. 1-2, the utility model relates to a sensor is put in micro-power consumption cable office, including pulse current coupler, signal processing circuit 2, calculating unit 3, wireless communication module 4, the power management circuit 5 sealed in casing 1, signal processing circuit 2 is preferably low-power consumption signal processing circuit, calculating unit 3 is preferably high-speed calculating unit, wireless communication module 4 is preferably short distance wireless communication module.
Preferably, pulse current coupler is the opening type, can direct joint on the cable, and convenient to use is specific, casing 1 includes control housing 11, goes up arc casing 12, lower arc casing 13, goes up and adopts the integral type structure between arc casing 12 and the control housing 11, can dismantle between lower arc casing 13 and the last arc casing 12 and be connected.
Further, the pulse current coupler comprises a pulse signal transformation impedance 6 sealed in a control shell 11 and a pulse current coupling magnetic core 7 sealed in an upper arc-shaped shell 12.
Preferably, power management circuit 5 is including sealed getting electric coil 8, the sealed internal power supply in control housing 11 in arc casing 13 down, and power management circuit 5 respectively with signal processing circuit 2, calculating unit 3 and 4 electric connection of wireless communication module, the utility model discloses need not external power supply, whole life-span utilizes the circuit to get can and the battery work that self carried.
Preferably, the power management circuit 5 includes a power input switching circuit and an energy conversion circuit, the power input switching circuit is electrically connected to the signal processing circuit 2 and the computing unit 3, the energy conversion circuit is electrically connected to the power-taking coil 8, and the power input switching circuit supplies power to the computing unit 3 and the signal processing circuit 2 according to the condition of taking power from the outside.
Further, the output signal of the pulse current coupler is connected with the signal processing circuit 2 to directly output digital information.
The pulse current coupler, the wireless communication module 4 and the power management circuit 5 are all electrically connected with the signal processing circuit 2, the signal processing circuit 2 and the wireless communication module 4 are all electrically connected with the computing unit 3,
the pulse signal transformation impedance 6 is electrically connected with the signal processing circuit 2, the pulse signal transformation impedance 6 is used for converting an electromagnetic transient signal generated by partial discharge generated in the cable near the installation contact part of the pulse signal transformation impedance 6 into a weak electric signal, the signal processing circuit 2 is electrically connected with the computing unit 3, the signal processing circuit 2 is used for sampling the signal and computing the intensity of the partial discharge by the computing unit 3 after the electric signal is subjected to multi-stage amplification; the wireless communication module 4 is electrically connected with the computing unit 3, and sends the detected partial discharge signal and the detected cable temperature value to the wireless communication module 4, and the detected partial discharge signal and the detected cable temperature value are sent to nearby information acquisition equipment by the wireless communication module 4.
The utility model discloses the principle as follows: the pulse signal transformation impedance 6 and the electricity taking coil 8 are fixed on the surface of the signal collector, and the pulse current coupling magnetic core 7 is fixed on the surface of the joint of the tested cable during installation; the pulse signal transformation impedance 6 is used for converting a transient current signal generated by partial discharge generated in the cable induced by the pulse current coupling magnetic core 7 into a transient electric signal suitable for processing by the signal processing circuit 2, and the signal is filtered and amplified by the signal processing circuit 2 and then is sampled and calculated by the calculating unit 3. The calculation unit 3 sends the detected partial discharge amplitude to the wireless communication module 4, and the wireless communication module 4 sends the detected partial discharge amplitude to a nearby collector. The power management circuit 5 is connected with the power taking coil 8 and the built-in power supply, and the power management circuit 5 judges the power supply mode for the signal processing circuit 2 and the calculating unit 3 according to the output value of the energy taking module, so that the power supply of the equipment is ensured to the maximum extent, and the service life of the equipment is prolonged.
The utility model discloses an integration cable partial discharge check out test set and method based on little consumption, all integrate pulse current coupler, signal processing circuit, computational element, wireless communication module, power management circuit in a sealed casing for the transient state signal that the inside partial discharge of detection cable produced judges the insulation hidden danger of cable, provides information for early discovery cable fault hidden danger, avoids the accident to further enlarge.
Claims (9)
1. A micro-power consumption cable partial discharge sensor is characterized in that: the pulse current coupler is sealed in a shell (1), and comprises a pulse current coupler, a signal processing circuit (2), a computing unit (3), a wireless communication module (4) and a power management circuit (5);
the pulse current coupler, the wireless communication module (4) and the power management circuit (5) are electrically connected with the signal processing circuit (2), and the signal processing circuit (2) and the wireless communication module (4) are electrically connected with the computing unit (3).
2. The micro power consumption cable partial discharge sensor according to claim 1, wherein: the signal processing circuit (2) is a low-power consumption signal processing circuit.
3. The micro power consumption cable partial discharge sensor according to claim 1, wherein: the computing unit (3) is a high-speed computing unit.
4. The micro power consumption cable partial discharge sensor according to claim 1, wherein: the wireless communication module (4) is a short-distance wireless communication module.
5. The micro power consumption cable partial discharge sensor according to claim 1, wherein: the pulse current coupler is characterized in that the shell (1) comprises a control shell (11), an upper arc-shaped shell (12) and a lower arc-shaped shell (13), the pulse current coupler comprises pulse signal transformation impedance (6) sealed in the control shell (11) and a pulse current coupling magnetic core (7) sealed in the upper arc-shaped shell (12), and the power management circuit (5) comprises a power taking coil (8) sealed in the lower arc-shaped shell (13) and an internal power supply sealed in the control shell (11).
6. The micro power consumption cable partial discharge sensor according to claim 5, wherein: the power supply management circuit (5) comprises a power supply switching circuit and an energy conversion circuit, the power supply switching circuit is electrically connected with the signal processing circuit (2) and the calculating unit (3), and the energy conversion circuit is electrically connected with the power taking coil (8).
7. The micro power consumption cable partial discharge sensor according to claim 1, wherein: the power management circuit (5) is electrically connected with the signal processing circuit (2) and the wireless communication module (4) respectively.
8. The micro power consumption cable partial discharge sensor according to claim 1, wherein: the output signal of the pulse current coupler is connected with the signal processing circuit (2) and directly outputs digital information.
9. The micro power consumption cable partial discharge sensor according to claim 1, wherein: the pulse current coupler is of an open type and can be directly clamped on a cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022379281.XU CN213240395U (en) | 2020-10-22 | 2020-10-22 | Micro-power consumption cable partial discharge sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022379281.XU CN213240395U (en) | 2020-10-22 | 2020-10-22 | Micro-power consumption cable partial discharge sensor |
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| CN213240395U true CN213240395U (en) | 2021-05-18 |
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| CN202022379281.XU Active CN213240395U (en) | 2020-10-22 | 2020-10-22 | Micro-power consumption cable partial discharge sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110596551A (en) * | 2019-09-27 | 2019-12-20 | 国网浙江省电力有限公司电力科学研究院 | Partial discharge detection sensor |
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2020
- 2020-10-22 CN CN202022379281.XU patent/CN213240395U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110596551A (en) * | 2019-09-27 | 2019-12-20 | 国网浙江省电力有限公司电力科学研究院 | Partial discharge detection sensor |
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