CN202649392U - Portable partial discharge pulse current sensor - Google Patents
Portable partial discharge pulse current sensor Download PDFInfo
- Publication number
- CN202649392U CN202649392U CN 201220330602 CN201220330602U CN202649392U CN 202649392 U CN202649392 U CN 202649392U CN 201220330602 CN201220330602 CN 201220330602 CN 201220330602 U CN201220330602 U CN 201220330602U CN 202649392 U CN202649392 U CN 202649392U
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- China
- Prior art keywords
- partial discharge
- coupling capacitor
- current sensor
- coupling capacitance
- cable
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Abstract
The utility model discloses a portable partial discharge pulse current sensor, comprising a partial discharge detector, a first coupling capacitor, and a second coupling capacitor. Two ends of the partial discharge detector are respectively connected with the first coupling capacitor and the second coupling capacitor. The other ends of the first coupling capacitor and the second coupling capacitor are respectively connected with wiring fixtures used to clamp cables. The first coupling capacitor and the second coupling capacitor use coupling capacitors with capacitance of 0.5[mu]F-1000[mu]F. The partial discharge detector has 10M[omega] impedance. The portable partial discharge pulse current sensor uses pulse high-frequency current generated by high-voltage cable partial discharge to detect insulation defects of a high-voltage cable, and can monitor operating state of the high-voltage cable in time and find out potential faults in advance. The portable partial discharge pulse current sensor is easy to operate, convenient to install, and is rapid and can be operated with electricity, thereby greatly reducing workload of GIS and cable inspection, and realizing and improving reliability of on-line monitoring and reliability of detection results.
Description
Technical field
The utility model relates to a kind of sensor, particularly relates to a kind of portable office and puts pulses of current sensor.
Background technology
The raising that power supply reliability is required along with needs and the user of reformation of electric power system development, the high-tension apparatus reliability of operation has been subject to more and more higher attention, wherein the shelf depreciation of GIS and cable always occurs in very little scope first, discharge pulse rises very steep, comprise a lot of high fdrequency components, to the frequency domain of tens of MHz, the shelf depreciation of GIS and cable is a kind of high-frequency pulse current at several MHz.Now do not have at present pulses of current sensor a simple to operate, easy for installation, quick and the energy hot line job, therefore, only have by increasing the workload of patrolling and examining of GIS and cable, come the shelf depreciation of GIS and cable is detected.
The utility model content
Based on this, for the problems referred to above, the utility model proposes a kind of portable office simple to operate, easy for installation, quick and the energy hot line job and put pulses of current sensor, can greatly reduce the workload of patrolling and examining of GIS and cable.
The technical solution of the utility model is: pulses of current sensor is put in a kind of portable office, comprise partial discharge detector, the first coupling capacitance and the second coupling capacitance, the two ends of described partial discharge detector connect respectively the first coupling capacitance and the second coupling capacitance, and the first coupling capacitance is connected respectively the wiring anchor clamps for the clamping cable with the other end of the second coupling capacitance.
The described pulses of current sensor of the technical program can carry out signals collecting to the high-frequency pulse current of high-tension apparatus shelf depreciation.High-voltage partial discharge is a kind of high-frequency pulse current, to go ripple mode Propagation, the technical program is by being installed in this pulses of current sensor the appearance of cable terminating equipment, make it consist of the loop with this pulses of current sensor, test occurs in the local discharge signal of terminal and cable inside, and puts the position in source by the digital office of digital oscilloscope test pulse current signal arrival different sensors.The relevant position that the wiring anchor clamps only need be clamped in cable gets final product, and the effect of coupling capacitance is so that two systems of forceful electric power and light current by capacitor-coupled and isolation, provide the high-frequency signal path, stops power current to enter weak electricity system, guarantees personal safety.Enter partial discharge detector through the electric current after the coupling capacitance, by partial discharge detector electric current is carried out signals collecting and is sent to digital oscilloscope.
Among embodiment, it is the coupling capacitance of 0.5 μ F-1000 μ F that described the first coupling capacitance and described the second coupling capacitance are selected electric capacity therein.Purpose is the normal operation that guarantees not affect high-tension cable.
Among embodiment, described partial discharge detector has the impedance of 10M Ω therein.Purpose is the normal operation that guarantees not affect high-tension cable.
The beneficial effects of the utility model are:
The pulse high-frequency current that produces when (1) utilizing high-tension cable generation shelf depreciation detects the insulation defect of high-tension cable, can in time monitor the running status of high-tension cable, finds in advance potential fault;
(2) simple to operate, easy for installation, quick and energy hot line job;
(3) greatly reduce the workload of patrolling and examining of GIS and cable, and realize and the reliability of raising on-line monitoring and the reliability of testing result.
Description of drawings
Fig. 1 is that the described portable office of the utility model embodiment puts pulses of current sensor and is connected in schematic diagram on the high-tension cable;
Fig. 2 is the circuit theory diagrams that pulses of current sensor is put in the described portable office of the utility model embodiment;
Fig. 3 is the equivalent circuit diagram that pulses of current sensor is put in the described portable office of the utility model embodiment;
Description of reference numerals:
The 10-partial discharge detector, 20-the first coupling capacitance, 30-the second coupling capacitance, 40-wiring anchor clamps, 50-dead ring, 60-cable armouring, 70-cable conductor.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated.
Embodiment:
As shown in Figure 1, pulses of current sensor is put in a kind of portable office, comprise partial discharge detector 10, the first coupling capacitance 20 and the second coupling capacitance 30, the two ends of described partial discharge detector 10 connect respectively the first coupling capacitance 20 and the second coupling capacitance 30, the first coupling capacitances 20 are connected respectively the wiring anchor clamps 40 for the clamping cable with the other end of the second coupling capacitance 30.
In the present embodiment, it is the coupling capacitance of 0.5 μ F-1000 μ F that described the first coupling capacitance 20 is selected electric capacity with described the second coupling capacitance 30, can guarantee not affect the normal operation of high-tension cable.
In the present embodiment, described partial discharge detector 10 has the impedance of 10M Ω, specifically, is that its impedance is approximately 10M Ω under 50Hz, can guarantee not affect the normal operation of high-tension cable.
Pulses of current sensor is put in the described portable office of the present embodiment, can carry out signals collecting to the high-frequency pulse current of high-tension apparatus shelf depreciation.High-voltage partial discharge is a kind of high-frequency pulse current, to go ripple mode Propagation, the technical program is by being installed in this pulses of current sensor the appearance of cable terminating equipment, make it consist of the loop with this pulses of current sensor, test occurs in the local discharge signal of terminal and cable inside, and puts the position in source by the digital office of digital oscilloscope test pulse current signal arrival different sensors.The relevant position that 40 need of wiring anchor clamps are clamped in cable gets final product, and the effect of coupling capacitance is so that two systems of forceful electric power and light current by capacitor-coupled and isolation, provide the high-frequency signal path, stops power current to enter weak electricity system, guarantees personal safety.Enter partial discharge detector 10 through the electric current after the coupling capacitance, carry out signals collecting and be sent to digital oscilloscope by 10 pairs of electric currents of partial discharge detector.
Pulses of current sensor is put in the described portable office of the present embodiment, and the Partial discharge signal frequency that detects mainly concentrates on 15MHz-50MHz, and signal attenuation is little, and discharge pulse resolution is less than 20 μ s, and the range of sensitivity of 20pC can cover three intervals.
As shown in Figure 1, 2, the described portable office of the present embodiment to put the principle of pulses of current sensor as follows:
At the flange of the dead ring 50 of GIS or cable termination this portable office is installed and puts pulses of current sensor, respectively cable and GIS equipment on dead ring 50 both sides, there is capacitor C a between cable armouring 60 and the cable conductor 70, there is capacitor C b between the conductor of GIS equipment and the shell, if in cable or GIS equipment generation shelf depreciation, form two capacitor C at that position so
1And C
2, this moment, Ca and Cb will be by conductor to C
1And C
2Discharge and recharge, thereby form a discharge loop, equivalent circuit Fig. 3, i
PDThat pulse current, i are put in office
2The i of Cb and Zd of flowing through
PDShunting, wherein a Z
CaBe the impedance of Ca, Z
CbBe the impedance of Cb, Zd is the impedance of partial discharge detector 10.For axial power equipment, by external high frequency low-resistance sensing loop, collect and occur in inner Partial discharge signal.
Pulses of current sensor is put in the described portable office of the present embodiment, easy for installation, quick and Signal catching capability is strong, the equipment that need not has a power failure and installs, and can detect in real time Partial discharge signal, and cooperation office puts checkout equipment fault analyzed judgement, grasps the function of high-tension apparatus running status comprehensively.
The above embodiment has only expressed embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.
Claims (3)
1. pulses of current sensor is put in a portable office, it is characterized in that, comprise partial discharge detector, the first coupling capacitance and the second coupling capacitance, the two ends of described partial discharge detector connect respectively the first coupling capacitance and the second coupling capacitance, and the first coupling capacitance is connected respectively the wiring anchor clamps for the clamping cable with the other end of the second coupling capacitance.
2. pulses of current sensor is put in portable office according to claim 1, it is characterized in that, it is the coupling capacitance of 0.5 μ F-1000 μ F that described the first coupling capacitance and described the second coupling capacitance are selected electric capacity.
3. pulses of current sensor is put in portable office according to claim 1, it is characterized in that, described partial discharge detector has the impedance of 10M Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220330602 CN202649392U (en) | 2012-07-09 | 2012-07-09 | Portable partial discharge pulse current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220330602 CN202649392U (en) | 2012-07-09 | 2012-07-09 | Portable partial discharge pulse current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202649392U true CN202649392U (en) | 2013-01-02 |
Family
ID=47418483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220330602 Expired - Lifetime CN202649392U (en) | 2012-07-09 | 2012-07-09 | Portable partial discharge pulse current sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202649392U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102736003A (en) * | 2012-07-09 | 2012-10-17 | 广州供电局有限公司 | Portable partial discharge pulse current sensor |
| CN111521907A (en) * | 2020-06-01 | 2020-08-11 | 广东电网有限责任公司 | Partial discharge monitoring and fault on-line positioning device |
-
2012
- 2012-07-09 CN CN 201220330602 patent/CN202649392U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102736003A (en) * | 2012-07-09 | 2012-10-17 | 广州供电局有限公司 | Portable partial discharge pulse current sensor |
| CN111521907A (en) * | 2020-06-01 | 2020-08-11 | 广东电网有限责任公司 | Partial discharge monitoring and fault on-line positioning device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200925 Address after: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. Address before: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee before: GUANGZHOU POWER SUPPLY Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130102 |