CN102736003A - Portable partial discharge pulse current sensor - Google Patents
Portable partial discharge pulse current sensor Download PDFInfo
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- CN102736003A CN102736003A CN2012102364499A CN201210236449A CN102736003A CN 102736003 A CN102736003 A CN 102736003A CN 2012102364499 A CN2012102364499 A CN 2012102364499A CN 201210236449 A CN201210236449 A CN 201210236449A CN 102736003 A CN102736003 A CN 102736003A
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- partial discharge
- coupling capacitor
- current sensor
- coupling capacitance
- cable
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Abstract
The invention discloses a portable partial discharge pulse current sensor. The portable partial discharge pulse current sensor comprises a partial discharge detector, a first coupling capacitor and a second coupling capacitor, wherein the first coupling capacitor and the second coupling capacitor are respectively connected with the two ends of the partial discharge detector, and the other ends of the first coupling capacitor and the second coupling capacitor are respectively connected with a wiring clamper for clamping cables. The first coupling capacitor and the second coupling capacitor select coupling capacitors with the capacitance of 0.5-1,000 microfarads. The partial discharge detector has an impedance of 10 megohms. The portable partial discharge pulse current sensor disclosed by the invention is used for detecting insulation defects of a high-voltage cable by utilizing pulse high-frequency current generated in a process of partial discharge of the high-voltage cable, can immediately monitor an operation state of the high-voltage cable and finds out potential fault in advance; and the portable partial discharge disclosed by the invention has the advantages of simple operation, convenient installation, quickness and capability of carrying out an electric operation, and also has the advantages of largely reducing the workload of routing inspection of a GIS (global information system) and a cable and realizing and improving the reliability of online monitoring and the reliability of a detection result.
Description
Technical field
The present invention relates to a kind of sensor, particularly relate to a kind of portable office and put pulses of current sensor.
Background technology
The raising that power supply reliability is required along with the needs of electric system reform and development and user; The high-tension apparatus reliability of operation has received increasingly high attention; Wherein the shelf depreciation of GIS and cable always takes place in very little scope earlier, and discharge pulse rises very steep, comprises 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 number MHz.Do not have pulses of current sensor a simple to operate, easy for installation, quick and the ability hot line job at present, therefore, have only, come the shelf depreciation of GIS and cable is detected at present through increasing the workload of patrolling and examining of GIS and cable.
Summary of the invention
Based on this, to the problems referred to above, the present invention proposes a kind of simple to operate, easy for installation, quick and portable office can hot line job and puts pulses of current sensor, can significantly reduce the workload of patrolling and examining of GIS and cable.
Technical scheme of the present invention is: pulses of current sensor is put in a kind of portable office; Comprise Partial Discharge Detection device, first coupling capacitance and second coupling capacitance; The two ends of said Partial Discharge Detection device connect first coupling capacitance and second coupling capacitance respectively, first coupling capacitance and the other end of second coupling capacitance be connected respectively one be used for the clamping cable the wiring anchor clamps.
The described pulses of current sensor of present technique scheme 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; Axially propagate to go the ripple mode; The present technique scheme is through being installed in this pulses of current sensor the appearance of cable terminating equipment; Make it constitute the loop with this pulses of current sensor, test occurs in terminal and the inner local discharge signal of cable, and puts the position in source through the mistiming location 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 to make forceful electric power and two systems of light current through capacitor-coupled and isolation, and the high-frequency signal path is provided, and stops power current to get into weak electricity system, guarantees personal safety.Get into the Partial Discharge Detection device through the electric current after the coupling capacitance, electric current is carried out signals collecting and is sent to digital oscilloscope through the Partial Discharge Detection device.
Among embodiment, it is the coupling capacitance of 0.5 μ F-1000 μ F that said first coupling capacitance and said second coupling capacitance are selected electric capacity for use therein.Purpose is the normal operation that guarantees not influence high-tension cable.
Among embodiment, said Partial Discharge Detection utensil has the impedance of 10M Ω therein.Purpose is the normal operation that guarantees not influence high-tension cable.
The invention has the beneficial effects as follows:
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 potential fault in advance;
(2) simple to operate, easy for installation, quick and ability hot line job;
(3) significantly 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 said portable office of the embodiment of the invention puts pulses of current sensor and is connected in the synoptic diagram on the high-tension cable;
Fig. 2 is the circuit theory diagrams that pulses of current sensor is put in the said portable office of the embodiment of the invention;
Fig. 3 is the equivalent circuit diagram that pulses of current sensor is put in the said portable office of the embodiment of the invention;
Description of reference numerals:
10-Partial Discharge Detection device, 20-first coupling capacitance, 30-second coupling capacitance, 40-wiring anchor clamps, 50-dead ring, 60-cable armouring, 70-cable conductor.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated.
Embodiment:
As shown in Figure 1; Pulses of current sensor is put in a kind of portable office; Comprise Partial Discharge Detection device 10, first coupling capacitance 20 and second coupling capacitance 30; The two ends of said Partial Discharge Detection device 10 connect respectively first coupling capacitance 20 and second coupling capacitance, 30, the first coupling capacitances 20 and the other end of second coupling capacitance 30 be connected respectively one be used for the clamping cable wiring anchor clamps 40.
In the present embodiment, it is the coupling capacitance of 0.5 μ F-1000 μ F that said first coupling capacitance 20 is selected electric capacity for use with said second coupling capacitance 30, can guarantee not influence the normal operation of high-tension cable.
In the present embodiment, said Partial Discharge Detection device 10 has the impedance of 10M Ω, specifically, is that its impedance is approximately 10M Ω under 50Hz, can guarantee not influence the normal operation of high-tension cable.
Pulses of current sensor is put in the described portable office of 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; Axially propagate to go the ripple mode; The present technique scheme is through being installed in this pulses of current sensor the appearance of cable terminating equipment; Make it constitute the loop with this pulses of current sensor, test occurs in terminal and the inner local discharge signal of cable, and puts the position in source through the mistiming location 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 to make forceful electric power and two systems of light current through capacitor-coupled and isolation, and the high-frequency signal path is provided, and stops power current to get into weak electricity system, guarantees personal safety.Get into Partial Discharge Detection device 10 through the electric current after the coupling capacitance, carry out signals collecting and be sent to digital oscilloscope through 10 pairs of electric currents of Partial Discharge Detection device.
Pulses of current sensor is put in the described portable office of present embodiment, and the office's discharge signal frequency that is detected 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.
Like Fig. 1, shown in 2, the principle that pulses of current sensor is put in the said portable office of present embodiment is following:
This portable office is installed on the flange of the dead ring 50 of GIS or cable termination puts pulses of current sensor; On dead ring 50 both sides is respectively cable and GIS equipment; 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,, forms two capacitor C at that position so if in cable or GIS equipment generation shelf depreciation
1And C
2, this moment, Ca and Cb will be through conductor to C
1And C
2Discharge and recharge, thereby form a discharge loop, equivalent circuit Fig. 3, i
PDBe that pulse current, i are put in office
2Be the 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 Detection device 10.For axial power equipment,, collect and occur in inner office's discharge signal through external high frequency low-resistance sensing loop.
Pulses of current sensor is put in the described portable office of present embodiment; Easy for installation, quick and the signal capture ability is strong, the equipment that need not has a power failure the office of detection in real time discharge signal is installed; And cooperation office puts checkout equipment fault carried out analysis and judgement, grasps the function of high-tension apparatus running status comprehensively.
The above embodiment has only expressed embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (3)
1. pulses of current sensor is put in a portable office; It is characterized in that; Comprise Partial Discharge Detection device, first coupling capacitance and second coupling capacitance; The two ends of said Partial Discharge Detection device connect first coupling capacitance and second coupling capacitance respectively, first coupling capacitance and the other end of second coupling capacitance be connected respectively one be used for the clamping cable the wiring anchor clamps.
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 said first coupling capacitance and said second coupling capacitance are selected electric capacity for use.
3. pulses of current sensor is put in portable office according to claim 1, it is characterized in that said Partial Discharge Detection utensil has the impedance of 10M Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102364499A CN102736003A (en) | 2012-07-09 | 2012-07-09 | Portable partial discharge pulse current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102364499A CN102736003A (en) | 2012-07-09 | 2012-07-09 | Portable partial discharge pulse current sensor |
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| CN102736003A true CN102736003A (en) | 2012-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012102364499A Pending CN102736003A (en) | 2012-07-09 | 2012-07-09 | Portable partial discharge pulse current sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630811A (en) * | 2013-11-29 | 2014-03-12 | 广州供电局有限公司 | Digital partial discharge detecting system |
| CN107907802A (en) * | 2017-11-17 | 2018-04-13 | 国网湖南省电力有限公司 | A kind of powered partial discharge detection sensor of high-tension cable and its application process |
| WO2021052036A1 (en) * | 2019-09-16 | 2021-03-25 | 国网上海市电力公司 | Gis partial discharge detecting device and method based on flange bolts |
| CN112710934A (en) * | 2021-01-22 | 2021-04-27 | 杭州西湖电子研究所 | Partial discharge detection method for gas-insulated metal-enclosed switch cabinet |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04324377A (en) * | 1991-04-25 | 1992-11-13 | Toshiba Corp | Partial discharge pulse detector |
| CN101086515A (en) * | 2007-07-03 | 2007-12-12 | 西安交通大学 | Dynamotor local discharge on-line monitoring method based on double sensor directional coupling |
| CN101561472A (en) * | 2008-04-18 | 2009-10-21 | 日本电力电线电缆株式会社 | Detection method for local discharge |
| EP2199810A1 (en) * | 2008-12-18 | 2010-06-23 | General Electric Company | Current sensor having coil mounted to current carrying bus and related system |
| CN202649392U (en) * | 2012-07-09 | 2013-01-02 | 广州供电局有限公司 | Portable partial discharge pulse current sensor |
-
2012
- 2012-07-09 CN CN2012102364499A patent/CN102736003A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04324377A (en) * | 1991-04-25 | 1992-11-13 | Toshiba Corp | Partial discharge pulse detector |
| CN101086515A (en) * | 2007-07-03 | 2007-12-12 | 西安交通大学 | Dynamotor local discharge on-line monitoring method based on double sensor directional coupling |
| CN101561472A (en) * | 2008-04-18 | 2009-10-21 | 日本电力电线电缆株式会社 | Detection method for local discharge |
| EP2199810A1 (en) * | 2008-12-18 | 2010-06-23 | General Electric Company | Current sensor having coil mounted to current carrying bus and related system |
| CN202649392U (en) * | 2012-07-09 | 2013-01-02 | 广州供电局有限公司 | Portable partial discharge pulse current sensor |
Non-Patent Citations (2)
| Title |
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| 冯义 等: "水轮发电机局部放电在线监测中的抗干扰研究", 《高电压技术》 * |
| 柯钜金: "220 kV电缆及终端头局部放电测试技术的应用研究", 《电力建设》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630811A (en) * | 2013-11-29 | 2014-03-12 | 广州供电局有限公司 | Digital partial discharge detecting system |
| CN107907802A (en) * | 2017-11-17 | 2018-04-13 | 国网湖南省电力有限公司 | A kind of powered partial discharge detection sensor of high-tension cable and its application process |
| WO2021052036A1 (en) * | 2019-09-16 | 2021-03-25 | 国网上海市电力公司 | Gis partial discharge detecting device and method based on flange bolts |
| CN112710934A (en) * | 2021-01-22 | 2021-04-27 | 杭州西湖电子研究所 | Partial discharge detection method for gas-insulated metal-enclosed switch cabinet |
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Application publication date: 20121017 |