CN202916392U - Online monitoring system for partial discharge of switch cabinet based on pulse current method and grounding electric wave method - Google Patents
Online monitoring system for partial discharge of switch cabinet based on pulse current method and grounding electric wave method Download PDFInfo
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- CN202916392U CN202916392U CN 201220525370 CN201220525370U CN202916392U CN 202916392 U CN202916392 U CN 202916392U CN 201220525370 CN201220525370 CN 201220525370 CN 201220525370 U CN201220525370 U CN 201220525370U CN 202916392 U CN202916392 U CN 202916392U
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Abstract
The utility model discloses an online monitoring system for partial discharge of a switch cabinet based on a pulse current method and a grounding electric wave method. A high-frequency pulse current sensor is embedded into a cable shielding layer grounding wire in the wire outlet of the switch cabinet to obtain pulse current signals, and simultaneously a grounding electric wave sensor is pasted to the surface of a housing body of the switch cabinet to obtain instant grounding transient voltage generated by electromagnetic waves, thereby monitoring partial discharge of the switch cabinet. The online monitoring system of the utility model can monitor partial discharge in a high-voltage switch cabinet, can discover insulating defects of equipment at early time, and sends out early warning signals timely; and is simple in structure, small in size and convenient for installation; the sensitivity and accuracy of partial discharge tests are high; and disadvantages in the prior art can be effectively overcome.
Description
Technical field
Present technique relates to a kind of high-tension switch cabinet insulating monitoring technical field, is specifically related to a kind of local discharge on-line monitoring device based on pulse current method and ground electric wave method.
Background technology
Known partial discharge of switchgear on-line testing instrument adopts the non-intruding detection mode, by ground electric wave (TEV) and the external sensing principle of ultrasound wave (AE), the insulation defect of high-tension switch cabinet is carried out online diagnosis and detection.Wherein, ultrasonic sensor sensibility is lower, and the anti-electromagnetic interference capability of sensor is relatively poor, can't well measure at the scene discharge signal.
The utility model content
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of partial discharge of switchgear on-line monitoring system based on pulse current method and ground electric wave method, it is characterized in that: the high-frequency electrical pulses flow sensor is nested on the line outlet cable shielding layer earthing line of switch cubicle, the ground radio wave sensor sticks on the switch board housing cabinet surface, monitors simultaneously.High-frequency electrical pulses flow sensor and ground radio wave sensor adopt the magnetic coupling mode to work.Data server is put the monitoring terminal drawn game with office respectively and is put monitoring terminal and adopt 485 communication buses to be connected, the high-frequency electrical pulses flow sensor is nested on the line outlet cable shielding layer earthing line of switch cubicle, exactly in order better to monitor unusual pulsed current signal in the joint of shielding layer grounding line, the ground radio wave sensor is sticked on the switch board housing cabinet surface, monitoring is because the transient earthing transient voltage that electromagnetic wave produces, then office puts monitoring terminal and adopts coaxial cable for high frequency to carry out the collection of pulsed current signal, office puts monitoring terminal and adopts coaxial cable for high frequency to carry out the collection of transient earthing transient voltage signal, and then is uploaded to data server by 485 buses.Put characteristic if the pulsed current signal that monitors and transient earthing transient voltage satisfy office, then can judge shelf depreciation occured in the switch cubicle one time.
Technique scheme can be found out, because the utility model is implemented the high-frequency electrical pulses flow sensor is nested on the line outlet cable shielding layer earthing line of switch cubicle, the ground radio wave sensor sticks on the switch board housing cabinet surface, monitor simultaneously, in order to whether shelf depreciation occured in the monitoring switch cabinet.Therefore the utility model is compared with existing technology and has the following advantages:
1. the accuracy height is put in easy for installation, sensitivity drawn game.Employing is nested in the high-frequency electrical pulses flow sensor on the line outlet cable shielding layer earthing line of switch cubicle and the ground radio wave sensor sticks on the switch board housing cabinet surface, monitors simultaneously.
2. high-frequency electrical pulses flow sensor, the monitoring frequency range is 10M-100M, adopts simultaneously the ground radio wave sensor, and band is wider than 100MHz, pulse is put in the office that can obtain frequency range and be 4M-100MHz, can effectively avoid low frequency noises and the carrier signal of frequency band below 4M.
3. be convenient to judge source and the feature of signal, improved the reliability that monitoring result is put in office.The ground radio wave sensor sticks on the switch board housing cabinet surface, because external electromagnetic waves also can produce instantaneous transient voltage signal at the switch cubicle metal shell, at this moment just can not judge whether it is office to have occured in the switch cubicle put.Put the signal of generation in order to get rid of extraneous undesired signal or switch cubicle generation office, we are nested in the high-frequency electrical pulses flow sensor on the line outlet cable shielding layer earthing line of switch cubicle, whether pulsed current signal is arranged on the synchronization monitoring cable, can judge just whether switch cubicle office has occured put.
Description of drawings
For clearer explanation the utility model embodiment or technical scheme of the prior art, the below will do simple introduction to the accompanying drawing of required use among the embodiment or in the description of the Prior Art.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is that the high-frequency electrical pulses flow sensor is nested on the switch cabinet outlet mouth cable shielding layer earthing line and the ground radio wave sensor sticks on demonstration graph on the switch board housing cabinet surface.
Description of reference numerals:
1. switch cubicle; 2. radio wave sensor; 3. threephase cable; 4. shielding layer grounding line; 5. high-frequency electrical pulses flow sensor; 6. concentric cable; 7. concentric cable; 8. user; 9. monitoring terminal is put in office; 10. monitoring terminal is put in office; 11.485 bus; 12. data server;
Embodiment
Mainly comprise with reference to Fig. 1 present embodiment: data server 12, office put monitoring terminal 9, office put monitoring terminal 10, high-frequency electrical pulses flow sensor 5, radio wave sensor 2; Data server 12 is positioned over transformer station's master-control room, office puts monitoring terminal 9 drawn games and puts the instrument cabinet that monitoring terminal 10 is positioned over switch cubicle 1, high-frequency electrical pulses flow sensor 5 is nested on the line outlet cable shielding layer earthing line 4 of switch cubicle 1, and ground radio wave sensor 2 sticks on the switch cubicle 1 shell cabinet surface; High-frequency electrical pulses flow sensor 5 and ground radio wave sensor 2 all adopt the magnetic coupling mode to work.When in the high-tension switch cabinet 1 shelf depreciation being arranged, to have the extremely short pulse current of process along discharge channel produces, the width of these current impulses is generally the ns level, the Pulse Electric that produces fails to be convened for lack of a quorum along cable transmission, high-frequency electrical pulses flow sensor 5 is nested on the line outlet cable shielding layer earthing line 4 of switch cubicle 1, better monitors unusual pulsed current signal in the joint of shielding layer grounding line 4 timely; Simultaneously, when high-tension switch cabinet 1 generation office put, it can produce the electromagnetic wave in the radio-frequency band, and it is only with by the perforate on the metal shell, from switch cubicle 1 internal leakage to outside surface.These perforates can be the gaps around shell or packing washer or other insulating element.When Electromagnetic Wave Propagation arrived switch cubicle 1 outside, its can produce transient voltage at the metal shell of ground connection.Ground radio wave sensor 2 is sticked on the switch cubicle 1 shell cabinet surface, exactly in order to monitor unusual transient earthing transient voltage.Then office puts monitoring terminal 9 and adopts coaxial cables for high frequency 6 to carry out the collection of pulsed current signal, and office puts monitoring terminal 10 and adopts coaxial cables for high frequency 7 to carry out the collection of transient earthing transient voltage signal, is uploaded to data server 12 by 485 buses 11 more at last.Put characteristic if the pulsed current signal that monitors and transient earthing transient voltage satisfy office, then can judge shelf depreciation occured in the switch cubicle 1 one time, then can arrange interruption maintenance, avoid the further deterioration of equipment, ensure the high-tension switch cabinet safe operation.
Be mainly used in judging qualitatively having or not of Partial discharge signal, so for this situation, our utility model a kind of partial discharge of switchgear on-line monitoring system based on pulse current method and ground electric wave method, adopt the high-frequency electrical pulses flow sensor to be nested on the line outlet cable shielding layer earthing line of switch cubicle and obtain pulsed current signal, the ground radio wave sensor sticks on and obtains the transient earthing transient voltage that produces owing to electromagnetic wave on the switch board housing cabinet surface, and the monitoring switch cabinet is in the normal shelf depreciation that whether occured in service simultaneously.Be convenient to judge source and the feature of signal, reliability sensitivity and accuracy high, easy for installation, that test is high.Can effectively solve defective and the deficiency of existing partial discharge of switchgear on-line monitoring.
Claims (2)
1. partial discharge of switchgear on-line monitoring system based on pulse current method and ground electric wave method is characterized in that: comprise data server (12), office put monitoring terminal (9), office put monitoring terminal (10), high-frequency electrical pulses flow sensor (5), radio wave sensor (2); Data server (12) is positioned over transformer station's master-control room, office puts monitoring terminal (9) drawn game and puts the instrument cabinet that monitoring terminal (10) is positioned over switch cubicle (1), high-frequency electrical pulses flow sensor (5) is nested on the line outlet cable shielding layer earthing line (4) of switch cubicle (1), and ground radio wave sensor (2) sticks on switch cubicle (1) the shell cabinet surface; High-frequency electrical pulses flow sensor (5) and ground radio wave sensor (2) adopt the magnetic coupling mode to work, the transient earthing transient voltage of the pulse current of (4) and electromagnetic wave generation on the monitoring cable shielding layer grounding line is put field monitoring for the office of high-tension switch cabinet (1) respectively; Data server (12) is put monitoring terminal (9) drawn game with office respectively and is put monitoring terminal (10) and adopt 485 communication buses (11) to be connected, office puts monitoring terminal (9) and adopts coaxial cable for high frequency (6) to be connected with high-frequency electrical pulses flow sensor (5), and office puts monitoring terminal (10) and adopts coaxial cable for high frequency (7) to be connected with ground radio wave sensor (2).
2. according to claim 1 a kind of based on the partial discharge of switchgear on-line monitoring system of pulse current method with ground electric wave method, it is characterized in that: the monitoring frequency range of high-frequency electrical pulses flow sensor (5) is 10M-100MHZ; Ground radio wave sensor (2) monitoring frequency range is 4M-100MHz, can effectively avoid the following low-frequency interference signal of 4M and carrier signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220525370 CN202916392U (en) | 2013-01-30 | 2013-01-30 | Online monitoring system for partial discharge of switch cabinet based on pulse current method and grounding electric wave method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220525370 CN202916392U (en) | 2013-01-30 | 2013-01-30 | Online monitoring system for partial discharge of switch cabinet based on pulse current method and grounding electric wave method |
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| CN202916392U true CN202916392U (en) | 2013-05-01 |
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| CN 201220525370 Expired - Lifetime CN202916392U (en) | 2013-01-30 | 2013-01-30 | Online monitoring system for partial discharge of switch cabinet based on pulse current method and grounding electric wave method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323750A (en) * | 2013-05-30 | 2013-09-25 | 孟津县电业公司 | Detection method and device for abnormal sounds of high-voltage sealing switch cabinet or sealing bus |
| CN103513169A (en) * | 2013-10-18 | 2014-01-15 | 国网上海市电力公司 | High voltage cable partial discharge detection method |
| CN103630813A (en) * | 2013-12-05 | 2014-03-12 | 国网上海市电力公司 | Solid insulated conductor insulation electrified monitoring method |
| CN103698674A (en) * | 2014-01-02 | 2014-04-02 | 国家电网公司 | Flow cable partial discharge online monitoring system |
| CN106771922A (en) * | 2016-12-28 | 2017-05-31 | 华中科技大学 | A kind of high-tension electricity system of detecting partial discharge in equipment and Recognition of Partial Discharge |
| CN108732478A (en) * | 2018-09-10 | 2018-11-02 | 清华四川能源互联网研究院 | Partial discharge of switchgear on-line monitoring system based on superfrequency punching current sensor and method |
| CN109828189A (en) * | 2019-02-19 | 2019-05-31 | 福建聚实新能源科技有限公司 | Partial discharge on-Line Monitor Device, system and method based on ubiquitous electric power Internet of Things |
| CN110286304A (en) * | 2019-07-15 | 2019-09-27 | 哈尔滨理工大学 | A kind of ring network cabinet local discharge on-line monitoring device |
-
2013
- 2013-01-30 CN CN 201220525370 patent/CN202916392U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323750A (en) * | 2013-05-30 | 2013-09-25 | 孟津县电业公司 | Detection method and device for abnormal sounds of high-voltage sealing switch cabinet or sealing bus |
| CN103323750B (en) * | 2013-05-30 | 2016-06-01 | 国家电网公司 | For the different sound inspection method of high pressure seal switching cabinet or sealing bus bar and inspection units |
| CN103513169A (en) * | 2013-10-18 | 2014-01-15 | 国网上海市电力公司 | High voltage cable partial discharge detection method |
| CN103630813A (en) * | 2013-12-05 | 2014-03-12 | 国网上海市电力公司 | Solid insulated conductor insulation electrified monitoring method |
| CN103630813B (en) * | 2013-12-05 | 2016-08-31 | 国网上海市电力公司 | A kind of method of solid insulation conductor insulation live monitoring |
| CN103698674A (en) * | 2014-01-02 | 2014-04-02 | 国家电网公司 | Flow cable partial discharge online monitoring system |
| CN106771922A (en) * | 2016-12-28 | 2017-05-31 | 华中科技大学 | A kind of high-tension electricity system of detecting partial discharge in equipment and Recognition of Partial Discharge |
| CN106771922B (en) * | 2016-12-28 | 2019-06-18 | 华中科技大学 | A kind of high-tension electricity system of detecting partial discharge in equipment and Recognition of Partial Discharge |
| CN108732478A (en) * | 2018-09-10 | 2018-11-02 | 清华四川能源互联网研究院 | Partial discharge of switchgear on-line monitoring system based on superfrequency punching current sensor and method |
| CN109828189A (en) * | 2019-02-19 | 2019-05-31 | 福建聚实新能源科技有限公司 | Partial discharge on-Line Monitor Device, system and method based on ubiquitous electric power Internet of Things |
| CN110286304A (en) * | 2019-07-15 | 2019-09-27 | 哈尔滨理工大学 | A kind of ring network cabinet local discharge on-line monitoring device |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 1 No. 8, Torch Road, Xincheng District, Shaanxi, Xi'an 710043 Patentee after: Liang Hongjun Address before: 710075, building 8, digital building, No. five, 1501 hi tech Zone, Xi'an, Shaanxi Patentee before: Liang Hongjun |
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| ASS | Succession or assignment of patent right |
Owner name: SHAANXI PUBLIC INTELLIGENT TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: LIANG HONGJUN Effective date: 20130724 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Free format text: CORRECT: ADDRESS; FROM: 710043 XI'AN, SHAANXI PROVINCE TO: 710065 XI'AN, SHAANXI PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20130724 Address after: 710065 Shaanxi city of Xi'an province high tech Zone Fenghui Road No. 34 Building 1, unit 1, room 11502 Patentee after: SHAANXI PUBLIC INTELLIGENT TECHNOLOGY CO.,LTD. Address before: 1 No. 8, Torch Road, Xincheng District, Shaanxi, Xi'an 710043 Patentee before: Liang Hongjun |
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| CX01 | Expiry of patent term |
Granted publication date: 20130501 |
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| CX01 | Expiry of patent term |