CN202351380U - Partial discharge positioner for switch cabinet - Google Patents
Partial discharge positioner for switch cabinet Download PDFInfo
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- CN202351380U CN202351380U CN2011204700442U CN201120470044U CN202351380U CN 202351380 U CN202351380 U CN 202351380U CN 2011204700442 U CN2011204700442 U CN 2011204700442U CN 201120470044 U CN201120470044 U CN 201120470044U CN 202351380 U CN202351380 U CN 202351380U
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- switch cubicle
- sensor
- shelf depreciation
- unit
- orientator
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Abstract
The utility model discloses a partial discharge positioner for a switch cabinet. The partial discharge positioner comprises two sensors which can be attached to the surface of the switch cabinet and a control host which can be connected with the two sensors, wherein each sensor acquires transient earth voltage which is generated on the surface of the switch cabinet by partial discharge and transmits a signal which is obtained to the control host; the control host mainly comprises a data acquisition and input unit, a data processing unit, a data storage unit, a display unit, a control unit and an output unit; the data acquisition and input unit can be connected with each sensor and used for filtering partial discharge data which are acquired by the sensor, automatically regulating a trigger threshold value and then sending the partial discharge data into the data processing unit; and the data processing unit is respectively connected with the data storage unit, the display unit, the control unit and the output unit. The partial discharge positioner for the switch cabinet can effectively judge whether the partial discharge of the switch cabinet exists and can accurately position the partial discharge.
Description
Technical field
The utility model relates to the local discharge signal pick-up unit of power high voltage switch electrical equipment, relates to a kind of switch cubicle shelf depreciation orientator in particular, and it can effectively detect the high-tension switch cabinet shelf depreciation under the state that does not have a power failure and locate.
Background technology
The switchgear that high-tension switch cabinet is to use is extremely wide, quantity is maximum and since design, manufacturing, installation and operation safeguard aspect the problem of various degrees, thereby accident rate is than higher.Often accidents caused because of reasons such as filthy, insulation weakness, toy intrusions simultaneously; Show as external insulation flashover breakdown over the ground, interior insulation is flashover breakdown over the ground, the phase insulation flashover breakdown; The lightning surge flashover breakdown; Porcelain vase bushing flashover, pollution flashover, puncture, blast, CT flashover, puncture, blast, porcelain insulator breaking etc.
At present; Management method to the switch cubicle maintenance in the electric system mainly is through " the power equipment preventive trial rules " project and corresponding test period to the switch cubicle defined; Regularly under power down mode, carry out the inspectability test of insulating property, preventive trial only belongs to a kind of planned maintenance mode; Long-term working experience shows that such maintenance system has its certain limitation, is embodied as:
One, the otherness of equipment operating environment is not considered in cycled recondition, and all devices is all taked same inspection standard, and contradiction promptly not enough in maintenance, that overhaul between excessive and the maintenance blindness three is comparatively outstanding.
Two, periodic test and overhaul all need be carried out under the power failure condition, and Gu Qihui causes very big direct and indirect economic loss.
Three, because traditional preventive trial is under the condition that has a power failure, to carry out, with equipment actual operating state difference to some extent always; Therefore, have only the defective that just can embody under the running environment at the scene, under test condition, can't find, possibly cause the potential insulation defect of equipment for some.
Four, the development of the deterioration of apparatus insulated intensity and defective has timeliness, generally all is slowly to develop and have certain latent period, and therefore for the cycled recondition mode, the qualitative change of the state of insulation of equipment might occur between twice time between overhauls(TBO).
Along with modern age sensor technology, signal processing technology, electronics and photoelectron technology, development of computer, greatly improved the sensitivity and the reliability of detecting instrument.Present domestic Partial Discharge Detecting Technology has also obtained developing rapidly; The detection method of shelf depreciation has electrical measuring method and non-electrical measuring method by the physical quantity character branch that detects at present; Various in electric discharge phenomena according to what produced in the shelf depreciation process, the detection technique of corresponding appearance mainly contains: pulse current method, leakage or be situated between damage, radio frequency detection method, ultrahigh frequency method, sound detection, flash spotting and chemical measure.
Wherein, Thereby judge whether have partial discharge phenomenon through the electromagnetic wave signal that detects the shelf depreciation generation; It is technology relatively more commonly used at present; Be widely used in the relevant detection product, but had a lot of weak, weak points, like the problems such as interference of the location of shelf depreciation point, data recording storage, derivation, external electromagnetic.
In view of this, the inventor has this case to produce to the above-mentioned defective further investigation of prior art when local point of discharge is positioned then.
The utility model content
The purpose of the utility model is to provide a kind of switch cubicle shelf depreciation orientator, and it can effectively detect having or not of shelf depreciation, and can carry out accurate localization to shelf depreciation.
In order to reach above-mentioned purpose, the solution of the utility model is:
A kind of switch cubicle shelf depreciation orientator; Wherein, Comprise two sensors that all can be close to switch cubicle surface and can with these two main control systems that sensor all links to each other; This each sensor all gather transient state voltage-to-ground that shelf depreciation produces on switch cubicle surface and with the signal conveys that obtains to main control system; This main control system has data acquisition and input block, data processing unit, data storage cell, display unit, control module and output unit at least; This data acquisition and input block can link to each other with each sensor and the shelf depreciation data of its collection are carried out filtering, automatic adjusting triggering threshold values and sent into data processing unit, and this data processing unit then links to each other with data storage cell, display unit, control module and output unit respectively.
Further; This each sensor all has the capacitance coupling type sensing element; This capacitance coupling type sensing element is built in the front portion of sensor, and is close in when test and switch cubicle metal surface and detects the size of shelf depreciation at the transient state voltage-to-ground of switch cubicle surface generation.
Further; This each sensor also all has transistor numeral display control module, pilot lamp, feature operation button control module, function handover module and action button; This action button links to each other with feature operation button control module, and this pilot lamp, function handover module and feature operation button control module all link to each other with transistor numeral display control module.
Further, this each sensor also has BNC connector, and this BNC connector links to each other with main control system and detected signal magnitude is sent in the main control system.
Further, this main control system also has charging and the battery information unit that can monitor in real time instrument battery electric quantity size.
Further, this main control system also has the communication interface unit that can link to each other with host computer.
Further, these two sensor installing spaces are greater than 600mm.
After adopting said structure; A kind of switch cubicle shelf depreciation orientator that the utility model relates to; It is through being provided with two sensors and main control system, when whether it exists shelf depreciation at needs detector switch cabinet, can only let a sensor link to each other with main control system and carries out testing; And when needs are accurately located shelf depreciation, then can let two sensors work simultaneously and make the control module of main control system carry out analyzing and processing and obtain the exact position; The utility model can store and derive the on-the-spot data that detect owing to be provided with data storage cell, display unit and output unit in addition, is convenient to carry out follow-up data analysis.
Description of drawings
Fig. 1 is the detection synoptic diagram of sensor in the utility model relates to a kind of switch cubicle shelf depreciation orientator;
Fig. 2 is the principle schematic of a kind of switch cubicle shelf depreciation orientator when positioning detection for the utility model relates to;
Fig. 3 is the functional structure schematic diagram of main control system in the utility model.
Among the figure:
Switch cubicle shelf depreciation orientator 100
Data acquisition and input block 21 data processing units 22
Charging and battery information unit 27 communication interface units 28
Concentric cable 3 switch cubicles 200.
Embodiment
In order further to explain the technical scheme of the utility model, come the utility model is set forth in detail through concrete scheme below.
Extremely shown in Figure 3 like Fig. 1; A kind of switch cubicle 200 shelf depreciation orientators 100 that the utility model relates to; It comprises two sensors 1 and main frame 2; These two sensors 1 all can be close to switch cubicle 200 surfaces (as depicted in figs. 1 and 2), and this main frame 2 can all link to each other with these two sensors 1, and specifically it is to link to each other through concentric cable 3.
This each sensor 1 is all gathered shelf depreciation at the transient state voltage-to-ground of switch cubicle 200 surface generations and with the signal conveys that obtains to main frame 2; This main frame 2 has data acquisition and input block 21, data processing unit 22, data storage cell 23, display unit 24, control module 25 and output unit 26 at least; This data acquisition and input block 21 can link to each other with each sensor 1 and the shelf depreciation data of its collection are carried out filtering, automatic adjusting triggering threshold values and sent into data processing unit 22; 22 of this data processing units link to each other with data storage cell 23, display unit 24, control module 25 and output unit 26 respectively; 22 pairs of data of this data processing unit are carried out analysis and judgement; Deliver to data storage cell 23, display unit 24 and output unit 26 after rejecting relevant undesired signal; Data storage cell 23 is saved to corresponding data in the perhaps external storage medium of inner storage medium, and 24 of display units can show corresponding data on the touch-screen with on the sensor 1,26 output of output unit respective channel relative trigger pulse signal; Can be external to the oscillograph observation analysis, and then judge possible electric discharge type.Preferably; This main frame 2 also has charging and battery information unit 27, and instrument battery electric quantity size is monitored in real time, will shut down automatically when cell voltage is lower than setting value when monitoring; Automatically carry out the monitoring of charging current when charging in addition; Be built-in with overcurrent fuse simultaneously, in case opening circuit or overcharging appears in charging, instrument can carry out corresponding protection; This main frame 2 also has communication interface unit 28, and it can be realized and being connected of host computer, carry out associative operations such as software upgrading.
Like this; A kind of switch cubicle 200 shelf depreciation orientators 100 that the utility model relates to; It is through being provided with two sensors 1 and main frame 2, when whether it exists shelf depreciation at needs detector switch cabinet 200, can only let a sensor 1 link to each other with main frame 2 and carries out testing; And when needs are accurately located shelf depreciation, then can let two sensors 1 work simultaneously and make the control module 25 of main frame 2 carry out analyzing and processing and obtain the exact position; The utility model can store and derive the on-the-spot data that detect owing to be provided with data storage cell 23, display unit 24 and output unit 26 in addition, is convenient to carry out follow-up data analysis.
Preferably; This each sensor 1 all has the capacitance coupling type sensing element; This capacitance coupling type sensing element is built in the front portion of sensor 1, and is close in when test and switch cubicle 200 metal surfaces and detects the size of shelf depreciation at the transient state voltage-to-grounds of switch cubicle 200 surface generations.In addition; This each sensor 1 also all has transistor numeral display control module, pilot lamp, feature operation button control module, function handover module and action button; This action button links to each other with feature operation button control module, and this pilot lamp, function handover module and feature operation button control module all link to each other with transistor numeral display control module.This each sensor 1 also has BNC connector, and this BNC connector links to each other with main frame 2 and detected signal magnitude is sent in the main frame 2.
See also Fig. 1 and Fig. 2, the detection principle of the utility model is:
Insulation defects can cause the generation of partial discharge phenomenon in the switch cubicle 200, physics and chemical changes such as switch cubicle produces shelf depreciation can generation sound, light, electricity, heat; These characteristics all can be used as the sensing object of Partial Discharge Detection signal.
When switchgear insulating part generation internal discharge and corona discharge; To generate electromagnetic waves; These electromagnetic waves are gone out through the channels spread between the switch cubicle metal shell, and these passages possibly be interval, liner or other insulating elements between metal shell, when electromagnetic wave spreads out of metal cabinet; On the metal cabinet of switch cubicle, produce a transient state voltage-to-ground (TEV) simultaneously, transient state voltage-to-ground (TEV) has only several volts and can only keep several nanoseconds (ns); Thus, we can come internal discharge and corona discharge situation in the Test Switchboard equipment through placing a TEV sensor on the metal outer container shell of the switchgear that is in operation.
The utility model just is based on the detection of transient state voltage-to-ground (TEV) to the switch cubicle shelf depreciation; And the pulsating wave of the transient state voltage-to-ground that produces according to internal discharge arrives the required asynchronism(-nization) of diverse location; Record the time that transient state voltage-to-ground signal is arrived through comparing two sensors at diverse location, and relatively the method for discharge signal intensity size is confirmed the position that internal discharge takes place; The electromagnetic wave momentary pulse institute elapsed time that sends through two sensor point of discharges is confirmed the position of discharge activities, and principle is to adopt relatively that electromagnetic pulse arrives every needed time of sensor respectively.
System is triggered which passage of indication earlier, and then shows that which sensor is nearer from the electrical distance of point of discharge; Because pulse is propagated with the light velocity or near the light velocity, so must can differentiate the very little mistiming.The lowest resolution of product of the present invention was 2 nanoseconds, was equivalent to light and in air, passed by the used time of 600mm, must let the spacing of two sensors greater than 600mm thus; The time difference that the utility model adopts the comparison electromagnetic pulse to arrive at different sensors confirms that the method for point of discharge is superior to adopting comparison signal intensity to confirm the method for point of discharge in itself; Because electromagnetic repeatedly reflection possibly cause the amplitude measurement result undesired, promptly the utlity model has test effect more accurately.
Product form of above-mentioned embodiment and graphic and non-limiting the utility model and style, the those of ordinary skill of any affiliated technical field all should be regarded as not breaking away from the patent category of the utility model to its suitable variation or modification of doing.
Claims (7)
1. switch cubicle shelf depreciation orientator; It is characterized in that; Comprise two sensors that all can be close to switch cubicle surface and can with these two main control systems that sensor all links to each other; This each sensor all gather transient state voltage-to-ground that shelf depreciation produces on switch cubicle surface and with the signal conveys that obtains to main control system; This main control system has data acquisition and input block, data processing unit, data storage cell, display unit, control module and output unit at least; This data acquisition and input block can link to each other with each sensor and the shelf depreciation data of its collection are carried out filtering, automatic adjusting triggering threshold values and sent into data processing unit, and this data processing unit then links to each other with data storage cell, display unit, control module and output unit respectively.
2. a kind of switch cubicle shelf depreciation orientator as claimed in claim 1; It is characterized in that; This each sensor all has the capacitance coupling type sensing element, and this capacitance coupling type sensing element is built in the anterior of sensor and when test, is close to the switch cubicle metal surface and detects the size of shelf depreciation at the transient state voltage-to-ground of switch cubicle surface generation.
3. a kind of switch cubicle shelf depreciation orientator as claimed in claim 1; It is characterized in that; This each sensor also all has transistor numeral display control module, pilot lamp, feature operation button control module, function handover module and action button; This action button links to each other with feature operation button control module, and this pilot lamp, function handover module and feature operation button control module all link to each other with transistor numeral display control module.
4. a kind of switch cubicle shelf depreciation orientator as claimed in claim 1 is characterized in that this each sensor also has BNC connector, and this BNC connector links to each other with main control system and detected signal magnitude is sent in the main control system.
5. a kind of switch cubicle shelf depreciation orientator as claimed in claim 1 is characterized in that, this main control system also has charging and the battery information unit that can monitor in real time instrument battery electric quantity size.
6. a kind of switch cubicle shelf depreciation orientator as claimed in claim 1 is characterized in that this main control system also has the communication interface unit that can link to each other with host computer.
7. a kind of switch cubicle shelf depreciation orientator as claimed in claim 1 is characterized in that these two sensor installing spaces are greater than 600mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204700442U CN202351380U (en) | 2011-11-23 | 2011-11-23 | Partial discharge positioner for switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204700442U CN202351380U (en) | 2011-11-23 | 2011-11-23 | Partial discharge positioner for switch cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202351380U true CN202351380U (en) | 2012-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204700442U Expired - Lifetime CN202351380U (en) | 2011-11-23 | 2011-11-23 | Partial discharge positioner for switch cabinet |
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| CN (1) | CN202351380U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103217633A (en) * | 2013-03-28 | 2013-07-24 | 国家电网公司 | Sensor for detecting local discharge of high-voltage switch cabinet |
| CN106970306A (en) * | 2017-04-07 | 2017-07-21 | 亿科电气股份有限公司 | A kind of partial discharge of switchgear monitoring system and monitoring method |
| CN108169647A (en) * | 2018-03-08 | 2018-06-15 | 云南电网有限责任公司电力科学研究院 | A kind of PD meter for being used to detect high-tension switch cabinet |
-
2011
- 2011-11-23 CN CN2011204700442U patent/CN202351380U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103217633A (en) * | 2013-03-28 | 2013-07-24 | 国家电网公司 | Sensor for detecting local discharge of high-voltage switch cabinet |
| CN106970306A (en) * | 2017-04-07 | 2017-07-21 | 亿科电气股份有限公司 | A kind of partial discharge of switchgear monitoring system and monitoring method |
| CN108169647A (en) * | 2018-03-08 | 2018-06-15 | 云南电网有限责任公司电力科学研究院 | A kind of PD meter for being used to detect high-tension switch cabinet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Unit E 21 layer ocean light No. 33 building, 361001 Xiamen Road, Siming District, Narcissus in Fujian Province Patentee after: Red phase Limited by Share Ltd Address before: Unit E 21 layer ocean light No. 33 building, 361001 Xiamen Road, Siming District, Narcissus in Fujian Province Patentee before: Xiamen Red Phase Instruments Inc. |
|
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 361001 one of the 1002 units of No. 3 Nantou Road, Siming District, Xiamen, Fujian. Patentee after: Red phase Limited by Share Ltd Address before: 361001 E 21 unit, Hai Guang building, 33 Narcissus Road, Siming Road, Xiamen, Fujian Patentee before: Red phase Limited by Share Ltd |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120725 |