CN203479974U - High frequency current calibrating device applied to mining high-voltage cable partial discharge detection - Google Patents
High frequency current calibrating device applied to mining high-voltage cable partial discharge detection Download PDFInfo
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- CN203479974U CN203479974U CN201320598779.2U CN201320598779U CN203479974U CN 203479974 U CN203479974 U CN 203479974U CN 201320598779 U CN201320598779 U CN 201320598779U CN 203479974 U CN203479974 U CN 203479974U
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- frequency current
- coil
- voltage cable
- partial discharge
- discharge detection
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Abstract
The utility model discloses a high frequency current calibrating device applied to mining high-voltage cable partial discharge detection. The high frequency current calibrating device includes an insulation housing, a high-frequency current coil, a pulse controller, and a chargeable lithium battery. The device can simulate partial discharging types of internal discharging, discharging along surface, or corona discharge in a mining high-voltage cable. The high frequency current calibrating device for mining high-voltage cable partial discharge detection is particularly suitable for the partial discharge capacity calibration and the partial discharge capacity type identification of the mining high-voltage cable.
Description
[technical field]
The utility model relates to the detection in mine high-voltage cable Partial Discharge Detection and location technology in mine, particularly the high-frequency current calibration equipment in a kind of mine high-voltage cable Partial Discharge Detection.
[background technology]
Cable in mine power equipment is the key equipment of colliery electric power transfer safety in production, is undertaking the important task of safety in production.The accident statistics data of 2005-2010 show: directly Electromechanical Accidents death toll occupies the 5th, and the gas explosion accident indirectly being caused by Electromechanical Accidents accounts for gas accident sum 48.1%, and the mine fire accident indirectly causing accounts for 80% of fire failure sum.In Electromechanical Accidents, high-tension cable catches fire and is the main cause of such accident, and 5 of the above great and special fire disaster accidents of dead 10 people occur once national colliery in 2010 altogether, and wherein Electromechanical Accidents accounts for 4, these 4 accidents are that cable is aging catch fire due to.Therefore, carry out insulation defect genesis mechanism research in mine power equipment, and then the condition monitoring system of exploitation mine power equipment, extract early warning information and carry out the insulation state monitoring of mine power equipment, to reducing mine frequency of power cut, reduce mine power off time, guaranteeing that downhole safety electricity consumption has important practical significance.
At present, band electro-detection be take non-intrusion type detection method for local discharge as main, invention several different methods is monitored the shelf depreciation of power cable both at home and abroad, mainly contain high-frequency current pulse method and supercritical ultrasonics technology and ultrahigh frequency method etc. (Zheng Wendong. experimental study [J] the .2011. Li Tian of multisensor associated detection technique in XLPE cable annex shelf depreciation location is outstanding. the selection Discussion on Technology [J] of colliery cable. science and technology and enterprise, 2013, (03): 294. Li Haiying, Li Xuan, Song Jiancheng. the mine high-voltage cable safe early warning model [J] based on radar map method. coal journal, 2012, (11): 1941-1946. Feng Dewang, Liu Wenhu. the impact [J] of mine cable sheath on electrical fast transient (eft) induction coupling. Institutes Of Technology Of Taiyuan's journal, 2012, (02): 139-143 opens pretty peace .XLPE cable accessory shelf depreciation UHF and VHF joint-detection [J] .2011. Cao Yong army. the searching and process [J] of mine underground cable fault. Shaanxi coal, 2011, (01): 88-89+113.).
Yet, in production practices, find, also there are some problems in the mine cable shelf depreciation technology based on high-frequency current method.The assessment that mainly comprises partial discharges fault type and partial discharge quantity does not have generating means.Cause thus each producer to detect data inconsistent, Data Comparison is analyzed difficulty.Therefore, the high-frequency current calibration equipment in design mine high-voltage cable Partial Discharge Detection, can solve the problems referred to above that face in mine high-voltage cable Partial Discharge Detection.
[utility model content]
To achieve these goals, the utility model provides the high-frequency current calibration equipment in a kind of mine high-voltage cable Partial Discharge Detection, and this device can be simulated in mine high-voltage cable the pulse sequence signal corresponding to shelf depreciation types such as internal discharge, creeping discharge and corona discharges.
The utility model adopts following technical scheme:
High-frequency current calibration equipment in a kind of mine high-voltage cable Partial Discharge Detection, comprise insulation crust, impulse controller and high-frequency current coil are installed in described insulation crust, and one end of described impulse controller is connected with power supply, and the other end is connected with high-frequency current coil.
As preferred embodiment of the present utility model, described power supply is charged lithium cells, and this charged lithium cells is connected with outside charger by charging inlet.
As preferred embodiment of the present utility model, described charging inlet is waterproof plug, and degree of protection is IP65.
As preferred embodiment of the present utility model, described high-frequency current coil consists of the Rogowsky coil with driving signal input interface.
Described high-frequency current coil is mainly comprised of pincerlike shell, magnetic core, coil, integrating resistor, passive bandpass filters, discharge tube, BNC connector; Described coil winding is peripheral at magnetic core, described magnetic core is arranged in pincerlike shell, an end of described coil is drawn and is connected with BNC connector by passive bandpass filters from pincerlike shell, after described integrating resistor and discharge tube series connection, be connected to BNC connector two ends, and the node between integrating resistor and discharge tube is connected with the input end of passive bandpass filters.
Described impulse controller mainly consists of FPGA, DAC and DDR2; One end of FPGA is connected with DDR2, and the other end is connected with DAC; The other end of described DAC drives signal input interface to be connected by power amplifier with the band of high-frequency current coil, and signal is outputed to high-frequency current coil.
Described FPGA selects EP4CE15 family chip.
Described coil is Rogowsky coil, and internal diameter is 8cm, and frequency band is 1kHz-5MHz.
Described coil adopts air core coil structure.
Described insulation crust is epoxy resin material, and tolerance is not less than 20kV voltage.
Compared with prior art, the utlity model has following beneficial effect:
1, transmitting coil shell and host housing all have dielectric level and the flame proof requirement of mine field requirement, have guaranteed security when user of service operates this instrument;
While 2, carrying out field monitoring, operating personnel only need be arranged on pincerlike dispatch coil on cable grounding line, by impulse ejection main frame, can launch the pulse signal of varying strength and frequency, by calculating the mistiming of transponder pulse and reflected impulse, can accurately calculate the velocity of propagation of pulse in cable; By calculating the difference in magnitude of transponder pulse and reflected impulse, the attenuation coefficient in the time of can accurately calculating pulse edge cable transmission, thus can diagnose out whether shelf depreciation orientation discharge point occur in cable.
[accompanying drawing explanation]
Fig. 1 is the structural representation of the high-frequency current calibration equipment in the utility model mine high-voltage cable Partial Discharge Detection.
Fig. 2 is that the impulse controller of the high-frequency current calibration equipment in the utility model mine high-voltage cable Partial Discharge Detection forms schematic diagram.
Fig. 3 is the high-frequency current coil basic structure schematic diagram of the high-frequency current calibration equipment in the utility model mine high-voltage cable Partial Discharge Detection.
Wherein, charging inlet 11, charged lithium cells 12, impulse controller 13, high-frequency current coil 14, insulation crust 15, field programmable gate array (FPGA) 21, high-speed digital-analog conversion chip (DAC) 22, high-speed internal memory (DDR2) 23, pincerlike sensor outer housing 31, magnetic core 32, coil 33, integrating resistor 34, passive bandpass filters 35, sensor discharge tube 36, BNC connector 37.
[embodiment]
Below be only the general introduction of technical solutions of the utility model, in order to better understand technological means of the present utility model, below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
High-frequency current calibration equipment structure in the utility model mine high-voltage cable Partial Discharge Detection as shown in Figure 1, comprise insulation crust 15, in insulation crust 15, be provided with the charging inlet 11, charged lithium cells 12, impulse controller 13 and the high-frequency current coil 14 that connect successively, wherein:
Described charging inlet 11 is waterproof plug, and degree of protection is IP65.
One end of described charged lithium cells 12 is connected with external charger by the charging inlet 11 on insulation crust 15, and other one end of charged lithium cells 12 is connected with impulse controller 13, for impulse controller 13 provides power supply.
High-frequency current coil 14 drives the Rogowsky coil of signal input interface to form by band, and structure as shown in Figure 3, is mainly comprised of pincerlike shell 31, magnetic core 32, coil 33, integrating resistor 34, passive bandpass filters 35, discharge tube 36, BNC connector 37.Described coil 33 is wrapped in magnetic core 32 peripheries, described magnetic core 32 is arranged in pincerlike shell 31, an end of described coil is drawn and is passed through passive bandpass filters 35 from pincerlike shell and is connected with BNC connector 37, after described integrating resistor 34 and discharge tube 36 series connection, be connected to BNC connector 37 two ends, and the node between integrating resistor 34 and discharge tube 36 is connected with the input end of passive bandpass filters 35.
The basic structure of described impulse controller 13 is consulted shown in Fig. 2, and described impulse controller 13 is fixed in insulation crust 15, mainly on-site programmable gate array FPGA 21, high-speed digital-analog conversion chip DAC22 and high-speed internal memory DDR223, consists of.On-site programmable gate array FPGA 21 produces various discharge data; One end of on-site programmable gate array FPGA 21 is connected with jumbo high-speed internal memory 23, stores discharge data into jumbo high-speed internal memory 23, and the other end of on-site programmable gate array FPGA 21 is connected with one end of high-speed digital-analog conversion chip DAC22; The other end of high-speed digital-analog conversion chip DAC22 drives signal input interface to be connected by power amplifier with the band of high-frequency current coil 14, and signal is outputed to high-frequency current coil 14.
Above-mentioned on-site programmable gate array FPGA is selected the EP4CE15 family chip of ALTERA company, can support DDR2 memory interface, and IO interface is supported the logic level devices such as 1.5-V, 1.8-V, 2.5-V and 3.3-V.
Above-mentioned coil 14 is Rogowsky coil, and internal diameter is 8cm, and frequency band is 1kHz-5MHz, adopts air core coil structure, and coil material is high frequency material.
Above-mentioned insulation crust 15 is epoxy resin material, can tolerate and be not less than 20kV voltage.
High-frequency current calibration equipment in the utility model mine high-voltage cable Partial Discharge Detection is used in following two aspects:
1. the discharge capacity of electric wave signal is demarcated over the ground:
User is by the high-speed digital-analog conversion chip (DAC) in device, the output intensity of adjustable ground electric wave signal.Signal output intensity has a plurality of class, and therefore the discharge capacity that every kind of class is corresponding different utilizes the size of output signal discharge capacity, can demarcate discharge capacity.
2. the discharge mode that electric wave detects is over the ground identified:
The electric discharge type data of use device mass memory stores, produce various types of discharge signals.The feature of every kind of electric discharge type signal is different, and the characteristic signal that base area radio wave sensor detects, can judge discharge mode.
The utlity model has following advantage: 1. the utility model local discharge signal pattern can be stored, guarantee accuracy and the repeatability of local discharge signal pattern.2., when the utility model scene is used, operating personnel only need block cable by analogue means, then use High Frequency Current Sensor in cable place image data, just can realize the identification to the demarcation of discharge capacity and discharge mode.
The above, be only preferred embodiment of the present utility model, not the utility model done to any pro forma restriction.Those skilled in the art utilize the technology contents of above-mentioned announcement to make a little simple modification, equivalent variations or modification, all drop in protection domain of the present utility model.
Claims (10)
1. the high-frequency current calibration equipment in a mine high-voltage cable Partial Discharge Detection, it is characterized in that, comprise insulation crust (15), impulse controller (13) and high-frequency current coil (14) are installed in described insulation crust (15), one end of described impulse controller is connected with power supply, and the other end is connected with high-frequency current coil.
2. the high-frequency current calibration equipment in mine high-voltage cable Partial Discharge Detection as claimed in claim 1, is characterized in that: described power supply is charged lithium cells (12), and this charged lithium cells is connected with outside charger by charging inlet (11).
3. the high-frequency current calibration equipment in mine high-voltage cable Partial Discharge Detection as claimed in claim 2, is characterized in that: described charging inlet (11) is waterproof plug, and degree of protection is IP65.
4. the high-frequency current calibration equipment in mine high-voltage cable Partial Discharge Detection as claimed in claim 1, is characterized in that: described high-frequency current coil (14) drives the Rogowsky coil of signal input interface to form by band.
5. the high-frequency current calibration equipment in the mine high-voltage cable Partial Discharge Detection as described in claim 1 or 4, is characterized in that: described high-frequency current coil (14) is mainly comprised of pincerlike shell (31), magnetic core (32), coil (33), integrating resistor (34), passive bandpass filters (35), discharge tube (36), BNC connector (37); Described coil (33) is wrapped in magnetic core (32) periphery, described magnetic core (32) is arranged in pincerlike shell (31), an end of described coil is drawn and is passed through passive bandpass filters (35) from pincerlike shell and is connected with BNC connector (37), after described integrating resistor (34) and discharge tube (36) series connection, be connected to BNC connector (37) two ends, and the node between integrating resistor (34) and discharge tube (36) is connected with the input end of passive bandpass filters (35).
6. the high-frequency current calibration equipment in mine high-voltage cable Partial Discharge Detection as claimed in claim 1, is characterized in that: described impulse controller (13) is mainly by FPGA(21), DAC(22) and DDR2(23) form; FPGA(21) one end is connected with DDR2, the other end and DAC(22) be connected; Described DAC(22) the other end drives signal input interface to be connected by power amplifier with the band of high-frequency current coil (14), and signal is outputed to high-frequency current coil (14).
7. the high-frequency current calibration equipment in mine high-voltage cable Partial Discharge Detection as claimed in claim 6, is characterized in that: described FPGA selects EP4CE15 family chip.
8. the high-frequency current calibration equipment in mine high-voltage cable Partial Discharge Detection as claimed in claim 5, is characterized in that: described coil (14) is Rogowsky coil, and internal diameter is 8cm, and frequency band is 1kHz-5MHz.
9. the high-frequency current calibration equipment in mine high-voltage cable Partial Discharge Detection as claimed in claim 8, is characterized in that: described coil (14) adopts air core coil structure.
10. the high-frequency current calibration equipment in mine high-voltage cable Partial Discharge Detection as claimed in claim 1, is characterized in that: described insulation crust (15) is epoxy resin material, and tolerance is not less than 20kV voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320598779.2U CN203479974U (en) | 2013-09-26 | 2013-09-26 | High frequency current calibrating device applied to mining high-voltage cable partial discharge detection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320598779.2U CN203479974U (en) | 2013-09-26 | 2013-09-26 | High frequency current calibrating device applied to mining high-voltage cable partial discharge detection |
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| CN203479974U true CN203479974U (en) | 2014-03-12 |
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|---|---|---|---|
| CN201320598779.2U Expired - Fee Related CN203479974U (en) | 2013-09-26 | 2013-09-26 | High frequency current calibrating device applied to mining high-voltage cable partial discharge detection |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007371A (en) * | 2014-05-15 | 2014-08-27 | 深圳供电局有限公司 | Device and method used for checking partial discharge signals of cable |
| CN105652064A (en) * | 2014-12-01 | 2016-06-08 | 三星电子株式会社 | Voltage measurement device and voltage sensor |
| CN106249119A (en) * | 2016-08-30 | 2016-12-21 | 合肥智博电气有限公司 | High-voltage cable insulating detection device |
-
2013
- 2013-09-26 CN CN201320598779.2U patent/CN203479974U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007371A (en) * | 2014-05-15 | 2014-08-27 | 深圳供电局有限公司 | Device and method used for checking partial discharge signals of cable |
| CN105652064A (en) * | 2014-12-01 | 2016-06-08 | 三星电子株式会社 | Voltage measurement device and voltage sensor |
| CN106249119A (en) * | 2016-08-30 | 2016-12-21 | 合肥智博电气有限公司 | High-voltage cable insulating detection device |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20140312 Termination date: 20160926 |