CN201352250Y - Discharge device for detecting cable fault based on secondary pulse process - Google Patents
Discharge device for detecting cable fault based on secondary pulse process Download PDFInfo
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- CN201352250Y CN201352250Y CNU2008202284898U CN200820228489U CN201352250Y CN 201352250 Y CN201352250 Y CN 201352250Y CN U2008202284898 U CNU2008202284898 U CN U2008202284898U CN 200820228489 U CN200820228489 U CN 200820228489U CN 201352250 Y CN201352250 Y CN 201352250Y
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Abstract
The utility model discloses a discharge device for detecting cable fault based on the secondary pulse process, which comprises a discharge chamber. A fixed discharge ball and a moving discharge ball are arranged in the discharge chamber, the fixed discharge ball is connected with a high-voltage input end of the top of the discharge chamber, the moving discharge ball is connected with a motor arranged on one side of the discharge chamber via a horizontally rotating shaft and simultaneously is connected to a discharge output end of the other side of the discharge chamber, the motor controlled by a motor control panel can drive the moving discharge ball to rotate 180 degrees on a plane perpendicular to the rotating shaft, and a discharge gap Js is formed between the moving discharge ball and the fixed discharge ball. The discharge device is characterized in that a box body is arranged under the discharge chamber, a resistance box is disposed in the box body, one end of the resistance box is connected with an energy-storage capacitor terminal on one side of the box body while the other end is connected with a grounding terminal on the other side of the box body, and a secondary pulse generating and testing circuit is connected between the energy-storage capacitor terminal and the grounding terminal.
Description
Technical field
The utility model relates to the pick-up unit of power cable fault, particularly a kind of electric discharge device based on second pulse method detection streamer fault.
Background technology
When detecting power cable fault, existing proven technique is the pulse-reflection principle according to theory of travelling wave (being the radar reflection principle).Usual way has two kinds: Low Voltage Impulse Method; High voltage pulse method (flashover method).Broken string open fault that Low Voltage Impulse Method is mainly used to occur in the detection streamer and low-resistance short trouble, but this two classes fault is relatively more rare in practice, so Low Voltage Impulse Method is relatively poor to the applicability of failure mode.High voltage pulse method is mainly used to detect other the various types of high value faults except that above-mentioned two class faults, promptly give the cable fault phase by external dc high pressure (several Kv～hundreds of Kv), spark by the trouble spot in the cable, discharge back, trouble spot self produces an instantaneous pressure pulse and come back reflective between the test lead of trouble spot and cable, can pass through detecting instrument at test lead like this, note trouble spot reflection wave back and forth, by distance formula S=vt, and the adjacent twice reflection wave time, can calculate the distance of trouble spot to test lead.But because the complicacy of cable fault and give the added voltage of Method of Cable Trouble Point very high and do not have quantitative regularity factors such as (rule of thumb).The high-voltage pulse reflection configuration of trouble spot is more complicated often, and interference component is more, and the staff of no execute-in-place experience is difficult to grasp this technology.Comparatively speaking, the action of low-voltage pulse rule is to give failure cable by the pulse of about one tens volts of electric cable failure detector device (record tester) emissions itself.For the low-resistance short trouble, its test waveform disturbs little, and is well-behaved relatively, relatively good identification.Adopt the second pulse method can solve the existing problem of single impulse method preferably, so-called second pulse method is to produce circuit by a second pulse, utilizing ball-gap discharge to produce a high-voltage pulse makes the Method of Cable Trouble Point short circuit form delay, again the secondary low-voltage pulse is added to cable fault and forms the test waveform that interference is little, identity is strong mutually, can effectively detect the various high resistive faults of cable.A kind of typical pick-up unit as shown in Figure 1, wherein second pulse produce and test circuit be serially connected in ball crack Js and cable fault mutually between.This circuit has following deficiency:
1, second pulse generation and test circuit are connected in the high tension loop, and security is relatively poor relatively.
2, the volume of this device is bigger, weight heavy especially (kilogram up to a hundred), and on-the-spot use is not very convenient.
3, owing in the device power consumption component is arranged, high direct voltage is added to the energy of Method of Cable Trouble Point, generally will add about 50%.
Summary of the invention
The purpose of this utility model provides a kind of electric discharge device based on second pulse method detection streamer fault, can solve the safety issue of second pulse generation and test circuit.
For reaching above purpose, the utility model takes following technical scheme to be achieved:
A kind of electric discharge device based on second pulse method detection streamer fault, comprise an arc chamber, be provided with fixedly ball discharge and mobile ball discharge in this arc chamber, fixedly ball discharge is connected with the high voltage input terminal at arc chamber top, mobile ball discharge is connected with the motor that is arranged on arc chamber one side by a horizontal rotating shaft, and connect the discharge output terminal of arc chamber opposite side simultaneously, described motor is controlled by the Electric Machine Control plate and can drives mobile ball discharge and doing 180 degree rotations perpendicular to the plane of rotating shaft, mobile ball discharge and fixedly form discharging gap Js between the ball discharge, it is characterized in that, described arc chamber below is provided with a casing, be provided with resistance box in the casing, the energy storage capacitor terminal of this resistance box one end connect box one side, the ground terminal of other end connect box opposite side, described energy storage capacitor terminal, being used to connect second pulse between the ground terminal produces and test circuit.
In the such scheme, it is in parallel with a fixed resister R0 to be provided with a piezoresister R in the described resistance box.Described arc chamber is a transparent form.Described Electric Machine Control plate and energy supply power supply are arranged on bottom half.
The utility model is compared with the discharger of existing measurement circuit, its advantage is, second pulse takes place and test circuit is attempted by between high-voltage capacitance splicing ear and the ground terminal, can make second pulse generation and test circuit be in very low voltage status, and is as safe as a house reliable, they can unite two into one with electric discharge device simultaneously, volume is very little, and weight has only 2～3Kg, and test operation is convenient, simple and easy, safety, power consumption can significantly be reduced to 10%, and I is slightly disregarded.
Description of drawings
Fig. 1 is a kind of typical second pulse method proving installation wiring diagram.Among the figure: VT is a pressure regulator; PT is a high-tension transformer; D is a commutation diode; C is an energy-storage capacitor; Js is the ball discharge crack.
Fig. 2 is a structural drawing of the present utility model.Among the figure: 1, electric battery; 2, energy storage capacitor splicing ear; 3, casing; 4, discharge output terminal; 5, arc chamber; 6, mobile ball discharge; 7, fixing ball discharge; 8, high voltage input terminal; 9, fixing ball discharge connecting rod; 10, horizontal rotating shaft; 11, limit switch; 12, motor protects frame; 13, motor; 14, shaft coupling; 15, resistance box; 16, ground terminal; 17, control circuit board; R, piezoresister; R0, fixed resister.
Fig. 3 is the schematic circuit of the concrete application of Fig. 2 device in second pulse method proving installation.Empty frame is the electric discharge device schematic diagram of Fig. 2.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.
As shown in Figure 2, a kind of electric discharge device based on second pulse method detection streamer fault, comprise an arc chamber 5, this arc chamber 5 is a transparent form, wherein be provided with fixedly ball discharge 7 and mobile ball discharge 6, fixedly ball discharge 7 is connected with the high voltage input terminal 8 at transparent form top by connecting rod 9, and mobile ball discharge 6 is connected with the motor 13 that is arranged on arc chamber 5 one sides by a horizontal rotating shaft 10, and connecting the discharge output terminal 4 of arc chamber 5 opposite sides simultaneously, it is fixing that motor 13 protects frame 12 by a motor.Motor is controlled by Electric Machine Control plate 17 can do 180 degree rotations (limiting rotating range by limit switch 11) by the mobile ball discharge 6 of shaft coupling 14 drives that links to each other with horizontal rotating shaft 10 perpendicular to the plane of rotating shaft 10, mobile ball discharge 6 and fixedly form discharging gap Js between the ball discharge 7, when mobile ball discharge 6 moves to when fixedly ball discharge 7 same axis o are relative this discharging gap Js minimum.The transparent form below is provided with a casing 3, and Electric Machine Control plate 17 and energy supply electric battery 1 are arranged on casing 3 bottoms; It is in parallel with a fixed resister R0 to be provided with a piezoresister R above Electric Machine Control plate 17 and the energy supply electric battery in the casing, the energy storage capacitor terminal 2 of one end connect box one side, the ground terminal 16 of other end connect box opposite side, be exclusively used in the connection second pulse between energy storage capacitor terminal 2, the ground terminal 16 and produce and test circuit, concrete connection is referring to Fig. 3.
As shown in Figure 3, connect second pulse between energy storage capacitor terminal 2 of the present utility model, the ground terminal 16 and produce and test circuit, energy storage capacitor terminal 2 connects the following line end of energy storage capacitor C, ground terminal 16 ground connection simultaneously; Discharge output terminal 4 connects the fault phase of tested cable, and high voltage input terminal 8 connects the last line end of energy storage capacitor C, and connects high-tension transformer PT by commutation diode D.
The power of piezoresister R is greater than 5KW, and protection voltage is 1000～3000V, its effect be with ball crack Js sparking voltage Waveform Control in 1000～3000V, second pulse is produced and test circuit shields.The resistance of fixed resister R0 is 1K Ω, and power mainly plays the impedance matching effect greater than 100W.
Claims (4)
1, a kind of electric discharge device based on second pulse method detection streamer fault, comprise an arc chamber, be provided with fixedly ball discharge and mobile ball discharge in this arc chamber, fixedly ball discharge is connected with the high voltage input terminal at arc chamber top, mobile ball discharge is connected with the motor that is arranged on arc chamber one side by a horizontal rotating shaft, and connect the discharge output terminal of arc chamber opposite side simultaneously, described motor is controlled by the Electric Machine Control plate and can drives mobile ball discharge and doing 180 degree rotations perpendicular to the plane of rotating shaft, mobile ball discharge and fixedly form discharging gap Js between the ball discharge, it is characterized in that, described arc chamber below is provided with a casing, be provided with resistance box in the casing, the energy storage capacitor terminal of this resistance box one end connect box one side, the ground terminal of other end connect box opposite side, described energy storage capacitor terminal, being used to connect second pulse between the ground terminal produces and test circuit.
2, the electric discharge device based on second pulse method detection streamer fault as claimed in claim 1 is characterized in that, it is in parallel with a fixed resister R0 to be provided with a piezoresister R in the described resistance box.
3, the electric discharge device based on second pulse method detection streamer fault as claimed in claim 1 is characterized in that, described arc chamber is a transparent form.
4, the electric discharge device based on second pulse method detection streamer fault as claimed in claim 1 is characterized in that, described Electric Machine Control plate and energy supply power supply are arranged on bottom half.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202284898U CN201352250Y (en) | 2008-12-26 | 2008-12-26 | Discharge device for detecting cable fault based on secondary pulse process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202284898U CN201352250Y (en) | 2008-12-26 | 2008-12-26 | Discharge device for detecting cable fault based on secondary pulse process |
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| Publication Number | Publication Date |
|---|---|
| CN201352250Y true CN201352250Y (en) | 2009-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202284898U Expired - Fee Related CN201352250Y (en) | 2008-12-26 | 2008-12-26 | Discharge device for detecting cable fault based on secondary pulse process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109568A (en) * | 2009-12-28 | 2011-06-29 | 中国铝业股份有限公司 | Cable fault diagnosis device for direct current (DC) impulse voltage generator |
| CN105116282A (en) * | 2015-07-03 | 2015-12-02 | 国网辽宁省电力有限公司抚顺供电公司 | Remote discharging sphere gap controlling apparatus for cable fault test |
| CN106405170A (en) * | 2016-08-30 | 2017-02-15 | 西安华谱电力设备制造有限公司 | Integrated high frequency and high voltage power source |
| CN108133648A (en) * | 2017-12-05 | 2018-06-08 | 广东电网有限责任公司东莞供电局 | Simulation device for low resistance and flashover fault of medium-voltage cable |
-
2008
- 2008-12-26 CN CNU2008202284898U patent/CN201352250Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109568A (en) * | 2009-12-28 | 2011-06-29 | 中国铝业股份有限公司 | Cable fault diagnosis device for direct current (DC) impulse voltage generator |
| CN105116282A (en) * | 2015-07-03 | 2015-12-02 | 国网辽宁省电力有限公司抚顺供电公司 | Remote discharging sphere gap controlling apparatus for cable fault test |
| CN105116282B (en) * | 2015-07-03 | 2018-04-06 | 国网辽宁省电力有限公司抚顺供电公司 | A kind of cable fault test remote control ball discharge gap device |
| CN106405170A (en) * | 2016-08-30 | 2017-02-15 | 西安华谱电力设备制造有限公司 | Integrated high frequency and high voltage power source |
| CN106405170B (en) * | 2016-08-30 | 2019-09-10 | 西安华谱电力设备制造有限公司 | A kind of integral type high-frequency and high-voltage power supply |
| CN108133648A (en) * | 2017-12-05 | 2018-06-08 | 广东电网有限责任公司东莞供电局 | Simulation device for low resistance and flashover fault of medium-voltage cable |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091125 Termination date: 20151226 |
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| EXPY | Termination of patent right or utility model |