CN204065180U - A kind of wave of oscillation produces system and partial discharge detecting system - Google Patents
A kind of wave of oscillation produces system and partial discharge detecting system Download PDFInfo
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- CN204065180U CN204065180U CN201420560366.XU CN201420560366U CN204065180U CN 204065180 U CN204065180 U CN 204065180U CN 201420560366 U CN201420560366 U CN 201420560366U CN 204065180 U CN204065180 U CN 204065180U
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- 230000005611 electricity Effects 0.000 description 3
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- 238000009413 insulation Methods 0.000 description 2
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Abstract
The utility model discloses a kind of wave of oscillation and produce system and partial discharge detecting system.The wave of oscillation produces system and comprises direct supply, reactor, capacitive apparatus, voltage divider, gap of can controlling ball and opertaing device; The input termination civil power of direct supply, the output terminal of direct supply is successively through reactor and the capacitive apparatus ground connection of series connection; The tie point a point of capacitive apparatus and reactor is connected to a voltage divider, and a point pressure side for voltage divider is connected with opertaing device; The upper ball pole of gap of can controlling ball is connected with the tie point b point of reactor with direct supply, the lower ball pole ground connection of gap of can controlling ball; Lower ball extremely inside is embedded with a trigger, and trigger is connected with opertaing device, for generation of discharge spark, makes upper and lower ball pole puncture conducting, forms short circuit; The series loop that capacitive apparatus and reactor are formed produces voltage oscillation.Direct supply is connected with opertaing device.The utility model system architecture is simple, is easy to control, and is convenient to site test operation.
Description
Technical field
The utility model belongs to electrical engineering technical field, particularly relates to a kind of wave of oscillation and produces system and partial discharge detecting system.
Background technology
Damped oscillation wave voltage and alternating voltage have good equivalence, and compared with alternating voltage, Ultra-low Frenquency Voltage, action time is short, easy to operate, for high voltage capacitive apparatus (as power cable, capacitor etc.), utilize additional reactor to form series resonant tank and produce damped oscillation voltage wave, carry out withstand voltage test and shelf depreciation testing experiment, can effectively detect high voltage capacitive apparatus inherent vice, International Electrotechnical Commission recommends wave of oscillation test as the detection technique of power cable insulation state.High voltage capacitive apparatus produces the damping vibration attenuation wave of oscillation and has various ways, in order to form capacity reactance series resonant tank, some employing primary cut-outs, the employing high-tension electricity electronic switch also had; Isolating switch volume is larger, and high-tension electricity electronic switch controls complicated and cost is high, particularly for the wave of oscillation test carrying out 110kV above, it is very low that single power electronic devices can bear voltage, need tens devices in series could realize the high-tension electricity electronic switch of 110kV, make cost and equipment complexity more outstanding, be not easy to carry out site test.
Utility model content
The technical problems to be solved in the utility model is, for the situation of prior art and scene to the testing requirements producing oscillating voltage ripple, provide a kind of wave of oscillation to produce system and partial discharge detecting system, system architecture is simple and reliable, be easy to control, be convenient to site test operation.
The technical solution of the utility model is:
A kind of wave of oscillation produces system, it is characterized in that, comprises direct supply, reactor, capacitive apparatus, voltage divider, gap of can controlling ball and opertaing device;
The input termination civil power of direct supply, the output terminal of direct supply is successively through reactor and the capacitive apparatus ground connection of series connection; The tie point a point of capacitive apparatus and reactor is connected to a voltage divider, and a point pressure side for voltage divider is connected with opertaing device;
The upper ball pole of gap of can controlling ball is connected with the tie point b point of reactor with direct supply, the lower ball pole ground connection of gap of can controlling ball; The lower ball pole of gap of can controlling ball is arranged on a guide rod, and guide rod is driven can be moved up and down by motor, the upper spacing between ball pole and lower ball pole in gap thus adjustment can be controlled ball; The control end of motor is connected with the first output terminal of opertaing device; Lower ball extremely inside is embedded with a trigger, and trigger is connected with the second output terminal of opertaing device, for generation of discharge spark, makes upper and lower ball pole puncture conducting, forms short circuit;
Direct supply is connected with the 3rd output terminal of opertaing device.
Further, the output voltage range of described direct supply is 0 ~ 250kV, and described capacitive apparatus is 110kV electric pressure equipment.
Further, a current-limiting resistance is also serially connected with between described direct supply and b point.
Further, described reactor is many taps reactor.
Further, described voltage divider is RC divider.
A kind of partial discharge detecting system, comprise the above-mentioned wave of oscillation and produce system, also comprise a pulse coupler and a Partial discharge detector, described pulse coupler is serially connected between the ground lead of capacitive apparatus and ground, and Partial discharge detector is connected with pulse coupler.
Further, the signal frequency range that described pulse coupler can detect is 0 ~ 1MHz.
The wave of oscillation produces System Working Principle: first according to ball gap spacing---voltage breakdown curve map (or parameter list of ball gap product), and adjustment upper spacing size between ball pole with lower ball pole in gap of can controlling ball is ball gap spacing corresponding to trial voltage value; Then reach trial voltage value by direct supply to capacitive apparatus charging, then opertaing device control direct supply is stopped power supply; Last opertaing device controls lower ball and extremely goes up generation spark pulse, trigger sphere gap discharge breakdown, thus produces short circuiting arc, and the series loop that capacitive apparatus and reactor are formed produces voltage oscillation.The reactance value of coupling is selected according to the electric capacity size of capacitive apparatus.
Partial discharge detecting system principle of work is: first according to ball gap spacing---voltage breakdown curve map (or parameter list of ball gap product), and adjustment upper spacing size between ball pole with lower ball pole in gap of can controlling ball is ball gap spacing corresponding to trial voltage value; Reach trial voltage value by direct supply to capacitive apparatus charging again, then opertaing device control direct supply is stopped power supply; Then opertaing device controls lower ball and extremely goes up generation spark pulse, trigger sphere gap discharge breakdown, thus produces short circuiting arc, and the series loop that capacitive apparatus and reactor are formed produces voltage oscillation, and tested capacitive apparatus produces damped oscillation voltage; Last high-frequency impulse coupling mechanism gathers discharge pulse signal; The discharge pulse signal that measurement of partial discharge instrument is gathered by analysis of high frequency pulse coupler, detects the shelf depreciation situation of tested capacitive apparatus.
Beneficial effect:
1), system architecture is simple, can adapt to by adjustment sphere gap the wave of oscillation test carrying out different electric pressure;
2), Systematical control is simple and easy, is convenient to site test operation;
3), by pulse coupler gather Partial discharge signal, realize electrical isolation with capacitive apparatus, guarantee the person and device security.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the utility model embodiment;
Fig. 2 is the structural drawing of gap of can controlling ball;
Fig. 3 is ball gap spacing---voltage breakdown curve map,
Description of reference numerals:
1-gap of can controlling ball, 2-reactor, 3-capacitive apparatus, 4-direct supply, 5-opertaing device, 6-pulse coupler, 7-Partial discharge detector, 8-voltage divider, 9-current-limiting resistance; 10-upper ball pole, 11-spark point, 12-trigger, 13-lower ball pole, 14-motor; D-ball electrode diameter, d-ball gap spacing, Ud-breakdown voltage value.
Embodiment
Embodiment 1:
The wave of oscillation described in the utility model produces system, see Fig. 1, specifically comprises: direct supply 4, reactor 2, capacitive apparatus 3, voltage divider 8, gap of can controlling ball 1 and opertaing device 5; The input termination civil power of direct supply 4, direct supply 4, reactor 2 and capacitive apparatus 3 are connected successively, capacitive apparatus one end ground connection; The tie point a point of capacitive apparatus 3 and reactor 2 is connected to a voltage divider 8, and a point pressure side for voltage divider 8 is connected with opertaing device 5; The upper ball pole of gap of can controlling ball 1 is connected with the tie point b point of reactor 2 with direct supply 4, the lower ball pole ground connection of gap of can controlling ball; The lower ball pole of gap of can controlling ball is arranged on a guide rod, and guide rod is driven can be moved up and down by motor, the spacing of gap thus adjustment can be controlled ball; The control end of motor is connected with the first output terminal of opertaing device 5; Lower ball extremely inside is embedded with a trigger, and trigger is connected with the second output terminal of opertaing device 5, for generation of discharge spark, makes upper and lower ball pole puncture conducting, forms short circuit; Direct supply 4 is connected with the 3rd output terminal of opertaing device 5.
Reactor 2 and capacitive apparatus 3 are composed in series oscillation circuit, reactor 2 is with multiple tap, suitable reactance value can be selected according to the electric capacity size of capacitive apparatus, direct supply 4 applies test required voltage value according to setting, to connect a high-power current-limiting resistance 9 at direct supply 4 output terminal, reduce capacitive apparatus charging rate, after direct supply is pressurizeed, on capacitive apparatus, voltage slowly rises, detect that voltage reaches trial voltage value by voltage divider 8, namely stop direct supply 4 to pressurize by opertaing device 5.Opertaing device 5 is the core component of device, realizes controlling can control ball gap 1 and direct supply 4.
Gap of can controlling ball 1 is made up of upper and lower two hemispherical copper material electrodes, ball gap spacing can be adjusted by motor, lower semisphere pole is arranged on one and can slide up and down on guide rod, electric machine rotation is controlled by opertaing device 5, and by gear, guide rod is slided up and down, thus reach the object of adjustment ball gap spacing.The structural drawing of gap of can controlling ball, see Fig. 2, specifically comprises: upper ball pole 10 is fixing hemisphere electrode, and connect high-pressure side, lower ball pole 13 is movable hemisphere electrode, is connected with earth potential.It is inner that trigger 12 is embedded in lower ball pole 13, and trigger comprises an impulse capacitor, and impulse capacitor high pressure is a tip very, i.e. spark point 11, trigger 12 is controlled by opertaing device.Its principle is by charging to impulse capacitor, spark point 11 and lower ball pole 13 form a severe non-uniform electric field, when impulse capacitor voltage reaches certain value, discharge spark is produced between spark point 11 and lower ball pole 13, when high voltage is born in upper ball pole 10 and lower ball pole 13, discharge spark can cause upper and lower ball pole to puncture conducting, forms short circuit.Ball gap adjustment motor 14 can adjust by opertaing device gap spacing of can controlling ball.
Principle of work of the present utility model: first according to Fig. 3 ball gap spacing---voltage breakdown curve map (or parameter list of ball gap product), obtain the ball gap spacing size that trial voltage value is corresponding, adjust gap spacing of can controlling ball, make ball-handling gap spacing can bear trial voltage amplitude not puncture and to be unlikely to spacing too far away and be unfavorable for that spark triggers, then test required voltage value is reached by high-voltage DC power supply to capacitive apparatus charging, then opertaing device control high-voltage D.C. generator is stopped power supply, then dynamic ball extremely on produce a spark pulse cause ball-gap discharge to puncture, thus generation short circuiting arc, capacitive apparatus is made to become series loop to produce voltage oscillation with Reactor banks, tested capacitive apparatus thus bear damped oscillation voltage.
The utility model system architecture is simple and reliable, is applicable to capacitive apparatus and carries out wave of oscillation withstand voltage test or shelf depreciation test.For the capacitive apparatus wave of oscillation test carrying out voltage levels, only need to improve capacitive apparatus output voltage amplitude and the reactor class of insulation, and Reasonable adjustment can be controlled ball, gap spacing can realize, and controls simply to be convenient to site test operation.
Embodiment 2:
When carrying out wave of oscillation office and putting testing experiment, in ground lead and a pulse coupler 6 of connecting between ground of capacitive apparatus 3, and connect Partial discharge detector 7 to detect local discharge signal, form partial discharge detecting system described in the utility model, as shown in Figure 1.Pulse coupler gathers discharge pulse signal, and the pulse signal that pulse coupler gathers analyzed by measurement of partial discharge instrument, thus realizes detecting the inner shelf depreciation situation of capacitive apparatus.
Embodiment 3:
The present embodiment can be controlled ball the QX-1 type that gap 1 adopts Hunan, Hunan electric test research institute to develop, and ball polar diameter is 10cm, and 0 ~ 8cm is adjustable for ball gap spacing, can be applicable to 110kV and the test of the following capacitive apparatus wave of oscillation.The air reactor that reactor 2 adopts Shuande special transformer company to produce.The Wz-200-800 type product that direct supply 4 adopts Qidong City Hua Chuan power supply manufacturing plant to generate, most High Level DC Voltage is 200kV, power 800W, controls DC power output voltage size by external node.The DAC-I type that opertaing device 5 adopts Hunan, Hunan electric test research institute to develop, opertaing device take industrial computer as development platform, realizes the multiple functions such as control, signals collecting and process.The Rogowski coil that pulse coupler 6 adopts Hunan, Hunan electric test research institute to develop, and possess automatic compensation function.
The utility model is proved to be respond well through manufacturing experimently to try out, esy to use, safe and reliable, reaches designing requirement completely.
Claims (7)
1. the wave of oscillation produces a system, it is characterized in that, comprises direct supply, reactor, capacitive apparatus, voltage divider, gap of can controlling ball and opertaing device;
The input termination civil power of direct supply, the output terminal of direct supply is successively through reactor and the capacitive apparatus ground connection of series connection; The tie point a point of capacitive apparatus and reactor is connected to a voltage divider, and a point pressure side for voltage divider is connected with opertaing device;
The upper ball pole of gap of can controlling ball is connected with the tie point b point of reactor with direct supply, the lower ball pole ground connection of gap of can controlling ball; The lower ball pole of gap of can controlling ball is arranged on a guide rod, and guide rod is driven can be moved up and down by motor, the upper spacing between ball pole and lower ball pole in gap thus adjustment can be controlled ball; The control end of motor is connected with the first output terminal of opertaing device; Lower ball extremely inside is embedded with a trigger, and trigger is connected with the second output terminal of opertaing device, for generation of discharge spark, makes upper and lower ball pole puncture conducting, forms short circuit;
Direct supply is connected with the 3rd output terminal of opertaing device.
2. the wave of oscillation according to claim 1 produces system, and it is characterized in that, the output voltage range of described direct supply is 0 ~ 250kV, and described capacitive apparatus is 110kV electric pressure equipment.
3. the wave of oscillation according to claim 1 produces system, it is characterized in that, is also serially connected with a current-limiting resistance between described direct supply and b point.
4. the wave of oscillation according to claim 1 produces system, and it is characterized in that, described reactor is many taps reactor.
5. the wave of oscillation according to claim 1 produces system, and it is characterized in that, described voltage divider is RC divider.
6. a partial discharge detecting system, it is characterized in that, the wave of oscillation comprised according to any one of Claims 1 to 5 produces system, also comprise a pulse coupler and a Partial discharge detector, described pulse coupler is serially connected between the ground lead of capacitive apparatus and ground, and Partial discharge detector is connected with pulse coupler.
7. partial discharge detecting system according to claim 6, is characterized in that, the signal frequency range that described pulse coupler can detect is 0 ~ 1MHz.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420560366.XU CN204065180U (en) | 2014-09-26 | 2014-09-26 | A kind of wave of oscillation produces system and partial discharge detecting system |
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| CN201420560366.XU CN204065180U (en) | 2014-09-26 | 2014-09-26 | A kind of wave of oscillation produces system and partial discharge detecting system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237582A (en) * | 2014-09-26 | 2014-12-24 | 国家电网公司 | Oscillatory wave generation system and method and partial discharge detection system and method |
| CN105301465A (en) * | 2015-12-01 | 2016-02-03 | 武汉大学 | Direct current gas insulation electrical equipment partial discharge decomposition simulation experiment apparatus |
| CN107329068A (en) * | 2017-06-30 | 2017-11-07 | 中国西电电气股份有限公司 | Spark gap recover loop and the method for voltage test in a kind of series compensation device |
| CN108594088A (en) * | 2018-04-28 | 2018-09-28 | 广州供电局有限公司 | The detection device and detecting system of reactor |
-
2014
- 2014-09-26 CN CN201420560366.XU patent/CN204065180U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237582A (en) * | 2014-09-26 | 2014-12-24 | 国家电网公司 | Oscillatory wave generation system and method and partial discharge detection system and method |
| CN105301465A (en) * | 2015-12-01 | 2016-02-03 | 武汉大学 | Direct current gas insulation electrical equipment partial discharge decomposition simulation experiment apparatus |
| CN105301465B (en) * | 2015-12-01 | 2018-06-29 | 武汉大学 | A kind of DC gas insulated local discharge of electrical equipment decomposes analogue experiment installation |
| CN107329068A (en) * | 2017-06-30 | 2017-11-07 | 中国西电电气股份有限公司 | Spark gap recover loop and the method for voltage test in a kind of series compensation device |
| CN107329068B (en) * | 2017-06-30 | 2020-06-23 | 中国西电电气股份有限公司 | Circuit and method for performing voltage recovery test on spark gap in series compensation device |
| CN108594088A (en) * | 2018-04-28 | 2018-09-28 | 广州供电局有限公司 | The detection device and detecting system of reactor |
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Granted publication date: 20141231 |