CN104502825A - OWTS power cable oscillation wave test equipment and test method - Google Patents
OWTS power cable oscillation wave test equipment and test method Download PDFInfo
- Publication number
- CN104502825A CN104502825A CN201410723507.XA CN201410723507A CN104502825A CN 104502825 A CN104502825 A CN 104502825A CN 201410723507 A CN201410723507 A CN 201410723507A CN 104502825 A CN104502825 A CN 104502825A
- Authority
- CN
- China
- Prior art keywords
- cable
- power cable
- electronic switch
- voltage
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 48
- 230000010355 oscillation Effects 0.000 title claims abstract description 33
- 238000010998 test method Methods 0.000 title claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims abstract description 40
- 238000009413 insulation Methods 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 238000007600 charging Methods 0.000 claims abstract description 12
- 230000002441 reversible effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 13
- 238000013016 damping Methods 0.000 abstract 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 3
- 229920003020 cross-linked polyethylene Polymers 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses OWTS power cable oscillation wave test equipment and a test method. The OWTS power cable oscillation wave test equipment comprises a DC high-voltage power supply, a capacitor, high-voltage electronic switches, an electric reactor, a backward diode and a partial discharge detection unit. The DC high-voltage power supply charges the capacitor and controls the high-voltage electronic switch to be conducted after charging is completed. A cable is charged by the capacitor via a quite short period of time, and then the other high-voltage electronic switch is controlled to be conducted. A weak damping loop is formed by the electric reactor, the cable and line resistance, and damped oscillation wave is generated. Acquisition and analysis of partial discharge signals of the cable are realized by using the partial discharge detection unit so that the insulation state of the power cable is finally acquired. The equipment is compact in structure and convenient for onsite testing, and range of cable capacity capable of being detected can be 0.05muF-6muF. Besides, the test process has no long time of DC charging on the cable so that cable insulation is not damaged.
Description
Technical field
The present invention relates to power cable insulation state detection technique and application thereof, be specifically related to a kind of power cable wave of oscillation testing equipment and test method.
Background technology
Along with electricity need load maintains sustained and rapid growth, more and more higher to the requirement of power supply reliability, urban distribution network round Realization cable adapts to high reliability and space-saving developing direction.Power cable can be subject to the impact of multiple unfavorable factor after putting into operation, causes cable fault to get more and more.But consider the historical reasons of construction cost and urban development, Urban Underground cable mainly adopts direct-burried and comb to lay, cause the problem that urban distribution network power cable inspection and maintenance workload is large and difficulty is large.Therefore, need the more advanced power cable insulation testing equipment of research and method, increase work efficiency, accurately and timely find the insulation fault that power cable exists.With the time ensureing electric power netting safe running and shorten needed for cable detection, reduce power off time, save enterprise cost.
Power cable detection method mainly contains ac voltage withstanding method, DC break down voltage method and the resistance to platen press of ultralow frequency.Ac voltage withstanding method and actual motion condition the most close, but testing equipment is huge, not easily carries out site test, limits the application of the method.Implement DC voltage withstand test to cable and be actually a kind of destructive test, in lot of examples, XLPE power cable is through DC voltage withstand test test passes, and the example that dielectric breakdown accident occurs very soon after again putting into operation is of common occurrence.Therefore there is the early stage deterioration of acceleration XLPE power cable and greatly shorten the drawbacks such as cable operation life in DC voltage withstand test.Although ultralow frequency method place capacity reduces greatly, because the equivalence of itself and power-frequency voltage is very low, Detection results can not be satisfactory.
The developed country that some cable use amounts are larger proposes oscillating wave voltage test in the preventive trial of XLPE power cable.Oscillating wave voltage test is proposed by Dutch Delft university the earliest, the method cardinal principle is when cable having certain voltage, by the action of electronic switch, form the underdamping loop of cable, inductance and a line resistance, cable produces an attenuation oscillasion impulse, thus the shelf depreciation of cable is monitored, finally the insulation status of cable is evaluated.Current wave of oscillation pick-up unit is roughly divided into two kinds, and one is AC-OWTS, and one is DC-OWTS.AC-OWTS adopts the withstand voltage principle of work of AC frequency conversion series resonance, under peak value synchronizing signal controls, high-voltage switch gear is utilized to make series resonant tank stop power stage when peak value, and simultaneously closed high switch, form wave of oscillation damped oscillation, which control module complex structure, converter plant cost intensive.DC-OWTS uses a DC high-voltage power supply cable to be reached to the charging process of a few minutes, then produces the wave of oscillation.
To sum up, the shortcoming of existing power cable wave of oscillation test is: 1, adopt changing resonant withstand voltage testing device to charge to power cable, power supply capacity needed for equipment is large, heavy, be not easy to transport, causes site test difficulty; 2, adopt DC high-voltage power supply to charge to power cable, the duration of charging is longer, reaches several minutes, and acceleration cable insulation is aging.
Summary of the invention
For prior art Problems existing and deficiency, the object of the present invention is to provide a kind of OWTS power cable wave of oscillation testing equipment and test method.This testing equipment volume is little, is easy to carry, is conducive to site test, and the cable duration of charging is short, can not damage cable insulation.
To achieve these goals, present invention employs following technical scheme:
A kind of OWTS power cable wave of oscillation testing equipment, comprises circuit module for producing the wave of oscillation on tested power cable and the Partial Discharge Detection unit for the insulation status that obtains tested power cable, described circuit module comprises DC high-voltage power supply, capacitor, first high-pressure electronic switch, second high-pressure electronic switch, reactor, backward dioded, first cable termination and the second cable termination, the high-voltage output end of DC high-voltage power supply is connected with one end of one end of capacitor and the first high-pressure electronic switch, the other end of the first high-pressure electronic switch and one end of reactor, one end of second high-pressure electronic switch and the negative electrode of backward dioded are connected, the other end of reactor is connected with the first cable termination, the earth terminal of DC high-voltage power supply, the other end of capacitor, the other end of the second high-pressure electronic switch, anode and second cable termination of backward dioded are connected with common ground end.
The voltage of described DC high-voltage power supply is 10kV ~ 100kV.
The electric capacity of described capacitor is 10 μ F ~ 50 μ F.
The inductance of described reactor is 0.7H ~ 1H.
The test method of above-mentioned OWTS power cable wave of oscillation testing equipment, comprises the following steps:
1) on the heart yearn the first cable termination and the second cable termination being connected on tested power cable respectively and screen layer;
2) through step 1) after, DC high-voltage power supply is utilized to charge to capacitor, charge to when voltage on capacitor reaches predetermined amplitude and control the first high-pressure electronic switch conduction, the tested power cable charging of couple capacitors after first high-pressure electronic switch conduction, charge the first high-pressure electronic switch OFF after instantaneous completing, then the second high-pressure electronic switch conduction is controlled, and use Partial Discharge Detection unit to carry out gather and analysis to the local discharge signal of tested power cable, the final insulation status obtaining tested power cable.
The voltage of described tested power cable after capacitor charging is capacitor through 1.2 ~ 1.8 times of DC high-voltage power supply charged voltage.
In the underdamping loop that reactor, tested power cable and line resistance are formed, produce attenuation oscillasion impulse after described second high-pressure electronic switch conduction, when loop current is reverse, control the second high-pressure electronic switch OFF, electric current is through backward dioded afterflow.
Compared with prior art, beneficial effect of the present invention is embodied in:
1) require little to power supply capacity, do not need variable-frequency power sources and Large Copacity power supply, thus whole weight of equipment is light, compact to design, be convenient to site test;
2) the present invention does not need to carry out long DC charging to power cable, and power cable only bears oscillating wave voltage in process of the test, and process of the test can not cause damage to cable insulation;
3) capacitance range of the measurable cable of the present invention is larger, and the capacitance range of measurable cable reaches 0.05 μ F ~ 6 μ F.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of power cable wave of oscillation testing equipment detection streamer of the present invention;
Fig. 2 is the schematic diagram of power cable wave of oscillation testing equipment of the present invention;
In figure: 1. DC high-voltage power supply, 2. capacitor, 3. the first high-pressure electronic switch, 4. the second high-pressure electronic switch, 5. backward dioded, 6. reactor, 7. tested power cable, 8. the first cable termination, 9. the second cable termination.
Embodiment
Below in conjunction with drawings and Examples, the present invention is elaborated.
See Fig. 1 and Fig. 2, the invention provides a kind of power cable wave of oscillation testing equipment.Described wave of oscillation testing equipment comprises DC high-voltage power supply 1, capacitor 2, first high-pressure electronic switch 3, second high-pressure electronic switch 4, backward dioded 5, reactor 6 and Partial Discharge Detection unit.
As shown in Figure 2, whole testing equipment single-point altogether.The high-voltage output end of DC high-voltage power supply 1 is connected with one end of one end of capacitor 2 and the first high-pressure electronic switch 3, one end of the other end of the first high-pressure electronic switch 3 and one end of the second high-pressure electronic switch 4, the negative electrode of backward dioded 5 and reactor 6 is connected, the other end of reactor 6 is connected with the heart yearn of tested power cable 7 by the first cable termination 8, the equal common ground of all the other terminals of equipment, the second cable termination 9 is connected with the screen layer of tested power cable.
DC high-voltage power supply 1: as vibration zero energy source, first charge to capacitor 2, reach certain amplitude, then control to power cable rapid charge by the first high-pressure electronic switch 3, charging voltage can reach about 1.2 ~ 1.8 times of capacitor charged voltage.
Capacitor 2: as the unit of stored energy, transmission, first through DC high-voltage power supply 1 charge storage energy, then by the first high-pressure electronic switch 3 within very short time (several milliseconds) by Energy transfer on power cable, thus on power cable, produce the voltage of certain amplitude;
First high-pressure electronic switch 3: when voltage on capacitor 2 reaches predetermined amplitude time control conducting, make capacitor 2 through reactor 6 pairs of power cable chargings, then when voltage on power cable reaches peak value, the first high-pressure electronic switch 3 turns off;
Second high-pressure electronic switch 4: when tested power cable reaches the trial voltage value of setting through several milliseconds, the second high-pressure electronic switch 4 conducting immediately, tested power cable discharges through reactor 6, forms the attenuation oscillasion impulse of certain frequency;
Reactor 6: as the perceptual components and parts vibrated with capacitor 2, require enough induction reactance, and for put high quality factor reactor without office, make the centre frequency of vibrating near power frequency, General Requirements oscillation center frequency is between 40Hz ~ 1000Hz;
Backward dioded 5: when tested power cable reaches the trial voltage value of setting, second high-pressure electronic switch 4 conducting immediately, forms the attenuation oscillasion impulse of certain frequency, when whole oscillation circuit electric current is reverse, through backward dioded 5 afterflow, ensure loop persistent oscillation;
Partial Discharge Detection unit: the high-frequency signal discharged by high-frequency coupling unit inspection oscillation circuit, Quick Catch is carried out to the frequency amplitude of electric discharge, thus analyze kind and the order of severity of cable insulation defect, partial discharges fault point location can be realized simultaneously.
Principle of work of the present invention:
First the present invention is charged to capacitor 2 by DC high-voltage power supply 1, after reaching certain amplitude, control the first high-pressure electronic switch 3 conducting, capacitor 2 charged to cable through the very short time, on cable, voltage will arrive peaking in several milliseconds, first high-pressure electronic switch 3 turns off, control the second high-pressure electronic switch 4 to close, reactor 6, cable and line resistance form a weakly damped oscillation loop, cable forms attenuation oscillasion impulse, utilize the gather and analysis of Partial Discharge Detection unit realization to the local discharge signal of cable simultaneously, the insulation status of final acquisition power cable.
Embodiment 1:
When DC high-voltage power supply 1 to charge 10kV to capacitor 2, capacitor 2 capacity elects 10 μ F as, reactor inductance elects 0.7H as, when cable under test electric capacity is 0.05 μ F, on cable, voltage can reach 17.11kV by 0.69ms after the first high-pressure electronic switch 3 is closed, forms the attenuation oscillasion impulse of 851.5Hz after the second high-pressure electronic switch 4 is closed on cable.
Embodiment 2:
When DC high-voltage power supply 1 to charge 10kV to capacitor 2, capacitor 2 capacity elects 20 μ F as, reactor inductance elects 0.8H as, when cable under test electric capacity is 2 μ F, on cable, voltage can reach 16.88kV by 0.68ms after the first high-pressure electronic switch 3 is closed, forms the attenuation oscillasion impulse of 134.5Hz after the second high-pressure electronic switch 4 is closed on cable.
Embodiment 3:
When DC high-voltage power supply 1 to charge 20kV to capacitor 2, capacitor 2 capacity elects 20 μ F as, reactor inductance elects 1H as, when cable under test electric capacity is 4 μ F, on cable, voltage can reach 32.7kV by 5.9ms after the first high-pressure electronic switch 3 is closed, forms the attenuation oscillasion impulse of 79.5Hz after the second high-pressure electronic switch 4 is closed on cable.
Embodiment 4:
When DC high-voltage power supply 1 to charge 35kV to capacitor 2, capacitor 2 capacity elects 50 μ F as, reactor inductance elects 1H as, when cable under test electric capacity is 6 μ F, on cable, voltage can reach 60.83kV by 7.37ms after the first high-pressure electronic switch 3 is closed, forms the attenuation oscillasion impulse of 66.5Hz after the second high-pressure electronic switch 4 is closed on cable.
The present invention does not directly charge to cable, requires little, do not need variable-frequency power sources and Large Copacity power supply to power supply capacity, thus whole weight of equipment is light, compact to design, is convenient to site test;
The present invention does not need to carry out long DC charging to power cable, and power cable only bears oscillating wave voltage in process of the test, and process of the test can not cause damage to cable insulation;
The present invention is by choosing reactor parameter, and the measurable cable capacity scope of this testing equipment is larger, can reach 0.05 ~ 6 μ F, and produce the wave of oscillation at 40Hz ~ 1000Hz;
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention.
Claims (7)
1. an OWTS power cable wave of oscillation testing equipment, is characterized in that: comprise circuit module for producing the wave of oscillation on tested power cable and the Partial Discharge Detection unit for the insulation status that obtains tested power cable, described circuit module comprises DC high-voltage power supply (1), capacitor (2), first high-pressure electronic switch (3), second high-pressure electronic switch (4), reactor (6), backward dioded (5), first cable termination (8) and the second cable termination (9), the high-voltage output end of DC high-voltage power supply (1) is connected with one end of one end of capacitor (2) and the first high-pressure electronic switch (3), the other end of the first high-pressure electronic switch (3) and one end of reactor (6), one end of second high-pressure electronic switch (4) and the negative electrode of backward dioded (5) are connected, the other end of reactor (6) is connected with the first cable termination (8), the earth terminal of DC high-voltage power supply (1), the other end of capacitor (2), the other end of the second high-pressure electronic switch (4), anode and second cable termination (9) of backward dioded (5) are connected with common ground end.
2. a kind of OWTS power cable wave of oscillation testing equipment according to claim 1, is characterized in that: the voltage of described DC high-voltage power supply (1) is 10kV ~ 100kV.
3. a kind of OWTS power cable wave of oscillation testing equipment according to claim 1, is characterized in that: the electric capacity of described capacitor (2) is 10 μ F ~ 50 μ F.
4. a kind of OWTS power cable wave of oscillation testing equipment according to claim 1, is characterized in that: the inductance of described reactor (6) is 0.7H ~ 1H.
5. a test method for OWTS power cable wave of oscillation testing equipment as claimed in claim 1, is characterized in that: comprise the following steps:
1) on the heart yearn the first cable termination (8) and the second cable termination (9) being connected on tested power cable (7) respectively and screen layer;
2) through step 1) after, DC high-voltage power supply (1) is utilized to charge to capacitor (2), charge to when the upper voltage of capacitor (2) reaches predetermined amplitude and control the first high-pressure electronic switch (3) conducting, after first high-pressure electronic switch (3) conducting, capacitor (2) charges to tested power cable (7), the the first high-pressure electronic switch (3) after instantaneous completing that charges turns off, then the second high-pressure electronic switch (4) conducting is controlled, and use the local discharge signal of Partial Discharge Detection unit to tested power cable (7) to carry out gather and analysis, the insulation status of the tested power cable of final acquisition.
6. the test method of a kind of OWTS power cable wave of oscillation testing equipment according to claim 5, is characterized in that: the voltage of described tested power cable after capacitor charging is capacitor through 1.2 ~ 1.8 times of DC high-voltage power supply charged voltage.
7. the test method of a kind of OWTS power cable wave of oscillation testing equipment according to claim 5, it is characterized in that: after described second high-pressure electronic switch (4) conducting, in the underdamping loop that reactor (6), tested power cable (7) and line resistance are formed, produce attenuation oscillasion impulse, when loop current is reverse, control the second high-pressure electronic switch (4) to turn off, electric current is through backward dioded (5) afterflow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410723507.XA CN104502825B (en) | 2014-12-02 | 2014-12-02 | OWTS power cable wave of oscillation testing equipments and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410723507.XA CN104502825B (en) | 2014-12-02 | 2014-12-02 | OWTS power cable wave of oscillation testing equipments and test method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104502825A true CN104502825A (en) | 2015-04-08 |
| CN104502825B CN104502825B (en) | 2017-08-01 |
Family
ID=52944236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410723507.XA Active CN104502825B (en) | 2014-12-02 | 2014-12-02 | OWTS power cable wave of oscillation testing equipments and test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104502825B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105182193A (en) * | 2015-08-24 | 2015-12-23 | 国网天津市电力公司 | owts testing method for short-time power failure of distribution power cable |
| CN105425086A (en) * | 2016-01-16 | 2016-03-23 | 哈尔滨工业大学 | Cathode independent service life test outer loop simulating coupling discharging current oscillation of cathode and electrical thruster |
| CN105548849A (en) * | 2016-02-19 | 2016-05-04 | 西安交通大学 | Local discharge testing circuit and method for high-voltage direct current cable |
| CN105629108A (en) * | 2015-12-30 | 2016-06-01 | 哈尔滨工业大学 | Independent cathode experiment circuit for simulating coupling work of cathode and thruster |
| CN105891690A (en) * | 2016-04-25 | 2016-08-24 | 广东电网有限责任公司佛山供电局 | Signal generating device |
| CN106501685A (en) * | 2016-09-20 | 2017-03-15 | 国网天津市电力公司 | For 35kV and following direct current cables insulation wave of oscillation experimental rig and its method |
| CN107576897A (en) * | 2017-08-30 | 2018-01-12 | 广西电网有限责任公司电力科学研究院 | A kind of high-voltage cable insulating burn in test circuit and its method of testing |
| CN110531235A (en) * | 2019-10-16 | 2019-12-03 | 四川大学 | Serial connection charge formula vibrates wave circuit, cable local discharge test device and method |
| CN110824346A (en) * | 2019-11-14 | 2020-02-21 | 国网辽宁省电力有限公司电力科学研究院 | Power distribution network circuit breaker series resonance voltage withstand device for power supply of electric automobile |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110086392A (en) * | 2010-01-22 | 2011-07-28 | 한국공항공사 | System for eliminating the disability of electric facilities in airport |
| CN102749558A (en) * | 2012-06-20 | 2012-10-24 | 西安博源电气有限公司 | Device and method for detecting cable oscillatory wave partial discharge and fault location |
| CN102928756A (en) * | 2012-11-19 | 2013-02-13 | 广州供电局有限公司 | Oscillatory-wave-based simulation system for detecting and positioning partial discharge of cable |
| CN103513158A (en) * | 2013-09-18 | 2014-01-15 | 西安交通大学 | Damped oscillatory wave lower cable local discharge detection device and method |
| CN203658523U (en) * | 2013-12-18 | 2014-06-18 | 上海思瑞在线监测技术有限公司 | Cable insulation detection equipment based on oscillating wave test |
| CN203950010U (en) * | 2014-02-20 | 2014-11-19 | 广州供电局有限公司 | Cable local discharge detection device |
-
2014
- 2014-12-02 CN CN201410723507.XA patent/CN104502825B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110086392A (en) * | 2010-01-22 | 2011-07-28 | 한국공항공사 | System for eliminating the disability of electric facilities in airport |
| CN102749558A (en) * | 2012-06-20 | 2012-10-24 | 西安博源电气有限公司 | Device and method for detecting cable oscillatory wave partial discharge and fault location |
| CN102928756A (en) * | 2012-11-19 | 2013-02-13 | 广州供电局有限公司 | Oscillatory-wave-based simulation system for detecting and positioning partial discharge of cable |
| CN103513158A (en) * | 2013-09-18 | 2014-01-15 | 西安交通大学 | Damped oscillatory wave lower cable local discharge detection device and method |
| CN203658523U (en) * | 2013-12-18 | 2014-06-18 | 上海思瑞在线监测技术有限公司 | Cable insulation detection equipment based on oscillating wave test |
| CN203950010U (en) * | 2014-02-20 | 2014-11-19 | 广州供电局有限公司 | Cable local discharge detection device |
Non-Patent Citations (1)
| Title |
|---|
| 陶诗洋: "基于振荡波测试系统的XLPE电缆局部放电检测技术", 《中国电力》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105182193A (en) * | 2015-08-24 | 2015-12-23 | 国网天津市电力公司 | owts testing method for short-time power failure of distribution power cable |
| CN105629108A (en) * | 2015-12-30 | 2016-06-01 | 哈尔滨工业大学 | Independent cathode experiment circuit for simulating coupling work of cathode and thruster |
| CN105629108B (en) * | 2015-12-30 | 2018-03-30 | 哈尔滨工业大学 | Simulate the hollow cathode independent experiment circuit of hollow cathode and thruster coupling operational |
| CN105425086A (en) * | 2016-01-16 | 2016-03-23 | 哈尔滨工业大学 | Cathode independent service life test outer loop simulating coupling discharging current oscillation of cathode and electrical thruster |
| CN105425086B (en) * | 2016-01-16 | 2018-03-16 | 哈尔滨工业大学 | Simulate the negative electrode independence life test external loop of negative electrode and electric thruster coupled discharge current oscillation |
| CN105548849A (en) * | 2016-02-19 | 2016-05-04 | 西安交通大学 | Local discharge testing circuit and method for high-voltage direct current cable |
| CN105891690A (en) * | 2016-04-25 | 2016-08-24 | 广东电网有限责任公司佛山供电局 | Signal generating device |
| CN106501685A (en) * | 2016-09-20 | 2017-03-15 | 国网天津市电力公司 | For 35kV and following direct current cables insulation wave of oscillation experimental rig and its method |
| CN107576897A (en) * | 2017-08-30 | 2018-01-12 | 广西电网有限责任公司电力科学研究院 | A kind of high-voltage cable insulating burn in test circuit and its method of testing |
| CN110531235A (en) * | 2019-10-16 | 2019-12-03 | 四川大学 | Serial connection charge formula vibrates wave circuit, cable local discharge test device and method |
| CN110824346A (en) * | 2019-11-14 | 2020-02-21 | 国网辽宁省电力有限公司电力科学研究院 | Power distribution network circuit breaker series resonance voltage withstand device for power supply of electric automobile |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104502825B (en) | 2017-08-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104502825A (en) | OWTS power cable oscillation wave test equipment and test method | |
| CN103969527B (en) | A kind of discharge and recharge life detecting device of high voltage ceramic capacitor | |
| CN202770953U (en) | Partial discharge detector for oscillating wave of crosslinked cable | |
| CN111880064A (en) | Cable voltage-withstanding partial discharge synchronous detection device | |
| CN201965195U (en) | Turn-to-turn insulation detection device for light dry reactor | |
| CN203658523U (en) | Cable insulation detection equipment based on oscillating wave test | |
| CN102435800A (en) | High-voltage pulse generator | |
| CN109901034B (en) | Power cable partial discharge detection device and evaluation method based on multi-stage power supply and series resonance | |
| CN102645594B (en) | For detecting test unit and the control method of resistance of high-voltage direct-current transmission converter | |
| CN110618356B (en) | Device and method for long-time voltage tolerance test of direct-current transfer switch lightning arrester | |
| CN103675624A (en) | Power-frequency voltage testing device and testing method of lightning arrester | |
| CN103607056A (en) | Compensation devices in magnetic induction type wireless electric energy transmission equipment, and compensation methods thereof | |
| CN103852697A (en) | Cable partial discharge detection device | |
| CN109342910A (en) | A kind of complete electric type local discharge detection device and detection method | |
| CN202159114U (en) | Series connection frequency conversion automatic resonance test device | |
| CN104901326A (en) | Control rod drive mechanism static power supply system and energy storage system and power supply method thereof | |
| CN103746467B (en) | Based on induction energy fetching device and its implementation of field coupled | |
| CN103543305B (en) | Weak damping alternating-current high-voltage generator for partial discharge detection of power equipment | |
| CN103063987B (en) | Test method of dry type smoothing reactor end-to-end medium-frequency oscillator capacitor discharge | |
| CN105223484A (en) | A kind of dry reactor higher-order of oscillation impulse voltage endurance test method and system thereof | |
| CN106501685A (en) | For 35kV and following direct current cables insulation wave of oscillation experimental rig and its method | |
| CN103063992B (en) | Oscillatory wave system | |
| CN203894373U (en) | Insulation aging judgment system based on inductive coil | |
| CN107015130B (en) | A kind of Combined cable insulation performance testing device | |
| CN202305608U (en) | High voltage pulse generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20241002 Address after: Room 1029, 1st Floor, Hongde Building, No. 20 West Science and Technology Innovation Port, Fengxi New City, Xixian New Area, Xi'an City, Shaanxi Province, 712000 Patentee after: Xixian New Area metneng automation equipment Co.,Ltd. Country or region after: China Address before: Beilin District Xianning West Road 710049, Shaanxi city of Xi'an province No. 28 Patentee before: XI'AN JIAOTONG University Country or region before: China |
|
| TR01 | Transfer of patent right |