CN104635066A - Intelligent insulation parameter test residual charge detecting and discharging protection method - Google Patents
Intelligent insulation parameter test residual charge detecting and discharging protection method Download PDFInfo
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- CN104635066A CN104635066A CN201510103939.5A CN201510103939A CN104635066A CN 104635066 A CN104635066 A CN 104635066A CN 201510103939 A CN201510103939 A CN 201510103939A CN 104635066 A CN104635066 A CN 104635066A
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Abstract
The invention discloses an intelligent insulation parameter test residual charge detecting and discharging protection method. According to the method, a detection control unit (1), a voltage detection unit V, controllable switches k1, k2, k3 and K4 and a discharging resistor R, when capacitive equipment is subjected to insulation parameter test, firstly, whether residual charges exist on equipment to be tested or not is detected by installed detection programs, if so, discharging processing is carried out, test programs are started until the residual charges on the equipment to be tested are zero, and insulation parameters such as absorption ratios, polarization indexes and insulation resistors are rested. After the test completion, self discharging and residual charge detecting programs of a device are started, the charges, charged during the test, of the capacitive equipment to be tested are subjected to discharging processing, the discharging is firstly carried out through the resistor, then, the discharging is carried out through direct grounding short circuit, and after the test completion, whether the residual charges exist on the capacitive equipment to be tested or not is reported by a method of residual charge detection sound-light alarm of the device.
Description
Technical field
The present invention relates to high-voltage test field, be specifically related to detection and the discharge prevention method of residual charge before and after the Insulation Test of capacitive tested device.
Background technology
Apply DC voltage on the composite insulator of electrical equipment after, wherein just there are three kinds of electric currents to produce, comprise conduction current, capacitance current and Absorption Current.When tested device being applied to DC voltage in insulation, the change of its current i is as shown in current curve in Fig. 2, and it is very large to start electric current, reduces gradually later, finally levels off to a constant Ig.The speed of this process, relevant with the electric capacity of insulated article, electric capacity is larger, and the time continued is longer, even reaches several minutes or the longer time.Area in Fig. 2 between curve i and stable state conduction current Ig is insulator charge Q a from power supply " absorption " in charging process, and the phenomenon of this " absorption " gradually electric charge is just called " absorbing phenomenon ".
From figure
2curve can be found out, in insulation resistance test, survey insulation resistance with Measuring Time change and change, only have as t=∞, its measured value is R=R ∞, but in insulation resistance test, when particularly electric capacity is larger, be difficult to the value measuring R ∞, therefore, in actual tests, regulations stipulate, only need measure insulating resistance value during 60s, i.e. the value of R60S; When electric capacity is large especially, absorbing phenomenon is obvious especially, as high-rating generator, can adopt insulating resistance value during 10min.So insulation parameter test has insulation resistance test, absorption ratio test and polarization index to test, it is defined as:
Absorptance, K1=R60s/R15s
In formula, R60s is that t=60s records insulating resistance value, the insulating resistance value recorded when R15s is t=15s.
Polarization index, K2=R10min/R1min
The insulating resistance value recorded when R10min is t=10min in formula, the insulating resistance value recorded when R1min is t=1min.
If but capacitive tested device tested device before doing insulation parameter experiment exists with residual charge, absorptance and test findings will be affected, the test apparatus of current employing mainly contains manual megohmmeter and electronic type megohmmeter, all do not detect tested device before the test and whether there is residual charge, the absorptance recorded like this and polarization index are inaccurate.
Tested capacitive apparatus, after Insulation Test, can be filled higher DC voltage with at the trial, is injected into more residual charge and makes DC voltage higher on tested capacitive electrical equipment band in the insulating medium of equipment in the equivalent capacity of equipment.Traditional manual megohmmeter can not stop " live wire " of first open test wiring in Shi Yan Jie Bouquet defensive position, and then test specimen is discharged, charging method carries out ground connection electric discharge by discharging rod, first by the conductive discharge of discharging rod, and then directly ground connection electric discharge.But some people follows the line of least resistance and adopts the electric discharge of direct ground connection, be equivalent to like this do tested device cut ripple test, the turn-to-turn of tested device and layer insulation can be caused to damage.Some equipment, due to insulation system, once bring residual charge to be difficult to drain at short notice, after tested capacitive electrical equipment band residual charge puts into operation, can produce electric field distortion by residual charge, be directed at examination equipment operationally punch through damage.
Summary of the invention
For above problem, the residual charge having invented a kind of Intelligent insulating parameter experiment detects and discharge prevention method, this method is applicable to Intelligent insulating parameter tester, and a kind of residual charge of Intelligent insulating parameter experiment detects and discharge prevention method, by detection control unit (1); Voltage detection unit V; Gate-controlled switch k
1, k
2, k
3, K
4form with discharge resistance R, when insulation parameter test is carried out to capacitive apparatus, first detected on tested device by the trace routine of dress administration and exist with or without residual charge, if any, then carry out discharge process, until residual charge is after zero on tested device, just starting characteristics test program, tests insulation parameters such as absorptance, polarization index and insulation resistances.After Shi Yan Jie Bouquet, the self discharge of starter gear and residual charge trace routine, discharge process is carried out to the electric charge that tested capacitive apparatus is filled with at the trial, first through conductive discharge, directly ground short circuit electric discharge again, the method being detected sound and light alarm by the residual charge of device is reported, report display residual charge is zero, Shi Yan Jie Bouquet.
The present invention has following advantage:
1, before insulation parameter test, first detect on tested device and exist with or without residual charge, and the test accuracy of absorptance, polarization index can be guaranteed by the residual charge that discharge process drains on tested device.
2, after insulation parameter test, the discharge examination control program of device first through protective resistance more directly ground short circuit electric discharge charging method can guarantee that tested device does not produce and cut a ripple and be conducive to device security.
3, after insulation parameter test, the residual charge detection alarm method of device can guarantee that tested device does not have residual charge after experiment, can guarantee the personal safety of finishing operations and tested device put into operation after safety.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of Intelligent insulating parameter tester, the detection control unit that in figure, (1) is tester; k
1, k
2, k
3, k
4for gate-controlled switch, the detection control unit (1) of tested person instrument controls, and switch fracture and insulation against ground meet does not affect Insulation Test result when the highest trial voltage exports; R is discharge resistance, and the discharge current that its resistance meets when the highest trial voltage is no more than instrument limit value I
r; V is voltage detection unit.
Fig. 2 is that electrical equipment is applied with the absorption curve after high direct voltage and insulation resistance change curve.
Embodiment
When use insulation parameter tester is for before detecting capacitive test specimen, when use insulation parameter tester is for before detecting capacitive test specimen, k
1, k
4be in off-state, k
2, K
3closed, detect tested device C by voltage detection unit
xon residual voltage, discharge process is carried out to the residual charge of equipment under test, as test tested device C
xon residual voltage be after zero, disconnect k
2, k
3and K
4, close k
1start to test the insulation parameter of tested device, after having tested, first disconnect k
1, close k
2, and k
3, equipment under test is discharged, k after elapsed time T by resistance R
4closed, make the direct ground connection electric discharge of equipment under test, after Shi Yan Jie Bouquet, whether tested capacitive apparatus has residual charge to exist, the method being detected sound and light alarm by the residual charge of device is reported, until voltage detection unit V tests tested device C
xon residual voltage terminate when being zero.
K after Shi Yan Jie Bouquet
4closure time T is the time of tested device voltage attenuation to the half of insulation parameter tester output voltage.
After Shi Yan Jie Bouquet, whether tested capacitive apparatus there is residual charge to exist, detect sound flash alarm system method by the residual charge of device to report, warn Jie Bouquet when residual charge is zero, can test connection be removed, guarantee the personal safety of finishing operations and tested device put into operation after safety.
The above is only the preferred embodiment of the present invention, protection scope of the present invention be not only confined to above-described embodiment, and all technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (3)
1. the residual charge of Intelligent insulating parameter experiment detects and a discharge prevention method, by detection control unit (1), voltage detection unit V, and gate-controlled switch k
1, k
2, k
3, K
4form with discharge resistance R, it is characterized in that: before use insulation parameter tester detects capacitive tested device, k
1, k
4be in off-state, k
2, K
3closed, detect tested device C by voltage detection unit
xon residual voltage, discharge process is carried out to the residual charge of equipment under test, as test tested device C
xon residual charge be after zero, disconnect k
2, k
3and K
4, the k1 that closes starts to test the insulation parameter of tested device, after having tested, first disconnects k
1, close k
2, and k
3, equipment under test is discharged, k after elapsed time T by resistance R
4closed, make the direct ground connection electric discharge of equipment under test, after Shi Yan Jie Bouquet, whether tested capacitive apparatus has residual charge to exist, detect by the residual charge of device and report with the method for sound and light alarm.
2. the residual charge of a kind of Intelligent insulating parameter experiment according to claim 1 detects and discharge prevention method, it is characterized in that: detection control unit (1) is Intelligent insulating parameter tester main body, the measuring-signal of voltage detection unit V sends into detection control unit (1); Switch k
1, k
2, k
3and k
4control by detection control unit (1); k
1, k
2, k
3and k
4switch fracture and insulation against ground meet does not affect Insulation Test result when the highest trial voltage exports; R is discharge resistance, and the discharge current that its resistance meets when the highest trial voltage is no more than instrument limit value I
r.
3. the residual charge of a kind of Intelligent insulating parameter experiment according to claim 1 detects and discharge prevention method, it is characterized in that: k after Shi Yan Jie Bouquet
4closure time T is the time of tested device voltage attenuation to the half of insulation parameter tester output voltage, and residual charge detects off-test when sound and light alarm is removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510103939.5A CN104635066A (en) | 2015-03-10 | 2015-03-10 | Intelligent insulation parameter test residual charge detecting and discharging protection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510103939.5A CN104635066A (en) | 2015-03-10 | 2015-03-10 | Intelligent insulation parameter test residual charge detecting and discharging protection method |
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| Publication Number | Publication Date |
|---|---|
| CN104635066A true CN104635066A (en) | 2015-05-20 |
Family
ID=53214035
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510103939.5A Pending CN104635066A (en) | 2015-03-10 | 2015-03-10 | Intelligent insulation parameter test residual charge detecting and discharging protection method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105182201A (en) * | 2015-09-28 | 2015-12-23 | 广东电网有限责任公司电力科学研究院 | Generator stator bar insulation state evaluation method based on low voltage and multiple parameters |
| CN107144787A (en) * | 2017-04-24 | 2017-09-08 | 华北电力大学 | The generator insulating detection means and detection method of a kind of permanent-magnetic wind driven generator |
| CN110678136A (en) * | 2017-05-19 | 2020-01-10 | 阿莱西外科有限公司 | Surgical assembly and system and DC voltage compensation circuit |
| CN119001370A (en) * | 2024-10-18 | 2024-11-22 | 国网河南省电力公司新乡供电公司 | Intelligent insulation testing device for high-voltage cable connector |
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| CN2812021Y (en) * | 2005-07-22 | 2006-08-30 | 上海希瑞电子设备有限公司 | Capacitor measurer |
| EP1806591A2 (en) * | 2005-09-01 | 2007-07-11 | Hubbell Incorporated | High-voltage power supply control system and wireless controller and method therefor |
| CN103245838A (en) * | 2013-04-27 | 2013-08-14 | 国家电网公司 | A cable insulation testing system |
| CN203301050U (en) * | 2013-06-18 | 2013-11-20 | 广东立胜电力工程有限公司 | Novel, safe and reliable high-voltage discharge bar |
| EP2684067A1 (en) * | 2011-03-09 | 2014-01-15 | Yazaki Corporation | Insulated condition detector with fault detection and location |
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2015
- 2015-03-10 CN CN201510103939.5A patent/CN104635066A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2812021Y (en) * | 2005-07-22 | 2006-08-30 | 上海希瑞电子设备有限公司 | Capacitor measurer |
| EP1806591A2 (en) * | 2005-09-01 | 2007-07-11 | Hubbell Incorporated | High-voltage power supply control system and wireless controller and method therefor |
| EP2684067A1 (en) * | 2011-03-09 | 2014-01-15 | Yazaki Corporation | Insulated condition detector with fault detection and location |
| CN103245838A (en) * | 2013-04-27 | 2013-08-14 | 国家电网公司 | A cable insulation testing system |
| CN203301050U (en) * | 2013-06-18 | 2013-11-20 | 广东立胜电力工程有限公司 | Novel, safe and reliable high-voltage discharge bar |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105182201A (en) * | 2015-09-28 | 2015-12-23 | 广东电网有限责任公司电力科学研究院 | Generator stator bar insulation state evaluation method based on low voltage and multiple parameters |
| CN105182201B (en) * | 2015-09-28 | 2017-11-10 | 广东电网有限责任公司电力科学研究院 | Generator stator bar state of insulation assessment method based on low-voltage and multi-parameter |
| CN107144787A (en) * | 2017-04-24 | 2017-09-08 | 华北电力大学 | The generator insulating detection means and detection method of a kind of permanent-magnetic wind driven generator |
| CN110678136A (en) * | 2017-05-19 | 2020-01-10 | 阿莱西外科有限公司 | Surgical assembly and system and DC voltage compensation circuit |
| CN110678136B (en) * | 2017-05-19 | 2024-02-27 | 阿莱西外科有限公司 | Surgical assembly and system and DC voltage compensation circuit |
| CN119001370A (en) * | 2024-10-18 | 2024-11-22 | 国网河南省电力公司新乡供电公司 | Intelligent insulation testing device for high-voltage cable connector |
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Application publication date: 20150520 |