CN203894373U - Insulation aging judgment system based on inductive coil - Google Patents
Insulation aging judgment system based on inductive coil Download PDFInfo
- Publication number
- CN203894373U CN203894373U CN201420340928.XU CN201420340928U CN203894373U CN 203894373 U CN203894373 U CN 203894373U CN 201420340928 U CN201420340928 U CN 201420340928U CN 203894373 U CN203894373 U CN 203894373U
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- inductive coil
- pressure electronic
- insulation
- wiring
- power supply
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- 230000001939 inductive effect Effects 0.000 title claims abstract description 48
- 238000009413 insulation Methods 0.000 title claims abstract description 30
- 230000032683 aging Effects 0.000 title abstract 4
- 238000012360 testing method Methods 0.000 claims abstract description 37
- 239000003990 capacitor Substances 0.000 claims abstract description 27
- 238000004891 communication Methods 0.000 claims abstract description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 13
- 239000010703 silicon Substances 0.000 claims description 13
- 238000002847 impedance measurement Methods 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 238000004146 energy storage Methods 0.000 abstract description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 10
- 238000001514 detection method Methods 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 4
- 238000010304 firing Methods 0.000 description 3
- 239000013307 optical fiber Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
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- Testing Relating To Insulation (AREA)
Abstract
The utility model provides an insulation aging judgment system based on an inductive coil. The insulation aging judgment comprises a remote control cabinet, a power supply, a charging resistor, an energy storage capacitor, a high voltage electronic switch device, a test voltage divider and a partial discharge test impedance device. The power supply, the charging resistor, the energy storage capacitor and an inductive coil device to be measured are connected in series to form a closed loop. A series branch formed by the test voltage divider and the partial discharge test impedance device is parallelly connected with the inductive coil device to be measured. The high voltage electronic switch device is parallelly connected to a series branch formed by the energy storage capacitor and the inductive coil device to be measured. The remote control cabinet is connected to the power supply through main loop wiring and is connected to the high voltage electronic switch device through a communication wiring. The remote control cabinet is connected to an oscilloscope through testing wiring. Both the test voltage divider and the partial discharge test impedance device are connected to the oscilloscope through the communication wiring. According to the insulation aging judgment system, starting voltage is effectively reduced to ensure that the insulation of the inductive coil is not damaged.
Description
Technical field
The utility model relates to a kind of insulation ag(e)ing judgement system based on inductive coil.
Background technology
Series connection air reactor in electric system and the insulation defect of shunt reactor detect, the turn-to-turn insulation state of reactor is all to monitor during whole service, repeatedly there is ignition in quality (operation risk the is high) electrical network that its reliability of operation depends primarily on product itself, especially in unattended transformer station, consequence is more serious.Especially also the reactor year existence under running status arrives the more than ten years for several years, and wherein part exists large potential safety hazard.
Existing detection means is to adopt DC to boost to capacitor C charging, and then Closing Switch, makes to produce LC damped oscillation between capacitor C and reactor LX, recording oscillation frequency is f1, for single vibration, calculate attenuation rate delt 1, as the Y (t) of transport function simultaneously;
Then periodically disconnect Closing Switch, make damped oscillation continue to occur, rising DC voltage, the frequency that obtains damped oscillation is f2, calculates attenuation rate delt 2, as the X (t) of transport function;
By relatively f1 and f2, relatively attenuation rate delt1 and delt2, and W (t)=Y (t)/X (t) system transter, can differentiate the insulation defect of test product;
But adopt prior art (test of dry reactor superpotential): resonant capacitance is after 3000pF continuous discharge, to draw following table 1:
Table 1
Contrast two testing programs and the reactor having put into operation 8 years can be detected and have insulation hidden danger, but prior art can effectively identify while needing firing potential to be increased to direct current 50kV and 55KV, could effectively detect reactor have Insulation Problems.
Although this testing program and detection mode (test of turn-to-turn superpotential), adopt direct current to capacitor charging, by ball gap, air reactor sparked, and forms attenuation oscillasion impulse, judges whether defectiveness by frequency; But Shortcomings: because ball-gap discharge is subject to the impact of weather and humidity, each sparking voltage is inconsistent; Adopt power frequency voltage multiplying rectifier to capacitor charging, bulky, be unfavorable for site test; When testing program is tested reactor, along with voltage raises, can cause reactor because test causes insulation damages.
Summary of the invention
The purpose of this utility model is to overcome the deficiency that prior art exists, and a kind of insulation ag(e)ing judgement system based on inductive coil is provided, and effectively reduces starting potential and guarantees that the insulation of inductive coil is not damaged.
The purpose of this utility model is achieved through the following technical solutions:
Insulation ag(e)ing judgement system based on inductive coil, comprise Long-distance Control cabinet, power supply, charging resistor, storage capacitor, high-pressure electronic switchgear, Impedance measurement device is put in the drawn game of test voltage divider, described power supply, charging resistor, storage capacitor and inductive coil device to be measured are composed in series closed-loop path, it is in parallel with inductive coil device to be measured that the series arm that Impedance measurement device forms is put in the drawn game of described test voltage divider, described high-pressure electronic switchgear is parallel to the series arm of storage capacitor and inductive coil installation composition to be measured, described Long-distance Control cabinet is connected with power supply by major loop wiring, described Long-distance Control cabinet is also connected with high-pressure electronic switchgear with crossing communication wiring, described Long-distance Control cabinet is connected with oscillograph by test wiring, the drawn game of described test voltage divider is put Impedance measurement device and all by communication wiring, is connected with oscillograph.
Further, the described insulation ag(e)ing judgement system based on inductive coil, described power supply is the high voltage direct current generator that intermediate frequency multiplication of voltage mode is exported, its output adjustable extent is at 0 ~ 60KV.
Further, the described insulation ag(e)ing judgement system based on inductive coil, described high-pressure electronic switchgear is comprised of the high-pressure electronic switch stack of some layers of series connection, wherein, high-pressure electronic switch is comprised of controllable silicon, fly-wheel diode, equalizing resistance, described controllable silicon, fly-wheel diode, equalizing resistance are in parallel, controllable silicon and fly-wheel diode Opposite direction connection.
Again further, the described insulation ag(e)ing judgement system based on inductive coil, separates by metal partion (metp) between described high-pressure electronic switch and high-pressure electronic switch.
Again further, the described insulation ag(e)ing judgement system based on inductive coil, described communication wiring is light wiring.
The substantive distinguishing features of technical solutions of the utility model and progressive being mainly reflected in:
The utility model utilizes high-pressure electronic switchgear to complete switching on and off of test loop, to produce inductive coil, carry out pulse oscillating voltage, high-pressure electronic switchgear has accurately controlled, have to utilize and improve controlled range, by high-pressure electronic switchgear to storage capacitor, discharge and recharge to realize discharging and recharging inductive coil device to be measured, whether adopt the drawn game of test voltage divider to put Impedance measurement device carries out detection office to inductive coil device to be measured and high-volume differentiates inductive coil device to be measured and damage simultaneously, by this device, can effectively reduce starting potential and guarantee that the insulation of inductive coil is not damaged.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, technical solutions of the utility model are described further:
Fig. 1: electrical block diagram of the present utility model;
Fig. 2: high-pressure electronic on-off principle structural circuit figure.
Embodiment
As shown in Figure 1, insulation ag(e)ing judgement system based on inductive coil of the present utility model, comprise Long-distance Control cabinet 1, power supply 3, charging resistor 4, storage capacitor 5, high-pressure electronic switchgear 9, Impedance measurement device 8 is put in 7 drawn games of test voltage divider, power supply 3, charging resistor 4, storage capacitor 5 and inductive coil device 6 to be measured are composed in series closed-loop path, it is in parallel with inductive coil device 6 to be measured that the series arm that Impedance measurement device 8 forms is put in test voltage divider 7 drawn games, high-pressure electronic switchgear 9 is parallel to the series arm of storage capacitor 5 and inductive coil device to be measured 6 compositions, Long-distance Control cabinet 1 is connected with power supply 3 by major loop wiring, Long-distance Control cabinet 1 is also connected with high-pressure electronic switchgear 9 with crossing communication wiring, Long-distance Control cabinet 1 is connected with oscillograph 2 by test wiring, 7 drawn games of test voltage divider are put Impedance measurement device 8 and all by communication wiring, are connected with oscillograph 2.
In high-pressure electronic switchgear 9, there is a high-pressure electronic switch (not shown), high-pressure electronic switch is connected with high-pressure electronic switchgear 9, and high-pressure electronic switch is controlled the break-make of high-pressure electronic switchgear 9, when high-pressure electronic switch disconnects, the voltage of power supply 3 directly charges to storage capacitor 5 by charging resistor 4, after high-pressure electronic switch closure, the full 5 pairs of inductive coil devices 6 to be measured of storage capacitor of energy storage discharge, by 7 drawn games of test voltage divider, put 8 pairs of inductive coil devices 6 to be measured of Impedance measurement device and detect, and shown by oscillograph 2.
As shown in Figure 2, high-pressure electronic switchgear 9 is comprised of the high-pressure electronic switch stack of some layers of series connection, and wherein, high-pressure electronic switch is comprised of controllable silicon, fly-wheel diode, equalizing resistance, institute's controllable silicon, fly-wheel diode, equalizing resistance are in parallel, controllable silicon and fly-wheel diode Opposite direction connection.
Wherein, the parameter of controllable silicon and fly-wheel diode is chosen as follows:
Silicon controlled alternative condition: gate drive current I
gTlittle, gate trigger voltage V
gT, peak on state voltage V
tM; And relative error is less than 5%, such as drive current I
gTduring for 105mA, guarantee that the drive current of every grade of controllable silicon 1 is in 100 ~ 110mA, it is best selecting same batch as far as possible.The alternative condition of fly-wheel diode: peak forward drop, the parameters such as Peak Repetitive Reverse Current are basically identical; Height because of attention controllable silicon and fly-wheel diode in installation process is consistent.
Communication wiring is light wiring, wherein, and the choosing of optical fiber: require (wavelength) to choose optical fiber according to the sensitometric curve of power valve and receiving tube, and the length of optical fiber is consistent, then during whole debugging, the gate leve of every grade drives time delay relative error to be less than 100nS; Guarantee the consistance of every grade of conducting.
Between high-pressure electronic switch and high-pressure electronic switch, by metal partion (metp), separate, can effectively improve the radiating effect of this high-pressure electronic switch, effectively guarantee that this device can normally work, and can also reduce the damage of high-pressure electronic switch.
Power supply is the high voltage direct current generator that intermediate frequency multiplication of voltage mode is exported, and its output adjustable extent, at 0 ~ 60KV, can regulate its firing potential as required.
Specific works process is as follows:
1), according to the loop calibration Apparent discharge magnitude (demarcation is put in office) in accompanying drawing 1;
2), DC boosting: first boost to required trial voltage according to rules, by 4 pairs of storage capacitors 5 of charging resistor charge (in the process of boosting storage capacitor 5 effect be energy storage);
3), start effluve, test is put in startup office: the switching signal of first turn-offing High voltage output and be power supply 3(object and be DC boosting has spontaneous office to put needs shielding), then starting effluve is that storage capacitor 5(is closed by high-pressure electronic switch), when storage capacitor 5 discharges, it is resonant capacitance, now storage capacitor 5 and inductive coil form LC vibration, by storage capacitor 5 and inductive coil, form LC resonant tank, form attenuation oscillasion impulse, and measure the partial discharge quantity of inductive coil; Along with the raising of trial voltage, the size of partial discharge quantity changes thereupon, can judge the dielectric level of inductive coil, then according to national standard, judges whether inductive coil can continue operation or change;
4), repeat second step and the 3rd step, along with the rising of trial voltage, office high-volume amplifies thereupon, by judgement, office high-volume changes, and judges the dielectric level of inductive coil.
embodiment 1
In the test findings comparison of using different testing programs to do to same two air reactors:
One for the air reactor that do not put into operation (10kV current-limiting reactor, 4.8mH); One for the air reactor that put into operation 8 years (10kV current-limiting reactor, 4.6mH); Test is put in office: adopt this patent that scheme is provided, resonant capacitance is storage capacitor 5(capacity 1.01uF for holding without office's electric discharge), wherein, 85pC is put in background office, as table 2:
Table 2
Contrast two testing programs and the reactor having put into operation 8 years can be detected and have insulation hidden danger, the employing office mode of putting detects at direct current 25kV place just has obvious increase, so local discharge test can shift to an earlier date anticipation, and can not damage because of test the body of reactor.When contrast table 1 needs firing potential to be increased to direct current 50kV and 55KV, could effectively detect reactor has Insulation Problems, and this this device effectively reduces the voltage that DC is pressed in initial electric discharge, and effectively protective device is not damaged.
The utility model utilizes high-pressure electronic switchgear to complete switching on and off of test loop, to produce inductive coil, carry out pulse oscillating voltage, high-pressure electronic switchgear has accurately controlled, have to utilize and improve controlled range, by high-pressure electronic switchgear to storage capacitor, discharge and recharge to realize discharging and recharging inductive coil device to be measured, whether adopt the drawn game of test voltage divider to put Impedance measurement device carries out detection office to inductive coil device to be measured and high-volume differentiates inductive coil device to be measured and damage simultaneously, by this device, can effectively reduce starting potential and guarantee that the insulation of inductive coil is not damaged.
It is to be understood that: the above is only preferred implementation of the present utility model; for those skilled in the art; do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (5)
1. the insulation ag(e)ing based on inductive coil judges system, it is characterized in that: comprise Long-distance Control cabinet, power supply, charging resistor, storage capacitor, high-pressure electronic switchgear, Impedance measurement device is put in the drawn game of test voltage divider, described power supply, charging resistor, storage capacitor and inductive coil device to be measured are composed in series closed-loop path, it is in parallel with inductive coil device to be measured that the series arm that Impedance measurement device forms is put in the drawn game of described test voltage divider, described high-pressure electronic switchgear is parallel to the series arm of storage capacitor and inductive coil installation composition to be measured, described Long-distance Control cabinet is connected with power supply by major loop wiring, described Long-distance Control cabinet is also connected with high-pressure electronic switchgear with crossing communication wiring, described Long-distance Control cabinet is connected with oscillograph by test wiring, the drawn game of described test voltage divider is put Impedance measurement device and all by communication wiring, is connected with oscillograph.
2. the insulation ag(e)ing judgement system based on inductive coil according to claim 1, is characterized in that: described power supply is the high voltage direct current generator that intermediate frequency multiplication of voltage mode is exported, and its output adjustable extent is at 0 ~ 60KV.
3. the insulation ag(e)ing based on inductive coil according to claim 1 judges system, it is characterized in that: described high-pressure electronic switchgear is comprised of the high-pressure electronic switch stack of some layers of series connection, wherein, high-pressure electronic switch is comprised of controllable silicon, fly-wheel diode, equalizing resistance, described controllable silicon, fly-wheel diode, equalizing resistance are in parallel, controllable silicon and fly-wheel diode Opposite direction connection.
4. the insulation ag(e)ing judgement system based on inductive coil according to claim 3, is characterized in that: between described high-pressure electronic switch and high-pressure electronic switch, by metal partion (metp), separate.
5. the insulation ag(e)ing judgement system based on inductive coil according to claim 3, is characterized in that: described communication wiring is light wiring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420340928.XU CN203894373U (en) | 2014-06-24 | 2014-06-24 | Insulation aging judgment system based on inductive coil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420340928.XU CN203894373U (en) | 2014-06-24 | 2014-06-24 | Insulation aging judgment system based on inductive coil |
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| Publication Number | Publication Date |
|---|---|
| CN203894373U true CN203894373U (en) | 2014-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420340928.XU Expired - Lifetime CN203894373U (en) | 2014-06-24 | 2014-06-24 | Insulation aging judgment system based on inductive coil |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104698353A (en) * | 2015-03-11 | 2015-06-10 | 广西电网有限责任公司电力科学研究院 | Temperature monitoring based insulating defect detection system of dry type electric reactor |
| CN110108991A (en) * | 2019-05-13 | 2019-08-09 | 中国电力科学研究院有限公司 | A kind of detection device that the insulation of high speed machine switch repulsion coil disk is weak |
| CN112698124A (en) * | 2020-12-03 | 2021-04-23 | 成都宏明电子股份有限公司 | Method for judging whether polar medium dry-type high-voltage capacitor meets expected service life or not |
-
2014
- 2014-06-24 CN CN201420340928.XU patent/CN203894373U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104698353A (en) * | 2015-03-11 | 2015-06-10 | 广西电网有限责任公司电力科学研究院 | Temperature monitoring based insulating defect detection system of dry type electric reactor |
| CN110108991A (en) * | 2019-05-13 | 2019-08-09 | 中国电力科学研究院有限公司 | A kind of detection device that the insulation of high speed machine switch repulsion coil disk is weak |
| CN110108991B (en) * | 2019-05-13 | 2022-07-01 | 中国电力科学研究院有限公司 | Detection apparatus for weak insulation of repulsion coil panel of high-speed mechanical switch |
| CN112698124A (en) * | 2020-12-03 | 2021-04-23 | 成都宏明电子股份有限公司 | Method for judging whether polar medium dry-type high-voltage capacitor meets expected service life or not |
| CN112698124B (en) * | 2020-12-03 | 2023-07-14 | 成都宏明电子股份有限公司 | Method for judging whether polar medium dry type high-voltage capacitor accords with expected service life |
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| GR01 | Patent grant |