CN205787019U - A kind of disconnecting switch opening-closing bus charging current test loop protection device - Google Patents
A kind of disconnecting switch opening-closing bus charging current test loop protection device Download PDFInfo
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- CN205787019U CN205787019U CN201620618703.5U CN201620618703U CN205787019U CN 205787019 U CN205787019 U CN 205787019U CN 201620618703 U CN201620618703 U CN 201620618703U CN 205787019 U CN205787019 U CN 205787019U
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- vfto
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- disconnecting switch
- protection device
- test
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Abstract
This utility model provides a kind of disconnecting switch opening-closing bus charging current test loop protection device；Avoid testing transformer injury when carrying out the special tests such as the little capacity current of folding, to the high frequency VFTO overvoltage produced in process of the test.It includes the wire for electrically connecting testing transformer and test product, and wears the some magnet rings being fixed on wire middle part surface.This utility model is practical, and under high frequency state, magnet ring eddy-current loss etc. can consume VFTO energy, such that it is able to play the purpose reducing VFTO amplitude；And magnet ring can induce higher induction reactance in conductive line surfaces, thus it is possible to vary VFTO steepness, thus reduce the VFTO steepness arriving testing transformer；Make relatively simple, use suitable magnet ring to be placed in conductive line surfaces and fix；VFTO amplitude during owing to reducing the test of extra-high voltage test product, therefore improves success of the test rate.
Description
Technical field
This utility model relates to testing transformer protection device, is specially a kind of disconnecting switch opening-closing bus charging current
Test loop protection device.
Background technology
Relevant criterion is pointed out, rated voltage 72.5kV particularly, on 550kV and higher system voltage grade, works as GIS
During the little capacity current of the disconnecting switch folding of (gas insulating enclosed switch equipment), destructiveness over the ground may be produced and put
Electricity.In recent years, by the investigation in worldwide, get the reason of this situation of generation clear, and (the quickest to VFTO
Transient overvoltage phenomenon) along with the disconnecting switch of Cubicle Gas-Insulated Switchgear fulfil capacitive current switching this
Kind intrinsic functional time the complexity of phenomenon that produces, had and profoundly understood.And thus may determine that correct disconnecting switch
Design to avoiding producing disruptive discharge over the ground it is critical that.
Through research, can produce VFTO in the capacity current process of the test that folding is little, its frequency range is 1MHz to tens
MHz, under this high frequency situations, the distribution of power frequency testing transformer winding inter-turn voltage depends primarily on distributed capacitance parameter, this
May result in transformator turn-to-turn insulation in the case of Zhong to work the mischief.Therefore the frequency of the VFTO of power frequency testing transformer it is lowered into
Rate and amplitude important in inhibiting.
The suppression VFTO infringement used in prior art protects the method for power frequency testing transformer mainly to have two kinds: (1)
Series connection protective resistance, protective resistance of connecting between power frequency testing transformer and test product, the method can pass through resistance consumption
VFTO energy thus reduce its amplitude, finally reach protection transformator purpose；(2) increase protection ball gap, become at industrial frequency experiment
Depressor exit parallel connection protection ball gap, the method can limit VFTO amplitude.The ball when voltage magnitude exceedes ball gap protection amplitude
I.e. occur electric discharge phenomena that VFTO can not be applied to transformator between gap, thus reach to protect purpose.
But, series connection protective resistance have two shortcomings: a protective resistance typically uses resistance wire coiling to form, and for around
Its turn-to-turn of quasi-resistance processed equally exists turn-to-turn capacitance, and for the high frequency voltages such as VFTO, its turn-to-turn capacitance plays a leading role, its
The effect consuming VFTO energy reduction amplitude is the most inconspicuous；B protective resistance is only capable of reducing the purpose of VFTO amplitude, can not
Reduce the purpose of its frequency；Increase protection ball gap, can the VFTO of more Efficient Support higher magnitude will not apply to work
Frequently testing transformer, but simultaneously because carry out GIS disconnecting switch folding little capacity current test time, relatively high-amplitude often occurs
The VFTO waveform of value, so makes to protect ball gap meeting frequent movement, can cause the interruption of test and the reduction of checkout level.
Utility model content
For problems of the prior art, this utility model provides a kind of disconnecting switch opening-closing bus charging current examination
Test loop protection device；Avoid testing transformer when carrying out the special tests such as the little capacity current of folding, in process of the test
The injury of the high frequency VFTO overvoltage produced.
This utility model is to be achieved through the following technical solutions:
A kind of disconnecting switch opening-closing bus charging current test loop protection device, including for electrically connecting testing transformer
With the wire of test product, and wear the some magnet rings being fixed on wire middle part surface.
Preferably, wire uses aluminum hard tube wire.
Preferably, all magnet rings are that equal diameter equal in width is arranged, and close-packed arrays is fixed on wire.
Preferably, the length of magnet ring distribution accounts for the 40%-60% of conductor length.
Preferably, a length of 1.8-2.2m of wire, a diameter of 18-22cm.
Preferably, the two ends of wire are hemispherical setting.
Compared with prior art, this utility model has a following useful technique effect:
This utility model one disconnecting switch opening-closing bus charging current test loop protection device, practical, at height
Frequently under state, magnet ring eddy-current loss etc. can consume VFTO energy, such that it is able to play the purpose reducing VFTO amplitude；And magnet ring
Higher induction reactance can be induced in conductive line surfaces, thus it is possible to vary VFTO steepness, thus the VFTO reducing arrival testing transformer is steep
Degree；Make relatively simple, use suitable magnet ring to be placed in conductive line surfaces and fix；Owing to reducing the test of extra-high voltage test product
Time VFTO amplitude, therefore improve success of the test rate.
Accompanying drawing explanation
Fig. 1 is the structural representation of device described in this utility model example.
Fig. 2 is the profile of device described in this utility model example.
Fig. 3 is the equivalent circuit diagram of device described in this utility model example.
In figure: 1 is magnet ring, 2 is wire.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is described in further detail, described in be to explanation of the present utility model
It not to limit.
This utility model one disconnecting switch opening-closing bus charging current test loop protection device, as it is shown in figure 1, its bag
Include the wire 2 for electrically connecting testing transformer and test product, and wear the some magnet rings 1 being fixed on wire 2 middle part surface.This
In preferred embodiment, wire 2 uses aluminum hard tube wire.
Wherein, all magnet rings 1 are arranged in equal diameter equal in width, and close-packed arrays is fixed on wire 2.The length of magnet ring 1 distribution
Degree accounts for the 40%-60% of wire 2 length.The a length of 1.8-2.2m of wire 2, a diameter of 18-22cm.The two ends of wire 2 are in half
Spherical setting.As in figure 2 it is shown, in this preferred embodiment, conductor length is 2m, diameter 20cm, a length of 1m of magnet ring distribution.
During use, wire 2 is for joint test transformator and test product, and by it, test product is applied voltage x current.Described
The equivalent circuit of magnet ring 1 and wire 2 is as it is shown on figure 3, due to variable inductance L and the existence of resistance R, therefore this device has reduction
Very fast transient overvoltage row wave steepness and the effect of amplitude.Described magnet ring 1 and wire 2 with the use of, can meet relevant
The test requirements document of standard, and reach the purpose of protection test transformator simultaneously.
This utility model one disconnecting switch opening-closing bus charging current test loop protection device, connects examination by wire
Test transformator and test product, and by it, test product is applied voltage x current, make use of the magnet ring in high frequency can be in conductive line surfaces sense
Should go out the features such as the eddy-current loss that the biggest induction reactance and magnet ring self produce, thus reach to reduce and arrive the quickest of transformator
Transient overvoltage steepness and the purpose of amplitude.Try in the GIS disconnecting switch opening-closing bus charging current carrying out correlation standard
When testing, it is to avoid produce very quickly transient overvoltage.
Claims (6)
1. a disconnecting switch opening-closing bus charging current test loop protection device, it is characterised in that include for electrically connecting
Testing transformer and the wire (2) of test product, and wear the some magnet rings (1) being fixed on wire (2) middle part surface.
A kind of disconnecting switch opening-closing bus charging current test loop the most according to claim 1 protection device, its feature
Being, wire (2) uses aluminum hard tube wire.
A kind of disconnecting switch opening-closing bus charging current test loop the most according to claim 1 protection device, its feature
Being, all magnet rings (1) are arranged in equal diameter equal in width, and close-packed arrays is fixed on wire (2).
A kind of disconnecting switch opening-closing bus charging current test loop the most according to claim 1 protection device, its feature
Being, the length that magnet ring (1) is distributed accounts for the 40%-60% of wire (2) length.
A kind of disconnecting switch opening-closing bus charging current test loop the most according to claim 1 protection device, its feature
It is, a length of 1.8-2.2m of wire (2), a diameter of 18-22cm.
A kind of disconnecting switch opening-closing bus charging current test loop the most according to claim 1 protection device, its feature
Being, the two ends of wire (2) are hemispherical setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620618703.5U CN205787019U (en) | 2016-06-21 | 2016-06-21 | A kind of disconnecting switch opening-closing bus charging current test loop protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620618703.5U CN205787019U (en) | 2016-06-21 | 2016-06-21 | A kind of disconnecting switch opening-closing bus charging current test loop protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205787019U true CN205787019U (en) | 2016-12-07 |
Family
ID=58129852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620618703.5U Active CN205787019U (en) | 2016-06-21 | 2016-06-21 | A kind of disconnecting switch opening-closing bus charging current test loop protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205787019U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106680702A (en) * | 2016-12-22 | 2017-05-17 | 中国西电电气股份有限公司 | Loop for limiting voltage rise by current switching ability of disconnecting switch current and method thereof |
-
2016
- 2016-06-21 CN CN201620618703.5U patent/CN205787019U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106680702A (en) * | 2016-12-22 | 2017-05-17 | 中国西电电气股份有限公司 | Loop for limiting voltage rise by current switching ability of disconnecting switch current and method thereof |
| CN106680702B (en) * | 2016-12-22 | 2019-09-17 | 中国西电电气股份有限公司 | A kind of raised circuit of disconnecting switch electric current folding ability test limitation voltage and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210818 Address after: 710077 No. 18 West Second Ring Road, Shaanxi, Xi'an Patentee after: XI'AN HIGH VOLTAGE APPARATUS RESEARCH INSTITUTE Co.,Ltd. Address before: 710075 Shaanxi city of Xi'an Province Tang Hing Road No. 7 Patentee before: CHINA XD ELECTRIC Co.,Ltd. Patentee before: XI'AN HIGH VOLTAGE APPARATUS RESEARCH INSTITUTE Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 710077 No. 18 West Second Ring Road, Shaanxi, Xi'an Patentee after: Xi'an High Voltage Electrical Apparatus Research Institute Co.,Ltd. Address before: 710077 No. 18 West Second Ring Road, Shaanxi, Xi'an Patentee before: XI'AN HIGH VOLTAGE APPARATUS RESEARCH INSTITUTE Co.,Ltd. |