CN107329059A - The superimposed voltage detection means and method of free conducting particle in a kind of GIS - Google Patents
The superimposed voltage detection means and method of free conducting particle in a kind of GIS Download PDFInfo
- Publication number
- CN107329059A CN107329059A CN201710593728.3A CN201710593728A CN107329059A CN 107329059 A CN107329059 A CN 107329059A CN 201710593728 A CN201710593728 A CN 201710593728A CN 107329059 A CN107329059 A CN 107329059A
- Authority
- CN
- China
- Prior art keywords
- voltage
- gis
- resistance
- electric capacity
- detection means
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a kind of superimposed voltage detection means of free conducting particle in GIS, including impulse voltage generator, capacitance, protection ball gap, GIS, RC divider, protective resistance and direct voltage source.The invention also discloses a kind of superimposed voltage detection method of free conducting particle in GIS, apply negative polarity d. c superposition positive polarity surge voltage to GIS 3 times, apply negative polarity d. c superposition negative polarity surge voltage 3 times, by detecting in GIS that whether occurring electric discharge judges whether free conducting particle.The present invention can be to exist in effective detection GIS free conducting particle pollutant, can apply in delivery test and field test.
Description
Technical field
The invention belongs to gas insulated switchgear (GIS) insulation defect protection field, and in particular in a kind of GIS
The superimposed voltage detection means and method of free conducting particle.
Background technology
SF6Cubicle Gas-Insulated Switchgear (Gas-insulated switchgear, GIS) has floor space
It is small, by natural environment influence is small, safe and reliable to operation, maintenance and the advantages of long maintenance period, at home and abroad in power system
Extensive use is arrived.SF in uniform electric field6Gas has good insulating properties, and it insulate when there is internal field's concentration
Serious reduction occurs in intensity.GIS, can not due to there is mechanical collision and vibration equipment in production, transport and assembling process
Produce free electrically conductive particles pollutant with can avoiding, these electrically conductive particles can significantly reduce equipment withstanding voltage, even result in absolutely
Edge accident.Operation troubles statistics shows that free conducting particle is a main cause for causing GIS failures.Therefore, explore effective
Free conducting particle detection means for generation of preventing accident, ensure GIS operation steadily in the long term it is significant.
At present, generally using ac voltage withstanding combination partial discharge test and impulse withstand voltage experiment pair in live commissioning test
GIS insulating properties are examined.Particulate by the effect of periodicity electric field force due to being difficult take-off under alternating voltage, and pole is not
SF in uniform electric field6" hump " phenomenon can be presented with the change of air pressure in the breakdown voltage of gas, when GIS operating air pressures are higher than critical
During air pressure, shelf depreciation hardly occurs before gas breakdown, now Partial Discharge Detection means fail.Surge voltage is due to effect
Time is short, and particulate is difficult to occur take-off and penetrability motion, it is impossible to carry out effective detection to free particulate.Due to live at present
Commissioning test project is difficult to carry out effective detection to free conducting particle in GIS, therefore, it is necessary to new detection means is studied,
Improve the examination to GIS insulating properties in the commissioning test of scene.
The content of the invention
, can be effective it is an object of the invention to provide a kind of superimposed voltage detection means of free conducting particle in GIS
Detect free conducting particle in GIS.
Another object of the present invention is to provide a kind of superimposed voltage detection method of free conducting particle in GIS.
To reach above-mentioned purpose, the technical solution adopted by the present invention is：
The superimposed voltage detection means of free conducting particle in a kind of GIS, including：
Impulse voltage generator 1, for producing surge voltage；
Capacitance 2, connects with the output end of the impulse voltage generator 1, for isolated DC voltage；
Ball gap 3 is protected, it is in parallel with the capacitance 2, damaged to avoid capacitance 2 from bearing too high voltages；
GIS4, it is in parallel with the impulse voltage generator 1；
RC divider 5, measurement for superimposed voltage waveform in parallel with the GIS4；
Protective resistance 6, connects with the RC divider 5, for reducing influence of the surge voltage to direct voltage source 7；
Direct voltage source 7, connects with the protective resistance 6, for producing DC voltage；
The impulse voltage generator 1 includes electric capacity 1-1, switch 1-2, wave front resistance 1-4, wave terminal resistance 1-3 and electric capacity
Divider 1-5；The electric capacity 1-1 is in parallel with wave terminal resistance 1-3 by switch 1-2, and wave terminal resistance 1-3 passes through wave front resistance 1-4
It is in parallel with capacitive divider 1-5；
The RC divider 5 includes high-voltage arm resistance 5-1, low-voltage arm resistance 5-3 and high voltage arm capacitor 5-2, low-voltage arm
Electric capacity 5-4；The high-voltage arm resistance 5-1 and high voltage arm capacitor 5-2 constitutes the first parallel circuit；The low-voltage arm resistance 5-3 with
Low-voltage arm electric capacity 5-4 constitutes the second parallel circuit, first parallel circuit and the second parallel circuit in series；
The direct voltage source 7 includes high voltage silicon rectifier stack 7-1, high voltage silicon rectifier stack 7-2, high voltage silicon rectifier stack 7-3, high voltage silicon rectifier stack 7-4, electricity
Hold 7-5, electric capacity 7-6, electric capacity 7-7, electric capacity 7-8 and charging transformer 7-9；High voltage silicon rectifier stack 7-1~the 7-4 and electric capacity 7-5~
7-8 and charging transformer 7-9 composition two-stage voltage-multiplying circuits；
The output area of the impulse voltage generator 1 is 0~1600kV；
The capacitance of the capacitance 2 is 30nF, and the working voltage grade of the GIS 4 is 500kV；
The resistance of the protective resistance 6 is 300k Ω；
The output area of the direct voltage source 7 is 0~600kV；
The superimposed voltage detection method of free conducting particle, comprises the following steps in a kind of GIS：
S1：Calculate GIS DC voltage maximum amplitude U that may be present in breaker open operationdc, calculation formula is as follows：
Wherein, UoFor GIS working voltage；
S2：It is U to apply amplitude to GISdcNegative polarity d. c voltage；
S3. positive polarity surge voltage U is superimposed to GIS+Imp, the calculation formula of positive polarity surge voltage peak value is：U+Imp=Us
+Udc
Wherein, UsFor the GIS pressure-resistant amplitude of rated impulse；
S4. after the completion of positive polarity impulse voltage test described in step S3, negative polarity d. c voltage is applied to GIS again, directly
Stream voltage magnitude is Udc, then superposition peak value is U again+ImpPositive polarity surge voltage, the process is repeated 3 times；
S5. negative polarity d. c voltage is applied to GIS, DC voltage amplitude is Udc, negative polarity surge voltage is then superimposed, should
Process is repeated 3 times, and the calculation formula of negative polarity surge voltage amplitude is：
U-Imp=Us-Udc；
If S6. there are electric discharge phenomena in GIS in above-mentioned 6 superpositions experiment, illustrate there is free conducting particle in GIS
Pollutant；
The time for applying negative polarity d. c voltage in described step S2, S4, S5 to GIS is 1min.
Compared with prior art, what the technical solution adopted by the present invention was produced has the beneficial effect that：
The superimposed voltage detection means of free conducting particle in a kind of GIS that the present invention is provided, can be with effective detection GIS
The free conducting particle pollutant of presence, can apply in delivery test and field test, it is simple to operate, be easy to promote.
Brief description of the drawings
Fig. 1 is the superimposed voltage detection means of free conducting particle in a kind of GIS of one embodiment of the invention offer
Circuit block diagram.
Embodiment
With reference to the accompanying drawings and examples, technical scheme is described in detail.
Referring to accompanying drawing 1, the present embodiment provides a kind of superimposed voltage detection means of free conducting particle in GIS, including：
Impulse voltage generator 1, the impulse voltage generator 1 includes electric capacity 1-1, switch 1-2, wave front resistance 1-4, ripple
Tail resistance 1-3 and capacitive divider 1-5, wherein, electric capacity 1-1 is in parallel with wave terminal resistance 1-3 by switch 1-2, wave terminal resistance 1-3
It is in parallel with capacitive divider 1-5 by wave front resistance 1-4；In the present embodiment, the output area of impulse voltage generator 1 is preferably
0~1600kV；
Capacitance 2, connects with the output end of impulse voltage generator 1；In the present embodiment, the capacitance of capacitance 2 is excellent
Elect 30nF as；
Ball gap 3 is protected, it is in parallel with capacitance 2；
GIS 4, connects with capacitance 2；In the present embodiment, GIS 4 working voltage grade is preferably 500kV；
RC divider 5, in parallel with GIS4, the RC divider 5 includes high-voltage arm resistance 5-1, low-voltage arm resistance 5-3
With high voltage arm capacitor 5-2, low-voltage arm electric capacity 5-4, wherein, high-voltage arm resistance 5-1 and high voltage arm capacitor 5-2 compositions first are in parallel electric
Road；Low-voltage arm resistance 5-3 and low-voltage arm electric capacity 5-4 constitutes the second parallel circuit, the first parallel circuit electricity in parallel with second
Connect on road；
Protective resistance 6, connects respectively with RC divider 5 and direct voltage source 7；In the present embodiment, the resistance of protective resistance 6
Value is preferably 300k Ω；
Direct voltage source 7, connects with protective resistance 6, and the direct voltage source 7 includes high voltage silicon rectifier stack 7-1, high voltage silicon rectifier stack 7-
2nd, high voltage silicon rectifier stack 7-3, high voltage silicon rectifier stack 7-4, electric capacity 7-5, electric capacity 7-6, electric capacity 7-7, electric capacity 7-8 and charging transformer 7-9, described
High voltage silicon rectifier stack 7-1~7-4 and electric capacity 7-5~7-8 composition two-stage voltage-multiplying circuits；In the present embodiment, the output model of direct voltage source 7
Enclose preferably 0~600kV.
The present embodiment additionally provides a kind of superimposed voltage detection method of free conducting particle in GIS, due in direct current
The easy take-off of free conducting particle and motion are depressed, causes electric field distortion, and the detection that surge voltage is concentrated for internal field
It is more effective, therefore combine the advantage of both voltages, it is proposed that the DC stacked surge voltage detection side of free conducting particle
Method.Free conducting particle in GIS 4 is occurred take-off by applying DC voltage, and setting is presented now near high-pressure conductive
As then applying surge voltage, realizing the detection to free conducting particle.
The detection method comprises the following steps：
S1. the DC voltage maximum amplitude U that may be present in breaker open operation of GIS 4 are calculateddc, i.e. power frequency operation voltage
Peak-peak, calculation formula is as follows：
Wherein, UoFor GIS working voltage.
It is now micro- because setting phenomenon can be presented in free conducting particle near high-pressure conductor under negative polarity d. c voltage
Distortion effect of the grain to electric field is most strong, is most easily detected.And DC voltage is higher, easier present erects phenomenon, therefore direct current
Pressure amplitude value should be as high as possible.Meanwhile, DC voltage is no more than maximum DC voltage that may be present in GIS 4, to ensure not
GIS is damaged, therefore the peak-peak of selection power frequency operation voltage.In the present embodiment, GIS working voltage is preferably
500kV, therefore, GIS DC voltage maximum amplitude
S2. it is U to apply amplitude to GISdcNegative polarity d. c voltage.
In the present embodiment, to make particulate occur to move and reach stable motion state, it is easy to voltage detecting, negative polarity is straight
It is preferably 1min to flow voltage application time.
S3. positive polarity surge voltage is superimposed to GIS, the calculation formula of positive polarity surge voltage peak value is：U+Imp=Us+Udc
Wherein, UsFor the GIS pressure-resistant amplitude of rated impulse, to ensure that superimposed voltage peak value impacts with GIS rated endurances
Voltage magnitude is identical.
In the present embodiment, the GIS pressure-resistant amplitude U of rated impulsesPreferably 1050kV, therefore, U+Imp=Us+Udc=
1050kV+400kV=1450kV, i.e., the peak value that positive polarity surge voltage is superimposed to GIS is 1450KV.
S4. after the completion of positive polarity impulse voltage test described in step S3, negative polarity d. c voltage is applied to GIS again, directly
Stream voltage magnitude is Udc, then superposition peak value is U again+ImpPositive polarity surge voltage, the process is repeated 3 times.
In the present embodiment, the time for applying negative polarity d. c voltage to GIS is preferably 1min；
S5. negative polarity d. c voltage is applied to GIS, DC voltage amplitude is Udc, negative polarity surge voltage is then superimposed, is born
The calculation formula of polarity surge voltage amplitude is U-Imp=Us-Udc。
In the present embodiment, the time for applying negative polarity d. c voltage to GIS is preferably 1min, and GIS rated impulse is pressure-resistant
Amplitude UsPreferably 1050kV, GIS DC voltage maximum amplitude UdcCalculate 400KV, therefore U-Imp=Us-Udc=
1050kV-400kV=650kV, repeats the process 3 times.
If S6. there are electric discharge phenomena in GIS in above-mentioned 6 superpositions experiment, illustrate there is free conducting particle in GIS
Pollutant.
Description of the invention and application be illustrative, be not wishing to limit the scope of the invention in above-described embodiment.
The deformation and change of embodiments disclosed herein are possible, the embodiments for the ordinary skill of those this areas is any
Replacement and equivalent various parts be known.Without departing from the spirit or essential characteristics of the invention, it is of the invention
Can in other forms, structure, arrangement, ratio, and realized with other components, material and part.The present invention is not being departed from
In the case of scope and spirit, other deformations and change can be carried out to embodiments disclosed herein.
Claims (10)
1. the superimposed voltage detection means of free conducting particle in a kind of GIS, including：
Impulse voltage generator (1), for producing surge voltage；
Capacitance (2), connects with the output end of the impulse voltage generator (1), for isolated DC voltage；
Ball gap (3) is protected, it is in parallel with the capacitance (2), damaged to avoid capacitance (2) from bearing too high voltages；
GIS (4), it is in parallel with the impulse voltage generator (1)；
RC divider (5), measurement for superimposed voltage waveform in parallel with the GIS (4)；Protective resistance (6), it is and described
RC divider (5) is connected, for reducing influence of the surge voltage to direct voltage source (7)；
Direct voltage source (7), connects with the protective resistance (6), for producing DC voltage.
2. detection means according to claim 1, wherein, it is preferred that the impulse voltage generator (1) includes electric capacity
(1-1), switch (1-2), wave front resistance (1-4), wave terminal resistance (1-3) and capacitive divider (1-5)；Electric capacity (1-1) warp
Cross switch (1-2) in parallel with wave terminal resistance (1-3), wave terminal resistance (1-3) is by wave front resistance (1-4) and capacitive divider (1-
5) it is in parallel.
3. detection means according to claim 1, wherein, the RC divider (5) include high-voltage arm resistance (5-1),
Low-voltage arm resistance (5-3) and high voltage arm capacitor (5-2), low-voltage arm electric capacity (5-4)；The high-voltage arm resistance (5-1) and high-voltage arm
Electric capacity (5-2) constitutes the first parallel circuit；The low-voltage arm resistance (5-3) and the electricity in parallel of low-voltage arm electric capacity (5-4) composition second
Road, first parallel circuit and the second parallel circuit in series.
4. detection means according to claim 1, wherein, the direct voltage source (7) includes high voltage silicon rectifier stack (7-1), height
Press silicon stack (7-2), high voltage silicon rectifier stack (7-3), high voltage silicon rectifier stack (7-4), electric capacity (7-5), electric capacity (7-6), electric capacity (7-7), electric capacity (7-
8) with charging transformer (7-9)；High voltage silicon rectifier stack (7-1)~(7-4) and electric capacity (7-5)~(7-8) and charging transformer (7-
9) two-stage voltage-multiplying circuit is constituted.
5. detection means according to claim 1 or 2, wherein, the output area of the impulse voltage generator (1) is 0
~1600kV.
6. detection means according to claim 1, wherein, the capacitance of the capacitance (2) is 30nF, the GIS (4)
Working voltage grade be 500kV.
7. detection means according to claim 1, wherein, the resistance of the protective resistance (6) is 300k Ω.
8. the detection means according to claim 1 or 4, wherein, the output area of the direct voltage source (7) for 0~
600kV。
9. the superimposed voltage detection method of free conducting particle, comprises the following steps in a kind of GIS：
S1：Calculate GIS DC voltage maximum amplitude U that may be present in breaker open operationdc, calculation formula is as follows：
<mrow>
<msub>
<mi>U</mi>
<mrow>
<mi>d</mi>
<mi>c</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<msub>
<mi>U</mi>
<mi>o</mi>
</msub>
<msqrt>
<mn>3</mn>
</msqrt>
</mfrac>
<mo>&CenterDot;</mo>
<msqrt>
<mn>2</mn>
</msqrt>
</mrow>
Wherein, UoFor GIS working voltage；
S2：It is U to apply amplitude to GISdcNegative polarity d. c voltage；
S3. positive polarity surge voltage U is superimposed to GIS+Imp, the calculation formula of positive polarity surge voltage peak value is：U+Imp=Us+Udc
Wherein, UsFor the GIS pressure-resistant amplitude of rated impulse；
S4. after the completion of positive polarity impulse voltage test described in step S3, negative polarity d. c voltage, direct current are applied to GIS again
Pressure amplitude value is Udc, then superposition peak value is U again+ImpPositive polarity surge voltage, the process is repeated 3 times；
S5. negative polarity d. c voltage is applied to GIS, DC voltage amplitude is Udc, then it is superimposed negative polarity surge voltage, the process
It is repeated 3 times, the calculation formula of negative polarity surge voltage amplitude is：U-Imp=Us-Udc；
If S6. there are electric discharge phenomena in GIS in above-mentioned 6 superpositions experiment, illustrate there is free conducting particle pollution in GIS
Thing.
10. detection method according to claim 5, wherein, negative polarity d. c is applied to GIS in described step S2, S4, S5
The time of voltage is 1min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710593728.3A CN107329059A (en) | 2017-07-19 | 2017-07-19 | The superimposed voltage detection means and method of free conducting particle in a kind of GIS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710593728.3A CN107329059A (en) | 2017-07-19 | 2017-07-19 | The superimposed voltage detection means and method of free conducting particle in a kind of GIS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107329059A true CN107329059A (en) | 2017-11-07 |
Family
ID=60226585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710593728.3A Pending CN107329059A (en) | 2017-07-19 | 2017-07-19 | The superimposed voltage detection means and method of free conducting particle in a kind of GIS |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107329059A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108562838A (en) * | 2018-01-16 | 2018-09-21 | 西安交通大学 | A kind of portable compact surge voltage generating means |
| CN108845235A (en) * | 2018-07-17 | 2018-11-20 | 南瑞集团有限公司 | A kind of high voltage direct current superposition impulse voltage test protection device |
| CN111665421A (en) * | 2020-06-03 | 2020-09-15 | 西安交通大学 | Metal particle detection method for gas insulated substation |
| CN111948719A (en) * | 2020-08-24 | 2020-11-17 | 国网宁夏电力有限公司电力科学研究院 | GIS internal foreign matter diagnosis device and diagnosis method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6319570A (en) * | 1986-07-11 | 1988-01-27 | Hitachi Ltd | Testing voltage generator for gas insulating apparatus |
| CN102135595A (en) * | 2011-02-22 | 2011-07-27 | 南方电网科学研究院有限责任公司 | Device for direct-current and impulse superposition voltage test in high-altitude region |
| CN102253317A (en) * | 2011-04-28 | 2011-11-23 | 南方电网科学研究院有限责任公司 | Alternating current, direct current and impulse joint superposition test method for extra-high voltage transmission level equipment used in high-altitude area |
| CN102507397A (en) * | 2011-11-22 | 2012-06-20 | 云南电力试验研究院（集团）有限公司电力研究院 | Acousto-electric jointed direct current detection method for metal electric conductive particles in GIS |
| CN102680574A (en) * | 2012-05-14 | 2012-09-19 | 云南电力试验研究院（集团）有限公司电力研究院 | GIS (Gas Insulated Switchgear) inner particle detecting method adopting polarity-reversal direct-current voltage |
| CN102841040A (en) * | 2012-08-23 | 2012-12-26 | 云南电力试验研究院（集团）有限公司电力研究院 | Alternate current/direct current (AC/DC) superimposed system for detecting particles in gas insulated switchgear (GIS) |
| CN103344892A (en) * | 2013-07-12 | 2013-10-09 | 南方电网科学研究院有限责任公司 | Combined voltage testing system for direct currents and impacts of high-attitude area |
-
2017
- 2017-07-19 CN CN201710593728.3A patent/CN107329059A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6319570A (en) * | 1986-07-11 | 1988-01-27 | Hitachi Ltd | Testing voltage generator for gas insulating apparatus |
| CN102135595A (en) * | 2011-02-22 | 2011-07-27 | 南方电网科学研究院有限责任公司 | Device for direct-current and impulse superposition voltage test in high-altitude region |
| CN102253317A (en) * | 2011-04-28 | 2011-11-23 | 南方电网科学研究院有限责任公司 | Alternating current, direct current and impulse joint superposition test method for extra-high voltage transmission level equipment used in high-altitude area |
| CN102507397A (en) * | 2011-11-22 | 2012-06-20 | 云南电力试验研究院（集团）有限公司电力研究院 | Acousto-electric jointed direct current detection method for metal electric conductive particles in GIS |
| CN102680574A (en) * | 2012-05-14 | 2012-09-19 | 云南电力试验研究院（集团）有限公司电力研究院 | GIS (Gas Insulated Switchgear) inner particle detecting method adopting polarity-reversal direct-current voltage |
| CN102841040A (en) * | 2012-08-23 | 2012-12-26 | 云南电力试验研究院（集团）有限公司电力研究院 | Alternate current/direct current (AC/DC) superimposed system for detecting particles in gas insulated switchgear (GIS) |
| CN103344892A (en) * | 2013-07-12 | 2013-10-09 | 南方电网科学研究院有限责任公司 | Combined voltage testing system for direct currents and impacts of high-attitude area |
Non-Patent Citations (1)
| Title |
|---|
| 李庆民等: "GIS/GIL中金属微粒污染问题研究进展", 《高电压技术》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108562838A (en) * | 2018-01-16 | 2018-09-21 | 西安交通大学 | A kind of portable compact surge voltage generating means |
| CN108845235A (en) * | 2018-07-17 | 2018-11-20 | 南瑞集团有限公司 | A kind of high voltage direct current superposition impulse voltage test protection device |
| CN111665421A (en) * | 2020-06-03 | 2020-09-15 | 西安交通大学 | Metal particle detection method for gas insulated substation |
| CN111665421B (en) * | 2020-06-03 | 2022-03-22 | 西安交通大学 | Metal particle detection method for gas insulated substation |
| CN111948719A (en) * | 2020-08-24 | 2020-11-17 | 国网宁夏电力有限公司电力科学研究院 | GIS internal foreign matter diagnosis device and diagnosis method |
| CN111948719B (en) * | 2020-08-24 | 2024-06-04 | 国网宁夏电力有限公司电力科学研究院 | GIS internal foreign matter diagnosis device and diagnosis method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107329059A (en) | The superimposed voltage detection means and method of free conducting particle in a kind of GIS | |
| CN2912069Y (en) | Over-voltage protector of large power dynamo | |
| CN107797034A (en) | The detection means and method of dielectric recovery property after a kind of high-voltage sf6 circuit breaker arc | |
| CN105223483B (en) | A kind of DC transmission engineering insulator chain defect online detection method and device | |
| CN108008261A (en) | A kind of substation field lightning impulse and vibration lightning impulse voltage test device | |
| CN106226669A (en) | A kind of GIS combined-voltage Combined Trials System and method for | |
| CN104166079A (en) | Method for detecting capacitor element frequency impact current in capacitor voltage transformer | |
| CN207650356U (en) | Experiment power supply for large capacity mesolow dc circuit breaker short circuit switching test | |
| CN101526580A (en) | Method for testing on-site impact of gas insulated switchgear | |
| CN107271875A (en) | The pressure resistant testing device of voltage generation circuit and gas-insulating and fully-enclosed combined electrical apparatus | |
| CN105261268A (en) | Simulation model for voltage transformer ferromagnetic resonance | |
| CN206906530U (en) | The pressure resistant testing device of voltage generation circuit and gas-insulating and fully-enclosed combined electrical apparatus | |
| Wen et al. | On-site standard lightning impulse test for 1,100-kV gas-insulated switchgear with large capacitance | |
| CN2930032Y (en) | Novel high voltage switch cabinet | |
| CN203037813U (en) | Open circuit voltage wave generator | |
| CN110010351A (en) | A kind of extra-high voltage equalizing capacitor capacitance-resistance device | |
| Hardt et al. | The dynamic voltage/current characteristics of vacuum arcs after breakdown at currents in the lower kHz‐range | |
| CN105261269A (en) | Simulation model restraining ferromagnetic resonance of power system | |
| CN202586350U (en) | Alternating current switch cabinet having function of filtering | |
| CN206379723U (en) | Transformer neutral point earth protection device | |
| Cheng et al. | Study on Electromagnetic Interference of Electronic Transformer Under Operation of 330kV GIS Disconnector | |
| CN205787019U (en) | A kind of disconnecting switch opening-closing bus charging current test loop protection device | |
| CN102593817A (en) | Microcomputer arc-extinguishing and over-voltage protection integrated device | |
| CN105186473B (en) | A kind of restraining device of DC magnetic bias current for transformer high-voltage winding | |
| CN218727832U (en) | Alternating current superposition impulse voltage generating device based on phase synchronization |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171107 |
|
| RJ01 | Rejection of invention patent application after publication |