CN105974276A - GIS interval delivery withstand voltage test breakdown point locating method - Google Patents
GIS interval delivery withstand voltage test breakdown point locating method Download PDFInfo
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- CN105974276A CN105974276A CN201610260605.3A CN201610260605A CN105974276A CN 105974276 A CN105974276 A CN 105974276A CN 201610260605 A CN201610260605 A CN 201610260605A CN 105974276 A CN105974276 A CN 105974276A
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- gis
- high frequency
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- breakdown point
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- 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
- G01R31/1227—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 of components, parts or materials
- G01R31/1254—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 of components, parts or materials of gas-insulated power appliances or vacuum gaps
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Locating Faults (AREA)
Abstract
The invention provides a GIS interval delivery withstand voltage test breakdown point locating method. Grounding down leads at the head and tail of a GIS interval are each sleeved with a high-frequency current sensor, a high-frequency pulse current produced by breakdown flows through the head and tail high-frequency current sensors when breakdown occurs at any position in the GIS interval, and the breakdown position is determined based on the time difference between the detection signals of the two sensors. The method has the advantages of a small number of sensors needed and accurate and convenient locating.
Description
Technical field
The present invention relates to high voltage and insulation technology field, be specifically related to the pressure test of dispatching from the factory of a kind of GIS interval and hit
Wear independent positioning method background technology.
Gas insulated combined electrical equipment (Gas Insulated Switchgear, GIS) is the key equipment of electrical network,
Due to it, to have volume compact, reliability high a little, is widely applied the most at the scene.GIS's
Various tests are to ensure that the key link of its reliability.For GIS, when manufacturing complete in producer,
When preparing to transport scene to, generally require and carry out delivery test, to guarantee the integrity made.In delivery test
Crucial content of the test is various pressure tests, including industrial frequency withstand voltage test and impulse withstand voltage test.Due to entirety
The restriction of volume, GIS dispatch from the factory pressure test be one interval one interval carrying out, On-Site Testing is then
It is that GIS entirety is carried out.For pressure test of dispatching from the factory, it may happen that puncture in process of the test, and the most accurate
True determination breakdown point is then a committed step.
Multiple super in GIS shell patch currently for the many employings of determination carrying out breakdown point in GIS On-Site Testing
The effect of sonic sensor, utilizes the amplitude difference of different sensors to carry out the determination of puncture place.This method
Needing tens sensors, site layout project is complicated, and knot conflicting between multiple sensor often occurs
Really.And for delivery test, owing to being to test a GIS interval, this is accomplished by wanting its accuracy
Ask higher, and reduce the number of sensor to ensure that detection is efficiently as far as possible.
Summary of the invention
It is an object of the invention to provide a kind of GIS and be spaced the pressure test breakdown point localization method that dispatches from the factory, this location side
Method method based on double-current sensor, utilizes the time difference of detection signal to position, has required sensor
Number is few, the convenient advantage of accurate positioning.
To achieve these goals, the technical solution used in the present invention is:
A kind of GIS detects the pressure test breakdown point localization method that dispatches from the factory, and comprises the following steps:
(1) determining distance L of GIS interval head and end, the head and end at GIS interval uses respectively
Down conductor ground connection；
(2) head end at GIS interval arranges power frequency or impulse voltage generator, described power frequency or impact electricity
Pressure generator is connected by the head end of GIS tubular distance piece and GIS interval；
(3) on the head end at GIS interval and the down conductor of end, high frequency electric sensing it is socketed respectively
Device, described High Frequency Current Sensor is connected with high-speed oscilloscope respectively；
(4) open power frequency or impulse voltage generator and GIS is spaced pressure test of dispatching from the factory；Work as interval
When middle optional position punctures, the High Frequency Current Sensor of ondograph detection head and end flows through
Puncture produced high-frequency pulse current, utilize the signal that said two High Frequency Current Sensor detects
Time difference determine puncture place.
Wherein, the time difference utilizing the signal that said two High Frequency Current Sensor detects in step (4) is true
Determine puncture place method particularly includes:
If the distance of breakdown point distance head end sensor is x, then the distance of its distance tip sensor is L-x,
Puncture produced high-frequency pulse current signal to propagate in GIS with light velocity v, then can pass through described high deadbeat
The signal calculated current signal of two High Frequency Current Sensor that ripple device detects arrives said two high frequency electric
The time difference Δ t of sensor, then equation below is set up:
| Vt × v |=| L-2x |
Calculate the value of x according to above formula, obtain breakdown point position.
Preferably, the frequency band range of described High Frequency Current Sensor is 500kHz-30MHz, described high speed oscillography
The sample rate of device is 20GHz, bandwidth 10GHz.
The positioning principle of the present invention is: in the head and end down conductor socket high frequency electric sensing at GIS interval
Device, when during GIS is spaced, optional position punctures, can flow through in the High Frequency Current Sensor of head and end
Puncture produced high-frequency pulse current, utilize the time difference of two sensor detection signal to carry out puncture place
Determine.
The key point of the present invention is the head and end that transducer arrangements is spaced at GIS, utilizes different sensors to receive
The time difference of signal carries out breakdown point location.
The invention has the beneficial effects as follows: achieve the effective of puncture place dispatched from the factory in pressure test at GIS interval and determine
Position.The time difference utilizing detection signal positions, and has required number of probes few, and accurate positioning is convenient
Advantage.
Accompanying drawing explanation
Fig. 1 is the connection schematic diagram that the present invention positions the puncture place dispatched from the factory in pressure test in GIS interval；
In figure, 1, power frequency or impulse voltage generator, 2, GIS tubular distance piece, 3, disc insulator, 4,
Interval head end down conductor, 5, head end High Frequency Current Sensor, 6, space ends down conductor, 7,
End High Frequency Current Sensor, 8, high-speed oscilloscope.
Detailed description of the invention
The present invention will be further described below in conjunction with the accompanying drawings.
The connection schematic diagram of the present invention is as shown in Figure 1.First the distance of GIS interval head and end is determined
L, the head and end at GIS interval uses down conductor ground connection respectively；Head end at GIS interval arranges work
Frequency or impulse voltage generator, described power frequency or impulse voltage generator are spaced by GIS tubular distance piece and GIS
Head end be connected；The head end at GIS interval and the down conductor of end are socketed high frequency electric sensing respectively
Device, described High Frequency Current Sensor is connected with high-speed oscilloscope respectively；Open power frequency or impulse voltage generator pair
GIS is spaced the pressure test that carries out dispatching from the factory；When GIS interval punctures, can be at the ground connection high frequency of head and end
Produce current impulse on current sensor, the High Frequency Current Sensor of ondograph detection head and end flows through
Puncture produced high-frequency pulse current, utilize the signal that said two High Frequency Current Sensor detects time
Between difference determine puncture place.If the distance of breakdown point distance head end sensor is x, then apart from tip sensor
Distance is L-x, and current signal is propagated in GIS with light velocity v, then the two-way that can be detected by oscillograph
The signal of sensor calculates its time difference Δ t, and time difference computational methods can use cumlative energy method, Peak Intensity Method etc.
Existing method.Then equation below is set up:
| Vt × v |=| L-2x |
Then can calculate the value of x according to above formula, and then ask for breakdown point position.
Wherein the frequency band range of High Frequency Current Sensor is 500kHz-30MHz, and the sample rate of high-speed oscilloscope is
20GHz, bandwidth 10GHz.
The head end at head and end sensor GIS to be arranged in interval and end, it is ensured that puncture generation two sensings
Between device.
The ultimate principle of the present invention, principal character and advantage have more than been shown and described.The technical staff of the industry
It should be appreciated that the present invention is not restricted to the described embodiments, simply saying described in above-described embodiment and description
The principle of the bright present invention, without departing from the spirit and scope of the present invention, the present invention also has various change
And improvement, these changes and improvements both fall within scope of the claimed invention.Claimed model
Enclose and defined by appending claims and equivalent thereof.
Claims (3)
1. a GIS is spaced the pressure test breakdown point localization method that dispatches from the factory, it is characterised in that: include following step
Rapid:
(1) determining distance L of GIS interval head and end, the head and end at GIS interval uses respectively
Down conductor ground connection；
(2) head end at GIS interval arranges power frequency or impulse voltage generator, described power frequency or impact electricity
Pressure generator is connected by the head end of GIS tubular distance piece and GIS interval；
(3) on the head end at GIS interval and the down conductor of end, high frequency electric sensing it is socketed respectively
Device, described High Frequency Current Sensor is connected with high-speed oscilloscope respectively；
(4) open power frequency or impulse voltage generator and GIS is spaced pressure test of dispatching from the factory；Work as interval
When middle optional position punctures, the High Frequency Current Sensor of ondograph detection head and end flows through
Puncture produced high-frequency pulse current, utilize the signal that said two High Frequency Current Sensor detects
Time difference determine puncture place.
GIS the most according to claim 1 detects the pressure test breakdown point localization method that dispatches from the factory, its feature
It is: preferably, step (4) utilizes the time of the signal that said two High Frequency Current Sensor detects
Difference determines puncture place method particularly includes:
If the distance of breakdown point distance head end sensor is x, then the distance of its distance tip sensor is L-x,
Puncture produced high-frequency pulse current signal to propagate in GIS with light velocity v, then can pass through described high deadbeat
The signal calculated current signal of two High Frequency Current Sensor that ripple device detects arrives said two high frequency electric
The time difference Δ t of sensor, then equation below is set up:
| Vt × v |=| L-2x |
Calculate the value of x according to above formula, obtain breakdown point position.
GIS the most according to claim 1 detects the pressure test breakdown point localization method that dispatches from the factory, its feature
It is: the frequency band range of described High Frequency Current Sensor is 500kHz-30MHz, adopting of described high-speed oscilloscope
Sample rate is 20GHz, bandwidth 10GHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610260605.3A CN105974276A (en) | 2016-04-25 | 2016-04-25 | GIS interval delivery withstand voltage test breakdown point locating method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610260605.3A CN105974276A (en) | 2016-04-25 | 2016-04-25 | GIS interval delivery withstand voltage test breakdown point locating method |
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| CN201610260605.3A Pending CN105974276A (en) | 2016-04-25 | 2016-04-25 | GIS interval delivery withstand voltage test breakdown point locating method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646149A (en) * | 2016-10-20 | 2017-05-10 | 云南电网有限责任公司电力科学研究院 | Flashover fault location system and method for gas insulated substation |
| CN107037330A (en) * | 2016-11-21 | 2017-08-11 | 国网四川省电力公司电力科学研究院 | A kind of insulation fault independent positioning method |
| CN108802578A (en) * | 2018-05-04 | 2018-11-13 | 国网内蒙古东部电力有限公司电力科学研究院 | A kind of 550kV potting breakers full voltage optimization pressure test method |
| CN114217189A (en) * | 2021-12-30 | 2022-03-22 | 国网江苏省电力有限公司南通供电分公司 | GIL equipment fault positioning method adopting ultrahigh frequency transient current measurement |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646149A (en) * | 2016-10-20 | 2017-05-10 | 云南电网有限责任公司电力科学研究院 | Flashover fault location system and method for gas insulated substation |
| CN106646149B (en) * | 2016-10-20 | 2019-09-03 | 云南电网有限责任公司电力科学研究院 | A kind of the arcing fault positioning system and method for gas-insulating and fully-enclosed combined electrical apparatus |
| CN107037330A (en) * | 2016-11-21 | 2017-08-11 | 国网四川省电力公司电力科学研究院 | A kind of insulation fault independent positioning method |
| CN108802578A (en) * | 2018-05-04 | 2018-11-13 | 国网内蒙古东部电力有限公司电力科学研究院 | A kind of 550kV potting breakers full voltage optimization pressure test method |
| CN114217189A (en) * | 2021-12-30 | 2022-03-22 | 国网江苏省电力有限公司南通供电分公司 | GIL equipment fault positioning method adopting ultrahigh frequency transient current measurement |
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Application publication date: 20160928 |