CN112578243A - Method for evaluating internal defect discharge of GIS disconnecting link air chamber - Google Patents
Method for evaluating internal defect discharge of GIS disconnecting link air chamber Download PDFInfo
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- CN112578243A CN112578243A CN202011441199.3A CN202011441199A CN112578243A CN 112578243 A CN112578243 A CN 112578243A CN 202011441199 A CN202011441199 A CN 202011441199A CN 112578243 A CN112578243 A CN 112578243A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000007547 defect Effects 0.000 title claims abstract description 12
- 239000002923 metal particle Substances 0.000 claims abstract description 34
- 230000002776 aggregation Effects 0.000 claims abstract description 32
- 238000004220 aggregation Methods 0.000 claims abstract description 32
- 238000011156 evaluation Methods 0.000 claims abstract description 19
- 239000002245 particle Substances 0.000 claims description 8
- 238000012423 maintenance Methods 0.000 claims description 5
- 230000002950 deficient Effects 0.000 claims 5
- 238000001514 detection method Methods 0.000 description 9
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000004817 gas chromatography Methods 0.000 description 3
- 229910018503 SF6 Inorganic materials 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009421 internal insulation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
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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
- G01R31/1218—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 using optical methods; using charged particle, e.g. electron, beams or X-rays
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/10—Investigating individual particles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/10—Investigating individual particles
- G01N15/14—Optical investigation techniques, e.g. flow cytometry
-
- 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
-
- 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
- G01R31/1263—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 solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1281—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 solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of liquids or gases
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/10—Investigating individual particles
- G01N2015/1029—Particle size
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/10—Investigating individual particles
- G01N15/14—Optical investigation techniques, e.g. flow cytometry
- G01N2015/1493—Particle size
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a method for evaluating defect discharge in a GIS disconnecting link air chamber, which comprises the following steps: detecting the size of the metal particle aggregation inside the GIS disconnecting link air chamber by adopting a photoelectric sensor through the observation hole; adjusting the angle and the direction of the photoelectric sensor, and detecting the size of the metal particle aggregation inside the GIS disconnecting link air chamber for multiple times; evaluating whether the metal particles in the GIS disconnecting link air chamber can cause flashover discharge or not according to the size of the metal particle aggregation size, and obtaining an evaluation result; and setting the operation mode of the GIS disconnecting link air chamber according to the evaluation result. According to the embodiment of the invention, the method for evaluating whether the discharge inside the GIS disconnecting link gas chamber is caused or not is carried out according to the size of the metal particle aggregation inside the GIS disconnecting link gas chamber, so that early warning of the discharge inside the GIS disconnecting link gas chamber is realized, the accident rate is reduced, and the cost of a power grid is reduced.
Description
Technical Field
The invention relates to the technical field of electric power detection, in particular to a method for evaluating internal defect discharge of a GIS disconnecting link air chamber.
Background
In recent years, gas insulated metal enclosed switchgear (GIS) has the characteristics of small floor space, little influence from weather conditions, long service life, less maintenance work, compact device structure, convenient installation, suitability for areas with complex terrain and narrow terrain, and is widely used in the power industry. However, as the number of GIS substations increases, GIS equipment fails more and more. The GIS disconnecting link is used as a main moving part, and due to the frequent switching operation requirement, the movable contact and the static contact have friction, so that abrasion metal particles exist in the air chamber. The sizes of the metal particles deposited on the wall of the GIS knife switch air chamber and the basin-type insulator are in a submillimeter scale and even in a micrometer scale. When the metal particles move and gather on the surface of the insulator under the action of mechanical vibration, breakdown discharge occurs under the action of VFTO, and the GIS equipment is difficult to overhaul due to power failure at present. Therefore, there is an urgent need for a method for detecting and evaluating metal particles inside a GIS device to evaluate whether the metal particles will cause discharge inside a GIS switch gas chamber.
At present, a lot of discharge detection methods are used for a GIS disconnecting link gas chamber, and a partial discharge ultrasonic detection method and a gas chromatography detection method are commonly used. The local ultrasonic detection method mainly utilizes that when local discharge occurs in the GIS, gas is instantaneously heated and expanded to generate shock waves, and the abnormality of internal insulation defects is found by detecting the shock waves. The method only depends on the magnitude of the partial discharge amplitude, and the position of the discharge point and the severity of the discharge are difficult to determine. A gas chromatography detection method mainly utilizes SF (sulfur hexafluoride) generated after internal discharge of a GIS (gas insulated switchgear) disconnecting link6Decomposition occurs by detecting SF6Decomposition productsH2O、H2S、SO2And judging whether the GIS disconnecting link gas chamber discharges or not according to the content of the gas with the same components. In addition, the gas chromatography detection method and the partial discharge method do not directly detect parameters causing discharge factors, but detect ultrasonic waves and decomposition products generated by discharge, and are indirect, so that the sensitivity is not high. And the gas chamber can be used only when the inside of the GIS disconnecting link gas chamber is discharged, and early warning cannot be achieved.
Disclosure of Invention
The invention aims to at least solve the technical problems in the prior art and provides a method for evaluating the internal defect discharge of a GIS disconnecting link air chamber.
The embodiment of the invention provides a method for evaluating defect discharge in a GIS disconnecting link gas chamber, which comprises the following steps:
detecting the size of the metal particle aggregation inside the GIS disconnecting link air chamber by adopting a photoelectric sensor through the observation hole;
adjusting the angle and the direction of the photoelectric sensor, and detecting the size of the metal particle aggregation inside the GIS disconnecting link air chamber for multiple times;
evaluating whether the metal particles in the GIS disconnecting link air chamber can cause flashover discharge or not according to the size of the metal particle aggregation size, and obtaining an evaluation result;
and setting the operation mode of the GIS disconnecting link air chamber according to the evaluation result.
The method further comprises the following steps: and acquiring voltage parameters in the GIS disconnecting link air chamber.
The voltage parameter is 220kV or 110 kV.
The evaluation result is as follows: discharge is not generated, may be generated, and may be generated.
The non-discharge is: the aggregation size L of the particles corresponding to 220kV is less than 2mm, and the aggregation size L of the particles corresponding to 110kV is less than 5 mm;
a discharge may occur: l is more than or equal to 2mm and less than or equal to 5mm corresponding to 220kV, and L is more than or equal to 5mm and less than or equal to 8mm corresponding to 110 kV;
a discharge will occur: l is more than 5mm corresponding to 220kV, and L is more than 8mm corresponding to 110 kV.
Whether discharge occurs in the GIS disconnecting link air chamber is evaluated by detecting the maximum value of the metal particle aggregation size in the GIS disconnecting link air chamber according to the multiple angle adjustment and direction adjustment of the photoelectric sensor.
The setting of the operation mode of the GIS disconnecting link air chamber according to the evaluation result comprises the following steps:
the operation mode without discharge is allowed;
the operation mode aiming at the possible discharge is supervision operation;
the operation mode aiming at generating discharge is power failure maintenance.
Compared with the prior art, the method for evaluating whether discharging inside the GIS disconnecting link air chamber is caused or not is achieved through the size of the metal particle aggregation inside the GIS disconnecting link air chamber, early warning of discharging of the GIS disconnecting link air chamber is achieved, the accident rate is reduced, and the power grid cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a method for evaluating defect discharge inside a GIS switch gas chamber in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Fig. 1 shows a flowchart of a method for evaluating defect discharge inside a GIS switch gas chamber in an embodiment of the present invention, which specifically includes:
s1: detecting the size of the metal particle aggregation inside the GIS disconnecting link air chamber by adopting a photoelectric sensor through the observation hole;
s2: adjusting the angle and the direction of the photoelectric sensor, and detecting the size of the metal particle aggregation inside the GIS disconnecting link air chamber for multiple times;
s3: evaluating whether the metal particles in the GIS disconnecting link air chamber can cause flashover discharge or not according to the size of the metal particle aggregation size, and obtaining an evaluation result;
s4: and setting the operation mode of the GIS disconnecting link air chamber according to the evaluation result.
Here also includes: and acquiring voltage parameters in the GIS disconnecting link air chamber.
The voltage parameter is 220kV, or 110 kV.
The evaluation results were: discharge is not generated, may be generated, and may be generated.
This does not generate discharge: the aggregation size L of the particles corresponding to 220kV is less than 2mm, and the aggregation size L of the particles corresponding to 110kV is less than 5 mm;
a discharge may occur: l is more than or equal to 2mm and less than or equal to 5mm corresponding to 220kV, and L is more than or equal to 5mm and less than or equal to 8mm corresponding to 110 kV;
a discharge will occur: l is more than 5mm corresponding to 220kV, and L is more than 8mm corresponding to 110 kV.
Whether discharge occurs in the GIS disconnecting link air chamber is evaluated by detecting the maximum value of the metal particle aggregation size in the GIS disconnecting link air chamber according to the multiple angle adjustment and direction adjustment of the photoelectric sensor.
The setting of the operation mode of the GIS disconnecting link air chamber according to the evaluation result comprises the following steps:
the operation mode without discharge is allowed;
the operation mode aiming at the possible discharge is supervision operation;
the operation mode aiming at generating discharge is power failure maintenance.
According to the embodiment of the invention, the method for evaluating whether the discharge inside the GIS disconnecting link gas chamber is caused or not is carried out according to the size of the metal particle aggregation inside the GIS disconnecting link gas chamber, so that early warning of the discharge inside the GIS disconnecting link gas chamber is realized, the accident rate is reduced, and the cost of a power grid is reduced.
Example two
Fig. 1 shows a flowchart of a method for evaluating defect discharge inside a GIS switch gas chamber in an embodiment of the present invention, which specifically includes the following steps:
s1: detecting the size of the metal particle aggregation inside the GIS disconnecting link air chamber by adopting a photoelectric sensor through the observation hole;
specifically, the voltage parameter in the GIS switch air chamber needs to be acquired, and the voltage parameter may be 220kV, 110kV and the like.
S2: adjusting the angle and the direction of the photoelectric sensor, and detecting the size of the metal particle aggregation inside the GIS disconnecting link air chamber for multiple times;
here, the detection range interval of the particle aggregation size L corresponding to 220kV is set as follows: l is less than 2mm, L is more than or equal to 2mm and less than or equal to 5mm, and L is more than 5 mm;
here, the detection range interval of the particle aggregation size L corresponding to 110kV is set as follows: l is less than 5mm, L is more than or equal to 5mm and less than or equal to 8mm, and L is more than 8 mm.
S3: evaluating whether the metal particles in the GIS disconnecting link air chamber can cause flashover discharge or not according to the size of the metal particle aggregation size, and obtaining an evaluation result;
specifically, the evaluation results here are: will not produce discharge, may produce discharge, will produce discharge, its area that corresponds to is:
no discharge is generated: l corresponding to 220kV is less than 2mm, and L corresponding to 110kV is less than 5 mm;
a discharge may occur: l is more than or equal to 2mm and less than or equal to 5mm corresponding to 220kV, and L is more than or equal to 5mm and less than or equal to 8mm corresponding to 110 kV;
a discharge will occur: l is more than 5mm corresponding to 220kV, and L is more than 8mm corresponding to 110 kV.
It should be noted that, here, the evaluation of whether the inside of the GIS switch air chamber will discharge is performed by detecting the maximum value of the metal particle aggregation size inside the GIS switch air chamber according to the multiple angle adjustment and direction adjustment of the photoelectric sensor.
S4: and setting the operation mode of the GIS disconnecting link air chamber according to the evaluation result.
Here, the operation mode in which no discharge is generated is the permitted operation, the operation mode in which discharge is likely to be generated is the supervised operation, and the operation mode in which discharge is generated is the blackout maintenance, and the corresponding operation modes are shown in table 1.
TABLE 1 GIS disconnecting link air chamber internal metal particle aggregation size reference value
According to the embodiment of the invention, the method for evaluating whether the discharge inside the GIS disconnecting link gas chamber is caused or not is carried out according to the size of the metal particle aggregation inside the GIS disconnecting link gas chamber, so that early warning of the discharge inside the GIS disconnecting link gas chamber is realized, the accident rate is reduced, and the cost of a power grid is reduced.
The above embodiments of the present invention are described in detail, and the principle and the implementation manner of the present invention should be described herein by using specific embodiments, and the above description of the embodiments is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (7)
1. A method for evaluating defect discharge inside a GIS knife switch gas chamber is characterized by comprising the following steps:
detecting the size of the metal particle aggregation inside the GIS disconnecting link air chamber by adopting a photoelectric sensor through the observation hole;
adjusting the angle and the direction of the photoelectric sensor, and detecting the size of the metal particle aggregation inside the GIS disconnecting link air chamber for multiple times;
evaluating whether the metal particles in the GIS disconnecting link air chamber can cause flashover discharge or not according to the size of the metal particle aggregation size, and obtaining an evaluation result;
and setting the operation mode of the GIS disconnecting link air chamber according to the evaluation result.
2. The method for evaluating the defective discharge inside the GIS knife switch gas cell as claimed in claim 1, wherein the method further comprises: and acquiring voltage parameters in the GIS disconnecting link air chamber.
3. The method for evaluating the defective discharge inside the GIS knife switch gas chamber as claimed in claim 2, wherein the voltage parameter is 220kV or 110 kV.
4. The method for evaluating the defective discharge inside the GIS disconnecting link gas chamber according to claim 3, wherein the evaluation result is that: discharge is not generated, may be generated, and may be generated.
5. The method for evaluating the defective discharge inside the GIS disconnecting link gas chamber according to claim 4, wherein the discharge is not generated: the aggregation size L of the particles corresponding to 220kV is less than 2mm, and the aggregation size L of the particles corresponding to 110kV is less than 5 mm;
a discharge may occur: l is more than or equal to 2mm and less than or equal to 5mm corresponding to 220kV, and L is more than or equal to 5mm and less than or equal to 8mm corresponding to 110 kV;
a discharge will occur: l is more than 5mm corresponding to 220kV, and L is more than 8mm corresponding to 110 kV.
6. The method for evaluating the defective discharge inside the GIS disconnecting link gas chamber according to claim 5, wherein the evaluation of whether the discharge inside the GIS disconnecting link gas chamber occurs is judged by detecting the maximum value of the metal particle aggregation size inside the GIS disconnecting link gas chamber according to the angle and direction adjusted by the photoelectric sensor for a plurality of times.
7. The method for evaluating the internal defect discharge of the GIS disconnecting link gas chamber according to the claim 6, wherein the setting of the operation mode of the GIS disconnecting link gas chamber according to the evaluation result comprises the following steps:
the operation mode without discharge is allowed;
the operation mode aiming at the possible discharge is supervision operation;
the operation mode aiming at generating discharge is power failure maintenance.
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| CN202011441199.3A CN112578243A (en) | 2020-12-08 | 2020-12-08 | Method for evaluating internal defect discharge of GIS disconnecting link air chamber |
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| CN202011441199.3A CN112578243A (en) | 2020-12-08 | 2020-12-08 | Method for evaluating internal defect discharge of GIS disconnecting link air chamber |
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Application publication date: 20210330 |