CN114690008A - Device and method for observing discharge and surface flashover of GIS insulator induced by particles - Google Patents
Device and method for observing discharge and surface flashover of GIS insulator induced by particles Download PDFInfo
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- CN114690008A CN114690008A CN202210603054.1A CN202210603054A CN114690008A CN 114690008 A CN114690008 A CN 114690008A CN 202210603054 A CN202210603054 A CN 202210603054A CN 114690008 A CN114690008 A CN 114690008A
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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
- G01R31/1245—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 line insulators or spacers, e.g. ceramic overhead line cap insulators; of insulators in HV bushings
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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
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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
- G01R31/16—Construction of testing vessels; Electrodes therefor
Abstract
The invention relates to a device and a method for observing particle-induced GIS insulator discharge and surface flashover, which are technically characterized by comprising the following steps: the device comprises a metal cavity, a post insulator flashover platform, an optical detection device, a heating device, a high-speed camera device and a high-voltage power supply device; the post insulator flashover platform is installed in the metal cavity, the heating device is installed on the metal cavity and used for heating the metal cavity, the high-voltage power supply device is connected with the post insulator flashover platform in the metal cavity and applies high voltage to the post insulator flashover platform, the metal cavity is provided with a discharge and creeping flashover observation window, and the optical detection device and the high-speed camera device are installed on the outer side of the discharge and creeping flashover observation window and are respectively used for detecting optical signals and shooting flashover. The invention has reasonable design, provides an effective test platform for researching the discharge and flashover characteristics of the GIS post insulator induced by particles under the action of electrothermal coupling, and has the characteristics of accurate measurement, simple operation, easy installation and the like.
Description
Technical Field
The invention belongs to the technical field of electrical insulation, and particularly relates to a device and a method for observing particle-induced GIS insulator discharge and surface flashover.
Background
A Gas Insulated Switchgear (GIS) system has the advantages of small floor space, high operation reliability, long maintenance period, convenience in transportation and installation and the like, and is increasingly widely applied at home and abroad. GIS operation experience shows that the insulation characteristic of an air-solid interface becomes the weakest link and the most critical factor of the overall insulation of the system, and the GIS safe and stable operation of internal or surface flashover discharge caused by wetting, dirt and cracks of components such as a basin-type insulator, a supporting insulator and the like is a great challenge.
Post insulators are widely used in GIS systems. The structure of the post insulator is different from that of the basin-type insulator, and the electric field distribution is also different, so that the discharge and flashover characteristics of the post insulator are greatly different. In the actual operation process, the GIS conductor carries current and generates heat, a temperature gradient field can be formed inside the pipeline, and the temperature gradient causes electric field distortion. The temperature also affects the electrical parameters of the insulator, further changing the insulating properties of the insulator. Under the interaction of an electric field and a temperature field, the insulator is easy to discharge so as to develop surface flashover.
Researchers can study the insulation characteristics of the insulator through a GIS device in an SF6 gas environment. At present, a lot of researches are carried out on the basin-type insulator, for example, forest et al invent a flashover characteristic and experimental device of the insulator along the surface under an electric heating composite field, and the flashover characteristic and experimental device are used for observing the flashover of the basin-type insulator along the surface; the Li Wei nations and the like have invented a three-post insulator fault simulation experiment platform and a simulation method for simulating the insulation fault and the heating fault of a three-post insulator. However, at present, few devices are used for observing the post insulator discharge induced by the particles, the post insulator flashover caused by the particles is observed simply, the discharge phenomenon before flashover is not observed comprehensively and accurately, and the mechanism analysis of the post insulator discharge and the surface flashover caused by the particles is difficult to support.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a device and a method for observing particle-induced GIS insulator discharge and surface flashover, which comprehensively consider the combined action of an electric field and a temperature field and adopt an optical method to comprehensively and accurately observe the discharge phenomenon of a GIS post insulator.
The invention solves the technical problem by adopting the following technical scheme:
a particle-induced GIS insulator discharge and surface flashover observation device comprises a metal cavity, a post insulator flashover platform, an optical detection device, a heating device, a high-speed camera device and a high-voltage power supply device; the utility model discloses a high-voltage power supply device, including post insulator flashover platform, heating device, high-voltage power supply device and metal cavity, post insulator flashover platform installs in the metal cavity, heating device installs and is used for heating the metal cavity on the metal cavity, high-voltage power supply device is connected with the post insulator flashover platform in the metal cavity and applys the high pressure for it, be equipped with on the metal cavity and discharge and edgewise flashover observation window, optical detection device, high-speed camera device install discharge and edgewise flashover observation window's the outside, are used for detecting optical signal and flashover respectively to shoot.
Furthermore, two basin-type insulators, a high-voltage guide rod and a support insulator flashover platform are installed in the metal cavity, the metal cavity is divided into three chambers by the two basin-type insulators, one end of the high-voltage guide rod is connected with a high-voltage power supply device, and the other end of the high-voltage guide rod penetrates through the second chamber to be connected with the support insulator flashover platform installed in the third chamber; the post insulator flashover platform is fixedly arranged on the inner wall of the metal cavity through a supporting device; and a discharge and surface flashover observation window is arranged at one end of the third chamber far away from the second chamber.
Further, the post insulator flashover platform comprises a metal shell, a post insulator and a hollow metal guide rod; the hollow metal guide rod is arranged in the metal shell, one side of the post insulator is connected with the metal shell, the other side of the post insulator is connected with the outer side face of the hollow metal guide rod, and metal particles are adhered to the surface of the post insulator.
Further, the center of the post insulator and the center of the discharge and creeping flashover observation window are on the same horizontal line.
Further, the surface-adhered metal particles of the pillar insulator are aluminum particles.
Further, an air pressure gauge and an air valve are further mounted at the upper part of the third chamber, air pressure in the metal cavity is displayed through the air pressure gauge, and SF6/N2 mixed gas is charged into and discharged from the third chamber through the air valve.
Further, the heating device comprises an oil storage tank, a heater, a temperature sensor, an oil pump, a first oil guide pipe and a second oil guide pipe; the oil storage tank is filled with insulating oil, and the heater is arranged in the middle of the oil storage tank; the temperature sensor is arranged above the oil outlet and used for measuring the oil temperature entering the first oil guide pipe; the first oil guide pipe is used for connecting the oil storage tank with the hollow metal guide rod, the insulating plate is arranged in the middle of the hollow metal guide rod, and the second oil guide pipe is used for connecting the oil pump with the hollow metal guide rod.
Furthermore, the first oil guide pipe is connected with the oil storage tank and the hollow metal guide rod through a flange above the third chamber, and the second oil guide pipe is connected with the oil pump and the hollow metal guide rod through a flange below the third chamber.
Further, the optical detection device comprises a photomultiplier detector, a data acquisition device and a computer; the photomultiplier detector is arranged outside the discharge and creeping flashover observation window, when weak light signals emitted by particle discharge are detected, the collected data are transmitted to a computer through a data acquisition device, and the computer displays the development of discharge in time and the change condition of the state of the discharge.
Further, the high-speed camera device comprises a high-speed camera and a high-speed camera support, the high-speed camera is installed on the outer side of the discharging and surface flashover observation window through the high-speed camera support, and when the post insulator is subjected to surface flashover, the high-speed camera shoots flashover through the discharging and surface flashover observation window and transmits shooting data to the computer.
Further, the high-voltage power supply device comprises a high-voltage power supply and a protective resistor, the high-voltage power supply is connected to a high-voltage bushing through the protective resistor, the high-voltage bushing is mounted on the metal cavity through a flange, and the high-voltage power supply applies high voltage to the support insulator flashover platform through the protective resistor, the high-voltage bushing and the high-voltage guide rod.
A particle-induced GIS insulator discharge and surface flashover observation method is characterized in that a particle-induced GIS insulator discharge and surface flashover observation device is used for carrying out a pretreatment test and a pressurization test:
the pretreatment test comprises the following steps:
vacuumizing the metal cavity, and filling SF into the metal cavity6/N2Mixing the gas;
heating the metal cavity to reach a preset temperature;
the compression test comprises:
the high-voltage power supply device applies voltage to the post insulator until the post insulator flashover;
the optical detection device detects the optical signal and transmits the optical signal to the computer; the high-speed camera device shoots the flashover and transmits the flashover to the computer.
Further, the high-voltage power supply device applies a voltage to the post insulator by a step voltage application method.
Further, the volume ratio of sulfur hexafluoride to nitrogen in the SF6/N2 mixed gas is 2: 8.
the invention has the advantages and positive effects that:
the invention has reasonable design, fully considers the influence of metal particles on the flashover characteristic of the GIS post insulator, adopts the heating device and the optical detection device to carry out discharge and surface flashover tests on the post insulator in the metal cavity, can simulate the running condition of the post insulator under the actual condition, realizes the function of comprehensively and accurately measuring the flashover process of the post insulator, can be widely used for the test of the flashover of the post insulator under the action of electrothermal coupling, and provides an effective test platform for researching the discharge and flashover characteristic of the GIS post insulator induced by the particles under the action of electrothermal coupling.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a post insulator flashover platform of the present invention;
fig. 3 is a right side view of fig. 2.
In the figure, 1-metal cavity; 2-a basin insulator; 3-a first chamber; 4-a second chamber; 5-a third chamber; 6-high pressure guide rod; 7-high voltage bushing; 8-a high voltage power supply; 9-protective resistance; 10-a metal housing; 11-a support means; 12-discharge and creeping flashover observation window; 13-barometer; 14-a gas valve; 15-photomultiplier detector; 16-a light shield; 17-a data acquisition device; 18-a computer; 19-an oil storage tank; 20-a heater; 21-a temperature sensor; 22-an oil pump; 23-a first oil conduit; 24-a second oil conduit; 25-a hollow metal guide rod; 26-post insulators; 27-a metal insert; 28-metal particles; 29-high speed camera; 30-high speed camera support.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The invention provides a device for observing the discharge phenomenon of a GIS insulator caused by particles and the creeping flashover along the surface, aiming at the problem that the discharge phenomenon before the flashover of a post insulator caused by metal particles is lacked in the prior art, and the device comprises a metal cavity 1, a post insulator flashover platform, an optical detection device, a heating device, a high-speed camera device and a high-voltage power supply device, wherein the post insulator flashover platform is shown in figure 1. The post insulator flashover platform is installed in metal cavity 1, heating device installs and is used for heating metal cavity 1 on metal cavity 1, high voltage power supply unit is connected with the post insulator flashover platform in the metal cavity 1 and applys the high pressure for it, and metal cavity 1 is equipped with discharge and edgewise flashover observation window 12, optical detection device, high-speed camera device installation discharge and the outer side of edgewise flashover observation window 12 are used for detecting optical signal and flashover respectively and take. The device comprehensively considers the combined action of the electric field and the temperature field, and realizes the function of comprehensively and accurately observing the discharge phenomenon of the GIS post insulator by adopting an optical method.
In the invention, two basin-type insulators 2, a high-voltage guide rod 6 and a post insulator flashover platform are arranged in a metal cavity 1, the metal cavity 1 is divided into three chambers by the two basin-type insulators 2, namely a first chamber 3, a second chamber 4 and a third chamber 5, one end of the high-voltage guide rod 6 is connected with a high-voltage power supply device, and the other end of the high-voltage guide rod 6 penetrates through the second chamber 4 to be connected with the post insulator flashover platform arranged in the third chamber 5; the post insulator flashover platform is fixedly arranged on the inner wall of the metal cavity 1 through a supporting device; a discharge and creeping-flashover observation window 12 is installed at the end of the third chamber 5 remote from the second chamber.
In the invention, the metal cavity 1 is a closed cavity made of stainless steel, and the metal cavity 1 can bear the air pressure of 0.6Mpa at mostCharging into SF6/N2And the mixed gas is used for simulating the gas environment in the GIS.
In order to realize the air pressure display function in the metal cavity 1 and fill SF into the metal cavity6/N2And a gas pressure meter 13 and a gas valve 14 are also arranged on the metal cavity 1 for mixing gas. The barometer 13 and the air valve 14 are both arranged on the third chamber 5, the air pressure in the metal cavity 1 can be displayed through the barometer 13, and SF can be charged and discharged into and from the third chamber through the air valve 146/N2And (4) mixing the gases. For the convenience of observation, the barometer 13 is a digital barometer.
The high-voltage guide rod 6 in the metal cavity 1 realizes the function of connecting the high-voltage power supply device with the post insulator flashover platform. This high-voltage guide rod 6 is installed in first cavity 3, second cavity 4, third cavity 5, and the one end of high-voltage guide rod 6 is connected with high voltage power supply unit through high-voltage bushing 7 in the first cavity 3 outside, and this high-voltage bushing 7 passes through the flange mounting on metal cavity 1, and the other end of high-voltage guide rod 6 is connected with the post insulator flashover platform of third cavity 5 to load the voltage that high voltage power supply unit provided on the post insulator.
In the present invention, the post insulator flashover platform comprises a metal housing 10, a post insulator 26 and a hollow metal guide rod 25, as shown in fig. 2 and 3, the hollow metal guide rod 25 is installed in the metal housing 10, one side of the post insulator 26 is connected to the metal housing 10, the other side of the post insulator 26 is connected to the outer side of the hollow metal guide rod 25, and metal particles 28 are adhered to the surface of the post insulator 26.
In the support insulator flashover platform, a metal shell 10 is tightly connected with a shell of a metal cavity 1 through a supporting device 11, the supporting device 11 is fixedly arranged on the inner wall of the metal cavity 1, and the metal shell 10 can be arranged in the metal cavity 1 through the mounting structure.
In the post insulator flashover platform, the metal housing 10 is a cylindrical metal housing made of an aluminum alloy material, and has a radius of 108mm and a wall thickness of 8 mm. The radius of the hollow metal guide rod 25 is 30mm, and the hollow metal guide rod 25 and the metal shell 10 are in a coaxial cylindrical structure.
In the post insulator flashover platform, the bottom of a post insulator 26 is mounted on the inner wall of the metal shell 10 through a metal insert 27, and the top end of the post insulator 26 is arc-shaped and is tightly connected with the arc-shaped outer surface of the hollow metal guide rod 25.
In the post insulator flashover platform, the post insulator 26 is made of epoxy resin, and the length of the post insulator 26 is 70 mm.
In the post insulator flashover platform, the metal particles 28 adhered to the surface of the post insulator 26 are aluminum particles, because metal particles are generated due to the abrasion of the electrodes in the production, assembly, transportation and operation processes of the actual GIS, and the material of the electrodes is mainly aluminum material, so the metal particles generated in the actual GIS can be accurately simulated by adopting the aluminum particles.
The metal particles 28 are adhered to the middle part of the surface of the post insulator 26; on one hand, the attachment position of actual particles in GIS operation can be simulated, and on the other hand, the particles are arranged in the middle part, so that development traces of flashover towards the high-voltage electrode and the ground electrode are observed conveniently.
In the post insulator flashover platform, the center of the post insulator 26 and the center of the discharge and creeping flashover observation window 12 are on the same horizontal line, which is convenient for the accurate observation of an optical detection device and a high-speed camera device.
In the post insulator flashover platform, the discharge and creeping flashover observation window 12 consists of a quartz glass window piece, the thickness of which is 25mm, the diameter of which is 140mm, and which is mounted at the outer end of the third chamber 5 by a flange cover plate and an O-ring seal coil. The discharging and creeping flashover observation window 12 and the post insulator 26 in the metal cavity 1 are arranged on the same horizontal line, and the flashover state of the post insulator 26 can be accurately observed through the observation window, so that the possibility is provided for optical detection and shooting of an optical detection device and a high-speed camera device.
In the present invention, the heating device can realize the heating function of the metal cavity 1, and the heating device includes an oil storage tank 19, a heater 20, a temperature sensor 21, an oil pump 22, a first oil conduit 23 and a second oil conduit 24. The oil storage tank 19 is filled with insulating oil, and the heater 20 is arranged in the middle of the oil storage tank; the temperature sensor 21 is arranged above the oil outlet and used for measuring the temperature of oil entering the first oil guide pipe 23; the first oil guide pipe 23 connects the oil storage tank 19 with the hollow metal guide rod 25, an insulating plate is arranged in the middle of the hollow metal guide rod 25, and the second oil guide pipe 24 connects the oil pump 22 with the hollow metal guide rod 25.
In the above heating device, the specific installation manner of the first oil guide pipe 23 and the second oil guide pipe 24 is as follows: the first oil conduit 23 connects the oil reservoir 19 with the hollow metal guide rod 25 through a flange above the third chamber 5, and the second oil conduit 24 connects the oil pump 22 with the hollow metal guide rod 25 through a flange below the third chamber 5.
In the above heating device, the heater 20 is constituted by a heat generating wire. The reservoir 19 is made of polycarbonate PC plastic and can withstand temperatures up to 120 c. The first oil guide pipe 23 and the second oil guide pipe 24 are both made of polybutylene PB plastic, the radius is 10mm, the thickness is 2mm, and the heat-resistant oil guide pipe has good flexibility and heat resistance. During the test, the temperature of the insulating oil is adjusted to 60-80 ℃ through a heating device, and is the same as the temperature during the actual operation.
The working principle of the heating device is as follows: an oil circulation loop is formed among the hollow metal guide rod 25, the oil storage tank 19 and the oil pump 22 through oil bath circulation, an insulating plate is arranged inside the hollow metal guide rod 25, high-temperature heat conduction oil can conveniently flow upwards after entering the hollow metal guide rod 25 and then flow downwards after flowing to the top, and the heat exchange area between the heat conduction oil and the hollow metal guide rod 25 is increased. The heating power of the heating wire in the oil reservoir 19 was 1000W. The heated high-temperature heat conduction oil flows into the hollow metal guide rod 25 through the oil guide pipe under the drive of the oil pump 22, flows out of the hollow metal guide rod 25 through the high-temperature oil pump 22, and is sent back to the oil storage tank. The temperature of the high-pressure guide rod is raised through heat exchange between the high-temperature heat conduction oil and the hollow metal guide rod 25.
In the invention, the optical detection device adopts a PMT (photomultiplier tube) optical detection device, and realizes the optical detection function of the support insulator flashover platform. The optical detection device comprises a photomultiplier detector 15, a light shield 16, a data acquisition device 17 and a computer 18. The photomultiplier detector 15 is installed outside the discharge and creeping flashover observation window 12, and when a weak light signal emitted by particle discharge is detected, the collected data is transmitted to the computer 18 through the data collecting device 17, and the computer displays the development of the discharge in time and the change condition of the state of the discharge.
In the optical detection device, the light shield 16 is further installed outside the photomultiplier tube detector 15 to shield light, so that interference of external light signals can be effectively avoided.
In the optical detection device, the spectral range measurable by the photomultiplier detector 15 is 300nm to 600nm, which meets the requirement of insulator partial discharge weak luminescence detection. During the test, the photomultiplier tube detector 15 continuously detects the optical signal and stores all data until the insulator flashover occurs.
In the invention, the high-speed camera device realizes the flashover shooting function of the support insulator flashover platform, the high-speed camera device comprises a high-speed camera 29 and a high-speed camera support 30, the high-speed camera 29 is installed on the outer side of the discharging and creeping flashover observation window 12 through the high-speed camera support 30, when the support insulator has the creeping flashover along the surface, the high-speed camera 29 shoots the flashover through the discharging and creeping flashover observation window, and after the shooting is finished, the high-speed camera 29 transmits the shooting data to the computer 18.
In the high-speed imaging apparatus, the light shield 16 is further installed outside the high-speed camera 29 to shield light, so that interference of external light signals to the high-speed camera 29 can be effectively avoided.
In the invention, the high-voltage power supply device comprises a high-voltage power supply 8 and a protection resistor 9, the high-voltage power supply 8 is connected to a high-voltage bushing 7 through the protection resistor 9, and the high-voltage power supply 8 applies a voltage up to 300kV to a post insulator flashover platform through the protection resistor 9, the high-voltage bushing 7 and a high-voltage guide rod 6.
The particle-induced GIS insulator discharge and surface flashover observation device fully considers the influence of metal particles on insulator flashover characteristics, can accurately simulate the operation condition of the post insulator under the actual condition, and realizes the function of comprehensively and accurately measuring the discharge process of the flashover of the post insulator.
The invention also provides a method for observing the discharge and the creeping flashover of the particle-induced GIS insulator, which uses a device for observing the discharge and the creeping flashover of the particle-induced GIS insulator to carry out the following pretreatment test and pressurization test:
the pretreatment test comprises the following steps:
vacuumizing the metal cavity, and filling SF into the metal cavity6/N2Mixing the gas;
heating the metal cavity to reach a preset temperature;
the compression test comprises:
the high-voltage power supply device applies voltage to the post insulator until the post insulator flashover;
the optical detection device detects the optical signal and transmits the optical signal to the computer; the high-speed camera device shoots the flashover and transmits the flashover to the computer.
In the pretreatment test, SF gas was introduced into the metal chamber6/N2The volume ratio of sulfur hexafluoride to nitrogen in the mixed gas is 2: 8.
in the process of vacuumizing the metal cavity, when the metal cavity is vacuumized, SF is required to be filled into the metal cavity6/N2And the mixed gas is used for simulating the gas environment in the GIS, and when the air pressure in the metal cavity reaches 0.5Mpa, the inflation is stopped.
When the metal cavity is heated, the heating device heats the insulating oil in the heating device, and when the temperature of the insulating oil reaches a preset temperature (for example, 60-80 ℃), the heating is stopped.
In the pressurization test, the high-voltage power supply device applies voltage to the post insulator by adopting a step pressurization method until the insulator flashover.
In the pressurizing process, the optical detection device continuously detects optical signals and transmits the detected optical signals to the computer; the high-speed camera device shoots flashover, records a flashover starting position and a flashover path and then transmits the flashover starting position and the flashover path to the computer.
Before the test is carried out, the observation method needs to carry out test preparation work, such as: the post insulator for testing is selected, the post insulator is wiped by alcohol, the surface of the post insulator is ensured to be free of pollution, and the positions of the high-speed camera device and the optical detection device are adjusted to ensure that the post insulator meets the requirements of camera shooting and optical detection.
After the test, the observation method needs to finish the treatment work, and comprises the following steps: discharging treatment work after the discharging and flashover detection is finished; release of SF in sealed metal cavities6/N2Mixing the gas; and opening the sealed metal cavity, wiping the surfaces of the insulator and the high-voltage guide rod by using absolute ethyl alcohol, treating by using an ion fan, and cleaning the interior of the metal cavity to prepare for the next test.
It should be emphasized that the embodiments described herein are illustrative rather than restrictive, and thus the present invention is not limited to the embodiments described in the detailed description, but also includes other embodiments that can be derived from the technical solutions of the present invention by those skilled in the art.
Claims (14)
1. The utility model provides a particle induces GIS insulator discharge and creeping flashover observation device which characterized in that: the device comprises a metal cavity, a post insulator flashover platform, an optical detection device, a heating device, a high-speed camera device and a high-voltage power supply device; the utility model discloses a high-voltage power supply device, including post insulator flashover platform, heating device, high-voltage power supply device and metal cavity, post insulator flashover platform installs in the metal cavity, heating device installs and is used for heating the metal cavity on the metal cavity, high-voltage power supply device is connected with the post insulator flashover platform in the metal cavity and applys the high pressure for it, be equipped with on the metal cavity and discharge and edgewise flashover observation window, optical detection device, high-speed camera device install discharge and edgewise flashover observation window's the outside, are used for detecting optical signal and flashover respectively to shoot.
2. The device for observing particle-induced GIS insulator discharge and surface flashover according to claim 1, wherein: two basin-type insulators, a high-voltage guide rod and a post insulator flashover platform are arranged in the metal cavity, the metal cavity is divided into three chambers by the two basin-type insulators, one end of the high-voltage guide rod is connected with a high-voltage power supply device, and the other end of the high-voltage guide rod penetrates through the second chamber to be connected with the post insulator flashover platform arranged in the third chamber; the post insulator flashover platform is fixedly arranged on the inner wall of the metal cavity through a supporting device; and a discharge and surface flashover observation window is arranged at one end of the third chamber far away from the second chamber.
3. The device for observing particle-induced GIS insulator discharge and surface flashover according to claim 2, wherein: the post insulator flashover platform comprises a metal shell, a post insulator and a hollow metal guide rod; the hollow metal guide rod is arranged in the metal shell, one side of the post insulator is connected with the metal shell, the other side of the post insulator is connected with the outer side face of the hollow metal guide rod, and metal particles are adhered to the surface of the post insulator.
4. The device for observing particle-induced GIS insulator discharge and surface flashover according to claim 3, wherein: the center of the post insulator and the center of the discharge and creeping flashover observation window are on the same horizontal line.
5. The device for observing particle-induced GIS insulator discharge and surface flashover according to claim 3 or 4, wherein: the metal particles adhered to the surface of the pillar insulator are aluminum particles.
6. The device for observing particle-induced GIS insulator discharge and surface flashover according to claim 2, wherein: an air pressure gauge and an air valve are further mounted on the upper portion of the third chamber, air pressure in the metal cavity is displayed through the air pressure gauge, and SF is charged and discharged into the third chamber through the air valve6/N2And (4) mixing the gases.
7. The device for observing particle-induced GIS insulator discharge and surface flashover according to claim 1, wherein: the heating device comprises an oil storage tank, a heater, a temperature sensor, an oil pump, a first oil guide pipe and a second oil guide pipe; the oil storage tank is filled with insulating oil, and the heater is arranged in the middle of the oil storage tank; the temperature sensor is arranged above the oil outlet and used for measuring the temperature of oil entering the first oil guide pipe; the first oil guide pipe is used for connecting the oil storage tank with the hollow metal guide rod, the insulating plate is arranged in the middle of the hollow metal guide rod, and the second oil guide pipe is used for connecting the oil pump with the hollow metal guide rod.
8. The particle-induced GIS insulator discharge and creeping flashover observation device according to claim 7, wherein: the first oil guide pipe is connected with the oil storage tank and the hollow metal guide rod through a flange above the third chamber, and the second oil guide pipe is connected with the oil pump and the hollow metal guide rod through a flange below the third chamber.
9. The device for observing particle-induced GIS insulator discharge and surface flashover according to claim 1, wherein: the optical detection device comprises a photomultiplier detector, a data acquisition device and a computer; the photomultiplier detector is arranged outside the discharge and creeping flashover observation window, when weak light signals emitted by particle discharge are detected, the collected data are transmitted to a computer through a data acquisition device, and the computer displays the development of discharge in time and the change condition of the state of the discharge.
10. The particle-induced GIS insulator discharge and creeping flashover observation device according to claim 1, wherein: the high-speed camera comprises a high-speed camera and a high-speed camera support, the high-speed camera is installed on the outer side of the discharge and surface flashover observation window through the high-speed camera support, and when the post insulator generates surface flashover, the high-speed camera shoots flashover through the discharge and surface flashover observation window and transmits shooting data to the computer.
11. The device for observing particle-induced GIS insulator discharge and surface flashover according to claim 1, wherein: the high-voltage power supply device comprises a high-voltage power supply and a protective resistor, wherein the high-voltage power supply is connected to a high-voltage bushing through the protective resistor, the high-voltage bushing is arranged on the metal cavity through a flange, and the high-voltage power supply applies high voltage to the post insulator flashover platform through the protective resistor, the high-voltage bushing and the high-voltage guide rod.
12. A method for observing particle-induced GIS insulator discharge and surface flashover is characterized by comprising the following steps: the use of the particle-induced GIS insulator discharge and surface flashover observation device of any one of claims 1 to 11 for pretreatment test and pressurization test:
the pretreatment test comprises the following steps:
vacuumizing the metal cavity, and filling SF into the metal cavity6/N2Mixing the gas;
heating the metal cavity to reach a preset temperature;
the compression test comprises:
the high-voltage power supply device applies voltage to the post insulator until the post insulator flashover;
the optical detection device detects the optical signal and transmits the optical signal to the computer; the high-speed camera device shoots the flashover and transmits the flashover to the computer.
13. The method for observing particle-induced GIS insulator discharge and surface flashover according to claim 12, wherein the method comprises the following steps: the high-voltage power supply device applies voltage to the post insulator by adopting a step pressurization method.
14. The method for observing particle-induced GIS insulator discharge and surface flashover according to claim 12, wherein the method comprises the following steps: the SF6/N2The volume ratio of sulfur hexafluoride to nitrogen in the mixed gas is 2: 8.
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