CN115113005A - Simulation test method and device for cable terminal dust deposition and flashover caused by damp - Google Patents
Simulation test method and device for cable terminal dust deposition and flashover caused by damp Download PDFInfo
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- CN115113005A CN115113005A CN202210664339.6A CN202210664339A CN115113005A CN 115113005 A CN115113005 A CN 115113005A CN 202210664339 A CN202210664339 A CN 202210664339A CN 115113005 A CN115113005 A CN 115113005A
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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
- G01R31/1263—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
- G01R31/1272—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 cable, line or wire insulation, e.g. using partial discharge measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/18—Screening arrangements against electric or magnetic fields, e.g. against earth's field
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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
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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
- G01R31/20—Preparation of articles or specimens to facilitate testing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention discloses a simulation test method and a simulation test device for cable terminal dust deposition and damp flashover, wherein the method comprises the following steps: the test cable terminal is arranged in the insulation shielding shell; adjusting the test temperature through a temperature control unit, and opening a second fan for convection heating to enable the temperature inside the insulation shielding shell to be uniform; adjusting the inclination angle of the test cable terminal relative to the horizontal plane; opening the wind power unit, and simultaneously adjusting the size of the outlet air of the second fan to enable the sprayed accumulated dust or water mist to cover the test cable terminal along the wind direction, so as to obtain test cable terminals with different levels of pollution degrees; and adjusting the voltage of the booster, and carrying out flashover test on the test cable terminals carrying different levels of pollution degrees. The invention can simulate the flashover discharge of the cable terminal under different dust deposition grades and different moisture degrees in the temperature control environment, provides equipment support for the research related to the flashover discharge of the cable terminal, and solves the problem that pollution factors are not considered in a flashover simulation test in the prior art.
Description
Technical Field
The invention belongs to the field of simulation tests of cable terminal states, and particularly relates to a simulation test method and device for cable terminal dust deposition, damp and flashover.
Background
With the large-scale application of power cables, the reliability of cable operation is more and more important. As a weak link of the whole circuit, the cable terminal is generally polluted and damped due to the fact that part of the cable terminal is in a severe and complex working environment for a long time, and the problem of flashover of the cable terminal caused by the polluted and damped phenomenon is also endless.
In the prior art, a power frequency voltage withstand test system and a power frequency voltage withstand test method (application number: CN2017103943504) of a vehicle-mounted cable terminal under a cold and hot alternating working condition are disclosed, wherein the power frequency voltage withstand test method is suitable for a cable terminal test under the condition of large temperature difference in a cold season.
Disclosure of Invention
The invention discloses a method and a device for simulating a cable terminal dust deposition and flashover under the conditions of different dust deposition grades and different moisture degrees in a temperature control environment, which can simulate flashover discharge of the cable terminal under the conditions of different dust deposition grades and different moisture degrees, provide equipment support for related research of flashover discharge of the cable terminal, and solve the problem that pollution factors are not considered in a flashover simulation test in the prior art.
In a first aspect of the present invention, a method for simulating a cable termination dust deposit and flashover under damp is provided, which comprises the following steps:
step 1, a test cable terminal is arranged in an insulation shielding shell;
step 4, the dust deposition unit and the water mist unit are positioned in the wind power unit with the air outlet height higher than that of the second fan, the first fan in the wind power unit is opened, and the air outlet size of the second fan is adjusted at the same time, so that the sprayed dust deposition or water mist covers the test cable terminal along with the wind direction, and the test cable terminals with different levels of pollution degrees are obtained; and 5, adjusting the voltage of the booster, and performing flashover test on the test cable terminals carrying different levels of pollution degrees.
In a preferred embodiment, in the wind power unit, the accumulated dust which is not sprayed out from the air outlet is collected to one end, far away from the air outlet, in the wind power unit along with the water mist; after the flashover test is finished, the wind power of the first fan and the second fan is adjusted and controlled, and the air outlet of the wind power unit and the test cable terminal are cleaned by spraying water mist.
In a preferred embodiment, the different levels of pollution levels in the test cable terminals with different levels of pollution levels in step 4 include different dust deposition levels, combined changes of different degrees of humidity, and single changes.
In a preferred embodiment, the formation process of the combined change of different ash deposition levels and different moisture degrees is as follows: and alternately spraying accumulated dust or water mist for many times, and controlling the temperature of the temperature control unit to accelerate the condensation of the water mist and the accumulated dust on the outer surface of the test cable terminal in the water mist spraying process.
In a second aspect of the present invention, there is provided a cable termination dust deposition and moisture flashover simulation test apparatus using the above simulation test method, including:
the testing cable terminal is arranged in the insulating shielding shell to carry out dust deposition, damp and flashover tests and is connected with the voltage boosters providing voltages of different grades, a wind power unit is fixed on the inner wall of the insulating shielding shell in the end part direction of the testing cable terminal, and a second fan with the wind outlet height lower than that of the wind power unit is arranged in the other end part direction of the testing cable terminal;
the temperature control unit is positioned above the test cable terminal and connected with an upper computer, and provides different temperatures according to instructions of the upper computer;
the dust deposition unit is connected with the upper computer and provides dust deposition of different grades for the test cable terminal according to the instruction of the upper computer;
the water mist unit is connected with the upper computer and provides water mist of different grades for the test cable terminal according to the instruction of the upper computer;
the dust deposition unit and the water mist unit are positioned in front of the air outlet direction of the wind power unit, and the sprayed dust deposition and water mist cover the test cable terminal along with the air outlet direction of the wind power unit.
In a preferred embodiment, the wind power unit comprises a first fan, a side baffle and a lower baffle, an unsealed opening between the side baffle and the lower baffle forms an air outlet, the dust deposition unit and the water mist unit are positioned in the air outlet, and the lower baffle is a baffle inclined towards the interior of the wind power unit compared with a horizontal plane and is used for collecting dust deposition and water mist scattered in the air outlet.
In a preferred embodiment, the test cable terminal is mounted on two insulating supports in the insulating shielding shell, a gear rotating structure is arranged inside a supporting end of one of the insulating supports and used for driving the test cable terminal to rotate on the insulating support, and a telescopic rod connected with a power supply is arranged inside a column body of the insulating support and used for adjusting the inclination angle of the test cable terminal relative to the horizontal plane.
In a preferred embodiment, the temperature control unit comprises a heating rod which is positioned above the test cable terminal and fixed on the upper top surface inside the insulation shielding shell, and the heating rod is connected with the upper computer.
In a preferred embodiment, the dust deposition unit comprises a controllable dust diffuser, a dust deposition pipeline, a dust box and a dust diffusion controller, the controllable dust diffuser is communicated with the dust box through the dust deposition pipeline and is used for spraying deposited dust, a signal input end of the dust box is connected with a signal output end of the dust diffusion controller, and a signal input end of the dust diffusion controller is connected with the upper computer.
In a preferred embodiment, the water mist unit comprises a controllable water sprayer, a water flow pipeline, a water storage tank and a water mist controller, wherein the controllable water sprayer is communicated with the water storage tank through the water flow pipeline and is used for spraying water mist, the signal input end of the water storage tank is connected with the signal output end of the water mist controller, and the signal input end of the water mist controller is connected with the upper computer.
Compared with the prior art, the invention has the following beneficial effects:
1. in the simulation test method, the test parameters are controllable, different dust deposition grades on the surface of the cable terminal can be conveniently controlled, different moisture degrees on the surface of the cable terminal can be conveniently controlled, the related tests of the joint change and the single change of the different dust deposition grades and the different moisture degrees of the cable terminal can be developed, and the simulation test of the flashover of the cable terminal under different voltages can be carried out.
2. The device design in the invention considers the cleaning and dismounting work, and is easy to clean, dismount and replace.
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 should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
FIG. 1 is a schematic flow chart of a simulation test method for cable terminal dust deposition, damp flashover according to the present invention;
FIG. 2 is a schematic overall structure diagram of a cable terminal dust deposition, damp and flashover simulation test device in an embodiment of the present invention;
reference numbers in the figures:
1. power supply 2. voltage booster
3. Insulating support 4. test cable terminal
5. Grounding ring 6. grounding electrode
7. First fan 8, second fan
9. Controllable dust diffuser 10, controllable water sprayer
11. Dust box 12, dust-dispersing controller
13. Water storage tank 14. water mist controller
15. Upper computer 16 insulating shielding shell
17. Conductor 18. conductor
19. Conductor 20. conductor
21. Lead 22. dust-deposition pipeline
23. Water flow pipeline 24. conducting wire
25. Data transmission line 26. data transmission line
27. Wire 28. lower baffle
29. Air outlet 30, side baffle
31. Heating rod 32, controllable ventilation opening
33. Telescopic rod 34, gear revolution mechanic
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.
Based on the phenomenon that the cable terminal is often affected by dust deposition and flashover due to dampness under the normal-temperature working condition environment, the invention provides a simulation test method for the dust deposition and flashover of the cable terminal, which comprises the following steps as shown in figure 1:
step 1, the test cable terminal is installed in the insulation shielding shell, the test process is preferably finished in an environment insulated from the outside, external interference factors of a laboratory are shielded, and test parameters are convenient to regulate, control and detect in an insulation shielding range.
And 2, adjusting the test temperature inside the insulating shielding shell through the temperature control unit, and opening a second fan for convection heating to enable the temperature inside the insulating shielding shell to be more quickly and uniformly radiated compared with the temperature inside the insulating shielding shell in a natural state.
The working environment of the cable terminal, no matter outdoor or indoor, avoids the self heating temperature rise of the cable terminal, and relates to the temperature change in the working environment, so the influence of the temperature change on the formation of dirt and the influence on flashover need to be considered in the test process. In the early stage of the test, the temperature inside the insulation shielding shell can be adjusted according to the test conditions, and the temperature inside the insulation shielding shell can also be adjusted in the test process. Through the second fan, can form convection heating for inside bulk temperature is balanced fast, is equipped with the vent that opens and shuts on the inner wall of insulation shield shell, can give the inside cooling of insulation shield shell through the second fan.
And 3, adjusting the inclination angle of the test cable terminal relative to the horizontal plane. Under the general operating condition of cable termination, its installation form is different, and under different forms such as horizontal installation, slope installation, its ash deposit or water smoke angle of accepting is different, and the accepting is different, also has the difference to the influence of flashover. Therefore, in the simulation test method provided by the invention, the simulation test parameters are further perfected by adjusting the inclination angle of the test cable terminal relative to the horizontal plane, and the flashover characteristic of the test cable terminal under different inclination angles is explored.
And 4, the dust deposition unit and the water mist unit are positioned in the wind power unit with the wind outlet height higher than that of the second fan, the first fan in the wind power unit is turned on, and the wind outlet size of the second fan is adjusted at the same time, so that the sprayed dust deposition or water mist covers the test cable terminal along the wind direction, and the test cable terminals with different levels of pollution degrees are obtained.
The simulation test is used for simulating the influence factors of dust deposition and wetting on flashover in the working environment of the cable terminal, and the dust deposition and water mist are mixed and solidified on the outer surface of the cable terminal under normal conditions, so that the simulation test comprises the related tests of different dust deposition grades, combined change of different wetting degrees and single change, namely, dust deposition of different grades, wetting of different grades or dust deposition condensation of different grades.
The formation process of the ash deposition coagulation of different grades comprises the following steps: and alternately spraying accumulated dust or water mist for many times, controlling the temperature of the temperature control unit to accelerate the condensation of the water mist and the accumulated dust on the outer surface of the test cable terminal in the water mist spraying process, and preventing the water mist and the accumulated dust from forming mud flow and flowing away along the test cable terminal.
In the wind power unit of the method, in order to simulate the working environment of the test cable terminal, the deposited dust and water mist fall along the wind direction and cover the test cable terminal, so that the test is close to the actual working environment of the cable terminal, and the test result data is closer to the real condition. Therefore, the deposited dust and the water mist are positioned in the wind power unit, and the sprayed deposited dust and the sprayed water mist fly to fall on the terminal of the test cable along with wind. However, the accumulated dust which is not sprayed out of the air outlet can be collected to one end, far away from the air outlet, of the wind power unit along with water mist, so that the wind power unit is convenient to clean; and after the flashover test is finished, adjusting and controlling the wind power of the wind power unit and the second fan, and spraying water mist to clean the air outlet of the wind power unit and the test cable terminal.
And 5, after the preparation work is finished, adjusting the voltage of the booster, and performing flashover test on the test cable terminals with different levels of pollution degrees.
The invention discloses a simulation test method for cable terminal dust deposition and damp flashover, which can simulate flashover discharge conditions of a cable terminal under different dust deposition grades, combined changes of different damp degrees and single changes, has more comprehensive parameter coverage than a test device only considering temperature parameters, and provides support for relevant research on cable terminal flashover discharge.
Based on the simulation test method for the cable terminal dust deposition and wet flashover, the invention provides a device applying the simulation test method, namely a simulation test device for the cable terminal dust deposition and wet flashover, and as shown in figure 2, the device comprises a test cable terminal, a temperature control unit, a dust deposition unit and a water mist unit.
And the test cable terminal 4 is arranged in the insulation shielding shell 16 for carrying out dust accumulation and damp flashover test and is connected with the booster 2 for providing different levels of voltage. The test cable terminal 4 is installed on two insulation supports in the insulation shielding shell 16, a gear rotating structure 34 is arranged inside a supporting end of one insulation support 3 and used for driving one end of the test cable terminal 4 to rotate on the insulation support 3, so that different surfaces of the cable terminal can be polluted and condensed, and a telescopic rod 33 connected with a power supply is arranged inside a cylinder of the insulation support and used for adjusting the inclination angle of the test cable terminal 4 relative to the horizontal plane. Before the test, the states of the test cable terminal 4 at different inclination angles can be adjusted, a flashover simulation test is carried out, and the influence of different levels of pollution degrees on flashover is borne under the condition that the test cable terminal 4 at different inclination angles is researched.
In this embodiment, a wind unit is fixed on the inner wall of the insulation shielding shell 16 in the end direction of the test cable terminal 4, and a second fan 8 with an air outlet height lower than that of the wind unit is arranged in the other end direction. The wind power unit is used for simulating natural wind and covering sprayed accumulated dust and water mist on the test cable terminal 4 along with the wind. As shown in fig. 2, the wind power unit includes a first fan 7, a side baffle 30 and a lower baffle 28, an unsealed opening between the side baffle 30 and the lower baffle 28 forms an air outlet 29, the dust deposition unit and the water mist unit are located in the air outlet 29, and the lower baffle 28 is a baffle inclined to the inside of the wind power unit compared with a horizontal plane and is used for collecting dust and water mist scattered in the air outlet 29.
The air outlet height of the second fan 8 is lower than that of the wind power unit, and convection heating can be formed when the temperature in the insulating shielding shell 16 is adjusted, so that the integral temperature in the insulating shielding shell is quickly balanced; in addition, the second fan 8 can be matched with the wind power unit, the wind power is adjusted and controlled, so that the sprayed dust and water mist can cover the test cable terminal 4, and the second fan can also be used for cleaning the inside of the insulating shielding shell 16. The inner wall of the insulation shielding shell 16 close to the second fan 8 is provided with a controllable ventilation opening 32, the temperature inside the insulation shielding shell 16 can be lowered by combining the controllable ventilation opening 32 with the second fan 8, and the temperature inside the insulation shielding shell 16 can be adjusted up and down.
And the temperature control unit is positioned above the test cable terminal 4 and connected with the upper computer 15, and provides different temperatures according to the instruction of the upper computer 15. In this embodiment, the temperature control unit includes that it fixes to be located 4 tops of test cable terminal the heating rod 31 at insulating shield shell 16 top, and heating rod 31 connects host computer 15, realizes the temperature variation in insulating shield shell 16 through heating rod 31.
And the dust deposition unit is connected with the upper computer 15 and provides dust deposition of different grades for the test cable terminal 4 according to the instruction of the upper computer 15.
In this embodiment, the deposition unit includes controllable dust scattering device 9, deposition pipeline 22, dirt box 11 and dust scattering controller 12, controllable dust scattering device 9 communicates through deposition pipeline 22 dirt box 11 is used for spraying the deposition, the signal input part of dirt box 11 is connected the signal output part of dust scattering controller 12, the signal input part of dust scattering controller 12 is connected host computer 15.
The water mist unit is connected with the upper computer 15 and provides water mist of different grades for the test cable terminal 4 according to the instruction of the upper computer 15.
In this embodiment, the water mist unit includes controllable water sprayer 10, water flow pipeline 23, storage water tank 13, water mist controller 14, controllable water sprayer 10 passes through water flow pipeline 23 intercommunication storage water tank 13 is used for spraying water mist, the signal input part of storage water tank 13 is connected the signal output part of water mist controller 14, the signal input part of water mist controller 14 is connected host computer 15. The dust deposition unit and the water mist unit are positioned in front of the air outlet direction of the wind power unit, and the sprayed dust deposition and water mist cover the test cable terminal 4 along with the air outlet direction of the wind power unit.
When the test device works, the test cable terminal 4 is placed on the insulating support 3 in the insulating shielding shell 16, the height of the insulating support 3 is adjusted according to test data so that the test cable terminal 4 keeps an inclined angle, test voltage is applied to the test cable terminal 4 through the power supply 1, the booster 2 and the leads 17-18, and grounding is completed through the grounding ring 5, the lead 27 and the grounding electrode 6 which are fixed on the test cable terminal 4; the upper computer 15 controls the dust scattering controller 12 through a data transmission line 26, is connected with the dust box 11 through a lead 21, and is communicated with the controllable dust scattering device 9 through a pipeline 22 to realize simulation test of different dust accumulation grades of the cable terminal 4; the upper computer 15 controls the water mist controller 14 through a data transmission line 25, is connected with the water storage tank 13 through a lead 24, and is connected with the controllable water sprayer 10 through a pipeline 23 to realize simulation test of different moisture degrees of the cable terminal 4; the heating rod 31 is connected with the upper computer 15 through a lead; the first fan 7-8 and the second fan 7-8 are respectively connected with the power supply 1 through leads 19-20, and the surface of the test cable terminal 4 is uniformly accumulated with dust and is affected with damp by applying wind power; after the test is finished, the controllable water sprayer sprays water mist, the inside of the wind power unit can be cleaned, and the water mist falls on the test cable terminal in a floating manner by means of the interaction force of wind power between the two fans, so that the test cable terminal can be cleaned.
During testing, a test cable terminal is placed according to the mode shown in the figure 2, the related tests of different dust deposition grades, different joint changes of the moisture degrees and single change of the cable terminal are carried out, and the simulation test of the flashover of the cable terminal is carried out.
The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present application and such modifications and equivalents should also be considered to be within the scope of the present application.
Claims (10)
1. A simulation test method for cable terminal dust deposition, damp and flashover is characterized by comprising the following steps:
step 1, a test cable terminal is arranged in an insulation shielding shell;
step 2, adjusting the test temperature in the insulation shielding shell through the temperature control unit, and turning on a second fan for convection heating to enable the temperature in the insulation shielding shell to be rapid and uniform;
step 3, adjusting the inclination angle of the test cable terminal relative to the horizontal plane;
step 4, the dust deposition unit and the water mist unit are positioned in the wind power unit with the wind outlet height higher than that of the second fan, the first fan in the wind power unit is turned on, and the wind outlet size of the second fan is adjusted at the same time, so that the sprayed dust deposition or water mist covers the test cable terminal along the wind direction, and test cable terminals with different levels of pollution degrees are obtained;
and 5, adjusting the voltage of the booster, and performing flashover test on the test cable terminals carrying different levels of pollution degrees.
2. The method for simulating cable termination dust deposit and moisture flashover according to claim 1,
in the wind power unit, the accumulated dust which is not sprayed out from the air outlet is collected to one end, far away from the air outlet, in the wind power unit along with the water mist; after the flashover test is finished, the wind power of the first fan and the second fan is adjusted and controlled, and the air outlet of the wind power unit and the test cable terminal are cleaned by spraying water mist.
3. The method for simulating cable termination dust deposit and moisture flashover according to claim 1,
and 4, testing the pollution degrees of different grades in the cable terminal, wherein the pollution degrees of different grades comprise different dust accumulation grades, joint change of different damp degrees and single change.
4. The method for simulating cable termination dust deposit and moisture flashover according to claim 3,
the formation process of the combined change of different dust deposition grades and different moisture degrees is as follows: and alternately spraying accumulated dust or water mist for many times, and controlling the temperature of the temperature control unit to accelerate the condensation of the water mist and the accumulated dust on the outer surface of the test cable terminal in the water mist spraying process.
5. A simulation test device of a simulation test method of cable termination dust deposition and wet flashover according to any one of claims 1 to 4, characterized by comprising:
the testing cable terminal (4) is arranged in the insulating shielding shell (16) to carry out dust deposition, damp and flashover tests and is connected with the booster (2) providing voltages of different levels, a wind power unit is fixed on the inner wall of the insulating shielding shell (16) in the end part direction of the testing cable terminal (4), and a second fan (8) with the air outlet height lower than that of the wind power unit is arranged in the other end part direction;
the temperature control unit is positioned above the test cable terminal (4) and is connected with an upper computer (15), and different temperatures are provided according to instructions of the upper computer (15);
the dust deposition unit is connected with the upper computer (15) and provides dust deposition of different grades for the test cable terminal (4) according to the instruction of the upper computer (15);
the water mist unit is connected with an upper computer (15) and provides water mist of different grades for the test cable terminal (4) according to the instruction of the upper computer (15);
the dust deposition unit and the water mist unit are positioned in front of the air outlet direction of the wind power unit, and the sprayed dust deposition and water mist cover the test cable terminal (4) along with the air outlet direction of the wind power unit.
6. The simulation test device for cable termination dust accumulation and wet flashover according to claim 5,
the wind power unit comprises a first fan (7), a side baffle (30) and a lower baffle (28), an air outlet (29) is formed by an unsealed opening between the side baffle (30) and the lower baffle (28), the dust deposition unit and the water mist unit are positioned in the air outlet (29), and the lower baffle (28) is used for collecting dust deposition and water mist scattered in the air outlet (29) compared with a baffle inclined towards the interior of the wind power unit horizontally.
7. The simulation test device for cable termination dust accumulation and wet flashover according to claim 5,
the test cable terminal (4) is installed on two insulating supports in the insulating shielding shell (16), a gear rotating structure is arranged in a supporting end of one insulating support (3) and used for driving the test cable terminal (4) to rotate on the insulating support, and a telescopic rod (33) connected with a power supply is arranged inside a cylinder of the insulating support (3) and used for adjusting the inclination angle of the test cable terminal (4) relative to the horizontal plane.
8. The simulation test device for cable termination dust accumulation and wet flashover according to claim 5,
the temperature control unit comprises a heating rod (31) which is located above the test cable terminal (4) and fixed on the upper top surface inside the insulation shielding shell (16), and the heating rod (31) is connected with the upper computer (15).
9. The simulation test device for cable termination dust accumulation and wet flashover according to claim 5,
the deposition unit includes controllable dust scattering device (9), deposition pipeline (22), dirt box (11) and scattered dirt controller (12), controllable dust scattering device (9) is through deposition pipeline (22) intercommunication dirt box (11) are used for spraying the deposition, the signal input part of dirt box (11) is connected the signal output part of scattered dirt controller (12), the signal input part of scattered dirt controller (12) is connected host computer (15).
10. The simulation test device for cable terminal ash deposition and wet flashover according to claim 5, wherein the water mist unit comprises a controllable water sprayer (10), a water flow pipeline (23), a water storage tank (13) and a water mist controller (14), the controllable water sprayer (10) is communicated with the water storage tank (13) through the water flow pipeline (23) for spraying water mist, a signal input end of the water storage tank (13) is connected with a signal output end of the water mist controller (14), and a signal input end of the water mist controller (14) is connected with the upper computer (15).
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| CN202210664339.6A CN115113005B (en) | 2022-06-13 | 2022-06-13 | Simulation test method and device for cable terminal dust accumulation and damp flashover |
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| CN202210664339.6A CN115113005B (en) | 2022-06-13 | 2022-06-13 | Simulation test method and device for cable terminal dust accumulation and damp flashover |
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| CN115113005B (en) | 2023-08-22 |
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