CN108519545A - It is a kind of it is extremely cold under the conditions of high-tension insulator edge flashing experimental provision and method - Google Patents
It is a kind of it is extremely cold under the conditions of high-tension insulator edge flashing experimental provision and method Download PDFInfo
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- CN108519545A CN108519545A CN201810569207.9A CN201810569207A CN108519545A CN 108519545 A CN108519545 A CN 108519545A CN 201810569207 A CN201810569207 A CN 201810569207A CN 108519545 A CN108519545 A CN 108519545A
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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
- G01R31/1227—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
- G01R31/20—Preparation of articles or specimens to facilitate testing
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Abstract
It is a kind of it is extremely cold under the conditions of high-tension insulator edge flashing experimental provision and method, belong to high voltage installation experimental technique field.The device includes closed air chamber, the first conducting rod and grading ring, protective resistance, high voltage power supply, measuring device, the first cryogenic refrigeration equipment, the second cryogenic refrigeration equipment, RC divider and high-voltage digital voltmeter; the present invention is using glycol water as low-temperature circulating fluid; the high-pressure side and low-pressure end of high-tension insulator are cooled down; while realizing temperature gradient; for various situations of the analogous pole under the conditions of cold, glycol water has the function of insulation as low-temperature circulating fluid.
Description
Technical field
The present invention relates to high voltage installation experimental technique field, more particularly to it is a kind of it is extremely cold under the conditions of high-tension insulator along face
Flashover test device and method.
Background technology
GIS/GIL equipment is applied since the 1960s and 1970s and has been run on all over the world extensively, and extra-high
Pressure transmission of electricity and offshore large-scale wind power transportation art have huge applications foreground.However GIS/GIL belongs to gentle by solid dielectric
Body medium composition meets insulation system, and the part of internal gas-solid boundary is whole system insulation place the weakest.
Under the action of certain applied voltage, creeping discharge often occurs first at gas-solid interface inside GIS/GIL；With pressurization width
It is worth the raising with the time, the creeping discharge on gas-solid interface may develop into the breakdown of penetrability, and it is existing to generate edge flashing
As influencing the normal operation of equipment, even resulting in the generation of insulation fault.Therefore, dielectric gas-solid interface flashover property is studied,
Have great importance for improving gas insulated electric apparatus reliability of operation.
China has a vast territory, and various regions climate difference is very big, and there are extremely cold areas in the areas such as China northeast and northwest, and winter is most
Low temperature for a long time can be down to -40 DEG C or less.Electrical equipment is inevitably run in extremely cold area.In order to ensure that power supply can
By property, insulating materials used in electrical equipment allows for meeting the equipment reliability service under extremely cold environment for a long time.
GIS/GIL under the conditions of extremely cold, inside will appear zubzero temperature, lead to gas and insulator temperature non-uniform Distribution, guide rod
Temperature difference is formed between shell, and is increased and increased with electric current.Under the conditions of extremely cold, the temperature inside GIS/GIL equipment can be led
The temperature of insulator surface is caused to change, to make the volume conductance, surface conductivity and dielectric constant of insulator send out
Raw to change, further influencing the insulation performance of insulator causes insulator that edge flashing occurs.China at present exists to insulating materials
Electric property research under extremely cold area environment is less, and how mechanical property and electrical characteristic become insulating materials under cryogenic
Change is unclear, electrical under the conditions of extremely cold to insulating materials to ensure that electrical equipment is safe and reliable in extremely cold area
Performance study has important practical significance, therefore is just badly in need of carrying out the experiment of high-tension insulator edge flashing under the conditions of extremely cold
Research.
There are still many shortcomings, only heating device not to have low temperature for high-tension insulator edge flashing experimental provision at present
Cooling device, is unable to the actual condition of the GIS under the conditions of analogous pole is trembled with fear, and is carried out in fact in completely enclosed relatively atmospheric chamber
When testing, gas usage amount is big and can not achieve flashover experiment under the conditions of different air pressures, gas componant, and flashover is fixed with material, no
It can replace, be only capable of carrying out the flashover experiment under a kind of voltage conditions, be not applied for the multiple voltages item such as alternating current and direct current, impact
Experiment under part does not have certain versatility.
Invention content
Of the existing technology in order to solve the problems, such as, the present invention has certain versatility, and the present invention uses deionized water
With the mixed liquor of ethylene glycol, abbreviation glycol water aqueous solution, as low-temperature circulating fluid to the electricity at flashover insulator both ends
Pole is cooled down, and for simulating various situations when operation under the conditions of extremely cold, glycol water is as low-temperature circulating fluid
Have the function of insulation, ensure that insulating properties when being flowed through from high pressure hollow electrode.
The present invention provides it is a kind of it is extremely cold under the conditions of high-tension insulator edge flashing experimental provision, which includes closing gas
Room, the first conducting rod and grading ring, protective resistance, high voltage power supply, measuring device, the first cryogenic refrigeration equipment, the second low temperature system
Cool equipment, RC divider and high-voltage digital voltmeter, one end ground connection of the high voltage power supply, the other end are sequentially connected protection electricity
The high-pressure side of resistance and grading ring, RC divider connects grading ring, and ground terminal is grounded, and output end connects high-voltage digital voltage
Table；
The side wall of the closed air chamber is hollow cylindrical tube, and being riveted at the lower ending opening of the hollow cylindrical tube has bottom cover
Plate, and bottom cover plate is grounded, fixing seal has sealing insulator, the sealing insulator at the upper port of the hollow cylindrical tube
Center at through being plugged with the first conducting rod, the top of first conducting rod is socketed with grading ring,
The measuring device a includes hollow electrode, the first grading shield, flashover insulator, cryogen cycle cylinder, second
The bottom end of grading shield, the second conducting rod and third grading shield, the hollow electrode is installed with the first grading shield, described hollow
The top of electrode is spirally connected the first conducting rod, and the lower end of the first grading shield fits closely the upper table of high-pressure side in the middle part of flashover insulator
The low-pressure end in face, flashover insulator is fixedly connected on the inner wall of cylinder, and the lower surface of flashover insulator middle part high-pressure side is successively
Connect the second grading shield, the second conducting rod and third grading shield；
The bottom end of the cylinder is bolted with supporting rod, the upper surface of the lower end welding bottom cover plate of supporting rod, the cylinder
It is spirally connected round cavity ring, and the grafting on the outer wall of the round cavity ring of the junction with the junction of flashover insulator low-pressure end
There are a cryogen inlet pipe and cryogen outlet pipe, the end of the cryogen inlet pipe and cryogen outlet pipe passes through bottom cover plate
It is connect with the second cryogenic refrigeration equipment；
Two screw holes up and down are offered on the outer wall of the hollow electrode, are bolted with high temperature fluid inlet pipe and high-temperature stream respectively
The side wall of body outlet pipe, the hollow cylindrical tube is equipped with an opening, which is sealed by grafting seal cover board, described close
It is opened up on capping plate there are two horizontal export through-hole, the high temperature fluid inlet pipe and high temperature fluid outlet pipe are exported by two respectively
The end of the respective end of through-hole export, the high temperature fluid inlet pipe and high temperature fluid outlet pipe connects with the first cryogenic refrigeration equipment
It connects；
Air-filled pore is offered in the bottom cover plate, and gas tube is plugged in hole；
The inner wall of the first cryogenic refrigeration equipment is installed with high temperature fluid case, and the high temperature fluid case includes first
Water pump and the first temperature sensor, and the first water pump is fixedly connected with high temperature fluid inlet pipe, the first temperature sensor is fixedly connected with height
Warm fluid outlet pipe；
The inner wall of the second cryogenic refrigeration equipment is installed with cryogen case, and the cryogen case includes second
Water pump and second temperature sensor, and the second water pump is fixedly connected with cryogen inlet pipe, second temperature sensor is fixedly connected low
Warm fluid outlet pipe；
Fluid in the high temperature fluid case and cryogen case is the mixed liquor of deionized water and ethylene glycol.
The lateral wall of the gas tube is installed with valve.
It is a kind of it is extremely cold under the conditions of high-tension insulator edge flashing experimental method, using described in claim 1 a kind of extremely cold
Under the conditions of high-tension insulator edge flashing experimental provision realize, which is characterized in that the method includes：
Step 1, by the evacuating air in closed air chamber, and the gas with certain pressure is filled with into closed air chamber,
The structure in closed air chamber is installed simultaneously, hollow electrode is made to be connected with high temperature fluid inlet pipe and high temperature fluid outlet pipe, and will be dodged
Network insulator is bonded cylinder inner wall, and plus the defect factors for influencing the flashover voltage of the insulator on flashover insulator；
High temperature fluid case and low temperature is respectively set in the first cryogenic refrigeration equipment and the second cryogenic refrigeration equipment in step 2
The temperature of fluid tank, after setting, open refrigeration mode, to the glycol water in high temperature fluid case and cryogen case into
Row refrigeration, while being monitored respectively in high temperature fluid case and cryogen case with the first temperature sensor and second temperature sensor
Temperature, when temperature is higher than preset value, the first temperature sensor and second temperature sensor send out cooling signals, when temperature reaches
When preset value, the first temperature sensor and second temperature sensor respectively by temperature signal pass to the first cryogenic refrigeration equipment and
Second cryogenic refrigeration equipment so that high temperature fluid case and cryogen case stop refrigeration；
Step 3 opens the first water pump and the second water pump, and glycol water is constantly inputted in hollow electrode, to sudden strain of a muscle
The high-pressure side and low-pressure end of network insulator cool down, after the electrode temperature of flashover insulator is stablized, using automatic boosting method to sudden strain of a muscle
Network insulator both ends apply voltage, and high-voltage digital table is used in combination to monitor the voltage at flashover insulator both ends in real time；
Step 4, etc. after flashovers insulator arc-over, measure and record flashover voltage, high voltage power supply is reduced to zero immediately；
Step 5 closes the first cryogenic refrigeration equipment, the second cryogenic refrigeration equipment, the first water pump, the second water pump successively；
Step 6 carries out discharge treatment to RC divider；
Step 7, after the temperature at flashover insulator both ends and hollow electrode reverts to room temperature, dismantle closed air chamber, observe
It in fault location flashover insulator surface due to the trace that flashover discharges and generates, and takes pictures, determines that edge flashing is happened at defect
Place；
Step 8, the trace for disposing flashover insulator surface, then wiped with absolute ethyl alcohol, then repeatedly step to step,
It is tested next time.
Whether it is the temperature needed that the automatic boosting method is according to the high-pressure side and low-pressure end of flashover insulator, if flashover
The high-pressure side of insulator and the temperature of low-pressure end are not required temperature, adjust external transformer and stop to flashover insulator
Both ends are pressurizeed, and when the high-pressure side of flashover insulator and low-pressure end are to need temperature, are adjusted external transformer and are insulated to flashover
High-pressure side and the low-pressure end pressurization of son, judge whether flashover insulator occurs flashover, if flashover insulator not flashover, continues to dodge
The high-pressure side of network insulator and the temperature of low-pressure end.
Advantageous effect：The present invention can save the usage amount of various gases, another party by using smaller closed air chamber
Face is easily installed, and the flashover experiment under the conditions of different air pressures, gas componant may be implemented, including under the new gas such as environmentally friendly gas
Flashover test, and the present invention is in suitable for the multiple voltages condition such as alternating current and direct current, impact, and flashover electric(al) insulator mould
Type, which can increase experiment condition, such as roughness, surface characteristic, metal particle etc., therefore the present invention, has certain versatility, and this
Invention cools down the high-pressure side and low-pressure end of flashover insulator as low-temperature circulating fluid using glycol water, in reality
While existing temperature gradient, for simulating various situations under the conditions of extremely cold, glycol water is as low-temperature circulating fluid
Have the function of insulation, ensure that insulating properties when being flowed through from high pressure hollow electrode, protects other facilities such as water pump, and low temperature
Refrigeration equipment is located at the outside of closed air chamber, substantially reduces the influence to experiment, simultaneously because the boiling point of ethylene glycol is 197.3
DEG C, it is tested so the device can equally carry out insulator edge flashing under hot conditions.
Description of the drawings
Fig. 1 be the present invention it is extremely cold under the conditions of high-tension insulator edge flashing experimental provision structural schematic diagram；
Fig. 2 be the present invention Fig. 1 in measuring device structural schematic diagram；
Fig. 3 be the present invention it is extremely cold under the conditions of high-tension insulator edge flashing experimental provision round cavity ring in oil stream
Dynamic schematic diagram；
Fig. 4 be the present invention it is extremely cold under the conditions of high-tension insulator edge flashing experimental provision automatic Regulation method pressure regulation stream
Cheng Tu.
In figure：1, closed air chamber, 2, sealing insulator, the 3, first conducting rod, 4, grading ring, 5, hollow electrode, 6, first
Grading shield, 7, high temperature fluid inlet pipe, 8, high temperature fluid outlet pipe, 9, high temperature fluid case, the 901, first water pump, the 902, first temperature passes
Sensor, the 10, first cryogenic refrigeration equipment, 11, hollow cylindrical tube, 12, seal cover board, 13, bottom cover plate, 14, air-filled pore, 15,
Gas tube, 16, air valve, 17, cryogen inlet pipe, 18, cryogen inlet pipe, 19, cryogen case, the 1901, second water pump,
1902, second temperature sensor, the 20, second cryogenic refrigeration equipment, 21, supporting rod, 22, cylinder, 23, round cavity ring, 24, dodge
Network insulator, the 25, second grading shield, the 26, second conducting rod, 27, third grading shield, 28, protective resistance, 29, high voltage power supply,
30, RC divider, 31, high-voltage digital table, a, measuring device.
Specific implementation mode
Below in conjunction with the attached drawing in inventive embodiments, the technical solution in inventive embodiments is carried out clearly and completely
Description,
Such as Fig. 1, the present invention provides it is a kind of it is extremely cold under the conditions of high-tension insulator edge flashing experimental provision, which includes
Closed air chamber 1, the first conducting rod 3 and grading ring 4, protective resistance 28, high voltage power supply 29, measuring device a, the first cryogenic refrigeration are set
Standby 10, second cryogenic refrigeration equipment 20, RC divider 30 and high-voltage digital voltmeter 31, and 10 He of the first cryogenic refrigeration equipment
Temperature range, digital-scroll technique can be freely arranged in second cryogenic refrigeration equipment 20, and the RC divider 30 is a kind of universal
High-tension measurement instrument can be used for electric system, electric appliance, electronic equipment manufacturing department's measurement industrial frequency AC high voltage and the high electricity of direct current
Pressure.It is to be made of high-tension measurement part and low pressure display instrument, and high-voltage digital table 31 is matched with RC divider 30, tool
Have the advantages that easy to use, intuitive display, high certainty of measurement, one end ground connection of the high voltage power supply 29, the other end are sequentially connected
The high-pressure side of protective resistance 28 and grading ring 4, RC divider 30 connects grading ring 4, and ground terminal is grounded, output end connection
High-voltage digital voltmeter 31；
Such as Fig. 2, the side wall of the closed air chamber 1 is hollow cylindrical tube 11, at the lower ending opening of the hollow cylindrical tube 11
Riveting has bottom cover plate 13, and bottom cover plate 13 is grounded, and fixing seal has sealing exhausted at the upper port of the hollow cylindrical tube 11
Edge 2, through being plugged with the first conducting rod 3, the top socket of first conducting rod 3 at the center of the sealing insulator 2
There is grading ring 4；
The measuring device a includes hollow electrode 5, the first grading shield 6, flashover insulator 24, cryogen cycle cylinder
22, the second grading shield 25 and the material of the first grading shield 6 and the second grading shield 25 are aluminum material, and voltage can be made exhausted in flashover
Edge is uniformly distributed on 24 high-pressure side, the second conducting rod 26 and third grading shield 27, and the top of the hollow electrode 5 is spirally connected first
The bottom end of conducting rod 3, the hollow electrode 5 is installed with the first grading shield 6, and the lower end of the first grading shield 6 fits closely sudden strain of a muscle
The upper surface of 24 middle part high-pressure side of network insulator, the low-pressure end of flashover insulator 24 are fixedly connected on the inner wall of cylinder 22, are dodged
The lower surface of 24 middle part high-pressure side of network insulator is sequentially connected the second grading shield 25, the second conducting rod 26 and third grading shield 27；
The bottom end of the cylinder 22 is bolted with supporting rod 21, and the upper surface of bottom cover plate 13 is welded in the lower end of supporting rod 21,
The junction of the cylinder 22 and 24 low-pressure end of flashover insulator is spirally connected round cavity ring 23, as shown in figure 3, and in the junction
Round cavity ring 23 outer wall on be plugged with cryogen inlet pipe 17 and cryogen outlet pipe 18, cryogen inlet pipe 17 and low
Warm fluid outlet pipe 18 is all made of the hard tube composition of PTFE materials, can bear -60 DEG C~+260 DEG C of temperature, meet our low
The end of the operating temperature that -40~0 DEG C of warm fluid, the cryogen inlet pipe 17 and cryogen outlet pipe 18 passes through bottom cover plate
13 connect with the second cryogenic refrigeration equipment 20；
Two screw holes up and down are offered on the outer wall of the hollow electrode 5, are bolted with high temperature fluid inlet pipe 7 and high temperature respectively
Fluid outlet pipe 8 meets fluid flowing law, is cooled down to hollow electrode convenient for fluid, high temperature fluid inlet pipe 7 and high temperature fluid
Outlet pipe 8 is to be formed using the hard tube of PTFE materials, can bear -60 DEG C~+260 DEG C of temperature, meet our high-temperature stream
The operating temperature of body -20~0 DEG C, PTFE can ensure that high-field electrode insulate with hollow cylindrical tube 11, and can ensure to vacuumize
When high temperature fluid inlet pipe 7 and high temperature fluid outlet pipe 8 it is indeformable and can bend in a certain range, the hollow cylindrical tube 11
Side wall is equipped with an opening, which is sealed by grafting seal cover board 12, opened up on the seal cover board 12 there are two
Level export through-hole, the high temperature fluid inlet pipe 7 and high temperature fluid outlet pipe 8 export respective end by two export through-holes respectively
The end of end, the high temperature fluid inlet pipe 7 and high temperature fluid outlet pipe 8 is connect with the first cryogenic refrigeration equipment 10；
Air-filled pore 14 is offered in the bottom cover plate 13, and gas tube 15 is plugged in hole；
The inner wall of the first cryogenic refrigeration equipment 10 is installed with high temperature fluid case 9, and high temperature fluid case 9 is using poly-
Carbonic ester PC plastic, has the characteristics that convenient in carrying, easy processing, heat safe, and operating temperature is at -20~0 DEG C, high temperature fluid case
9 are placed in the first cryogenic refrigeration equipment 10 and can ensure that influence of the first cryogenic refrigeration equipment 10 to experimental result reaches most
Small, the high temperature fluid case 9 includes the first water pump 901 and the first temperature sensor 902, and first temperature sensor 902 is led
If being made of thermistor, thermistor is made of metal oxide ceramic, is low cost, the highest temperature of sensitivity
Sensor, temperature-measuring range:Temperature range is -50 to 200 degree or so, meets design requirement, in addition has small, the response time
The advantages that fast, and the first water pump 901 is fixedly connected with high temperature fluid inlet pipe 7, the first temperature sensor 902 is fixedly connected with high temperature fluid
Outlet pipe 8；
The inner wall of the second cryogenic refrigeration equipment 20 is installed with cryogen case 19, and cryogen case 19 is equally adopted
With makrolon PC plastic, the cryogen case 19 includes the second water pump 1901 and second temperature sensor 1902, and described the
Two temperature sensors 1902 are equally to be made of thermistor, and the second water pump 1901 is fixedly connected with cryogen inlet pipe 17, the
Two temperature sensors 1902 are fixedly connected with cryogen outlet pipe 18；
Fluid in the high temperature fluid case 9 and cryogen case 19 is the mixed liquor of deionized water and ethylene glycol,
The temperature of a concentration of the 60% of middle ethylene glycol, freezing point can reach -48.3 DEG C, since ethylene glycol boiling point can reach 197.3
DEG C, which can equally carry out the experiment of the insulator edge flashing under hot conditions, while glycol water is as low temperature
Circulation of fluid has the function of insulation.
In the present invention it is a kind of it is extremely cold under the conditions of the experimental method of high-tension insulator edge flashing experimental provision include：
Step 1, by the evacuating air in closed air chamber 1, and the gas with certain pressure is filled with into closed air chamber 1
Body, is used for the air-tightness of check device, while installing the structure in closed air chamber 1, makes hollow electrode 5 and high temperature fluid inlet pipe
7 are connected with high temperature fluid outlet pipe 8, ensure that the interface between fluid inlet/outlet pipe and hollow electrode 5 and circular hollow slot 23 does not leak
Liquid, and flashover insulator 24 is bonded 22 inner wall of cylinder, and plus influence the flashover voltage of the insulator on flashover insulator 24
Defect factors；
Device is vacuumized and is filled with experimental gas by step 2, and in the first cryogenic refrigeration equipment 10 and the second cryogenic refrigeration
The temperature of high temperature fluid case 9 and cryogen case 19 is respectively set in equipment 20, the temperature setting of high temperature fluid case 9 is -20~0
DEG C, the temperature setting of cryogen case 19 is -40~0 DEG C, and the first cryogenic refrigeration equipment 10 and the second cryogenic refrigeration equipment 20
Positioned at the outside of closed air chamber 1, reduce the influence to experiment, easy to operation and control after setting, opens refrigeration mode, right
Glycol water in high temperature fluid case 9 and cryogen case 19 freezes, while with the first temperature sensor 902 and
Two temperature sensors 1902 are used for the temperature in monitoring high temperature fluid case 9 and cryogen case 19 respectively, when temperature is higher than setting
When temperature, the first temperature sensor 902 and second temperature sensor 1902 send out cooling signals, when temperature reaches setting temperature
When, temperature signal is passed to the first cryogenic refrigeration equipment by the first temperature sensor 902 and second temperature sensor 1902 respectively
10 and the second cryogenic refrigeration equipment 20 so that high temperature fluid case 9 and cryogen case 19 stop refrigeration, to ensure high temperature fluid
In case 9 and cryogen case 19 temperature of glycol water for our demands temperature.Under the conditions of realizing that realization is extremely trembled with fear
The measurement of high-tension insulator edge flashing experiment；
Step 3 opens the first water pump 901 and the second water pump 1901, and glycol water is constantly inputted hollow electrode
In, the high-pressure side to flashover insulator 24 and low-pressure end cooling monitor the second in high temperature fluid case 9 and cryogen case 19 in real time
The working condition of glycol aqueous temperature and the first water pump 901 and the second water pump 1901, waits for the electrode temperature of flashover insulator 24
After stabilization, voltage is applied to 24 both ends of flashover insulator using automatic boosting method, digital high voltage number table 31 is used in combination to monitor in real time
The voltage at 24 both ends of flashover insulator；
Step 4, etc. after 24 flashover of flashovers insulator, measure and record flashover voltage, high voltage power supply 29 is reduced to zero immediately；
Step 5 closes the first cryogenic refrigeration equipment 10, the second cryogenic refrigeration equipment 20, the first water pump 901, second successively
Water pump 1901；
Step 6 carries out discharge treatment to RC divider 30；
Step 7, after the temperature at 24 both ends of flashover insulator and hollow electrode 5 reverts to room temperature, dismantle closed air chamber 1,
It observes on 24 surface of fault location flashover insulator due to the trace that flashover discharges and generates, and takes pictures, determine edge flashing
In fault location；
Step 8, the trace for disposing flashover insulator surface, then wiped with absolute ethyl alcohol, then step is arrived step 1 is repeated
Rapid 7, it is tested next time.
Such as Fig. 4, whether it is the temperature needed that the automatic boosting method is according to the high-pressure side and low-pressure end of flashover insulator 24
Degree, if the temperature of the high-pressure side of flashover insulator 24 and low-pressure end is not required temperature, adjust external transformer stop to
The both ends of flashover insulator 24 are pressurizeed, and when the high-pressure side of flashover insulator 24 and low-pressure end are to need temperature, are adjusted external
Transformer pressurizes to the high-pressure side and low-pressure end of flashover insulator 24, judges whether flashover insulator 24 occurs flashover, if flashover
The not flashover of insulator 24, then continue the high-pressure side of flashover insulator 24 and the temperature of low-pressure end.
Operation principle：The present invention establishes closed air chamber 1, and installs the first low temperature by the lateral wall in hollow electrode 5
Refrigeration equipment 10 and cylinder 22 lateral wall install the second cryogenic refrigeration equipment 20, by being mounted on the first cryogenic refrigeration equipment
10 and the second high temperature fluid case 9 and cryogen case 19 in cryogenic refrigeration equipment 20 fluid glycol water is added
Heat, makes it through the first temperature sensor 902 and second temperature sensor 1902 reaches preset temperature, opens the first water at this time
Pump 901 and the second water pump 902, freeze to the low-pressure end of flashover insulator 24, after flashover 24 flashover of insulator, record sheet
Flashover voltage, and the voltage of the high-pressure side of flashover insulator 24 and low-pressure end is reduced to zero, it simultaneously closes off the first cryogenic refrigeration and sets
Standby 10, second cryogenic refrigeration equipment 20, the first water pump 901 and the second water pump 1901, then utilize RC divider 30 to flashover
Insulator 24 carries out discharge treatment, and the temperature of the high-pressure side and low-pressure end and hollow electrode 5 that wait for flashover insulator 24 reverts to often
Wen Hou dismantles closed air chamber 1, observes on 24 surface of fault location flashover insulator due to the trace that flashover discharges and generates, and clap
According to determining that edge flashing is happened at fault location.
Claims (4)
1. it is a kind of it is extremely cold under the conditions of high-tension insulator edge flashing experimental provision, it is characterised in that：The device includes closed air chamber
(1), the first conducting rod (3) and grading ring (4), protective resistance (28), high voltage power supply (29), measuring device (a), the first low temperature system
Cool equipment (10), the second cryogenic refrigeration equipment (20), RC divider (30) and high-voltage digital voltmeter (31), the high-voltage electricity
The one end in source (29) is grounded, and the other end is sequentially connected protective resistance (28) and grading ring (4), the high-pressure side of RC divider (30)
Grading ring (4) is connected, ground terminal is grounded, and output end connects high-voltage digital voltmeter (31)；
The side wall of the closed air chamber (1) is hollow cylindrical tube (11), is riveted at the lower ending opening of the hollow cylindrical tube (11)
There is bottom cover plate (13), and bottom cover plate (13) is grounded, fixing seal has sealing at the upper port of the hollow cylindrical tube (11)
Insulator (2), through being plugged with the first conducting rod (3), first conducting rod (3) at the center of the sealing insulator (2)
Top be socketed with grading ring (4),
The measuring device (a) includes hollow electrode (5), the first grading shield (6), high-tension insulator (24), cryogen cycle
Cylinder (22), the second grading shield (25), the second conducting rod (26) and third grading shield (27), the top of the hollow electrode (5)
Be spirally connected the first conducting rod (3), and the bottom end of the hollow electrode (5) is installed with the first grading shield (6), the first grading shield (6)
Lower end fit closely the upper surface of high-pressure side in the middle part of high-tension insulator (24), the low-pressure end of high-tension insulator (24) is fixedly connected
On the inner wall of cylinder (22), the lower surface of high-pressure side is sequentially connected the second grading shield (25), the in the middle part of high-tension insulator (24)
Two conducting rods (26) and third grading shield (27)；
The bottom end of the cylinder (22) is bolted with supporting rod (21), the upper table of the lower end welding bottom cover plate (13) of supporting rod (21)
Face, the junction of the cylinder (22) and high-tension insulator (24) low-pressure end are spirally connected round cavity ring (23), and in the junction
Round cavity ring (23) outer wall on be plugged with cryogen inlet pipe (17) and cryogen outlet pipe (18), the cryogen
The end of inlet pipe (17) and cryogen outlet pipe (18) is connect across bottom cover plate (13) with the second cryogenic refrigeration equipment (20)；
Two screw holes up and down are offered on the outer wall of the hollow electrode (5), are bolted with high temperature fluid inlet pipe (7) and high temperature respectively
Fluid outlet pipe (8), the side wall of the hollow cylindrical tube (11) are equipped with an opening, the opening by grafting seal cover board (12) into
Row seals, and is opened up on the seal cover board (12) and exports through-hole, the high temperature fluid inlet pipe (7) and high temperature fluid there are two horizontal
Outlet pipe (8) exports respective end, the high temperature fluid inlet pipe (7) and high temperature fluid outlet pipe by two export through-holes respectively
(8) end is connect with the first cryogenic refrigeration equipment (10)；
Air-filled pore (14) is offered on the bottom cover plate (13), and gas tube (15) is plugged in hole；
The inner wall of the first cryogenic refrigeration equipment (10) is installed with high temperature fluid case (9), high temperature fluid case (9) packet
The first water pump (901) and the first temperature sensor (902) are included, and the first water pump (901) is fixedly connected with high temperature fluid inlet pipe (7),
First temperature sensor (902) is fixedly connected with high temperature fluid outlet pipe (8)；
The inner wall of the second cryogenic refrigeration equipment (20) is installed with cryogen case (19), the cryogen case (19)
Including the second water pump (1901) and second temperature sensor (1902), and the second water pump (1901) is fixedly connected with cryogen inlet pipe
(17), second temperature sensor (1902) is fixedly connected with cryogen outlet pipe (18)；
Fluid in the high temperature fluid case (9) and cryogen case (19) is the mixed liquor of deionized water and ethylene glycol.
2. it is according to claim 1 it is a kind of it is extremely cold under the conditions of high-tension insulator edge flashing experimental provision, which is characterized in that
The lateral wall of the gas tube (15) is installed with valve (16).
3. it is a kind of it is extremely cold under the conditions of high-tension insulator edge flashing experimental method, using a kind of extremely cold item described in claim 1
High-tension insulator edge flashing experimental provision is realized under part, which is characterized in that the method includes：
Step 1, by the evacuating air in closed air chamber (1), and be filled with the gas with certain pressure into closed air chamber (1)
Body, while the structure in closed air chamber (1) is installed, make hollow electrode (5) and high temperature fluid inlet pipe (7) and high temperature fluid outlet pipe
(8) it is connected, and high-tension insulator (24) is bonded cylinder (22) inner wall, and plus influence insulator on high-tension insulator (24)
The defect factors of flashover voltage；
High temperature fluid case (9) is respectively set in the first cryogenic refrigeration equipment (10) and the second cryogenic refrigeration equipment (20) in step 2
With the temperature of cryogen case (19), after setting, refrigeration mode is opened, to high temperature fluid case (9) and cryogen case (19)
Interior glycol water freezes, while respectively with the first temperature sensor (902) and second temperature sensor (1902)
The temperature in high temperature fluid case (9) and cryogen case (19) is monitored, when temperature is higher than preset value, the first temperature sensor
(902) and second temperature sensor (1902) sends out cooling signals, when temperature reaches preset value, the first temperature sensor
(902) and temperature signal is passed to the first cryogenic refrigeration equipment (10) and the second low temperature by second temperature sensor (1902) respectively
Refrigeration equipment (20) so that high temperature fluid case (9) and cryogen case (19) stop refrigeration；
Step 3 opens the first water pump (901) and the second water pump (1901), and glycol water is constantly inputted hollow electrode
(5) in, the high-pressure side to high-tension insulator (24) and low-pressure end cooling, after the electrode temperature of high-tension insulator (24) is stablized,
Voltage is applied to high-tension insulator (24) both ends using automatic boosting method, high-voltage digital table (31) is used in combination to monitor high-voltage isulation in real time
The voltage at sub (24) both ends；
Step 4, etc. after high-tension insulators (24) flashover, measure and record flashover voltage, high voltage power supply (29) is reduced to zero immediately；
Step 5 closes the first cryogenic refrigeration equipment (10), the second cryogenic refrigeration equipment (20), the first water pump (901), successively
Two water pumps (1901)；
Step 6 carries out discharge treatment to RC divider (30)；
Step 7, after the temperature at high-tension insulator (24) both ends and hollow electrode (5) reverts to room temperature, dismantle closed air chamber
(1), the trace that observation is generated on fault location high-tension insulator (24) surface due to flashover electric discharge, and take pictures, it determines and is dodged along face
Network is happened at fault location；
Step 8, the trace for disposing high-tension insulator (24) surface, then wiped with absolute ethyl alcohol, then repeatedly step 1 arrives step
7, it is tested next time.
4. it is according to claim 3 it is a kind of it is extremely cold under the conditions of high-tension insulator edge flashing experimental method, which is characterized in that
Whether it is the temperature needed that the automatic boosting method is according to the high-pressure side and low-pressure end of high-tension insulator (24), if high-voltage isulation
The high-pressure side of sub (24) and the temperature of low-pressure end are not required temperature, adjust external transformer and stop to high-tension insulator
(24) both ends pressurization adjusts external transformer when the high-pressure side of high-tension insulator (24) and low-pressure end are to need temperature
High-pressure side to high-tension insulator (24) and low-pressure end pressurization, judge whether high-tension insulator (24) occurs flashover, if high pressure is exhausted
Edge (24) not flashover, then continue the temperature of the high-pressure side and low-pressure end of high-tension insulator (24).
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109164361A (en) * | 2018-09-21 | 2019-01-08 | 国网辽宁省电力有限公司沈阳供电公司 | It is a kind of based on the alternating-current voltage resistance test device used under extreme condition and method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10188699A (en) * | 1996-12-26 | 1998-07-21 | Nissin Electric Co Ltd | Insulator contamination monitoring device |
| CN102645618A (en) * | 2012-04-16 | 2012-08-22 | 浙江清科电力科技有限公司 | Intelligent detection method and detection system device for contaminated insulator |
| CN103913682A (en) * | 2014-03-28 | 2014-07-09 | 重庆大学 | Insulating gas insulating performance experiment system and method thereof applied to electrical equipment |
| CN104764982A (en) * | 2014-12-01 | 2015-07-08 | 吉林省电力科学研究院有限公司 | Device for insulating material surface flashover experiment and using method thereof |
| CN106033104A (en) * | 2016-05-10 | 2016-10-19 | 华北电力大学 | Low-temperature-environment high-voltage test device for 10-kV insulators |
| CN106370989A (en) * | 2016-11-08 | 2017-02-01 | 国网江苏省电力公司电力科学研究院 | Insulator flashover test temperature control device and use method |
| CN106841960A (en) * | 2017-04-07 | 2017-06-13 | 金陵科技学院 | Method and device for analyzing the temperature difference and insulator arc-over characteristic relation |
| CN208314123U (en) * | 2018-06-05 | 2019-01-01 | 沈阳工业大学 | It is a kind of it is extremely cold under the conditions of high-tension insulator edge flashing experimental provision |
-
2018
- 2018-06-05 CN CN201810569207.9A patent/CN108519545B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10188699A (en) * | 1996-12-26 | 1998-07-21 | Nissin Electric Co Ltd | Insulator contamination monitoring device |
| CN102645618A (en) * | 2012-04-16 | 2012-08-22 | 浙江清科电力科技有限公司 | Intelligent detection method and detection system device for contaminated insulator |
| CN103913682A (en) * | 2014-03-28 | 2014-07-09 | 重庆大学 | Insulating gas insulating performance experiment system and method thereof applied to electrical equipment |
| CN104764982A (en) * | 2014-12-01 | 2015-07-08 | 吉林省电力科学研究院有限公司 | Device for insulating material surface flashover experiment and using method thereof |
| CN106033104A (en) * | 2016-05-10 | 2016-10-19 | 华北电力大学 | Low-temperature-environment high-voltage test device for 10-kV insulators |
| CN106370989A (en) * | 2016-11-08 | 2017-02-01 | 国网江苏省电力公司电力科学研究院 | Insulator flashover test temperature control device and use method |
| CN106841960A (en) * | 2017-04-07 | 2017-06-13 | 金陵科技学院 | Method and device for analyzing the temperature difference and insulator arc-over characteristic relation |
| CN208314123U (en) * | 2018-06-05 | 2019-01-01 | 沈阳工业大学 | It is a kind of it is extremely cold under the conditions of high-tension insulator edge flashing experimental provision |
Non-Patent Citations (2)
| Title |
|---|
| 杨明智等: "SF6/CF4混合气体中聚四氟乙烯绝缘表面直流闪络特性" * |
| 隋恒等: "一起封闭式组合电器内部闪络故障" * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109164361B (en) * | 2018-09-21 | 2020-11-03 | 国网辽宁省电力有限公司沈阳供电公司 | Alternating current withstand voltage test device and method used under extreme conditions |
| CN109164361A (en) * | 2018-09-21 | 2019-01-08 | 国网辽宁省电力有限公司沈阳供电公司 | It is a kind of based on the alternating-current voltage resistance test device used under extreme condition and method |
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| CN112763856A (en) * | 2019-11-01 | 2021-05-07 | 清华大学 | Comprehensive evaluation method for gas-solid interface characteristics of insulating material |
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| CN110763968A (en) * | 2019-12-06 | 2020-02-07 | 哈尔滨理工大学 | Full-angle visual gas breakdown testing system |
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