CN108957254A - Insulator surface flashover characteristics experimental provision and method under a kind of electric heating Composite Field - Google Patents
Insulator surface flashover characteristics experimental provision and method under a kind of electric heating Composite Field Download PDFInfo
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- CN108957254A CN108957254A CN201810569209.8A CN201810569209A CN108957254A CN 108957254 A CN108957254 A CN 108957254A CN 201810569209 A CN201810569209 A CN 201810569209A CN 108957254 A CN108957254 A CN 108957254A
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- 239000012212 insulator Substances 0.000 title claims abstract description 119
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000002131 composite material Substances 0.000 title claims abstract description 22
- 238000005485 electric heating Methods 0.000 title claims abstract description 22
- 230000005611 electricity Effects 0.000 claims abstract description 37
- 239000000446 fuel Substances 0.000 claims abstract description 36
- 238000010438 heat treatment Methods 0.000 claims abstract description 36
- 238000002474 experimental method Methods 0.000 claims abstract description 14
- 230000001681 protective effect Effects 0.000 claims abstract description 11
- 239000012530 fluid Substances 0.000 claims description 35
- 230000007246 mechanism Effects 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 18
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 6
- 238000004064 recycling Methods 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 230000004913 activation Effects 0.000 claims description 3
- 230000006837 decompression Effects 0.000 claims description 3
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 3
- VMQPMGHYRISRHO-UHFFFAOYSA-N benzvalene Chemical group C1=CC2C3C1C32 VMQPMGHYRISRHO-UHFFFAOYSA-N 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 2
- 239000004417 polycarbonate Substances 0.000 description 6
- 238000009413 insulation Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920000515 polycarbonate Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 241000233855 Orchidaceae Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000013028 medium composition Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Nonlinear Science (AREA)
- Insulators (AREA)
Abstract
Insulator surface flashover characteristics experimental provision and method under a kind of electric heating Composite Field, belong to high voltage installation experimental technique field.The device includes closed air chamber, bushing, grading ring, protective resistance, RC divider, high voltage power supply, second divided voltage case and oscillograph; the present invention controls oil temperature using multiple temperature sensors; and the output power of automatic control heating device and oil pump; guarantee that the high-voltage electricity of the oil and disc insulator in fuel reserve tank is extreme and low tension extremely reaches the temperature that we need; avoid operation with high pressure bring dangerous; the present invention can increase experiment condition, there is certain versatility.
Description
Technical field
The present invention relates to high voltage installation experimental technique field, in particular to insulator is dodged along face under a kind of electric heating Composite Field
Network characteristic experimental apparatus and method.
Background technique
GIS/GIL equipment is applied since the 1960s and 1970s and is 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 prospect.However GIS/GIL belong to it is 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 inside GIS/GIL at gas-solid interface first；With pressurization width
It is worth the raising with the time, the creeping discharge on gas-solid interface may develop the breakdown for 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.
Under different loads, the GIS centre pilot current-carrying heating of normal operation causes gas and insulator temperature non-
Even distribution forms 30 DEG C or so temperature differences between guide rod and shell, and increases and increase with electric current.When GIS high pressure guide rod and shell
Between there are when temperature gradient, insulator will be moved along face maximum field intensity position to the lower side of temperature, and temperature
Higher insulator edge flashing voltage is lower.The temperature that temperature inside GIS/GIL equipment will lead to insulator surface changes
Become, so that the volume conductance of insulator, surface conductivity and dielectric constant be made to change, further influences insulator
Insulation performance causes insulator that edge flashing occurs.Temperature distributing characteristic when therefore, based on equipment operation, studies insulator electric field
The regularity of distribution probes into insulator surface flashover characteristics under electric heating Composite Field and is of great significance, while being also current urgent need to resolve
One of key subject, meet the growth requirement of high pressure GIS/GIL.
There are many shortcomings, current most of insulator edges for disc insulator surface flashover characteristics experimental provision at present
There is no temperature control system in the flashover property experimental provision of face, it cannot be to disc insulator edge flashing mechanism under electric heating Composite Field
It is studied, the research of the disc insulator edge flashing mechanism under normal temperature, and insulator edge flashing can only be carried out
Power Level is inadequate in characteristic experimental apparatus, not can be carried out grinding for the disc insulator edge flashing mechanism in the case of extra-high voltage
Study carefully.Some has only one temperature sensor of the insulator surface flashover characteristics experimental provision of temperature control system at present, no
It can accurately obtain the true temperature at insulator both ends.Current most of insulator surface flashover characteristics experimental provisions not can increase
Experiment condition does not have certain versatility.
Summary of the invention
Of the existing technology in order to solve the problems, such as, the present invention controls oil temperature using multiple temperature sensors, and controls automatically
The output power of refrigerating/heating apparatus and oil pump guarantees that oil and disc insulator both ends in fuel reserve tank reach the temperature of our needs
Degree avoids operation with high pressure bring dangerous, and present invention may apply to the disc insulators under the conditions of super-pressure even extra-high voltage
Flashover experiment is able to carry out the research of the disc insulator edge flashing mechanism under the conditions of super-pressure even extra-high voltage.And it can
To realize the flashover experiment under the conditions of different air pressures, gas componant, including the flashover test under the new gas such as environmentally friendly gas, and
And the present invention is in being suitable for the multiple voltages condition such as alternating current and direct current, impact, and flashover electric(al) insulator model can increase experiment
Condition, such as roughness, surface characteristic, metal particle etc. have certain versatility.
The present invention provides insulator surface flashover characteristics experimental provision under a kind of electric heating Composite Field, which includes closing
Gas chamber, bushing, grading ring, protective resistance, RC divider, high voltage power supply, second divided voltage case and oscillograph, the high pressure
The high-voltage end of guide rod is electrically connected the high-voltage end of protective resistance and RC divider, the other end of the protective resistance in casing
It is electrically connected the high-voltage end of high voltage power supply, and the low-pressure end ground connection of high voltage power supply, the low-pressure end ground connection of the RC divider is described
The input terminal of the data output end electrical connection second divided voltage case of RC divider, the output end electrical connection of the second divided voltage case are shown
Wave device；
The closed air chamber includes ball-type pedestal and sealing bucket, and the ball-type pedestal and the junction for sealing bucket are bolted with method
Orchid, the top of the ball-type pedestal are plugged with the low-pressure end of bushing, and the top high-voltage end cap of the bushing is connected to
Pressure ring, the low-pressure end of guide rod is fixedly installed with high voltage bus in the bushing, and the end of high voltage bus is fixedly installed with
The right side wall of first grading shield, first grading shield fits closely the right-hand end of high-field electrode at disc insulator center, and
The low tension of disc insulator extremely passes through flange and connect with sealing bucket, and at the disc insulator center left side of high-field electrode
End is closely fitted with the second grading shield, and the left side wall of second grading shield is bolted with horizontal positioned hollow electrode, it is described in
The other end of empty electrode is fixedly installed with third grading shield, is successively bolted with high temperature fluid inlet pipe on the outer wall of the hollow electrode
With high temperature fluid outlet pipe, the end of the high temperature fluid inlet pipe and high temperature fluid outlet pipe is communicated with high temperature fuel reserve tank, the sealing
The bucket junction extreme with disc insulator low tension is bolted with hollow oil circulation device, and the hollow oil circulation in the junction
It is plugged with cryogen inlet pipe and cryogen outlet pipe on the outer wall of device, the cryogen inlet pipe and cryogen outlet pipe
End is communicated with low-temperature reservoir case；
The high temperature fuel reserve tank includes cabinet and the intracorporal first heater of case, the first oil pump, the first temperature sensor
And second temperature sensor, first oil pump connect high temperature fluid inlet pipe, the second temperature sensor connects cryogen
Outlet pipe, the first heater, the first oil pump, the first temperature sensor and second temperature sensor are electrically connected by control line
Connect the first temperature control equipment；
The low-temperature reservoir case includes cabinet and the intracorporal secondary heating mechanism of case, the second oil pump, third temperature sensor
With the 4th temperature sensor, second oil pump connects cryogen inlet pipe, and the 4th temperature sensor connects cryogen
Outlet pipe, the secondary heating mechanism, the second oil pump, third temperature sensor and the 4th temperature sensor are electrically connected by control line
Connect second temperature control device.
The number of the grading ring is 2, and two grading rings are connected in series.
The hollow oil circulation device is a hollow ring being socketed in flange.
First temperature control equipment and second temperature control device are all made of temperature controller, and first heater
It is made of the heater strip that thermal resistance is constituted with secondary heating mechanism.
The experimental method of insulator surface flashover characteristics experimental provision, the method packet under a kind of electric heating Composite Field
It includes:
Step 1 installs structure in closed air chamber, by the evacuating air in closed air chamber, and into closed air chamber
It is filled with the gas with certain pressure, while high voltage power supply being connected by protection electricity group with the high-voltage end of bushing, will be hindered
The high-voltage end for holding divider is connected with the high-voltage end of bushing, RC divider low-pressure end ground connection, the data of RC divider
Output end is connected with second divided voltage case, will be input in oscillograph by the signal of second divided voltage case decompression；
Step 2 on disc insulator plus will influence the factor of disc insulator flashover property, and in high temperature fluid inlet pipe and
The end of high temperature fluid outlet pipe is connected to high temperature fuel reserve tank, and is connected to low temperature with the end of cryogen outlet pipe in cryogen inlet pipe
Fuel reserve tank；
High temperature fuel reserve tank and low-temperature reservoir is arranged in step 3 on the first temperature control equipment and second temperature control device
The permitted maximum difference of temperature and temperature in case, then controls the first temperature control equipment first in high temperature fuel reserve tank
Oil preheated, control second temperature control device the oil in low-temperature reservoir case is preheated, by high temperature fuel reserve tank
The temperature of setting is heated to the oil in low-temperature reservoir case, the first temperature control equipment and the second temperature if temperature reaches requirement
It spends control device and issues and stop heating signal, if temperature is lower than the temperature value being arranged, the first temperature control equipment and second
Temperature control equipment can then issue and begin to warm up signal；
Step 4, when reach setting temperature when, the first temperature control equipment and second temperature control device control open first
Oil pump and the second oil pump do not input the oil heated in hollow electrode, to the high-voltage electricity of disc insulator is extreme and low pressure
Electrode tip heating, and the first temperature sensor and second temperature sensor are respectively intended to the oil of acquisition the first oil pump output oil at this time
The recycling oil temperature of mild high temperature fluid outlet pipe, and third temperature sensor and the 4th temperature sensor are respectively intended to the second oil of acquisition
The oil temperature of pump output oil and the recycling oil temperature of cryogen outlet pipe, make the first temperature control equipment and second temperature control device point
The output power for not adjusting the first oil pump and the second oil pump, the high-voltage electricity to disc insulator is extreme and low tension extreme temperature is steady
After fixed, oscillograph is opened, triggering edge and activation threshold value are set, and use automatic boosting method, to the high pressure of disc insulator
Electrode tip and low tension generator terminal apply voltage and press trigger button on oscillograph when flashover will occur for disc insulator；
Step 5, etc. after disc insulators flashover, flashover voltage and flashover waveform are recorded by oscillograph；
Step 6, after the voltage of high voltage power supply is reduced to 0kV, user is with earth brace to high voltage power supply and RC divider
It discharges, then successively closes first heater, the first oil pump, secondary heating mechanism, the second oil pump, the control of the first temperature
Device and second temperature control device；
Step 7 successively removes hollow oil circulation device, high temperature fluid inlet pipe, high temperature fluid outlet pipe and sealing bucket, observes and exists
The surface of fault location disc insulator is taken pictures due to the trace that flashover discharges and generates, and determines that edge flashing occurs in defect
Place；
Step 8, the trace for disposing disc insulator surface, and wiped with dehydrated alcohol, then repeatedly step to step,
It is tested next time.
As shown in figure 4, the temperature control process of first temperature control equipment is by the first temperature sensor and the second temperature
Sensor is spent to acquire the temperature of high temperature fuel reserve tank, while judging whether the temperature of acquisition is lower than minimum set temperature value, if
Lower than minimum set temperature value, the difference between minimum set temperature value and collecting temperature value need to be calculated, and according to the difference of calculating
It controls the first temperature control equipment and issues suitable heating power signal, if collected temperature is higher than minimum set temperature
Value, then need to judge whether collected temperature is greater than highest temperature settings, if being higher than highest temperature settings, needs
Conjunction is issued by calculating the difference for the temperature that highest is arranged between temperature value and collecting temperature value to control the first temperature control equipment
Suitable heating power signal, then looped to determine, when collected temperature value is exactly in minimum set temperature value and highest
It is arranged between temperature value, then needs to calculate the temperature of the first temperature sensor and second temperature sensor to acquire high temperature fuel reserve tank
Difference makes the first temperature control equipment control the output power of the first oil pump, exports simultaneously, realize temperature control with this according to difference,
The temperature control process of the second temperature control device is same as above.
As shown in figure 5, the high-voltage electricity for adjusting disc insulator by the way of automatic boosting method is extreme and low-field electrode
The voltage at end, the automatic boosting method are that the high-voltage electricity of disc insulator is extreme and whether low tension is extremely needs by measuring
Temperature, if the high-voltage electricity of disc insulator extremely and the extreme temperature of low tension is not required temperature, adjusts external change
Depressor stops extremely extremely pressurizeing with low tension to the high-voltage electricity of disc insulator, when the high-voltage electricity of disc insulator is extremely and low
Piezoelectricity is extremely to adjust that external transformer is extreme to the high-voltage electricity of disc insulator and low tension extremely adds when needing temperature
Pressure, and trigger button is pressed on oscillograph.Judge whether disc insulator occurs flashover, if disc insulator not flashover, after
The temperature that the high-voltage electricity of continuous measurement disc insulator is extreme and low tension is extreme is adjusted when flashover will occur for disc insulator
The voltage of high voltage power supply is reduced to 0kV by transformer.
The utility model has the advantages that the present invention is extreme to the high-voltage electricity of disc insulator by the way of oil bath and low tension extremely carries out
It heats to realize the variation of temperature gradient, the heat condition under various operating conditions when Practical Project operation is simulated with this.And benefit
It ensure that absolutely with the mode of oil bath heating with the effect of insulation, and when fluid is flowed through from high pressure hollow electrode
Edge, other facilities such as protection oil pump.And the present invention controls oil temperature using multiple temperature sensors, and automatically controls heating dress
The output power with oil pump is set, guarantees that the high-voltage electricity of the oil and disc insulator in fuel reserve tank is extreme and low tension extremely reaches me
The temperature that needs, avoid operation with high pressure bring dangerous, present invention may apply to the super-pressure even basins of extra-high voltage condition
The experiment of formula insulator arc-over, is able to carry out the research of the disc insulator edge flashing mechanism in the case of super-pressure.And it can be with
Realize the flashover experiment under the conditions of different air pressures, gas componant, including the flashover test under the new gas such as environmentally friendly gas, and
The present invention is in being suitable for the multiple voltages condition such as alternating current and direct current, impact, and flashover electric(al) insulator model can increase experiment item
Part, such as roughness, surface characteristic, metal particle etc. have certain versatility.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of insulator surface flashover characteristics experimental provision under electric heating Composite Field of the invention；
Fig. 2 is the enlarged drawing in Fig. 1 of the invention at a；
Fig. 3 is the hollow oil circulation device of insulator surface flashover characteristics experimental provision under electric heating Composite Field of the invention
Oily flow schematic diagram；
Fig. 4 is the temperature control flow chart that insulator surface flashover characteristics are tested under electric heating Composite Field of the invention；
Fig. 5 is the pressure regulation of the automatic boosting method of insulator surface flashover characteristics experimental provision under electric heating Composite Field of the invention
Flow chart.
In figure: 1, closed air chamber, 2, ball-type pedestal, 3, sealing bucket, 4, flange, 5, bushing, 6, grading ring, 7, high pressure
Bus, the 8, first grading shield, 9, disc insulator, the 10, second grading shield, 11, hollow electrode, 12, third grading shield, 13, in
Empty oil circulation device, 14, high temperature fluid inlet pipe, 15, high temperature fluid outlet pipe, 16, high temperature fuel reserve tank, 1601, first heater,
1602, the first oil pump, the 1603, first temperature sensor, 1604, second temperature sensor, the 17, first temperature control equipment, 18,
Cryogen inlet pipe, 19, cryogen outlet pipe, 20, low-temperature reservoir case, 2001, secondary heating mechanism, the 2002, second oil pump,
2003, third temperature sensor, the 2004, the 4th temperature sensor, 21, second temperature control device, 22, protective resistance, 23, height
Voltage source, 24, RC divider, 25, second divided voltage case, 26, oscillograph.
Specific embodiment
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 insulator surface flashover characteristics experimental provision under a kind of electric heating Composite Field, the device packets
Include closed air chamber 1, bushing 5, grading ring 6, protective resistance 22, RC divider 24, high voltage power supply 23, second divided voltage case 25
With oscillograph 26, the grading ring 6 is the high-voltage end of guide rod in the bushing 5 in order to make the more uniform of field distribution
It is electrically connected the high-voltage end of protective resistance 22 and RC divider 24, the other end of the protective resistance 22 is electrically connected high-voltage electricity
The high-voltage end in source 23, and the low-pressure end ground connection of high voltage power supply 23, the low-pressure end ground connection of the RC divider 24, the capacitance-resistance point
The input terminal of the data output end electrical connection second divided voltage case 25 of depressor 24, the output end electrical connection of the second divided voltage case 25 are shown
Wave device 26；
Such as Fig. 2, the closed air chamber 1 includes ball-type pedestal 2 and sealing bucket 3, and closed air chamber 1 is able to bear us and tests
The junction of the air pressure of demand, the ball-type pedestal 2 and sealing bucket 3 is bolted with flange 4, the top grafting of the ball-type pedestal 2
There is the low-pressure end of bushing 5, the top high-voltage end cap of the bushing 5 is connected to grading ring 6, leads in the bushing 5
The low-pressure end of bar is fixedly installed with high voltage bus 7, and the end of high voltage bus 7 is fixedly installed with the first grading shield 8, and described first
The right side wall of grading shield 8 fits closely the right-hand end of high-field electrode at 9 center of disc insulator, and the low pressure of disc insulator 9
Electrode tip is connect by flange 4 with sealing bucket 3, and the left-hand end of high-field electrode is closely fitted at 9 center of disc insulator
Second grading shield 10, the left side wall of second grading shield 10 are bolted with horizontal positioned hollow electrode 11, the hollow electrode
11 other end is fixedly installed with third grading shield 12, is successively bolted with high temperature fluid inlet pipe on the outer wall of the hollow electrode 11
14 and high temperature fluid outlet pipe 15, and high temperature fluid inlet pipe 14 and high temperature fluid outlet pipe 15 are the hard tube of PTFE material, and use rock
Cotton package ensure that oil body heat preservation and insulating properties, and select PTFE that can guarantee that high-field electrode and the outer wall for sealing bucket 3 are exhausted
Edge, and can guarantee vacuumize or tank body in high pressure when oil pipe it is indeformable.It is able to bear -60 DEG C~+260 DEG C of temperature, institute
The end for stating high temperature fluid inlet pipe 14 and high temperature fluid outlet pipe 15 is communicated with high temperature fuel reserve tank 16, and the high temperature fuel reserve tank 16 works
Temperature at 20~100 DEG C, and high temperature fuel reserve tank 16 use polycarbonate PC plastic, polycarbonate PC plastic have convenient in carrying,
Easy processing, feature resistant to high temperature, the high temperature fuel reserve tank 16 are mounted on outside tank body, ensure that 1601 pairs of realities of first heater
The influence for testing result reaches minimum, and the sealing bucket 3 junction extreme with 9 low tension of disc insulator is bolted with hollow oil and follows
Loop device 13, as shown in figure 3, and being plugged with cryogen inlet pipe 18 on the outer wall of the hollow oil circulation device 13 of the junction
With cryogen outlet pipe 19, the cryogen inlet pipe 18 and cryogen outlet pipe 19 are equally the hard tube of PTFE material, and
And can bend in a certain range, the end of the cryogen inlet pipe 18 and cryogen outlet pipe 19 is communicated with low-temperature reservoir
Case 20, low-temperature reservoir case 20 equally use polycarbonate PC plastic；
The high temperature fuel reserve tank 16 includes cabinet and the intracorporal first heater 1601 of case, the first oil pump 1602, first
Temperature sensor 1603 and second temperature sensor 1604, first oil pump 1602 connect high temperature fluid inlet pipe 14, and described the
Two temperature sensors 1604 connect cryogen outlet pipe 15, the first heater 1601, the first oil pump 1602, the first temperature
Sensor 1603 and second temperature sensor 1604 pass through control line and are electrically connected the first temperature control equipment 17, and the first temperature
Control device 17 is located at the outside of closed air chamber 1, convenient for operation and control；
The low-temperature reservoir case 20 includes cabinet and the intracorporal secondary heating mechanism 2001 of case, the second oil pump 2002, third
Temperature sensor 2003 and the 4th temperature sensor 2004, second oil pump 2002 connect cryogen inlet pipe 18, and described the
Four temperature sensors 2004 connect cryogen outlet pipe 19, the secondary heating mechanism 2001, the second oil pump 2002, third temperature
Sensor 2003 and the 4th temperature sensor 2004 pass through control line and are electrically connected second temperature control device 21, and second temperature
Control device 21 is located at the outside of closed air chamber 1, convenient for operation and control.
In order to make electric field charge amount distribution it is more uniform, the number of the grading ring 6 is 2, and two grading rings 6
It is connected in series.
The hollow oil circulation device 13 is a hollow ring being socketed at flange 4, and the circular hollow annulus is
For promoting the oil body in low-temperature reservoir case 20 to flow.
First temperature control equipment 17 and second temperature control device 21 are all made of temperature controller, and the first heating
Device 1601 and secondary heating mechanism 2001 are made of the heater strip that thermal resistance is constituted, and effect is for ensureing heating oil
Temperature, first temperature sensor 1603, second temperature sensor 1604, third temperature sensor 2003 and the 4th temperature
Sensor 2004 mainly be made of thermistor, material is mainly metal oxide ceramic, be low cost, sensitivity it is highest
Temperature sensor, has many advantages, such as small in size, and the response time is fast, and the first temperature sensor 1603, second temperature sensor
1604, third temperature sensor 2003, the 4th temperature sensor 2004 temperature-measuring range be -50 to 200 degree or so, and first is warm
It spends two between sensor 1603 and second temperature sensor 1604, third temperature sensor 2003 and the 4th temperature sensor 2004
Two-phase is mutually adjusted, and is referred to mutually, to collect 9 high-voltage end of disc insulator really accurate temperature.
The application method of insulator surface flashover characteristics experimental provision, the method packet under a kind of electric heating Composite Field
It includes:
Step 1 installs structure in closed air chamber 1, by the evacuating air in closed air chamber 1, and to closed air chamber 1
In be filled with the gas with certain pressure, for the air-tightness of detection device, at the same by high voltage power supply 23 by protection electricity group 22
It is connected with the high-voltage end of bushing 5, the high-voltage end of RC divider 24 is connected with the high-voltage end of bushing 5, capacitance-resistance point
24 low-pressure end of depressor ground connection, the data output end of RC divider 24 are connected with second divided voltage case 25, will pass through second divided voltage case
The signal of 25 decompressions is input in oscillograph 26；
Step 2, by the evacuating air in room 1 of holding one's breath, and into closed air chamber 1, certain pressure is filled with the reality of certain pressure
Gas is tested, the factor for influencing 9 flashover property of disc insulator will be added on disc insulator 9, and in high temperature fluid inlet pipe 14 and height
The end of warm fluid outlet pipe 15 is connected to high temperature fuel reserve tank 16, and connects in the end of cryogen inlet pipe 18 and cryogen outlet pipe 19
Logical low-temperature reservoir case 20；
High temperature fuel reserve tank 16 and low is arranged in step 3 on the first temperature control equipment 17 and second temperature control device 21
Temperature and the permitted maximum difference of temperature in warm fuel reserve tank 20, the temperature in high temperature fuel reserve tank 16 are 20~100 DEG C,
Temperature in low-temperature reservoir case 20 is 20~40 DEG C, and the permitted maximum difference of temperature 1 is arranged according to the requirement of actual experiment,
Then it controls the first temperature control equipment 17 first to preheat the oil in high temperature fuel reserve tank 16, control second temperature control dress
It sets 21 to preheat the oil in low-temperature reservoir case 20, the oil in high temperature fuel reserve tank 16 and low-temperature reservoir case 20 is heated to set
The temperature set, the first temperature control equipment 17 and second temperature control device 21, which issue, if temperature reaches requirement stops heating
Signal, if temperature lower than setting temperature value, the first temperature control equipment 17 and second temperature control device 21 if, can be sent out
Signal is begun to warm up out, thus within the temperature range of guaranteeing that temperature oily in fuel reserve tank maintains our demands；
Step 4, when reach setting temperature when, the first temperature control equipment 17 and second temperature control device 21 control open
First oil pump 1602 and the second oil pump 2002 do not input the oil heated in hollow electrode 11, to the height of disc insulator 9
Piezoelectricity is extreme and low tension extremely heats, and the first temperature sensor 1603 and second temperature sensor 1604 are respectively intended at this time
It acquires the first oil pump 1602 and exports the oil temperature of oil and the recycling oil temperature of high temperature fluid outlet pipe 15, and 2003 He of third temperature sensor
4th temperature sensor 2004 is respectively intended to the recycling that the second oil pump 2002 of acquisition exports the oil temperature and cryogen outlet pipe 19 of oil
Oil temperature makes the first temperature control equipment 17 and second temperature control device 21 adjust the first oil pump 1602 and the second oil pump respectively
2002 output power opens oscillograph 26 after the high-voltage electricity of disc insulator 9 is extreme and low tension extreme temperature is stablized,
Triggering edge and activation threshold value are set, and uses automatic boosting method, gives the high-voltage electricity of disc insulator (9) extreme and low tension
Generator terminal applies voltage and presses trigger button on oscillograph 26 when flashover will occur for disc insulator 9；
Step 5, etc. after 9 flashover of disc insulators, flashover voltage and flashover waveform are recorded by oscillograph 26；
Step 6, after the voltage of high voltage power supply 23 is reduced to 0kV, user is with earth brace to high voltage power supply 23 and capacitance-resistance point
Depressor 24 discharges, and then successively closes first heater 1601, the first oil pump 1602, secondary heating mechanism 2001, the
Two oil pumps 2002, the first temperature control equipment 17 and second temperature control device 21；
Step 7 successively removes hollow oil circulation device 13, high temperature fluid inlet pipe 14, high temperature fluid outlet pipe 15 and sealing bucket
3, it observes on the surface of fault location disc insulator 9 due to the trace that flashover discharges and generates, and take pictures, determines that edge flashing is sent out
Life is in fault location, the convincingness of Enhancement test result；
Step 8, the trace for disposing 9 surface of disc insulator, and wiped with dehydrated alcohol, then repeatedly step 1 arrives step
Rapid 7, it is tested next time.
As shown in figure 4, the temperature control process of first temperature control equipment 17 is by 1603 He of the first temperature sensor
Second temperature sensor 1604 acquires the temperature of high temperature fuel reserve tank 16, while judging whether the temperature of acquisition is lower than minimum set
Temperature value need to calculate the difference between minimum set temperature value and collecting temperature value if being lower than minimum set temperature value, and according to
The difference of calculating controls the first temperature control equipment 17 and issues suitable heating power signal, if collected temperature is higher than most
Low setting temperature value then needs to judge whether collected temperature is greater than highest temperature settings, if being higher than highest temperature
Setting value needs the difference by calculating the temperature that highest is arranged between temperature value and collecting temperature value to control the control of the first temperature
Device 17 issues suitable heating power signal, then is looped to determine, when collected temperature value is exactly in minimum set
Between temperature value and highest setting temperature value, then need to calculate the first temperature sensor 1603 and second temperature sensor 1604
The temperature gap for acquiring high temperature fuel reserve tank 16 makes the output of the first temperature control equipment 17 the first oil pump 1602 of control according to difference
Power exports simultaneously, realizes temperature control with this, the temperature control process of the second temperature control device 21 is same as above.
As shown in figure 5, the high-voltage electricity for adjusting disc insulator 9 by the way of automatic boosting method is extreme and low-field electrode
The voltage at end, the automatic boosting method are that the high-voltage electricity of disc insulator 9 is extreme and whether low tension is extremely to need by measuring
The temperature wanted is adjusted external if the temperature that the high-voltage electricity of disc insulator 9 is extreme and low tension is extreme is not required temperature
Transformer stops extremely extremely pressurizeing with low tension to the high-voltage electricity of disc insulator 9, when the high-voltage electricity of disc insulator 9 is extreme
It is extremely to adjust that external transformer is extreme to the high-voltage electricity of disc insulator 9 and low-field electrode with low tension when needing temperature
End pressurization, and trigger button is pressed on oscillograph 26, judge whether disc insulator 9 occurs flashover, if disc insulator 9 is not
Flashover, continue to measure disc insulator 9 high-voltage electricity is extreme and temperature that low tension is extreme, when disc insulator 9 will dodge
When network, transformer is adjusted by the voltage of high voltage power supply 23 and is reduced to 0kV.
Working principle: the present invention establishes closed air chamber 1, and installs high temperature oil storage by the lateral wall in hollow electrode 11
Case 16 and sealing bucket 3 outer bottom install low-temperature reservoir case 20, by being mounted on high temperature fuel reserve tank 16 and low-temperature reservoir case 20
Interior first heater 1501 and secondary heating mechanism 2001 heats oil body, makes it through the first temperature sensor
1603, second temperature sensor 1604, third temperature sensor 2003 and the 4th temperature sensor 2004 reach preset temperature,
The first oil pump 1602 and the second oil pump 2002 are opened at this time, and low tension extreme to the high-voltage electricity of disc insulator 9 extremely carries out
Heating, realizes the variation of temperature gradient, and boost using automatic boosting method, after 9 flashover of disc insulator, benzvalene form is exhausted
The voltage that 9 high-voltage electricity of edge is extreme and low tension is extreme is reduced to zero, and then user is with earth brace to high voltage power supply 23 and capacitance-resistance
Divider 24 discharges, and then successively closes first heater 1601, the first oil pump 1602, secondary heating mechanism 2,001 the
Two oil pumps 2002, the first temperature control equipment 17 and second temperature control device 21, then remove closed air chamber 1, and observation is lacking
The surface of place's disc insulator 9 is fallen into due to the trace that flashover discharges and generates, and is photographed to record.
Claims (7)
1. insulator surface flashover characteristics experimental provision under a kind of electric heating Composite Field, it is characterised in that: the device includes closing gas
Room (1), bushing (5), grading ring (6), protective resistance (22), RC divider (24), high voltage power supply (23), second divided voltage
Case (25) and oscillograph (26), the high-voltage end of guide rod is electrically connected protective resistance (22) and capacitance-resistance in the bushing (5)
The high-voltage end of divider (24), the high-voltage end of other end electrical connection high voltage power supply (23) of the protective resistance (22), and high pressure
The low-pressure end of power supply (23) is grounded, the low-pressure end ground connection of the RC divider (24), the data of the RC divider (24)
Output end is electrically connected the input terminal of second divided voltage case (25), and the output end of the second divided voltage case (25) is electrically connected oscillograph
(26)；
The closed air chamber (1) includes ball-type pedestal (2) and sealing bucket (3), the company of the ball-type pedestal (2) and sealing bucket (3)
The place of connecing is bolted with flange (4), and the top of the ball-type pedestal (2) is plugged with the low-pressure end of bushing (5), the bushing
(5) top high-voltage end cap is connected to grading ring (6), and the low-pressure end of guide rod is fixedly installed with high pressure mother in the bushing (5)
Line (7), and the end of high voltage bus (7) is fixedly installed with the first grading shield (8), the right side wall of first grading shield (8) is tight
The closely connected right-hand end for closing high-field electrode at disc insulator (9) center, and the low tension of disc insulator (9) extremely passes through flange
(4) it is connect with sealing bucket (3), the left-hand end of high-field electrode is closely fitted with second and presses at disc insulator (9) center
It covers (10), the left side wall of second grading shield (10) is bolted with horizontal positioned hollow electrode (11), the hollow electrode
(11) the other end is fixedly installed with third grading shield (12), is successively bolted with high-temperature stream on the outer wall of the hollow electrode (11)
Body inlet pipe (14) and high temperature fluid outlet pipe (15), the high temperature fluid inlet pipe (14) are connected to the end of high temperature fluid outlet pipe (15)
Have high temperature fuel reserve tank (16), sealing bucket (3) junction extreme with disc insulator (9) low tension is bolted with hollow oil and follows
Loop device (13), and it is plugged on the outer wall of the hollow oil circulation device (13) of the junction cryogen inlet pipe (18) and low
The end of warm fluid outlet pipe (19), the cryogen inlet pipe (18) and cryogen outlet pipe (19) is communicated with low-temperature reservoir case
(20)；
The high temperature fuel reserve tank (16) includes cabinet and the intracorporal first heater of case (1601), the first oil pump (1602),
One temperature sensor (1603) and second temperature sensor (1604), first oil pump (1602) connect high temperature fluid inlet pipe
(14), second temperature sensor (1604) connection cryogen outlet pipe (15), the first heater (1601), first
Oil pump (1602), the first temperature sensor (1603) and second temperature sensor (1604) are electrically connected the first temperature by control line
It spends control device (17)；
The low-temperature reservoir case (20) includes cabinet and the intracorporal secondary heating mechanism of case (2001), the second oil pump (2002),
Three-temperature sensor (2003) and the 4th temperature sensor (2004), second oil pump (2002) connect cryogen inlet pipe
(18), the 4th temperature sensor (2004) connection cryogen outlet pipe (19), the secondary heating mechanism (2001), second
Oil pump (2002), third temperature sensor (2003) and the 4th temperature sensor (2004) are electrically connected the second temperature by control line
It spends control device (21).
2. insulator surface flashover characteristics experimental provision under a kind of electric heating Composite Field according to claim 1, feature exist
In the number of the grading ring (6) is 2, and two grading rings (6) are connected in series.
3. insulator surface flashover characteristics experimental provision under a kind of electric heating Composite Field according to claim 1, feature exist
In the hollow oil circulation device (13) is a hollow ring being socketed at flange (4).
4. insulator surface flashover characteristics experimental provision under a kind of electric heating Composite Field according to claim 1, feature exist
In first temperature control equipment (17) and second temperature control device (21) are all made of temperature controller, and the first heating
Device (1601) and secondary heating mechanism (2001) are made of the heater strip that thermal resistance is constituted.
5. insulator surface flashover characteristics experimental method under a kind of electric heating Composite Field, using a kind of electric heating described in claim 1
Insulator surface flashover characteristics experimental provision is realized under Composite Field, which is characterized in that the described method includes:
Step 1 installs structure in closed air chamber (1), by the evacuating air in closed air chamber (1), and to closed air chamber
(1) gas with certain pressure is filled in, while by high voltage power supply (23) by protecting electric group (22) and bushing (5)
High-voltage end is connected, and the high-voltage end of RC divider (24) is connected with the high-voltage end of bushing (5), RC divider (24) is low
Pressure side ground connection, the data output end of RC divider (24) are connected with second divided voltage case (25), will pass through second divided voltage case (25)
The signal of decompression is input in oscillograph (26)；
Step 2 will add the factor for influencing disc insulator (9) flashover property on disc insulator (9), and in high temperature fluid inlet pipe
(14) it is connected to high temperature fuel reserve tank (16) with the end of high temperature fluid outlet pipe (15), and in cryogen inlet pipe (18) and cryogen
The end of outlet pipe (19) is connected to low-temperature reservoir case (20)；
Step 3, on the first temperature control equipment (17) and second temperature control device (21) be arranged high temperature fuel reserve tank (16) and
Temperature and the permitted maximum difference of temperature in low-temperature reservoir case (20), then control the first temperature control equipment (17)
Oil first inner to high temperature fuel reserve tank (16) preheats, and control second temperature control device (21) is inner by low-temperature reservoir case (20)
Oil preheated, by the oil in high temperature fuel reserve tank (16) and low-temperature reservoir case (20) be heated to setting temperature, if warm
Degree reaches requirement, and then the first temperature control equipment (17) and second temperature control device (21) issue stopping heating signal, if warm
When degree is lower than the temperature value being arranged, the first temperature control equipment (17) and second temperature control device (21) can then issue and start to add
Thermal signal；
Step 4, when reach setting temperature when, the first temperature control equipment (17) and second temperature control device (21) control unlatching
The oil heated is not inputted in hollow electrode (11), is insulated to benzvalene form by the first oil pump (1602) and the second oil pump (2002)
The high-voltage electricity of sub (9) is extreme and low tension extremely heats, and the first temperature sensor (1603) and second temperature sensor at this time
(1604) it is respectively intended to the oil temperature of acquisition the first oil pump (1602) output oil and the recycling oil temperature of high temperature fluid outlet pipe (15), and the
Three-temperature sensor (2003) and the 4th temperature sensor (2004) are respectively intended to the oil of acquisition the second oil pump (2002) output oil
The recycling oil temperature of mild cryogen outlet pipe (19), makes the first temperature control equipment (17) and second temperature control device (21) point
The output power for not adjusting the first oil pump (1602) and the second oil pump (2002), to disc insulator (9) high-voltage electricity extremely and
It after low tension extreme temperature is stablized, opens oscillograph (26), sets triggering edge and activation threshold value, and use automatic boosting
Method gives the high-voltage electricity of disc insulator (9) extreme and low tension generator terminal application voltage, when flashover will occur for disc insulator (9)
When, trigger button is pressed on oscillograph (26)；
Step 5, etc. after disc insulators (9) flashover, flashover voltage and flashover waveform are recorded by oscillograph (26)；
Step 6, after the voltage of high voltage power supply (23) is reduced to 0kV, user is with earth brace to high voltage power supply (23) and capacitance-resistance point
Depressor (24) discharges, and then successively closes first heater (1601), the first oil pump (1602), secondary heating mechanism
(2001), the second oil pump (2002), the first temperature control equipment (17) and second temperature control device (21)；
Step 7 successively removes hollow oil circulation device (13), high temperature fluid inlet pipe (14), high temperature fluid outlet pipe (15) and sealing
Bucket (3) is observed on the surface of fault location disc insulator (9) due to the trace that flashover discharges and generates, and is taken pictures, and is determined along face
Flashover occurs in fault location；
Step 8, the trace for disposing disc insulator (9) surface, and wiped with dehydrated alcohol, then repeatedly step 1 arrives step
7, it is tested next time.
6. insulator surface flashover characteristics experimental method under a kind of electric heating Composite Field according to claim 5, feature exist
In the temperature control process of first temperature control equipment (17) is sensed by the first temperature sensor (1603) and second temperature
Device (1604) acquires the temperature of high temperature fuel reserve tank (16), while judging whether the temperature of acquisition is lower than minimum set temperature value,
If being lower than minimum set temperature value, the difference between minimum set temperature value and collecting temperature value need to be calculated, and according to calculating
Difference controls the first temperature control equipment (17) and issues suitable heating power signal, if collected temperature is higher than minimum set
Temperature value is set, then needs to judge whether collected temperature is greater than highest temperature settings, if being higher than highest temperature setting
Value needs the difference by calculating the temperature that highest is arranged between temperature value and collecting temperature value to control the first temperature control equipment
(17) suitable heating power signal is issued, then is looped to determine, when collected temperature value is exactly in minimum set temperature
Between angle value and highest setting temperature value, then need to calculate the first temperature sensor (1603) and second temperature sensor (1604)
The temperature gap of high temperature fuel reserve tank (16) is acquired, so that the first temperature control equipment (17) is controlled the first oil pump according to difference
(1602) output power, exports simultaneously, realizes temperature control with this；
The temperature control process of the second temperature control device (21) is passed by third temperature sensor (2003) and the 4th temperature
Sensor (2004) acquires the temperature of low-temperature reservoir case (20), while judging whether the temperature of acquisition is lower than minimum set temperature
Value need to calculate the difference between minimum set temperature value and collecting temperature value, and according to calculating if being lower than minimum set temperature value
Difference control second temperature control device (21) issue suitable heating power signal, if collected temperature be higher than it is minimum
Temperature value is set, then needs to judge whether collected temperature is greater than highest temperature settings, is set if being higher than highest temperature
Value is set, needs the difference by calculating the temperature that highest is arranged between temperature value and collecting temperature value to control second temperature control and fill
It sets (21) and issues suitable heating power signal, then looped to determine, when collected temperature value is exactly in minimum set
Between temperature value and highest setting temperature value, then need to calculate third temperature sensor (2003) and the 4th temperature sensor
(2004) temperature gaps of low-temperature reservoir case (20) is acquired, the second oil of second temperature control device (21) control is made according to difference
The output power for pumping (2002), exports simultaneously, realizes temperature control with this.
7. insulator surface flashover characteristics experimental provision under a kind of electric heating Composite Field according to claim 1, feature exist
In, adjusted by the way of automatic boosting method disc insulator (9) high-voltage electricity is extreme and voltage that low tension is extreme, it is described
Automatic boosting method be by measure disc insulator (9) high-voltage electricity extremely and low tension extremely whether be needs temperature, if
The temperature that the high-voltage electricity of disc insulator (9) is extreme and low tension is extreme is not required temperature, adjusts external transformer and stops
It only extremely extremely pressurizes with low tension to the high-voltage electricity of disc insulator (9), when the high-voltage electricity of disc insulator (9) is extremely and low
Piezoelectricity is extremely to adjust that external transformer is extreme to the high-voltage electricity of disc insulator (9) and low tension is extreme when needing temperature
Pressurization, and trigger button is pressed on oscillograph (26), judge whether disc insulator (9) occurs flashover, if disc insulator
(9) not flashover, continue to measure disc insulator (9) high-voltage electricity is extreme and temperature that low tension is extreme, when disc insulator (9)
When flashover occurs, transformer is adjusted by the voltage of high voltage power supply (23) and is reduced to 0kV.
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