CN108490278B - Miniaturized basin-type insulator surface charge three-dimensional measurement device and method - Google Patents
Miniaturized basin-type insulator surface charge three-dimensional measurement device and method Download PDFInfo
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- 239000002184 metal Substances 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims description 19
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- 230000002401 inhibitory effect Effects 0.000 claims description 3
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- 239000010453 quartz Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/24—Arrangements for measuring quantities of charge
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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
Abstract
The invention relates to a three-dimensional measuring device and method for surface charge of a miniaturized basin-type insulator, comprising the following steps: the device comprises a cylindrical main tank body, a lower cover plate is fixedly connected to the lower end of the cylindrical main tank body, a first basin-type insulator is lapped at the upper end of the cylindrical main tank body, a supporting rod and a first guide rod are inserted into the lower cover plate, a first electrode is inserted into an insulating block at the upper end of the first guide rod, a second electrode is suspended above the first electrode, a second basin-type insulator is arranged between the first electrode and the second electrode, the outer edge of the second basin-type insulator is lapped on the inner wall of a metal cylinder, a second guide rod is arranged on one side of the cylindrical main tank body, a probe is arranged at one end part of the second guide rod, which is positioned in the cylindrical main tank body, and the probe is sequentially connected with an electrostatic potentiometer, a singlechip and a computer through a data wire. The surface charge measurement of the concave surface of the miniaturized basin-type insulator can be realized, the problem that most experimental devices in the current stage cannot measure the surface charge of the concave surface of the miniaturized insulator is solved, and meanwhile, the measurement device can also measure the surface charge of the convex surface of the miniaturized basin-type insulator.
Description
Technical field:
the invention relates to the technical field of solid insulating material discharge and charge measurement, in particular to a three-dimensional measurement device and method for surface charge of a miniaturized basin-type insulator.
The background technology is as follows:
with the rapid development of extra-high voltage direct current transmission networks in China, gas insulated electrical equipment represented by gas insulated power transmission lines (GIL) and gas insulated metal-enclosed electrical appliances (GIS) is widely applied to modern complicated transmission networks due to the advantages of high insulating strength, good environmental compatibility, easy operation and maintenance and the like. However, under the action of alternating voltage, direct voltage and impulse voltage, the surface of the solid basin-type insulator made of the solid polymer dielectric medium can gradually accumulate charges, when the charges accumulated on the surface of the insulator reach a certain degree, the original electric field can be distorted, so that the voltage of the surface flashover of the insulator is reduced, and when the voltage of the surface flashover of the insulator is severe, the surface flashover of the insulator is also caused, so that the operation reliability of the gas insulation equipment is reduced. Therefore, research on the accumulation and dissipation characteristics of the surface charge of the insulator under direct-current high voltage is of great significance for improving the operation reliability of the gas-insulated electrical equipment.
At present, the study of the polymer surface charge accumulation phenomenon by students at home and abroad still stays in an experimental stage, and a device for measuring the surface charge of an insulator has a plurality of defects, such as: (1) The insulator model used in the experiment mostly adopts a thin-sheet cylindrical shape which is convenient to measure, and the experiment is mostly carried out in low-pressure atmosphere, and the conditions are seriously different from the actual insulation conditions in the gas insulation equipment, so that the simulation of the actual working condition is not facilitated; (2) The insulator surface charge measurement system can only scan and measure an insulator model with a single fixed shape, which is not beneficial to develop a large amount of experimental study; (3) The insulator surface charge measurement system can only scan and measure the charge accumulated on the outer surface of the basin-type insulator model, and cannot measure the charge accumulated on the inner surface of the model. In order to further study the phenomenon of surface charge accumulation of the insulator, perfect the operation stability of the gas-insulated electrical equipment and promote the practicability of the gas-insulated electrical equipment, it is very necessary to improve and perfect the existing surface charge measurement system, so that the existing surface charge measurement system can perform surface charge measurement on the basin-type insulator more safely and reliably in a high-voltage insulating gas environment.
The invention comprises the following steps:
the invention aims to provide a miniaturized basin-type insulator surface charge three-dimensional measurement device and method, so as to measure charges on the inner surface and the outer surface of an insulator.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the invention provides a miniaturized basin-type insulator surface charge three-dimensional measurement device, which comprises: the lower end of the cylindrical main tank body is fixedly connected with a lower cover plate, the upper end of the cylindrical main tank body is lapped with a first basin-type insulator, two first through holes are formed in the lower cover plate, support rods are respectively inserted into the two first through holes, the upper ends of the two support rods are fixedly connected with a metal cylinder, one of the lower ends of the support rods is connected with a first driving device, the first driving device drives the support rods to move up and down, a second through hole is further formed in the lower cover plate, the second through hole is positioned between the two first through holes, a first guide rod is inserted into the second through hole, the lower end of the first guide rod is externally connected with a second driving device or a third driving device, the second driving device drives the first guide rod to move up and down along the vertical direction, the third driving device drives the first guide rod to rotate, the upper end of the first guide rod is fixedly connected with an insulating block, a first electrode is inserted on the insulating block, a second electrode is hung above the first electrode, an upper equalizing cover is arranged at the lower end of the second electrode, a lower equalizing cover is arranged at the upper end of the first electrode, a second basin-type insulator is arranged between the upper equalizing cover and the lower equalizing cover, the outer edge of the second basin-type insulator is lapped on the inner wall of the metal cylinder, the second electrode is communicated with the support rod through a wire, a resistor and a power supply are arranged on the wire, a second guide rod is arranged on one side of the cylindrical main tank body, one end of the second guide rod penetrates through the side wall of the cylindrical main tank body to extend into the cylindrical main tank body, a probe is arranged at one end part of the second guide rod, the probe can rotate around the second guide rod, a fourth driving device is externally connected with the other end of the second guide rod, the fourth driving device drives the second guide rod to move left and right along the horizontal direction, and the probe is sequentially connected with the electrostatic potentiometer, the singlechip and the computer through the data wire.
The upper pressure equalizing cover is provided with a groove, the lower end of the second electrode is convexly provided with a boss, the boss is embedded in the groove, and a spring pin is arranged between the boss and the groove.
The probe is hinged to the end part of the second guide rod through a connecting shaft.
The probe with second guide arm junction is provided with transmission, transmission includes first bevel gear and second bevel gear, second guide arm tip is provided with the U-shaped support, the second guide arm passes the one end tip cover of the bottom plate of U-shaped support is established first bevel gear, be provided with the transmission shaft on the both sides board of U-shaped support, the second bevel gear suit in on the transmission shaft between the both sides board of U-shaped support, just first bevel gear and second bevel gear mesh mutually, the transmission shaft extends to the outside one end tip rigid coupling of U-shaped support the probe.
The first, second, third and fourth driving devices are stepping motors.
The output shafts of the first driving device, the second driving device and the fourth driving device are respectively sleeved with gears, the rod bodies of the supporting rod, the first guide rod and the second guide rod are respectively provided with racks, the gears are meshed with the racks, and the gears drive the racks to move so as to drive the supporting rod, the first guide rod and the second guide rod to linearly move; and an output shaft of the third driving device is connected with the first guide rod through a coupler.
The third driving device is a stepping motor, the first driving device, the second driving device and the fourth driving device are hydraulic cylinders or air cylinders, an output shaft of the third driving device is connected with the first guide rod through a coupler, and piston rods of the hydraulic cylinders or air cylinders are respectively connected with the support rod, the first guide rod and the second guide rod.
The first ultrasonic sensor and the second ultrasonic sensor are arranged at different heights on the inner wall of the cylindrical main tank body, and the distance between the second ultrasonic sensor and the lower cover plate of the cylindrical main tank body is L 1 The distance between the first ultrasonic sensor and the lower cover plate of the cylindrical main tank body is L 2 When (when)When the second basin-type insulator is in contact with the lower equalizing cover at the lower end of the second electrode, the distance from the upper edge of the second basin-type insulator to the lower end part of the probe is L 3 The distance from the lower edge of the second basin-type insulator to the upper end face of the metal cylinder is L 4 The L is 1 Less than or equal to L 3 The L is 2 Less than or equal to L 3 And L 4 And (3) summing.
And a quartz window is arranged on the side wall of the cylindrical main tank body.
The method for measuring the surface charge of the basin-type insulator by adopting the miniaturized three-dimensional measurement device for the surface charge of the basin-type insulator comprises the following specific steps:
step one: dividing the inner surface and the outer surface of the second basin-type insulator into M measuring circles from top to bottom, and dividing each measuring circle into N measuring angles according to angles to obtain MxN measuring points, wherein M and N are natural numbers which are greater than or equal to 1;
step two: checking the air tightness of the cylindrical main tank body, and then placing a second basin-type insulator inside the cylindrical main tank body;
step three: charging air into the cylindrical main tank body, supplying insulating gas until the pressure inside the cylindrical main tank body reaches the required pressure, and stopping charging air;
step four: switching on the power supply, applying voltage to two ends of a second basin-type insulator, switching off the power supply after applying voltage to two ends of the second basin-type insulator for 10-30 minutes, and removing the voltage at two ends of the second basin-type insulator;
step five: starting the first driving device to drive the supporting rod to move downwards, so that the outer edge of the second basin-type insulator is separated from the metal cylinder, charge dissipation from the low-voltage side is restrained, and the first driving device is closed;
step six: connecting the first guide rod with the second driving device, starting the second driving device to drive the first guide rod to move downwards, separating the second basin-type insulator from the second electrode, inhibiting charge from dissipating from a high-voltage side, and closing the second driving device;
step seven: connecting the second guide rod with the fourth driving device, starting the fourth driving device, driving the second guide rod to move towards the second basin-type insulator, moving to the position above the second basin-type insulator, enabling the probe to be aligned with the second basin-type insulator, and closing the fourth driving device;
step eight: the probe is arranged at the bottom of the inner surface of the second basin-type insulator, the first guide rod is connected with the third driving device, the second basin-type insulator is driven to rotate through the third driving device, and the second basin-type insulator starts to measure in a circle-by-circle mode;
step nine: resetting all parts of the device after the inner surface of the second basin-type insulator is measured, turning over the second basin-type insulator by 180 degrees, and repeating the steps two to eight to finish the measurement of the outer surface of the second basin-type insulator;
step ten: after the measurement is completed, the surface of the second basin-type insulator needs to be treated again, and the charges accumulated on the surface of the second basin-type insulator in the measurement process are removed, so that the influence of residual charges on the next measurement is eliminated.
The invention relates to a miniaturized basin-type insulator surface charge three-dimensional measurement device and method, which have the beneficial effects that:
1. according to the three-dimensional measuring device for the surface charge of the miniaturized basin-type insulator, the charge measuring probe is arranged in the cylindrical main tank body, the motion control system is external, the up-and-down motion of the miniaturized basin-type insulator and the horizontal motion of the charge measuring probe are realized by using the driving device, so that the surface charge measurement of the miniaturized basin-type insulator is realized, the size of the experimental tank body is greatly reduced, the use of insulating gas is further reduced, and the experimental cost is greatly reduced;
2. the three-dimensional measuring device for the surface charge of the miniaturized basin-type insulator can measure the surface charge of the concave surface of the miniaturized basin-type insulator, solves the problem that most experimental devices in the prior art cannot measure the surface charge of the concave surface of the miniaturized insulator, and can measure the surface charge of the convex surface of the miniaturized basin-type insulator;
3. the invention provides a three-dimensional measuring device for the surface charge of a miniaturized basin-type insulator, which provides a three-electrode mechanism capable of simulating a GIS/GIL shell, and is more close to reality;
4. the miniaturized basin-type insulator surface charge three-dimensional measuring device provided by the invention can accurately control the movement distance of the first guide rod and the second guide rod, and a first ultrasonic sensor and a second ultrasonic sensor are arranged in the cylindrical main tank body for protecting the movement distance of the first guide rod and the second guide rod respectively;
5. according to the miniaturized basin-type insulator surface charge three-dimensional measurement device, the spring pin device at the joint of the high-voltage side second electrode and the upper voltage equalizing cover can enable the second basin-type insulator sample piece to be in good contact with the upper voltage equalizing cover and the lower voltage equalizing cover, collision among all devices can be effectively controlled, and safety of the insulator sample piece is protected;
6. the three-dimensional measuring device for the surface charge of the miniaturized basin-type insulator provided by the invention has the advantages that all movements are completed by controlling each driving device through the singlechip, and the measuring device can measure the surface charge of insulators with different shapes by changing the program of the singlechip;
7. the miniaturized basin-type insulator surface charge three-dimensional measurement device provided by the invention can be used for measuring the surface charge of a basin-type insulator in different insulating gas media (such as SF 6 、CF 4 、N 4 Equal gas), and under different gas pressures (0.1-0.6 MPa), the application range is wider, and the practicability is strong.
Description of the drawings:
FIG. 1 is a schematic diagram of a three-dimensional measuring device for surface charge of a miniaturized basin-type insulator;
FIG. 2 is a schematic diagram of the movement states of the steps five to six when a miniaturized three-dimensional measuring device for the surface charge of the basin-type insulator is used for measuring the surface charge of the basin-type insulator;
FIG. 3 is a schematic diagram of the movement states of steps seven to eight when a miniaturized three-dimensional measuring device for the surface charge of the basin-type insulator is used to measure the surface charge of the basin-type insulator;
FIG. 4 is a schematic diagram of the movement states of the steps five to six when a miniaturized three-dimensional measuring device for the surface charge of the basin-type insulator is used to measure the charge of the outer surface of the basin-type insulator;
FIG. 5 is a schematic diagram of the movement states of steps seven to eight when a miniaturized three-dimensional measuring device for the surface charge of the basin-type insulator is used to measure the charge of the outer surface of the basin-type insulator;
FIG. 6 is a schematic diagram of a transmission;
in the figure: the device comprises a 1-cylindrical main tank body, a 2-lower cover plate, a 3-first basin-type insulator, a 4-supporting rod, a 5-metal cylinder, a 6-first driving device, a 7-first guide rod, an 8-second driving device, a 9-third driving device, a 10-insulating block, a 11-first electrode, a 12-second electrode, a 13-upper equalizing cover, a 14-lower equalizing cover, a 15-spring pin, a 16-second basin-type insulator, a 17-guide wire, a 18-resistor, a 19-power supply, a 20-second guide rod, a 21-probe, a 22-fourth driving device, a 23-connecting shaft, a 24-electrostatic position meter, a 25-data wire, a 26-singlechip, a 27-computer, a 28-first ultrasonic sensor, a 29-second ultrasonic sensor, a 30-U-shaped bracket, a 31-bottom plate, a 32-side plate, a 33-transmission shaft, a 34-first bevel gear, a 35-second bevel gear and a 36-fifth driving device.
The specific embodiment is as follows:
the following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
According to fig. 1, the invention provides a miniaturized basin-type insulator surface charge three-dimensional measurement device, which comprises: the hollow cylindrical main tank body 1 with the upper end and the lower end both open, a quartz window is arranged on the side wall of the cylindrical main tank body 1, a lower cover plate 2 is fixedly connected with the lower end of the cylindrical main tank body 1, a first basin-type insulator 3 is lapped at the upper end of the cylindrical main tank body, two first through holes are arranged on the lower cover plate 2, air inlet and outlet holes for insulating gas to enter and exit are also arranged on the lower cover plate 2, a supporting rod 4 is respectively inserted into the two first through holes, the upper ends of the two supporting rods 4 are fixedly connected with a metal cylinder 5, one of the lower ends of the supporting rods 4 is connected with a first driving device 6, the first driving device 6 drives the supporting rod 4 to move up and down along the vertical direction, a second through hole is also arranged on the lower cover plate 2, a first guide rod 7 is inserted into the second through hole between the two first through holes, the lower end of the first guide rod 7 is externally connected with a second driving device 8 or a third driving device 9, the second driving device 8 drives the first guide rod 7 to move up and down, the third driving device 9 drives the first guide rod 7 to rotate, an insulating block 10 is fixedly connected to the upper end of the first guide rod 7, the insulating block 10 is made of PTFE insulating material, reliable insulation is guaranteed, a first electrode 11 is inserted on the insulating block 10, a second electrode 12 is hung above the first electrode 11, an upper equalizing cover 13 is arranged at the lower end of the second electrode 12, a lower equalizing cover 14 is arranged at the upper end of the first electrode 11, in the embodiment, a groove is formed in the upper equalizing cover 13, a boss is convexly arranged at the lower end of the second electrode 12, the boss is embedded in the groove, a spring pin 15 is arranged between the boss and the groove, a second basin-shaped insulator 16 is arranged between the upper equalizing cover and the lower equalizing cover, the spring pin 15 provides a guarantee for good contact between the second basin-shaped insulator 16 and the upper and lower equalizing covers, the outer edge of the second basin-shaped insulator 16 is lapped on the inner wall of the metal cylinder 5, the second electrode 12 is communicated with the supporting rod 4 through a wire 17, a resistor 18 and a power supply 19 are arranged on the wire 17, the wire 17 is grounded, one side of the cylindrical main tank body 1 is provided with a second guide rod 20, one end of the second guide rod 20 penetrates through the side wall of the cylindrical main tank body 1 to extend into the cylindrical main tank body, one end of the second guide rod 20 positioned in the cylindrical tank body is provided with a probe 21, the probe 21 is a Kelvin charge measurement probe, the other end of the static electricity meter is externally connected with a fourth driving device 22, the fourth driving device 22 drives the second guide rod 20 to move left and right along the horizontal direction, the probe 21 is connected with the static electricity meter 24 through a data wire 25, the probe 21 transmits collected data to the static electricity meter 24 through the data wire 25, the output end of the static electricity meter 24 is connected with the input end of the single chip microcomputer 26, the collected data is transmitted to the single chip microcomputer 26 through the data wire 25, an analog signal is converted into a digital signal by the single chip microcomputer 26, the output end of the single chip microcomputer 26 is connected with the computer 27, the converted digital signal is stored in the computer 27, and the later processing of the data is facilitated.
Further, in an embodiment, the probe 21 is hinged to the end of the second guide rod 20 through a connecting shaft 23, so that the probe 21 can rotate around the second guide rod 20 to measure different positions of the second basin-type insulator, in another embodiment, a transmission device is arranged at a connection position of the probe 21 and the second guide rod 20, as shown in fig. 6, the transmission device comprises a first bevel gear 34 and a second bevel gear 35, the end of the second guide rod 20 is provided with a U-shaped bracket 30, the second guide rod 20 passes through one end of a bottom plate 31 of the U-shaped bracket 30 and is sleeved with the first bevel gear 34, two side plates 32 of the U-shaped bracket 30 are provided with transmission shafts 33, the second bevel gear 35 is sleeved on the transmission shafts 33 between the two side plates 32 of the U-shaped bracket 30, the transmission shafts 33 are meshed with the second bevel gear 35, one end of the outer part of the U-shaped bracket 30 is fixedly connected with the probe 21, and the second guide rod 20 is connected with a fifth motor 36, and the second motor 36 is driven by the fifth motor, so that the measurement device can always rotate in a vertical direction, and the measurement process can keep accurate measurement of the measurement data.
Further, in an embodiment, the first, second, third and fourth driving devices may each be a stepper motor, and the output shafts of the first driving device 6, the second driving device 8 and the fourth driving device 22 are respectively sleeved with gears, the shafts of the support rod 4, the first guide rod 7 and the second guide rod 20 are respectively provided with racks, the gears and the racks are meshed, and the gears drive the racks to move, so as to drive the support rod 4, the first guide rod 7 and the second guide rod 20 to move linearly; the output shaft of the third driving device 9 is connected with the first guide rod 7 through a coupling, the driving in the linear direction is realized through the first driving device, the second driving device and the fourth driving device, and the driving in the rotation direction is realized through the third driving device 9.
Further, in another embodiment, the third driving device 9 is a stepper motor, the first, second and fourth driving devices are hydraulic cylinders or air cylinders, an output shaft of the third driving device 9 is connected with the first guide rod 7 through a coupling, a piston rod of the hydraulic cylinder or air cylinder is respectively connected with the support rod 4, the first guide rod 7 and the second guide rod 20, driving in a linear direction is achieved through the first, second and fourth driving devices, and driving in a rotating direction is achieved through the third driving device 9.
Further, a first ultrasonic sensor 28 and a second ultrasonic sensor 29 are arranged at different heights on the inner wall of the cylindrical main tank body 1, and the second ultrasonic sensor 29 is connected with the cylindrical main tankThe distance of the lower cover plate 2 of the body 1 is L 1 The distance between the first ultrasonic sensor 28 and the lower cover plate 2 of the cylindrical main tank body 1 is L 2 When the second basin-type insulator 16 is in contact with the lower pressure equalizing cover 14 at the lower end of the second electrode 12, the distance from the upper edge of the second basin-type insulator 16 to the lower end of the probe 21 is L 3 The distance from the lower edge of the second basin-type insulator 16 to the upper end face of the metal cylinder 5 is L 4 The L is 1 Less than or equal to L 3 The L is 2 Less than or equal to L 3 And L 4 And, during the measurement, it is set that when the lower end of the metal cylinder 5 descends to coincide with the horizontal position of the second ultrasonic sensor 29, the first driving means 6 stops moving, the support rod 4 stops descending, and when the upper edge of the second basin insulator 16 descends to coincide with the horizontal position of the first ultrasonic sensor 28, the second driving means 8 stops moving, and the first guide rod 7 stops descending.
The method for measuring the surface charge of the basin-type insulator by adopting the miniaturized three-dimensional measurement device for the surface charge of the basin-type insulator comprises the following specific steps:
step one: dividing the inner surface and the outer surface of the second basin-type insulator 16 into 15 measuring circles from top to bottom, and dividing each measuring circle into 20 measuring angles according to angles to obtain 300 measuring points;
step two: checking the air tightness of the cylindrical main tank body 1, and then placing a second basin-type insulator 16 inside the cylindrical main tank body 1;
step three: charging air into the cylindrical main tank body 1, supplying insulating gas until the pressure inside the cylindrical main tank body reaches the required pressure, and stopping charging air;
step four: switching on the power supply 19, applying a voltage to two ends of the second basin-type insulator 16, wherein the voltage can be direct current, alternating current or impulse voltage, and after the voltage is applied to two ends of the second basin-type insulator 16 for 10-30 minutes, switching off the power supply 19 to remove the voltage at two ends of the second basin-type insulator 16;
step five: as shown in fig. 2-5, the first driving device 6 is started to drive the supporting rod 4 to move downwards, so that the outer edge of the second basin-type insulator 16 is separated from the metal cylinder 5, charge dissipation from the low-voltage side is inhibited, and the first driving device 6 is closed;
step six: connecting the first guide rod 7 with the second driving device 8, starting the second driving device 8 to drive the first guide rod 7 to move downwards, separating the second basin-type insulator 16 from the second electrode 12, inhibiting charge from dissipating from the high-voltage side, and closing the second driving device 8;
step seven: connecting the second guide rod 20 with the fourth driving device 22, starting the fourth driving device 22, driving the second guide rod 20 to move towards the second basin-type insulator 16, moving to the position above the second basin-type insulator 16, aligning the probe 21 with the second basin-type insulator 16, closing the fourth driving device 22, connecting the second guide rod 20 with the fifth driving device 36, starting the fifth driving device 36, adjusting the probe 21 to be perpendicular to the inner surface of the second basin-type insulator 16, and closing the fifth driving device 36;
step eight: placing the probe 21 at the bottom of the inner surface of the second basin-type insulator 16, connecting the first guide rod 7 with the third driving device 9, driving the second basin-type insulator 16 to rotate through the third driving device 9, and measuring the second basin-type insulator 16 circle by circle, specifically, after completing a certain circle of measurement, connecting the first guide rod 7 with the second driving device 8, starting the second driving device 8, driving the first guide rod 7 to move downwards, connecting the second guide rod 20 with the fifth driving device 36, starting the fourth driving device 36, adjusting the probe 21 to be perpendicular to the inner surface of the second basin-type insulator 16, closing the fourth driving device 22, connecting the first guide rod 7 with the third driving device 9, driving the second basin-type insulator 16 to rotate through the third driving device 9, and starting the measurement on the other circle of the second basin-type insulator 16;
step nine: after the inner surface of the second basin-type insulator 16 is measured, resetting all parts of the device, turning over the second basin-type insulator 16 for 180 degrees, repeating the steps two to eight, and completing the measurement of the outer surface of the second basin-type insulator 16;
step ten: after the measurement is completed, the inner and outer surfaces of the second basin-type insulator 16 are required to be treated again, and charges accumulated on the inner and outer surfaces of the second basin-type insulator 16 during the measurement are removed, so that the influence of residual charges on the next measurement is eliminated.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which are intended to be covered by the scope of the claims.
Claims (9)
1. A method for measuring the surface charge of a basin-type insulator by a miniaturized basin-type insulator surface charge three-dimensional measuring device comprises the following steps: the lower end of the cylindrical main tank body is fixedly connected with a lower cover plate, the upper end of the cylindrical main tank body is lapped with a first basin-type insulator, two first through holes are formed in the lower cover plate, support rods are respectively inserted into the two first through holes, the upper ends of the two support rods are fixedly connected with a metal cylinder, one of the lower ends of the support rods is connected with a first driving device, the first driving device drives the support rods to move up and down, a second through hole is also formed in the lower cover plate, the second through hole is positioned between the two first through holes, a first guide rod is inserted into the second through hole, the lower end of the first guide rod is externally connected with a second driving device and a third driving device, the second driving device drives the first guide rod to move up and down along the vertical direction, the third driving device drives the first guide rod to rotate, the upper end of the first guide rod is fixedly connected with an insulating block, the insulation block is inserted with a first electrode, a second electrode is hung above the first electrode, the lower end of the second electrode is provided with an upper equalizing cover, the upper end of the first electrode is provided with a lower equalizing cover, a second basin-type insulator is arranged between the upper equalizing cover and the lower equalizing cover, the outer edge of the second basin-type insulator is lapped on the inner wall of the metal cylinder, the second electrode is communicated with the support rod through a wire, a resistor and a power supply are arranged on the wire, one side of the cylindrical main tank body is provided with a second guide rod, one end of the second guide rod penetrates through the side wall of the cylindrical main tank body to extend into the cylindrical main tank body, a probe is arranged at one end part of the second guide rod positioned in the cylindrical main tank body, the probe can rotate around the second guide rod, the other end of the second guide rod is externally connected with a fourth driving device, the fourth driving device drives the second guide rod to move left and right along the horizontal direction, and the probe is sequentially connected with the electrostatic potentiometer, the singlechip and the computer through the data wire; the method is characterized by comprising the following steps of:
step one: dividing the inner surface and the outer surface of the second basin-type insulator into M measuring circles from top to bottom, and dividing each measuring circle into N measuring angles according to angles to obtain MxN measuring points, wherein M and N are natural numbers which are greater than or equal to 1;
step two: checking the air tightness of the cylindrical main tank body, and then placing a second basin-type insulator inside the cylindrical main tank body;
step three: charging air into the cylindrical main tank body, supplying insulating gas until the pressure inside the cylindrical main tank body reaches the required pressure, and stopping charging air;
step four: switching on the power supply, applying voltage to two ends of a second basin-type insulator, switching off the power supply after applying voltage to two ends of the second basin-type insulator for 10-30 minutes, and removing the voltage at two ends of the second basin-type insulator;
step five: starting the first driving device to drive the supporting rod to move downwards, so that the outer edge of the second basin-type insulator is separated from the metal cylinder, charge dissipation from the low-voltage side is restrained, and the first driving device is closed;
step six: connecting the first guide rod with the second driving device, starting the second driving device to drive the first guide rod to move downwards, separating the second basin-type insulator from the second electrode, inhibiting charge from dissipating from a high-voltage side, and closing the second driving device;
step seven: connecting the second guide rod with the fourth driving device, starting the fourth driving device, driving the second guide rod to move towards the second basin-type insulator, moving to the position above the second basin-type insulator, enabling the probe to be in contact with the second basin-type insulator, adjusting the probe to be perpendicular to the inner surface of the second basin-type insulator, and closing the fourth driving device;
step eight: the probe is arranged at the bottom of the inner surface of the second basin-type insulator, the first guide rod is connected with the third driving device, the second basin-type insulator is driven to rotate through the third driving device, and the second basin-type insulator starts to measure in a circle-by-circle mode;
step nine: resetting all parts of the device after the inner surface of the second basin-type insulator is measured, turning over the second basin-type insulator by 180 degrees, and repeating the steps two to eight to finish the measurement of the outer surface of the second basin-type insulator;
step ten: after the measurement is completed, the surface of the second basin-type insulator needs to be treated again, and the charges accumulated on the surface of the second basin-type insulator in the measurement process are removed, so that the influence of residual charges on the next measurement is eliminated.
2. The method for measuring the surface charge of the basin-type insulator by using the miniaturized basin-type insulator surface charge three-dimensional measuring device according to claim 1, wherein the method comprises the following steps of: the upper pressure equalizing cover is provided with a groove, the lower end of the second electrode is convexly provided with a boss, the boss is embedded in the groove, and a spring pin is arranged between the boss and the groove.
3. The method for measuring the surface charge of the basin-type insulator by using the miniaturized basin-type insulator surface charge three-dimensional measuring device according to claim 1, wherein the method comprises the following steps of: the probe is hinged to the end part of the second guide rod through a connecting shaft.
4. The method for measuring the surface charge of the basin-type insulator by using the miniaturized basin-type insulator surface charge three-dimensional measuring device according to claim 1, wherein the method comprises the following steps of: the probe with second guide arm junction is provided with transmission, transmission includes first bevel gear and second bevel gear, second guide arm tip is provided with the U-shaped support, the second guide arm passes the one end tip cover of the bottom plate of U-shaped support is established first bevel gear, be provided with the transmission shaft on the both sides board of U-shaped support, the second bevel gear suit in on the transmission shaft between the both sides board of U-shaped support, just first bevel gear and second bevel gear mesh mutually, the transmission shaft extends to the outside one end tip rigid coupling of U-shaped support the probe.
5. The method for measuring the surface charge of the basin-type insulator by using the miniaturized basin-type insulator surface charge three-dimensional measuring device according to claim 1, wherein the method comprises the following steps of: the first, second, third and fourth driving devices are stepping motors.
6. The method for measuring the surface charge of the basin-type insulator by using the miniaturized basin-type insulator surface charge three-dimensional measuring device according to claim 5, wherein the method comprises the following steps of: the output shafts of the first driving device, the second driving device and the fourth driving device are respectively sleeved with gears, the rod bodies of the supporting rod, the first guide rod and the second guide rod are respectively provided with racks, the gears are meshed with the racks, and the gears drive the racks to move so as to drive the supporting rod, the first guide rod and the second guide rod to linearly move; and an output shaft of the third driving device is connected with the first guide rod through a coupler.
7. The method for measuring the surface charge of the basin-type insulator by using the miniaturized basin-type insulator surface charge three-dimensional measuring device according to claim 1, wherein the method comprises the following steps of: the third driving device is a stepping motor, the first driving device, the second driving device and the fourth driving device are hydraulic cylinders or air cylinders, an output shaft of the third driving device is connected with the first guide rod through a coupler, and piston rods of the hydraulic cylinders or air cylinders are respectively connected with the support rod, the first guide rod and the second guide rod.
8. The method for measuring the surface charge of the basin-type insulator by using the miniaturized basin-type insulator surface charge three-dimensional measuring device according to claim 1, wherein the method comprises the following steps of: the first ultrasonic sensor and the second ultrasonic sensor are arranged at different heights on the inner wall of the cylindrical main tank body, and the distance between the second ultrasonic sensor and the lower cover plate of the cylindrical main tank body is L 1 The distance between the first ultrasonic sensor and the lower cover plate of the cylindrical main tank body is L 2 When the second basin-type insulator is in contact with the lower equalizing cover at the lower end of the second electrode, the distance from the upper edge of the second basin-type insulator to the lower end part of the probe is L 3 The distance from the lower edge of the second basin-type insulator to the upper end face of the metal cylinder is L 4 The L is 1 Less than or equal to L 3 The L is 2 Less than or equal to L 3 And L 4 And (3) summing.
9. The method for measuring the surface charge of the basin-type insulator by using the miniaturized basin-type insulator surface charge three-dimensional measuring device according to claim 1, wherein the method comprises the following steps of: and a quartz window is arranged on the side wall of the cylindrical main tank body.
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| CN111308230A (en) * | 2018-12-12 | 2020-06-19 | 平高集团有限公司 | Surface charge measuring device and measuring method |
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| CN110161323A (en) * | 2019-04-17 | 2019-08-23 | 天津大学 | Insulator surface potential measurement system and measurement method based on multisensor syste |
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| CN114675091B (en) * | 2022-04-05 | 2023-07-18 | 中国长江电力股份有限公司 | High-voltage basin-type insulator surface particle aggregation electric field analysis device |
| CN116859201B (en) * | 2023-09-05 | 2023-11-17 | 武汉莱恩输变电设备股份有限公司 | Device and method for measuring and detecting surface charge quantity of high-voltage power transmission and transformation insulator |
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