CN113125914B - Test platform for water diffusion test of composite insulator with jacket core rod - Google Patents
Test platform for water diffusion test of composite insulator with jacket core rod Download PDFInfo
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- CN113125914B CN113125914B CN202110510268.XA CN202110510268A CN113125914B CN 113125914 B CN113125914 B CN 113125914B CN 202110510268 A CN202110510268 A CN 202110510268A CN 113125914 B CN113125914 B CN 113125914B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/20—Preparation of articles or specimens to facilitate testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1245—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of line insulators or spacers, e.g. ceramic overhead line cap insulators; of insulators in HV bushings
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Abstract
A test platform for a composite insulator with a sheath core rod water diffusion test comprises a voltage regulator, a test transformer, a voltage divider, a test bed, an infrared imaging camera, an infrared remote control switch, an upper polar plate, a lower polar plate, an insulating support, a digital microampere meter, a controller, a display and a residual current operated relay; the test transformer is connected with the voltage regulator and the voltage divider, the test bed is provided with a high-voltage lead input end and a plurality of high-voltage lead output ends, the voltage divider is connected with the high-voltage lead input end, and the infrared remote control switch is connected with the high-voltage lead output end and the upper polar plate; the lower polar plate is connected with a digital microammeter, the digital microammeter is connected with a controller, a display is connected with an infrared imaging camera and the controller, and a residual current operated relay is installed in a power supply box. The infrared remote control switch is controlled to be switched off through the controller, so that the phenomenon that the test of other insulators to be tested is continuously carried out due to the fact that any insulator to be tested is unqualified is avoided, and therefore the test of a plurality of insulators to be tested can be simultaneously carried out.
Description
Technical Field
The invention relates to the field of high-voltage test platforms, in particular to a test platform for a composite insulator with a sheath core rod water diffusion test.
Background
The composite insulator has the advantages of light weight, high strength, convenience in manufacturing and mounting, pollution flashover resistance and the like, is widely applied to power transmission lines, not only prevents pollution flashover accidents in a large range, but also reduces the operation and maintenance cost in polluted areas to a great extent, and achieves a good operation effect. When the outer surface of the composite insulator is damaged or the interface of the core rod sheath is not firmly bonded, moisture can permeate into the core rod from the surface of the sheath, so that the core rod is affected with damp and partially discharged, the insulating property of the core rod is reduced after the core rod is wetted for a long time, and the composite insulator has a conventional inspection test on the composite insulator, so that the insulating property of the core rod of the insulator and the insulating property between the core rod and the sheath can be inspected.
At present, there is not the test platform who is specially adapted to develop composite insulator area sheath plug water diffusion test temporarily in the market, and the development of this test project adopts traditional withstand voltage equipment and external microampere table to build mostly, because will carry out data monitoring and analysis to each insulator sample, so can only develop the experiment to the sample one by one, has work efficiency low and the test result receives the influence of artificial analysis error. Meanwhile, frequent replacement of the composite insulator to be tested not only produces a great deal of repetitive labor, but also easily forgets the grounding wire in the process of wire replacement, thus causing series safety problems.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a test platform for a composite insulator with a sheath core rod water diffusion test, and a plurality of insulator tests are simultaneously carried out.
In order to achieve the purpose, the invention adopts the following technical scheme:
a test platform for a composite insulator with a sheath core rod water diffusion test comprises a voltage regulator, a test transformer, a voltage divider, a test bed, an infrared imaging camera, an infrared remote control switch, an upper polar plate, a lower polar plate, an insulation support, a digital microampere meter, a controller, a display and a residual current operated relay. The test transformer is connected with the voltage regulator and the voltage divider, the test bed is provided with a high-voltage lead input end and a plurality of high-voltage lead output ends, the voltage divider is connected with the high-voltage lead input end, and the infrared remote control switch is connected with the high-voltage lead output end and the upper polar plate; the lower polar plate is connected with a digital microampere meter, the digital microampere meter is connected with a controller, the display is connected with the infrared imaging camera and the controller, the residual current action relay is installed in a power supply box and is provided with an action current threshold, and the action time is quick action and has no time delay.
The voltage regulator, test transformer and voltage divider constitute the step-up system, through adjusting the voltage regulator changes the voltage, test transformer risees voltage to test voltage, the voltmeter of voltage divider shows the insulator withstand voltage that awaits measuring.
Furthermore, the top end of the test bed is provided with a high-voltage lead input end and a plurality of high-voltage lead output ends, the installation positions of the high-voltage lead input end and the high-voltage lead output ends are made of insulating materials, the high-voltage lead input end is connected with the high-voltage lead output ends through a high-voltage lead, and the used high-voltage lead is provided with an insulating sheath, so that the high-voltage lead is not exposed outside.
Furthermore, the infrared imaging camera is installed at the top end of the test bed, the installation position of the infrared imaging camera is made of insulating materials, all the insulating materials can bear 30KV overvoltage, and the situation that the high-voltage system interferes with the low-voltage system to influence the infrared imaging camera to acquire image signals of the insulator to be tested is avoided.
Furthermore, the insulating support is used for supporting the lower polar plate, and the installation position of the lower polar plate is made of insulating materials, so that the current is prevented from flowing into the ground, and the test result is prevented from being influenced.
Further, the infrared imaging camera has a temperature abnormal rise alarm function, an abnormal temperature rise threshold value is set, when the abnormal temperature rise exceeds the abnormal temperature rise threshold value, a temperature abnormal rise alarm is sent, the insulator to be tested corresponding to the sent temperature abnormal rise alarm is unqualified, and the insulator to be tested corresponding to the alarm which does not send the temperature abnormal rise alarm is qualified; the infrared imaging camera has a large enough visual angle, so that all insulators to be detected are reflected in the visual angle of the infrared imaging camera.
Further, the controller collects the current of the insulator to be tested, an infrared remote control current threshold value is set, and when the current value of the insulator to be tested, which is collected by the controller, is larger than the infrared remote control current threshold value, the controller controls the infrared remote control switch to be disconnected, performs data processing, and transmits data to the display.
Further, the display displays a microammeter-time line graph of the insulators to be tested and has an acousto-optic alarm function, if the current value of the insulators to be tested rises all the time, the display sends out an acousto-optic alarm corresponding to the numbering sub-window, if the insulators to be tested exceed the infrared remote control current threshold value, the display also sends out an acousto-optic alarm corresponding to the numbering sub-window, the insulators to be tested which send out the acousto-optic alarm are judged to be unqualified, and the insulators to be tested which do not send out the acousto-optic alarm are qualified.
The invention has the beneficial effects that: the test platform has the advantages of sound-light alarm and temperature abnormal rise alarm, automatically identifying whether the insulator to be tested is qualified or not, and controlling the infrared remote control switch to be switched off through the controller, so that the phenomenon that the test of other insulators to be tested is continuously carried out due to the fact that any insulator to be tested is unqualified is avoided, and a plurality of insulator tests to be tested can be simultaneously carried out.
Drawings
Fig. 1 is a schematic structural diagram of a test platform for a composite insulator with a jacket core rod water diffusion test according to the invention.
The reference numbers are as follows:
the device comprises a voltage regulator 1, a test transformer 2, a voltage divider 3, a test bench 4, an infrared imaging camera 5, an infrared remote control switch 6, an upper polar plate 7, a lower polar plate 8, an insulating support 9, a digital microammeter 10, a controller 11, a display 12, a residual current action relay 13, a high-voltage lead input end 14 and a high-voltage lead output end 15.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
As shown in fig. 1, a test platform for a composite insulator with a sheath core rod water diffusion test comprises a voltage regulator 1, a test transformer 2, a voltage divider 3, a test bed 4, an infrared imaging camera 5, an infrared remote control switch 6, an upper polar plate 7, a lower polar plate 8, an insulating support 9, a digital microammeter 10, a controller 11, a display 12 and a residual current action relay 13. The test transformer 2 is connected with the voltage regulator 1 and the voltage divider 3, the test bed 4 is provided with a high-voltage lead input end 14 and a plurality of high-voltage lead output ends 15, the high-voltage lead input end 14 is connected with the voltage divider 3, and the infrared remote control switch 6 is connected with the high-voltage lead output end 15 and the upper polar plate 7; the lower polar plate 8 is connected with a digital microammeter 10, the digital microammeter 10 is connected with a controller 11, and a display 12 is connected with the infrared imaging camera 5 and the controller 11; the residual current action relay 13 is arranged in a power supply box, an action current threshold value is set, and the action time is quick action without time delay.
The voltage regulator 1, the test transformer 2 and the voltage divider 3 form a boosting system, the voltage is changed by adjusting the voltage regulator 1, the test transformer 2 boosts the voltage to a test voltage, a voltmeter of the voltage divider 3 displays the withstand voltage of the insulator to be tested, and the voltage regulator 1 is controlled to increase the voltage to the test voltage according to the reading of the voltmeter.
The top end of the test bed 4 is provided with a high-voltage lead input end 14 and a plurality of high-voltage lead output ends 15, the installation positions of the high-voltage lead input end 14 and the high-voltage lead output ends 15 are made of insulating materials, the high-voltage lead input end 14 is connected with the high-voltage lead output ends 15 through high-voltage wires, and the used high-voltage wires are provided with insulating covers, so that the high-voltage wires are not exposed outside.
The infrared imaging camera 5 is installed on the top end of the test bed 4, the installation position of the infrared imaging camera 5 is made of insulating materials, all the insulating materials can bear 30KV overvoltage, and the high-voltage system is prevented from interfering the low-voltage system, so that the infrared imaging camera 5 is prevented from acquiring image signals of the insulator to be tested. The infrared imaging camera 5 has a large enough visual angle, so that all insulators to be tested are reflected in the visual angle of the infrared imaging camera 5, the infrared imaging camera 5 is connected to the display 12 through a low-voltage secondary loop, so that image signals collected by the infrared imaging camera 5 are output to the display 12, the infrared imaging camera 5 has a temperature abnormal rise alarm function, an abnormal temperature rise threshold value is set, the abnormal temperature rise exceeds the abnormal temperature rise threshold value to send a temperature abnormal rise alarm, the insulator to be tested corresponding to the temperature abnormal rise alarm is unqualified, and the insulator to be tested corresponding to the temperature abnormal rise alarm is not qualified.
The infrared remote control switch 6 is controlled to be switched on or switched off by the controller 11 through infrared remote control, an infrared remote control current threshold value is set, and when the current value of the digital microammeter 10 is larger than the infrared remote control current threshold value, the controller 11 controls the infrared remote control switch 6 to be switched on or switched off through infrared remote control. Through the mode of infrared remote control, can avoid causing other insulator test specimens that await measuring to suspend the test because of arbitrary 1 insulator test specimen that awaits measuring is unqualified. The infrared remote control switch 6 does not have an arc extinguishing function and cannot cut off breakdown overcurrent, therefore, a breaking time delay (0.5s) should be set, the breakdown overcurrent is broken by the residual current operated relay 13, and the broken residual current operated relay 13 and the infrared remote control switch 6 are required to be manually restored after the test is finished.
The polar plate includes upper polar plate 7 and bottom plate 8, and upper polar plate 7 and bottom plate 8 constitute the activity polar plate, and upper polar plate 7 is equipped with bellied electrically conductive input, and this bellied electrically conductive input is connected with high-voltage wire, and upper polar plate 7 passes through high-voltage wire with infrared remote control switch 6 to be connected, and bottom plate 8 is equipped with bellied electrically conductive output, and this bellied electrically conductive output is connected with high-voltage wire, and bottom plate 8 is connected with digital microammeter 10. The movable polar plate formed by the upper polar plate 7 and the lower polar plate 8 is used for fixing the insulator to be tested. The upper polar plate 7 and the lower polar plate 8 form a capacitor, and the load of the test power system has no other loads except the polar plates and the insulator to be tested, so that the load has high capacitance, and in order to reduce the influence of the capacitance-rise effect (the voltage of the load end is higher than that of the voltage regulating end), the voltage divider 3 is provided with a voltmeter and used for accurately measuring the load voltage and reducing the influence of the capacitance-rise effect.
The insulating support 9 is used for supporting the lower polar plate 8, and the installation position of the lower polar plate 8 is made of insulating materials, so that the current is prevented from flowing into the ground, and the test result is prevented from being influenced.
The digital microammeter 10 is connected with the lower polar plate 8 and the controller 11 through a secondary circuit line, and the digital microammeter 10 is calibrated regularly to ensure the reliability of verification data.
The controller 11 collects current readings of the digital microammeters 10 in real time, sets an infrared remote control current threshold, and when the current value collected by the controller 11 is larger than the infrared remote control current threshold, the controller 11 controls the infrared remote control switch 6 to be switched off, processes data, transmits the data to the display 12, and the display 12 displays a test result.
The display 12 has the functions of displaying the signal image collected by the infrared imaging camera 5, displaying the current value of the digital microammeter 10 according to the mark number of the insulator to be tested, displaying the data of the digital microammeter, namely a time-line diagram, and giving an audible and visual alarm. The display 12 displays the mark number of the insulator to be tested and sequentially displays a microampere meter-time broken line graph, if the current value of the digital microampere meter 10 is always increased along with the time, the insulation performance of the insulator is considered to be degraded, the display 12 sends out an audible and visual alarm corresponding to the numbering sub-window, if the data of the digital microampere meter 10 exceeds the infrared remote control current threshold value, the display also sends out the audible and visual alarm corresponding to the numbering sub-window, the insulator to be tested corresponding to the audible and visual alarm is judged to be unqualified, and the insulator to be tested corresponding to the audible and visual alarm is not sent out is judged to be qualified.
The residual current action relay 13 is arranged in a power supply box, and is provided with an action current threshold value, and the action time is quick action without time delay.
Example 1:
the embodiment of the invention provides a test platform for a composite insulator with a sheath core rod water diffusion test, which comprises the following steps:
step 1: a diamond circular saw blade is used for cutting 6 samples on 1 insulator under flowing cold water, the cutting direction and the core axis form 90 degrees, and the length of the samples is 30mm +/-0.5 mm (millimeter). And the cutting surface of the sample is polished smooth by using 180-mesh fine abrasive cloth, and the two cutting end surfaces are clean and parallel to each other.
And 2, step: the cut samples were immediately cleaned with isopropanol and filter paper by scrubbing prior to boiling, placed in a suitable container (e.g., a glass or stainless steel container) and boiled in deionized water containing 0.1% NaCI (by weight) for 100 h. + -. 0.5h (h: h).
And step 3: after boiling, the sample is taken out of the vessel and placed in another vessel filled with tap water (e.g., glass or stainless steel) at room temperature for at least 15min (min: min).
And 4, step 4: the insulator tested product after being boiled in water is numbered as 1-6 and is sequentially placed between an upper polar plate 7 and a lower polar plate 8 of a test platform to be fixedly and firmly fixed. The high voltage lead is clamped on the flat iron of the upper pole plate 7 through an iron clamp.
And 5: the infrared remote control switch 6 and the residual current operated relay 13 are manually closed. And (3) switching on a secondary power supply of the distribution box, manually resetting the digital microammeter 10, selecting a proper range (alternating current 1mA), initializing the infrared imaging camera 5, adjusting the focal length to enable imaging to be clear, and resetting the display 12 through acousto-optic alarm.
And 6: and pulling the grounding wire open, manually adjusting the voltage regulator 1 to slowly boost at the speed of 1kV/s, and observing the reading of a voltmeter of the voltage divider 3 in the boosting process until 12kV is reached, and then carrying out withstand voltage for 1 min.
And 7: within the 1min, whether the display 12 gives an alarm or not is noticed, if the alarm is given, the insulator corresponding to the alarm is judged to be unqualified if the insulator sample number giving attention to the alarm is given.
And 8: if the insulator exceeding the infrared remote control current threshold value by 500 microamperes exists within 1min, the insulator is automatically disconnected corresponding to the infrared remote control switch 6, the sample is unqualified, and other samples continue to be tested.
And step 9: if the sample is punctured instantly, the residual current operated relay 13 is operated to trip in consideration of the reasons of protecting equipment and personnel, and the experiment is ended.
Step 10: if the tripping condition of the residual current-free action relay 13 occurs, after 1min, the manual operation is reduced to zero, the power is off, the ground wire is connected, the display 12 is recorded to alarm the serial number of the insulator or the infrared remote control switch 6 is switched off the serial number of the insulator or the serial number of the insulator is punctured (the punctured insulator can be obviously blackened and has holes).
Step 11: and after the test of the insulator sample is finished, replacing the next batch of insulation samples, and finishing the test of all insulators to be tested within 3 hours after the insulators to be tested are taken out from the boiling container.
In the description of the present invention, it should be noted that the terms "upper", "lower", "top/bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the test platform can simultaneously perform water diffusion tests on 6 tested insulator with sheathed core rods, the number 6 is only an example of the present invention, and those skilled in the art can change the number of the tested insulators within the protection scope of the present invention.
The above description is for the purpose of illustrating embodiments of the invention and is not intended to limit the invention, and it will be apparent to those skilled in the art that any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the invention shall fall within the protection scope of the invention.
Claims (7)
1. A test platform for a composite insulator with a sheath core rod water diffusion test is characterized by comprising a voltage regulator, a test transformer, a voltage divider, a test bed, an upper polar plate, a lower polar plate, an insulating support, a digital microammeter, a residual current action relay, an infrared remote control switch, a display, an infrared imaging camera and a controller; the test transformer is connected with the voltage regulator and the voltage divider, the voltage regulator, the test transformer and the voltage divider form a boosting system, the voltage is changed by adjusting the voltage regulator, and the test transformer boosts the voltage to a test voltage; the test bed is provided with a high-voltage lead input end and a plurality of high-voltage lead output ends, the voltage divider is connected with the high-voltage lead input end of the test bed, the infrared remote control switch is connected with the high-voltage lead output end and an upper polar plate of the test bed, the lower polar plate is connected with the digital microammeter, and the digital microammeter is connected with the controller; the top end of the test bed is provided with an infrared imaging camera, the insulating support is used for supporting a lower polar plate, the residual current operated relay is installed in a power supply box and is provided with an operating current threshold, and the operating time is quick-operating without delay; the display is connected with the infrared imaging camera and the controller, receives image signals collected by the infrared imaging camera and data of the controller, and controls the infrared remote control switch to be switched on and off; the controller collects the current of the insulator to be detected, an infrared remote control current threshold value is set, when the current value of the insulator to be detected collected by the controller is larger than the infrared remote control current threshold value, the controller controls the infrared remote control switch to be switched off, data processing is carried out, and data are transmitted to the display.
2. The test platform for the composite insulator with jacket core rod water diffusion test of claim 1, wherein: the infrared imaging camera has a temperature abnormal rise alarm function, an abnormal temperature rise threshold value is set, when the abnormal temperature rise exceeds the abnormal temperature rise threshold value, a temperature abnormal rise alarm is sent, the insulator to be tested corresponding to the temperature abnormal rise alarm is unqualified, and the insulator to be tested corresponding to the temperature abnormal rise alarm is not qualified; the visual angle of the infrared imaging camera is enough to enable all insulators to be detected to be reflected into the infrared imaging camera.
3. The test platform for the composite insulator with jacket core rod water diffusion test of claim 1, wherein: the display displays microammeter-time line graphs of the insulators to be tested and has an acousto-optic alarm function, if the current value of the insulator to be tested rises all the time, the display sends an acousto-optic alarm corresponding to the numbering sub-window, if the insulator to be tested exceeds an infrared remote control current threshold value, the display also sends an acousto-optic alarm corresponding to the numbering sub-window, the insulator to be tested corresponding to the acousto-optic alarm is judged to be unqualified, and the insulator to be tested corresponding to no acousto-optic alarm is judged to be qualified.
4. The test platform for the composite insulator with jacket core rod water diffusion test of claim 1, wherein: and the mounting position of the infrared imaging camera adopts an insulating material.
5. The test platform for the composite insulator with jacket core rod water diffusion test of claim 1, wherein: and the installation positions of the high-voltage lead input end and the plurality of high-voltage lead output ends of the test bed are made of insulating materials.
6. The test platform for the composite insulator with jacket core rod water diffusion test of claim 1, wherein: the upper polar plate and the lower polar plate form a movable polar plate for fixing an insulator to be tested, and the installation position of the lower polar plate is made of insulating materials, so that the current is prevented from flowing into the ground, and the test result is prevented from being influenced.
7. The test platform for the composite insulator with jacket core rod water diffusion test of claim 6, wherein: the upper polar plate and the lower polar plate form a capacitor, the voltage divider is provided with a voltmeter and used for accurately measuring the load voltage, and the influence of a capacitance-rise effect is reduced by adjusting the voltage.
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| 复合绝缘子芯棒和护套界面缺陷的影响因素及其发展过程研究;华奎;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》;20200115(第01期);C042-361 * |
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