CN208432654U - Dynamic measurement system for polarization-depolarization current of double-layer dielectric interface - Google Patents
Dynamic measurement system for polarization-depolarization current of double-layer dielectric interface Download PDFInfo
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- CN208432654U CN208432654U CN201820978676.1U CN201820978676U CN208432654U CN 208432654 U CN208432654 U CN 208432654U CN 201820978676 U CN201820978676 U CN 201820978676U CN 208432654 U CN208432654 U CN 208432654U
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- 238000005259 measurement Methods 0.000 title claims abstract description 22
- 230000001681 protective effect Effects 0.000 claims abstract description 9
- 239000010410 layer Substances 0.000 claims description 30
- 238000002955 isolation Methods 0.000 claims description 11
- 238000012360 testing method Methods 0.000 claims description 7
- 239000002355 dual-layer Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 9
- 238000001035 drying Methods 0.000 description 11
- 230000010287 polarization Effects 0.000 description 9
- 239000002131 composite material Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000028161 membrane depolarization Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 208000028659 discharge Diseases 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
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Abstract
The utility model discloses a dynamic measurement system for polarization-depolarized current of a double-layer dielectric interface, which comprises a three-electrode system, a switch device, a high-voltage power supply, an electrometer, a GPIB wire and a control computer; the high-voltage pole of the three-electrode system is connected with the positive pole of a high-voltage power supply through a switching device, the negative pole of the high-voltage power supply is connected with the input of an electrometer, the output of the electrometer is connected with the measuring pole of the three-electrode system, meanwhile, the electrometer is connected with a control computer through a GPIB (general purpose interface bus) line, and the protective pole of the three-electrode system is grounded. The high-voltage pole, the protective pole and the measuring pole of the three-electrode system are used for placing a double-layer medium object to be measured, the electrometer is used for measuring current, and the control computer is used for collecting the measured current and carrying out related data processing. The measurement system can capture the interface polarization-depolarization initial current of the pressurized double-layer medium object to be measured, and simultaneously, the current in the interface polarization-depolarization process is continuously and automatically measured and recorded, so that the human error is reduced.
Description
Technical Field
The utility model relates to a dynamic current test field especially relates to a double dielectric interface polarization-depolarized current dynamic measurement system.
Background
Part of the insulation structure of the electrical equipment is formed by combining two or more layers of insulation media, and the interface interlayer polarization phenomenon exists in a composite insulation structure formed by double-layer insulation materials with different properties. The interface of the composite insulating structure of the double-layer medium is a weak link in an insulating system and a typical part which is easy to malfunction. At present, the research on the double-layer medium interface relates to the measurement of interface charges, the charges at the interface are not easy to capture, and the electric field in the interface polarization process cannot be measured, so that the method is used for researching the polarization rule of the nonlinear layer medium interface by monitoring the polarization and depolarization current changes in the double-layer composite medium polarization process. However, the current measurement means and device are difficult to obtain the initial polarization current and the initial depolarization current of the interface interlayer polarization, and the current value cannot be continuously and automatically read in real time, so that the test result cannot truly and accurately reflect the process of the interface polarization. The measurement method is susceptible to manual operation.
Disclosure of Invention
The embodiment of the utility model provides a shortcoming to above-mentioned prior art, the embodiment of the utility model provides a double-deck medium interface polarization-depolarizing current dynamic measurement system makes measurement system can catch the interface polarization-depolarizing initial current after the double-deck medium determinand is pressurizeed, carries out continuous automatic measurement and record to the electric current of interface polarization-depolarization in-process simultaneously, reduces human error.
In order to achieve the above object, the utility model provides a polarization-depolarized current dynamic measurement system with double-layer dielectric interface, which comprises a three-electrode system, a switch device, a high-voltage power supply, an electrometer, a GPIB wire and a control computer; wherein,
the high-voltage pole of the three-electrode system is connected with the positive pole of the high-voltage power supply through the switching device, the negative pole of the high-voltage power supply is connected with the input of the electrometer, the output of the electrometer is connected with the measuring pole of the three-electrode system, the GPIB interface of the electrometer is connected with the control computer through a GPIB line, and the protective pole of the three-electrode system is grounded.
Preferably, the three-electrode system is arranged in an electrode box, and the outer surface of the electrode box is grounded.
Preferably, the electrode box is placed in a drying box, and the outer surface of the drying box is grounded.
Preferably, the diameter of the high voltage electrode of the three-electrode system is smaller than that of the double-layer medium object to be measured.
Preferably, the high-voltage power supply and the electrometer are both arranged in an isolation box, and the isolation box is grounded.
Preferably, the electrometer is Keithley 6517B.
Preferably, the control computer is provided with a LabVIEW virtual oscilloscope program.
Implement the embodiment of the utility model provides a, following beneficial effect has: the diameter of a high-voltage electrode of the three-electrode system is smaller than that of the object to be tested of the double-layer medium, and the electrode box, the drying box and the isolation box are grounded to shield weak interference current, so that weak body current passing through the object to be tested of the double-layer medium can be acquired; the electrometer is connected with the control computer through a GPIB line, and a LabVIEW virtual oscilloscope program in the control computer records the current collected by the electrometer in real time. The measuring system can capture the interface polarization-depolarization initial current of the pressurized double-layer medium object to be measured, and simultaneously, the current in the interface polarization-depolarization process is continuously and automatically measured and recorded, so that the human error is reduced.
Drawings
FIG. 1 is a schematic diagram of a dynamic measurement system for polarization-depolarization current of a bi-layer dielectric interface according to the present embodiment;
FIG. 2 is a control and display interface of the control computer provided in the present embodiment;
fig. 3 is a flowchart of a dynamic measurement method of polarization-depolarization current of a bi-layer dielectric interface according to this embodiment.
The system comprises a three-electrode system 1, a protective electrode 11, a measuring electrode 12, a high-voltage electrode 13, an electrode box 2, a drying box 3, a double-layer medium object to be measured 4, a high-voltage power supply 5, an electrometer 6, a GPIB wire 7, a control computer 8 and an isolation box 9.
Detailed Description
The utility model provides a double-layer dielectric interface polarization-depolarized current dynamic measurement system, as shown in figure 1, comprising a three-electrode system 1, a switch device, a high-voltage power supply 5, an electrometer 6, a GPIB wire 7 and a control computer 8; wherein,
the device is characterized in that a double-layer medium object to be measured 4 is placed between a high-voltage pole 13 and a protective pole 11 of the three-electrode system 1 and a measuring pole 12, the switching device is a single-pole double-throw switch, one end of the high-voltage pole 13 of the three-electrode system 1, which is output through the single-pole double-throw switch, is connected with an anode of the high-voltage power supply 5, the other end of the output through the single-pole double-throw switch, is connected with a cathode of the high-voltage power supply 5, the cathode of the high-voltage power supply 5 is connected with an input of the electrometer 6, the output of the electrometer 6 is connected with the measuring pole 12 of the three-electrode system 1, a GPIB interface of the electrometer 6 is connected with the control computer 8 through a GPIB line 7, and.
In an alternative embodiment, the three-electrode system 1 is placed in an electrode cartridge 2, and the outer surface of the electrode cartridge 2 is grounded.
In an alternative embodiment, the electrode cartridge 2 is placed in the drying box 3, and the outer surface of the drying box 3 is grounded.
In an alternative embodiment, the diameter of the high voltage electrode 13 of the three-electrode system 1 is smaller than the diameter of the double-layer dielectric test object 4.
In an alternative embodiment, the high-voltage power supply 5 and the electrometer 6 are both arranged in an isolation box 9, the isolation box 9 is grounded, and the high-voltage power supply 5 comprises a high-voltage power supply 5 with adjustable positive and negative polarities.
In an alternative embodiment, the electrometer 6 is Keithley 6517B.
In an alternative embodiment, the control computer 8 is equipped with a LabVIEW virtual oscilloscope program.
The following detailed description of the operation process of the polarization-depolarized current dynamic measurement system with the structure diagram of fig. 1, the control and display interface of fig. 2 and the flowchart of fig. 3 is as follows:
s1, placing a double-layer medium object to be measured 4 between a high-voltage electrode 13, a protective electrode 11 and a measuring electrode 12 of a three-electrode system 1 in an electrode box 2, connecting the high-voltage electrode 13 and a switching device of the three-electrode system 1, the other end of the switching device with the positive electrode of a high-voltage power supply 5, the negative electrode of the high-voltage power supply 5 with an input of an electrometer 6, an output of the electrometer 6 and the measuring electrode 12 of the three-electrode system 1 through leads, and grounding the protective electrode 11, the electrode box 2, a drying box 3 and an isolation box 9 of the three-electrode system 1. The electrode cartridge 2 is then placed in a drying cabinet 3 for the purpose of double shielding. Meanwhile, a GPIB interface of the electrometer 6 is connected with the control computer 8 through a GPIB line 7. The high voltage power supply 5 and the electrometer 6 are both placed in an isolation box 9 to shield the environment from electromagnetic interference.
And S2, adjusting the temperature of the drying box 3 to the temperature required by the experiment, standing for 20 minutes, adjusting the temperature of the double-layer medium object to be detected 4 to the temperature of the drying box 3, and keeping the temperature stable. If the measurement condition is room temperature, no temperature adjustment is required.
S3, grounding the test ground and the protective ground of the Keithly6517B type electrometer 6, starting Keithly6517B, and completing automatic debugging; then starting a LabVIEW operation program in the control computer 8, completing the initialization of the instrument, setting the high-voltage power supply 5 as the voltage required by the experiment, and sequentially clicking control buttons of the LabVIEW operation program and operation, output and recording buttons on a display panel; the single-pole double-throw switch is connected to K1 and is connected to a high-voltage power supply 5. The LabVIEW operating program firstly collects current and time data measured by the electrometer 6517B, then converts the collected character data into digital data, then stores experimental data, and finally displays the data on an interface according to a graph form set by the program. The control and display interface displays the change of the collected current with time, namely the polarization current, as shown in fig. 2.
If the polarity of the high-voltage power supply 5 needs to be changed, the wiring of the power supply can be changed; or the connection is not changed, and only the button of changing the polarity on the control and display panel is clicked.
S4, restarting the LabVIEW operation program in the control computer 8 after the polarized current test is finished, completing the initialization of the instrument, and sequentially clicking the operation, output and recording buttons on the control and display interface of the LabVIEW operation program; the single pole double throw switch is connected to K2, disconnecting the high voltage power supply 5. The LabVIEW operating program firstly collects current and time data measured by the electrometer 6517B, then converts the collected character data into digital data, then stores experimental data, and finally displays the data on an interface according to a graph form set by the program. The control and display panel displays the change of the collected current along with time, namely the depolarized current.
And S5, after the depolarization current test is finished, closing the equipment. And performing discharge treatment on the double-layer dielectric object to be measured 4.
Implement the embodiment of the utility model provides a, following beneficial effect has: the diameter of a high-voltage electrode 13 of the three-electrode system 1 is smaller than that of the double-layer medium object to be measured 4, the electrode box 2, the drying box 3 and the isolation box 9 are grounded to shield weak interference current, and weak body current passing through the double-layer medium object to be measured 4 can be acquired; the electrometer 6 is connected with a control computer 8 through a GPIB (general purpose interface bus) line 7, and a LabVIEW virtual oscilloscope program in the control computer 8 records the current collected by the electrometer 6 in real time. The measuring system can capture the interface polarization-depolarization initial current of the pressurized double-layer medium object to be measured 4, and simultaneously automatically and continuously measure and record the current in the interface polarization-depolarization process, thereby reducing human errors.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the scope of the invention. Any person skilled in the art can make some modifications without departing from the scope of the present invention, i.e. all equivalent modifications made according to the present invention should be covered by the scope of the present invention.
Claims (7)
1. A dynamic measurement system for polarization-depolarized current of a bilayer dielectric interface, comprising: the system comprises a three-electrode system, a switching device, a high-voltage power supply, an electrometer, a GPIB wire and a control computer; wherein,
the high-voltage pole of the three-electrode system is connected with the positive pole of the high-voltage power supply through the switching device, the negative pole of the high-voltage power supply is connected with the input of the electrometer, the output of the electrometer is connected with the measuring pole of the three-electrode system, the GPIB interface of the electrometer is connected with the control computer through a GPIB line, and the protective pole of the three-electrode system is grounded.
2. The bi-layer dielectric interface polarization-depolarized current dynamic measurement system of claim 1, wherein said three-electrode system is disposed in an electrode cartridge, the outer surface of the electrode cartridge being grounded.
3. The bi-layer dielectric interface polarization-depolarized current dynamic measurement system of claim 2, wherein said electrode cartridge is disposed in a dry box, an outer surface of the dry box being grounded.
4. The bi-layer dielectric interface polarization-depolarized current dynamic measurement system of claim 1, wherein a diameter of a high voltage pole of said three-electrode system is smaller than a diameter of said bi-layer dielectric test object.
5. The dual-layer dielectric interface polarization-depolarized current dynamic measurement system of claim 1, wherein said high voltage power supply and said electrometer are all disposed in an isolation box, said isolation box being grounded.
6. The bi-layer dielectric interface polarization-depolarized current dynamic measurement system of claim 1, wherein said electrometer is Keithley 6517B.
7. The bi-layer dielectric interface polarization-depolarized current dynamic measurement system of claim 1, wherein said control computer is installed with a LabVIEW virtual oscilloscope program.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820978676.1U CN208432654U (en) | 2018-06-25 | 2018-06-25 | Dynamic measurement system for polarization-depolarization current of double-layer dielectric interface |
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| CN201820978676.1U CN208432654U (en) | 2018-06-25 | 2018-06-25 | Dynamic measurement system for polarization-depolarization current of double-layer dielectric interface |
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