CN114325263A - Full-size insulation component insulation performance test system and method based on high-voltage pulse - Google Patents
Full-size insulation component insulation performance test system and method based on high-voltage pulse Download PDFInfo
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- CN114325263A CN114325263A CN202111600122.0A CN202111600122A CN114325263A CN 114325263 A CN114325263 A CN 114325263A CN 202111600122 A CN202111600122 A CN 202111600122A CN 114325263 A CN114325263 A CN 114325263A
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- 238000009413 insulation Methods 0.000 title claims abstract description 196
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000011056 performance test Methods 0.000 title description 7
- 238000012360 testing method Methods 0.000 claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical compound [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 claims description 3
- 238000011156 evaluation Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 description 9
- 239000011810 insulating material Substances 0.000 description 7
- 239000000523 sample Substances 0.000 description 6
- 239000012774 insulation material Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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Abstract
The invention provides a system and a method for testing the insulation performance of a full-size insulation component based on high-voltage pulse, and mainly solves the problems that the existing scaling dimension insulation test result cannot be popularized and applied to the full-size insulation component, and further cannot effectively obtain the insulation performance of the full-size insulation component. The system comprises a grading ring, an anode plate, a cathode plate, an outer cylinder, a high-voltage pulse source, a first capacitive voltage divider and a second capacitive voltage divider; the tested full-size insulation component is of an annular structure and is alternately arranged with the equalizing ring along the axial direction at intervals to form an insulation stack to be tested; the anode plate and the cathode plate are respectively arranged at two ends of the insulation stack to be tested; the insulation stack to be tested, the anode plate and the cathode plate are all arranged in the outer barrel; the output end of the high-voltage pulse source is electrically connected with the insulation stack to be tested through the cathode plate; the first capacitive voltage divider is arranged at the output end of the high-voltage pulse source; the second capacitive voltage divider is arranged on the outer wall of the outer cylinder.
Description
Technical Field
The invention belongs to the field of insulation material insulation performance detection, and particularly relates to a full-size insulation component insulation performance test system and method based on high-voltage pulse.
Background
The insulating material is widely applied in the fields of high-power microwave devices, pulse power devices, high-voltage insulation and the like, and the insulating property of the insulating material is very important for the reliable operation of the devices and the devices. However, the insulation properties of different sized insulation parts have significant differences, and especially for full sized insulation parts used in devices, the insulation properties are more difficult to predict.
Presently, insulation components can be tested using scaled-down insulation tests. However, the test mode cannot be compared with the relevant parameters of the full-size insulation assessment test in the aspects of structure, voltage level, electric field intensity of three-joint-point area and the like, so that the test result of the scaled sample cannot be popularized and applied to the full-size insulation part. Particularly, aiming at the research and the model selection of novel insulating materials, the full-size insulating part examination test is very important. Therefore, how to effectively detect the insulation performance of the full-size insulation part of the device, especially the insulation performance of the full-size insulation part under the high-voltage pulse condition, has become a current research hotspot.
Disclosure of Invention
The invention aims to solve the problems that the existing shrinkage-size insulation test result cannot be popularized and applied to a full-size insulation part and further cannot effectively obtain the insulation performance of the full-size insulation part, and therefore the full-size insulation part insulation performance test system and method based on high-voltage pulses are provided. The system is a full-size insulation part insulation performance examination and test system, and provides a method for judging whether the insulation performance of the material is good or bad.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a full-size insulation component insulation performance test system based on high-voltage pulse comprises a grading ring, an anode plate, a cathode plate, an outer cylinder, a high-voltage pulse source, a first capacitive voltage divider and a second capacitive voltage divider; the tested full-size insulation component is of an annular structure and is alternately arranged with the equalizing ring along the axial direction at intervals to form an insulation stack to be tested; the anode plate and the cathode plate are respectively arranged at two ends of the insulation stack to be tested and form a vacuum cavity with the insulation stack to be tested, and the anode plate is provided with an interface for vacuumizing; the insulation stack to be tested, the anode plate and the cathode plate are all arranged in the outer cylinder body, and transformer oil is injected into the outer cylinder body and the outer side of the vacuum cavity; the high-voltage pulse source is arranged on one side of the outer cylinder, and the output end of the high-voltage pulse source is electrically connected with the insulation stack to be tested through the cathode plate; the first capacitive voltage divider is arranged at the output end of the high-voltage pulse source and used for acquiring the voltage of the output end of the high-voltage pulse source; and the second capacitive voltage divider is arranged on the outer wall of the end face of the outer cylinder and is used for acquiring the voltage of the insulation stack to be tested.
Furthermore, a water resistance voltage divider is arranged on the outer wall of the outer cylinder body and used for carrying out online calibration on the first capacitive voltage divider and the second capacitive voltage divider.
Furthermore, a matched load is further arranged on the output end of the high-voltage pulse source, the cathode of the matched load is electrically connected with the cathode plate, and the anode of the matched load is electrically connected with the anode plate and used for providing stable output waveforms for the insulation stack to be tested.
Furthermore, the output end of the high-voltage pulse source is electrically connected with the cathode plate through a beryllium copper elastic sheet.
Furthermore, the anode plate and the cathode plate are respectively provided with a connecting hole, and the insulating pull rod penetrates through the connecting holes on the anode plate and the cathode plate to axially fixedly connect the anode plate, the insulating ring, the equalizing ring and the cathode plate.
Meanwhile, the invention also provides a method for testing the insulation performance of the full-size insulation part based on the high-voltage pulse, which comprises the following steps:
step one, processing a full-size insulating part into an annular structure;
step two, alternately installing full-size insulation components and grading rings at intervals along the axial direction to form an insulation stack to be tested, respectively arranging anode plates and cathode plates at two ends of the insulation stack to be tested to form a vacuum cavity together with the insulation stack to be tested, and then placing the insulation stack to be tested, the anode plates and the cathode plates in the outer cylinder;
thirdly, electrically connecting the output end of the high-voltage pulse source with the insulation stack to be tested, and then injecting transformer oil into the inner side of the outer cylinder and the outer side of the insulation stack to be tested until the outer cylinder and the insulation stack to be tested are filled with the transformer oil;
step four, vacuumizing a vacuum cavity formed by the anode plate, the cathode plate and the insulation stack to be tested, and vacuumizing the vacuum cavity to 1.0 multiplied by 10-2Pa below;
step five, gradually increasing the output voltage of the high-voltage pulse source, and respectively carrying out online monitoring on the output end of the high-voltage pulse source and the voltage of the insulation stack to be tested through the first capacitive voltage divider and the second capacitive voltage divider;
and step six, obtaining a voltage enhancement factor according to the voltage of the high-voltage pulse source output end and the voltage of the insulation stack to be detected, which are obtained in the step five, wherein the voltage enhancement factor is the ratio of the voltage of the insulation stack to be detected to the voltage of the high-voltage pulse source output end, and obtaining the insulation performance of the full-size insulation part according to the voltage enhancement factor.
Further, in the step one, a calibration step is also included: and a water resistance voltage divider is arranged on the side wall of the outer cylinder body and is used for carrying out online calibration on the first capacitive voltage divider and the second capacitive voltage divider.
Further, the step one also comprises the step of cleaning the full-size insulating part: and cleaning the surface of the processed full-size insulating part by adopting absolute ethyl alcohol.
Further, in the second step, the metal conducting ring is adopted to replace a full-size insulating part, so that the number of the full-size insulating part and the evaluation test voltage level can be adjusted.
Compared with the prior art, the technical scheme of the invention has the advantages that,
1. the invention provides a system and a method for testing the insulation performance of a full-size insulation component under a high-voltage pulse condition, wherein the system and the method are a real, effective, visual and reliable method, can effectively master the vacuum edge insulation performance of an insulation material under the high-voltage pulse condition, and provide guidance for the type selection of the insulation component of a device and the research and development of a new material under the high-voltage pulse condition.
2. The test system simulates the electromagnetic field environment around the insulation stack in the actual operation of the device in high fidelity, and has higher test efficiency; meanwhile, the testing method provided by the invention obtains the electric field intensity of the full-size insulation stack in actual operation, and the testing result is accurate and reliable.
Drawings
FIG. 1 is a schematic diagram of a system for testing the insulation performance of a full-scale insulation component based on high-voltage pulses according to the present invention;
FIG. 2 is an enlarged view of a portion of an insulation stack under test in the test system of the present invention.
Reference numerals: 1-grading ring, 2-anode plate, 3-cathode plate, 4-outer cylinder, 5-high voltage pulse source, 6-first capacitive voltage divider, 7-second capacitive voltage divider, 8-tested full-size insulation component, 9-water resistive voltage divider, 10-matching load and 12-insulation pull rod.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention and are not intended to limit the scope of the present invention.
The invention provides a system and a method for testing the insulation performance of a full-size insulation component based on high-voltage pulse, in particular to a method for detecting the insulation performance of a vacuum edge surface of a full-size insulation stack under the condition of high-voltage pulse, which comprises the following steps: processing an insulating material into a full-size insulating part, assembling the insulating part with a grading ring to form an insulating stack to be tested, fixedly placing the insulating stack in an outer cylinder body, connecting the insulating stack with an output end of a high-voltage pulse source to form a full-size insulating performance testing system, and respectively obtaining the voltage of the output end of the high-voltage pulse source and the voltage of the insulating stack to be tested through two capacitive voltage dividers so as to obtain the ratio of the voltage of the insulating stack to be tested to the output voltage of the high-voltage pulse source and further obtain the insulating performance of the material. The method is visual and effectively combined with the use environment of the insulating part, the real insulating performance of the insulating part is reflected in a 1:1 full size, and an assessment platform and a method are provided for the model selection of the insulating part and the development of a new material under the condition of high-voltage pulse.
The system and the method of the invention have the following principles: the peak voltage of the insulation stack to be tested is obviously higher than the peak voltage of the output end of the pulse source due to the fact that impedance of the insulation stack to be tested (high resistance) is not matched with impedance of the output end (low resistance) of the high-voltage pulse source, the ratio of the peak voltage of the insulation stack to be tested to the peak voltage of the output end of the high-voltage pulse source is defined as a voltage enhancement factor (delta), and if the insulation component of the insulation stack to be tested does not generate vacuum surface sliding flash, the voltage enhancement factor is higher than the voltage enhancement factor which generates vacuum surface sliding flash times.
As shown in fig. 1 and 2, the system for testing the insulation performance of the full-size insulation component based on the high-voltage pulse provided by the invention comprises a grading ring 1, an anode plate 2, a cathode plate 3, an outer cylinder 4, a high-voltage pulse source 5, a first capacitive voltage divider 6, a second capacitive voltage divider 7 and a water resistance voltage divider 9. The tested object is a full-size insulating part, the tested object is processed into an annular structure during testing, and the full-size insulating part and the grading ring 1 are alternately arranged at intervals along the axial direction to form an insulating stack to be tested; and then, arranging the anode plate 2 and the cathode plate 3 at two ends of the insulation stack to be tested respectively to form a vacuum cavity with the insulation stack to be tested. Specifically, the anode plate 2 and the cathode plate 3 are connected as follows: connecting holes can be respectively arranged on the anode plate 2 and the cathode plate 3, and the insulating pull rod 12 penetrates through the connecting holes on the anode plate 2 and the cathode plate 3 to axially fixedly connect the anode plate 2, the equalizing ring 1, the full-size insulating part and the cathode plate 3. The anode plate 2 is provided with an interface for vacuumizing the vacuum cavity, and the interface is connected with external vacuum equipment (such as a vacuum pump) and used for vacuumizing the vacuum cavity during testing.
The outer cylinder 4 is used for fixedly mounting an insulation stack to be tested, the anode plate 2 and the cathode plate 3 are all arranged in the outer cylinder 4, and transformer oil is injected into the outer cylinder 4 and outside the vacuum cavity; the high-voltage pulse source 5 is arranged on one side of the cathode plate 3 of the insulation stack to be tested, the output end of the high-voltage pulse source is electrically connected with the insulation stack to be tested through the cathode plate 3, and particularly, the output end of the high-voltage pulse source 5 is electrically connected with the cathode plate 3 through a beryllium copper elastic sheet. The first capacitive voltage divider 6 is arranged on the outer wall of the output end of the high-voltage pulse source 5 and used for acquiring the voltage of the output end of the high-voltage pulse source 5; and the second capacitive voltage divider 7 is arranged on the outer wall of the outer cylinder 4 and used for acquiring the voltage of the insulation stack to be tested. In addition, seal grooves are formed in the end faces of two sides of the grading ring 1, and seal rings are arranged in the seal grooves and used for sealing the vacuum environment inside the insulation stack to be tested. Meanwhile, the inner side surfaces of the anode plate 2 and the cathode plate 3, which are in contact with the full-size insulation part to be measured, are provided with sealing grooves, and sealing rings are arranged in the sealing grooves and are also used for sealing the vacuum environment in the insulation stack to be measured.
The output end of the high-voltage pulse source 5 is also provided with a matched load 10, the cathode of the matched load 10 is electrically connected with the cathode plate 3 (high-voltage end), and the anode of the matched load 10 is electrically connected with the anode plate 2 (low-voltage end at the same time) and used for providing stable output waveforms for the insulation stack to be tested. The matching load 10 may specifically be an annular water resistor (the center is a high-voltage end, one end is connected to the high-voltage pulse source 5, the other end is connected to the negative plate 3 of the insulation stack to be tested, and the outer ring is a low-voltage end and grounded) with a resistance value of 5 ohms, and is connected in parallel with the insulation stack to be tested.
Because the test system has a large size, the standard voltage probe cannot realize the online calibration of the first capacitive voltage divider 6 and the second capacitive voltage divider 7, and therefore the online calibration of the first capacitive voltage divider 6 and the second capacitive voltage divider 7 is indirectly realized through the water resistance voltage divider 9. The water resistance voltage divider 9 is an electrical parameter measurement and diagnosis device, is arranged on the outer wall of the outer cylinder 4, and is used for calibrating the first capacitive voltage divider 6 and the second capacitive voltage divider 7 before testing, so that the voltage data acquired by the first capacitive voltage divider 6 and the second capacitive voltage divider 7 are more accurate.
The calibration process of the water resistance voltage divider 9 is as follows: firstly, a water resistance voltage divider 9 with the resistance value of about 1500 ohms is configured, and the water resistance voltage divider is passed throughThe movable high-voltage power supply utilizes a Northstar standard voltage probe (PVM-6, the voltage division coefficient is 1000:1) and a gas switch to calibrate the water resistance voltage divider 9 to obtain the voltage division coefficient. Pulse signals with different amplitudes are generated by controlling the output voltage of the movable high-voltage power supply and the air pressure of the air switch. Recording the amplitude (U) of the voltage waveform measured by the Northstar standard voltage probe and the amplitude (U) of the voltage waveform measured by the water resistance voltage divider 9 by an oscilloscope respectively1Several sets of data) to find the voltage division coefficient of the water resistance voltage divider 9 as
The inner side of the outer cylinder 4 and the outer side of the insulation stack to be tested are filled with transformer oil, and the output end of the high-voltage pulse source 5 is filled with deionized water. And inserting the calibrated water resistance voltage divider 9 into the outer cylinder 4 (electrically connected with the cathode plate 3), and calibrating the first capacitive voltage divider and the second capacitive voltage divider on line by using the calibrated water resistance voltage divider 9 through the mobile high-voltage power supply/gas switch to obtain the voltage division coefficient of the first capacitive voltage divider and the second capacitive voltage divider. The calibration process of the capacitive voltage divider is similar to that of the water resistance voltage divider 9, and the water resistance voltage divider 9 is used as a standard probe.
Based on the system, the invention also provides a method for testing the insulation performance of the full-size insulation part based on the high-voltage pulse, which comprises the following steps:
step one, processing a full-size insulating part into an annular structure to obtain a sample to be detected;
step two, alternately assembling and mounting the full-size insulation parts and the grading rings 1 at intervals along the axial direction to form an insulation stack to be tested, respectively arranging the anode plates 2 and the cathode plates 3 at two ends of the insulation stack to be tested, forming a vacuum cavity by the anode plates 2 and the cathode plates 3 and the insulation stack to be tested, and then placing the insulation stack to be tested, the anode plates 2 and the cathode plates 3 in the outer cylinder 4; the mounting number of the full-size insulating parts is adjustable, and the rest parts can be replaced by metal conducting rings;
step three, fixedly placing the outer cylinder 4 at the output end of the high-voltage pulse source 5, electrically connecting the output end of the high-voltage pulse source 5 with the insulation stack to be tested, and injecting transformer oil into the inner side of the outer cylinder 4 and the outer side of the insulation stack to be tested until the outer cylinder is filled with the transformer oil;
step four, vacuumizing a vacuum cavity formed by the anode plate 2, the cathode plate 3 and the insulation stack to be tested, namely vacuumizing the inner side of the insulation stack to be tested, wherein the vacuum degree of the inner side of the insulation stack to be tested needs to reach 1.0 multiplied by 10-2Pa below;
step five, a step-by-step boosting method is adopted, namely the output voltage of the high-voltage pulse source 5 is increased step by step, a withstand voltage examination test is carried out on the insulation stack to be tested through the high-voltage pulse source 5, and the output end of the high-voltage pulse source 5 and the voltage of the insulation stack to be tested are monitored on line through a first capacitive voltage divider 6 and a second capacitive voltage divider 7 respectively;
and step six, obtaining a voltage enhancement factor according to the voltage of the output end of the high-voltage pulse source 5 and the voltage of the insulation stack to be detected, which are obtained in the step five, wherein the voltage enhancement factor is the ratio of the voltage of the insulation stack to be detected and the voltage of the output end of the high-voltage pulse source 5, and analyzing according to the voltage enhancement factor to obtain the insulation performance of the insulation ring.
Under the same voltage level, the ratio of the voltage of the insulation stack to be tested to the output voltage of the high-voltage pulse source 5 is a fixed value, the larger the ratio is under different insulation materials and the same voltage level, the better the insulation performance of the material is, and if the ratio of the voltage of the insulation stack to be tested to the output voltage of the high-voltage pulse source is smaller, the voltage loss of the insulation stack to be tested is indicated, namely, the insulation failure (vacuum surface flashover) exists.
In the test process, the transformer oil is filled outside the insulation stack to be tested and keeps consistent with the actual use environment of the insulation stack to be tested, so that insulation breakdown caused by overhigh cathode feed voltage at the outer side of the insulation stack is avoided. The inner side of the insulation stack to be tested is kept in high vacuum, and is also kept consistent with the actual use environment of the device insulation stack, so that the reality and reliability of test data are ensured.
According to the full-size insulation part insulation performance test system, an examination test mode of assembling and mounting a plurality of metal pieces and insulation parts is innovatively designed according to the grade of the output voltage of the high-voltage pulse source 5 and the voltage-resistant condition of the insulation part, so that the insulation performance of the vacuum edge surfaces of insulation rings made of different materials can be really mastered.
The invention establishes a full-size insulation component insulation performance test system and method based on high-voltage pulse, verifies the feasibility of a full-size insulation component insulation performance examination test, is particularly suitable for full-size insulation component insulation detection under the high-voltage pulse condition, and describes the implementation process of the method in detail through the following embodiment, wherein the insulation materials are samples to be tested, specifically three, namely a polyethylene material A, a polyethylene material B and a polyethylene material C, and the method comprises the following specific implementation steps:
step one, processing the three insulating materials into a full-size insulating part according to the required size, and processing the insulating part into an annular structure to form an insulating ring to be tested;
step two, cleaning the surface of the full-size insulating part by adopting absolute ethyl alcohol, namely cleaning the insulating ring to be detected;
step three, assembling and installing 4 insulating rings to be tested, 4 metal aluminum rings (the size of which is consistent with that of the insulating rings to be tested) and 7 equalizing rings 1 to form an insulating stack to be tested, then respectively arranging an anode plate 2 and a cathode plate 3 at two ends of the insulating stack to be tested, forming a vacuum cavity by the anode plate 2, the cathode plate 3 and the insulating stack to be tested, and then placing the insulating stack to be tested, the anode plate 2 and the cathode plate 3 in an outer cylinder 4;
connecting the negative plate 3 of the insulation stack to be tested with the output end of the high-voltage pulse source 5, and connecting the vacuum unit with the through hole on the positive plate 2;
step five, injecting transformer oil into the inner side of the outer cylinder 4 and the outer side of the insulation stack to be tested until the outer cylinder is filled with the transformer oil; and vacuumizing the inner side of the insulation stack to be tested to 1.0 multiplied by 10 by a vacuum unit-2Below Pa, the vacuum unit is used for realizing and maintaining a high-vacuum environment in the insulation stack to be tested;
step six, working for 10 times under each voltage level by adopting a step-by-step boosting method, and carrying out a withstand voltage assessment test on the insulation stack to be tested through a high-voltage pulse source 5 at an interval of 30 minutes between every two times;
step seven, acquiring the voltage (V) at the output end of the high-voltage pulse source 5 through the first capacitive voltage divider 6 and the second capacitive voltage divider 71) And wait forMeasuring the voltage (V) of the insulation stack2) See table 1;
step eight, calculating to obtain the ratio (voltage enhancement factor delta) of the voltage of the insulation stack to be tested and the voltage of the output end of the high-voltage pulse source 5, and referring to table 1;
step nine, comparing the delta values of different insulating materials, and judging the quality of the insulating property, wherein the quality is shown in table 1;
TABLE 1 Voltage enhancement factor for different voltage classes of different insulating materials
The invention provides a system and a method for testing the insulation performance of a full-size insulation component, and defines a method for judging insulation failure (vacuum surface flashover) of the full-size insulation component. Compared with the traditional insulation test with the reduced dimension, the method truly and effectively reflects the actual use condition of the insulation part of the device. The full-size insulation part insulation performance examination test platform provides reliable guarantee for the selection of the insulation part of the device and the development of novel insulation materials.
Claims (9)
1. The utility model provides a full-scale insulating part insulating properties test system based on high-voltage pulse which characterized in that: the device comprises a grading ring (1), an anode plate (2), a cathode plate (3), an outer cylinder (4), a high-voltage pulse source (5), a first capacitive voltage divider (6) and a second capacitive voltage divider (7);
the tested full-size insulation component (8) is of an annular structure and is alternately arranged with the equalizing ring (1) along the axial direction at intervals to form an insulation stack to be tested;
the anode plate (2) and the cathode plate (3) are respectively arranged at two ends of the insulation stack to be tested, a vacuum cavity is formed between the anode plate (2) and the insulation stack to be tested, and an interface for vacuumizing is arranged on the anode plate (2);
the insulation stack to be tested, the anode plate (2) and the cathode plate (3) are all arranged in the outer cylinder body (4), and transformer oil is injected into the outer side of the vacuum cavity and inside the outer cylinder body (4);
the high-voltage pulse source (5) is arranged on one side of the outer cylinder body (4), and the output end of the high-voltage pulse source is electrically connected with the insulation stack to be tested through the cathode plate (3);
the first capacitive voltage divider (6) is arranged at the output end of the high-voltage pulse source (5) and is used for acquiring the voltage at the output end of the high-voltage pulse source (5);
and the second capacitive voltage divider (7) is arranged on the outer wall of the outer cylinder (4) and is used for acquiring the voltage of the insulation stack to be tested.
2. The high voltage pulse based full size insulation component insulation performance testing system of claim 1, wherein: and a water resistance voltage divider (9) is arranged on the outer wall of the outer barrel (4) and used for calibrating the first capacitive voltage divider (6) and the second capacitive voltage divider (7) on line.
3. The high voltage pulse based full size insulation component insulation performance testing system of claim 1, wherein: the high-voltage pulse source is characterized in that a matched load (10) is further arranged on the output end of the high-voltage pulse source (5), the cathode of the matched load (10) is electrically connected with the cathode plate (3), and the anode of the matched load (10) is electrically connected with the anode plate (2) and used for providing stable output waveforms for the insulation stack to be tested.
4. The high voltage pulse based full size insulation component insulation performance testing system of claim 1 or 2 or 3, wherein: the output end of the high-voltage pulse source (5) is electrically connected with the cathode plate (3) through a beryllium copper elastic sheet.
5. The high voltage pulse-based full-size insulation component insulation performance testing system of claim 4, wherein: the anode plate (2) and the cathode plate (3) are respectively provided with a connecting hole, the insulating pull rod (12) penetrates through the connecting holes in the anode plate (2) and the cathode plate (3), and the anode plate (2), the measured full-size insulating part (8), the equalizing ring (1) and the cathode plate (3) are axially fixedly connected.
6. A method for testing the insulation performance of a full-size insulation component based on high-voltage pulse is characterized by comprising the following steps:
step one, processing a full-size insulating part into an annular structure;
step two, alternately installing full-size insulation components and grading rings at intervals along the axial direction to form an insulation stack to be tested, respectively arranging anode plates and cathode plates at two ends of the insulation stack to be tested to form a vacuum cavity together with the insulation stack to be tested, and then placing the insulation stack to be tested, the anode plates and the cathode plates in the outer cylinder;
thirdly, electrically connecting the output end of the high-voltage pulse source with the insulation stack to be tested, and then injecting transformer oil into the inner side of the outer cylinder and the outer side of the insulation stack to be tested until the outer cylinder and the insulation stack to be tested are filled with the transformer oil;
step four, vacuumizing a vacuum cavity formed by the anode plate, the cathode plate and the insulation stack to be tested, and vacuumizing the vacuum cavity to 1.0 multiplied by 10-2Pa below;
step five, gradually increasing the output voltage of the high-voltage pulse source, and respectively carrying out online monitoring on the output end of the high-voltage pulse source and the voltage of the insulation stack to be tested through the first capacitive voltage divider and the second capacitive voltage divider;
and step six, obtaining a voltage enhancement factor according to the voltage of the high-voltage pulse source output end and the voltage of the insulation stack to be detected, which are obtained in the step five, wherein the voltage enhancement factor is the ratio of the voltage of the insulation stack to be detected to the voltage of the high-voltage pulse source output end, and obtaining the insulation performance of the full-size insulation part according to the voltage enhancement factor.
7. The method for testing the insulation performance of a full-size insulation part based on high-voltage pulses according to claim 6, wherein: in the first step, the method further comprises a calibration step: and a water resistance voltage divider is arranged on the side wall of the outer cylinder body and is used for carrying out online calibration on the first capacitive voltage divider and the second capacitive voltage divider.
8. The method for testing the insulation performance of a full-size insulation part based on high-voltage pulses according to claim 7, wherein: the first step also comprises the step of cleaning the full-size insulating part: and cleaning the surface of the processed full-size insulating part by adopting absolute ethyl alcohol.
9. The method for testing the insulation performance of a full-size insulation part based on high-voltage pulses according to claim 6, 7 or 8, characterized in that: in the second step, the metal conducting ring is adopted to replace a full-size insulating part, so that the number of the full-size insulating part and the evaluation test voltage level can be adjusted.
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| CN115863125A (en) * | 2022-10-31 | 2023-03-28 | 西北核技术研究所 | Integrated high-voltage vacuum insulation stack |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001174502A (en) * | 1999-12-14 | 2001-06-29 | Toshiba Corp | High-voltage test device |
| CN112462215A (en) * | 2020-11-26 | 2021-03-09 | 云南电网有限责任公司电力科学研究院 | Full-size cable insulation charge quantity test platform and method |
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2021
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| JP2001174502A (en) * | 1999-12-14 | 2001-06-29 | Toshiba Corp | High-voltage test device |
| CN112462215A (en) * | 2020-11-26 | 2021-03-09 | 云南电网有限责任公司电力科学研究院 | Full-size cable insulation charge quantity test platform and method |
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| CN115863125A (en) * | 2022-10-31 | 2023-03-28 | 西北核技术研究所 | Integrated high-voltage vacuum insulation stack |
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