CN111856223B - Composite interface partial discharge simulation system and composite interface partial discharge simulation method - Google Patents
Composite interface partial discharge simulation system and composite interface partial discharge simulation method Download PDFInfo
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- CN111856223B CN111856223B CN202010579368.3A CN202010579368A CN111856223B CN 111856223 B CN111856223 B CN 111856223B CN 202010579368 A CN202010579368 A CN 202010579368A CN 111856223 B CN111856223 B CN 111856223B
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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
- G01R31/1263—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 solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—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 solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R13/00—Arrangements for displaying electric variables or waveforms
- G01R13/02—Arrangements for displaying electric variables or waveforms for displaying measured electric variables in digital form
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The invention relates to a composite interface partial discharge simulation system and a composite interface partial discharge simulation method, wherein the composite interface partial discharge simulation system comprises: the sample group comprises a first sample and a second sample, and the first sample is abutted with the second sample to form a composite interface; the power supply input end is connected with the low voltage power supply, and the output voltage of the power supply can be adjusted; the simulation device is internally provided with a sample group; in the simulation state, a first sample is connected to a first high-voltage output end of a power supply through a simulation device, and a second sample is connected to a second high-voltage output end of the power supply through the simulation device and is grounded; the sample group and the connecting loop are all in an insulating environment; and the display assembly is in signal connection with the connecting loop and is used for collecting and displaying partial discharge signals at the composite interface. The invention reduces the simulation cost, reduces the trigger voltage when the partial discharge phenomenon occurs, and improves the safety in the simulation process.
Description
Technical Field
The invention relates to the technical field of test devices, in particular to a composite interface partial discharge simulation system and a composite interface partial discharge simulation method.
Background
In the fault statistical analysis of the high-voltage cable accessories, the probability of accessory breakdown caused by local defects in the composite interface of the cable accessories is highest. In the process of analyzing the high-frequency partial discharge of the high-voltage cable line, a standard map of the high-frequency partial discharge of the high-voltage cable line can be prepared based on a map sample of the high-frequency partial discharge of the high-voltage cable line composite interface. However, when preparing the high-frequency partial discharge map sample of the high-voltage cable circuit composite interface, the test can be completed by placing the high-voltage cable accessory in a 220KV high-voltage test system, and the high-voltage test system needs to be arranged in a high-voltage shielding test hall, so that the test safety performance is low, and meanwhile, the preparation cost of the map sample is increased.
Disclosure of Invention
In view of the above, it is desirable to provide a composite interface partial discharge simulation system and a composite interface partial discharge simulation method that can reduce the cost of a partial discharge test.
A composite interface partial discharge simulation system, comprising:
the sample group comprises a first sample and a second sample, and the first sample is abutted with the second sample to form a composite interface;
The power supply input end is connected with the piezoelectric power supply, and the output voltage of the power supply can be adjusted;
the simulation device is internally provided with the sample group; in an analog state, the first sample is connected to a first high-voltage output end of the power supply through the analog device, and the second sample is connected to a second high-voltage output end of the power supply through the analog device and grounded; the sample group and the connecting loop are all in an insulating environment;
and the display component is in signal connection with the connecting loop and is used for acquiring and displaying the partial discharge signals at the composite interface.
Further, in one embodiment, the simulation device includes a simulation assembly, a first electrode assembly, and a second electrode assembly;
one end of the first electrode assembly passes through the simulation assembly to be abutted to the outer side of the first sample, and the other end of the first electrode assembly is connected to the first high-voltage output end; one end of the second electrode assembly passes through the simulation assembly to be abutted to the outer side of the second sample, and the other end of the second electrode assembly is connected to the second end of the high-voltage output end and grounded;
the simulation assembly, the first electrode assembly, the second electrode assembly and the sample group together form a sample cavity for placing the sample group; the sample cavity, the first electrode assembly, and the second electrode assembly are in an insulating environment.
Further, in one embodiment, the simulation assembly includes a first simulation structure and a second simulation structure; the second end part of the second simulation structure is clamped to the first end part of the first simulation structure; the first electrode assembly passes through the first simulation structure and is abutted to the outer side of the first sample; the second electrode assembly passes through the second simulation structure and is abutted to the outer side of the second sample; the first electrode assembly, the second electrode assembly, the first dummy structure, and the second dummy structure collectively form the sample cavity.
Further, in one embodiment, a first test cavity is provided on an end face of the first end of the first analog structure; the inner surface of the first test cavity is communicated with the outer surface of the first simulation structure through a first oil inlet channel;
a second test cavity is arranged on the end face of the second end part of the second simulation structure, and the second end part is sleeved in the first test cavity of the first end part; the inner surface of the second test cavity is communicated with the outer surface of the second simulation structure through a second oil inlet channel;
The first electrode assembly passes through the first dummy structure and extends forward along the first test cavity; the second electrode assembly passes through the second dummy structure and extends forward along the second test cavity; the first oil inlet channel and the second oil inlet channel are filled with insulating oil, and the simulation assembly and the insulating oil jointly form an insulating environment.
Further, in one embodiment, the inner surface of the first test cavity extends toward the second analog structure to form a first clamp ring; the inner surface of the second test cavity extends towards the first simulation structure to form a second compression ring opposite to the axial position of the first compression ring; the first compression ring and the second compression ring are respectively abutted to two sides of the sample group.
Further, in one embodiment, the inner wall of the first compression ring is communicated with the outer wall of the first compression ring through a third oil inlet channel; the inner wall of the second compression ring is communicated with the outer wall of the second compression ring through a fourth oil inlet channel.
Further, in one embodiment, the display assembly includes:
The high-frequency transformer is sleeved on a connecting loop between the simulation device and the second high-voltage output end to obtain a partial discharge signal generated by the composite interface;
and the oscilloscope is used for displaying the acquired partial discharge signal.
Further, in one embodiment, the power supply further includes a low voltage output terminal, and the oscilloscope includes a first receiving channel and a second receiving channel; the first receiving channel is connected to the low-voltage output end; the second receiving channel is connected to the output end of the high-frequency transformer.
The simulation method of the composite interface partial discharge simulation system based on any one of the above, comprises the following steps:
installing and adjusting the first sample and the second sample in the simulation device;
the power input end is connected into a low voltage power supply;
and starting and debugging the display assembly, and collecting and displaying partial discharge signals at a composite interface formed by the first sample and the second sample through the display assembly.
Further, in one embodiment, the installing and adjusting the first sample and the second sample in the simulation device includes:
Installing the sample set in the sample cavity of a simulation assembly in the simulation device;
adjusting the relative positions of a first electrode assembly and a second electrode assembly in the simulation device so as to prop against two sides of the sample set;
placing the analog assembly, the first electrode assembly, and the second electrode assembly in an insulating environment;
the first electrode assembly is connected to a high voltage terminal of the power supply, and the second electrode assembly is connected to a ground terminal.
In the above-mentioned compound interface partial discharge simulation system, the simulation device is abutted the first sample with the second sample and is formed the sample group to pass through first sample and the compound interface of second sample simulation department, then set up insulating environment with compound interface and the surrounding of connecting the return circuit, and the partial discharge of sample group in the simulation device is triggered through the voltage that the power is applyed at simulation device both ends, finally gathers and shows the partial discharge signal of compound interface department through the display module. The composite interface can be simulated by utilizing the sample group consisting of the first sample and the second sample, so that the simulation cost is reduced, and meanwhile, the trigger voltage when the partial discharge phenomenon occurs is reduced due to the thinner size of the sample group, so that the trigger voltage required by the simulation can be completed by the conversion of the voltage transformation equipment, the simulation cost is further reduced, and the safety in the simulation process is improved.
According to the composite interface partial discharge simulation method, the voltage value of the trigger voltage for triggering the interface partial discharge is low, the requirement can be met only by converting the low voltage by using the voltage transformation equipment, the cost of the map sample is reduced, and the safety in the simulation process is improved. Meanwhile, the waveform of the electric signal generated by partial discharge of the composite interface is collected, filtered and displayed through the display component, so that the detection sensitivity and the accuracy of the map sample are improved when the partial discharge of the composite interface is simulated.
The various specific structures of the present application, as well as the actions and effects thereof, will be described in further detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram illustrating the operation of a composite interface partial discharge simulation system in one embodiment of the present application;
FIG. 2 is a schematic diagram of a power supply in a composite interface partial discharge simulation system according to one embodiment of the present application;
FIG. 3 is a schematic diagram of a display assembly of a composite interface partial discharge simulation system according to one embodiment of the present application;
FIG. 4 is a schematic diagram illustrating operation of a composite interface partial discharge simulation system according to another embodiment of the present application;
FIG. 5 is a perspective view of an analog device according to another embodiment of the present application;
FIG. 6 is an exploded view of an analog device in one embodiment of the present application;
FIG. 7 is an enlarged view of a simulation assembly in one embodiment of the present application;
FIG. 8 is an exploded view of a simulation assembly in one embodiment of the present application, with a sample set illustrated;
FIG. 9 is a perspective view in semi-section of a first simulated structure in one embodiment of the present application;
FIG. 10 is a perspective view in semi-section of a second simulated structure in one embodiment of the present application;
FIG. 11 is a perspective view of a first simulated structure and a first electrode assembly in a semi-section according to one embodiment of the present application;
FIG. 12 is a perspective view of a second simulated structure and a second electrode assembly in a semi-section according to one embodiment of the present application;
FIG. 13 is a cross-sectional view of a first simulated structure and a first electrode assembly in one embodiment of the present application;
FIG. 14 is a cross-sectional view of a second simulated structure and a second electrode assembly in one embodiment of the present application;
FIG. 15 is a cross-sectional view of a first dummy structure and a first dummy structure according to one embodiment of the present application;
FIG. 16 is a cross-sectional view of an analog device in one embodiment of the present application;
FIG. 17 is a cross-sectional view of a simulation device in which a sample set is illustrated in one embodiment of the present application.
Wherein, in the reference numerals, 1000-power supply; 1100-a power input; 1200-a first high voltage output; 1300-a second high voltage output; 1400-low voltage output; 2000-simulation device; 2100-oil groove; 2200-a simulation component; 2210—a first analog structure; 2211-a first end; 2212—a first test cavity; 2213—a first oil feed passage; 2214-a first clamp ring; 2215-a third oil feed passage; 2220-second analog structure; 2221-second end; 2222-second test chamber; 2223-second oil feed passage; 2224-second clamp ring; 2225-fourth oil feed passage; 2300-a first electrode assembly; 2310-a first screw rod; 2320—a first electrode plate; 2400-second electrode assembly; 2410-a second screw; 2420-a second electrode plate; 2500-support assembly; 2510—support pillow; 2511—a support surface; 2600-handle; 2700—a fastening component; 2800-sample cavity; 3000-display assembly; 3100-high frequency transformer; 3200—an oscilloscope; 3210-a first receive path; 3220-a second receiving channel; 3300-wireless oscilloscope; 4000-test sample set; 4100—a first sample; 4200-second sample.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are 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 the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
The composite interface partial discharge simulation system is used for simulating the partial discharge phenomenon caused by defects at the interface. As shown in fig. 8, the first sample 4100 and the second sample 4200 are insulating samples, and since the sample set 4000 is composed of the first sample 4100 and the second sample 4200, that is, the sample set 4000 is an insulating sample set, the composite interface in the present application is also an insulating composite interface. Specifically, the composite interface is an abutment surface between the first sample 4100 and the second sample 4200. When a plane defect, such as a scratch, or a surface damage such as an impurity, is provided on a plane where the first sample 4100 and the second sample 4200 are abutted against each other in the sample set 4000, a composite interface formed by the first sample 4100 and the second sample 4200 abutted against each other is also defective. It can be appreciated that one side of the first sample 4100 near the second sample 4200 is the inner side of the first sample 4100, the other side is the outer side of the first sample 4100, one side of the second sample 4200 near the first sample 4100 is the inner side of the second sample 4200, the other side is the outer side of the second sample 4200, and the outer side of the first sample 4100 and the outer side of the second sample 4200 constitute both sides of the sample set 4000. In the present invention, the outside of first sample 4100 and the outside of second sample 4200 are insulated with the exception of the position where they are connected to the power source.
In one embodiment, the first specimen 4100 may be an insulation of a high voltage cable, such as silicone rubber or ethylene propylene rubber, and the second specimen 4200 may be an insulation of a high voltage cable accessory, such as cross-linked polyethylene.
Preferably, in one embodiment, the first and second samples 4100, 4200 are circular lamellar structures, and the first and second samples 4100, 4200 have a diameter size of about 10mm to 50mm and a cost of about 1 to 20 yuan. The sample set 4000 has a circular sheet structure.
In another embodiment, the first sample 4100 and the second sample 4200 may also be in the form of powder, needle, or block.
In one embodiment, as shown in fig. 1 and 4, the above-mentioned composite interface partial discharge simulation system includes a power source 1000, a simulation device 2000, a display assembly 3000 and a sample set 4000. Wherein, the power supply 1000, the simulation device 2000 and the display assembly 3000 are communicated through lines.
Specifically, as shown in fig. 2, the power supply 1000 is a voltage-adjustable power supply, and the power supply 1000 includes a power supply input end 1100, a first high voltage output end 1200 and a second high voltage output end 1300, where the power supply input end 1100 is connected to a low voltage. The simulation apparatus 2000 is used for placing a sample set 4000, wherein the sample set 4000 includes a first sample 4100 and a second sample 4200 that abut against each other to form a composite interface. In the simulation state, the first sample 4100 is connected to the first high voltage output terminal 1200 through the simulation device 2000, and the second sample 4200 is connected to the second high voltage output terminal 1300 through the simulation device 2000 and is grounded. The sample set 4000 and the connection circuit are all in an insulating environment, i.e., the first sample 4100, the second sample 4200, and the connection circuit are all in an insulating environment. The display assembly 3000 is in signal connection with the connection loop, and is used for collecting and displaying partial discharge signals at the composite interface. The low voltage power may be in the range of 0V to 380V, for example, the low voltage power may be commercial power. The pressure difference between the first high-voltage output end and the second high-voltage output end ranges from 1KV to 30KV.
In one embodiment, as can be seen in fig. 1-6, a first sample 4100 is connected to a first high voltage output 1200 through a simulation device 2000, and a second sample 4200 is connected to a second high voltage output 1300 through the simulation device 2000.
In one preferred embodiment, the simulation device 2000 includes a pass-through member, to which the first sample 4100 is connected, and further via which the first high voltage output 1200 is connected; second sample 4200 is connected to a pass-through member, and is further connected to second high voltage output 1300 via a pass-through member.
In one particular embodiment, the ends of the conductive members abut the outside of the first sample 4100 and the outside of the second sample 4200.
In the above-mentioned compound interface partial discharge simulation system, the simulation device is abutted the first sample with the second sample and is formed the sample group to pass through first sample and the compound interface of second sample simulation department, then set up insulating environment with compound interface and the surrounding of connecting the return circuit, and the partial discharge of sample group in the simulation device is triggered through the voltage that the power is applyed at simulation device both ends, finally gathers and shows the partial discharge signal of compound interface department through the display module. The composite interface can be simulated by utilizing the sample group consisting of the first sample and the second sample, so that the cost is reduced, and meanwhile, the voltage when the partial discharge phenomenon occurs is reduced due to the fact that the sample group is thinner in size, so that the voltage required by simulation can be completed by the low voltage under the conversion of the voltage transformation equipment, the simulation cost is further reduced, and the safety in the simulation process is improved.
In one embodiment, as can be seen from fig. 5 and 6, the simulation apparatus 2000 in the above-mentioned composite interface partial discharge simulation system includes a simulation assembly 2200, a first electrode assembly 2300 and a second electrode assembly 2400. Wherein the analog component 2200 is an insulating material, and the first electrode component 2300 and the second electrode component 2400 are conductive materials.
As can be seen from fig. 5 to 8, one end of the first electrode assembly 2300 is abutted to the outside of the first sample 4100 through the analog assembly 2200, the other end is connected to the first high voltage output terminal 1200, one end of the second electrode assembly 2400 is abutted to the outside of the second sample 4200 through the analog assembly 2200, and the other end is connected to the second high voltage output terminal 1300 and grounded. The analog assembly 2200, the first electrode assembly 2300, and the second electrode assembly 2400 together with the sample set 4000 form a sample cavity 2800 in which the sample set 4000 is placed, and the sample set 4000 is placed in the sample cavity 2800. The sample cavity 2800, the first electrode assembly 2300 and the second electrode assembly 2400 are in an insulating environment, i.e., the sample set 4000, the first electrode assembly 2300 and the second electrode assembly 2400 are in an insulating environment. The sample cavity 2800, the first electrode assembly 2300 and the second electrode assembly 2400 are in an insulating environment, and may be a sample cavity 2800, the first electrode assembly 2300 and the second electrode assembly 2400 are filled with an insulating material, and in particular, the insulating material may be a simulation device made of an insulating material and an insulating material located between the simulation device and the sample cavity 2800, the first electrode assembly 2300 and the second electrode assembly 2400.
In one preferred embodiment, the insulating material is an insulating oil.
According to the simulation device for the partial discharge simulation system of the composite interface, the composite interface is simulated through the simulation assembly and the sample group consisting of the first sample and the second sample, and meanwhile, the insulation space outside the composite interface connection loop is simulated through the simulation assembly, the first electrode assembly and the second electrode assembly matching die, so that the simulation environment that high voltage is arranged on two sides of the composite interface and insulation is realized around the composite interface is realized. The simulation device can simulate the partial discharge of the composite interface by adopting the sample group, reduces the simulation cost, promotes the subsequent partial study of the composite interface, improves the accuracy of the partial discharge simulation of the composite interface by adopting the insulation environment around the connecting loop, and ensures the feasibility of the simulation test.
In one embodiment, the above-mentioned composite interface partial discharge simulation system, as can be seen from fig. 8, the simulation assembly 2200 includes a first simulation structure 2210 and a second simulation structure 2220. Wherein the first analog structure 2210 includes a first end 2211 and the second analog structure 2220 includes a second end 2221. The second end 2221 of the second analog structure 2220 is clamped to the first end 2211 of the first analog structure 2210. The first electrode assembly 2300 passes through the first analog structure 2210, abuts the outside of the first sample 4100, and the second electrode assembly 2400 passes through the second analog structure 2220, abuts the outside of the second sample 4200. The first electrode assembly 2300, the second electrode assembly 2400, the first simulation structure 2210, and the second simulation structure 2220 together form a sample cavity 2800, i.e., the first electrode assembly 2300, the second electrode assembly 2400, the first simulation structure 2210, and the second simulation structure 2220 together define the position of the sample set 4000 to simulate a composite interface formed by the first sample 4100 and the second sample 4200, thereby enabling simulation of partial discharge at the composite interface.
According to the simulation device in the composite interface partial discharge simulation system, the simulation assembly is set to be a detachable first simulation structure and a detachable second simulation structure, so that the sample group can be conveniently installed, the installation difficulty is reduced, and the operability is improved.
In one embodiment, as can be seen from fig. 9 to 17, in the above-mentioned composite interface partial discharge simulation system, a first test cavity 2212 is disposed on an end surface of a first end portion 2211 of a first simulation structure 2210, and an inner surface of the first test cavity 2212 is communicated with an outer surface of the first simulation structure 2210 through a first oil inlet channel 2213. The end face of the second end portion 2221 of the second simulation structure 2220 is provided with a second test cavity 2222, the second end portion 2221 is sleeved in the first test cavity 2212 of the first end portion 2211, and the inner surfaces of the second test cavities 2222 are communicated through a second oil inlet channel 2223 between the outer surfaces of the second simulation structure 2220.
The first electrode assembly 2300 passes through the first analog structure 2210 and extends forward along the first test cavity 2212, and the second electrode assembly 2400 passes through the second analog structure 2220 and extends forward along the second test cavity 2222. After the first simulation structure 2210 and the second simulation structure 2220 are assembled, the first oil inlet channel 2213 and the second oil inlet channel 2223 communicate the first test cavity 2212 and the second test cavity 2222 on two sides of the sample set 4000 with the outside, so that insulating substances can enter conveniently. The first oil inlet passage 2213 and the second oil inlet passage are filled with insulating oil, and the simulation assembly 2200 and the insulating oil together form an insulating environment.
In one preferred embodiment, the first analog structure 2210 is integrally formed with the second analog structure 2220, and a placement port (not shown) is formed at a position where the sample group 4000 is placed, and the analog assembly 2200 further includes a blocking member (not shown) for blocking the placement port, wherein the sample group 4000 is placed to block the placement port by the blocking member.
In order to shorten the lengths of the first and second oil feed passages 2213 and 2223 as much as possible for convenience of processing, in one preferred embodiment, the first oil feed passage 2213 extends perpendicularly to the extending direction of the first analog structure 2210, and the second oil feed passage 2223 extends perpendicularly to the extending direction of the second analog structure 2220.
In one preferred embodiment, the first simulation structure 2210 is a cylindrical structure, and the number of the first oil inlet passages 2213 is four, and the first oil inlet passages 2213 are uniformly distributed on the circumferential surface of the first simulation structure 2210.
In one preferred embodiment, the first oil inlet passages 2213 are two groups, and are respectively distributed at two ends of the second end portion 2211 along the extending direction of the first simulation structure 2210.
In one preferred embodiment, the second analog structure 2220 is a cylindrical structure, and the number of the second oil inlet passages 2223 is four, and the second oil inlet passages are uniformly distributed on the circumferential surface of the second analog structure 2220.
In one preferred embodiment, the second oil inlet passages 2223 are two groups, and are respectively distributed at two ends of the second end portion 2221 along the extending direction of the second analog structure 2220.
In one preferred embodiment, the first test cavity 2212 corresponds to the size and location of the second test cavity 2222 such that the second end 2221 fits within the first test cavity 2212 of the first end 2211.
According to the simulation device in the composite interface partial discharge simulation system, the first test cavity is arranged on the first simulation structure, the second test cavity is arranged on the second simulation structure, insulating oil is convenient to infiltrate into and fill the insulating cavity between the simulation assembly and the first electrode assembly, between the simulation assembly and the second electrode assembly, and between the simulation assembly and the sample set, the influence of ambient air and the like on partial discharge is reduced, and the accuracy of partial discharge at the simulation composite interface is improved. The first test cavity is communicated with the external environment through the first oil inlet channel, the second test cavity is communicated with the external environment through the second oil inlet channel, insulating substances are convenient to enter, the filling of the insulating substances around the first electrode assembly, the second insulating assembly and the sample group is further guaranteed, the partial discharge external environment in an ideal state is fully simulated, and the reality of simulating partial discharge is further improved.
In one embodiment, as can be seen from fig. 9 to 17, the first test cavity 2212 inner surface extends toward the second simulation structure 2220 to form a first compression ring 2214, and the second test cavity 2222 inner surface extends toward the first simulation structure 2210 to form a second compression ring 2224 axially matched with the first compression ring 2214. The first clamp ring 2214 and the second clamp ring 2224 are respectively abutted to two sides of the sample set 4000.
To further ensure the compound effect at the compound interface location to increase the accuracy of the simulation device, in one particular embodiment, the first clamp ring 2214 abuts the outside of the first specimen 4100 and the second clamp ring 2224 abuts the outside of the second specimen 4200.
In one preferred embodiment, the abutment surfaces of the first clamp ring 2214 and the sample set 4000 and the abutment surfaces of the second clamp ring 2224 and the sample set 4000 are juxtaposed in a direction perpendicular to the interface.
Preferably, in one embodiment, the area of the abutting region of the first clamp ring 2214 and the sample set 4000 and the area of the abutting region of the second clamp ring 2224 and the sample set 4000 are the same.
According to the simulation device in the composite interface partial discharge simulation system, the first compression ring and the second compression ring compress the sample group, and the insulating substances are placed to enter the composite interface of the sample group along the abutting surface of the first sample and the second sample, so that the simulation accuracy of the composite interface is improved.
In order to facilitate forming the first clamp ring and the second clamp ring and reduce the forming difficulty, in one embodiment, the first test cavity 2212 is a first step hole, and a shoulder of the first step hole extends toward the second simulation structure to form a first clamp ring 2214. The second test cavity 2222 is a second stepped bore with a shoulder extending toward the first analog structure to form a second clamp ring 2224.
Preferably, in one embodiment, the shoulder of the first stepped bore extends in a direction in which the first stepped bore extends, forming a first clamp ring 2214. The shoulder of the second stepped bore extends in a direction in which the second stepped bore extends, forming a second clamp ring 2224.
In one embodiment, the entire area of the shoulder of the first stepped bore extends in the direction in which the first stepped bore extends, forming a first clamp ring 2214.
In one embodiment, the entire area of the shoulder of the second stepped bore extends in the direction in which the second stepped bore extends, forming a second clamp ring 2224.
In another embodiment, a localized area of the first stepped bore shoulder extends along the direction in which the first stepped bore extends, forming a first clamp ring 2214. Annular insulating cavities are arranged between the inner walls of the first step holes, the shoulders and the first compression ring 2214. A partial region of the second stepped bore shoulder extends along a direction in which the second stepped bore extends, forming a second clamp ring 2224. An annular insulating cavity is provided between the inner wall of the second stepped bore, the shoulder and the second clamp ring 2224.
In one embodiment, the first oil inlet passages 2213 are provided in two groups and are respectively disposed on two sides of the shoulder of the first stepped hole 2121. The second oil inlet passages 2223 are two groups, and are respectively arranged at two sides of the shoulder of the second stepped hole.
In another embodiment, the first test cavity 2212 is a common hole structure.
In order to further ensure that the insulating oil fully fills the first test cavity 2212 and the second test cavity 2222 and improve the insulating environment around the sample set 4000, in one embodiment, as can be seen from fig. 9 to 17, in the above-mentioned composite interface partial discharge simulation system, the inner wall of the first compression ring 2214 is communicated with the outer wall of the first compression ring 2214 through the third oil inlet channel 2215, and the inner wall of the second compression ring 2224 is communicated with the outer wall of the second compression ring 2224 through the fourth oil inlet channel 2225.
In one preferred embodiment, the third oil feed passage 2215 corresponds to the first oil feed passage 2213 in a direction perpendicular to the axial direction of the sample group 4000, and the fourth oil feed passage 2225 corresponds to the second oil feed passage 2223 in a direction perpendicular to the axial direction of the sample group 4000.
According to the simulation device in the composite interface partial discharge simulation system, the first test cavity is communicated with the external environment through the third oil inlet channel, the second test cavity is communicated with the external environment through the fourth oil inlet channel, insulating substances conveniently penetrate through the compression ring and enter the simulation assembly, the first electrode assembly, the second insulating assembly and the insulating substances around the sample group are further guaranteed to be filled, the partial discharge external environment in an ideal state is fully simulated, and the reality of simulating partial discharge is further improved.
In one embodiment, as can be seen from fig. 5 and 6, the above-mentioned composite interface partial discharge simulation device further includes an oil tank 2100, and the oil tank 2100 is filled with an insulating material. The analog assembly 2200, the first electrode assembly 2300, and the second electrode assembly 2400 are suspended within the oil bath 2100, and the first electrode assembly 2300 and the second electrode assembly 2400 are completely immersed in an insulating substance.
In one preferred embodiment, the analog assembly 2200, the first electrode assembly 2300, and the second electrode assembly 2400 are completely submerged in an insulating substance.
In one specific embodiment, the composite interface partial discharge simulation device further includes a support assembly 2500. Wherein the support assembly 2500 is disposed in the oil sump 2100, the analog assembly 2200 is disposed on a support surface of the support assembly 2500, the analog assembly 2200 is suspended within the sump 2100 by the support assembly 2500.
To ensure insulation around the sample set, preventing the sample set from contacting the outside through air, in one preferred embodiment, the support assembly 2500 is a support pillow 2510 disposed at the bottom of the oil sump 2100, wherein the upper surface of the support pillow 2510 is provided with a support surface 2511 that mates with the lower surface of the analog assembly 2200.
In another preferred embodiment, the support assembly 2500 is a support rod (not shown) disposed above the oil bath 2100 and a connection rod (not shown) extending from both ends of the support rod toward the insulating material, and the simulation assembly 2200 is suspended in the oil bath through the support rod and the connection rod.
In one embodiment, as shown in fig. 8, the first electrode assembly 2300 includes a first lead screw 2310 and a first electrode plate 2320, and the second electrode assembly 2400 includes a second lead screw 2410 and a second electrode plate 2420. Wherein a first screw 2310 passes through the simulation assembly 2200 and extends into the sample cavity 2800. A second lead screw 2410 passes through the simulation assembly 2200 and extends into the sample cavity 2800. The first lead screw 2310 is in threaded connection with the simulation assembly 2200, the first electrode plate 2320 is arranged at one end of the first lead screw 2310 and is abutted to one side of the sample group 4000, the second lead screw 2410 is in threaded connection with the simulation assembly 2200, and the second electrode plate 2420 is arranged at one end of the second lead screw 2410 and is abutted to the other side of the sample group 4000.
In one preferred embodiment, first screw 2310 passes through first analog structure 2210 and extends into sample cavity 2800. The second lead screw 2410 passes through the second analog structure 2220 and extends into the sample cavity 2800. The first lead screw 2310 is in threaded connection with the first simulation structure 2210, the first electrode plate 2320 is arranged at one end of the first lead screw 2310 and is abutted to the outer side of the first sample 4100, the second lead screw 2410 is in threaded connection with the second simulation structure 2220, and the second electrode plate 2420 is arranged at one end of the second lead screw 2410 and is abutted to the outer side of the second sample 4200.
In one preferred embodiment, the edge of the first electrode plate 2320 abuts the inner surface of the first test cavity 2212. The edge of the second electrode plate 2420 abuts the inner surface of the second test cavity 2222.
In one preferred embodiment, the radial dimension of the first electrode plate 2320 is greater than the radial dimension of the first lead screw 2310, and a first limiting surface (not labeled) is provided on the first simulation structure 2210, and a threaded hole for passing the first lead screw 2310 extends on the first limiting surface. The first limiting surface is used for limiting the movement limit position of the first electrode plate 2320.
The radial dimension of the second electrode plate 2420 is greater than the radial dimension of the second screw rod 2410, and a second limiting surface (not labeled) is disposed on the second analog structure 2220, and a threaded hole for passing through the second screw rod 2410 extends on the second limiting surface. The first limiting surface is used for limiting the movement limit position of the second electrode plate 2420.
In order to improve the accuracy of the simulation device in simulating the partial discharge phenomenon, in one preferred embodiment, the composite interface partial discharge simulation device further includes a torque detecting component (not shown). The torque detection part monitors and adjusts the torque of the first screw rod 2310 and the second screw rod 2410, so that excessive extrusion or insufficient extrusion of the first electrode plate 2320 and the second electrode plate 2420 on the sample set 4000 is prevented, and the accuracy of subsequent tests is affected.
According to the simulation device in the composite interface partial discharge simulation system, the length connected with the simulation assembly is adjusted through the first lead screw and the second lead screw, the distance between the first electrode plate and the second electrode plate is adjusted, so that the first electrode plate and the second electrode plate are respectively abutted against the outer side of the first sample and the outer side of the second sample, the communication between a loop and the sample group is realized, meanwhile, insulating substances are prevented from entering the space between the first electrode group and the second electrode group, and the simulation authenticity of the simulation device is ensured.
For ease of operation, in one embodiment, the composite interface partial discharge simulation device further includes two handles 2600, which are respectively disposed at ends of the first electrode assembly 2300 and the second electrode assembly 2400 remote from the simulation assembly. In the above-mentioned composite interface partial discharge simulation device, by adding the handle 2600 to the first electrode assembly 2300 and the second electrode assembly 2400, the distance between the ends of the first electrode assembly 2300 and the second electrode assembly 2400 can be conveniently adjusted, and the distance between the first sample 4100 and the second sample 4200 can be further adjusted, so that the defect in the sample set 4000 can be further adjusted.
In one preferred embodiment, the handle 2600 is secured to the ends of the first electrode assembly 2300 and the second electrode assembly 2400 remote from the analog assembly by a fastening member 2700.
In order to improve the acquisition accuracy and display accuracy of the display assembly, in one embodiment, in the above-mentioned composite interface partial discharge simulation system, the display assembly 3000 includes a high-frequency transformer 3100 and an oscilloscope 3200. The high-frequency transformer 3100 is sleeved on a connection loop of the analog device 2000 and the second high-voltage output end 1300, so as to obtain a partial discharge signal generated by the composite interface. The oscilloscope 3200 is used to display the acquired partial discharge signal.
In another preferred embodiment, the display assembly 3000 includes a wireless oscilloscope 3300, and the display assembly 3000 receives electrical signals via wireless transmission, thereby displaying the received electrical signals.
In one embodiment, the above-described composite interface partial discharge simulation system, the power supply 1000 further includes a low voltage output 1400. The oscilloscope 3200 includes a first receiving channel 3210 and a second receiving channel 3220. The first receiving channel 3210 is connected to the low-voltage output 1400, and the second receiving channel 3220 is connected to the output of the high-frequency transformer 3100. The oscilloscope 3200 receives the low-voltage power output by the low-voltage output end 1400 through the first receiving channel 3210, and then determines the amplitude and the period of the waveform of the local electric signal generated by partial discharge at the composite interface according to the amplitude and the period of the received low-voltage power waveform. The low voltage output by the power supply is used as a test voltage to determine the amplitude and the period of the waveform, so that the capture and the display of partial discharge signals are facilitated, and the sensitivity and the accuracy of the display component are improved.
The compound interface partial discharge simulation method specifically comprises the following steps:
step 1: first sample 4100 and second sample 4200 are mounted and adjusted in simulation apparatus 2000.
Step 2: the power supply 1000 is connected to the power input 1100 at a low voltage.
Step 3: the display assembly 3000 is activated and commissioned, and partial discharge signals at the composite interface formed by the first specimen 4100 and the second specimen 4200 are collected and displayed by the display assembly 3000.
In a specific embodiment, in the above method for simulating partial discharge of a composite interface, step 3 includes:
Step 31: after the operation of the oscilloscope 3200 is stable, the first receiving channel 3210 and the second receiving channel 3220 are started, signals of the two channels are displayed, the full screen time width of the first receiving channel 3210 is adjusted to be a power frequency period, for example, 20ms, and the amplitude is adjusted to be in a proper range.
Step 32: the second receiving channel 3220 is adjusted to have the same power frequency period and amplitude as the first receiving channel 3210.
Step 33: the power supply 1000 is adjusted to gradually increase the voltage at two ends of the analog device 2000, and observe the amplitude and the power frequency period of the partial discharge signal of the first receiving channel 3210 of the oscilloscope 3200.
Step 34: the amplitude of the partial discharge signal detected by the high frequency transformer 3100 in the second receiving channel 3220 of the oscilloscope 3200 is observed and adjusted to a proper display level.
Step 35: and repeating the operations from the step 33 to the step 34 until the partial discharge signal with three-phase limit characteristic is displayed in the second receiving channel 3220 of the oscilloscope 3200, and thus, the high-frequency partial discharge simulation of the composite insulation interface is completed.
The composite interface partial discharge simulation method is used for triggering the voltage value of the interface partial discharge to be lower, the requirement can be met only by converting the voltage by using the voltage transformation equipment, the cost of the map sample is reduced, and the safety in the simulation process is improved. Meanwhile, the waveform of the electric signal generated by partial discharge of the composite interface is collected, filtered and displayed through the display component, so that the detection sensitivity and the accuracy of the map sample are improved when the partial discharge of the composite interface is simulated.
In one embodiment, in the above method for simulating partial discharge of a composite interface, step 1 includes the following steps:
step 11: sample set 4000 is mounted within sample cavity 2800 of simulation assembly 2200 in simulation device 2000.
Step 12: the relative positions of the first electrode assembly 2300 and the second electrode assembly 2400 in the simulation apparatus 2000 are adjusted to abut both sides of the sample set 4000.
Step 13: the analog assembly 2200, the first electrode assembly 2300, and the second electrode assembly 2400 are placed in an insulated environment.
Step 14: the first electrode assembly 2300 is connected to a high voltage terminal of a power source, and the second electrode assembly 2400 is connected to a ground terminal.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A composite interface partial discharge simulation system, comprising:
the sample group comprises a first sample and a second sample, and the first sample is abutted with the second sample to form a composite interface;
the power supply input end is connected with the piezoelectric power supply, and the output voltage of the power supply can be adjusted;
the simulation device is internally provided with the sample group; the simulation device comprises a simulation assembly, a first electrode assembly and a second electrode assembly, wherein the simulation assembly comprises a first simulation structure and a second simulation structure, and the second end part of the second simulation structure is clamped at the first end part of the first simulation structure; the first electrode assembly, the second electrode assembly, the first analog structure and the second analog structure together form a sample cavity;
a first test cavity is arranged on the end face of the first end part of the first simulation structure; the inner surface of the first test cavity is communicated with the outer surface of the first simulation structure through a first oil inlet channel;
a second test cavity is arranged on the end face of the second end part of the second simulation structure, and the second end part is sleeved in the first test cavity of the first end part; the inner surface of the second test cavity is communicated with the outer surface of the second simulation structure through a second oil inlet channel;
One end of the first electrode assembly penetrates through the first simulation structure, extends forwards along the first test cavity and is abutted to the outer side of the first sample, and the other end of the first electrode assembly is connected to a first high-voltage output end of the power supply; one end of the second electrode assembly passes through the second simulation structure, extends forwards along the second test cavity and is abutted to the outer side of the second sample, the other end of the second electrode assembly is connected to a second high-voltage output end of the power supply and is grounded, and the sample group and the connecting loop are both in an insulating environment; the first oil inlet channel and the second oil inlet channel are filled with insulating oil, and the simulation assembly and the insulating oil jointly form an insulating environment;
and the display component is in signal connection with the connecting loop and is used for acquiring and displaying the partial discharge signals at the composite interface.
2. The composite interface partial discharge simulation system of claim 1, wherein the first sample is an insulation of a high voltage cable and the second sample is an insulation of a high voltage cable accessory.
3. The composite interface partial discharge simulation system of claim 1 wherein the first sample and the second sample are circular lamellar structures.
4. The composite interface partial discharge simulation system of claim 1 wherein the first oil feed channel extends perpendicular to the direction of extension of the first simulation structure and the second oil feed channel extends perpendicular to the direction of extension of the second simulation structure.
5. The composite interface partial discharge simulation system of claim 1, wherein an inner surface of the first test cavity extends toward the second simulation structure to form a first clamp ring; the inner surface of the second test cavity extends towards the first simulation structure to form a second compression ring opposite to the axial position of the first compression ring; the first compression ring and the second compression ring are respectively abutted to two sides of the sample group.
6. The composite interface partial discharge simulation system of claim 5, wherein the first clamp ring inner wall and the first clamp ring outer wall are communicated through a third oil inlet channel; the inner wall of the second compression ring is communicated with the outer wall of the second compression ring through a fourth oil inlet channel.
7. The composite interface partial discharge simulation system of claim 1, wherein the display assembly comprises:
The high-frequency transformer is sleeved on a connecting loop between the simulation device and the second high-voltage output end to obtain a partial discharge signal generated by the composite interface;
and the oscilloscope is used for displaying the acquired partial discharge signal.
8. The composite interface partial discharge simulation system of claim 7, wherein the power supply further comprises a low voltage output, the oscilloscope comprises a first receiving channel and a second receiving channel; the first receiving channel is connected to the low-voltage output end; the second receiving channel is connected to the output end of the high-frequency transformer.
9. A method for simulating partial discharge of a composite interface based on the simulation system of partial discharge of a composite interface according to any one of claims 1 to 8, comprising:
installing and adjusting the first sample and the second sample in the simulation device;
the power input end is connected into a low voltage power supply;
and starting and debugging the display assembly, and collecting and displaying partial discharge signals at a composite interface formed by the first sample and the second sample through the display assembly.
10. The method of claim 9, wherein said installing and adjusting said first and second samples in said simulation device comprises:
installing the sample set in the sample cavity of a simulation assembly in the simulation device;
adjusting the relative positions of a first electrode assembly and a second electrode assembly in the simulation device so as to prop against two sides of the sample set;
placing the analog assembly, the first electrode assembly, and the second electrode assembly in an insulating environment;
the first electrode assembly is connected to a high voltage terminal of the power supply, and the second electrode assembly is connected to a ground terminal.
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| KR20140035122A (en) * | 2012-09-13 | 2014-03-21 | 한국전력공사 | Apparatus for generating simulated partial discharge signal |
| CN104569766A (en) * | 2015-01-21 | 2015-04-29 | 国家电网公司 | GIS equipment high frequency partial discharge testing system |
| CN105629139B (en) * | 2015-12-29 | 2018-04-20 | 武汉大学 | A kind of gas insulated electric apparatus shelf depreciation multi-source combined monitoring experimental provision |
| CN206331073U (en) * | 2016-10-12 | 2017-07-14 | 西安工程大学 | A kind of electric cable fitting interface flashover test device |
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| CN107505543A (en) * | 2017-08-11 | 2017-12-22 | 河南天通电力有限公司 | Based on mesolow cable local discharge on-line monitoring system |
| CN107688141B (en) * | 2017-10-20 | 2023-12-29 | 广东电网有限责任公司电力科学研究院 | Interface of composite insulator Performance test system and method |
| CN108957263B (en) * | 2018-08-24 | 2020-06-09 | 国网浙江省电力有限公司电力科学研究院 | XLPE cable accessory interface multi-stress coupling simulation test device and method |
| CN109188225A (en) * | 2018-10-10 | 2019-01-11 | 中国电力科学研究院有限公司 | A kind of cable connector compound interface breakdown voltage detection device |
| CN209417216U (en) * | 2018-12-30 | 2019-09-20 | 国网北京市电力公司 | Discharge Simulation device |
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