CN112595937A - Cable partial discharge measuring device based on balance method - Google Patents
Cable partial discharge measuring device based on balance method Download PDFInfo
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- CN112595937A CN112595937A CN202011311626.6A CN202011311626A CN112595937A CN 112595937 A CN112595937 A CN 112595937A CN 202011311626 A CN202011311626 A CN 202011311626A CN 112595937 A CN112595937 A CN 112595937A
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- partial discharge
- insulating
- block
- measuring device
- shell
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- 238000000034 method Methods 0.000 title claims abstract description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 52
- 229910052802 copper Inorganic materials 0.000 claims abstract description 52
- 239000010949 copper Substances 0.000 claims abstract description 52
- 238000005192 partition Methods 0.000 claims abstract description 8
- 238000012360 testing method Methods 0.000 claims description 18
- 238000009413 insulation Methods 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 8
- 238000007493 shaping process Methods 0.000 claims 1
- 125000006850 spacer group Chemical group 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0064—Earth or grounding circuit
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0067—Devices for protecting against damage from electrostatic discharge
Abstract
The invention relates to the technical field of cable partial discharge, and discloses a cable partial discharge measuring device based on a balance method, which comprises a shell, a cover cap and an insulating partition plate, wherein a grounding ring is integrally fixed on the right side of the outer wall of the shell, an insulating plate is integrally formed in the middle of the front end of the shell, a left copper block is mounted on the left side of the front end of the shell, a right copper block is mounted on the right side of the front end of the shell, the left copper block and the right copper block are respectively positioned on two sides of the insulating plate, convex clamping blocks are integrally formed at four corners of the front end of the shell, convex semicircular convex blocks are integrally formed on the outer wall of each clamping block, and an inner cavity is formed. According to the invention, the cover cap is clamped corresponding to the front end of the shell, so that the two groups of clamping rings in the cover cap are clamped corresponding to the clamping block at the front end of the shell, the convex blocks outside the clamping blocks are clamped in the two groups of clamping rings, the clamping grooves are clamped corresponding to the insulating plates, the left copper block and the right copper block made of copper are effectively protected, and the left copper block and the right copper block are prevented from being damaged.
Description
Technical Field
The invention relates to the technical field of cable partial discharge, in particular to a cable partial discharge measuring device based on a balance method.
Background
The traditional partial discharge balance measurement method takes a resistor capacitor as an input circuit, has a plurality of defects and is difficult to popularize and use in the high-voltage and ultrahigh-voltage fields, an inductance capacitor is taken as the input circuit, the test principle of partial discharge of a tuning balance method is comprehensively analyzed, and the results of simulation experiments show that under the selected measurement center frequency, countless groups of balance points exist in the adjustment range of a tuning capacitor, the capacitance difference between a sample and a reference capacitor can be 100 times, the interference rejection ratio can be up to 2000-4000, the measurement results in an actual high-voltage test loop show that the corresponding interference rejection ratio is 1950-600 within the range of 1-1000 of the sample ratio, and the corresponding minimum measurable discharge quantity is 0, 1-0 and 6 pC.
Partial discharge is a main cause of high-voltage insulation damage, measurement of the partial discharge is always an important index for quality control of high-voltage insulation products, and is an effective means for insulation online detection and accident prevention, but accurate measurement of the partial discharge is very difficult, and the main difficulty is an interference problem.
The prior patent (publication number: CN202502200U) is a cable partial discharge measuring device based on a balance method, which has the advantages of strong anti-interference capability, small error and high sensitivity, but the prior balance method measuring device has no protection structure, most of the measuring structures are made of copper in order to ensure the conductivity, the copper is soft and easy to damage, an auxiliary structure is needed when the partial discharge is approached, and meanwhile, the grounding protection is added.
Disclosure of Invention
The invention aims to provide a cable partial discharge measuring device based on a balance method, which solves the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a cable partial discharge measuring device based on equilibrium method, includes casing, block and insulating barrier, casing outer wall right side an organic whole is fixed with the ground ring, casing front end middle part integrated into one piece has the insulation board, left copper billet is installed in casing front end left side, right copper billet is installed on casing front end right side, left side copper billet and right copper billet are located the insulation board both sides respectively, casing front end four corners integrated into one piece has the block of protrusion form, block outer wall integrated into one piece has the lug of protrusion semicircle form, the inside excavation of block has the inner chamber, the inner chamber bottom of wall encircles the type and has the block ring of protrusion form, and the block ring is two sets of.
As a preferred embodiment of the present invention, a fixing block is integrally formed in the middle of the top of the inner cavity, a recessed slot is integrally formed at the bottom end of the fixing block, and the slot corresponds to the insulating plate.
As a preferred embodiment of the present invention, a power frequency test transformer without partial discharge is fixed on the left side inside the casing, an iron core is fixed inside the power frequency test transformer without partial discharge, and a high-voltage insulation winding is arranged on an outer wall winding of the iron core.
In a preferred embodiment of the present invention, the detector is fixed to the right side inside the casing, and the nixie tube is mounted on the top surface of the casing.
In a preferred embodiment of the present invention, a telescopic rod is integrally fixed to a rear end of the housing, an insulating baffle is integrally formed at a distal end of the telescopic rod, a handle is integrally formed at a right end of the insulating baffle, and an insulating sleeve is nested on an outer wall of the handle.
As a preferred embodiment of the present invention, the signal output terminals of the left copper block and the right copper block are connected to the signal input terminal of the partial discharge-free power frequency test transformer.
In a preferred embodiment of the present invention, an insulating pad layer is fixed to a top end of the insulating spacer, an upper electrode is fixed to a top portion of the insulating pad layer, and a lower electrode is integrally formed at a bottom end of the insulating spacer.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the grounding ring is arranged, and the external grounding wire is fixed corresponding to the grounding ring, so that the grounding wire is connected with the ground, the electrostatic current is conveniently led into the ground, the device is effectively protected, and the electric leakage caused by large current is avoided.
2, the nut cap is arranged, the nut cap is clamped corresponding to the front end of the shell, so that the two groups of clamping rings in the nut cap are clamped corresponding to the clamping blocks at the front end of the shell, the convex blocks outside the clamping blocks are clamped in the two groups of clamping rings, the clamping grooves are clamped corresponding to the insulating plates, the left copper block and the right copper block made of copper are effectively protected, and the left copper block and the right copper block are prevented from being damaged.
3, due to the arrangement of the telescopic rod, the insulating baffle plate, the handle and the insulating sleeve, the telescopic rod is extended and contracted, the insulating sleeve is nested corresponding to the handle and is insulated through the insulating baffle plate, and the monitoring distance is favorably kept.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic diagram of the overall structure of a cable partial discharge measuring device based on a balance method;
fig. 2 is a schematic structural view of a transverse pull rod of the cable partial discharge measuring device based on a balancing method after being folded at the bottom of a second stretcher pipe;
FIG. 3 is a schematic diagram of a cap structure of a cable partial discharge measuring device based on a balancing method according to the present invention;
FIG. 4 is a schematic diagram of the internal structure of a housing of a cable partial discharge measuring device based on a balancing method according to the present invention;
fig. 5 is a schematic view of a partial structure of a shell of a cable partial discharge measuring device based on a balancing method.
In the figure: 1. an insulating plate; 2. a left copper block; 3. a clamping block; 4. a bump; 5. a nixie tube; 6. a housing; 7. a right copper block; 8. clamping a ring; 9. an inner cavity; 10. a card slot; 11. a fixed block; 12. a cap; 13. no partial discharge power frequency test transformer; 14. a high voltage insulated winding; 15. an iron core; 16. a detector; 17. a telescopic rod; 18. an insulating baffle; 19. an insulating sleeve; 20. a handle; 21. an upper electrode; 22. an insulating pad layer; 23. an insulating spacer; 24. a lower electrode; 25. and a ground ring.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easily understood, the invention is further explained by combining the specific embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; in the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can be, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-5, the present invention provides a technical solution: a cable partial discharge measuring device based on a balance method comprises a shell 6, a cap 12 and an insulating partition plate 23, wherein a grounding ring 25 is integrally fixed on the right side of the outer wall of the shell 6, an insulating plate 1 is integrally formed in the middle of the front end of the shell 6, a left copper block 2 is installed on the left side of the front end of the shell 6, a right copper block 7 is installed on the right side of the front end of the shell 6, the left copper block 2 and the right copper block 7 are respectively positioned on two sides of the insulating plate 1, protruding clamping blocks 3 are integrally formed at four corners of the front end of the shell 6, protruding semicircular protruding blocks 4 are integrally formed on the outer wall of the clamping blocks 3, an inner cavity 9 is chiseled in the cap 12, protruding clamping rings 8 are formed at the bottom of the inner wall of the inner cavity 9 in a surrounding manner, and; wherein, it is fixed to correspond ground ring 25 with outside earth connection, make the ground connection ground, be convenient for introduce electrostatic current ground, protection device effectively, avoid the great electric leakage that leads to of electric current, through corresponding the casing 6 front end block with block 12, make the inside two sets of block rings 8 of block 12 correspond the 6 front end block of casing, make the outside lug 4 block of block 3 block in two sets of block rings 8, make draw-in groove 10 correspond insulation board 1 block, protect copper left copper billet 2 and right copper billet 7 effectively, avoid left copper billet 2 and right copper billet 7 to damage.
In the embodiment, referring to fig. 2, a fixed block 11 is integrally formed in the middle of the top of the inner cavity 9, a recessed slot 10 is integrally formed at the bottom end of the fixed block 11, and the position of the slot 10 corresponds to the position of the insulating plate 1; the clamping groove 10 in the cap 12 is clamped and fixed corresponding to the insulating plate 1, and the inner wall of the cap 12 is clamped corresponding to the outer wall of the clamping block 3 and corresponding to the projection 4.
Referring to fig. 3 in this embodiment, a power frequency test transformer 13 without partial discharge is fixed on the left side inside the casing 6, an iron core 15 is fixed inside the power frequency test transformer 13 without partial discharge, and a high-voltage insulation winding 14 is arranged on an outer wall winding of the iron core 15; the transformer 13 is mainly used for testing the insulation level of withstand working frequency voltage of various insulating materials, insulating structures, electrical products and the like, and is also used as a power supply for a partial discharge-free power frequency test of test articles such as transformers, mutual inductors, lightning arresters and the like.
Referring to fig. 1 in the present embodiment, a detector 16 is fixed at the right side inside the casing 6, and a nixie tube 5 is installed on the top surface of the casing 6; wherein, the signal output end of the detector 16 is connected with the signal input end of the nixie tube 5.
In the embodiment, referring to fig. 3, an expansion link 17 is integrally fixed at the rear end of the housing 6, an insulating baffle 18 is integrally formed at the tail end of the expansion link 17, a handle 20 is integrally formed at the right end of the insulating baffle 18, and an insulating sleeve 19 is nested on the outer wall of the handle 20; wherein, through carrying out extension and shrink telescopic link 17, nest insulating cover 19 corresponding handle 20 to through insulating baffle 18 insulating, be favorable to keeping monitoring distance.
In this embodiment, referring to fig. 1, the signal output ends of the left copper block 2 and the right copper block 7 are connected to the signal input end of the partial discharge-free power frequency test transformer 13, wherein an external current enters the partial discharge-free power frequency test transformer 13 through the left copper block 2 and the right copper block 7.
Referring to fig. 4 in this embodiment, an insulating pad 22 is fixed at the top end of the insulating spacer 23, an upper electrode 21 is fixed at the top of the insulating pad 22, and a lower electrode 24 is integrally formed at the bottom end of the insulating spacer 23; wherein, the upper and lower sides of the insulating partition 23 are provided with an upper electrode 21 and a lower electrode 24, which are used for detecting the partial discharge problem of the structure to be detected.
When the cable partial discharge measuring device based on the balance method is used, it should be noted that the invention is the cable partial discharge measuring device based on the balance method, which comprises an insulating plate 1, a left copper block 2, a clamping block 3, a convex block 4, a nixie tube 5, a shell 6, a right copper block 7, a clamping ring 8, an inner cavity 9, a clamping groove 10, a fixed block 11, a cap 12, a non-partial discharge power frequency test transformer 13, a high-voltage insulating winding 14, an iron core 15, a detector 16, a telescopic rod 17, an insulating baffle 18, an insulating sleeve 19, a handle 20, an upper electrode 21, an insulating cushion 22, an insulating partition 23, a lower electrode 24 and a grounding ring 25, which are all universal standard parts or parts known by technicians in the field, and the structure and principle of the device can be known by technical manuals or conventional experimental methods.
When in use, an external grounding wire is fixed corresponding to the grounding ring 25, so that the grounding wire is connected with the ground, static current is introduced into the ground, and the device is effectively protected, the cap 12 is clamped corresponding to the front end of the shell 6, two groups of clamping rings 8 in the cap 12 are clamped corresponding to the clamping blocks at the front end of the shell 6, the external convex blocks 4 of the clamping blocks 3 are clamped in the two groups of clamping rings 8, so that the clamping grooves 10 are clamped corresponding to the insulating plates 1, the copper left copper block 2 and the copper right copper block 7 are effectively protected, the left copper block 2 and the copper right copper block 7 are prevented from being damaged, the cap 12 is opened, the telescopic rod 17 is extended and contracted, the insulating sleeve 19 is nested corresponding to the handle 20 and is insulated through the insulating baffle 18, the monitoring distance is favorably kept, the telescopic rod 17 is extended, the upper electrode 21 and the lower electrode 24 are arranged on the upper side and the lower side of the insulating partition plate, partial discharge passes through the non-partial discharge power frequency test transformer 13 and is detected by the detector 16, and the detection result is displayed by the nixie tube 5.
While there have been shown and described what are at present considered the fundamental principles of the invention and its essential features and advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description of the embodiments is for clarity only, and those skilled in the art should make the description as a whole, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A cable partial discharge measuring device based on a balance method comprises a shell (6), a cover cap (12) and an insulating partition plate (23), and is characterized in that: casing (6) outer wall right side an organic whole is fixed with ground ring (25), casing (6) front end middle part integrated into one piece has insulation board (1), left copper billet (2) are installed in casing (6) front end left side, right copper billet (7) are installed on casing (6) front end right side, left side copper billet (2) and right copper billet (7) are located insulation board (1) both sides respectively, casing (6) front end four corners integrated into one piece has convex block (3), block (3) outer wall integrated into one piece has lug (4) of convex semicircle form, cap (12) inside is dug and is had inner chamber (9), inner chamber (9) inner wall bottom encircles the shaping and has convex block ring (8), and block ring (8) are two sets of.
2. The cable partial discharge measuring device based on the balanced method according to claim 1, characterized in that: a fixing block (11) is integrally formed in the middle of the top of the inner cavity (9), a concave clamping groove (10) is integrally formed at the bottom end of the fixing block (11), and the position of the clamping groove (10) corresponds to the position of the insulating plate (1).
3. The cable partial discharge measuring device based on the balanced method according to claim 1, characterized in that: the power frequency test transformer (13) whether have partial discharge is fixed with on the inside left side of casing (6), no partial discharge power frequency test transformer (13) inside is fixed with iron core (15), iron core (15) outer wall winding has high-voltage insulation winding (14).
4. The cable partial discharge measuring device based on the balanced method according to claim 1, characterized in that: the detector (16) is fixed on the right side inside the shell (6), and the nixie tube (5) is installed on the top surface of the shell (6).
5. The cable partial discharge measuring device based on the balanced method according to claim 1, characterized in that: casing (6) rear end an organic whole is fixed with telescopic link (17), telescopic link (17) end integrated into one piece has insulating baffle (18), insulating baffle (18) right-hand member integrated into one piece has handle (20), handle (20) outer wall nestification has insulating cover (19).
6. The cable partial discharge measuring device based on the balanced method according to claim 3, characterized in that: and the signal output ends of the left copper block (2) and the right copper block (7) are connected with the signal input end of the non-partial-discharge power frequency test transformer (13).
7. The cable partial discharge measuring device based on the balanced method according to claim 3, characterized in that: an insulating cushion layer (22) is fixed at the top end of the insulating partition plate (23), an upper electrode (21) is fixed at the top of the insulating cushion layer (22), and a lower electrode (24) is integrally formed at the bottom end of the insulating partition plate (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011311626.6A CN112595937A (en) | 2020-11-20 | 2020-11-20 | Cable partial discharge measuring device based on balance method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011311626.6A CN112595937A (en) | 2020-11-20 | 2020-11-20 | Cable partial discharge measuring device based on balance method |
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| CN112595937A true CN112595937A (en) | 2021-04-02 |
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| CN202011311626.6A Pending CN112595937A (en) | 2020-11-20 | 2020-11-20 | Cable partial discharge measuring device based on balance method |
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