CN103605057B - A kind of paper oil insulation disruptive strength experimental provision and method - Google Patents
A kind of paper oil insulation disruptive strength experimental provision and method Download PDFInfo
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- CN103605057B CN103605057B CN201310594376.5A CN201310594376A CN103605057B CN 103605057 B CN103605057 B CN 103605057B CN 201310594376 A CN201310594376 A CN 201310594376A CN 103605057 B CN103605057 B CN 103605057B
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Abstract
The present invention devises a kind of paper oil insulation disruptive strength experimental provision, electrode assembly in use oil clearance width and oilpaper ratio adjustable, and provide corresponding test method.Experimental provision comprises high-pressure section, low-pressure section and cardboard adjustment portion.This device simplifies the tedious steps adjusting Distance geometry ratio in paper oil insulation test in the past, oil clearance width and oilpaper ratio can be regulated flexibly and easily, be applicable to the withstand voltage contrast test under direct current, interchange and alternating current-direct current compound field, for paper oil insulation experiment provides the operating concept of innovation and good experimental basis.This apparatus structure is simple, and easy to operate, test findings shows to obtain good test effect.
Description
Technical field
The present invention relates to insulation of electrical installation on-line monitoring and fault diagnosis field, particularly a kind of experimental provision being convenient to oil clearance width and oilpaper ratio all adjustable transformer oil paper insulation disruptive strength under direct current, interchange and alternating current-direct current compound field.
Background technology
Power transformer, as the core of energy conversion in delivery of electrical energy and delivery process, is equipment that is most important in equipment safety operation and most critical.The major accident of transformer can cause the interruption of electric power supply, and causes huge economic loss.Research shows, the transformer fault that transformer is caused by interior Insulation Problems accounts for major part.Transformer Oil-Paper Insulation is the important component part of insulation in it, the distortion that paper oil insulation media interior will cause internal electric field to distribute due to the accumulation of space charge, serious electric field distortion will cause the puncturing with aging of Oil-Paper Insulation, thus threatens the safety and reliability of operating transformer.
And in DC transmission system, converter power transformer is as one of most important power equipment, in it, insulation adopts the composite insulation structure that transformer oil and insulating paper are formed mostly, and puncturing of paper oil insulation material will directly affect the safety and reliability of insulation system with aging; In addition, converter transformer valve-side major insulation had both born the electric field action of whole electric field action that AC transformer bears and trial voltage, also to bear the DC electric field effect in normal work simultaneously, when having an accident or the effect of reversal of poles voltage, therefore its insulation system need bear alternating current-direct current compound field.Oil-paper combination insulation is typical laminated insulation structure, its breakdown characteristics depends on the voltage's distribiuting relation of compound field in transformer oil and immersion oil cardboard and oilpaper distribution proportion relation, therefore in order to analogue transformer operating condition better, direct current, interchange and alternating current-direct current compound field should be applied in test, disruptive strength test is carried out, for transformer actual motion provides technical foundation by change oil clearance width, oilpaper ratio.
Summary of the invention
In view of this, technical matters to be solved by this invention is to provide a kind of paper oil insulation disruptive strength experimental provision and method.
An object of the present invention is the experimental provision proposing a kind of oil clearance width and the adjustable paper oil insulation disruptive strength test electrode of oilpaper ratio; Two of object of the present invention is the experimental techniques proposing a kind of oil clearance width and the adjustable paper oil insulation disruptive strength test electrode of oilpaper ratio.
An object of the present invention is achieved through the following technical solutions:
A kind of paper oil insulation disruptive strength experimental provision provided by the invention, comprises lubricating cup, high-field electrode, low-field electrode, fixed support and cardboard platform;
Described high-field electrode one end is used for being connected with high-voltage power supply, and the other end runs through lubricating cup wall of cup and is connected with the low-field electrode one end being arranged at lubricating cup inside, the other end ground connection of described low-field electrode;
Described high-field electrode and low-field electrode are symmetricly set in the both sides of lubricating cup;
Described fixed support is arranged at outside lubricating cup wall of cup; Described fixed support is positioned at the cardboard regulating device be also provided with above lubricating cup rim of a cup for fixing cardboard platform;
Described cardboard platform one end is connected with cardboard regulating device, and the other end is arranged at the gap of two low-field electrodes being positioned at lubricating cup inside.
Further, described cardboard regulating device is the turn adjusting screw(rod) being symmetricly set in fixed support both sides, and described turn adjusting screw(rod) forms in lubricating cup inside the gripping end being used for fixing cardboard platform.
Further, described cardboard platform comprises stator, lower stator and U-shaped pad;
Fixed comprises two the upper organic glass rectangular sheets be formed by connecting through bolt, by clamping turn screw rod end outside described upper organic glass rectangular sheet, fits inside described upper organic glass rectangular sheet with U-shaped pad top;
Described lower stator comprises two the lower organic glass rectangular sheets be formed by connecting through nut, fits inside described lower organic glass rectangular sheet with U-shaped pad bottom, unsettled outside described lower organic glass rectangular sheet;
Described U-shaped gasket shape is inverted U-shaped, opening down.
Further, described high-field electrode runs through lubricating cup wall of cup by axostylus axostyle, and described axostylus axostyle places oil-leakage-prevention rubber band through in the hole of wall of cup; Described low-field electrode runs through lubricating cup wall of cup by axostylus axostyle, and described axostylus axostyle places oil-leakage-prevention rubber band through in the hole of wall of cup.
Further, described fixed support internal diameter is equal with lubricating cup external diameter, is placed on lubricating cup outer wall projection, higher than lubricating cup open height.
Further, the axostylus axostyle of described high-field electrode and low-field electrode arranges axostylus axostyle fixed screw near wall of cup side, described axostylus axostyle inner hollow place electrodes span scale; Described electrode span scale outboard end coupling nut, and screwed by screw thread at axostylus axostyle outer openings place.
Further, described fixed support is being provided with bracket holes higher than lubricating cup open height place, and described bracket holes arranges internal thread;
The described turn adjusting screw(rod) body of rod arranges external thread and bracket holes compact siro spinning technology, moves upper stator by turn screw rod;
Fixed center is provided with fixing film perforation, and described fixing film perforation is provided with internal thread, and is connected by screw threads for fastening with turn adjusting screw(rod).
Further, the described turn adjusting screw(rod) body of rod is carved with a millimeter scale strip; Described lubricating cup cup is fired by stupalith and is formed;
Described high-field electrode, low-field electrode, axostylus axostyle, turn adjusting screw(rod) are made by copper product;
Described fixed support, upper stator, lower stator and bolt are made by organic glass;
Described U-shaped pad is made up of epoxide resin material.
Two of object of the present invention is achieved through the following technical solutions:
The experimental technique of oil clearance width provided by the invention and the adjustable paper oil insulation disruptive strength test electrode of oilpaper ratio, comprises the following steps:
S1: dried transformer oil and insulating paper are put into aging casing and carries out aging;
S2: take out oil sample and pour in lubricating cup from ageing oven, leaves standstill after it is even, carries out the broad-adjustable oil-paper combination insulation disruptive strength test of oil clearance;
S3: insulating paper is fixedly inserted cardboard platform, carry out oil clearance width and oilpaper ratio adjustable oil-paper combination insulation disruptive strength test.
Further, in described step S1, transformer oil and insulating paper are dry and ageing process is specific as follows: first by insulating paper in 90 DEG C/50Pa environment dry 48 hours, then insulating paper is put into transformer oil at 40 DEG C/50Pa environment degassed 48 hours, then insulating paper is put into ageing oven and carry out aging; Required transformer oil is put into sealable tank, puts into ageing oven after extracting vacuum and carry out aging;
In described step S2, oil clearance broad-adjustable disruptive strength test process is specific as follows: axostylus axostyle fixed screw of first outwarding winding changes low-field electrode clearance distance, described clearance distance is read by electrode span scale, with upper and lower stator fixed insulation paper top, bottom respectively, by the fixing upper stator of the gripping end of turn adjusting screw(rod); Again whole device is put into high-pressure test platform, after connecting circuit, high pressure is applied to this device; Progressively improve and apply voltage, after device interior oil gap punctures, record now applied magnitude of voltage; Disconnecting circuit after off-test, axostylus axostyle fixed screw of again outwarding winding, changes electrode distance, changes pattern, tests the oil-paper combination insulation disruptive strength under this oil clearance width;
In described step S3 oil clearance width and the adjustable oil-paper combination insulation disruptive strength test process of oilpaper ratio specific as follows: get oil-immersed insulating paper, with upper and lower stator fixed insulation paper top, bottom respectively, by the fixing upper stator of the gripping end of turn adjusting screw(rod), again whole device is put into high-pressure test platform, after connecting circuit, high pressure is applied to this device; Progressively improve and apply voltage, after device interior oil paper insulation punctures, record now applied magnitude of voltage; Disconnecting circuit after off-test, changes multilayer oil-immersed insulating paper, and after using U-shaped pad to adjust the spacing of cardboard platform, mobile turn adjusting screw(rod), by stepping up stator on end winding support, tests the oil-paper combination insulation disruptive strength under this oilpaper ratio.
The invention has the advantages that: the invention provides a kind of paper oil insulation disruptive strength experimental provision and method.This device simplifies the tedious steps adjusting Distance geometry ratio in paper oil insulation test in the past, for paper oil insulation experiment provides the realization approach of innovation and good experimental basis; This apparatus structure is simple, and easy to operate, test findings shows to obtain good test effect, and the advantage of this device is specific as follows:
1. can adjust oil clearance width flexibly and easily, for the contrast test such as disruptive strength of oil-paper combination insulation under different oil clearance width provides good experimental basis.
2. can regulate oilpaper ratio flexibly and easily, for the contrast tests such as the oil-paper combination insulation disruptive strength under different oilpaper ratio provide good experimental basis.
3. this device is applicable to the disruptive strength test under interchange, direct current and alternating current-direct current Composite Field, for the disruptive strength test under different alternating current-direct current composition electric field providing good experimental basis.
Accompanying drawing explanation
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, wherein:
Fig. 1 is the adjustable paper oil insulation disruptive strength test electrode test unit of oil clearance width and oilpaper ratio;
Fig. 2 is the cardboard platform structure schematic diagram in test electrode test unit;
Fig. 3 is the adjustable paper oil insulation disruptive strength test electrode test method process flow diagram of oil clearance width and oilpaper ratio.
Wherein, 1, lubricating cup; 2, axostylus axostyle fixed screw; 3, fixed support; 4, turn adjusting screw(rod); 5, low-field electrode; 6, lower stator; 7, upper stator; 8, filling pad; 9, electrode span scale.
Embodiment
Below with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail; Should be appreciated that preferred embodiment only in order to the present invention is described, instead of in order to limit the scope of the invention.
Fig. 1 is the adjustable paper oil insulation disruptive strength test electrode test unit of oil clearance width and oilpaper ratio, and Fig. 2 is the cardboard platform structure schematic diagram in test electrode test unit, and wherein, 1 is lubricating cup, is built form by dedicated ceramic; 2 is the axostylus axostyle fixed screw of electrode, is made up of copper product; 3 is fixed support, is made up of pmma material, and its internal diameter is equal with lubricating cup external diameter; 4 is turn adjusting screw(rod), is made up of copper product; 5 is low-field electrode, is made up of copper product, and structural parameters need meet Standard; 6 is lower stator, is formed by connecting through bolt (for organic glass material) by two organic glass thin slices; 7 is upper stator, is formed by connecting through bolt (for organic glass material) by two organic glass thin slices; 8 is " U " type pad, for epoxide resin material, machining precision need meet the specification requirement of standard component, as shown in the figure: the experimental provision of oil clearance width provided by the invention and the adjustable paper oil insulation disruptive strength test electrode of oilpaper ratio, electrode assembly in use oil clearance width and oilpaper ratio adjustable, comprise lubricating cup, high-field electrode, low-field electrode, fixed support and cardboard platform;
Described high-field electrode one end is used for being connected with high-voltage power supply, and the other end runs through lubricating cup wall of cup and is connected with the low-field electrode one end being arranged at lubricating cup inside, the other end ground connection of described low-field electrode;
Described high-field electrode and low-field electrode are symmetricly set in the both sides of lubricating cup; Low-field electrode is high-field electrode to lateral electrode;
Described fixed support is arranged at outside lubricating cup wall of cup; Described fixed support is positioned at the cardboard regulating device be also provided with above lubricating cup rim of a cup for fixing cardboard platform;
Described cardboard platform one end is connected with cardboard regulating device, and the other end is arranged at the gap of two low-field electrodes being positioned at lubricating cup inside.
Described cardboard regulating device is the turn adjusting screw(rod) being symmetricly set in fixed support both sides, and described turn adjusting screw(rod) forms in lubricating cup inside the gripping end being used for fixing cardboard platform.
Described cardboard platform comprises stator, lower stator and U-shaped pad;
Fixed comprises two the upper organic glass rectangular sheets be formed by connecting through bolt, by clamping turn screw rod end outside described upper organic glass rectangular sheet, fits inside described upper organic glass rectangular sheet with U-shaped pad top;
Described lower stator comprises two the lower organic glass rectangular sheets be formed by connecting through nut, fits inside described lower organic glass rectangular sheet with U-shaped pad bottom, unsettled outside described lower organic glass rectangular sheet;
Described U-shaped gasket shape is inverted U-shaped, opening down.
Described high-field electrode runs through lubricating cup wall of cup by axostylus axostyle, and described axostylus axostyle places oil-leakage-prevention rubber band through in the hole of wall of cup; Described low-field electrode runs through lubricating cup wall of cup by axostylus axostyle, and described axostylus axostyle places oil-leakage-prevention rubber band through in the hole of wall of cup.
Described fixed support internal diameter is equal with lubricating cup external diameter, is placed on lubricating cup outer wall projection, higher than lubricating cup open height.
The axostylus axostyle of described high-field electrode and low-field electrode arranges axostylus axostyle fixed screw near wall of cup side, described axostylus axostyle inner hollow place electrodes span scale; Described electrode span scale outboard end coupling nut, and screwed by screw thread at axostylus axostyle outer openings place.
Described fixed support is being provided with bracket holes higher than lubricating cup open height place, and described bracket holes arranges internal thread;
The described turn adjusting screw(rod) body of rod arranges external thread and bracket holes compact siro spinning technology, moves upper stator by turn screw rod;
Fixed center is provided with fixing film perforation, and described fixing film perforation is provided with internal thread, and is connected by screw threads for fastening with turn adjusting screw(rod).
The described turn adjusting screw(rod) body of rod is carved with a millimeter scale strip; Described lubricating cup cup is fired form by being tested dedicated ceramic material;
Described high-field electrode, low-field electrode, axostylus axostyle, turn adjusting screw(rod) are made by copper product;
Described fixed support, upper stator, lower stator and bolt are made by organic glass;
Described U-shaped pad is made up of epoxide resin material.
Fig. 3 is the adjustable paper oil insulation disruptive strength test electrode test method process flow diagram of oil clearance width and oilpaper ratio, as shown in the figure, the experimental technique of the oil clearance width that the embodiment of the present invention provides and the adjustable paper oil insulation disruptive strength test electrode of oilpaper ratio, comprises the following steps:
S1: dried transformer oil and insulating paper are put into aging casing and carries out aging;
S2: take out oil sample and pour in lubricating cup from ageing oven, leaves standstill after it is even, carries out the broad-adjustable oil-paper combination insulation disruptive strength test of oil clearance;
S3: insulating paper is fixedly inserted cardboard platform, carry out oil clearance width and oilpaper ratio adjustable oil-paper combination insulation disruptive strength test.
In described step S1, transformer oil and insulating paper are dry and ageing process is specific as follows: first by insulating paper in 90 DEG C/50Pa environment dry 48 hours, then insulating paper is put into transformer oil at 40 DEG C/50Pa environment degassed 48 hours, then insulating paper is put into ageing oven and carry out aging; Required transformer oil is put into sealable tank, puts into ageing oven after extracting vacuum and carry out aging;
In described step S2, oil clearance broad-adjustable disruptive strength test process is specific as follows: axostylus axostyle fixed screw of first outwarding winding changes low-field electrode clearance distance, described clearance distance is read by electrode span scale 9, with upper and lower stator fixed insulation paper top, bottom respectively, by the fixing upper stator of the gripping end of turn adjusting screw(rod); Again whole device is put into high-pressure test platform, after connecting circuit, high pressure is applied to this device; Progressively improve and apply voltage, after device interior oil gap punctures, record now applied magnitude of voltage; Disconnecting circuit after off-test, axostylus axostyle fixed screw of again outwarding winding, changes electrode distance, changes pattern, tests the oil-paper combination insulation disruptive strength under this oil clearance width;
In described step S3 oil clearance width and the adjustable oil-paper combination insulation disruptive strength test process of oilpaper ratio specific as follows: get oil-immersed insulating paper, with upper and lower stator fixed insulation paper top, bottom respectively, by the fixing upper stator of the gripping end of turn adjusting screw(rod), again whole device is put into high-pressure test platform, after connecting circuit, high pressure is applied to this device; Progressively improve and apply voltage, after device interior oil paper insulation punctures, record now applied magnitude of voltage; Disconnecting circuit after off-test, changes multilayer oil-immersed insulating paper, and after using U-shaped pad to adjust the spacing of cardboard platform, mobile turn adjusting screw(rod), by stepping up stator on end winding support, tests the oil-paper combination insulation disruptive strength under this oilpaper ratio.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (8)
1. a paper oil insulation disruptive strength experimental provision, is characterized in that: comprise lubricating cup, high-field electrode, low-field electrode, fixed support and cardboard platform;
Described high-field electrode one end is used for being connected with high-voltage power supply, and the other end runs through lubricating cup wall of cup and is connected with the low-field electrode one end being arranged at lubricating cup inside, the other end ground connection of described low-field electrode;
Described high-field electrode and low-field electrode are symmetricly set in the both sides of lubricating cup;
Described fixed support is arranged at outside lubricating cup wall of cup; Described fixed support is positioned at the cardboard regulating device be also provided with above lubricating cup rim of a cup for fixing cardboard platform;
Described cardboard platform one end is connected with cardboard regulating device, and the other end is arranged at the gap of two low-field electrodes being positioned at lubricating cup inside;
Described cardboard regulating device is the turn adjusting screw(rod) being symmetricly set in fixed support both sides, and described turn adjusting screw(rod) forms in lubricating cup inside the gripping end being used for fixing cardboard platform;
Described cardboard platform comprises stator, lower stator and U-shaped pad;
Fixed comprises two the upper organic glass rectangular sheets be formed by connecting through bolt, by clamping turn screw rod end outside described upper organic glass rectangular sheet, fits inside described upper organic glass rectangular sheet with U-shaped pad top;
Described lower stator comprises two the lower organic glass rectangular sheets be formed by connecting through nut, fits inside described lower organic glass rectangular sheet with U-shaped pad bottom, unsettled outside described lower organic glass rectangular sheet;
Described U-shaped gasket shape is inverted U-shaped, opening down.
2. paper oil insulation disruptive strength experimental provision according to claim 1, is characterized in that: described high-field electrode runs through lubricating cup wall of cup by axostylus axostyle, and described axostylus axostyle places oil-leakage-prevention rubber band through in the hole of wall of cup; Described low-field electrode runs through lubricating cup wall of cup by axostylus axostyle, and described axostylus axostyle places oil-leakage-prevention rubber band through in the hole of wall of cup.
3. paper oil insulation disruptive strength experimental provision according to claim 1, is characterized in that: described fixed support internal diameter is equal with lubricating cup external diameter, is placed on lubricating cup outer wall projection, higher than lubricating cup open height.
4. paper oil insulation disruptive strength experimental provision according to claim 1, is characterized in that: the axostylus axostyle of described high-field electrode and low-field electrode arranges axostylus axostyle fixed screw near wall of cup side, described axostylus axostyle inner hollow place electrodes span scale; Described electrode span scale outboard end coupling nut, and screwed by screw thread at axostylus axostyle outer openings place.
5. paper oil insulation disruptive strength experimental provision according to claim 1, is characterized in that: described fixed support is being provided with bracket holes higher than lubricating cup open height place, and described bracket holes arranges internal thread;
The described turn adjusting screw(rod) body of rod arranges external thread and bracket holes compact siro spinning technology, moves upper stator by turn adjusting screw(rod);
Fixed center is provided with fixing film perforation, and described fixing film perforation is provided with internal thread, and is connected by screw threads for fastening with turn adjusting screw(rod).
6. paper oil insulation disruptive strength experimental provision according to claim 1, is characterized in that: the described turn adjusting screw(rod) body of rod is carved with a millimeter scale strip; Described lubricating cup cup is fired by stupalith and is formed;
Described high-field electrode, low-field electrode, axostylus axostyle and turn adjusting screw(rod) are made by copper product;
Described fixed support, upper stator, lower stator and bolt are made by organic glass;
Described U-shaped pad is made up of epoxide resin material.
7. the paper oil insulation disruptive strength experimental technique that carries out of paper oil insulation disruptive strength experimental provision according to claim 1, is characterized in that: comprise the following steps:
S1: dried transformer oil and insulating paper are put into aging casing and carries out aging;
S2: take out oil sample and pour in lubricating cup from ageing oven, leaves standstill after it is even, carries out the broad-adjustable oil-paper combination insulation disruptive strength test of oil clearance;
S3: insulating paper is fixedly inserted cardboard platform, carry out oil clearance width and oilpaper ratio adjustable oil-paper combination insulation disruptive strength test.
8. paper oil insulation disruptive strength experimental technique according to claim 7, it is characterized in that: in described step S1, transformer oil and insulating paper are dry and ageing process is specific as follows: first by insulating paper in 90 DEG C/50Pa environment dry 48 hours, then insulating paper is put into transformer oil at 40 DEG C/50Pa environment degassed 48 hours, then insulating paper is put into ageing oven and carry out aging; Required transformer oil is put into sealable tank, puts into ageing oven after extracting vacuum and carry out aging;
In described step S2, oil clearance broad-adjustable disruptive strength test process is specific as follows: axostylus axostyle fixed screw of first outwarding winding changes low-field electrode clearance distance, described clearance distance is read by electrode span scale, with upper and lower stator fixed insulation paper top, bottom respectively, by the fixing upper stator of the gripping end of turn adjusting screw(rod); Again whole device is put into high-pressure test platform, after connecting circuit, high pressure is applied to this device; Progressively improve and apply voltage, after device interior oil gap punctures, record now applied magnitude of voltage; Disconnecting circuit after off-test, axostylus axostyle fixed screw of again outwarding winding, changes electrode distance, changes pattern, tests the oil-paper combination insulation disruptive strength under this oil clearance width;
In described step S3 oil clearance width and the adjustable oil-paper combination insulation disruptive strength test process of oilpaper ratio specific as follows: get oil-immersed insulating paper, with upper and lower stator fixed insulation paper top, bottom respectively, by the fixing upper stator of the gripping end of turn adjusting screw(rod), again whole device is put into high-pressure test platform, after connecting circuit, high pressure is applied to this device; Progressively improve and apply voltage, after device interior oil paper insulation punctures, record now applied magnitude of voltage; Disconnecting circuit after off-test, changes multilayer oil-immersed insulating paper, and after using U-shaped pad to adjust the spacing of cardboard platform, mobile turn adjusting screw(rod), by stepping up stator on end winding support, tests the oil-paper combination insulation disruptive strength under this oilpaper ratio.
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| CN103605057A (en) | 2014-02-26 |
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