CN106290998A - A kind of extra-high voltage transformer partial discharge test lead's insulation support - Google Patents

A kind of extra-high voltage transformer partial discharge test lead's insulation support Download PDF

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Publication number
CN106290998A
CN106290998A CN201610613231.9A CN201610613231A CN106290998A CN 106290998 A CN106290998 A CN 106290998A CN 201610613231 A CN201610613231 A CN 201610613231A CN 106290998 A CN106290998 A CN 106290998A
Authority
CN
China
Prior art keywords
extra
high voltage
circular arc
voltage transformer
partial discharge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610613231.9A
Other languages
Chinese (zh)
Inventor
赵军
邢超
韩光
刘宏亮
高树国
杨桦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd
Hebei Electric Power Construction Adjustment Test Institute
Original Assignee
State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd
Hebei Electric Power Construction Adjustment Test Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd, Hebei Electric Power Construction Adjustment Test Institute filed Critical State Grid Corp of China SGCC
Priority to CN201610613231.9A priority Critical patent/CN106290998A/en
Publication of CN106290998A publication Critical patent/CN106290998A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/02General constructional details
    • G01R1/04Housings; Supporting members; Arrangements of terminals

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Relating To Insulation (AREA)

Abstract

The present invention relates to a kind of extra-high voltage transformer partial discharge test lead's insulation support, it includes lead bearing mechanism and the pole threadeded with lead bearing mechanism;Meet when carrying out test connection insulation and the requirement of safe distance in terms of test lead stringing, eliminate and avoid the interference signal introduced due to test lead supporting structure, improve safety and the efficiency of on-the-spot extra-high voltage transformer partial discharge test, instead of the drawback that conventional test lead cannot support and fix, being smoothed out of test has been effectively ensured.

Description

A kind of extra-high voltage transformer partial discharge test lead's insulation support
Technical field
Present invention relates particularly to a kind of extra-high voltage transformer partial discharge test lead's insulation support, for meeting at the scene Carry out the demand of extra-high voltage transformer test lead supporting, prevent test lead in extra-high voltage transformer partial discharge test to be subject to weight Power effect sag and windage yaw are relatively big, cause going between to electronegative potential position electric discharges such as equipment, thus affect extra-high voltage transformer test Progress.Accordingly, it would be desirable to the lead's insulation support of a kind of potential safety hazard eliminated in test.
Background technology
Along with china natural resources environment and the contradiction of economic development, develop extra-high voltage electric transmission and transformation technology, build with Extra-high voltage grid is the strong national grid of bulk transmission grid, it is achieved Large Copacity, long distance power transmission become a kind of inevitable inherence to be needed Want.And the nucleus equipment of EHV power transformer this bulk transmission grid exactly, its safe and stable operation is related to whole The safety and stability of extra-high voltage grid.The partial discharge test of EHV power transformer is to evaluate extra-high voltage transformer insulation simultaneously The important indicator of situation quality.
At present when carrying out on-the-spot extra-high voltage transformer partial discharge test, test data precision prescribed is higher, for preventing The external disturbance such as corona introduce pilot system, and test lead needs to use metal bellows, owing to extra-high voltage transformer volume is huge Greatly, carry out test lead connect tested transformator when, test lead peripheral equipment or grounding body are had insulation away from From requirement, go between just to couple together testing transformer and tested transformator simultaneously due to needs relatively long distance.Therefore, to gold Belong to the length of corrugated tube and surrounding devices or grounding body distance are proposed requirement, and extra-high voltage transformer shelf depreciation examination at present Test and often there is no reliable test lead insulating support, or test lead can be caused damage follow-up to make by portion support With, affect extra-high voltage transformer partial discharge test safety and completion time of project.
Summary of the invention
It is an object of the invention to for problem present in above-mentioned on-the-spot test, and a kind of extra-high voltage transformer local is provided Discharge test lead's insulation support, to eliminate potential potential safety hazard and to improve the purpose of work efficiency, it is achieved that test job letter Folk prescription is just, it is ensured that smoothly completing of extra-high voltage transformer partial discharge test.
The present invention solves the technical scheme that its goal of the invention used:
A kind of extra-high voltage transformer partial discharge test lead's insulation support, it includes lead bearing mechanism and and lead bearing The pole that mechanism is threaded;Described lead bearing mechanism includes two circular arc support plates be arrangeding in parallel, is positioned at two described circles Multiple spacers between arc support plate and the fixing connecting plate connecting two described circular arc support plate lateral walls;Multiple described intervals Post be arranged in parallel, and two ends are fixed with circular arc support plate adjacent surface respectively and are connected, and described connecting plate one end is solid with two circular arc support plates Fixed connection, the other end is connected with pole by connecting plate screw;Described pole includes that multiple length is not the same from support rod structure Becoming, described support rod one end is provided with screw rod, and the other end is provided with screw, and described support rod, screw rod and screw are coaxially disposed, Described screw is blind hole, and described screw rod and screw are suitable, and described screw is identical with connecting plate screw;Described circular arc support plate, Spacer post, connecting plate, support rod are all insulant.
Further, described connecting plate is positioned on the angular bisector of the corresponding central angle of circular arc support plate 1.
Further, described circular arc support plate correspondence central angle is 180 °.
Further, described interval column length 30mm.
Further, described insulant is epoxy resin.
Further, described insulant is nylon.
Further, the interior diameter of a circle along circular arc place of described circular arc support plate is 210mm.
Further, described circular arc support plate, spacer connect by nylon bolt is fixing.
The present invention can use three joint insulation supporter bars combinations to form different length, to adapt to the erection need of differing heights Want.Three joint insulation supporter bar total lengths are 5m, can form tri-kinds of differing heights of 5m, 3m, 1.5m.Meet current extra-high voltage transformation Device partial discharge test lead-in wire sets up and needs.
Extra-high voltage transformer partial discharge test tested main body low pressure side test voltage 173kV to be reached at present, often Using diameter at the metal bellows of 150mm or 200mm, it is 10mm that inside passes to sectional area2The copper conductor of tape insulation crust, Under gravity and mild wind effect, sag and windage yaw are bigger, and for ensureing that metal bellows can obtain effectively supporting, support rod top is tied Structure inside diameter is designed as 210mm, so that two kinds of metal bellowss can enter groove and be fixed.
For ensureing insulating properties, considering the dielectric strength of supporting structure in design, selecting electrical strength is >=200kV/m Epoxide resin material and nylon material.
For preventing tip, supporting structure edge from scratching metal bellows, supporting structure edge is carried out chamfered.Simultaneously Nylon rod length is controlled at about 30mm, so that metal bellows and supporting structure have bigger contact area, effectively Protect metal bellows.
Selecting nylon rod to connect in the middle part of the lead bearing structure of first joint insulation supporter bar, weight is only 2500g, is convenient for carrying And use.
It is threaded that each joint insulating bar connecting portion is designed as epoxy resin, can avoid having when connecting for metal outstanding herein Floating electric discharge, overcoming this kind affects the defect that test data judges.
The invention have the benefit that
The present invention can improve safety and the efficiency of on-the-spot extra-high voltage transformer partial discharge test, it is easy to accomplish extra-high voltage transformation Device partial discharge test is to test lead insulation and the requirement of safe distance, and instead of conventional test lead cannot support and fix Drawback, be effectively ensured test be smoothed out.
Accompanying drawing explanation
Fig. 1 is insulating support structural representation of the present invention;
Fig. 2 is insulating support side structure schematic diagram of the present invention;
Fig. 3 is the present invention exhausted supporting rod structure schematic diagram;
In the accompanying drawings: 1 circular arc support plate, 2 spacers, 3 connecting plates, 4 support rods, 41 screw rods, 42 screws.
Detailed description of the invention
Below in conjunction with accompanying drawing, 1,2,3 couples of present invention carry out further details of narration.
Embodiment one, as illustrated in the accompanying drawings from 1 to 3, a kind of extra-high voltage transformer partial discharge test lead's insulation support, its bag Include lead bearing mechanism and the pole threadeded with lead bearing mechanism;Described lead bearing mechanism includes that two parallel set The circular arc support plate 1 put, the multiple spacers 2 between two described circular arc support plates 1 and two described circular arcs of fixing connection The connecting plate 3 of support plate 1 lateral wall;Multiple described spacers 2 be arranged in parallel, and two ends are fixed with circular arc support plate 1 adjacent surface respectively Connecting, described connecting plate 3 one end is fixing with two circular arc support plates 1 to be connected, and the other end is connected with pole by connecting plate screw;Institute Stating pole and include that multiple length is not the same from support rod 4 and constitutes, described support rod 4 one end is provided with screw rod 41, and the other end sets Being equipped with screw 42, described support rod 4, screw rod 41 and screw 42 are coaxially disposed, and described screw 42 is blind hole, described screw rod 41 and spiral shell Hole 42 is suitable, and described screw 42 is identical with connecting plate screw;Described circular arc support plate 1, spacer 2, connecting plate 3, support rod 4 are all It it is insulant.
Connecting plate 3 is positioned on the angular bisector of the corresponding central angle of circular arc support plate 1;The corresponding central angle of described circular arc support plate 1 is 180°;The described long 30mm of spacer 2;Described insulant is epoxy resin.The interior circle along circular arc place of described circular arc support plate 1 Diameter be 210mm.
The support of the present invention generally Y type, all insulant, and two the circular arc support plates 1 contacted with wire body are used Spacer 2 separates to be increased stress point and increases the spacing of two impetus, and multiple length are not the same from support rod 4 as required Combination connects formation pole, forms different length to adapt to different needs.
Considerably increase the safety of use, add the reliability of equipment.
Embodiment two, is with embodiment one difference, insulant is nylon;Circular arc support plate 1, spacer 2 pass through Nylon bolt is fixing to be connected.Nylon is ageing-resistant, and toughness is strong, smooth surface.
The above embodiment is only the preferred embodiments of the present invention, and and the feasible enforcement of non-invention exhaustive.Right For persons skilled in the art, to its done any showing on the premise of without departing substantially from the principle of the invention and spirit The change being clear to, within all should being contemplated as falling with the claims of the present invention.

Claims (8)

1. an extra-high voltage transformer partial discharge test lead's insulation support, it is characterised in that: it includes lead bearing mechanism And the pole threadeded with lead bearing mechanism;
Described lead bearing mechanism includes two circular arc support plates (1) be arrangeding in parallel, is positioned between two described circular arc support plates (1) Multiple spacers (2) and the fixing connecting plate (3) connecting two described circular arc support plate (1) lateral walls;Multiple described intervals Post (2) be arranged in parallel, and two ends are fixed with circular arc support plate (1) adjacent surface respectively and are connected, described connecting plate (3) one end and two circles Arc support plate (1) is fixing to be connected, and the other end is connected with pole by connecting plate screw;
Described pole includes that multiple length is not the same from support rod (4) and constitutes, and described support rod (4) one end is provided with screw rod (41), the other end is provided with screw (42), and described support rod (4), screw rod (41) and screw (42) are coaxially disposed, described screw (42) being blind hole, described screw rod (41) and screw (42) are suitable, and described screw (42) is identical with connecting plate screw;
Described circular arc support plate (1), spacer (2), connecting plate (3), support rod (4) are all insulant.
A kind of extra-high voltage transformer partial discharge test lead's insulation support the most according to claim 1, it is characterised in that: Described connecting plate (3) is positioned on the angular bisector of the corresponding central angle of circular arc support plate (1).
A kind of extra-high voltage transformer partial discharge test lead's insulation support the most according to claim 1, it is characterised in that: The corresponding central angle of described circular arc support plate (1) is 180 °.
A kind of extra-high voltage transformer partial discharge test lead's insulation support the most according to claim 1, it is characterised in that: Described spacer (2) long 30mm.
5. according to a kind of extra-high voltage transformer partial discharge test lead's insulation support described in any one of claim 1-4, its It is characterised by: described insulant is epoxy resin.
6. according to a kind of extra-high voltage transformer partial discharge test lead's insulation support described in any one of claim 1-4, its It is characterised by: described insulant is nylon.
A kind of extra-high voltage transformer partial discharge test lead's insulation support the most according to claim 5, it is characterised in that: The interior diameter of a circle along circular arc place of described circular arc support plate (1) is 210mm.
A kind of extra-high voltage transformer partial discharge test lead's insulation support the most according to claim 6, it is characterised in that: Described circular arc support plate (1), spacer (2) connect by nylon bolt is fixing.
CN201610613231.9A 2016-07-29 2016-07-29 A kind of extra-high voltage transformer partial discharge test lead's insulation support Pending CN106290998A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610613231.9A CN106290998A (en) 2016-07-29 2016-07-29 A kind of extra-high voltage transformer partial discharge test lead's insulation support

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610613231.9A CN106290998A (en) 2016-07-29 2016-07-29 A kind of extra-high voltage transformer partial discharge test lead's insulation support

Publications (1)

Publication Number Publication Date
CN106290998A true CN106290998A (en) 2017-01-04

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201188519Y (en) * 2008-04-29 2009-01-28 济南供电公司 Special support for maintaining 10KV overhead line
CN201522505U (en) * 2009-09-28 2010-07-07 石家庄供电公司 Lead connection tool for power equipment high-voltage test
CN201897604U (en) * 2010-10-27 2011-07-13 河南省电力公司商丘供电公司 High-voltage lead insulation bracket for high-voltage test
CN202339358U (en) * 2011-11-29 2012-07-18 河北省电力建设调整试验所 Test lead supporting device
CN103558420A (en) * 2013-10-23 2014-02-05 刘伟华 Primary current transmission test assist device for outdoor breaker
CN204575684U (en) * 2015-04-30 2015-08-19 国网黑龙江省电力有限公司鹤岗供电公司 Telescopic high-pressure test special isolation support bar

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201188519Y (en) * 2008-04-29 2009-01-28 济南供电公司 Special support for maintaining 10KV overhead line
CN201522505U (en) * 2009-09-28 2010-07-07 石家庄供电公司 Lead connection tool for power equipment high-voltage test
CN201897604U (en) * 2010-10-27 2011-07-13 河南省电力公司商丘供电公司 High-voltage lead insulation bracket for high-voltage test
CN202339358U (en) * 2011-11-29 2012-07-18 河北省电力建设调整试验所 Test lead supporting device
CN103558420A (en) * 2013-10-23 2014-02-05 刘伟华 Primary current transmission test assist device for outdoor breaker
CN204575684U (en) * 2015-04-30 2015-08-19 国网黑龙江省电力有限公司鹤岗供电公司 Telescopic high-pressure test special isolation support bar

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Application publication date: 20170104