CN203398758U - Novel rod-plate-rod protection gap apparatus for protecting transformer neutral points - Google Patents

Novel rod-plate-rod protection gap apparatus for protecting transformer neutral points Download PDF

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Publication number
CN203398758U
CN203398758U CN201320513950.5U CN201320513950U CN203398758U CN 203398758 U CN203398758 U CN 203398758U CN 201320513950 U CN201320513950 U CN 201320513950U CN 203398758 U CN203398758 U CN 203398758U
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CN
China
Prior art keywords
rod
slide block
transformer neutral
plate
adjustable
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.)
Withdrawn - After Issue
Application number
CN201320513950.5U
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Chinese (zh)
Inventor
严玉婷
余鹏
鲁海亮
姚森敬
王亚舟
文习山
朱正国
李佳
陈思琳
杜祎
邓世聪
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.)
Wuhan University WHU
Shenzhen Power Supply Bureau Co Ltd
Original Assignee
Wuhan University WHU
Shenzhen Power Supply Bureau Co Ltd
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Publication date
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Priority to CN201320513950.5U priority Critical patent/CN203398758U/en
Application granted granted Critical
Publication of CN203398758U publication Critical patent/CN203398758U/en
Withdrawn - After Issue legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a novel rod-plate-rod protection gap apparatus for protecting transformer neutral points, comprising an I-shaped steel base, a first base sliding block, a second base sliding block, a third base sliding block, a first pillar insulator, a second pillar insulator, a height adjustable pillar, a high pressure rod electrode, a low pressure rod electrode, a first height adjustable support, a second height adjustable support, a metal plate and a metal plate support. The novel rod-plate-rod protection gap apparatus allows a protective gap to act reliably in the case of power frequency overvoltage and not to act in the case of lightning overvoltage so as to cooperate with an arrester to protect transformer neutral points. The novel rod-plate-rod protection gap apparatus is used for protecting the transformer neutral points, avoids misoperation and failure to operate, insulates the transformer neutral points and meanwhile guarantees that the arrester in parallel connection with the apparatus can not explode due to long time of current passing.

Description

A kind of New bar-plate-rod protection inter space device of protecting transformer neutral point
Technical field
The utility model belongs to power transformation engineering technical field, relates to a kind of New bar-plate-rod protection inter space device of protecting transformer neutral point.
Background technology
110,220 kV systems adopt neutral point effective grounding mode, in order to limit single-line to ground fault electric current, prevent the requirements such as configuration of adjusting of communication interference and relaying protection, conventionally take the operation of some transformers isolated neutral.At present, the protection of earth-free transformer neutral point mainly contains excellent gap, gapless metal-oxide lighting arrester ,Bang gap 3 kind modes in parallel with metal oxide arrester.Operating experience shows, the power-frequency overvoltage that lightning overvoltage and amplitude are higher is larger to the harm of transformer neutral point insulation, adopts metal oxide arrester Yu Bang gap parallel way to have higher reliability to guaranteeing the security of operation of transformer.Its desirable matching principle of this protected mode is: power frequency, switching overvoltage are protected by gap action, and lightning overvoltage is protected by lightning arrestor movement.But, from current ruuning situation, reflecting that ,Bang gap and lightning arrester there will be the situation of malfunction, this will affect the reliability of operation of power networks.
Utility model content
The utility model is just in order to overcome transformer neutral point by rod-rod protection gap during with lightning arrester earth, and action dispersiveness in protection gap is too large, causes the two protective feature to be difficult to cooperation; Protection gap malfunction under lightning overvoltage causes zero-sequenceprotection action jumping main transformer, and protection gap tripping under internal overvoltage causes Explosion of on Arrester, and causes transformer neutral point to bear for a long time power-frequency overvoltage, and insulation safety is on the hazard.
Concrete, a kind of New bar-plate-rod protection inter space device of protecting transformer neutral point that the utility model provides, comprise: I-steel base, the first base slide block, the second base slide block, the 3rd base slide block, the first post insulator, the second post insulator, Height Adjustable pillar, high pressure bar electrode, low pressure bar electrode, the first adjustable-height support, the second adjustable-height support, metallic plate, metallic plate bearing;
Described the first base slide block, the second base slide block, the 3rd base slide block are entrenched in respectively on described I-steel base, can be along described I-steel base sliding, described the first base slide block carries described the first post insulator, and described high pressure bar electrode is arranged on described the first post insulator by the first adjustable-height support; Described the second base slide block is used for carrying described the second post insulator, and described metallic plate is fixed on described the second post insulator by described metallic plate bearing; Described the 3rd base slide block is used for carrying described Height Adjustable pillar, and described low pressure bar electrode is arranged on described Height Adjustable pillar by described the second adjustable-height support.
Wherein, described metallic plate has floating potential.
Wherein, described high pressure bar electrode inserts on described the first post insulator by described the first adjustable-height support level; Described low pressure bar electrode inserts on described Height Adjustable pillar by described the second adjustable-height support level.
The device that the utility model provides by inserting a metallic plate with floating potential in transformer neutral point rod-rod protection gap; thereby can shorten gap coverage; change the Electric Field Distribution in gap; and then improve transformer neutral point and protect gap operating characteristics; reduce the dispersiveness of protection gap discharge; reduce the power-frequency sparkover voltage in protection gap, improve the lightning impulse discharge voltage in protection gap.Rod-rod protection length in gap and the distance of bar electrode and metallic plate all can regulate, and metallic plate can be changed different specifications, due to different protection gap lengths, the distance at the specification of metallic plate and protection gap low-pressure end and metallic plate center, all influential to the operating characteristics in this novel protected gap, so overvoltage level that need to occur according to transformer neutral point in actual moving process, determine the size of this protection gap each several part, thereby can make the operating characteristics in this New bar-rod protection gap well coordinate with lightning arrester, and then in being applied to transformer neutral point protection, reach the object of avoiding mistake action and rejecting action, the insulation of protection transformer neutral point, and guarantee that lightning arrester in parallel with it can be owing to blasting by current time is long.
Implement the utility model, its beneficial effect is:
Reduce the power-frequency sparkover voltage in rod-rod protection gap, protection transformer neutral point, reduces the probability that lightning arrester is subject to the infringement of power-frequency overvoltage.
Improve the impulse sparkover voltage in rod-rod protection gap, while guaranteeing lightning arrestor movement, gap can misoperation, the insulation safety of more effective protection neutral point under lightning overvoltage and switching overvoltage.
Accompanying drawing explanation
A kind of structural representation of protecting New bar-plate-rod protection inter space device of transformer neutral point that Fig. 1 provides for the utility model.
Embodiment
Before describing the New bar-plate of protection transformer neutral point of the present utility model-rod protection inter space device, first as follows to the represented part description of label in diagram:
1 represents I-steel base; 2.3.4 represent respectively the first base slide block, the second base slide block, the 3rd base slide block; 5.6 represent respectively the first post insulator and the second post insulator; 7 represent Height Adjustable pillar; 80 and 81 represent adjustable for height bearing; 9 represent the bearing of fixed metal plate; 10,11 represent respectively high pressure bar electrode and low pressure bar electrode; 12 represent metallic plate; 13 represent earth connection.
Technological core of the present utility model is that certain position inserts a square metal plate with floating potential in the middle of rod-rod protection gap; metallic plate can be changed specification according to different requirements; thereby play the power-frequency sparkover voltage that reduces protection gap, improve the effect of the lightning impulse discharge voltage in protection gap.
As shown in Figure 1, a kind of New bar-plate-rod protection inter space device of protecting transformer neutral point that the utility model provides, comprise: I-steel base 1, the first base slide block 2, the second base slide block 3, the 3rd base slide block 4, the first post insulators 5, the second post insulator 6, Height Adjustable pillar 7, high pressure bar electrode 10, low pressure bar electrode 11, the first adjustable-height support 80, the second adjustable-height support 81, metallic plate 12, metallic plate bearing 9 and earth connection 13;
Described the first base slide block 2, the second base slide block 3, the 3rd base slide block 4 are entrenched in respectively on described I-steel base 1, can slide along described I-steel base 1, described the first post insulator 5 of described the first base slide block 2 carrying, described high pressure bar electrode 10 is arranged on described the first post insulator 5 by the first adjustable-height support 80; Described the second base slide block 3 is for carrying described the second post insulator 6, and described metallic plate 12 is fixed on described the second post insulator 6 by described metallic plate bearing 9; Described the 3rd base slide block 5 is for carrying described Height Adjustable pillar 7, and described low pressure bar electrode 11 is arranged on described Height Adjustable pillar 7 by described the second adjustable-height support 81.In concrete implementation, described the first post insulator 5 and the second post insulator 6 are the post insulator of two FZSW-110/8 models.
Wherein, described metallic plate has floating potential.
Wherein, described high pressure bar electrode inserts on described the first post insulator by described the first adjustable-height support level; Described low pressure bar electrode inserts on described Height Adjustable pillar by described the second adjustable-height support level.
Syndeton of the present utility model is: three base slide blocks 2,3,4 are installed on I-steel base 1, successively by two post insulators 5 and 6 and Height Adjustable pillar 7 be respectively fixed on base slide block 2,3,4, again low pressure bar electrode 11 levels are fixed on bearing 81, metallic plate 12 is vertically fixed on metallic plate bearing 9, be respectively fixed on two post insulators 5 and 6, finally high pressure bar electrode 10 levels be fixed to bearing 80 and be fixed on Height Adjustable pillar 7, by earth connection 13 ground connection.For meeting the requirement of different electric pressures, can regulate low pressure bar electrode, metallic plate and the triangular distance of high pressure bar electrode by slide block, the specification of all right remetal.
The device that the utility model provides by inserting a metallic plate with floating potential in transformer neutral point rod-rod protection gap; thereby can shorten gap coverage; change the Electric Field Distribution in gap; and then improve transformer neutral point and protect gap operating characteristics; reduce the dispersiveness of protection gap discharge; reduce the power-frequency sparkover voltage in protection gap, improve the impulse sparkover voltage in protection gap.Rod-rod protection length in gap and the distance of bar electrode and metallic plate all can regulate, and metallic plate can be changed different specifications, due to different protection gap lengths, the distance at the specification of metallic plate and protection gap low-pressure end and metallic plate center, all influential to the operating characteristics in this novel protected gap, so overvoltage level that need to occur according to transformer neutral point in actual moving process, determine the size of this each each several part of protection gap, thereby can make the operating characteristics in this New bar rod protection gap well coordinate with lightning arrester, and then when being applied to transformer neutral point protection, reach the object of avoiding mistake action and rejecting action, the insulation of protection transformer neutral point, and guarantee that lightning arrester in parallel with it can be owing to blasting by current time is long.
Implement the utility model, its beneficial effect is:
Reduce the power-frequency sparkover voltage in rod-rod protection gap, protection transformer neutral point, reduces the probability that lightning arrester is subject to power-frequency overvoltage infringement.
Improve the impulse sparkover voltage in rod-rod protection gap, while guaranteeing lightning arrestor movement, gap can misoperation, the insulation safety of more effective protection neutral point under lightning overvoltage and power-frequency overvoltage.
Above disclosed is only a kind of preferred embodiment of the utility model, certainly can not limit with this interest field of the utility model, and the equivalent variations of therefore doing according to the utility model claim, still belongs to the scope that the utility model is contained.

Claims (3)

1. protect New bar-plate-rod of transformer neutral point to protect inter space device for one kind, it is characterized in that, comprise: I-steel base, the first base slide block, the second base slide block, the 3rd base slide block, the first post insulator, the second post insulator, Height Adjustable pillar, high pressure bar electrode, low pressure bar electrode, the first adjustable-height support, the second adjustable-height support, metallic plate, metallic plate bearing;
Described the first base slide block, the second base slide block, the 3rd base slide block are entrenched in respectively on described I-steel base, can be along described I-steel base sliding, described the first base slide block carries described the first post insulator, and described high pressure bar electrode is arranged on described the first post insulator by the first adjustable-height support; Described the second base slide block is used for carrying described the second post insulator, and described metallic plate is fixed on described the second post insulator by described metallic plate bearing; Described the 3rd base slide block is used for carrying described Height Adjustable pillar, and described low pressure bar electrode is arranged on described Height Adjustable pillar by described the second adjustable-height support.
2. New bar-the plate of protection transformer neutral point as claimed in claim 1-rod protection inter space device, is characterized in that, described metallic plate has floating potential.
3. New bar-the plate of protection transformer neutral point as claimed in claim 2-rod protection inter space device, is characterized in that, described high pressure bar electrode inserts on described the first post insulator by described the first adjustable-height support level; Described low pressure bar electrode inserts on described Height Adjustable pillar by described the second adjustable-height support level.
CN201320513950.5U 2013-08-22 2013-08-22 Novel rod-plate-rod protection gap apparatus for protecting transformer neutral points Withdrawn - After Issue CN203398758U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320513950.5U CN203398758U (en) 2013-08-22 2013-08-22 Novel rod-plate-rod protection gap apparatus for protecting transformer neutral points

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320513950.5U CN203398758U (en) 2013-08-22 2013-08-22 Novel rod-plate-rod protection gap apparatus for protecting transformer neutral points

Publications (1)

Publication Number Publication Date
CN203398758U true CN203398758U (en) 2014-01-15

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CN201320513950.5U Withdrawn - After Issue CN203398758U (en) 2013-08-22 2013-08-22 Novel rod-plate-rod protection gap apparatus for protecting transformer neutral points

Country Status (1)

Country Link
CN (1) CN203398758U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103414158A (en) * 2013-08-22 2013-11-27 深圳供电局有限公司 Novel bar-plate-bar protective gap device for protecting transformer neutral point
CN105958346A (en) * 2016-05-24 2016-09-21 国家电网公司 Tool for adjusting discharging gap between neutral point of main transformer and lightning arrester

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103414158A (en) * 2013-08-22 2013-11-27 深圳供电局有限公司 Novel bar-plate-bar protective gap device for protecting transformer neutral point
CN103414158B (en) * 2013-08-22 2016-09-21 深圳供电局有限公司 A kind of New bar plate rod portable protective gaps device protecting transformer neutral point
CN105958346A (en) * 2016-05-24 2016-09-21 国家电网公司 Tool for adjusting discharging gap between neutral point of main transformer and lightning arrester

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C14 Grant of patent or utility model
GR01 Patent grant
C25 Abandonment of patent right or utility model to avoid double patenting
AV01 Patent right actively abandoned

Granted publication date: 20140115

Effective date of abandoning: 20160921