CN102426963B - Direct-current ice-melting isolating switch - Google Patents
Direct-current ice-melting isolating switch Download PDFInfo
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- CN102426963B CN102426963B CN201110242809.1A CN201110242809A CN102426963B CN 102426963 B CN102426963 B CN 102426963B CN 201110242809 A CN201110242809 A CN 201110242809A CN 102426963 B CN102426963 B CN 102426963B
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- isolating switch
- post insulator
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- disconnecting link
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Abstract
The invention discloses an isolating switch which accesses direct current to a high-voltage power transmission line in direct-current ice melting of the high-voltage power transmission line in winter. The isolating switch for direct-current ice melting provided by the invention is simple and safe in operation, is small in occupied area, is simple in structure, is investment-saving, comprises an alternating-current support insulator, a direct-current support insulator and an operation support insulator that are installed on an isolating switch support; the alternating-current support insulator is provided with an alternating-current wiring terminal and a static contact which are connected; the direct-current support insulator is provided with a vertically-arranged electric conducting disconnecting link and a direct-current wiring terminal which are connected; an operating mechanism connecting rod of the electric conducting disconnecting link is connected with the electric conducting disconnecting link through the operation support insulator; and the static contact is arranged above the electric conducting disconnecting link, and when the electric conducting disconnecting link is switched on, a moving contact of the electric conducting disconnecting link is connected with the static contact. According to the invention, the danger of manual operation is avoided, the occupied area is small, the investment is saved, and the operation is convenient.
Description
Technical field
The present invention relates to a kind of electric power system high-tension power transmission and transformation equipment, when particularly a kind of ultra-high-tension power transmission line needs DC ice melting in the winter time, the direct current of DC de-icing device is accessed to the isolating switch of ultra-high-tension power transmission line.
Background technology
Transmission line in the winter time under freezing sleety weather icing be a kind of natural calamity of serious threat power system safety and stability operation.Owing to having increased icing load on wire, to wire, steel tower and gold utensil, all can bring certain mechanical failure, when icing is serious, can break, fall shaft tower, cause large area blackout; Along with the development of power electronic technology, heavy DC de-icing technology is widely used in the cross section transmission line ice-melt of different electric pressure different conductors, the party's ratio juris is using icing circuit as load, apply DC power supply, by low voltage, provide direct-current short circuit electric current to carry out heating wires line ice coating is melted.Heavy DC ice-melt need access ultra-high-tension power transmission line by direct current, and conventional cut-in method has: artificial cross-over connection scheme, common isolating switch cross-over connection scheme, install the schemes such as ice-melt pipe bus scheme, dolly cross-over connection scheme additional.
Artificial cross-over connection wire scheme is by the mode of manually installing, and directly uses preprepared cross-over connection wire, and direct current is accessed to ultra-high-tension power transmission line.This cross-over connection scheme, although floor space is little, invests littlely, simple to operate, because high voltage substation outlet structure is high, adopts interim cross-over connection scheme inefficiency, intensity of workers and operating risk high, and transmission line interruption duration is long, and cost is high.
Common isolating switch cross-over connection scheme is newly-increased one group of high pressure double-column horizontal open-type isolating switch between ice-melt pipe bus and high-voltage terminal circuit, one termination DC ice melting bus of this isolating switch, the other end is connected with ultra-high-tension power transmission line, because horizontally openable formula isolated switchgear overall dimension is large, be unfavorable for being arranged on the other narrow and small position of original lightning arrester, generally need to install again to open up the place that relative area is larger, and be the newly-increased isolating switch of protection, also need original leakage conductor to move to newly-increased isolating switch line side simultaneously, therefore floor space increases, invest high.And to rebuilding construction engineering, also need new expropriation of land, long construction period.
Installing ice-melt pipe bus scheme additional is to increase by two groups of ice-melt jumper pipe buses at transformer station's power distribution equipment outgoing line side, one group connects DC de-icing device DC tube bus, another group connects ultra-high-tension power transmission line, during ice-melt, with hard bus, connects two groups of pipe buses, and direct current is accessed to ultra-high-tension power transmission line.Though this kind of scheme invested the less outer expropriation of land that also do not need, and need use crane to connect ice-melt jumper pipe mother during ice-melt, cannot save time and human and material resources and financial resources; In the situation that freezing disaster is more intense, cannot meet the effect of quick ice-melt.
Dolly cross-over connection scheme is between ice-melt pipe bus and outlet circuit, to adopt the interim cross-over connection of special cart with isolating switch function, this dolly one termination DC ice melting pipe bus, and the other end is connected with circuit.In order to ensure the safe distance of equipment, this scheme enclosure wall need extend out, simultaneously for meeting being connected of cross-over connection dolly and circuit, need to install special tube connector bus, what also need configure dedicated has an isolating switch function dolly, separate unit dolly 1,500,000, and during ice-melt, often returning back out line needs three dollies altogether, amount to 4,500,000, therefore investment is large, and cost is high, also needs the construction in special garage parking simultaneously, and be subject to the impact of site environment, dolly complicated operation.
Summary of the invention
Technical problem to be solved by this invention be to provide a kind of simple to operate safe, take up an area DC ice melting isolating switch little, simple in structure, reduced investment.
Isolating switch for direct-current ice melting of the present invention, comprises the interchange post insulator, direct current post insulator and the operation post insulator that are arranged on isolating switch support; On interchange post insulator, AC terminal and fixed contact are installed, AC terminal is connected with fixed contact; Vertically arranged conduction disconnecting link and direct current binding post are installed on direct current post insulator, and above-mentioned conduction disconnecting link is connected with direct current binding post; The operating mechanism link of conduction disconnecting link is connected with conduction disconnecting link by operation post insulator; Above-mentioned fixed contact is arranged on conduction disconnecting link top, and when conduction disconnecting link closes a floodgate, the moving contact of conduction disconnecting link is connected with above-mentioned fixed contact.
On interchange post insulator, grading ring is installed; Fixed contact, AC terminal and grading ring are connected as a single entity.
AC terminal is mounted on the axis top that exchanges post insulator.
What described conduction disconnecting link adopted is the conduction disconnecting link of the vertical open type isolating switch of single-arm vertical retractable isolating switch, both arms vertical-telescopic isolating switch or single armed.
What described conduction disconnecting link adopted is the structure of the vertical open type isolating switch conduction of electrodynamic type single-arm vertical retractable isolating switch, electrodynamic type both arms vertical-telescopic isolating switch or electrodynamic type single armed disconnecting link.
The conductive seat of conduction disconnecting link is arranged on direct current post insulator and operation post insulator.
At isolating switch support, base is installed, exchanges post insulator, direct current post insulator and operation post insulator and be arranged on base; Operating mechanism link is connected with the link gear in conductive seat by operation post insulator.
The length of described interchange post insulator is greater than direct current post insulator and operation post insulator.Adopt the present invention, during ice-melt, can not need manually to arrive execute-in-place, avoided danger when manually cross-over connection wire and dolly operate temporarily and saved time and human and material resources and financial resources, meet the effect of quick ice-melt; Adopt the present invention, within the scope of existing transformer station land used, do not need outer expropriation of land, floor space is little, saves construction period, has also saved cost of land; Do not need equipment to have bad luck and park, therefore saved place, and invention equipment manufacturing cost is low, also saved equipment purchasing cost simultaneously.
Accompanying drawing explanation
Fig. 1 is DC ice melting isolating switch special gate-dividing state schematic diagram.
Fig. 2 is DC ice melting isolating switch special "on" position schematic diagram.
To be DC ice melting leave every special the gate-dividing state schematic diagram that pass is connected with DC bus and ultra-high-tension power transmission line to Fig. 3.
Mark in figure: 1-isolating switch support, 2-exchanges post insulator, 3-fixed contact, 4-direct current post insulator, 5-direct current binding post, 6-exchanges and connects wire, 7-DC bus support, 8-conducts electricity disconnecting link, 9-base, 10-operating mechanism link, 11-operating mechanism, 12-conductive seat, 13-DC bus, 14-direct current connects wire, 15-direct current post insulator, 16-grading ring, 17-AC terminal, 18-operates post insulator, 19-conducting rod, 20-moving contact.
Embodiment
Isolating switch for direct-current ice melting comprises the base 9 being arranged on isolating switch support 1, installs and exchange post insulator 2, direct current post insulator 4 and operation post insulator 18 on base 9.AC terminal son 17 and fixed contact 3 are installed on interchange post insulator 2, and AC terminal 17 is connected with fixed contact 3.Vertically arranged conduction disconnecting link 8 and direct current binding post 5 are installed on direct current post insulator 4, and conduction disconnecting link 8 is connected with direct current binding post 5.The operating mechanism link 10 of conduction disconnecting link 8 is connected with conduction disconnecting link 8 by operation post insulator 18.
On interchange post insulator 2, the grading ring 16 with uniform voltage function is installed, fixed contact 3, AC terminal 17, grading ring 16, fixed contact 3, AC terminal 17 are connected as a single entity, and fixed contact 3 need be avoided exchanging post insulator 2, are convenient to be connected with the moving contact of conduction disconnecting link 8.In order to reduce to exchange, to connect wire 6 and conduct oneself with dignity with the electric power producing in transmission of electricity process to exchanging the stressing influence of post insulator 2, AC terminal 17 is mounted on above the axis that exchanges post insulator 2.Adopt grading ring to make post insulator top live part electric-field intensity distribution even, reduce electric discharge flashover, prevent from because of electric discharge flashover, being burnt in post insulator full skirt surface.Insulating requirements when interchange post insulator 2 need to meet ac high-voltage work, and the requirement of 4 of direct current post insulators D.C. isolation need to meet ice-melt time, therefore be cost-saving and the setting height(from bottom) of reduction isolating switch, the length that exchanges post insulator 3 is greater than the length of direct current post insulator 5.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
In transformer station, mesohigh power distribution equipment outgoing line side is installed isolating switch for direct-current ice melting of the present invention and DC bus support 7.
On isolating switch support 1, be provided with one group and exchange post insulator 2, in the upper end that exchanges post insulator 2, grading ring 16 is installed.Fixed contact 3, AC terminal son 17 and grading ring 16 are connected as a single entity.This AC terminal 17 is by being connected wire 6 and connecting to realize with transmission line and be connected with exchanging.
In the present embodiment, what conduction disconnecting link 8 adopted is the conduction disconnecting link structure of electric single arm vertical-telescopic isolating switch, comprises conducting rod 19, conductive seat 12, operation post insulator 18, operating mechanism link 10, operating mechanism 11.On isolating switch support 1, be provided with direct current post insulator 4 and operation post insulator 18, conductive seat 12 is arranged on direct current post insulator 4, and operating mechanism link 10 is connected with the link gear in conductive seat 12 by operation post insulator 18.Direct current binding post 5 just adopts the power supply terminal on this electric single arm vertical-telescopic isolating switch.
Direct current post insulator 15 is installed on DC bus support 7, and DC bus 13 is arranged on above-mentioned direct current post insulator 15, and DC bus 13 is connected wire 14 with the direct current binding post 5 on electric single arm vertical-telescopic isolating switch by direct current and connects.
The operating state of DC ice melting isolating switch special comprises:
(1) normal ultra-high-tension power transmission line transmitting procedure: the moving contact of electric single arm vertical-telescopic isolating switch and fixed contact 3, in gate-dividing state, exchange post insulator 2 and meet ac high voltage insulating requirements.
(2) ice-melt state: when needs are during to high-tension line ice-melt, first cutoff high power supply, by motor-operating mechanism 11 control operation linkages 10, link gear in conductive seat 12 makes the moving contact on conducting rod 19 be connected with fixed contact 2, conduction disconnecting link 8 is just in "on" position, the direct current that DC bus 13 provides connects wire 14 through direct current, direct current binding post 5 on direct current post insulator 4, conductive seat 12, conducting rod 19, moving contact 20, fixed contact 3, AC terminal 17 is connected wire 6 with interchange direct current is input on high-voltage line, and form DC loop between three-phase high-voltage line, make ultra-high-tension power transmission line heating realize ice-melt.
Exchange post insulator 2 and guaranteed the insulation safety in normal high-voltage AC transmission process.Direct current post insulator 4 guarantees the insulation safety of DC ice melting voltage under ice-melt mode.
Compared with electronic both arms vertical-telescopic isolating switch, the vertical conduction disconnecting link of open type isolating switch of electric single arm and the conduction disconnecting link of electric single arm vertical-telescopic isolating switch, combined floodgate, separating brake motion mode and the structure of conducting rod 19 are different, but conductive seat 12, operation post insulator 18, operating mechanism link 10, operating mechanism 11 can adopt same way to be arranged on isolating switch support 1, can realize too the object of invention.
Claims (8)
1. isolating switch for direct-current ice melting, is characterized in that, comprises the interchange post insulator (2), direct current post insulator (4) and the operation post insulator (18) that are arranged on isolating switch support (1);
On interchange post insulator (2), AC terminal (17) and fixed contact (3) are installed, AC terminal is connected with fixed contact (3);
Vertically arranged conduction disconnecting link (8) and direct current binding post (5) are installed on direct current post insulator (4), and above-mentioned conduction disconnecting link (8) is connected with direct current binding post (5);
The operating mechanism link (10) of conduction disconnecting link (8) is connected with conduction disconnecting link (8) by operation post insulator (18); Above-mentioned fixed contact (3) is arranged on conduction disconnecting link (8) top, and when conduction disconnecting link (8) closes a floodgate, the moving contact (20) of conduction disconnecting link (8) is connected with above-mentioned fixed contact (3).
2. isolating switch for direct-current ice melting as claimed in claim 1, is characterized in that, on interchange post insulator (2), grading ring (16) is installed; Fixed contact (3), AC terminal (17) and grading ring (16) are connected as a single entity.
3. isolating switch for direct-current ice melting as claimed in claim 1 or 2, is characterized in that, AC terminal (17) is mounted on the axis top that exchanges post insulator (2).
4. isolating switch for direct-current ice melting as claimed in claim 1, is characterized in that, what described conduction disconnecting link (8) adopted is the conduction disconnecting link of the vertical open type isolating switch of single-arm vertical retractable isolating switch, both arms vertical-telescopic isolating switch or single armed.
5. isolating switch for direct-current ice melting as claimed in claim 1, it is characterized in that, what described conduction disconnecting link (8) adopted is the structure of the conduction disconnecting link of the vertical open type isolating switch of electrodynamic type single-arm vertical retractable isolating switch, electrodynamic type both arms vertical-telescopic isolating switch or electrodynamic type single armed.
6. the isolating switch for direct-current ice melting as described in claim 4 or 5, is characterized in that, the conductive seat (12) of conduction disconnecting link (8) is arranged on direct current post insulator (4) and operation post insulator (18).
7. isolating switch for direct-current ice melting as claimed in claim 1, it is characterized in that, at isolating switch support (1), base (9) is installed, exchanges post insulator (2), direct current post insulator (4) and operation post insulator (18) and be arranged on base (9); Operating mechanism link (10) is connected with the link gear in conductive seat (12) by operation post insulator (18).
8. isolating switch for direct-current ice melting as claimed in claim 1, is characterized in that, the length of described interchange post insulator (2) is greater than direct current post insulator (4) and operation post insulator (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110242809.1A CN102426963B (en) | 2011-08-23 | 2011-08-23 | Direct-current ice-melting isolating switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110242809.1A CN102426963B (en) | 2011-08-23 | 2011-08-23 | Direct-current ice-melting isolating switch |
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| Publication Number | Publication Date |
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| CN102426963A CN102426963A (en) | 2012-04-25 |
| CN102426963B true CN102426963B (en) | 2014-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110242809.1A Active CN102426963B (en) | 2011-08-23 | 2011-08-23 | Direct-current ice-melting isolating switch |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103021719A (en) * | 2012-12-03 | 2013-04-03 | 江苏省如高高压电器有限公司 | Ice-melting isolating switch |
| CN104252990B (en) * | 2013-05-29 | 2017-09-01 | 国家电网公司 | A kind of HVDC earthed switch and its static contact component |
| CN108336688B (en) * | 2018-04-23 | 2023-11-14 | 贵州电网有限责任公司 | Mobile direct-current ice melting horizontal access device |
| CN113192789B (en) * | 2021-03-24 | 2023-05-12 | 天津平高智能电气有限公司 | Column isolating switch and wiring terminal thereof |
| CN115565807B (en) * | 2022-10-25 | 2023-10-27 | 山东泰开隔离开关有限公司 | Duplex position ice-melt isolator that possesses from ice-melt function |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1563884B2 (en) * | 1965-12-14 | 1970-09-10 | Vyzkumny ustav energeticky, Prag | Protective device for switching off a consumer for high and maximum voltages located in a network with a rapid reclosing protection device |
| CN100420112C (en) * | 2006-03-22 | 2008-09-17 | 国家电网公司 | Line ice-melting method for extra-high voltage DC electric transmission system |
| CN201163714Y (en) * | 2008-03-12 | 2008-12-10 | 鞍山丰源电器有限公司 | Intelligent ice melting device of power system |
| CN101567542B (en) * | 2009-03-23 | 2011-04-20 | 浙江省电力设计院 | Monopole mobile bus connector |
| CN202178194U (en) * | 2011-08-23 | 2012-03-28 | 四川电力设计咨询有限责任公司 | Isolating switch for direct-current ice melting |
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2011
- 2011-08-23 CN CN201110242809.1A patent/CN102426963B/en active Active
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| CN102426963A (en) | 2012-04-25 |
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