CN102426963A - Direct-current ice-melting isolating switch - Google Patents
Direct-current ice-melting isolating switch Download PDFInfo
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- CN102426963A CN102426963A CN2011102428091A CN201110242809A CN102426963A CN 102426963 A CN102426963 A CN 102426963A CN 2011102428091 A CN2011102428091 A CN 2011102428091A CN 201110242809 A CN201110242809 A CN 201110242809A CN 102426963 A CN102426963 A CN 102426963A
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- isolating switch
- disconnecting link
- post insulator
- direct current
- insulator
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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 inserted the isolating switch of ultra-high-tension power transmission line.
Background technology
Icing is a kind of natural calamity of serious threat power system safety and stability operation under the freezing in the winter time sleety weather of transmission line.Owing to increased the icing load on the lead, all can bring certain mechanical failure to lead, iron tower and gold utensil, can break, fall shaft tower when icing is serious, cause large area blackout; Continuous development along with power electronic technology; The heavy DC de-icing technology is widely used in the cross section transmission line ice-melt of different electric pressure different conductors; The principle of this method is as load with the icing circuit; Apply DC power supply, provide the direct-current short circuit electric current to come heating wires that the circuit icing is melted with low voltage.The heavy DC ice-melt needs direct current is inserted ultra-high-tension power transmission line, and conventional cut-in method has: artificial cross-over connection scheme, common isolating switch cross-over connection scheme, install schemes such as ice-melt pipe bus scheme, dolly cross-over connection scheme additional.
Artificial cross-over connection wire scheme is the mode of being installed by manual work, directly uses preprepared cross-over connection lead, and direct current is inserted ultra-high-tension power transmission line.This cross-over connection scheme though floor space is little, is invested for a short time, simple to operate, because the high voltage substation outlet structure is high, adopts interim cross-over connection scheme inefficiency, intensity of workers and operating risk high, and the transmission line interruption duration is long, the cost height.
Common isolating switch cross-over connection scheme is newly-increased one group of high pressure twin columns horizontally openable formula 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 big; Be unfavorable for being installed in the other narrow and small position of original lightning arrester; Generally need to install to open up the bigger place of relative area again, and be also need original leakage conductor be moved to newly-increased isolating switch line side simultaneously by the newly-increased isolating switch of protection; Therefore floor space increases, and investment is high.And, also need new expropriation of land, long construction period to the rebuilding construction engineering.
Installing ice-melt pipe bus scheme additional is to increase by two groups of ice-melt jumper pipe buses in transformer station's power distribution equipment outlet side; One group connects DC de-icing device DC tube bus; Another group connects ultra-high-tension power transmission line, connects two groups of pipe buses with hard bus during ice-melt, and direct current is inserted ultra-high-tension power transmission line.Though this kind scheme is invested the less outer expropriation of land that also do not need, it is female to use crane to connect the ice-melt jumper pipe during ice-melt, can't save time and human and material resources and financial resources; Under the more intense situation of freezing disaster, can't satisfy 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, and for satisfying being connected of cross-over connection dolly and circuit, needs the tube connector bus of installing special use simultaneously; What also need configure dedicated has an isolating switch function dolly, separate unit dolly 1,500,000, and every time outlet needs three dollies altogether during ice-melt; Amount to 4,500,000, therefore investment is big, and cost is high; Also need the construction in special garage parking simultaneously, and receive the influence of site environment, dolly complicated operation.
Summary of the invention
Technical problem to be solved by this invention provide a kind of simple to operate safe, take up an area of DC ice melting little, simple in structure, reduced investment and use isolating switch.
The DC ice melting isolating switch that the present invention adopted comprises the interchange post insulator, direct current post insulator and the operation post insulator that are installed on the isolating switch support; On the 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 the direct current post insulator, and above-mentioned conduction disconnecting link is connected with the direct current binding post; The operating mechanism link of conduction disconnecting link is connected with the conduction disconnecting link through the operation post insulator; Above-mentioned fixed contact is arranged on conduction disconnecting link top, and when the conduction disconnecting link closed a floodgate, the moving contact of conduction disconnecting link was connected with above-mentioned fixed contact.
On the 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 upright open type isolating switch of the vertical telescopic isolating switch of single armed, the vertical telescopic isolating switch of both arms or single armed.
What described conduction disconnecting link adopted is the structure of the upright open type isolating switch conduction of the vertical telescopic isolating switch of electrodynamic type single armed, the vertical telescopic isolating switch of electrodynamic type both arms or electrodynamic type single armed disconnecting link.
The conductive seat (12) of conduction disconnecting link is installed in the direct current post insulator and operates on the insulator.
At the isolating switch support base is installed, exchanges post insulator, direct current post insulator and operation post insulator and be installed on the base; Operating mechanism link links to each other with link gear in the conductive seat through the operation insulator.
The length of said interchange post insulator is greater than direct current post insulator and operation insulator.Adopt the present invention, can not need artificially to execute-in-place during ice-melt, dangerous when having avoided the operation of artificial interim cross-over connection lead and dolly and saving time and human and material resources and financial resources satisfied the effect of quick ice-melt; Adopt the present invention, expropriation of land outside in existing transformer station land used scope, not needing, floor space is little, practices thrift construction period, has also saved the soil cost; Simultaneously do not need equipment to have bad luck and park, therefore practiced thrift the place, and the invention equipment manufacturing cost is low, has also practiced thrift the equipment purchasing cost.
Description of drawings
Fig. 1 is the special-purpose isolating switch gate-dividing state of a DC ice melting sketch map.
Fig. 2 is the special-purpose isolating switch "on" position of a DC ice melting sketch map.
To be DC ice melting leave the gate-dividing state sketch map that pass and dc bus are connected with ultra-high-tension power transmission line at a distance from special use to Fig. 3.
Mark among the figure: 1-isolating switch support, 2-exchanges post insulator, 3-fixed contact, 4-direct current post insulator, 5-direct current binding post; 6-exchange to connect lead, and 7-dc bus support, 8-conduct electricity disconnecting link, 9-base, 10-operating mechanism link; The 11-operating mechanism, the 12-conductive seat, the 13-dc bus, the 14-direct current connects lead, 15-direct current post insulator; The 16-grading ring, 17-ac terminal, 18-operates insulator, 19-conducting rod, 20-moving contact.
Embodiment
The DC ice melting isolating switch comprises the base 9 that is installed on the isolating switch support 1, installs on the base 9 to exchange post insulator 2, direct current post insulator 4 and operation insulator 18.Ac terminal son 17 and fixed contact 3 are installed exchanging on the post insulator 2, 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 through 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.Exchange to connect the electric power that produces in lead 6 deadweights and the transmission of electricity process to exchanging the stressing influence of post insulator 2 in order reducing, ac terminal 17 to be 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 the discharge flashover, prevent to be burnt in post insulator full skirt surface because of the discharge flashover.Insulating requirements when interchange post insulator 2 need satisfy ac high-voltage work; And the requirement of 4 needs of direct current post insulator D.C. isolation when satisfying ice-melt; Therefore for practicing thrift cost and the setting height(from bottom) that reduces isolating switch, exchange the length of the length of post insulator 3 greater than direct current post insulator 5.
Embodiment
Below in conjunction with accompanying drawing the present invention is further specified.
Mesohigh power distribution equipment outlet side is installed DC ice melting isolating switch of the present invention and dc bus support 7 in transformer station.
On isolating switch support 1, be equipped with one group and exchange post insulator 2, grading ring 16 is installed in the upper end that exchanges post insulator 2.Fixed contact 3, ac terminal son 17 and grading ring 16 are connected as a single entity.This ac terminal 17 is realized linking to each other with transmission line through be connected lead 6 connections with interchange.
In the present embodiment, what conduction disconnecting link 8 adopted is the conduction disconnecting link structure of the vertical telescopic isolating switch of electric single arm, comprises conducting rod 19, conductive seat 12, operation insulator 18, operating mechanism link 10, operating mechanism 11.Isolating switch support 1 is provided with direct current post insulator 4 and operation insulator 18, and conductive seat 12 is installed on the direct current post insulator 4, and operating mechanism link 10 links to each other with link gear in the conductive seat 12 through operation insulator 18.Direct current binding post 5 just adopts the power supply terminal on the vertical telescopic isolating switch of this electric single arm.
Direct current post insulator 15 is installed on the dc bus support 7, and dc bus 13 is installed on the above-mentioned direct current post insulator 15, and the direct current binding post 5 on dc bus 13 and the vertical telescopic isolating switch of electric single arm is connected lead 14 through direct current and connects.
The operating state of the special-purpose isolating switch of DC ice melting comprises:
(1) normal ultra-high-tension power transmission line transmission course: the moving contact of the vertical telescopic isolating switch of electric single arm and fixed contact 3 are in gate-dividing state, exchange post insulator 2 and satisfy the ac high voltage insulating requirements.
(2) ice-melt state: when needs during to the high-tension line ice-melt; Elder generation's cutoff high power supply; Link gear through in motor-operating mechanism 11 control operation linkages 10, the conductive seat 12 makes the moving contact on the conducting rod 19 be connected with fixed contact 2; Conduction disconnecting link 8 just is in "on" position; The direct current that dc bus 13 provides connects direct current binding post 5, conductive seat 12, conducting rod 19, moving contact 20, fixed contact 3, ac terminal 17 on lead 14, the direct current post insulator 4 and exchanges through direct current and is connected lead 6 direct current is input on the high-voltage line, and between the three-phase high-voltage line, forms DC loop, makes ultra-high-tension power transmission line heating realization 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.
The conduction disconnecting link of the vertical telescopic isolating switch of electronic both arms, the upright open type isolating switch of electric single arm is compared with the conduction disconnecting link of the vertical telescopic isolating switch of electric single arm; The combined floodgate of conducting rod 19, separating brake motion mode and structure are different; But conductive seat 12, operation insulator 18, operating mechanism link 10, operating mechanism 11 can adopt same way as to be installed on the isolating switch support 1, can realize the purpose of inventing too.
Claims (8)
1. the DC ice melting isolating switch is characterized in that, comprises the interchange post insulator (2), direct current post insulator (4) and the operation post insulator (18) that are installed on the 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) through operation post insulator (18); Above-mentioned fixed contact (3) is arranged on conduction disconnecting link (8) top, and when conduction disconnecting link (8) closed a floodgate, the moving contact (20) of conduction disconnecting link (8) was connected with above-mentioned fixed contact (3).
2. DC ice melting isolating switch 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. according to claim 1 or claim 2 DC ice melting isolating switch is characterized in that, ac terminal (17) is mounted on the axis top that exchanges post insulator (2).
4. DC ice melting isolating switch as claimed in claim 1 is characterized in that, what described conduction disconnecting link (8) adopted is the conduction disconnecting link of the upright open type isolating switch of the vertical telescopic isolating switch of single armed, the vertical telescopic isolating switch of both arms or single armed.
5. DC ice melting isolating switch 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 upright open type isolating switch of the vertical telescopic isolating switch of electrodynamic type single armed, the vertical telescopic isolating switch of electrodynamic type both arms or electrodynamic type single armed.
6. like claim 4 or 5 described DC ice melting isolating switches, it is characterized in that the conductive seat (12) of conduction disconnecting link (8) is installed on direct current post insulator (4) and the operation insulator (18).
7. DC ice melting isolating switch as claimed in claim 1 is characterized in that, at isolating switch support (1) base (9) is installed, and exchanges post insulator (2), direct current post insulator (4) and operation post insulator (18) and is installed on the base (9); Operating mechanism link (10) links to each other with link gear in the conductive seat (12) through operation insulator (18).
8. DC ice melting isolating switch as claimed in claim 1 is characterized in that, the length of said interchange post insulator (2) is greater than direct current post insulator (4) and operation 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102426963A true CN102426963A (en) | 2012-04-25 |
| CN102426963B CN102426963B (en) | 2014-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110242809.1A Active CN102426963B (en) | 2011-08-23 | 2011-08-23 | Direct-current ice-melting isolating switch |
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| Country | Link |
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| CN (1) | CN102426963B (en) |
Cited By (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 |
| WO2014190906A1 (en) * | 2013-05-29 | 2014-12-04 | 国家电网公司 | High-voltage direct-current grounding switch and stationary contact component thereof |
| CN108336688A (en) * | 2018-04-23 | 2018-07-27 | 贵州电网有限责任公司 | A kind of horizontal access device of mobile DC ice melting |
| CN113192789A (en) * | 2021-03-24 | 2021-07-30 | 天津平高智能电气有限公司 | On-pole isolating switch and wiring terminal thereof |
| CN115565807A (en) * | 2022-10-25 | 2023-01-03 | 山东泰开隔离开关有限公司 | Double-station ice melting isolating switch with self-ice melting function |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1105419A (en) * | 1965-12-14 | 1968-03-06 | Vyzk Ustav Energeticky | Improved disconnecting switch arrangement for high voltage transformers |
| CN1848575A (en) * | 2006-03-22 | 2006-10-18 | 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 |
| CN101567542A (en) * | 2009-03-23 | 2009-10-28 | 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 |
-
2011
- 2011-08-23 CN CN201110242809.1A patent/CN102426963B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1105419A (en) * | 1965-12-14 | 1968-03-06 | Vyzk Ustav Energeticky | Improved disconnecting switch arrangement for high voltage transformers |
| CN1848575A (en) * | 2006-03-22 | 2006-10-18 | 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 |
| CN101567542A (en) * | 2009-03-23 | 2009-10-28 | 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 |
Cited By (7)
| 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 |
| WO2014190906A1 (en) * | 2013-05-29 | 2014-12-04 | 国家电网公司 | High-voltage direct-current grounding switch and stationary contact component thereof |
| CN108336688A (en) * | 2018-04-23 | 2018-07-27 | 贵州电网有限责任公司 | A kind of horizontal access device of mobile DC ice melting |
| 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 |
| CN113192789A (en) * | 2021-03-24 | 2021-07-30 | 天津平高智能电气有限公司 | On-pole isolating switch and wiring terminal thereof |
| CN115565807A (en) * | 2022-10-25 | 2023-01-03 | 山东泰开隔离开关有限公司 | Double-station ice melting isolating switch with self-ice melting function |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102426963B (en) | 2014-04-30 |
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