CN203659725U - Combined-type disconnecting switch of direct-current deicing type - Google Patents
Combined-type disconnecting switch of direct-current deicing type Download PDFInfo
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- CN203659725U CN203659725U CN201320831966.0U CN201320831966U CN203659725U CN 203659725 U CN203659725 U CN 203659725U CN 201320831966 U CN201320831966 U CN 201320831966U CN 203659725 U CN203659725 U CN 203659725U
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Abstract
The utility model discloses a combined-type disconnecting switch of a direct-current deicing type, and the disconnecting switch comprises a supporting column. The upper part of the supporting column is provided with a voltage transformer through a direct-current supporting-column insulator. The top of the voltage transformer is provided with a grading ring. The supporting column is also provided with a conductive disconnecting link. The lower end face of the grading ring is provided with a static contact which cooperates with the conductive disconnecting link. The combined-type disconnecting switch, which employs the above technical scheme, irons out the defects that a manual temporary connection method is high in labor intensity, is great in operation difficulty, is long in time of power failure, and is not suitable for a power transmission line which needs frequent deicing. The disconnecting switch also irons out that a common isolated-connection method increases the occupation of spaces or needs an additional space. The combined-type disconnecting switch is simple and convenient in connection method, is suitable for multi-pass operations, is high in work efficiency, does not increase the occupation of spaces, does not need an additional space after being used in a built substation, and is high in values of popularization and application.
Description
Technical field
The utility model relates to a kind of DC ice melting combined type isolation switch.
Background technology
2007 with winter of 2008, in south China area, comprise that large-area powerline ice-covering disaster has occurred province's electrical networks such as Hubei, Jiangxi, Zhejiang, Hunan, Guizhou.Transmission line wire, insulator and steel tower icing, cause insulator arc-over tripping operation, and wire bears a heavy burden to be increased greatly, can cause conductor to open circuit even to fall tower, and transmission line is done great damage.Accident transmission line is many occurs in again winter in mountain area, and highway freezes, and ice and snow is sealed a mountain pass, and impaired transmission line extremely difficult reparation causes long-time power failure.The condition that in fact causes transmission line and steel tower icing is exactly " glaze " being called in meteorology, and it is comparatively common that China can produce the meteorological condition of " glaze ", especially mountain area.Therefore it is comparatively serious in China that powerline ice-covering causes circuit infringement.
In order to prevent that powerline ice-covering from causing disaster, many designing institutees of China have all carried out the research of line ice-melting technology, and the technology of employing is DC great current deicing substantially.According to the transformer of different voltages and transmission line, the direct voltage of employing is 20 ~ 35 kV, electric current 1000 ~ 4000A.While specifically enforcement, using main transformer low-pressure side as power supply, AC power is rectified into direct current in transformer station, then direct current is accessed.Need the transmission line after ice-melt three-phase shortcircuit, ice coating wire loaded as ice-melt, by larger electric current by conductor temp .-elevating, thereby reach the effect of melting the icing on transmission line conductor.Fig. 1 is the fundamental diagram of 500 kV transformer station 500 kV ice-melting device for transmission lines.In figure, circuit I1 connects 500kV transmission line, and circuit II2 is connected to power transformation station equipment.
In the time that transmission line is normally worked, DC de-icing device should not worked, and ice-melt DC loop should disconnect with transmission line, and ice-melt DC loop and transmission line are connected in DC de-icing device work in the time that transmission line needs ice-melt.
In Practical Project, the method for DC ice melting loop access transmission line is mainly following two classes: a, the artificial interim b of connection, isolating switch connects.
The transformer station that realizes at present DC loop access transmission line is divided into again two kinds of situation: a, on built power distribution equipment, adds DC ice melting loop; B, in new construction consider design DC ice melting loop.Here study as an example of 500 kV circuits of the 500 kV transformer stations that build example.Fig. 2 is the section layout plan of 500 kV transmission line circuits, and the access in DC ice melting loop need be carried out on this basis.Circuit I connects 500kV transmission line, and circuit II is connected to power transformation station equipment, and 500 kV transmission line circuits are arranged in former enclosure wall 3.
Artificial method of attachment is temporarily by artificial interim mode of installing, and directly with cross-over connection wire, transmission line is accessed in DC ice melting loop, as shown in Figure 3, now needs to increase enlarging enclosure wall 4.This method of attachment, floor space is little, it is little to invest, but because high voltage substation outlet structure is high, adopts patch method inefficiency, intensity of workers and operating risk is high, the time is long.
Adopt isolating switch that DC ice melting loop is connected into transmission line, generally adopt the isolating switch of level fracture, as shown in Figure 4.Common isolating switch method of attachment shown in figure is newly-increased one group of 500 kV double-column horizontal open-type isolating switch between ice-melt DC bus and high-voltage terminal circuit, one termination DC ice melting bus of this isolating switch, the other end is connected with high-tension line, and between former enclosure wall 3 and enlarging enclosure wall 4.Due to newly added equipment, enclosure wall need extend out, and floor space increases, and need newly take over the land for use, and long construction period, invests high.
In order to save occupation of land, develop recently a kind of novel isolating switch that is exclusively used in ice-melt loop, be the isolating switch of vertical-fracture.This kind of isolating switch, in conjunction with DC ice melting technology wiring feature, merged the function of high voltage isolator, low voltage isolation switch and earthed switch.Conduction disconnecting link in isolating switch for direct-current ice melting adopts the common single-arm vertical retractable isolating switch structure of power industry.It accesses transmission line as Fig. 5 by DC ice melting loop.This kind of isolating switch 5 adopts vertical-fracture to reduce and exchanges the horizontal range between post insulator and direct current post insulator, can setting be installed in narrow and small place, save cost of investment, reduced transformer station because place expands the impact that is subject to surrounding terrain, environment.But it still needs to extend enclosure wall 4.
From upper surface analysis, artificial interim access scheme, although invest littlely, because high-voltage terminal is very high, installs and removes DC ice melting link circuit workload very large temporarily, and will employ crane longevity of service.The situation that produces once in a while line ice coating for minimum circuit still can be dealt with, and just is relatively difficult to tackle for the more DC ice-melting that need to adopt.For two kinds of isolating switch connection schemes, all to increase occupation of land, increase and take up an area and can realize for new construction, need to outside transmission line outlet enclosure wall, again take over the land for use for built transformer station, realize very difficult.
Summary of the invention
The purpose of this utility model is to provide a kind of simple and convenient, DC ice melting combined type isolation switch of not increasing occupation of land.
For achieving the above object, the utility model is by the following technical solutions:
A kind of DC ice melting combined type isolation switch, it comprises pillar, and pillar top arranges voltage transformer by direct current post insulator, and voltage transformer top arranges grading ring, on described pillar, be also provided with conduction disconnecting link, and in the lower surface of grading ring, the fixed contact coordinating with conduction disconnecting link be set.
Setting operation post insulator on described pillar, operation post insulator end is connected with motor-operating mechanism.
Adopt the utility model of technique scheme, adopt combined type isolation switch to overcome that artificial interim method of attachment labour intensity is large, task difficulty is large, interruption duration is long, more frequently need the shortcoming that should not adopt in the transmission line of ice-melt.Also overcome and adopted common isolation method of attachment, need to increase and take up an area simultaneously, or newly-increased shortcoming of taking up an area.Adopt combined type isolation switch, method of attachment is simple and convenient, suitable multi-pass operation, and operating efficiency is high, does not increase occupation of land simultaneously, uses in built transformer station, does not need again to take over the land for use, and has popularizing value.
Brief description of the drawings
Fig. 1 is the fundamental diagram of DC de-icing device.
Fig. 2 is 500kV transmission line circuit section layout plan.
Fig. 3 is the schematic diagram of artificial interim connection scheme.
Fig. 4 is the schematic diagram of common isolating switch connection scheme.
Fig. 5 is isolating switch for direct-current ice melting connection diagram.
Fig. 6 is the front view of the utility model combined type isolation switch "on" position.
Fig. 7 is the right view of the utility model combined type isolation switch "on" position.
Fig. 8 is the front view of the utility model combined type isolation switch gate-dividing state.
Fig. 9 is the right view of the utility model combined type isolation switch gate-dividing state.
Figure 10 is the utility model combination isolating switch connection scheme figure.
Embodiment
As shown in Fig. 6-9, a kind of DC ice melting combined type isolation switch 19, it comprises pillar 18, pillar 18 tops arrange voltage transformer 11 by direct current post insulator 15, voltage transformer top arranges grading ring 13, the utility model is also also provided with conduction disconnecting link 12 on pillar 18, and in the lower surface of grading ring 13, the fixed contact 14 coordinating with conduction disconnecting link 12 is set.
Setting operation post insulator 16 on pillar 18, operation post insulator 16 ends are connected with motor-operating mechanism 17.
Principle of the present utility model is: adopt DC ice melting combined type isolation switch, this isolating switch is to combine with the voltage transformer of transmission line circuit, isolating switch adopts single-arm vertical fracture, roughly the same, difference is to replace direct current post insulator with voltage transformer to the ice-melt isolating switch of form and vertical-fracture.
The layout of combined type isolation switch access transmission line as shown in figure 10.Ice-melt combined type isolation switch 19 connects DC bus 20 while operation.Open when transmission line normally moves ice-melt combined type isolation switch 19, in the time of powerline ice-covering, transmission line stop transport, ice-melt combined type isolation switch 19 close connect DC ice melting loop get final product ice-melt.
As above the layout plan of ice-melt combined type isolation switch is visible in addition, and new construction adopts combined type isolation switch not increase occupation of land, and the built engineered new expropriation of land that also do not need, completely in the interior construction of former enclosure wall 3.
Claims (2)
1. a DC ice melting combined type isolation switch, it comprises pillar (18), pillar (18) top arranges voltage transformer (11) by direct current post insulator (15), voltage transformer top arranges grading ring (13), it is characterized in that: on described pillar (18), be also provided with conduction disconnecting link (12), and in the lower surface of grading ring (13), the fixed contact (14) coordinating with conduction disconnecting link (12) be set.
2. DC ice melting combined type isolation switch according to claim 1, is characterized in that: at the upper setting operation post insulator (16) of described pillar (18), operation post insulator (16) end is connected with motor-operating mechanism (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320831966.0U CN203659725U (en) | 2013-12-17 | 2013-12-17 | Combined-type disconnecting switch of direct-current deicing type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320831966.0U CN203659725U (en) | 2013-12-17 | 2013-12-17 | Combined-type disconnecting switch of direct-current deicing type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203659725U true CN203659725U (en) | 2014-06-18 |
Family
ID=50926087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320831966.0U Expired - Fee Related CN203659725U (en) | 2013-12-17 | 2013-12-17 | Combined-type disconnecting switch of direct-current deicing type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203659725U (en) |
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2013
- 2013-12-17 CN CN201320831966.0U patent/CN203659725U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20161217 |