CN105846415A - Extra-high-voltage transformer station optical cable terminal voltage-limiting apparatus - Google Patents

Abstract

A voltage limiting device for an optical cable terminal in an UHV substation, including a voltage limiter. Column connection, the upper end of the insulating spacer column is connected to the lower cover of the cable, the lower end of the insulating spacer plate is connected to the extension column, and the lower end of the extension column is connected to the hoop. The present invention is a voltage limiting device for optical cable terminals in UHV substations, which improves the safe operation rate of OPGW terminal downcomers in 1000KV UHV substations, eliminates equipment hidden dangers in the operation of OPGW optical cable lines, reduces power outage maintenance operations, and promotes the safe operation rate of UHV power grids , reduce the operation and maintenance cost of power grid enterprises.

Description

A voltage limiting device for optical cable terminals in UHV substations

technical field

The invention relates to a voltage limiting device for an optical cable terminal of an ultra-high voltage substation, and relates to the technical field of installation of an OPGW terminal of an ultra-high voltage substation.

Background technique

At present, the domestic power system 1000KV UHV substation OPGW terminal downcomer does not have a pressure limiting device for the rod. The OPGW in operation is subjected to a high induced voltage in a strong electric field environment, which may easily cause the discharge of the downcomer to the rod. The problem of broken strands of the down-conductor cable requires power outage for maintenance after the fault occurs, which affects the safe operation of the UHV power grid.

Contents of the invention

In order to solve the above technical problems, the present invention provides a voltage limiting device for optical cable terminals in UHV substations, which improves the safe operation rate of OPGW terminal downcomers in 1000KV UHV substations, eliminates equipment hidden dangers in the operation of OPGW optical cable lines, and reduces power outage maintenance operations. Promote the safe operation rate of UHV power grids and reduce the operation and maintenance costs of power grid enterprises.

The technical scheme adopted in the present invention is:

A voltage limiting device for an optical cable terminal in an UHV substation, including a voltage limiter. Column connection, the upper end of the insulating spacer plate is connected to the lower cover of the cable, the lower end of the insulating spacer plate is connected to the extension column, and the lower end of the extension column is connected to the hoop.

The two ends of the pressure limiter are fastened and connected to the upper connection plate and the lower connection plate through the upper fastening bolt and the lower fastening bolt respectively.

The cable pressing upper cover and the cable pressing lower cover are connected by fastening bolts of down-conducting cables.

The hoop includes an upper semi-circular hoop and a lower semi-circular hoop, the upper semi-circular hoop is fixedly connected to the lower end of the extension column, one side of the upper semi-circular hoop and the lower semi-circular hoop are movably connected by a hinge, and the other side is fixedly connected by a hoop fastening bolt .

The upper connection plate is connected with the upper cover of the pressure cable and made into one body.

The connecting plate at the lower end is connected with the extension column and made into one body.

The lower end of the insulating spacer column is connected with the extension column and made into one body.

A voltage limiting device for an optical cable terminal in an UHV substation, the voltage limiter and the fasteners of the downcomer are integrally manufactured.

A voltage limiting device for an optical cable terminal in an UHV substation, which is used in the installation of an OPGW terminal downconductor cable.

The present invention is a UHV substation optical cable terminal pressure limiting device, which has the advantages of:

1) The integrated process of the pressure limiting device and the downcomer fasteners effectively solves the problem of strand breakage of the downcomer caused by the discharge of the downcomer to the rod body.

2) Using the integrated process components of the pressure limiter and the downcomer fasteners reduces the time for assembly work and work time on the pole, improves the efficiency of on-site installation work, and ensures safe, convenient and reliable operation.

3) Improve the safe operation rate of the substation OPGW terminal downconductor cable, and promote the safe operation of the UHV power grid.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

detailed description

As shown in Figure 1, a voltage limiting device for an optical cable terminal in an UHV substation includes a voltage limiter 2. The cable upper cover 12 is connected, the lower connecting plate 3 is connected with the extension column 10, the upper end of the insulation spacer column 4 is connected with the lower cover 9 of the cable, the lower end of the insulation spacer column 4 is connected with the extension column 10, and the lower end of the extension column 10 is connected with the hoop 6.

The two ends of the pressure limiter 2 are fastened to the upper connection plate 1 and the lower connection plate 3 through the upper fastening bolt 8 and the lower fastening bolt 8' respectively.

The cable pressing upper cover 12 and the cable pressing lower cover 9 are connected by fastening bolts 5 of down-conducting cables. The cable pressing upper cover 12 and the cable pressing lower cover 9 are used for fastening the downcomer.

The hoop 6 includes an upper half-round hoop and a lower half-round hoop, the upper half-round hoop is fixedly connected to the lower end of the extension column 10, one side of the upper half-round hoop and the lower half-round hoop are movably connected by a hinge 11, and the other side is fastened by a hoop Bolt 7 is fixedly connected.

After the OPGW enters the gantry frame, it is installed on the upper part of the gantry frame bar with the hoop 6, and the OPGW cable is guided down and fastened for installation.

The effect of the extension column 10 is to ensure the insulation spacing between the downcomer and the gantry frame rod.

The insulation spacer column 4 is to ensure the insulation distance to support the installation of the voltage limiter.

The upper connecting plate 1 is connected with the pressure cable upper cover 12 and made into one body.

The lower connecting plate 3 is connected with the elongated column 10 and made into one body.

The lower end of the insulating spacer column 4 is connected with the extension column 10 and made into one body.

The upper connection plate 1 and the lower connection plate 3 are made of aluminum alloy material, and the elongated column and the hoop adopt aluminum alloy material. The use of aluminum hoop is mainly to reduce the contact galvanic corrosion effect between the hoop and the rod body, thereby reducing the contact resistance of the hoop to the rod body.

In the field application of the project, the assembled integrated pressure limiting device will be installed on the upper part of the portal frame pole of the substation at the pole body 1 meter away from the tension clamp after the OPGW enters the station, and then the OPGW cable will be led down. Put it into the cable pressing upper cover 12 and the cable pressing lower cover 9 grooves, and tighten the cable fastening bolt 5 of the down lead.

Claims (9)

1. a ultra-high voltage transformer station optical fiber cable termination pressure limiting device, including voltage limiter (2), it is characterized in that, voltage limiter (2) two ends connect upper end line connection board (1), lower end line connection board (3) respectively, upper end line connection board (1) is connected with pressure cable upper cover (12), and lower end line connection board (3) is connected with adding long column (10), and insulation gap plate (4) upper end connects pressure cable lower cover (9), insulation gap plate (4) lower end connects and adds long column (10), adds long column (10) lower end and connects anchor ear (6).

A kind of ultra-high voltage transformer station optical fiber cable termination pressure limiting device, it is characterized in that, described voltage limiter (2) two ends are fastenedly connected with upper end line connection board (1), lower end line connection board (3) by upper fastening bolt (8), lower fastening bolt (8 ') respectively.

A kind of ultra-high voltage transformer station optical fiber cable termination pressure limiting device, it is characterised in that described pressure cable upper cover (12), pressure cable lower cover (9) are connected by downlead cable fastening bolt (5).

A kind of ultra-high voltage transformer station optical fiber cable termination pressure limiting device, it is characterized in that, described anchor ear (6) includes upper half circular boop, lower half circular boop, upper half circular boop with add that long column (10) lower end is fixing to be connected, described upper half circular boop, lower half circular boop side are flexibly connected by hinge (11), and opposite side connects by anchor ear fastening bolt (7) is fixing.

A kind of ultra-high voltage transformer station optical fiber cable termination pressure limiting device, it is characterised in that described upper end line connection board (1) is connected with pressure cable upper cover (12) and is fabricated to integrally.

A kind of ultra-high voltage transformer station optical fiber cable termination pressure limiting device, it is characterised in that described lower end line connection board (3) with add long column (10) and be connected and be fabricated to integrally.

A kind of ultra-high voltage transformer station optical fiber cable termination pressure limiting device, it is characterised in that described insulation gap plate (4) lower end with add long column (10) and be connected and be fabricated to integrally.

8. a ultra-high voltage transformer station optical fiber cable termination pressure limiting device, it is characterised in that voltage limiter (2) is integrated with the securing member drawing lower cable to be made.

9. any one ultra-high voltage transformer station optical fiber cable termination pressure limiting device as described in claim 1 ~ 7, it is characterised in that draw the application during lower cable is installed in OPGW terminal.