JP2009268283A - Movement gas insulated switching device and its local operating method - Google Patents

Abstract

[PROBLEMS] To provide a mobile GIS that can be manufactured by mounting each device within a height limit of transportation regulation on a bogie frame and that can be used with a sufficient insulation distance of a bushing after transportation to the site, and its operation method. provide.
A plurality of lifting means 4 are provided on a carriage frame 2 that is pulled and moved by a transport vehicle 1, and a rotary table 5 is rotatably attached to the upper surface of the carriage frame 2. The phase separation type GIS 10 to be mounted on the upper surface of the rotary table 5 is electrically connected to a phase separation type horizontal circuit breaker CB installed in parallel with the traveling direction of the carriage frame 10 and one connection port of each circuit breaker CB. The disconnecting device DS connected in series, the connecting bus BS provided before and after the traveling direction of the carriage frame 2 serving as the other connection port of the circuit breaker CB and the disconnecting device DS, and the bushing Bg attached to each connecting bus BS before and after It comprises. And among each bushing Bg, the one located in the center is attached substantially horizontally, and the ones located on both sides are attached inclined at a predetermined angle downward.
[Selection] Figure 1

Description

  The present invention relates to a mobile gas insulated switchgear and a field operation method thereof, and more particularly to a mobile gas insulated switchgear used by mounting a substation device on a carriage frame of a transport vehicle such as a truck or a trailer and the field operation thereof. Regarding the method.

  In general, when a substation installed in a power station becomes unavailable due to a disaster such as an earthquake or a lightning strike, transport the mobile substation that is prepared for emergency use to the disaster site where it is needed. Then, necessary measures such as connection using a power transmission / distribution line and a cable are taken to restore the power system.

  A conventional moving facility is an oil-insulated or gas-insulated transformer, which is a substation facility, and a gas-insulated switchgear (hereinafter abbreviated as “GIS”) on a bogie frame that is towed and moved by a transport vehicle. Are placed in consideration of these arrangements and directly connected to form a substation for movement, and it has been proposed to use the substation as it is (see Patent Document 1).

  The mobile substation can be used as a substitute for a small-scale substation, but if the higher voltage and capacity are further increased, the overall size becomes remarkably large, resulting in a problem that it cannot be manufactured. In order to improve this, it is also conceivable that the transformer part and the GIS part are separately mounted on separate carriage frames, and these are pulled by separate transport vehicles and used in combination after on-site transportation.

  By the way, as shown in the single line connection diagram of FIG. 3, the GIS part is a disconnect switch DS in which a ground switch ES is arranged at one end of a circuit breaker CB having current transformers CT at both ends of the break point. Are electrically connected in series. And it is the arrangement configuration of each equipment which attaches the bushing Bg used as a lead-in terminal to the connection bus BS on the other end side of the circuit breaker CB and the disconnecting switch DS of these series connection configurations, compared with the transformer part. The structure is complicated.

JP 11-215625 A

  GIS designs and manufactures each device to be installed on the premise that it is installed and used in a power substation. Therefore, the width and height of each device constituting the GIS has a structure that is installed on an installation base surface with few dimensional restrictions.

  For this reason, if the GIS of the type installed on the installation base surface is mounted on the bogie frame as it is with each normal device to configure the moving GIS, the transport regulation dimensions, In particular, since it becomes difficult to mount in terms of height, what can be manufactured is limited to a small moving GIS with a low voltage.

  Therefore, in order to properly arrange the devices constituting the GIS for higher voltage on the carriage frame to constitute the moving GIS, the devices are arranged and mounted within the dimensions of the transportation regulation, In addition, it is necessary to manufacture a moving GIS in consideration of use.

  In addition, depending on the operating environment and the rating of the device, there is a case where the pull-in method from the transmission / transformation system to the GIS has to be changed from the cable to the bushing. For this reason, in order to construct a moving GIS that is subject to transportation regulations using a long bushing, there are further problems that it is difficult to manufacture, and that it is not easy to perform safety management during transportation or obtaining permission.

  The object of the present invention is to manufacture a high-voltage moving GIS using a bushing by mounting each device within the height limit of transportation regulation on the bogie frame, and can be easily transported to the site where it is used. The purpose of the present invention is to provide a mobile GIS that can be used with a sufficient insulation distance after transportation, and a method for its on-site operation.

  The moving GIS of the present invention is provided with a plurality of elevating means on a cart frame that is towed and moved by a transport vehicle, and a rotary table is rotatably attached to the upper surface of the cart frame. A phase-separated horizontal circuit breaker installed parallel to the traveling direction of the carriage frame, a disconnector electrically connected in series to one connection port of each circuit breaker, and the other connection port of the circuit breaker and disconnector Each of the bushings is configured by mounting a phase-separated gas-insulated switchgear having connection buses provided respectively in front and behind the traveling direction of the bogie frame and the bushings attached to the front and rear connection buses. Among them, the bushing located at the center is attached substantially horizontally, and the bushings located on both sides are attached inclined at a predetermined angle downward.

  Preferably, each of the bushings is constructed using a polymer resin soot tube.

  Further, the field operation method of the gas insulated switchgear for movement according to the present invention includes a plurality of lifting means provided on a movable carriage frame, a rotary table rotatably attached to the upper surface of the carriage frame, and the carriage on the rotary table. A phase-separated gas-insulated switchgear is placed in parallel with the traveling direction of the frame, and the gas-insulated switchgear is a bushing located at the center of the bushings attached to the connecting buses provided before and after the traveling direction of the carriage frame. Is mounted almost horizontally, and the bushings located on both sides are transported to the site in a state where they are tilted downward at a predetermined angle, and the carriage frame is raised to a predetermined height and fixed by the lifting means at the place of use. After that, the rotary table is rotated to rotate the gas insulated switchgear until it is substantially perpendicular to the carriage frame, and the bushings are connected to the cable. It is characterized in that it can start operating by.

  According to the present invention, a rotatable rotating table is provided on a carriage frame having a plurality of lifting means, and a high voltage GIS using a bushing is mounted on the rotating table, so that a larger moving object can be used. GIS can be easily manufactured.

  Moreover, the moving GIS is transported within the dimensions that are not subject to transportation regulations, and the carriage frame is lifted by the lifting means at the place of use, and the entire GIS on the rotary table is rotated to ensure the insulation distance of the bushing. Thus, the mobile GIS can be operated without any trouble.

  The moving GIS of the present invention is provided with a plurality of lifting means on a carriage frame that is towed and moved by a transport vehicle, and a rotary table is rotatably attached to the upper surface of the carriage frame, and a phase separation type is provided on the upper surface of the rotary table. Of GIS. The phase separation type GIS includes a phase separation type horizontal circuit breaker installed in parallel with the traveling direction of the carriage frame, a disconnection device electrically connected in series to one connection port of each circuit breaker, and the circuit breaker and the disconnection device. The connecting bus provided before and after the traveling direction of the bogie frame serving as the other connecting port of the vehicle, and the bushings attached to the front and rear connecting buses, respectively. Of the bushings, the bushing located at the center is attached substantially horizontally, and the bushings located on both sides are attached inclined at a predetermined angle downward.

  In the moving GIS of the present invention, the carriage frame is moved to the site to be used by the carriage frame, and then the carriage frame is raised and fixed to a predetermined height by the lifting means at the place of use, and then the rotary table is rotated. The gas insulated switchgear is rotated until it is substantially perpendicular to the bogie frame, and each bushing is connected to a cable to start operation.

  Hereinafter, the moving GIS of the present invention will be described with reference to the embodiment shown in FIG. A truck frame 2 is detachably connected to a trailer or other transport vehicle 1 at a portion of the traction connection portion 3. The movable bogie frame 2 is electrically or mechanically disconnected from the transport vehicle 1 as necessary at the site or the like.

A lift frame 4 such as a plurality of hydraulic jacks is attached to both sides of the carriage frame 2, and a turntable 5 is attached to the center of the upper surface. On the upper surface of the turntable 5 is mounted a phase separation type GIS 10 in which a non-flammable insulating gas such as SF ₆ gas is sealed, and the moving GIS is configured so as to be reduced in size and weight. When used on site, the GIS 10 is rotated with the rotary table 5 and used.

  A horizontal breaker CB for three phases, which is a main component constituting the phase separation type GIS 10, is installed on the upper surface of the rotary table 5 so as to be parallel to the traveling direction of the carriage frame 2. Further, a disconnecting device DS that is electrically connected in series is provided at one connection port of the horizontal circuit breaker CB. The horizontal breaker CB and the disconnecting switch DS are provided on the rotary table 5 using a support frame or the like so that the GIS 10 can be used as it is without being damaged when transported in a state where the GIS 10 is placed on the rotary table 5 of the carriage frame 2. Place on the top surface of and fix.

  The horizontal breaker CB for each phase is provided with a connection bus BS at the other connection port so as to protrude forward in the direction of travel of the carriage frame 2, and the disconnector DS for each phase is also the same. A connecting bus BS is provided at the connecting port so as to protrude rearward in the direction opposite to the traveling direction of the carriage frame 2.

  Then, in consideration of transporting the GIS with the bogie frame 2 and operation in the field, bushings Bg are attached to the front and rear connection buses BS, respectively. That is, among the bushings Bg of each phase, the bushing Bg located in the center in both the front and rear is mounted substantially horizontally on the connection bus BS, and as shown in FIG. It is set so as to be within the dimension T.

  Similarly, the bushings Bg located on both sides in the front-rear direction are attached to a connection bus BS whose attachment surface is inclined downward by a predetermined angle so as to extend to the ground side. As a result, the bushings Bg on both sides are accommodated within the transport limit width dimension W as shown in FIG. 1B, and an insulation distance from the bushings Bg of the adjacent phases is secured so that they can be used without any trouble.

  As the bushing Bg of each phase attached to the front and rear connection buses BS, a polymer resin soot pipe can be adopted instead of the porcelain soot pipe. The bushing Bg using the polymer resin soot pipe significantly improves the earthquake resistance and the explosion-proof property, so that no problem occurs even if the bushing Bg is transported while being attached to the connection bus BS.

  Next, a field operation method for transporting and using the mobile gas insulated switchgear according to the present invention to the site will be described. As described above, the GIS 10 placed on the upper surface of the turntable 5 provided on the carriage frame 2 is pulled by the transport vehicle 1 in an emergency and transported to the site where the disaster occurred.

  After arrival at the site, as shown in FIGS. 2A and 2B, the lifting means 4 provided on the carriage frame 2 is operated as shown in FIGS. 2A and 2B, and the bushing Bg that has been insufficient to fit within the transport restricted height dimension. The carriage frame 2 is raised and fixed to a predetermined height dimension so that the ground insulation distance can be sufficiently secured.

  Thereafter, as shown by the arrows, the GIS 10 together with the turntable 5 is rotated to a state substantially perpendicular to the carriage frame 1, and the cables connected to the power system are connected to the bushings Bg, and other necessary connections are made. The operation of GIS10 is started.

  In the operation of the GIS 10 described above, the lifting means 4 is operated to raise and fix the carriage frame 2, and then the GIS 10 is rotated together with the rotary table to a state substantially perpendicular to the carriage frame 1. When there is a possibility that the entire center of gravity rises due to the rise of the carriage frame 2 and becomes unstable, the following can be performed. In other words, after fixing at a predetermined place of use, the GIS 10 is rotated together with the rotary table to a substantially right angle with respect to the carriage frame 1 and then the lifting means 4 is operated to raise the carriage frame 2 and the entire GIS 10. Can be made.

(A) is the front view which shows the gas insulated switchgear for movement which is one Example of this invention, (b) is the side view which looked at (a) from back. (A) is a top view which shows the use condition of the gas insulated switchgear for movement of this invention, (b) is a side view. It is a single wire connection diagram of a gas insulated switchgear.

Explanation of symbols

  2 ... bogie frame, 4 ... elevating means, 5 ... rotary table, 10 ... gas insulated switchgear, CB ... breaker, DS ... disconnector, BS ... connecting bus, Bg ... bushing.

Claims (3)

  A movable gas insulated switchgear having a gas insulated switchgear mounted on a movable carriage frame, wherein the carriage frame is provided with a plurality of lifting means, and a rotary table is rotatably attached to the upper surface of the carriage frame. A phase-separated horizontal circuit breaker installed on the upper surface of the rotary table in parallel with the traveling direction of the carriage frame; a disconnector electrically connected in series to one connection port of each circuit breaker; and the circuit breaker. A phase-separated gas-insulated switchgear having connection buses provided respectively in front and rear of the traveling direction of the bogie frame to be the other connection port of the separator and disconnector and bushings attached to the front and rear connection buses is mounted. The bushing located at the center of each of the bushings is mounted substantially horizontally, and the bushings positioned on both sides are mounted inclined at a predetermined angle downward. Use gas-insulated switchgear.   2. The gas insulated switchgear for movement according to claim 1, wherein each of the bushings is configured using a polymer resin soot tube.   A movable carriage frame is provided with a plurality of lifting means, and a rotary table is rotatably attached to the upper surface of the carriage frame, and a phase-separated gas insulated switchgear is mounted on the rotary table in parallel with the traveling direction of the carriage frame. The gas-insulated switchgear includes bushings attached to the connecting buses provided in the front and rear of the carriage frame in the traveling direction, the bushings located in the center are attached substantially horizontally, and the bushings located on both sides are predetermined downward. After being transported to the site in an inclined state and attached, the carriage frame is raised and fixed to a predetermined height by the lifting means at the place of use, and then the rotary table is rotated to provide the gas insulated switchgear. Rotating to a state that is substantially perpendicular to the carriage frame, connecting each bushing to a cable and starting the operation Local operation method of the location.

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