JP4891733B2 - Electrical equipment installation method and electrical equipment removal method - Google Patents

Description

  The present invention relates to an electrical equipment installation method and an electrical equipment removal method that do not require a safety blackout in an electrical facility having an overhead bus with an exposed charging portion.

  GIS (Gas Insulated Substation) that uses sulfur hexafluoride (SF6) gas, which has excellent insulation performance, in place of the previously established air-isolated power generation / substations that require a large site area GAS INSULATED SUBSTATION) and single-unit circuit breakers have been built. Such a GIS is composed of devices such as a circuit breaker (CB), a disconnector (DS), a current transformer (CT), an instrument transformer (PT), a lightning arrester (LA), and a bushing (BSG). . A gas-insulated electrical device, in which the charging part is housed in a metal container and sealed with a pressurized SF6 gas in its internal space, is combined and efficiently on the concrete frame constructed in the site. Is laid out and installed. Then, the large electric power sent through the power transmission line is received through the bushing, led to the transformer through the gas-insulated electrical equipment laid out in a complex manner, and transformed into predetermined power. The installation and removal of each electrical device in such a GIS has been performed by a wrecker method in which the electrical device is lifted by a crane (see, for example, Patent Document 1).

JP-A-9-163527

  The conventional electrical equipment installation and electrical equipment removal methods employ a tow-lift method that lifts electrical equipment with a crane, ensuring an electrical safety distance from the aerial main busbar where the live parts are exposed during construction. Because this is not possible, a security blackout is required for the fictional main bus. Therefore, in order to secure the power supply, it was extremely difficult to stop the power transmission system, and there was a problem that the power failure became a big problem in construction. In addition, there has been a problem that the loss of operation cost for ensuring the supply reliability that decreases with power failure is enormous.

  The present invention has been made to solve the above-described problems, eliminates a safety blackout of an aerial main bus in the installation work and removal work of electrical equipment, can secure power supply, and suppresses a loss due to a power failure. An object of the present invention is to provide a method for installing electrical equipment and a method for removing electrical equipment.

The present invention relates to an electrical equipment installation method in which electrical equipment is installed in an electrical facility having an overhead busbar with an exposed charging section, and the electrical equipment placed on the transport vehicle at the carry-in location is lifted by a lift outside the transport vehicle. The process of moving the transport vehicle from the lower part of the electrical equipment, the process of lowering the electrical equipment by the elevator and placing it on the horizontal mobile machine, and moving the electrical equipment in one horizontal direction by the horizontal mobile machine to the installation location of the electrical equipment A step of moving, and a step of moving the electric device up and down by an elevator and moving the electric device in another horizontal direction perpendicular to the horizontal one direction so as to coincide with the installation position of the electric device with respect to the electric equipment.

Further, the present invention provides an electrical equipment removal method for removing electrical equipment installed in an electrical installation having an overhead busbar with an exposed charging portion, wherein the electrical equipment to be removed is held in an elevator and moved in the other horizontal direction. The process of separating the electrical equipment from the electrical equipment and making it movable, the process of lowering the electrical equipment by the elevator and placing it on the horizontal mobile equipment, and the horizontal direction in which the electrical equipment is perpendicular to the other horizontal direction by the horizontal mobile equipment The process of moving in one direction and moving to the transportation location, the process of lifting the electrical equipment by the elevator, the process of intruding the transport vehicle into the lower part of the lifted electrical equipment and lowering the electrical equipment by the elevator and loading it on the transport vehicle It is equipped with.

The electrical equipment installation method according to the present invention is an electrical equipment installation method in which electrical equipment is installed in an electrical facility having an overhead busbar with an exposed charging portion. The process of moving the transport vehicle from the lower part of the electrical equipment by moving it up by an external elevator, the process of lowering the electrical equipment by the elevator and placing it on the horizontal mobile machine, and moving the electrical equipment in one horizontal direction by the horizontal mobile machine The process of moving to the installation location of the electrical equipment, and the process of installing the electrical equipment in accordance with the installation position of the electrical equipment with respect to the electrical equipment by raising the electrical equipment by the elevator and moving it in the other horizontal direction perpendicular to one horizontal direction. Since it is provided, it is possible to eliminate the safety blackout of the aerial main bus, secure the power supply, and suppress the loss accompanying the blackout.

Removal method of the electrical equipment of the invention is the removal method of the electrical equipment to remove the electrical equipment that is mounted to an electric equipment having an imaginary generatrix charging unit exposed, horizontal other electrical equipment to remove and held by elevator The process of moving in the direction to separate the electrical equipment from the electrical equipment and making it movable, the process of lowering the electrical equipment by the elevator and placing it on the horizontal mobile machine, and the horizontal direction of the electrical equipment by the horizontal mobile machine The process of moving to a transportation location by moving in one horizontal direction that is perpendicular to the vertical direction, the process of lifting the electrical equipment by a lift, and the transport vehicle entering the lower part of the lifted electrical equipment and lowering the electrical equipment by the lift It is possible to eliminate the safety power outage of the overhead main bus, secure the power supply, and suppress the loss due to the power outage.

Embodiment 1 FIG.
Embodiments of the present invention will be described below. FIG. 1 is a plan view showing the overall configuration of an electrical equipment in which the electrical equipment installation method and electrical equipment removal method according to Embodiment 1 of the present invention are performed, and FIG. 2 shows the overall configuration of the electrical equipment shown in FIG. FIG. 3 is a side view, FIG. 3 is a diagram showing a state of jack-up of the electrical equipment in which the electrical equipment installation method and electrical equipment removal method in Embodiment 1 are performed, and FIG. 4 is the electrical equipment to be removed or installed in Embodiment 1. It is a figure which shows the loading or unloading method to the transport vehicle. In the figure, a gas insulated switchgear 1 as an electrical facility is exposed to a GCB (gas circuit breaker: GAS CIRCUIT BREAKER) 2 to be removed or installed, an overhead wire 3, an overhead power transmission line 4, and a charging part. The imaginary main bus 5 and the steel structure 6 are provided. Also, a transport vehicle 7 for transporting the GCB 2, a jackup device 8 as a lifting device for lifting the GCB 2, and a roller pulling as a horizontal moving device for horizontally moving the GCB 2 A roller device 9 is used.

  Next, an electrical equipment installation method and an electrical equipment removal method according to Embodiment 1 of the electrical equipment configured as described above will be described. First, the removal method of GCB2 is demonstrated. The GCB 2 installed and used in the gas insulated switchgear 1 is connected to the gas insulated switchgear 1 as one of the components of the gas insulated switchgear 1. The jack-up device 8 is attached to the GCB 2 so that the GCB 2 is held and separated from the foundation so as to be horizontally movable (the left part of FIG. 3B is shown). Next, the GCB 2 is separated from the gas insulated switchgear 1 and the GCB 2 is lowered by the jackup device 8 and placed on the roller device 9. next. The GCB 2 is horizontally moved by the roller device 9 and moved to a position where the transport vehicle 7 can enter, that is, a transport location. Next, the GCB 2 transported to a position where the transport vehicle 7 can enter the jack up device 8 until the space where the loading platform portion of the transport vehicle 7 can enter the lower portion of the GCB 2 can be secured using the jack up device 8. (Fig. 3 (a), right part of (b), (c)) Next, the loading platform portion of the transport vehicle 7 is moved into this space and inserted into the lower portion of the GCB 2, and the GCB 2 is lowered by the jack-up device 8 and loaded onto the transport vehicle 7 (FIG. 4).

  Next, the installation method of GCB2 is demonstrated. In addition, what is necessary is just to repeat the procedure contrary to the removal construction method shown above fundamentally. That is, first, the GCB 2 assembled in the factory is placed on the transport vehicle 7 and transported to the loading position of the gas insulated switchgear 1 (loaded while being loaded on the transport vehicle 7 to the vicinity of the gas insulated switchgear 1). Then, the jackup device 8 is mounted on the GCB 2 loaded on the transport vehicle 7 and slightly lifted from the loading platform portion of the transport vehicle 7 (FIG. 4). Thereafter, the transport vehicle 7 is moved to move the loading platform portion from the lower part of the GCB 2 (right portions of FIGS. 3A and 3B, (c)). Next, the GCB 2 in which the loading platform portion of the transport vehicle 7 is eliminated at the lower portion is lowered to the ground level by the jack-up device 8 and placed on the roller device 9.

  Next, the GCB 2 is horizontally moved by roller drawing by the roller device 9 to the installation location of the gas insulated switchgear 1. Next, the jack up device 8 raises the GCB 2 to adjust the connection position with the gas insulated switchgear 1 and connect it. Next, after the connection with the gas insulated switchgear 1 is completed, the jackup device 8 is removed from the GCB 2 to complete the update operation. Therefore, the jack-up device 8 is used to remove and install the GCB 2 from the gas insulated switchgear 1, load the transport vehicle 7, unload the transport vehicle 7, and assemble the gas insulated switchgear 1. When carrying out the above, since there is almost no protrusion to the upper part of the gas insulated switchgear 1, a sufficient electrical safety separation distance from the aerial main bus 5 where the charging part is exposed is ensured.

  According to the electrical equipment installation method and electrical equipment removal method in Embodiment 1 performed as described above, the wire rope is hooked on the GCB to be removed or installed, and lifted by a crane, as in the conventional wrecker method. There is no need, and an electrical safety distance between the upper end of the GCB and the aerial main bus where the charging unit is exposed can be sufficiently secured, so that problems such as flashover do not occur. Therefore, during the construction period, a safety blackout for the overhead main bus is not required, and an uninterruptible construction method is possible in the removal / installation work of the GCB, so that power supply can be secured and loss due to the power failure can be suppressed.

  In the first embodiment, the uninterruptible power generation method in the removal / installation work of the GCB has been described. However, other electric devices constituting the gas insulated switchgear, such as a circuit breaker (CB), a disconnecting switch (DS), It goes without saying that the same effect can be obtained if the same operation is performed in the removal / installation work of the current transformer (CT), the instrument transformer (PT), and the lightning arrester (LA).

BRIEF DESCRIPTION OF THE DRAWINGS It is a top view which shows the whole structure of the electric equipment in which the installation construction method of the electric equipment of Embodiment 1 of this invention and the removal construction method of an electric equipment are performed. It is a side view which shows the whole structure of the electric equipment shown in FIG. It is a figure which shows the raising / lowering state of the jack-up of the electric equipment in which the installation method of the electric equipment and the removal method of an electric equipment in Embodiment 1 are performed. It is a figure which shows the state of the loading or unloading to the transport vehicle of the electric equipment with which the installation construction method of the electric equipment and the electrical equipment removal construction method in Embodiment 1 are performed.

Explanation of symbols

1 gas insulated switchgear, 2 GCB, 5 aerial main bus, 7 transport vehicle,
8 Jack-up device, 9 roller device.

Claims (2)

In the electrical equipment installation method in which electrical equipment is installed in an electrical facility having an aerial bus with exposed live parts, the electrical equipment placed on the transport vehicle at the loading location is raised by an elevator outside the transport vehicle, and the transport is performed. A step of moving the vehicle from the lower part of the electric device, a step of lowering the electric device by the elevator and placing the electric device on a horizontal moving device, and moving the electric device in one horizontal direction by the horizontal moving device. The step of moving to the installation location of the equipment, and the electric equipment is raised by an elevator and moved in the other horizontal direction perpendicular to the one horizontal direction to install in accordance with the installation position of the electric equipment with respect to the electric equipment An electrical equipment installation method characterized by comprising a process. In the electrical equipment removal method for removing electrical equipment installed in an electrical installation having an overhead busbar with exposed live parts, the electrical equipment to be removed is held in a lift and moved in the other horizontal direction to move the electrical equipment. Separating the electrical equipment from a movable state, lowering the electrical equipment by an elevator and placing the electrical equipment on a horizontal mobile device, and causing the electrical equipment to be perpendicular to the other horizontal direction by the horizontal mobile device. A step of moving in one horizontal direction and moving to a transportation location, a step of lifting the electric device by an elevator, a transport vehicle entering the lower part of the lifted electric device, and lowering the electric device by the elevator A method for removing electrical equipment, comprising the step of loading the transport vehicle.

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