JP7395375B2 - How to update power receiving and substation equipment - Google Patents

Description

Embodiments of the present invention relate to a method for updating power receiving and transforming equipment.

Power receiving and substation equipment receives high-voltage electricity sent from a power plant through a substation and converts it into the voltage that is ultimately used. The power receiving and transforming equipment that accepts extra-high voltage electricity exceeding 7kV includes a plurality of extra-high power receiving and distribution equipment, high-voltage power distribution equipment, and low-voltage power distribution equipment. Low-voltage distribution equipment supplies power to loads. Updating power receiving and substation equipment requires limiting the power supply capacity to the load and suppressing the impact of power outages on the load.

Japanese Patent Application Publication No. 6-225364 Japanese Patent Application Publication No. 2011-64580 JP2010-288428A Japanese Patent Application Publication No. 2000-294425 Japanese Patent Application Publication No. 6-77068

The problem to be solved by the present invention is to provide a method for updating power receiving and transforming equipment that can suppress the influence on the load.

The method for updating power receiving and transforming equipment according to the embodiment includes a new installation process, a switching process, and a removal process.
In the power receiving and transforming equipment, a plurality of equipment including a plurality of extra-high power receiving and distribution equipment, high voltage power distribution equipment, and low voltage power distribution equipment are arranged in an electrical room. In the new installation process, the first equipment among the plurality of equipment is fixed and newly installed in an existing empty space in the electrical room. In the switching process, connection and energization are switched from the existing first equipment to the newly installed first equipment. In the removal process, the existing first equipment is removed, and an empty space is created in the electrical room where the newly installed first equipment is not installed . A new installation process, a switching process, and a removal process are performed using each of the plurality of pieces of equipment as the first piece of equipment in order.

A plan view of the power receiving and transforming equipment before updating. A plan view of the updated power receiving and transforming equipment. 1 is a flowchart of a method for updating power receiving and transforming equipment according to an embodiment. An explanatory diagram of the new installation process, switching process, and removal process of high-voltage power distribution equipment. A plan view of the newly installed channel base of the power distribution board on the +X side of the high-voltage power distribution equipment. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5; A plan view of the newly installed channel base of the -X side switchboard of the high-voltage power distribution equipment. FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 7; An explanatory diagram of the new installation process and switching/removal process of the first extra-high power receiving and distribution equipment. Front view of the first extra-high power receiving and distribution equipment. A side view of the first extra-high power receiving and distribution equipment. Explanatory diagram of the new installation process and switching/removal process of the second extra-high power receiving and distribution equipment. Explanatory diagram of the new installation process and switching/removal process of the third extra-high power receiving and distribution equipment. An explanatory diagram of the new installation process, switching process, and removal process of low-voltage power distribution equipment.

Hereinafter, a method for updating power receiving and transforming equipment according to an embodiment will be described with reference to the drawings.
FIG. 1 is a plan view of the power receiving and transforming equipment before updating. In this application, the Z direction, X direction, and Y direction of the orthogonal coordinate system are defined as follows. The Z direction is a vertical direction, and the +Z direction is an upward direction. The X direction and the Y direction are horizontal directions. For example, the X direction is the direction in which the plurality of equipments 10, 20, and 30 are lined up in the electrical room 1. The Y direction is the depth direction of the plurality of facilities 10, 20, and 30.

The electrical room 1 is installed in a building of a public or commercial facility. The electrical room 1 has an entrance 2 and a pillar 3. The entrance 2 is provided at the center of the wall in the -Y direction in the X direction.
Inside the electrical room 1, power receiving and transforming equipment 5 is arranged. The power receiving and substation equipment 5 receives high-voltage electricity sent from a power plant through a substation, and converts it into a voltage for final use. The power receiving and transforming equipment 5 of the embodiment receives extra high voltage electricity exceeding 7 kV. The power receiving and transforming equipment 5 includes a plurality of equipment, such as extra-high power receiving and distributing equipment 10, high voltage power distribution equipment 20, and low voltage power distribution equipment 30. The extra high-voltage power receiving and distribution equipment 10, the high-voltage power distribution equipment 20, and the low-voltage power distribution equipment 30 step down the voltage of electricity received from the substation in order. The extra-high power receiving and distribution equipment 10 is connected to an external substation or the like (not shown). The low-voltage power distribution equipment 30 is connected to a plurality of loads L1 and L2 that consume electricity in public and commercial facilities.

The power receiving and transforming equipment 5 is a three-line spot network power receiving equipment. The three-line spot network power receiving equipment is a power receiving equipment that always receives power from three special high-voltage distribution lines and interconnects the secondary side of the transformer. By receiving power through one line or two lines, it is possible to supply power to the loads L1 and L2 of public and commercial facilities. Therefore, the three-line spot network power receiving equipment can supply power to the loads L1 and L2 even if one line of the power distribution line is stopped. In order to receive power from three lines, the extra-high-voltage power receiving and distribution equipment 10 connects multiple extra-high-voltage power receiving and distributing facilities, such as the first extra-high-voltage power receiving and distributing equipment 11, the second extra-high-voltage power receiving and distributing equipment 12, and the third extra-high-voltage power receiving and distributing equipment 13. has.

In this application, e is added to the end of the symbol for equipment and cables before the update (existing). An n is added to the end of the code for updated (newly installed) equipment and cables. Cables that are temporarily installed during the update are suffixed with an m.

As shown in FIG. 1, in the power receiving and transforming equipment 5e before updating, the existing extra-high power receiving and distributing equipment 10e, high voltage power distribution equipment 20e, and low voltage power distribution equipment 30e are arranged in this order in the X direction. The extra-high power reception and distribution equipment 10e is configured by arranging a first extra-high power reception and distribution equipment 11e, a second extra-high power reception and distribution equipment 12e, and a third extra-high power reception and distribution equipment 13e in the Y direction. The existing high-voltage power distribution equipment 20e and low-voltage power distribution equipment 30e are configured by arranging a plurality of power distribution boards in the Y direction. The plurality of extra-high power receiving and distribution facilities 11e, 12e, 13e and the high-voltage power distribution facility 20e are connected by a plurality of high-voltage cables 16e, 17e, 18e. The high-voltage power distribution equipment 20e and the low-voltage power distribution equipment 30e are connected by a low-voltage cable 25e. The low-voltage power distribution equipment 30e is connected to a plurality of loads L1, L2 by a plurality of load cables 36e, 37e. A capacitor equipment 7 is arranged along the wall of the electrical room 1 in the -Y direction. The existing capacitor equipment placed between the high voltage power distribution equipment 20e and the low voltage power distribution equipment 30e has been removed. As a result, a first space A1, which is an empty space, exists between the high voltage power distribution equipment 20e and the low voltage power distribution equipment 30e.

FIG. 2 is a plan view of the updated power receiving and transforming equipment. In the updated power receiving and transforming equipment 5n, the newly installed low voltage power distribution equipment 30n, extra high voltage power receiving and distribution equipment 10n, and high voltage power distribution equipment 20n are arranged in this order in the X direction. The newly installed high voltage power distribution equipment 20n is configured by arranging a plurality of switchboards in the X direction and the Y direction. The plurality of extra-high power receiving and distribution equipment 11n, 12n, 13n and the high-voltage power distribution equipment 20n are connected by a plurality of high-voltage cables 16n, 17n, 18n. The high-voltage power distribution equipment 20n and the low-voltage power distribution equipment 30n are connected by a low-voltage cable 25n. The low-voltage power distribution equipment 30n is connected to the same loads L1 and L2 as before the update by a plurality of load cables 36n and 37n.

FIG. 3 is a flowchart of the method for updating power receiving and transforming equipment according to the embodiment. In the method for updating power receiving and transforming equipment 5 according to the embodiment, a new installation process, a switching process, and a removal process are performed using each of the plurality of equipment 10, 20, and 30 as the first equipment in order. In the new installation process, the first equipment is newly installed in the empty space of the electrical room 1. In the switching process, connection and energization are switched from the existing first equipment to the newly installed first equipment. In the removal process, the existing first equipment is removed and a vacant space is created in the electrical room 1.

As shown in FIG. 3, a new installation process S1, a switching process S2, and a removal process S3 are performed using the high voltage power distribution equipment 20 as the first equipment.
FIG. 4 is an explanatory diagram of a new installation process, a switching process, and a removal process of high-voltage power distribution equipment. In the new installation process S1 of the high voltage power distribution equipment 20, the high voltage power distribution equipment 20n is newly installed in the first space A1 of the electrical room 1. Test and adjustment of the newly installed high voltage distribution equipment 20n will be carried out.

FIG. 5 is a plan view of the newly installed channel base of the +X side switchboard of the high voltage power distribution equipment. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. As shown in FIG. 6, the switchboard of the newly installed high-voltage power distribution equipment 20n is fixed to a newly installed channel base 50 formed of C-shaped steel. As shown in FIG. 5, the newly installed channel base 50 is constructed by combining C-section steel into a rectangular shape. As shown in FIG. 6, an existing channel base 40 of the capacitor equipment that has already been removed exists in the first space A1. The existing channel base 40 is embedded in the floor surface FL. The work of removing the existing channel base 40 and embedding the newly installed channel base 50 in the floor surface FL requires a lot of time and cost. In the embodiment, the newly installed channel base 50 is fixed to the existing channel base 40.

As described above, the newly installed high voltage power distribution equipment 20n is configured by arranging a plurality of switchboards in the X direction and the Y direction (see FIG. 2). The +X side switchboard of the high-voltage power distribution equipment 20n is fixed to the newly installed channel base 50a shown in FIG. 5. As shown in FIG. 6, the +X-direction C-shaped steel of the new channel base 50a is placed over the C-shaped steel of the existing channel base 40. In this part, the new channel base 50a is directly fixed to the existing channel base 40. A fixed boss 42 is already installed on the existing channel base 40. A fixing plate 51 of the newly installed channel base 50a is arranged above the fixing boss 42. The fixing plate 51 is arranged so as to straddle the opening of the C-beam of the new channel base 50a, and is fixed to the new channel base 50a by welding or the like. The fixing plate 51 is fixed to the fixing boss 42 by a foundation bolt 52. As shown in FIG. 5, a large diameter hole 54 is formed in the C-shaped steel above the fixed plate 51. The foundation bolt 52 is fastened through the large diameter hole 54.

As shown in FIG. 5, the existing fixed boss 42 does not exist below the C-shaped steel in the −X direction of the new channel base 50a. In this part, a fixed boss 43 is newly installed on the existing channel base 40. As described above, the fixing plate 51 of the newly installed channel base 50a is fixed to the fixing boss 43 with the foundation bolt 53.
As described above, the newly installed channel base 50a is fixed to the existing channel base 40. As shown in FIG. 6, the +X side switchboard of the high voltage power distribution equipment 20n is fixed to the newly installed channel base 50a with fixing bolts 29.

FIG. 7 is a plan view of the newly installed channel base of the -X side switchboard of the high voltage power distribution equipment. FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 7. The −X side power distribution board of the high voltage power distribution equipment 20n is fixed to the newly installed channel base 50b shown in FIG. Adjacent in the −X direction to the newly installed channel base 50a for the +X side power distribution board described above, a new channel base 50b for the −X side power distribution board is arranged. As shown in FIG. 7, the existing fixed boss 42 does not exist below the C-shaped steel in the +X direction of the new channel base 50b. In this part, a fixed boss 43 is newly installed on the existing channel base 40. As described above, the fixing plate 51 of the newly installed channel base 50a is fixed to the fixing boss 43 with the foundation bolt 53.

There is also no existing fixed boss 42 below the C-shaped steel in the -X direction of the new channel base 50b. The existing fixed boss 42 is located apart from the new channel base 50b in the −X direction. In this portion, the new channel base 50b is indirectly fixed to the existing channel base 40 via a connecting member such as an L-angle fitting 60. As shown in FIG. 8, the first plate of the L-angle fitting 60 is placed above the fixed boss 42 of the existing channel base 40. The first plate of the L-angle fitting 60 is fixed to the fixed boss 42 by a foundation bolt 62. A second plate of the L-angle fitting 60 is arranged along the side surface of the new channel base 50 in the -X direction. A fixed boss 57 is newly installed on the newly installed channel base 50. The second plate of the L-angle fitting 60 is fixed to the fixed boss 47 with a foundation bolt 67. As a result, the newly installed channel base 50 is fixed to the existing channel base 40 via the L-angle fitting 60.
Through the above steps, the newly installed channel base 50b is fixed to the existing channel base 40. The −X side power distribution board of the high voltage power distribution equipment 20n is fixed to the newly installed channel base 50b with fixing bolts 29.

As a result of the above, the high voltage power distribution equipment 20n is newly installed in the first space A1. By using the existing channel base 40, the time and cost of the new installation process S1 of the high voltage power distribution equipment 20n can be suppressed. Since the existing channel base 40 is not removed, damage to the power receiving and transforming equipment 5 due to removal work is avoided. Malfunctions of the power receiving and transforming equipment 5 due to vibrations during removal are avoided.
The existing channel base 40 is similarly utilized in new installation steps S4, S6, S8 of a plurality of extra-high power receiving and distribution facilities 11, 12, and 13, and new installation step S10 of a low-voltage power distribution facility 30, which will be described later.

As shown in FIG. 3, in the switching process S2 of the high voltage power distribution equipment 20, the connection and energization are switched from the existing high voltage power distribution equipment 20e to the newly installed high voltage power distribution equipment 20e. As shown in FIG. 4, the plurality of extra-high voltage power receiving and distribution facilities 11e, 12e, and 13e and the newly installed high-voltage power distribution facility 20n are connected by a plurality of high-voltage cables 16m, 17m, and 18m. The newly installed high-voltage power distribution equipment 20n and low-voltage power distribution equipment 30e are connected by a 25-m low-voltage cable. The newly installed high-voltage power distribution equipment 20n begins to be energized. Power supply to the existing high voltage power distribution equipment 20e is stopped. A plurality of high-voltage cables 16e, 17e, 18e connecting the plurality of extra-high power receiving and distribution equipment 11e, 12e, 13e and the existing high-voltage power distribution equipment 20n are removed. The low voltage cable 25e connecting the existing high voltage distribution equipment 20e and the low voltage distribution equipment 30e is removed.

In the high-voltage power distribution equipment 20 removal process S3, the existing high-voltage power distribution equipment 20e is removed. As a result, a second space A2, which is a new empty space, is created between the extra high voltage power receiving and distribution equipment 10e and the newly installed high voltage power distribution equipment 20n.

As shown in FIG. 3, a new installation process, a switching process, and a removal process are performed using each of the plurality of extra-high power receiving and distribution equipment 11, 12, and 13 as the first equipment in order. First, a new installation process S4 and a switching/removal process S5 are performed using the first extra-high power receiving and distribution equipment 11 as the first equipment.
FIG. 9 is an explanatory diagram of a new installation process and a switching/removal process of the first extra-high power receiving and distribution equipment. In the step S4 of newly installing the first extra high power receiving and distribution equipment 11, the first extra high power receiving and distributing equipment 11n is newly installed in the second space A2 of the electrical room 1. Testing and adjustment of the newly installed 1st extra-high power receiving and distribution equipment 11n will be carried out.

The first extra-high power receiving and distribution equipment 11n is carried into the electrical room 1 through the entrance 2, passes between each piece of equipment and the pillar 3, and is placed in the second space A2. The size of the first extra-high power receiving and distribution equipment 11n is large. Therefore, it is difficult for the first extra-high power receiving and distribution equipment 11n to pass between each equipment and the pillar 3.
FIG. 10 is a front view of the first extra-high power receiving and distribution equipment. FIG. 11 is a side view of the first extra-high power receiving and distribution equipment. The first extra-high power receiving and distribution equipment 11n is divided and transported into the electrical room 1. As shown in FIG. 10, the first extra-high power receiving and distribution equipment 11n is divided in the Y direction at a first division part D1 and a second division part D2. The first extra-high power receiving and distribution equipment 11n is divided in the Z direction at the third division portion D3. As shown in FIG. 11, the first extra-high power receiving and distribution equipment 11n is divided in the X direction at the fourth dividing portion D4. The divided first extra-high power receiving and distribution equipment 11n can pass between each equipment and the pillar 3. The divided first extra-high power receiving and distribution equipment 11n is assembled in the electrical room 1 and installed in the second space A2.

As shown in FIG. 9, a first transformer 11t is arranged inside the first extra-high power receiving and distribution equipment 11n. The first transformer 11t is also divided and carried into the electrical room 1. A large space is required to assemble the first transformer 11t. In the second space A2, there is a large space in addition to the installation space for the first extra-high power receiving and distribution equipment 11n. The first extra-high power receiving and distribution equipment 11n is assembled in the second space A2 and placed inside the first extra-high power receiving and distributing equipment 11n.

In the switching/removal step S5 of the first extra-high power receiving and distribution equipment 11, the connection and energization are switched from the existing first extra-high power receiving and distributing equipment 11e to the newly installed first extra-high power receiving and distributing equipment 11n. The newly installed first extra-high power receiving and distribution equipment 11n and the high voltage power distribution equipment 20n are connected by a high voltage cable 16n. The newly installed first extra-high power receiving and distribution equipment 11n starts to be energized. The energization of the existing first extra-high power receiving and distribution equipment 11e is stopped. The high-voltage cable 16m connecting the existing first extra-high power receiving and distribution equipment 11e and the high-voltage power distribution equipment 20n will be removed.
The existing first extra-high power receiving and distribution equipment 11e will be removed. A third space A3, which is a new empty space, is created in the removed area.
The switching/removal step S5 of the first extra-high power receiving and distribution equipment 11 may be performed in the switching/removing step S7 of the second extra-high power receiving and distributing equipment 12, which will be described later.

A new installation process S6 and a switching/removal process S7 are performed using the second extra-high power receiving and distribution equipment 12 as the first equipment.
FIG. 12 is an explanatory diagram of the new installation process and the switching/removal process of the second extra-high power receiving and distribution equipment. In the step S6 of newly installing the second extra high power receiving and distribution equipment 12, the second extra high power receiving and distributing equipment 12n is newly installed in the second space A2 of the electrical room 1. Similar to the first extra high power receiving and distribution equipment 11n, the second extra high power receiving and distributing equipment 12n is also divided and carried into the electrical room 1. The divided second extra-high power receiving and distribution equipment 12n is assembled in the electrical room 1 and installed in the second space A2.
A second transformer 12t is arranged inside the second extra-high power receiving and distribution equipment 12n. The second transformer 12t is also divided and carried into the electrical room 1. The second transformer 12t is assembled in the second space A2 or the third space A3 and placed inside the second extra-high power receiving and distribution equipment 12n.
Testing and adjustment of the newly installed 2nd extra-high power receiving and distribution equipment 12n will be carried out.

In the switching/removal step S7 of the second extra-high power receiving and distribution equipment 12, the connection and energization are switched from the existing second extra-high power receiving and distributing equipment 12e to the newly installed second extra-high power receiving and distributing equipment 12n. The newly installed second extra-high power receiving and distribution equipment 12n and the high voltage power distribution equipment 20n are connected by a high voltage cable 17n. The newly installed second extra-high power receiving and distribution equipment 12n starts to be energized. The energization of the existing second extra-high power receiving and distribution equipment 12e is stopped. The high-voltage cable 17m connecting the existing second extra-high power receiving and distribution equipment 12e and the high-voltage power distribution equipment 20n will be removed.
The existing second extra-high power receiving and distribution equipment 12e will be removed. As a result, a new empty space is created and the third space A3 is expanded.

A new installation process S8 and a switching/removal process S9 are performed using the third extra-high power receiving and distribution equipment 13 as the first equipment.
FIG. 13 is an explanatory diagram of the new installation process and switching/removal process of the third extra-high power receiving and distribution equipment. In the step S8 of newly installing the third extra high power receiving and distribution equipment 13, the third extra high power receiving and distributing equipment 13n is newly installed in the second space A2 of the electrical room 1. Similar to the first extra high power receiving and distribution equipment 11n, the third extra high power receiving and distributing equipment 13n is also divided and carried into the electrical room 1. The divided third extra-high power receiving and distribution equipment 13n is assembled in the electrical room 1 and installed in the second space A2.
A third transformer 13t is arranged inside the third extra-high power receiving and distribution equipment 13n. The third transformer 13t is also divided and carried into the electrical room 1. The third transformer 13t is assembled in the third space A3 and placed inside the third extra-high power receiving and distribution equipment 13n.
Testing and adjustment of the newly installed 3rd extra-high power receiving and distribution equipment 13n will be carried out.

In the switching/removal step S9 of the third extra-high power receiving and distribution equipment 13n, the connection and energization are switched from the existing third extra-high power receiving and distributing equipment 13e to the newly installed third extra-high power receiving and distributing equipment 13n. The newly installed third high-voltage power receiving and distribution equipment 13n and the high-voltage power distribution equipment 20n are connected by a high-voltage cable 18n. The newly installed third extra-high power receiving and distribution equipment 13n starts to be energized. Power supply to the existing third extra-high power receiving and distribution equipment 13e is stopped. The high voltage cable 18m connecting the existing third extra-high power receiving and distribution equipment 13e and the high voltage distribution equipment 20n will be removed.
The existing third extra-high power receiving and distribution equipment 13e will be removed. As a result, a new empty space is created and the third space A3 is expanded.

In the new installation steps S4, S6, and S8 of the extra high power receiving and distribution equipment 10, the extra high power receiving and distributing equipment 10n is newly installed in the second space A2 adjacent to the existing extra high power receiving and distributing equipment 10e. In the removal steps S5, S7, and S9 of the extra-high power receiving and distribution equipment 10, the existing extra-high power receiving and distribution equipment 10e is removed to create a third space A3. The transformer is assembled in the second space A2 or the third space A3 and placed inside the extra-high power receiving and distribution equipment 10n in the second space A2. Thereby, the renewal work of the extra-high power receiving and distribution equipment 10 is carried out smoothly, and the time and cost of the renewal work are suppressed.

As shown in FIG. 3, a new installation step S10, a switching step S11, and a removal step S12 are performed using the low voltage power distribution equipment 30 as the first equipment.
FIG. 14 is an explanatory diagram of a new installation process, a switching process, and a removal process of low-voltage power distribution equipment. In the new installation process S10 of the low voltage power distribution equipment 30, the low voltage power distribution equipment 30n is newly installed in the third space A3 of the electrical room 1. Similar to the first extra high voltage power receiving and distribution equipment 11n, the low voltage power distribution equipment 30n is also divided into the X direction and the Y direction and transported into the electrical room 1. The divided low-voltage power distribution equipment 30n is assembled in the electrical room 1 and installed in the third space A3. Test and adjustment of the newly installed low voltage distribution equipment 30n will be carried out.

In the switching step S11 of the low voltage power distribution equipment 30, connection and energization are switched from the existing low voltage power distribution equipment 30e to the newly installed low voltage power distribution equipment 30n. The connection of the low voltage cable 25m is switched from the regular terminal of the high voltage distribution equipment 20n to the spare terminal. The regular terminal of the high-voltage power distribution equipment 20n and the newly installed low-voltage power distribution equipment 30n are connected by a low-voltage cable 25n. The newly installed low voltage power distribution equipment 30n starts to be energized in parallel with the existing low voltage power distribution equipment 30e.

The newly installed low voltage power distribution equipment 30n and the first load L1 are connected by the newly installed first load cable 36n. Power supply to the first load L1 is started from the newly installed low-voltage power distribution equipment 30n. Power supply to the first load L1 from the existing low-voltage power distribution equipment 30e is stopped. The existing first load cable 36e that connects the existing low-voltage power distribution equipment 30e and the first load L1 is removed. Similar operations are performed for other loads in turn. When the newly installed low-voltage power distribution equipment 30n starts energizing all the loads, the existing low-voltage power distribution equipment 30e is de-energized. The low voltage cable 25m connecting the high voltage distribution equipment 20n and the existing low voltage distribution equipment 30e will be removed.

In the low-voltage power distribution equipment 30 removal step S12, the existing low-voltage power distribution equipment 30e is removed. Through the above steps, the state shown in FIG. 2 is reached, and the update of the power receiving and distribution equipment 5 is completed.

As detailed above, the method for updating power receiving and transforming equipment 5 according to the embodiment includes a new installation process, a switching process, and a removal process. In the power receiving and transforming equipment 5 , a plurality of equipment including a plurality of extra-high power receiving and distributing equipment 11 , 12 , 13 , a high voltage power distribution equipment 20 , and a low voltage power distribution equipment 30 are arranged in the electrical room 1 . In the new installation process, the first equipment among the plurality of equipment is newly installed in the existing empty space of the electrical room 1. In the switching process, connection and energization are switched from the existing first equipment to the newly installed first equipment. In the removal process, the existing first equipment is removed and a vacant space is created in the electrical room 1. A new installation process, a switching process, and a removal process are performed using each of the plurality of pieces of equipment as the first piece of equipment in order.

In the method for updating power receiving and transforming equipment of the comparative example, power supply to the existing first equipment is stopped, the existing first equipment is removed, and a vacant space is created. A first equipment is newly installed in the empty space, and power supply to the newly installed first equipment is started. In the method of updating the power receiving and transforming equipment of the comparative example, the power supply to the first equipment is stopped for a long time, which has a large impact on the load.

In the method for updating the power receiving and transforming equipment 5 of the embodiment, the first equipment is newly installed in the existing vacant space in the new installation process, so the existing first equipment and the newly installed first equipment coexist. In the switching step, it is possible to continuously stop energizing the existing first equipment and start energizing the newly installed first equipment. Thereby, the power supply stoppage of the first equipment is suppressed in a short time. In the removal process, the existing first equipment is removed to create a new empty space. A new installation process, a switching process, and a removal process are performed using each of the plurality of pieces of equipment as the first piece of equipment in order. As a result, the update work can be performed while suppressing the power outage of a plurality of facilities in a short period of time. Therefore, the influence on the load can be suppressed.

A new installation process, a switching process, and a removal process are performed using each of the plurality of extra-high power receiving and distribution equipment 11, 12, and 13 as the first equipment in order.
For example, a three-line spot network power receiving facility has three extra-high power receiving and distributing facilities 11, 12, and 13. By updating each of the three extra-high power receiving and distributing facilities 11, 12, and 13 in order, power reception for two lines is always maintained. Thereby, power supply to the load can be maintained. Since the power outage of one line of extra-high power receiving and distribution equipment during the upgrade is suppressed to a short time, the risk of one line out of the three distribution lines being stopped is small. Therefore, the influence on the load is suppressed.

The low voltage power distribution equipment 30 is connected to a plurality of loads L1 and L2. When the switching process is performed using the low voltage distribution equipment 30 as the first equipment, connection and energization are sequentially performed from the existing low voltage distribution equipment 30e to the newly installed low voltage distribution equipment 30n for each of the plurality of loads L1 and L2. Implemented.
As a result, switching from the existing low-voltage power distribution equipment 30e to the newly installed low-voltage power distribution equipment 30n is performed for each of the plurality of loads L1 and L2 in turn. At this time, energization to other loads is maintained. Therefore, the influence on the load is suppressed.

In the new installation process, the first equipment is divided and transported into the electrical room 1.
The divided first equipment is assembled in the electrical room 1 and installed in the empty space. Thereby, even if there are restrictions on the layout of the electrical room 1, the first equipment can be installed in the electrical room 1.

In the new installation process, a new channel base 50 of the first equipment to be newly installed is connected to an existing channel base 40 existing in an existing empty space.
Compared to replacing the existing channel base 40 with a newly installed channel base 50, the time and cost of updating work can be reduced.

In the method for updating power receiving and transforming equipment according to the embodiment, the updating work is carried out in the order of the high voltage power distribution equipment 20, the extra-high power receiving and distribution equipment 10, and the low voltage power distribution equipment 30. The method for updating power receiving and transforming equipment may be performed in an order other than this.

According to at least one embodiment described above, the new installation process, the switching process, and the removal process are performed using each of the plurality of pieces of equipment as the first piece of equipment in order. In the new installation process, the first equipment is newly installed in the existing empty space of the electrical room 1. In the removal process, the existing first equipment is removed and a vacant space is created in the electrical room 1. Thereby, the update work is performed while suppressing the power supply stoppage of a plurality of facilities in a short period of time, so that the influence on the load can be suppressed.

Although several embodiments of the invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included within the scope and gist of the invention as well as within the scope of the invention described in the claims and its equivalents.

A1...First space (empty space), L1, L2...Load, 1...Electrical room, 5...Power receiving and transforming equipment, 10, 10e, 10n...Extra high power receiving and distribution equipment, 11, 11e, 11n...1st special high power receiver Power distribution equipment, 12, 12e, 12n... 2nd extra high power receiving and distribution equipment, 13, 13e, 13n... 3rd extra high power receiving and distributing equipment, 20, 20e, 20n... high voltage power distribution equipment, 30, 30e, 30n... low voltage power distribution equipment , 40...Existing channel base, 50...Newly established channel base.

Claims (5)

A method for updating power receiving and transforming equipment in which a plurality of equipment including a plurality of extra-high power receiving and distribution equipment, high voltage power distribution equipment, and low voltage power distribution equipment are arranged in an electrical room, the method comprising:
a new installation step of fixing and newly installing a first equipment among the plurality of equipment in an existing empty space of the electrical room;
a switching step of switching connection and energization from the existing first equipment to the newly installed first equipment;
a removal step of removing the existing first equipment to create a vacant space in the electrical room where the newly installed first equipment will not be installed ;
The new installation step, the switching step, and the removal step are performed using each of the plurality of facilities as the first facility in order,
How to update power receiving and substation equipment. A method for updating power receiving and transforming equipment in which a plurality of equipment including a plurality of extra-high power receiving and distribution equipment, high voltage power distribution equipment, and low voltage power distribution equipment are arranged in an electrical room, the method comprising:
a new installation step of newly installing a first equipment among the plurality of equipment in an existing empty space of the electrical room;
a switching step of switching connection and energization from the existing first equipment to the newly installed first equipment;
a removal step of removing the existing first equipment to create a vacant space in the electrical room;
The new installation step, the switching step, and the removal step are performed using each of the plurality of facilities as the first facility in order,
The new installation step, the switching step, and the removal step are performed using each of the plurality of extra-high power receiving and distribution facilities as the first facility in order,
How to update power receiving and substation equipment. A method for updating power receiving and transforming equipment in which a plurality of equipment including a plurality of extra-high power receiving and distribution equipment, high voltage power distribution equipment, and low voltage power distribution equipment are arranged in an electrical room, the method comprising:
a new installation step of newly installing a first equipment among the plurality of equipment in an existing empty space of the electrical room;
a switching step of switching connection and energization from the existing first equipment to the newly installed first equipment;
a removal step of removing the existing first equipment to create a vacant space in the electrical room;
The new installation step, the switching step, and the removal step are performed using each of the plurality of facilities as the first facility in order,
In the new installation step, the channel base of the first equipment to be newly installed is connected to the existing channel base existing in the existing empty space.
How to update power receiving and substation equipment. The low voltage distribution equipment is connected to a plurality of loads,
When the switching step is performed using the low voltage distribution equipment as the first equipment, connection and energization are sequentially performed from the existing low voltage distribution equipment to the newly installed low voltage distribution equipment for each of the plurality of loads. carried out,
The method for updating power receiving and transforming equipment according to any one of claims 1 to 3 . In the new installation step, the first equipment is divided and transported into the electrical room.
The method for updating power receiving and transforming equipment according to any one of claims 1 to 4 .

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