Gas-insulated switchgear and power reception / transformation equipment

Abstract

Provided are a gas-insulated switchgear and power reception / transformation equipment that can be made more compact. A gas-insulated switchgear according to the present invention comprises a bus chamber (2), first and second insulation spacers (40d, 40e) that are positioned away from the center of the bus chamber (2) in a third direction and respectively support first and second fixed-side electrodes of first and second disconnectors, first and second support members (40f, 40g) that respectively support first and second mobile-side electrodes to be aligned with the first and second fixed-side electrodes in the third direction, and straight first and second connection conductors that respectively connect a bus conductor and the first and second mobile-side electrodes.

Description

Gas-insulated switchgear and substation equipment

[0001] The present disclosure relates to a gas-insulated switchgear, particularly a three-phase integrated gas-insulated switchgear, and a power receiving and transforming facility using the same.

[0002] BACKGROUND ART Generally, power receiving and transforming equipment is installed in facilities, buildings, etc. In such power receiving and transforming equipment, gas-insulated switchgears that are small in size and require a small installation area are preferably used.

[0003] Nissin Electric Co., Ltd., "Ultra-compact gas insulated switchgear (XAE7)", Catalog, No. 683 R8

[0004] There is room for improvement in the compactness of gas-insulated switchgear.

[0005] The present disclosure has been made in consideration of the above-mentioned problems, and has an object to provide a gas-insulated switchgear and a power receiving and transforming facility that can be made compact.

[0006] In order to solve the above-described problems, a gas-insulated switchgear according to one aspect of the present disclosure includes: a bus room; first disconnectors of each phase provided in the bus room along a first direction; second disconnectors of each phase provided in the bus room along the first direction, the second disconnectors of each phase provided in the bus room so as to face the first disconnectors of each phase in a second direction perpendicular to the first direction; and bus conductors of each phase provided at intermediate positions between the first disconnectors and the second disconnectors of each phase in the second direction. Also, in a three-phase integrated gas-insulated switchgear, each of the first disconnectors has a first fixed-side electrode, a first movable-side electrode, and a first movable-side electrode rod that is movably supported by the first movable-side electrode and can be moved toward and away from the first fixed-side electrode from a third direction perpendicular to the first direction and the second direction, and each of the second disconnectors has a second fixed-side electrode, a second movable-side electrode, and a second movable-side electrode rod that is movably supported by the second movable-side electrode and can be moved toward and away from the second fixed-side electrode from the third direction, a first insulating spacer for each phase that is arranged at a position away from the center of the busbar chamber in the third direction and that supports the first fixed-side electrode to lead out the first fixed-side electrode to the outside of the busbar chamber; a second insulating spacer for each phase that is arranged opposite the first insulating spacer in the second direction and that supports the second fixed-side electrode to lead out the second fixed-side electrode to the outside of the busbar chamber; a first support member for each phase that supports the first movable-side electrode of each phase so that the first movable-side electrode is aligned with the first fixed-side electrode of each phase in the third direction; a second support member for each phase that is arranged opposite the first support member in the second direction and that supports the second movable-side electrode of each phase so that the second movable-side electrode is aligned with the second fixed-side electrode of each phase in the third direction; a linear first connecting conductor for each phase that connects the busbar conductor and the first movable-side electrode; and a linear second connecting conductor for each phase that connects the busbar conductor and the second movable-side electrode.

[0007] Furthermore, a power receiving and transforming facility according to one aspect of the present disclosure includes the above-described gas-insulated switchgear, a transformer connected to the gas-insulated switchgear, and an electric power supply and demand instrument transformer connected to the bus conductor.

[0008] According to one aspect of the present disclosure, it is possible to provide a gas-insulated switchgear and a power receiving and transforming facility that can be made compact.

[0009] 1 is a perspective view showing an external configuration of a gas-insulated switchgear according to an embodiment of the present disclosure; FIG. 2 is a side view showing an external configuration of the gas-insulated switchgear; FIG. 3 is a single-line diagram showing a circuit configuration of the gas-insulated switchgear; FIG. 4 is a side view showing an external configuration of a power receiving and substation facility including the gas-insulated switchgear; FIG. 5 is a plan view showing an external configuration of the power receiving and substation facility; FIG. 6 is a diagram explaining an example of the internal configuration of a busbar chamber shown in FIG. 1; FIG. 7 is a diagram explaining the connection structure shown in FIG. 8; FIG. 9 is a diagram explaining the height dimension of the busbar chamber and the insulation distance inside the busbar chamber; FIG. 10 is a diagram explaining the height dimension of a busbar chamber of a gas-insulated switchgear according to a comparative example and the insulation distance inside the busbar chamber; FIG. 11 is a diagram explaining an example of the internal configuration of a busbar chamber of a gas-insulated switchgear according to a modified example;

[0010]

[0033] An embodiment of the present disclosure will be described in detail below. In the following description, a case will be described in which a three-phase integrated gas-insulated switchgear 101 according to the present disclosure is applied to a power receiving and transforming facility 300 installed in a substation or the like.

[0011] Fig. 1 is a perspective view showing the external configuration of a gas-insulated switchgear 101 according to an embodiment of the present disclosure. Fig. 2 is a side view showing the external configuration of the gas-insulated switchgear 101. Fig. 3 is a single-line diagram showing the circuit configuration of the gas-insulated switchgear 101. Fig. 4 is a side view showing the external configuration of a power receiving and transforming facility 300 including the gas-insulated switchgear 101. Fig. 5 is a plan view showing the external configuration of the power receiving and transforming facility 300.

[0012] In the following description, the up-down direction, the front-rear direction, and the left-right direction of the gas-insulated switchgear 101 are defined as shown by the double-headed arrows in Fig. 1. The first direction, the second direction, and the third direction are the front-rear direction, the up-down direction, and the left-right direction, respectively. The up-down direction (second direction) indicates the height direction relative to the installation surface of the gas-insulated switchgear 101.

[0013] 1 to 3 , a gas-insulated switchgear 101 of this embodiment includes a current transformer CT, a cable head CHD, a power receiving unit 1, a busbar room 2, a transformer unit 3, and a connection unit 4. The power receiving unit 1 has a first unit 11 and a second unit 12. The current transformer CT measures the current flowing through the line L. An end of a cable of the line L is connected to the cable head CHD.

[0014] The second unit 12, the busbar room 2, and the transformer unit 3 are arranged so as to be stacked vertically. Specifically, the transformer unit 3 is arranged below the busbar room 2, and the second unit 12 is arranged above the busbar room 2. The connection unit 4 is arranged to the side of the transformer unit 3. The first unit 11 is arranged above the connection unit 4.

[0015] As shown in FIG. 2 , the gas-insulated switchgear 101 of this embodiment includes a control box 70 , a cover 80 , a support frame 90 , and a base 100 .

[0016] The control box 70 houses operating devices for operating circuit breakers (described below) and the like (see FIG. 3 ) arranged in the second unit 12, the busbar room 2, and the transformer unit 3. The control box 70 is arranged on the front side (left side in FIG. 2 ) of the gas-insulated switchgear 101 in order to operate the operating devices, and has an openable / closable door on the front side. The cover 80 has an openable / closable cover structure that covers the line L as well as the current transformer CT and the cable head CHD.

[0017] The support frame 90 is a frame body that supports the power receiving unit 1, the busbar room 2, the transformer unit 3, the connection unit 4, and the operation box 70. The base 100 is a platform for adjusting the height of the gas-insulated switchgear 101 connected to the transformer 200.

[0018] 4 and 5, the power receiving and transforming equipment 300 includes a pair of gas-insulated switchgears 101, a pair of transformers 200, and a power supply and demand potential transformer (hereinafter referred to as "VCT") 400. One set of gas-insulated switchgears 101 and transformers 200 are connected to each other. One set of gas-insulated switchgears 101 and transformers 200 is provided as a normal device, and the other set of gas-insulated switchgears 101 and transformers 200 is provided as a standby device.

[0019] The first unit 11 and second unit 12 of the power receiving unit 1 and the transformer 200 are arranged in a line indicated by the dashed line in Fig. 5. The transformer 200 is connected to the gas-insulated switchgear 101 via the connection unit 4.

[0020] The VCT 400 is disposed between the second units 12 of the pair of gas-insulated switchgears 101. The VCT 400 is also connected to the pair of second units 12.

[0021] Next, the power receiving unit 1, the bus room 2, the transformer unit 3, and the connection unit 4 will be described in detail.

[0022] The power receiving unit 1 is a unit that opens and closes between a power receiving side bus BUS1 and a line L. The power receiving unit 1 has a first unit 11 and a second unit 12.

[0023] The first unit 11 includes a lightning arrester LA, a voltage detection device VD, a line-side earthing switch ES1, and a line-side disconnecting switch DS1.

[0024] A voltage detection device VD detects the voltage of a conductor connected to a cable head CHD. A lightning arrester LA is provided between the conductor and ground. A line-side earthing switch ES1 grounds the conductor. One end of a line-side disconnecting switch DS1 is connected to the line L via the cable head CHD. One end of a circuit breaker CB1 is connected to the other end of the line-side disconnecting switch DS1.

[0025] The first unit 11 also has a first unit container 20 that forms the outer shell of the first unit 11. The first unit container 20 has a main body 20a, a connecting pipe 20b, and inlet pipes 20c and 20d.

[0026] The main body 20a has a cylindrical shape and is arranged with its central axis facing up and down. The main body 20a accommodates a lightning arrester LA, a voltage detection device VD, a line-side earthing switch ES1, and a line-side disconnecting switch DS1.

[0027] The connecting pipe 20b is provided for connection to a second unit container 30, which will be described later. The connecting pipe 20b is formed short and extends in a direction perpendicular to the center of the main body 20a at the upper part of the outer circumferential surface of the main body 20a.

[0028] The lead-in pipes 20c and 20d are provided to lead the line L into the first unit container 20 of the first unit 11. A cable head CHD is attached to the lead-in pipe 20c. In addition to this description, the cable head CHD may be attached to the lead-in pipe 20d.

[0029] 1 and 5, the service pipes 20c and 20d are arranged on the side of the first unit 11, i.e., on the outer peripheral surface of the main body 20a, at positions that do not face the transformer 200. The service pipes 20c and 20d are arranged, for example, to face directions A and B, respectively, that are perpendicular to the direction in which the transformer 200 is arranged relative to the first unit 11 (the direction in which the dashed dotted line in FIG. 5 extends). The service pipes 20c and 20d are also arranged at positions that are opposite each other on the outer peripheral surface of the main body 20a.

[0030] The second unit 12 has a circuit breaker CB1 and circuit breaker inspection earthing switches ESO1 and ESO2. The circuit breaker inspection earthing switches ESO2 and ESO3 close during inspection of the circuit breaker CB1 to ground both ends of the circuit breaker CB1. Each of the circuit breaker CB1 and the circuit breaker inspection earthing switches ESO1 and ESO2 is operated by the above-mentioned operating device housed in the operation box 70.

[0031] The second unit 12 also has a second unit container 30 that forms the outer shell of the second unit 12. The second unit container 30 has a main body 30a, a connecting pipe 30b, and a communication pipe 30c.

[0032] The main body 30a has a cylindrical shape, its central axis faces the vertical direction, and is arranged adjacent to and horizontally aligned with the main body 20a of the first unit container 20. The main body 30a accommodates the circuit breaker CB1 and circuit breaker inspection earthing switches ESO1 and ESO2.

[0033] The connecting pipe 30b is provided for connection to the first unit container 20 described above. The connecting pipe 30b is formed short and extends in a direction perpendicular to the center of the main body 30a at the upper part of the outer circumferential surface of the main body 30a. The connecting pipes 20b, 30b are connected to each other to communicate the interiors of the main bodies 20a, 30a. The connecting pipe 30c is a conduit for communicating the main body 30a and the operation box 70.

[0034] The bus room 2 has a power receiving side bus BUS1, a transformer side bus BUS2, a bus side disconnector DS2, and a transformer side disconnector DS3. The bus side disconnector DS2 is provided between the power receiving side bus BUS1 and a circuit breaker CB1 in the second unit 12. The transformer side disconnector DS3 is provided between the transformer side bus BUS2 and a circuit breaker CB2 (described later) in the transformer unit 3. The power receiving side bus BUS1 is a bus that connects one end of the bus side disconnector DS2 to the input end of the VCT 400. The transformer side bus BUS2 is a bus that connects one end of the transformer side disconnector DS3 to the output end of the VCT 400. Each of the bus-side disconnector DS2 and the transformer-side disconnector DS3 is operated by the above-mentioned operating device housed in the operation box 70.

[0035] The bus room 2 also has a bus enclosure 40 that forms the outer shell of the bus room 2. The bus enclosure 40 has a main body 40a, a connection pipe 40b, and a connecting pipe 40c.

[0036] The main body 40a has a cylindrical shape, and its central axis faces the up-down direction and is disposed so as to coincide with the center of the main body 30a of the second unit container 30. The upper end of the main body 40a is joined to the lower end of the main body 30a. The main body 40a accommodates a portion of the power receiving side bus BUS1 and the transformer side bus BUS2, as well as a bus side disconnector DS2 and a transformer side disconnector DS3. The bus side disconnector DS2 and the transformer side disconnector DS3 are the first and second disconnectors, respectively, in the claims. Specific installation locations of the first and second disconnectors in the bus room 2 in the gas-insulated switchgear 101 of the present disclosure will be described later.

[0037] The connection pipe 40b is a pipe provided for connection to the VCT 400. The communication pipe 40c is a pipe for connecting the main body 40a and the operation box 70 to each other.

[0038] The transformer unit 3 switches between the transformer side bus BUS2 and the primary side of the transformer 200. The transformer unit 3 has a circuit breaker CB2 and circuit breaker inspection earthing switches ESO3 and ESO4.

[0039] One end of the circuit breaker CB2 is connected to the other end of the transformer-side disconnecting switch DS3. The circuit breaker inspection earthing switches ESO3 and ESO4 are closed during inspection of the circuit breaker CB2 to earth both ends of the circuit breaker CB2.

[0040] The transformer unit 3 also has a transformer unit container 50 that forms the outer shell of the transformer unit 3. The transformer unit container 50 has a main body 50a, a connecting pipe 50b, and a connecting pipe 50c.

[0041] The main body 50a has a cylindrical shape, and its central axis faces the vertical direction and is positioned so as to coincide with the center of the main body 40a of the busbar container 40. The upper end of the main body 50a is joined to the lower end of the main body 40a. The main body 50a houses a circuit breaker CB2 and circuit breaker inspection earthing switches ESO3 and ESO4. Each of the circuit breaker CB2 and circuit breaker inspection earthing switches ESO3 and ESO4 is operated by the above-mentioned operating device housed in the operation box 70.

[0042] The connection pipe 50b is a pipe provided for connection to the connection unit 4. The communication pipe 50c is a pipe for communicating between the main body 50a and the operation box 70.

[0043] The connection unit 4 has a bushing BS for connecting the transformer unit 3 to the transformer 200. The bushing BS is provided between one end of the circuit breaker CB2 and the transformer 200.

[0044] The connection unit 4 also has a connection unit container 60 that forms the outer shell of the connection unit 4. The connection unit container 60 has a cylindrical shape and is arranged so that its central axis faces the direction in which the first unit 11, the second unit 12, and the transformer 200 are aligned (see FIG. 5). One end of the connection unit container 60 is connected to the connection pipe 50b of the transformer unit container 50. As shown in FIG. 4, the other end of the connection unit container 60 is connected to the connection portion 201 of the transformer 200. A bushing BS is housed inside the connection unit container 60.

[0045] An insulating gas is sealed inside the first unit container 20, the second unit container 30, the bus container 40, the transformer unit container 50, and the connection unit container 60. The first unit container 20, the second unit container 30, the bus container 40, the transformer unit container 50, and the connection unit container 60 are isolated from one another to prevent the insulating gas from circulating. An insulating gas with a low environmental impact and low insulating performance is used as the insulating gas. Specifically, dry air, G-cube, nitrogen gas, etc. are used as the insulating gas.

[0046] In the gas-insulated switchgear 101 of this embodiment, the service pipes 20c, 20d are arranged at positions on the side surface of the first unit 11 that do not face the transformer 200. As a result, in this embodiment, the service pipes 20c, 20d do not obstruct connection of the transformer 200 to the gas-insulated switchgear 101, and the transformer 200 can be arranged close to the gas-insulated switchgear 101. Therefore, in this embodiment, the installation area of ​​the power receiving and substation equipment 300 can be reduced.

[0047] Furthermore, in this embodiment, the service pipes 20c and 20d are arranged so as to face in a direction perpendicular to the direction in which the transformer 200 is arranged relative to the first unit 11, and the service pipes 20c and 20d are arranged at positions facing each other on the side surface of the first unit 11, i.e., on the outer circumferential surface of the main body 20a. As a result, in this embodiment, either the service pipes 20c and 20d can be appropriately selected and used depending on the usage situation of the gas-insulated switchgear 101.

[0048] In addition, in this embodiment, the container forming the outer shell of the power receiving unit 1 is divided into two (plural) units: a first unit container 20 and a second unit container 30. As a result, in this embodiment, the devices constituting the power receiving unit 1 can be individually arranged in the divided first unit container 20 and second unit container 30 according to their functions, and a sufficient insulation distance between the devices can be ensured. Therefore, in this embodiment, an insulating gas with low insulation performance and low environmental load can be used.

[0049] Specifically, the power receiving unit 1 has a large number of devices such as a lightning arrester LA, a voltage detection device VD, a line-side earthing switch ES1, a line-side disconnecting switch DS1, a circuit breaker CB1, and circuit breaker inspection earthing switches ESO1 and ESO2. Therefore, in order to ensure the insulation of each device, conventional gas-insulated switchgears use SF ６ However, such insulating gases are generally greenhouse gases and have a high environmental impact.

[0050] In contrast, the insulating gas used in the gas-insulated switchgear 101 of the present disclosure has a low environmental load and low insulating performance. Therefore, when such an insulating gas is used in a conventional gas-insulated switchgear, it is difficult to arrange the above-mentioned devices in close proximity. As a result, when an insulating gas with a low environmental load and low insulating performance is used in a conventional gas-insulated switchgear, it is difficult to increase the size and complexity of the structure of the gas-insulated switchgear, unlike the gas-insulated switchgear 101 of the present disclosure.

[0051] Furthermore, in this embodiment, the lead-in pipes 20c, 20d are arranged on the side surface of the first unit container 20, i.e., on the outer peripheral surface of the main body 20a, so that the space above the connection unit 4 can be used for leading in the line L through the lead-in pipes 20c, 20d. As a result, in this embodiment, the limited space in which the gas-insulated switchgear 101 is installed can be effectively used. Furthermore, in the power receiving and substation equipment 300 of this embodiment, the transformer 200 can be arranged close to the gas-insulated switchgear 101. Therefore, the installation area of ​​the power receiving and substation equipment 300 can be reduced.

[0052] Here, an example of the internal configuration of the busbar chamber 2 in the gas-insulated switchgear 101 of the present disclosure will be specifically described with reference to FIGS. 6 and 7 . FIG. 6 is a diagram illustrating an example of the internal configuration of the busbar chamber 2 shown in FIG. 1 . FIG. 7 is a diagram illustrating the connection structure C shown in FIG. 6 . Note that FIG. 6 corresponds to a cross-sectional view of the busbar chamber 2 taken along a cross section perpendicular to the front-rear direction, but hatching has been omitted to simplify the drawing (the same applies to FIGS. 8 to 10 , which will be described later). Note that the position of the cross section in the front-rear direction corresponds to the position at which the W-phase busbar-side disconnector DS2W, transformer-side disconnector DS3W, etc., which will be described later, are cut. Also, in FIG. 7 , to simplify the drawing, the first and second movable-side electrodes provided for each phase are omitted, and only the holes through which the first and second movable-side electrodes are inserted are shown.

[0053] In the bus chamber 2 of the gas-insulated switchgear 101 of this embodiment, for example, devices for three phases, U-phase, V-phase, and W-phase, are provided inside the bus vessel 40. Specifically, as shown in Fig. 6 , a W-phase bus-side disconnector (first disconnector) DS2W and a W-phase transformer-side disconnector (second disconnector) DS3W are provided to face each other in the vertical direction (second direction).

[0054] Furthermore, within the bus room 2, V-phase and U-phase bus-side disconnectors (not shown) are provided in sequence from the bus-side disconnector DS2W along the front-to-rear direction (first direction), which is a direction perpendicular to the plane of Fig. 6. Similarly, within the bus room 2, V-phase and U-phase transformer-side disconnectors (not shown) are provided in sequence from the transformer-side disconnector DS3W along the front-to-rear direction, which is a direction perpendicular to the plane of Fig. 6. These V-phase and U-phase bus-side disconnectors and V-phase and U-phase transformer-side disconnectors are provided so as to face each other in the up-down direction, similar to the W-phase bus-side disconnector DS2W and the W-phase transformer-side disconnector DS3W.

[0055] 6, the bus-side disconnector DS2W includes a first fixed-side electrode 2WKD, a first movable-side electrode 2WMD, and a first movable-side electrode rod 2WMR. The first fixed-side electrode 2WKD and the first movable-side electrode 2WMD are supported by a first insulating spacer 40d and a first support member 40f, respectively. The first movable-side electrode rod 2WMR is supported by the first movable-side electrode 2WMD so as to be movable in the left-right direction (third direction).

[0056] In the bus-side disconnector DS2W, the right end of the first movable-side electrode 2WMR comes into contact with the first fixed-side electrode 2WKD, causing the bus-side disconnector DS2W to be in a closed (closed) state, as shown in Fig. 6. On the other hand, in the bus-side disconnector DS2W, the right end of the first movable-side electrode 2WMR moves leftward in Fig. 6 and separates from the first fixed-side electrode 2WKD, causing the bus-side disconnector DS2W to be in an open (open) state.

[0057] Similarly, the transformer-side disconnector DS3W includes a second fixed-side electrode 3WKD, a second movable-side electrode 3WMD, and a second movable-side electrode rod 3WMR. The second fixed-side electrode 3WKD and the second movable-side electrode 3WMD are supported by a second insulating spacer 40e and a second support member 40g, respectively. The second movable-side electrode rod 3WMR is supported by the second movable-side electrode 3WMD so as to be movable in the left-right direction.

[0058] In the transformer-side disconnector DS3W, the right end of the second movable-side electrode 3WMR comes into contact with the second fixed-side electrode 3WKD, thereby closing the transformer-side disconnector DS3W, as shown in Fig. 6. On the other hand, in the transformer-side disconnector DS3W, the right end of the second movable-side electrode 3WMR moves leftward in Fig. 6 and separates from the second fixed-side electrode 3WKD, thereby opening the transformer-side disconnector DS3W.

[0059] In addition, in the bus-side disconnector DS2W and the transformer-side disconnector DS3W, an operating mechanism (not shown) is connected to the left ends of the first and second movable electrodes 2WMR and 3WMR. This operating mechanism is also connected to the left ends of the first and second movable electrodes (not shown) of the V-phase and U-phase, respectively, and by operating the operating mechanism in response to the operation of the operating device, the bus-side disconnectors and transformer-side disconnectors for three phases can perform a circuit-closing operation or a circuit-opening operation all at once.

[0060] The first and second insulating spacers 40d, 40e are insulating members for leading the corresponding bus-side disconnector DS2W and transformer-side disconnector DS3W to the outside of the busbar room 2, and are provided to face each other in the second direction. Specifically, the first insulating spacer 40d is provided with a line having one end connected to the first fixed-side electrode 2WKD of the busbar-side disconnector DS2W and the other end connected to the circuit breaker CB1. The second insulating spacer 40e is provided with a line having one end connected to the second fixed-side electrode 3WKD of the transformer-side disconnector DS3W and the other end connected to the circuit breaker CB2.

[0061] Furthermore, as shown in FIG. 6, the first and second insulating spacers 40d, 40e are positioned away from the center in the left-right direction, and in the gas-insulated switchgear 101 of the present disclosure, the positions at which the first and second insulating spacers 40d, 40e are pulled out to the outside of the bus chamber 2 are positioned away from the center that is symmetrical in the left-right direction, thereby making it possible to make the gas-insulated switchgear 101 more compact (details will be described later).

[0062] Although these first and second insulating spacers 40d, 40e are provided for each of the three phases, the first and second insulating spacers for the three phases may each be provided integrally and attached to the bus container 40.

[0063] The first and second support members 40f, 40g are configured using, for example, insulators and are provided to face each other in the second direction. The first support member 40f supports the first movable electrode 2WMD in an electrically insulated state within the bus chamber 2 so that the first movable electrode 2WMD is aligned with the first fixed electrode 2WKD in the left-right direction within the bus chamber 2. The second support member 40g supports the second movable electrode 3WMD in an electrically insulated state within the bus chamber 2 so that the second movable electrode 3WMD is aligned with the second fixed electrode 3WKD in the left-right direction within the bus chamber 2.

[0064] Although these first and second support members 40f, 40g are provided for each of the three phases, the first and second support members for the three phases may each be provided integrally and installed within the busbar chamber 2.

[0065] As described above, in the bus chamber 2, the three-phase first movable-side electrodes and the three-phase second movable-side electrodes are located in the left half of the bus chamber 2, and the three-phase first fixed-side electrodes and the three-phase first fixed-side electrodes are located inside the bus chamber 2. As a result, in this embodiment, it is possible to easily reduce the vertical dimension of the gas-insulated switchgear 101.

[0066] In the bus room 2, three-phase bus conductors BDU, BDV, and BDW are provided at a vertically intermediate position between the bus-side disconnector DS2W and the transformer-side disconnector DS3W. Specifically, as shown in Fig. 7 , the bus conductors BDU, BDV, and BDW are each constructed using a straight metal conductor and are arranged along the vertical center line C1 so as to be equidistant from one another in the left-right direction of Fig. 6 . Furthermore, the bus conductors BDU, BDV, and BDW are each made of a metal conductor having the same dimensions in the front-to-rear direction, and are arranged along the front-to-rear direction in the bus room 2. One end and the other end of each of the bus conductors BDU, BDV, and BDW are connected to the power-receiving-side bus BUS1 and the transformer-side bus BUS2, respectively.

[0067] In the above description, one end and the other end of each of the bus conductors BDU, BDV, and BDW are connected to a bus bar. However, in the gas-insulated switchgear 101 of the present disclosure, either one end or the other end of each of the bus conductors BDU, BDV, and BDW may be connected to a bus bar, or in some cases, none of the ends may be connected to a bus bar.

[0068] Furthermore, in the gas-insulated switchgear 101 of the present disclosure, the connection structure C electrically connects each of the three-phase bus-side disconnectors to the corresponding bus conductors BDU, BDV, and BDW, and each of the three-phase transformer-side disconnectors to the corresponding bus conductors BDU, BDV, and BDW.

[0069] Specifically, as shown in Figure 7, the connection structure C includes a linear first connecting conductor C2U that connects the bus conductor BDU and the first movable side electrode 2UMD, a linear first connecting conductor C2V that connects the bus conductor BDV and the first movable side electrode 2VMD, and a linear first connecting conductor C2W that connects the bus conductor BDW and the first movable side electrode 2WMD.

[0070] Furthermore, as shown in Figure 7, the connection structure C includes a linear second connecting conductor C3U that connects the bus conductor BDU and the second movable side electrode 3UMD, a linear second connecting conductor C3V that connects the bus conductor BDV and the second movable side electrode 3VMD, and a linear second connecting conductor C3W that connects the bus conductor BDW and the second movable side electrode 3WMD.

[0071] 6, the first connecting conductors C2U, C2V, and C2W and the second connecting conductors C3U, C3V, and C3W are each provided along an oblique direction that is inclined at an angle within a predetermined angle range with respect to the vertical direction. Specifically, in order to maintain the insulation distances Z2 to Z5 (described below) at the necessary insulation distances and to minimize the dimension H1 (described below), it is desirable that the first connecting conductors C2U, C2V, and C2W and the second connecting conductors C3U, C3V, and C3W are each angled at an angle within the above-mentioned predetermined angle range, for example, within a range of 10° to 60°, with respect to the vertical direction.

[0072] In the connection structure C, among the three-phase first connecting conductors C2U, C2V, and C2W, the first connecting conductors for two phases, for example, the first connecting conductors C2V and C2W for the V and W phases, are made of members having the same shape. Furthermore, among the three-phase second connecting conductors C3U, C3V, and C3W, the second connecting conductors for two phases, for example, the second connecting conductors C3V and C3W for the V and W phases, are made of members having the same shape. As described above, among the first and second connecting conductors C2U, C2V, C2W and C3U, C3V, and C3W, the first and second connecting conductors C2V, C2W and C3V, C3W for two phases are made of members having the same shape. This makes it possible to reduce the number of parts of the gas-insulated switchgear 101, and facilitates maintenance and management of the gas-insulated switchgear 101.

[0073] 6 and 7, in connection structure C, of ​​the first and second connecting conductors C2U, C2V, C2W and C3U, C3V, C3W of the three phases, for example, the first and second connecting conductors C2U and C3U of the U phase as the first phase are provided on either side in the front-to-rear direction shown in Fig. 7. Furthermore, these first and second connecting conductors C2U and C3U have a longer dimension than the first and second connecting conductors C2V, C2W and C3V, C3W of the other two phases, i.e., the V phase and the W phase.

[0074] In addition, in connection structure C, as shown in Figure 6, the bus conductor BDU of the U phase as the first phase is located between the first fixed side electrode 2WKD and the second fixed side electrode 3WKD in the vertical direction.

[0075] In connection structure C, as shown in FIG. 6, within the bus chamber 2, the first connecting conductors C2V and C2W of the V and W phases, the second connecting conductors C3V and C3W of the V and W phases, and the bus conductors BDV and BDW of the V and W phases, which are adjacent in the fore-and-aft direction, are arranged so as to be mirror-symmetrical with respect to a plane perpendicular to the fore-and-aft direction (a plane along the center line C2 in FIG. 6).

[0076] In other words, the first connecting conductors C2V, C2W are arranged symmetrically with respect to a center line C2 that connects the center positions of the first and second support members 40f, 40g in the left-right direction, as shown in Fig. 6. The second connecting conductors C3V, C3W are arranged symmetrically with respect to the center line C2, as shown in Fig. 6. The bus conductors BDV, BDW are arranged symmetrically with respect to the center line C2, as shown in Fig. 6.

[0077] The gas-insulated switchgear 101 of this embodiment configured as described above includes the bus chamber 2, first and second insulating spacers 40d, 40e arranged at positions away from the center of the bus chamber 2 in the left-right direction and supporting the first and second fixed-side electrodes 2WKD, 3WKD of the bus-side disconnector DS2W and the transformer-side disconnector DS3W, respectively. The gas-insulated switchgear 101 also includes first and second support members 40f, 40g supporting the first and second movable-side electrodes 2WMD, 3WMD, respectively, so as to be aligned with the first and second fixed-side electrodes 2WKD, 3WKD in the left-right direction, and first and second linear connecting conductors C2W, C3W connecting the bus conductor BDW and the first and second movable-side electrodes 2WMD, 3WMD, respectively.

[0078] With the above-described configuration, in the gas-insulated switchgear 101 of this embodiment, the internal structure of the bus enclosure 40 and the positions of the first and second insulating spacers 40d, 40e can be made asymmetric in the left-right direction without increasing the dimensions in the front-rear and left-right directions. Therefore, in the gas-insulated switchgear 101 of this embodiment, a connection structure C can be used in which the required insulation distance between two phases is inclined obliquely with respect to the up-down direction within the bus enclosure 40.

[0079] As a result, in the gas-insulated switchgear 101 of this embodiment, in three phases, for example, the W phase, the bus conductor BDW can be connected to the first and second movable-side electrodes 2WMD, 3WMD of the bus-side disconnector DS2W and the transformer-side disconnector DS3W, respectively, using the first and second linear connecting conductors C2W, C3W configured to have the shortest dimensions, as shown in Fig. 6. Therefore, in this embodiment, the vertical dimension can be reduced, and a gas-insulated switchgear 101 that can be made compact can be configured. Furthermore, in this embodiment, since the gas-insulated switchgear 101 that can be made compact is used, a power receiving and substation facility 300 that can be made compact can be configured.

[0080] In the gas-insulated switchgear 101 of this embodiment, the first connecting conductors C2U, C2V, C2W and the second connecting conductors C3U, C3V, C3W are each provided along the oblique direction, which is a direction inclined at a predetermined angle with respect to the vertical direction. As a result, in this embodiment, the vertical dimension of the gas-insulated switchgear 101 can be reduced, and the gas-insulated switchgear 101 can be reliably made compact.

[0081] Furthermore, in the gas-insulated switchgear 101 of this embodiment, for example, the first connecting conductor C2U and second connecting conductor C3U of the U phase provided on either side in the front-to-rear direction have dimensions longer than those of the other two phases, i.e., the first connecting conductor C2V and second connecting conductor C3V of the V phase and the first connecting conductor C2W and second connecting conductor C3W of the W phase. As a result, in this embodiment, the first and second connecting conductors C2U, C2V, C2W and C3U, C3V, C3W for three phases can be compactly arranged in the bus chamber 2, making it easier to make the gas-insulated switchgear 101 more compact.

[0082] In the gas-insulated switchgear 101 of this embodiment, for example, the U-phase bus conductor BDU provided on either side in the front-to-rear direction is located between the first fixed-side electrode 2WKD and the second fixed-side electrode 3WKD in the up-down direction. This allows the three-phase bus conductors BDU, BDV, and BDW to be compactly arranged in the bus chamber 2, making it easier to make the gas-insulated switchgear 101 more compact.

[0083] 6, in the gas-insulated switchgear 101 of this embodiment, the V-phase and W-phase first connecting conductors C2V, C2W, the V-phase and W-phase second connecting conductors C3V, C3W, and the V-phase and W-phase bus conductors BDV, BDW, which are adjacent in the fore-and-aft direction, are arranged so as to be mirror-symmetrical with respect to a plane perpendicular to the fore-and-aft direction. This makes it possible to more reliably make the gas-insulated switchgear 101 compact.

[0084] 8 and 9, differences between the gas-insulated switchgear 101 of this embodiment and a gas-insulated switchgear of a comparative example will be specifically described. Fig. 8 is a diagram illustrating the height dimension of the busbar chamber 2 and the insulation distance inside the busbar chamber 2. Fig. 9 is a diagram illustrating the height dimension of the busbar chamber 102 of a gas-insulated switchgear according to the comparative example and the insulation distance inside the busbar chamber 102.

[0085] First, a bus room 102 of a conventional gas-insulated switchgear as a comparative example will be described with reference to Fig. 9. In Fig. 9, in a bus enclosure 140 constituting the bus room 102, three-phase bus-side disconnectors and three-phase transformer-side disconnectors are arranged facing each other in the vertical direction along the front-to-rear direction (the direction perpendicular to the plane of Fig. 9). In other words, as shown in Fig. 9, the W-phase bus-side disconnector D12W and transformer-side disconnector D13W are arranged on one side in the front-to-rear direction within the bus enclosure 140, and the V-phase and U-phase bus-side disconnectors and transformer-side disconnectors are arranged sequentially along the front-to-rear direction.

[0086] 9, insulating spacers 140d and 140e for leading the W-phase bus-side disconnector D12W and the transformer-side disconnector D13W to the outside are provided facing each other in the vertical direction in the bus enclosure 140. The movable electrode 12WMD of the bus-side disconnector D12W and the movable electrode 13WMD of the transformer-side disconnector D13W are fixed to the insulating spacers 140d and 140e.

[0087] In addition, the bus side disconnector D12W, like the bus side disconnector DS2W of this embodiment, has a fixed side electrode 12WKD and a movable side electrode rod 12WMR that is supported on the movable side electrode 12WMD so as to be movable in the left-right direction and is configured to be detachable from the fixed side electrode 12WKD.

[0088] Furthermore, like the transformer side disconnector DS3W of this embodiment, the transformer side disconnector D13W has a fixed side electrode 13WKD and a movable side electrode rod 13WMR that is supported on the movable side electrode 13WMD so as to be movable in the left-right direction and is configured to be detachable from the fixed side electrode 13WKD.

[0089] As in the present embodiment, these bus-side disconnectors D12W and transformer-side disconnectors D13W are configured so that the three-phase bus-side disconnectors and transformer-side disconnectors can perform closing or opening operations collectively by operating an operating mechanism not shown.

[0090] In addition, in the busbar room 102, similar to the busbar room 2, three-phase busbar conductors BDU, BDV, BDW, each using a straight metal conductor, are provided at a midpoint in the vertical direction between the busbar side disconnector D12W and the transformer side disconnector D13W, as illustrated in Figure 9.

[0091] In addition, in the bus chamber 102, the insulating spacers 140d, 140e are provided so as to coincide with the center position of the bus container 140 in the left-right direction, and these insulating spacers 140d, 140e are arranged symmetrically about the dashed dotted line C3 in Fig. 9 , unlike in this embodiment. In other words, in the bus chamber 102 of the comparative example, its internal structure and the insulating spacers 140d, 140e are configured to be symmetrical in the left-right direction, the front-rear direction, and the up-down direction. On the other hand, in the bus chamber 2 of this embodiment, its internal structure and the first and second insulating spacers 40d, 40e are configured to be symmetrical in the front-rear direction and the up-down direction, and are configured to be asymmetrical in the left-right direction.

[0092] Furthermore, in the busbar chamber 102, a connection structure CP connects the busbar-side disconnectors of each phase to the busbar conductors of each phase, and also connects the transformer-side disconnectors of each phase to the busbar conductors of each phase. Specifically, the connection structure CP includes first and second connecting conductors C12U and C13U of the U phase, first and second connecting conductors C12V and C13V of the V phase, and first and second connecting conductors C12W and C13W of the W phase.

[0093] 9, each of the first and second connecting conductors C12W and C13W is formed in a crank shape having a linear long portion parallel to the left-right direction and two linear short portions parallel to the up-down direction, which are provided continuously at one end and the other end of the long portion. One short portion of the first connecting conductor C12W is connected to the bus conductor BDW and the other short portion is connected to the fixed-side electrode 12WKD of the bus-side disconnector D12W, and one short portion of the second connecting conductor C13W is connected to the bus conductor BDW and the other short portion is connected to the fixed-side electrode 13WKD of the transformer-side disconnector D13W.

[0094] Like the first and second connecting conductors C12W and C13W, the first and second connecting conductors C12V and C13V are each formed in a crank shape having a linear longitudinal portion parallel to the left-right direction and two linear short portions parallel to the up-down direction, respectively, provided continuously at one end and the other end of the longitudinal portion. One short portion of the first connecting conductor C12V is connected to the bus conductor BDV and the other short portion is connected to a fixed electrode of a bus-side disconnecting switch (not shown). Meanwhile, one short portion of the second connecting conductor C13V is connected to the bus conductor BDV and the other short portion is connected to a fixed electrode of a transformer-side disconnecting switch (not shown). However, the left-right lengths of the longitudinal portions of the first and second connecting conductors C12V and C13V are shorter than the left-right lengths of the longitudinal portions of the first and second connecting conductors C12W and C13W, respectively.

[0095] The first and second connecting conductors C12U and C13U have linear longitudinal portions that are parallel to the vertical direction. One end of the longitudinal portion of the first connecting conductor C12U is connected to the bus conductor BDU and the other end is connected to a fixed electrode of a bus-side disconnecting switch (not shown), and one end of the longitudinal portion of the second connecting conductor C13U is connected to the bus conductor BDU and the other end is connected to a fixed electrode of a transformer-side disconnecting switch (not shown).

[0096] As described above, in the connection structure CP of the comparative example, unlike the connection structure C of this embodiment, the first and second connection conductors C12U, C12V, C12W, C13U, C13V, and C13W have different shapes and sizes for each phase, U phase, V phase, and W phase.

[0097] 9 , it was necessary to arrange the three-phase bus-side disconnectors, the three-phase bus conductors BDU, BDV, and BDW, and the three-phase transformer-side disconnectors while ensuring insulation distances Z11 to Z18 within the bus enclosure 140. Specifically, it was necessary to arrange the fixed electrodes of the bus-side disconnectors and the fixed electrodes of the transformer-side disconnectors against the inner wall surface of the bus enclosure 140 while ensuring insulation distances Z11 and Z18, respectively, as the insulation distances to ground within the bus enclosure 140.

[0098] In the comparative example, it was necessary to ensure an insulation distance Z12 between poles, for example, between the W-phase first connecting conductor C12W and the movable electrode of the V-phase bus-side disconnector. It was also necessary to ensure an insulation distance Z17 between poles, for example, between the W-phase second connecting conductor C13W and the movable electrode of the V-phase transformer-side disconnector.

[0099] In the comparative example, for example, it was necessary to arrange the W-phase first connecting conductor C12W and the V-phase bus conductor BDV while ensuring an insulation distance Z13 as the relative insulation distance. Also, for example, it was necessary to arrange the W-phase first connecting conductor C12W and the U-phase bus conductor BDU while ensuring an insulation distance Z14 as the interphase insulation distance.

[0100] In the comparative example, for example, it was necessary to arrange the W-phase second connecting conductor C13W and the V-phase bus conductor BDV while ensuring an insulation distance Z15 as the relative insulation distance. Also, for example, it was necessary to arrange the W-phase second connecting conductor C13W and the U-phase bus conductor BDU while ensuring an insulation distance Z16 as the interphase insulation distance.

[0101] As described above, in the comparative example, it was necessary to arrange the three-phase bus-side disconnectors, the three-phase bus conductors BDU, BDV, BDW, and the three-phase transformer-side disconnectors in the vertical direction within the bus enclosure 140, taking into consideration the insulation distances Z12 to Z17 equivalent to six layers as the necessary insulation distance between two phases other than the insulation distances Z11 and Z18 (insulation distance to ground) determined by the rated voltage.

[0102] In contrast, the bus enclosure 40 of this embodiment uses a connection structure C in which the required insulation distance between two phases is inclined with respect to the vertical direction, as shown in Fig. 8. Specifically, within the bus enclosure 40, it is necessary to ensure insulation distances Z1 and Z6 as insulation distances to ground, and to arrange the fixed electrodes of the bus-side disconnector and the transformer-side disconnector against the inner wall surface of the bus enclosure 40. Note that if the rated voltage of the gas-insulated switchgear 101 is the same as that of the comparative example, these insulation distances Z1 and Z6 have the same values ​​as the insulation distances Z11 and Z18.

[0103] In this embodiment, for example, the first U-phase connecting conductor C2U and the first fixed-side electrode 2WKD of the W-phase bus-side disconnector DS2W must be arranged with an insulation distance Z2 between the poles. Also, for example, the second U-phase connecting conductor C3U and the second fixed-side electrode 3WKD of the W-phase transformer-side disconnector DS3W must be arranged with an insulation distance Z5 between the poles.

[0104] In this embodiment, for example, the U-phase first connecting conductor C2U and the V-phase bus conductor BDV must be arranged with an insulation distance Z3, which is the relative insulation distance. Also, for example, the U-phase second connecting conductor C3U and the V-phase bus conductor BDV must be arranged with an insulation distance Z4, which is the interphase insulation distance.

[0105] As described above, in this embodiment, the three-phase bus-side disconnectors, the three-phase bus conductors BDU, BDV, and BDW, and the three-phase transformer-side disconnectors may be arranged in consideration of the insulation distances Z2 to Z5 for four layers as the necessary insulation distance between two phases other than the insulation distances Z1 and Z6 (insulation distance to ground) determined by the rated voltage in the vertical direction inside the bus enclosure 40. As a result, in this embodiment, the vertical (height) dimension can be made smaller than in the comparative example.

[0106] Specifically, in this embodiment, the height dimension of the busbar chamber 2, indicated by H1 in Fig. 8, can be reduced by approximately 7 / 11 of the height dimension of the busbar chamber 102 of the comparative example, indicated by H2 in Fig. 9. As a result, in the comparative example, depending on the rated voltage of the gas-insulated switchgear, the height dimension of the gas-insulated switchgear, including the height dimension H2, may exceed the height limit when transported by a normal truck, which may require, for example, the use of a special vehicle such as a low-floor trailer or the disassembled transportation of the gas-insulated switchgear.

[0107] In contrast, in the present embodiment, by reducing the height of the busbar chamber 2, the overall height of the gas-insulated switchgear 101 can be reduced, and as a result, the overall height of the gas-insulated switchgear 101 can be set to or below the height limit, and the gas-insulated switchgear 101 incorporating the busbar chamber 2 can be transported without using the special vehicle or disassembly for transportation. As a result, the present embodiment can achieve the effect of simplifying the transportation of the gas-insulated switchgear 101 including the busbar chamber 2. Specifically, in the present embodiment, the gas-insulated switchgear 101 can be transported in an assembled state, so that on-site installation is possible after the completion of the shipping inspection process. This makes it possible to omit disassembly, on-site assembly, on-site gas treatment, on-site inspection, etc., and provides significant advantages in terms of transportation, construction period, quality, etc.

[0108] [Modification] A modification of the present disclosure will be specifically described with reference to Fig. 10. Fig. 10 is a diagram illustrating an example of the internal configuration of the bus chamber 2 of a gas-insulated switchgear 101 according to a modification. For ease of explanation, members having the same functions as those described in the above embodiment are denoted by the same reference numerals, and their description will not be repeated.

[0109] The main difference between the modified example and the first embodiment is that the phase order of the U-phase and W-phase in the left-right direction within the busbar chamber 2 is reversed.

[0110] As shown in Figure 10, in the bus room 2 of this modified example, the U-phase bus-side disconnector DS2U and the U-phase transformer-side disconnector DS3U are arranged on the front side in the front-to-rear direction, facing each other in the up-down direction. In addition, in this modified example, V-phase and W-phase bus-side disconnectors (not shown) are arranged in succession along the front-to-rear direction from the bus-side disconnector DS2U. Similarly, in this modified example, V-phase and W-phase transformer-side disconnectors (not shown) are arranged in succession along the front-to-rear direction from the transformer-side disconnector DS3U. These V-phase and W-phase bus-side disconnectors and V-phase and W-phase transformer-side disconnectors are arranged in succession along the front-to-rear direction, similar to the U-phase bus-side disconnector DS2U and the U-phase transformer-side disconnector DS3U.

[0111] 10, the bus-side disconnector DS2U includes a first fixed-side electrode 2UKD, a first movable-side electrode 2UMD, and a first movable-side electrode rod 2UMR. The first fixed-side electrode 2UKD and the first movable-side electrode 2UMD are supported by a first insulating spacer 40d and a first support member 40f, respectively. The first movable-side electrode rod 2UMR is supported by the first movable-side electrode 2UMD so as to be movable in the left-right direction.

[0112] In the bus-side disconnector DS2U, the right end of the first movable-side electrode 2UMR comes into contact with the first fixed-side electrode 2UKD, causing the bus-side disconnector DS2U to be in a closed (closed) state, as shown in Fig. 10. On the other hand, in the bus-side disconnector DS2U, the right end of the first movable-side electrode 2UMR moves leftward in Fig. 10 and separates from the first fixed-side electrode 2UKD, causing the bus-side disconnector DS2U to be in an open (open) state.

[0113] Similarly, the transformer-side disconnector DS3U includes a second fixed-side electrode 3UKD, a second movable-side electrode 3UMD, and a second movable-side electrode rod 3UMR. The second fixed-side electrode 3UKD and the second movable-side electrode 3UMD are supported by a second insulating spacer 40e and a second support member 40g, respectively. The second movable-side electrode rod 3UMR is supported by the second movable-side electrode 3UMD so as to be movable in the left-right direction.

[0114] In the transformer-side disconnector DS3U, the right end of the second movable-side electrode 3UMR comes into contact with the second fixed-side electrode 3UKD, thereby closing the transformer-side disconnector DS3U, as shown in Fig. 10. On the other hand, in the transformer-side disconnector DS3U, the right end of the second movable-side electrode 3UMR moves leftward in Fig. 10 and separates from the second fixed-side electrode 3UKD, thereby opening the transformer-side disconnector DS3U.

[0115] In addition, in the bus-side disconnector DS2U and the transformer-side disconnector DS3U, an operating mechanism (not shown) is connected to the left ends of the first and second movable electrodes 2UMR and 3UMR. This operating mechanism is also connected to the left ends of the first and second movable electrodes (not shown) of the V-phase and W-phase, respectively, and by operating the operating mechanism in response to the operation of the operating device, the bus-side disconnectors and transformer-side disconnectors for three phases can perform a circuit closing operation or a circuit opening operation collectively.

[0116] In addition, in the modified example, the three-phase bus conductors BDU, BDV, and BDW are provided at an intermediate position between the bus-side disconnector DS2U and the transformer-side disconnector DS3U in the vertical direction.

[0117] Furthermore, in the connection structure C of the modified example, among the three-phase first connecting conductors C2U, C2V, and C2W, the first connecting conductors for two phases, for example, the first connecting conductors C2U and C2V for the U and V phases, are identical to each other. Furthermore, among the three-phase second connecting conductors C3U, C3V, and C3W, the second connecting conductors for two phases, for example, the second connecting conductors C3U and C3V for the U and V phases, are identical to each other. As such, among the first and second connecting conductors C2U, C2V, C2W and C3U, C3V, C3W, the first and second connecting conductors C2U, C2V and C3U, C3V for two phases are identical to each other. Therefore, the number of parts of the gas-insulated switchgear 101 can be reduced, and maintenance of the gas-insulated switchgear 101 can be facilitated.

[0118] 10, in the modified connection structure C, among the first and second connecting conductors C2U, C2V, C2W and C3U, C3V, C3W of the three phases, for example, the first and second connecting conductors C2W and C3W of the W phase as the first phase are provided on either side in the front-to-rear direction. Furthermore, these first and second connecting conductors C2W and C3W are formed larger so as to have longer dimensions than the first and second connecting conductors C2U, C2V and C3U, C3V of the other two phases, i.e., the U phase and the V phase.

[0119] Furthermore, in the modified connection structure C, as shown in Figure 10, the W-phase bus conductor BDW as the first phase is located between the first fixed side electrode 2UKD and the second fixed side electrode 3UKD in the vertical direction.

[0120] Furthermore, in the modified connection structure C, as shown in Figure 10, within the busbar chamber 2, the first connecting conductors C2U and C2V of the U and V phases that are adjacent in the front-to-back direction, the second connecting conductors C3U and C3V of the U and V phases, and the busbar conductors BDU and BDV of the U and V phases are each arranged symmetrically in the left-to-right direction.

[0121] In other words, the first connecting conductors C2U and C2V are arranged symmetrically with respect to a center line connecting the left-right centers of the first and second support members 40f and 40g, as shown in Fig. 6. Similarly, the second connecting conductors C3U and C3V are arranged symmetrically with respect to the center line. Similarly, the bus conductors BDU and BDV are arranged symmetrically with respect to the center line.

[0122] With the above configuration, this modification provides the same effects as the above embodiment.

[0123] In the above explanation, a case where a cable head CHD is connected to the inlet pipes 20c and 20d is described, but the present disclosure is not limited to this. For example, a configuration in which a power receiving bushing is connected to the inlet pipes 20c and 20d instead of the cable head CHD may also be used.

[0124] [Summary] In order to solve the above-described problems, a gas-insulated switchgear according to a first aspect of the present disclosure includes: a bus room; first disconnectors of each phase provided in the bus room along a first direction; second disconnectors of each phase provided in the bus room along the first direction, the second disconnectors of each phase provided in the bus room so as to face the first disconnectors of each phase in a second direction perpendicular to the first direction; and bus conductors of each phase provided at intermediate positions between the first disconnectors and the second disconnectors of each phase in the second direction. a three-phase integrated gas-insulated switchgear, wherein each of the first disconnectors has a first fixed-side electrode, a first movable-side electrode, and a first movable-side electrode rod that is movably supported by the first movable-side electrode and can be moved toward and away from the first fixed-side electrode from a third direction perpendicular to the first direction and the second direction; and each of the second disconnectors has a second fixed-side electrode, a second movable-side electrode, and a second movable-side electrode rod that is movably supported by the second movable-side electrode and can be moved toward and away from the second fixed-side electrode from the third direction; a first insulating spacer for each phase that is arranged at a position away from the center of the busbar chamber in the third direction and that supports the first fixed-side electrode to lead out the first fixed-side electrode to the outside of the busbar chamber; a second insulating spacer for each phase that is arranged opposite the first insulating spacer in the second direction and that supports the second fixed-side electrode to lead out the second fixed-side electrode to the outside of the busbar chamber; a first support member for each phase that supports the first movable-side electrode of each phase so that the first movable-side electrode of each phase is aligned with the first fixed-side electrode of each phase in the third direction; a second support member for each phase that is arranged opposite the first support member in the second direction and that supports the second movable-side electrode of each phase so that the second movable-side electrode of each phase is aligned with the second fixed-side electrode of each phase in the third direction; a linear first connecting conductor for each phase that connects the busbar conductor and the first movable-side electrode; and a linear second connecting conductor for each phase that connects the busbar conductor and the second movable-side electrode.

[0125] According to the above configuration, it is possible to configure a gas-insulated switchgear that can be made compact.

[0126] A second aspect of the gas-insulated switchgear may be the gas-insulated switchgear of the first aspect, wherein the first connecting conductor and the second connecting conductor are each arranged along an oblique direction that is inclined at a predetermined angle with respect to the second direction.

[0127] According to the above configuration, the dimension of the gas-insulated switchgear in the second direction can be reduced, and the gas-insulated switchgear can be reliably made compact.

[0128] A gas-insulated switchgear of a third aspect may be the gas-insulated switchgear of the first or second aspect, wherein the first connecting conductors for two phases among the three-phase first connecting conductors are members of the same shape, and the second connecting conductors for two phases among the three-phase second connecting conductors are members of the same shape.

[0129] According to the above configuration, the number of parts of the gas-insulated switchgear can be reduced.

[0130] A fourth aspect of the gas-insulated switchgear may be the gas-insulated switchgear of the third aspect, wherein the first connecting conductor of a phase different from the two phases has a dimension longer than the first connecting conductor of the two phases, and the second connecting conductor of a phase different from the two phases has a dimension longer than the second connecting conductor of the two phases.

[0131] According to the above configuration, the first and second connecting conductors for three phases can be arranged compactly in the busbar chamber, and the gas-insulated switchgear can be more easily made compact.

[0132] A fourth aspect of the gas-insulated switchgear is such that, in the gas-insulated switchgear of the fourth aspect, the bus conductor of a phase different from the two phases may be located between the first fixed-side electrode and the second fixed-side electrode in the second direction.

[0133] According to the above configuration, the bus conductors for three phases can be arranged compactly, and the gas-insulated switchgear can be made more compact more easily.

[0134] A fifth aspect of the gas-insulated switchgear is the gas-insulated switchgear of any one of the third to fifth aspects, wherein the first connecting conductors of the two phases, the second connecting conductors of the two phases, and the bus conductors of the two phases may be arranged in mirror symmetry with respect to a plane perpendicular to the first direction.

[0135] According to the above configuration, in the busbar room, the first and second connecting conductors for two of the three phases and the busbar conductors for those two phases are arranged so as to be mirror-symmetrical with respect to a plane perpendicular to the first direction, thereby making it possible to more reliably make the gas-insulated switchgear compact.

[0136] A sixth aspect of the power receiving and transforming equipment of the present disclosure includes a gas-insulated switchgear according to any one of the first to sixth aspects, a transformer connected to the gas-insulated switchgear, and an electric power supply and demand instrument transformer connected to the bus conductor.

[0137] According to the above configuration, it is possible to configure a power receiving and transforming facility that can be made compact.

[0138] The present disclosure is not limited to the above-described embodiments and modifications, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in the embodiments and modifications are also included in the technical scope of the present disclosure.

[0139] 101 Gas insulated switchgear 2 Bus room DS2W, DS2U Bus side disconnecting switch (first disconnecting switch) 2WKD, 2UKD First fixed side electrode 2WMD, 2UMD First movable side electrode 2WMR, 2UMR First movable side electrode rod DS3W, DS3U Transformer side disconnecting switch (second disconnecting switch) 3WKD, 3UKD Second fixed side electrode 3WMD, 3UMD Second movable side electrode 3WMR, 3UMR Second movable side electrode rod 40d First insulating spacer 40e Second insulating spacer 40f First support member 40g Second support member BDU, BDV, BDW Bus conductor C2U, C2V, C2W First connecting conductor C3U, C3V, C3W Second connecting conductor 200 Transformer 300 Power receiving and transforming equipment 400 Power supply and demand instrument transformer

Claims

1. A three-phase integrated gas-insulated switchgear comprising: a busbar room; a first disconnector of each phase provided within the busbar room along a first direction; a second disconnector of each phase provided within the busbar room along the first direction, the second disconnector of each phase provided within the busbar room so as to face the first disconnector of each phase in a second direction perpendicular to the first direction; and a busbar conductor of each phase provided at an intermediate position between the first disconnector of each phase and the second disconnector of each phase in the second direction, wherein each of the first disconnectors has a first fixed side electrode, a first movable side electrode, and a first movable side electrode rod movably supported by the first movable side electrode and capable of approaching and retracting from the first fixed side electrode from a third direction perpendicular to the first direction and the second direction; Each of the second disconnectors has a second fixed-side electrode, a second movable-side electrode, and a second movable-side electrode rod movably supported by the second movable-side electrode and capable of approaching and separating from the second fixed-side electrode in the third direction; a first insulating spacer of each phase that is arranged at a position away from the center of the busbar chamber in the third direction and supports the first fixed-side electrode to lead out the first fixed-side electrode to the outside of the busbar chamber; a second insulating spacer of each phase that is provided to face the first insulating spacer in the second direction and supports the second fixed-side electrode to lead out the second fixed-side electrode to the outside of the busbar chamber; a first support member of each phase that supports the first movable-side electrode so that the first movable-side electrode of each phase is aligned with the first fixed-side electrode of each phase in the third direction; a second support member for each phase that is arranged to face the first support member in the second direction and supports the second movable side electrode of each phase so that the second movable side electrode of each phase is aligned with the second fixed side electrode of each phase in the third direction; a linear first connecting conductor for each phase that connects the bus conductor and the first movable side electrode; and a linear second connecting conductor for each phase that connects the bus conductor and the second movable side electrode.

2. A gas-insulated switchgear as described in claim 1, characterized in that the first connecting conductor and the second connecting conductor are each arranged along an oblique direction that is inclined at a predetermined angle with respect to the second direction.

3. The gas-insulated switchgear according to claim 1, characterized in that the first connecting conductors for two of the three phases are members of the same shape, and the second connecting conductors for two of the three phases are members of the same shape.

4. The gas-insulated switchgear according to claim 3, characterized in that the first connecting conductor of a phase different from the two phases has a longer dimension than the first connecting conductor of the two phases, and the second connecting conductor of a phase different from the two phases has a longer dimension than the second connecting conductor of the two phases.

5. A gas-insulated switchgear according to claim 4, wherein the bus conductor of a phase different from the two phases is located between the first fixed-side electrode and the second fixed-side electrode in the second direction.

6. A gas-insulated switchgear as claimed in any one of claims 3 to 5, wherein the first connecting conductors of the two phases, the second connecting conductors of the two phases, and the bus conductors of the two phases are arranged so as to be mirror symmetrical with respect to a plane perpendicular to the first direction.

7. A substation facility comprising: the gas-insulated switchgear according to claim 1; a transformer connected to said gas-insulated switchgear; and an electric power supply and demand instrument transformer connected to said bus conductor.

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