Gas-insulated switchgear and power receiving and transforming 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

Technical Field

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

Background Art

[0002] Generally, power receiving and transforming equipment is provided in facilities, buildings, etc. In such power receiving and transforming equipment, gas-insulated switchgear that is small and has a small installation area is preferably used.

Prior Art Documents

Patent Documents

[0003]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In gas-insulated switchgear, there is room for improvement in its compactification.

[0005] The present disclosure has been made in view of the above problems, and an object thereof is to provide a gas-insulated switchgear and power receiving and transforming equipment capable of achieving compactification.

Means for Solving the Problems

[0006] To solve the above problems, a gas-insulated switchgear according to one aspect of the present disclosure comprises: a busbar chamber; first disconnectors for each phase provided in the busbar chamber along a first direction; second disconnectors for each phase provided in the busbar chamber along a first direction, wherein the second disconnectors for each phase are provided in the busbar chamber so as to face each other in a second direction perpendicular to the first direction; and busbar conductors for each phase provided at an intermediate position between the first disconnectors and the second disconnectors for each phase in the second direction. Furthermore, in a three-phase integrated gas-insulated switchgear, each of the first disconnectors has a first fixed electrode, a first movable electrode, and a first movable electrode rod that is movably supported by the first movable electrode and can move toward and toward the first fixed electrode from a third direction perpendicular to the first and second directions, and each of the second disconnectors has a second fixed electrode, a second movable electrode, and a second movable electrode rod that is movably supported by the second movable electrode and can move toward and toward the second fixed electrode from a third direction, In the third direction, each phase has a first insulating spacer positioned away from the center of the bus chamber and supporting the first fixed electrode and drawing the first fixed electrode out of the bus chamber; in the second direction, each phase has a second insulating spacer positioned opposite to the first insulating spacer and supporting the second fixed electrode and drawing the second fixed electrode out of the bus chamber; each phase has a first support member that supports the first movable electrode so that the first movable electrode of each phase is aligned with the first fixed electrode of each phase in the third direction; each phase has a second support member positioned opposite to the first support member in the second direction and supporting the second movable electrode so that the second movable electrode of each phase is aligned with the second fixed electrode of each phase in the third direction; each phase has a linear first connecting conductor that connects the bus conductor and the first movable electrode; and each phase has a linear second connecting conductor that connects the bus conductor and the second movable electrode.

[0007] Furthermore, the power receiving and transforming equipment relating to one aspect of this disclosure comprises the gas-insulated switchgear, a transformer connected to the gas-insulated switchgear, and a power supply and demand metering transformer connected to the busbar conductor. [Effects of the Invention]

[0008] According to one aspect of this disclosure, it is possible to provide a gas-insulated switchgear and power receiving and transforming equipment that can be made more compact. [Brief explanation of the drawing]

[0009] [Figure 1] A perspective view showing the external configuration of a gas-insulated switchgear according to one embodiment of this disclosure. [Figure 2] This is a side view showing the external configuration of the gas-insulated switchgear described above. [Figure 3] This is a single-line diagram showing the circuit configuration of the gas-insulated switchgear described above. [Figure 4] This is a side view showing the external configuration of the power receiving and transforming equipment, including the gas-insulated switchgear described above. [Figure 5] This is a plan view showing the external configuration of the above-mentioned power receiving and transforming equipment. [Figure 6] Figure 1 illustrates an example of the internal configuration of the busbar chamber. [Figure 7] This diagram illustrates the connection structure shown in Figure 6. [Figure 8] This diagram illustrates the height dimension of the busbar chamber and the insulation distance inside the busbar chamber. [Figure 9] This diagram illustrates the height dimension of the busbar chamber and the insulation distance inside the busbar chamber of a gas-insulated switchgear according to a comparative example. [Figure 10] This diagram illustrates an example of the internal configuration of the busbar chamber of a gas-insulated switchgear according to a modified example. [Modes for carrying out the invention]

[0010] [One Embodiment] An embodiment of this disclosure will be described in detail below. In the following description, an example will be given of the application of the three-phase integrated gas-insulated switchgear 101 of this disclosure to power receiving and transforming equipment 300 installed in a substation or the like.

[0011] FIG. 1 is a perspective view showing the external configuration of the 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 connection diagram showing the circuit configuration of the gas-insulated switchgear 101. FIG. 4 is a side view showing the external configuration of the power receiving and transforming equipment 300 including the gas-insulated switchgear 101. FIG. 5 is a plan view showing the external configuration of the power receiving and transforming equipment 300.

[0012] In the following description, as shown by the double-headed arrows in FIG. 1, the vertical direction, the front-rear direction, and the left-right direction of the gas-insulated switchgear 101 are defined. Also, the first direction, the second direction, and the third direction are the front-rear direction, the vertical direction, and the left-right direction, respectively. Further, the vertical direction (second direction) indicates the height direction with respect to the installation surface of the gas-insulated switchgear 101.

[0013] As shown in FIGS. 1 to 3, the gas-insulated switchgear 101 of the present embodiment includes a current transformer CT, a cable head CHD, a power receiving unit 1, a busbar chamber 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. The end of the cable of the line L is connected to the cable head CHD.

[0014] The second unit 12, the busbar chamber 2, and the transformer unit 3 are arranged so as to be stacked in the vertical direction. Specifically, the transformer unit 3 is arranged below the busbar chamber 2, and the second unit 12 is arranged above the busbar chamber 2. The connection unit 4 is arranged on 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 the present embodiment includes an operation box 70, a cover 80, a support frame 90, and a base 100.

[0016] The operating box 70 houses an operating device for operating a circuit breaker and the like (see Fig. 3) arranged in the second unit 12, the busbar chamber 2, and the transformer unit 3. The operating box 70 is arranged on the front side (the left side in Fig. 2) of the gas-insulated switchgear 101 to operate the operating device, and has a door that can be opened and closed on the front side. The cover 80 is an openable cover structure that covers the current transformer CT and the cable head CHD together with the line L.

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

[0018] As shown in Figs. 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 voltage transformer for electric power supply and demand meters (hereinafter referred to as "VCT") 400. A set of gas-insulated switchgear 101 and transformer 200 are connected to each other. One set of gas-insulated switchgear 101 and transformer 200 is provided as a normal device, and the other set of gas-insulated switchgear 101 and transformer 200 is provided as a standby device.

[0019] The first unit 11 and the second unit 12 of the power receiving unit 1 and the transformer 200 are arranged so as to be aligned on a straight line indicated by a one-dot chain line in Fig. 5. Also, the transformer 200 is connected to the gas-insulated switchgear 101 via the connection unit 4.

[0020] The VCT 400 is arranged between the second units 12 in the pair of gas-insulated switchgears 101. Also, the VCT 400 is connected to the pair of second units 12.

[0021] Subsequently, the power receiving unit 1, the busbar chamber 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 the connection between the power receiving bus BUS1 and the line L. The power receiving unit 1 has a first unit 11 and a second unit 12.

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

[0024] The voltage detection device VD detects the voltage of the conductor connected to the cable head CHD. The surge arrester LA is installed between the conductor and the ground. The line-side grounding switch ES1 grounds the conductor. One end of the line-side disconnector DS1 is connected to the line L via the cable head CHD. One end of the circuit breaker CB1 is connected to the other end of the line-side disconnector DS1.

[0025] Furthermore, the first unit 11 has a first unit container 20 that constitutes the outer casing 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 is cylindrical in shape, and its central axis is oriented vertically. Inside the main body 20a are a surge arrester LA, a voltage detection device VD, a line-side grounding switch ES1, and a line-side disconnector DS1.

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

[0028] The service entrance pipes 20c and 20d are provided to draw the track L into the first unit container 20 of the first unit 11. A cable head CHD is attached to the service entrance pipe 20c. In addition to this description, the cable head CHD may also be attached to the service entrance pipe 20d.

[0029] As shown in Figures 1 and 5, the service entrance pipes 20c and 20d are positioned on the side of the first unit 11, i.e., on the outer circumferential surface of the main body 20a, in a position that does not face the transformer 200. For example, the service entrance pipes 20c and 20d are positioned so as to face directions A and B, respectively, perpendicular to the direction in which the transformer 200 is positioned relative to the first unit 11 (the direction in which the dashed line extends in Figure 5). Furthermore, the service entrance pipes 20c and 20d are positioned on opposite sides of the outer circumferential surface of the main body 20a.

[0030] The second unit 12 includes a circuit breaker CB1 and grounding switches ESO1 and ESO2 for circuit breaker inspection. The grounding switches ESO2 and ESO3 are closed when the circuit breaker CB1 is being inspected to ground both ends of the circuit breaker CB1. Each of these circuit breakers CB1 and the grounding switches ESO1 and ESO2 are operated by the controls housed in the control box 70.

[0031] Furthermore, the second unit 12 has a second unit container 30 that constitutes the outer casing of the second unit 12. The second unit container 30 has a main body 30a, a connecting pipe 30b, and a connecting pipe 30c.

[0032] The main body 30a is cylindrical in shape, with its central axis oriented vertically, and is positioned close to the main body 20a of the first unit container 20 so as to be horizontally aligned with it. Inside the main body 30a are the circuit breaker CB1 and the circuit breaker inspection grounding 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 on the upper part of the outer circumferential surface of the main body 30a, extending in a direction perpendicular to the center of the main body 30a. The connecting pipes 20b and 30b connect to each other, thereby creating communication between the interiors of the main body 20a and 30a. The connecting pipe 30c is a conduit for connecting the main body 30a and the control box 70.

[0034] Busbar room 2 includes a power receiving busbar BUS1, a transformer-side busbar BUS2, a busbar-side disconnector DS2, and a transformer-side disconnector DS3. Busbar-side disconnector DS2 is installed between power receiving busbar BUS1 and circuit breaker CB1 in the second unit 12. Transformer-side disconnector DS3 is installed between transformer-side busbar BUS2 and circuit breaker CB2 in the transformer unit 3, which will be described later. Power receiving busbar BUS1 is a busbar that connects one end of busbar-side disconnector DS2 to the input terminal of VCT400. Transformer-side busbar BUS2 is a busbar that connects one end of transformer-side disconnector DS3 to the output terminal of VCT400. Each of these busbar-side disconnector DS2 and transformer-side disconnector DS3 is operated by the control device housed in the control box 70.

[0035] Furthermore, the busbar chamber 2 has a busbar container 40 that constitutes the outer casing of the busbar chamber 2. The busbar container 40 has a main body 40a, a connecting pipe 40b, and a connecting pipe 40c.

[0036] The main body 40a is cylindrical in shape, with its central axis oriented vertically and positioned 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. Inside the main body 40a are a portion of the receiving busbar BUS1 and the transformer busbar BUS2, as well as the busbar-side disconnector DS2 and the transformer-side disconnector DS3. The busbar-side disconnector DS2 and the transformer-side disconnector DS3 are the first and second disconnectors, respectively, as defined in the claims. The specific installation locations of the first and second disconnectors, etc., in the busbar chamber 2 of the gas-insulated switchgear 101 of this disclosure will be described later.

[0037] The connecting pipe 40b is a conduit provided for connection to the VCT400. The connecting pipe 40c is a conduit for connecting the main body 40a and the control box 70.

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

[0039] Circuit breaker CB2 has one end connected to the other end of transformer-side disconnector DS3. Circuit breaker inspection grounding switches ESO3 and ESO4 are closed when circuit breaker CB2 is being inspected to ground both ends of circuit breaker CB2.

[0040] Furthermore, the transformer unit 3 has a transformer unit container 50 that constitutes the outer casing 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 is cylindrical in shape, with its central axis oriented vertically and positioned 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. Inside the main body 50a are the circuit breaker CB2 and the circuit breaker inspection grounding switches ESO3 and ESO4. Each of these circuit breakers CB2 and circuit breaker inspection grounding switches ESO3 and ESO4 is operated by the control device housed in the control box 70.

[0042] The connecting pipe 50b is a conduit provided for connecting to the connection unit 4. The connecting pipe 50c is a conduit for connecting the main body 50a and the control 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] Furthermore, the connection unit 4 has a connection unit container 60 that forms the outer casing of the connection unit 4. The connection unit container 60 is cylindrical in shape, and its central axis is positioned in the direction in which the first unit 11, the second unit 12, and the transformer 200 are aligned (see Figure 5). One end of the connection unit container 60 is connected to the connecting pipe 50b of the transformer unit container 50. As shown in Figure 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] The first unit container 20, the second unit container 30, the busbar container 40, the transformer unit container 50, and the connecting unit container 60 are filled with insulating gas. Furthermore, the first unit container 20, the second unit container 30, the busbar container 40, the transformer unit container 50, and the connecting unit container 60 are isolated from each other to prevent the insulating gas from flowing between them. The insulating gas used is one that has a low environmental impact and low insulating performance. Specifically, dry air, G-cube, nitrogen gas, etc., are used as insulating gases.

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

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

[0048] Furthermore, in this embodiment, the container forming the outer casing of the power receiving unit 1 is divided into two (or more) first unit containers 20 and second unit containers 30. This allows the equipment constituting the power receiving unit 1 to be individually arranged in the divided first unit containers 20 and second unit containers 30 according to their function, and sufficient insulation distance can be ensured between the equipment. Therefore, in this embodiment, an insulating gas with low insulation performance and environmental impact can be used.

[0049] Specifically, the power receiving unit 1 has numerous components, including a surge arrester LA, a voltage detector VD, a line-side grounding switch ES1, a line-side disconnector DS1, a circuit breaker CB1, and circuit breaker inspection grounding switches ESO1 and ESO2. Therefore, to ensure the insulation of each component, conventional gas-insulated switchgear used insulating gases such as SF6 gas, which have high insulating properties. 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 this disclosure has a low environmental impact and low insulating performance. For this reason, if such an insulating gas is used in a conventional gas-insulated switchgear, it is difficult to arrange the above-mentioned components in close proximity. As a result, in conventional gas-insulated switchgear, unlike the gas-insulated switchgear 101 of this disclosure, it is difficult to increase the size or complexity of the structure of the gas-insulated switchgear when using an insulating gas that has a low environmental impact and low insulating performance.

[0051] Furthermore, in this embodiment, since the service entrance pipes 20c and 20d are arranged on the side surface of the first unit container 20, i.e., on the outer circumferential surface of the main body 20a, the space above the connection unit 4 can be used for bringing in the line L via the service entrance pipes 20c and 20d. As a result, in this embodiment, the limited space in which the gas-insulated switchgear 101 is installed can be effectively utilized. Moreover, in the power receiving and transforming equipment 300 of this embodiment, the transformer 200 can be placed in close proximity to the gas-insulated switchgear 101. Therefore, the installation area of ​​the power receiving and transforming equipment 300 can be reduced.

[0052] Here, using Figures 6 and 7, an example of the internal configuration of the busbar 2 in the gas-insulated switchgear 101 of this disclosure will be specifically described. Figure 6 is a diagram illustrating the example of the internal configuration of the busbar 2 shown in Figure 1. Figure 7 is a diagram illustrating the connection structure C shown in Figure 6. Note that Figure 6 corresponds to a cross-sectional view of the busbar 2 taken perpendicular to the front-rear direction, but hatching has been omitted for the sake of simplifying the drawing (the same applies to Figures 8 to 10 shown later). Note that the position of the cross-section in the front-rear direction is the position where the busbar-side disconnector DS2W, transformer-side disconnector DS3W, etc. of the W phase, which will be described later, are disconnected. Also, in Figure 7, for the sake of simplifying the drawing, the illustration of the first and second movable electrode rods provided in each phase has been omitted, and only the holes through which the first and second movable electrode rods are inserted are shown.

[0053] In the busbar chamber 2 of the gas-insulated switchgear 101 of this embodiment, equipment for three phases, such as U-phase, V-phase, and W-phase, is provided inside the busbar container 40. Specifically, as shown in Figure 6, the busbar-side disconnector (first disconnector) DS2W for the W-phase and the transformer-side disconnector (second disconnector) DS3W for the W-phase are provided so as to face each other in the vertical direction (second direction).

[0054] Furthermore, within the busbar room 2, busbar-side disconnectors for the V-phase and U-phase (not shown) are sequentially installed from the busbar-side disconnector DS2W along the front-to-back direction (first direction), which is perpendicular to the plane of Figure 6. Similarly, within the busbar room 2, transformer-side disconnectors for the V-phase and U-phase (not shown) are sequentially installed from the transformer-side disconnector DS3W along the front-to-back direction, which is perpendicular to the plane of Figure 6. These busbar-side disconnectors for the V-phase and U-phase and transformer-side disconnectors for the V-phase and U-phase are installed facing each other in the vertical direction, similar to the busbar-side disconnector DS2W and the transformer-side disconnector DS3W for the W-phase.

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

[0056] In the busbar-side disconnector DS2W, as shown in Figure 6, the busbar-side disconnector DS2W becomes closed when the right end of the first movable electrode rod 2WMR comes into contact with the first fixed electrode 2WKD. On the other hand, in the busbar-side disconnector DS2W, the right end of the first movable electrode rod 2WMR moves to the left in Figure 6, separating from the first fixed electrode 2WKD, and the busbar-side disconnector DS2W becomes open.

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

[0058] In the transformer-side disconnector DS3W, as shown in Figure 6, the right end of the second movable electrode rod 3WMR comes into contact with the second fixed electrode 3WKD, causing the transformer-side disconnector DS3W to be in a closed state. On the other hand, in the transformer-side disconnector DS3W, the right end of the second movable electrode rod 3WMR moves to the left in Figure 6, separating from the second fixed electrode 3WKD, causing the transformer-side disconnector DS3W to be in an open state.

[0059] Furthermore, in the busbar-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 electrode rods 2WMR and 3WMR, respectively. This operating mechanism is also connected to the left ends of the first and second movable electrode rods of the V-phase and U-phase, respectively (not shown). When the operating mechanism is operated in response to the operation of the above-mentioned operating device, the operating mechanism is activated, allowing the busbar-side disconnectors and transformer-side disconnectors for all three phases to perform a closed or open operation simultaneously.

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

[0061] Furthermore, as shown in Figure 6, the first and second insulating spacers 40d and 40e are positioned away from the center in the left-right direction. In the gas-insulated switchgear 101 of this disclosure, the position where the busbar chamber 2 is drawn out by the first and second insulating spacers 40d and 40e is away from the center which is symmetrical in the left-right direction, thereby making the gas-insulated switchgear 101 more compact (details will be described later).

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

[0063] The first and second support members 40f and 40g are constructed using, for example, insulators and are arranged 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 busbar chamber 2 such that the first movable electrode 2WMD is aligned with the first fixed electrode 2WKD in the left-right direction within the busbar chamber 2. The second support member 40g supports the second movable electrode 3WMD in an electrically insulated state within the busbar chamber 2 such that the second movable electrode 3WMD is aligned with the second fixed electrode 3WKD in the left-right direction within the busbar chamber 2.

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

[0065] As described above, within the busbar chamber 2, the first movable side electrodes and second movable side electrodes of each of the three phases are located in the left half of the busbar chamber 2, while the first fixed side electrodes and first fixed side electrodes of each of the three phases are located within the busbar chamber 2. This makes it easy to reduce the vertical dimensions of the gas-insulated switchgear 101 in this embodiment.

[0066] Furthermore, within the busbar room 2, the three-phase busbar conductors BDU, BDV, and BDW are positioned midway between the busbar-side disconnector DS2W and the transformer-side disconnector DS3W in the vertical direction. Specifically, as shown in Figure 7, the busbar conductors BDU, BDV, and BDW are each constructed using straight metal conductors and are arranged along the vertical centerline C1 so that they are equally spaced from each other in the left-right direction of Figure 6. In addition, the busbar conductors BDU, BDV, and BDW each use metal conductors with the same dimensions in the front-to-back direction, and the busbar conductors BDU, BDV, and BDW are each arranged along the front-to-back direction within the busbar room 2. Furthermore, one end and the other end of each busbar conductor BDU, BDV, and BDW are connected to the receiving-side busbar BUS1 and the transformer-side busbar BUS2, respectively.

[0067] In the above description, we have described the case where one end and the other end of each busbar conductor BDU, BDV, and BDW are connected to the busbar. However, in the gas-insulated switchgear 101 of this disclosure, one of the ends of each busbar conductor BDU, BDV, and BDW may be connected to the busbar, or in some cases, none of the ends may be connected to the busbar.

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

[0069] Specifically, as shown in Figure 7, the connection structure C includes a linear first connecting conductor C2U that connects the busbar conductor BDU and the first movable side electrode 2UMD, a linear first connecting conductor C2V that connects the busbar conductor BDV and the first movable side electrode 2VMD, and a linear first connecting conductor C2W that connects the busbar 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 busbar conductor BDU and the second movable side electrode 3UMD, a linear second connecting conductor C3V that connects the busbar conductor BDV and the second movable side electrode 3VMD, and a linear second connecting conductor C3W that connects the busbar conductor BDW and the second movable side electrode 3WMD.

[0071] Furthermore, in connection structure C, as shown in Figure 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, which is a direction inclined at a predetermined angle range with respect to the vertical direction. Specifically, in order to maintain the insulation distances Z2 to Z5 described later at the required insulation distances and to minimize the dimension of H1 described later, it is desirable that the first connecting conductors C2U, C2V, and C2W and the second connecting conductors C3U, C3V, and C3W each be angled within the predetermined angle range described above with respect to the vertical direction, for example, within the range of 10° to 60°.

[0072] Furthermore, in connection structure C, among the three-phase first connecting conductors C2U, C2V, and C2W, the two-phase first connecting conductors, for example, the V-phase and W-phase first connecting conductors C2V and C2W, use members of the same shape. Also, among the three-phase second connecting conductors C3U, C3V, and C3W, the two-phase second connecting conductors, for example, the V-phase and W-phase second connecting conductors C3V and C3W, use members of the same shape. In this way, among the first and second connecting conductors C2U, C2V, C2W and C3U, C3V, C3W, the two-phase first and second connecting conductors C2V, C2W and C3V, C3W are members of the same shape, so the number of parts in the gas-insulated switchgear 101 can be reduced, and the maintenance and management of the gas-insulated switchgear 101 can be easily performed.

[0073] Furthermore, in connection structure C, as shown in Figures 6 and 7, among the three phases, the first and second connecting conductors C2U, C2V, C2W, and C3U, C3V, C3W, for example, the first and second connecting conductors C2U and C3U of the U phase as the first phase are provided on one side in the front-to-back direction shown in Figure 7. In addition, these first and second connecting conductors C2U and C3U have longer dimensions than the first and second connecting conductors C2V, C2W, C3V, C3W of the other two phases, namely the V phase and the W phase.

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

[0075] Furthermore, in connection structure C, as shown in Figure 6, within the busbar chamber 2, the first connecting conductors C2V and C2W of the V-phase and W-phase adjacent in the front-to-back direction, the second connecting conductors C3V and C3W of the V-phase and W-phase, and the busbar conductors BDV and BDW of the V-phase and W-phase are arranged to be mirror-symmetric with respect to a plane perpendicular to the front-to-back direction (a plane along the center line C2 in Figure 6).

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

[0077] The gas-insulated switchgear 101 of this embodiment, configured as described above, includes a bus chamber 2 and first and second insulating spacers 40d and 40e, which are positioned away from the center of the bus chamber 2 in the left-right direction and support the first and second fixed electrodes 2WKD and 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 and 40g, which support the first and second movable electrodes 2WMD and 3WMD, respectively, so as to be aligned with the first and second fixed electrodes 2WKD and 3WKD in the left-right direction, and linear first and second connecting conductors C2W and C3W, which connect the bus conductor BDW to the first and second movable electrodes 2WMD and 3WMD, respectively.

[0078] With the above configuration, the gas-insulated switchgear 101 of this embodiment can have an asymmetrical structure in the left-right direction without increasing the dimensions in the front-rear and left-right directions regarding the internal structure of the busbar container 40 and the arrangement positions of the first and second insulating spacers 40d and 40e. For this reason, the gas-insulated switchgear 101 of this embodiment can use a connection structure C in which the required insulation distance between two phases within the busbar container 40 is in an oblique direction with respect to the vertical direction.

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

[0080] Furthermore, 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 diagonal direction, which is a direction inclined at a predetermined angle with respect to the vertical direction. As a result, in this embodiment, the vertical dimensions of the gas-insulated switchgear 101 can be reduced, and the compactness of the gas-insulated switchgear 101 can be reliably achieved.

[0081] Furthermore, in the gas-insulated switchgear 101 of this embodiment, the first connecting conductor C2U and the second connecting conductor C3U of the U phase, which are provided on either side in the front-rear direction, are each longer in dimensions than the other two phases, namely the first connecting conductor C2V and the second connecting conductor C3V of the V phase and the first connecting conductor C2W and the 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 the three phases can be compactly arranged within the busbar 2, making it easier to achieve a more compact gas-insulated switchgear 101.

[0082] Furthermore, in the gas-insulated switchgear 101 of this embodiment, for example, the U-phase bus conductor BDU, which is provided on one side in the front-rear direction, is located between the first fixed electrode 2WKD and the second fixed electrode 3WKD in the vertical direction. As a result, in this embodiment, the bus conductors BDU, BDV, and BDW for all three phases can be compactly arranged within the bus chamber 2, making it easier to achieve a more compact gas-insulated switchgear 101.

[0083] Furthermore, in the gas-insulated switchgear 101 of this embodiment, as illustrated in Figure 6, the first connecting conductors C2V and C2W of the V-phase and W-phase adjacent to each other in the front-to-back direction, the second connecting conductors C3V and C3W of the V-phase and W-phase, and the busbar conductors BDV and BDW of the V-phase and W-phase are each arranged to be mirror-symmetric with respect to a plane perpendicular to the front-to-back direction. This makes it possible to more reliably achieve a compact gas-insulated switchgear 101 in this embodiment.

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

[0085] First, using Figure 9, we will describe the busbar chamber 102 of a conventional gas-insulated switchgear as a comparative example. In Figure 9, in the busbar container 140 that constitutes the busbar chamber 102, the busbar-side disconnectors and transformer-side disconnectors for three phases are arranged so as to face each other in the vertical direction along the front-to-back direction (the direction perpendicular to the plane of the paper in Figure 9). In other words, as shown in Figure 9, the busbar-side disconnector D12W and transformer-side disconnector D13W for the W phase are located on one side in the front-to-back direction within the busbar container 140, and the busbar-side disconnectors and transformer-side disconnectors for the V and U phases are installed sequentially along the front-to-back direction.

[0086] Furthermore, as shown in Figure 9, in the busbar container 140, insulating spacers 140d and 140e are provided so as to face each other in the vertical direction, for leading out the busbar-side disconnector D12W and the transformer-side disconnector D13W of the W phase to the outside, respectively. The movable side electrode 12WMD of the busbar-side disconnector D12W and the movable side electrode 13WMD of the transformer-side disconnector D13W are fixed to the insulating spacers 140d and 140e.

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

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

[0089] Furthermore, similar to this embodiment, the busbar-side disconnectors D12W and transformer-side disconnectors D13W are configured such that, through the operation of an operating mechanism (not shown), the busbar-side disconnectors and transformer-side disconnectors for all three phases can simultaneously perform either a closing or opening operation.

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

[0091] Furthermore, within the busbar chamber 102, the insulating spacers 140d and 140e are positioned to coincide with the left-right center of the busbar container 140. Unlike in this embodiment, these insulating spacers 140d and 140e are arranged symmetrically around the dashed line C3 in Figure 9. In other words, in the comparative example busbar chamber 102, its internal structure and insulating spacers 140d and 140e are configured to be symmetrical in the left-right, front-back, and up-down directions. On the other hand, in the busbar chamber 2 of this embodiment, its internal structure and the first and second insulating spacers 40d and 40e are configured to be symmetrical in the front-back and up-down directions, and asymmetrical in the left-right direction.

[0092] Furthermore, within the busbar chamber 102, the 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 comprises the first and second connecting conductors C12U and C13U of the U phase, the first and second connecting conductors C12V and C13V of the V phase, and the first and second connecting conductors C12W and C13W of the W phase.

[0093] As shown in Figure 9, the first and second connecting conductors C12W and C13W 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, which are continuously provided at one end and the other end of the longitudinal portion, respectively. In the first connecting conductor C12W, one short portion is connected to the busbar conductor BDW and the other short portion is connected to the fixed electrode 12WKD of the busbar-side disconnector D12W. In the second connecting conductor C13W, one short portion is connected to the busbar conductor BDW and the other short portion is connected to the fixed electrode 13WKD of the transformer-side disconnector D13W.

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

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

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

[0097] In the comparative example, as shown in Figure 9, it was necessary to arrange the three-phase busbar-side disconnectors, the three-phase busbar conductors BDU, BDV, and BDW, and the three-phase transformer-side disconnectors within the busbar container 140 while ensuring insulation distances Z11 to Z18. Specifically, within the busbar container 140, it was necessary to arrange the fixed electrodes of the busbar-side disconnectors and the transformer-side disconnectors relative to the inner wall surface of the busbar container 140, while ensuring insulation distances Z11 and Z18 as insulation distances to ground.

[0098] Furthermore, in the comparative example, it was necessary to ensure an insulation distance Z12 as the inter-electrode insulation distance, for example, by arranging the first connecting conductor C12W of the W phase and the movable electrode of the busbar-side disconnector of the V phase. Also, it was necessary to ensure an insulation distance Z17 as the inter-electrode insulation distance, for example, by arranging the second connecting conductor C13W of the W phase and the movable electrode of the transformer-side disconnector of the V phase.

[0099] Furthermore, in the comparative example, it was necessary to ensure an insulation distance Z13 as a correlation insulation distance and to arrange, for example, the first connecting conductor C12W of the W phase and the bus conductor BDV of the V phase. Also, it was necessary to ensure an insulation distance Z14 as an interphase insulation distance and to arrange, for example, the first connecting conductor C12W of the W phase and the bus conductor BDU of the U phase.

[0100] Furthermore, in the comparative example, it was necessary to ensure an insulation distance Z15 as a correlation insulation distance, for example, by arranging the second connecting conductor C13W of the W phase and the bus conductor BDV of the V phase. Also, it was necessary to ensure an insulation distance Z16 as an interphase insulation distance, for example, by arranging the second connecting conductor C13W of the W phase and the bus conductor BDU of the U phase.

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

[0102] In contrast, the busbar container 40 of this embodiment uses a connection structure C, as shown in Figure 8, in which the required insulation distance between the two phases is in an oblique direction with respect to the vertical direction. Specifically, within the busbar container 40, insulation distances Z1 and Z6 as insulation distances to ground must be secured, and the fixed electrode of the busbar-side disconnector and the fixed electrode of the transformer-side disconnector must be positioned relative to the inner wall surface of the busbar container 40. Note that these insulation distances Z1 and Z6 are the same values ​​as insulation distances Z11 and Z18 if the rated voltage of the gas-insulated switchgear 101 is the same as that of the comparative example.

[0103] Furthermore, in this embodiment, it is necessary to ensure an insulation distance Z2 as the inter-pole insulation distance, for example, by arranging the first connecting conductor C2U of the U phase and the first fixed electrode 2WKD of the busbar-side disconnector DS2W of the W phase. Also, it is necessary to ensure an insulation distance Z5 as the inter-pole insulation distance, for example, by arranging the second connecting conductor C3U of the U phase and the second fixed electrode 3WKD of the transformer-side disconnector DS3W of the W phase.

[0104] Furthermore, in this embodiment, it is necessary to ensure an insulation distance Z3 as a correlation insulation distance and to arrange, for example, the first connecting conductor C2U of the U phase and the bus conductor BDV of the V phase. Also, it is necessary to ensure an insulation distance Z4 as an interphase insulation distance and to arrange, for example, the second connecting conductor C3U of the U phase and the bus conductor BDV of the V phase.

[0105] As described above, in this embodiment, in the vertical direction within the busbar container 40, the three-phase busbar-side disconnectors, three-phase busbar conductors BDU, BDV, BDW, and three-phase transformer-side disconnectors can be arranged considering the insulation distances Z2 to Z5 for four layers, in addition to the insulation distances Z1 and Z6 (insulation distance to ground) determined by the rated voltage, as the necessary insulation distances between the two phases. As a result, in this embodiment, the vertical (height) dimensions can be reduced compared to the comparative example.

[0106] Specifically, in this embodiment, the height dimension of the busbar 2 shown as H1 in Figure 8 can be reduced by approximately 7 / 11 compared to the height dimension of the busbar 102 of the comparative example shown as H2 in Figure 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 using a normal truck. For example, this may require the use of special vehicles such as low-floor trailers or the disassembled transport of the gas-insulated switchgear.

[0107] In contrast, in this embodiment, by keeping the height dimension of the busbar 2 low, the overall height dimension of the gas-insulated switchgear 101 can be kept low, and as a result the overall height dimension of the gas-insulated switchgear 101 can be kept below the above height limit, and the gas-insulated switchgear 101 incorporating the busbar 2 can be transported without using the above-mentioned special vehicles or disassembly transport. As a result, in this embodiment, effects such as simplifying the transport of the gas-insulated switchgear 101 including the busbar 2 can be achieved. Specifically, in this embodiment, since the gas-insulated switchgear 101 can be transported in an assembled state, on-site installation is possible after the completion of the shipping inspection process, and the implementation of disassembly, on-site assembly, on-site gas treatment, and on-site inspection can be omitted, resulting in significant advantages in terms of transport, construction period, and quality.

[0108] [Variation] Modifications of the present disclosure will be specifically described with reference to Figure 10. Figure 10 is a diagram illustrating an example of the internal configuration of the busbar chamber 2 of a gas-insulated switchgear 101 according to a modification. For the sake of explanation, components having the same function as those described in the above embodiments will be denoted by the same reference numerals, and their descriptions will not be repeated.

[0109] The main difference between the modified example and Embodiment 1 is that, within the busbar chamber 2, in the left-right direction, U The difference lies in the reversal of the phase sequence of the phase and the W phase.

[0110] As shown in Figure 10, in the busbar room 2 of this modified example, the U-phase busbar-side disconnector DS2U and the U-phase transformer-side disconnector DS3U are installed on the front side in the front-to-back direction, facing each other in the vertical direction. In this modified example, busbar-side disconnectors for the V-phase and W-phase (not shown) are installed sequentially from the busbar-side disconnector DS2U along the front-to-back direction. Similarly, in this modified example, transformer-side disconnectors for the V-phase and W-phase (not shown) are installed sequentially from the transformer-side disconnector DS3U along the front-to-back direction. These V-phase and W-phase busbar-side disconnectors and transformer-side disconnectors for the V-phase and W-phase are installed facing each other in the vertical direction, similar to the U-phase busbar-side disconnector DS2U and the U-phase transformer-side disconnector DS3U.

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

[0112] In the busbar-side disconnector DS2U, as shown in Figure 10, the busbar-side disconnector DS2U becomes closed (closed) when the right end of the first movable electrode rod 2UMR comes into contact with the first fixed electrode 2UKD. On the other hand, in the busbar-side disconnector DS2U, the right end of the first movable electrode rod 2UMR moves to the left in Figure 10, separating from the first fixed electrode 2UKD, and the busbar-side disconnector DS2U becomes open (open).

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

[0114] In the transformer-side disconnector DS3U, as shown in Figure 10, the right end of the second movable electrode rod 3UMR comes into contact with the second fixed electrode 3UKD, causing the transformer-side disconnector DS3U to be in a closed state. On the other hand, in the transformer-side disconnector DS3U, the right end of the second movable electrode rod 3UMR moves to the left in Figure 10, separating from the second fixed electrode 3UKD, causing the transformer-side disconnector DS3U to be in an open state.

[0115] Furthermore, in the busbar-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 electrode rods 2UMR and 3UMR, respectively. This operating mechanism is also connected to the left ends of the first and second movable electrode rods of the V-phase and W-phase, respectively (not shown). When the operating mechanism is operated in response to the operation of the above-mentioned operating device, the operating mechanism is activated, allowing the busbar-side disconnectors and transformer-side disconnectors for all three phases to perform a closed or open operation simultaneously.

[0116] In another modified configuration, the three-phase busbar conductors BDU, BDV, and BDW are positioned in the vertical direction between the busbar-side disconnector DS2U and the transformer-side disconnector DS3U.

[0117] Furthermore, in the modified connection structure C, the same first connecting conductors are used for two phases of the three-phase first connecting conductors C2U, C2V, and C2W, for example, the first connecting conductors C2U and C2V for the U-phase and V-phase. Also, the same second connecting conductors are used for two phases of the three-phase second connecting conductors C3U, C3V, and C3W, for example, the second connecting conductors C3U and C3V for the U-phase and V-phase. In this way, the first and second connecting conductors C2U, C2V, C2W and C3U, C3V, C3W for two phases are the same, so the number of parts in the gas-insulated switchgear 101 can be reduced, and maintenance and management of the gas-insulated switchgear 101 can be easily performed.

[0118] Furthermore, in the modified connection structure C, as shown in Figure 10, among the three phases, the first and second connecting conductors C2U, C2V, C2W and C3U, C3V, C3W, for example, the first and second connecting conductors C2W and C3W of the W phase as the first phase are provided on either one side in the front-to-back direction. In addition, these first and second connecting conductors C2W and C3W are formed to be larger in dimension than the first and second connecting conductors C2U, C2V and C3U, C3V of the other two phases, namely the U phase and the V phase.

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

[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-phase and V-phase adjacent in the front-to-back direction, the second connecting conductors C3U and C3V of the U-phase and V-phase, and the busbar conductors BDU and BDV of the U-phase and V-phase 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 center positions of the first and second support members 40f and 40g, similar to those shown in Figure 6. Similarly, the second connecting conductors C3U and C3V are arranged symmetrically with respect to the aforementioned center line. Similarly, the busbar conductors BDU and BDV are arranged symmetrically with respect to the aforementioned center line.

[0122] With the above configuration, this modified version achieves the same effects as that of the above embodiment.

[0123] In the above explanation, the case in which the cable head CHD is connected to the service entrance pipes 20c and 20d was described, but this disclosure is not limited to this, and for example, a configuration in which a power receiving bushing is connected to the service entrance pipes 20c and 20d instead of the cable head CHD is also possible.

[0124] 〔summary〕 To solve the above problems, a gas-insulated switchgear according to a first aspect of the present disclosure comprises: a busbar chamber; first disconnectors for each phase provided in the busbar chamber along a first direction; second disconnectors for each phase provided in the busbar chamber along a first direction, wherein the second disconnectors are provided in the busbar chamber so as to face each of the first disconnectors for each phase in a second direction perpendicular to the first direction; and busbar conductors for each phase provided at an intermediate position between the first disconnectors and the second disconnectors for each phase in the second direction. , a three-phase integrated gas-insulated switchgear, wherein each of the first disconnectors has a first fixed electrode, a first movable electrode, and a first movable electrode rod that is movably supported by the first movable electrode and can move toward and toward the first fixed electrode from a third direction perpendicular to the first and second directions, and each of the second disconnectors has a second fixed electrode, a second movable electrode, and a second movable electrode rod that is movably supported by the second movable electrode and can move toward and toward the second fixed electrode from a third direction, In the third direction, each phase has a first insulating spacer positioned away from the center of the bus chamber and supporting the first fixed electrode and drawing the first fixed electrode outside the bus chamber; in the second direction, each phase has a second insulating spacer positioned opposite to the first insulating spacer and supporting the second fixed electrode and drawing the second fixed electrode outside the bus chamber; each phase has a first support member that supports the first movable electrode so that the first movable electrode of each phase is aligned with the first fixed electrode of each phase in the third direction; each phase has a second support member positioned opposite to the first support member in the second direction and supporting the second movable electrode so that the second movable electrode of each phase is aligned with the second fixed electrode of each phase in the third direction; each phase has a linear first connecting conductor that connects the bus conductor and the first movable electrode; and each phase has a linear second connecting conductor that connects the bus conductor and the second movable electrode.

[0125] According to the above configuration, a gas-insulated switchgear that can be made more compact can be constructed.

[0126] In the gas-insulated switchgear of the second embodiment, the first connecting conductor and the second connecting conductor may each be provided along an oblique direction, which is inclined at a predetermined angle with respect to the second direction.

[0127] According to the above configuration, the dimensions in the second direction of the gas-insulated switchgear can be reduced, and the compactness of the gas-insulated switchgear can be reliably achieved.

[0128] The third embodiment of the gas-insulated switchgear is a gas-insulated switchgear of the first or second embodiment in which, of the three phases, the two phases of the first connecting conductors are members of the same shape, and of the three phases, the two phases of the second connecting conductors are members of the same shape.

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

[0130] The fourth gas-insulated switchgear is a gas-insulated switchgear of the third embodiment in which 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.

[0131] According to the above configuration, the first and second connecting conductors for the three phases can be compactly arranged within the busbar chamber, making it easier to miniaturize the gas-insulated switchgear.

[0132] In the gas-insulated switchgear of the fourth embodiment, the busbar conductor of a phase different from the two phases may be located between the first fixed electrode and the second fixed electrode in the second direction.

[0133] According to the above configuration, the busbar conductors for the three phases can be arranged compactly, making it easier to miniaturize the gas-insulated switchgear.

[0134] The fifth gas-insulated switchgear is a gas-insulated switchgear of any of the third to fifth embodiments, in which the two-phase first connecting conductor, the two-phase second connecting conductor, and the two-phase busbar conductor may be arranged so as to be mirror-symmetric with respect to a plane perpendicular to the first direction.

[0135] According to the above configuration, within the busbar chamber, 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-symmetric with respect to a plane perpendicular to the first direction, thus making the gas-insulated switchgear more compact.

[0136] A substation according to the sixth aspect of this disclosure comprises a gas-insulated switchgear according to any of the first to sixth aspects, a transformer connected to the gas-insulated switchgear, and a power supply metering transformer connected to the bus conductor.

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

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

[0139] 101 Gas-insulated switchgear 2 Busbar room DS2W, DS2U Busbar side disconnector (1st disconnector) 2WKD, 2UKD 1st fixed side electrode 2WMD, 2UMD 1st movable electrode 2WMR, 2UMR 1st movable electrode rod DS3W, DS3U Transformer side disconnector (second disconnector) 3WKD, 3UKD 2nd fixed side electrode 3WMD, 3UMD 2nd movable electrode 3WMR, 3UMR 2nd movable 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 Transformers for power supply and demand metering

Claims

1. A three-phase integrated gas-insulated switchgear comprising: a busbar chamber; first disconnectors for each phase provided within the busbar chamber along a first direction; second disconnectors for each phase provided within the busbar chamber along a first direction, wherein the second disconnectors for each phase are provided within the busbar chamber so as to face each other in a second direction perpendicular to the first direction; and busbar conductors for each phase provided at an intermediate position between the first disconnectors and the second disconnectors for each phase in the second direction; Each of the first disconnectors includes a first fixed electrode, a first movable electrode, and a first movable electrode rod that is movably supported by the first movable electrode and can move toward and away from the first fixed electrode from a third direction perpendicular to the first and second directions. Each of the second disconnectors comprises a second fixed electrode, a second movable electrode, and a second movable electrode rod that is movably supported by the second movable electrode and can move toward and away from the second fixed electrode from the third direction. In the third direction, a first insulating spacer for each phase is provided, which is positioned away from the center of the busbar chamber and supports the first fixed electrode, and which leads the first fixed electrode to the outside of the busbar chamber. The second insulating spacers for each phase are provided so as to face each other in the second direction, and support the second fixed electrode and bring the second fixed electrode out of the busbar chamber, A first support member for each phase supports the first movable electrode of each phase such that the first movable electrode of each phase is aligned with the first fixed electrode of each phase in the third direction, A second support member for each phase is provided so as to face each other in the second direction, and the second movable side electrode of each phase is supported such that it 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, A gas-insulated switchgear characterized by comprising linear second connecting conductors for each phase that connect the busbar conductor and the second movable electrode.

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

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

4. 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. The gas-insulated switchgear according to claim 3, characterized in that 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. The gas-insulated switchgear according to claim 4, wherein the busbar conductor of a phase different from the two phases is located between the first fixed electrode and the second fixed electrode in the second direction.

6. The gas-insulated switchgear according to any one of claims 3 to 5, wherein the two-phase first connecting conductor, the two-phase second connecting conductor, and the two-phase busbar conductor are arranged so as to be mirror-symmetric with respect to a plane perpendicular to the first direction.

7. A gas-insulated switchgear according to claim 1, A transformer connected to the aforementioned gas-insulated switchgear, A power receiving and transforming equipment characterized by comprising a power supply and demand metering transformer connected to the busbar conductor.

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