WO2025017790A1 - ガス絶縁開閉装置及び受変電設備 - Google Patents

ガス絶縁開閉装置及び受変電設備 Download PDF

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Publication number
WO2025017790A1
WO2025017790A1 PCT/JP2023/026098 JP2023026098W WO2025017790A1 WO 2025017790 A1 WO2025017790 A1 WO 2025017790A1 JP 2023026098 W JP2023026098 W JP 2023026098W WO 2025017790 A1 WO2025017790 A1 WO 2025017790A1
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WO
WIPO (PCT)
Prior art keywords
phase
busbar
side electrode
gas
insulated switchgear
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2023/026098
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English (en)
French (fr)
Japanese (ja)
Inventor
安宣 劉
和彦 堀越
弘明 佐藤
俊哉 横井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissin Electric Co Ltd
Original Assignee
Nissin Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nissin Electric Co Ltd filed Critical Nissin Electric Co Ltd
Priority to PCT/JP2023/026098 priority Critical patent/WO2025017790A1/ja
Priority to CN202380098753.8A priority patent/CN121511535A/zh
Priority to JP2025533732A priority patent/JPWO2025017790A1/ja
Publication of WO2025017790A1 publication Critical patent/WO2025017790A1/ja
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear

Definitions

  • This disclosure relates to gas-insulated switchgear, in particular a three-phase integrated gas-insulated switchgear and substation equipment using the same.
  • This disclosure was made in consideration of the above problems, and aims to provide a gas-insulated switchgear and substation equipment that can be made compact.
  • a gas-insulated switchgear includes a busbar room, a first disconnector for each phase provided in the busbar room along a first direction, a second disconnector for each phase provided in the busbar room along the first direction, the second disconnector for each phase provided in the busbar room so as to face the first disconnector for each phase in a second direction perpendicular to the first direction, and a busbar conductor for each phase provided at an intermediate position between the first disconnector and the second disconnector for each phase in the second direction.
  • each of the first disconnectors having a first fixed-side electrode, a first movable-side electrode, and a first movable-side electrode bar that is movably supported by the first movable-side electrode and can be moved toward and away from the first fixed-side electrode in a third direction perpendicular to the first direction and the second direction; and each of the second disconnectors having a second fixed-side electrode, a second movable-side electrode, and a second movable-side electrode bar that is movably supported by the second movable-side electrode and can be moved toward and away from the second fixed-side electrode in the third direction,
  • the first insulating spacer of each phase 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 draw the first fixed side electrode outside the busbar chamber; the second insulating spacer of each phase is arranged to face the first insulating spacer in the second direction and supports the second fixed side electrode to draw the
  • a substation facility includes the gas-insulated switchgear, a transformer connected to the gas-insulated switchgear, and an instrument transformer for power supply and demand connected to the bus conductor.
  • FIG. 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 the external configuration of the gas-insulated switchgear.
  • FIG. 2 is a single-line diagram showing a circuit configuration of the gas-insulated switchgear.
  • FIG. 2 is a side view showing an external configuration of a power receiving and transforming facility including the gas-insulated switchgear.
  • FIG. 2 is a plan view showing an external configuration of the above-mentioned power receiving and transforming equipment.
  • FIG. 2 is a diagram illustrating an example of the internal configuration of the busbar room shown in FIG. 1 .
  • FIG. 7 is a diagram for explaining the connection structure shown in FIG. 6 .
  • FIG. 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 the external configuration of the gas-insulated switchgear.
  • FIG. 2 is a single
  • FIG. 4 is a diagram illustrating the height dimension of the busbar chamber and the insulation distance inside the busbar chamber.
  • 10 is a diagram illustrating the height dimension of a busbar chamber of a gas-insulated switchgear according to a comparative example and an insulation distance inside the busbar chamber.
  • FIG. 10 is a diagram illustrating an example of an internal configuration of a busbar chamber of a gas-insulated switchgear according to a modified example.
  • FIG. 1 is a perspective view showing the external configuration of a gas-insulated switchgear 101 according to one 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 substation equipment 300 including the gas-insulated switchgear 101.
  • FIG. 5 is a plan view showing the external configuration of the substation equipment 300.
  • the up-down direction, front-back direction, and left-right direction of the gas-insulated switchgear 101 are defined as shown by the double-headed arrows in Figure 1.
  • the first direction, second direction, and third direction are the front-back direction, up-down direction, and 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.
  • the 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 in the line L. The end of the cable of the line L is connected to the cable head CHD.
  • 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.
  • the gas-insulated switchgear 101 of this embodiment includes an operation box 70, a cover 80, a support frame 90, and a base 100.
  • the control box 70 houses controls for operating the circuit breakers (described below) (see FIG. 3) arranged in the second unit 12, busbar room 2, and 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 controls, and has an openable door on the front side.
  • the cover 80 is an openable cover structure that covers the current transformer CT and cable head CHD as well as the line L.
  • 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 stand for adjusting the height of the gas-insulated switchgear 101 that is connected to the transformer 200.
  • the substation equipment 300 includes a pair of gas-insulated switchgears 101, a pair of transformers 200, and a power supply and demand voltage transformer (hereinafter referred to as "VCT") 400.
  • VCT power supply and demand voltage transformer
  • 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 regular device, and the other set of gas-insulated switchgears 101 and transformers 200 is provided as a standby device.
  • the first unit 11 and second unit 12 of the power receiving unit 1 and the transformer 200 are arranged in a straight line as shown by the dashed line in FIG. 5.
  • the transformer 200 is also connected to the gas-insulated switchgear 101 via the connection unit 4.
  • the VCT 400 is disposed between the second units 12 of a pair of gas-insulated switchgears 101.
  • the VCT 400 is also connected to the pair of second units 12.
  • connection unit 4 we will provide a detailed explanation of the power receiving unit 1, busbar room 2, transformer unit 3, and connection unit 4.
  • the power receiving unit 1 is a unit that opens and closes 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.
  • the first unit 11 has a lightning arrester LA, a voltage detection device VD, a line-side earthing switch ES1, and a line-side disconnect switch DS1.
  • the voltage detection device VD detects the voltage of the conductor connected to the cable head CHD.
  • the lightning arrester LA is provided between the conductor and ground.
  • the line-side earthing switch ES1 grounds the conductor.
  • the line-side disconnector DS1 has one end connected to the line L via the cable head CHD.
  • the circuit breaker CB1 has one end connected to the other end of the line-side disconnector DS1.
  • 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 connection pipe 20b, and intake pipes 20c and 20d.
  • the main body 20a is cylindrical and is arranged so that its central axis faces the vertical direction.
  • the lightning arrester LA, the voltage detection device VD, the line side earthing switch ES1, and the line side disconnect switch DS1 are housed inside the main body 20a.
  • connection pipe 20b is provided for connection to the second unit container 30, which will be described later.
  • the connection 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.
  • 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.
  • the cable head CHD may also be attached to the lead-in pipe 20d.
  • the inlet 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, in positions that do not face the transformer 200.
  • the inlet pipes 20c and 20d are arranged, for example, so as to face directions A and B, respectively, perpendicular to the direction in which the transformer 200 is arranged relative to the first unit 11 (the direction in which the dashed line in Figure 5 extends).
  • the inlet pipes 20c and 20d are arranged in positions that are opposite each other on the outer peripheral surface of the main body 20a.
  • the second unit 12 has a circuit breaker CB1 and circuit breaker inspection earth switches ESO1 and ESO2.
  • the circuit breaker inspection earth switches ESO2 and ESO3 close when inspecting the circuit breaker CB1 to earth both ends of the circuit breaker CB1.
  • Each of the circuit breaker CB1 and the circuit breaker inspection earth switches ESO1 and ESO2 is operated by the above-mentioned operating device housed in the operating box 70.
  • 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 connecting pipe 30c.
  • the main body 30a is cylindrical in shape, with its central axis facing up and down, and is arranged adjacent to the main body 20a of the first unit container 20 so as to be aligned horizontally.
  • the inside of the main body 30a houses the circuit breaker CB1 and the circuit breaker inspection earthing switches ESO1 and ESO2.
  • connection pipe 30b is provided for connection to the first unit container 20 described above.
  • the connection 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 connection pipes 20b, 30b are connected to each other to communicate the insides of the main body 20a, 30a.
  • the communication pipe 30c is a conduit for communicating the main body 30a with the operation box 70.
  • the busbar room 2 has a receiving side busbar BUS1, a transformer side busbar BUS2, a busbar side disconnector DS2, and a transformer side disconnector DS3.
  • the busbar side disconnector DS2 is provided between the receiving side busbar BUS1 and a circuit breaker CB1 in the second unit 12.
  • the transformer side disconnector DS3 is provided between the transformer side busbar BUS2 and a circuit breaker CB2 in the transformer unit 3, which will be described later.
  • the receiving side busbar BUS1 is a busbar that connects one end of the busbar side disconnector DS2 to the input end of the VCT400.
  • the transformer side busbar BUS2 is a busbar that connects one end of the transformer side disconnector DS3 to the output end of the VCT400.
  • Each of these busbar side disconnectors DS2 and transformer side disconnectors DS3 is operated by the above-mentioned operating device housed in the operating box 70.
  • the busbar room 2 also has a busbar container 40 that forms the outer shell of the busbar room 2.
  • the busbar container 40 has a main body 40a, a connection pipe 40b, and a connecting pipe 40c.
  • the main body 40a has a cylindrical shape, its central axis faces the up-down direction, and is arranged 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 inside of the main body 40a contains 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. The 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.
  • connection pipe 40b is a pipe provided for connection to the VCT 400.
  • the communication pipe 40c is a pipe for communicating between the main body 40a and the operation box 70.
  • Transformer unit 3 switches between the transformer side bus BUS2 and the primary side of transformer 200.
  • Transformer unit 3 has a circuit breaker CB2 and circuit breaker inspection earth switches ESO3 and ESO4.
  • circuit breaker inspection earthing switches ESO3 and ESO4 are closed when inspecting the circuit breaker CB2 to earth both ends of the circuit breaker CB2.
  • 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.
  • 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.
  • the connection unit 4 has a bushing BS to connect 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.
  • 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 and 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.
  • the other end of the connection unit container 60 is connected to the connection part 201 of the transformer 200.
  • a bushing BS is housed inside the connection unit container 60.
  • Insulating gas is sealed inside the first unit container 20, the second unit container 30, the busbar container 40, the transformer unit container 50, and the connection unit container 60.
  • the first unit container 20, the second unit container 30, the busbar container 40, the transformer unit container 50, and the connection unit container 60 are isolated from each other so that the insulating gas does not flow between them.
  • An insulating gas with 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.
  • the inlet pipes 20c, 20d are arranged in a position on the side surface of the first unit 11 that does not face the transformer 200.
  • the inlet pipes 20c, 20d do not interfere with the 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 substation equipment 300 can be reduced.
  • the container forming the outer shell of the power receiving unit 1 is divided into two (multiple) first unit container 20 and second unit container 30.
  • 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 sufficient insulation distance between the devices can be ensured. Therefore, in this embodiment, an insulating gas with both low insulation performance and environmental load can be used.
  • the power receiving unit 1 has many 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.
  • insulating gases such as SF6 gas, which has high insulating performance.
  • insulating gases are generally greenhouse gases and have a high environmental load.
  • the insulating gas used in the gas-insulated switchgear 101 of the present disclosure has a low environmental load and low insulating performance. For this reason, 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, in the conventional gas-insulated switchgear, when an insulating gas with a low environmental load and low insulating performance is used, unlike the gas-insulated switchgear 101 of the present disclosure, it is difficult to increase the size and complexity of the structure of the gas-insulated switchgear.
  • the inlet pipes 20c, 20d are arranged on the side of the first unit container 20, i.e., on the outer peripheral surface of the main body 20a, so the space above the connection unit 4 can be used for drawing in the line L through the inlet pipes 20c, 20d.
  • the transformer 200 can be arranged in close proximity to the gas-insulated switchgear 101. Therefore, the installation area of the substation equipment 300 can be reduced.
  • Fig. 6 is a diagram for explaining an example of the internal configuration of the busbar chamber 2 shown in Fig. 1.
  • Fig. 7 is a diagram for explaining 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 is omitted in order to simplify the drawing (the same applies to Figs. 8 to 10 shown later).
  • the position of the cross section in the front-rear direction is the position at which the W-phase busbar side disconnector DS2W, transformer side disconnector DS3W, etc., described later, are disconnected.
  • the first and second movable side electrode rods provided in each phase are omitted from illustration, and only the holes through which the first and second movable side electrode rods are inserted are illustrated.
  • the W-phase bus-side disconnector (first disconnector) DS2W and the W-phase transformer-side disconnector (second disconnector) DS3W are provided to face each other in the vertical direction (second direction).
  • V-phase and U-phase busbar side disconnectors are provided in sequence from the busbar side disconnector DS2W along the front-to-back direction (first direction) that is perpendicular to the paper surface of FIG. 6.
  • V-phase and U-phase transformer side disconnectors are provided in sequence from the transformer side disconnector DS3W along the front-to-back direction that is perpendicular to the paper surface of FIG. 6.
  • V-phase and U-phase busbar side disconnectors and V-phase and U-phase transformer side disconnectors are provided to face each other in the up-down direction, similar to the W-phase busbar side disconnector DS2W and W-phase transformer side disconnector DS3W.
  • the bus-side disconnector DS2W includes a first fixed-side electrode 2WKD, a first movable-side electrode 2WMD, and a first movable-side electrode bar 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 bar 2WMR is supported by the first movable-side electrode 2WMD so as to be movable in the left-right direction (third direction).
  • the transformer side disconnect switch DS3W has a second fixed side electrode 3WKD, a second movable side electrode 3WMD, and a second movable side electrode bar 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 bar 3WMR is supported by the second movable side electrode 3WMD so that it can move left and right.
  • an operating mechanism (not shown) is connected to the left ends of the first and second movable side electrodes 2WMR and 3WMR.
  • This operating mechanism is also connected to the left ends of the first and second movable side electrodes of the V phase and U phase (not shown), and the operating mechanism operates in response to the operation of the operating device, allowing the busbar side disconnector and the transformer side disconnector for three phases to perform a closing or opening operation collectively.
  • the first and second insulating spacers 40d, 40e are insulating members for drawing the corresponding busbar side disconnector DS2W and transformer side disconnector DS3W to the outside of the busbar room 2, and are arranged to face each other in the second direction.
  • the first insulating spacer 40d has a line connected to the first fixed side electrode 2WKD of the busbar side disconnector DS2W at one end, and the other end of the line is connected to the circuit breaker CB1.
  • the second insulating spacer 40e has a line connected to the second fixed side electrode 3WKD of the transformer side disconnector DS3W at one end, and the other end of the line is connected to the circuit breaker CB2.
  • 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 busbar chamber 2 are positioned away from the center, which 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).
  • first and second insulating spacers 40d, 40e are provided for each of the three phases, but the first and second insulating spacers for each of the three phases may be provided integrally and attached to the busbar container 40.
  • the first and second support members 40f, 40g are constructed using, for example, insulating ceramics, and are arranged to face each other in the second direction.
  • the first support member 40f supports the first movable side electrode 2WMD in an electrically insulated state within the busbar chamber 2 so that the first movable side electrode 2WMD is aligned with the first fixed side electrode 2WKD in the left-right direction within the busbar chamber 2.
  • the second support member 40g supports the second movable side electrode 3WMD in an electrically insulated state within the busbar chamber 2 so that the second movable side electrode 3WMD is aligned with the second fixed side electrode 3WKD in the left-right direction within the busbar chamber 2.
  • first and second support members 40f, 40g are provided for each of the three phases, but the first and second support members for each of the three phases may be provided integrally and installed within the busbar 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 busbar chamber 2, and the three-phase first fixed side electrodes and the three-phase first fixed side electrodes are located within the busbar chamber 2.
  • the three-phase busbar conductors BDU, BDV, and BDW are provided at the midpoint between the busbar side disconnector DS2W and the transformer side disconnector DS3W in the vertical direction.
  • the busbar conductors BDU, BDV, and BDW are each made of a straight metal conductor and are arranged along the vertical center line C1 so as to be equidistant from each other in the left-right direction of FIG. 6.
  • busbar conductors BDU, BDV, and BDW each use a metal conductor having the same dimensions in the front-to-rear direction, and the busbar conductors BDU, BDV, and BDW are each arranged along the front-to-rear direction in the busbar room 2.
  • one end and the other end of each of the busbar conductors BDU, BDV, and BDW are connected to the power receiving side busbar BUS1 and the transformer side busbar BUS2, respectively.
  • each of the bus conductors BDU, BDV, and BDW are connected to a busbar.
  • one end of each of the bus conductors BDU, BDV, and BDW may be connected to a busbar, or in some cases, none of the ends may be connected to a busbar.
  • 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.
  • 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.
  • connection structure C also includes a linear second connection conductor C3U that connects the bus conductor BDU and the second movable side electrode 3UMD, a linear second connection conductor C3V that connects the bus conductor BDV and the second movable side electrode 3VMD, and a linear second connection conductor C3W that connects the bus conductor BDW and the second movable side electrode 3WMD.
  • connection structure C as shown in Fig. 6, the first connecting conductors C2U, C2V, C2W and the second connecting conductors C3U, C3V, 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.
  • the first connecting conductors C2U, C2V, C2W and the second connecting conductors C3U, C3V, C3W to be each at an angle within the above-mentioned predetermined angle range with respect to the vertical direction, for example, within the range of 10° to 60°.
  • connection structure C among the three-phase first connecting conductors C2U, C2V, C2W, the first connecting conductors for two phases, for example, the first connecting conductors C2V and C2W for the V phase and the W phase, are made of materials having the same shape. Furthermore, among the three-phase second connecting conductors C3U, C3V, C3W, the second connecting conductors for two phases, for example, the second connecting conductors C3V and C3W for the V phase and the W phase, are made of materials having the same shape.
  • the first and second connecting conductors C2U, C2V, C2W and C3U, C3V, C3W are made of materials having the same shape, so that the number of parts of the gas-insulated switchgear 101 can be reduced, and the maintenance and management of the gas-insulated switchgear 101 can be easily performed.
  • connection structure C as shown in Figures 6 and 7, among the three-phase 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 either side in the front-to-rear direction shown in Figure 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 W phase.
  • connection structure C as shown in FIG. 6, the bus conductor BDU of the U phase, which is the first phase, is located between the first fixed side electrode 2WKD and the second fixed side electrode 3WKD in the vertical direction.
  • connection structure C in the busbar chamber 2, the first connecting conductors C2V, C2W of the V and W phases, which are adjacent in the fore-and-aft direction, the second connecting conductors C3V, C3W of the V and W phases, and the busbar conductors BDV, BDW of the V and W phases 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).
  • first connecting conductors C2V, C2W are arranged symmetrically with respect to each other with respect to a center line C2 that connects the left-right center positions of the first and second support members 40f, 40g, 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.
  • the gas-insulated switchgear 101 of this embodiment configured as described above includes the busbar chamber 2, and first and second insulating spacers 40d, 40e that are arranged at a position away from the center of the busbar chamber 2 in the left-right direction and support the first and second fixed electrodes 2WKD, 3WKD of the busbar side disconnector DS2W and the transformer side disconnector DS3W, respectively.
  • the gas-insulated switchgear 101 also includes first and second support members 40f, 40g that support the first and second movable electrodes 2WMD, 3WMD, respectively, so as to be aligned with the first and second fixed electrodes 2WKD, 3WKD in the left-right direction, and linear first and second connecting conductors C2W, C3W that connect the busbar conductor BDW to the first and second movable electrodes 2WMD, 3WMD, respectively.
  • the internal structure of the busbar container 40 and the arrangement positions of the first and second insulating spacers 40d, 40e can be 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 diagonally with respect to the up-down direction within the busbar container 40.
  • the bus conductor BDW in three phases, for example the W phase, can be connected to the first and second movable 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 the shortest dimensions, as shown in FIG. 6. Therefore, in this embodiment, it is possible to configure a gas-insulated switchgear 101 that can reduce the dimensions in the vertical direction and can be made compact. Furthermore, in this embodiment, since the gas-insulated switchgear 101 that can be made compact is used, it is possible to configure a power receiving and substation facility 300 that can be made compact.
  • the first connecting conductors C2U, C2V, C2W and the second connecting conductors C3U, C3V, C3W are each provided along the above-mentioned oblique direction, which is a direction inclined at a predetermined angle with respect to the vertical direction.
  • the vertical dimension of the gas-insulated switchgear 101 can be reduced, and the gas-insulated switchgear 101 can be reliably made compact.
  • the first connecting conductor C2U and the second connecting conductor C3U of the U phase provided on either side in the front-to-rear direction have a dimension longer than the other two phases, that is, 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.
  • the first and second connecting conductors C2U, C2V, C2W and C3U, C3V, C3W for three phases can be compactly arranged in the busbar chamber 2, making it easier to make the gas-insulated switchgear 101 compact.
  • the U-phase bus conductor BDU which is provided on either side in the front-rear direction, is located between the first fixed side electrode 2WKD and the second fixed side electrode 3WKD in the up-down direction.
  • the three-phase bus conductors BDU, BDV, and BDW can be compactly arranged in the bus chamber 2, making it easier to make the gas-insulated switchgear 101 compact.
  • the first connecting conductors C2V, C2W of the V-phase and W-phase adjacent in the fore-aft direction, the second connecting conductors C3V, C3W of the V-phase and W-phase, and the bus conductors BDV, BDW of the V-phase and W-phase are each arranged so as to be mirror symmetrical with respect to a plane perpendicular to the fore-aft direction. This makes it possible to more reliably make the gas-insulated switchgear 101 compact in this embodiment.
  • Fig. 8 is a diagram explaining the height dimension of the busbar chamber 2 and the insulation distance inside the busbar chamber 2.
  • Fig. 9 is a diagram explaining the height dimension of the busbar chamber 102 of the gas-insulated switchgear of the comparative example and the insulation distance inside the busbar chamber 102.
  • busbar chamber 102 of a conventional gas-insulated switchgear will be described as a comparative example with reference to FIG. 9.
  • the busbar container 140 constituting the busbar chamber 102 three-phase busbar side disconnectors and three-phase transformer side disconnectors are arranged facing each other in the vertical direction along the front-to-rear direction (direction perpendicular to the paper surface of FIG. 9). In other words, as shown in FIG.
  • the W-phase busbar side disconnector D12W and transformer side disconnector D13W are arranged on one side in the front-to-rear direction within the busbar container 140, and the V-phase and U-phase busbar side disconnectors and transformer side disconnectors are arranged sequentially along the front-to-rear direction.
  • insulating spacers 140d and 140e for leading the W-phase busbar side disconnector D12W and the transformer side disconnector D13W to the outside are provided facing each other in the vertical direction. Also, 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.
  • the busbar side disconnector D12W like the busbar 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.
  • the transformer-side disconnector D13W like the transformer-side disconnector DS3W of this embodiment, 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.
  • busbar side disconnector D12W and the transformer side disconnector D13W are configured so that the three-phase busbar side disconnector and the transformer side disconnector can simultaneously perform a closing or opening operation by operating an operating mechanism (not shown).
  • busbar room 102 similar to busbar room 2, three-phase busbar conductors BDU, BDV, and BDW, each using a straight metal conductor, are provided in the middle position between the busbar side disconnector D12W and the transformer side disconnector D13W in the vertical direction, as shown in FIG. 9.
  • the insulating spacers 140d, 140e are arranged to coincide with the center position of the busbar container 140 in the left-right direction, and these insulating spacers 140d, 140e are arranged symmetrically around the dashed line C3 in FIG. 9, unlike this embodiment.
  • its internal structure and the insulating spacers 140d, 140e are configured to be symmetrical in each of the left-right direction, the front-rear direction, and the up-down direction.
  • the busbar chamber 2 of this embodiment its internal structure and the first and second insulating spacers 40d, 40e are configured to be symmetrical in each of the front-rear direction and the up-down direction, and are configured to be asymmetrical in the left-right direction.
  • 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.
  • the connection structure CP includes first and second connecting conductors C12U, C13U of the U phase, first and second connecting conductors C12V, C13V of the V phase, and first and second connecting conductors C12W, C13W of the W phase.
  • the first and second connecting conductors C12W and C13W are each formed in a crank shape having a straight longitudinal portion parallel to the left and right direction and two straight short portions parallel to the up and down direction, which are provided continuously at one end and the other end of the longitudinal portion, respectively.
  • first connecting conductor C12W one short portion is connected to the bus conductor BDW and the other short portion is connected to the fixed electrode 12WKD of the busbar side disconnector D12W
  • the second connecting conductor C13W one short portion is connected to the bus conductor BDW and the other short portion is connected to the fixed electrode 13WKD of the transformer side disconnector D13W.
  • the first and second connecting conductors C12V and C13V are each formed in a crank shape having a straight longitudinal portion parallel to the left and right direction and two straight short portions parallel to the up and down direction, which are provided continuously at one end and the other end of the longitudinal portion.
  • 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 the busbar side disconnector (not shown)
  • 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 the transformer side disconnector (not shown).
  • the length of the longitudinal portion in the left and right direction is shorter than the length of the longitudinal portion of the first and second connecting conductors C12W and C13W, respectively.
  • the first and second connecting conductors C12U and C13U have linear longitudinal portions that are parallel in the vertical direction.
  • one end of the longitudinal portion is connected to the bus conductor BDU and the other end is connected to the fixed electrode of the busbar side disconnector (not shown)
  • the second connecting conductor C13U one end of the longitudinal portion is connected to the bus conductor BDU and the other end is connected to the fixed electrode of the transformer side disconnector (not shown).
  • 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 of the U, V, and W phases.
  • insulation distance Z13 as the relative insulation distance, for example, when arranging the first connecting conductor C12W of the W phase and the bus conductor BDV of the V phase. It was also necessary to ensure insulation distance Z14 as the interphase insulation distance, for example, when arranging the first connecting conductor C12W of the W phase and the bus conductor BDU of the U phase.
  • 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 inside the bus enclosure 140, taking into account the insulation distances Z12 to Z17 for six layers as the required insulation distance between two phases other than the insulation distances Z11 and Z18 (insulation distance to ground) determined by the rated voltage.
  • the busbar container 40 of this embodiment uses a connection structure C in which the required insulation distance between two phases is inclined diagonally with respect to the vertical direction, as shown in FIG. 8. Specifically, within the busbar container 40, it is necessary to secure insulation distances Z1 and Z6 as the insulation distances to ground, and to place the fixed electrode of the busbar side disconnector and the fixed electrode of the transformer side disconnector against the inner wall surface of the busbar container 40. Note that these insulation distances Z1 and Z6 are the same values as the insulation distances Z11 and Z18 if the rated voltage of the gas-insulated switchgear 101 is the same as that of the comparative example.
  • insulation distance Z2 it is necessary to ensure insulation distance Z2 as the inter-pole insulation distance, for example, when arranging the first U-phase connecting conductor C2U and the first fixed side electrode 2WKD of the W-phase busbar side disconnector DS2W. It is also necessary to ensure insulation distance Z5 as the inter-pole insulation distance, for example, when arranging the second U-phase connecting conductor C3U and the second fixed side electrode 3WKD of the W-phase transformer side disconnector DS3W.
  • insulation distance Z3 as the relative insulation distance, for example, when arranging the first connecting conductor C2U of the U phase and the bus conductor BDV of the V phase.
  • insulation distance Z4 as the interphase insulation distance, for example, when arranging the second connecting conductor C3U of the U phase and the bus conductor BDV of the V phase.
  • the three-phase bus-side disconnectors, three-phase bus conductors BDU, BDV, BDW, and three-phase transformer-side disconnectors can be arranged in the vertical direction inside the bus enclosure 40, taking into account 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.
  • the vertical (height) dimensions can be made smaller than in the comparative example.
  • the height dimension of the busbar room 2 indicated by H1 in FIG. 8 can be made smaller than the height dimension of the busbar room 102 of the comparative example indicated by H2 in FIG. 9 by approximately 7/11.
  • the height dimension of the gas-insulated switchgear 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, and, for example, there may be cases where it is necessary to use a special vehicle such as a low-floor trailer or to transport the gas-insulated switchgear disassembled.
  • the height dimension of the busbar chamber 2 is kept low, thereby keeping the overall height dimension of the gas-insulated switchgear 101 low.
  • the overall height dimension of the gas-insulated switchgear 101 can be kept below the height limit, and the gas-insulated switchgear 101 incorporating the busbar chamber 2 can be transported without using the special vehicle or disassembled transportation.
  • this embodiment can achieve the effect of simplifying the transportation of the gas-insulated switchgear 101 including the busbar chamber 2.
  • the gas-insulated switchgear 101 can be transported in an assembled state, so that on-site installation is possible after the shipping inspection process is completed, and disassembly, on-site assembly, on-site gas processing, on-site inspection, etc. can be omitted, which provides great benefits in terms of transportation, construction time, quality, etc.
  • Fig. 10 is a diagram for explaining an example of the internal configuration of the busbar chamber 2 of the gas-insulated switchgear 101 according to the modified example.
  • the same reference numerals are given to members having the same functions as those described in the above embodiment, and the explanations thereof will not be repeated.
  • the main difference between the modified example and the first embodiment is that in the busbar room 2, 4.
  • the difference is that the phase order of the A-phase and the W-phase is swapped.
  • the U-phase busbar side disconnector DS2U and the U-phase transformer side disconnector DS3U are arranged to face each other in the up-down direction at the front side in the front-to-back direction.
  • the V-phase and W-phase busbar side disconnectors are arranged in sequence along the front-to-back direction from the busbar side disconnector DS2U.
  • the V-phase and W-phase transformer side disconnectors are arranged in sequence along the front-to-back direction from the transformer side disconnector DS3U.
  • V-phase and W-phase busbar side disconnectors and the V-phase and W-phase transformer side disconnectors are arranged to face each other in the up-down direction, similar to the U-phase busbar side disconnector DS2U and the U-phase transformer side disconnector DS3U.
  • the busbar side disconnector DS2U includes a first fixed side electrode 2UKD, a first movable side electrode 2UMD, and a first movable side electrode bar 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 bar 2UMR is supported by the first movable side electrode 2UMD so as to be movable in the left-right direction.
  • the busbar side disconnector DS2U In the busbar side disconnector DS2U, as shown in Figure 10, the right end of the first movable electrode rod 2UMR comes into contact with the first fixed electrode rod 2UKD, causing the busbar side disconnector DS2U to be in a closed (closed) state. 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 and separates from the first fixed electrode rod 2UKD, causing the busbar side disconnector DS2U to be in an open (open) state.
  • the transformer side disconnector DS3U has a second fixed side electrode 3UKD, a second movable side electrode 3UMD, and a second movable side electrode bar 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 bar 3UMR is supported by the second movable side electrode 3UMD so that it can move left and right.
  • the right end of the second movable electrode rod 3UMR comes into contact with the second fixed electrode rod 3UKD, causing the transformer side disconnector DS3U to be in a closed state.
  • the right end of the second movable electrode rod 3UMR moves to the left in Figure 10 and separates from the second fixed electrode rod 3UKD, causing the transformer side disconnector DS3U to be in an open state.
  • an operating mechanism (not shown) is connected to the left ends of the first and second movable side electrodes 2UMR and 3UMR.
  • This operating mechanism is also connected to the left ends of the first and second movable side electrodes of the V phase and W phase (not shown), and the operating mechanism operates in response to the operation of the operating device, allowing the busbar side disconnector and the transformer side disconnector for three phases to perform a closing or opening operation collectively.
  • the three-phase bus conductors BDU, BDV, and BDW are provided at a midpoint between the bus-side disconnector DS2U and the transformer-side disconnector DS3U in the vertical direction.
  • connection structure C of the modified example among the three-phase first connecting conductors C2U, C2V, 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, 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.
  • the first and second connecting conductors C2U, C2V, C2W and C3U, C3V, C3W are identical to each other, so that the number of parts of the gas-insulated switchgear 101 can be reduced, and the maintenance and management of the gas-insulated switchgear 101 can be easily performed.
  • 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.
  • these first and second connecting conductors C2W and C3W are formed large 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.
  • the W-phase bus conductor BDW which is the first phase, is located between the first fixed side electrode 2UKD and the second fixed side electrode 3UKD in the vertical direction.
  • the first connecting conductors C2U, C2V of the U and V phases which are adjacent in the front-to-rear direction
  • the second connecting conductors C3U, C3V of the U and V phases and the bus conductors BDU, BDV of the U and V phases are each arranged symmetrically in the left-to-right direction within the busbar chamber 2.
  • first connecting conductors C2U, C2V are arranged symmetrically with respect to a center line connecting the left-right center positions of the first and second support members 40f, 40g, similar to that shown in FIG. 6.
  • second connecting conductors C3U, C3V are arranged symmetrically with respect to the center line.
  • bus conductors BDU, BDV are arranged symmetrically with respect to the center line.
  • the cable head CHD is connected to the inlet pipes 20c and 20d, but the present disclosure is not limited to this.
  • a power receiving bushing may be connected to the inlet pipes 20c and 20d instead of the cable head CHD.
  • a gas-insulated switchgear includes a busbar room, a first disconnector for each phase provided in a first direction in the busbar room, a second disconnector for each phase provided in the first direction in the busbar room, the second disconnector for each phase provided in the busbar room so as to face the first disconnector for each phase in a second direction perpendicular to the first direction in the busbar room, and a busbar conductor for each phase provided at an intermediate position between the first disconnector and the second disconnector for each phase in the second direction.
  • each of the first disconnectors having a first fixed-side electrode, a first movable-side electrode, and a first movable-side electrode bar 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 having a second fixed-side electrode, a second movable-side electrode, and a second movable-side electrode bar 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;
  • the first insulating spacer of each phase 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 draw out the first fixed-side electrode to the outside of the busbar chamber;
  • a second insulating spacer of each phase is arranged to face the first insulating spacer in the second direction, and
  • the second aspect of the gas-insulated switchgear may be the gas-insulated switchgear of the first aspect, in which 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.
  • the above configuration allows the size of the gas-insulated switchgear in the second direction to be reduced, ensuring that the gas-insulated switchgear can be made compact.
  • the gas-insulated switchgear of the third aspect may be the gas-insulated switchgear of the first or second aspect, in which the first connecting conductors of two phases among the three-phase first connecting conductors are members of the same shape, and the second connecting conductors of two phases among the three-phase second connecting conductors are members of the same shape.
  • the above configuration allows the number of parts in the gas-insulated switchgear to be reduced.
  • the fourth aspect of the gas-insulated switchgear may be the gas-insulated switchgear of the third aspect, 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.
  • the above configuration allows the first and second connection conductors for three phases to be arranged compactly within the busbar room, making it easier to make the gas-insulated switchgear more compact.
  • 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.
  • the above configuration allows the three-phase bus conductors to be arranged in a compact manner, making it easier to make the gas-insulated switchgear more compact.
  • the fifth aspect of the gas-insulated switchgear is a gas-insulated switchgear of any one of the third to fifth aspects, in which 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.
  • the first and second connecting conductors for two of the three phases and the bus conductors for those two phases are arranged in the busbar room so as to be mirror symmetrical with respect to a plane perpendicular to the first direction, so that the gas-insulated switchgear can be made more compact with more certainty.
  • the substation equipment of the sixth aspect of the present disclosure includes a gas-insulated switchgear of any one of the first to sixth aspects, a transformer connected to the gas-insulated switchgear, and an instrument transformer for power supply and demand connected to the bus conductor.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Gas-Insulated Switchgears (AREA)
PCT/JP2023/026098 2023-07-14 2023-07-14 ガス絶縁開閉装置及び受変電設備 Pending WO2025017790A1 (ja)

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PCT/JP2023/026098 WO2025017790A1 (ja) 2023-07-14 2023-07-14 ガス絶縁開閉装置及び受変電設備
CN202380098753.8A CN121511535A (zh) 2023-07-14 2023-07-14 气体绝缘开关装置及受变电设备
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55133010U (https=) * 1979-03-15 1980-09-20
JPH0688121U (ja) * 1993-05-28 1994-12-22 日新電機株式会社 ガス絶縁開閉装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55133010U (https=) * 1979-03-15 1980-09-20
JPH0688121U (ja) * 1993-05-28 1994-12-22 日新電機株式会社 ガス絶縁開閉装置

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