GIS (Gas Insulated Switchgear) between main bus and branch bus and capable of being overhauled without power failure

Abstract

The invention belongs to the field of large power transmission and distribution, and discloses a GIS (Gas Insulated Switchgear) between a main bus and a branch bus capable of being overhauled without power interruption, which comprises two bus access cylinders, an incoming and outgoing line interval cylinder, two incoming line isolation cylinders, a bypass cylinder and a bypass isolation cylinder, and is characterized in that the two bus access cylinders respectively accommodate a first incoming line and a second incoming line; the first incoming line and the second incoming line are electrically connected with the double buses respectively, the incoming and outgoing line interval cylinder is provided with a conduction end electrically connected with a branch bus, an interval circuit breaker is accommodated in the incoming and outgoing line interval cylinder, and a first isolation switch and a second isolation switch are accommodated in the two incoming line isolation cylinders respectively. One side of the first isolating switch and one side of the second isolating switch are correspondingly and electrically connected with the first incoming line and the second incoming line respectively, the other sides of the first isolating switch and the second isolating switch are electrically connected with the interval circuit breaker, the bypass bus is contained in the bypass barrel, the bypass isolating switch is contained in the bypass isolating barrel, and one end of the bypass bus is selectively and electrically connected with the double buses. And the other end is electrically connected with the conduction end through the bypass isolation switch.

Description

Technical Field

[0001] The invention belongs to the field of large-scale power transmission and distribution, and in particular relates to a GIS between main and bus lines which can be repaired without power failure. Background Art

[0002] The double-busbar GIS allows the power supply and outgoing lines to be evenly distributed on two sets of buses. It can adopt the dual-busbar simultaneous operation mode or the single-busbar segmented operation mode. This flexibility enables the power system to adjust the operation mode according to demand and adapt to different load and power supply conditions.

[0003] At present, the implementation method of double-busbar connection GIS is as follows: the double busbars are led out through disconnectors respectively, and an electrically conductive connecting line is connected between the incoming and outgoing lines, so that when one set of busbars fails, the other set of busbars can still be replaced by the on-off operation of two disconnectors.

[0004] However, when the above-mentioned GIS is used in a large-scale power transmission and distribution system, a circuit breaker switch is connected in series on the conductive connection line within the double busbar inlet and outlet intervals. If the circuit breaker switch needs to be repaired, the conductive connection line needs to be disabled, thus affecting the use of the double busbar connection GIS. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a main busbar GIS that can be maintained without power failure. When suitable for large-scale power transmission and distribution systems, it can maintain the function of the double busbar GIS while maintaining the circuit breaker switch on the above-mentioned conductive connecting line.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A GIS between main and busbars that can be maintained without power failure is used to electrically connect a double busbar with a branch busbar, and is characterized in that it includes: two busbar access cylinders, respectively accommodating a first incoming line and a second incoming line, the first incoming line and the second incoming line are electrically connected to the double busbars respectively, an incoming and outgoing line interval cylinder, having a conduction end electrically connected to the branch busbar, the incoming and outgoing line interval cylinder accommodating an interval circuit breaker, two incoming line isolation cylinders, respectively accommodating a first isolating switch and a second isolating switch, one side of the first isolating switch and the second isolating switch are electrically connected to the first incoming line and the second incoming line respectively, and the other side is electrically connected to the interval circuit breaker, wherein the GIS between main and busbars that can be maintained without power failure also includes a bypass cylinder and a bypass isolation cylinder, the bypass cylinder accommodates a bypass busbar, the bypass isolation cylinder accommodates a bypass isolating switch, one end of the bypass busbar is selectively electrically connected to the double busbars, and the other end is electrically connected to the conduction end through the bypass isolating switch.

[0008] Preferably, the present invention also includes a first connecting cylinder, a second connecting cylinder and a spacing isolation cylinder, the spacing isolation cylinder accommodates an interval isolating switch, and the GIS between the main and busbars that can be maintained without power failure has a structural length direction and a structural height direction, the two busbar access cylinders and the in-and-out line spacing cylinders are distributed along the structural height direction, the in-and-out line spacing cylinders extend along the structural length direction, and form relative access ends and conduction ends, wherein the first connecting cylinder and the second connecting cylinder are both arranged along the structural height direction, and both have a pair of upper through-coupling inlets and lower coupling outlets, the spacing isolation cylinder is arranged along the structural height direction, the first connecting cylinder is respectively connected with the two busbar access cylinders through the upper through-coupling inlets, and is connected with the access end through the lower coupling outlet; the second connecting cylinder is respectively introduced into the branch bus through the upper through-coupling inlet and is connected with the other end of the bypass cylinder, and is connected with one end of the spacing isolation cylinder through the lower coupling outlet, and the other end of the spacing isolation cylinder is connected with the conduction end.

[0009] Furthermore, the present invention also includes three grounding switches, the bypass bus is grounded through a grounding switch; the first isolating switch and the second isolating switch are both grounded through a grounding switch; and the interval circuit breaker is grounded through a grounding switch.

[0010] Furthermore, the GIS between the main and busbars that can be maintained without power failure also has a structural width direction, and the two busbar access cylinders are distributed along the structural width direction and are parallel to each other.

[0011] Furthermore, the present invention also includes two busbar introduction cylinders for accommodating the first incoming line and the second incoming line. The two busbar introduction cylinders extend along the width direction of the structure, correspondingly connecting the two busbar access cylinders, and the two busbar introduction cylinders are respectively located on opposite sides of the busbar access cylinder along the height direction of the structure.

[0012] Furthermore, the number is three, corresponding to the three phases respectively.

[0013] Furthermore, the number is multiple groups, each group consists of three, and the busbar introduction cylinders of each group of GIS between the main busbars that can be maintained without power failure are distributed along the length direction of the structure and are parallel to each other, the bypass busbar of each group of GIS between the main busbars that can be maintained without power failure corresponds to the same electrical connection in the double busbars, and the bypass busbars of multiple groups of GIS between the main busbars that can be maintained without power failure correspond to the two electrical connections of the double busbars.

[0014] Preferably, the incoming and outgoing line interval cylinder also accommodates a first mutual inductor, a second mutual inductor and an interval isolating switch, and the first mutual inductor, the interval circuit breaker, the second mutual inductor and the interval isolating switch are sequentially connected in series and gradually approach the conduction end.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The GIS between the main and sub-busbars of the present invention that can be repaired without power failure comprises two busbar access cylinders, an inlet and outlet line interval cylinder, two inlet line isolation cylinders, a bypass cylinder and a bypass isolation cylinder. The two busbar access cylinders respectively accommodate a first inlet line and a second inlet line, the first inlet line and the second inlet line are respectively electrically connected to the double busbars, the inlet and outlet line interval cylinder has a conducting end electrically connected to the branch busbar, the inlet and outlet line interval cylinder accommodates an interval circuit breaker, and the two inlet line isolation cylinders respectively accommodate a first isolating switch and a second isolating switch, one side of the first isolating switch and the second isolating switch are respectively connected to the first inlet line and the second inlet line. Corresponding to the electrical connection, the other side is electrically connected to the interval circuit breaker, the bypass cylinder accommodates the bypass busbar, the bypass isolation cylinder accommodates the bypass isolating switch, one end of the bypass busbar is electrically connected to the double busbar at one place, and the other end is electrically connected to the conduction end through the bypass isolating switch, that is, the incoming and outgoing line interval accommodates a line equivalent to the aforementioned conductive connecting line. Therefore, when the present invention is applicable to large-scale power transmission and distribution systems, it can maintain electrical connectivity between the busbar connected to the bypass busbar and the incoming and outgoing ends of the system through the electrical connection between the bypass busbar and the conduction end while the interval circuit breaker on the conductive connecting line, that is, the aforementioned circuit breaker switch, is being overhauled.

[0017] 2. Because the present invention also includes a first connecting cylinder, a second connecting cylinder and a spacing isolating cylinder, the spacing isolating cylinder accommodates a spacing isolating switch, and the GIS between the main and busbars that can be repaired without power failure has a structural length direction and a structural height direction, the two busbar access cylinders and the inlet and outlet line spacing cylinders are distributed along the structural height direction, the inlet and outlet line spacing cylinders extend along the structural length direction, and form relative access ends and conduction ends, the first connecting cylinder and the second connecting cylinder are both arranged along the structural height direction, and both have a pair of upper through-coupling inlets and lower coupling outlets, the spacing isolating cylinder is arranged along the structural height direction, and the first connecting cylinder is divided through the upper through-coupling inlet The first connecting cylinder and the second connecting cylinder are connected to the branch bus and the other end of the bypass cylinder respectively through the upper through-coupling inlet, and are connected to one end of the spacing isolation cylinder through the lower coupling outlet, and the other end of the spacing isolation cylinder is connected to the conduction end. Therefore, the present invention realizes the three-dimensional structure of the present invention through the first connecting cylinder, the second connecting cylinder and the spacing isolation cylinder, so that the present invention has a compact structure and a regular configuration. When used in combination, it is convenient for the transformation of large-scale power transmission and distribution systems, and will not affect the combination of power sources and loads on the two sets of busbars, and will not cause power outages in the original circuit.

[0018] 3. Because the present invention also includes two busbar introduction cylinders, the two busbar introduction cylinders are used to accommodate the first incoming line and the second incoming line, and the two busbar introduction cylinders extend along the width direction of the structure, corresponding to the two busbar access cylinders, and the two busbar introduction cylinders are respectively located on the opposite sides of the busbar access cylinder along the height direction of the structure, that is, the busbar introduction cylinder is used to accommodate the first incoming line and the second incoming line led from the busbar to the busbar access cylinder. Therefore, the present invention can easily and accurately identify two groups of busbars in a complex system through the difference in height of the two busbar introduction cylinders, and the structure is compact.

[0019] 4. Because the present invention comprises multiple groups, each group comprises three, and the busbar introduction cylinders of each group of GIS between the main busbars that can be overhauled without power failure are distributed along the length direction of the structure and are parallel to each other, the bypass busbar of each group of GIS between the main busbars that can be overhauled without power failure corresponds to the same electrical connection in the double busbar, and multiple groups of bypass busbars of GIS between the main busbars that can be overhauled without power failure correspond to two electrical connections of the double busbar. Therefore, the present invention ensures that each group of busbars corresponding to the double busbars of each incoming and outgoing line end has a bypass function by being divided into multiple groups. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view of the GIS between the main and denominator lines that can be maintained without power failure according to an embodiment of the present invention;

[0021] Figure 2 A top view of a group of GIS between main and denominator lines that can be maintained without power failure according to an embodiment of the present invention;

[0022] Figure 3 The present invention is a circuit connection diagram of a GIS between main and bus lines that can be maintained without power failure in an embodiment of the present invention.

[0023] In the figure: 100, GIS between main and busbars that can be maintained without power failure, D1, structure length direction, D2, structure width direction, D3, structure height direction, 1, busbar access cylinder, 1a, first incoming line, 1b, second incoming line, 2, incoming line isolation cylinder, 2a, first disconnector, 2b, second disconnector, 3, first connection cylinder, 4, incoming and outgoing line interval cylinder, 41, conduction end, 42, access end, 4a, conductive connecting line, 4b, first mutual inductor, 4c, interval circuit breaker, 4d, second mutual inductor, 5, interval isolation cylinder, 5a, interval disconnector, 6, second connection cylinder, 7, bypass isolation cylinder, 7a, bypass bus, 7b, bypass disconnector, 8, busbar introduction cylinder, 9, grounding switch. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following embodiments and the accompanying drawings specifically illustrate the GIS between the main and denominator lines that can be maintained without power failure of the present invention. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0025] like Figures 1 to 3 As shown, the GIS100 between the main busbars that can be maintained without power failure in this embodiment has a structural length direction D1, a structural width direction D2 and a structural height direction D3, which are used to electrically connect the double busbars with the branch busbars. Specifically, the double busbars (not shown in the drawings) correspond to two groups of busbars, and each group of busbars corresponds to three power transmission and distribution busbars of phase A, phase B and phase C of the three-phase power transmission and distribution.

[0026] The GIS100 between the main and sub-bus lines that can be maintained without power outages includes a busbar access cylinder 1, an incoming line isolation cylinder 2, a first connecting cylinder 3, an incoming and outgoing line interval cylinder 4, an interval isolation cylinder 5, a second connecting cylinder 6, a bypass cylinder, a bypass isolation cylinder 7, a busbar introduction cylinder 8 and a grounding switch 9.

[0027] The number of the busbar access cylinder 1, the incoming line isolation cylinder 2 and the busbar introduction cylinder 8 are all two.

[0028] The two busbar access cylinders 1 and the bypass cylinder, the in-line and out-line spacing cylinder 4 are distributed along the structural height direction and are located at two different heights respectively, and the two busbar access cylinders 1, the in-line and out-line spacing cylinder 4, and the bypass cylinder all extend along the structural length direction D1 and are distributed along the structural width direction D2 and are parallel to each other. Specifically, in the structural width direction D2, the two busbar access cylinders 1 are located on opposite sides of the in-line and out-line spacing cylinder 4, respectively. In the present embodiment, the bypass cylinder selectively shares a cylinder with the two busbar access cylinders 1.

[0029] The number of GIS100 between main busbars without power outage is multiple groups, each group consists of three. The two busbar access cylinders 1 of each main busbar between GIS100 without power outage respectively accommodate the first incoming line 1a and the second incoming line 1b led out from the double busbar, that is, respectively accommodate the first incoming line 1a and the second incoming line 1b led out from the two A phases of the double busbar, the first incoming line 1a and the second incoming line 1b led out from the two B phases, and the first incoming line 1a and the second incoming line 1b led out from the two C phases.

[0030] The bypass cylinder houses a bypass busbar 7 a . In the present embodiment, the bypass busbar 7 a is led out from a node on the first incoming line 1 a or the first incoming line 1 b in the busbar access cylinder 1 .

[0031] The incoming and outgoing line interval cylinder 4 has a conducting end 41 and an access end 42 formed relatively to each other in the structural length direction D1. The conducting end 41 is electrically connected to the branch bus (not shown in the drawings). The incoming and outgoing line interval cylinder 4 accommodates an electrically conductive connecting line 4a, and a first mutual inductor 4b, an interval circuit breaker 4c, and a second mutual inductor 4d sequentially connected in series on the electrically conductive connecting line 4a. The first mutual inductor 4b, the interval circuit breaker 4c, and the second mutual inductor 4d gradually approach the conducting end 41. Specifically, the electrically conductive connecting line 4a electrically connects the conducting end 41 and the access end 42.

[0032] The two incoming line isolation cylinders 2 respectively accommodate the first isolating switch 2a and the second isolating switch 2b. One side of the first isolating switch 2a and the second isolating switch 2b are respectively electrically connected to the first incoming line 1a and the second incoming line 1b, and the other side is electrically connected to the interval circuit breaker 4c through the conductive connecting line 4a.

[0033] The first connecting cylinder 3, the second connecting cylinder 6 and the spacing isolation cylinder 5 are all extended along the structural height direction D2, and the first connecting cylinder 3 and the second connecting cylinder 6 have a pair of upper through-coupling inlets (not shown in the drawings) and lower coupling outlets (not shown in the drawings).

[0034] The first connecting cylinder 3 is connected with the two busbar access cylinders 1 through the upper through-coupling inlet through the incoming line isolation cylinder 2, and is connected with the access end 42 through the lower coupling outlet; the second connecting cylinder 6 is introduced into the branch bus through the upper through-coupling inlet, is connected with the end of the bypass cylinder through the bypass isolation cylinder 7, is connected with one end of the spacing isolation cylinder 5 through the lower coupling outlet, and the other end of the spacing isolation cylinder 5 is connected with the conduction end 41.

[0035] The compartment isolating cylinder 5 accommodates a compartment isolating switch 5a.

[0036] The bypass isolation cylinder 7 accommodates a bypass busbar 7a led out from the bypass cylinder, and a bypass isolation switch 7b connected in series to the bypass busbar, that is, one end of the bypass busbar 7a is selectively electrically connected to the double busbar in the busbar access cylinder 1, and the other end is electrically connected to the conduction end 41 through the bypass isolation switch 7b and the interval isolation switch 5a.

[0037] There are three grounding switches 9, the bypass busbar 7a is grounded through one grounding switch 9; the first isolating switch 2a and the second isolating switch 2b are both grounded through one grounding switch 9; the interval circuit breaker 4c is grounded through one grounding switch. Specifically, correspondingly, one grounding switch 9 is grounded from the intersection node of the conductive connecting line 4a and the bypass busbar 7a; one grounding switch 9 is grounded from the intersection node of the conductive connecting line 4a, the first isolating switch 2a and the second isolating switch 2b; one grounding switch 9 is grounded from the node between the interval isolating switch 5a and the second mutual inductor 4d. In this embodiment, one grounding switch 9 is located on the bypass isolating cylinder 7; one grounding switch 9 is selectively located on the two incoming line isolating cylinders 2; and one grounding switch 9 is located on the interval isolating cylinder 5.

[0038] There are two busbar introduction cylinders 8, both of which extend along the structural width direction D2, correspondingly connecting the two busbar access cylinders 1, and the two busbar introduction cylinders 8 are located on opposite sides of the busbar access cylinder 1 along the structural height direction D3.

[0039] The busbar introduction cylinders 8 of the GIS100 between the three main busbars of each group that can be maintained without power failure are distributed along the structural length direction D1 and are parallel to each other. Specifically, the busbar introduction cylinders 8 of the GIS100 between the main busbars of each group that can be maintained without power failure are staggered along the structural length direction D1 (see Figure 1 From the arrangement of phases A, B and C, it can be seen that the GIS100 between the three main denominators that can be maintained without power failure do not correspond along the structural width direction D2, so that the three pairs of introduction cylinders 8 are staggered along the structural length direction D1).

[0040] The bypass busbar 7a of GIS100 between each group of main busbars that can be maintained without power failure corresponds to the same electrical connection in the double busbar, and the bypass busbar 7a of GIS100 between multiple groups of main busbars that can be maintained without power failure corresponds to two electrical connections in the double busbar.

[0041] Specifically, two groups of GIS100 between the main busbars that can be maintained without power failure are arranged on the double busbars, and the bypass busbar 7a of one group corresponds to being led out from one group of busbars of the double busbars, and the bypass busbar 7a of the other group corresponds to being led out from the remaining group of busbars of the double busbars. When the interval circuit breaker 4c on the conductive connecting line 4a of one or two groups of GIS100 between the main busbars that can be maintained without power failure is repaired or maintained simultaneously, the corresponding interval disconnecting switch 5a can be opened, and the bypass disconnecting switch 7b of at least one or two groups of GIS100 between the main busbars that can be maintained without power failure is closed at the same time, thereby ensuring that one or two groups of busbars are electrically connected with the input and output ends of the system through the bypass busbar 7a.

[0042] The above-mentioned implementation modes are preferred cases of the present invention and are not used to limit the protection scope of the present invention. Various deformations or modifications that can be made by ordinary technicians in this field without creative work within the scope of the attached claims are still within the protection scope of this patent.

Claims

1. A GIS between main and busbars that can be maintained without power failure, used to electrically connect a double busbar to a branch busbar, characterized in that: include: Two busbars are connected to the cylinder, and contain a first incoming line and a second incoming line respectively. The first incoming line and the second incoming line are electrically connected to the double busbars respectively. The inlet and outlet line interval cylinder has a conduction end electrically connected to the branch busbar, and the inlet and outlet line interval cylinder accommodates an interval circuit breaker. The two incoming line isolation cylinders respectively accommodate a first isolating switch and a second isolating switch. One side of the first isolating switch and the second isolating switch are respectively electrically connected to the first incoming line and the second incoming line, and the other side is electrically connected to the interval circuit breaker. Among them, the GIS between the main and busbars that can be maintained without power failure also includes a bypass cylinder and a bypass isolation cylinder. The bypass cylinder accommodates a bypass busbar, and the bypass isolation cylinder accommodates a bypass isolation switch. One end of the bypass busbar is selectively electrically connected to the double busbar, and the other end is electrically connected to the conduction end through the bypass isolation switch.

2. The GIS between main and bus lines capable of non-stop maintenance according to claim 1 is characterized in that: Also includes: a first connecting cylinder, a second connecting cylinder and a spacing isolating cylinder, wherein the spacing isolating cylinder contains a spacing isolating switch, The GIS between the main and busbars that can be maintained without power failure has a structural length direction and a structural height direction. The two busbar access cylinders and the inlet and outlet line spacing cylinders are distributed along the height direction of the structure. The inlet and outlet line spacing cylinder extends along the length direction of the structure and forms an opposite access end and the conduction end. Wherein, the first connecting cylinder and the second connecting cylinder are both arranged along the height direction of the structure, and both have a pair of upper through-coupling inlets and lower coupling outlets, and the spacing isolation cylinder is arranged along the height direction of the structure. The first connecting cylinder is connected to the two bus access cylinders respectively through the upper through-coupling inlet, and is connected to the access end through the lower coupling outlet; the second connecting cylinder is introduced into the branch bus and connected to the other end of the bypass cylinder through the upper through-coupling inlet, and is connected to one end of the spacing isolation cylinder through the lower coupling outlet, and the other end of the spacing isolation cylinder is connected to the conduction end.

3. The GIS between main and bus lines capable of non-stop maintenance according to claim 2 is characterized in that: Also includes: Three earthing switches, The bypass bus is grounded through one of the grounding switches; the first isolating switch and the second isolating switch are both grounded through one of the grounding switches; The bay circuit breaker is grounded via one of the grounding switches.

4. The GIS between main and busbars capable of non-stop maintenance according to claim 2 is characterized in that: in, The GIS between the main and busbars that can be maintained without power failure also has a structural width direction, and the two busbar access cylinders are distributed along the structural width direction and are parallel to each other.

5. The GIS between main and busbars capable of non-stop maintenance according to claim 4 is characterized in that: Also includes: Two busbar introduction cylinders are used to accommodate the first incoming line and the second incoming line, The two busbar introduction cylinders both extend along the width direction of the structure, correspondingly connecting the two busbar access cylinders, and the two busbar introduction cylinders are respectively located on opposite sides of the busbar access cylinders along the height direction of the structure.

6. The GIS between main and denominator lines capable of non-stop maintenance according to claim 5 is characterized in that: The number is three, corresponding to the three phases.

7. The GIS between main and busbars capable of non-stop maintenance according to claim 6 is characterized in that: There are multiple groups, each group consists of three, and the busbar introduction cylinders of the GIS between the main and busbars that can be maintained without power failure in each group are distributed along the length direction of the structure and are parallel to each other. The bypass busbar of each group of GIS between the main busbars that can be maintained without power failure corresponds to the same electrical connection in the double busbars, and the bypass busbars of multiple groups of GIS between the main busbars that can be maintained without power failure correspond to two electrical connections in the double busbars.

8. The GIS between main and busbars capable of non-stop maintenance according to claim 1 is characterized in that: in, The inlet and outlet interval cylinder also contains a first mutual inductor, a second mutual inductor and an interval isolating switch. The first mutual inductor, the bay circuit breaker, the second mutual inductor and the bay isolating switch are sequentially connected in series and gradually approach the conduction end.

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