CN218919987U - Single-interval three-circuit outlet arrangement structure of HGIS power distribution device - Google Patents

Abstract

The utility model provides a single-interval three-circuit outlet arrangement structure of an HGIS power distribution device, belongs to the technical field of power supply and distribution of power systems, and solves the problem of insufficient space utilization rate of interval outlet arrangement in a traditional 750kV transformer substation; the three-phase power supply comprises a 3/2 breaker wiring part and a double breaker wiring part which are arranged at the same interval and share a first bus and a second bus; the 3/2 circuit breaker wiring part comprises two-circuit incoming and outgoing lines, and the double circuit breaker wiring part comprises one-circuit optional incoming and outgoing line; all HGIS circuit breaker units in the 3/2 circuit breaker wiring part and the double circuit breaker wiring part are sequentially arranged in the same interval space along the same direction; according to the utility model, on the premise of ensuring the electrical safety and operation and maintenance convenience of the 750kV power distribution device, the engineering quantity of the related steel structure frame is not additionally increased, the occupied area of the power distribution device of the 750kV transformer substation with the odd total number of incoming and outgoing lines can be effectively reduced, and the economic benefit is improved.

Description

Single-interval three-circuit outlet arrangement structure of HGIS power distribution device

Technical Field

The utility model belongs to the technical field of power supply and distribution of power systems, and is applied to a transformer substation in the form of HGIS equipment, in particular to a single-interval three-circuit outlet arrangement structure of an HGIS power distribution device.

Background

In the power supply and distribution field, a 750kV transformer substation in the industry usually adopts a metal semi-closed combined electrical appliance, and other devices except a bus, such as a breaker, a disconnecting switch, a current transformer and the like are integrated in an SF6 insulated metal shell and are connected with the bus or an outgoing line through a sleeve; the power device formed in this way is simply referred to as an HGIS device.

In a 750kV transformer substation, a 3/2 breaker wiring scheme is often adopted for a power distribution device, namely 3 breakers are used for 2 outgoing lines, and 1.5 breakers are used for each outgoing line on average; in the 3/2 circuit breaker wiring scheme, a circuit breaker connected to a bus bar side is called an edge circuit breaker, and a circuit breaker located in the middle is called a middle circuit breaker.

In the prior art, according to the difference of the number of the combined arrangement of the HGIS equipment circuit breakers in the string of the 3/2 circuit breaker wiring scheme, the method can be divided into: 3+0 scheme, 2+1 scheme, and 1+1+1 scheme; wherein, 3+0 scheme is: the 3 circuit breakers are arranged in a combined way, the interrupt circuit breakers and the 2 circuit breakers share an outgoing line sleeve, and 4 groups of outgoing line sleeves are arranged in each string of equipment; the 2+1 scheme is as follows: 2 circuit breakers are arranged in a combined way, the circuit breakers and 1 circuit breaker share a wire outlet sleeve, and 5 groups of wire outlet sleeves are arranged in each string of equipment; the 1+1+1 scheme is: each breaker is arranged independently, the interrupt breaker and the side breaker do not share an outlet sleeve, and each string of equipment shares 6 groups of outlet sleeves.

For a power distribution device of a 750kV transformer substation, under the condition that the total number of incoming and outgoing lines is odd in the wiring scheme of the 3/2 circuit breaker, in view of the fact that the current operation unit has higher requirements on the reliability of the wiring of the main transformer, after the wiring scheme of the 3/2 circuit breaker is used for wiring, the remaining 1 circuit lines are outgoing lines or main transformer incoming lines, and a mode that double circuit breakers are respectively connected into two sections of buses is adopted, which is equivalent to using 2 circuit breakers for the incoming and outgoing lines.

For a 750kV transformer substation with 3 main transformers, if the scale of outgoing lines of a 750kV line is even, in order to ensure the reliability of the main transformers as well, the main transformers are connected in series or through double circuit breakers; after the main transformer and the 750kV outgoing line of each circuit are connected in series, the number of the remaining 750kV outgoing line loops is an odd number. When adopting 3/2 circuit breaker wiring scheme, every complete cluster can only connect 2 round 750kV outgoing lines, must have 1 round 750kV outgoing line to fall singly, can not form complete cluster. In the prior art, for this situation, it is common practice to connect the change-over lines to the two-section bus bars through double circuit breakers, respectively; thus, this will also occupy a full 750kV outlet space.

Meanwhile, the arrangement structure of the conventional HGIS equipment adopts a double-layer framework scheme, a 750kV main transformer incoming line and bus framework adopts a low-layer framework, and a 750kV outgoing line and a span line of incoming and outgoing strings adopt a high-layer framework; the main transformer can be led into corresponding strings through a lower layer framework outside the distribution device, then led up to a higher layer framework jumper wire through a jumper wire, and led into the sleeve position of the HGIS equipment in the strings.

In summary, in the existing technology of HGIS equipment of a 750kV transformer substation, a plurality of intervals are designed on the HGIS arrangement structure, and only 3 groups of breaker equipment in one string in 3/2 wiring or 2 groups of breaker equipment in double-breaker wiring are arranged in each interval; for substations with odd incoming and outgoing line scales, the space under the incoming line of the lower-layer framework of the main transformer is not utilized enough; for the last outlet interval at the tail end, when the double-circuit breaker wiring is adopted for dealing, the space utilization is also insufficient; under different conditions, the space under-utilized interval appears, but the interval cannot be omitted according to the prior art; therefore, the conventional HGIS equipment arrangement structure solves the problem of insufficient field utilization rate of the power distribution device when the total number of incoming and outgoing lines is odd; the problem affects the design construction and operation and maintenance development of the transformer substation, affects the economic benefit, is unfavorable for the development of the whole power supply and distribution technology from the macroscopic level, and is a problem to be solved in the development of the power system because the transformer substation is large in occupied area and high in economic cost, so that the transformer substation is improved to obtain better utilization rate of the structural space of the transformer substation.

Disclosure of Invention

In order to solve the problem of space utilization rate in the background technology, the utility model provides a single-interval three-circuit wire outlet arrangement structure applied to an HGIS equipment distribution device in a 750kV transformer substation, and the engineering quantity of a related steel structure frame is not additionally increased on the premise of ensuring the electrical safety and operation and maintenance convenience of the 750kV distribution device; through arranging a complete string of 3/2 wiring and a complete unit of double-circuit breaker wiring in the interval of a single 750kV HGIS equipment distribution device, the purpose of single interval three-circuit wire outlet is realized, thus the occupied area of the 750kV transformer substation distribution device with the total number of wire inlet and outlet being odd can be effectively reduced, the engineering construction investment cost is further increased, and the economic benefit is further improved.

The utility model adopts the following technical scheme to achieve the purpose:

a kind of HGIS distribution equipment single interval three-circuit outlet arrangement structure, including arranging in the identical interval, 3/2 breaker wiring part and double circuit breaker wiring part which shares a bus and two buses; the 3/2 circuit breaker wiring part comprises two-circuit incoming and outgoing lines; the double-circuit breaker wiring part comprises a first-circuit optional incoming and outgoing line; all HGIS circuit breaker units in the 3/2 circuit breaker wiring part and the double circuit breaker wiring part are sequentially arranged in the space inside the interval along the same direction.

The application object of the scheme is that the typical HGIS transformer substation with the total number of 750kV incoming and outgoing lines being odd is provided with a plurality of strings of outgoing line intervals, the traditional 3/2 circuit breaker wiring scheme can be normally adopted by other intervals except for the single-interval three-circuit outgoing line arrangement in which part of the intervals adopt the scheme, for example, the first string of outgoing line intervals are occupied by the incoming line and the eastward outgoing line of the main transformer, the total two-circuit incoming and outgoing lines are occupied, and the second string of outgoing line intervals adopt the single-interval three-circuit outgoing line arrangement.

Further, the two-circuit incoming and outgoing line of the 3/2 circuit breaker wiring part comprises a first main transformer incoming line and a first line outgoing line; the HGIS breaker unit of the 3/2 breaker wiring part comprises a mother side breaker, two mother side breakers and an interrupt breaker; the first main transformer incoming line is connected to a position between the two bus-side circuit breakers and the interrupt circuit breaker; the first line outgoing line is connected to a position between the female side circuit breaker and the interrupt circuit breaker, and is simultaneously connected with various outgoing line devices such as PT, a lightning arrester, a high-impedance device and the like for outgoing lines.

Further, the first-pass optional inlet and outlet line comprises a second main transformer inlet line or a second line outlet line; the HGIS breaker unit of the double-breaker wiring part comprises a female side breaker and two female side breakers; the first-circuit optional incoming and outgoing line is connected between a female-side circuit breaker and two female-side circuit breakers.

Specifically, the connection line between the HGIS breaker unit and the incoming and outgoing lines is also provided with an HGIS outgoing line sleeve.

Specifically, an HGIS branch line is also arranged on the connecting line between the HGIS outlet sleeve and the HGIS circuit breaker unit; a plurality of bending modules are arranged on the HGIS branch pipe line; in the wiring part of the 3/2 circuit breaker, the HGIS circuit breaker unit adopts a line side wire outlet, the arrangement scheme is similar to a half C shape, the primary side circuit breaker and the interrupt circuit breaker are connected with the wire outlet position, the wire outlet position outside the bus is led to through the HGIS branch line, and then the wire outlet is carried out through the HGIS wire outlet sleeve; the HGIS outlet sleeve is aligned with the HGIS breaker unit, and the HGIS branch line is bent by horizontal bending and vertical bending to realize semi-C-shaped bending and bending of the road in the passing station.

In the 3/2 circuit breaker wiring part, the HGIS circuit breaker unit can adopt 3+0, 2+1, 1+1+1 scheme, preferably a 2+1 scheme, because compared with the 1+1+1 scheme, the scheme can save 1 group of HGIS wire outlet sleeves of 750kV, and has better maintenance flexibility compared with the 3+0 scheme.

Specifically, the HGIS wire outlet sleeve comprises a female side HGIS wire outlet sleeve and a two female side HGIS wire outlet sleeve which are arranged at the 3/2 circuit breaker wiring part and the double circuit breaker wiring part, and further comprises a double circuit breaker HGIS wire outlet sleeve which is arranged at the double circuit breaker wiring part only.

Further, the first main transformer incoming line, the second main transformer incoming line, the first line outgoing line and the second line outgoing line are all carried by a layered steel framework, and the layered steel framework comprises a low-layer framework and a high-layer framework; the steel beam direction of the low-layer framework is parallel to the arrangement direction of the HGIS breaker units, and the low-layer framework is used for bearing a first main transformer incoming line, a second main transformer incoming line, a first bus and a second bus; the steel beam direction of the high-rise framework is perpendicular to the arrangement direction of the HGIS breaker units, and the high-rise framework is used for bearing the first line outgoing line, the second line outgoing line and the overline.

Specifically, a primary optional incoming and outgoing line in the double-circuit breaker wiring part is a second main transformer incoming line, the second main transformer incoming line is mounted below the steel beam of the low-layer framework, and the incoming line direction of the second main transformer incoming line is perpendicular to the arrangement direction of the HGIS breaker unit; the double-circuit breaker HGIS wire outlet sleeve is arranged at a public end between the first female side circuit breaker and the second female side circuit breaker, and the second main transformer wire inlet is connected with the first female side circuit breaker and the second female side circuit breaker through the double-circuit breaker HGIS wire outlet sleeve.

Specifically, a back optional incoming line and outgoing line in the double-circuit breaker wiring part is a second line outgoing line, the second line outgoing line is mounted below the steel beam of the high-rise framework, and the outgoing line direction of the second line outgoing line is parallel to the arrangement direction of the HGIS breaker unit; the double-circuit breaker HGIS wire outlet sleeve is arranged at one end of the one-bus-side circuit breaker, which is far away from the two-bus-side circuit breakers, and the second line wire outlet is connected with the double-circuit breaker HGIS wire outlet sleeve; one end, far away from the first bus side breaker, of the second bus side breaker is connected with the second bus through the second bus side HGIS outlet sleeve, and one end, close to the first bus side breaker, of the second bus side breaker is connected to the double circuit breaker HGIS outlet sleeve through the HGIS branch line; a female side HGIS wire outlet sleeve is arranged between the female side circuit breaker and the two female side circuit breakers, and the female side HGIS wire outlet sleeve is connected with one end of the female side circuit breaker, which is close to the two female side circuit breakers.

Specifically, when the first-circuit selectable incoming and outgoing line is a second-circuit outgoing line, the second main transformer incoming line is not mounted below the corresponding low-layer framework, and a transition bus is mounted instead; the transition bus is connected with a bus through a jumper wire, and the transition bus is also connected with one end, close to the two bus side circuit breakers, of the bus side circuit breaker through a bus side HGIS outlet sleeve.

In a comprehensive way, in the single-interval three-circuit outlet arrangement structure, the outlet of the double-circuit breaker wiring part can adapt to two different modes of inlet and outlet of the main transformer according to actual requirements, so that the effect that the double-circuit breaker wiring part bears one-circuit inlet and outlet is realized, and meanwhile, the space utilization is optimized.

In the double circuit breaker wiring part, the HGIS circuit breaker unit can adopt 2+0, 1+1 scheme, preferably 2+0 scheme, and 1 group of HGIS wire outlet sleeve of 750kV can be saved.

In summary, by adopting the technical scheme, the utility model has the following beneficial effects:

after the single-interval three-circuit outlet arrangement structure is adopted, the utility model reasonably utilizes the vacant position below the low-layer framework of the main transformer inlet wire of the 750kV HGIS power distribution device, and the original double-circuit breaker wiring occupies a complete interval of the 750kV HGIS power distribution device independently, and is combined into the same interval in the 3/2 wiring string of the main transformer inlet wire on the premise of meeting the electric safety and space planning; the arrangement structure enables the main transformer incoming line interval to be simultaneously provided with the complete 3/2 wiring strings and the double-circuit breaker wiring units, and directly saves the occupation size of a complete interval on the premise of not increasing additional investment or reconstruction cost. Therefore, the utility model can be widely used for HGIS substations with odd total numbers of incoming and outgoing lines of the 750kV power distribution device, and brings remarkable economic benefit improvement, and the area required by new space expansion and re-analysis on the occupied area is not needed in the expansion and development process of the substations.

Drawings

FIG. 1 is a schematic illustration of a single-gap three-pass line arrangement of the present utility model;

FIG. 2 is a schematic diagram of a conventional substation arrangement connection;

FIG. 3 is a plan view of a conventional substation arrangement;

FIG. 4 isbase:Sub>A cross-sectional view of the arrangement in the position A-A of FIG. 3;

fig. 5 is a plan view of a 3/2 circuit breaker wiring portion arrangement of the present utility model;

fig. 6 is a plan view of a wiring portion arrangement structure of the double circuit breaker of the present utility model;

FIG. 7 is a plan view of an arrangement of the present utility model employing a main transformer line approach;

FIG. 8 is a cross-sectional view of the arrangement in the position B-B of FIG. 7;

FIG. 9 is a plan view of the arrangement of the present utility model when a line outlet scheme is employed;

fig. 10 is a cross-sectional view of the arrangement at position C-C in fig. 9.

The meaning of the symbols in the drawings is specifically as follows:

11-one-bus side circuit breaker, 12-interrupt circuit breaker, 13-two-bus side circuit breaker, 14-post insulator, 15-tubular bus bar, 16-one-bus side HGIS outlet sleeve, 17-two-bus side HGIS outlet sleeve, 18-HGIS branch line, 19-two-circuit breaker HGIS outlet sleeve, 21-one-bus side circuit breaker, 22-two-bus side circuit breaker, 23-jumper, 31-low-layer frame, 32-high-layer frame, 41-one bus bar, 42-two bus bar, 43-main transformer inlet wire, 44-line outlet wire, 45-jumper wire, 46-down-lead, 47-transition bus bar, 51-transportation road intersection.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In order to more clearly illustrate the difference between the arrangement mode of the embodiment and the conventional arrangement, the arrangement of the conventional HGIS transformer substation will be described in detail first.

As shown in FIG. 2, a traditional 750kV transformer substation is provided with 3 main transformers which can be numbered as #1, #2 and #3 main transformers; the total line outgoing line 44 of 750kV is 6 times, wherein the line outgoing line is 3 times to the east and 3 times to the west, so that the total number of the incoming line and outgoing line of the transformer substation is 9 times and is odd; the 3-turn western outgoing line is provided with a high-voltage shunt reactor; in the 3/2 circuit breaker wiring scheme adopted by the 750kV power distribution device in fig. 2, three main transformers are respectively connected into a first interval, a second interval and a third interval of the 750kV power distribution device, and are respectively correspondingly connected with a 1-circuit line outgoing line 44 in series.

After 3 main transformers are connected with 3 loop line outgoing lines 44 in series, 2 loop line outgoing lines 44 in the remaining 3 loop line outgoing lines 44 are connected in series and arranged in a fourth interval; the remaining 1-circuit outgoing lines 44 of the drop list are arranged in the fifth interval in a double-circuit breaker wiring mode.

The detailed structural plane of the conventional arrangement described above can be seen in the schematic of fig. 3; in the section of fig. 4, it can be seen that the main transformer is fed through the lower frame 31 outside the switchgear to the corresponding string and then up to the jumper 23 of the upper frame 32 by the jumper 45, to the bushing location of the HGIS equipment within the string.

Thus, conventional HGIS arrangements only arrange 3/2 wiring 3 groups of breaker devices in a string or 2 groups of breaker devices in a double breaker wiring per bay. For substations with odd line-in and line-out specifications, the space under the main transformer incoming line (for example # 3) low-layer framework incoming line is not utilized enough; for the last outlet interval at the tail end, double circuit breakers are adopted for wiring, and space utilization is also insufficient. In the conventional HGIS arrangement structure, for the case that the total number of incoming and outgoing lines is odd, the utilization rate of the distribution device field is insufficient.

Example 1

The embodiment specifically describes the single-interval three-pass line-in and line-out arrangement structure of the utility model.

As shown in fig. 1, a single-interval three-circuit outlet arrangement structure of an HGIS distribution apparatus includes a 3/2 circuit breaker wiring portion and a double circuit breaker wiring portion arranged in the same interval, sharing a first bus 41 and a second bus 42; the 3/2 circuit breaker wiring part comprises two-circuit incoming and outgoing lines; the double-circuit breaker wiring part comprises a round of optional incoming and outgoing lines; all HGIS circuit breaker units in the 3/2 circuit breaker wiring part and the double circuit breaker wiring part are sequentially arranged in the inside of the interval space along the same direction.

Referring to the example of fig. 1, the second interval in fig. 1 includes 5 HGIS breaker units in total, which are actually arranged in the same horizontal direction, and the positions in fig. 1 are drawn for convenience in representing the connection relationship. See the arrangement of the HGIS circuit breaker unit through the cross section of fig. 8 or 10. In fig. 1, in the double circuit breaker wiring portion, the #1 main transformer incoming line and the eastward outgoing line 4 do not exist at the same time, but exist only in an alternative manner, and the example in the drawing represents that the connection points of the two incoming and outgoing lines are all located at the same position in the double circuit breaker wiring portion, and the present embodiment describes the case when the #1 main transformer incoming line exists, and the transformer substation at this time includes 3 main transformer incoming lines and 6 loop outgoing lines 44, and 9 loop incoming and outgoing lines in total.

As shown in fig. 8, in the present embodiment, the primary incoming and outgoing line used in the double circuit breaker wiring section is the main transformer incoming line 43; in fig. 8, the HGIS distribution equipment area is provided with layered steel frameworks, including a lower framework 31 and a higher framework 32, and a single-interval three-circuit line structure is provided with 4 lower frameworks 31 and 4 higher frameworks 32 in total; the lower frame 31 is parallel to the cross-sectional direction of fig. 8, and is sequentially from left to right along the B-B cross-section: a parent frame, #2 main transformer wire-feeding frame, two parent frames, #1 main transformer wire-feeding frame.

The high-rise frame 32 is perpendicular to the cross section direction of fig. 8, and the hanging points of the left and right outermost high-rise frames 32 can be used for hanging 750kV line outgoing lines 44, and the hanging points of the other high-rise frames are used for hanging the overline 23.

Insulator string hanging points are arranged at the beam bottom of the lower-layer framework 31 and are used for hanging main transformer incoming wires in the vertical section direction of the figure 8; v-shaped insulator strings or I-shaped insulator strings can also be adopted to be matched with the soft bus of the suspended split conductor.

The following describes a specific arrangement structure of the 3/2 circuit breaker wiring section in this embodiment.

The 3/2 circuit breaker wiring section, the HGIS circuit breaker unit recommends a 2+1 arrangement scheme in which a female side circuit breaker 11 and an interrupt circuit breaker 12 are arranged between a female frame and a main transformer incoming line frame within the interval, and two female side circuit breakers 13 are arranged within the range of the two female frames. The 2 two bus-side HGIS outlet bushings 17 in the 3/2 wiring are connected by adopting a supporting insulator 14 to support the tubular bus 15.

The 3+0 arrangement scheme can also be adopted, three circuit breakers are arranged in a combined mode, the positions of the first-female-side HGIS wire outlet sleeve 16 are not moved, at the moment, the two-female-side HGIS wire outlet sleeve 17 are combined into one, the positions of the first-female-side HGIS wire outlet sleeve 17 are moved left by about the length of one circuit breaker unit, and then the positions of the second-female-side HGIS wire outlet sleeve 17 are led to the lower parts of the two female frameworks for suspending the second bus 42 through the supporting of the bus 15 by the supporting insulator 14.

Whether the HGIS circuit breaker unit employs a 2+1 or 3+0 arrangement, a female side outlet position between a female side circuit breaker 11 and the interrupt circuit breaker 12 is required to be routed through the HGIS branch line 18 to a female side HGIS outlet sleeve 16 position. The HGIS branch line 18 presents a semi-C-shaped curved arrangement in plan view leading from a female side outlet position to a female side HGIS outlet sleeve 16 position, see the schematic of FIG. 5. Depending on the arrangement, the HGIS branch lines 18 need to be horizontally and vertically bent modules, spanning the in-station transportation road junction 51. Referring to the schematic of FIG. 5, a specific connection of the HGIS branch lines 18 in the space is indicated in plan view

A bus side HGIS outlet bushing 16 is connected to the outlet equipment (PT, arrester, high impedance, etc.) via a tubular bus 15 or split conductor. The 750kV outgoing line is connected to a connecting pipe nut of 750kV outgoing line equipment through a jumper 45 connected with a tension insulator string at the end part of the high-rise framework and a down lead 46 connected with a suspension insulator string at the bottom.

A bus side HGIS outlet bushing 16 is connected to a bus bar 41 by a bus frame suspension tube bus bar, down-lead 46. The #2 main transformer incoming line adopts a transverse incoming line mode of a #2 main transformer incoming line framework suspension pipe bus, and is led down to conductor segments (which can be any positions on a sleeve terminal or a pipe bus 15) which are mutually connected by split conductors and are connected with two bus side HGIS outgoing line sleeves 17. The two-bus-side HGIS outlet bushings 17 are connected to the two bus bars 42 by suspended tubular bus bars, down-leads 46 of the two-bus frame.

The following describes a specific arrangement structure of the double circuit breaker wiring portion in the present embodiment.

In this embodiment, the arrangement structure of the double circuit breaker wiring HGIS is a main transformer line-in scheme, and reference may be made to the right part in fig. 6 and fig. 7 and 8.

And for the main transformer incoming line of the double-circuit breaker wiring, the incoming line scheme of the HGIS circuit breaker is vertical. The HGIS circuit breaker unit 2+0 scheme is recommended. The first-side circuit breaker 21 and the second-side circuit breaker 22 of the HGIS circuit breaker unit are arranged in combination within the range of the #1 main transformer incoming line frame. The double-circuit breaker HGIS wire outlet sleeve 19 is located approximately under the #1 main transformer wire inlet frame, the #1 main transformer is connected to the double-circuit breaker HGIS wire outlet sleeve 19 through a split conductor down-lead 46 through a V-shaped insulator string and a suspension tube parent wire at the beam bottom of the #1 main transformer wire inlet frame. The double circuit breaker HGIS outlet bushing 19 is arranged in the middle of the 3 bushing, a female side breaker 21 is arranged on the right side of the bushing and two female side breakers 22 are arranged on the left side of the bushing.

In the double circuit breaker wiring portion, the two-bus-side HGIS wire outlet bushings 17 support the tube bus 15 through the post insulators 14, and the positions of the two-bus-side HGIS wire outlet bushings 17 are led to the lower part of the two suspended bus bars 42. The two-bus-side HGIS outlet bushings 17 are connected to the two bus bars 42 by suspended tubular bus bars, down-leads 46 of the two-bus frame.

In the double circuit breaker connection section, a bus-side HGIS outlet bushing 16 is led out through a post insulator 14 supporting a tube bus 15. The HGIS position of the double breaker wiring can also be adjusted properly to the right so that the post insulator and the tube bus can also be omitted. The bottom of the beam of the high-rise framework is provided with a suspension insulator string, and the outer side of the beam is provided with a tension insulator string. The higher layer frames communicate via jumpers 23 and jumpers 45. To limit the wind deflection of the wire of the jumper 45 below the high-rise frame, a suspension insulator string is arranged at the bottom of the high-rise frame beam. A bus bar 41 is in electrical communication with the upper frame flying lead 23 via a down lead 46 to the upper frame flying lead 23, and at the right end of the upper frame is connected to a bus-side HGIS outlet bushing 16 of the dual breaker wiring section via a jumper 45 and down lead 46.

Through the arrangement mode, for the same-scale 750kV HGIS transformer substation with 3 main transformers and 6 return wires, the embodiment reduces the interval number of the 750kV HGIS distribution devices from 5 to 4, and reduces the occupied area by about 5000m ² . The distribution device arrangement plane of the substation of this embodiment is shown in fig. 7.

Example 2

On the basis of embodiment 1, this embodiment describes another specific arrangement structure of the double circuit breaker wiring portion.

In this embodiment, the arrangement structure and details of the 3/2 circuit breaker wiring portion in this embodiment are the same as those of embodiment 1, and are not described in detail. In fig. 1, only the line outgoing line 44 exists in the double circuit breaker connection part at this time, and the transformer substation of the embodiment includes a 2-circuit main transformer incoming line 43 and a 5-circuit line outgoing line 44, and the total number of the 7-circuit incoming lines are also odd-circuit.

In this embodiment, the arrangement structure of the dual breaker wiring HGIS is a wiring outlet 44 scheme, see the left part in fig. 6 and fig. 9 and 10.

And for outgoing lines of the double-circuit breaker wiring line, the incoming line scheme of the HGIS circuit breaker is parallel. The HGIS circuit breaker unit 2+0 scheme is also recommended. The combination of the primary-side breaker 21 and the secondary-side breaker 22 is arranged within the range of the main-transformer-line-in-line frame originally #1 in embodiment 1, in which case the lower-layer frame is the transition bus 47 frame. The double breaker HGIS outlet bushings 19 of the double breaker wiring section are arranged at outer positions close to the outgoing lines, directly connected to a female side breaker 21, where a female side HGIS outlet bushing 16 is arranged below the frame of the transition bus 47. The two-bus-side circuit breaker 22 is disposed on the left side of the one-bus-side circuit breaker 21, and the two-bus-side HGIS outlet bushings 17 of the two-bus-side circuit breaker 22 are disposed near the side of the suspended two bus bars 42. At the outgoing line side position of the two female side breakers 22, a C-like shape is horizontally bent by the HGIS branch line 18, and at the position of the double breaker HGIS outgoing line sleeve 19 leading to one female side breaker 21, reference is made to the left-hand part illustration in fig. 6.

The HGIS outgoing line side sleeve of the double circuit breaker wiring portion is connected to outgoing line devices (PT, lightning arrester) through a tubular bus bar 15. The 750kV outgoing line is connected to the 750kV outgoing line equipment connecting pipe bus through a jumper 45 connected with the tension insulator string at the end part of the high-rise framework, and a down lead 46 connected with the suspension insulator string at the bottom.

The two-bus-side HGIS outlet bushings 17 of the double circuit breaker wiring portion support the tubular bus 15 through the post insulators 14, and the positions of the two-bus-side HGIS outlet bushings 17 are led to the lower part of the two suspended bus bars 42. The two-bus-side HGIS outlet bushings 17 are connected to the two bus bars 42 by two-bus frame suspension tube bus bars, down-lead wires 46.

The high-rise frame 32 communicates via the flying lead 23 and the jumper 45, and a bus bar 41 is in electrical communication with the flying lead 23 of the high-rise frame 32 via a down-lead 46 with the flying lead 23 of the high-rise frame 32. Between the two high-rise frames 32 at the right-hand end, a transition busbar 47 frame in the low-rise frame is provided. In order to reduce the stress effect of the wind deflection of the high-level jumper 23 on the bus-side HGIS outlet sleeve 16 of the double-circuit breaker wiring, the high-level jumper 23 is firstly led to the transition bus 47 suspended by the framework of the low-level transition bus 47 through the split conductor down-lead 46, and then led to the bus-side HGIS outlet sleeve 16 through the split conductor down-lead 46. Under the condition of verifying that the stress of the bus-side HGIS outlet sleeve 16 meets the condition, the framework of the low-layer transition bus 47, the suspension transition bus 47 and the split conductor down-lead 46 can also be omitted, and the split conductor down-lead 46 is directly led to the bus-side HGIS outlet sleeve 16 at the proper position of the high-layer overline 23.

After the arrangement structure of the double circuit breaker wiring part of the embodiment is adopted, the distribution device arrangement plane of the HGIS transformer substation is shown in fig. 9.

Claims (10)

1. A HGIS distribution device list interval three return wire arrangement structure which characterized in that: the bus-bar switching device comprises a 3/2 breaker wiring part and a double breaker wiring part which are arranged in the same interval and share a first bus bar and a second bus bar; the 3/2 circuit breaker wiring part comprises two-circuit incoming and outgoing lines; the double-circuit breaker wiring part comprises a first-circuit optional incoming and outgoing line; all HGIS circuit breaker units in the 3/2 circuit breaker wiring part and the double circuit breaker wiring part are sequentially arranged in the space inside the interval along the same direction.

2. The single-bay three-pass line arrangement of an HGIS power distribution unit according to claim 1, wherein: the two-circuit incoming and outgoing line of the 3/2 circuit breaker wiring part comprises a first main transformer incoming line and a first line outgoing line; the HGIS breaker unit of the 3/2 breaker wiring part comprises a mother side breaker, two mother side breakers and an interrupt breaker; the first main transformer incoming line is connected to a position between the two bus-side circuit breakers and the interrupt circuit breaker; the first line outgoing line is connected to a position between the female side circuit breaker and the interrupt circuit breaker.

3. The single-bay three-pass line arrangement of an HGIS power distribution unit according to claim 2, wherein: in the double-circuit breaker wiring part, the first-circuit optional incoming and outgoing line comprises a second main transformer incoming line or a second line outgoing line; the HGIS breaker unit of the double-breaker wiring part comprises a female side breaker and two female side breakers; the first-circuit optional incoming and outgoing line is connected between a female-side circuit breaker and two female-side circuit breakers.

4. A single-bay three-pass line arrangement for an HGIS power distribution unit according to claim 3, wherein: and an HGIS outlet sleeve is also arranged on the connecting line of the HGIS circuit breaker unit and the inlet and outlet.

5. The single-bay three-pass line arrangement for an HGIS power distribution unit according to claim 4, wherein: an HGIS branch line is also arranged on the connecting line between the HGIS outlet sleeve and the HGIS breaker unit; and a plurality of bending modules are arranged on the HGIS branch pipe line.

6. The single-bay three-pass line arrangement of an HGIS power distribution unit according to claim 5, wherein: the HGIS wire outlet sleeve comprises a first-side HGIS wire outlet sleeve and a second-side HGIS wire outlet sleeve which are arranged on the 3/2 circuit breaker wiring part and the double circuit breaker wiring part, and further comprises a double circuit breaker HGIS wire outlet sleeve which is arranged on the double circuit breaker wiring part only.

7. The single-bay three-pass line arrangement of an HGIS power distribution unit according to claim 6, wherein: the first main transformer incoming line, the second main transformer incoming line, the first line outgoing line and the second line outgoing line are all carried by a layered steel framework, and the layered steel framework comprises a low-layer framework and a high-layer framework; the steel beam direction of the low-layer framework is parallel to the arrangement direction of the HGIS breaker units, and the low-layer framework is used for bearing a first main transformer incoming line, a second main transformer incoming line, a first bus and a second bus; the steel beam direction of the high-rise framework is perpendicular to the arrangement direction of the HGIS breaker units, and the high-rise framework is used for bearing the first line outgoing line, the second line outgoing line and the overline.

8. The single-bay three-pass line arrangement for an HGIS power distribution unit according to claim 7, wherein: the first-circuit selectable incoming and outgoing line in the double-circuit breaker wiring part is a second main transformer incoming line, the second main transformer incoming line is mounted below the steel beam of the low-layer framework, and the incoming line direction of the second main transformer incoming line is perpendicular to the arrangement direction of the HGIS breaker unit; the double-circuit breaker HGIS wire outlet sleeve is arranged at a public end between the first female side circuit breaker and the second female side circuit breaker, and the second main transformer wire inlet is connected with the first female side circuit breaker and the second female side circuit breaker through the double-circuit breaker HGIS wire outlet sleeve.

9. The single-bay three-pass line arrangement for an HGIS power distribution unit according to claim 7, wherein: the first-circuit selectable incoming and outgoing line in the double-circuit breaker wiring part is a second line outgoing line, the second line outgoing line is hung below the steel beam of the high-rise framework, and the outgoing line direction of the second line outgoing line is parallel to the arrangement direction of the HGIS breaker unit; the double-circuit breaker HGIS wire outlet sleeve is arranged at one end of the one-bus-side circuit breaker, which is far away from the two-bus-side circuit breakers, and the second line wire outlet is connected with the double-circuit breaker HGIS wire outlet sleeve; one end, far away from the first bus side breaker, of the second bus side breaker is connected with the second bus through the second bus side HGIS outlet sleeve, and one end, close to the first bus side breaker, of the second bus side breaker is connected to the double circuit breaker HGIS outlet sleeve through the HGIS branch line; a female side HGIS wire outlet sleeve is arranged between the female side circuit breaker and the two female side circuit breakers, and the female side HGIS wire outlet sleeve is connected with one end of the female side circuit breaker, which is close to the two female side circuit breakers.

10. The single-bay three-pass line arrangement for an HGIS power distribution unit according to claim 9, wherein: when the first-circuit selectable incoming and outgoing line is a second-circuit outgoing line, the second main transformer incoming line is not mounted below the corresponding low-layer framework, and a transition bus is mounted instead; the transition bus is connected with a bus through a jumper wire, and the transition bus is also connected with one end, close to the two bus side circuit breakers, of the bus side circuit breaker through a bus side HGIS outlet sleeve.

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