Patent Description:
As one of the main equipment in a substation, a substation frame is used to suspend and support wires to connect switchgear or other electrical equipment.

Most of current substation frames are a combination of a conventional iron structure and a tension insulator string, a suspension insulator string, and a jumper wire, which have defects such as heavy weight, easy to rust or crack. For substations or converter stations, there are also problems such as large occupation of the conventional substation frame and difficulty in transportation and installation. Therefore, a mature substation frame design is urgently needed to solve the above problems. <CIT> discloses a substation framework used at a transformer substation. <CIT> discloses a support structure for use in a transformer substation. <CIT> discloses a power conversion architecture. <CIT> discloses a hanging board and insulating beam for use in power transmission. <CIT> describes a pole head configured to support conductors on poles for overhead power lines.

The present application provides a substation frame, which can solve the problems of large occupation of the conventional substation frame and difficulty in transportation, installation and maintenance.

An advantageous effect of the present application is that, unlike the prior art, the first supporting part of the support assembly connected to the beam assembly is made of composite insulating material. Since the first supporting part connected to the beam assembly is made of composite insulating material, the first supporting part has excellent electrical insulation performance, thereby reducing the electrical safe distance between wires and the supporting assembly, and in turn effectively reducing the width of the substation frame and the cost of land acquisition. Further, the second supporting part is made of metal material, thereby achieving an effect of reducing the cost. In addition, the supporting assembly of the above-described composite structure is light in weight, not susceptible to rusting and cracking, and accordingly, which solves the problem of difficulty in transportation, installation and maintenance, and reduces the cost of transportation and installation.

In order to illustrate the technical solutions in the present application more clearly, the following will introduce briefly the drawings used in the description of the embodiments. Obviously, the drawings in the following description are merely several embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, in which:.

The technical solutions in the embodiments of the present application will be described clearly and completely hereinafter with reference to the accompanying drawings. Apparently, the described embodiments are merely a part of but not all embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without creative effort are within the scope of the present application, which is defined in the appended claims.

An embodiment of the present application provides a substation frame <NUM>. As shown in <FIG> and <FIG>, the substation frame <NUM> includes a supporting assembly <NUM> and a beam assembly <NUM>. At least two supporting assemblies <NUM> are arranged at intervals along a first direction. The beam assembly <NUM> is provided between two adjacent supporting assemblies <NUM>, and the supporting assembly <NUM> supports the beam assembly <NUM>. The beam assembly <NUM> is used for attaching conducting wires. All the supporting assemblies <NUM> include a first supporting part <NUM> and a second supporting part <NUM> connected to each other. The first supporting part <NUM> is located between the beam assembly <NUM> and the second supporting part <NUM>. The first supporting part <NUM> is made of composite insulating material, and the second supporting part <NUM> is made of metal material. Since the first supporting part <NUM> connected to the beam assembly <NUM> is made of composite insulating material, the first supporting part <NUM> has excellent electrical insulation performance, thereby reducing an electrical safe distance between conducting wires and the supporting assembly <NUM>, and in turn effectively reducing a width of the substation frame <NUM> and a cost of land acquisition. Further, the second supporting part <NUM> is made of metal material, thereby achieving an effect of reducing the cost. In addition, the supporting assembly <NUM> of the above-described composite structure is light in weight, not susceptible to rusting and cracking, and accordingly, which solves the problem of difficulty in transportation, installation and maintenance, and reduces the cost of transportation, installation and maintenance.

In order to further reduce the width of the substation frame <NUM>, as shown in <FIG>, all the support assemblies <NUM> include the first supporting part <NUM> and the second supporting part <NUM>. The first supporting part <NUM> is made of composite insulating material, so as to fully develop its electrical insulation performance, thereby minimizing the electrical safe distance between the conducting wires and the supporting assembly <NUM>, thereby reducing the width of the substation frame and the cost of land acquisition.

Since in the conventional substation frame, the beam assembly is made of metal material, and a combination of a tension insulator string, a suspension insulator string, or a jumper wire is required to attach the conducting wires, the overall height of the substation frame is high. In an embodiment, as shown in <FIG>, the beam assembly <NUM> is made of composite insulating material, and thus has excellent electrical insulating performance and can be used to attach the conducting wires directly without using a structure such as a suspension insulator. Since the conducting wire has a constant height relative to the ground, after eliminating the use of the suspension insulator to attach the wires, a height of the entire substation frame <NUM> can be reduced, and an amount of material used for the suspension insulator and the supporting assembly <NUM> can be reduced. Further, since the tension insulator string, the suspension insulator string, and the jumper wire are saved, it is possible to eliminate a problem of windage yaw discharge in the substation frame <NUM>. The substation frame <NUM> made of the composite insulating material has advantages of light in weight, not susceptible to rusting and cracking, high efficiency in transportation and installation, no maintenance in the whole life cycle, and reduced operation and maintenance cost compared to the original ceramic insulator string. In an embodiment, as shown in <FIG>, two supporting assemblies <NUM> are arranged at intervals along the first direction. In this case, the substation frame <NUM> is a single-span substation frame <NUM>.

In yet another embodiment, as shown in <FIG>, at least three, for example three, four or more, supporting assemblies <NUM> are arranged at intervals along the first direction. In this case, the substation frame <NUM> is a combined substation frame <NUM>.

It should be noted that the beam assembly <NUM> and the first supporting part <NUM> may employ a post insulator structure including an insulating body located therein and a rubber shed covering an outside of the insulating body. Specifically, the insulating body may be an insulating tube or an insulating core rod. The insulating tube may be a glass steel tube formed by winding and curing glass fiber or aramid fiber impregnated with epoxy resin or a hollow pultruded tube by pultrusion. The insulating core rod may be a solid core rod formed by winding and curing glass fiber or aramid fiber impregnated with epoxy resin or a pultruded core rod formed by pultrusion. The rubber shed may be made of high-temperature vulcanized silicone rubber, or may be made of other forms of rubber material. The insulating body is provided with flanges at both ends. The flanges at both ends of the beam assembly <NUM> are fixedly connected to two flange assemblies <NUM> (as described below) at both ends of the substation frame <NUM>, respectively. The flanges at both ends of the first supporting part <NUM> are respectively fixedly connected to the flange assembly <NUM> and the second supporting part <NUM>, which may be connected by other connecting members, or may be fixed by welding, or may be connected in a combination thereof. In other embodiments, the beam assembly and the first supporting part may also be made of other composite insulating materials, which are not limited herein.

In an embodiment, as shown in <FIG>, the beam assembly <NUM> is gradually raised upward in a direction away from the supporting assemblies <NUM> on both sides to form an arched beam assembly <NUM>, so that the substation frame <NUM> can counteract vertical sag with its own arched structure, thus reducing safety hazards. As shown in <FIG> and <FIG>, a flange assembly <NUM> is provided between the supporting assembly <NUM> and the beam assembly <NUM>. An end of the supporting assembly <NUM> and an end of the beam assembly <NUM> are respectively connected to the flange assembly <NUM>. The flange assembly <NUM> includes a cylindrical body <NUM> having an axis inclined upwardly and forming an acute angle with the horizontal plane, thereby ensuring that the cylindrical body <NUM> can have a tendency to pre-arch upward after being mounted. When the flange assembly <NUM> is connected to the beam assembly <NUM>, a linkage pre-arch angle can be generated so that the beam assembly <NUM> can be gradually raised upward in the direction away from the supporting assemblies <NUM> on both sides to form the arched beam assembly <NUM>.

As shown in <FIG> and <FIG>, the substation frame <NUM> further includes a first attachment plate <NUM> disposed at a connection position between the beam assembly <NUM> and the flange assembly <NUM>. The first attachment plate <NUM> is provided with a plurality of wire attaching holes <NUM> for attaching conducting wires. That is, a wire attaching point is formed at the first attachment plate <NUM>.

Specifically, as shown in <FIG> and <FIG>, an end of the flange assembly <NUM> is provided with a first flange <NUM>. An end of the beam assembly <NUM> is provided with a second flange <NUM>. The first flange <NUM> and the second flange <NUM> are connected by a first fastener (not shown in the figures), and the first attachment plate <NUM> is sandwiched between the first flange <NUM> and the second flange <NUM>. The first attachment plate <NUM> is provided with two wire attaching holes <NUM> and one reserved hole (not shown in the figures). The reserved hole is located directly below the beam assembly <NUM>, and the two wire attaching holes <NUM> are symmetrically arranged on both sides of the reserved hole.

In an embodiment, as shown in <FIG> and <FIG>, the beam assembly <NUM> includes at least two beam segments <NUM>, such as two, three, or more beam segments <NUM>. Two adjacent beam segments <NUM> are connected by flanges. The substation frame <NUM> includes a second attachment plate <NUM> disposed at the flanges between two adjacent beam segments <NUM>. The second attachment plate <NUM> is provided with a plurality of wire attaching holes <NUM> for attaching conducting wires <NUM>. That is, a wire attaching point is formed at the second attachment plate <NUM>.

Specifically, as shown in <FIG> and <FIG>, the beam assembly <NUM> includes two beam segments <NUM>. Adjacent ends of the two beam segments <NUM> are respectively connected to a third flange <NUM>. A second attachment plate <NUM> is sandwiched between two third flanges <NUM>. The second attachment plate <NUM> is provided with two wire attaching holes <NUM> and one reserved hole. The reserved hole is located directly below the beam assembly <NUM>, and the two wire attaching holes <NUM> are symmetrically arranged on both sides of the preformed hole. In <FIG>, the substation frame <NUM> is a single-span substation frame <NUM>. The single-span substation frame <NUM> is provided with two supporting assemblies <NUM> arranged at intervals along the first direction. Both ends of the beam assembly <NUM> are respectively connected to top ends of the two supporting assemblies <NUM> by the flange assembly <NUM>. The single-span substation frame <NUM> is provided with two first attachment plates <NUM> at both ends, and one second attachment plate <NUM> is provided in the middle of the beam assembly <NUM>, thus forming three wire attaching points, which are used for attaching three-phase wires A, B and C, respectively.

In yet another embodiment, the beam assembly <NUM> may not be provided in segments, i.e., the entire beam assembly <NUM> is a strip-shaped composite post insulator. The strip-shaped composite post insulator includes an insulating body located therein and a rubber shed covering an outside of the insulating body. The insulating body and the rubber shed are identical to those described above and not repeated herein. As shown in <FIG>, the substation frame <NUM> includes a plurality of hoops <NUM> and a third attachment plate <NUM>. The hoops <NUM> are sleeved on the beam assembly <NUM> at intervals. The third attachment plate <NUM> is arranged on the outer wall of the hoop <NUM>. The third attachment plate <NUM> is provided with a plurality of wire attaching holes <NUM> for attaching conducting wires. That is, wire attaching points are formed at the third attachment plate <NUM>. The hoop <NUM> can be glued and fixed to the beam assembly <NUM>. Specifically, the hoop <NUM> is first glued and fixed to the insulating body, then the rubber shed is coated as a whole, and the rubber shed is coated on both ends of the hoop <NUM>, so that the hoop <NUM> is in a sealed connection with the rubber shed. An inner wall of the hoop <NUM> is provided with a plurality of first slots <NUM> arranged at intervals and a plurality of second slots <NUM> arranged at intervals. The plurality of first slots <NUM> are disposed around the outer wall of the beam assembly <NUM>, and the plurality of second slots <NUM> and the first slots <NUM> are alternatively arranged, so that the first slots <NUM> and the second slots <NUM> can cooperate to limit an axial sliding and a radial rotation of the hoop <NUM> on the beam assembly <NUM>, so as to maintain the stability of the connection between the hoop <NUM> and the beam assembly <NUM>. Further, the first slots <NUM> and the second slots <NUM> are alternatively arranged, such that when the glue material is filled, the glue material can flow sufficiently and uniformly in the first slots <NUM> and the second slots <NUM>, which facilitates glue connection between the hoop <NUM> and the insulating body, and improves the bonding strength.

Specifically, as shown in <FIG>, the third attachment plate <NUM> is integrally formed with the hoop <NUM>. The first slots <NUM> and the second slots <NUM> on the inner wall of the hoop <NUM> are vertically arranged. The third attachment plate <NUM> is provided with two wire attaching holes <NUM> and one reserved hole. The reserved hole is located directly below the beam assembly <NUM>, and the two wire attaching holes <NUM> are symmetrically arranged on both sides of the reserved hole.

Of course, in other embodiments, a plurality of beam segments <NUM> can be spliced and combined with the hoop <NUM>. For example, the beam assembly <NUM> includes a long beam segment <NUM> and a short beam segment <NUM>. The long beam segment <NUM> and the short beam segment <NUM> are connected by the flanges. The second attachment plate <NUM> is provided at the flanges. The hoop <NUM> is sleeved on the long beam segment <NUM>. The specific implementation is selected according to the actual situation, and which is not limited herein.

In another embodiment, as shown in <FIG> and <FIG>, the beam assembly <NUM> of the substation frame <NUM> includes an intermediate segment <NUM> and edge segments <NUM> disposed at both ends of the intermediate segment <NUM>. The edge segments <NUM> are made of composite insulating material, and the intermediate segment <NUM> is made of metal material. The edge segment <NUM> is made of composite insulating material, and thus has excellent electrical insulating performance and can be used to directly attach the conducting wires, thereby reducing the structures such as the suspension insulators and the like to a certain extent. Further, since the tension insulator string, the suspension insulator string, and the jumper wire are saved, it is possible to eliminate a problem of windage yaw discharge in the edge wires. The edge segment <NUM> made of composite insulating material has advantages of light in weight, not susceptible to rusting and cracking, high efficiency in transportation and installation, no maintenance in the whole life cycle, and reduced operation and maintenance cost compared to the original ceramic insulator string. Further, the intermediate segment <NUM> is made of metal material, so that the material cost can be reduced.

The structure and material of the edge segment <NUM> are similar to those of the beam assembly <NUM> made of composite insulating material described above and which are not repeated herein. With the beam assembly <NUM> of this structure, on the one hand, the edge segment <NUM> made of composite insulating material has advantages of light in weight, not susceptible to rusting and cracking, high efficiency in transportation and installation, no maintenance in the whole life cycle, and reduced operation and maintenance cost compared to the original ceramic insulator string. On the other hand, the intermediate segment <NUM> is made of metal material, so that the material cost can be reduced.

It should be noted that since the intermediate segment <NUM> is made of metal material, the intermediate segment <NUM> still needs to attach the conducting wire via the suspension insulator.

In one embodiment, as shown in <FIG>, the intermediate segment <NUM> may include at least two metal tubes <NUM>. Two adjacent metal tubes <NUM> are connected by flanges. Specifically, the intermediate segment <NUM> may include two, three, or more metal tubes <NUM>. Further, in other embodiments, the intermediate segment <NUM> may also include only one metal tube.

In another embodiment, as shown in <FIG>, the intermediate segment <NUM> may also be a metal lattice post. Of course, in other embodiments, the intermediate segment <NUM> may also be other structures made of other metal materials, and which is not limited herein.

Similarly, as shown in <FIG>, the edge segment <NUM> may be a beam segment, or as shown in <FIG>, the edge segment <NUM> may be formed by splicing at least two beam segments <NUM>. The two beam segments <NUM> are respectively provided with one third flange <NUM> at their adjacent ends. The two third flanges <NUM> are connected by fasteners. One second attachment plate <NUM> can further be sandwiched between the two third flanges <NUM>. The second attachment plate <NUM> is provided with two wire attaching holes <NUM> and one preformed hole. The preformed hole is located directly below the beam assembly <NUM>, and the two wire attaching holes <NUM> are symmetrically arranged on both sides of the preformed hole for attaching the conducting wires <NUM>. That is, the wire attaching point is formed at the second attachment plate <NUM>.

Alternatively, when the edge segment <NUM> is long, the wire attaching point may be disposed on the edge segment <NUM>. In this case, the edge segment <NUM> may be a strip-shaped composite post insulator. The strip-shaped composite post insulator is identical to that as described above, and which will not be repeated herein. As shown in <FIG>, the edge segment <NUM> also includes the plurality of hoops <NUM> and the third attachment plate <NUM>. The plurality of hoops <NUM> are sleeved on the edge segment <NUM> at intervals. The third attachment plate <NUM> is arranged on the outer wall of the hoops <NUM>. The third attachment plate <NUM> is provided with the plurality of wire attaching hole <NUM> for attaching conducting wires. That is, the wire attaching point is formed at the third attachment plate <NUM>. The hoop <NUM> can be glued and fixed to the edge segment <NUM>. The specific gluing structure and gluing method are the same as those described above, and details thereof are not repeated herein. Of course, in other implementations, the edge segment <NUM> may also be formed by splicing the plurality of beam segments <NUM> and combining them with the hoop <NUM>.

Further referring to <FIG>, the wire attaching holes <NUM> of each of the attachment plates are connected to an attachment fitting <NUM>. The conducting wire is connected to the attachment fitting <NUM> so that the wire attaching holes <NUM> can attach the conducting wire. The wire attaching hole <NUM> in the attachment plate for attaching the attachment fitting <NUM> is generally circular-shaped, but considering that the attachment fitting <NUM> may rotate by an angle under an action of an external force, thus, after the attachment fitting <NUM> is rotated, a direction of a force between the attachment fitting <NUM> and each attachment plate does not intersect a center line of each attachment plate. That is, a torque force is generated on each attachment plate, and this force causes the connection to become loose and even reduces the supporting life. In order to keep the direction of the force between the attachment fitting <NUM> and each attachment plate intersecting the center line of each attachment plate after the attachment fitting <NUM> is rotated, in the present application, at least one wire attaching hole <NUM> in each attachment plate is provided as a waist-shaped hole or an arc-shaped hole. The attachment fitting <NUM> automatically moves in the wire attaching hole <NUM> after the attachment fitting <NUM> is rotated, so that the direction of the force exerted by the attachment fitting <NUM> on each attachment plate intersects the center line of each attachment plate, thereby maintaining the stability of the connection of each attachment plate, enhancing the stability of the substation frame <NUM>, and prolonging the service life thereof. In order to ensure the mechanical stability of the substation frame <NUM>, the center line of each attachment plate coincides with the center line of the beam assembly <NUM>, so that the wire attaching hole <NUM> is provided as the waist-shaped hole or an arc-shaped hole to ensure that the direction of the force exerted by the attachment fitting <NUM> on the beam assembly <NUM> remains intersecting the center line of the beam assembly <NUM>.

The flange assembly <NUM> disposed between the supporting assembly <NUM> and the beam assembly <NUM> is prone to abnormal discharge in the vicinity of a strong electric field due to a large number of irregular contours and a relatively short distance from the first attachment plate <NUM>. As shown in <FIG>, the substation frame <NUM> further includes a shielding case <NUM>. The shielding case <NUM> is disposed outside the flange assembly <NUM> to prevent abnormal discharge.

In addition, as shown in <FIG>, a grading ring <NUM> is disposed on the beam assembly <NUM> on a side of the first attachment plate <NUM> away from the flange assembly <NUM>. The grading ring <NUM> can evenly distribute the high voltage around to ensure that there is no potential difference between various parts of the ring, thereby achieving the effect of equalizing the voltage and preventing abnormal discharge from occurring.

Further, as shown in <FIG>, the grading ring <NUM> is further provided on at least one side of the second attachment plate <NUM>, so as to uniform the electric field and prevent discharge from occurring. Preferably, the grading rings <NUM> are disposed on both sides of the second attachment plate <NUM>.

Similarly, the grading ring (not shown in the figures) is further disposed on at least one side of the third attachment plate <NUM>, so as to uniform an electric field and prevent discharge from occurring. Preferably, the grading rings are disposed on both sides of the third attachment plate <NUM>.

In an embodiment, as shown in <FIG> and <FIG>, each supporting assembly <NUM> includes two main supporting posts <NUM>. Each main supporting post <NUM> includes the first supporting part <NUM> and the second supporting part <NUM>. The first supporting part <NUM> is made of composite insulating material. The two main supporting posts <NUM> are respectively connected to the flange assembly <NUM>. The plane in which the axes of the two main supporting posts <NUM> are located is perpendicular to the first direction, and an angle of <NUM>°-<NUM>° is formed between the two main supporting posts <NUM>.

Further, as shown in <FIG>, in the two supporting assemblies <NUM> located on both sides, at least one of the supporting assemblies <NUM> further includes an oblique supporting post <NUM>. The oblique supporting post <NUM> is connected to the flange assembly <NUM>, and includes the first supporting part <NUM> and the second supporting part <NUM>. The first supporting part <NUM> is made of composite insulating material. The oblique supporting post <NUM> is located outside the plane where the two main supporting posts <NUM> are located, so as to limit an offset of the substation frame <NUM> in the first direction. It should be noted that the oblique supporting post <NUM> is provided on a side away from the beam assembly <NUM>.

The substation frame <NUM> needs to be grounded, especially in the case of the combined substation frame <NUM>. When the beam assembly <NUM> is made of composite insulating material and can be directly used to attach the conducting wire, since the ground wire must maintain a sufficient electrical safety distance between the ground wire and the conducting wire, and a lightning protection problem must be taken into account, thus how to attach the ground wire is particularly important. As shown in <FIG>, in an embodiment, the substation frame <NUM> further includes wiring posts <NUM> disposed opposite to the supporting assembly <NUM>. The wiring post <NUM> is made of composite insulating material, and includes a first end <NUM> disposed on the supporting assembly <NUM> and a second end <NUM> disposed opposite to the first end <NUM>. The second end <NUM> has a height higher than a height of the beam assembly <NUM>. The second end <NUM> of the wiring post <NUM> is used for attaching the ground wire. The second ends <NUM> of the wiring posts <NUM> are electrically connected to each other. By providing the wiring posts <NUM>, and since the second end <NUM> of the wiring post <NUM> has a height higher than the height of the beam assembly <NUM>, the second end <NUM> of the wiring post <NUM> has a height higher than the height of the wire attaching on the beam assembly <NUM>. As such, the electrical safe distance between the ground wire and the wire can be ensured, and the lightning protection function can be achieved. Since both the wiring post <NUM> and the first supporting part <NUM> are made of insulating material, the grounding wire needs to be connected to a down lead <NUM> to complete the grounding. Since a mounting process during which the down lead <NUM> is attached to the wiring post <NUM> is relatively complicated, after all the second ends <NUM> of the wiring posts <NUM> are electrically connected, only the down lead <NUM> needs to be connected to the grounding point along one of the wiring posts <NUM> to realize the whole grounding of the substation frame <NUM>, and thus the mounting process is convenient. Of course, in other embodiments, the down lead <NUM> may also be connected to the ground point along several or all of the wiring posts <NUM>, and which is not limited herein. In an embodiment, the electrical connection between the second ends <NUM> of the wiring posts <NUM> may be realized by connecting the conducting wires between the second ends <NUM> of the wiring posts <NUM>.

In order to ensure a stable connection between the wiring post <NUM> and the beam assembly <NUM>, the direction of the wiring post <NUM> is along the same straight line as the axis of the supporting assembly <NUM>. That is, the wiring post <NUM> is vertically disposed on the beam assembly <NUM>, and the axial direction of the wiring post <NUM> coincides with the direction of gravity thereof. The wiring post <NUM> may be stably disposed on the supporting assembly <NUM>. Specifically, the wiring post <NUM> is disposed on the flange assembly <NUM> between the supporting assembly <NUM> and the beam assembly <NUM>. The first end <NUM> of the wiring post <NUM> and a top end of the flange assembly <NUM> may be connected by the flange, may be fixed by welding, or may be connected in a combination of the above connection methods, which is not limited herein.

When the electrical safe distance between the first end <NUM> of the wiring post and the attaching point for attaching the wire on the beam assembly <NUM> is sufficient, the down lead <NUM> may be disposed to be attached to the wiring post <NUM>.

In an embodiment, when the substation frame <NUM> is the combined substation frame <NUM>, three or a multiple of three wire attaching points, such as three, six or nine, for attaching the wires are provided between two adjacent supporting assemblies <NUM> to adapt to the attaching of the three-phase wires. Three adjacent wire attaching points are respectively attached to the three-phase wires of A, B, and C, and a sufficient in-phase electrical safety distance between the three phases of A, B, and C needs to be ensured. It should be noted that, in order to ensure the electrical safe distance between adjacent wire attaching points, when the substation frame <NUM> is the combined substation frame <NUM>, no wire attaching point is provided at the connection between the flange assembly <NUM> at the middle position and the beam assemblies <NUM> on both sides, or only one side is provided with a wire attaching point.

In addition, the distance between the nearest two wire attaching points on both sides of the supporting assembly <NUM> at the middle position is required to satisfy a phase-to-phase safety electrical distance of the wires attached to the substation frame <NUM>.

It should be noted that, when the distance between the wire attached to the nearest wire attaching point of the supporting assembly <NUM> and the supporting assembly <NUM> does not satisfy the safe electrical distance between the down lead <NUM> and the wire, a supporting structure can be additionally provided to ensure the safe electrical distance between the down lead <NUM> and the wire attached to the attaching point. The distance between the down lead <NUM> and the wire can be greater than a first predetermined value.

Specifically, a connection portion of the wiring post <NUM> and the supporting assembly <NUM> is provided with a post insulator (not shown in the figures), which forms a supporting structure. The post insulator includes a proximal end disposed on the supporting assembly <NUM> and a distal end opposite to the proximal end. A distance between the distal end of the post insulator and the wire is greater than the first predetermined value. The down lead <NUM> is attached to the distal end of the post insulator from the second end <NUM> of the wiring post <NUM> and then led to ground, so as to ensure a safe electrical distance between the down lead <NUM> and the conducting wire attached to the wire attaching point.

In yet another embodiment, the longer the diameter of the beam assembly <NUM> made of composite insulating material is, the higher the mechanical strength is. The axial length thereof can be set to be longer to provide more attaching points. Further, as the diameter increases, the manufacturing cost increases rapidly, and the material cost increases accordingly. As shown in <FIG>, in order to reduce the cost of the beam assembly <NUM>, the substation frame <NUM> further includes an auxiliary support <NUM>. The auxiliary support <NUM> is disposed between two adjacent supporting assemblies <NUM> and used for supporting the beam assemblies <NUM>, so that in a case where the distance between the two supporting assemblies <NUM> is fixed, the diameter of the beam assembly <NUM> provided with the auxiliary support <NUM> may be set below a first diameter, which is smaller than the diameter of the beam assembly <NUM> when no auxiliary support <NUM> is provided, thereby reducing the cost of the beam assembly <NUM>. The overall cost of the substation frame <NUM> is reduced, reflecting the advantages of the composite insulating material.

In order to maintain the overall performance of the substation frame <NUM>, as shown in <FIG>, the auxiliary support <NUM> includes a first support <NUM> and a second support <NUM>. The first support <NUM> is located between the beam assembly <NUM> and the second support <NUM>. The first support <NUM> is made of composite insulating material, and the second support <NUM> is made of metal material.

It should be noted that the first support member <NUM> may adopt a post insulator structure similar to the beam assembly <NUM> and the first supporting part <NUM>, or may be made of other composite insulating materials, and the details thereof are not repeated herein.

In one embodiment, as shown in <FIG>, there are three wire attaching points for attaching the wires between the auxiliary support <NUM> and the supporting assembly <NUM> adjacent to a first side thereof, and there is no attached wire between the auxiliary support <NUM> and the supporting assembly <NUM> adjacent to a second side thereof. The second side is opposite to the first side.

In summary, by setting the first supporting part <NUM> of the support assembly <NUM> connected to the beam assembly <NUM> to be made of composite insulating material, the first supporting part <NUM> has excellent electrical insulation performance, thereby reducing the electrical safe distance between the conducting wires and the supporting assembly <NUM>, and in turn effectively reducing the width of the substation frame <NUM> and the cost of land acquisition. Further, the second supporting part <NUM> is made of metal material, thereby achieving an effect of reducing the cost. In addition, the supporting assembly <NUM> of the above-described composite structure is light in weight, not susceptible to rusting and cracking, and accordingly, which solves the problem of difficulty in transportation, installation and maintenance, and reduces the cost of transportation and installation.

Further, the beam assembly <NUM> is made of composite insulating material, and thus has excellent mechanical performance and electrical insulating performance and can be used to directly attach the conducting wire without using a structure such as a suspension insulator. Since the wire has a constant height relative to the ground, after eliminating the use of the suspension insulator, a height of the entire substation frame <NUM> can be reduced , and an amount of material used for the suspension insulator and the supporting assembly <NUM> can be reduced. Further, since the tension insulator string, the suspension insulator string, and the jumper wire are eliminated, it is possible to eliminate the problem of windage yaw discharge in the substation frame <NUM>. The substation frame <NUM> made of composite insulating material has advantages of light in weight, not susceptible to rusting and cracking, low cost and high efficiency in transportation and installation, no maintenance in the whole life cycle, and reduced operation and maintenance cost of the original ceramic insulator string.

Claim 1:
A substation frame (<NUM>, <NUM>), comprising:
at least two supporting assemblies (<NUM>) arranged at intervals along a first direction,
wherein all the supporting assemblies (<NUM>) comprise a first supporting part (<NUM>) and a second supporting part (<NUM>) that are connected to each other; and
a beam assembly (<NUM>, <NUM>) provided between two adjacent supporting assemblies (<NUM>) and comprising two ends, and flange assemblies (<NUM>) provided between the supporting assemblies (<NUM>) and the ends of the beam assembly (<NUM>, <NUM>), wherein an end of the supporting assemblies (<NUM>) and an end of the beam assembly (<NUM>, <NUM>) are respectively connected to the flange assemblies (<NUM>);
wherein the first supporting part (<NUM>) is located between the beam assembly (<NUM>, <NUM>) and the second supporting part (<NUM>),
wherein the first supporting part (<NUM>) is made of composite insulating material and wherein
the beam assembly (<NUM>) either;
(i) is made of composite insulating material, or
(ii) comprises an intermediate segment (<NUM>) and edge segments (<NUM>) disposed at both ends of the intermediate segment (<NUM>), wherein the edge segments (<NUM>) are made of composite insulating material, and the intermediate segment (<NUM>) is made of metal material;
characterized in that:
the second supporting part (<NUM>) is made of metal material;
the substation frame (<NUM>, <NUM>) further comprises a first attachment plate (<NUM>) provided at a connection position between the beam assembly (<NUM>, <NUM>) and the flange assemblies (<NUM>), wherein the first attachment plate (<NUM>) is provided with a first wire attaching hole (<NUM>) for attaching a conducting wire.