Test base fault simulation area power distribution device arrangement structure

Abstract

The invention discloses a test base fault simulation area power distribution device arrangement structure, which comprises a plurality of tubular buses, and the tubular buses are supported by a mother tube support to a height of 2-3 m from the ground. Two ends of each tubular bus are respectively provided with a first T-connection fitting, a second T-connection fitting and cable supports respectively corresponding to the first T-connection fitting and the second T-connection fitting, and the cable supports are used for supporting cables at two ends of a fault setting point to be respectively connected to the first T-connection fitting and the second T-connection fitting, so that the tubular buses are serially connected to the fault setting point; the tubular bus is provided with a third T-joint fitting between the first T-joint fitting and the second T-joint fitting, and the third T-joint fitting is used for being connected with a fault simulation unit. According to the scheme, a new thought is provided for fault simulation, an original overhead insulated wire is replaced by the floor type tubular bus pipeline, and the floor type tubular bus pipeline has the advantages that operation is easy, connection is convenient, and the problem that the insulation performance of the insulated wire is damaged due to frequent puncture is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of test base fault simulation, and particularly relates to a distribution device layout structure for a test base fault simulation area. Background Art

[0002] The distribution network test base is a facility dedicated to researching, testing, and verifying the performance of distribution network technologies, equipment, and systems. As Figure 1 shown, the distribution network test base generally sets five fault setting points F1 to F5, and the fault setting points are centrally arranged in the test site for various fault simulations:

[0003] Fault point F1 simulates the faults at the end and middle points of cable lines, overhead lines, and hybrid lines;

[0004] Fault point F2 simulates the faults at the head ends of cable lines and hybrid lines;

[0005] Fault point F3 simulates the faults at the head ends of overhead lines and hybrid lines and branch line faults;

[0006] Fault point F4 simulates the outgoing line of the ring main unit to the high-voltage side of the distribution transformer or box-type substation in the substation area;

[0007] Fault point F5 simulates the faults of the connection lines powered by different substations.

[0008] In urban construction, 10 kV overhead lines usually use insulated conductors. According to the wiring schematic diagram of the fault simulation area of the test base, if each fault point is to be connected to a fault simulation unit, the conventional solution is to use cables. As Figure 2 shown, the test operator needs to climb the pole for operation. After the cable is on the pole, from the cable terminal to the overhead insulated wire, it is then connected to the insulated wire conductor through a piercing clamp. This solution has problems such as complex operation, difficult connection, and easy damage to the insulation performance of the original insulated wire due to frequent piercing because the staff needs to work at heights and use piercing clamps to pierce the insulated wire for each test. Summary of the Invention

[0009] The purpose of the present invention is to propose a distribution device layout structure for a test base fault simulation area in view of the problems existing in the prior art.

[0010] To achieve the above purpose, the present invention adopts the following technical solutions:

[0012] A distribution device layout structure for a test base fault simulation area includes a plurality of tubular busbars, and the tubular busbars are supported by busbar brackets to a height of 2 m to 3 m from the ground;

[0013] Both ends of each tubular busbar are respectively provided with a first T-connection fitting and a second T-connection fitting, as well as cable supports corresponding to the first T-connection fitting and the second T-connection fitting respectively. The cable supports are used to support the two ends of the cables at the fault setting point to be respectively connected to the first T-connection fitting and the second T-connection fitting, so that the tubular busbar is connected in series to the fault setting point;

[0014] There is a third T-connection fitting between the first T-connection fitting and the second T-connection fitting on the tubular busbar, which is used to connect the fault simulation unit.

[0015] In the above-mentioned distribution device layout structure in the fault simulation area of the test base, each fault setting point has three phases A, B, and C, and each phase corresponds to a tubular busbar;

[0016] The two ends of the cables of the three phases A, B, and C of the fault setting point are respectively connected to the first T-connection fitting and the second T-connection fitting of the corresponding tubular busbar through the cable supports.

[0017] In the above-mentioned distribution device layout structure in the fault simulation area of the test base, this structure is used to configure multiple fault setting points. Each fault setting point has three phases ABC, and each phase of each fault setting point corresponds to a tubular busbar.

[0018] In the above-mentioned distribution device layout structure in the fault simulation area of the test base, the main pipe support includes at least two mutually parallel support channel steels;

[0019] Each support channel steel is fixedly supported by at least two support steel pipes arranged along the axial direction of the support channel steel;

[0020] Each tubular busbar is erected on the at least two mutually parallel support channel steels through post insulators, and multiple tubular busbars are arranged at intervals along the axial direction of the support channel steel;

[0021] The support steel pipes are connected to the main grounding grid through grounding flat steel.

[0022] In the above-mentioned distribution device layout structure in the fault simulation area of the test base, the tubular busbar is fixed to the corresponding post insulator through a tubular busbar fixing fitting;

[0023] There are fixing steel plates on the support channel steel, and the post insulator fixes the corresponding tubular busbar to the corresponding support channel steel by being fixed to the fixing steel plates.

[0024] In the above-mentioned distribution device layout structure in the fault simulation area of the test base, the tubular busbar is fixed to the corresponding post insulator through the tubular busbar fixing fitting that can slide relative to the tubular busbar at least at one place, and is fixed to the corresponding post insulator through the tubular busbar fixing fitting that cannot slide relative to the tubular busbar at least at one place;

[0025] The distance between adjacent busbars is 400 mm to 500 mm.

[0026] In the distribution device layout structure of the fault simulation area in the above test base, the cable support includes a first support and a second support. The first support corresponds to the first T-connection fitting, and the second support corresponds to the second T-connection fitting. The first support and the second support are respectively located on both sides of the main pipe support.

[0027] The first support / second support includes at least two longitudinally extending channel steels that are fixedly arranged on the side of the support steel pipe and are spaced apart vertically along the extending direction of the support channel steel.

[0028] On the side of the longitudinally extending channel steel away from the support steel pipe, there are several cable clamps.

[0029] The three-phase cables at the fault setting point are fixed to at least one corresponding longitudinally extending channel steel through at least one cable clamp.

[0030] Each single-phase cable at the fault setting point is respectively fixed to at least one corresponding longitudinally extending channel steel through at least one cable clamp.

[0031] And the longitudinally extending channel steel corresponding to the single-phase cable is located above the longitudinally extending channel steel corresponding to the three-phase cable.

[0032] The three-phase cables (or their extension lines) at the fault setting point are fixed to at least one relatively lower longitudinally extending channel steel through at least one cable clamp for the three-phase cables to climb upward. Subsequently, at a position close to the tubular busbar, they are separated into single-phase cables. Each single-phase cable is fixed to at least one relatively upper longitudinally extending channel steel through at least one cable clamp respectively, and continues to climb upward to the corresponding tubular busbar, and is connected to the tubular busbar through the first T-connection fitting / second T-connection fitting of the corresponding tubular busbar.

[0033] The upper and lower here are relative. The first support / second support can have two or more longitudinally extending channel steels. When there are two, the upper longitudinally extending channel steel and the lower longitudinally extending channel steel are very clear. However, when there are three or more, at least the uppermost longitudinally extending channel steel is used to fix the single-phase cable, and at least the lowermost longitudinally extending channel steel is used to fix the three-phase cable. For the middle longitudinally extending channel steel, if it is used to fix the three-phase cable, it is considered to be relatively lower, and if it is used to fix the single-phase cable, it is considered to be relatively upper.

[0034] In the distribution device layout structure of the fault simulation area in the above test base, the fault setting point is located at the overhead line, and each fault setting point is divided. The two divided endpoints are respectively connected to the first T-connection fitting and the second T-connection fitting of the corresponding tubular busbar through cable extension lines and cable supports, so that the tubular busbar is connected in series to the fault setting point.

[0035] Two endpoints of the fault point are permanently lapped with corresponding cable extension lines respectively.

[0036] It should be noted that since each fault point is a three-phase line, the two endpoints of the fault point mentioned here are regarded as a unified whole for the three phases. If the three phases are distinguished, there should be six endpoints.

[0037] The cable extension lines are used to lead the fault point to this power distribution device. The three phases at both ends of the cable extension lines are separated, and the three phases in the middle overlap. The three phases at one end of the cable extension lines are respectively connected to the three single-phase cables at the fault setting point, and the three phases at the other end are respectively connected to the corresponding tubular busbars. The middle part serves as the three-phase cables at the corresponding fault setting point, and is fixed to at least one longitudinally continuous channel steel located relatively below through at least one cable clamp for the three-phase cables to climb upward. Then, when approaching the position of the tubular busbar, the three phases are separated and serve as the three single-phase cables at the corresponding fault setting point. Each single-phase cable is fixed to at least one longitudinally continuous channel steel located relatively above through at least one cable clamp and continues to climb upward to the corresponding tubular busbar respectively.

[0038] In the layout structure of the power distribution device in the fault simulation area of the above test base, the post insulators are 10kV post insulators or 20kV post insulators;

[0039] The post insulators adopt TR205 with a bending resistance of 8kN and a torsional resistance of 4kN;

[0040] The tubular busbar adopts

[0041] In the layout structure of the power distribution device in the fault simulation area of the above test base, the support steel pipes are arranged in two rows and N columns, and the distance between the two rows of support steel pipes is 2000±200mm, and m represents the number of fault setting points.

[0042] In the layout structure of the power distribution device in the fault simulation area of the above test base, the tubular busbar is supported by a busbar support to a height of 2.6m from the ground.

[0043] The advantages of the present invention are as follows:

[0044] This solution provides a new idea, that is, adopting the layout type of the power distribution device in the fault simulation area of the test base to solve the original way of using a puncture line clamp after climbing the power pole and then connecting the cable terminal to the fault test area. Replacing the original overhead insulated wire with a floor-mounted tubular busbar pipeline can greatly reduce the operation and maintenance test workload, reduce the damage of the puncture line clamp to the insulation performance, greatly improve the power supply reliability, and achieve good economic and social benefits;

[0045] The layout structure provided by this solution is simple and ingenious. Multiple fault points can be set according to requirements. Compared with the conventional test solution of the fault cable to the overhead insulated cable method, the workload of piercing the overhead cable to the conductor is reduced. It has the advantages of convenient operation and simple maintenance. Moreover, due to its simple structure and ingenious layout, the floor area is also very small.

[0046] Through the device structure provided by this solution, the quick connection between the fault setting point and the fault simulation unit can be realized, with simple operation and convenient connection. At the same time, since it is a permanent lap joint and only needs to be pierced once, problems such as the insulation performance of the insulated wire being damaged due to frequent piercing will not occur. Brief Description of the Drawings

[0047] Figure 1 The figure shows the wiring schematic diagram of the cable from the fault simulation area of the test base to the fault simulation unit;

[0048] Figure 2 The figure shows the operation schematic diagram of connecting the cable to the fault simulation unit in the prior art;

[0049] Figure 3 It is the plane section of the layout form of the distribution device in the fault simulation area of the test base Figure 1 ;

[0050] Figure 4 It is the plane section of the layout form of the distribution device in the fault simulation area of the test base Figure 2 ;

[0051] Figure 5 It is the plane section of the layout form of the distribution device in the fault simulation area of the test base Figure 3 ;

[0052] Figure 6 It is the connection schematic diagram between the fault simulation unit and the fault setting point;

[0053] Figure 7 The figure shows the operation schematic diagram of connecting the cable to the fault simulation unit through the distribution device of the present invention.

[0054] Reference Signs: tubular busbar 1; first tapping fitting 11; second tapping fitting 12; third tapping fitting 13; tubular busbar fixing fitting 14; tubular busbar terminal ball 15; busbar support 2; support channel steel 21; support steel pipe 22; post insulator 23; earthing flat steel 24; fixing steel plate 25; connecting bolt 26; cable support 3; continuous channel steel 31; cable hoop 32; fault simulation unit 4; three-phase cable 5; single-phase cable 51; cable extension 6; test cable 7. Detailed Embodiments

[0055] This solution provides a layout structure of a distribution device in the fault simulation area of a test base. The pipe busbar distribution device layout type is adopted in the fault simulation area of the test base. The fault setting points to be simulated are disconnected, and are connected to the distribution device in this fault simulation area through cable extension lines. The height can be controlled within 2.6 m. Multiple fault points can be set as needed, and each fault setting point has three phases: A, B, and C. For example, Figures 3 to 5 , the specific structure is as follows:

[0056] It includes several tubular busbars 1, with one corresponding to each phase. When there are multiple fault setting points, each phase of each fault setting point corresponds to one tubular busbar 1. In this embodiment, taking 5 fault setting points as an example, there are a total of 15 tubular busbars 1.

[0057] Each tubular busbar 1 is supported by a busbar support 2 to a height of 2.6 m from the ground. Of course, this is only the design of this embodiment. When in use, it can also be supported to heights such as 2.4 m or 2.8 m from the ground.

[0058] Both ends of each tubular busbar 1 are respectively provided with a first T-connection fitting 11 and a second T-connection fitting 12, and cable supports 3 corresponding to the first T-connection fitting 11 and the second T-connection fitting 12 respectively.

[0059] The cable support 3 is used to support the cables at both ends of the fault setting point to be respectively connected to the first T-connection fitting 11 and the second T-connection fitting 12, so that the tubular busbar 1 is connected in series to the fault setting point. Specifically, the cables at both ends of the A phase, B phase, and C phase of each fault setting point are respectively connected to the first T-connection fitting 11 and the second T-connection fitting 12 of the corresponding tubular busbar 1 through the cable support 3. That is, the cables at both ends of each phase of the fault setting point are respectively connected to the first T-connection fitting 11 and the second T-connection fitting 12 of the corresponding tubular busbar 1, so that the tubular busbar 1 is connected in series to the three phases of the fault setting point. When in use, the wires of the fault setting point are disconnected. Since it is three-phase, all three phases are disconnected. The two ends of each phase are respectively connected to the first T-connection fitting 11 and the second T-connection fitting 12 at both ends of the corresponding tubular busbar 1, or the two disconnected ends of the fault setting point are respectively connected to the first T-connection fitting 11 and the second T-connection fitting 12 at both ends of the corresponding tubular busbar 1 through wire cables, and are assembled through the cable support 3 during the process.

[0060] In addition, a third T-connection fitting 13 is provided between the first T-connection fitting 11 and the second T-connection fitting 12 of the tubular busbar 1 for connecting the fault simulation unit 4 to conduct fault simulation.

[0061] In this embodiment, two sets of fault simulation units 4 are provided, and a phase selection switch is configured. The upper part of the phase selection switch is respectively connected to the fault setting point through cables, specifically connected to the third tapping fitting 13 of the corresponding tubular busbar 1; the lower part is grounded through a grounding resistor and a grounding switch. For a certain fault setting point, the phase selection switch can be synchronously closed for three phases, or can be closed separately for single-phase or two-phase to simulate various faults such as three-phase short circuit, single-phase grounding, and inter-phase short circuit. The connection mode between the fault simulation unit 4 and the fault setting point is as Figure 6 shown, and the grounding resistor is set to be switchable in five gears of 50, 100, 200, 500, 1000, 3000, and 10000 ohms. A PT / CT integrated measurement cabinet is installed at the fault simulation unit 4, and the signal is connected to the fault recorder.

[0062] Specifically, the main pipe support 2 includes at least two mutually parallel support channel steels 21, as Figure 4 shown. In this embodiment, two support channel steels 21 are taken as an example. Each support channel steel 21 is fixedly supported by at least two support steel pipes 22 arranged along the axial direction of the support channel steel 21, that is, the support steel pipes 22 are arranged in two rows and N columns. The distance between the two rows of support steel pipes 22, or the distance between the two support channel steels 21, is 2000 ± 200 mm. In this embodiment, 2000 mm is preferably selected to facilitate the test for fixing the cable connection. When in use, three or more mutually parallel support channel steels 21 can also be used.

[0063] The support steel pipes 22 are connected to the main grounding grid through grounding flat steel 24 and bolts 26. Both ends of the tubular busbar 1 are blocked by tubular busbar terminal balls 15.

[0064] Each tubular busbar 1 is erected on two mutually parallel support channel steels 21 through post insulators 23, fixing steel plates 25, and bolts 26. The tubular busbar 1 is perpendicular to the support channel steel 21. Multiple tubular busbars 1 are arranged at intervals along the axial direction of the support channel steel 21, and the distance between adjacent tubular busbars 1 is 400 mm to 500 mm, preferably 450 mm, which can meet various working conditions in normal and test situations.

[0065] In the above N columns, represents rounding up, m represents the number of fault setting points. In this embodiment, 5 fault setting points are taken as an example, so N = 3. Each support channel steel 21 is supported by three support steel pipes 22. The several support steel pipes 22 supporting the same support channel steel 21 are preferably arranged at approximately equal intervals. According to the above formula, for the application scenario of 6 fault setting points, each support channel steel 21 is supported by four support steel pipes 22. The requirements for other scenarios are similar and will not be elaborated here.

[0066] The length of the support steel channel 21 is related to the distance between the tubular busbars 1 and the number of tubular busbars 1, and the length of the support steel channel 21 is determined to be able to fully support all the required numbers of tubular busbars 1 at the highest level. The number of tubular busbars 1 is in turn related to the number of fault setting points in the required test scenario. When the distance between adjacent tubular busbars 1 is 450 mm, according to Determine the number of support steel pipes 22 for the support steel channel 21 of the support steel channel, and the stable support requirements for various lengths of the support steel channel 21 can be met with a smaller number of support steel pipes 22.

[0067] Preferably, when this structure is arranged indoors, it is controlled at 2300 mm, and when arranged outdoors, it is controlled at 2500 mm. The distance between the tubular busbars of the tubular busbar is controlled at 2600 mm through the support steel channel 21 and the post insulator 23, so as to facilitate the operation of the test personnel to connect the cable terminals.

[0068] The tubular busbar 1 is fixed to the corresponding post insulator 23 through the busbar fixing fitting 14. Preferably, for each tubular busbar 1, at least one place is fixed to the corresponding post insulator 23 through the busbar fixing fitting 14 that is slidable relative to the tubular busbar 1, and at least one place is fixed to the corresponding post insulator 23 through the busbar fixing fitting 14 that is not slidable relative to the tubular busbar 1. In this embodiment, as Figure 4 shown, the busbar fixing fitting 14 on the left side is slidable relative to the tubular busbar 1, and the one on the right side is not slidable relative to the tubular busbar 1.

[0069] Specifically, the cable support 3 includes a first support and a second support. The first support corresponds to the first T-connection fitting 11, and the second support corresponds to the second T-connection fitting 12. The first support and the second support are respectively located on both sides of the main pipe support 2, that is Figure 4 in, for the two cable supports 3 referred to, the left side is the first support and the right side is the second support.

[0070] Here, the second support is taken as an example to illustrate the support structure, and the first support is similar. As Figure 3 and Figure 4 shown, the second support includes at least two longitudinally extending channel steels 31 that are fixedly arranged on the outer side of the support steel pipe 22 and are arranged at intervals up and down along the extending direction of the support steel channel 21. In this embodiment, two longitudinally extending channel steels 31 are arranged. The side of the longitudinally extending channel steel 31 away from the support steel pipe 22 has a number of cable clamps 32 arranged along the extending direction of the support steel channel 21. The three-phase cables 5 at each fault setting point are fixed to the corresponding longitudinally extending channel steel 31 through the corresponding cable clamps 32. Each single-phase cable 51 at each fault setting point is respectively fixed to the corresponding longitudinally extending channel steel 31 through its respective corresponding cable clamps 32. The longitudinally extending channel steel 31 corresponding to the single-phase cable 51 is located above the longitudinally extending channel steel 31 corresponding to the three-phase cable 5.

[0071] The number of cable clamps 32 provided on the continuous channel steel 31 is related to the number of fault setting points. In this embodiment, five fault setting points are set, so five cable clamps 32 are set on the lower continuous channel steel 31, and each cable clamp 32 corresponds to the three-phase cables 5 of one fault setting point. Fifteen cable clamps 32 are set on the upper continuous channel steel 31, and each cable clamp 32 corresponds to the single-phase cable 51 of one fault setting point.

[0072] As Figure 7 shown, each fault setting point is connected to this device through a cable extension line 6. The two ends of the cable extension line 6 are separated by three phases, and the middle part is arranged with three-phase overlap. The three phases at one end of the cable extension line 6 are respectively connected to the three single-phase cables 51 of the fault setting point. As Figure 7 shown in A, B, and C phases in, due to the perspective problem, the views of the A and C phases overlap. The three phases at the other end are respectively connected to the corresponding three tubular busbars 11, that is, connected to Figure 3 、 Figure 5 shown in the A, B, and C phases. The middle part of the cable extension line 6 serves as the three-phase cable 5 of the corresponding fault setting point, and at the same time is used to lead the fault setting point to the position of this device. The three-phase cable 5 is fixed to at least one continuous channel steel located relatively below through at least one cable clamp for the three-phase cable to climb upward, and then at the position close to the tubular busbar 1, the three phases are separated and serve as the three single-phase cables 51 of the corresponding fault setting point. Each single-phase cable 51 is fixed to at least one continuous channel steel located relatively above through at least one cable clamp and continues to climb upward to the corresponding tubular busbar 1.

[0073] In this embodiment, there are two continuous channel steels 31, upper and lower. Specifically, the cable extension line 6 is fixed to the lower continuous channel steel 31 through the corresponding cable clamp 32 for the three-phase cable 5 to climb upward, and then is separated into three single-phase cables 51 at the position close to the tubular busbar 1. Each single-phase cable 51 is fixed to the upper continuous channel steel 31 through the corresponding cable clamp 32 and continues to climb upward to the corresponding tubular busbar 1, and is connected to the tubular busbar 1 through the second tapping fitting 12 of the corresponding tubular busbar 1. In this way, when a test is needed, only the test cable 7 needs to be connected to the third tapping fitting 13 and the fault simulation unit 4 respectively, which can realize the quick connection between the fault setting point and the fault simulation unit 4, and the operation is simple and the connection is convenient. There is no need to climb the pole for operation, and there will be no problem of damaging the insulation performance of the insulated wire.

[0074] Furthermore, according to the rated current-carrying capacity, short-circuit level, phase spacing, and span, combined with the above relevant parameters, 10kV post insulators are selected in this embodiment. The TR205 insulator has a bending resistance of 8kN and a torsional resistance of 4kN. It is also possible to adopt 20kV post insulators by raising one level. The tubular busbar adopts To meet the requirements of current-carrying capacity, short-circuit dynamic stability, the stiffness and strength of the overlapping cables.

[0075] Consisting of Figures 3 to 5 It can be seen that the layout structure of the distribution device in the fault simulation area of the test base provided by this solution not only fully meets the setting requirements of multiple fault points, but also has a reasonable structure and exquisite layout. The overall width of the distribution device is limited, and fewer civil engineering foundations and supports are required, with high stability. At the same time, the layout type of the distribution device in the fault simulation area of the test base uses the tubular busbar as the grounding point for overlapping, which is conducive to reducing risks and potential hazards such as insulation degradation. Compared with the original method of using piercing clamps on the pole, it reduces the workload of maintenance, repair and operation, and reduces the damage of the piercing clamp to the insulation performance. It can achieve fast, efficient and safe fault tests with a small floor area, and the optimization effect is obvious.

[0076] The specific embodiments described in this document are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0077] Although terms such as tubular busbar 1; first T-connection fitting 11; second T-connection fitting 12; third T-connection fitting 13; tubular busbar fixing fitting 14; tubular busbar terminal ball 15; busbar support 2; support channel steel 21; support steel pipe 22; post insulator 23; earthing flat steel 24; fixing steel plate 25; connecting bolt 26; cable support 3; continuous channel steel 31; cable hoop 32; fault simulation unit 4; three-phase cable 5; single-phase cable 51 are used more frequently in this document, the possibility of using other terms is not excluded. The use of these terms is only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A distribution device layout structure for fault simulation area of ​​a test base, characterized in that: It comprises a plurality of tubular busbars (1), wherein the tubular busbars (1) are supported by a mother tube support (2) to a height of 2m to 3m above the ground; Each tubular busbar (1) has a first T-connecting fitting (11) and a second T-connecting fitting (12) at both ends, and a cable bracket (3) corresponding to the first T-connecting fitting (11) and the second T-connecting fitting (12), respectively. The cable bracket (3) is used to support the cables at both ends of the fault setting point to be connected to the first T-connecting fitting (11) and the second T-connecting fitting (12), respectively, so that the tubular busbar (1) is connected in series to the fault setting point; The tubular busbar (1) has a third T-connection fitting (13) located between the first T-connection fitting (11) and the second T-connection fitting (12), which is used for connecting the fault simulation unit (4).

2. The layout structure of the power distribution device in the fault simulation area of ​​the test base according to claim 1 is characterized in that: Each fault setting point has three phases A, B, and C, and each phase corresponds to a tubular busbar (1); The cables at both ends of the three phases A, B and C of the fault setting point are respectively connected to the first T-connecting fitting (11) and the second T-connecting fitting (12) of the corresponding tubular busbar (1) through a cable bracket (3).

3. The layout structure of the power distribution device in the fault simulation area of ​​the test base according to claim 1 is characterized in that: The structure is used to configure a plurality of fault setting points, each of which has three phases, A, B, and C, and each phase of each fault setting point corresponds to a tubular busbar (1).

4. The layout structure of the power distribution device in the fault simulation area of ​​the test base according to claim 2 or 3, characterized in that: The mother pipe support (2) comprises at least two support channel steels (21) parallel to each other; Each support channel steel (21) is fixedly supported by at least two support steel pipes (22) arranged axially along the support channel steel (21); Each tubular busbar (1) is mounted on the at least two mutually parallel support channel steels (21) via a support insulator (23), and a plurality of tubular busbars (1) are arranged at intervals along the axial direction of the support channel steels (21); The support steel pipe (22) is connected to the main grounding grid via the grounding flat steel (24).

5. The layout structure of the power distribution device in the fault simulation area of ​​the test base according to claim 4 is characterized in that: The tubular busbar (1) is fixed to the corresponding post insulator (23) via a tubular busbar fixing hardware (14); The support channel steel (21) is provided with a fixing steel plate (25), and the support insulator (23) is fixed to the fixing steel plate (25) to fix the corresponding tubular busbar (1) to the corresponding support channel steel (21).

6. The layout structure of the power distribution device in the fault simulation area of ​​the test base according to claim 5 is characterized in that: The tubular busbar (1) is fixed to the corresponding post insulator (23) at least at one place by the tubular mother fixing hardware (14) which is slidable relative to the tubular busbar (1), and is fixed to the corresponding post insulator (23) at least at one place by the tubular mother fixing hardware (14) which is non-slidable relative to the tubular busbar (1); The distance between adjacent busbars is 400mm to 500mm.

7. The layout structure of the power distribution device in the fault simulation area of ​​the test base according to claim 4 is characterized in that: The cable bracket (3) comprises a first bracket and a second bracket, the first bracket corresponds to the first T-connecting fitting (11), the second bracket corresponds to the second T-connecting fitting (12), and the first bracket and the second bracket are respectively located on both sides of the mother pipe bracket (2); The first bracket / the second bracket comprises at least two vertically spaced through-length channel steels (31) fixed to the side of the bracket steel pipe (22) and extending along the extending direction of the bracket channel steel (21); The side of the through-length channel steel (31) away from the support steel pipe (22) is provided with a plurality of cable clamps (32); The three-phase cable (5) at the fault setting point is fixed to at least one corresponding full-length channel steel (31) via at least one cable clamp (32); Each single-phase cable (51) at the fault setting point is fixed to at least one corresponding full-length channel steel (31) via at least one cable clamp (32); The full-length channel steel (31) corresponding to the single-phase cable (51) is located above the full-length channel steel (31) corresponding to the three-phase cable (5); The three-phase cable (5) at the fault setting point is fixed to at least one relatively lower through-length channel steel (31) by at least one cable clamp (32) so that the three-phase cable (5) can climb upwards, and then is separated into single-phase cables (51). Each single-phase cable (51) is fixed to at least one relatively upper through-length channel steel (31) by at least one cable clamp (32), and continues to climb upwards to the corresponding tubular busbar (1), and is connected to the tubular busbar (1) by the first T-joint fitting (11) / second T-joint fitting (12) of the corresponding tubular busbar (1).

8. The layout structure of the power distribution device in the fault simulation area of ​​the test base according to claim 7 is characterized in that: The fault setting point is located at the overhead line, and each fault setting point is divided, and the two divided end points are respectively connected to the first T-connecting fitting (11) and the second T-connecting fitting (12) of the corresponding tubular busbar (1) through the cable extension line (6) and the cable support (3), so that the tubular busbar (1) is connected in series to the fault setting point; The two end points of the fault point are respectively permanently connected to the corresponding cable extension lines (6).

9. The layout structure of the power distribution device in the fault simulation area of ​​the test base according to claim 4, characterized in that: The post insulator (23) is a 10kV post insulator or a 20kV post insulator; The post insulator is made of TR205 with a bending resistance of 8kN and a torsion resistance of 4kN; The tubular busbar (1) adopts LERD- / 72.

10. The layout structure of the power distribution device in the fault simulation area of ​​the test base according to claim 4, characterized in that: The support steel pipes (22) are arranged in two rows and N columns, and the spacing between the two rows of support steel pipes (22) is 2000±200mm, and m represents the number of fault setting points; The tubular busbar (1) is supported by a busbar support (2) to a height of 2.6 m from the ground.

Images