A method and system for optimizing three-phase tube bus structure of double-sided lead switch cabinet

Abstract

The present application relates to the technical field of switch cabinet three-phase pipe bus, and discloses a kind of double-sided lead type switch cabinet three-phase pipe bus structure optimization method and system.The present application constructs initial layout structure scheme according to preset layout design rule;Determine the node coordinates of each phase pipe bus based on the preset coordinate system, extract the coordinate parameters to be measured;Pipe bus is mapped to coordinate plane to construct layout model;Through the model, under the constraint of preset layout design rule and evaluation index condition, the equivalent parameters are optimized and solved, and the target layout structure scheme is determined.Through the systematic coordinate parameter extraction and optimization and solving based on layout model, the layout of three-phase pipe bus is accurately optimized.The problem of electric field aggregation caused by abnormal structure processing is avoided, and the high-risk local hidden danger point is effectively eliminated.The existing switch cabinet pipe bus layout not only increases the pipe bus layout design difficulty, but also easily causes electric field aggregation due to abnormal structure processing, and there is a high-risk partial discharge hidden danger point.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of switch cabinet three-phase busbar, and particularly relates to a method and system for optimizing the structure of a switch cabinet three-phase busbar with double-sided lead wires. BACKGROUND

[0002] Switch cabinets are a very important type of equipment in power grid systems and are widely used in distribution networks. With the development of urban distribution networks, which are facing problems such as high load density and limited land resources, there is a high demand for the miniaturization design of switch cabinets. The miniaturization design of switch cabinets is a key indicator of the level of distribution network automation. Under the condition of ensuring sufficient safety clearance, how to effectively compress the distance between three-phase busbars is the key to realizing the miniaturization design of switch cabinets.

[0003] However, blindly compressing the distance between live conductors and the ground or between phases will result in insufficient safety clearance in the busbar area and potential partial discharge hazards. At the same time, the compression of the space of the three-phase busbar in a certain area will result in poor heat dissipation performance and potential local overheating hazards. The use of a busbar structure can effectively optimize the spatial distance between three-phase busbars, but the spatial layout of the multiple polyline segments of the busbar is prone to unreasonable chamfer design, which can cause charge accumulation hazards.

[0004] Therefore, the existing switch cabinet busbar layout mostly uses a 3-5 polyline segment scheme, but the above method not only increases the design difficulty of the busbar layout, but also easily causes structural processing abnormalities, resulting in electric field accumulation and high-risk partial discharge hazard points. SUMMARY

[0005] The present application provides a method and system for optimizing the structure of a switch cabinet three-phase busbar with double-sided lead wires, which solves the technical problem of the existing switch cabinet busbar layout, which not only increases the design difficulty of the busbar layout, but also easily causes structural processing abnormalities, resulting in electric field accumulation and high-risk partial discharge hazard points.

[0006] The present application provides a method and system for optimizing the structure of a switch cabinet three-phase busbar with double-sided lead wires, which solves the technical problem of the existing switch cabinet busbar layout, which not only increases the design difficulty of the busbar layout, but also easily causes structural processing abnormalities, resulting in electric field accumulation and high-risk partial discharge hazard points.

[0007] According to the preset layout design rules of the three-phase busbar of the switch cabinet, an initial layout structure scheme of the three-phase busbar is constructed;

[0008] Based on a preset coordinate system, the node coordinates of each phase busbar in the initial layout structure scheme are determined, and the to-be-measured coordinate parameters of the node coordinates of each phase busbar are extracted;

[0009] Each phase busbar is mapped to the coordinate plane of the preset coordinate system to construct a busbar layout model;

[0010] Based on the constraint condition of the preset layout design rule and the preset evaluation index condition, the optimization solution is performed on each of the to-be-measured coordinate parameters through the bus duct layout model, the optimal value range of each of the to-be-measured coordinate parameters is determined according to a solution result, and the initial layout structure scheme is updated to generate a target layout structure scheme.

[0011] Optionally, the initial layout structure scheme of the three-phase bus duct is constructed according to the preset layout design rule of the three-phase bus duct of the switch cabinet, and the initial layout structure scheme of the three-phase bus duct includes:

[0012] The preset layout design rule of the three-phase bus duct of the switch cabinet is acquired.

[0013] Based on the preset layout design rule, the arrangement mode and the spatial layout of the three-phase bus duct are determined.

[0014] According to the arrangement mode and the spatial layout of the three-phase bus duct, the start node, the first interpolation node, the second interpolation node and the terminal node of each phase bus duct corresponding to the three-phase bus duct are determined.

[0015] The start node, the first interpolation node, the second interpolation node and the terminal node of the first phase bus duct are sequentially connected to construct the first phase bus duct.

[0016] The start node, the first interpolation node, the second interpolation node and the terminal node of the second phase bus duct are sequentially connected to construct the second phase bus duct.

[0017] The start node, the first interpolation node, the second interpolation node and the terminal node of the third phase bus duct are sequentially connected to construct the third phase bus duct.

[0018] Based on the preset layout design rule, the initial layout structure scheme of the three-phase bus duct is constructed by using the first phase bus duct, the second phase bus duct and the third phase bus duct.

[0019] Optionally, based on the preset coordinate system, the node coordinates corresponding to the nodes of each phase bus duct in the initial layout structure scheme are determined, and the to-be-measured coordinate parameters of the node coordinates of each phase bus duct are extracted, and the method includes:

[0020] The start node of the second phase bus duct is taken as an end point to construct a preset coordinate system.

[0021] According to the preset three-phase conductor three-fold line layout and the preset safety clearance, the coordinates of the nodes of each phase bus duct in the initial layout structure scheme on the preset coordinate system are determined to generate a plurality of node coordinates.

[0022] Based on a preset bus duct line segment design rule, the line segment length of a line segment between the second interpolation node and the terminal node of each phase bus duct is set.

[0023] updating the node coordinates of the second interpolation nodes according to the segment length, to generate updated second interpolation node coordinates;

[0024] extracting the first interpolation node coordinates of each phase bus and the to-be-measured coordinate parameters corresponding to the updated second interpolation node coordinates.

[0025] Optionally, the mapping of each phase bus to the coordinate plane of the preset coordinate system to construct the busbar layout model comprises:

[0026] mapping the first phase bus to the YZ plane of the preset coordinate system to construct a first phase bus layout model;

[0027] mapping the second phase bus to the XZ plane and the YZ plane of the preset coordinate system to construct a second phase bus layout model;

[0028] mapping the third phase bus to the XZ plane and the YZ plane of the preset coordinate system to construct a third phase bus layout model;

[0029] constructing the busbar layout model by using the first phase bus layout model, the second phase bus layout model, and the third phase bus layout model.

[0030] Optionally, the constraint conditions of the preset layout design rule specifically comprise:

[0031] according to the preset layout design rule, setting the center distance between each busbar and between the busbar and the shell to be not less than the preset safety clearance;

[0032] according to the preset layout design rule, setting the busbar polyline segment to be not less than a preset segment length;

[0033] according to the preset layout design rule, setting the corner of the polyline busbar to be not less than a preset space angle;

[0034] obtaining the polyline segment length between the first interpolation node and the second interpolation node of the third phase bus, and according to the preset layout design rule, setting the minimum distance between the polyline segment length and the second interpolation node of the second phase bus to be not less than the preset safety clearance;

[0035] According to the preset layout design rule, the outgoing direction of the start node of each phase bus is set as a vertical plane, and the phase angle between the outgoing direction of the start node of the first phase bus and the vertical direction is a first preset angle, the phase angle between the outgoing direction of the start node of the second phase bus and the vertical direction is a second preset angle, and the phase angle between the outgoing direction of the start node of the third phase bus and the vertical direction is a third preset angle.

[0036] According to the preset layout design rule, the outgoing direction of the terminal node of each phase bus is set as a horizontal plane.

[0037] Optionally, based on the constraint condition and the preset evaluation index condition of the preset layout design rule, the pipe bus layout model is used to optimize and solve each of the to-be-measured coordinate parameters, the optimal value range of each of the to-be-measured coordinate parameters is determined according to a solving result, and the initial layout structure scheme is updated to generate a target layout structure scheme, including:

[0038] Based on the constraint condition that the center distance between the pipe bus and the shell is not less than the preset safety clearance, the first phase pipe bus layout model of the pipe bus layout model is used to optimize the to-be-measured coordinate parameters of the first phase pipe bus, and the equivalent parameters corresponding to the to-be-measured coordinate parameters of the first phase pipe bus are determined according to a first optimization result.

[0039] Based on the constraint condition that the corner of the polyline pipe bus is not less than a preset space angle and the pipe bus polyline segment is not less than a preset line segment length, the second phase pipe bus layout model of the pipe bus layout model is used to optimize the to-be-measured coordinate parameters of the second phase pipe bus, and the equivalent parameters corresponding to the to-be-measured coordinate parameters of the second phase pipe bus are determined according to a second optimization result.

[0040] Based on the constraint condition that the minimum distance between the polyline segment length and the second interpolation node of the second phase pipe bus is not less than the preset safety clearance, the third phase pipe bus layout model of the pipe bus layout model is used to optimize the to-be-measured coordinate parameters of the third phase pipe bus, and the equivalent parameters corresponding to the to-be-measured coordinate parameters of the third phase pipe bus are determined according to a third optimization result.

[0041] Based on the preset evaluation index condition, the equivalent parameters corresponding to the to-be-measured coordinate parameters of the first phase pipe bus, the second phase pipe bus and the third phase pipe bus are optimized and solved, the optimal value range of each of the equivalent parameters is determined according to a solving result, and the initial layout structure scheme is updated to generate an updated layout structure scheme.

[0042] The pipe buses in the updated layout structure scheme are sequentially subjected to design rationality evaluation and design effect evaluation, and a target layout structure scheme is obtained according to an evaluation result.

[0043] The second aspect of the present application provides a three-phase busbar structure optimization system for a double-sided lead switch cabinet, comprising:

[0044] A construction module is configured to construct an initial layout structure scheme of the three-phase busbar according to preset layout design rules of the three-phase busbar of the switch cabinet.

[0045] An extraction module is configured to determine node coordinates corresponding to nodes of each phase busbar in the initial layout structure scheme based on a preset coordinate system, and extract to-be-measured coordinate parameters of the node coordinates of each phase busbar.

[0046] A mapping module is configured to map each phase busbar to a coordinate plane of the preset coordinate system to construct a busbar layout model.

[0047] A solving module is configured to perform optimization and solving on each to-be-measured coordinate parameter through the busbar layout model based on constraint conditions of the preset layout design rules and preset evaluation index conditions, determine an optimal value range of each to-be-measured coordinate parameter according to a solving result, and update the initial layout structure scheme to generate a target layout structure scheme.

[0048] Optionally, the construction module comprises:

[0049] An acquisition sub-module is configured to acquire preset layout design rules of the three-phase busbar of the switch cabinet.

[0050] A layout sub-module is configured to determine an arrangement mode and a spatial layout of the three-phase busbar based on the preset layout design rules.

[0051] A node sub-module is configured to determine a start node, a first interpolation node, a second interpolation node, and a terminal node of each phase busbar corresponding to the three-phase busbar according to the arrangement mode and the spatial layout of the three-phase busbar.

[0052] A first construction sub-module is configured to sequentially connect the start node, the first interpolation node, the second interpolation node, and the terminal node of the first phase busbar to construct the first phase busbar.

[0053] A second construction sub-module is configured to sequentially connect the start node, the first interpolation node, the second interpolation node, and the terminal node of the second phase busbar to construct the second phase busbar.

[0054] A third construction sub-module is configured to sequentially connect the start node, the first interpolation node, the second interpolation node, and the terminal node of the third phase busbar to construct the third phase busbar.

[0055] A fourth construction sub-module is configured to construct an initial layout structure scheme of the three-phase pipe bus based on the preset layout design rule and using the first phase pipe bus, the second phase pipe bus and the third phase pipe bus.

[0056] The third aspect of the present application provides a computer readable storage medium having a computer program stored thereon, the computer program being executed to implement the three-phase pipe bus structure optimization method of the double-sided lead type switch cabinet according to any one of the above.

[0057] The fourth aspect of the present application provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, wherein when the program instructions are executed by a computer, the computer is caused to execute the three-phase pipe bus structure optimization method of the double-sided lead type switch cabinet according to any one of the above.

[0058] From the above technical solutions, the present application has the following advantages:

[0059] The present application is aimed at the layout design of the three-phase pipe bus of the switch cabinet. Firstly, an initial layout structure scheme is constructed according to the preset layout design rule. Then, the node coordinates of each phase pipe bus are determined based on the preset coordinate system, and the to-be-measured coordinate parameters are extracted. Then, the pipe bus is mapped to the coordinate plane to construct a layout model. Finally, through the model, the equivalent parameters are optimized and solved under the constraints of the preset layout design rule and the evaluation index conditions, and the target layout structure scheme is determined. The present application accurately optimizes the layout of the three-phase pipe bus through systematic coordinate parameter extraction and optimization and solving based on the layout model. The problem of electric field aggregation caused by abnormal structure processing is avoided, the high-risk local hidden danger points are effectively eliminated, the electrical safety and stability of the switch cabinet are significantly improved, the probability of failure caused by local electric field abnormalities is reduced, the service life of the equipment is prolonged, and the optimized layout also helps to improve the production and processing efficiency and product quality, thereby providing a strong guarantee for the safe and reliable operation of the switch cabinet. BRIEF DESCRIPTION OF DRAWINGS

[0060] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0061] Figure 1 A step flow chart of a three-phase pipe bus structure optimization method of a double-sided lead type switch cabinet according to the first embodiment of the present application is provided.

[0062] Figure 2A step flow chart of a double-sided lead type switch cabinet three-phase pipe bus structure optimization method provided for the second embodiment of the present application is provided.

[0063] Figure 3 A three-phase pipe bus spatial layout design drawing provided for the second embodiment of the present application is provided.

[0064] Figure 4 A modeling schematic diagram of A-phase pipe bus mapping to YZ plane spatial layout calculation provided for the second embodiment of the present application is provided.

[0065] Figure 5 A modeling schematic diagram of B-phase and C-phase pipe bus mapping to XZ plane spatial layout calculation provided for the second embodiment of the present application is provided.

[0066] Figure 6 A modeling schematic diagram of B-phase and C-phase pipe bus mapping to YZ plane spatial layout calculation provided for the second embodiment of the present application is provided.

[0067] Figure 7 A flow schematic diagram of solving a target layout structure scheme provided for the second embodiment of the present application is provided.

[0068] Figure 8 A structure block diagram of a double-sided lead type switch cabinet three-phase pipe bus structure optimization system provided for the third embodiment of the present application is provided. DETAILED DESCRIPTION

[0069] The embodiment of the present application provides a double-sided lead type switch cabinet three-phase pipe bus structure optimization method and system, which is used for solving the technical problems that the existing switch cabinet pipe bus layout not only increases the design difficulty of the pipe bus layout, but also easily causes structure processing abnormalities to cause electric field aggregation and exist high-risk partial discharge hidden point.

[0070] In order to make the invention purpose, features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the following described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0071] In the design of the existing switch cabinet bus area, the three-phase pipe bus adopts a 3-5 segment polyline structure, the layout design of the pipe bus is more complex, and the electric field aggregation hidden danger caused by the process problem is also easy to exist. Moreover, the three-phase pipe bus spatial three-dimensional structure is complex, and there are many parameters to be calculated and optimized, and the rapid optimization problem containing 8-10 parameters often occurs, and there is a lack of effective simplified calculation means in engineering.

[0072] Please refer toFigure 1 , Figure 1 A step flow chart of a three-phase busbar structure optimization method for a double-sided lead type switch cabinet is provided.

[0073] The three-phase busbar structure optimization method for a double-sided lead type switch cabinet provided by the application comprises the following steps:

[0074] Step 101, constructing an initial layout structure scheme of the three-phase busbar according to preset layout design rules of the three-phase busbar of the switch cabinet.

[0075] In the embodiment of the application, the switch cabinet refers to an electrical device used for opening, closing, controlling and protecting electrical equipment in the process of power generation, power transmission, power distribution and power conversion in the power system. In modern power systems, many places such as urban substations, commercial center power distribution rooms and data centers have very valuable space resources. Small-sized switch cabinets can install more equipment in limited space, improve space utilization, make the layout of power equipment more compact and reasonable, help to reduce the floor area of the power distribution room and reduce the construction cost.

[0076] The three-phase busbar refers to an electrical device for transmitting three-phase alternating current, which is usually composed of three hollow metal pipes, representing the three phases of three-phase power supply, namely A phase (i.e. first phase busbar), B phase (i.e. second phase busbar) and C phase (i.e. third phase busbar).

[0077] The preset layout design rules refer to a series of principles and requirements followed in the rational planning and arrangement of the three-phase busbar in the electrical system to ensure the safety, reliability and efficiency of power transmission.

[0078] The initial layout structure scheme refers to the initial arrangement mode and relative position relationship scheme of the three-phase busbar in space in the early stage of electrical equipment installation.

[0079] By obtaining a series of principles and requirements followed in the rational planning and arrangement of the three-phase busbar of the switch cabinet, the initial arrangement mode and relative position relationship scheme of the three-phase busbar in space is constructed according to the above principles and requirements.

[0080] Step 102, determining the node coordinates corresponding to each phase busbar node in the initial layout structure scheme based on the preset coordinate system, and extracting the to-be-measured coordinate parameters of the node coordinates of each phase busbar.

[0081] In the embodiment of the application, the node of each phase busbar refers to the start node (A0), the first interpolation node (A1), the second interpolation node (A2) and the terminal node (A3) of the A phase busbar (i.e. the first phase busbar). n); a start node (B0), a first interpolation node (B1), a second interpolation node (B2) and a terminal node (B n ); a start node (C0), a first interpolation node (C1), a second interpolation node (C2) and a terminal node (C n ).

[0082] The preset coordinate system refers to a three-degree-of-freedom coordinate system XYZ established based on the node B0. n C n The direction of the vector B0C0 is the positive direction of the X axis, the direction parallel to the vector B n C n is the positive direction of the Y axis, and the direction parallel to the vector A0A1 is the positive direction of the Z axis.

[0083] The node coordinates refer to the coordinate information of each node in the three-degree-of-freedom coordinate system XYZ.

[0084] The to-be-measured coordinate parameters refer to parameters related to coordinates that need to be determined through certain methods and means during measurement or positioning.

[0085] The known node coordinates of each node of the A-phase pipe bus, the B-phase pipe bus and the C-phase pipe bus in the initial layout structure scheme in the three-degree-of-freedom coordinate system XYZ are obtained, and the coordinate value range of the remaining nodes is predicted through the known node coordinates.

[0086] Step 103, mapping each phase pipe bus to the coordinate plane of the preset coordinate system to construct a pipe bus layout model.

[0087] In the embodiments of the application, the coordinate plane refers to a plane composed of two mutually perpendicular number axes with a common origin in mathematics.

[0088] The pipe bus layout model refers to a model for describing and planning the arrangement mode of the pipe bus in the electrical system.

[0089] The A-phase pipe bus is mapped in the YZ plane, the B-phase pipe bus is mapped in the XZ plane and the YZ plane, and the C-phase pipe bus is mapped in the XZ plane and the YZ plane to construct a pipe bus layout model.

[0090] Step 104, based on the constraint conditions of the preset layout design rules and the preset evaluation index conditions, the to-be-measured coordinate parameters are solved through the pipe bus layout model, the optimal value range of each to-be-measured coordinate parameter is determined according to the solving result, and the initial layout structure scheme is updated to generate a target layout structure scheme.

[0091] In the embodiment of the present application, the constraint condition of the preset layout design rule refers to a condition required to be met by a series of principles and requirements followed by reasonable planning and arrangement of the three-phase busbar.

[0092] The preset evaluation index condition refers to a condition required to be met by the design effect of the layout structure of the three-phase busbar.

[0093] The target layout structure scheme refers to an optimal space structure scheme obtained by respectively evaluating and optimizing the initial space structure scheme.

[0094] Under the constraint condition of the preset layout design rule and the preset evaluation index condition, the optimal value range of each to-be-tested coordinate parameter is obtained by optimizing the to-be-tested coordinate parameter through the busbar layout model, and the layout structure scheme is updated according to the optimal value range of the to-be-tested coordinate parameter to obtain the target layout structure scheme.

[0095] Please refer to Figure 2 , Figure 2 A step flowchart of a three-phase busbar structure optimization method of a double-sided lead type switch cabinet is provided for the second embodiment of the present application.

[0096] Figure 3 A space layout design diagram of the three-phase busbar is provided for the second embodiment of the present application.

[0097] Figure 4 A modeling schematic diagram of space layout calculation of the A-phase busbar mapped to the YZ plane is provided for the second embodiment of the present application.

[0098] Figure 5 A modeling schematic diagram of space layout calculation of the B-phase and C-phase busbars mapped to the XZ plane is provided for the second embodiment of the present application.

[0099] Figure 6 A modeling schematic diagram of space layout calculation of the B-phase and C-phase busbars mapped to the YZ plane is provided for the second embodiment of the present application.

[0100] Figure 7 A flowchart of solving the target layout structure scheme is provided for the second embodiment of the present application.

[0101] The three-phase busbar structure optimization method of the double-sided lead type switch cabinet provided by the present application comprises the following steps.

[0102] Step 201, obtaining a preset layout design rule of a three-phase busbar of a switch cabinet.

[0103] In the embodiment of the present application, the constraint condition involved in obtaining the preset layout design rule of the three-phase busbar of the switch cabinet is as follows:

[0104] (1) Safety clearance requirement: the center distance between the tubular bus and the shell shall meet the requirement of not less than the preset safety clearance d (i.e. the preset safety clearance). The value of d can be selected according to the voltage grade of the switch cabinet, the insulation performance, and the specific design requirement.

[0105] (2) Size requirement of the polyline segment of the tubular bus: due to the need of chamfer design of the tubular bus, the polyline segment of the tubular bus shall meet the requirement of not less than the preset length m (i.e. the preset segment length). The value of m can be selected according to the voltage grade of the switch cabinet, the outer diameter of the tubular bus, and the process mode requirement.

[0106] (3) Corner requirement of the polyline tubular bus: due to the electric field aggregation problem existing in the chamfer between the polyline segments, partial discharge hidden danger is easy to occur, and the corner of the polyline tubular bus shall meet the requirement of not less than the spatial angle of 90°.

[0107] (4) Direction of the three-phase tubular bus starting node: the directions of the nodes A0, B0 and C0 shall be in the vertical plane, the phase angle between the direction of the node A0 and the vertical direction is 0°, the phase angle between the direction of the node B0 and the vertical direction is θ B , and the phase angle between the direction of the node C0 and the vertical direction is θ C .

[0108] (5) Direction of the three-phase tubular bus terminal node: the directions of the nodes A n , B n and C n shall be in the horizontal plane and parallel to the direction of the segment A0B0C0.

[0109] (6) Spatial layout of the tubular bus: the nodes A n and B n shall be arranged on the two sides of the node B0, so as to compress the spatial size occupied by the three-phase tubular bus.

[0110] (7) In the case of meeting the above design rules, the structure scheme with shorter tubular bus size shall be selected in the optimization, so as to release more space.

[0111] It is worth mentioning that the initial layout structure scheme proposed in the application has the characteristics of clear three-phase tubular bus spacing division. Due to the phase angle θ B of the B-phase tubular bus and the phase angle θ C of the C-phase tubular bus, a certain safety clearance area needs to be added on the side end of the C-phase tubular bus, but it can be optimized to release a larger safety clearance area.

[0112] Step 202, determining the arrangement mode and spatial layout of the three-phase tubular bus based on the preset layout design rule.

[0113] In the embodiments of the present application, the arrangement manner refers to the installation and arrangement form of the three-phase busbar in the electrical equipment or electrical system.

[0114] The spatial layout refers to the arrangement manner and positional relationship of the three busbars (representing A phase, B phase, and C phase respectively) in the electrical equipment installation space, and the spatial relationship between them and other electrical equipment, building structure, etc.

[0115] In specific embodiments, referring to Figure 3 , according to the preset layout design rule, the three-phase busbar of the present application adopts a horizontal and straight arrangement manner, sequentially for A, B, and C three phases, and adopts a three-fold line structure spatial layout.

[0116] Step 203, according to the arrangement manner and spatial layout of the three-phase busbar, determining the start node, first interpolation node, second interpolation node, and terminal node of each phase busbar corresponding to the three-phase busbar.

[0117] In the embodiments of the present application, the start node refers to the end of each phase busbar leading out busbar start node, respectively node A0, B0, C0.

[0118] The terminal node refers to the terminal node of each phase busbar, respectively node A n , B n , C n .

[0119] The first interpolation node refers to the first interpolation node of the fold line type busbar, respectively node A1, B1, C1.

[0120] The second interpolation node refers to the second interpolation node of the fold line type busbar, respectively node A2, B2, C2.

[0121] The three-phase busbar adopts a horizontal and straight arrangement manner, and adopts a three-fold line structure spatial layout, so as to know that the end of each phase busbar leading out busbar start node A0, B0, C0; the terminal node of each phase busbar A n , B n , C n ; and the fold line end points A1, B1, C1 and A2, B2, C2 of the two fold lines.

[0122] Step 204, sequentially connecting the start node, first interpolation node, second interpolation node, and terminal node of the first phase busbar to construct the first phase busbar.

[0123] In the embodiments of the present application, the start node A0, first interpolation node A1, second interpolation node A2, and terminal node A nConnect, i.e. connect the polyline segment A0-A1-A2-A n A phase bus is constructed. Among them, node A n is arranged close to the sleeve side.

[0124] Step 205, sequentially connect the start node, the first interpolation node, the second interpolation node and the terminal node of the second phase bus, and construct the second phase bus.

[0125] In the embodiment of the application, the start node B0, the first interpolation node B1, the second interpolation node B2 and the terminal node B n Connect, i.e. connect the polyline segment B0-B1-B2-B n A B phase bus is constructed.

[0126] Step 206, sequentially connect the start node, the first interpolation node, the second interpolation node and the terminal node of the third phase bus, and construct the third phase bus.

[0127] In the embodiment of the application, the start node C0, the first interpolation node C1, the second interpolation node C2 and the terminal node C n Connect, i.e. connect the polyline segment C0-C1-C2-C n A C phase bus is constructed.

[0128] Step 207, based on a preset layout design rule, adopt the first phase bus, the second phase bus and the third phase bus to construct an initial layout structure scheme of the three-phase bus.

[0129] In the embodiment of the application, under the preset layout design rule, refer to Figure 3 The initial layout structure scheme of the three-phase bus of the application is suitable for busbar lead connection in the load switch room / circuit breaker room of the switch cabinet. Specifically, the sleeve introduces the busbar from the cable incoming room to the load switch room (or introduces the busbar from the circuit breaker room to the cable outgoing room). The three-phase sleeve adopts a horizontal and straight arrangement mode, and is sequentially A, B and C three phases, and the end part introduces the busbar start nodes A0, B0 and C0; the three-phase bus adopts a three-fold line structure space layout, and the busbar terminal nodes are A n , B n , C n , A n is arranged close to the sleeve side, and C n is arranged away from the sleeve side; nodes A n , B n , C n adopt a horizontal and straight arrangement mode, and are arranged in a plane with the start node B0, i.e. the line segment A0B0C0 is parallel to the line segment A n Bn C n Orthogonal in space; broken line segment A0-A1-A2-A n A phase bus is constructed, and broken line segment B0-B1-B2-B n B phase bus is constructed, and broken line segment C0-C1-C2-C n C phase bus is constructed, and the end of the three-phase bus is led out to the corresponding load switch or circuit breaker area by fixed connection of the bus bar lead-out line; in terms of spatial layout, the lead-out direction B2B n of the B phase bus and the lead-out direction C2C n of the C phase bus are in the same direction as the bus bar lead-out line direction, and the lead-out direction A2A n of the A phase bus is in the opposite direction of the bus bar lead-out line direction.

[0130] Step 208, based on the preset coordinate system, determine the node coordinates corresponding to each node of the phase bus in the initial layout structure scheme, and extract the to-be-measured coordinate parameters of the node coordinates of each phase bus.

[0131] In the embodiment of the application, according to the known node coordinates of each node of the A phase bus, the B phase bus and the C phase bus in the initial layout structure scheme on the three-degree-of-freedom coordinate system XYZ, the coordinate value range of the remaining nodes is predicted, the coordinate value range of the predicted node coordinates is extracted, and the to-be-measured coordinate parameters in each predicted node coordinate are obtained.

[0132] Further, step 208 includes the following steps:

[0133] S11, taking the starting node of the second phase bus as an end point, a preset coordinate system is constructed.

[0134] In the embodiment of the application, the establishment of the preset coordinate system: a three-degree-of-freedom coordinate system XYZ is established with node B0. Among them, the direction of vector B0C0 is the positive direction of X axis, parallel to the direction of vector B n C n the direction of vector A0A1 is the positive direction of Z axis.

[0135] S12, according to the preset three-phase conductor three-fold line layout and the preset safety clearance, the coordinates of the nodes of each phase bus in the initial layout structure scheme on the preset coordinate system are determined, and a plurality of node coordinates are generated.

[0136] In the embodiment of the application, the preset three-phase conductor three-fold line layout refers to a special conductor arrangement, that is, the three-phase conductor is arranged as three broken lines similar to the shape of “Z”.

[0137] The preset safe clearance refers to the minimum space distance between different live parts and between the live parts and the grounded parts in the installation and operation of the three-phase pipe bus, so as to ensure the safe and reliable operation of the electrical equipment and prevent electrical breakdown, discharge and other faults.

[0138] The node coordinates of each node are set according to the preset three-fold line layout between the three-phase conductors and the preset safe clearance, and are as follows:

[0139] The calibration of the start nodes A0, B0 and C0 of the three-phase pipe bus: the coordinate of node B0 is (0, 0, 0); the installation center distance of the three-phase sleeve is d0, so the coordinate of node A0 is (-d0, 0, 0) and the coordinate of node C0 is (d0, 0, 0).

[0140] The calibration of the terminal nodes A n , B n , C n of the three-phase pipe bus: nodes A n , B n , C n are arranged in the same plane as node B0, the center distance between nodes A n , B n , C n is d n , the safe clearance (i.e. the preset safe clearance) between the corresponding conductors (between the conductors and the shell) is d, and the distance between node B n and node B0 in the y-axis direction is defined as l, so the coordinate of node A n is (0, l-d n , 2d), the coordinate of node B n is (0, l, 2d), and the coordinate of node C n is (0, l+d n , 2d).

[0141] The calibration of the interpolation nodes of the A-phase pipe bus: the A-phase pipe bus is designed according to the three-fold line, and the calculation of the first interpolation node A1 and the first interpolation node A2 is required. Based on the layout rules of the A-phase pipe bus, the coordinate of node A1 is (-d0, 0, z A1 ), and the coordinate of node A2 is (x A2 , l-d n , 2d). z A1 and x A2 are the coordinate parameters to be solved (i.e. the coordinate parameters to be measured).

[0142] The calibration of the interpolation nodes of the B-phase pipe bus: the B-phase pipe bus is designed according to the three-fold line, and the calculation of the first interpolation node B1 and the second interpolation node B2 is required. Based on the layout rules of the B-phase pipe bus, the coordinate of node B1 is (x B1 , 0, z B1 ).), the B2 coordinate of the node is (x B2 , l, 2d). x B1 , z B1 and x B2 are coordinate parameters required to be calculated.

[0143] Calibration of the interpolation node of the C-phase bus bar: the C-phase bus bar is designed as a three-fold line, and the first interpolation node C1 and the second interpolation node C2 need to be calculated. Based on the layout rule of the C-phase bus bar, the C1 coordinate of the node is (x C1 , 0, z C1 ), and the C2 coordinate of the node is (x C2 , l+d n , 2d). x C1 , z C1 and x C2 are coordinate parameters required to be calculated.

[0144] S13, based on the preset bus bar fold line segment design rule, the line segment length between the second interpolation node and the terminal node of each phase bus bar is set.

[0145] In the embodiment of the application, the preset bus bar fold line segment design rule refers to a design rule aiming to ensure the safe and reliable operation of the three-phase bus bar and reduce electrical and mechanical problems caused by unreasonable fold line segment design, such as overheating, corona, mechanical stress concentration, etc.

[0146] Specifically, the initial layout structure scheme proposed by the application is easy to meet the design requirements of the three-fold line layout among the three-phase conductors and the safety clearance. In order to release more safety clearance space, the values of the fold line segments A2A n , B2B n and C2C n can be compressed. According to the preset bus bar fold line segment design rule, the line segment lengths of the fold line segments A2A n , B2B n and C2C n are m.

[0147] S14, the node coordinates of the second interpolation node are updated according to the line segment length, and the updated second interpolation node coordinates are generated.

[0148] In the embodiment of the application, the updated second interpolation coordinates refer to the new coordinates obtained after updating the second interpolation coordinates of each phase bus bar.

[0149] According to the preset bus bar fold line segment design rule, the line segment lengths of the fold line segments A2A n , B2B n and C2C nThe length of the line segment is m. The multi-parameter optimization of the pipe bus space layout calculation in the simplified initial layout structure scheme is taken as x A2 =-m, x B2 =x C2 =m.

[0150] Based on the above simplification, the first interpolation node coordinates and the updated second interpolation node coordinates are A1(-d0, 0, z A1 ), A2(-m, l-d n , 2d), B1(x B1 , 0, z B1 ), B2(m, l, 2d), C1(x C1 , 0, z C1 ), C2(m, l+d n , 2d), all of which need to meet the design requirement of safety clearance ≥d.

[0151] S15, extract the first interpolation node coordinates and the updated second interpolation node coordinates of each phase pipe bus corresponding to the to-be-measured coordinate parameters.

[0152] In the embodiment of the application, the first interpolation node coordinates and the updated second interpolation node coordinates are A1(-d0, 0, z A1 ), A2(-m, l-d n , 2d), B1(x B1 , 0, z B1 ), B2(m, l, 2d), C1(x C1 , 0, z C1 ), C2(m, l+d n , 2d). z A1 and x A2 are coordinate parameters (i.e. to-be-measured coordinate parameters) required for calculation. The to-be-measured coordinate parameters of the above nodes required for calculation in the initial layout structure scheme optimization of the three-phase pipe bus are l, z A1 , x B1 , z B1 , x C1 , z C1 , the parameter set is {l, z A1 , x B1 , z B1 , x C1 , z C1}, and the optimization of the above six parameters needs to be performed.

[0153] Step 209, map each phase pipe bus to the coordinate plane of the preset coordinate system, and construct a pipe bus layout model.

[0154] In the embodiment of the present application, the A, B and C phase busbars are respectively mapped to the coordinate planes of the corresponding three-degree-of-freedom coordinate system XYZ to construct the busbar layout model.

[0155] Further, the step 209 comprises the following steps:

[0156] S21, mapping the first phase busbar to the YZ plane of the preset coordinate system to construct the first phase busbar layout model.

[0157] In the embodiment of the present application, referring to Figure 4 , the A phase busbar is mapped to the YZ plane of the three-degree-of-freedom coordinate system XYZ to construct the first phase busbar layout model, wherein the A phase busbar needs to satisfy the safety clearance distance from the shell ≥d.

[0158] S22, mapping the second phase busbar to the XZ plane and the YZ plane of the preset coordinate system to construct the second phase busbar layout model.

[0159] In the embodiment of the present application, referring to Figure 5 and Figure 6 , the B phase busbar is mapped to the XZ plane and the YZ plane of the three-degree-of-freedom coordinate system XYZ to construct the second phase busbar layout model, wherein the B phase busbar needs to satisfy the spatial angle of each line segment ≥90°, that is, the line segment B1B2 needs to be parallel to the YZ plane. n satisfy the spatial angle ≥90°, the parameter x B1 should be taken as x B1 =m is optimal (that is, the line segment B1B2 is parallel to the YZ plane). The parameter z B1 can be calculated by the following relationship: z B1 =m / tanθ B .

[0160] S23, mapping the third phase busbar to the XZ plane and the YZ plane of the preset coordinate system to construct the third phase busbar layout model.

[0161] In the embodiment of the present application, referring to Figure 5 and Figure 6 , the C phase busbar is mapped to the XZ plane and the YZ plane of the three-degree-of-freedom coordinate system XYZ to construct the third phase busbar layout model, wherein the C phase busbar needs to satisfy that the minimum distance of C1C2 from the node B2 should be ≥d, and the boundary minimum distance is taken to calculate.

[0162] S24, using the first phase busbar layout model, the second phase busbar layout model and the third phase busbar layout model to construct the busbar layout model.

[0163] In the embodiment of the present application, the first phase busbar layout model, the second phase busbar layout model and the third phase busbar layout model are respectively constructed by using the above steps S21-S23, and the busbar layout model is obtained.

[0164] Further, before step 210, the constraint conditions of the preset layout design rules specifically include the following steps:

[0165] S31, according to the preset layout design rules, the center distance between each busbar and the busbar, and between the busbar and the shell is set to be not less than the preset safety clearance.

[0166] In the embodiment of the present application, according to the requirement of the preset layout design rules of the three-phase busbar for the safety clearance, the center distance between the busbars and between the busbar and the shell should be not less than the set safety clearance d (i.e. the preset safety clearance). The value of d can be selected according to the voltage grade of the switch cabinet, the insulation performance, and the specific design requirements.

[0167] S32, according to the preset layout design rules, the busbar polyline segment is set to be not less than the preset line segment length.

[0168] In the embodiment of the present application, according to the requirement of the preset layout design rules of the three-phase busbar for the size of the busbar polyline segment (i.e. the preset line segment length), the busbar polyline segment should be not less than the set length m (i.e. the preset line segment length) due to the need for busbar chamfer design. The value of m can be selected according to the voltage grade of the switch cabinet, the outer diameter of the busbar, and the process mode requirements.

[0169] S33, according to the preset layout design rules, the corner of the polyline busbar is set to be not less than the preset space angle.

[0170] In the embodiment of the present application, according to the requirement of the preset layout design rules of the three-phase busbar for the corner of the polyline busbar, the corner of the polyline busbar should be not less than the space angle 90° (i.e. the preset space angle) due to the problem of electric field aggregation between the chamfer segments, which is prone to partial discharge hazards.

[0171] S34, the polyline segment length between the first interpolation node and the second interpolation node of the third phase busbar is obtained, and according to the preset layout design rules, the minimum distance between the polyline segment length and the second interpolation node of the second phase busbar is set to be not less than the preset safety clearance.

[0172] In the embodiment of the present application, the polyline segment length C1C2 of the C-phase busbar is obtained, and according to the preset layout design rules, the C-phase busbar needs to satisfy that the minimum distance between C1C2 and node B2 should be ≥ safety clearance d.

[0173] S35, according to the preset layout design rule, the outgoing direction of the start node of each phase pipe bus is set as a vertical plane, and the phase angle between the outgoing direction of the start node of the first phase pipe bus and the vertical direction is a first preset angle, the phase angle between the outgoing direction of the start node of the second phase pipe bus and the vertical direction is a second preset angle, and the phase angle between the outgoing direction of the start node of the third phase pipe bus and the vertical direction is a third preset angle.

[0174] In the embodiment of the application, according to the requirement for the outgoing direction of the start node of the three-phase pipe bus in the preset layout design rule of the three-phase pipe bus, the outgoing direction of the nodes A0, B0 and C0 should be in the vertical plane, the phase angle between the outgoing direction of the node A0 and the vertical direction is 0°, the phase angle between the outgoing direction of the node B0 and the vertical direction is θ B , and the phase angle between the outgoing direction of the node C0 and the vertical direction is θ C .

[0175] It is worth mentioning that the first preset angle is 0°, the second preset angle is θ B , and the third preset angle is θ C .

[0176] S36, according to the preset layout design rule, the outgoing direction of the terminal node of each phase pipe bus is set as a horizontal plane.

[0177] In the embodiment of the application, according to the requirement for the outgoing direction of the terminal node of the three-phase pipe bus in the preset layout design rule of the three-phase pipe bus, the outgoing direction of the nodes A n , B n and C n should be in the horizontal plane and parallel to the direction of the line segment A0B0C0.

[0178] Step 210, based on the constraint condition of the preset layout design rule and the preset evaluation index condition, the pipe bus layout model is used to optimize and solve each to-be-measured coordinate parameter, the optimal value range of each to-be-measured coordinate parameter is determined according to the solving result, and the initial layout structure scheme is updated to generate a target layout structure scheme.

[0179] In the embodiment of the application, under the constraint condition of the preset layout design rule and the preset evaluation index condition, the parameters in the parameter set are optimized and solved by the pipe bus layout model, the value range corresponding to the optimal solution is updated to update the layout structure scheme, the design of the pipe bus in the updated initial layout structure scheme is reasonably evaluated, and the design effect of the pipe bus in the initial layout structure scheme is evaluated, and the target layout structure scheme is obtained after the evaluation.

[0180] Further, step 210 includes the following steps:

[0181] S41, based on the constraint condition that the center distance between the tubular bus and the shell is not less than the preset safe clearance, optimizing the to-be-measured coordinate parameters of the first-phase tubular bus through the first-phase tubular bus layout model of the tubular bus layout model, and determining the equivalent parameters corresponding to the to-be-measured coordinate parameters of the first-phase tubular bus according to the first optimization result.

[0182] In the embodiment of the application, the first optimization result refers to the result obtained after the to-be-measured coordinate parameter z A1 of the A-phase bus is optimized.

[0183] The A-phase tubular bus needs to satisfy the safe clearance between the shell and the tubular bus ≥d. To satisfy the above requirement, it is only needed to ensure that the spatial distance from the shell boss point O to the plane A1A2A n is ≥d. Taking the safe clearance boundary value d as the optimization criterion, z A1 is optimally taken in relation to l, and the constraint condition is satisfied as follows:

[0184] .

[0185] Therefore, the optimization of the spatial layout of the A-phase tubular bus (the optimization of the to-be-measured coordinate parameters of the A-phase tubular bus by the first-phase tubular bus layout model) is only related to the value of the parameter l. To ensure that the load switch area / breaker area on the upper side of the tubular bus has sufficient safe clearance, the value of d n should be selected in the design, and 0 < d n < l < d n .

[0186] According to the first optimization result, the to-be-measured coordinate parameter z A1 of the A-phase tubular bus is optimally taken in relation to l, that is, the equivalent parameter is determined as l.

[0187] S42, based on the constraint condition that the corner of the polyline tubular bus is not less than the preset spatial angle and the polyline segment of the tubular bus is not less than the preset line segment length, optimizing the to-be-measured coordinate parameters of the second-phase tubular bus through the second-phase tubular bus layout model of the tubular bus layout model, and determining the equivalent parameters corresponding to the to-be-measured coordinate parameters of the second-phase tubular bus according to the second optimization result.

[0188] In the embodiment of the application, the second optimization result refers to the result obtained after the to-be-measured coordinate parameter z A1 of the B-phase bus is optimized.

[0189] The B-phase tubular bus needs to satisfy that the spatial angle of each polyline segment is ≥90°, that is, the line segment B1B2 needs to satisfy the spatial angle ≥90° with the line segment B2B n , and the parameter x B1 should be taken as x B1m is optimal (i.e. the line segment B1B2 is parallel to the YZ plane). The parameter z B1 The parameter z B1 may be calculated by the following relationship: z B .

[0190] Therefore, the optimization of the spatial layout of the B-phase busbar (i.e. the optimization of the to-be-measured coordinate parameters of the B-phase busbar by the second-phase busbar layout model) is only related to the value of the angle θ B . To satisfy the condition that the length of each line segment of the B-phase busbar is greater than or equal to m and that there is sufficient safety clearance between the segment C0C1 of the C-phase busbar, the value range of the angle θ B is set as:

[0191] ;

[0192] .

[0193] In summary, according to the second optimization result, the optimal value of the to-be-measured coordinate parameter z B1 of the B-phase busbar is related to the angle θ B , i.e. the equivalent parameter is the angle θ B .

[0194] S43, based on the constraint condition that the minimum distance between the line segment length and the second interpolation node of the second-phase busbar is not less than the preset safety clearance, the to-be-measured coordinate parameters of the third-phase busbar are optimized by the third-phase busbar layout model of the busbar layout model, and the equivalent parameter corresponding to the to-be-measured coordinate parameters of the third-phase busbar is determined according to the third optimization result.

[0195] In the embodiment of the application, the third optimization result refers to the result obtained after the to-be-measured coordinate parameter z A1 of the C-phase busbar is optimized.

[0196] The C-phase busbar needs to satisfy the condition that the minimum distance between C1C2 and the node B2 should be greater than or equal to d. To calculate the boundary minimum distance, the node C1 should satisfy the following requirements:

[0197] ;

[0198] ;

[0199] .

[0200] Based on the above constraint relationship, the optimization of the spatial layout of the C-phase busbar (i.e. the optimization of the to-be-measured coordinate parameters of the C-phase busbar by the third-phase busbar layout model) can be equivalent to the value of the parameter θ C .

[0201] If the coordinate value of node C1 is obtained, the minimum distance of node B1 to the line segment C1C2 needs to be checked to still satisfy ≥d, and the checking rule is as follows:

[0202] ;

[0203] If the calculation result does not meet the requirement, the coordinate value of node C2 is modified to C2(km, l+d n , 2d), k is a correction coefficient, and the value is ≥1.

[0204] According to the third optimization result, the to-be-measured coordinate parameters x C1 , z C1 of the C-phase bus are obtained. C , and the angle θ C is related to the optimal value of the equivalent parameter.

[0205] S44, based on the preset evaluation index condition, the equivalent parameters of the to-be-measured coordinate parameters corresponding to the first-phase bus, the second-phase bus and the third-phase bus are optimized and solved, the optimal value range of each equivalent parameter is determined according to the solving result, and the initial layout structure scheme is updated to generate an updated layout structure scheme.

[0206] In the embodiment of the application, the updated layout structure scheme refers to a new layout structure scheme obtained after the to-be-measured coordinate parameters in the initial layout structure scheme are optimized and solved.

[0207] Based on the modeling of the three-phase bus spatial layout in the foregoing steps S41-S43, the to-be-measured coordinate parameters of the bus layout are calculated and optimized. The parameters that need to be calculated in the process are l, θ B and θ C (i.e., the equivalent parameter l of the A-phase bus, the equivalent parameter θ B of the B-phase bus and the equivalent parameter θ C of the C-phase bus), a three-degree-of-freedom calculation grid of the three parameters l, θ B and θ C is established by using a meshgrid function (i.e., a grid matrix generation function), fast optimization calculation is performed, the initial layout structure scheme is updated according to the value range of the calculated parameters, and an updated layout structure scheme is generated.

[0208] S45, the bus in the updated layout structure scheme is sequentially designed and reasonably evaluated and designed and evaluated, and a target layout structure scheme is obtained according to the evaluation result.

[0209] In the embodiment of the application, the design rationality evaluation refers to a comprehensive and systematic analysis and judgment of the design scheme of the bus in the power system to determine whether it can meet various requirements of power transmission and distribution.

[0210] Design effect evaluation refers to a comprehensive and systematic evaluation of a design scheme of the tubular busbar applied in the power system to determine whether it meets the actual engineering requirements and related standard requirements.

[0211] In specific embodiments, referring to Figure 7 In the calculation and optimization process of the equivalent parameters of the tubular busbar layout in the layout structure scheme, the following indexes are used for the evaluation of the application effect under the satisfaction of the constraint rules proposed in the present application:

[0212] ;

[0213] ;

[0214] .

[0215] In the evaluation indexes, V is the space volume occupied by the equivalent calculation of the three-phase tubular busbar, which is used to evaluate the volume size of the space increased area, and the smaller the value is, the better it is, that is, the tubular busbar space increased area is relatively small; K is the number of grid nodes that meet the safety clearance, N1 is the number of nodes not in the safety clearance d of the three-phase tubular busbar, and N0 is the total number of generated three-degree-of-freedom calculation grids, and the larger the value of K is, the better it is under the satisfaction of the constraint conditions. In the process, the criterion whether a node (x, y, z) is in the safety clearance d of the line segment is as follows:

[0216] ;

[0217] ;

[0218] ;

[0219] (x i , y i , z i ), (x i+1 , y i+1 , z i+1 ) are two end points of a straight line segment, if the node (x, y, z) satisfies the above rules at the same time, it is determined that the node is in the clearance d area of the busbar segment, and it is excluded from the total number of nodes N0; after all the nodes in the safety clearance of the tubular busbar are excluded, the number of nodes N1 outside the safety clearance of the tubular busbar is obtained.

[0220] , , are the lengths of the three-phase tubular busbars, respectively. The minimum value result in the calculation process is represented.

[0221] After the rationality evaluation and design effect evaluation of the busbar in the updated layout structure scheme, a target layout structure scheme is obtained, and the target layout structure scheme has the following advantages:

[0222] 1) Each phase busbar interval area is clear, and the busbar scheme is easy to design; meanwhile, the scheme can realize the application design of three-fold line type busbars under different voltage levels, and is easy to apply in engineering.

[0223] 2) The spatial geometric layout of the three-phase busbar is simplified into a mathematical calculation of multiple parameters iterative solution, and the dimension of the calculation parameters is simplified through the calculation of the constraint conditions between the busbars, thereby reducing the workload of the optimization calculation, and the method is more suitable for engineering application.

[0224] 3) In terms of optimization design method, the corresponding busbar design rules are proposed in combination with the characteristics of the proposed busbar spatial layout scheme, and the models of the A-phase, B-phase and C-phase busbars are established, the calculation method is more simple and direct, and the geometric graphic method is more easy to optimize calculation and verify the effectiveness of the calculation results.

[0225] 4) The structure scheme is easy to realize miniaturization design, and can release a large number of safety clearance nodes; the double-sided lead structure scheme fully considers the layout, safety clearance and heat dissipation of the three-phase busbar; meanwhile, the structure scheme can meet the design of the three-fold line type structure scheme for the A-phase, B-phase and C-phase busbars, is easy to optimize the overall scheme of the busbar, reduces the electric field aggregation hidden danger, and is better adapted to the switch cabinet design of different voltage levels.

[0226] 5) The layout design of the three-phase busbar contains many nodes, and each node contains three coordinate information, the iterative optimization design of the multiple parameters has a large amount of calculation work, and is not easy to realize fast optimization application. The scheme adopts the boundary optimization method to simplify the dimension of the calculation parameters, proposes the optimization rules and fast calculation method, simplifies the optimization solving workload, has better efficiency, and is more targeted.

[0227] Please refer to Figure 8 , Figure 8 A structure block diagram of a double-sided lead type switch cabinet three-phase busbar structure optimization system provided for the third embodiment of the present application.

[0228] The virtual impedance control parameter optimization system provided by the present application comprises:

[0229] The construction module 801 is configured to construct an initial layout structure scheme of three-phase busbars according to preset layout design rules of the three-phase busbars of the switch cabinet.

[0230] The extraction module 802 is configured to determine node coordinates corresponding to nodes of each phase busbar in the initial layout structure scheme based on a preset coordinate system, and extract to-be-measured coordinate parameters of the node coordinates of each phase busbar.

[0231] The mapping module 803 is configured to map each phase busbar to a coordinate plane of the preset coordinate system to construct a busbar layout model.

[0232] The solving module 804 is configured to perform optimization and solving on each to-be-measured coordinate parameter through the busbar layout model based on constraint conditions of the preset layout design rules and preset evaluation index conditions, determine an optimal value range of each to-be-measured coordinate parameter according to a solving result, and update the initial layout structure scheme to generate a target layout structure scheme.

[0233] Further, the construction module 801 comprises:

[0234] The acquisition sub-module is configured to acquire preset layout design rules of three-phase busbars of a switch cabinet.

[0235] The layout sub-module is configured to determine an arrangement mode and a spatial layout of the three-phase busbars based on the preset layout design rules.

[0236] The node sub-module is configured to determine a start node, a first interpolation node, a second interpolation node and a terminal node of each phase busbar corresponding to the three-phase busbars according to the arrangement mode and the spatial layout of the three-phase busbars.

[0237] The first construction sub-module is configured to sequentially connect the start node, the first interpolation node, the second interpolation node and the terminal node of the first phase busbar to construct the first phase busbar.

[0238] The second construction sub-module is configured to sequentially connect the start node, the first interpolation node, the second interpolation node and the terminal node of the second phase busbar to construct the second phase busbar.

[0239] The third construction sub-module is configured to sequentially connect the start node, the first interpolation node, the second interpolation node and the terminal node of the third phase busbar to construct the third phase busbar.

[0240] The fourth construction sub-module is configured to construct the initial layout structure scheme of the three-phase busbars by using the first phase busbar, the second phase busbar and the third phase busbar based on the preset layout design rules.

[0241] Further, the extraction module 802 comprises:

[0242] The coordinate system submodule is configured to construct a preset coordinate system with the start node of the second phase busbar as an end point.

[0243] The node coordinate submodule is configured to determine the coordinates of the nodes of the phase busbars in the initial layout structure scheme in the preset coordinate system according to the preset three-phase conductor three-fold line layout and the preset safety clearance, and generate a plurality of node coordinates.

[0244] The line segment length submodule is configured to set the line segment length of the line segment between the second interpolation node and the terminal node of each phase busbar based on a preset busbar fold line segment design rule.

[0245] The updated coordinate submodule is configured to update the node coordinates of the second interpolation node according to the line segment length, and generate updated second interpolation node coordinates.

[0246] The coordinate parameter submodule is configured to extract the to-be-measured coordinate parameters corresponding to the first interpolation node coordinates and the updated second interpolation node coordinates of each phase busbar.

[0247] Further, the mapping module 803 comprises:

[0248] The first mapping submodule is configured to map the first phase busbar to the YZ plane of the preset coordinate system, and construct a first phase busbar layout model.

[0249] The second mapping submodule is configured to map the second phase busbar to the XZ plane and the YZ plane of the preset coordinate system, and construct a second phase busbar layout model.

[0250] The third mapping submodule is configured to map the third phase busbar to the XZ plane and the YZ plane of the preset coordinate system, and construct a third phase busbar layout model.

[0251] The busbar layout submodule is configured to construct a busbar layout model by using the first phase busbar layout model, the second phase busbar layout model, and the third phase busbar layout model.

[0252] Further, the constraint conditions of the preset layout design rule of the system specifically comprise:

[0253] The first setting submodule is configured to set the center distance between each busbar and the busbar, and between the busbar and the shell to be not less than the preset safety clearance according to the preset layout design rule.

[0254] The second setting submodule is configured to set the busbar fold line segment to be not less than the preset line segment length according to the preset layout design rule.

[0255] The third setting submodule is configured to set the corner of the fold line type busbar to be not less than the preset space angle according to the preset layout design rule.

[0256] The fourth setting sub-module is configured to obtain a length of a polyline segment between the first interpolation node and the second interpolation node of the third phase bus, and set a minimum distance between the length of the polyline segment and the second interpolation node of the second phase bus to be not less than a preset safe clearance according to a preset layout design rule;

[0257] The fifth setting sub-module is configured to set the outgoing direction of the start node of each phase bus to be a vertical plane, and the phase angle between the outgoing direction of the start node of the first phase bus and the vertical direction to be a first preset angle, the phase angle between the outgoing direction of the start node of the second phase bus and the vertical direction to be a second preset angle, and the phase angle between the outgoing direction of the start node of the third phase bus and the vertical direction to be a third preset angle according to the preset layout design rule.

[0258] The sixth setting sub-module is configured to set the outgoing direction of the terminal node of each phase bus to be a horizontal plane according to the preset layout design rule.

[0259] Further, the solving module 804 comprises:

[0260] The first equivalent parameter sub-module is configured to optimize the to-be-measured coordinate parameters of the first phase bus according to the first phase bus layout model of the busbar layout model based on the constraint condition that the center distance between the busbar and the shell is not less than a preset safe clearance, and determine the equivalent parameters corresponding to the to-be-measured coordinate parameters of the first phase bus according to the first optimization result.

[0261] The second equivalent parameter sub-module is configured to optimize the to-be-measured coordinate parameters of the second phase bus according to the second phase bus layout model of the busbar layout model based on the constraint condition that the corner of the polyline busbar is not less than a preset space angle and the busbar polyline segment is not less than a preset segment length, and determine the equivalent parameters corresponding to the to-be-measured coordinate parameters of the second phase bus according to the second optimization result.

[0262] The third equivalent parameter sub-module is configured to optimize the to-be-measured coordinate parameters of the third phase bus according to the third phase bus layout model of the busbar layout model based on the constraint condition that the minimum distance between the length of the polyline segment and the second interpolation node of the second phase bus is not less than a preset safe clearance, and determine the equivalent parameters corresponding to the to-be-measured coordinate parameters of the third phase bus according to the third optimization result.

[0263] The updated layout structure scheme sub-module is configured to optimize the equivalent parameters corresponding to the to-be-measured coordinate parameters of the first phase bus, the second phase bus and the third phase bus based on the preset evaluation index condition, determine the optimal value range of each equivalent parameter according to the solving result, and update the initial layout structure scheme to generate an updated layout structure scheme.

[0264] The target layout structure scheme sub-module is used for sequentially performing design rationality evaluation and design effect evaluation on bus bars in the updated layout structure scheme, and obtaining the target layout structure scheme according to the evaluation results.

[0265] The embodiment of the application provides a computer readable storage medium, which stores a computer program, and the computer program is executed to realize the three-phase busbar structure optimization method of the double-sided lead type switch cabinet according to any embodiment of the application.

[0266] The embodiment of the application provides a computer program product, which comprises a computer program stored on a non-transitory computer readable storage medium, and the computer program comprises program instructions, wherein, when the program instructions are executed by a computer, the computer executes the three-phase busbar structure optimization method of the double-sided lead type switch cabinet according to any embodiment of the application.

[0267] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0268] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0269] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiment scheme.

[0270] In addition, each functional unit in each embodiment of the application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0271] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application or the entire or part of the technical solutions that essentially contribute to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0272] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some technical features; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for optimizing the three-phase busbar structure of a double-sided lead-wire switchgear, characterized in that, include: According to the preset layout design rules of the three-phase busbar of the switchgear, the initial layout structure scheme of the three-phase busbar is constructed. The initial layout structure scheme of the three-phase busbar, constructed according to the preset layout design rules of the switchgear, includes: Obtain the preset layout design rules for the three-phase busbars of the switchgear; Based on the preset layout design rules, the arrangement and spatial layout of the three-phase busbars are determined; Based on the arrangement and spatial layout of the three-phase busbars, determine the starting node, first interpolation node, second interpolation node, and terminal node of each phase busbar corresponding to the three-phase busbars; The first phase busbar is constructed by sequentially connecting the starting node, the first interpolation node, the second interpolation node, and the terminal node. The second phase busbar is constructed by sequentially connecting the starting node, the first interpolation node, the second interpolation node, and the terminal node. The third phase busbar is constructed by sequentially connecting the starting node, the first interpolation node, the second interpolation node, and the terminal node. Based on the preset layout design rules, the initial layout structure of the three-phase busbar is constructed using the first phase busbar, the second phase busbar, and the third phase busbar. Based on a preset coordinate system, determine the node coordinates corresponding to the nodes of each phase busbar in the initial layout structure scheme, and extract the coordinate parameters to be measured for the node coordinates of each phase busbar. The process involves determining the node coordinates of each phase busbar in the initial layout structure based on a preset coordinate system, and extracting the coordinate parameters to be measured for each phase busbar node coordinate, including: A preset coordinate system is constructed with the starting node of the second phase busbar as the endpoint; Based on the preset three-phase conductor three-fold line layout and preset safety clearance, determine the coordinates of the nodes of each phase busbar in the initial layout structure scheme on the preset coordinate system, and generate multiple node coordinates; Based on the preset busbar segment design rules, the segment length between the second interpolation node and the terminal node of each phase busbar is set; Update the node coordinates of the second interpolation node according to the length of the line segment, and generate updated second interpolation node coordinates; Extract the coordinates of the first interpolation node of each phase busbar and update the coordinates of the second interpolation node corresponding to the coordinate parameters to be measured; Map each phase busbar to the coordinate plane of the preset coordinate system to construct a busbar layout model; The step of mapping each phase busbar to the coordinate plane of the preset coordinate system to construct the busbar layout model includes: The first phase busbar is mapped onto the YZ plane of the preset coordinate system to construct the layout model of the first phase busbar; The second phase busbar is mapped to the XZ plane and YZ plane of the preset coordinate system to construct the layout model of the second phase busbar; The third phase busbar is mapped to the XZ and YZ planes of the preset coordinate system to construct a layout model of the third phase busbar. A busbar layout model is constructed using the first phase busbar layout model, the second phase busbar layout model, and the third phase busbar layout model. Based on the constraints and evaluation index conditions of the preset layout design rules, the busbar layout model is used to optimize and solve each of the measured coordinate parameters. The optimal value range of each measured coordinate parameter is determined according to the solution results, and the initial layout structure scheme is updated to generate the target layout structure scheme. The constraints of the preset layout design rules specifically include: According to the preset layout design rules, the center distance between each busbar and between each busbar and the outer casing shall not be less than the preset safety clearance. Based on the constraints and preset evaluation index conditions of the preset layout design rules, the busbar layout model is used to optimize and solve for each of the measured coordinate parameters. The optimal value range of each measured coordinate parameter is determined based on the solution results, and the initial layout structure scheme is updated to generate the target layout structure scheme, including: Based on the constraint that the center distance between the first phase busbar and the outer casing is not less than the preset safety clearance, the measured coordinate parameters of the first phase busbar are optimized by the first phase busbar layout model of the busbar layout model, and the equivalent parameters corresponding to the measured coordinate parameters of the first phase busbar are determined according to the first optimization result. The first phase busbar must meet the requirement of a safe clearance between itself and the casing ≥ ; The constraint condition based on the center distance between the first phase busbar and the outer casing not being less than the preset safety clearance is specifically as follows: ； To ensure sufficient safety clearance for the load switch area and / or circuit breaker area above the first phase busbar, the design... , The coordinate parameters to be measured for the first phase busbar are: As the safety clearance boundary value, the distance between the terminal node of the second phase busbar and the starting node of the second phase busbar in the Y-axis direction of the YZ plane is: The distance between the starting node of the first phase busbar and the outer casing is The terminal nodes of the first phase busbar, the second phase busbar, and the third phase busbar are all located in the same plane as the starting node of the second phase busbar. The center-to-center distance between the terminal nodes of the first phase busbar, the second phase busbar, and the third phase busbar is [missing information]. .

2. The method for optimizing the three-phase busbar structure of a double-sided lead-wire switchgear according to claim 1, characterized in that, The constraints of the preset layout design rules also include: According to the preset layout design rules, the length of the busbar segment is set to be no less than the preset segment length; According to the preset layout design rules, the corner angle of the polygonal busbar is set to be no less than the preset spatial angle. Obtain the length of the broken line segment between the first interpolation node and the second interpolation node of the third phase busbar, and according to the preset layout design rules, set the minimum distance between the broken line segment of the third phase busbar and the second interpolation node of the second phase busbar to be no less than the preset safety clearance. According to the preset layout design rules, the lead-out direction of the starting node of each phase busbar is set to a vertical plane, and the phase angle between the lead-out direction of the starting node of the first phase busbar and the vertical direction is a first preset angle, the phase angle between the lead-out direction of the starting node of the second phase busbar and the vertical direction is a second preset angle, and the phase angle between the lead-out direction of the starting node of the third phase busbar and the vertical direction is a third preset angle. According to the preset layout design rules, the lead-out direction of the terminal nodes of each phase busbar is set to a horizontal plane.

3. The method for optimizing the three-phase busbar structure of a double-sided lead-wire switchgear according to claim 1, characterized in that, The process, based on the constraints and preset evaluation index conditions of the preset layout design rules, optimizes and solves for each of the measured coordinate parameters using the busbar layout model, determines the optimal value range of each measured coordinate parameter based on the solution results, updates the initial layout structure scheme, and generates the target layout structure scheme, further includes: Based on the constraints that the corner angle of the second phase busbar is not less than a preset spatial angle and the length of the broken line segment of the second phase busbar is not less than a preset line segment length, the measured coordinate parameters of the second phase busbar are optimized by the second phase busbar layout model of the busbar layout model, and the equivalent parameters corresponding to the measured coordinate parameters of the second phase busbar are determined according to the second optimization result. Based on the constraint that the minimum distance between the broken line segment of the third phase busbar and the second interpolation node of the second phase busbar is not less than the preset safety clearance, the measured coordinate parameters of the third phase busbar are optimized by the third phase busbar layout model of the busbar layout model, and the equivalent parameters corresponding to the measured coordinate parameters of the third phase busbar are determined according to the third optimization result. Based on preset evaluation index conditions, the equivalent parameters of the coordinate parameters to be measured corresponding to the first phase busbar, the second phase busbar and the third phase busbar are optimized and solved. The optimal value range of each equivalent parameter is determined according to the solution results, and the initial layout structure scheme is updated to generate an updated layout structure scheme. The design rationality and design effect of the busbars in the updated layout structure scheme are evaluated in sequence, and the target layout structure scheme is obtained based on the evaluation results.

4. A three-phase busbar structure optimization system for a double-sided lead-wire switchgear, characterized in that, The dual-lead-type switchgear three-phase busbar structure optimization system is used to implement the dual-lead-type switchgear three-phase busbar structure optimization method as described in any one of claims 1-3, wherein the dual-lead-type switchgear three-phase busbar structure optimization system includes: The construction module is used to construct the initial layout structure scheme of the three-phase busbar according to the preset layout design rules of the three-phase busbar of the switchgear; The extraction module is used to determine the node coordinates corresponding to the nodes of each phase busbar in the initial layout structure scheme based on a preset coordinate system, and to extract the coordinate parameters to be measured for the node coordinates of each phase busbar. The mapping module is used to map each phase busbar to the coordinate plane of the preset coordinate system to construct a busbar layout model. The solution module is used to optimize and solve each of the measured coordinate parameters based on the constraints and preset evaluation index conditions of the preset layout design rules through the bus layout model, determine the optimal value range of each of the measured coordinate parameters based on the solution results, update the initial layout structure scheme, and generate the target layout structure scheme.

5. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed, it implements the method for optimizing the three-phase busbar structure of a double-sided lead-wire switchgear as described in any one of claims 1-3.

6. A computer program product, characterized in that, The computer program product includes a computer program stored on a non-transitory computer-readable storage medium, the computer program including program instructions, wherein when the program instructions are executed by a computer, the computer performs the method for optimizing the three-phase busbar structure of a double-sided lead-type switchgear as described in any one of claims 1-3.

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