35kV transformer substation design method suitable for distribution network users

Abstract

The invention discloses a 35kV transformer substation design method suitable for distribution network users. The method comprises the steps of forming a corresponding electrical scale and a wiring diagram according to an influence factor set of substation design; determining the type selection of electrical equipment of the transformer substation; determining the arrangement condition of prefabricated unit cabins of electrical equipment of the transformer substation; in combination with operation and maintenance requirements, land use conditions, surrounding environments, electrical scales and wiring diagrams of distribution network users and the number and arrangement conditions of the prefabricated unit cabins, a layout scheme for building the transformer substation by the prefabricated unit cabins is called; checking whether the obtained layout scheme meets the application condition and the application range of substation construction or not; and parameterizing the checked layout scheme meeting the application condition and the application range, then carrying out three-dimensional modeling, and outputting a final station building scheme model. According to the invention, the station establishment scheme can be quickly fed back to distribution network users.

Description

Technical Field

[0001] The invention belongs to the technical field of power transmission and transformation, and specifically relates to a 35kV substation design method suitable for distribution network users. Background Art

[0002] Driven by the power reform policy, distribution network users have increasingly urgent demands for electricity and higher requirements for power supply quality. In recent years, considering the reliability and convenience requirements in operation and maintenance, more and more corporate users have chosen to build 35kV substations on their own. In urban distribution networks, 35kV substations are more widely used and are closer to residents.

[0003] Existing distribution network users design 35kV substations mainly by relying on professional design consulting companies for engineering design. The design process takes a long time and the workload on site is heavy. The substation’s appearance is difficult to integrate with the surrounding environment, which is not conducive to the beautification of the urban environment. It is also difficult to quickly come up with a suitable station construction plan to match the station construction needs of ordinary distribution network users. Summary of the invention

[0004] In order to overcome the defects and shortcomings of the prior art, the purpose of the present invention is to provide a 35kV substation design method suitable for distribution network users, so as to facilitate rapid feedback of station construction plans to distribution network users.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A 35kV substation design method applicable to distribution network users is implemented in substation design software of a computer device, comprising the following steps: S1. According to the influencing factors of substation design, form the corresponding electrical scale and wiring diagram; S2. Determine the type of electrical equipment for the substation; S3. Determine the layout of the prefabricated unit cabins of the electrical equipment of the substation; S4. Combine the operation and maintenance requirements, land use conditions, surrounding environment, electrical scale and wiring diagram of the distribution network users, as well as the number and layout of the prefabricated unit cabins, and call the prefabricated unit cabins to build the substation layout plan; S5. Check whether the obtained layout plan meets the applicable conditions and scope of substation construction; S6. Parameterize the layout plan that meets the applicable conditions and scope of application after inspection, and then perform three-dimensional modeling to output the final site construction plan model.

[0006] Preferably, the set of influencing factors includes regional load level, load size, transportation conditions, land conditions, natural conditions of the site, and short-circuit level.

[0007] Furthermore, the arranging of the prefabricated unit cabin includes determining whether the prefabricated unit cabin and the main transformer are arranged outdoors respectively.

[0008] Furthermore, the prefabricated unit cabin at least includes a main transformer cabin, a switch cabinet cabin, a station transformer cabin, a grounding transformer cabin, and a secondary equipment cabin.

[0009] Furthermore, the layout plan of calling the prefabricated unit cabin to build the substation includes the following specific steps: S41. Determine the splicing principle between multiple prefabricated unit cabins; S42, splicing multiple prefabricated unit cabins from bottom to top according to the splicing principle; "Unit level" refers to the prefabricated unit cabin corresponding to a single electrical equipment, "functional level" refers to the functional module composed of multiple prefabricated unit cabins of the same functional level, and "whole station level" refers to the layout plan formed by combining multiple functional modules.

[0010] Furthermore, the splicing principle is as follows: (1) Arrange the main transformer compartment and the switchgear compartment adjacent to each other on the ground; (2) At least two side walls of the switchgear compartment shall be left unsealed to serve as operation and maintenance passages; (3) The secondary equipment compartment and grounding transformer compartment are arranged on the second floor of the switchgear compartment, so that the secondary equipment compartment and grounding transformer compartment no longer occupy the ground for arrangement; (4) At the edge of the cabin of other prefabricated unit cabins, a notch is set to match the prefabricated unit cabins with smaller volumes, such as the station cabin, so that the prefabricated unit cabins with smaller volumes, such as the station cabin, can be assembled into a rectangular parallelepiped with the other prefabricated unit cabins.

[0011] Furthermore, the splicing of the multiple prefabricated unit cabins from bottom to top is carried out according to the splicing principle, in the order of "unit level", "function level" and "whole station level", wherein: The “unit level” is based on prefabricated unit cabins; The “functional level” is based on the functional hierarchy of the substation; "Whole-station level" means splicing each functional level under the splicing principle.

[0012] Compared with the prior art, the present invention has the following advantages and beneficial effects: Compared with the shortcomings of the conventional design process in the prior art, which is time-consuming, has a large workload on site, and is difficult to quickly provide a suitable station construction plan to match ordinary distribution network users, the present invention organically combines the standard design of the power grid with the prefabricated unit cabin, so that the construction scale and electrical wiring of the distribution station match the standard design of the power grid, and the layout of the station construction plan utilizes the modular characteristics of the prefabricated unit cabin to quickly form a design plan for distribution network users. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall process of the 35kV substation design method applicable to distribution network users of the present invention. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0015] It should be noted that the directions or positional relationships indicated by terms such as “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present disclosure and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present disclosure.

[0016] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance. Similarly, words such as "one", "an", or "the" do not indicate a quantitative limitation, but rather indicate the presence of at least one. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "electrically connected" or "connected" and the like are not limited to physical or mechanical electrical connections, but may include electrical connections, whether direct or indirect. Example

[0017] like Figure 1 As shown, this embodiment provides a 35kV substation design method suitable for distribution network users, which is executed by substation design software in a computer device, including the following steps: S1. According to the influencing factors of substation design, form the corresponding electrical scale and wiring diagram; S2. Determine the type of electrical equipment for the substation; When selecting electrical equipment, it is necessary to determine the requirements for equipment creepage distance based on the natural conditions of the site and the short-circuit level, and consider whether to use gas-insulated or air-insulated equipment; S3. Determine the layout of the prefabricated unit cabins of the electrical equipment of the substation; To arrange the prefabricated unit cabin, it is necessary to determine whether the prefabricated unit cabin and the main transformer should be arranged outdoors, based on the land conditions, surrounding environment, electrical scale and equipment selection results; electrical scale refers to the number of corresponding electrical equipment; The prefabricated unit cabin at least includes the main transformer cabin, switchgear cabin, station transformer cabin, grounding transformer cabin, and secondary equipment cabin; S4. Combined with the operation and maintenance requirements, land use conditions, surrounding environment, electrical scale and wiring diagram of the distribution network users, as well as the number and layout of prefabricated unit cabins, the layout plan of the substation constructed by using prefabricated unit cabins is called; the specific steps include: S41. Determine the splicing principle between multiple prefabricated unit cabins; The splicing principles are as follows: (1) Arrange the main transformer compartment and the switchgear compartment adjacent to each other on the ground; (2) At least two side walls of the switchgear compartment shall be left unsealed to serve as operation and maintenance passages; (3) The secondary equipment compartment and grounding transformer compartment are arranged on the second floor of the switchgear compartment, so that the secondary equipment compartment and grounding transformer compartment no longer occupy the ground for arrangement; (4) A notch is provided at the edge of the cabin of other prefabricated unit cabins to match the prefabricated unit cabins with smaller volumes, such as the station cabin, so that the prefabricated unit cabins with smaller volumes, such as the station cabin, can be assembled into a rectangular parallelepiped with other prefabricated unit cabins; S42, in the order of "unit level", "function level" and "whole station level", multiple prefabricated unit cabins are spliced ​​from bottom to top according to the splicing principle; "Unit level" refers to the prefabricated unit cabin corresponding to a single electrical equipment, "functional level" refers to the functional module composed of multiple prefabricated unit cabins of the same functional level, and "whole station level" refers to the layout plan formed by combining multiple functional modules; In this embodiment, preferably, at the "unit level": (a) The electrical equipment of the main transformer compartment shall be a 35 kV 10000 kVA oil-immersed transformer with a noise level of no more than 65 dB during operation. The structure of the main transformer compartment may be a split semi-enclosed main transformer compartment and / or an integrated grid main transformer compartment. (b) According to the operation and maintenance requirements, the 35kV switchgear compartment shall adopt vacuum cabinets and / or gas-filled cabinets, arranged in a single row and spliced ​​at the long side of the compartment; (c) The 10kV switchgear compartment adopts a vacuum cabinet according to the operation and maintenance requirements. Usually, a center-mounted removable vacuum switchgear is selected, which is arranged in double rows and spliced ​​at the long side of the compartment; In this embodiment, in the "functional level" splicing, it is divided into five levels according to the functional level: main transformer module, 35kV distribution module, 10kV distribution module, station transformer and grounding transformer module, and secondary equipment module: (d) The main transformer module is formed by splicing together multiple main transformer compartments with the same electrical parameters side by side; (e) The 35kV distribution module is composed of multiple 35kV switchgear compartments. The electrical scale of each 35kV switchgear compartment can be the same or different. In addition to arranging electrical equipment, the 35kV distribution module has an operation and maintenance channel; (f) The 10kV distribution module is composed of multiple 10kV switchgear compartments. The electrical scale of each 10kV switchgear compartment can be the same or different. In addition to arranging electrical equipment, the 10kV distribution module has an operation and maintenance channel; In the "whole station level" splicing, it is necessary to intensively splice the modules of each functional level, and the splicing method also adopts the splicing principle of prefabricated unit cabins; S5, checking whether the layout plan obtained in step S4 meets the applicable conditions and scope of substation construction; During the inspection, it is also necessary to check whether the splicing between all prefabricated unit cabins meets the splicing principles in combination with the operation and maintenance requirements of the distribution network users; S6. Parameterize the layout plan that meets the applicable conditions and applicable scope checked in step S5, and then perform three-dimensional modeling to output the final site construction plan model.

[0018] Compared with the prior art, this embodiment has the following beneficial effects: Compared with the shortcomings of the conventional design process in the prior art, which is time-consuming, has a large workload on site, and is difficult to quickly provide a suitable station construction plan to match ordinary distribution network users, this embodiment organically combines the grid standard design with the prefabricated unit cabin, so that the construction scale and electrical wiring of the distribution station match the grid standard design, and the layout of the station construction plan utilizes the modular characteristics of the prefabricated unit cabin to quickly form a design plan for distribution network users.

[0019] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A 35kV substation design method suitable for distribution network users, executed in a substation design software of a computer device, characterized in that: The steps include: S1. According to the influencing factors of substation design, form the corresponding electrical scale and wiring diagram; S2. Determine the type of electrical equipment for the substation; S3. Determine the layout of the prefabricated unit cabins of the electrical equipment of the substation; S4. Combine the operation and maintenance requirements, land use conditions, surrounding environment, electrical scale and wiring diagram of the distribution network users, as well as the number and layout of the prefabricated unit cabins, and call the prefabricated unit cabins to build the substation layout plan; S5. Check whether the obtained layout plan meets the applicable conditions and scope of substation construction; S6. Parameterize the layout plan that meets the applicable conditions and scope of application after inspection, and then perform three-dimensional modeling to output the final site construction plan model.

2. The 35kV substation design method suitable for distribution network users according to claim 1 is characterized in that: The set of influencing factors includes regional load level, load size, transportation conditions, land conditions, natural conditions of the site, and short-circuit level.

3. The 35kV substation design method suitable for distribution network users according to claim 2 is characterized in that: The arranging of the prefabricated unit cabin includes determining whether the prefabricated unit cabin and the main transformer are arranged outdoors respectively.

4. The 35kV substation design method suitable for distribution network users according to claim 3 is characterized in that: The prefabricated unit cabin at least includes a main transformer cabin, a switch cabinet cabin, a station transformer cabin, a grounding transformer cabin, and a secondary equipment cabin.

5. The 35kV substation design method applicable to distribution network users according to claim 4 is characterized in that: The layout plan of calling the prefabricated unit cabin to build the substation includes the following specific steps: S41. Determine the splicing principle between multiple prefabricated unit cabins; S42, splicing multiple prefabricated unit cabins from bottom to top according to the splicing principle; "Unit level" refers to the prefabricated unit cabin corresponding to a single electrical equipment, "functional level" refers to the functional module composed of multiple prefabricated unit cabins of the same functional level, and "whole station level" refers to the layout plan formed by combining multiple functional modules.

6. The 35kV substation design method applicable to distribution network users according to claim 5 is characterized in that: The splicing principles are as follows: (1) Arrange the main transformer compartment and the switchgear compartment adjacent to each other on the ground; (2) At least two side walls of the switchgear compartment shall be left unsealed to serve as operation and maintenance passages; (3) The secondary equipment compartment and grounding transformer compartment are arranged on the second floor of the switchgear compartment, so that the secondary equipment compartment and grounding transformer compartment no longer occupy the ground for arrangement; (4) At the edge of the cabin of other prefabricated unit cabins, a notch is set to match the prefabricated unit cabins with smaller volumes, such as the station cabin, so that the prefabricated unit cabins with smaller volumes, such as the station cabin, can be assembled into a rectangular parallelepiped with the other prefabricated unit cabins.

7. The 35kV substation design method applicable to distribution network users according to claim 6 is characterized in that: The above-mentioned splicing of multiple prefabricated unit cabins from bottom to top is carried out according to the splicing principle, in the order of "unit level", "function level" and "whole station level", wherein: "Unit level" is based on prefabricated unit cabins; "Functional level" is based on the functional hierarchy of the substation; "Whole-station level" means splicing each functional level under the splicing principle.

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