An intelligent generation method and system for a power supply scheme that meets the access requirements of medium-voltage users

Abstract

The present invention provides a method for intelligently generating a power supply scheme that meets the access requirements of medium-voltage users, including receiving the load application information newly added by users; according to the load application information, in a pre-set distribution network grid level model, determining the corresponding medium-voltage grid, and responding to the drawing operations of the outer red line and internal wiring of the user in the medium-voltage grid to obtain the user's power application grid and its corresponding grid status distribution network analysis information; according to the grid status distribution network analysis information, determining the superior power supply point, and combining the load application information, searching for multiple power supply paths, and further performing electrical calculation and verification on each power supply path to obtain a power supply path that meets the predetermined conditions. Implementing the present invention not only saves time and effort, but also ensures the accuracy of the power access point and the final line selection, so as to overcome the problems that the existing manual experience-based compilation and verification of power supply schemes are time-consuming and laborious and the effectiveness is difficult to guarantee.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid planning, and particularly to an intelligent generation method and system for a power supply plan that meets the access of medium-voltage users. Background Art

[0002] Currently, the old problems and new demands in the development of the distribution network are intertwined, resulting in increasingly complex planning problems. Therefore, there is an urgent need to use a brand-new planning concept to create an auxiliary decision-making tool for distribution network planning that adapts to the new situation.

[0003] However, for the existing power supply plan, it is necessary to export the current power grid data from the GIS system and use CAD tools to draw the internal wiring, power supply points, lines, etc. After the power supply plan is completed, it is also necessary to manually perform electrical calculation and verification. This makes the workload huge and time-consuming, and there are also problems such as the inability to real-time check the accuracy of the power supply relationship and the usability of the ring main unit, which is likely to cause errors in the selection of the power access point and manual verification errors, directly affecting the accuracy of the final line selection.

[0004] Therefore, it is urgent to develop an automatic power supply plan generation technology to change the pattern that the traditional manual experience-based preparation and verification of power supply plans are time-consuming, laborious, and difficult to guarantee the effectiveness, so as to promote the transformation of the power supply plan from the "manual preparation method" to the "intelligent generation mode" and promote the scientific development of the distribution network. Summary of the Invention

[0005] The technical problem to be solved by the embodiments of the present invention is to provide an intelligent generation method and system for a power supply plan that meets the access of medium-voltage users, which is not only time-saving and labor-saving, but also can ensure the accuracy of the power access point and the final line selection, so as to overcome the problems that the existing manual experience-based preparation and verification of power supply plans are time-consuming, laborious, and difficult to guarantee the effectiveness.

[0006] To solve the above technical problem, the embodiments of the present invention provide an intelligent generation method for a power supply plan that meets the access of medium-voltage users. The method includes the following steps:

[0007] Receive the newly added load application information of the user;

[0008] According to the load application information, in the pre-set distribution network grid level model, determine the medium-voltage grid corresponding to the load application information, and respond to the user's drawing operation of the peripheral red line and internal wiring in the medium-voltage grid to obtain the user's electricity application grid and its corresponding grid status distribution network analysis information;

[0009] Based on the grid status power distribution analysis information within the user's electricity application grid, determine the upstream power source point, and in combination with the load application information, search for multiple power supply paths, and further conduct electrical calculation checks on each power supply path to obtain a power supply path that meets the predetermined conditions.

[0010] Among them, the load application information includes load nature, application capacity, type of business expansion, business expansion period, user name, and application location.

[0011] Among them, the internal wiring is the connection line between various electrical equipment composed of the household connection point, cable, overhead line, and ring main unit.

[0012] Among them, the grid status power distribution analysis information includes the current wiring situation and the target wiring situation within the user's electricity application grid; among them,

[0013] The current wiring situation includes the first feeder group list, installed capacity, high-limit current value, maximum load, connection point location, and whether there is a spare corner; among them, the first feeder group list includes the current wiring, its existing ring main units, and newly built ring main units.

[0014] The target wiring situation includes the second feeder group list, installed capacity, and high-limit current value; among them, the second feeder group list includes the new target wiring from the substation and its newly built ring main units.

[0015] Among them, the steps of determining the upstream power source point based on the grid status power distribution analysis information within the user's electricity application grid specifically include:

[0016] Based on the grid status power distribution analysis information within the user's electricity application grid, determine the margin of the current wiring within the user's electricity application grid, the existing ring main units, and the presence of spare corners in the existing ring main units.

[0017] If there is a margin in the current wiring and there are existing ring main units with spare corners, obtain the first predetermined number of existing ring main units on the current wiring as the upstream power source point by calculating the shortest line distance;

[0018] If there is a margin in the current wiring and there are existing ring main units but no spare corners, let the current wiring build new ring main units, and obtain the second predetermined number of newly built ring main units on the current wiring as the upstream power source point by calculating the shortest line distance;

[0019] If there is no margin in the current wiring, let the substation new out the target wiring and build new ring main units, and further obtain the third predetermined number of newly built ring main units on the new out target wiring of the substation as the upstream power source point by calculating the shortest line distance.

[0020] Among them, the steps of combining the load application information, searching for multiple power supply paths, and further performing electrical calculation and verification on each power supply path to obtain a power supply path meeting predetermined conditions specifically include:

[0021] According to the load application information and the superior power supply points, in the pre-set electronic map, determine the user application position to each superior power supply point position, and traverse all paths from the user application position to each superior power supply point position;

[0022] Obtain the initial information of each road in the electronic map, and according to the initial information of each road, use the pre-set intelligent algorithm to search for the optimal path from the user application position to each superior power supply point position, and output each as a power supply path;

[0023] Perform electrical calculation and verification on each power supply path to obtain a power supply path with the minimum total investment and the highest power supply reliability ranking.

[0024] Among them, the initial information of each road includes street intersection node information, street section information, road excavation prohibited section information, and cable trench laying information.

[0025] Among them, the pre-set intelligent algorithm is the A* algorithm.

[0026] Among them, the electrical calculation and verification include power flow calculation and verification, short-circuit current calculation and verification, N-1 calculation and verification, and power supply reliability calculation and verification.

[0027] The embodiment of the present invention also provides a power supply scheme intelligent generation system for meeting medium-voltage user access, including;

[0028] A user application information receiving unit, used to receive the new load application information of the user;

[0029] A grid current distribution network analysis unit, used to determine the medium-voltage grid corresponding to the load application information in the pre-set distribution network grid level model according to the load application information, and respond to the drawing operation of the outer perimeter red line and internal wiring of the user in the medium-voltage grid to obtain the user electricity application grid and its corresponding grid current distribution network analysis information;

[0030] A power supply line intelligent generation unit, used to determine the superior power supply points according to the grid current distribution network analysis information in the user electricity application grid, combine the load application information, search for multiple power supply paths, and further perform electrical calculation and verification on each power supply path to obtain a power supply path meeting predetermined conditions.

[0031] Implementing the embodiment of the present invention has the following beneficial effects:

[0032] 1. The present invention locates the grid from the user's demand points to the recommended upper-level power supply points, and then to a series of complex tasks such as path planning and electrical calculation verification, realizing system automation processing and intelligent recommendation, changing the previous working mode that requires manual drawing and calculation, greatly improving work efficiency, not only saving time and effort, but also ensuring the accuracy of power access points and the final line selection.

[0033] 2. The present invention realizes the intelligent generation of power supply schemes by machines instead of humans, effectively getting rid of the constraints of requirements such as the experience of preparation personnel and the familiarity with the development of the substation network in the area, effectively improving the quality of power supply scheme preparation, thus overcoming the problems of time-consuming, laborious and difficult to guarantee the effectiveness of the existing manual experience-based preparation and verification of power supply schemes. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, obtaining other drawings without creative efforts still belongs to the scope of the present invention.

[0035] Figure 1 It is a flowchart of a method for intelligent generation of a power supply scheme that meets the access of medium-voltage users provided by an embodiment of the present invention.

[0036] Figure 2 It is a schematic structural diagram of a system for intelligent generation of a power supply scheme that meets the access of medium-voltage users provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings.

[0038] As Figure 1 shown, in an embodiment of the present invention, a method for intelligent generation of a power supply scheme that meets the access of medium-voltage users is proposed. The method includes the following steps:

[0039] Step S1: Receive the load application information newly added by the user.

[0040] Step S2: According to the load application information, in the pre-set distribution network grid hierarchy model, determine the medium-voltage grid corresponding to the load application information, and respond to the user's drawing operations of the outer red line and internal wiring in the medium-voltage grid to obtain the user's electricity application grid and its corresponding grid status distribution network analysis information.

[0041] Step S3: Determine the upstream power source point based on the grid status power distribution analysis information within the grid of the user's electricity application, and combine this load application information to search for multiple power supply paths. Further, perform electrical calculation and verification on each power supply path to obtain a power supply path meeting the predetermined conditions.

[0042] Specifically, before step S1, an electronic map of the entire city is pre-installed, and a power distribution grid hierarchy model of the entire city is pre-set.

[0043] Among them, the power distribution grid hierarchy model is established by stratifying according to voltage levels to achieve unified coordination of power distribution management at different voltage levels. The geographical boundaries and electrical wiring of each level of grid are independent of each other, and are geographically nested layer by layer, and physically form a standard wiring, forming a clear and unified power supply structure and management entity.

[0044] The power distribution grid hierarchy model includes high-voltage grids (L1), medium-voltage grids (L2), and low-voltage grids (L3); among them, the high-voltage grid (L1) is formed by 2 - 4 source substations, and the boundary refers to the area grid enclosed by several main roads or natural barriers. In principle, it should not exceed 100 square kilometers; the medium-voltage grid (L2) is directly and independently powered by several groups of standard wiring. Each L2-level grid is composed of several blocks geographically and is a power supply grid enclosed by municipal roads. The load development characteristics (load maturity, rapid development, or uncertain development) within each grid should be relatively close; the low-voltage grid (L3) is the power supply range of the low-voltage power distribution network composed of each distribution transformer substation area.

[0045] In step S1, the user logs in to the application interface to fill in information, so that the newly added load application information of the user can be received, and the user parameter configuration will also be received. Among them, the load application information includes but is not limited to load nature, application capacity, type of business expansion, business expansion period, user name, and application location; the user parameter configuration includes information such as converting the user's application capacity into an electricity load discount.

[0046] In step S2, first, according to this load application information, within the power distribution grid hierarchy model, the medium-voltage grid corresponding to this load application information will be automatically determined, that is, the L2 grid where the demand point is located is determined according to the location of the user's application demand point.

[0047] Secondly, within this medium-voltage grid, the user can perform operations on drawing the outer red line and internal wiring. At this time, a response will be made to the user's operation of drawing the outer red line and internal wiring within this medium-voltage grid to obtain the user's electricity application grid and its corresponding grid status power distribution analysis information.

[0048] Among them, the user's electricity application grid is the grid drawn by the user's red line and contains internal wiring. The internal wiring is the connection line between various electrical devices composed of the household connection point, cable, overhead line, and ring main unit;

[0049] Among them, the grid's current distribution network analysis information includes the current wiring situation and the target wiring situation within the user's electricity application grid. The current wiring situation includes the first feeder group list, installed capacity, high-limit current value, maximum load, connection point location, and whether there is a spare corner; the first feeder group list includes the current wiring, its existing ring main units, and newly built ring main units, etc.; the target wiring situation includes the second feeder group list, installed capacity, and high-limit current value; the second feeder group list includes the new target wiring from the substation and its newly built ring main units, etc.

[0050] It can be understood that the grid's current distribution network analysis information can be simplified, inherit the existing projects (including planning, feasibility study, next plan, under construction, and related grid framework) of this grid forward, and be located on the electronic map.

[0051] In step S3, first, based on the margin of the current wiring within the user's electricity application grid, its ring main unit, and the spare corner of the ring main unit, determine the situation to which each current wiring belongs. The specific analysis process is as follows:

[0052] Based on the grid's current distribution network analysis information within the user's electricity application grid, determine the margin of the current wiring, the existing ring main unit, and the existence of the spare corner in the existing ring main unit within the user's electricity application grid;

[0053] If the current wiring has a margin, and there is an existing ring main unit with a spare corner, calculate the shortest line distance to obtain the first predetermined number (such as 6) of existing ring main units on this current wiring as the superior power supply points;

[0054] If the current wiring has a margin, and there is an existing ring main unit but no spare corner, let a newly built ring main unit be added to the current wiring, and calculate the shortest line distance to obtain the second predetermined number (such as 4) of newly built ring main units on this current wiring as the superior power supply points;

[0055] If the current wiring has no margin, let the substation new out the target wiring and build a newly built ring main unit, and further calculate the shortest line distance to obtain the third predetermined number (such as 4) of newly built ring main units on the new out target wiring of this substation as the superior power supply points.

[0056] Secondly, based on the load application information and the superior power supply points, determine the user application location to each superior power supply point location in the above-mentioned electronic map, and traverse all the paths from the user application location to each superior power supply point location;

[0057] Obtain the initial information of each road in the electronic map, and based on the initial information of each road, use a preset intelligent algorithm (such as the A* algorithm) to search for the optimal path from the user's installation location to each upstream power point location, and output each as a power supply path; among them, the initial information of each road includes relevant information such as street intersection node information, street segment information, road excavation prohibited segment information, and cable trench laying information, etc.

[0058] Conduct electrical calculation and verification on each power supply path to obtain a power supply path with the minimum total investment and the highest power supply reliability ranking; among them, the electrical calculation and verification include power flow calculation and verification, short-circuit current calculation and verification, N-1 calculation and verification, and power supply reliability calculation and verification, etc.

[0059] In one embodiment, among all paths from the user's installation location to each upstream power point location, the optimal path is obtained by repeating the operation of the A* algorithm to select the optimal next node until reaching the target node; multiple paths close to the optimal solution can also be generated by using the A* algorithm by increasing the influence factor.

[0060] Conduct electrical calculation and verification on each power supply path by using power flow calculation and verification, short-circuit current calculation and verification, N-1 calculation and verification, and power supply reliability calculation and verification. Based on the output path after electrical calculation and verification, comprehensively consider the comprehensive cost, automatically calculate the engineering quantity, investment scale, key indicators (such as power supply reliability, etc.), and obtain the final power supply path according to certain rules (the minimum total investment and the highest power supply reliability).

[0061] As Figure 2 shown, in the embodiment of the present invention, a power supply scheme intelligent generation system for meeting medium-voltage user access is provided, including;

[0062] A user installation information receiving unit 110, configured to receive the load installation information newly added by the user;

[0063] A grid current distribution network analysis unit 120, configured to determine the medium-voltage grid corresponding to the load installation information in a preset distribution network grid level model according to the load installation information, and respond to the drawing operation of the outer red line and internal wiring of the user in the medium-voltage grid, so as to obtain the user's electricity installation grid and its corresponding grid current distribution network analysis information;

[0064] A power supply line intelligent generation unit 130, configured to determine the upstream power point according to the grid current distribution network analysis information in the user's electricity installation grid, and combine the load installation information to search for multiple power supply paths, and further conduct electrical calculation and verification on each power supply path to obtain a power supply path meeting the predetermined conditions.

[0065] Implementing the embodiments of the present invention has the following beneficial effects:

[0066] 1. From locating the grid based on user requirements to recommending the superior power supply point, then to planning the path and electrical calculation verification and other series of complex tasks, the present invention realizes the automated processing and intelligent recommendation of the system, changes the previous working mode that requires manual drawing and calculation, greatly improves the work efficiency, not only saves time and effort, but also ensures the accuracy of the power access point and the final line selection;

[0067] 2. The present invention realizes the intelligent generation of the power supply plan by machines instead of humans, effectively gets rid of the constraints of requirements such as the experience of the preparation personnel and the familiarity with the development of the regional grid framework, effectively improves the quality of the power supply plan preparation, and thus overcomes the problems that the existing manual experience-based preparation and verification of the power supply plan are time-consuming, laborious and difficult to guarantee the effectiveness.

[0068] It should be noted that in the above system embodiments, the included each unit is only divided according to the functional logic, but is not limited to the above division, as long as the corresponding function can be realized; in addition, the specific names of the functional units are only for the convenience of mutual distinction and do not limit the protection scope of the present invention.

[0069] Those of ordinary skill in the art can understand that all or part of the steps in implementing the above method embodiments can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium, such as ROM / RAM, disk, optical disc, etc.

[0070] The above-disclosed are only the preferred embodiments of the present invention, and of course cannot be used to limit the scope of the rights of the present invention. Therefore, the equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. An intelligent generation method for a power supply scheme to meet the access of medium - voltage users, characterized in that, the method includes the following steps: Receiving the load application information newly added by the user; According to the load application information, in the pre - set distribution network grid - level model, determining the medium - voltage grid corresponding to the load application information, and responding to the drawing operation of the outer red line and internal wiring of the user in the medium - voltage grid, so as to obtain the user's power application grid and the corresponding grid - current distribution network analysis information; According to the grid - current distribution network analysis information in the user's power application grid, determining the upper - level power source point, and combining the load application information, searching for multiple power supply paths, and further performing electrical calculation and verification on each power supply path to obtain a power supply path meeting the predetermined conditions; Among them, the step of determining the upper - level power source point according to the grid - current distribution network analysis information in the user's power application grid specifically includes: According to the grid - current distribution network analysis information in the user's power application grid, determining the current wiring margin, existing ring main units, and the existence of spare angles in the existing ring main units in the user's power application grid; If there is a margin in the current wiring and there are existing ring main units with spare angles, by calculating the shortest line distance, obtaining the first predetermined number of existing ring main units on the current wiring as the upper - level power source points; If there is a margin in the current wiring and there are existing ring main units without spare angles, building new ring main units on the current wiring, and by calculating the shortest line distance, obtaining the second predetermined number of new ring main units on the current wiring as the upper - level power source points; If there is no margin in the current wiring, making the substation newly output a target wiring and building new ring main units, and further by calculating the shortest line distance, obtaining the third predetermined number of new ring main units on the substation's newly output target wiring as the upper - level power source points; Among them, the grid - current distribution network analysis information includes the current wiring situation and the target wiring situation in the user's power application grid; the current wiring situation includes the first feeder group list, installed capacity, high - limit current value, maximum load, connection point position, and whether there are spare angles; among them, the first feeder group list includes the current wiring, its existing ring main units, and new ring main units; the target wiring situation includes the second feeder group list, installed capacity, and high - limit current value; among them, the second feeder group list includes the substation's newly output target wiring and its new ring main units.

2. The intelligent generation method for a power supply scheme to meet the access of medium - voltage users according to claim 1, characterized in that, the load application information includes load nature, application capacity, type of business expansion, business expansion period, user name, and application location.

3. The intelligent generation method for a power supply scheme to meet the access of medium - voltage users according to claim 1, characterized in that, the internal wiring is the connection line between various electrical devices composed of an access connection point, cables, overhead lines, and ring main units.

4. The intelligent generation method for a power supply scheme to meet the access of medium - voltage users according to claim 1, characterized in that, The steps of combining the load application information to search for multiple power supply paths and further performing electrical calculation and verification on each power supply path to obtain a power supply path meeting the predetermined conditions specifically include: According to the load application information and the superior power supply points, in the pre-set electronic map, determine the user application position to each superior power supply point position, and traverse all paths from the user application position to each superior power supply point position; Obtain the initial information of each road in the electronic map, and according to the initial information of each road, use a pre-set intelligent algorithm to search for the optimal path from the user application position to each superior power supply point position, and output each as a power supply path; Perform electrical calculation and verification on each power supply path to obtain a power supply path with the minimum total investment and the highest power supply reliability ranking.

5. The intelligent generation method of the power supply scheme for satisfying medium-voltage user access as described in claim 4, characterized in that, The initial information of each road includes street intersection node information, street section information, non-excavation section information, and cable trench laying information.

6. The intelligent generation method of the power supply scheme for satisfying medium-voltage user access as described in claim 4, characterized in that, The pre-set intelligent algorithm is the A* algorithm.

7. The intelligent generation method of the power supply scheme for satisfying medium-voltage user access as described in claim 4, characterized in that, The electrical calculation and verification include power flow calculation and verification, short-circuit current calculation and verification, N-1 calculation and verification, and power supply reliability calculation and verification.

8. An intelligent generation system of the power supply scheme for satisfying medium-voltage user access, characterized in that, including; A user application information receiving unit for receiving the new load application information of the user; A grid current distribution network analysis unit for determining the medium-voltage grid corresponding to the load application information in the pre-set distribution network grid level model according to the load application information, and responding to the user's drawing operations of the peripheral red line and internal wiring in the medium-voltage grid to obtain the user's power application grid and its corresponding grid current distribution network analysis information; A power supply line intelligent generation unit for determining the superior power supply points according to the grid current distribution network analysis information in the user's power application grid, combining the load application information, searching for multiple power supply paths, and further performing electrical calculation and verification on each power supply path to obtain a power supply path meeting the predetermined conditions; The power supply line intelligent generation unit includes: A superior power supply point determination module for determining the superior power supply points according to the grid current distribution network analysis information in the user's power application grid; Among them, the superior power supply point determination module includes: A first superior power supply point determination sub-module for determining the current wiring margin, existing ring main units, and the existence of spare corners in the existing ring main units in the user's power application grid according to the grid current distribution network analysis information in the user's power application grid; The second upper power supply point determination sub-module is used to, when there is margin in the current wiring and there are existing ring main units with spare corners, obtain a first predetermined number of existing ring main units on the current wiring as the upper power supply points by calculating the shortest line distance; The third upper power supply point determination sub-module is used to, when there is margin in the current wiring and there are existing ring main units but without spare corners, build new ring main units on the current wiring and obtain a second predetermined number of newly built ring main units on the current wiring as the upper power supply points by calculating the shortest line distance; When there is no margin in the current wiring, let the substation newly draw a target wiring and build new ring main units, and further obtain a third predetermined number of newly built ring main units on the target wiring newly drawn by the substation as the upper power supply points by calculating the shortest line distance; Among them, the grid current distribution network analysis information includes the current wiring situation and the target wiring situation within the user electricity application grid; the current wiring situation includes the first feeder group list, the connected capacity, the high-limit current value, the maximum load, the connection point position and whether there is a spare corner; among them, the first feeder group list includes the current wiring and its existing ring main units and newly built ring main units; the target wiring situation includes the second feeder group list, the connected capacity and the high-limit current value; among them, the second feeder group list includes the target wiring newly drawn by the substation and its newly built ring main units.

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