Position selection method and system for offshore substation, electronic device, and storage medium

Abstract

The present application provides a position selection method and system for an offshore substation, an electronic device, and a storage medium. The method comprises: acquiring the coordinates of each wind turbine in an offshore wind farm; determining an initial position of a substation on the basis of the coordinates of all the wind turbines, wherein the initial position comprises first-axis position coordinates and second-axis position coordinates; performing disturbance on the first-axis position coordinates and determining the next disturbance direction of the first-axis position coordinates on the basis of the change of a submarine cable cost; performing disturbance on the second-axis position coordinates and determining the next disturbance direction of the second-axis position coordinates on the basis of the change of the submarine cable cost; and on the basis of the finally determined first-axis position coordinates and second-axis position coordinates after disturbance, determining an optimal position of the offshore substation corresponding to a current submarine cable topological connection mode of the offshore wind farm. The present application provides, by means of position disturbance, an optimal substation position selection method by considering regional constraints of an offshore substation.

Description

Offshore substation location selection method, system, electronic device and storage medium TECHNICAL FIELD

[0001] The application belongs to the technical field of substation design, and relates to a location selection method, in particular to an offshore substation location selection method, system, electronic device and storage medium. BACKGROUND

[0002] With the gradual development of offshore wind power towards the deep sea, the distance from the shore to the offshore substation (such as a booster station or a converter station) is increasing, and at the same time, the unit installed capacity of the offshore wind farm is also increasing, which puts higher requirements on the medium and high voltage AC / DC submarine cable, and thus the unit submarine cable price is also increasing. The location of the offshore booster station or the converter station directly affects the total procurement length of the submarine cable of the internal power collection line of the offshore wind farm and the high voltage AC / DC submarine cable connected to the shore, thereby affecting the overall investment cost of the offshore wind farm. The submarine cable cost generally accounts for 20-30% of the overall cost, and a reasonable location of the offshore booster station or the converter station can directly reduce the total cost of the submarine cable, thereby reducing the overall cost of the offshore wind farm in the planning and design stage and shortening the project investment return period.

[0003] SUMMARY

[0004] The application aims to provide an offshore substation location selection method, system, electronic device and storage medium, which can solve the problem of how to more reasonably design the location of the offshore wind farm substation and thereby reduce the total cost of the submarine cable.

[0005] The first aspect of the embodiment of the application provides an offshore substation location selection method, which comprises the following steps: obtaining the coordinates of each wind turbine in an offshore wind farm; determining an initial position of a substation according to the coordinates of all wind turbines; the initial position comprises a first axis position coordinate and a second axis position coordinate; perturbing the first axis position coordinate, determining the submarine cable cost corresponding to the current submarine cable topology connection mode of the offshore wind farm according to the perturbed coordinate; determining the perturbation direction of the first axis position coordinate in the next time according to the change of the submarine cable cost, and performing perturbation and cost analysis successively until the perturbed first axis position coordinate meets a first perturbation condition, and the perturbation of the first axis position coordinate is stopped; perturbing the second axis position coordinate, determining the submarine cable cost corresponding to the submarine cable topology connection mode of the offshore wind farm according to the perturbed coordinate; determining the perturbation direction of the second axis position coordinate in the next time according to the change of the submarine cable cost, and performing perturbation and cost analysis successively until the perturbed second axis position coordinate meets a second perturbation condition, and the perturbation of the second axis position coordinate is stopped; determining the optimal position of the offshore substation corresponding to the current submarine cable topology connection mode of the offshore wind farm according to the finally determined first axis position coordinate and the second axis position coordinate after perturbation.

[0006] In an implementation form of the first aspect, the step of determining the initial position of the substation according to the coordinates of all wind turbines comprises: obtaining a sum of X-axis coordinates and a sum of Y-axis coordinates of all wind turbines in the offshore wind farm; dividing the sum of X-axis coordinates by the total number of wind turbines to determine the X-axis calculated coordinate, and dividing the sum of Y-axis coordinates by the total number of wind turbines to determine the Y-axis calculated coordinate; determining the initial position of the substation according to the X-axis calculated coordinate and the Y-axis calculated coordinate.

[0007] In an implementation form of the first aspect, the step of determining the initial position of the substation according to the X-axis calculated coordinate and the Y-axis calculated coordinate comprises: determining an initial analysis point according to the X-axis calculated coordinate and the Y-axis calculated coordinate; in response to the initial analysis point not being in the sea area constraint region, taking the coordinate of the initial analysis point as the initial position of the substation; in response to the initial analysis point being in the sea area constraint region, taking a position on the boundary of the sea area constraint region closest to the initial analysis point as the initial position of the substation.

[0008] In an implementation form of the first aspect, after the step of determining the initial position of the substation according to the coordinates of all wind turbines, and before the step of determining the disturbance direction of the first axis position coordinate next time according to the change of the cable cost, the method further comprises: determining an initial cable cost before disturbance according to the initial position of the substation and the current cable topology connection mode of the offshore wind farm; the initial cable cost is used for comparison with the cable cost determined after the first disturbance of the first axis position coordinate to determine the change of the cable cost.

[0009] In an implementation form of the first aspect, the first axis position coordinate is an X position coordinate; the step of determining the disturbance direction of the first axis position coordinate next time according to the change of the cable cost comprises: in response to the cable cost becoming lower after the current disturbance of increasing the X position coordinate by a first preset distance, determining the disturbance direction next time as continuing to increase the distance of the X position coordinate; in response to the cable cost becoming higher after the current disturbance of increasing the X position coordinate by the first preset distance, determining the disturbance direction next time as reducing the X position coordinate by the first preset distance.

[0010] In an implementation form of the first aspect, the second axis position coordinate is a Y position coordinate; the step of determining the disturbance direction of the second axis position coordinate next time according to the change of the cable cost comprises: in response to that the cable cost becomes lower when the current disturbance is increasing the Y position coordinate by a second preset distance, determining that the disturbance direction of the second axis position coordinate next time is to continue increasing the Y position coordinate by the second preset distance; in response to that the cable cost becomes higher when the current disturbance is increasing the Y position coordinate by the second preset distance, determining that the disturbance direction of the second axis position coordinate next time is to decrease the Y position coordinate by the second preset distance.

[0011] In an implementation form of the first aspect, the method further comprises: in the process of disturbing the first axis position coordinate or the second position coordinate, in response to that the first axis position coordinate or the second position coordinate after the disturbance enters a sea area constraint region, exiting the sea area constraint region according to the disturbance direction and the disturbance distance this time.

[0012] The second aspect of the embodiments of the present application provides a position selection system of an offshore substation, the system comprising: a data module configured to store a current cable topology connection mode of an offshore wind farm, coordinates of wind turbines, a cable type and a cable price; a position selection module configured to perform the following steps: obtaining coordinates of each wind turbine in the offshore wind farm; determining an initial position of the substation according to the coordinates of all the wind turbines; the initial position comprising a first axis position coordinate and a second axis position coordinate; disturbing the first axis position coordinate, and determining a cable cost corresponding to the current cable topology connection mode of the offshore wind farm according to the coordinates after the disturbance in combination with the cable type and the cable price; determining a disturbance direction of the first axis position coordinate next time according to the change of the cable cost, and performing disturbance and cost analysis successively until the first axis position coordinate after the disturbance satisfies a first disturbance condition, and stopping the disturbance of the first axis position coordinate; disturbing the second axis position coordinate, and determining a cable cost corresponding to the cable topology connection mode of the offshore wind farm according to the coordinates after the disturbance in combination with the cable type and the cable price; determining a disturbance direction of the second axis position coordinate next time according to the change of the cable cost, and performing disturbance and cost analysis successively until the second axis position coordinate after the disturbance satisfies a second disturbance condition, and stopping the disturbance of the second axis position coordinate; determining an optimal position of the offshore substation corresponding to the current cable topology connection mode of the offshore wind farm according to the first axis position coordinate and the second axis position coordinate finally determined after the disturbance.

[0013] The third aspect of the embodiments of the present application provides an electronic device, comprising: a processor and a memory; the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the electronic device executes the method.

[0014] The fourth aspect of the embodiment of the present application provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the method.

[0015] As described above, the offshore substation position selection method, system, electronic device and storage medium provided by the present application have the following beneficial effects:

[0016] The present application provides a position optimization method considering the regional constraints of offshore substations (including booster stations or converter stations), which initializes the position of the offshore substation through the coordinates of the wind turbines determined by the offshore wind farm, then disturbs the position coordinates of the offshore substation, calculates the total cable procurement cost corresponding to the disturbed coordinates, and stops iteration until the new coordinates of the offshore substation after disturbance are all less economical than the coordinates before disturbance by comparing the position coordinates with more economical ones, thereby quickly obtaining the optimal position coordinates of the offshore booster station or converter station. Further, the present application also considers the sea area constraints, and can optimize the position of the offshore substation under various different shape regional constraint conditions. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 shows the application scenario of the offshore substation position selection method according to the embodiment of the present application.

[0018] Figure 2 shows the principle flowchart of the offshore substation position selection method according to the embodiment of the present application.

[0019] Figure 3 shows the position initialization diagram of the offshore substation position selection method according to the embodiment of the present application.

[0020] Figure 4 shows the position optimization flowchart of the offshore substation position selection method according to the embodiment of the present application.

[0021] Figure 5 shows the position optimization diagram of the offshore substation position selection method according to the embodiment of the present application.

[0022] Figure 6 shows the structural principle diagram of the offshore substation position selection system according to the embodiment of the present application.

[0023] Figure 7 shows the structural connection diagram of the electronic device according to the embodiment of the present application.

[0024] Element number explanation

[0025] 6 offshore substation position selection system

[0026] 61 data module

[0027] 62 position selection module

[0028] 7 Electronic device

[0029] 71 Processor

[0030] 72 Memory

[0031] 73 Communication interface

[0032] 74 System bus

[0033] S21-S27 Steps DETAILED DESCRIPTION

[0034] The present application will be described in detail below with specific embodiments. Other advantages and effects of the present application can be easily understood by those skilled in the art from the disclosure of the specification. The present application can also be implemented or applied in other different specific embodiments, and various modifications or changes can be made to the details in the specification based on different views and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0035] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present application in a schematic manner, and only the components related to the present application are shown in the diagrams, not the number, shape and size of the components when actually implemented. The actual implementation of each component may be a random change in type, number and proportion, and the component layout pattern may also be more complex.

[0036] The following embodiments of the present application provide a method and system for selecting the location of a marine substation, an electronic device and a storage medium. The method and system are applied in an electronic device, which will be described below as an example.

[0037] Referring to FIG. 1, a schematic diagram of an application scenario of the method for selecting the location of a marine substation is shown. As shown in FIG. 1, the present embodiment provides a hardware application scenario of the method for selecting the location of a marine substation, which specifically includes an electronic device. The current submarine cable topology connection mode of a marine wind farm, the coordinates of the wind turbine, the submarine cable type and the submarine cable price related data are stored in the electronic device. The electronic device executes the method for selecting the location of a marine substation, and outputs the optimal location of the marine substation corresponding to the current submarine cable topology connection mode of the marine wind farm.

[0038] The electronic device may be, for example, a computer including all or part of components such as a memory, a storage controller, one or more processing units (CPU), a peripheral interface, RF circuitry, audio circuitry, a speaker, a microphone, an input / output (I / O) subsystem, a display screen, other output or control devices, and an external port, etc.; and the computer may include, but is not limited to, a personal computer such as a desktop computer, a notebook computer, a tablet computer, a smart phone, a personal digital assistant (PDA), etc. In other embodiments, the electronic device may also be a server, which may be arranged on one or more physical servers according to functions, loads, and other factors, or may be a cloud server composed of distributed or centralized server clusters, and the present embodiment is not limited thereto.

[0039] The technical solutions in the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0040] Please refer to FIG. 2, which shows a principle flowchart of the offshore substation location selection method according to the embodiments of the present application. As shown in FIG. 2, the present embodiment provides an offshore substation location selection method, which specifically includes the following steps:

[0041] S21, obtaining the coordinates of each wind turbine in the offshore wind farm.

[0042] S22, determining the initial position of the substation according to the coordinates of all wind turbines; the initial position includes a first axis position coordinate and a second axis position coordinate.

[0043] In an embodiment, step S22 includes:

[0044] (1) obtaining the sum of X-axis coordinates and the sum of Y-axis coordinates of all wind turbines in the offshore wind farm.

[0045] (2) determining the X-axis calculation coordinate by dividing the sum of X-axis coordinates by the total number of wind turbines, and determining the Y-axis calculation coordinate by dividing the sum of Y-axis coordinates by the total number of wind turbines.

[0046] Specifically, in the case where the coordinates of wind turbines in the offshore wind farm are known, the position of the offshore booster station or the converter station is initialized. The sum of X-axis coordinates and the sum of Y-axis coordinates of all wind turbines in the offshore wind farm are calculated, and then the X-axis calculation coordinate is determined by dividing the sum of X-axis coordinates by the total number of wind turbines, and the Y-axis calculation coordinate is determined by dividing the sum of Y-axis coordinates by the total number of wind turbines.

[0047] (3) determining the initial position of the substation according to the X-axis calculation coordinate and the Y-axis calculation coordinate.

[0048] In an embodiment, step (3) of S22 includes:

[0049] (1) Determine an initial analysis point according to the X-axis calculation coordinate and the Y-axis calculation coordinate.

[0050] (2) In response to the initial analysis point not being in the sea area constraint region, the coordinate of the initial analysis point is taken as the initial position of the substation. The constraint region refers to the sea area range in which a booster station or a converter station is not allowed to be set.

[0051] Specifically, if the obtained X-axis calculation coordinate and Y-axis calculation coordinate are not in the sea area constraint region, the position determined by the X-axis calculation coordinate and the Y-axis calculation coordinate is taken as the initial position of the offshore booster station or the converter station.

[0052] (3) In response to the initial analysis point being in the sea area constraint region, a position closest to the initial analysis point on the boundary of the sea area constraint region is selected as the initial position of the substation.

[0053] Referring to FIG. 3, a position initialization schematic diagram of the position selection method of the offshore substation is shown. As shown in FIG. 3, all wind turbines are denoted by W. If the wind turbines are in the constraint sea area, i.e., the forbidden sea area denoted by the irregular black line frame in FIG. 3, the following processing needs to be performed: a cross auxiliary line is drawn according to the coordinate of the initial analysis point, and four intersection points are obtained by the cross auxiliary line and the boundary of the constraint sea area. The distance between the four intersection points and the initial coordinate is compared, and the closest point is taken as the initial position coordinate of the offshore booster station or the converter station. In actual application, the cross auxiliary line is only a schematic operation. In essence, a plurality of circumferences intersecting the forbidden sea area are set with the initial analysis point in the constraint sea area as the center. The shortest radius among all the intersection points is the closest point on the boundary of the forbidden sea area to the initial analysis point, i.e., the initial position coordinate of the offshore booster station or the converter station.

[0054] In an embodiment, after step S22 and before step S24, the method further includes:

[0055] An initial submarine cable cost before the disturbance is determined according to the initial position of the substation and the current submarine cable topology connection mode of the offshore wind farm; the initial submarine cable cost is compared with the submarine cable cost determined after the first disturbance of the first axis position coordinate to determine the change of the submarine cable cost.

[0056] Specifically, after obtaining the initial position coordinate of the offshore booster station or the converter station, the coordinate disturbance submarine cable cost calculation is started. The initial position coordinate submarine cable total cost is calculated according to the known submarine cable topology connection mode and the obtained initial coordinate, and the position coordinate of the offshore booster station or the converter station is denoted as B (Bx, By).

[0057] Suppose that the offshore wind farm has W wind turbines, and the corresponding position coordinate set is:

[0058] Since the wind farm topology connection mode and the cost P (P1, P2,..., Pn-1, Pn) of different types of sea cables are known, different types of sea cables correspond to different transmission capacities, that is, the number of wind turbines connected by the sea cable determines the selection of the corresponding sea cable type, the total cost of the sea cable in the offshore wind farm can be calculated to reflect the advantages and disadvantages of the location of the offshore booster station or the converter station. Among them, the number of sea cables collected by the offshore booster station or the converter station is L, wherein the i-th sea cable is connected to S wind turbines of the offshore substation, j1 and j2 correspond to the number of connected wind turbines, and the total cost SUM of the sea cable of the offshore wind farm is cost The total cost SUM of the sea cable of the offshore wind farm can be calculated by the following formula:

[0059] The distance of the segmented sea cable on all the collected sea cables is calculated, and then multiplied by the corresponding sea cable price P of the segmented sea cable to obtain the corresponding cost of the segmented sea cable. The cost of the segmented sea cable on all the collected sea cables is summed to obtain the overall sea cable cost SUM. cost .

[0060] Therefore, the following perturbation of the initial position coordinates can be performed, that is, perturbation in four directions of positive and negative directions of the horizontal coordinate axis and positive and negative directions of the vertical coordinate axis.

[0061] S23, perturbing the first axis position coordinates, determining the sea cable cost corresponding to the current sea cable topology connection mode of the offshore wind farm according to the perturbed coordinates.

[0062] S24, determining the perturbation direction of the first axis position coordinates next time according to the change of the sea cable cost, and performing perturbation and cost analysis successively until the perturbed first axis position coordinates meet the first perturbation condition, and stopping the perturbation of the first axis position coordinates.

[0063] In an embodiment, step S24 specifically includes:

[0064] In response to the sea cable cost being lower in response to the current perturbation being increasing the X position coordinates by a first preset distance, it is determined that the perturbation direction next time is to continue to increase the distance of the X position coordinates; in response to the sea cable cost being higher in response to the current perturbation being increasing the X position coordinates by the first preset distance, it is determined that the perturbation direction next time is to decrease the X position coordinates by the first preset distance.

[0065] Specifically, the X-axis position coordinate of the initial position is increased by 10 meters in the horizontal coordinate, the total cost of the submarine cable of the offshore wind farm after the increase is calculated, if the total cost of the submarine cable after the increase is lower than that before the increase, the horizontal coordinate after the increase is adopted, then the horizontal coordinate is increased by 10^2, and the above process is repeated, after n times of horizontal coordinate disturbance, the horizontal coordinate is increased by 10^n meters; if the cost after the horizontal coordinate is increased is higher than the cost before the increase, the ratio p1 is obtained by dividing the cost after the horizontal coordinate is increased by the sum of the cost before the increase and the cost before n-1 times of reduction, then the Xn distance is obtained by multiplying (1-p1) by 10^n meters, the Xn is increased under the coordinate of n-1 times, and iterative comparison is performed, if Xn<=10 meters, the X-axis coordinate is started to be reduced, and iteration is performed from 10 meters.

[0066] If the overall submarine cable cost scheme cannot be reduced after the X-axis coordinate is disturbed and reduced by 10 meters, the X-axis direction coordinate disturbance is stopped; if the submarine cable cost is lower than the cost before the reduction after the X-axis coordinate is reduced by 10 meters, the horizontal coordinate is continued to be reduced by 10^2, and the above process is repeated. After n times of horizontal coordinate disturbance, the horizontal coordinate is decreased by 10^n meters. If the cost after the horizontal coordinate is reduced is higher than the cost before the reduction, the ratio p1 is obtained by dividing the cost after the horizontal coordinate is reduced by the sum of the cost before the reduction and the cost before n-1 times of reduction, then the Xn distance is obtained by multiplying (1-p1) by 10^n meters, the Xn is reduced under the coordinate of n-1 times, and iterative comparison is performed, if the X-axis coordinate after the disturbance and the reduction satisfies the first disturbance condition Xn<=10 meters, the X-axis disturbance is stopped.

[0067] S25, the second axis position coordinate is disturbed, and the submarine cable cost corresponding to the submarine cable topology connection mode of the offshore wind farm is determined according to the disturbed coordinate.

[0068] S26, the disturbance direction of the second axis position coordinate next time is determined according to the change of the submarine cable cost, and disturbance and cost analysis are performed step by step until the second axis position coordinate after the disturbance satisfies the second disturbance condition, and the second axis position coordinate disturbance is stopped.

[0069] In an embodiment, step S26 specifically includes:

[0070] In response to the current disturbance being increasing the Y position coordinate by a second preset distance, and the submarine cable cost being lower, it is determined that the disturbance direction next time is to continue to increase the distance of the Y position coordinate; in response to the current disturbance being increasing the Y position coordinate by the second preset distance, and the submarine cable cost being higher, it is determined that the disturbance direction next time is to reduce the Y position coordinate by the second preset distance.

[0071] Specifically, after the X-axis coordinate of the offshore booster station or converter station is perturbed and iteratively calculated, the Y-axis coordinate is perturbed. The X-axis coordinate optimized after the perturbation is increased by 10 meters in the Y-axis coordinate, and the total cost of the offshore cable of the offshore wind farm after the increase is calculated. If the total cost of the offshore cable after the increase is lower than that before the increase, the increased X-axis coordinate is adopted, and then the X-axis coordinate is increased by 10^2, and the above process is repeated. After n times of Y-axis coordinate perturbation, the Y-axis coordinate is increased by 10^n meters. If the cost after the Y-axis coordinate is increased is higher than the cost before the increase, the ratio p1 is obtained by dividing the cost after the Y-axis coordinate is increased by the sum of the cost before the increase and the cost before the n-1 times of decrease. Then, Yn distance is obtained by multiplying (1-p1) by 10^n meters. The Y-axis coordinate is increased by Yn under the n-1 times of coordinate, and iterative comparison is performed. If Yn<=10 meters, the Y-axis coordinate is started to be decreased from 10 meters.

[0072] If the overall cable cost scheme cannot be reduced after the Y-axis coordinate is perturbed and decreased by 10 meters, the Y-axis coordinate perturbation is stopped. If the cable cost is lower than the cost before the decrease after the Y-axis coordinate is decreased by 10 meters, the Y-axis coordinate is continued to be decreased by 10^2, and the above process is repeated. After n times of Y-axis coordinate perturbation, the Y-axis coordinate is decreased by 10^n meters. If the cost after the Y-axis coordinate is decreased is higher than the cost before the decrease, the ratio p1 is obtained by dividing the cost after the Y-axis coordinate is decreased by the sum of the cost before the decrease and the cost before the n-1 times of decrease. Then, Yn distance is obtained by multiplying (1-p1) by 10^n meters. The Y-axis coordinate is decreased by Yn under the n-1 times of coordinate, and iterative comparison is performed. If the Y-axis coordinate satisfies the second perturbation condition Yn<=10 meters after the perturbation of the increase and the decrease, the Y-axis perturbation is stopped.

[0073] S27, according to the first axis position coordinate and the second axis position coordinate finally determined after the perturbation, the optimal position of the offshore substation corresponding to the current cable topology connection mode of the offshore wind farm is determined.

[0074] In an embodiment, the method further comprises:

[0075] During the perturbation process of the first axis position coordinate or the second position coordinate, in response to the first axis position coordinate or the second position coordinate after the perturbation entering the sea area constraint region, the sea area constraint region is exited according to the perturbation direction and the perturbation distance.

[0076] Please refer to FIG. 4, which shows a position optimization flow chart of the offshore substation position selection method according to the embodiments of the present application. As shown in FIG. 4, taking a booster station as an example, the method of the present application is executed to first confirm the offshore wind farm fan coordinates and the sea cable data, initialize the offshore booster station position coordinates, then perform X-axis position coordinate perturbation, increase the X-axis position coordinates, calculate the sea cable cost of the perturbed coordinate scheme, determine whether the cost is reduced, if yes, continue to increase the X-axis position coordinates for perturbation, if no, perturb by reducing the X-axis position coordinates. After the corresponding perturbation distance of the X-axis position coordinates is less than 10 meters after perturbation in two directions, the Y-axis position coordinates are perturbed, the Y-axis position coordinates are first increased, the sea cable cost of the perturbed coordinate scheme is calculated, and it is determined whether the cost is reduced. If yes, continue to increase the Y-axis position coordinates for perturbation, if no, perturb by reducing the Y-axis position coordinates. After the corresponding perturbation distance of the Y-axis position coordinates is less than 10 meters after perturbation in two directions, the offshore booster station position optimization is completed.

[0077] Please refer to FIG. 5, which shows a position optimization schematic diagram of the offshore substation position selection method according to the embodiments of the present application. As shown in FIG. 5, the position of the offshore substation ultimately leads to land, and the hollow circle 24 pointed to by the old coordinates in FIG. 5 represents the position of the offshore substation before the method of the present application is executed, and the solid circle 24 pointed to by the new coordinates represents the optimized position of the offshore substation after the method of the present application is executed.

[0078] It should be noted that the offshore substation position selection method according to the present application considers the booster station or converter station position area condition constraint, and can perform position optimization according to the actual engineering application scene condition. It can be based on the position of the offshore substation without any optimization for optimal analysis, or based on any kind of offshore wind farm topology layout optimization method, and the overall optimized offshore wind farm sea cable topology layout obtained after position re-optimization.

[0079] Further, if the offshore wind farm topology connection changes, the new sea cable topology connection mode can be taken as the current sea cable topology connection mode of the offshore wind farm, and the offshore substation position selection method according to the present application is executed to realize the optimization iteration of the substation position under different topology connection modes.

[0080] The protection scope of the offshore substation position selection method according to the embodiments of the present application is not limited to the order of steps listed in the embodiments, and any scheme realized by adding, reducing or replacing steps according to the principle of the present application is included in the protection scope of the present application.

[0081] The embodiment of the present application further provides a position selection system of the offshore substation, which can implement the position selection method of the offshore substation, but the implementation device of the position selection method of the offshore substation includes but is not limited to the structure of the position selection system of the offshore substation listed in the embodiment, and any structure modification and replacement of the prior art according to the principle of the present application are included in the protection scope of the present application.

[0082] Referring to FIG. 6, a structural schematic diagram of the position selection system of the offshore substation according to the embodiment of the present application is shown. As shown in FIG. 6, the embodiment provides a position selection system 6 of the offshore substation, which includes a data module 61 and a position selection module 62.

[0083] The data module 61 is configured to store the current submarine cable topology connection mode of the offshore wind farm, the coordinates of the wind turbine, the submarine cable type and the submarine cable price.

[0084] The position selection module 62 is configured to perform the following steps:

[0085] Obtaining the coordinates of each wind turbine in the offshore wind farm;

[0086] Determining the initial position of the substation according to the coordinates of all wind turbines; the initial position includes a first axis position coordinate and a second axis position coordinate;

[0087] Disturbing the first axis position coordinate, and determining the submarine cable cost corresponding to the current submarine cable topology connection mode of the offshore wind farm according to the disturbed coordinates in combination with the submarine cable type and the submarine cable price;

[0088] Determining the disturbance direction of the first axis position coordinate next time according to the change of the submarine cable cost, and performing disturbance and cost analysis successively until the disturbed first axis position coordinate meets a first disturbance condition, and stopping the disturbance of the first axis position coordinate;

[0089] Disturbing the second axis position coordinate, and determining the submarine cable cost corresponding to the submarine cable topology connection mode of the offshore wind farm according to the disturbed coordinates in combination with the submarine cable type and the submarine cable price;

[0090] Determining the disturbance direction of the second axis position coordinate next time according to the change of the submarine cable cost, and performing disturbance and cost analysis successively until the disturbed second axis position coordinate meets a second disturbance condition, and stopping the disturbance of the second axis position coordinate;

[0091] Determining the optimal position of the offshore substation corresponding to the current submarine cable topology connection mode of the offshore wind farm according to the finally determined first axis position coordinate and the second axis position coordinate after disturbance.

[0092] Further, the position selection module 62, after calculating the optimal position of the offshore booster station or the converter station corresponding to the topology, can also transmit the optimal position of the offshore booster station or the converter station to the data module 61 to form a new offshore wind farm topology connection mode or a sea cable topology connection mode through iteration.

[0093] In several embodiments provided in the present application, it should be understood that the disclosed system or method can be implemented in other manners. For example, the system embodiments described above are merely schematic. For example, the division of the modules / unit is only a logical function division, and there can be another division manner in actual implementation. For example, a plurality of modules or units can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between different modules can be indirect couplings or communication connections through some interfaces, devices or modules, and can be electrical, mechanical or in other forms.

[0094] The modules / unit described as separate components can or can not be physically separate, and the components shown as modules / unit can or can not be physical modules, i.e., can be located in one place or distributed on multiple network units. Some or all of the modules / unit can be selected according to actual needs to achieve the purpose of the embodiments of the present application. For example, the functional modules / unit in each embodiment of the present application can be integrated in one processing module, or each module / unit can be physically present separately, or two or more modules / unit can be integrated in one module / unit.

[0095] Those of ordinary skill in the art should further appreciate that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software or a combination of both. In order to clearly illustrate the interchangeability of hardware and software, each example has been described in general terms in the above description. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0096] Please refer to Figure 7, which shows a structural connection diagram of the electronic device described in the embodiments of the present application. As shown in Figure 7, the electronic device 7 of the present application comprises a processor 71, a memory 72, a communication interface 73 or / and a system bus 74. The memory 72 and the communication interface 73 are connected with the processor 71 through the system bus 74 and complete communication with each other. The memory 72 is used for storing computer programs, the communication interface 73 is used for communicating with other devices, and the processor 71 is used for running the computer programs to make the electronic device 7 execute each step of the offshore substation location selection method.

[0097] The processor 71 described above can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; and can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component.

[0098] The memory 72 described above can contain a random access memory (RAM) and can also include a non-volatile memory, such as at least one disk memory.

[0099] The system bus 74 mentioned above can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The system bus 74 can be divided into an address bus, a data bus, a control bus, etc. The communication interface is used to realize communication between the database access device and other devices (such as a client, a read-write library and a read-only library).

[0100] The embodiments of the present application further provide a computer readable storage medium. Those skilled in the art can understand that all or part of the steps of the methods described in the above embodiments can be instructed by a program to complete the processor, and the program can be stored in a computer readable storage medium. The storage medium is a non-transitory medium, for example, a random access memory, a read only memory, a flash memory, a hard disk, a solid state disk, a magnetic tape, a floppy disk, an optical disc and any combination thereof. The storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, a data center and the like, which includes one or more available media sets. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital video disc (DVD)), or a semiconductor medium (for example, a solid state disk (SSD)) and the like.

[0101] The description of the corresponding flow or structure of each of the above figures has its own emphasis, and the parts not described in detail in a certain flow or structure can be referred to the related description of other flows or structures.

[0102] The above embodiments are only illustrative of the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical idea of the present application should be covered by the claims of the present application.

Claims

1. A method of site selection for a marine substation, characterized by, The method comprises: obtaining the coordinates of each wind turbine in the offshore wind farm; determining the initial position of the substation according to the coordinates of all wind turbines; the initial position comprises a first axis position coordinate and a second axis position coordinate; perturbing the first axis position coordinate, and determining the submarine cable cost corresponding to the current submarine cable topology connection mode of the offshore wind farm according to the perturbed coordinate; determining the perturbation direction of the first axis position coordinate next time according to the change of the submarine cable cost, and performing perturbation and cost analysis successively until the perturbed first axis position coordinate meets the first perturbation condition, and the perturbation of the first axis position coordinate is stopped; including: in response to the submarine cable cost becoming lower after the current perturbation of increasing the first preset distance to the X position coordinate, it is determined that the perturbation direction next time is to continue to increase the distance of the X position coordinate; in response to the submarine cable cost becoming higher after the current perturbation of increasing the first preset distance to the X position coordinate, it is determined that the perturbation direction next time is to reduce the first preset distance to the X position coordinate; perturbing the second axis position coordinate, and determining the submarine cable cost corresponding to the submarine cable topology connection mode of the offshore wind farm according to the perturbed coordinate; determining the perturbation direction of the second axis position coordinate next time according to the change of the submarine cable cost, and performing perturbation and cost analysis successively until the perturbed second axis position coordinate meets the second perturbation condition, and the perturbation of the second axis position coordinate is stopped; including: in response to the submarine cable cost becoming lower after the current perturbation of increasing the second preset distance to the Y position coordinate, it is determined that the perturbation direction next time is to continue to increase the distance of the Y position coordinate; in response to the submarine cable cost becoming higher after the current perturbation of increasing the second preset distance to the Y position coordinate, it is determined that the perturbation direction next time is to reduce the second preset distance to the Y position coordinate; determining the optimal position of the offshore substation corresponding to the current submarine cable topology connection mode of the offshore wind farm according to the finally determined first axis position coordinate and second axis position coordinate after perturbation; The total cost of the sea cable of the offshore wind farm is expressed as: SUM cost is the total cost of the submarine cable of the offshore wind farm, i is the number of the submarine cable of the offshore substation or converter station, j is the number of the wind turbine connected by the submarine cable of the i-th offshore substation or converter station, j1 and j2 are the numbers of the wind turbines connected by the submarine cable, W xj1 represents the position coordinate of the wind turbine numbered j1 in the X-axis, W yj1 represents the position coordinate of the wind turbine numbered j1 in the Y-axis, W xj2 represents the position coordinate of the wind turbine numbered j2 in the X-axis, W yj2 represents the position coordinate of the wind turbine numbered j2 in the Y-axis, Bx represents the position coordinate of the offshore substation or converter station in the X-axis, By represents the position coordinate of the offshore substation or converter station in the Y-axis, W xj represents the position coordinate of the wind turbine j in the X-axis, W yj represents the position coordinate of the wind turbine j in the Y-axis, P represents the cost of the submarine cable of the wind turbine j to the corresponding offshore substation or converter station.

2. The method of claim 1, wherein, The step of determining the initial position of the substation according to the coordinates of all wind turbines comprises: obtaining the sum of X-axis coordinates and the sum of Y-axis coordinates of all wind turbines in the offshore wind farm; determining the X-axis calculation coordinate by dividing the sum of X-axis coordinates by the total number of wind turbines, and determining the Y-axis calculation coordinate by dividing the sum of Y-axis coordinates by the total number of wind turbines; determining the initial position of the substation according to the X-axis calculation coordinate and the Y-axis calculation coordinate. The step of determining the initial position of the substation according to the X-axis calculation coordinate and the Y-axis calculation coordinate comprises:

3. The method of claim 2, wherein, determining the initial analysis point according to the X-axis calculation coordinate and the Y-axis calculation coordinate; in response to the initial analysis point not being in the sea area constraint region, taking the coordinate of the initial analysis point as the initial position of the substation; in response to the initial analysis point being in the sea area constraint region, selecting the position closest to the initial analysis point on the boundary of the sea area constraint region as the initial position of the substation. After the step of determining the initial position of the substation according to the coordinates of all wind turbines, and before the step of determining the perturbation direction of the first axis position coordinate next time according to the change of the submarine cable cost, the method further comprises:

4. The method of claim 1, wherein, ​ Determine the initial sea cable cost before the disturbance according to the initial position of the substation and the current sea cable topology connection mode of the offshore wind farm; the initial sea cable cost is used to compare with the sea cable cost determined after the first disturbance of the first axis position coordinate to determine the change of the sea cable cost.

5. The method of claim 1, wherein, The method further comprises: During the disturbance of the first axis position coordinate or the second axis position coordinate, if the first axis position coordinate or the second axis position coordinate after the disturbance enters the sea area constraint region, then exit the sea area constraint region according to the disturbance direction and the disturbance distance of this time.

6. A location selection system for an offshore substation, characterized by The system comprises: a data module configured to store the current sea cable topology connection mode of the offshore wind farm, the coordinates of the wind turbines, the sea cable type and the sea cable price; a position selection module configured to perform the following steps: obtain the coordinates of each wind turbine in the offshore wind farm; determine the initial position of the substation according to the coordinates of all wind turbines; the initial position comprises the first axis position coordinate and the second axis position coordinate; perform disturbance on the first axis position coordinate, and determine the sea cable cost corresponding to the current sea cable topology connection mode of the offshore wind farm according to the coordinates after the disturbance in combination with the sea cable type and the sea cable price; determine the disturbance direction of the first axis position coordinate next time according to the change of the sea cable cost, and perform disturbance and cost analysis successively until the first axis position coordinate after the disturbance meets the first disturbance condition, and stop the disturbance of the first axis position coordinate; including: in response to that the sea cable cost becomes lower after the current disturbance of increasing the first preset distance to the X position coordinate, determine the disturbance direction next time as continuing to increase the distance of the X position coordinate; in response to that the sea cable cost becomes higher after the current disturbance of increasing the first preset distance to the X position coordinate, determine the disturbance direction next time as reducing the first preset distance to the X position coordinate; perform disturbance on the second axis position coordinate, and determine the sea cable cost corresponding to the sea cable topology connection mode of the offshore wind farm according to the coordinates after the disturbance in combination with the sea cable type and the sea cable price; determine the disturbance direction of the second axis position coordinate next time according to the change of the sea cable cost, and perform disturbance and cost analysis successively until the second axis position coordinate after the disturbance meets the second disturbance condition, and stop the disturbance of the second axis position coordinate; including: in response to that the sea cable cost becomes lower after the current disturbance of increasing the second preset distance to the Y position coordinate, determine the disturbance direction next time as continuing to increase the distance of the Y position coordinate; in response to that the sea cable cost becomes higher after the current disturbance of increasing the second preset distance to the Y position coordinate, determine the disturbance direction next time as reducing the second preset distance to the Y position coordinate; determine the optimal position of the offshore substation corresponding to the current sea cable topology connection mode of the offshore wind farm according to the finally determined first axis position coordinate and the second axis position coordinate after the disturbance; comprise: The total cost of the sea cable of the offshore wind farm is expressed as: SUM cost is the total cost of the submarine cable of the offshore wind farm, i is the number of the submarine cable of the offshore substation or converter station, j is the number of the wind turbine connected by the submarine cable of the i-th offshore substation or converter station, j1 and j2 are the numbers of the wind turbines connected by the submarine cable, W xj1 represents the position coordinate of the wind turbine numbered j1 in the X-axis, W yj1 represents the position coordinate of the wind turbine numbered j1 in the Y-axis, W xj2 represents the position coordinate of the wind turbine numbered j2 in the X-axis, W yj2 represents the position coordinate of the wind turbine numbered j2 in the Y-axis, Bx represents the position coordinate of the offshore substation or converter station in the X-axis, By represents the position coordinate of the offshore substation or converter station in the Y-axis, W xj represents the position coordinate of the wind turbine j in the X-axis, W yj represents the position coordinate of the wind turbine j in the Y-axis, P represents the cost of the submarine cable of the wind turbine j to the corresponding offshore substation or converter station.

7. An electronic device, comprising: a processor and a memory; the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory to enable the electronic device to perform the method in any one of claims 1 to 5. ​ 8. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program, which when executed by the processor, implements the method of any one of claims 1 to 5.

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