Saggoga comprehensive energy base site determination method and device

Abstract

The embodiment of the invention provides a Sagomean comprehensive energy base site determination method and device, and the method comprises the steps: obtaining N pieces of pre-determined site information, and the N pieces of site information comprises at least one piece of thermal power plant site information, at least one piece of converter station site information, and at least one piece of new energy station site information; first safety and stability parameters of each first combination are calculated, and each first combination comprises thermal power plant site information and converter station site information; second safety and stability parameters of each second combination are calculated, and each second combination comprises new energy station site information and a first combination with the first safety and stability parameters meeting a first preset condition; and determining the second combination with the second safety and stability parameter meeting a second preset condition as a feasible combination. Therefore, the combination with the site information meeting the safety and stability is determined as the feasible comprehensive new energy base site, and compared with a simple wind and light base site selection method for site selection of the new energy base, the safety and stability can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of site selection for new energy construction, and in particular to a site selection method and device for a Shagohuang integrated energy base. Background Art

[0002] The main features of large wind and solar bases are green, advanced, economical, safe and efficient. Their planning and site selection focus on deserts, Gobi and wastelands as well as coal mining subsidence areas.

[0003] The site selection of new energy projects is an important part of the whole process of new energy development and construction. The scientificity, rationality and comprehensiveness of site selection are related to the feasibility and subsequent benefits of the entire project. Based on the constraints of the three elements of supporting coal-fired power, transmission lines and new energy, the site selection of new energy bases using the previous simple wind and solar base site selection method is low in safety and stability. Summary of the invention

[0004] The embodiment of the present application provides a Shagohuang integrated energy base site selection method and device, which can solve the problem of low safety and stability in selecting a site for a new energy base using a simple wind and solar base site selection method.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a method for determining the site of a Shagohuang integrated energy base, comprising:

[0007] Acquire N predetermined site information, wherein the N site information includes at least one thermal power plant site information, at least one converter station site information and at least one new energy station site information;

[0008] Calculating a first safety and stability parameter of each first combination, wherein each first combination includes a thermal power plant site information and a converter station site information, and the first safety and stability parameter is a safety and stability parameter of an AC busbar of the converter station;

[0009] Calculating a second safety and stability parameter for each second combination, wherein each second combination includes a new energy station site information and a first combination of the first safety and stability parameter satisfying a first preset condition, and the second safety and stability parameter is a safety and stability parameter on the new energy side;

[0010] A second combination of the second safety and stability parameters that meets a second preset condition is determined as a feasible combination.

[0011] In a second aspect, an embodiment of the present application provides a device for determining the site of a Shagohuang integrated energy base, comprising:

[0012] An acquisition module, used to acquire N predetermined site information, wherein the N site information includes at least one thermal power plant site information, at least one converter station site information and at least one new energy station site information;

[0013] A first calculation module is used to calculate a first safety and stability parameter of each first combination, wherein each first combination includes a thermal power plant site information and a converter station site information, and the first safety and stability parameter is a safety and stability parameter of an AC bus of the converter station;

[0014] A second calculation module is used to calculate a second safety and stability parameter of each second combination, wherein each second combination includes a new energy station site information and a first combination of the first safety and stability parameter that meets a first preset condition, and the second safety and stability parameter is a safety and stability parameter of the new energy side;

[0015] The first determining module is used to determine a second combination of the second safety and stability parameters that meets a second preset condition as a feasible combination.

[0016] In the technical solution provided in the embodiment of the present application, by obtaining N predetermined site information, the N site information includes at least one thermal power plant site information, at least one converter station site information and at least one new energy station site information; calculating the first safety and stability parameter of each first combination, wherein each first combination includes a thermal power plant site information and a converter station site information, and the first safety and stability parameter is the safety and stability parameter of the converter station AC bus; calculating the second safety and stability parameter of each second combination, wherein each second combination includes a new energy station site information and a first combination in which the first safety and stability parameter meets the first preset condition, and the second safety and stability parameter is the safety and stability parameter of the new energy side; determining the second combination in which the second safety and stability parameter meets the second preset condition as a feasible combination. In this way, by determining the combination in which the site information meets the safety and stability as a feasible new energy base site, compared with the use of a simple wind and solar base site selection method to select a new energy base, the safety and stability can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the process of determining the site of the Shagohuang integrated energy base provided in the embodiment of the present application Figure 1 ;

[0018] Figure 2 Schematic diagram of the process of determining the site of the Shagohuang integrated energy base provided in the embodiment of the present application Figure 2 ;

[0019] Figure 3 Schematic diagram of the process of determining the site of the Shagohuang integrated energy base provided in the embodiment of the present application Figure 3 ;

[0020] Figure 4 A schematic diagram of the structure of the Shagohuang integrated energy base site determination device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0022] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not indicate quantity restrictions, but indicate the existence of at least one. Similar words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship also changes accordingly.

[0023] Based on the constraints of supporting coal-fired power, transmission lines, and new energy, the construction of a comprehensive energy base needs to include "supporting coal-fired power", "new energy base", and "transmission channels to ensure the safe delivery of electric energy". Therefore, the site selection of the new energy base needs to consider the site of the thermal power plant, the site of the converter station, the site of the new energy station, and the restrictions of the grid connection scheme. In conjunction with the accompanying drawings, the comprehensive energy base site determination method and device provided in the embodiment of the present application are described in detail through specific embodiments and their application scenarios.

[0024] See also Figure 1 , Figure 1 A flow chart of a method for determining the site of a Shagohuang integrated energy base provided in an embodiment of the present application, the method comprising:

[0025] Step 101, obtaining N predetermined site information, wherein the N site information includes at least one thermal power plant site information, at least one converter station site information and at least one new energy station site information.

[0026] It should be understood that the information of the N predetermined sites, i.e., the preliminary available sites are identified after excluding disruptive factors based on the requirements of the three elements of supporting coal-fired power, transmission lines and new energy. The N sites include at least one thermal power plant, at least one converter station and at least one new energy station. Each thermal power plant, each converter station and each new energy station has corresponding site information, such as geographical location, energy consumption, production capacity, etc.

[0027] Step 102, calculating a first safety and stability parameter of each first combination, wherein each first combination includes site information of a thermal power plant and site information of a converter station, and the first safety and stability parameter is a safety and stability parameter of an AC bus of the converter station.

[0028] It should be understood that the N site information includes at least one first combination, wherein the first combination includes a thermal power plant site information and a converter station site information. The first safety and stability parameter of each first combination in the N site information obtained in step 101 is calculated to determine the safety and stability of the thermal power plant and the converter station corresponding to the first combination.

[0029] Step 103, calculate the second safety and stability parameter of each second combination, wherein each second combination includes a new energy station site information and a first combination of the first safety and stability parameter that meets the first preset condition, and the second safety and stability parameter is the safety and stability parameter of the new energy side.

[0030] It should be understood that the N site information includes at least one second combination, wherein the second combination includes a thermal power plant site information, a converter station site information and a new energy station site information. Among them, the first combination consisting of the thermal power plant site information and the converter station site information in the second combination needs to meet the first preset condition, and the first preset condition is that the first safety and stability parameter of the first combination needs to meet the safety and stability check, that is, the safety and stability parameter of the converter station AC bus meets the safety and stability check.

[0031] When the first combination satisfies the first preset condition, it is combined with one of the N site information to form a second combination, and the second safety and stability parameter of the second combination, that is, the safety and stability parameter of the new energy side, is calculated. The first preset condition is that the first safety and stability parameter is greater than or equal to the first preset value.

[0032] Step 104: Determine a second combination of the second safety and stability parameters that meets a second preset condition as a feasible combination.

[0033] It should be understood that the second preset condition is that the second safety and stability parameter of the second combination must satisfy the safety and stability check, that is, the safety and stability parameter of the new energy side satisfies the safety and stability check. Among them, the second preset condition is that the second safety and stability parameter is greater than or equal to the second preset value.

[0034] On the premise that the second combination satisfies the safety and stability verification, the second combination is determined to be a feasible combination, that is, the site combination formed by the thermal power plant, converter station and new energy station corresponding to the thermal power plant site information, converter station site information and new energy station site information forming the second combination is one of the optional combinations of the comprehensive energy base site.

[0035] In the technical solution provided in the embodiment of the present application, by obtaining N predetermined site information, the N site information includes at least one thermal power plant site information, at least one converter station site information and at least one new energy station site information; calculating the first safety and stability parameter of each first combination, wherein each first combination includes a thermal power plant site information and a converter station site information, and the first safety and stability parameter is the safety and stability parameter of the converter station AC bus; calculating the second safety and stability parameter of each second combination, wherein each second combination includes a new energy station site information and a first combination in which the first safety and stability parameter meets the first preset condition, and the second safety and stability parameter is the safety and stability parameter of the new energy side; determining the second combination in which the second safety and stability parameter meets the second preset condition as a feasible combination. In this way, by determining the combination in which the site information meets the safety and stability as a feasible new energy base site, compared with the use of a simple wind and solar base site selection method to select a new energy base, the safety and stability can be improved.

[0036] Optionally, the method further comprises:

[0037] Calculating economic indicators for each of said feasible combinations;

[0038] The site information in the feasible combination with the best economic index is determined as the final site information.

[0039] It should be understood that the economic indicators of all feasible combinations are calculated, wherein the economic indicators can be calculated by economic evaluation methods such as difference net present value, annual cost, etc. In specific implementation, the best economic indicator means the lowest cost.

[0040] In this embodiment, the economic efficiency can be improved by determining the site information in the feasible combination with the best economic indicators as the final site information, that is, the combination of the thermal power plant, converter station and new energy station corresponding to the final site information is the target comprehensive energy base site.

[0041] Optionally, the method further comprises:

[0042] Determining a second combination in which the second safety and stability parameter does not satisfy the second preset condition as a combination in which a direct current transmission device needs to be configured;

[0043] Calculating economic indicators of each of the feasible combinations and each of the combinations that require configuration of direct current transmission equipment;

[0044] The site information in the combination with the best economic indicators is determined as the final site information.

[0045] It should be understood that when the second safety and stability parameter does not meet the second preset condition, the second preset condition may be that the safety and stability of the first combination does not meet the verification result and / or the safety and stability of the second combination does not meet the verification result, for example: the first safety and stability parameter is less than the first preset value and / or the second safety and stability parameter is less than the second preset value.

[0046] In the case where the second combination whose second safety and stability parameter does not meet the second preset condition is a combination that needs to be equipped with direct current transmission equipment, the economic indicators of the combination that needs to be equipped with direct current transmission equipment are calculated, wherein the economic indicators can also be calculated by economic evaluation methods such as difference net present value and annual cost. Specifically, the direct current transmission equipment that needs to be equipped can be equipped with reactive power compensation equipment to improve the safety and stability of the system; or flexible direct current transmission technology can be used to collect and send new energy.

[0047] In this embodiment, by calculating the economic indicators of each feasible combination and each combination that needs to be equipped with DC transmission equipment, and determining the site information in the combination with the best economic indicators as the final site information, that is, the combination of the thermal power plant, converter station and new energy station corresponding to the final site information is the target comprehensive energy base site, which can improve the economic efficiency.

[0048] Optionally, the distance between the thermal power plant site and the converter station site in each first combination is less than or equal to 50KM.

[0049] In this embodiment, the distance between the thermal power plant site and the converter station site in each first combination is set to be less than or equal to 50 km, so as to meet the support stability requirements of the thermal power plant for new energy.

[0050] Optionally, calculating the first safety and stability parameter of each first combination includes:

[0051] The first safety and stability parameter is calculated by the following formula:

[0052]

[0053] Among them, SCR1 is the short-circuit ratio, which indicates the voltage support strength of the AC system fed by DC; S ac1It represents the short-circuit capacity of the AC busbar in the converter station; Pd represents the DC transmission power.

[0054] In this embodiment, the short-circuit ratio on the converter station side is calculated to obtain the first safety and stability parameter on the converter station side, and then the safety and stability parameter between the thermal power plant and the converter station constituting the first combination is obtained. The safety and stability are verified according to the size of the first safety and stability parameter. On the premise that the first combination meets the safety and stability verification, it is combined with the new energy station, thereby improving the accuracy of site selection for the comprehensive energy base.

[0055] Optionally, calculating the second safety and stability parameter of each second combination includes:

[0056] The second safety and stability parameter is calculated by the following formula:

[0057]

[0058] Among them, SCR2 is the short-circuit ratio, which indicates the voltage support capacity of the DC near-zone new energy station; S ac2 It represents the short-circuit capacity of the AC busbar on the low-voltage side of the step-up transformer at the new energy station; Pd represents the DC transmission power.

[0059] In this embodiment, the short-circuit ratio on the new energy station side is calculated to obtain the second safety and stability parameter on the new energy station side, and then the safety and stability parameters between the thermal power plant, converter station and new energy station corresponding to the thermal power plant site, converter station site and new energy station site constituting the second combination are obtained. The safety and stability are verified according to the size of the second safety and stability parameter. On the premise that the second combination meets the safety and stability verification, the second combination is determined to be a feasible comprehensive energy base site, which can improve the site selection accuracy of the comprehensive energy base site.

[0060] Optionally, the first preset condition is that the first safety and stability parameter is greater than or equal to a first preset value, and the second preset condition is that the second safety and stability parameter is greater than or equal to a second preset value;

[0061] Among them, the first preset value is 3, and the second preset value is 1.5.

[0062] In specific implementation, when the first safety and stability parameter of the first combination is greater than or equal to 3, the second safety and stability parameter of the second combination is calculated, and when the second safety and stability parameter of the second combination is greater than or equal to 1.5, the second combination with the second safety and stability parameter greater than or equal to 1.5 is determined to be a feasible combination. That is, the combination of the thermal power plant, converter station and new energy station corresponding to the thermal power plant site, converter station site and new energy station site constituting the second combination is an optional comprehensive energy base site.

[0063] In order to better understand the technical solution of the method for determining the site of the Shagohuang integrated energy base provided in this application, a detailed description is given below.

[0064] like Figure 2 As shown, a coal power plant site is selected from multiple thermal power plant sites, a converter station site is selected from multiple converter station sites, and a new energy station site is selected from multiple new energy sites. The safety and stability of the converter station are first verified. When the safety and stability verification of the converter station meets the safety and stability requirements, the safety and stability of the new energy side is further verified. When the safety and stability verification of the new energy side meets the safety and stability requirements, the combination of the coal power plant site, the converter station site and the new energy site that meet the safety and stability requirements is determined as the optional Shagohuang Comprehensive Energy Base site.

[0065] In the case that the safety and stability verification of the converter station does not meet the safety and stability requirements, another coal-fired power plant site shall be selected from multiple thermal power plant sites and another converter station site shall be selected from multiple converter station sites, and safety and stability verifications shall be performed on them until the safety and stability verification of the converter station meets the safety and stability requirements.

[0066] When the safety and stability check on the new energy side does not meet the safety and stability requirements, continue to select another new energy station site from multiple new energy station sites and perform a safety and stability check on it until the safety and stability check of the new energy station site meets the safety and stability requirements, and then determine that a combination of another coal-fired power plant site that meets the safety and stability requirements, another converter station site and another new energy site is the optional Shagohuang Comprehensive Energy Base site.

[0067] When the safety and stability verification on the new energy side still does not meet the safety and stability requirements, the DC transmission equipment can be equipped with reactive power compensation equipment, or flexible DC transmission technology can be used to collect and transmit new energy. The combination of the configured coal-fired power plant site, converter station site and new energy site is the optional Shagohuang comprehensive energy base site.

[0068] Furthermore, if Figure 3As shown, firstly, it is clear that there are a number of thermal power plant sites, b number of converter station sites and c number of new energy station sites available initially. A number of thermal power plant sites, b number of converter station sites and c number of new energy station sites form i first combinations and j second combinations, wherein the first combination is a coal power plant site and a converter station site, and the second combination is a combination formed by the first combination and the new energy station site when the first combination meets the preset conditions. When the safety and stability verification of the first combination meets the safety and stability requirements, the safety and stability of the new energy side is further verified. When the safety and stability verification of the new energy side meets the safety and stability requirements, the combination formed by the coal power plant site, converter station site and new energy site that meet the safety and stability requirements is determined as the optional Shagohuang Comprehensive Energy Base site.

[0069] When the safety and stability check of the converter station of the first combination does not meet the safety and stability requirements, another first combination is selected from multiple thermal power plant sites and subjected to safety and stability checks until the safety and stability check of the converter station meets the safety and stability requirements.

[0070] When the safety and stability check on the new energy side of the second combination does not meet the safety and stability requirements, continue to select another new energy station site from the j new energy station sites and perform a safety and stability check on it until the safety and stability check of the new energy station site meets the safety and stability requirements, and then determine that the combination formed by another first combination of safety and stability requirements and another new energy site is the optional Shagohuang comprehensive energy base site.

[0071] When the safety and stability verification of the new energy side in j new energy station sites still fails to meet the safety and stability requirements, DC transmission equipment can be equipped with reactive power compensation equipment, or flexible DC transmission technology can be used to collect and transmit new energy. The combination of the configured coal-fired power plant site, converter station site and new energy site is the optional Shagohuang comprehensive energy base site.

[0072] An economic comparison will be conducted among the m optional Shagohuang integrated energy base sites that meet the safety and stability inspection requirements and the n optional Shagohuang integrated energy base sites after adding compensation measures or VSC transmission technology, and the final Shagohuang integrated energy base site plan will be determined based on project needs.

[0073] See also Figure 4 , Figure 4 A schematic diagram of the structure of a device for determining the site of a Shagohuang integrated energy base provided in an embodiment of the present application, wherein the device 400 for determining the site of an integrated energy base comprises:

[0074] The acquisition module 401 is used to acquire N predetermined site information, wherein the N site information includes at least one thermal power plant site information, at least one converter station site information and at least one new energy station site information;

[0075] A first calculation module 402 is used to calculate a first safety and stability parameter of each first combination, wherein each first combination includes a thermal power plant site information and a converter station site information, and the first safety and stability parameter is a safety and stability parameter of the converter station AC bus;

[0076] A second calculation module 403 is used to calculate a second safety and stability parameter of each second combination, wherein each second combination includes a first combination of a new energy station site information and the first safety and stability parameter that satisfies a first preset condition, and the second safety and stability parameter is a safety and stability parameter of the new energy side;

[0077] The first determining module 404 is configured to determine a second combination of the second safety and stability parameters that meets a second preset condition as a feasible combination.

[0078] Optionally, the device further comprises:

[0079] A third calculation module, used for calculating the economic index of each of the feasible combinations;

[0080] The second determination module is used to determine the site information in the feasible combination with the best economic index as the final site information.

[0081] Optionally, the device further comprises:

[0082] A third determining module, configured to determine a second combination where the second safety and stability parameter does not satisfy the second preset condition as a combination requiring configuration of a direct current transmission device;

[0083] A fourth calculation module, used for calculating the economic index of each of the feasible combinations and each of the combinations requiring configuration of direct current transmission equipment;

[0084] The fourth determination module is used to determine the site information in the combination with the best economic index as the final site information.

[0085] Optionally, the distance between the thermal power plant site and the converter station site in each first combination is less than or equal to 50KM.

[0086] Optionally, calculating the first safety and stability parameter of each first combination includes:

[0087] The first safety and stability parameter is calculated by the following formula:

[0088]

[0089] Among them, SCR1 is the short-circuit ratio, which indicates the voltage support strength of the AC system fed by DC; S ac1 It represents the short-circuit capacity of the AC busbar in the converter station; Pd represents the DC transmission power.

[0090] Optionally, calculating the second safety and stability parameter of each second combination includes:

[0091] The second safety and stability parameter is calculated by the following formula:

[0092]

[0093] Among them, SCR2 is the short-circuit ratio, which indicates the voltage support capacity of the DC near-zone new energy station; S ac2 It represents the short-circuit capacity of the AC busbar on the low-voltage side of the step-up transformer at the new energy station; Pd represents the DC transmission power.

[0094] Optionally, the first preset condition is that the first safety and stability parameter is greater than or equal to a first preset value, and the second preset condition is that the second safety and stability parameter is greater than or equal to a second preset value;

[0095] Among them, the first preset value is 3, and the second preset value is 1.5.

[0096] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A method for determining the site of a Shagohuang integrated energy base, characterized in that: include: Acquire N predetermined site information, wherein the N site information includes at least one thermal power plant site information, at least one converter station site information and at least one new energy station site information; Calculating a first safety and stability parameter of each first combination, wherein each first combination includes a thermal power plant site information and a converter station site information, and the first safety and stability parameter is a safety and stability parameter of an AC busbar of the converter station; Calculating a second safety and stability parameter for each second combination, wherein each second combination includes a new energy station site information and a first combination of the first safety and stability parameter satisfying a first preset condition, and the second safety and stability parameter is a safety and stability parameter on the new energy side; A second combination of the second safety and stability parameters that meets a second preset condition is determined as a feasible combination.

2. The method according to claim 1, characterized in that The method further comprises: Calculating economic indicators for each of said feasible combinations; The site information in the feasible combination with the best economic index is determined as the final site information.

3. The method according to claim 1, characterized in that The method further comprises: Determining a second combination in which the second safety and stability parameter does not satisfy the second preset condition as a combination in which a direct current transmission device needs to be configured; Calculating economic indicators of each of the feasible combinations and each of the combinations that require configuration of direct current transmission equipment; The site information in the combination with the best economic indicators is determined as the final site information.

4. The method according to claim 1, characterized in that: The distance between the thermal power plant site and the converter station site in each first combination is less than or equal to 50 km.

5. The method according to claim 1, characterized in that The calculating of the first safety and stability parameter of each first combination includes: The first safety and stability parameter is calculated by the following formula: Among them, SCR1 is the short-circuit ratio, which indicates the voltage support strength of the AC system fed by DC; S ac1 It represents the AC bus short-circuit capacity of the converter station; Pd represents the DC transmission power.

6. The method according to claim 1, characterized in that The calculating the second safety and stability parameter of each second combination comprises: The second safety and stability parameter is calculated by the following formula: Among them, SCR2 is the short-circuit ratio, which indicates the voltage support capacity of the DC near-zone new energy station; S ac2 It represents the short-circuit capacity of the AC busbar on the low-voltage side of the step-up transformer at the new energy station; Pd represents the DC transmission power.

7. The method according to any one of claims 1 to 6, characterized in that The first preset condition is that the first safety and stability parameter is greater than or equal to a first preset value, and the second preset condition is that the second safety and stability parameter is greater than or equal to a second preset value; Among them, the first preset value is 3, and the second preset value is 1.

5.

8. A device for determining the site of a Shagohuang integrated energy base, characterized in that: include: An acquisition module, used to acquire N predetermined site information, wherein the N site information includes at least one thermal power plant site information, at least one converter station site information and at least one new energy station site information; A first calculation module is used to calculate a first safety and stability parameter of each first combination, wherein each first combination includes a thermal power plant site information and a converter station site information, and the first safety and stability parameter is a safety and stability parameter of an AC bus of the converter station; A second calculation module is used to calculate a second safety and stability parameter of each second combination, wherein each second combination includes a new energy station site information and a first combination of the first safety and stability parameter that meets a first preset condition, and the second safety and stability parameter is a safety and stability parameter of the new energy side; The first determining module is used to determine a second combination of the second safety and stability parameters that meets a second preset condition as a feasible combination.

9. The device according to claim 8, characterized in that The device also includes: A third calculation module, used for calculating the economic index of each of the feasible combinations; The second determination module is used to determine the site information in the feasible combination with the best economic index as the final site information.

10. The device according to claim 8, characterized in that The device also includes: A third determining module, configured to determine a second combination where the second safety and stability parameter does not satisfy the second preset condition as a combination requiring configuration of a direct current transmission device; A fourth calculation module, used for calculating the economic index of each of the feasible combinations and each of the combinations requiring configuration of direct current transmission equipment; The fourth determination module is used to determine the site information in the combination with the best economic index as the final site information.

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