A novel DC SSPC configuration design method based on system load requirements

Abstract

This invention belongs to the technical field of aviation secondary power distribution systems and discloses a novel DC SSPC configuration design method based on system load requirements. First, the specifications, quantity, and location of loads in the aircraft are identified through a system load requirement list to obtain design constraints. Then, configuration design principles are formulated based on engineering experience, and a configuration evaluation system is established. Next, the parameter ranges for each SSPC configuration item are set according to the constraints and engineering experience. All SSPC configuration combinations are obtained according to these parameter ranges. Then, the SSPC configuration combinations are screened according to the configuration design principles to obtain the SSPC configurations that meet the requirements. Finally, the SSPC configurations are weighted and scored using various evaluation factors in the configuration evaluation system to obtain the configuration design with the optimal score. This solution has advantages such as high efficiency and short development cycle, and can meet the growing power supply and distribution needs of multi-electric aircraft power distribution systems.

Description

Technical Field

[0001] This invention belongs to the technical field of aviation secondary power distribution systems, specifically relating to a novel DC SSPC configuration design method based on system load requirements. Background Technology

[0002] As aircraft continue to evolve towards greater electrification and even full electrification, the demand for onboard power is increasing, and the number and types of electrical loads are gradually increasing, making aircraft power supply and distribution systems increasingly complex. In particular, aircraft power distribution systems have evolved from a single centralized distribution system to a diversified distributed distribution system. As the terminal product of the secondary power distribution system, the SSPC (Secondary Service PC) is the most numerous power distribution product on board. Therefore, the number of SSPCs directly affects aircraft flight safety and maintenance costs. Different SSPC configurations result in variations in the number of SSPCs on board. How to design SSPCs that meet the aircraft's power load requirements while minimizing the number of SSPCs and reducing maintenance costs is a pressing issue that needs to be addressed.

[0003] Currently, domestic and international research on SSPCs mainly focuses on the protection functions, device characteristics, and behavioral patterns of the SSPC itself. For example, Northwestern Polytechnical University, in its paper "Research on Arc Detection Functional Characteristics of AC SSPC Based on Wavelet Transform," proposed a method using Db3 wavelet three-level decomposition to extract features from normal current waveforms and arc current waveforms to identify arc faults in circuits, thus enabling the SSPC to have arc fault protection functions. For example, Nanjing University of Aeronautics and Astronautics, in its paper "A Novel Behavioral Model of DC Solid-State Power Controller," built a DC SSPC simulation model to study the SSPC's turn-on and turn-off characteristics, improving the SSPC's speed and convergence performance. However, no relevant literature or patents have been found regarding the research on SSPC board configuration. Summary of the Invention

[0004] To address the technical problem of optimizing the configuration design of the secondary power distribution system (SSPC) for aircraft, this invention proposes a DC SSPC configuration design method based on system load. Compared with the previous single configuration design of DC SSPC, this invention establishes a complete SSPC conceptual design method and evaluation system. By using an exhaustive method to evaluate all possible SSPC configurations, the optimal configuration is obtained, reducing the configuration iteration problem in the later stages of product design.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A novel DC SSPC configuration design method based on system load requirements includes the following steps:

[0007] Step 1: By reviewing the system load requirements list, identify the load specifications, quantity of each specification, and location of each load in the aircraft to obtain design constraints.

[0008] 1) The load specifications mainly involve five specifications: 3A / 5A / 7.5A / 10A / 15A;

[0009] 2) According to the system load list, the quantity of each load specification is N3A / N5A / N7.5A / N10A / N15A;

[0010] 3) The load location mainly refers to the power distribution product where the SSPC board that supplies power to the load is located. According to the system load list, the quantity of each specification in each power distribution product is obtained, that is, RPDU1_15A-RPDU12_15A, RPDU1_10A-RPDU12_10A, RPDU1_7.5A-RPDU12_7.5A, RPDU1_5A-RPDU12_5A, RPDU1_3A-RPDU12_3A.

[0011] Step 2: Establish configuration design principles based on engineering experience and build a configuration evaluation system;

[0012] 1) From the perspective of the overall system, the main factors that need to be considered are the basic requirements for the number of power distribution loads;

[0013] 2) Power limitations of single-board cards;

[0014] 3) The channel margin for each power distribution product should be higher than 20%;

[0015] 4) Products with a load margin of less than 30% should have empty card slots reserved for future use;

[0016] 5) The remaining channel specifications of each RPDU product should be able to cover the full rated current specifications of the load. Empty slots should be reserved for products that do not meet this requirement.

[0017] 6) Number of circuit boards;

[0018] 7) Number of channels;

[0019] 8) Allowance for each load specification.

[0020] Step 3: Define the SSPC configuration combination range, and obtain all SSPC configuration combinations based on the SSPC configuration combination range;

[0021] 1) Establish the configuration term parameters as shown in the table below;

[0022]

[0023] 2) The quantity ranges m(max), m(min), M(max), and M(min) of low-power and high-power boards should be calculated from the load requirement list;

[0024] 3) The range of the number of small-power boards and high-power single channels, n(max), n(min), N(max), N(min), should be derived from the board size and engineering experience.

[0025] Step 4: Based on the configuration design principles, screen the SSPC configuration combinations to obtain SSPC configurations that meet the requirements; the specific details are as follows:

[0026] 1) Rated channel quantity requirements: Considering the programmable current factor, 5A can be programmed down to 3A, 7.5A can be programmed down to 5A and 3A, 10A can be programmed down to 7.5A and 5A, and 15A can be programmed down to 10A, 7.5A and 5A.

[0027] 2) Based on the configuration combination parameter table, establish an SSPC board combination model. To narrow down the combination range and meet the above constraints, the following constraints can be established:

[0028] (1)n(min)≤L_3A+L_5A+L_7.5A+L_10A+L_15A≤n(max);

[0029] (2) N(min)≤H_3A+H_5A+H_7.5A+H_10A+H_15A≤N(max);

[0030] (3) m(min)+M(min)≤m+M≤m(max)+M(max);

[0031] (4) L_15A*m+H_15A*M≥N15A;

[0032] (5) L_15A*m+H_15A*M+ L_10A*m+H_10A*M-N15A≥N10A;

[0033] (6) L_15A*m+H_15A*M+L_10A*m+H_10A*M+L_7.5A*m+H_7.5A*M-(N15A+N10A)≥N7.5A;

[0034] (7) L_15A*m+H_15A*M+L_10A*m+H_10A*M+L_7.5A*m+H_7.5A*M+L_5A*m+H_5A*M-(N15A+N10A+N7.5A)≥N5A;

[0035] (8) L_15A*m+H_15A*M+L_10A*m+H_10A*M+L_7.5A*m+H_7.5A*M+L_5A*m+H_5A*M+L_3A*m+H_3A*M-(N15A+N10A+N7.5A+N5A)≥N3A;

[0036] 3) Assuming there are k combinations selected in the first round, a parameter combination matrix can be obtained:

[0037] ;

[0038] 4) Extract P1(1)=[m1,n1,…,H_10A1,H_15A1] from the matrix. Therefore, the second round of selection can be transformed into a ranking and combination problem. Place m1 low-power boards and M1 high-power boards into 12 RPDU products, and meet the load requirements of each RPDU product. Now assume that the number of low-power boards placed in each RPDU is x1,x2,…,x11,x12; and the number of high-power boards placed in each RPDU is y1,y2,…,y11,y12. Then the following relationship must be satisfied when selecting the second round of combinations:

[0039] (1)x1*L_15A1+y1*H_15A1>RPDU1_15A;

[0040] (2)x1*L_15A1+y1*H_15A1+x1*L_10A1+y1*H_10A1-RPDU1_15A≥RPDU1_10A;

[0041] (3)x1*L_15A1+y1*H_15A1+x1*L_10A1+y1*H_10A1+x1*L_7.5A1+y1*H_7.5A1-(RPDU1_15A+ RPDU1_10A)≥RPDU1_7.5A;

[0042] (4)x1*L_15A1+y1*H_15A1+x1*L_10A1+y1*H_10A1+x1*L_7.5A1+y1*H_7.5A1+x1*L_5A1+y1*H_5A1-(RPDU1_15A+RPDU1_10A+RPDU1_7.5A)≥RPDU1_5A;

[0043] (5)x1*L_15A1+y1*H_15A1+x1*L_10A1+y1*H_10A1+x1*L_7.5A1+y1*H_7.5A1+x1*L_5A1+y1 *H_5A1+x1*L_3A1+y1*H_3A1-(RPDU1_15A+RPDU1_10A+RPDU1_7.5A+RPDU1_5A)≥RPDU1_3A;

[0044] (6) [x1*L_15A1+y1*H_15A1+x1*L_10A1+y1*H_10A1+x1*L_7.5A1+y1*H_7.5A1+x1*L_5A1+y1*H_5A1+x1*L_3A1+y1*H_3A1-(RP DU1_15A+RPDU1_10A+RPDU1_7.5A+RPDU1_5A+RPDU1_3A)] / (RPDU1_15A+RPDU1_10A+RPDU1_7.5A+RPDU1_5A+RPDU1_3A)]≥20%.

[0045] Step 5: Weight the SSPC configurations using the various evaluation factors in the configuration evaluation system to obtain the configuration design with the optimal score; details are as follows:

[0046] 1) Assuming there are s combinations selected in the second round of selection, we can obtain a parameter combination matrix:

[0047] ;

[0048] 2) Obtain the weighted scoring items for each combination based on the results of the second screening;

[0049] 3) Let the weighting coefficient for the number of boards be k1, the weighting coefficient for the number of channels be k2, and the weighting coefficient for the margin of each load specification be k3; the recommended value for the weighting coefficient for the number of boards be k1 is 0.25, the recommended value for the weighting coefficient for the number of channels be k2 is 0.35, and the recommended value for the weighting coefficient for the margin of each load specification be k3 is 0.4.

[0050] 4) The final combined evaluation score is calculated by weighting coefficients and weighted scoring items. The weighted calculation evaluation method is as follows: the weighted scoring items are first normalized by the average value, then the weighting coefficients are divided by each weighted scoring value, and finally the weighted scoring values ​​are added together to obtain the final score.

[0051] Compared with the prior art, the present invention has the following beneficial effects:

[0052] 1. Compared with the previous single configuration design of DC SSPC, the present application establishes a complete SSPC conceptual design method and evaluation system. By exhaustively evaluating all possible SSPC configurations, the optimal configuration is obtained, which reduces the configuration iteration problem in the later stage of product design.

[0053] 2. This invention has the advantages of high efficiency and short development cycle, and can meet the growing power supply and distribution needs of multi-electric aircraft power distribution systems. Attached Figure Description

[0054] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of the present invention.

[0055] Figure 1 Schematic diagram of the secondary power distribution system architecture of the present invention;

[0056] Figure 2 This is a schematic diagram of the internal structure of the RPDU of the present invention;

[0057] Figure 3 This is a schematic diagram of the SSPC board composition of the present invention. Detailed Implementation

[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0059] The secondary power distribution system architecture adopted in this invention is as follows: Figure 1 As shown, the SSPC is contained in the RPDU, as follows Figure 2 As shown, the specific steps for SSPC configuration design are as follows:

[0060] Step 1: By sorting out the load specifications, the quantity of each specification, and the location of each load in the aircraft through the system load requirement list, the design constraints are obtained; the list obtained in this embodiment is shown in the table below.

[0061] Aircraft 28V DC Load List

[0062]

[0063] 1) The load specifications mainly involve five types: 3A / 5A / 7.5A / 10A / 15A. Therefore, the internal configuration of the DC SSPC should be as follows: Figure 3 As shown;

[0064] 2) According to the system load list, the quantities of each load specification are N3A=674, N5A=148, N7.5A=48, N10A=28, and N15A=34.

[0065] 3) The load location mainly refers to the power distribution product where the SSPC board that supplies power to the load is located. According to the system load list, the quantity of each specification in each power distribution product is obtained, that is, RPDU1_15A-RPDU12_15A, RPDU1_10A-RPDU12_10A, RPDU1_7.5A-RPDU12_7.5A, RPDU1_5A-RPDU12_5A, RPDU1_3A-RPDU12_3A;

[0066] Step 2: Establish configuration design principles based on engineering experience and build a configuration evaluation system;

[0067] 1) From the perspective of the overall system, the main factors that need to be considered are the basic requirements for the quantity of power distribution load;

[0068] 2) Power limitations of single-board cards;

[0069] 3) The channel margin for each power distribution product should be higher than 20%;

[0070] 4) Products with a load margin of less than 30% should have empty card slots reserved for future use;

[0071] 5) The remaining channel specifications of each RPDU product should be able to cover the full rated current specifications of the load. Empty slots should be reserved for products that do not meet this requirement.

[0072] 6) Number of circuit boards;

[0073] 7) Number of channels;

[0074] 8) Allowance for each load specification.

[0075] Step 3: Define the SSPC configuration combination range, and obtain all SSPC configuration combinations based on the SSPC configuration combination range;

[0076] 1) Establish the configuration term parameters as shown in the table below:

[0077]

[0078] 2) As shown in the table above, the quantities of low-power and high-power boards are m(max)=84, m(min)=27, M(max)=36, and M(min)=2, which should be calculated from the load requirement list.

[0079] 3) As shown in the table above, the number of low-power boards and high-power single channels are n(max)=20, n(min)=17, N(max)=14, and N(min)=11.

[0080] Step 4: Based on the configuration design principles, screen the SSPC configuration combinations to obtain SSPC configurations that meet the requirements; the specific details are as follows:

[0081] 1) Rated channel quantity requirements: Considering the programmable current factor, 5A can be programmed down to 3A, 7.5A can be programmed down to 5A and 3A, 10A can be programmed down to 7.5A and 5A, and 15A can be programmed down to 10A, 7.5A and 5A.

[0082] 2) Based on the configuration combination parameter table, establish an SSPC board combination model. To narrow down the combination range and meet the above constraints, the following constraints can be established:

[0083] (1)17≤L_3A+L_5A+L_7.5A+L_10A+L_15A≤20;

[0084] (2)11≤H_3A+H_5A+H_7.5A+H_10A+H_15A≤14;

[0085] (3) 56≤m+M≤120;

[0086] (4) L_15A*m+H_15A*M≥34;

[0087] (5) L_15A*m+H_15A*M+ L_10A*m+H_10A*M-N15A≥28;

[0088] (6) L_15A*m+H_15A*M+L_10A*m+H_10A*M+L_7.5A*m+H_7.5A*M-(N15A+N10A)≥48;

[0089] (7) L_15A*m+H_15A*M+L_10A*m+H_10A*M+L_7.5A*m+H_7.5A*M+L_5A*m+H_5A*M-(N15A+ N10A+N7.5A)≥148;

[0090] (8) L_15A*m+ H_15A*M+ L_10A*m+ H_10A*M+ L_7.5A*m+H_7.5A*M+ L_5A*m+ H_5A*M+ L_3A*m+ H_3A*M-(N15A+ N10A+N7.5A+ N5A)≥647.

[0091] 3) The first round of selection yields 28,984 combinations, resulting in a parameter combination matrix:

[0092] ;

[0093] 4) Extract P1(1)=[m1,n1,…,H_10A1,H_15A1] from the matrix. Therefore, the second round of selection can be transformed into a ranking and combination problem. Place m1 low-power boards and M1 high-power boards into 12 RPDU products, and meet the load requirements of each RPDU product. Now assume that the number of low-power boards placed in each RPDU is x1,x2,…,x11,x12; and the number of high-power boards placed in each RPDU is y1,y2,…,y11,y12. Then the following relationship must be satisfied when selecting the second round of combinations:

[0094] (1)x1*L_15A1+y1*H_15A1>4;

[0095] (2)x1*L_15A1+y1*H_15A1+x1*L_10A1+y1*H_10A1-RPDU1_15A≥2;

[0096] (3)x1*L_15A1+y1*H_15A1+x1*L_10A1+y1*H_10A1+x1*L_7.5A1+y1*H_7.5A1-(RPDU1_15A+ RPDU1_10A)≥0;

[0097] (4)x1*L_15A1+y1*H_15A1+x1*L_10A1+y1*H_10A1+x1*L_7.5A1+y1*H_7.5A1+x1*L_5A1+y1*H_5A1-(RPDU1_15A+RPDU1_10A+RPDU1_7.5A)≥14;

[0098] (5)x1*L_15A1+y1*H_15A1+x1*L_10A1+y1*H_10A1+x1*L_7.5A1+y1*H_7.5A1+x1*L_5A1 +y1*H_5A1+x1*L_3A1+y1*H_3A1-(RPDU1_15A+RPDU1_10A+RPDU1_7.5A+RPDU1_5A)≥60;

[0099] (6) [x1*L_15A1+y1*H_15A1+x1*L_10A1+y1*H_10A1+x1*L_7.5A1+y1*H_7.5A1+x1*L_5A1+y1*H_5A1+x1*L_3A1+y1*H_3A1-(RP DU1_15A+RPDU1_10A+RPDU1_7.5A+RPDU1_5A+RPDU1_3A)] / (RPDU1_15A+RPDU1_10A+RPDU1_7.5A+RPDU1_5A+RPDU1_3A)]≥20%.

[0100] Step 5: Weight the SSPC configurations using the various evaluation factors in the configuration evaluation system to obtain the configuration design with the optimal score; details are as follows:

[0101] 1) The second selection yields 819 combinations, resulting in a parameter combination matrix:

[0102] ;

[0103] 2) Obtain the weighted scoring items for each combination based on the results of the second screening;

[0104] 3) Set the weighting coefficient for the number of boards k1=0.25, the weighting coefficient for the number of channels k2=0.35, and the weighting coefficient for the margin of each load specification k3=0.4;

[0105] 4) The final combined evaluation score is calculated by weighting coefficients and weighted scoring items.

[0106] The highest-rated DC SSPC configuration is:

[0107]

[0108] Thus, the objective of this invention has been achieved.

[0109] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A novel DC SSPC configuration design method based on system load requirements, characterized in that... It includes the following steps: Step 1: Analyze the load specifications, quantity of each specification, and location of each load in the aircraft using the system load requirements list to obtain design constraints. 1) The load specifications include five types: 3A, 5A, 7.5A, 10A, and 15A; 2) According to the system load list, the quantities of each load specification are N3A, N5A, N7.5A, N10A, and N15A respectively; 3) Load location refers to the power distribution product where the SSPC board that supplies power to the load is located. According to the system load list, the quantity of each specification in each power distribution product is obtained, that is, RPDU1_15A-RPDU12_15A, RPDU1_10A-RPDU12_10A, RPDU1_7.5A-RPDU12_7.5A, RPDU1_5A-RPDU12_5A, RPDU1_3A-RPDU12_3A; where RPDU1-RPDU12 represent 12 load locations; Step 2: Establish configuration design principles based on engineering experience and build a configuration evaluation system; The design principles specifically include the following: 1) From the perspective of the overall system, factors that need to be considered include the required number of power distribution loads; 2) Power limitations of single-board cards; 3) The channel margin for each power distribution product should be higher than 20%; 4) Products with a load margin of less than 30% should have empty card slots reserved for future use; 5) The remaining channel specifications of each RPDU product should be able to cover the full rated current specifications of the load. Empty slots should be reserved for products that do not meet this requirement. The evaluation system specifically includes the following: 1) Number of circuit boards; 2) Number of channels; 3) Allowance for each load specification; Step 3: Define the SSPC configuration combination range, and obtain all SSPC configuration combinations based on the SSPC configuration combination range: 1) Establish a configuration parameter table; 2) The quantity ranges m(max), m(min), M(max), and M(min) of low-power and high-power boards should be calculated from the load requirement list, where m is the quantity of low-power boards and M is the quantity of high-power boards. 3) The range of the number of single channels for low-power and high-power boards, n(max), n(min), N(max), and N(min), should be derived from the board size and engineering experience, where n is the number of single channels for low-power boards and N is the number of single channels for high-power boards. Step 4: Based on the configuration design principles, screen the SSPC configuration combinations to obtain SSPC configurations that meet the requirements: 1) The rated number of channels must take into account the programmable current factor; 2) Based on the configuration combination parameter table, establish the SSPC board combination model. To meet the configuration design principles, narrow down the combination range and establish the following constraints: (1)n(min)≤L_3A+L_5A+L_7.5A+L_10A+L_15A≤n(max); (2) N(min)≤H_3A+H_5A+H_7.5A+H_10A+H_15A≤N(max); (3) m(min)+M(min)≤m+M≤m(max)+M(max); (4) L_15A*m+H_15A*M≥N15A; (5) L_15A*m+H_15A*M+ L_10A*m+H_10A*M-N15A≥N10A; (6) L_15A*m+H_15A*M+L_10A*m+H_10A*M+L_7.5A*m+H_7.5A*M-(N15A+N10A)≥N7.5A; (7) L_15A*m+H_15A*M+L_10A*m+H_10A*M+L_7.5A*m+H_7.5A*M+L_5A*m+H_5A*M-(N15A+N10A+N7.5A)≥N5A; (8) L_15A*m+H_15A*M+L_10A*m+H_10A*M+L_7.5A*m+H_7.5A*M+L_5A*m+H_5A*M+L_3A*m+H_3A*M-(N15A+N10A+N7.5A+N5A)≥N3A; Where L_3A-L_15A represent the number of low-power boards allocated to different load specifications, and H_3A-H_15A represent the number of high-power boards allocated to different load specifications. 3) Assuming there are k combinations selected in the first round, a parameter combination matrix can be obtained: ； 4) Extract P1(1)=[m1,n1,…,H_10A1,H_15A1] from the matrix. Therefore, the second round of selection can be transformed into a ranking and combination problem. Place m1 low-power boards and M1 high-power boards into 12 RPDU products, and meet the load requirements of each RPDU product. Now assume that the number of low-power boards placed in each RPDU is x1,x2,…,x11,x12; and the number of high-power boards placed in each RPDU is y1,y2,…,y11,y12. Then the following relationship must be satisfied when selecting the second round of combinations: (1)x1*L_15A1+y1*H_15A1>RPDU1_15A; (2)x1*L_15A1+y1*H_15A1+x1*L_10A1+y1*H_10A1-RPDU1_15A≥RPDU1_10A; (3)x1*L_15A1+y1*H_15A1+x1*L_10A1+y1*H_10A1+x1*L_7.5A1+y1*H_7.5A1-(RPDU1_15A+ RPDU1_10A)≥RPDU1_7.5A; (4)x1*L_15A1+y1*H_15A1+x1*L_10A1+y1*H_10A1+x1*L_7.5A1+y1*H_7.5A1+x1*L_5A1+y1*H_5A1-(RPDU1_15A+RPDU1_10A+RPDU1_7.5A)≥RPDU1_5A; (5)x1*L_15A1+y1*H_15A1+x1*L_10A1+y1*H_10A1+x1*L_7.5A1+y1*H_7.5A1+x1*L_5A1+y1 *H_5A1+x1*L_3A1+y1*H_3A1-(RPDU1_15A+RPDU1_10A+RPDU1_7.5A+RPDU1_5A)≥RPDU1_3A; (6) [x1*L_15A1+y1*H_15A1+x1*L_10A1+y1*H_10A1+x1*L_7.5A1+y1*H_7.5A1+x1*L_5A1+y1*H_5A1+x1*L_3A1+y1*H_3A1-(RP DU1_15A+RPDU1_10A+RPDU1_7.5A+RPDU1_5A+RPDU1_3A)] / (RPDU1_15A+RPDU1_10A+RPDU1_7.5A+RPDU1_5A+RPDU1_3A)]≥20%; Step 5: Use the various evaluation factors in the configuration evaluation system to assign a weighted score to the SSPC configuration to obtain the configuration design with the best score.

2. The novel DC SSPC configuration design method based on system load requirements according to claim 1, characterized in that, Step 5 specifically includes the following: 1) Assuming there are s combinations selected in the second screening, a parameter combination matrix P2 can be obtained; 2) Obtain the weighted scoring items for each combination based on the results of the second screening; 3) Set the weighting coefficient for the number of boards as k1, the weighting coefficient for the number of channels as k2, and the weighting coefficient for the margin of each load specification as k3; 4) The final combined evaluation score is calculated by weighting coefficients and weighted scoring items.

3. The novel DC SSPC configuration design method based on system load requirements according to claim 1, characterized in that, The configuration combination screening method specifically includes the following: 5A can be downprogrammed to 3A, 7.5A can be downprogrammed to 5A and 3A, 10A can be downprogrammed to 7.5A and 5A, and 15A can be downprogrammed to 10A, 7.5A and 5A.

4. The novel DC SSPC configuration design method based on system load requirements according to claim 2, characterized in that, The weighting coefficients are as follows: the weighting coefficient for the number of boards, k1, is 0.25; the weighting coefficient for the number of channels, k2, is 0.35; and the weighting coefficient for the margin of each load specification, k3, is 0.

4.

5. A novel DC SSPC configuration design method based on system load requirements according to claim 2, characterized in that, The weighted evaluation method is as follows: First, the weighted scoring items are normalized using the average value. Then, the weighting coefficient is multiplied by each weighted scoring value. Finally, the weighted scoring values ​​are added together to obtain the final score.

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