An ac-dc microgrid collaborative control system

Abstract

The application discloses an AC / DC micro-grid cooperative control system and relates to the field of power transmission and transformation. The application comprises: a plurality of AC power stations which respectively transmit electric energy to power storage stations and power grids; a plurality of DC power stations which respectively transmit electric energy to power storage stations and power grids; and a plurality of power consumption ends which acquire electric energy through the power grids; and a control unit which operates in the following manner: acquiring power consumption power of the power consumption ends; acquiring power generation power of the AC power stations and the DC power stations; and selecting the AC power stations and the DC power stations to be connected to the power grids for power supply according to the sum of the power consumption power, wherein the sum of the power consumption power is equal to the power generation power of the AC power stations and the DC power stations connected to the power grids for power supply. The application effectively avoids the problem that power generation and power consumption fluctuation affects power supply quality by cooperatively controlling the micro-grid.

Description

Technical Field

[0001] This invention belongs to the field of power transmission and transformation technology, and in particular relates to a collaborative control system for AC / DC microgrids. Background Technology

[0002] In environments such as islands and oases where the main power grid cannot reach, various methods of power generation are needed to meet the electricity needs of local residents and facilities, and this power is then transmitted and transformed through microgrids. Due to the unique local environment and the diversity of power plants connected to microgrids, the scale of these power plants is relatively small and their fluctuations are uncertain, including solar power plants, small hydropower, small wind power, and tidal power generation. To avoid fluctuations in power generation and consumption within the microgrid, coordinated control is required in the transmission and transformation process. Summary of the Invention

[0003] The purpose of this invention is to provide an AC / DC microgrid collaborative control system, which effectively avoids the problem of power supply quality being affected by fluctuations in power generation and consumption by coordinating the control of the microgrid.

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0005] This invention provides an AC / DC microgrid collaborative control system, comprising:

[0006] Several AC power stations transmit electrical energy to storage power stations and the power grid, respectively.

[0007] Several DC power stations respectively transmit electrical energy to the storage power station and the power grid; and,

[0008] Several power-consuming terminals obtain electrical energy through the power grid;

[0009] The control unit operates in the following manner:

[0010] Obtain the power consumption of the power-consuming terminal;

[0011] Obtain the power generation capacity of the AC power station and the DC power station by their respective numbers;

[0012] The AC power station and the DC power station are selected to be connected to the power grid for power supply based on the sum of the power consumption of the power consumption terminals, wherein the sum of the power consumption is equal to the power generation of the AC power station and the DC power station connected to the power grid for power supply.

[0013] In one embodiment of the present invention, the step of selecting the AC power station and the DC power station to be connected to the power grid for power supply based on the sum of the power consumption of the power-consuming terminals includes,

[0014] The power generation capacity of the AC power station and the DC power station is initially sorted to obtain an initial sequence;

[0015] Insert half of the power consumption of the power-consuming terminal into the initial sequence;

[0016] The power generation capacity of the AC power station and the DC power station in the initial sequence is compared with half of the power consumption capacity of the power consumption terminal. Taking half of the power consumption capacity of the power consumption terminal as a reference, the elements in the initial sequence are arranged on both sides of half of the power consumption capacity of the power consumption terminal to obtain the sequence to be retrieved.

[0017] The AC power station and the DC power station on both sides of half of the power consumption of the power consumption terminal in the search sequence are selected in turn and accumulated to obtain the accumulated result until the accumulated result is equal to or greater than the power consumption of the power consumption terminal.

[0018] If the accumulated result is greater than the power consumption of the power-consuming terminal, the portion exceeding the power consumption of the power-consuming terminal will be stored in the power storage station or abandoned.

[0019] In one embodiment of the present invention, the step of comparing the power generation of the AC power station and the DC power station in the initial sequence with half of the power consumption of the power consumption terminal, and arranging the elements in the initial sequence on both sides of half of the power consumption terminal to obtain the sequence to be retrieved, using half of the power consumption terminal as a reference, further includes:

[0020] Sort the AC power stations and DC power stations in the search sequence whose power consumption is greater than half of the power consumption of the power consumption terminal by size;

[0021] Sort the AC power stations and DC power stations in the search sequence whose power consumption is less than half of the power consumption of the power consumption terminal by size;

[0022] Based on the size sorting results, the sequence to be searched is reordered, and the power generation capacity of the AC power station and the DC power station in the sequence to be searched is sorted according to the numerical value.

[0023] In one embodiment of the present invention, the step of comparing the power generation of the AC power station and the DC power station in the initial sequence with half of the power consumption of the power consumption terminal, and arranging the elements in the initial sequence on both sides of half of the power consumption terminal to obtain the sequence to be retrieved, using half of the power consumption terminal as a reference, further includes:

[0024] Obtain historical power generation data of the AC power station and the DC power station, and calculate the historical variance of power generation of each AC power station and the DC power station;

[0025] Obtain the historical variance of the power generation of the AC power station and the DC power station in the search sequence that is greater than half of the power consumption of the power consumption end. Sort them according to the size of the historical variance value and arrange the power generation of the AC power station or the DC power station with the smaller historical variance result in the position close to half of the power consumption end.

[0026] Obtain the historical variance of the power generation of the AC power station and the DC power station in the search sequence that is less than half of the power consumption of the power consumption end. Sort them according to the size of the historical variance value and arrange the power generation of the AC power station or the DC power station with the smaller historical variance result in the position close to half of the power consumption end.

[0027] The sequences to be retrieved are reordered based on the historical variance.

[0028] In one embodiment of the present invention, the step of comparing the power generation of the AC power station and the DC power station in the initial sequence with half of the power consumption of the power consumption terminal, and arranging the elements in the initial sequence on both sides of half of the power consumption terminal to obtain the sequence to be retrieved, using half of the power consumption terminal as a reference, further includes:

[0029] The power generation capacity of several AC power stations and / or DC power stations in the search sequence is selected as the combined power generation capacity;

[0030] Obtain historical data on the power output of the power generation combination, calculate the historical variance of the power output of the power generation combination, and sort the historical variance of the power output of the power generation combination from smallest to largest.

[0031] Select the combined power of the power generation system that is less than the power consumption of the power consumption terminal, and obtain the corresponding power of the AC power station and / or the DC power station;

[0032] The corresponding AC power station and / or DC power station power is preferentially arranged on both sides of half of the power consumption of the power consumption terminal in the search sequence, and the search sequence is reordered.

[0033] In one embodiment of the present invention, the step of comparing the power generation of the AC power station and the DC power station in the initial sequence with half of the power consumption of the power consumption terminal, and arranging the elements in the initial sequence on both sides of half of the power consumption terminal to obtain the sequence to be retrieved, using half of the power consumption terminal as a reference, further includes:

[0034] Obtain the power consumption of each electrical device in the power-consuming terminal;

[0035] Obtain historical data for each of the electrical devices and calculate the historical variance for each electrical device;

[0036] The electrical equipment whose historical variance is less than the set value is marked as stable electrical equipment;

[0037] Calculate the total power consumption range of the stable power-consuming equipment;

[0038] Obtain historical power generation data of the AC power station and the DC power station, and calculate the historical variance of power generation of each AC power station and the DC power station;

[0039] The AC power station and / or the DC power station whose historical variance is less than the set value are marked as stable power stations;

[0040] Select the stable power stations whose total power is within the range of total power consumption of the stable power-consuming equipment, and prioritize arranging the corresponding AC power stations and / or DC power stations on both sides of half of the power consumption of the power-consuming end in the search sequence, and reorder the search sequence.

[0041] In one embodiment of the present invention, the step of acquiring historical data for each of the electrical devices and calculating the historical variance of each electrical device includes,

[0042] Acquire historical data for each of the electrical devices within a set time period;

[0043] Calculate the historical variance of each electrical device within a set time period.

[0044] In one embodiment of the present invention, the set time period includes,

[0045] One hour;

[0046] one day;

[0047] One week;

[0048] January; or,

[0049] One year.

[0050] In one embodiment of the present invention, ...

[0051] In one embodiment of the present invention, the step of comparing the power generation of the AC power station and the DC power station in the initial sequence with half of the power consumption of the power consumption terminal, and arranging the elements in the initial sequence on both sides of half of the power consumption terminal to obtain the sequence to be retrieved, using half of the power consumption terminal as a reference, further includes:

[0052] The AC power stations and DC power stations are sorted according to the difficulty of energy storage;

[0053] The AC power stations and / or DC power stations, which are more difficult to store electrical energy, are preferentially arranged on both sides of half of the power consumption of the power-consuming terminals in the search sequence, and the search sequence is reordered.

[0054] In one embodiment of the present invention, the power of the AC power station is preferentially arranged on both sides of half of the power consumption of the power consumption terminal in the search sequence, and the search sequence is reordered.

[0055] This invention selects AC and DC power stations to connect to the power grid for power supply through a control unit, keeps the sum of power consumption equal to the power generation capacity of the AC and DC power stations connected to the power grid, and stores excess power in the power station into a storage station or discards it, thus maintaining the supply and demand balance and stability of the microgrid and avoiding the adverse effects of microgrid fluctuations on residents and power facilities.

[0056] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0057] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0058] Figure 1 This is a schematic diagram of the module connection of the AC / DC microgrid collaborative control system according to an embodiment of the present invention;

[0059] Figure 2 This is a schematic diagram of the electrical connection of the control unit according to an embodiment of the present invention;

[0060] Figure 3 This is a schematic diagram of the control flow of the control unit described in one embodiment of the present invention;

[0061] Figure 4 This is a schematic diagram of a process in one embodiment of step S3 of the present invention, which selects AC power stations and DC power stations to connect to the power grid for power supply based on the sum of the power consumption of the power consumption terminals.

[0062] Figure 5 The flowchart of step S33 of this invention, which compares the power generation of the AC and DC power stations in the initial sequence with half of the power consumption at the power consumption end, and arranges the elements in the initial sequence on both sides of half of the power consumption at the power consumption end to obtain the sequence to be retrieved, is illustrated in one embodiment. Figure 1 ;

[0063] Figure 6 The step S33 of this invention involves comparing the power generation of the AC and DC power stations in the initial sequence with half of the power consumption at the power consumption end. Using half of the power consumption at the power consumption end as a benchmark, the elements in the initial sequence are arranged on both sides of half of the power consumption at the power consumption end to obtain the sequence to be retrieved. This step is illustrated in another embodiment of the flowchart. Figure 2 ;

[0064] Figure 7 The step S33 of this invention involves comparing the power generation of the AC and DC power stations in the initial sequence with half of the power consumption at the power consumption end. Using half of the power consumption at the power consumption end as a benchmark, the elements in the initial sequence are arranged on both sides of half of the power consumption at the power consumption end to obtain the sequence to be retrieved. This step is illustrated in another embodiment of the flowchart. Figure 3 ;

[0065] Figure 8 The step S33 of this invention involves comparing the power generation of the AC and DC power stations in the initial sequence with half of the power consumption at the power consumption end. Using half of the power consumption at the power consumption end as a benchmark, the elements in the initial sequence are arranged on both sides of half of the power consumption at the power consumption end to obtain the sequence to be retrieved. This step is illustrated in another embodiment of the flowchart. Figure 4 ;

[0066] Figure 9 The following is a flowchart illustrating step S3342 of the present invention, which involves acquiring historical data for each electrical device and calculating the historical variance of each electrical device, in one embodiment.

[0067] The attached diagram lists the components represented by each number as follows:

[0068] 1-AC power station, 2-DC power station, 3-Storage power station, 4-Power consumption terminal, 5-Control unit. Detailed Implementation

[0069] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0070] Microgrids need to maintain a balance between power generation and consumption during operation, but the power generation and consumption of microgrids are subject to large power fluctuations due to limitations.

[0071] Please see Figures 1 to 3 As shown, this invention provides a coordinated control system for AC / DC microgrids, which may include several AC power stations 1, several DC power stations 2, a power storage station 3, several power consumption terminals 4, and a control unit 5. The AC power stations 1 and DC power stations 2 can be collectively referred to as power generation stations. The AC power stations 1 can respectively transmit electrical energy to the power storage station 3 and the power grid, and the several DC power stations 2 can respectively transmit electrical energy to the power storage station 3 and the power grid. The power consumption terminals 4 can obtain electrical energy through the power grid. The control unit 5 can operate as follows: First, it executes step S1 to obtain the power consumption of the power consumption terminals 4. Next, it executes step S2 to obtain the power generation of the AC power stations 1 and DC power stations 2 according to their assigned numbers. Finally, it executes step S3 to select AC power stations 1 and DC power stations 2 to connect to the power grid for power supply based on the sum of the power consumption of the power consumption terminals 4. During the execution of the above steps, the sum of the power consumption is kept equal to the power generation of the AC power stations 1 and DC power stations 2 connected to the power grid. Following the above steps, a balance between power supply and consumption can be maintained. By coordinating the control of the microgrid, the problem of power quality being affected by fluctuations in power generation and consumption is effectively avoided.

[0072] Please see Figure 1 As shown, AC power station 1 may include wind power generation and micro gas turbines, DC power station 2 may include photovoltaic power generation, and energy storage station 3 may include battery energy storage and supercapacitor energy storage.

[0073] Please see Figure 2 As shown, AC power station 1, DC power station 2 and storage power station 3 are connected by AC / DC, AC / AC, DC / AC and DC / DC modules to convert voltage and current, and the direction of power flow is controlled by the bidirectional power converter in control unit 5.

[0074] Please see Figure 4As shown, in step S3, to quickly achieve power generation and consumption balance in the power grid, the rapid coordinated control and balance of the microgrid can be realized in the following way. First, step S31 can be executed to initially sort the power generation of AC power station 1 and DC power station 2 to obtain an initial sequence. Next, step S32 can be executed to insert half of the power consumption of power consumption terminal 4 into the initial sequence. Next, step S33 can be executed to compare the power generation of AC power station 1 and DC power station 2 in the initial sequence with half of the power consumption of power consumption terminal 4 in turn. Taking half of the power consumption of power consumption terminal 4 as the benchmark, the elements in the initial sequence are arranged on both sides of half of the power consumption of power consumption terminal 4 to obtain the sequence to be retrieved. Next, step S34 can be executed to sequentially select the power generation of AC power station 1 and DC power station 2 on both sides of half of the power consumption of power consumption terminal 4 in the sequence to be retrieved, and accumulate them to obtain the accumulation result, until the accumulation result is equal to or greater than the power consumption of power consumption terminal 4. Finally, step S35 can be executed. If the accumulated result is greater than the power consumption of power consumption terminal 4, the portion exceeding the power consumption of power consumption terminal 4 will be stored in the storage station 3 or abandoned. Through the above method, a rapid balance between power generation and power consumption in the microgrid can be achieved.

[0075] Please see Figure 5 As shown, to further achieve rapid coordinated control of the microgrid, step S3311 can be further executed in step S33 to sort the power generation of AC power station 1 and DC power station 2 in the search sequence that are greater than half the power consumption of power terminal 4. Next, step S3312 can be executed to sort the power generation of AC power station 1 and DC power station 2 in the search sequence that are less than half the power consumption of power terminal 4. Finally, step S3313 can be executed to reorder the search sequence according to the sorting results, sorting the power generation of AC power station 1 and DC power station 2 in the search sequence according to their numerical values. By arranging the search sequence according to power order in the above manner, the speed of coordinated control of the microgrid can be further improved and grid fluctuations can be reduced.

[0076] Please see Figure 6As shown, due to the different fluctuation levels of different power plants, the power plants with smaller fluctuations can be selected to achieve stable power supply to the power consumption terminal 4. The specific implementation steps can be carried out according to the following process: First, step S3321 can be executed to obtain historical power generation data of AC power plant 1 and DC power plant 2, and calculate the historical variance of the power generation of each AC power plant 1 and DC power plant 2. Next, step S3322 can be executed to obtain the historical variance of the power generation of AC power plant 1 and DC power plant 2 in the search sequence that is greater than half the power consumption of the power consumption terminal 4, sort them according to the size of the historical variance value, and arrange the power generation of AC power plant 1 or DC power plant 2 with the smaller historical variance result in the position closest to half the power consumption of the power consumption terminal 4. Next, step S3323 can be executed to obtain the historical variance of the power generation of AC power plant 1 and DC power plant 2 in the search sequence that is less than half the power consumption of the power consumption terminal 4, sort them according to the size of the historical variance value, and arrange the power generation of AC power plant 1 or DC power plant 2 with the smaller historical variance result in the position closest to half the power consumption of the power consumption terminal 4. Finally, step S3324 can be executed to sort the results based on the historical variance and reorder the search sequence. Power plants with smaller fluctuations are selected for priority power supply, effectively avoiding power fluctuations in the microgrid.

[0077] Please see Figure 7 As shown, power plants may be interconnected due to natural environment or other factors, meaning that individual power plants may experience significant fluctuations in power generation, but the combined power generation of several power plants can remain stable. To select such a stable combination, the following steps can be taken: First, step S3331 can be executed to select the power generation of several AC power plants 1 and / or DC power plants 2 in the search sequence as the combined power generation power. Next, step S3332 can be executed to obtain historical data of the combined power generation power, calculate the historical variance of the combined power generation power, and sort them according to the value of the historical variance of the combined power generation power from smallest to largest. Next, step S3333 can be executed to select the combined power generation power that is less than the power consumption of the power consumption terminal 4, and obtain the corresponding power of AC power plant 1 and / or DC power plant 2. Finally, step S3334 can be executed to prioritize the power of the corresponding AC power plant 1 and / or DC power plant 2 on both sides of half of the power consumption of the power consumption terminal 4 in the search sequence, and re-sort the search sequence. By selecting power plant combinations with smaller fluctuations in total power generation through the above method, and prioritizing power supply to the power consumption terminal 4, the microgrid can achieve rapid and stable power adjustment.

[0078] Please see Figure 8As shown, to improve the matching degree between the power plant and the power consumption terminal 4, step S3341 can be executed first to obtain the power consumption of each power consumption device in the power consumption terminal 4. Next, step S3342 can be executed to obtain the historical data of each power consumption device and calculate the historical variance of each device. Next, step S3343 can be executed to mark the power consumption devices with historical variances less than a set value as stable power consumption devices. Next, step S3344 can be executed to calculate the total power consumption range of the stable power consumption devices. Next, step S3345 can be executed to obtain the historical power generation data of AC power plant 1 and DC power plant 2, and calculate the historical variance of the power generation of each AC power plant 1 and DC power plant 2. Next, step S3346 can be executed to mark AC power plant 1 and / or DC power plant 2 with historical variances less than a set value as stable power plants. Finally, step S3347 can be executed to select stable power stations whose total power falls within the range of total power consumption of stable power-consuming equipment. The corresponding AC power station 1 and / or DC power station 2 are then preferentially arranged on either side of half the power consumption of power-consuming terminal 4 in the search sequence, thus reordering the search sequence. Through this method, stable combinations of power generation and consumption are matched, further improving the speed and stability of microgrid coordinated control and enhancing the robustness of the power grid.

[0079] Please see Figure 9 As shown, in step S2242, since microgrids typically generate electricity using natural energy sources such as wind power, hydropower, solar power, and / or tidal power, the periodicity of natural energy sources can be used to adjust the microgrid's coordinated control speed in order to improve this. The specific adjustment steps are as follows: First, step S33421 can be executed to obtain historical data for each electrical device within a set time period. Next, step S33422 can be executed to calculate the historical variance of each electrical device within the set time period. This method avoids the adverse fluctuations caused by the periodicity of natural energy sources on the microgrid.

[0080] The aforementioned natural cycle can be one hour, one day, one week, one month, or one year, fully considering all possible natural cycles to improve the adaptability of the microgrid.

[0081] Different power plants output electricity in various forms. For example, photovoltaic power outputs direct current (DC), which needs to be inverted before it can be connected to the microgrid for use by users and equipment. Hydropower outputs mostly alternating current (AC), which can be directly connected to the microgrid after transformation. However, storage power station 3 requires rectification and transformation operations, and there are significant losses during the rectification process. In view of the above, AC power station 1 and DC power station 2 can be sorted according to the difficulty of storing electricity. The AC power station 1 and / or DC power station 2, which are more difficult to store, are prioritized and placed on both sides of half the power consumption of the power consumption terminal 4 in the search sequence. This reorders the search sequence, prioritizing the use of electricity with greater storage difficulty, thereby improving the efficiency of electricity use.

[0082] Since AC power is difficult to store or suffers significant storage losses, the power of AC power station 1 can be prioritized and arranged on both sides of half the power consumption of power consumption terminal 4 in the search sequence. This reordering of the search sequence allows for priority use of AC power and improves the operating efficiency of the microgrid.

[0083] In summary, this invention, based on the power consumption of the power-consuming end, AC power station, and DC power station, selects AC and DC power stations to connect to the grid for power supply according to the sum of the power consumption of the power-consuming end. During this process, the sum of the power consumption is kept equal to the power generation of the AC and DC power stations connected to the grid. Ultimately, it enables coordinated control of the microgrid, avoiding mismatch or fluctuations in power generation and consumption, and effectively preventing the problem of power supply quality being affected by fluctuations in power generation and consumption.

[0084] The above description of the embodiments shown in this invention (including the content in the specification summary) is not intended to be exhaustive or to limit the invention to the precise forms disclosed herein. Although specific embodiments and examples of the invention have been described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the invention, as will be recognized and understood by those skilled in the art. As indicated, these modifications can be made to the invention in accordance with the above description of the embodiments, and such modifications will be within the spirit and scope of the invention.

[0085] This document has generally described the systems and methods in detail to aid in understanding the invention. Furthermore, various specific details have been set forth to provide a general understanding of embodiments of the invention. However, those skilled in the art will recognize that embodiments of the invention can be practiced without one or more specific details, or using other means, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the invention.

[0086] Therefore, although the invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are intended within the scope of the foregoing disclosure, and it should be understood that in some cases, certain features of the invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the invention. The invention is not intended to be limited to the specific terminology used in the following claims and / or the specific embodiments disclosed as the best mode contemplated for carrying out the invention, but the invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the invention will be defined only by the appended claims.

Claims

1. A collaborative control system for AC / DC microgrids, characterized in that, include, Several AC power stations transmit electrical energy to storage power stations and the power grid, respectively. Several DC power stations respectively transmit electrical energy to the storage power station and the power grid; and, Several power-consuming terminals obtain electrical energy through the power grid; The control unit operates in the following manner: Obtain the power consumption of the power-consuming terminal; Obtain the power generation capacity of the AC power station and the DC power station by their respective numbers; The AC power station and the DC power station are selected to be connected to the power grid for power supply based on the sum of the power consumption of the power consumption terminals, wherein the sum of the power consumption is equal to the power generation of the AC power station and the DC power station connected to the power grid for power supply; The step of selecting the AC power station and the DC power station to be connected to the power grid for power supply based on the sum of the power consumption of the power-consuming terminals includes, The power generation capacity of the AC power station and the DC power station is initially sorted to obtain an initial sequence; Insert half of the power consumption of the power-consuming terminal into the initial sequence; The power generation capacity of the AC power station and the DC power station in the initial sequence is compared with half of the power consumption capacity of the power consumption terminal. Taking half of the power consumption capacity of the power consumption terminal as a reference, the elements in the initial sequence are arranged on both sides of half of the power consumption capacity of the power consumption terminal to obtain the sequence to be retrieved. The AC power station and the DC power station on both sides of half of the power consumption of the power consumption terminal in the search sequence are selected in turn and accumulated to obtain the accumulated result until the accumulated result is equal to or greater than the power consumption of the power consumption terminal. If the accumulated result is greater than the power consumption of the power-consuming terminal, the portion exceeding the power consumption of the power-consuming terminal will be stored in the power storage station or abandoned.

2. The system according to claim 1, characterized in that, The step of comparing the power generation capacity of the AC power station and the DC power station in the initial sequence with half of the power consumption capacity of the power consumption terminal, and arranging the elements in the initial sequence on both sides of half of the power consumption capacity of the power consumption terminal to obtain the sequence to be retrieved, further includes: Sort the AC power stations and DC power stations in the search sequence whose power consumption is greater than half of the power consumption of the power consumption terminal by size; Sort the AC power stations and DC power stations in the search sequence whose power consumption is less than half of the power consumption of the power consumption terminal by size; Based on the size sorting results, the sequence to be searched is reordered, and the power generation capacity of the AC power station and the DC power station in the sequence to be searched is sorted according to the numerical value.

3. The system according to claim 1, characterized in that, The step of comparing the power generation capacity of the AC power station and the DC power station in the initial sequence with half of the power consumption capacity of the power consumption terminal, and arranging the elements in the initial sequence on both sides of half of the power consumption capacity of the power consumption terminal to obtain the sequence to be retrieved, further includes: Obtain historical power generation data of the AC power station and the DC power station, and calculate the historical variance of power generation of each AC power station and the DC power station; Obtain the historical variance of the power generation of the AC power station and the DC power station in the search sequence that is greater than half of the power consumption of the power consumption end. Sort them according to the size of the historical variance value and arrange the power generation of the AC power station or the DC power station with the smaller historical variance result in the position close to half of the power consumption end. Obtain the historical variance of the power generation of the AC power station and the DC power station in the search sequence that is less than half of the power consumption of the power consumption end. Sort them according to the size of the historical variance value and arrange the power generation of the AC power station or the DC power station with the smaller historical variance result in the position close to half of the power consumption end. The sequences to be retrieved are reordered based on the historical variance.

4. The system according to claim 1, characterized in that, The step of comparing the power generation capacity of the AC power station and the DC power station in the initial sequence with half of the power consumption capacity of the power consumption terminal, and arranging the elements in the initial sequence on both sides of half of the power consumption capacity of the power consumption terminal to obtain the sequence to be retrieved, further includes: The power generation capacity of several AC power stations and / or DC power stations in the search sequence is selected as the combined power generation capacity; Obtain historical data on the power output of the power generation combination, calculate the historical variance of the power output of the power generation combination, and sort the power output of the power generation combination from smallest to largest according to the value of the historical variance of the power output of the power generation combination; Select the combined power of the power generation system that is less than the power consumption of the power consumption terminal, and obtain the corresponding power of the AC power station and / or the DC power station; The corresponding AC power station and / or DC power station power is preferentially arranged on both sides of half of the power consumption of the power consumption terminal in the search sequence, and the search sequence is reordered.

5. The system according to claim 1, characterized in that, The step of comparing the power generation capacity of the AC power station and the DC power station in the initial sequence with half of the power consumption capacity of the power consumption terminal, and arranging the elements in the initial sequence on both sides of half of the power consumption capacity of the power consumption terminal to obtain the sequence to be retrieved, further includes: Obtain the power consumption of each electrical device in the power-consuming terminal; Obtain historical data for each of the electrical devices and calculate the historical variance for each electrical device; The electrical equipment whose historical variance is less than the set value is marked as stable electrical equipment; Calculate the total power consumption range of the stable power-consuming equipment; Obtain historical power generation data of the AC power station and the DC power station, and calculate the historical variance of power generation of each AC power station and the DC power station; The AC power station and / or the DC power station whose historical variance is less than the set value are marked as stable power stations; Select the stable power stations whose total power is within the range of total power consumption of the stable power-consuming equipment, and prioritize arranging the corresponding AC power stations and / or DC power stations on both sides of half of the power consumption of the power-consuming end in the search sequence, and reorder the search sequence.

6. The system according to claim 5, characterized in that, The steps of acquiring historical data for each electrical device and calculating the historical variance for each electrical device are as follows: include, Acquire historical data for each of the electrical devices within a set time period; Calculate the historical variance of each electrical device within a set time period.

7. The system according to claim 6, characterized in that, The set time period includes, One hour; one day; One week; January; or, One year.

8. The system according to claim 1, characterized in that, The step of comparing the power generation capacity of the AC power station and the DC power station in the initial sequence with half of the power consumption capacity of the power consumption terminal, and arranging the elements in the initial sequence on both sides of half of the power consumption capacity of the power consumption terminal to obtain the sequence to be retrieved, further includes: The AC power stations and DC power stations are sorted according to the difficulty of energy storage; The AC power stations and / or DC power stations, which are more difficult to store electrical energy, are preferentially arranged on both sides of half of the power consumption of the power-consuming terminals in the search sequence, and the search sequence is reordered.

9. The system according to claim 1 or 8, characterized in that, The power of the AC power station is preferentially arranged on both sides of half of the power consumption of the power consumption terminal in the search sequence, and the search sequence is reordered.

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