Multi-level distributed power supply admissible capacity optimization decomposition method and system

Abstract

The invention provides a multi-level distributed power supply admissible capacity optimization decomposition method and system. The method comprises the steps that the maximum admissible capacity, capable of being absorbed by a large-area power grid, of a distributed power supply is acquired according to a set-time-length production simulation result of the large-area power grid; calculating distributed power supply bearing capacity which can be accessed by each voltage level transformer substation bus of the large-area power grid; performing layer-by-layer decomposition on the maximum acceptable capacity of the distributed power supply according to the bearing capacity of each layer of the distributed power supply to obtain the acceptable capacity of each layer of the distributed power supply; wherein each level comprises a large area, a middle area, a small area and a micro area. The bearing capacity of the distributed power supply is decomposed layer by layer, so that the bearing capacity obtained through decomposition can better conform to the actual bearing capacity of the whole power grid.

Description

Technical Field

[0001] The present invention relates to the field of distributed power sources, and particularly to a method and system for optimizing and decomposing the admissible capacity of multi-level distributed power sources. Background Art

[0002] With the rapid development and increasing penetration rate of distributed photovoltaics, the problem of distributed power source consumption, especially photovoltaic power consumption, has gradually become prominent. First of all, distributed photovoltaics have caused difficulties in the regulation of the main grid, increased the difficulty of system balancing, and faced huge pressure during midday peak regulation. The output of distributed photovoltaics is concentrated in the daytime and basically zero at night peak. Its large-scale access has led to an increasingly prominent contradiction between ensuring power consumption at midday and ensuring power supply at night peak, and there is a large demand for grid peak regulation during midday. In some regions during special periods such as the Spring Festival, there is still a peak regulation gap after the conventional grid regulation means are exhausted, the power of cross-provincial and cross-regional tie lines is reduced to the lowest level, and all centralized new energy is abandoned and limited, and distributed photovoltaics are forced to take peak regulation measures.

[0003] However, the current distributed photovoltaic bearing capacity evaluation method mainly takes the safe operation of the distribution network as the boundary condition, without considering the restriction of the main grid's new energy consumption capacity. Its calculation results have exceeded the actual regulation capacity of the main grid, resulting in the grid connection of distributed new energy beyond the penetration limit, thus leading to insufficient peak regulation capacity of the main grid or the occurrence of transmission congestion. Under the background of the country's strong support for the photovoltaic industry, there are widespread phenomena of disorderly development, over-planned development, and over-expected growth of distributed photovoltaics without considering the grid bearing capacity, resulting in a large number of reverse power transmission phenomena in 220kV transformers, continuously squeezing the consumption space of centralized new energy such as photovoltaics and wind power, and further exacerbating the abandonment of wind and light of centralized new energy. Recently, the "Notice on Carrying out Pilot Projects for Evaluating the Bearing Capacity of Distributed Photovoltaic Access to the Grid and Improvement Measures" was issued, proposing to carry out pilot projects for evaluating the bearing capacity of distributed photovoltaic access to the grid and improvement measures. The proposed plan clearly shows that it is necessary to coordinate the bearing capacity of distributed photovoltaics with the main grid's regulation capacity, that is, to upgrade the bearing capacity evaluation work to a multi-level evaluation work considering the main grid's peak regulation capacity, and to promote the coordinated development of distributed photovoltaics and grid bearing capacity.

[0004] CN 112910010A, a method and device for evaluating the consumption capacity of distributed power sources in a two-stage distribution network. The proposed method and device for evaluating the consumption capacity of distributed power sources in a two-stage distribution network focus on evaluating the admissible capacity of distributed power sources within a local area through an optimized method. The implementation process requires a large amount of distribution network data and topological data, and the operation is also very complex, which is not suitable for large-scale evaluation of the bearing capacity of distributed power sources from cities to towns.

[0005] CN 114723242A A method, system and device for evaluating the carrying capacity of distributed power sources in a distribution network. The invention proposes an evaluation data model for the carrying capacity of distributed power sources in a distribution network, and the core lies in establishing an evaluation index system considering various factors.

[0006] In summary, the existing carrying capacity of distributed power sources has the drawback of not considering the absorption capacity of the main grid. Summary of the Invention

[0007] To solve the problem of the drawback that the existing carrying capacity of distributed power sources does not consider the absorption capacity of the main grid, the present invention proposes a multi-level optimization decomposition method for the admissible capacity of distributed power sources, including:

[0008] Obtaining the maximum admissible capacity of distributed power sources that the large-area power grid can absorb according to the production simulation results of the large-area power grid for a set duration;

[0009] Calculating the carrying capacity of distributed power sources that can be connected to the busbars of substations at each voltage level in the large-area power grid;

[0010] Decomposing the maximum admissible capacity of distributed power sources layer by layer according to the carrying capacity of distributed power sources at each level to obtain the admissible capacity of distributed power sources at each level;

[0011] Among them, each level includes: large area, medium area, small area and micro area.

[0012] Optionally, the decomposing the maximum admissible capacity of distributed power sources layer by layer according to the carrying capacity of distributed power sources at each level to obtain the admissible capacity of distributed power sources at each level includes:

[0013] Decomposing the maximum admissible capacity of distributed power sources to each medium area based on the carrying capacity of distributed power sources in the medium area;

[0014] Continuing to decompose the admissible capacity of distributed power sources decomposed to each medium area to small areas based on the carrying capacity of distributed power sources in the small areas;

[0015] Decomposing the admissible capacity of distributed power sources decomposed to each small area to each micro area based on the carrying capacity of distributed power sources in the micro areas.

[0016] Optionally, the decomposing the maximum admissible capacity of distributed power sources to each medium area based on the carrying capacity of distributed power sources in the medium area includes:

[0017] Directly accumulating the calculation results of the carrying capacity of distributed power sources that can be connected to the busbars of 220 kV substations under the jurisdiction of the medium area to obtain the initial value of the carrying capacity of distributed power sources at the prefecture-level city;

[0018] The net loads under typical scenarios of 220 kV substations under the jurisdiction of the medium regions in the statistics are added up to obtain the net load of the typical scenario at the prefecture-level city;

[0019] The total installed capacity of distributed power sources that the large region can carry is decomposed according to the initial value of the distributed power source carrying capacity and the net load of the typical scenario respectively, and for each medium region, the smaller value among the decomposed capacities is taken to form the secondary decomposition result of the admissible capacity of distributed power sources in the medium region;

[0020] Decompose again according to the proportion of the secondary decomposition result of the admissible capacity of distributed power sources in the medium region to form the final decomposition result of the admissible capacity of distributed power sources in the medium region.

[0021] Optionally, the final decomposition result of the admissible capacity of distributed power sources in the medium region is calculated according to the following formula:

[0022]

[0023] In the formula, is the final decomposition result of the admissible capacity of distributed power sources in the medium region, is the secondary decomposition result of the admissible capacity of distributed power sources in medium region p, R province is the maximum admissible capacity of distributed power sources that the large regional power grid can absorb, P is the number of medium regions in the large region, p and i are both the serial numbers of the medium regions, is the secondary decomposition result of the admissible capacity of distributed power sources in medium region i.

[0024] Optionally, decomposing the admissible capacity of distributed power sources decomposed to each medium region based on the distributed power source carrying capacity of the small region to the small region includes:

[0025] Directly add up the calculation results of the carrying capacity of distributed power sources that can be connected to the busbars of 110 kV substations under the jurisdiction of the small region to obtain the initial value of the distributed power source carrying capacity of the small region;

[0026] Statistically add up the net loads under typical scenarios of 110 kV substations under the jurisdiction of the small region to obtain the net load of the typical scenario of the small region;

[0027] The total installed capacity of distributed power sources that the small region can carry is decomposed according to the initial value of the distributed power source carrying capacity and the net load of the typical scenario respectively, and for each small region, the smaller value among the decomposed capacities is taken to form the secondary decomposition result of the admissible capacity of distributed power sources in the small region;

[0028] Decompose again according to the proportion of the secondary decomposition result of the admissible capacity of distributed power sources in the small region to form the final decomposition result of the admissible capacity of distributed power sources in the small region.

[0029] Optionally, the final decomposition result of the admissible capacity of distributed power sources in the small region is calculated according to the following formula:

[0030]

[0031] Wherein, is the final decomposition result of the admissible capacity of distributed power sources in small areas, is the secondary decomposition result of the admissible capacity of distributed power sources in medium areas, Q is the number of small areas within medium area p, is the final decomposition result of the admissible capacity of distributed power sources in medium areas, j is the serial number of the small area within medium area p, is the secondary decomposition result of the admissible capacity of distributed power sources in small area j within medium area p.

[0032] Optionally, decomposing the distributed power source bearing capacity based on micro-areas to the admissible capacity of distributed power sources in each small area to each micro-area includes:

[0033] Directly accumulating the calculation results of the bearing capacity of distributed power sources that can be connected to the busbars of 35kV substations under the jurisdiction of small areas to obtain the initial value of the distributed power source bearing capacity of micro-areas;

[0034] Statistically adding up the total roof resources within the areas under the jurisdiction of 35kV substations in micro-areas to obtain the total roof resources of micro-areas;

[0035] The total installed capacity of distributed power sources that can be borne by micro-areas is decomposed according to the initial value of the distributed power source bearing capacity and the total roof resources of micro-areas respectively, and the smaller value among the decomposed capacities is taken for each small area to form the secondary decomposition result of the admissible capacity of distributed power sources in micro-areas;

[0036] Decompose again according to the ratio of the secondary decomposition result of the admissible capacity of distributed power sources in micro-areas to form the final decomposition result of the admissible capacity of distributed power sources in micro-areas.

[0037] Optionally, the final decomposition result of the admissible capacity of distributed power sources in micro-areas is calculated according to the following formula:

[0038]

[0039] Wherein, is the final decomposition result of the admissible capacity of distributed power sources at the township level, is the secondary decomposition result of the admissible capacity of distributed power sources at the township level, W is the number of townships within prefecture-level city q, k is the serial number of the micro-area within small area q, is the secondary decomposition result of the admissible capacity of distributed power sources in micro-area k within small area q, is the final decomposition result of the admissible capacity of distributed power sources at the district and county level.

[0040] On the other hand, the present invention also provides a multi - level distributed power admissible capacity optimization decomposition system, including:

[0041] A data acquisition module, configured to obtain the maximum admissible capacity of distributed power that the large - area power grid can absorb according to the simulation results produced during a set time period of the large - area power grid;

[0042] A capacity calculation module, configured to calculate the bearing capacity of distributed power that can be connected to the busbars of substations at each voltage level in the large - area power grid;

[0043] A classification module, configured to layer - by - layer decompose the maximum admissible capacity of distributed power according to the bearing capacity of distributed power at each level to obtain the admissible capacity of distributed power at each level;

[0044] Wherein, each level includes: large area, medium area, small area and micro area.

[0045] Optionally, the classification module includes:

[0046] A medium - area decomposition sub - module, configured to decompose the maximum admissible capacity of distributed power to each medium area based on the bearing capacity of distributed power in the medium area;

[0047] A small - area decomposition sub - module, configured to further decompose the admissible capacity of distributed power decomposed to each medium area to the small areas based on the bearing capacity of distributed power in the small areas;

[0048] A micro - area decomposition sub - module, configured to decompose the admissible capacity of distributed power decomposed to each small area to each micro area based on the bearing capacity of distributed power in the micro areas.

[0049] Optionally, the medium - area decomposition sub - module is specifically configured to:

[0050] Directly sum up the calculation results of the bearing capacity of distributed power that can be connected to the busbars of 220kV substations under the jurisdiction of the medium area to obtain the initial value of the bearing capacity of distributed power at the prefecture - level;

[0051] Statistically sum up the net loads in typical scenarios of 220kV substations under the jurisdiction of the medium area to obtain the prefecture - level typical scenario net load;

[0052] Decompose the total installed capacity of distributed power that can be borne by the large area according to the initial value of the bearing capacity of distributed power and the typical scenario net load respectively, and for each medium area, take the smaller value of the decomposed capacities to form the secondary decomposition result of the admissible capacity of distributed power in the medium area;

[0053] Decompose again according to the proportion of the secondary decomposition result of the admissible capacity of distributed power in the medium area to form the final decomposition result of the admissible capacity of distributed power in the medium area.

[0054] Optionally, the final decomposition result of the admissible capacity of the medium - area distributed power source is calculated according to the following formula:

[0055]

[0056] In the formula, is the final decomposition result of the admissible capacity of the medium - area distributed power source, is the secondary decomposition result of the admissible capacity of the medium - area distributed power source, R province is the maximum admissible capacity of the distributed power source that the large - area power grid can absorb, P is the number of medium - areas within the large - area, and i is the serial number of the medium - area.

[0057] Optionally, the decomposition sub - module of the said cell is specifically used for:

[0058] Directly accumulate the calculation results of the bearing capacity of the distributed power source that can be connected to the busbar of the 110 kV substation under the jurisdiction of the small - area to obtain the initial value of the bearing capacity of the small - area distributed power source;

[0059] Statistically add the net loads under the typical scenarios of the 110 kV substations under the jurisdiction of the small - area to obtain the small - area typical - scenario net load;

[0060] The total installed capacity of the distributed power source that the small - area can bear is decomposed according to the initial value of the bearing capacity of the distributed power source and the typical - scenario net load respectively, and for each small - area, the smaller value among the decomposed capacities is taken to form the secondary decomposition result of the admissible capacity of the small - area distributed power source;

[0061] Decompose again according to the proportion of the secondary decomposition result of the admissible capacity of the small - area distributed power source to form the final decomposition result of the admissible capacity of the small - area distributed power source.

[0062] Optionally, the final decomposition result of the admissible capacity of the small - area distributed power source is calculated according to the following formula:

[0063]

[0064] In the formula, is the final decomposition result of the admissible capacity of the small - area distributed power source, is the secondary decomposition result of the admissible capacity of the medium - area distributed power source, Q is the number of small - areas within the medium - area p, is the final decomposition result of the admissible capacity of the medium - area distributed power source, j is the serial number of the small - area within the medium - area p, is the secondary decomposition result of the admissible capacity of the distributed power source of the small - area j within the medium - area p.

[0065] Optionally, the micro-region decomposition sub-module is specifically configured to: directly accumulate the calculation results of the distributed power carrying capacity that can be accessed by the busbars of the 35 kV substations under the jurisdiction of the small regions to obtain the initial value of the distributed power carrying capacity of the micro-region;

[0066] Statistically add up the total roof resources within the area under the jurisdiction of the 35 kV substations in the micro-region to obtain the total roof resources of the micro-region;

[0067] The total installed capacity of the distributed power that can be carried by the micro-region is decomposed according to the initial value of the distributed power carrying capacity and the total roof resources of the micro-region respectively, and for each small region, the smaller value among the decomposed capacities is taken to form the secondary decomposition result of the admissible capacity of the distributed power in the micro-region;

[0068] Decompose again according to the ratio of the secondary decomposition result of the admissible capacity of the distributed power in the micro-region to form the final decomposition result of the admissible capacity of the distributed power in the micro-region.

[0069] Optionally, the final decomposition result of the admissible capacity of the distributed power in the micro-region is calculated according to the following formula:

[0070]

[0071] In the formula, is the final decomposition result of the admissible capacity of the distributed power in the micro-region, is the secondary decomposition result of the admissible capacity of the distributed power in the micro-region, W is the number of townships in the middle region q, k is the serial number of the micro-region in the small region q, is the secondary decomposition result of the admissible capacity of the distributed power in the micro-region k in the small region q, is the final decomposition result of the admissible capacity of the distributed power in the small region.

[0072] On the other hand, the present application also provides an electronic device, including: at least one processor and a memory; the memory and the processor are connected by a bus;

[0073] The memory is used to store one or more programs;

[0074] When the one or more programs are executed by the at least one processor, the above-mentioned multi-level distributed power admissible capacity optimization decomposition method is implemented.

[0075] On the other hand, the present application also provides a readable storage medium, on which an execution program is stored, and when the execution program is executed, the above-mentioned multi-level distributed power admissible capacity optimization decomposition method is implemented.

[0076] Compared with the prior art, the beneficial effects of the present invention are:

[0077] The present invention provides an optimized decomposition method for the admissible capacity of multi-level distributed power sources, including: obtaining the maximum admissible capacity of distributed power sources that the large-area power grid can absorb according to the production simulation results of the large-area power grid for a set duration; calculating the bearing capacity of distributed power sources that can be connected to the busbars of substations at each voltage level of the large-area power grid; and layer-by-layer decomposing the maximum admissible capacity of the distributed power sources according to the bearing capacity of distributed power sources at each level to obtain the admissible capacity of distributed power sources at each level. Among them, the above-mentioned each level includes: large area, medium area, small area, and micro area. The present invention considers the bearing capacity of distributed power sources for layer-by-layer decomposition, so that the obtained bearing capacity is more in line with the actual bearing capacity of the overall power grid.

[0078] The present invention additionally considers the constraints of roof resources and load levels, realizes reasonable, fair, and sufficient decomposition of the bearing capacity, and avoids the problem of mismatch between resource endowments and installed capacity, such as rich roof resources but no available open capacity, high load levels but no distributed access. Description of the Drawings

[0079] Figure 1 It is a flowchart of an optimized decomposition method for the admissible capacity of multi-level distributed power sources of the present invention;

[0080] Figure 2 It is a detailed flowchart of decomposing the bearing capacity of provincial distributed power sources to cities in the embodiment of the present invention;

[0081] Figure 3 It is a flowchart of a method for decomposing the bearing capacity of provincial distributed power sources of the present invention;

[0082] Figure 4 It is a schematic structural diagram of an electronic device of the present invention. Detailed Embodiments

[0083] Aiming at the shortcoming that the existing bearing capacity of distributed power sources does not consider the absorption capacity of the main grid, the present invention proposes an optimized decomposition method for the admissible capacity of multi-level distributed power sources, decomposes the absorption space left by the main grid for distributed power sources according to the bearing capacity of each level, and corrects the evaluation results of the bearing capacity of each level to make it more in line with the comprehensive bearing capacity of the main and distribution grids.

[0084] At the same time, the bearing capacity of distributed power sources obtained by this method not only considers the bearing capacity of the power grid, but also considers the equipment self-constraints, roof resource constraints, and load level constraints of the equipment in the regions where each level of equipment belongs, realizes reasonable, fair, and sufficient decomposition of the bearing capacity, and avoids the problem of mismatch between resource endowments and installed capacity, such as rich roof resources but no available open capacity, high load levels but no distributed access.

[0085] In order to better understand the present invention, the content of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0086] Embodiment 1:

[0087] A multi-level distributed generation capacity optimization decomposition method, such as Figure 1 As shown, including:

[0088] Step 1: Obtain the maximum acceptable capacity of distributed power sources that can be absorbed by the large regional power grid according to the production simulation result of the large regional power grid setting time;

[0089] Step 2: Calculate the distributed power generation capacity that can be connected to the busbars of substations of various voltage levels in the large regional power grid;

[0090] Step 3: Decompose the maximum acceptable capacity of the distributed power source layer by layer according to the carrying capacity of the distributed power sources at each level to obtain the acceptable capacity of the distributed power sources at each level;

[0091] The various levels include: large area, medium area, small area and micro area.

[0092] Taking the provincial power grid as a large area, the prefecture-level power grid as a medium area, the district-county level as a small area, and the township level as a micro area as an example, the following steps are further introduced:

[0093] Step 1: According to the large-area power grid setting time production simulation results, the maximum acceptable capacity of distributed power sources that can be absorbed by the large-area power grid is obtained, as follows:

[0094] 1. Based on the annual production simulation results of the provincial power grid, obtain the maximum acceptable capacity of distributed power sources that the provincial power grid can absorb.

[0095] Step 2: Calculate the distributed power capacity that can be connected to the busbars of substations of various voltage levels in the large regional power grid. The details are as follows:

[0096] 2. Calculate the distributed power supply carrying capacity that can be connected to the busbars of substations of various voltage levels of the provincial power grid from 220kV to 35kV.

[0097] Step 3: Decompose the maximum acceptable capacity of the distributed power source layer by layer according to the carrying capacity of the distributed power sources at each level to obtain the acceptable capacity of the distributed power sources at each level, including:

[0098] Decomposing the maximum acceptable capacity of the distributed power source into each middle area based on the distributed power source carrying capacity of the middle area;

[0099] Based on the carrying capacity of distributed power sources in small areas, the distributed power sources in each medium area can be further decomposed into small areas;

[0100] The distributed power capacity based on micro - regions decomposes the admissible capacity of distributed power sources in each small region to each micro - region.

[0101] Furthermore, the distributed power capacity based on medium - regions decomposes the maximum admissible capacity of distributed power sources to each medium - region, including:

[0102] Directly sum up the calculation results of the distributed power - carrying capacity that can be connected to the busbars of 220kV substations under the jurisdiction of the medium - region to obtain the initial value of the distributed power - carrying capacity at the prefecture - level;

[0103] Statistically sum up the net loads in the typical scenarios of 220kV substations under the jurisdiction of the medium - region to obtain the net load of the typical scenario at the prefecture - level;

[0104] The total installed capacity of distributed power sources that can be carried by the large - region is decomposed respectively according to the initial value of the distributed power - carrying capacity and the net load of the typical scenario, and for each medium - region, take the smaller value of the decomposed capacities to form the secondary decomposition result of the admissible capacity of distributed power sources in the medium - region;

[0105] Decompose again according to the proportion of the secondary decomposition result of the admissible capacity of distributed power sources in the medium - region to form the final decomposition result of the admissible capacity of distributed power sources in the medium - region.

[0106] Furthermore, the final decomposition result of the admissible capacity of distributed power sources in the medium - region is calculated according to the following formula:

[0107]

[0108] In the formula, is the final decomposition result of the admissible capacity of distributed power sources in the medium - region, is the secondary decomposition result of the admissible capacity of distributed power sources in the medium - region, R province is the maximum admissible capacity of distributed power sources that can be absorbed by the large - region power grid, P is the number of medium - regions in the large - region, and i is the serial number of the medium - region.

[0109] Furthermore, the distributed power capacity based on small - regions decomposes the admissible capacity of distributed power sources in each medium - region to each small - region, including:

[0110] Directly sum up the calculation results of the distributed power - carrying capacity that can be connected to the busbars of 110kV substations under the jurisdiction of the small - region to obtain the initial value of the distributed power - carrying capacity in the small - region;

[0111] Statistically sum up the net loads in the typical scenarios of 110kV substations under the jurisdiction of the small - region to obtain the net load of the typical scenario in the small - region;

[0112] The total installed capacity of distributed power sources that can be carried by small areas is decomposed according to the initial value of the distributed power source carrying capacity and the net load of typical scenarios respectively, and for each small area, the smaller value of the decomposed capacities is taken to form the secondary decomposition result of the admissible capacity of distributed power sources in small areas;

[0113] Decompose again according to the proportion of the secondary decomposition result of the admissible capacity of distributed power sources in small areas to form the final decomposition result of the admissible capacity of distributed power sources in small areas.

[0114] Furthermore, the final decomposition result of the admissible capacity of distributed power sources in small areas is calculated according to the following formula:

[0115]

[0116] In the formula, is the final decomposition result of the admissible capacity of distributed power sources in small areas, is the secondary decomposition result of the admissible capacity of distributed power sources in medium areas, Q is the number of small areas in medium area p, is the final decomposition result of the admissible capacity of distributed power sources in medium areas, j is the serial number of the small area in medium area p, is the secondary decomposition result of the admissible capacity of distributed power sources in small area j in medium area p.

[0117] Furthermore, the admissible capacity of distributed power sources that is decomposed to each small area based on the distributed power source carrying capacity of micro areas is further decomposed to each micro area, including:

[0118] Directly accumulate the calculation results of the carrying capacity of distributed power sources that can be connected to the busbars of 35kV substations under the jurisdiction of small areas to obtain the initial value of the carrying capacity of distributed power sources in micro areas;

[0119] Statistically add up the total roof resources within the areas under the jurisdiction of 35kV substations under the jurisdiction of micro areas to obtain the total roof resources of micro areas;

[0120] The total installed capacity of distributed power sources that can be carried by micro areas is decomposed according to the initial value of the distributed power source carrying capacity and the total roof resources of micro areas respectively, and for each small area, the smaller value of the decomposed capacities is taken to form the secondary decomposition result of the admissible capacity of distributed power sources in micro areas;

[0121] Decompose again according to the proportion of the secondary decomposition result of the admissible capacity of distributed power sources in micro areas to form the final decomposition result of the admissible capacity of distributed power sources in micro areas.

[0122] Furthermore, the final decomposition result of the admissible capacity of distributed power sources in micro areas is calculated according to the following formula:

[0123]

[0124] In the formula, is the final decomposition result of the admissible capacity of distributed power sources in the micro-region, is the secondary decomposition result of the admissible capacity of distributed power sources in the micro-region, W is the number of towns in the medium-region q, and k is the serial number of the micro-region in the small-region q. is the secondary decomposition result of the admissible capacity of distributed power sources in the micro-region k in the small-region q, is the final decomposition result of the admissible capacity of distributed power sources in the small-region.

[0125] The specific implementation steps of Step 3 are as follows: Taking the province as the large-region, the city as the medium-region, the county as the small-region, and the town as the micro-region, the technical solution of the present invention will be further introduced as shown in Figure 2 and Figure 3 shown.

[0126] 3. Decompose the maximum admissible capacity of provincial distributed power sources to each city:

[0127] 3.1 Directly sum up the calculation results of the bearing capacity of distributed power sources that can be connected to the busbars of 220 kV substations under the jurisdiction of the city to obtain the initial value of the bearing capacity of distributed power sources at the city level:

[0128]

[0129] Among them, is the initial value of the bearing capacity of distributed power sources in city p, is the bearing capacity of distributed power sources in the area under the jurisdiction of 220 kV substation i.

[0130] 3.2 Statistically sum up the net loads under typical scenarios of 220 kV substations under the jurisdiction of the city to obtain the net load of the typical scenario at the city level

[0131]

[0132] Among them, is the net load of city p, is the net load of the area under the jurisdiction of 220 kV substation i.

[0133] 3.3 Decompose the total installed capacity of distributed power sources that can be borne by the whole province according to the initial value of the bearing capacity of distributed power sources and the net load of the typical scenario respectively, and take the smaller value of the decomposed capacity for each city to form the secondary decomposition result of the admissible capacity of distributed power sources at the city level.

[0134]

[0135] Among them, is the secondary decomposition result of the admissible capacity of distributed power sources at the city level, R provinceis the maximum admissible capacity of distributed power sources that can be absorbed by the provincial power grid, P is the number of cities in the province, is the initial value of the bearing capacity of distributed power sources in city i, is the net load of city i.

[0136] 3.4 Decompose again according to the ratio of the secondary decomposition results to form the final decomposition result of the admissible capacity of distributed power sources at the prefecture-level city.

[0137]

[0138] is the final decomposition result of the admissible capacity of distributed power sources at the prefecture-level city.

[0139] 4. Continue to decompose the admissible capacity of distributed power sources at the prefecture-level city to each district and county:

[0140] 4.1 Directly sum up the calculation results of the bearing capacity of distributed power sources that can be connected to the busbars of 110kV substations under the jurisdiction of the district and county to obtain the initial value of the bearing capacity of distributed power sources at the district and county level:

[0141]

[0142] Among them, is the initial value of the bearing capacity of distributed power sources in city q, is the bearing capacity of distributed power sources in the area under the jurisdiction of 110kV substation i.

[0143] 4.2 Statistically sum up the net loads under typical scenarios of 110kV substations under the jurisdiction of the district and county to obtain the net load of the district and county under the typical scenario.

[0144]

[0145] Among them, is the net load of district and county q, is the net load of the area under the jurisdiction of 110kV substation i.

[0146] 4.3 Decompose the total installed capacity of distributed power sources that can be borne by the prefecture-level city according to the initial value of the bearing capacity of distributed power sources and the net load under the typical scenario respectively, and take the smaller value of the decomposed capacity for each district and county to form the secondary decomposition result of the admissible capacity of distributed power sources at the district and county level.

[0147]

[0148] Among them, is the secondary decomposition result of the admissible capacity of distributed power sources at the prefecture-level city, Q is the number of districts and counties in prefecture-level city p, is the initial value of the bearing capacity of distributed power sources in district and county j, is the net load of district / county j, where j is the serial number of the small area, i.e., the serial number of the district / county.

[0149] 4.4 Decompose again according to the ratio of the secondary decomposition result to form the final decomposition result of the admissible capacity of distributed power sources at the district / county level.

[0150]

[0151] In the formula, is the final decomposition result of the admissible capacity of distributed power sources in the small area, is the secondary decomposition result of the admissible capacity of distributed power sources in the medium area, Q is the number of small areas in medium area p, i.e., the number of districts / counties, is the final decomposition result of the admissible capacity of distributed power sources in the medium area, j is the serial number of the small area in medium area p, i.e., the serial number of the district / county, is the secondary decomposition result of the admissible capacity of distributed power sources of small area j in medium area p.

[0152] 5. Decompose the admissible capacity of distributed power sources at the district / county level to the township level:

[0153] 5.1 Directly sum up the calculation results of the carrying capacity of distributed power sources that can be connected to the busbars of 35kV substations under the jurisdiction of the district / county to obtain the initial value of the carrying capacity of distributed power sources at the district / county level:

[0154]

[0155] Among them, is the initial value of the carrying capacity of distributed power sources in township w, is the carrying capacity of distributed power sources in the area under the jurisdiction of 35kV substation k.

[0156] 5.2 Statistically sum up the total amount of rooftop resources in the areas under the jurisdiction of 35kV substations under the jurisdiction of the township to obtain the total amount of rooftop resources at the township level.

[0157]

[0158] Among them, is the total amount of rooftop resources in township w, is the total amount of rooftop resources in the area under the jurisdiction of 35kV substation k.

[0159] 5.3 The total installed capacity of distributed power sources that the township can carry is decomposed respectively according to the initial value of the carrying capacity of distributed power sources and the total amount of rooftop resources in the township, and for each district / county, take the smaller value among the decomposed capacities to form the secondary decomposition result of the admissible capacity of distributed power sources at the district / county level.

[0160]

[0161] Among them, It is the secondary decomposition result of the acceptable capacity of distributed power sources at the township level. W is the number of townships in prefecture-level city q, is the initial value of the bearing capacity of distributed power sources in township k, is the total amount of rooftop resources in township k.

[0162] 5.4 Decompose again according to the ratio of the secondary decomposition result to form the final decomposition result of the acceptable capacity of distributed power sources at the township level.

[0163]

[0164] In the formula, is the final decomposition result of the acceptable capacity of distributed power sources at the township level (micro-region), is the secondary decomposition result of the acceptable capacity of distributed power sources at the township level (micro-region). W is the number of townships in prefecture-level city (medium-region) q, and k is the serial number of the micro-region in small-region q, is the secondary decomposition result of the acceptable capacity of distributed power sources in township (micro-region) k in district / county-level (small-region) q, is the final decomposition result of the acceptable capacity of distributed power sources at the district / county level (small-region).

[0165] Embodiment 2

[0166] In this embodiment, the present invention is specifically introduced with the province as the large region, the prefecture-level city as the medium region, the district / county as the small region, and the township as the micro-region. The maximum acceptable capacity of distributed power sources that the main grid of a certain province can absorb is 19767 MW.

[0167] 1) Decomposition result of the acceptable capacity at the prefecture-level city

[0168] Carry out the decomposition of the bearing capacity of distributed power sources at the prefecture-level city, and focus on decomposing according to the initial value of the bearing capacity analysis and the net load of the typical scenario, as shown in Table 1.

[0169] Table 1

[0170]

[0171] 2) Decomposition result of the bearing capacity at the district / county level

[0172] Carry out the decomposition of the bearing capacity of distributed power sources at the district / county level (taking City A6 as an example, 368.55 MW), and focus on decomposing according to the initial value of the bearing capacity analysis and the net load of the typical scenario, as shown in Table 2.

[0173] Table 2

[0174]

[0175]

[0176] 3) Example of the Decomposition Result of Township-level Carrying Capacity

[0177] Carry out the decomposition of the distributed photovoltaic carrying capacity at the township level (taking Area B1 as an example, 180.85 MW), and focus on decomposing according to the initial value of the carrying capacity analysis and the available roof area of each district and county. (Due to the lack of the initial value of the township-level carrying capacity analysis, the capacity of the township 220 kV transformer is temporarily used for example calculation here), as shown in Table 3.

[0178] Table 3

[0179]

[0180] Embodiment 3

[0181] Based on the same inventive concept, the present invention also provides a multi-level distributed power source admissible capacity optimization decomposition system, including:

[0182] A data acquisition module, configured to obtain the maximum admissible capacity of the distributed power source that the large-area power grid can absorb according to the simulation results produced by the large-area power grid for a set duration;

[0183] A capacity calculation module, configured to calculate the carrying capacity of the distributed power source that can be connected to the busbars of substations at each voltage level of the large-area power grid;

[0184] A grading module, configured to decompose the maximum admissible capacity of the distributed power source layer by layer according to the carrying capacity of the distributed power source at each level to obtain the admissible capacity of the distributed power source at each level;

[0185] Among them, each level includes: large area, medium area, small area, and micro area.

[0186] Optionally, the grading module includes:

[0187] A medium area decomposition sub-module, configured to decompose the maximum admissible capacity of the distributed power source to each medium area based on the carrying capacity of the distributed power source in the medium area;

[0188] A small area decomposition sub-module, configured to further decompose the admissible capacity of the distributed power source decomposed to each medium area to the small area based on the carrying capacity of the distributed power source in the small area;

[0189] A micro area decomposition sub-module, configured to decompose the admissible capacity of the distributed power source decomposed to each small area to each micro area based on the carrying capacity of the distributed power source in the micro area.

[0190] Optionally, the medium area decomposition sub-module is specifically configured to:

[0191] Directly accumulate the calculation results of the carrying capacity of the distributed power source that can be connected to the busbars of the 220 kV substations under the jurisdiction of the medium area to obtain the initial value of the carrying capacity of the distributed power source at the prefecture-level city;

[0192] The net loads under typical scenarios of the 220 kV substations within the regions in the statistics are added up to obtain the net load of the typical scenario at the prefecture level;

[0193] The total installed capacity of distributed power sources that can be carried by the large region is decomposed respectively according to the initial value of the distributed power source carrying capacity and the net load of the typical scenario, and for each medium region, the smaller value among the decomposed capacities is taken to form the secondary decomposition result of the admissible capacity of distributed power sources in the medium region;

[0194] Decompose again according to the proportion of the secondary decomposition result of the admissible capacity of distributed power sources in the medium region to form the final decomposition result of the admissible capacity of distributed power sources in the medium region.

[0195] Optionally, the final decomposition result of the admissible capacity of distributed power sources in the medium region is calculated according to the following formula:

[0196]

[0197] In the formula, is the final decomposition result of the admissible capacity of distributed power sources in the medium region, is the secondary decomposition result of the admissible capacity of distributed power sources in the medium region, R province is the maximum admissible capacity of distributed power sources that can be absorbed by the large regional power grid, P is the number of medium regions within the large region, and i is the serial number of the medium region.

[0198] Optionally, the decomposition sub-module of the community is specifically used for:

[0199] Directly add up the calculation results of the carrying capacity of distributed power sources that can be connected to the busbars of the 110 kV substations within the small region to obtain the initial value of the carrying capacity of distributed power sources in the small region;

[0200] Statistically add up the net loads under typical scenarios of the 110 kV substations within the small region to obtain the net load of the typical scenario in the small region;

[0201] The total installed capacity of distributed power sources that can be carried by the small region is decomposed respectively according to the initial value of the distributed power source carrying capacity and the net load of the typical scenario, and for each small region, the smaller value among the decomposed capacities is taken to form the secondary decomposition result of the admissible capacity of distributed power sources in the small region;

[0202] Decompose again according to the proportion of the secondary decomposition result of the admissible capacity of distributed power sources in the small region to form the final decomposition result of the admissible capacity of distributed power sources in the small region.

[0203] Optionally, the final decomposition result of the admissible capacity of distributed power sources in the small region is calculated according to the following formula:

[0204]

[0205] In the formula, is the final decomposition result of the admissible capacity of distributed power sources in small areas, is the secondary decomposition result of the admissible capacity of distributed power sources in medium areas, Q is the number of small areas within medium area p, is the final decomposition result of the admissible capacity of distributed power sources in medium areas, j is the serial number of the small area within medium area p, is the secondary decomposition result of the admissible capacity of distributed power sources in small area j within medium area p.

[0206] Optionally, the micro-area decomposition sub-module is specifically used for: directly accumulating the calculation results of the bearing capacity of distributed power sources that can be connected to the busbars of 35kV substations under the jurisdiction of small areas to obtain the initial value of the bearing capacity of distributed power sources in the micro-area;

[0207] Counting the total amount of roof resources within the area under the jurisdiction of 35kV substations in the micro-area and adding them up to obtain the total amount of roof resources in the micro-area;

[0208] The total installed capacity of distributed power sources that can be borne by the micro-area is decomposed according to the initial value of the bearing capacity of distributed power sources and the total amount of roof resources in the micro-area respectively, and for each small area, the smaller value among the decomposed capacities is taken to form the secondary decomposition result of the admissible capacity of distributed power sources in the micro-area:

[0209] Decompose again according to the ratio of the secondary decomposition result of the admissible capacity of distributed power sources in the micro-area to form the final decomposition result of the admissible capacity of distributed power sources in the micro-area.

[0210] Optionally, the final decomposition result of the admissible capacity of distributed power sources in the micro-area is calculated according to the following formula:

[0211]

[0212] In the formula, is the final decomposition result of the admissible capacity of distributed power sources in the micro-area, is the secondary decomposition result of the admissible capacity of distributed power sources in the micro-area, W is the number of townships within medium area q, k is the serial number of the micro-area within small area q, is the secondary decomposition result of the admissible capacity of distributed power sources in micro-area k within small area q, is the final decomposition result of the admissible capacity of distributed power sources in small areas.

[0213] Embodiment 4

[0214] As Figure 4As shown, the present invention also provides an electronic device, which may be a computer device, a single-chip microcomputer device, a smart mobile device, etc. The electronic device in this embodiment may include a processor, a memory, a transceiver component, etc. The memory, the processor, and the transceiver component are connected through a bus; the memory can be used to store an execution program, and an exemplary execution program may include instructions; the processor is used to execute the instructions stored in the memory. The memory can also be used to store data, and this data can be called and / or modified when the instructions are executed.

[0215] The processor may be a Central Processing Unit (CPU), or may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, and is suitable for implementing one or more instructions. Specifically, it is suitable for loading and executing one or more instructions in the storage medium to implement the corresponding method flow or corresponding function, so as to implement the steps of a multi-level distributed power admissible capacity optimization decomposition method in the above embodiment.

[0216] Embodiment 5

[0217] Based on the same inventive concept, the present invention also provides a readable storage medium, specifically an electronic device-readable storage medium (Memory). The electronic device-readable storage medium is a memory device in the electronic device and is used to store programs and data. It can be understood that the storage medium here can include both the built-in storage medium in the electronic device and, of course, the extended storage medium supported by the electronic device. The storage medium provides a storage space, and the operating system of the terminal is stored in this storage space. And, one or more instructions suitable for being loaded and executed by the processor are also stored in this storage space. These instructions can be one or more execution programs (including program codes). It should be noted that the storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. By the processor loading and executing one or more instructions stored in the storage medium, the steps of a multi-level distributed power admissible capacity optimization decomposition method in the above embodiment can be implemented.

[0218] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memory, CD-ROM, optical memory, etc.) that contain computer-usable program code.

[0219] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of flows and / or blocks in the flowchart and / or block diagram, can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate means for realizing the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0220] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including instruction means, and the instruction means realizes the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0221] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Therefore, the instructions executed on the computer or other programmable device provide steps for realizing the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0222] The above are only embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention pending approval.

Claims

1. A method for optimizing and decomposing the acceptable capacity of multi-level distributed power sources, characterized in that: include: According to the production simulation result of the large regional power grid setting time, the maximum acceptable capacity of the distributed power source that can be absorbed by the large regional power grid is obtained; Calculate the distributed power capacity that can be connected to the busbars of substations of various voltage levels in large regional power grids; Decomposing the maximum acceptable capacity of the distributed power source layer by layer according to the carrying capacity of the distributed power sources at each level, to obtain the acceptable capacity of the distributed power sources at each level; The various levels include: large area, medium area, small area and micro area.

2. The method according to claim 1, characterized in that The maximum acceptable capacity of the distributed power source is decomposed layer by layer according to the carrying capacity of the distributed power sources at each level to obtain the acceptable capacity of the distributed power sources at each level, including: Decomposing the maximum acceptable capacity of the distributed power source into each middle area based on the distributed power source carrying capacity of the middle area; Based on the carrying capacity of distributed power sources in small areas, the distributed power sources in each medium area can be further decomposed into small areas; The distributed power generation carrying capacity based on micro-areas will decompose the acceptable capacity of distributed power generation in each small area into each micro-area.

3. The method according to claim 2, characterized in that The distributed power source carrying capacity based on the middle area decomposes the maximum acceptable capacity of the distributed power source into each middle area, including: The calculation results of the distributed power supply carrying capacity that can be connected to the busbar of the 220kV substation in the central region are directly accumulated to obtain the initial value of the distributed power supply carrying capacity at the municipal level; The net load of typical scenarios of 220kV substations in the statistical region is added together to obtain the net load of typical scenarios at the prefecture-level; The total installed capacity of distributed power sources that can be carried by the large region is decomposed according to the initial value of the distributed power source carrying capacity and the net load of the typical scenario, and the smaller value of the decomposed capacity is taken for each medium region to form the secondary decomposition result of the acceptable capacity of the distributed power sources in the medium region; The acceptable capacity of distributed power generation in the central region is decomposed again according to the proportion of the secondary decomposition result to form the final decomposition result of the acceptable capacity of distributed power generation in the central region.

4. The method according to claim 3, characterized in that The final decomposition result of the acceptable capacity of the regional distributed power generation is calculated as follows: In the formula, It is the final decomposition result of the acceptable capacity of distributed power generation in the central region. is the secondary decomposition result of the acceptable capacity of distributed generation in region p, R province is the maximum acceptable capacity of distributed power sources that can be absorbed by the large regional power grid, P is the number of medium areas in the large area, and p and i are the serial numbers of the medium areas. It is the secondary decomposition result of the acceptable capacity of distributed generation in region i.

5. The method according to claim 2, characterized in that The distributed power generation carrying capacity based on small areas will be decomposed into the distributed power generation capacity of each medium area and further decomposed into small areas, including: The calculation results of the distributed power supply carrying capacity that can be connected to the 110kV substation busbar in the small area are directly accumulated to obtain the initial value of the distributed power supply carrying capacity in the small area; The net load of the typical scenario of the small area is obtained by adding up the net loads of the 110kV substations in the small area; The total installed capacity of distributed power sources that can be carried by a small area is decomposed according to the initial value of the distributed power source carrying capacity and the net load of the typical scenario, and the smaller value of the decomposed capacity is taken for each small area to form the secondary decomposition result of the acceptable capacity of distributed power sources in the small area; The acceptable capacity of distributed power sources in small areas is decomposed again according to the proportion of the secondary decomposition result to form the final decomposition result of the acceptable capacity of distributed power sources in small areas.

6. The method according to claim 5, characterized in that The final decomposition result of the acceptable capacity of the distributed power generation in the small area is calculated as follows: In the formula, It is the final decomposition result of the acceptable capacity of distributed power generation in small areas. is the secondary decomposition result of the acceptable capacity of distributed generation in the middle area, Q is the number of small areas in the middle area p, is the final decomposition result of the acceptable capacity of the distributed generation in the middle area, j is the serial number of the small area in the middle area p, It is the secondary decomposition result of the acceptable capacity of distributed generation in small area j within middle area p.

7. The method according to claim 2, characterized in that The distributed power supply carrying capacity based on micro-areas decomposes the acceptable capacity of the distributed power supply in each small area into each micro-area, including: The calculation results of the distributed power carrying capacity that can be connected to the busbar of the 35kV substation in the small area are directly accumulated to obtain the initial value of the distributed power carrying capacity of the micro-area; The total amount of rooftop resources in the area under the jurisdiction of the 35kV substation in the micro-region is calculated by adding the total amount of rooftop resources in the area under the jurisdiction of the micro-region; The total installed capacity of distributed power sources that can be carried by the micro-region is decomposed according to the initial value of the distributed power carrying capacity and the total amount of rooftop resources in the micro-region, and the smaller value of the decomposed capacity is taken for each small region to form the secondary decomposition result of the acceptable capacity of distributed power sources in the micro-region; The micro-regional distributed power generation capacity can be decomposed again according to the proportion of the secondary decomposition result to form the final decomposition result of the micro-regional distributed power generation capacity.

8. The method according to claim 7, characterized in that The final decomposition result of the acceptable capacity of the micro-area distributed power source is calculated as follows: In the formula, It is the final decomposition result of the acceptable capacity of micro-area distributed power generation. is the secondary decomposition result of the acceptable capacity of micro-regional distributed power generation, W is the number of towns in the middle region q, k is the serial number of the micro-region in the small region q, is the secondary decomposition result of the acceptable capacity of distributed generation in micro-area k within small area q, It is the final decomposition result of the acceptable capacity of distributed power sources in small areas.

9. A multi-level distributed power supply acceptable capacity optimization decomposition system, characterized in that: include: A data acquisition module, used for acquiring the maximum acceptable capacity of distributed power sources that can be absorbed by the large regional power grid according to the production simulation result of the large regional power grid setting time; Capacity calculation module, used to calculate the carrying capacity of distributed power sources that can be connected to the busbars of substations of various voltage levels in large regional power grids; A grading module, used to decompose the maximum acceptable capacity of the distributed power source layer by layer according to the carrying capacity of the distributed power sources at each level, so as to obtain the acceptable capacity of the distributed power sources at each level; The various levels include: large area, medium area, small area and micro area.

10. An electronic device, characterized in that: include: at least one processor and memory; The memory and the processor are connected via a bus; The memory is used to store one or more programs; When the one or more programs are executed by the at least one processor, a method for optimizing decomposition of acceptable capacity of a multi-level distributed power source as described in any one of claims 1 to 8 is implemented.

11. A readable storage medium, characterized in that: An execution program is stored thereon, and when the execution program is executed, a method for optimizing and decomposing the acceptable capacity of a multi-level distributed power source as described in any one of claims 1 to 8 is implemented.

Images