Method, device, medium and equipment for adjusting distributed photovoltaic open capacity

Abstract

The method, apparatus, medium, and equipment for adjusting the available capacity of distributed photovoltaic (PV) power generation (PV) systems provided in this application include: obtaining the on-transit PV capacity and minimum load of a 220kV substation; calculating the first available capacity of the 220kV substation based on the on-transit PV capacity and minimum load; and obtaining the second available capacity of a downstream substation. The downstream substation receives power from the 220kV substation. The target available capacity of the downstream substation is adjusted based on the first and second available capacities. The first available capacity of the 220kV substation can be obtained from the on-transit PV capacity and minimum load. Furthermore, the target available capacity of the downstream substation is adjusted based on the second and first available capacities.

Description

Technical Field

[0001] This application relates to the field of adjustable capacity technology, specifically to methods, apparatus, media and equipment for adjusting the adjustable capacity of distributed photovoltaic systems. Background Technology

[0002] The coordinated planning of generation, transmission, distribution, and consumption, as well as the coordinated planning of sources, grids, loads, and storage, along with the optimized allocation of various flexible resources through multi-energy complementarity, is an inevitable trend in building a new power system with new energy sources as the mainstay. The large-scale integration of distributed power sources, especially the imperfect management of low-voltage distributed integration, has led to numerous problems, including reverse overload of distribution transformers, voltage fluctuations exceeding limits in distribution areas, harmonic pollution, and excessively high line loss rates. To standardize the integration of distributed photovoltaic (PV) power generation, grid companies are required to provide information on the available capacity of distributed PV power generation to guide investment in new energy power generation and thus ensure the safe operation of the grid. However, current technologies do not consider factors such as the safe operation verification of main transformers, the topology verification of transmission and distribution networks, the already connected PV capacity, the PV capacity en route, and the minimum load in calculating the available capacity of distributed PV power generation, resulting in inaccurate calculation results. Summary of the Invention

[0003] To address the aforementioned technical problems, this application is proposed. Embodiments of this application provide a method, apparatus, medium, and device for adjusting the available capacity of distributed photovoltaic (PV) systems, thereby improving the accuracy of calculating the available capacity of distributed PV systems.

[0004] According to one aspect of this application, a method for adjusting the available capacity of distributed photovoltaic power generation is provided, comprising:

[0005] Obtain the photovoltaic capacity in transit corresponding to the 220kV substation and the minimum load of the 220kV substation;

[0006] Based on the photovoltaic capacity in transit corresponding to the 220kV substation and the minimum load of the 220kV substation, the first open capacity of the 220kV substation is calculated.

[0007] Obtain the second available capacity corresponding to the lower-level substation; wherein, the lower-level substation receives power provided by the 220kV substation;

[0008] The target available capacity of the lower-level substation is adjusted based on the first available capacity and the second available capacity.

[0009] In one embodiment, calculating the first available capacity of the 220kV substation based on the photovoltaic capacity in transit corresponding to the 220kV substation and the minimum load of the 220kV substation includes:

[0010] Based on the photovoltaic capacity in transit corresponding to the 220kV substation and the minimum load of the 220kV substation, the first available capacity of the 220kV substation is calculated; wherein, the calculation formula for the first available capacity of the 220kV substation is: For the minimum load of a 220kV substation, W p This refers to the photovoltaic capacity in transit of the 220kV substation.

[0011] In one embodiment, the lower-level substation is a 110kV substation, wherein obtaining the second available capacity corresponding to the lower-level substation includes:

[0012] The total capacity of the 110kV substation, the maximum value of the main transformer capacity of the 110kV substation, the photovoltaic capacity in transit of the 110kV substation, and the minimum load of the 110kV substation are obtained.

[0013] The second available capacity of the lower-level substation is calculated based on the total capacity of the 110kV substation, the maximum capacity of the main transformer of the 110kV substation, the photovoltaic capacity in transit of the 110kV substation, and the minimum load of the 110kV substation.

[0014] In one embodiment, the calculation of the second available capacity corresponding to the lower-level substation based on the total capacity of the 110kV substation, the maximum capacity of the main transformer of the 110kV substation, the photovoltaic capacity in transit of the 110kV substation, and the minimum load of the 110kV substation includes:

[0015] Based on the total capacity of the 110kV substation, the maximum capacity of the main transformer of the 110kV substation, the photovoltaic capacity in transit of the 110kV substation, and the minimum load of the 110kV substation, the second available capacity corresponding to the lower-level substation is calculated; wherein, the calculation formula for the second available capacity includes: Among them, S Sb This refers to the total capacity of the 110kV substation. W represents the maximum capacity of the main transformer in a 110kV substation. p This refers to the photovoltaic capacity in transit of the 110kV substation. This is the minimum load of the 110kV substation.

[0016] In one embodiment, the method for adjusting the available capacity of distributed photovoltaic power generation further includes:

[0017] If the capacity of each transformer in the 110kV substation is less than or equal to the preset capacity threshold, then the substation rated capacity of the transformer is obtained.

[0018] The available capacity of the transformer is calculated based on the substation's rated capacity, the photovoltaic capacity in transit of the transformer, and the transformer's minimum load.

[0019] In one embodiment, calculating the available capacity of the transformer based on the substation rated capacity, the photovoltaic capacity in transit, and the minimum load of the transformer includes:

[0020] Based on the substation rated capacity of the transformer, the photovoltaic capacity in transit of the transformer, and the minimum load of the transformer, the available capacity corresponding to the transformer is calculated; wherein, the calculation formula for the available capacity corresponding to the transformer is as follows: S represents the minimum load of the transformer. Tr W represents the rated capacity of the 110kV transformer. p The photovoltaic capacity in transit of the transformer is given.

[0021] In one embodiment, the second available capacity is multiple, wherein adjusting the target available capacity of the downstream transformer based on the first available capacity and the second available capacity includes:

[0022] Calculate the sum of multiple second-openable capacities;

[0023] If the sum of the plurality of second openable capacities is greater than the first openable capacity, then the second openable capacity of the lower-level transformer is reduced to obtain the target openable capacity.

[0024] According to another aspect of this application, a device for adjusting the open capacity of distributed photovoltaic systems is provided, characterized in that it comprises:

[0025] The first acquisition module is used to acquire the photovoltaic capacity in transit corresponding to the 220kV substation and the minimum load of the 220kV substation;

[0026] The calculation module is used to calculate the first open capacity of the 220kV substation based on the photovoltaic capacity in transit corresponding to the 220kV substation and the minimum load of the 220kV substation.

[0027] The second acquisition module is used to acquire the second available capacity corresponding to the lower-level substation; wherein the lower-level substation receives power provided by the 220kV substation;

[0028] The adjustment module is used to adjust the target available capacity of the lower-level substation based on the first available capacity and the second available capacity.

[0029] According to another aspect of this application, a computer-readable storage medium is provided, the storage medium storing a computer program for performing the adjustment method for the openable capacity of distributed photovoltaic systems described above.

[0030] According to another aspect of this application, an electronic device is provided, the electronic device comprising:

[0031] processor;

[0032] Memory used to store the processor's executable instructions;

[0033] The processor is configured to execute any of the above-described methods for adjusting the available capacity of distributed photovoltaic systems.

[0034] This application provides a method, apparatus, medium, and equipment for adjusting the available capacity of distributed photovoltaic (PV) power generation. The method includes: obtaining the on-transit PV capacity and minimum load of a 220kV substation; calculating a first available capacity of the 220kV substation based on the on-transit PV capacity and minimum load; and obtaining a second available capacity of a downstream substation. The downstream substation receives power from the 220kV substation. The target available capacity of the downstream substation is adjusted based on the first and second available capacities. The first available capacity of the 220kV substation can be obtained from its on-transit PV capacity and minimum load. Furthermore, the target available capacity of the downstream substation is adjusted based on its second and first available capacities. The method provided in this application comprehensively considers factors such as on-transit PV capacity and minimum load, as well as the verification of the available capacity of distributed PV power generation between the main transformer and downstream substations, thus improving the accuracy of the calculated available capacity of distributed PV power generation. Attached Figure Description

[0035] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0036] Figure 1 This is a flowchart illustrating a method for adjusting the open capacity of distributed photovoltaic power generation provided in an exemplary embodiment of this application.

[0037] Figure 2 This is a parallel operation diagram of the low-voltage side of a 220kV substation provided in an exemplary embodiment of this application.

[0038] Figure 3 This is a schematic diagram of the second openable capacity acquisition process provided in an exemplary embodiment of this application.

[0039] Figure 4 This is a schematic diagram of the parallel structure of the high-voltage side of a 110kV substation provided in an exemplary embodiment of this application.

[0040] Figure 5 This is a schematic diagram of the parallel structure of the high-voltage side of a 110kV substation provided in an exemplary embodiment of this application.

[0041] Figure 6 This is a schematic diagram of the structure of a distributed photovoltaic capacity adjustment device provided in an exemplary embodiment of this application.

[0042] Figure 7 This is a schematic diagram of the structure of a distributed photovoltaic capacity adjustment device provided in another exemplary embodiment of this application.

[0043] Figure 8 This is a structural diagram of an electronic device provided in an exemplary embodiment of this application. Detailed Implementation

[0044] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein.

[0045] Figure 1 This is a flowchart illustrating a method for adjusting the open capacity of distributed photovoltaic power generation provided in an exemplary embodiment of this application. Figure 2 This is an exemplary embodiment of the present application providing a parallel operation diagram of the low-voltage side of a 220kV substation. For example... Figure 1-2 As shown, the methods for adjusting the available capacity of distributed photovoltaic systems include:

[0046] Step 110: Obtain the photovoltaic capacity in transit corresponding to the 220kV substation and the minimum load of the 220kV substation.

[0047] In this embodiment, the minimum load of a 220kV substation refers to the minimum load of the 220kV substation within a certain period of time. This certain period of time can be a day, a week, a month, etc., and the specific time is not limited.

[0048] In this embodiment of the application, the photovoltaic (PV) on-transit capacity refers to the installed capacity of PV power generation projects that have been registered with the power supply company but have not yet been connected to the grid (PV projects applying for future grid connection). The PV on-transit capacity corresponding to a 220kV substation and the minimum load of the 220kV substation can be stored in a memory. When needed, they can be retrieved directly from the memory. Alternatively, the current PV on-transit capacity and minimum load of the 220kV substation can also be obtained in real time.

[0049] like Figure 2 As shown, parallel operation of 220kV transformers means connecting the primary windings of two or more 220kV transformers in parallel to the same voltage busbar, and connecting the secondary windings in parallel to a different voltage busbar. With switch 102 closed, the medium-voltage side of the 220kV substation operates in parallel; with switch 102 open, the medium-voltage side of the 220kV substation operates in separate phases.

[0050] When switch 1102 is closed, the low-voltage side of the 220kV substation operates in parallel. When switch 1102 is open, the low-voltage side of the 220kV substation operates separately.

[0051] Step 120: Calculate the first available capacity of the 220kV substation based on the photovoltaic capacity in transit corresponding to the 220kV substation and the minimum load of the 220kV substation.

[0052] The formula for calculating the first available capacity of a 220kV substation is as follows: For the minimum load of a 220kV substation, W p This refers to the photovoltaic capacity in transit at a 220kV substation.

[0053] Step 130: Obtain the second available capacity corresponding to the lower-level substation, wherein the lower-level substation receives power from the 220kV substation.

[0054] A 220kV substation can provide power to the transformers connected to it; that is, the downstream transformer is connected to the busbar of the 220kV substation, and therefore the transformer is a downstream transformer. Examples include 110kV transformers, 35kV transformers, and 10kV transformers.

[0055] Step 140: Adjust the target open capacity of the downstream transformer based on the first and second open capacities.

[0056] In one embodiment, step 120 can be specifically implemented as follows: Based on the photovoltaic capacity in transit corresponding to the 220kV substation and the minimum load of the 220kV substation, calculate the first available capacity of the 220kV substation; wherein, the calculation formula for the first available capacity of the 220kV substation is: For the minimum load of a 220kV substation, W p This refers to the photovoltaic capacity in transit at a 220kV substation.

[0057] This application provides a method for adjusting the available capacity of distributed photovoltaic (PV) power, comprising: obtaining the on-transit PV capacity and minimum load of a 220kV substation; calculating a first available capacity of the 220kV substation based on the on-transit PV capacity and minimum load; and obtaining a second available capacity of a downstream substation. The downstream substation receives power from the 220kV substation. Based on the first and second available capacities, the target available capacity of the downstream substation is adjusted. The first available capacity of the 220kV substation can be obtained from its on-transit PV capacity and minimum load. Furthermore, the target available capacity of the downstream substation is adjusted using its second and first available capacities.

[0058] Figure 3 This is a schematic diagram of a second openable capacity acquisition process provided in an exemplary embodiment of this application. For example... Figure 3 As shown, the downstream substation is a 110kV substation, and step 130 may include:

[0059] Step 131: Obtain the total capacity of the 110kV substation, the maximum capacity of the main transformer of the 110kV substation, the photovoltaic capacity in transit of the 110kV substation, and the minimum load of the 110kV substation.

[0060] Obtain the total capacity of the 110kV substation, the maximum capacity of the main transformer of the 110kV substation, the photovoltaic capacity in transit of the 110kV substation, and the minimum load of the 110kV substation.

[0061] Step 132: Calculate the second available capacity of the next-level substation based on the total capacity of the 110kV substation, the maximum capacity of the main transformer of the 110kV substation, the photovoltaic capacity in transit of the 110kV substation, and the minimum load of the 110kV substation.

[0062] In one embodiment, step 132 can be specifically implemented as follows: Based on the total capacity of the 110kV substation, the maximum capacity of the main transformer of the 110kV substation, the photovoltaic capacity in transit of the 110kV substation, and the minimum load of the 110kV substation, the second available capacity corresponding to the lower-level substation is calculated; wherein, the formula for calculating the second available capacity includes: Among them, S Sb The total capacity of the 110kV substation W represents the maximum capacity of the main transformer in a 110kV substation.p For the photovoltaic capacity in transit of a 110kV substation, This represents the minimum load for a 110kV substation. By modifying the formula, the N-1 power supply safety criterion for the distribution network can be achieved. This means that under normal operating conditions, if any component in the power system is fault-free or disconnected due to a fault, the power system can maintain stable operation and normal power supply, without overloading other components, and can maintain the system's stability and continuous power supply capability.

[0063] The second open capacity A1 of a 110kV substation = minimum load + (total substation capacity - maximum main transformer capacity) × power factor (0.95) × short-time overload factor (1.3) - photovoltaic capacity in transit × output efficiency (100%).

[0064] If the transformers in a 110kV substation are operating separately on the medium and low voltage sides, further verification is required:

[0065]

[0066] The available capacity A2 of the 110kV substation is calculated as min(the second available capacity A1 of the 110kV substation, the sum of the available capacities of all transformers in the substation). In other words, the minimum value between the second available capacity A1 of the 110kV substation and the sum of the available capacities of all transformers in the substation is selected as the second available capacity of the 110kV substation operating on the medium and low voltage sides. The available capacity of each transformer in the substation is the sum of the available capacities of multiple transformers connected to the 110kV substation.

[0067] In one embodiment, step 130 can be specifically implemented as follows: if the capacity of the 110kV transformer of the 110kV substation is less than or equal to a preset capacity threshold, then the substation rated capacity of the 110kV transformer is obtained; based on the substation rated capacity of the 110kV transformer, the photovoltaic capacity in transit of the 110kV transformer, and the minimum load of the 110kV transformer, the available capacity of the 110kV transformer is calculated.

[0068] The preset capacity threshold can be 80 kVA. If the capacity of the transformer in the 110 kV substation is less than or equal to the preset capacity threshold, it means that the transformer in the 110 kV substation is not overloaded in the reverse direction. Therefore, the rated capacity of the transformer in the substation is obtained. Based on the rated capacity of the transformer in the substation, the photovoltaic capacity in transit of the transformer, and the minimum load of the transformer, the corresponding open capacity of the transformer is calculated.

[0069] In one embodiment, step 130 can be specifically implemented as follows: calculating the available capacity of the transformer based on the transformer's substation rated capacity, the transformer's photovoltaic capacity in transit, and the transformer's minimum load; wherein, the calculation formula for the available capacity of a 110kV transformer is as follows: S is the minimum load of the transformer. Tr W is the rated capacity of the transformer. p This refers to the photovoltaic capacity of the transformer in transit.

[0070] The transformer capacity that can be opened in a 110kV substation, A = minimum load + substation rated capacity × power factor (0.95) × heavy load rate limit (80%) - photovoltaic capacity in transit × output efficiency (100%).

[0071] In one embodiment, the downstream substation is a 35kV substation, and step 130 can be specifically implemented as follows:

[0072] Obtain the minimum load, total capacity, and photovoltaic capacity in transit of the 35kV substation; calculate the second available capacity of the 35kV substation based on the minimum load, total capacity, and photovoltaic capacity in transit of the 35kV substation.

[0073] The formula for calculating the second open capacity of a 35kV substation is: minimum load of the 35kV substation + (total capacity of the 35kV substation - maximum main transformer capacity of the 35kV substation) × power factor (0.95) × short-time overload factor (1.3) - photovoltaic capacity in transit × output efficiency (100%).

[0074] If the transformers in a 35kV substation are operating in separate low-voltage configurations, then:

[0075] The available capacity of a 35kV substation, A2, is equal to the minimum of the available capacity of the 35kV substation, A1, and the sum of the available capacities of all transformers in the substation. In other words, it is the minimum value between the available capacity of the 35kV substation, A1, and the sum of the available capacities of all transformers in the substation. The available capacity of all transformers in the substation can be the sum of the available capacities of all transformers in the 35kV substation.

[0076] If the capacity of the transformer in the 35kV substation is less than or equal to the preset capacity threshold, obtain the minimum load of the transformer, the rated capacity of the transformer, and the photovoltaic capacity in transit of the substation; based on the minimum load of the transformer, the rated capacity of the transformer, and the photovoltaic capacity in transit of the 35kV substation, calculate the available capacity of the transformer.

[0077] The preset capacity threshold can be 80 kVA. If the capacity of the transformer in the 110 kV substation is less than or equal to the preset capacity threshold, it means that the transformer in the 110 kV substation is not overloaded in reverse. The transformer's open capacity A = minimum load of the transformer + rated transformer capacity × power factor (0.95) × preset capacity threshold (80%) - photovoltaic capacity in transit × output efficiency (100%).

[0078] In one embodiment, after step 130, step 150 can be specifically implemented as follows: obtaining the minimum load of the 10kV line and the rated transmission capacity of the 10kV line trunk; and calculating the second openable capacity of the 10kV line based on the minimum load of the 10kV line and the rated transmission capacity of the 10kV line trunk.

[0079] A 10kV line refers to multiple lines on a 10kV busbar. The second open capacity A of a 10kV line = minimum load of the 10kV line + rated transmission capacity of the 10kV line trunk × power factor (0.95) × heavy load rate limit (80%) - photovoltaic capacity in transit × output efficiency (100%).

[0080] In one embodiment, step 130 may be specifically implemented as follows: obtaining the minimum load of the transformer distribution transformer of the 10kV substation and the rated capacity of the transformer distribution transformer of the 10kV substation; calculating the available capacity of the transformer distribution transformer of the 10kV substation based on the minimum load of the transformer distribution transformer of the 10kV substation and the rated capacity of the transformer distribution transformer of the 10kV substation.

[0081] The exploitable capacity A of the transformer in a 10kV substation is calculated as follows: A = Minimum load of the transformer in the 10kV substation + Rated capacity of the transformer × Power factor (0.95) × Preset capacity threshold (80%) - Photovoltaic capacity in transit × Output efficiency (100%). Where the minimum load of the transformer in the 10kV substation is greater than 0, it is taken as 0.

[0082] In one embodiment, there are multiple second openable capacities, and step 140 can be specifically implemented as follows: calculate the sum of multiple second openable capacities; if the sum of multiple second openable capacities is equal to the first openable capacity, then reduce the target openable capacity of the downstream transformer.

[0083] The available capacity of the 220kV substation, B, is calculated as follows: B = min(220kV substation's second available capacity A, the second available capacity A of the 110kV substation connected to the 220kV substation + the second available capacity A of the 35kV substation + the second available capacity A of the 10kV line). If the available capacity B of the 220kV substation equals the available capacity A of the second 220kV substation (A is smaller), it indicates that the available capacity on the 220kV high-voltage side is larger than that on the low-voltage side, and the available capacity of the downstream substations needs to be reduced. A reduction coefficient is set: reduction coefficient k = available capacity B of the 220kV substation / available capacity of the downstream substation of the 220kV substation. The available capacity of the downstream substation is the sum of the second available capacity A of the 110kV substation and the second available capacity A of the 35kV substation.

[0084] The available capacity of a 110kV substation, B, equals the available capacity of a 110kV substation, A × k.

[0085] The open capacity of a 35kV substation is B = the open capacity of a 35kV substation is A × k.

[0086] Figure 4 This is a schematic diagram of a parallel structure on the high-voltage side of a 110kV substation provided in an exemplary embodiment of this application. (See diagram below.) Figure 4 As shown, 220kV substation A and 220kV substation B are connected to a 110kV substation. Only 220kV substation A supplies power to transformer No. 1, while transformers No. 220kV and No. 2 are supplied with power. This indicates that transformers No. 1 and No. 2 of the 110kV substation operate in parallel on the high-voltage side. This means that transformers No. 1 and No. 2 are powered through a single substation.

[0087] Figure 5 This is a schematic diagram of the high-voltage side of a 110kV substation provided in an exemplary embodiment of this application. (See diagram below.) Figure 5 As shown, 220kV substation A and 220kV substation B are connected to a 110kV substation. Substation A supplies power to transformer No. 1, and substation B supplies power to transformer No. 2. This indicates that transformers No. 1 and No. 2 of the 110kV substation operate separately on the high-voltage side. In other words, transformers No. 1 and No. 2 are each powered by a separate substation.

[0088] In one embodiment, step 140 can be specifically implemented as follows: when the transformer of the 110kV substation is operating in high-voltage parallel mode, the calculation of the target open capacity of the 110kV substation includes the open capacity of the transformer of the 110kV substation.

[0089] If 110kV substation A supplies power to its transformers alone (understandably, 110kV substation B does not supply power to its transformers), then the calculation of the target available capacity of the 110kV substation includes the available capacity of the transformers of the 110kV substation.

[0090] In one embodiment, step 140 can be specifically implemented as follows: when the transformer of the 110kV substation is in high-voltage split operation, the calculation of the target open capacity of the 110kV substation does not include the open capacity of the transformer of the 110kV substation.

[0091] If 110kV substation A and 110kV substation B jointly supply power to transformer No. 1 and transformer No. 2, then the calculated available capacity of 110kV substation A includes the available capacity of transformer No. 1 but excludes the available capacity of transformer No. 2, and the calculated available capacity of 110kV substation B includes the available capacity of transformer No. 2 but excludes the available capacity of transformer No. 1.

[0092] In one embodiment, step 140 may be specifically implemented as follows: when the transformers of the 35kV substation are operating in high-voltage parallel mode, the calculation of the target open capacity of the 35kV substation includes the open capacity of each transformer of the 35kV substation.

[0093] If 35kV substation A supplies power to its transformers alone (understandably, 35kV substation B does not supply power to its transformers), then the calculation of the target available capacity of the 35kV substations includes the available capacity of the transformers of the 35kV substations.

[0094] In one embodiment, step 140 can be specifically implemented as follows: when the transformer of the 35kV substation is in high-voltage split operation, the calculation of the target open capacity of the 35kV substation does not include the open capacity of the transformer of the 35kV substation.

[0095] 35kV substation A and 35kV substation B jointly supply power to transformer No. 1 and transformer No. 2. Therefore, the calculated available capacity of 35kV substation A includes the available capacity of transformer No. 1 but excludes the available capacity of transformer No. 2. Similarly, the calculated available capacity of 35kV substation B includes the available capacity of transformer No. 2 but excludes the available capacity of transformer No. 1.

[0096] In one embodiment, the county's open capacity = 110kV grid open capacity B + 220kV substation's open capacity B for the 35kV station supplied under normal conditions.

[0097] Figure 5 This is a schematic diagram of the structure of a distributed photovoltaic capacity adjustment device provided in an exemplary embodiment of this application. For example... Figure 5As shown, the distributed photovoltaic (PV) capacity adjustment device 20 includes: a first acquisition module 201, used to acquire the PV capacity in transit corresponding to the 220kV substation and the minimum load of the 220kV substation; a calculation module 202, used to calculate the first available capacity of the 220kV substation based on the PV capacity in transit corresponding to the 220kV substation and the minimum load of the 220kV substation; a second acquisition module 203, used to acquire the second available capacity corresponding to the lower-level substation; wherein the lower-level substation receives power provided by the 220kV substation; and an adjustment module 204, used to adjust the target available capacity of the lower-level substation based on the first available capacity and the second available capacity.

[0098] This application provides a device for adjusting the available capacity of distributed photovoltaic (PV) power grids, comprising: a first acquisition module 201 acquiring the on-transit PV capacity and minimum load of a 220kV substation; a calculation module 202 calculating the first available capacity of the 220kV substation based on the on-transit PV capacity and minimum load; a second acquisition module 203 acquiring the second available capacity of a downstream substation, wherein the voltage of the downstream substation is lower than that of the 220kV substation, and the downstream substation is connected to the busbar of the 220kV substation; and an adjustment module 204 adjusting the target available capacity of the downstream substation based on the first and second available capacities. The first available capacity of the 220kV substation can be obtained from the on-transit PV capacity and minimum load of the 220kV substation. Furthermore, the target available capacity of the downstream substation is adjusted based on the second and first available capacities of the downstream substation.

[0099] Figure 6 This is a schematic diagram of the structure of a distributed photovoltaic capacity adjustment device provided in another exemplary embodiment of this application. (See diagram below.) Figure 6 As shown, the calculation module 202 can be specifically configured to: calculate the first available capacity of the 220kV substation based on the photovoltaic capacity in transit corresponding to the 220kV substation and the minimum load of the 220kV substation; wherein, the calculation formula for the first available capacity of the 220kV substation is: For the minimum load of a 220kV substation, W p This refers to the photovoltaic capacity in transit at a 220kV substation.

[0100] In one embodiment, the lower-level substation is a 110kV substation. The second acquisition module 203 may include: a second acquisition subunit 2031, used to acquire the total capacity of the 110kV substation, the maximum value of the main transformer capacity of the 110kV substation, the photovoltaic capacity in transit of the 110kV substation, and the minimum load of the 110kV substation; and a calculation subunit 2032, used to calculate the second available capacity corresponding to the lower-level substation based on the total capacity of the 110kV substation, the maximum value of the main transformer capacity of the 110kV substation, the photovoltaic capacity in transit of the 110kV substation, and the minimum load of the 110kV substation.

[0101] In one embodiment, the calculation subunit 2032 may be specifically configured to: calculate the second available capacity corresponding to the lower-level substation based on the total capacity of the 110kV substation, the maximum capacity of the main transformer of the 110kV substation, the photovoltaic capacity in transit of the 110kV substation, and the minimum load of the 110kV substation; wherein, the calculation formula for the second available capacity includes: Among them, S Sb The total capacity of the 110kV substation W represents the maximum capacity of the main transformer in a 110kV substation. p For the photovoltaic capacity in transit of a 110kV substation, This is the minimum load for a 110kV substation.

[0102] In one embodiment, the adjustment of the openable capacity 20 can be specifically configured as follows: if the capacity of each transformer in the 110kV substation is less than or equal to the preset capacity threshold, then the substation rated capacity of the 110kV transformer is obtained; based on the substation rated capacity of the 110kV transformer, the photovoltaic capacity in transit of the 110kV transformer, and the minimum load of the 110kV transformer, the openable capacity corresponding to the 110kV transformer is calculated.

[0103] In one embodiment, the adjustment of the available capacity 20 can be specifically configured as follows: The available capacity of the transformer is calculated based on the transformer's substation rated capacity, the transformer's photovoltaic capacity in transit, and the minimum load of the 110kV transformer; wherein, the calculation formula for the available capacity of the transformer is as follows: S is the minimum load of the transformer. Tr W is the rated capacity of the transformer. p This refers to the photovoltaic capacity of the transformer in transit.

[0104] In one embodiment, there are multiple second openable capacities, wherein the adjustment module 204 may be specifically configured to: calculate the sum of multiple second openable capacities; if the sum of multiple second openable capacities is greater than the first openable capacity, then reduce the second openable capacity of the downstream transformer to obtain the target openable capacity.

[0105] Figure 7 A block diagram of an electronic device according to an embodiment of this application is illustrated.

[0106] like Figure 7 As shown, the electronic device 10 includes one or more processors 11 and memory 12.

[0107] The processor 11 may be a central processing unit (CPU) or other form of processing unit with data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device 10 to perform desired functions.

[0108] The memory 12 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. Volatile memory may include, for example, random access memory (RAM) and / or cache memory. Non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 11 may execute the program instructions to implement the distributed photovoltaic open capacity adjustment method and / or other desired functions of the various embodiments of this application described above. Various contents such as input signals, signal components, and noise components may also be stored in the computer-readable storage medium.

[0109] In one example, the electronic device 10 may also include an input device 13 and an output device 14, which are interconnected via a bus system and / or other forms of connection mechanism (not shown).

[0110] When the electronic device is a standalone device, the input device 13 can be a communication network connector for receiving the collected input signals from the first device and the second device.

[0111] In addition, the input device 13 may also include, for example, a keyboard, a mouse, etc.

[0112] The output device 14 can output various information to the outside, including determined distance information, direction information, etc. The output device 14 may include, for example, a display, a speaker, a printer, and a communication network and its connected remote output devices, etc.

[0113] Of course, for the sake of simplicity, Figure 7Only some of the components of the electronic device 10 relevant to this application are shown in this illustration; components such as buses, input / output interfaces, etc., are omitted. In addition, the electronic device 10 may include any other suitable components depending on the specific application.

[0114] The computer program product can be written in any combination of one or more programming languages ​​to perform the operations of the embodiments of this application. The programming languages ​​include object-oriented programming languages ​​such as Java and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0115] The computer-readable storage medium may be any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may, for example, include, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatuses, or devices, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: electrical connections having one or more wires, portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0116] The above description has been given for illustrative and descriptive purposes. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A method for adjusting the openable capacity of distributed photovoltaic power generation, characterized in that, include: Obtain the photovoltaic capacity in transit corresponding to the 220kV substation and the minimum load of the 220kV substation; Based on the photovoltaic capacity in transit corresponding to the 220kV substation and the minimum load of the 220kV substation, the first open capacity of the 220kV substation is calculated. Obtain the second available capacity corresponding to the lower-level substation; wherein, the lower-level substation receives power provided by the 220kV substation; Adjust the target available capacity of the lower-level substation based on the first available capacity and the second available capacity; The calculation of the first open capacity of the 220kV substation based on the photovoltaic capacity in transit corresponding to the 220kV substation and the minimum load of the 220kV substation includes: Based on the photovoltaic capacity in transit corresponding to the 220kV substation and the minimum load of the 220kV substation, the first available capacity of the 220kV substation is calculated; wherein, the calculation formula for the first available capacity of the 220kV substation is: , For the minimum load of a 220kV substation, W p This refers to the photovoltaic capacity in transit of the 220kV substation. The lower-level substation is a 110kV substation, wherein obtaining the second available capacity corresponding to the lower-level substation includes: The total capacity of the 110kV substation, the maximum value of the main transformer capacity of the 110kV substation, the photovoltaic capacity in transit of the 110kV substation, and the minimum load of the 110kV substation are obtained. The second available capacity of the lower-level substation is calculated based on the total capacity of the 110kV substation, the maximum capacity of the main transformer of the 110kV substation, the photovoltaic capacity in transit of the 110kV substation, and the minimum load of the 110kV substation. The calculation of the second available capacity corresponding to the lower-level substation based on the total capacity of the 110kV substation, the maximum capacity of the main transformer of the 110kV substation, the photovoltaic capacity in transit of the 110kV substation, and the minimum load of the 110kV substation includes: Based on the total capacity of the 110kV substation, the maximum capacity of the main transformer of the 110kV substation, the photovoltaic capacity in transit of the 110kV substation, and the minimum load of the 110kV substation, the second available capacity corresponding to the lower-level substation is calculated; wherein, the calculation formula for the second available capacity includes: , of which S Sb This refers to the total capacity of the 110kV substation. W represents the maximum capacity of the main transformer in a 110kV substation. p This refers to the photovoltaic capacity in transit of the 110kV substation. This is the minimum load of the 110kV substation.

2. The method for adjusting the openable capacity of distributed photovoltaic power generation according to claim 1, characterized in that, Also includes: If the capacity of the transformer connected to the 110kV substation is less than or equal to a preset capacity threshold, then the substation rated capacity of the transformer is obtained. The available capacity of the transformer is calculated based on the substation's rated capacity, the photovoltaic capacity in transit of the transformer, and the transformer's minimum load.

3. The method for adjusting the openable capacity of distributed photovoltaic power according to claim 2, characterized in that, The calculation of the available capacity of the transformer based on the substation's rated capacity, the transformer's photovoltaic capacity in transit, and the transformer's minimum load includes: Based on the substation rated capacity of the transformer, the photovoltaic capacity in transit of the transformer, and the minimum load of the transformer, the available capacity corresponding to the transformer is calculated; wherein, the calculation formula for the available capacity corresponding to the transformer is as follows: , S represents the minimum load of the transformer. Tr W represents the rated capacity of the transformer. p The photovoltaic capacity in transit of the transformer is given.

4. The method for adjusting the openable capacity of distributed photovoltaic power according to claim 1, characterized in that, The second available capacity can be multiple, wherein adjusting the target available capacity of the lower-level substation based on the first available capacity and the second available capacity includes: Calculate the sum of multiple second-openable capacities; If the sum of the plurality of second available capacities is greater than the first available capacity, then the second available capacity of the lower-level substation is reduced to obtain the target available capacity.

5. A device for adjusting the available capacity of distributed photovoltaic power generation, implementing the method for adjusting the available capacity of distributed photovoltaic power generation as described in claim 1, characterized in that, include: The first acquisition module is used to acquire the photovoltaic capacity in transit corresponding to the 220kV substation and the minimum load of the 220kV substation; The calculation module is used to calculate the first open capacity of the 220kV substation based on the photovoltaic capacity in transit corresponding to the 220kV substation and the minimum load of the 220kV substation. The second acquisition module is used to acquire the second available capacity corresponding to the lower-level substation; wherein, the lower-level substation receives power provided by the 220kV substation; The adjustment module is used to adjust the target available capacity of the lower-level substation based on the first available capacity and the second available capacity.

6. A computer-readable storage medium storing a computer program for performing the method for adjusting the openable capacity of distributed photovoltaic power according to any one of claims 1-4.

7. An electronic device, the electronic device comprising: processor; Memory used to store the processor's executable instructions; The processor is configured to execute the method for adjusting the openable capacity of distributed photovoltaic power as described in any one of claims 1-4.

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