Method for determining photovoltaic power generation output power, electronic device and storage medium

Abstract

The present invention provides a method for determining the output power of photovoltaic power generation, an electronic device, and a storage medium. By collecting the total power of each substation area, the total power of user electricity consumption, and the total power of photovoltaic power generation in the distribution network system; based on the total power of the substation area, the total power of user electricity consumption, and the total power of photovoltaic power generation, a target function is constructed with the optimal line loss of the distribution network system as the optimization goal; based on a preset algorithm, the target function is solved and iterated to obtain the optimal output power of photovoltaic power generation for each substation area in the distribution network system, which not only satisfies the optimal line loss of the distribution network system but also can effectively control the output power of photovoltaic power generation, thereby effectively ensuring the safety and economy of the operation of the distribution network.

Description

Technical Field

[0001] The present invention relates to the technical field of distributed photovoltaic power generation monitoring and control, and particularly to a method for determining the output power of photovoltaic power generation, an electronic device, and a storage medium. Background Art

[0002] Currently, as a renewable energy utilization method with the widest scope, distributed photovoltaic power generation has been attracting increasing attention due to its obvious application advantages, and the capacity and quantity of its connection to the distribution network system have been increasing year by year.

[0003] However, during the process of electric energy conversion, solar energy is vulnerable to interference from factors such as climate, resulting in abnormal output power of photovoltaic power generation. Therefore, unreasonable grid connection positions and grid connection capacities of distributed photovoltaics connected to the distribution network system may affect the stable operation of the distribution network, further affecting the economy of the distribution network operation and even endangering the safety of the distribution network. In the prior art, although the distribution network will make special plans for distributed power sources, due to the complex operating conditions of the distribution network and the ever-changing load, the results of prior planning may lose rationality during the actual operation of the subsequent distribution network.

[0004] Based on this, how to achieve the optimal configuration of distributed photovoltaic power generation during actual operation is a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0005] Embodiments of the present invention provide a method for determining the output power of photovoltaic power generation, an electronic device, and a storage medium, so as to solve the problem that in the prior art, due to the complex operating conditions of the distribution network and the ever-changing load, the results of prior planning for distributed photovoltaic power sources may lose rationality during the actual operation of the subsequent distribution network, thereby affecting the stability of the distribution network operation.

[0006] In a first aspect, embodiments of the present invention provide a method for determining the output power of photovoltaic power generation, including:

[0007] Collect the total power of each substation area, the total power of user electricity consumption, and the total power of photovoltaic power generation in the distribution network system;

[0008] Based on the total power of the substation area, the total power of user electricity consumption, and the total power of photovoltaic power generation, construct an objective function with the optimal line loss of the distribution network system as the optimization target;

[0009] Based on a preset algorithm, solve and iterate the objective function to obtain the optimal output power of photovoltaic power generation for each substation area in the distribution network system.

[0010] In a possible implementation manner, the objective function includes:

[0011]

[0012] Among them, f represents the target function, min represents the minimum value function, and ΔP loss represents the line loss of the distribution network system, i represents the i-th substation area in the distribution network system, n represents the first total number of all substation areas in the distribution network system, and P iZ represents the total power of the i-th substation area, j represents the j-th electricity user in the substation area, m represents the second total number of all electricity users in the substation area, and P ijY represents the electricity consumption power of the j-th electricity user in the i-th substation area, s represents the s-th photovoltaic power generation user in the substation area, a represents the third total number of all photovoltaic power generation users in the substation area, and P isG represents the photovoltaic power generation power of the s-th photovoltaic power generation user in the i-th substation area.

[0013] In a possible implementation manner, solving and iterating the target function based on a preset algorithm to obtain the optimal output power of photovoltaic power generation for each substation area in the distribution network system includes:

[0014] Calculating the system line loss value of the distribution network system based on the total power of all substation areas, the total power of user electricity consumption, and the total photovoltaic power generation in the distribution network system;

[0015] When there is no power output from each substation area and the total photovoltaic power generation does not reach the preset power threshold, adjusting the power generation power of photovoltaic power generation users in each substation area based on the system line loss value, and determining the new total photovoltaic power generation based on the adjusted power generation power of photovoltaic power generation users;

[0016] Re-executing the steps of "collecting the total power of each substation area, the total power of user electricity consumption, and the total photovoltaic power generation in the distribution network system" and subsequent steps;

[0017] Until there is power output from each substation area or the total photovoltaic power generation reaches the preset power threshold, determining the optimal output power of photovoltaic power generation for each substation area in the distribution network system based on the current total photovoltaic power generation of each substation area and the total power of user electricity consumption in that substation area.

[0018] In a possible implementation manner, determining the optimal output power of photovoltaic power generation for each substation area in the distribution network system based on the current total photovoltaic power generation of each substation area and the total power of user electricity consumption in that substation area includes:

[0019] Calculating the difference between the current total photovoltaic power generation of each substation area and the total power of user electricity consumption in that substation area;

[0020] Determining the optimal output power of photovoltaic power generation for each substation area in the distribution network system based on the difference and the preset difference.

[0021] In a possible implementation, determining the optimal output power of photovoltaic power generation for each substation area in the distribution network system based on the difference and a preset difference includes:

[0022] Determine whether the difference is less than the preset difference;

[0023] When the difference is not less than the preset difference, use the photovoltaic power generation power corresponding to the outgoing power of each substation area or the preset power threshold as the optimal output power of photovoltaic power generation for each substation area in the distribution network system.

[0024] In a possible implementation, after determining whether the difference is less than the preset difference, it further includes:

[0025] When the difference is less than the preset difference, readjust the power generation power of the current photovoltaic power generation users in each substation area, and determine the latest total photovoltaic power generation power according to the readjusted power generation power of the photovoltaic power generation users;

[0026] Re - execute the steps of "collecting the total substation area power, total user power consumption, and total photovoltaic power generation power corresponding to each substation area in the distribution network system" and subsequent steps.

[0027] In a second aspect, an embodiment of the present invention provides a device for determining the output power of photovoltaic power generation, including:

[0028] A data acquisition module, configured to collect the total substation area power, total user power consumption, and total photovoltaic power generation power corresponding to each substation area in the distribution network system;

[0029] A function construction module, configured to construct an objective function with the optimal line loss of the distribution network system as the optimization objective based on the total substation area power, the total user power consumption, and the total photovoltaic power generation power;

[0030] A power determination module, configured to solve and iterate the objective function based on a preset algorithm to obtain the optimal output power of photovoltaic power generation for each substation area in the distribution network system.

[0031] In a third aspect, an embodiment of the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the method described in the first aspect or any possible implementation manner of the first aspect above.

[0032] In a fourth aspect, an embodiment of the present invention provides a system for determining the output power of photovoltaic power generation, including: the electronic device described in the third aspect above, and further including: a collection device corresponding to each substation area in the distribution network system;

[0033] The first end of the acquisition device is connected to the electronic device, and the second end is connected to the substation watt-hour meter in the corresponding substation area, the first watt-hour meters of each electricity user, and the second watt-hour meters of each photovoltaic power generation user, and is used to collect the total power of each substation area, the total power consumption of users, and the total photovoltaic power generation in the distribution network system.

[0034] In a fifth aspect, an embodiment of the present invention provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the steps of the method described in the first aspect or any possible implementation manner of the first aspect above are implemented.

[0035] An embodiment of the present invention provides a method, an electronic device, and a storage medium for determining the photovoltaic power generation output power. By using the total power of each substation area, the total power consumption of users, and the total photovoltaic power generation in the distribution network system as variables, and based on a preset algorithm, an objective function constructed with the optimal line loss of the distribution network system as the optimization target is optimized and solved, so as to obtain the optimal photovoltaic power generation output power of each substation area when the line loss of the distribution network system is optimal, which not only satisfies the optimal line loss of the distribution network system, but also can effectively control the output power of photovoltaic power generation, thereby effectively ensuring the safety and economy of the operation of the distribution network. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings without creative efforts based on these drawings.

[0037] Figure 1 is a flowchart of the implementation of the method for determining the photovoltaic power generation output power provided by the embodiment of the present invention;

[0038] Figure 2 is a schematic structural diagram of the device for determining the photovoltaic power generation output power provided by the embodiment of the present invention;

[0039] Figure 3 is a schematic diagram of the electronic device provided by the embodiment of the present invention;

[0040] Figure 4 is a schematic structural diagram of the system for determining the photovoltaic power generation output power provided by the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. However, those skilled in the art should clearly understand that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present invention.

[0042] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will be described through specific embodiments with reference to the accompanying drawings.

[0043] Figure 1 The implementation flowchart of the method for determining the photovoltaic power generation output power provided by the embodiments of the present invention is as Figure 1 shown and is described in detail as follows:

[0044] The method for determining the photovoltaic power generation output power provided by the embodiments of the present invention includes:

[0045] Step 101: Collect the total power of each substation area, the total power of user electricity consumption, and the total power of photovoltaic power generation corresponding to each substation area in the distribution network system.

[0046] In step 101, the total power of each substation area, the total power of user electricity consumption, and the total power of photovoltaic power generation in the distribution network system are collected in real time, which is beneficial to subsequent calculation of the line loss of the distribution network system based on these data, and then timely adjustment of the photovoltaic power generation output power of each substation area in the distribution network system based on the system line loss.

[0047] Step 102: Based on the total power of the substation area, the total power of user electricity consumption, and the total power of photovoltaic power generation, construct an objective function with the optimal line loss of the distribution network system as the optimization objective.

[0048] In step 102, an objective function can be constructed based on the total power of each substation area, the total power of user electricity consumption, and the total power of photovoltaic power generation collected in real time in the distribution network system, with the optimal line loss of the distribution network system as the optimization objective, which is beneficial to calculating the optimal photovoltaic power generation output power of each substation area when the line loss of the distribution network system is optimal based on this objective function, and further beneficial to the safe and economic operation of the distribution network system.

[0049] In a possible implementation manner, the objective function includes:

[0050]

[0051] Among them, f represents the objective function, min represents the minimum value function, ΔP loss represents the line loss of the distribution network system, i represents the i-th substation area in the distribution network system, n represents the first total number of all substation areas in the distribution network system, P iZIt represents the total power of the i-th substation area, where j represents the j-th electricity user in the substation area, m represents the second total number of all electricity users in the substation area, and P ijY It represents the electricity consumption power of the j-th electricity user in the i-th substation area, where s represents the s-th photovoltaic power generation user in the substation area, a represents the third total number of all photovoltaic power generation users in the substation area, and P isG It represents the photovoltaic power generation power of the s-th photovoltaic power generation user in the i-th substation area.

[0052] In this embodiment, the optimal line loss of the distribution network system can be used as the objective function, which is beneficial to obtaining the optimal power of the photovoltaic power generation users under each substation area (i.e., the optimal output power of photovoltaic power generation in each substation area) when the line loss of the distribution network system is optimal. Exemplarily, the objective function can be:

[0053]

[0054] Among them, f represents the objective function, min represents the minimum value function, and ΔP loss represents the line loss of the distribution network system, i represents the i-th substation area in the distribution network system, n represents the first total number of all substation areas in the distribution network system, and P iZ It represents the total power of the i-th substation area, where j represents the j-th electricity user in the substation area, m represents the second total number of all electricity users in the substation area, and P ijY It represents the electricity consumption power of the j-th electricity user in the i-th substation area, where s represents the s-th photovoltaic power generation user in the substation area, a represents the third total number of all photovoltaic power generation users in the substation area, and P isG It represents the photovoltaic power generation power of the s-th photovoltaic power generation user in the i-th substation area.

[0055] Step 103: Solve and iterate the objective function based on a preset algorithm to obtain the optimal output power of photovoltaic power generation for each substation area in the distribution network system.

[0056] In step 103, the constructed objective function can be optimized and iterated based on a preset algorithm, so as to obtain the optimal output power of the photovoltaic power generation users in each substation area when the line loss of the distribution network system is optimal.

[0057] In a possible implementation manner, solving and iterating the objective function based on a preset algorithm to obtain the optimal output power of photovoltaic power generation for each substation area in the distribution network system includes:

[0058] Calculate the system line loss value of the distribution network system based on the total power of all substation areas, the total power of user electricity consumption, and the total power of photovoltaic power generation in the distribution network system.

[0059] When there is no power output to the outside in each substation area and the total photovoltaic power generation does not reach the preset power threshold, adjust the power generation power of photovoltaic power generation users in each substation area based on the system line loss value, and determine the new total photovoltaic power generation according to the adjusted power generation power of photovoltaic power generation users.

[0060] Re-execute the steps of "collecting the total substation area power, total user power consumption, and total photovoltaic power generation corresponding to each substation area in the distribution network system" and subsequent steps.

[0061] Until there is power output to the outside in each substation area or the total photovoltaic power generation reaches the preset power threshold, determine the optimal output power of photovoltaic power generation in each substation area of the distribution network system based on the current total photovoltaic power generation in each substation area and the total power consumption of users in that substation area.

[0062] For the distribution network system, the total demand of electricity users in each substation area inside it comes from the total substation area power transmitted by the power distribution company and the total photovoltaic power generation output within the substation area. For a certain substation area, when the total photovoltaic power generation within the substation area is relatively large while the total power consumption demand of electricity users remains relatively unchanged, the total substation area power transmitted by the power distribution company can be reduced, thereby avoiding the line loss during the transmission of a relatively large total substation area power to a certain extent. Therefore, usually, if the power generated by photovoltaic power generation in each substation area of the distribution network system can be consumed within the substation area itself, it can effectively avoid the occurrence of power output to the outside, and further avoid the problem of large line losses during the transmission of electricity between substation areas. Exemplarily, if the power generated by photovoltaic power generation in a certain substation area cannot meet the total power consumption demand of electricity users in that substation area, the power generation power of photovoltaic power generation in that substation area can be adjusted to the maximum output power, so as to ensure that the power generated by photovoltaic power generation within the substation area can meet the power consumption demand of electricity users within the substation area as much as possible. And if the power generated by photovoltaic power generation in a certain substation area can sufficiently meet the total power consumption demand of electricity users in that substation area, power output to the outside can be considered, but in this case, the line loss during the transmission from this substation area to other substation areas should also be taken into account.

[0063] Therefore, in this embodiment, based on the total substation area power, total user power consumption, and total photovoltaic power generation of all substation areas in the current distribution network system collected in real time, calculate the system line loss value of the current distribution network system; further determine whether there is power output to the outside in each substation area of the distribution network system and whether the total photovoltaic power generation reaches the preset power threshold. When there is no power output to the outside in each substation area and the total photovoltaic power generation does not reach the preset power threshold, it indicates that the total photovoltaic power generation in the current substation areas can continue to increase. Therefore, at this time, the photovoltaic power generation power of photovoltaic power generation users in each substation area can be adjusted to facilitate meeting the power consumption demand of electricity users in the corresponding substation area.

[0064] At this time, the power generation power of photovoltaic power generation users in each substation area is adjusted based on the system line loss value of the current distribution network system. Exemplarily, for a certain current substation area, the output power of photovoltaic power generation users in this substation area can be increased, so as to realize the increase of the total photovoltaic power generation in the entire substation area. After adjusting the power generation power of photovoltaic power generation users in each substation area, the new total photovoltaic power generation is determined according to the adjusted power generation power of photovoltaic power generation users. Exemplarily, the total photovoltaic power generation in each substation area can be the sum of the power generation powers output by all photovoltaic power generation users in this substation area.

[0065] After that, the total substation area power, the total user power consumption, and the total photovoltaic power generation corresponding to each substation area in the distribution network system after adjusting the total photovoltaic power generation of the substation area are re-collected, and the new system line loss value of the distribution network system is calculated again. And based on the new system line loss value, the photovoltaic power generation power of photovoltaic power generation users in each substation area is adjusted again, so as to realize the adjustment of the total photovoltaic power generation in each substation area; until there is an outgoing power in each substation area in the distribution network system or the total photovoltaic power generation in each substation area reaches the preset power threshold, it correspondingly indicates that the total photovoltaic power generation in each current substation area can already meet the total demand of the power consumption users in this substation area or the total photovoltaic power generation in each current substation area has reached the maximum output power (i.e., the preset power threshold). At this time, the optimal output power of photovoltaic power generation in each substation area of the distribution network system can be determined based on the total photovoltaic power generation in each substation area of the current distribution network system and the total power consumption of the users in this substation area. In this embodiment, by using the total substation area power of all substation areas in the distribution network system collected, the total power consumption of all power consumption users in the substation area, and the total photovoltaic power generation of distributed photovoltaic power generation users as variables to solve and iterate the line loss of the distribution network system, the optimal output power of distributed photovoltaic power generation in each substation area is obtained; a flow of the optimal control method for distributed photovoltaic power generation with the optimal distribution network line loss as the goal is formed. At the same time, by real-time collecting the power data of each substation area in the distribution network system and timely adjusting the control strategy of photovoltaic power generation in each substation area according to the latest power data, the optimal output power of photovoltaic power generation in each substation area can be obtained while meeting the relatively optimal line loss of the distribution network system. In this way, it can not only solve the control of the photovoltaic power generation output power within and between substation areas in the distribution network system, but also reduce the line loss of the distribution network system, so as to effectively ensure the economy, safety and reliability of the operation of the distribution network system.

[0066] In a possible implementation manner, determining the optimal output power of photovoltaic power generation in each substation area of the distribution network system based on the total photovoltaic power generation in each current substation area and the total power consumption of the users in this substation area includes:

[0067] Calculate the difference between the total photovoltaic power generation in each current substation area and the total power consumption of the users in this substation area.

[0068] Determine the optimal output power of photovoltaic power generation for each sub-region in the distribution network system based on the difference and a preset difference.

[0069] In this embodiment, calculate the difference between the total photovoltaic power generation of each sub-region in the current distribution network system and the total power consumption of users in that sub-region. Based on the magnitude of this difference and the preset difference, it can be determined whether the total photovoltaic power generation corresponding to the photovoltaic power generation of each photovoltaic power generation user in the current sub-region can meet the total demand of the power consumption users in that sub-region, and then determine the optimal output power of photovoltaic power generation for that sub-region.

[0070] In a possible implementation manner, determining the optimal output power of photovoltaic power generation for each sub-region in the distribution network system based on the difference and the preset difference includes:

[0071] Judge whether the difference is less than the preset difference.

[0072] When the difference is not less than the preset difference, use the photovoltaic power generation power or the preset power threshold corresponding to the occurrence of external power transmission in each sub-region as the optimal output power of photovoltaic power generation for each sub-region in the distribution network system.

[0073] In this embodiment, when judging whether the difference is less than the preset difference, if the difference is not less than the preset difference, it indicates that the total photovoltaic power generation output by the photovoltaic power generation users in each sub-region of the distribution network system at this time can meet the total demand of the power consumption users in the corresponding sub-region. At this time, it can be controlled that the sub-region continues to transmit external power to other sub-regions, and use the photovoltaic power generation power or the preset power threshold corresponding to the occurrence of external power transmission in each sub-region as the optimal output power of photovoltaic power generation for each sub-region in the distribution network system.

[0074] In a possible implementation manner, after judging whether the difference is less than the preset difference, it further includes:

[0075] When the difference is less than the preset difference, readjust the power generation power of the current photovoltaic power generation users in each sub-region, and determine the latest total photovoltaic power generation based on the readjusted power generation power of the photovoltaic power generation users.

[0076] Re-execute the steps of "collecting the total power of each sub-region, the total power consumption of users, and the total photovoltaic power generation corresponding to each sub-region in the distribution network system" and subsequent steps.

[0077] In this embodiment, when determining whether the difference is less than a preset difference, if the difference is less than the preset difference, it indicates that the total photovoltaic power generation output by the photovoltaic power generation users in each area of the distribution network system cannot meet the condition of continuing to transmit power to other areas. At this time, the power generation power of the current photovoltaic power generation users in each area should be readjusted, and the latest total photovoltaic power generation is determined according to the readjusted power generation power of the photovoltaic power generation users. After obtaining the latest total photovoltaic power generation, it is also necessary to re-collect the total area power, the total user power consumption, and the total photovoltaic power generation corresponding to each area in the distribution network system after adjusting the total photovoltaic power generation of the adjustment area, calculate the system line loss value of the distribution network system again, and based on the current system line loss value, readjust the photovoltaic power generation power of the photovoltaic power generation users in each area, so as to realize the adjustment of the total photovoltaic power generation in each area; until there is power transmission in each area of the distribution network system or the total photovoltaic power generation in each area reaches the preset power threshold, it correspondingly indicates that the total photovoltaic power generation in each area can already meet the total demand of the power consumption users in the corresponding area or the total photovoltaic power generation in each area has reached the maximum output power (i.e., the preset power threshold). At this time, the optimal photovoltaic power generation output power of each area in the distribution network system can be determined based on the total photovoltaic power generation of each area in the current distribution network system and the total power consumption of the users in that area.

[0078] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not mean the order of execution. The execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

[0079] The following is an apparatus embodiment of the present invention. For the details not described in detail, reference can be made to the corresponding method embodiments above.

[0080] Figure 2 It is a schematic structural diagram of a device for determining the photovoltaic power generation output power provided by an embodiment of the present invention. For the sake of convenience of description, only the parts related to the embodiments of the present invention are shown and are described in detail as follows:

[0081] As Figure 2 shown, the device 2 for determining the photovoltaic power generation output power includes:

[0082] A data acquisition module 201, configured to acquire the total area power, the total user power consumption, and the total photovoltaic power generation corresponding to each area in the distribution network system.

[0083] A function construction module 202, configured to construct an objective function with the optimal line loss of the distribution network system as the optimization objective based on the total area power, the total user power consumption, and the total photovoltaic power generation.

[0084] A power determination module 203, configured to perform iterative solution on an objective function based on a preset algorithm to obtain the optimal output power of photovoltaic power generation for each substation area in the distribution network system.

[0085] An embodiment of the present invention provides a device for determining the output power of photovoltaic power generation, including: a data acquisition module 201, a function construction module 202, and a power determination module 203. By using the total power of each substation area, the total power of user electricity consumption, and the total power of photovoltaic power generation in the distribution network system as variables, and performing optimization solution on the objective function constructed with the optimal line loss of the distribution network system as the optimization target based on a preset algorithm, the optimal output power of photovoltaic power generation for each substation area when the line loss of the distribution network system is optimal is obtained, which not only satisfies the optimal line loss of the distribution network system, but also can effectively control the output power of photovoltaic power generation, thereby effectively ensuring the safety and economy of the operation of the distribution network.

[0086] In a possible implementation manner, the objective function in the function construction module 202 includes:

[0087]

[0088] Wherein, f represents the objective function, min represents the minimum value function, and ΔP loss represents the line loss of the distribution network system, i represents the i-th substation area in the distribution network system, n represents the first total number of all substation areas in the distribution network system, P iZ represents the total power of the i-th substation area, j represents the j-th electricity-consuming user in the substation area, m represents the second total number of all electricity-consuming users in the substation area, P ijY represents the electricity consumption power of the j-th electricity-consuming user in the i-th substation area, s represents the s-th photovoltaic power generation user in the substation area, a represents the third total number of all photovoltaic power generation users in the substation area, and P isG represents the photovoltaic power generation power of the s-th photovoltaic power generation user in the i-th substation area.

[0089] In a possible implementation manner, the power determination module 203 is specifically configured to:

[0090] Calculate the system line loss value of the distribution network system based on the total power of all substation areas, the total power of user electricity consumption, and the total power of photovoltaic power generation in the distribution network system.

[0091] When there is no power transmission from each substation area and the total power of photovoltaic power generation does not reach the preset power threshold, adjust the power generation power of the photovoltaic power generation users in each substation area based on the system line loss value, and determine the new total power of photovoltaic power generation according to the adjusted power generation power of the photovoltaic power generation users.

[0092] Re - execute the operation of "collecting the total power of each sub - region, the total power consumption of users, and the total photovoltaic power generation corresponding to each sub - region in the distribution network system" in the data acquisition module 201 and subsequent operations.

[0093] Until the outgoing power appears in each sub - region or the total photovoltaic power generation reaches the preset power threshold, determine the optimal output power of photovoltaic power generation for each sub - region in the distribution network system based on the total photovoltaic power generation of each current sub - region and the total power consumption of users in that sub - region.

[0094] In a possible implementation manner, the power determination module 203 is specifically configured to:

[0095] Calculate the difference between the total photovoltaic power generation of each current sub - region and the total power consumption of users in that sub - region.

[0096] Determine the optimal output power of photovoltaic power generation for each sub - region in the distribution network system based on the difference and the preset difference.

[0097] In a possible implementation manner, the power determination module 203 is specifically configured to:

[0098] Judge whether the difference is less than the preset threshold.

[0099] When the difference is not less than the preset difference, use the photovoltaic power generation power corresponding to the outgoing power appearing in each sub - region or the preset power threshold as the optimal output power of photovoltaic power generation for each sub - region in the distribution network system.

[0100] In a possible implementation manner, the power determination module 203 is specifically configured to:

[0101] When the difference is less than the preset difference, readjust the power generation power of the current photovoltaic power generation users in each sub - region, and determine the latest total photovoltaic power generation based on the readjusted power generation power of the photovoltaic power generation users.

[0102] Re - execute the operation of "collecting the total power of each sub - region, the total power consumption of users, and the total photovoltaic power generation corresponding to each sub - region in the distribution network system" in the data acquisition module 201 and subsequent operations.

[0103] Figure 3 It is a schematic diagram of the electronic device provided by the embodiment of the present invention. As Figure 3 shown, the electronic device 3 of this embodiment includes: a processor 30, a memory 31, and a computer program 32 stored in the memory 31 and executable on the processor 30. When the processor 30 executes the computer program 32, it implements the steps in the above - mentioned embodiments of the method for determining the photovoltaic power generation output power, for example Figure 1Steps 101 to 103 shown. Alternatively, when the processor 30 executes the computer program 32, it implements the functions of each module in the above device embodiments. For example Figure 2 the functions of the modules 201 to 203 shown.

[0104] Exemplarily, the computer program 32 can be divided into one or more modules / units. The one or more modules / units are stored in the memory 31 and executed by the processor 30 to complete the present invention. The one or more modules / units can be a series of computer program instruction segments capable of performing specific functions, and these instruction segments are used to describe the execution process of the computer program 32 in the electronic device 3. For example, the computer program 32 can be divided into Figure 2 the modules 201 to 203 shown.

[0105] The electronic device 3 can be a computing device such as a desktop computer, a notebook, a palm computer, and a cloud server. The electronic device 3 may include, but is not limited to, a processor 30 and a memory 31. Those skilled in the art can understand that Figure 3 merely examples of the electronic device 3, which do not constitute a limitation on the electronic device 3. It may include more or fewer components than shown in the figure, or combine certain components, or different components. For example, the electronic device may further include input / output devices, network access devices, a bus, etc.

[0106] The so-called processor 30 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. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0107] The memory 31 may be an internal storage unit of the electronic device 3, such as a hard disk or memory of the electronic device 3. The memory 31 may also be an external storage device of the electronic device 3, such as a plug-in hard disk equipped on the electronic device 3, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. Further, the memory 31 may also include both the internal storage unit of the electronic device 3 and the external storage device. The memory 31 is used to store the computer program and other programs and data required by the electronic device. The memory 31 may also be used to temporarily store the data that has been output or will be output.

[0108] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, only the above division of each functional unit and module is used as an example. In actual applications, the above functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction and do not limit the protection scope of this application. The specific working process of the units and modules in the above system can refer to the corresponding process in the foregoing method embodiment and will not be described herein again.

[0109] In addition, an embodiment of the present invention also provides a system for determining the photovoltaic power generation output power. Figure 4 FIG. [FIGURE NUMBER] is a schematic structural diagram of the system for determining the photovoltaic power generation output power provided by the embodiment of the present invention. As Figure 4 shown, the system 4 for determining the photovoltaic power generation output power includes: the electronic device 3 as described in the third aspect above, and further includes: a collection device 401 corresponding to each substation area in the distribution network system.

[0110] One end of the collection device 401 is connected to the electronic device 3, and the other end is connected to the substation area watt-hour meter, the first watt-hour meter of each electricity user, and the second watt-hour meter of each photovoltaic power generation user in the corresponding substation area, and is used to collect the total power of the substation area, the total power of user electricity consumption, and the total power of photovoltaic power generation corresponding to each substation area in the distribution network system.

[0111] In this embodiment, as Figure 4As shown in the figure, for each substation area within the distribution network system, there corresponds a collection device 401. The collection device 401 based on the substation area watt-hour meter in real time collects the total power of each substation area, based on the first watt-hour meter in real time collects the user power consumption of all electricity users under each substation area, and calculates the total user power consumption of the electricity users under this substation area, and based on the second watt-hour meter in real time collects the photovoltaic power generation of all photovoltaic power generation users under each substation area, and calculates the total photovoltaic power generation of the photovoltaic power generation users under this substation area. In addition, by way of example, the collection device 401 can also be used to upload the various power data collected and calculated in real time to the electronic device 3, which is conducive to the electronic device 3 based on these power data to optimize the total photovoltaic power generation of each substation area according to the optimal line loss of the distribution network system.

[0112] An embodiment of the present invention provides a system for determining the output power of photovoltaic power generation, including: an electronic device 3 and a collection device 401 corresponding to each substation area in the distribution network system. By using the total power of each substation area, the total user power consumption, and the total photovoltaic power generation in the distribution network system as variables, and based on a preset algorithm, the objective function constructed with the optimal line loss of the distribution network system as the optimization target is optimized and solved, so as to obtain the optimal output power of photovoltaic power generation for each substation area when the line loss of the distribution network system is optimal, which not only satisfies the optimal line loss of the distribution network system, but also can effectively control the output power of photovoltaic power generation, thereby effectively ensuring the safety and economy of the operation of the distribution network.

[0113] In the above embodiments, the descriptions of each embodiment have their own emphases. For parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0114] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or by a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of the present invention.

[0115] In the embodiments provided by the present invention, it should be understood that the disclosed device / electronic device and method can be implemented in other ways. For example, the device / electronic device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of the devices or units can be in electrical, mechanical or other forms.

[0116] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0117] In addition, in each embodiment of the present invention, the functional units can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0118] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, to implement all or part of the processes in the above method embodiments of the present invention, it can also be completed by a computer program instructing relevant hardware. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above method embodiments for determining the photovoltaic power generation output power can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the content included in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0119] The above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A method for determining the output power of photovoltaic power generation, characterized in that, Including: Collecting the total power of each substation area, the total power consumption of users, and the total power generation of photovoltaic power generation in the distribution network system; Based on the total power of the substation area, the total power consumption of users, and the total power generation of photovoltaic power generation, constructing an objective function with the optimal line loss of the distribution network system as the optimization goal; Based on a preset algorithm, solving and iterating the objective function to obtain the optimal output power of photovoltaic power generation in each substation area of the distribution network system; The objective function includes: Among them, f represents the objective function, min represents the minimum value function, and ΔP loss represents the line loss of the distribution network system, i represents the i-th substation area in the distribution network system, n represents the first total number of all substation areas in the distribution network system, and P iZ represents the total power of the i-th substation area, j represents the j-th electricity user in the substation area, m represents the second total number of all electricity users in the substation area, and P ijY represents the electricity consumption power of the j-th electricity user in the i-th substation area, s represents the s-th photovoltaic power generation user in the substation area, a represents the third total number of all photovoltaic power generation users in the substation area, and P isG represents the photovoltaic power generation power of the s-th photovoltaic power generation user in the i-th substation area; The step of solving and iterating the objective function based on a preset algorithm to obtain the optimal output power of photovoltaic power generation in each substation area of the distribution network system includes: Calculating the system line loss value of the distribution network system based on the total power of each substation area, the total power consumption of users, and the total power generation of photovoltaic power generation in all substation areas of the distribution network system; When there is no power output from each substation area and the total power generation of photovoltaic power generation does not reach the preset power threshold, adjusting the power generation power of photovoltaic power generation users in each substation area based on the system line loss value, and determining a new total power generation of photovoltaic power generation according to the adjusted power generation power of photovoltaic power generation users; Re-executing the steps of "collecting the total power of each substation area, the total power consumption of users, and the total power generation of photovoltaic power generation in the distribution network system" and subsequent steps; Until there is power output from each substation area or the total power generation of photovoltaic power generation reaches the preset power threshold, determining the optimal output power of photovoltaic power generation in each substation area of the distribution network system based on the current total power generation of photovoltaic power generation in each substation area and the total power consumption of users in that substation area.

2. The method for determining the output power of photovoltaic power generation according to claim 1, characterized in that, The step of determining the optimal output power of photovoltaic power generation in each substation area of the distribution network system based on the current total power generation of photovoltaic power generation in each substation area and the total power consumption of users in that substation area includes: Calculating the difference between the current total power generation of photovoltaic power generation in each substation area and the total power consumption of users in that substation area; Based on the difference and a preset difference, determining the optimal output power of photovoltaic power generation in each substation area of the distribution network system.

3. The method for determining the output power of photovoltaic power generation according to claim 2, characterized in that, The step of determining the optimal output power of photovoltaic power generation in each substation area of the distribution network system based on the difference and a preset difference includes: Judging whether the difference is less than the preset difference; When the difference is not less than the preset difference, using the photovoltaic power generation power corresponding to the power output from each substation area or the preset power threshold as the optimal output power of photovoltaic power generation in each substation area of the distribution network system.

4. The method for determining the output power of photovoltaic power generation according to claim 3, characterized in that, After judging whether the difference is less than the preset difference, it further includes: When the difference is less than the preset difference, readjusting the power generation power of the current photovoltaic power generation users in each substation area, and determining the latest total power generation of photovoltaic power generation according to the readjusted power generation power of photovoltaic power generation users; Re-executing the steps of "collecting the total power of each substation area, the total power consumption of users, and the total power generation of photovoltaic power generation in the distribution network system" and subsequent steps.

5. A device for determining the output power of photovoltaic power generation, characterized in that, Including: A data acquisition module for collecting the total power of each substation area, the total power consumption of users, and the total power generation of photovoltaic power generation in the distribution network system; A function construction module, configured to construct an objective function with the optimal line loss of the distribution network system as the optimization objective based on the total power of the substation area, the total power consumption of users, and the total photovoltaic power generation; A power determination module, configured to perform iterative solution on the objective function based on a preset algorithm to obtain the optimal output power of photovoltaic power generation for each substation area in the distribution network system; The objective function in the function construction module includes: Among them, f represents the objective function, min represents the minimum value function, and ΔP loss represents the line loss of the distribution network system, i represents the i-th substation area in the distribution network system, n represents the first total number of all substation areas in the distribution network system, and P iZ represents the total power of the i-th substation area, j represents the j-th electricity user in the substation area, m represents the second total number of all electricity users in the substation area, and P ijY represents the electricity consumption power of the j-th electricity user in the i-th substation area, s represents the s-th photovoltaic power generation user in the substation area, a represents the third total number of all photovoltaic power generation users in the substation area, and P isG represents the photovoltaic power generation power of the s-th photovoltaic power generation user in the i-th substation area; The power determination module is specifically configured to: Calculate the system line loss value of the distribution network system based on the total power of the substation area, the total power consumption of users, and the total photovoltaic power generation in all substation areas of the distribution network system; When there is no power transmission from each substation area and the total photovoltaic power generation does not reach the preset power threshold, adjust the power generation power of photovoltaic power generation users in each substation area based on the system line loss value, and determine the new total photovoltaic power generation based on the adjusted power generation power of photovoltaic power generation users; Re-execute the steps of "collecting the total power of the substation area, the total power consumption of users, and the total photovoltaic power generation corresponding to each substation area in the distribution network system" and subsequent steps in the data collection module; Until there is power transmission from each substation area or the total photovoltaic power generation reaches the preset power threshold, determine the optimal output power of photovoltaic power generation for each substation area in the distribution network system based on the current total photovoltaic power generation of each substation area and the total power consumption of users in that substation area.

6. An electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 4 above.

7. A system for determining the output power of photovoltaic power generation, characterized in that, Including: The electronic device according to claim 6 further includes: a collection device corresponding to each substation area in the distribution network system; The first end of the collection device is connected to the electronic device, and the second end is connected to the substation area electric energy meter in the corresponding substation area, the first electric energy meter of each electricity user, and the second electric energy meter of each photovoltaic power generation user, and is configured to collect the total power of the substation area, the total power consumption of users, and the total photovoltaic power generation corresponding to each substation area in the distribution network system.

8. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the method according to any one of claims 1 to 4 above.

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