Distributed photovoltaic group dispatching and group control method, system and program product

Abstract

The invention belongs to the technical field of photovoltaic regulation and control, and particularly discloses a distributed photovoltaic group regulation and group control method, a distributed photovoltaic group regulation and group control system and a program product. Real-time output parameters and real-time environment parameters of all distributed photovoltaic power stations in the distributed photovoltaic cluster are collected in real time for power evaluation and analysis, the adjusting power of all the distributed photovoltaic power stations is determined, and then corresponding power adjusting control parameters are generated and synchronously sent to all the distributed photovoltaic power stations; efficient distributed photovoltaic group dispatching and group control are realized, and the load requirement of a power grid is met. According to the invention, real-time distributed photovoltaic cluster automatic power generation regulation and control can be carried out according to the power grid load demand, the power grid load is timely and effectively balanced, the condition of power grid overload or insufficient power supply is avoided, and the economical efficiency and stability of a photovoltaic cluster power supply system are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of photovoltaic regulation and control, and specifically relates to a distributed photovoltaic group regulation and control method, system and program product. Background Art

[0002] With the vigorous development of smart grid and green energy generation technology, the application of distributed photovoltaic power generation in power systems is increasing. Distributed photovoltaic power generation system usually refers to the distributed photovoltaic power generation cluster composed of small-scale photovoltaic power stations near users and connected to the grid. Distributed photovoltaic power station clusters are widely used, such as photovoltaic power generation projects built on the roofs of urban buildings. This cluster method helps to increase the power generation of photovoltaic power stations of the same scale, and solves the problem of power loss in boosting and long-distance transportation, and realizes nearby power generation, nearby grid connection, nearby conversion, and nearby use. However, in the operation and use of distributed photovoltaic power station clusters, how to effectively control the power generation of distributed photovoltaic clusters to dynamically balance the load of the power grid and improve the economy and stability of photovoltaic cluster power supply has become an urgent problem to be solved. Summary of the invention

[0003] The purpose of the present invention is to provide a distributed photovoltaic group control method, system and program product to solve the above-mentioned problems existing in the prior art.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] In a first aspect, a distributed photovoltaic group control method is provided, comprising:

[0006] Obtain real-time grid load demand information, and determine the target output power of the photovoltaic cluster based on the real-time grid load demand information;

[0007] Collecting real-time output parameters and real-time environmental parameters of each distributed photovoltaic power station in the distributed photovoltaic cluster, the real-time output parameters include real-time sampled output current and real-time sampled output voltage, and the environmental parameters include real-time site temperature and real-time site light intensity;

[0008] Calculate the real-time output power of each distributed photovoltaic power station based on the real-time sampled output current and real-time sampled output voltage, and estimate the real-time peak power of each distributed photovoltaic power station based on the real-time site temperature and real-time site light intensity;

[0009] Determine the real-time total power of the photovoltaic cluster according to the real-time output power of each distributed photovoltaic power station, and calculate the increaseable power of each distributed photovoltaic power station according to the real-time output power and real-time peak power;

[0010] The power difference is calculated using the real-time total power of the photovoltaic cluster and the target output power of the photovoltaic cluster, and when the power difference is negative, the first adjustment power of each distributed photovoltaic power station is determined according to the power difference and the real-time output power and the increaseable power of each distributed photovoltaic power station;

[0011] Generate a first power regulation control parameter corresponding to each distributed photovoltaic power station according to the first regulation power of each distributed photovoltaic power station;

[0012] Each first power regulation control parameter is synchronously sent to the corresponding distributed photovoltaic power station, so that each distributed photovoltaic power station adjusts the power generation according to the received first power regulation control parameter.

[0013] In one possible design, when the power difference is positive, the method further includes:

[0014] Calculate the second regulating power of each distributed photovoltaic power station according to the power difference, the real-time total power of the photovoltaic cluster and the real-time output power of each distributed photovoltaic power station;

[0015] Generating a second power regulation control parameter corresponding to each distributed photovoltaic power station according to the second regulation power of each distributed photovoltaic power station;

[0016] Each second power regulation control parameter is synchronously sent to the corresponding distributed photovoltaic power station, so that each distributed photovoltaic power station adjusts the power generation according to the received second power regulation control parameter.

[0017] In a possible design, the second adjustment power of each distributed photovoltaic power station is calculated according to the power difference, the real-time total power of the photovoltaic cluster and the real-time output power of each distributed photovoltaic power station, including:

[0018] Calculate the ratio of the real-time output power of each distributed photovoltaic power station to the real-time total power of the photovoltaic cluster, and use the ratio as the adjustment weight of the corresponding distributed photovoltaic power station;

[0019] The power difference is multiplied by the regulation weight of each distributed photovoltaic power station to obtain the second regulation power of each distributed photovoltaic power station.

[0020] In a possible design, estimating the real-time peak power of each distributed photovoltaic power station according to the real-time site temperature and the real-time site light intensity includes:

[0021] Retrieving reference power generation and impact factor data of the corresponding distributed photovoltaic power station within a set historical time period, wherein the impact factor data includes a light intensity impact factor curve graph and a temperature impact factor curve graph;

[0022] Substitute the real-time site temperature of the corresponding distributed photovoltaic power station into the temperature influence factor curve chart for calibration to determine the corresponding temperature influence factor; substitute the real-time site light intensity of the corresponding distributed photovoltaic power station into the light intensity influence factor curve chart for calibration to determine the corresponding light intensity influence factor;

[0023] The real-time peak power of the corresponding distributed photovoltaic power station is calculated according to the reference power generation power, temperature influence factor and light intensity influence factor, wherein the real-time peak power = reference power generation power × temperature influence factor × light intensity influence factor.

[0024] In a possible design, the method of calculating the increaseable power of each distributed photovoltaic power station according to the real-time output power and the real-time peak power includes:

[0025] Retrieve the power loss index of each distributed photovoltaic power station;

[0026] The increaseable power of each distributed photovoltaic power station is calculated according to the real-time output power, the real-time peak power and the power loss index, wherein the increaseable power=(real-time peak power-real-time output power)×power loss index.

[0027] In a possible design, determining the first adjustment power of each distributed photovoltaic power station according to the power difference and the real-time output power and the increaseable power of each distributed photovoltaic power station includes:

[0028] Divide the increaseable power of each distributed photovoltaic power station by its real-time output power to obtain the corresponding increase ratio;

[0029] The distributed photovoltaic power stations with the highest incremental ratio are taken as target distributed photovoltaic power stations, and the remaining distributed photovoltaic power stations are taken as non-target distributed photovoltaic power stations, and the sum of the increaseable power of all target distributed photovoltaic power stations is greater than or equal to the power difference;

[0030] The power difference is divided by the sum of the increaseable powers of all target distributed photovoltaic power stations to obtain the regulation ratio;

[0031] The increaseable power of the corresponding target distributed photovoltaic power station is multiplied by the adjustment ratio to obtain the first adjustment power of the corresponding target distributed photovoltaic power station, and the first adjustment power of each non-target distributed photovoltaic power station is set to 0.

[0032] In a possible design, determining the first adjustment power of each distributed photovoltaic power station according to the power difference and the real-time output power and the increaseable power of each distributed photovoltaic power station includes:

[0033] Divide the increaseable power of each distributed photovoltaic power station by its real-time output power to obtain the corresponding increase ratio;

[0034] The distributed photovoltaic power stations whose increment ratio exceeds the set threshold are regarded as target distributed photovoltaic power stations, and the remaining distributed photovoltaic power stations are regarded as non-target distributed photovoltaic power stations;

[0035] When the sum of the increaseable powers of all target distributed photovoltaic power stations is less than the power difference, several non-target distributed photovoltaic power stations with the highest increaseable powers are updated to target distributed photovoltaic power stations, so that the sum of the increaseable powers of all target distributed photovoltaic power stations is greater than or equal to the power difference;

[0036] The power difference is divided by the sum of the increaseable powers of all target distributed photovoltaic power stations to obtain the regulation ratio;

[0037] The increaseable power of the corresponding target distributed photovoltaic power station is multiplied by the adjustment ratio to obtain the first adjustment power of the corresponding target distributed photovoltaic power station, and the first adjustment power of each non-target distributed photovoltaic power station is set to 0.

[0038] In a second aspect, a distributed photovoltaic group control system is provided, including a demand determination unit, a parameter acquisition unit, a first calculation unit, a second calculation unit, a power control unit, a parameter generation unit and a group control execution unit, wherein:

[0039] A demand determination unit is used to obtain real-time grid load demand information and determine the target output power of the photovoltaic cluster according to the real-time grid load demand information;

[0040] A parameter collection unit, used to collect real-time output parameters and real-time environmental parameters of each distributed photovoltaic power station in the distributed photovoltaic cluster, wherein the real-time output parameters include real-time sampled output current and real-time sampled output voltage, and the environmental parameters include real-time site temperature and real-time site light intensity;

[0041] A first calculation unit is used to calculate the real-time output power of each distributed photovoltaic power station according to the real-time sampled output current and the real-time sampled output voltage, and estimate the real-time peak power of each distributed photovoltaic power station according to the real-time site temperature and the real-time site light intensity;

[0042] The second calculation unit is used to determine the real-time total power of the photovoltaic cluster according to the real-time output power of each distributed photovoltaic power station, and calculate the increaseable power of each distributed photovoltaic power station according to the real-time output power and the real-time peak power;

[0043] A power control unit is used to calculate the power difference by using the real-time total power of the photovoltaic cluster and the target output power of the photovoltaic cluster, and when the power difference is negative, determine the first adjustment power of each distributed photovoltaic power station according to the power difference and the real-time output power and the increaseable power of each distributed photovoltaic power station;

[0044] A parameter generating unit, configured to generate a first power regulating control parameter corresponding to each distributed photovoltaic power station according to the first regulating power of each distributed photovoltaic power station;

[0045] The group control execution unit is used to synchronously send each first power regulation control parameter to the corresponding distributed photovoltaic power station, so that each distributed photovoltaic power station adjusts the power generation according to the received first power regulation control parameter.

[0046] In a third aspect, a distributed photovoltaic group control system is provided, including:

[0047] A memory for storing instructions;

[0048] A processor is used to read the instructions stored in the memory and execute any one of the methods described in the first aspect according to the instructions.

[0049] In a fourth aspect, a computer-readable storage medium is provided, wherein instructions are stored on the computer-readable storage medium, and when the instructions are executed on a computer, the computer executes any one of the methods described in the first aspect. In addition, a computer program product is provided, and when the computer program product is executed on a computer, the computer executes any one of the methods described in the first aspect.

[0050] Beneficial effects: The present invention determines the target output power of the photovoltaic cluster by acquiring the load demand of the power grid, and collects the real-time output parameters and real-time environmental parameters of each distributed photovoltaic power station in the distributed photovoltaic cluster in real time for power evaluation and analysis, determines the adjustment power of each distributed photovoltaic power station, and then generates corresponding power adjustment control parameters and sends them to each distributed photovoltaic power station synchronously, so as to achieve efficient distributed photovoltaic group adjustment and control and meet the load demand of the power grid. The present invention can perform real-time distributed photovoltaic cluster automatic power generation regulation and control according to the load demand of the power grid, so as to balance the load of the power grid in a timely and effective manner, avoid the situation of power grid overload or insufficient power supply, and improve the economy and stability of the photovoltaic cluster power supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0052] Figure 1 This is a schematic diagram of the steps of the method in Example 1 of the present invention;

[0053] Figure 2 This is a schematic diagram of the structure of the system in Example 2 of the present invention;

[0054] Figure 3 Schematic diagram of the system structure in Example 3 of the present invention. DETAILED DESCRIPTION

[0055] It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. The specific structures and functional details disclosed herein are only used to describe the exemplary embodiments of the present invention. However, the present invention can be embodied in many alternative forms, and it should not be understood that the present invention is limited to the embodiments set forth herein.

[0056] It should be understood that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments can be understood according to specific circumstances.

[0057] In the following description, certain details are provided to facilitate a complete understanding of the example embodiments. However, it will be appreciated by those of ordinary skill in the art that the example embodiments may be implemented without these certain details. For example, devices may be shown in block diagrams to avoid obscuring the examples with unnecessary details. In other embodiments, well-known processes, structures, and techniques may not be shown in unnecessary detail to avoid obscuring the embodiments.

[0058] Embodiment 1:

[0059] This embodiment provides a distributed photovoltaic group control method, which can be applied to a corresponding AGC (Automatic Generation Control) system, wherein the AGC system establishes data connection with each distributed photovoltaic power station in the distributed photovoltaic cluster. Figure 1 As shown, the method comprises the following steps:

[0060] S1. Obtain real-time grid load demand information, and determine the target output power of the photovoltaic cluster based on the real-time grid load demand information.

[0061] In specific implementation, the AGC system first obtains real-time grid load demand information, and then determines the target output power of the photovoltaic cluster at the corresponding power generation end (ie, the distributed photovoltaic cluster) based on the real-time grid load demand information.

[0062] S2. Collect the real-time output parameters and real-time environmental parameters of each distributed photovoltaic power station in the distributed photovoltaic cluster, the real-time output parameters include real-time sampled output current and real-time sampled output voltage, and the environmental parameters include real-time site temperature and real-time site light intensity.

[0063] During specific implementation, the AGC system collects real-time output parameters and real-time environmental parameters of each distributed photovoltaic power station through a data interaction channel with each distributed photovoltaic power station in the distributed photovoltaic cluster. The real-time output parameters include real-time sampled output current and real-time sampled output voltage, and the environmental parameters include real-time site temperature and real-time site light intensity.

[0064] S3. Calculate the real-time output power of each distributed photovoltaic power station based on the real-time sampled output current and the real-time sampled output voltage, and estimate the real-time peak power of each distributed photovoltaic power station based on the real-time site temperature and the real-time site light intensity.

[0065] In specific implementation, the AGC system can multiply the corresponding real-time sampled output current by the real-time sampled output voltage to obtain the real-time output power of each distributed photovoltaic power station. Then retrieve the reference power generation and influence factor data of the corresponding distributed photovoltaic power station in the set historical time period, such as the most recent week, and the influence factor data includes the light intensity influence factor curve and the temperature influence factor curve; then substitute the real-time site temperature of the corresponding distributed photovoltaic power station into the temperature influence factor curve for calibration to determine the corresponding temperature influence factor, substitute the real-time site illumination intensity of the corresponding distributed photovoltaic power station into the light intensity influence factor curve for calibration to determine the corresponding light intensity influence factor; finally, calculate the real-time peak power of the corresponding distributed photovoltaic power station based on the reference power generation, temperature influence factor and light intensity influence factor, where real-time peak power = reference power generation × temperature influence factor × light intensity influence factor.

[0066] S4. Determine the real-time total power of the photovoltaic cluster according to the real-time output power of each distributed photovoltaic power station, and calculate the increaseable power of each distributed photovoltaic power station according to the real-time output power and the real-time peak power.

[0067] In specific implementation, the AGC system can summarize the real-time output power of each distributed photovoltaic power station and statistically determine the real-time total power of the distributed photovoltaic cluster. The distributed photovoltaic cluster is composed of multiple distributed photovoltaic stations. Therefore, the total power of the cluster is generally the sum of the power of each distributed photovoltaic station. Then, the power loss index of each distributed photovoltaic power station is retrieved, and the increaseable power of each distributed photovoltaic power station is calculated based on the real-time output power, real-time peak power and power loss index, where the increaseable power = (real-time peak power - real-time output power) × power loss index.

[0068] S5. Calculate the power difference using the real-time total power of the photovoltaic cluster and the target output power of the photovoltaic cluster, and when the power difference is negative, determine the first adjustment power of each distributed photovoltaic power station according to the power difference and the real-time output power and increaseable power of each distributed photovoltaic power station.

[0069] In specific implementation, the AGC system can calculate the power difference by subtracting the target output power of the photovoltaic cluster from the real-time total power of the photovoltaic cluster. When the power difference is 0, it indicates that the real-time total power of the photovoltaic cluster will just meet the subsequent grid load requirements, and there is no need to adjust the cluster's power generation power. When the power difference is negative, it indicates that the real-time total power of the photovoltaic cluster will not be able to meet the subsequent grid load requirements, and the cluster's power generation power needs to be increased. At this time:

[0070] The AGC system can divide the increaseable power of each distributed photovoltaic power station by its real-time output power to obtain the corresponding increment ratio; several distributed photovoltaic power stations with the highest increment ratio are used as target distributed photovoltaic power stations, and the remaining distributed photovoltaic power stations are used as non-target distributed photovoltaic power stations, and the sum of the increaseable power of all target distributed photovoltaic power stations is greater than or equal to the power difference; then the power difference is divided by the sum of the increaseable power of all target distributed photovoltaic power stations to obtain the adjustment ratio; the increaseable power of the corresponding target distributed photovoltaic power station is multiplied by the adjustment ratio to obtain the first adjustment power of the corresponding target distributed photovoltaic power station, and the first adjustment power of each non-target distributed photovoltaic power station is set to 0.

[0071] Alternatively, the AGC system can divide the increaseable power of each distributed photovoltaic power station by its real-time output power to obtain the corresponding increment ratio; the distributed photovoltaic power station whose increment ratio exceeds the set threshold is used as the target distributed photovoltaic power station, and the remaining distributed photovoltaic power stations are used as non-target distributed photovoltaic power stations; when the sum of the increaseable power of all target distributed photovoltaic power stations is less than the power difference, several non-target distributed photovoltaic power stations with the highest increaseable power are updated as target distributed photovoltaic power stations, so that the sum of the increaseable power of all target distributed photovoltaic power stations is greater than or equal to the power difference; then the power difference is divided by the sum of the increaseable power of all target distributed photovoltaic power stations to obtain the adjustment ratio; the increaseable power of the corresponding target distributed photovoltaic power station is multiplied by the adjustment ratio to obtain the first adjustment power of the corresponding target distributed photovoltaic power station, and the first adjustment power of each non-target distributed photovoltaic power station is set to 0.

[0072] When the power difference is positive, it indicates that the real-time total power of the photovoltaic cluster will exceed the subsequent grid load demand, and the cluster's power generation power needs to be reduced. At this time, the AGC system can calculate the second adjustment power of each distributed photovoltaic power station based on the power difference, the real-time total power of the photovoltaic cluster and the real-time output power of each distributed photovoltaic power station, including: calculating the ratio of the real-time output power of each distributed photovoltaic power station to the real-time total power of the photovoltaic cluster, and using the ratio as the adjustment weight of the corresponding distributed photovoltaic power station, and then multiplying the power difference by the adjustment weight of each distributed photovoltaic power station to obtain the second adjustment power of each distributed photovoltaic power station.

[0073] S6. Generate a first power regulation control parameter corresponding to each distributed photovoltaic power station according to the first regulation power of each distributed photovoltaic power station.

[0074] In specific implementation, the AGC system can generate the first power regulation control parameter corresponding to each distributed photovoltaic power station according to the first regulation power of each distributed photovoltaic power station, or generate the second power regulation control parameter corresponding to each distributed photovoltaic power station according to the second regulation power of each distributed photovoltaic power station.

[0075] S7. Synchronously sending each first power regulation control parameter to the corresponding distributed photovoltaic power station, so that each distributed photovoltaic power station regulates the power generation according to the received first power regulation control parameter.

[0076] In specific implementation, the AGC system synchronously sends each first power regulation control parameter to the corresponding distributed photovoltaic power station, so that each distributed photovoltaic power station adjusts the power generation according to the received first power regulation control parameter, that is, increases the power generation. Or it synchronously sends each second power regulation control parameter to the corresponding distributed photovoltaic power station, so that each distributed photovoltaic power station adjusts the power generation according to the received second power regulation control parameter, that is, reduces the power generation.

[0077] The photovoltaic power generation power of each distributed photovoltaic power station can be adjusted, and its power regulation is mainly achieved through several methods, including but not limited to maximum power point tracking technology (MPPT), series-parallel component technology, shadow compensation technology, inverter capacity regulation technology and energy storage technology. The combined application of these technologies can optimize and adjust the output power of the photovoltaic power generation system. In addition, there is a method of forming a closed-loop regulation through the automatic compensation device and the PF adjustment function of the inverter, and using an intelligent controller to continuously collect the power factor value on the smart meter, calculate the reactive power that needs to be configured for the entire system, and then send instructions to each inverter through the bus to achieve power factor adjustment. These methods together ensure that the power of the distributed photovoltaic power station can be adjusted and optimized as needed.

[0078] The method of this embodiment can perform real-time distributed photovoltaic cluster automatic power generation regulation according to the grid load demand, so as to balance the grid load in a timely and effective manner, avoid grid overload or power shortage, and improve the economy and stability of the photovoltaic cluster power supply system.

[0079] Embodiment 2:

[0080] This embodiment provides a distributed photovoltaic group control system. Figure 2 As shown, it includes a demand determination unit, a parameter acquisition unit, a first calculation unit, a second calculation unit, a power control unit, a parameter generation unit and a group control execution unit, wherein:

[0081] A demand determination unit is used to obtain real-time grid load demand information and determine the target output power of the photovoltaic cluster according to the real-time grid load demand information;

[0082] A parameter collection unit, used to collect real-time output parameters and real-time environmental parameters of each distributed photovoltaic power station in the distributed photovoltaic cluster, wherein the real-time output parameters include real-time sampled output current and real-time sampled output voltage, and the environmental parameters include real-time site temperature and real-time site light intensity;

[0083] A first calculation unit is used to calculate the real-time output power of each distributed photovoltaic power station according to the real-time sampled output current and the real-time sampled output voltage, and estimate the real-time peak power of each distributed photovoltaic power station according to the real-time site temperature and the real-time site light intensity;

[0084] The second calculation unit is used to determine the real-time total power of the photovoltaic cluster according to the real-time output power of each distributed photovoltaic power station, and calculate the increaseable power of each distributed photovoltaic power station according to the real-time output power and the real-time peak power;

[0085] A power control unit is used to calculate the power difference by using the real-time total power of the photovoltaic cluster and the target output power of the photovoltaic cluster, and when the power difference is negative, determine the first adjustment power of each distributed photovoltaic power station according to the power difference and the real-time output power and the increaseable power of each distributed photovoltaic power station;

[0086] A parameter generating unit, configured to generate a first power regulating control parameter corresponding to each distributed photovoltaic power station according to the first regulating power of each distributed photovoltaic power station;

[0087] The group control execution unit is used to synchronously send each first power regulation control parameter to the corresponding distributed photovoltaic power station, so that each distributed photovoltaic power station adjusts the power generation according to the received first power regulation control parameter.

[0088] Embodiment 3:

[0089] This embodiment provides a distributed photovoltaic group control system. Figure 3 As shown, at the hardware level, it includes:

[0090] Data interface, used to establish data connection between the processor and each distributed photovoltaic power station in the distributed photovoltaic cluster;

[0091] A memory for storing instructions;

[0092] The processor is used to read the instructions stored in the memory and execute the distributed photovoltaic group modulation and control method in Example 1 according to the instructions.

[0093] Optionally, the system further includes an internal bus, through which the processor, the memory and the data interface can be interconnected, and the internal bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc.

[0094] The memory may include, but is not limited to, random access memory (RAM), read only memory (ROM), flash memory, first input first output (FIFO) and / or first in last out (FILO) memory, etc. The processor may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0095] Embodiment 4:

[0096] This embodiment provides a computer-readable storage medium, on which instructions are stored, and when the instructions are executed on a computer, the computer executes the distributed photovoltaic group control method in Embodiment 1. The computer-readable storage medium refers to a carrier for storing data, which may include but is not limited to a floppy disk, an optical disk, a hard disk, a flash memory, a USB flash drive and / or a memory stick, etc., and the computer may be a general-purpose computer, a special-purpose computer, a computer network or other programmable device.

[0097] This embodiment also provides a computer program product, which, when executed on a computer, executes the distributed photovoltaic group control method in Embodiment 1. The computer may be a general-purpose computer, a special-purpose computer, a computer network or other programmable device.

[0098] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A distributed photovoltaic group control method, characterized in that: include: Obtain real-time grid load demand information, and determine the target output power of the photovoltaic cluster based on the real-time grid load demand information; Collecting real-time output parameters and real-time environmental parameters of each distributed photovoltaic power station in the distributed photovoltaic cluster, the real-time output parameters include real-time sampled output current and real-time sampled output voltage, and the environmental parameters include real-time site temperature and real-time site light intensity; Calculate the real-time output power of each distributed photovoltaic power station based on the real-time sampled output current and real-time sampled output voltage, and estimate the real-time peak power of each distributed photovoltaic power station based on the real-time site temperature and real-time site light intensity; Determine the real-time total power of the photovoltaic cluster according to the real-time output power of each distributed photovoltaic power station, and calculate the increaseable power of each distributed photovoltaic power station according to the real-time output power and real-time peak power; The power difference is calculated using the real-time total power of the photovoltaic cluster and the target output power of the photovoltaic cluster, and when the power difference is negative, the first adjustment power of each distributed photovoltaic power station is determined according to the power difference and the real-time output power and the increaseable power of each distributed photovoltaic power station; Generate a first power regulation control parameter corresponding to each distributed photovoltaic power station according to the first regulation power of each distributed photovoltaic power station; Each first power regulation control parameter is synchronously sent to the corresponding distributed photovoltaic power station, so that each distributed photovoltaic power station adjusts the power generation according to the received first power regulation control parameter.

2. A distributed photovoltaic group control method according to claim 1, characterized in that: When the power difference is positive, the method further comprises: Calculate the second regulating power of each distributed photovoltaic power station according to the power difference, the real-time total power of the photovoltaic cluster and the real-time output power of each distributed photovoltaic power station; Generating a second power regulation control parameter corresponding to each distributed photovoltaic power station according to the second regulation power of each distributed photovoltaic power station; Each second power regulation control parameter is synchronously sent to the corresponding distributed photovoltaic power station, so that each distributed photovoltaic power station adjusts the power generation according to the received second power regulation control parameter.

3. A distributed photovoltaic group control method according to claim 2, characterized in that: The calculating the second regulating power of each distributed photovoltaic power station according to the power difference, the real-time total power of the photovoltaic cluster and the real-time output power of each distributed photovoltaic power station includes: Calculate the ratio of the real-time output power of each distributed photovoltaic power station to the real-time total power of the photovoltaic cluster, and use the ratio as the adjustment weight of the corresponding distributed photovoltaic power station; The power difference is multiplied by the regulation weight of each distributed photovoltaic power station to obtain the second regulation power of each distributed photovoltaic power station.

4. A distributed photovoltaic group control method according to claim 1, characterized in that: The method of estimating the real-time peak power of each distributed photovoltaic power station according to the real-time site temperature and the real-time site light intensity includes: Retrieving reference power generation and impact factor data of the corresponding distributed photovoltaic power station within a set historical time period, wherein the impact factor data includes a light intensity impact factor curve graph and a temperature impact factor curve graph; Substitute the real-time site temperature of the corresponding distributed photovoltaic power station into the temperature influence factor curve chart for calibration to determine the corresponding temperature influence factor; substitute the real-time site light intensity of the corresponding distributed photovoltaic power station into the light intensity influence factor curve chart for calibration to determine the corresponding light intensity influence factor; The real-time peak power of the corresponding distributed photovoltaic power station is calculated according to the reference power generation power, temperature influence factor and light intensity influence factor, wherein the real-time peak power = reference power generation power × temperature influence factor × light intensity influence factor.

5. A distributed photovoltaic group control method according to claim 1, characterized in that: The method of calculating the increaseable power of each distributed photovoltaic power station according to the real-time output power and the real-time peak power includes: Retrieve the power loss index of each distributed photovoltaic power station; The increaseable power of each distributed photovoltaic power station is calculated according to the real-time output power, the real-time peak power and the power loss index, wherein the increaseable power=(real-time peak power-real-time output power)×power loss index.

6. A distributed photovoltaic group control method according to claim 1, characterized in that: The method of determining the first adjustment power of each distributed photovoltaic power station according to the power difference and the real-time output power and the increaseable power of each distributed photovoltaic power station comprises: Divide the increaseable power of each distributed photovoltaic power station by its real-time output power to obtain the corresponding increase ratio; The distributed photovoltaic power stations with the highest incremental ratio are taken as target distributed photovoltaic power stations, and the remaining distributed photovoltaic power stations are taken as non-target distributed photovoltaic power stations, and the sum of the increaseable power of all target distributed photovoltaic power stations is greater than or equal to the power difference; The power difference is divided by the sum of the increaseable powers of all target distributed photovoltaic power stations to obtain the regulation ratio; The increaseable power of the corresponding target distributed photovoltaic power station is multiplied by the adjustment ratio to obtain the first adjustment power of the corresponding target distributed photovoltaic power station, and the first adjustment power of each non-target distributed photovoltaic power station is set to 0.

7. A distributed photovoltaic group control method according to claim 1, characterized in that: The method of determining the first adjustment power of each distributed photovoltaic power station according to the power difference and the real-time output power and the increaseable power of each distributed photovoltaic power station comprises: Divide the increaseable power of each distributed photovoltaic power station by its real-time output power to obtain the corresponding increase ratio; The distributed photovoltaic power stations whose increment ratio exceeds the set threshold are regarded as target distributed photovoltaic power stations, and the remaining distributed photovoltaic power stations are regarded as non-target distributed photovoltaic power stations; When the sum of the increaseable powers of all target distributed photovoltaic power stations is less than the power difference, several non-target distributed photovoltaic power stations with the highest increaseable powers are updated to target distributed photovoltaic power stations, so that the sum of the increaseable powers of all target distributed photovoltaic power stations is greater than or equal to the power difference; The power difference is divided by the sum of the increaseable powers of all target distributed photovoltaic power stations to obtain the regulation ratio; The increaseable power of the corresponding target distributed photovoltaic power station is multiplied by the adjustment ratio to obtain the first adjustment power of the corresponding target distributed photovoltaic power station, and the first adjustment power of each non-target distributed photovoltaic power station is set to 0.

8. A distributed photovoltaic group control system, characterized in that: It includes a demand determination unit, a parameter acquisition unit, a first calculation unit, a second calculation unit, a power control unit, a parameter generation unit and a group control execution unit, wherein: A demand determination unit is used to obtain real-time grid load demand information and determine the target output power of the photovoltaic cluster according to the real-time grid load demand information; A parameter collection unit, used to collect real-time output parameters and real-time environmental parameters of each distributed photovoltaic power station in the distributed photovoltaic cluster, wherein the real-time output parameters include real-time sampled output current and real-time sampled output voltage, and the environmental parameters include real-time site temperature and real-time site light intensity; A first calculation unit is used to calculate the real-time output power of each distributed photovoltaic power station according to the real-time sampled output current and the real-time sampled output voltage, and estimate the real-time peak power of each distributed photovoltaic power station according to the real-time site temperature and the real-time site light intensity; The second calculation unit is used to determine the real-time total power of the photovoltaic cluster according to the real-time output power of each distributed photovoltaic power station, and calculate the increaseable power of each distributed photovoltaic power station according to the real-time output power and the real-time peak power; A power control unit is used to calculate the power difference by using the real-time total power of the photovoltaic cluster and the target output power of the photovoltaic cluster, and when the power difference is negative, determine the first adjustment power of each distributed photovoltaic power station according to the power difference and the real-time output power and the increaseable power of each distributed photovoltaic power station; A parameter generating unit, configured to generate a first power regulating control parameter corresponding to each distributed photovoltaic power station according to the first regulating power of each distributed photovoltaic power station; The group control execution unit is used to synchronously send each first power regulation control parameter to the corresponding distributed photovoltaic power station, so that each distributed photovoltaic power station adjusts the power generation according to the received first power regulation control parameter.

9. A distributed photovoltaic group control system, characterized in that: include: A memory for storing instructions; A processor is used to read the instructions stored in the memory and execute the distributed photovoltaic group control method according to any one of claims 1 to 7 according to the instructions.

10. A computer program product, characterized in that When the computer program product is run on a computer, the distributed photovoltaic group regulation and control method according to any one of claims 1 to 7 is executed.

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