Photovoltaic power station active power regulation method and computer equipment

Abstract

The present invention relates to the field of clean energy technology, and discloses a photovoltaic power station active power regulation method and computer equipment. The photovoltaic power station active power regulation method is applied to an AGC system of a target photovoltaic station. The photovoltaic power station active power regulation method comprises: upon receiving an active power regulation instruction, obtaining a grid-connected point active power sequence before a preset time period; selecting a target power value from the grid-connected point active power sequence based on a power regulation type of the active power regulation instruction as an initial active power regulation value; superimposing the initial active power regulation value on an active power regulation amount and calculating and allocating the result to a target inverter; the target power value can reflect the accurate power value of the photovoltaic station when power light resources fluctuate greatly or when there is a delay in the communication system, thereby avoiding the problem of inaccurate active power change rate caused by inaccurate acquired active power value, and thus avoiding the problem of being assessed.

Description

Technical Field

[0001] The present invention relates to the field of clean energy technology, and in particular to a photovoltaic power station active power regulation method and computer equipment. Background Art

[0002] According to the "GB / T19964-2012 Technical Regulations for the Connection of Photovoltaic Power Stations to the Power System", in photovoltaic grid-connected power generation systems, the 1-minute and 10-minute active power change rates are important indicators for grid stability assessment; among them, the 1-minute change rate refers to the maximum change in the active power of the photovoltaic power station within 1 minute ≤ 10% of the installed capacity; the 10-minute change rate refers to the maximum change in the active power of the photovoltaic power station within 10 minutes ≤ 30% of the installed capacity, which is used to limit the fluctuation range of the output power of the photovoltaic power station and ensure the safe operation of the power grid.

[0003] When implementing rate of change regulation, the AGC system in the related technology uses the value of the grid connection point at the same section time when the dispatch instruction is received as the initial active value, and then adds the 1-minute rate of change regulation amount (the maximum 1-minute regulation amount is 10% of the installed capacity) to generate a target value for distribution.

[0004] However, this method of taking the initial value may cause a situation where the optical resources fluctuate greatly. The part of the inverter power fluctuation that exceeds the target value is collected by the dispatching master station, or the amount of data in the telecontrol system is too large. At the same time, the real-time data of the grid connection point in the station is sent to the dispatching and AGC systems. There is a delay or packet loss in the system sending data to the dispatching and forwarding the grid connection point data to the AGC system, resulting in the active regulation amount within a one-minute time interval exceeding the theoretical change rate limit and being assessed.

[0005] Therefore, the current active power regulation method of a photovoltaic power station has the problem of inaccurate active power change rate due to inaccurate active power values obtained. Summary of the Invention

[0006] In view of this, the present invention provides a photovoltaic power station active power regulation method and computer equipment to solve the problem of inaccurate active power change rate caused by inaccurate active power value obtained.

[0007] In a first aspect, the present invention provides a method for regulating active power of a photovoltaic power station, which is applied to an AGC system of a target photovoltaic station; the method for regulating active power of a photovoltaic power station comprises: upon receiving an active power regulation instruction, obtaining an active power sequence of a grid-connected point before a preset time length; selecting a target power value in the active power sequence as an initial value for active power regulation based on the power regulation type of the active power regulation instruction; wherein, the target power value is an extreme value of the active power sequence or the change characteristics of the target power value relative to adjacent active powers conform to a preset change trend; and the initial value for active power regulation is superimposed on the active power regulation amount and then calculated and allocated to the target inverter.

[0008] As an exemplary embodiment, the power regulation type based on the active power regulation instruction selects a target power value in the active power sequence as the initial value of active power regulation, including: if the power regulation type of the active power regulation instruction is rising power regulation, the active power sequence is screened based on the first numerical characteristics and / or first change characteristics of each active power in the active power sequence to obtain a target power value as the initial value of active power regulation; wherein, the target power value is the minimum value of the active power sequence and / or the change characteristics of the target power value relative to the adjacent active power meet the preset change trend.

[0009] As an exemplary embodiment, the active power sequences are screened based on the first numerical characteristics of each active power in the active power sequence to obtain a target power value as the initial value for active power regulation, including: selecting the minimum power value in the active power sequence as the initial value for active power regulation.

[0010] As an exemplary embodiment, the active power sequence is screened based on the first numerical feature and the first change feature of each active power in the active power sequence to obtain a target power value as the initial value of the active power adjustment, including: traversing the active power sequence, calculating the power change rate of each active power in the active power sequence relative to the adjacent active power as the first change feature; eliminating the active power with a power change rate greater than a preset change rate to obtain a first corrected active power sequence; and selecting the minimum power value in the first corrected active power sequence as the initial value of the active power adjustment.

[0011] As an exemplary embodiment, the active power regulation method of the photovoltaic power station also includes: obtaining the line active power sequence of each collection line before a preset time length; selecting the line minimum power value in the active power sequence of the collection line; and correcting the active power regulation initial value based on the line minimum power value.

[0012] As an exemplary embodiment, selecting a target power value in the active power sequence as the initial value of active power regulation based on the power regulation type of the active power regulation instruction also includes: if the power regulation type of the active power regulation instruction is power reduction regulation, screening the active power sequence based on the second numerical characteristics and / or second change characteristics of each active power in the active power sequence to obtain a target power value as the initial value of active power regulation; wherein, the target power value is the maximum value of the active power sequence and / or the change characteristics of the target power value relative to the adjacent active power meet the preset change trend.

[0013] As an exemplary embodiment, the active power sequence is screened based on the second numerical characteristics of each active power in the active power sequence to obtain a target power value as the initial value of the active power adjustment, including: selecting the maximum power value in the active power sequence as the initial value of the active power adjustment.

[0014] As an exemplary embodiment, the screening of the active power sequence to obtain the target power value as the initial value of the active power adjustment includes: the screening of the active power sequence based on the second numerical feature and the second change feature of each active power in the active power sequence to obtain the target power value as the initial value of the active power adjustment, including: traversing the active power sequence, calculating the power change rate of each active power in the active power sequence relative to the adjacent active power as the second change feature; eliminating the active power with a power change rate greater than a preset change rate to obtain a second corrected active power sequence; and selecting the maximum power value in the second corrected active power sequence as the initial value of the active power adjustment.

[0015] As an exemplary embodiment, the photovoltaic power station active power regulation method also includes: obtaining a line active power sequence of a collector line electrically connected to the AGC system before a preset time length; selecting a line maximum power value in the line active power sequence; and correcting the active power regulation initial value based on the line maximum power value.

[0016] In a second aspect, the present invention provides a computer device comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the method of the first aspect or any corresponding embodiment thereof by executing the computer instructions.

[0017] The present invention discloses a photovoltaic power station active power regulation method and computer equipment. The photovoltaic power station active power regulation method is applied to the AGC system of a target photovoltaic field station; the photovoltaic power station active power regulation method comprises: when receiving an active power regulation instruction, obtaining the grid-connected point active power sequence before a preset time length; selecting a target power value in the grid-connected point active power sequence as the active power regulation initial value based on the power regulation type of the active power regulation instruction; wherein the target power value is the extreme value of the active power sequence or the change characteristic of the target power value relative to the adjacent active power meets the preset change trend; the active power regulation initial value is superimposed on the active power regulation amount and then calculated and allocated to the target inverter; the target power value can be reflected in the photovoltaic field station when the power light resource fluctuates greatly or when there is a delay in the communication system accurate power value; based on the power regulation type of the active power regulation instruction, the extreme value of the active power sequence or the target power value whose change characteristics relative to the adjacent active power are in line with the preset change trend is selected. The target power value can reflect the relatively accurate power value of the photovoltaic station when the power light resource fluctuates greatly or there is a delay in the communication system; further, when the active power regulation initial value is superimposed on the active power regulation amount and then allocated to the target inverter, it is allocated based on the accurate initial value of the photovoltaic station, which can solve the problem of inaccurate active power change rate caused by inaccurate active power value obtained in the active power regulation method in the related art, and avoid the problem of active regulation amount exceeding the theoretical change rate limit within a one-minute time interval and being assessed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 is a flow chart of a method for regulating active power of a photovoltaic power station according to an embodiment of the present invention;

[0020] Figure 2 Schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0022] According to an embodiment of the present invention, an embodiment of a method for regulating active power of a photovoltaic power station is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0023] In this embodiment, a method for regulating active power of a photovoltaic power station is provided, and the method for regulating active power of a photovoltaic power station is applied to an AGC system of a target photovoltaic station; Figure 1 FIG. 1 is a flow chart of a method for regulating active power of a photovoltaic power station according to an embodiment of the present invention. Figure 1 As shown, the process includes the following steps:

[0024] Step S101: upon receiving an active power adjustment instruction, obtaining a grid connection point active power sequence before a preset time period.

[0025] Step S102, based on the power regulation type of the active power regulation instruction, select a target power value in the active power sequence of the grid connection point as the initial value of the active power regulation; wherein, the target power value is the extreme value of the active power sequence or the change characteristics of the target power value relative to the adjacent active power are in line with the preset change trend.

[0026] Step S103: The active power adjustment initial value is superimposed on the active power adjustment amount and the resultant is distributed to the target inverter.

[0027] When implementing rate of change regulation, the AGC system in the related technology uses the value of the grid connection point at the same section time when the dispatch instruction is received as the initial active value, and then adds the 1-minute rate of change regulation amount (the maximum 1-minute regulation amount is 10% of the installed capacity) to generate a target value for distribution.

[0028] However, on the one hand, due to the volatility and randomness of optical resources, when the optical resources fluctuate greatly, the part of the inverter power fluctuation that exceeds the target value is collected by the scheduling master station side. At this time, the scheduling master station communicates the scheduling instruction to the AGC system; the initial active power value obtained at this time is the fluctuation value caused by the volatility and randomness of optical resources. If the method of taking the value of the grid connection point at the same section time as the dispatching instruction is received in the relevant technology as the initial active value, when the active power control is performed with the fluctuation value as the initial active value superimposed on the target value, it will cause the active adjustment amount to exceed the theoretical change rate limit and thus be assessed.

[0029] On the other hand, when the real-time power collected by the AGC system is uploaded, it is usually communicated with the telecontrol system through the AGC system, and the telecontrol system transmits it to the dispatching master station through the dispatching data network. The amount of data communicated and processed by the telecontrol system is too large, and occasionally the system will freeze and the total call data will be delayed. In addition, there is also the phenomenon that the actual power is forwarded from the AGC system to the telecontrol, and then uploaded to the dispatch by the telecontrol. The intermediate link may cause data packet loss due to abnormal problems such as the AGC system channel link. The above-mentioned communication problems cause the initial active power value obtained by the AGC system at the same section time as the dispatching instruction is received to be inaccurate. If the method of taking the value of the grid connection point at the same section time as the dispatching instruction is received in the related technology as the active initial value, when the active power control is performed with the fluctuation value as the active initial value superimposed on the target value, it will cause the active adjustment amount to exceed the theoretical change rate limit and be assessed.

[0030] To solve this problem, in this embodiment, when an active power regulation instruction is received, the active power sequence of the grid-connected point before the preset time length is obtained; for example, the preset time length can be 1 minute; after obtaining the active power sequence, the target power value is selected from the grid-connected point active power sequence based on the power regulation type of the active power regulation instruction as the active power regulation initial value; wherein, the target power value is the extreme value of the active power sequence or the change characteristics of the target power value relative to the adjacent active power meet the preset change trend; further, the active power regulation initial value is superimposed on the active power regulation amount and then calculated and allocated to the target inverter; relative to the method of taking the grid-connected point value at the same section time as the dispatch instruction is received as the active initial value, the active power regulation value is selected based on the active power The power regulation type of the rate regulation instruction selects the extreme value of the active power sequence or the target power value whose change characteristics relative to the adjacent active power are in line with the preset change trend. The target power value can reflect the relatively accurate power value of the photovoltaic station when the power light resources fluctuate greatly or when there is a delay in the communication system; further, when the active power regulation initial value is superimposed on the active power regulation amount and then allocated to the target inverter, it is allocated based on the accurate initial value of the photovoltaic station, which can solve the problem of inaccurate active power change rate caused by inaccurate active power value obtained in the active power regulation method in the related art, and avoid the problem of active power regulation amount exceeding the theoretical change rate limit within a one-minute time interval and being assessed.

[0031] As an exemplary embodiment, the power regulation type based on the active power regulation instruction selects a target power value in the active power sequence as the initial value of active power regulation, including: if the power regulation type of the active power regulation instruction is rising power regulation, the active power sequence is screened based on the first numerical characteristics and / or first change characteristics of each active power in the active power sequence to obtain a target power value as the initial value of active power regulation; wherein, the target power value is the minimum value of the active power sequence and / or the change characteristics of the target power value relative to the adjacent active power meet the preset change trend.

[0032] In this embodiment, if the power regulation type of the active power regulation instruction is rising power regulation, when the selected target power value is a larger fluctuation value for active power regulation, when the fluctuation value superimposed adjustment amount is sent to the inverter, the active adjustment amount within a one-minute time interval may exceed the theoretical change rate limit and be assessed; to solve this problem, in this embodiment, the active power sequence is screened based on the first numerical feature and / or the first change feature of each active power in the active power sequence, and the target power value is obtained as the initial value of the active power regulation.

[0033] Exemplarily, the first numerical feature is the numerical value, and the first change feature is the change feature of each active power relative to the adjacent active power; the active power sequence is screened based on the first numerical feature and / or the first change feature of each active power in the active power sequence, and when the target power value is obtained as the initial value of the active power adjustment, the target power value is the minimum value of the active power sequence, or the change feature of the target power value relative to the adjacent active power meets the preset change trend, so as to select the minimum power value in the active power sequence, select the target power value in the stable state whose change feature meets the preset change trend as the initial value of the active power, or select the minimum power value in the active power sequence whose change feature meets the preset change trend as the initial value of the active power adjustment, so as to avoid the problem of the active adjustment amount within a one-minute time interval exceeding the theoretical change rate limit and being assessed.

[0034] In one embodiment, the minimum power value in the active power sequence of the grid connection point before a preset time period is directly taken as the initial value of the active power regulation, and the active power regulation amount is superimposed with a smaller target value as the initial value of the active power regulation, so as to avoid the problem that the active regulation amount within a one-minute time interval exceeds the theoretical change rate limit and is assessed; based on this, as an exemplary embodiment, the active power sequence is screened based on the first numerical feature of each active power in the active power sequence to obtain the target power value as the initial value of the active power regulation, including: selecting the minimum power value in the active power sequence as the initial value of the active power regulation.

[0035] In one embodiment, the active power sequence is screened based on the first change characteristics of each active power in the active power sequence, and the active power with a stable change trend is obtained as the initial value of the active power regulation, so as to avoid the problem of the active power regulation amount exceeding the theoretical change rate limit within a one-minute time interval and being assessed by superimposing the active power regulation amount on the stable initial value of the active power regulation.

[0036] Exemplarily, when the active power sequence is filtered based on the first change feature, multiple groups of historical power data that match the timing of the active power sequence of the grid connection point can be obtained. Furthermore, the active power sequence is filtered by the degree of matching between the change trend of the active power in the active power sequence and the change trend of the historical active power of the historical power data, and at least one active power value with a matching degree greater than a preset degree is obtained as the initial value of the active power adjustment.

[0037] Specifically, the active power value can be determined by dividing the active power sequence and multiple historical active power sequences according to sliding windows, calculating the first change trend of the first sliding window corresponding to the active power sequence corresponding to the time series and the second change trend of the second sliding window corresponding to the historical active power sequence, and further calculating the similarity between the first change trend and the second change trend; based on this, as an exemplary embodiment, the active power sequence is screened based on the first change feature of each active power in the active power sequence to obtain a target power value as the initial value of active power adjustment, including: obtaining multiple historical active power sequences that match the active power sequence at a moment; dividing the active power sequence and the historical active power sequence according to a preset sliding window length to obtain multiple first sub-power sequences corresponding to the active power sequence and multiple second sub-power sequences corresponding to each historical active power sequence; calculating the similarity between each first sub-power sequence corresponding to the time series and each second sub-power sequence; taking the first sub-power sequence with a similarity greater than a preset similarity as the target power sequence; and determining the initial value of active power adjustment based on at least one active power value in the target power sequence.

[0038] Exemplarily, after obtaining the target power sequence, the minimum power value in the target power sequence is selected as the initial value for active power regulation.

[0039] Exemplarily, after obtaining the target power sequence, the average power value of the target power sequence is calculated as the initial value for active power regulation.

[0040] In one embodiment, the active power sequence is screened based on the first numerical characteristics and the first change characteristics of each active power in the active power sequence, and the active power with a stable change trend and the smallest value is obtained as the initial value of the active power adjustment; based on this, as an exemplary embodiment, the active power sequence is screened based on the first numerical characteristics and the first change characteristics of each active power in the active power sequence to obtain the target power value as the initial value of the active power adjustment, including: traversing the active power sequence, calculating the power change rate of each active power in the active power sequence relative to the adjacent active power as the first change characteristic; eliminating the active power with a power change rate greater than a preset change rate to obtain a first corrected active power sequence; selecting the minimum power value in the first corrected active power sequence as the initial value of the active power adjustment.

[0041] In this embodiment, the power change rate of each active power relative to the adjacent active power is calculated as the first change feature, and further based on the first change feature, abnormal active power data with large fluctuations is eliminated, and a stable first corrected active power sequence is retained. Further, the minimum power value in the stable first corrected active power sequence is selected as the active power adjustment initial value, so that the active power adjustment amount is superimposed on the stable and small active power adjustment initial value and distributed to each inverter, thereby avoiding the problem of the active power adjustment amount exceeding the theoretical change rate limit within a one-minute time interval and being assessed.

[0042] Among them, illustratively, the preset change rate can be determined by the historical power data of the target photovoltaic station; specifically, the historical power data of multiple target photovoltaic stations corresponding to the active power sequence timing can be obtained, the change rate of multiple historical power data can be calculated and the average is taken as the preset change rate.

[0043] As an exemplary embodiment, the active power regulation method of the photovoltaic power station also includes: obtaining the line active power sequence of each collection line before a preset time length; selecting the line minimum power value in the active power sequence of the collection line; and correcting the active power regulation initial value based on the line minimum power value.

[0044] In this embodiment, the active power sequences of the collection lines before the preset time are used to calibrate the acquired active power sequences of the grid connection points.

[0045] As an exemplary embodiment, selecting a target power value in the active power sequence as the initial value of active power regulation based on the power regulation type of the active power regulation instruction also includes: if the power regulation type of the active power regulation instruction is power reduction regulation, screening the active power sequence based on the second numerical characteristics and / or second change characteristics of each active power in the active power sequence to obtain a target power value as the initial value of active power regulation; wherein, the target power value is the maximum value of the active power sequence and / or the change characteristics of the target power value relative to the adjacent active power meet the preset change trend.

[0046] In this embodiment, if the power regulation type of the active power regulation instruction is power reduction regulation, when the selected target power value is a fluctuation value for active power regulation, when the fluctuation value superimposed regulation amount is sent to the inverter, the active regulation amount within a one-minute time interval may exceed the theoretical change rate limit and be assessed; to solve this problem, in this embodiment, the active power sequence is screened based on the second numerical feature and / or the second change feature of each active power in the active power sequence, and the target power value is obtained as the initial value of the active power regulation; wherein the second numerical feature is the numerical value size, and the second change feature is the change feature of each active power relative to the adjacent active power; based on the active power sequence The second numerical characteristic and / or second change characteristic of each active power in the column is used to screen the active power sequence, and when the target power value is obtained as the initial value of the active power regulation, the target power value is the maximum value of the active power sequence, or the change characteristic of the target power value relative to the adjacent active power meets the preset change trend, so as to select the maximum power value in the active power sequence, select the target power value in the stable state whose change characteristic meets the preset change trend as the initial value of the active power, or select the maximum power value in the active power sequence whose change characteristic meets the preset change trend as the initial value of the active power regulation, so as to avoid the problem that the active regulation amount within a one-minute time interval exceeds the theoretical change rate limit and is assessed.

[0047] In one embodiment, the maximum power value in the active power sequence of the grid connection point before a preset time period is directly taken as the initial value of the active power regulation, so as to superimpose the active power regulation amount with a larger target value as the initial value of the active power regulation, so as to avoid the problem that the active regulation amount within a one-minute time interval exceeds the theoretical change rate limit and is assessed; based on this, as an exemplary embodiment, the active power sequence is screened based on the second numerical characteristics of each active power in the active power sequence to obtain the target power value as the initial value of the active power regulation, including: selecting the maximum power value in the active power sequence as the initial value of the active power regulation.

[0048] In one embodiment, the active power sequence is screened based on the second change characteristics of each active power in the active power sequence, and the active power with a stable change trend is obtained as the initial value of the active power regulation, so as to avoid the problem of the active power regulation amount exceeding the theoretical change rate limit within a one-minute time interval and being assessed by superimposing the active power regulation amount on the stable initial value of the active power regulation.

[0049] Exemplarily, when the active power sequence is filtered based on the second numerical feature, multiple groups of historical power data that match the time series of the active power sequence of the grid connection point can be obtained. Furthermore, the active power sequence is filtered by the degree of matching between the changing trend of the active power in the active power sequence and the changing trend of the historical active power of the historical power data, and at least one active power value with a matching degree greater than a preset degree is obtained as the initial value of the active power adjustment.

[0050] Specifically, the active power value can be determined by dividing the active power sequence and multiple historical active power sequences according to sliding windows, calculating the first change trend of the first sliding window corresponding to the active power sequence corresponding to the time series and the second change trend of the second sliding window corresponding to the historical active power sequence, and further calculating the similarity between the first change trend and the second change trend; based on this, as an exemplary embodiment, the active power sequence is screened based on the second change feature of each active power in the active power sequence to obtain a target power value as the initial value of active power adjustment, including: obtaining multiple historical active power sequences that match the active power sequence at a moment; dividing the active power sequence and the historical active power sequence according to a preset sliding window length to obtain multiple first sub-power sequences corresponding to the active power sequence and multiple second sub-power sequences corresponding to each historical active power sequence; calculating the similarity between each first sub-power sequence corresponding to the time series and each second sub-power sequence; taking the first sub-power sequence with a similarity greater than a preset similarity as the target power sequence; and determining the initial value of active power adjustment based on at least one active power value in the target power sequence.

[0051] Exemplarily, after obtaining the target power sequence, the maximum power value in the target power sequence is selected as the initial value for active power regulation.

[0052] Exemplarily, after obtaining the target power sequence, the average power value of the target power sequence is calculated as the initial value for active power regulation.

[0053] In one embodiment, the active power sequence is screened based on the second numerical characteristics and the second change characteristics of each active power in the active power sequence, and the active power with a stable change trend and the largest value is obtained as the initial value of the active power adjustment; based on this, as an exemplary embodiment, the active power sequence is screened based on the second numerical characteristics and the second change characteristics of each active power in the active power sequence, and the target power value is obtained as the initial value of the active power adjustment, including: traversing the active power sequence, calculating the power change rate of each active power in the active power sequence relative to the adjacent active power as the second change characteristic; eliminating the active power with a power change rate greater than a preset change rate to obtain a second corrected active power sequence; selecting the maximum power value in the second corrected active power sequence as the initial value of the active power adjustment.

[0054] In this embodiment, the power change rate of each active power relative to the adjacent active power is calculated to eliminate abnormal active power data with large fluctuations, retain a stable second corrected active power sequence, and further select the maximum power value in the stable second corrected active power sequence as the active power adjustment initial value, so as to distribute the active power adjustment amount to each inverter by superimposing the stable and large active power adjustment initial value, thereby avoiding the problem of the active power adjustment amount exceeding the theoretical change rate limit within a one-minute time interval and being assessed.

[0055] Among them, illustratively, the preset change rate can be determined by the historical power data of the target photovoltaic station; specifically, the historical power data of multiple target photovoltaic stations corresponding to the active power sequence timing can be obtained, the change rate of multiple historical power data can be calculated and the average is taken as the preset change rate.

[0056] As an exemplary embodiment, the active power regulation method of the photovoltaic power station also includes: obtaining the line active power sequence of each collection line before a preset time length; selecting the maximum line power value in the active power sequence of the collection line; and correcting the active power regulation initial value based on the maximum line power value.

[0057] In this embodiment, the active power sequence of each collector line before the preset time is used to calibrate the active power sequence on the grid connection point side.

[0058] An embodiment of the present invention also provides a computer device, including a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus, the memory is used to store computer programs; the processor is used to execute the method in any of the above embodiments by running the computer program stored in the memory.

[0059] Figure 2is a structural block diagram of an optional computer device according to an embodiment of the present application, such as Figure 2 As shown, it includes a processor 10, a communication interface 20, a memory 30 and a communication bus 40, wherein the processor 10, the communication interface 20 and the memory 30 communicate with each other through the communication bus 40, wherein,

[0060] Memory 30, for storing computer programs;

[0061] The processor 10 is configured to implement the method of any of the above embodiments when executing the computer program stored in the memory 30 .

[0062] Optionally, in this embodiment, the communication bus may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus. The communication bus may be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, Figure 2 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0063] The communication interface is used for communication between the above-mentioned computer device and other devices.

[0064] The memory may include RAM, or may include non-volatile memory, such as at least one disk memory. Alternatively, the memory may also be at least one storage device located away from the aforementioned processor.

[0065] The above-mentioned processor can be a general-purpose processor, which can include but is not limited to: CPU (Central Processing Unit), NP (Network Processor), etc.; it can also be DSP (Digital Signal Processing), ASIC (Application Specific Integrated Circuit), FPGA (Field-Programmable Gate Array) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0066] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0067] It can be understood by those skilled in the art that Figure 2 The structure shown is for illustration only. The device for implementing any one of the methods in the above embodiments may be a terminal device, which may be a smart phone (such as an Android phone, an IOS phone, etc.), a tablet computer, a PDA, a mobile Internet device (MID), a PAD, or other terminal devices. Figure 2 It does not limit the structure of the above electronic device. For example, the terminal device may also include Figure 2 More or fewer components (such as network interfaces, display devices, etc.) shown in, or with Figure 2 Different configurations shown.

[0068] A person skilled in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing the hardware related to the terminal device through a program, and the program can be stored in a computer-readable storage medium, which can include: a flash drive, ROM, RAM, a magnetic disk or an optical disk, etc.

[0069] The serial numbers of the above embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0070] If the integrated units in the above embodiments are implemented in the form of software functional units and sold or used as independent products, they can be stored in the above-mentioned computer-readable storage medium. Based on this understanding, the technical solution of this application, or the part that contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes a number of instructions for causing one or more computer devices (such as personal computers, servers, or network devices) to execute all or part of the steps of the method in the above embodiments.

[0071] In the several embodiments provided in this application, it should be understood that the disclosed client can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is merely a logical functional division. In actual implementation, there may be other division methods, such as combining or integrating multiple units or components into another system, or ignoring or not implementing some features. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interface, indirect coupling or communication connection of units or modules, and may be electrical or other forms.

[0072] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected based on actual needs to achieve the purpose of the solution provided in this embodiment.

[0073] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0074] In the above embodiments of the present application, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0075] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for regulating active power of a photovoltaic power station, characterized in that: The photovoltaic power station active power regulation method is applied to the AGC system of the target photovoltaic station; The photovoltaic power station active power regulation method includes: Upon receiving an active power adjustment instruction, obtaining the active power sequence of the grid connection point before a preset time period; Selecting a target power value in the active power sequence as an initial value for active power regulation based on the power regulation type of the active power regulation instruction; wherein the target power value is an extreme value of the active power sequence or a change characteristic of the target power value relative to adjacent active powers conforms to a preset change trend; The active power adjustment initial value is superimposed on the active power adjustment amount and then calculated and distributed to the target inverter.

2. The method for regulating active power of a photovoltaic power station according to claim 1, wherein: The power regulation type based on the active power regulation instruction selects a target power value in the active power sequence as an initial value for active power regulation, including: If the power regulation type of the active power regulation instruction is rising power regulation, the active power sequence is screened based on the first numerical characteristics and / or first change characteristics of each active power in the active power sequence to obtain a target power value as the initial value of the active power regulation; wherein, the target power value is the minimum value of the active power sequence and / or the change characteristics of the target power value relative to the adjacent active power conform to the preset change trend.

3. The method for regulating active power of a photovoltaic power station according to claim 2, wherein: The screening of each active power sequence based on the first numerical feature of each active power in the active power sequence to obtain a target power value as the initial active power adjustment value includes: The minimum power value in the active power sequence is selected as the active power adjustment initial value.

4. The method for regulating active power of a photovoltaic power station according to claim 2, wherein: The screening of the active power sequence based on the first numerical feature and the first variation feature of each active power in the active power sequence to obtain a target power value as the active power adjustment initial value includes: Traversing the active power sequence, calculating a power change rate of each active power in the active power sequence relative to an adjacent active power as a first change feature; Eliminating active power with a power change rate greater than a preset change rate to obtain a first corrected active power sequence; The minimum power value in the first corrected active power sequence is selected as the initial active power adjustment value.

5. The method for regulating active power of a photovoltaic power station according to claim 2, wherein: The photovoltaic power station active power regulation method further includes: Obtaining the active power sequence of each collector line before a preset time period; Selecting the minimum power value of the line in the active power sequence of the collector line; The active power adjustment initial value is corrected based on the line minimum power value.

6. The method for regulating active power of a photovoltaic power station according to claim 1, wherein: The method further includes selecting a target power value in the active power sequence as an initial active power adjustment value based on the power adjustment type of the active power adjustment instruction: If the power regulation type of the active power regulation instruction is power reduction regulation, the active power sequence is screened based on the second numerical characteristics and / or second change characteristics of each active power in the active power sequence to obtain a target power value as the initial value of the active power regulation; wherein, the target power value is the maximum value of the active power sequence and / or the change characteristics of the target power value relative to the adjacent active power conform to the preset change trend.

7. The method for regulating active power of a photovoltaic power station according to claim 6, characterized in that: The screening of the active power sequence based on the second numerical feature of each active power in the active power sequence to obtain a target power value as the active power adjustment initial value includes: The maximum power value in the active power sequence is selected as the active power adjustment initial value.

8. The method for regulating active power of a photovoltaic power station according to claim 6, wherein: The screening of the active power sequence based on the second numerical feature and the second variation feature of each active power in the active power sequence to obtain a target power value as the active power adjustment initial value includes: Traversing the active power sequence, calculating a power change rate of each active power in the active power sequence relative to an adjacent active power as a second change feature; Eliminating active power with a power change rate greater than a preset change rate to obtain a second corrected active power sequence; The maximum power value in the second corrected active power sequence is selected as the initial active power adjustment value.

9. The method for regulating active power of a photovoltaic power station according to claim 6, wherein: The photovoltaic power station active power regulation method further includes: Acquire a line active power sequence of a collector line electrically connected to the AGC system before a preset time period; Selecting the maximum power value of the line in the line active power sequence; The active power adjustment initial value is corrected based on the maximum power value of the line.

10. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the active power regulation method of a photovoltaic power station according to any one of claims 1 to 9 by executing the computer instructions.

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