Photovoltaic power generation system generating capacity calculation method and related device

Abstract

The invention belongs to the technical field of new energy photovoltaic power generation capacity metering, and discloses a photovoltaic power generation system power generation capacity calculation method and a related device, and the method comprises the steps: obtaining original power data at a preset second-level time interval; performing validity check on the obtained original power data to obtain effective power data; based on the effective power data, classifying the operation state of the photovoltaic power generation system to obtain an operation state classification result of the photovoltaic power generation system; based on the operation state classification result of the photovoltaic power generation system and in combination with dynamic integral weights in different operation states, performing integral calculation on the effective power data to obtain a generating capacity calculation result of the photovoltaic power generation system; according to the method, power generation conditions in different operation states are fully considered, and the accuracy of calculating the generating capacity of the photovoltaic power generation system is comprehensively improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy photovoltaic power generation measurement, and in particular relates to a method for calculating power generation of a photovoltaic power generation system and related devices. Background Art

[0002] At present, in the process of integrating electricity of new energy photovoltaic power generation, 15 minutes or 1 hour is usually used as the minimum electricity integration period for calculation. However, in practice, the traditional integrated electricity calculation method has insufficient time resolution and lacks state perception, resulting in large errors and low reliability in the calculation results of integrated electricity. Specifically: (1) When the irradiance drops in a short period of time, the output power drops sharply; the 15-minute or 1-hour integration period will cause the power generation to be evenly distributed, underestimate the actual power generation loss, and cannot accurately reflect the instantaneous situation. (2) When operating with limited power, the theoretical power generation capacity is not fully considered, resulting in calculation errors. (3) In abnormal conditions such as communication interruption or equipment failure, the calculation process is prone to include abnormal data, resulting in result errors. Summary of the Invention

[0003] In response to the technical problems existing in the prior art, the present invention provides a method and related device for calculating the power generation of a photovoltaic power generation system to solve the technical problems of insufficient time resolution and lack of state perception in the traditional integral power calculation method, which leads to large errors and low reliability in the calculation results of the integral power.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is: The present invention provides a method for calculating the power generation of a photovoltaic power generation system, comprising: Obtain raw power data at preset time intervals of seconds; Perform validity check on the acquired raw power data to obtain effective power data; Based on the effective power data, the operating status of the photovoltaic power generation system is classified to obtain the operating status classification result of the photovoltaic power generation system; Based on the classification results of the operating status of the photovoltaic power generation system and combined with the dynamic integral weights under different operating states, the effective power data is integrated and calculated to obtain the power generation calculation results of the photovoltaic power generation system.

[0005] Furthermore, the preset second-level time interval is 5 seconds.

[0006] Furthermore, the process of performing validity check on the acquired raw power data and obtaining effective power data includes: The original power data is subjected to amplitude inspection and mutation detection processing to obtain effective power data.

[0007] Furthermore, the amplitude of the original power data is checked and processed to obtain the effective power data, as follows:

[0008] in, is the instantaneous value of power in the effective power data; is the rated power of the photovoltaic power generation system; is the amplitude coefficient; is the instantaneous power value in the original power data.

[0009] Furthermore, the process of performing mutation detection processing on the original power data to obtain effective power data includes: According to the preset mutation detection rules, the jump data in the original power data is identified, and the identified jump data is processed to obtain the effective power data; Among them, the preset mutation detection rules are as follows:

[0010]

[0011] in, The current time unit Raw power data within; For the previous time unit Raw power data within; The preset time interval is in seconds; is the power change threshold; is the rated power of the photovoltaic power generation system; For seconds.

[0012] Furthermore, the operating state classification results of the photovoltaic power generation system include normal power generation state, power-limited operation state, start-stop process state and fault state.

[0013] Furthermore, based on the classification results of the operating status of the photovoltaic power generation system and combined with the dynamic integral weights under different operating states, the effective power data is integrated and calculated to obtain the power generation calculation results of the photovoltaic power generation system, as follows:

[0014]

[0015] in, The current time unit The increase in power generation within The current time unit Effective power data within; The classification results of the operating status of the photovoltaic power generation system are Dynamic integral weight when ; The calculation result of power generation of photovoltaic power generation system; is the total number of time units.

[0016] The present invention also provides a photovoltaic power generation system power generation calculation system, comprising: A raw data acquisition module is used to acquire raw power data at preset time intervals of seconds; A data validity check module is used to check the validity of the acquired original power data to obtain effective power data; An operating status classification module is used to classify the operating status of the photovoltaic power generation system based on the effective power data and obtain the operating status classification result of the photovoltaic power generation system; The integral calculation module is used to perform integral calculation on the effective power data based on the classification results of the operating status of the photovoltaic power generation system and combined with the dynamic integral weights under different operating states to obtain the power generation calculation results of the photovoltaic power generation system.

[0017] The present invention also provides an electronic device, comprising: a processor suitable for executing a computer program; A computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, the method for calculating the power generation of the photovoltaic power generation system is executed.

[0018] The present invention also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for calculating the power generation of a photovoltaic power generation system is implemented.

[0019] Compared with the prior art, the present invention has the following beneficial effects: The method for calculating the power generation of a photovoltaic power generation system provided by the present invention obtains raw power data from a real-time database at preset time intervals of seconds, taking into account the influence of instantaneous power changes; performs validity checks on the raw power data to ensure data quality and avoid interference from abnormal data; classifies the operating status based on the effective power data, and performs integral calculations based on dynamic integral weights under different operating statuses, taking into account the power generation conditions under different operating statuses, and is more in line with the actual power generation capacity. At the same time, through status classification and dynamic weight application, the data processing capability under abnormal conditions is improved, and the accuracy of the power generation calculation of the photovoltaic power generation system is comprehensively improved.

[0020] The photovoltaic power generation system power generation calculation system, electronic equipment and computer-readable storage medium provided by the present invention have all the advantages of the photovoltaic power generation system power generation calculation method described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 Flowchart of the method for calculating the power generation of the photovoltaic power generation system provided in Example 1; Figure 2 A structural block diagram of the photovoltaic power generation system power generation calculation system provided in Example 2; Figure 3 This is a structural block diagram of the electronic device provided in Example 3. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions, and beneficial effects solved by this application more clearly understood, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application; it is obvious that the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of this application.

[0024] The present invention provides a method for calculating the power generation of a photovoltaic power generation system, comprising the following steps: Step 100: Obtain raw power data from a real-time database of the photovoltaic power generation system at preset time intervals of seconds.

[0025] Step 200: Perform validity check on the acquired original power data to obtain effective power data.

[0026] Step 300: Classify the operating status of the photovoltaic power generation system based on the effective power data to obtain a classification result of the operating status of the photovoltaic power generation system.

[0027] Step 400 : Based on the classification result of the operation state of the photovoltaic power generation system and in combination with the dynamic integral weights under different operation states, the effective power data is integrated and calculated to obtain the power generation calculation result of the photovoltaic power generation system.

[0028] The method for calculating the power generation of a photovoltaic power generation system described in the present invention obtains raw power data from a real-time database at preset time intervals of seconds, which greatly improves the time resolution and can accurately capture the instantaneous change characteristics of the photovoltaic power generation system, avoiding the underestimated power generation loss due to equalization; the validity of the raw data is checked to obtain valid data and the operating status is classified, and the integral calculation is performed in combination with the dynamic integral weights under different states, which takes into account both the actual power and the theoretical power generation capacity, and can accurately reflect the actual power generation situation under working conditions such as power grid power limitation, and effectively identifies and processes abnormal data without the need for a large amount of manual correction in the later stage, thereby comprehensively improving the accuracy of the integral power calculation and providing more reliable data support for the performance evaluation of photovoltaic power generation systems, power system scheduling and planning, etc.

[0029] The following further explains the method for calculating the power generation of a photovoltaic power generation system provided by the present invention with reference to some specific embodiments: Example 1 As attached Figure 1 As shown, this embodiment 1 provides a method for calculating the power generation of a photovoltaic power generation system, comprising the following steps: Step 1: Obtain raw power data at preset second-level time intervals. Preferably, the preset second-level time interval is 5 seconds. Specifically, a query statement is constructed based on the table structure storing power data in a real-time database; the query statement includes the fields to be queried and the time range to be queried; the fields to be queried are, for example, power data fields. The constructed query statement is sent to the real-time database, and the database executes the query operation and returns the raw power data that meets the conditions, thereby obtaining the raw power data.

[0030] Step 2: Check the validity of the acquired raw power data to obtain effective power data. Specifically, the process of checking the validity of the acquired raw power data includes: performing amplitude check and mutation detection processing on the raw power data to obtain effective power data.

[0031] The process of performing amplitude check on the original power data to obtain effective power data is as follows:

[0032] in, is the instantaneous value of power in the effective power data; is the rated power of the photovoltaic power generation system; is the amplitude coefficient, Take 1.2; is the instantaneous power value in the original power data.

[0033] It should be noted that by performing amplitude check processing on the original power data, non-physical data caused by sensor failure, communication interference, etc. can be eliminated to ensure that the power integral calculation is based on a reasonable power range; among them, if the instantaneous power value in the original power data is less than zero, the instantaneous power value is set to zero; if the instantaneous power value in the original power data is greater than the rated power, its value is limited to no more than 20% of the rated power to avoid data anomalies caused by sensor failure or communication interference; if the instantaneous power value in the original power data is greater than zero but less than or equal to the rated power, When the power is multiplied by , the instantaneous power value in the original power data is used as the instantaneous power value of the effective power data.

[0034] The process of performing mutation detection on the original power data to obtain effective power data includes: According to the preset mutation detection rules, the jump data in the original power data is identified, and the identified jump data is processed to obtain the effective power data; wherein the preset mutation detection rules are as follows:

[0035]

[0036] in, The current time unit Raw power data within; For the previous time unit Raw power data within; The preset time interval is in seconds; is the power change threshold; is the rated power of the photovoltaic power generation system; For seconds.

[0037] It should be noted that the inequality If it is established, it indicates that the change between the original power data in two adjacent time units is normal and there is no jump data; otherwise, the change between the original power data in two adjacent time units is abnormal, that is, there is jump data.

[0038] In this embodiment 1, when processing the identified jump data, the process is as follows: determine whether the number of consecutive jump data exceeds the preset data number threshold; if not, discard the identified jump data and use linear difference to complete it; if exceeded, the original power data is identified as fault data, discarded and returned to step 1; preferably, the preset data number threshold is 11.

[0039] Step 3: Based on the effective power data, the operating status of the photovoltaic power generation system is classified to obtain the operating status classification results of the photovoltaic power generation system. The operating status classification results of the photovoltaic power generation system include normal power generation state, power limit operation state, start-stop process state, and fault state.

[0040] The process of classifying the operating status of a photovoltaic power generation system is as follows: monitoring the effective power data and determining the status based on preset judgment conditions; wherein the preset judgment conditions are as follows: (1) If the effective power data remains within ±10% of the theoretical value for at least 1 minute, the photovoltaic power generation system is in a normal power generation state. (2) If the effective power data is continuously lower than 90% of the theoretical value, the photovoltaic power generation system is in a power-limited state. (3) If the rate of change of the effective power data is greater than , the operating state of the photovoltaic power generation system is the start-stop process state. (4) When there is a communication interruption or equipment alarm, the operating state of the photovoltaic power generation system is the fault state.

[0041] Step 4: Based on the classification results of the operating status of the photovoltaic power generation system and combined with the dynamic integral weights under different operating states, the effective power data is integrated to obtain the power generation calculation results of the photovoltaic power generation system. The calculation process of the power generation calculation results of the photovoltaic power generation system is as follows:

[0042]

[0043] in, The current time unit The increase in power generation within The current time unit Effective power data within; The classification results of the operating status of the photovoltaic power generation system are Dynamic integral weight when ; The calculation result of power generation of photovoltaic power generation system; It is the total number of time units, and the accumulated electricity can be accumulated by hours or minutes according to business needs.

[0044] It should be noted that the operating status classification results of the photovoltaic power generation system are as follows: the dynamic integral weight in the normal power generation state is 1.0, the dynamic integral weight in the power-limited operation state is 0.8, the dynamic integral weight in the start-stop process state is 0.5, and the dynamic integral weight in the fault state is 0.

[0045] The method for calculating the power generation of a photovoltaic power generation system described in Example 1 uses a preset second-level time interval to obtain raw power data from a real-time database, which can more accurately capture the instantaneous changes in the power of the photovoltaic power generation system; secondly, after obtaining the raw power data, the data is checked for validity, and abnormal data can be identified and eliminated in real time, avoiding the entry of abnormal data into subsequent calculation processes; at the same time, since the processing of abnormal data is completed in the data acquisition and preprocessing stages, no manual correction is required at a later stage, which improves the calculation efficiency and reduces the calculation deviation; in addition, the dynamic integral weight under different operating states is combined for integral calculation; for example, according to the degree and duration of power limiting, the integral weight is reasonably adjusted to make the calculation result closer to the actual working condition.

[0046] Example 2 As attached Figure 2 As shown, this embodiment 2 provides a photovoltaic power generation system power generation calculation system, including a raw data acquisition module, a data validity check module, an operation status classification module and an integral calculation module.

[0047] The raw data acquisition module is used to obtain raw power data at preset time intervals of seconds; the data validity check module is used to perform validity checks on the acquired raw power data to obtain effective power data; the operating status classification module is used to classify the operating status of the photovoltaic power generation system based on the effective power data to obtain the operating status classification results of the photovoltaic power generation system; the integral calculation module is used to perform integral calculation on the effective power data based on the operating status classification results of the photovoltaic power generation system and combined with the dynamic integral weights under different operating states to obtain the power generation calculation results of the photovoltaic power generation system.

[0048] Example 3 As attached Figure 3 As shown, this embodiment 3 provides an electronic device, including: a memory for storing a computer program; a processor for implementing the steps of a method for calculating the power generation of a photovoltaic power generation system when executing the computer program, for example: obtaining raw power data at preset time intervals of seconds; performing a validity check on the obtained raw power data to obtain effective power data; classifying the operating status of the photovoltaic power generation system based on the effective power data to obtain a classification result of the operating status of the photovoltaic power generation system; based on the classification result of the operating status of the photovoltaic power generation system, and in combination with the dynamic integral weights under different operating states, performing integral calculation on the effective power data to obtain a calculation result of the power generation of the photovoltaic power generation system.

[0049] Alternatively, when the processor executes the computer program, it implements the functions of each module in the above-mentioned photovoltaic power generation system power generation calculation system, for example: a raw data acquisition module, used to obtain raw power data at preset time intervals of seconds; a data validity check module, used to perform validity check on the acquired raw power data to obtain effective power data; an operating status classification module, used to classify the operating status of the photovoltaic power generation system based on the effective power data, and obtain the operating status classification result of the photovoltaic power generation system; an integral calculation module, used to perform integral calculation on the effective power data based on the operating status classification result of the photovoltaic power generation system and combined with the dynamic integral weights under different operating states to obtain the power generation calculation result of the photovoltaic power generation system.

[0050] Exemplarily, the computer program may be divided into one or more modules / units, which are stored in the memory and executed by the processor to implement the present invention. The one or more modules / units may be a series of computer program instruction segments capable of implementing preset functions, and the instruction segments are used to describe the execution process of the computer program in the electronic device.

[0051] The electronic device may be a computing device such as a desktop computer, laptop, PDA, or cloud server. The electronic device may include, but is not limited to, a processor and memory. Those skilled in the art will appreciate that the above are examples of electronic devices and do not constitute a limitation on electronic devices. The electronic device may include more components than those described above, or a combination of certain components, or different components. For example, the electronic device may also include a communication interface, input / output devices, network access devices, a bus, etc.

[0052] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor. The processor is the control center of the electronic device and connects various parts of the entire electronic device using various interfaces and lines.

[0053] The memory may be used to store the computer programs and / or modules, and the processor implements various functions of the electronic device by running or executing the computer programs and / or modules stored in the memory and calling the data stored in the memory.

[0054] The memory may primarily include a program storage area and a data storage area. The program storage area may store an operating system and at least one application required for a function (such as sound playback or image playback); the data storage area may store data generated based on the use of the mobile phone (such as audio data and a phone book). Furthermore, the memory may include high-speed random access memory (RAM) and non-volatile memory, such as a hard disk, internal memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, at least one disk storage device, a flash memory device, or other volatile solid-state storage device.

[0055] Example 4 This embodiment 4 also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the steps of the method for calculating the power generation of a photovoltaic power generation system are implemented.

[0056] If the modules / units integrated in the photovoltaic power generation system energy generation calculation system are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.

[0057] Based on this understanding, the present invention implements all or part of the process of the above-mentioned method for calculating the power generation of a photovoltaic power generation system, and can also be completed by using a computer program to instruct related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, the computer program can implement the steps of the above-mentioned method for calculating the power generation of a photovoltaic power generation system. The computer program includes computer program code, which can be in source code form, object code form, executable file, or preset intermediate form.

[0058] The computer-readable storage medium may include: any entity or device that can carry the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium, etc.

[0059] The photovoltaic power generation system power generation calculation method provided by the present invention effectively solves the problems existing in the traditional integral power calculation method by improving time resolution, considering the theoretical power generation capacity under different operating conditions and abnormal data processing, and improves the accuracy and reliability of power generation calculation.

[0060] The above embodiment is only one of the implementation methods that can realize the technical solution of the present invention. The scope of protection claimed by the present invention is not limited only to this embodiment, but also includes changes, replacements and other implementation methods that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention.

Claims

1. A method for calculating the power generation of a photovoltaic power generation system, characterized in that: include: Obtain raw power data at preset time intervals of seconds; Perform validity check on the acquired raw power data to obtain effective power data; Based on the effective power data, the operating status of the photovoltaic power generation system is classified to obtain the operating status classification result of the photovoltaic power generation system; Based on the classification results of the operating status of the photovoltaic power generation system and combined with the dynamic integral weights under different operating states, the effective power data is integrated and calculated to obtain the power generation calculation results of the photovoltaic power generation system.

2. A method for calculating power generation of a photovoltaic power generation system according to claim 1, characterized in that: The default time interval is 5 seconds.

3. The method for calculating power generation of a photovoltaic power generation system according to claim 1, characterized in that: The process of checking the validity of the acquired raw power data to obtain valid power data includes: The original power data is subjected to amplitude inspection and mutation detection processing to obtain effective power data.

4. A method for calculating power generation of a photovoltaic power generation system according to claim 3, characterized in that: The process of performing amplitude check on the original power data to obtain effective power data is as follows: in, is the instantaneous value of power in the effective power data; is the rated power of the photovoltaic power generation system; is the amplitude coefficient; is the instantaneous power value in the original power data.

5. The method for calculating power generation of a photovoltaic power generation system according to claim 3, characterized in that: The process of performing mutation detection on the original power data to obtain effective power data includes: According to the preset mutation detection rules, the jump data in the original power data is identified, and the identified jump data is processed to obtain the effective power data; Among them, the preset mutation detection rules are as follows: in, The current time unit Raw power data within; For the previous time unit Raw power data within; The preset time interval is in seconds; is the power change threshold; is the rated power of the photovoltaic power generation system; For seconds.

6. The method for calculating power generation of a photovoltaic power generation system according to claim 1, characterized in that: The operating status classification results of the photovoltaic power generation system include normal power generation state, power-limited operation state, start-stop process state and fault state.

7. The method for calculating power generation of a photovoltaic power generation system according to claim 1, characterized in that: Based on the classification results of the operating status of the photovoltaic power generation system and combined with the dynamic integral weights under different operating states, the effective power data is integrated and calculated to obtain the power generation calculation results of the photovoltaic power generation system. The process is as follows: in, The current time unit The increase in power generation within The current time unit Effective power data within; The classification results of the operating status of the photovoltaic power generation system are Dynamic integral weight when ; The calculation result of power generation of photovoltaic power generation system; is the total number of time units.

8. A photovoltaic power generation system power generation calculation system, characterized in that: include: A raw data acquisition module is used to acquire raw power data at preset time intervals of seconds; A data validity check module is used to check the validity of the acquired original power data to obtain effective power data; An operating status classification module is used to classify the operating status of the photovoltaic power generation system based on the effective power data and obtain the operating status classification result of the photovoltaic power generation system; The integral calculation module is used to perform integral calculation on the effective power data based on the classification results of the operating status of the photovoltaic power generation system and combined with the dynamic integral weights under different operating states to obtain the power generation calculation results of the photovoltaic power generation system.

9. An electronic device, characterized in that: include: a processor suitable for executing a computer program; A computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is executed by the processor, the method for calculating the power generation of a photovoltaic power generation system according to any one of claims 1 to 7 is executed.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method for calculating the power generation of a photovoltaic power generation system according to any one of claims 1 to 7 is implemented.

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