Method, system and equipment for evaluating health state of photovoltaic power station and medium

Abstract

The invention discloses a photovoltaic power station health state assessment method, system and device and a medium. The method comprises the steps of obtaining state information of a photovoltaic power station; according to the state information of the photovoltaic power station, calculating the average power generation efficiency # imgabs0 # total station inverter fault rate FP and the total alarm rate ATP of the whole station; and determining the health state of the photovoltaic power station according to the fault rate FP and the total alarm rate ATP of the inverter of the total station average power generation efficiency # imgabs1 #. The method, the system, the equipment and the medium can accurately evaluate the health state of the photovoltaic power station.

Description

Technical Field

[0001] The present invention belongs to the technical field of photovoltaic power generation, and relates to a method, system, equipment and medium for evaluating the health status of a photovoltaic power station. Background Art

[0002] With the rapid development of new energy power generation, the installed capacity of photovoltaic power stations has continued to increase, and higher requirements have been placed on the intelligence, safety and reliability of photovoltaic power stations. During the use of photovoltaic equipment, certain damage will occur, and its performance will also decline as the use time increases. This will affect the overall operation safety and efficiency of the photovoltaic power station. At the same time, conventional power station operation and maintenance only focuses on damaged equipment and components, which is no longer applicable to the current management objectives.

[0003] In the face of this situation, a new method for evaluating the health status of photovoltaic power plants is established by analyzing and screening all parameters in the SCADA system. Reasonable adjustments to operations and arrangements for maintenance based on the evaluation results are of great significance for improving the safety and reliability of photovoltaic power plant operations and reducing operation and maintenance costs. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a method, system, device and medium for evaluating the health status of a photovoltaic power station. The method, system, device and medium can accurately evaluate the health status of a photovoltaic power station.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme:

[0006] In one aspect, the present invention provides a method for evaluating the health status of a photovoltaic power station, comprising:

[0007] Obtain status information of photovoltaic power station;

[0008] Calculate the average power generation efficiency of the entire station based on the status information of the photovoltaic power station The failure rate FP and total alarm rate ATP of all inverters in the station;

[0009] According to the average power generation efficiency of the whole station The failure rate FP and total alarm rate ATP of all inverters in the station determine the health status of the PV power station.

[0010] The method for evaluating the health status of a photovoltaic power station according to the present invention is further improved in that:

[0011] Furthermore, the process of calculating the average power generation efficiency of the entire station based on the status information of the photovoltaic power station is as follows:

[0012] Calculate the total power generation efficiency of the entire station based on the power generation efficiency e of each inverter Calculate the average power generation efficiency of the entire station based on the total power generation efficiency E at the entire station level Where n is the total number of inverters in the station.

[0013] Furthermore, the process of calculating the failure rate of the inverters of the entire station according to the status information of the photovoltaic power station is as follows:

[0014] Calculate the failure rate of the inverters in the entire station based on the number of normal operating inverters R and the number of faulty inverters F in the power station. Where n is the total number of inverters in the station.

[0015] Furthermore, the process of calculating the total alarm rate according to the status information of the photovoltaic power station is as follows:

[0016] Calculate the alarm rate based on the alarm number AN, fault number FN and operation number RN and failure rate The total alarm rate

[0017] Furthermore, the process of determining the health status of the photovoltaic power station according to the average power generation efficiency of the entire station, the failure rate of the inverters of the entire station and the total alarm rate is as follows:

[0018] Calculating health status score Among them, α, β, and γ are weight coefficients. α is determined according to the weather and environmental climate of the photovoltaic power station, and β and γ are determined according to the performance parameters and service life of the photovoltaic modules. α+β+γ=1;

[0019] The health status of the photovoltaic power station is evaluated according to the health status score HL.

[0020] In a second aspect of the present invention, the present invention provides a photovoltaic power station health status assessment system, comprising:

[0021] An acquisition module is used to obtain status information of a photovoltaic power station;

[0022] The calculation module is used to calculate the average power generation efficiency of the entire station based on the status information of the photovoltaic power station. The failure rate FP and total alarm rate ATP of all inverters in the station;

[0023] Evaluation module, used to calculate the average power generation efficiency of the whole station The failure rate FP and total alarm rate ATP of all inverters in the station determine the health status of the PV power station.

[0024] The photovoltaic power station health status assessment system of the present invention is further improved in that:

[0025] Furthermore, the process of calculating the average power generation efficiency of the entire station based on the status information of the photovoltaic power station is as follows:

[0026] Calculate the total power generation efficiency of the entire station based on the power generation efficiency e of each inverter Calculate the average power generation efficiency of the entire station based on the total power generation efficiency E at the entire station level Where n is the total number of inverters in the station.

[0027] Furthermore, the process of calculating the failure rate of the inverters of the entire station according to the status information of the photovoltaic power station is as follows:

[0028] Calculate the failure rate of the inverters in the entire station based on the number of normal operating inverters R and the number of faulty inverters F in the power station. Where n is the total number of inverters in the station.

[0029] In a third aspect of the present invention, the present invention provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method for evaluating the health status of a photovoltaic power station when executing the computer program.

[0030] In a fourth aspect of the present invention, the present invention 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 steps of the method for evaluating the health status of a photovoltaic power station are implemented.

[0031] The present invention has the following beneficial effects:

[0032] The photovoltaic power station health status assessment method, system, device and medium of the present invention calculate the average power generation efficiency of the entire station according to the status information of the photovoltaic power station during specific operation. The failure rate FP and total alarm rate ATP of the whole station inverter, and the average power generation efficiency of the whole station The failure rate FP and total alarm rate ATP of the whole station inverter are used as indicators to evaluate the health status of the photovoltaic power station. The operation is simple and the accuracy is high. It is of great significance to improve the safety and reliability of photovoltaic power station operation and reduce the operation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0034] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms “include” and “comprises” indicate the presence of described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0037] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0038] It should be further understood that the term "and / or" used in the present specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects are in an "or" relationship.

[0039] It should be understood that, although the terms first, second, third, etc. may be used to describe preset ranges, etc. in the embodiments of the present invention, these preset ranges should not be limited to these terms. These terms are only used to distinguish preset ranges from each other. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0040] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can usually be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0042] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0043] Embodiment 1

[0044] refer to Figure 1 The method for evaluating the health status level of a photovoltaic power station according to the present invention comprises the following steps:

[0045] 1) Collect power generation efficiency data, operating status, and alarm information of measurement points in photovoltaic power stations;

[0046] 2) Calculate the comprehensive power generation efficiency;

[0047] The process of step 2) is:

[0048] 21) Calculate the total power generation efficiency of the entire station based on the power generation efficiency e of each inverter Calculate the average power generation efficiency of the entire station based on the total power generation efficiency E at the entire station level Where n is the total number of inverters in the station.

[0049] 22) When the average power generation efficiency of the entire station When the power generation equipment utilization rate is low, it is necessary to retrieve the specific power generation efficiency of each power generation equipment, find the abnormal power generation equipment, and analyze the cause of the abnormality.

[0050] 3) Calculate the inverter operating status;

[0051] The process of step 3) is:

[0052] The inverter operation status is divided into normal status and fault status;

[0053] According to the number of normal operating inverters R and the number of fault inverters F in the power station, calculate the normal operating rate of the inverters in the whole station and failure rate Where n is the total number of inverters in the entire station, 0≤RP≤1, 0≤FP≤1.

[0054] When 0.6≤FP, it means that a large number of inverter failures have occurred, and it is necessary to check the relevant components to ensure the normal operation of the equipment. If necessary, shut down the equipment and conduct on-site inspection in the photovoltaic area.

[0055] 4) Calculate the alarm rate;

[0056] The process of step 4) is:

[0057] The alarms are divided into two categories: warnings and faults.

[0058] Calculate the alarm rate based on the alarm number AN, fault number FN and operation number RN and failure rate The total alarm rate Among them, 0≤ANP≤1, 0≤FNP≤1, 0≤ATP≤1.

[0059] When the alarm rate is 0.6≤ANP, it means that there are many abnormal values ​​in the telemetry points and telesignaling points, and timely attention is needed to analyze the specific abnormal points.

[0060] When the failure rate is 0.6≤FNP, it means that the equipment failure rate is high and it is necessary to check the relevant components to ensure the normal operation of the equipment and shut down for inspection if necessary.

[0061] 5) Determine the health status level of the photovoltaic power station;

[0062] The process of step 5) is:

[0063] Calculating health status score

[0064] When 0.75≤HL≤1, the health level is I, running well, and continuing to run.

[0065] When 0.6≤HL<0.75, the health level is II, which deviates from normal and requires enhanced monitoring.

[0066] When 0.4≤HL<0.6, the health level is III, a serious level, and be prepared for shutdown.

[0067] When 0.0≤HL<0.4, the health level is IV, the fault level, and the machine must be shut down immediately for on-site inspection.

[0068] Among them, α, β, and γ are weight coefficients. α is determined according to the weather and environmental climate of the photovoltaic power station, β and γ are determined according to the performance parameters and service life of the photovoltaic modules, and α+β+γ=1.

[0069] The present invention has the following characteristics:

[0070] The present invention can comprehensively and accurately evaluate the health status of a photovoltaic power station and provide a scientific decision-making basis for operation and maintenance personnel.

[0071] Through real-time monitoring and evaluation, the present invention can timely discover and handle potential problems, reduce operation and maintenance costs, and improve the economic benefits of photovoltaic power stations.

[0072] The invention is simple and easy to understand and has broad application prospects.

[0073] Embodiment 2

[0074] This embodiment discloses a photovoltaic power station health status assessment system, including:

[0075] An acquisition module is used to obtain status information of a photovoltaic power station;

[0076] The calculation module is used to calculate the average power generation efficiency of the entire station based on the status information of the photovoltaic power station. The failure rate FP and total alarm rate ATP of all inverters in the station;

[0077] Evaluation module, used to calculate the average power generation efficiency of the whole station The failure rate FP and total alarm rate ATP of all inverters in the station determine the health status of the PV power station.

[0078] As an implementation mode of the present invention, the process of calculating the average power generation efficiency of the entire photovoltaic power station according to the status information of the photovoltaic power station is as follows:

[0079] Calculate the total power generation efficiency of the entire station based on the power generation efficiency e of each inverter Calculate the average power generation efficiency of the entire station based on the total power generation efficiency E at the entire station level Where n is the total number of inverters in the station.

[0080] As an implementation mode of the present invention, the process of calculating the failure rate of inverters of the entire station according to the status information of the photovoltaic power station is as follows:

[0081] Calculate the failure rate of the inverters in the entire station based on the number of normal operating inverters R and the number of faulty inverters F in the power station. Where n is the total number of inverters in the station.

[0082] As an implementation mode of the present invention, the process of calculating the total alarm rate according to the status information of the photovoltaic power station is:

[0083] Calculate the alarm rate based on the alarm number AN, fault number FN and operation number RN and failure rate The total alarm rate

[0084] As an implementation mode of the present invention, the process of determining the health status of the photovoltaic power station according to the average power generation efficiency of the entire station, the failure rate of the inverters of the entire station and the total alarm rate is as follows:

[0085] Calculating health status score Among them, α, β, and γ are weight coefficients. α is determined according to the weather and environmental climate of the photovoltaic power station, and β and γ are determined according to the performance parameters and service life of the photovoltaic modules. α+β+γ=1;

[0086] The health status of the photovoltaic power station is evaluated according to the health status score HL.

[0087] The division of modules in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional module in each embodiment of the present application may be integrated into a processor, or may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated modules may be implemented in the form of hardware or in the form of software functional modules.

[0088] Embodiment 3

[0089] A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the method for evaluating the health status of a photovoltaic power station are implemented, for example, including: obtaining status information of the photovoltaic power station; calculating the average power generation efficiency of the entire station according to the status information of the photovoltaic power station; The failure rate FP and total alarm rate ATP of the inverters in the whole station; based on the average power generation efficiency of the whole station The health status of the photovoltaic power station is determined by the failure rate FP and the total alarm rate ATP of the inverters of the entire station. The memory may include a memory, such as a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk memory, etc. The processor, the network interface, and the memory are interconnected through an internal bus, and the internal bus may be an industrial standard architecture bus, a peripheral component interconnection standard bus, an extended industrial standard structure bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. The memory is used to store programs. Specifically, the program may include a program code, and the program code includes computer operation instructions. The memory may include a memory and a non-volatile memory, and provide instructions and data to the processor.

[0090] Embodiment 4

[0091] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for evaluating the health status of a photovoltaic power station are implemented, for example, including: obtaining status information of the photovoltaic power station; calculating the average power generation efficiency of the entire station according to the status information of the photovoltaic power station; The failure rate FP and total alarm rate ATP of the inverters in the whole station; based on the average power generation efficiency of the whole station The health status of the photovoltaic power station is determined by the failure rate FP and the total alarm rate ATP of the inverters of the entire station. Specifically, the computer-readable storage medium includes, but is not limited to, for example, volatile memory and / or non-volatile memory. The volatile memory may include a random access memory (RAM) and / or a cache memory (cache), etc. The non-volatile memory may include a read-only memory (ROM), a hard disk, a flash memory, an optical disk, a magnetic disk, etc.

[0092] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0093] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0094] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0095] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0096] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and disclosure of the invention. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0097] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0098] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A method for evaluating the health status of a photovoltaic power station, characterized in that: include: Get the status information of the photovoltaic power station; Calculate the average power generation efficiency of the entire station based on the status information of the photovoltaic power station The failure rate FP and total alarm rate ATP of all inverters in the station; According to the average power generation efficiency of the whole station The failure rate FP and total alarm rate ATP of all inverters in the station determine the health status of the PV power station.

2. The method for evaluating the health status of a photovoltaic power station according to claim 1, characterized in that: The process of calculating the average power generation efficiency of the entire station based on the status information of the photovoltaic power station is as follows: Calculate the total power generation efficiency of the entire station based on the power generation efficiency e of each inverter Calculate the average power generation efficiency of the entire station based on the total power generation efficiency E at the entire station level Where n is the total number of inverters in the station. 0≤e≤1.

3. The method for evaluating the health status of a photovoltaic power station according to claim 1, characterized in that: The process of calculating the failure rate of the inverters in the entire station based on the status information of the photovoltaic power station is as follows: Calculate the failure rate of the inverters in the entire station based on the number of normal operating inverters R and the number of faulty inverters F in the power station. Where n is the total number of inverters in the station.

4. The method for evaluating the health status of a photovoltaic power station according to claim 1, characterized in that: The process of calculating the total alarm rate according to the status information of the photovoltaic power station is as follows: Calculate the alarm rate based on the alarm number AN, fault number FN and operation number RN and failure rate The total alarm rate 5. The method for evaluating the health status of a photovoltaic power station according to claim 1, characterized in that: The process of determining the health status of the photovoltaic power station according to the average power generation efficiency of the entire station, the failure rate of the inverters of the entire station and the total alarm rate is as follows: Calculating health status score Among them, α, β, and γ are weight coefficients. α is determined according to the weather and environmental climate of the photovoltaic power station, and β and γ are determined according to the performance parameters and service life of the photovoltaic modules. α+β+γ=1; The health status of the photovoltaic power station is evaluated according to the health status score HL.

6. A photovoltaic power station health status assessment system, characterized in that: include: An acquisition module is used to obtain status information of a photovoltaic power station; The calculation module is used to calculate the average power generation efficiency of the entire station based on the status information of the photovoltaic power station. The failure rate FP and total alarm rate ATP of all inverters in the station; Evaluation module, used to calculate the average power generation efficiency of the whole station The failure rate FP and total alarm rate ATP of all inverters in the station determine the health status of the PV power station.

7. The photovoltaic power station health status assessment system according to claim 5, characterized in that: The process of calculating the average power generation efficiency of the entire station based on the status information of the photovoltaic power station is as follows: Calculate the total power generation efficiency of the entire station based on the power generation efficiency e of each inverter Calculate the average power generation efficiency of the entire station based on the total power generation efficiency E at the entire station level Where n is the total number of inverters in the station. 0≤e≤1.

8. The photovoltaic power station health status assessment system according to claim 5, characterized in that: The process of calculating the failure rate of the inverters in the entire station based on the status information of the photovoltaic power station is as follows: Calculate the failure rate of the inverters in the entire station based on the number of normal operating inverters R and the number of faulty inverters F in the power station. Where n is the total number of inverters in the station.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method for evaluating the health status of a photovoltaic power station as described in any one of claims 1 to 5 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method for evaluating the health status of a photovoltaic power station as claimed in any one of claims 1 to 5 are implemented.

Images