Photovoltaic power station, inverter operation state identification method, electronic equipment and nonvolatile storage medium

Abstract

The invention discloses a photovoltaic power station, an inverter operation state identification method, electronic equipment and a nonvolatile storage medium, and is applied to the technical field of photovoltaic power generation. The method comprises the steps of obtaining operation state data of a to-be-identified inverter, and matching the operation state data with various derating power characteristics to determine whether the to-be-identified inverter is in a derating operation state or not. And when it is determined that the to-be-identified inverter is in the derating operation state, whether the to-be-identified inverter is in an over-temperature derating state or a power-limiting derating state or an overload derating state is determined according to the operation state data. The problem that the actual operation state of the inverter cannot be accurately judged can be solved, the condition that the inverter is in the derating operation state can be accurately and timely found, and the operation efficiency and reliability of a photovoltaic power station are effectively improved.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic power generation technology, and in particular to a method for identifying the operating status of a photovoltaic power station and inverter, an electronic device, and a non-volatile storage medium. Background Art

[0002] An inverter is a device used to convert the direct current (DC) electricity generated by photovoltaic modules in a photovoltaic power generation system into alternating current (AC) and connect it to the power grid. To ensure the stable operation and power generation efficiency of the photovoltaic power station, relevant technologies monitor the operating status of the inverter. However, it is currently impossible to accurately determine the actual operating status of the inverter, and thus it is impossible to accurately identify whether the inverter's operating status will affect the stable operation and power generation efficiency of the photovoltaic power station.

[0003] In view of this, achieving accurate judgment of the actual operating status of the inverter is a technical problem that needs to be solved by those skilled in the art.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Summary of the Invention

[0005] The present application provides a method for identifying the operating status of a photovoltaic power station and inverter, an electronic device, and a non-volatile storage medium, which can accurately and timely detect when the inverter is in a derated operating state, effectively improving the operating efficiency and reliability of the photovoltaic power station.

[0006] To solve the above technical problems, this application provides the following technical solutions: On one hand, the present application provides a method for identifying an inverter operating state, comprising: Obtain operating status data of the inverter to be identified; the operating status data includes at least real-time operating parameters and static configuration parameters of the inverter to be identified; match the operating status data with the derating state power characteristics to determine whether the inverter to be identified is in a derating operating state; the derating state power characteristics use different characteristics to describe the inverter in the derating operating state; when it is determined that the inverter to be identified is in the derating operating state, determine whether the inverter to be identified is in an over-temperature derating state, a power-limiting derating state, or an overload derating state based on the operating status data.

[0007] Exemplarily, the determining, based on the operating status data, whether the inverter to be identified is in an over-temperature derating state, a power-limiting derating state, or an overload derating state includes: selecting the radiator temperature data of the inverter to be identified from the operating status data, and determining the heating state of the inverter to be identified based on the radiator temperature data; when the heating state meets a preset over-temperature condition, the inverter to be identified is in an over-temperature derating state; when the heating state does not meet the preset over-temperature condition, if the power-limiting data in the operating status data meets a preset limiting condition, the inverter to be identified is in a power-limiting derating state; if the power-limiting data in the operating status data does not meet the preset limiting condition, determining the load state based on the numerical relationship between the active power data of the operating status data and the rated power of the inverter to be identified; when the active power data and the rated power of the inverter to be identified meet a preset overload condition, the inverter to be identified is in an overload derating state.

[0008] Exemplarily, if the power-limiting data in the operating status data meets the preset limiting conditions, then the inverter to be identified is in a power-limiting and derated state, including: first determining from the operating status data whether there is a power-limiting and derated grid-connected telesignaling value; if the operating status data includes a power-limiting and derated grid-connected telesignaling value, and the power-limiting and derated grid-connected telesignaling value is a power-limiting state value, then the inverter to be identified is in a power-limiting and derated state; if the operating status data does not include a power-limiting and derated grid-connected telesignaling value, then counting the number of derated devices of the inverter in the derated operating state in the photovoltaic power station at the current moment; if the ratio of the number of derated devices to the total number of all inverters in the photovoltaic power station is greater than a preset ratio threshold, then the inverter to be identified is in a power-limiting and derated state.

[0009] Exemplarily, obtaining the operating status data of the inverter to be identified includes: obtaining real-time power telemetry values, radiator temperature telemetry values, instantaneous irradiation telemetry values, and derating grid-connected telesignal values ​​of the inverters of the photovoltaic power station within a target time window as real-time operating parameters of the inverter to be identified; obtaining the rated power and installed capacity of the inverter to be identified as static configuration parameters of the inverter to be identified; performing outlier processing on the real-time operating parameters and the static configuration parameters to obtain initial operating status data; the outliers are null values ​​and / or zero values ​​and / or negative values; if the total number of real-time power telemetry values ​​in the initial operating status data is less than the original total number of real-time power telemetry values ​​corresponding to the target time window, then the operating status of the inverter to be identified is not identified; if the total number of real-time power telemetry values ​​in the initial operating status data is greater than or equal to the original total number of real-time power telemetry values ​​corresponding to the target time window, normalizing the real-time power telemetry values ​​of different inverters according to the installed capacity to obtain the operating status data of the inverter to be identified.

[0010] Exemplarily, matching the operating status data with the derated state power characteristics includes: obtaining a first real-time power telemetry value at a first acquisition moment and a second real-time power telemetry value at a second acquisition moment, and calculating the power difference between the first real-time power telemetry value and the second real-time power telemetry value; the second acquisition moment is the next moment of the first acquisition moment; if the power difference is greater than the product of the real-time power telemetry value at the previous moment of the first acquisition moment and a preset adjustment factor, and the standard deviation of the real-time power telemetry values ​​collected between the first acquisition moment and the third acquisition moment is less than the first preset difference threshold, then the inverter to be identified is in a derated operating state; if the power difference is greater than the second acquisition moment The product of the real-time power telemetry value at the next moment and the preset adjustment factor, and the standard deviation of the real-time power telemetry values ​​collected between the fourth collection moment and the first collection moment is less than the first preset difference threshold, then the inverter to be identified is in a derated operation state; wherein, the preset adjustment factor is 20%±Δ1, Δ1 is a fluctuation value; the third collection moment is located after the first collection moment, and the time duration from the first collection moment to the third collection moment is the same as the single collection duration of the operating status data; the fourth collection moment is located before the first collection moment, and the time duration from the fourth collection moment to the first collection moment is the same as the single collection duration of the operating status data.

[0011] Exemplarily, the operating status data is matched with the derated state power characteristics, including: if the standard deviation of each real-time power telemetry value in the operating status data collected once is less than a second preset difference threshold, and the real-time power telemetry value at the current moment is less than the maximum active power value of the day, then the inverter to be identified is in a derated operating state; wherein, the second preset difference threshold is less than the first preset difference threshold.

[0012] Exemplarily, matching the operating status data with the derated state power characteristics includes: calculating the difference coefficient between the instantaneous irradiation telemetry value and the real-time power telemetry value at each collection moment in the operating status data, if each difference coefficient in the operating status data collected once is greater than a third preset difference threshold, then the inverter to be identified is in a derated operating state; or calculating the difference coefficient between the standard real-time power telemetry value and the real-time power telemetry value of the prototype machine at each collection moment in the operating status data, if each difference coefficient in the operating status data collected once is greater than a third preset difference threshold, then the inverter to be identified is in a derated operating state; wherein, the third preset difference threshold is greater than the second preset difference threshold, and less than the first preset difference threshold.

[0013] The present application also provides an electronic device, comprising a processor, wherein the processor is configured to implement the steps of any of the above inverter operating status identification methods when executing a computer program stored in a memory.

[0014] The present application also provides a non-volatile storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of any of the above inverter operating status identification methods are implemented.

[0015] Finally, the present application also provides a photovoltaic power station, which, when executed by a processor, implements the steps of any of the above inverter operating status identification methods.

[0016] The advantages of the technical solution provided by this application are that, by collecting multiple indicator data of the inverter of the photovoltaic power station in real time, it can comprehensively reflect the actual operating status of the inverter. By using multiple derated power feature identification methods, it can accurately identify the derated operating status of the inverter. After determining that it is in the derated operating state, it accurately distinguishes the specific cause of the derated operation by analyzing the inverter operating status data, thereby achieving comprehensive, real-time and accurate identification of the derated operating status of the inverter of the photovoltaic power station, which is conducive to improving the operating efficiency and reliability of the photovoltaic power station. In addition, this application also provides corresponding electronic equipment, non-volatile storage medium and photovoltaic power station for implementing the inverter operating status identification method, further making the method more practical. The electronic equipment, non-volatile storage medium and photovoltaic power station have corresponding advantages.

[0017] The technical features mentioned above, the technical features to be mentioned below, and the technical features shown individually in the accompanying drawings may be combined arbitrarily, as long as the combined technical features do not conflict with each other. All possible feature combinations are technical contents explicitly described in this application. Any of the multiple sub-features included in the same statement can be applied independently, and does not necessarily have to be applied in conjunction with other sub-features.

[0018] It should be understood that the foregoing general description and the following detailed description are merely illustrative and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. 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.

[0020] Figure 1 A flow chart of a method for identifying the operating status of an inverter provided in this application; Figure 2 A flow chart of another inverter operating status identification method provided in this application; Figure 3 This is a schematic structural diagram of an exemplary embodiment of the inverter operating status identification device provided in this application; Figure 4 This is a schematic structural diagram of an exemplary embodiment of the electronic device provided in this application; Figure 5 This is a schematic structural diagram of an exemplary embodiment of a photovoltaic power station provided in this application. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The terms "first," "second," "third," etc. in the specification and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. The term "exemplary" means "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as superior or better than other embodiments.

[0022] During actual operation, the inverter may enter a derated operating state due to various reasons. The so-called derated operating state means that its output power is lower than the rated power. The derated operating state of the inverter will affect the power generation efficiency of the photovoltaic power station. If it is in this state for a long time, the photovoltaic power station will not be able to operate stably and reliably.

[0023] When monitoring the operating status of the inverter in a photovoltaic power generation system, related technologies use a single temperature indicator or power indicator to determine whether the inverter is in a derated operating state. This method cannot fully reflect the actual operating conditions of the inverter, resulting in an inability to accurately identify whether the inverter's operating status will affect the stable operation and power generation efficiency of the photovoltaic power station. In addition, some methods cannot obtain the inverter's operating data in real time, which means that the inverter's derated operating state cannot be discovered in a timely manner. In addition, when related technologies determine whether the inverter is in a derated operating state based on the inverter's operating data, they are easily interfered with by external factors, resulting in misjudgments and unable to guarantee the accuracy of the judgment of whether the inverter's current operation will affect the stable operation and power generation efficiency of the photovoltaic power station.

[0024] In view of this, the present application matches the real-time operating parameters and static configuration parameters of the inverter to be identified with the temperature derating power characteristics and / or power limiting derating power characteristics and / or overload derating power characteristics to determine whether the inverter to be identified is in a derating operation state. When it is determined that the inverter to be identified is in a derating operation state, it is determined whether the inverter to be identified is in an over-temperature derating state, a power limiting derating state, or an overload derating state based on the real-time operating parameters and static configuration parameters. Through a variety of monitoring means, it is comprehensively judged whether the inverter is operating at a derating, thereby achieving comprehensive, real-time and accurate judgment of whether the photovoltaic power station inverter is operating at a derating, thereby improving the operating efficiency and reliability of the photovoltaic power station.

[0025] After introducing the technical solution of the present application, various non-limiting embodiments of the present application are described in detail below. In order to better illustrate the present application, numerous specific details are given in the specific embodiments below. It should be understood by those skilled in the art that the present application can also be implemented without these specific details. In other examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the main purpose of the present application. First, please refer to Figure 1 , Figure 1 This is a flow chart of a method for identifying the operating status of an inverter provided in this application. This application may include the following contents:

[0026] S101: Acquire operating status data of the inverter to be identified.

[0027] Among them, the inverters to be identified are inverters that the photovoltaic power station needs to identify whether they are in a derated operating state. The number of inverters to be identified is determined according to the identification scenario. The operating status data at least includes the real-time operating parameters and static configuration parameters of the inverters to be identified. The real-time operating parameters are some indicators that reflect the operation process of the inverter, including but not limited to real-time power, radiator temperature, and instantaneous irradiation. The static configuration parameters are the hardware parameters and status configuration information of the inverter when it leaves the factory, such as whether the inverter is set to power limit and derated grid connection, the rated power of the inverter, the installed capacity and other basic information.

[0028] S102: Match the operating status data with the derated state power characteristics to determine whether the inverter to be identified is in the derated operating state.

[0029] Among them, the derated state power feature is to use multiple different features to describe the inverter in the derated operating state. The derated state power feature includes at least two different features to describe the inverter in the derated operating state, such as using the power change rate to describe the inverter in the derated operating state, or using the power standard deviation to describe the inverter in the derated operating state. For example, the power change of the inverter when it is in the derated operating state can be analyzed in advance, and the corresponding power change curve can be generated as the derated state power feature based on the power change rate or the power standard deviation. For the simultaneous use of multiple derated state power features, as long as the current operating state data can match the derated state power feature corresponding to one of the features, it is preliminarily determined that the inverter to be identified is in the derated operating state.

[0030] S103: When it is determined that the inverter to be identified is in a derating operation state, determining whether the inverter to be identified is in an over-temperature derating state, a power-limiting derating state, or an overload derating state according to the operation state data.

[0031] When the previous step preliminarily determines that the inverter is in a derating operation state, in order to further improve the recognition accuracy of the derating operation state of the inverter, it is also possible to accurately distinguish whether the cause of the derating operation state is overtemperature derating, power limiting derating or overload derating by calculating various parameters and indicators in the operation state data. For the sake of convenience, the case where the derating operation state is caused by overtemperature can be defined as overtemperature derating state, the case where the derating operation state is caused by power limiting can be defined as power limiting derating state, and the case where the derating operation state is caused by overload can be defined as overload derating state.

[0032] In the technical solution provided in this application, by real-time collection of various indicator data of the inverter of the photovoltaic power station, the actual operating conditions of the inverter can be fully reflected. By adopting various derating power feature identification methods, the derating operating status of the inverter can be accurately identified. After determining that it is in the derating operating state, the specific reasons for the derating operation are accurately distinguished by analyzing the operating status data of the inverter, thereby achieving comprehensive, real-time and accurate identification of the derating operating status of the inverter of the photovoltaic power station, which is conducive to improving the operating efficiency and reliability of the photovoltaic power station.

[0033] In the above embodiment, there is no limitation on how to accurately distinguish the cause of the derated operating state based on the operating state data. Based on the above embodiment, the present application further provides multiple implementation methods for accurately distinguishing the cause of the derated operating state, which may include the following:

[0034] Exemplarily, the radiator temperature data of the inverter to be identified is selected from the operating status data, and the heating state of the inverter to be identified is determined based on the radiator temperature data; when the heating state meets the preset overtemperature condition, the inverter to be identified is in an overtemperature derating state; when the heating state does not meet the preset overtemperature condition, if the power limiting data in the operating status data meets the preset limit condition, the inverter to be identified is in a power limiting derating state; if the power limiting data in the operating status data does not meet the preset limit condition, the load state is determined based on the numerical relationship between the active power data of the operating status data and the rated power of the inverter to be identified; when the active power data and the rated power of the inverter to be identified meet the preset overload condition, the inverter to be identified is in an overload derating state.

[0035] Among them, the radiator temperature data may, for example, at least include the inverter radiator temperature value within a certain time period. Of course, if the measurement accuracy needs to be further improved, the temperature of different areas of the radiator can be refined in combination with the size of the radiator. The preset over-temperature condition may be that the temperature average exceeds a preset temperature threshold, or the area greater than a preset temperature threshold exceeds the preset area range. This does not affect the implementation of the present invention. For example, if an inverter is identified as being operated at a reduced rating, the average temperature of the inverter radiator during the acquisition period is calculated. If the temperature average is greater than 95°C, the inverter is determined to be over-temperature-reduced. Accordingly, the inverter to be identified is in an over-temperature-reduced state.

[0036] If the inverter to be identified is not in an over-temperature derating state, it can be further determined whether the inverter to be identified is derating due to power restriction. The power restriction data can be a state marked as power restriction and derating grid-connected state, or the presence of power restriction can be measured by counting the number of inverters in the photovoltaic power station that are in a derating operation state. The preset limiting conditions are the standards for representing corresponding power restrictions in different situations. For example, it can be determined from the operating status data whether there is a power restriction and derating grid-connected telesignal value. If the operating status data includes a power restriction and derating grid-connected telesignal value, and the power restriction and derating grid-connected telesignal value is a power restriction state value, then the inverter to be identified is in a power restriction and derating state; if the operating status data does not include a power restriction and derating grid-connected telesignal value, then the number of derating devices of the inverters in the derating operation state in the photovoltaic power station at the current moment is counted; if the ratio of the number of derating devices to the total number of all inverters in the photovoltaic power station is greater than the preset ratio threshold, then the inverter to be identified is in a power restriction and derating state. For example, if an inverter is identified as operating at a reduced rating, the remote signaling point can be used to prioritize power curtailment identification. Specifically, if the inverter is configured with the "Power Curtailment and Grid Connection" point and the uploaded value is 1, where 1 is the specific value indicating the power curtailment state in the remote signaling value for power curtailment and grid connection, the inverter will be marked as operating at a reduced rating. In this example, the power curtailment data is the remote signaling value for power curtailment and grid connection, and the preset limiting condition is that the remote signaling value for power curtailment and grid connection is the power curtailment state value. If the inverter is not configured with the "Power Curtailment and Grid Connection" point, the limiting data is the number of inverters in the PV power station operating at a reduced rating, and the preset limiting condition is that the number of inverters in the reduced rating state is greater than a preset threshold. For example, the limiting condition is based on the ratio between the two. For example, the number of inverters in the power station operating at a reduced rating is calculated. If the number of reduced-rating devices is greater than 1 / 3 of the total number of inverters in the power station, the inverter is determined to be operating at a reduced rating.

[0037] If the inverter is not in a power-limited or derated state, the system can further determine whether the inverter is derated due to overload. For example, if the inverter is identified as derated, the system calculates the average active power (i.e., the raw value) during the acquisition period. If the average power value is greater than 0.9% of the rated power, the inverter is determined to be in a power-limited or derated state.

[0038] As can be seen from the above, this embodiment can accurately distinguish different causes such as overtemperature derating, power limit derating, and overload derating by calculating indicators such as radiator temperature data, power limit telemetering measurement point status, and active power average, thereby achieving accurate identification of the inverter derating operating status.

[0039] In order to further improve the recognition accuracy of the derated operating state of the inverter, based on the above embodiment, the present application also provides an implementation method for obtaining the operating state data of the inverter to be identified, which may include the following:

[0040] The real-time power telemetry values, radiator temperature telemetry values, instantaneous irradiation telemetry values ​​and derating grid-connected telesignal values ​​of the inverters of the photovoltaic power station within the target time window are obtained as the real-time operating parameters of the inverter to be identified; the rated power and installed capacity of the inverter to be identified are obtained as the static configuration parameters of the inverter to be identified; the real-time operating parameters and the static configuration parameters are processed for abnormal values ​​to obtain initial operating status data; the abnormal values ​​are null values ​​and / or zero values ​​and / or negative values; if the total number of real-time power telemetry values ​​in the initial operating status data is less than the original total number of real-time power telemetry values ​​corresponding to the target time window, the operating status of the inverter to be identified is not identified; if the total number of real-time power telemetry values ​​in the initial operating status data is greater than or equal to the original total number of real-time power telemetry values ​​corresponding to the target time window, the real-time power telemetry values ​​of different inverters are normalized according to the installed capacity to obtain the operating status data of the inverter to be identified.

[0041] In this embodiment, the real-time power telemetry value, the radiator temperature telemetry value, and the instantaneous irradiation telemetry value belong to the telemetry data, and the telemetry data is the real-time data received by the telemetry terminal through the corresponding sensor. The real-time power is the current output power of the inverter, the radiator temperature is used to reflect the heat dissipation status of the inverter, and the instantaneous irradiation is the irradiation intensity of the photovoltaic module. The derating grid-connected telemetering value is a signal value of whether the inverter is in the derating grid-connected state. The derating grid-connected value refers to the state in which the inverter reduces the output power but still operates in conjunction with the grid due to certain reasons such as excessive temperature, grid restrictions, etc. The telemetering value is usually a binary signal, such as 0 or 1, indicating whether it is in this state. The data acquisition parameters can be set in advance. The data acquisition parameters include at least a time window and a data acquisition point. The time window is the time period for collecting operating data. For example, if the effective time range is set in advance, the time window can be determined according to the current time, such as 9:00 am to the current time as the time window, and the data acquisition point is the time at which data is collected, such as extracting the last 6 5-minute interval data points from the time window. For example, if Figure 2 As shown, taking into account the period of sufficient sunlight or the peak and valley electricity price period of the power grid, the required real-time power, radiator temperature, instantaneous irradiation and other telemetry values ​​of the inverter from 9:00 to 16:00 up to the current moment (based on uploading 1 frame of data every 5 minutes), derating grid-connected telesignaling value, inverter rated power, installed capacity and other basic information can be selected. Assuming that the current time is 14:30, it is necessary to work backwards 30 minutes (6×5 minutes) from 14:30, that is, to filter the 6 data frames within 14:00-14:30. In order to improve the validity of the data, the collected data can be processed by data association and matching, such as aligning the real-time power, temperature, and irradiance by timestamp, and associating the derating status with the power and temperature data at the corresponding moment. In order to further improve the accuracy of the data, such as Figure 2As shown, data cleaning and data normalization can also be performed, such as removing null values, zero values, and negative values. For the sake of ease of description, the operating status data obtained after outlier processing is defined as the initial operating status data. In addition, in order to ensure the effectiveness of inverter operating status identification, taking 6 frames of collected data as an example, if the real-time power data points are less than 6 frames, no subsequent operations will be performed. The real-time power data of different inverters can be normalized by the installed capacity of the inverter through the relationship PR=Yf / Yr, where PR represents the operating status data, Yf represents the real-time power telemetry value of the inverter, and Yr represents the installed capacity of the corresponding inverter. This can eliminate the impact of the installed capacity on the power generation level and improve the identification of the inverter's derated operating state.

[0042] The above embodiment does not limit how to match the operating status data with the derated power characteristics. Based on the above embodiment, the present invention further provides an exemplary implementation method, which may include the following:

[0043] An exemplary example uses the power characteristic of the derating state to describe the inverter in the derating operation state using the power change rate, obtains the first real-time power telemetry value at the first collection moment and the second real-time power telemetry value at the second collection moment, and calculates the power difference between the first real-time power telemetry value and the second real-time power telemetry value; the second collection moment is the next moment of the first collection moment; if the power difference is greater than the product of the real-time power telemetry value at the previous moment of the first collection moment and the preset adjustment factor, and the standard deviation of the real-time power telemetry values ​​collected between the first collection moment and the third collection moment is less than the first preset difference threshold, then the inverter to be identified is in the derating operation state; if the power difference is greater than the product of the real-time power telemetry value at the next moment of the second collection moment and the preset adjustment factor, and the standard deviation of the real-time power telemetry values ​​collected between the fourth collection moment and the first collection moment is less than the first preset difference threshold, then the inverter to be identified is in the derating operation state.

[0044] In this embodiment, the preset adjustment factor is 20% ± Δ1, where Δ1 is the fluctuation value, i.e., a range of fluctuations around 20%. The third collection time is after the first collection time, and the duration from the first collection time to the third collection time is the same as the duration of a single collection of operating status data. The fourth collection time is before the first collection time, and the duration from the fourth collection time to the first collection time is the same as the duration of a single collection of operating status data. The same single collection duration refers to the duration of each collection of operating status data, such as the duration of 6 frames of data, or half an hour of data. For example, the first preset difference threshold is 0.3%. If the difference between the two frames of inverter real-time power data is greater than 20% of the previous frame's value and the standard deviation of the device real-time power within the next 30 minutes is less than 0.3%, or if the difference between the two frames of inverter real-time power data is greater than 20% of the next frame's value and the standard deviation of the device real-time power within the previous 30 minutes is less than 0.3%, then the inverter is marked as derated.

[0045] Another exemplary example of the derated state power feature is to use the power standard deviation to describe the inverter in the derated operation state. If the standard deviation of each real-time power telemetry value in the single-collected operation status data is less than the second preset difference threshold, and the real-time power telemetry value at the current moment is less than the maximum active power value of the day, then the inverter to be identified is in the derated operation state.

[0046] In this embodiment, the second preset difference threshold is smaller than the first preset difference threshold. For example, the second preset difference threshold is 0.05%. For example, if the standard deviation of the real-time power of the inverter is less than 0.05% within 30 minutes, and the power value at the current moment is less than the maximum active power of the day, the inverter is marked as derated.

[0047] Another exemplary example uses the derated power feature to describe an inverter in a derated operating state using instantaneous irradiation or standard parameters corresponding to a prototype unit, where the standard parameter is a standard real-time power telemetry value. The difference coefficient between the instantaneous irradiation telemetry value and the real-time power telemetry value at each acquisition moment in the operating state data is calculated. If each difference coefficient in the single acquisition of operating state data is greater than a third preset difference threshold, the inverter to be identified is in a derated operating state. Alternatively, the difference coefficient between the standard real-time power telemetry value and the real-time power telemetry value of the prototype unit at each acquisition moment in the operating state data is calculated. If each difference coefficient in the single acquisition of operating state data is greater than a third preset difference threshold, the inverter to be identified is in a derated operating state.

[0048] In this embodiment, the real-time power telemetry value is also the real-time power generation efficiency of the inverter. The third preset difference threshold is greater than the second preset difference threshold and less than the first preset difference threshold. The difference coefficient between the instantaneous irradiation and the real-time power of the inverter during the acquisition period is calculated. The third preset difference threshold can be, for example, 0.1. If the difference coefficient is greater than 0.1 for 30 consecutive minutes (or 6 frames), the inverter is marked as derated. The difference coefficient coe can be calculated according to the relationship To determine, PR0 is the real-time power telemetry value, R is the instantaneous irradiance of the weather station ( ).

[0049] To further improve inverter operating status identification, the power change rate can be preferentially used as the derated state power characteristic for comparison with the operating status data. If there is a mismatch, the power standard deviation is used as the derated state power characteristic for comparison with the operating status data. If a match is found, the inverter corresponding to the operating status data is directly determined to be in a derated operating state. If the power standard deviation does not match the derated state power characteristic when comparing the operating status data, the derated state power characteristics corresponding to the instantaneous irradiation and the standard parameters of the prototype are then used for comparison with the operating status data. If there is still a mismatch, the inverter corresponding to the operating status data is not in a derated operating state.

[0050] It should be noted that there is no strict order in which the steps in this application are performed. As long as they comply with the logical order, these steps can be performed simultaneously or in a predetermined order. Figure 1-Figure 2 This is just a schematic and does not mean that this is the only execution order.

[0051] The present application also provides a corresponding device for the inverter operating status identification method, which further makes the method more practical. Among them, the device can be described from the perspective of functional modules and hardware. The inverter operating status identification device provided by the present application is introduced below. The device is used to implement the inverter operating status identification method provided by the present application. In this embodiment, the inverter operating status identification device may include or be divided into one or more program modules. The one or more program modules are stored in a storage medium and executed by one or more processors to complete the inverter operating status identification method disclosed in Example 1. The program module referred to in this application refers to a series of computer program instruction segments that can complete specific functions. It is more suitable for describing the execution process of the inverter operating status identification device in the storage medium than the program itself. The following description will specifically introduce the functions of each program module of this embodiment. The inverter operating status identification device described below and the inverter operating status identification method described above can be referenced to each other.

[0052] From the perspective of functional modules, see Figure 3 , Figure 3 This is a structural diagram of an inverter operating status identification device provided by this application in a specific embodiment. The device may include:

[0053] The operating status data acquisition module 301 is used to acquire operating status data of the inverter to be identified; the operating status data at least includes real-time operating parameters and static configuration parameters of the inverter to be identified.

[0054] The preliminary identification module 302 is used to match the operating status data with the derated state power characteristics to determine whether the inverter to be identified is in a derated operating state; the derated state power characteristics use different characteristics to describe the inverter in the derated operating state.

[0055] The state determination module 303 is configured to determine whether the inverter to be identified is in an over-temperature derating state, a power-limiting derating state, or an overload derating state according to the operating state data when it is determined that the inverter to be identified is in a derating operating state.

[0056] Illustratively, in some implementations of this embodiment, the state determination module 303 may be further used to: select the heat sink temperature data of the inverter to be identified from the operating state data, and determine the heating state of the inverter to be identified based on the heat sink temperature data; when the heating state meets the preset over-temperature condition, the inverter to be identified is in an over-temperature derating state; when the heating state does not meet the preset over-temperature condition, if the power-limiting data in the operating state data meets the preset limiting condition, the inverter to be identified is in a power-limiting derating state; if the power-limiting data in the operating state data does not meet the preset limiting condition, the load state is determined based on the numerical relationship between the active power data of the operating state data and the rated power of the inverter to be identified; when the active power data and the rated power of the inverter to be identified meet the preset overload condition, the inverter to be identified is in an overload derating state.

[0057] As an exemplary implementation of the above embodiment, the above-mentioned state determination module 303 can also be used to: first determine whether there is a power-limited and reduced-rate grid-connected telesignaling value in the operating state data; if the operating state data includes the power-limited and reduced-rate grid-connected telesignaling value, and the power-limited and reduced-rate grid-connected telesignaling value is the power-limited state value, then the inverter to be identified is in the power-limited and reduced-rate state; if the operating state data does not include the power-limited and reduced-rate grid-connected telesignaling value, then count the number of reduced-rate devices of the inverter in the reduced-rate operating state in the photovoltaic power station at the current moment; if the ratio of the number of reduced-rate devices to the total number of all inverters in the photovoltaic power station is greater than the preset ratio threshold, then the inverter to be identified is in the power-limited and reduced-rate state.

[0058] Illustratively, in some other implementations of this embodiment, the operating status data acquisition module 301 may be further used to: acquire the real-time power telemetry value, radiator temperature telemetry value, instantaneous irradiation telemetry value, and derating grid-connected telesignal value of the inverter of the photovoltaic power station within the target time window as the real-time operating parameters of the inverter to be identified; acquire the rated power and installed capacity of the inverter to be identified as the static configuration parameters of the inverter to be identified; perform abnormal value processing on the real-time operating parameters and the static configuration parameters to obtain initial operating status data; the abnormal values ​​are null values ​​and / or zero values ​​and / or negative values; if the total number of real-time power telemetry values ​​in the initial operating status data is less than the original total number of real-time power telemetry values ​​corresponding to the target time window, then the operating status of the inverter to be identified is not identified; if the total number of real-time power telemetry values ​​in the initial operating status data is greater than or equal to the original total number of real-time power telemetry values ​​corresponding to the target time window, the real-time power telemetry values ​​of different inverters are normalized according to the installed capacity to obtain the operating status data of the inverter to be identified.

[0059] For example, in some other implementations of this embodiment, the preliminary identification module 302 may be further used to: obtain a first real-time power telemetry value at a first acquisition moment and a second real-time power telemetry value at a second acquisition moment, and calculate a power difference between the first real-time power telemetry value and the second real-time power telemetry value; the second acquisition moment is the moment after the first acquisition moment; if the power difference is greater than the product of the real-time power telemetry value at the previous moment of the first acquisition moment and the preset adjustment factor, and the standard deviation of the real-time power telemetry values ​​collected between the first acquisition moment and the third acquisition moment is less than the first preset difference threshold, then the inverter to be identified is in a derated operation state; if the power difference is large, If the product of the real-time power telemetry value at the next moment after the second collection moment and the preset adjustment factor, and the standard deviation of the real-time power telemetry values ​​collected between the fourth collection moment and the first collection moment is less than the first preset difference threshold, then the inverter to be identified is in a derated operation state; wherein the preset adjustment factor is 20%±Δ1, Δ1 is a fluctuation value; the third collection moment is after the first collection moment, and the time duration from the first collection moment to the third collection moment is the same as the single collection duration of the operating status data; the fourth collection moment is before the first collection moment, and the time duration from the fourth collection moment to the first collection moment is the same as the single collection duration of the operating status data.

[0060] Exemplarily, in some other implementations of this embodiment, the above-mentioned preliminary identification module 302 can be further used for: if the standard deviation of each real-time power telemetry value in the operating status data collected once is less than the second preset difference threshold, and the real-time power telemetry value at the current moment is less than the maximum active power value of the day, then the inverter to be identified is in a derated operating state; wherein the second preset difference threshold is less than the first preset difference threshold.

[0061] Exemplarily, in some other implementations of this embodiment, the above-mentioned preliminary identification module 302 can be further used to: calculate the difference coefficient between the instantaneous irradiation telemetry value and the real-time power telemetry value at each collection moment in the operating status data; if each difference coefficient in the operating status data collected once is greater than a third preset difference threshold, the inverter to be identified is in a derated operating state; or, calculate the difference coefficient between the standard real-time power telemetry value and the real-time power telemetry value of the prototype machine at each collection moment in the operating status data; if each difference coefficient in the operating status data collected once is greater than a third preset difference threshold, the inverter to be identified is in a derated operating state; wherein the third preset difference threshold is greater than the second preset difference threshold, and less than the first preset difference threshold.

[0062] As can be seen from the above, this embodiment can accurately and timely detect that the inverter is in a derated operating state, effectively improving the operating efficiency and reliability of the photovoltaic power station.

[0063] The inverter operation status identification device mentioned above is described from the perspective of functional modules. Furthermore, the present application also provides an electronic device, which is described from the perspective of hardware. Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application in one embodiment. Figure 4 As shown, the electronic device includes a memory 40 for storing a computer program; and a processor 41 for implementing the steps of the inverter operating status identification method mentioned in any of the above embodiments when executing the computer program.

[0064] The processor 41 may include one or more processing cores, such as a quad-core processor or an octa-core processor. The processor 41 may also be a controller, a microcontroller, a microprocessor, or other data processing chip. The processor 41 may be implemented in at least one hardware form selected from the group consisting of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 41 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 41 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 41 may also include an AI (Artificial Intelligence) processor, which is used to handle computing operations related to machine learning.

[0065] The memory 40 may include one or more computer-readable storage media, which may be non-transitory. The memory 40 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In some embodiments, the memory 40 may be an internal storage unit of the electronic device, such as a server's hard drive. In other embodiments, the memory 40 may also be an external storage device of the electronic device, such as a plug-in hard drive equipped on a server, a Smart Media Card (SMC), a Secure Digital (SD) card, a flash memory card, etc. Furthermore, the memory 40 may include both an internal storage unit and an external storage device of the electronic device. The memory 40 may be used not only to store application software installed in the electronic device and various data, such as program code used in executing the inverter operating status identification method, but also to temporarily store data that has been output or is about to be output. In this embodiment, the memory 40 is used to store at least the following computer program 401. When loaded and executed by the processor 41, the computer program is capable of implementing the relevant steps of the inverter operating status identification method disclosed in any of the aforementioned embodiments. In addition, the resources stored in memory 40 may also include an operating system 402 and data 403, which may be stored in a temporary or permanent manner. Operating system 402 may include Windows, Unix, Linux, etc. Data 403 may include, but is not limited to, data corresponding to the inverter operating status identification result.

[0066] In some embodiments, the electronic device may further include a display screen 42, an input / output interface 43, a communication interface 44 or a network interface, a power supply 45 and a communication bus 46. The display screen 42 and the input / output interface 43, such as a keyboard, are user interfaces. Optional user interfaces may also include standard wired interfaces, wireless interfaces, and the like. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch screen, and the like. The display may also be appropriately referred to as a display screen or a display unit, which is used to display information processed in the electronic device and to display a visual user interface. The communication interface 44 may optionally include a wired interface and / or a wireless interface, such as a WI-FI interface, a Bluetooth interface, and the like, which are generally used to establish a communication connection between the electronic device and other electronic devices. The communication bus 46 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, and the like. The bus may be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, Figure 4 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.

[0067] Those skilled in the art will understand that Figure 4 The structure shown in the figure does not constitute a limitation on the electronic device, and may include more or fewer components than shown in the figure, for example, it may also include a sensor 47 to realize various functions.

[0068] It is understood that if the inverter operating status identification method in the above-mentioned embodiment is implemented as a software functional unit and sold or used as an independent product, it can be stored in a non-volatile storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the relevant art, 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 performs all or part of the steps of the method in each embodiment of the present invention. The aforementioned storage medium includes, but is not limited to: a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), an electrically erasable programmable ROM, a register, a hard drive, a multimedia card, a card-type memory (such as SD or DX memory), a magnetic memory, a removable disk, a CD-ROM, a magnetic disk, or an optical disk, among other media capable of storing program code. Based on this, the present invention also provides a non-volatile storage medium storing a computer program. When executed by a processor, this computer program performs the steps of identifying the inverter operating status described in any of the above embodiments.

[0069] It is understandable that if the inverter operating status identification method in the above embodiment is implemented in the form of a software functional unit and sold or used as an independent product, the computer software product does not need to be stored in a physical storage medium. For example, it can be directly transmitted to a computer or other device with information processing capabilities via a wired network or a wireless network to execute all or part of the steps of the method in each embodiment of the present invention. Based on this understanding, the technical solution of the present invention, or the part that contributes to the relevant technology, or all or part of the technical solution can be embodied in the form of a software product. Based on this, the present invention also provides a computer program product that stores a computer program. When the computer program is executed by a processor, it performs the steps of identifying the inverter operating status as described in any of the above embodiments.

[0070] Finally, this application also provides a photovoltaic power station, such as Figure 5 As shown, it at least includes an inverter 501 and a processor 41, and the processor 41 is connected to each inverter 501; when the processor 41 executes, the steps of the inverter operation status identification method recorded in any one of the above embodiments are performed.

[0071] To facilitate those skilled in the art to better understand the technical solution of the present invention, this application also provides an exemplary implementation method. The process of identifying whether the operating status of each inverter included in a photovoltaic power station is derated may include the following:

[0072] A1: Data acquisition: Select the inverter's first six frames (based on uploading one frame of data every five minutes) between 9:00 and 16:00, including the required real-time power, radiator temperature, instantaneous irradiation and other telemetry values, derating grid-connected telesignal values, and basic information such as the inverter's rated power and installed capacity.

[0073] For example, three power stations in a certain area can be selected and the operating status data from February 1 to February 10 can be collected. The operating status of each inverter in the photovoltaic power station can be obtained through manual communication with the power station.

[0074] A2: Data cleaning: After removing null values, zero values, and negative values, if the real-time power data points are less than 6 frames, no subsequent operations will be performed.

[0075] A3: Normalization: Normalize the real-time power data of different inverters by the installed capacity of the inverter to eliminate the impact of the installed capacity on the power generation level.

[0076] A4: Identification of inverter derating status: For each inverter that needs to be identified in the PV power station, after obtaining the corresponding operating status data in step A3, each inverter is identified as being in a derating state using the derating power curve characteristics corresponding to the following three strategies. If any one of the following strategies is met, the inverter is marked as derating:

[0077] Strategy 1: If the difference between the two frames of real-time power data of the inverter is greater than 20% of the previous frame's value and the standard deviation of the device's real-time power in the next 30 minutes is less than 0.3%, or if the difference between the two frames of real-time power data of the inverter is greater than 20% of the next frame's value and the standard deviation of the device's real-time power in the previous 30 minutes is less than 0.3%, the inverter is marked as derated.

[0078] Strategy 2: If the standard deviation of the inverter's real-time power within 30 minutes is less than 0.05%, and the current power value is less than the maximum active power of the day, the inverter is marked as derated.

[0079] Strategy 3: Calculate the difference coefficient between the instantaneous irradiation and the real-time power of the inverter during the acquisition period. If the difference coefficient is greater than 0.1 for 30 consecutive minutes (or 6 frames), the inverter is marked as derated.

[0080] A5: Identify the inverter's derating operating status using the following three methods.

[0081] If the inverter is identified as operating at a reduced rating, the average temperature of the inverter heat sink during the acquisition period is calculated. If the average temperature is greater than 95°C, the inverter is determined to be operating at an overtemperature and reduced rating.

[0082] If it does not fall under overtemperature derating, power restriction derating identification is performed: the remote signaling measurement point is used to preferentially identify the inverter for power restriction (i.e., the inverter is configured with the "power restriction derating grid connection" measurement point and the uploaded value is 1), and the inverter is marked as power restriction derating; otherwise, the number of derating inverters in the power station is calculated. If the number of derating devices is greater than 1 / 3 of the total number of inverters in the power station, the inverter is determined to be power restriction derating.

[0083] If it does not fall under power-limiting derating, overload derating identification is performed: If the inverter is identified as operating at a derating rate, the average active power (original value) during the acquisition period is calculated. If the average power value is greater than 0.9% of the rated power, the inverter is determined to be operating at a power-limiting derating rate.

[0084] Based on the data collected in step A1, the technical solution provided by the present invention is used to identify the derating operation status of the equipment in the photovoltaic power station. The identification results are shown in Table 1 below:

[0085] Table 1 Inverter derating operation status identification results

[0086]

[0087] By verifying the derated inverter operating status at three power plants from February 1st to 10th, the accuracy of identifying derated operating status at each plant reached 100% within the analysis period. By accurately identifying the derated inverter operating status and distinguishing the causes of the derated status, misjudgments and missed detections can be reduced, improving operation and maintenance efficiency. Dynamic monitoring and real-time evaluation of inverter operating status can help maintenance personnel identify problems promptly and reduce power generation losses. This method also helps optimize inverter operation and management, improving the overall operational efficiency of power plants.

[0088] The above is a detailed introduction to a photovoltaic power station and inverter operating status identification method, electronic device, and non-volatile storage medium provided by the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. It should be pointed out that based on the embodiments in the present application, for ordinary technicians in this technical field, all other embodiments obtained without creative work are within the scope of protection of the present application. Without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the present application.

Claims

1. A method for identifying the operating status of an inverter, characterized in that: include: Obtaining operating status data of the inverter to be identified; The operating status data at least includes real-time operating parameters and static configuration parameters of the inverter to be identified; Matching the operating status data with a derated state power feature to determine whether the inverter to be identified is in a derated operating state; the derated state power feature uses multiple different features to describe the inverter in the derated operating state; When it is determined that the inverter to be identified is in a derating operation state, it is determined according to the operation state data whether the inverter to be identified is in an over-temperature derating state, a power-limiting derating state, or an overload derating state.

2. The inverter operating status identification method according to claim 1, characterized in that: The step of determining, based on the operating status data, whether the inverter to be identified is in an over-temperature derating state, a power-limited derating state, or an overload derating state includes: selecting heat sink temperature data of the inverter to be identified from the operating status data, and determining a heating state of the inverter to be identified according to the heat sink temperature data; When the heating state meets the preset over-temperature condition, the inverter to be identified is in the over-temperature derating state; when the heating state does not meet the preset over-temperature condition, if the power limiting data in the operating state data meets the preset limiting condition, the inverter to be identified is in the power limiting derating state; If the power limit data in the operating status data does not meet the preset limiting conditions, determining the load state according to the numerical relationship between the active power data in the operating status data and the rated power of the inverter to be identified; When the active power data and the rated power of the inverter to be identified meet a preset overload condition, the inverter to be identified is in an overload derating state.

3. The inverter operating status identification method according to claim 2, characterized in that: If the power-limiting data in the operating status data meets a preset limiting condition, the inverter to be identified is in a power-limiting and derated state, including: First, determine whether there is a power-limited and derated grid-connected telesignaling value from the operating status data; if the operating status data includes a power-limited and derated grid-connected telesignaling value, and the power-limited and derated grid-connected telesignaling value is a power-limited state value, then the inverter to be identified is in a power-limited and derated state; If the operating status data does not include the power restriction and derated grid-connected remote signaling value, then counting the number of derated devices of the inverters in the derated operating state in the photovoltaic power station at the current moment; If the ratio of the number of the derating devices to the total number of all inverters in the photovoltaic power station is greater than a preset ratio threshold, the inverter to be identified is in a power-limited derating state.

4. The inverter operating status identification method according to claim 1, characterized in that: The step of obtaining the operating status data of the inverter to be identified includes: Acquire the real-time power telemetry value, radiator temperature telemetry value, instantaneous irradiation telemetry value, and derating grid-connected telesignaling value of the inverter of the photovoltaic power station within the target time window as the real-time operating parameters of the inverter to be identified; Acquire the rated power and installed capacity of the inverter to be identified as static configuration parameters of the inverter to be identified; Perform abnormal value processing on the real-time operating parameters and the static configuration parameters to obtain initial operating state data; the abnormal values ​​are null values ​​and / or zero values ​​and / or negative values; If the total number of real-time power telemetry values ​​in the initial operating status data is less than the original total number of real-time power telemetry values ​​corresponding to the target time window, then the operating status of the inverter to be identified is not identified; If the total number of real-time power telemetry values ​​in the initial operating status data is greater than or equal to the original total number of real-time power telemetry values ​​corresponding to the target time window, the real-time power telemetry values ​​of different inverters are normalized according to the installed capacity to obtain the operating status data of the inverter to be identified.

5. The inverter operating status identification method according to any one of claims 1 to 4, characterized in that: Matching the operating state data with a derated state power characteristic includes: Obtaining a first real-time power telemetry value at a first collection moment and a second real-time power telemetry value at a second collection moment, and calculating a power difference between the first real-time power telemetry value and the second real-time power telemetry value; the second collection moment being a moment subsequent to the first collection moment; If the power difference is greater than the product of the real-time power telemetry value at the moment before the first collection moment and the preset adjustment factor, and the standard deviation of the real-time power telemetry values ​​collected between the first collection moment and the third collection moment is less than a first preset difference threshold, then the inverter to be identified is in a derated operation state; If the power difference is greater than the product of the real-time power telemetry value at the next moment after the second collection moment and the preset adjustment factor, and the standard deviation of the real-time power telemetry values ​​collected between the fourth collection moment and the first collection moment is less than the first preset difference threshold, then the inverter to be identified is in a derated operation state; Among them, the preset adjustment factor is 20%±Δ1, Δ1 is the fluctuation value; the third collection moment is located after the first collection moment, and the time duration from the first collection moment to the third collection moment is the same as the single collection duration of the operating status data; the fourth collection moment is located before the first collection moment, and the time duration from the fourth collection moment to the first collection moment is the same as the single collection duration of the operating status data.

6. The inverter operating status identification method according to any one of claims 1 to 4, characterized in that: Matching the operating state data with a derated state power characteristic includes: If the standard deviation of each real-time power telemetry value in the single-collected operating status data is less than the second preset difference threshold, and the real-time power telemetry value at the current moment is less than the maximum active power value of the day, then the inverter to be identified is in a derated operating state; The second preset difference threshold is smaller than the first preset difference threshold.

7. The inverter operating status identification method according to any one of claims 1 to 4, characterized in that: Matching the operating state data with a derated state power characteristic includes: Calculating a difference coefficient between an instantaneous irradiance telemetry value and a real-time power telemetry value at each acquisition moment in the operating status data; if each difference coefficient in the operating status data acquired at a single time is greater than a third preset difference threshold, then the inverter to be identified is in a derated operating state; or, Calculating a difference coefficient between a standard real-time power telemetry value of the model machine and a real-time power telemetry value at each acquisition moment in the operating status data; if each difference coefficient in the operating status data acquired at a single time is greater than a third preset difference threshold, the inverter to be identified is in a derated operating state; The third preset difference threshold is greater than the second preset difference threshold and less than the first preset difference threshold.

8. An electronic device, characterized in that: The device comprises a processor and a memory, wherein the processor is configured to implement the steps of the inverter operating state identification method according to any one of claims 1 to 7 when executing a computer program stored in the memory.

9. A non-volatile storage medium, characterized in that: The non-volatile storage medium stores a computer program, and when the computer program is executed by the processor, the steps of the inverter operating status identification method according to any one of claims 1 to 7 are implemented.

10. A photovoltaic power station, characterized in that: The invention comprises an inverter and a processor, wherein the processor is connected to the inverter; when the processor is executed, the steps of the inverter operation status identification method according to any one of claims 1 to 7 are implemented.

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