Fault loss power determination method, device, system and storage medium

Abstract

The application discloses a kind of fault loss electric quantity determination method, device, system and storage medium, the method includes: obtaining the equivalent utilization hours of each inverter of historical daily in power station and historical daily weather data;According to the historical daily weather data and the equivalent utilization hours, the inverter is clustered, and the inverter grouping set is determined;Current fault information of the power station is obtained, and the fault loss electric quantity of the power station is determined based on the current fault information and the inverter grouping set.The application is clustered according to historical daily weather data and the equivalent utilization hours of each inverter of historical daily in power station, and the inverter grouping set is determined, and the fault loss electric quantity of any equipment failure in power station can be calculated by selecting corresponding equivalent utilization hours in inverter grouping set, to determine the fault loss electric quantity of power station, without specifying template machine, to reduce the fault loss electric quantity calculation error.

Description

Technical Field

[0001] This invention relates to the field of new energy technology, and in particular to a method, apparatus, system and storage medium for determining power loss due to faults. Background Technology

[0002] Fault-induced power loss is a crucial indicator for evaluating the quality of photovoltaic power plant operation and maintenance. Currently, fault-induced power loss is generally calculated using a sample machine method. However, since sample machines are manually designated and limited in number, there may be no similarity between the sample machine and the faulty equipment. When the similarity between the sample machine and the faulty equipment is small, the calculated fault-induced power loss has a significant error. Therefore, reducing the calculation error of fault-induced power loss is an urgent problem to be solved. Summary of the Invention

[0003] The main objective of this invention is to provide a method, apparatus, system, and storage medium for determining fault-related power loss, aiming to solve the problem of reducing errors in fault-related power loss calculation.

[0004] To achieve the above objectives, the present invention provides a method for determining power loss due to a fault, the method comprising the following steps:

[0005] Obtain the equivalent utilization hours of each inverter in the power plant for each historical day and historical daily weather data;

[0006] The inverters are clustered based on the historical daily weather data and the equivalent utilization hours to determine the inverter group set.

[0007] Obtain the current fault information of the power station, and determine the fault power loss of the power station based on the current fault information and the inverter group set.

[0008] Optionally, the step of clustering the inverters based on the historical daily weather data and the equivalent utilization hours to determine the inverter group set includes:

[0009] Based on the preset grouping time period and the historical daily weather data, the historical dates corresponding to the power station are grouped to obtain a set of historical date groups;

[0010] The inverters are clustered based on the historical date grouping set and the equivalent utilization hours to determine the inverter grouping set.

[0011] Optionally, the step of clustering the inverters according to the historical date grouping set and the equivalent utilization hours to determine the inverter grouping set includes:

[0012] Select one historical date group from the set of historical date groups in turn;

[0013] The inverters are clustered according to the equivalent utilization hours corresponding to each historical date in the selected historical date group to determine the inverter pre-grouping corresponding to each historical date;

[0014] The inverter grouping corresponding to the selected historical date group is determined based on the inverter pre-grouping corresponding to each historical date.

[0015] The process continues until the inverter group corresponding to each historical date group in the historical date group set is determined, and then the inverter group set is determined based on the inverter group corresponding to each historical date group.

[0016] Optionally, the step of determining the inverter group corresponding to the selected historical date group based on the inverter pre-grouping corresponding to each historical date includes:

[0017] The grouping type of the inverter pregroups corresponding to each historical date in the selected historical date grouping is counted, and the number of inverter pregroups contained in each grouping type is compared to obtain the comparison results;

[0018] Based on the comparison results, the inverter pregroup corresponding to the group type with the largest number of inverter pregroups is selected as the inverter group corresponding to the historical date group.

[0019] Optionally, the step of determining the fault-related power loss of the power station based on the current fault information and the inverter group set includes:

[0020] Determine whether the current fault information is an inverter fault;

[0021] If so, determine the inverter set corresponding to the current fault information, and determine the fault power loss of the power station based on the inverter set and the inverter group set;

[0022] If not, then determine the set of faulty devices corresponding to the current fault information, map the set of faulty devices to the set of inverters, and determine the fault power loss of the power station based on the set of inverters and the set of inverter groups.

[0023] Optionally, the step of mapping the set of faulty devices to the set of inverters includes:

[0024] Obtain the preset equipment hierarchy relationship of the power station, and determine the equipment hierarchy of each faulty device in the faulty equipment set;

[0025] The inverter corresponding to each faulty device is determined based on the device level of each faulty device and the preset device level relationship;

[0026] Based on the hierarchical relationship, each faulty device is mapped to its corresponding inverter, resulting in an inverter set.

[0027] Optionally, the step of determining the fault loss power of the power station based on the inverter set and the inverter group set includes:

[0028] Determine the current date and select an inverter from the inverter set in sequence;

[0029] The target inverter group is determined from the inverter group set based on the current date and the selected inverter;

[0030] Calculate the benchmark equivalent utilization hours corresponding to the target inverter group, and obtain the installed capacity and actual equivalent utilization hours of the selected inverter;

[0031] The fault loss power of the selected inverter is determined based on the benchmark equivalent utilization hours, the installed capacity, and the actual equivalent utilization hours.

[0032] The power loss due to fault is determined for each inverter in the inverter set, and the power loss due to fault is determined for the power station based on the power loss due to fault of each inverter.

[0033] Optionally, the step of calculating the benchmark equivalent utilization hours corresponding to the target inverter group includes:

[0034] Obtain the equivalent utilization hours of each inverter in the target inverter group other than the selected inverter, and calculate the median or average of the equivalent utilization hours of each inverter other than the selected inverter. Use the median or average as the benchmark equivalent utilization hours of the target inverter group.

[0035] Optionally, the step of determining the fault loss power of the power station based on the fault loss power of each inverter includes:

[0036] The power loss due to the fault of each inverter is added together to obtain the power loss due to the fault of the power station.

[0037] Furthermore, to achieve the above objectives, the present invention also provides a fault power loss determination device, the fault power loss determination device comprising:

[0038] The acquisition module is used to acquire the equivalent utilization hours of each inverter in the power plant on a historical daily basis and historical daily weather data.

[0039] The clustering module is used to cluster the inverters based on the historical daily weather data and the equivalent utilization hours to determine the inverter group set;

[0040] The determination module is used to obtain the current fault information of the power station and determine the fault power loss of the power station based on the current fault information and the inverter group set.

[0041] Furthermore, the clustering module is also used for:

[0042] Based on the preset grouping time period and the historical daily weather data, the historical dates corresponding to the power station are grouped to obtain a set of historical date groups;

[0043] The inverters are clustered based on the historical date grouping set and the equivalent utilization hours to determine the inverter grouping set.

[0044] Furthermore, the clustering module is also used for:

[0045] Select one historical date group from the set of historical date groups in turn;

[0046] The inverters are clustered according to the equivalent utilization hours corresponding to each historical date in the selected historical date group to determine the inverter pre-grouping corresponding to each historical date;

[0047] The inverter grouping corresponding to the selected historical date group is determined based on the inverter pre-grouping corresponding to each historical date.

[0048] The process continues until the inverter group corresponding to each historical date group in the historical date group set is determined, and then the inverter group set is determined based on the inverter group corresponding to each historical date group.

[0049] Furthermore, the clustering module is also used for:

[0050] The grouping type of the inverter pregroups corresponding to each historical date in the selected historical date grouping is counted, and the number of inverter pregroups contained in each grouping type is compared to obtain the comparison results;

[0051] Based on the comparison results, the inverter pregroup corresponding to the group type with the largest number of inverter pregroups is selected as the inverter group corresponding to the historical date group.

[0052] Furthermore, the determining module is also used for:

[0053] Determine whether the current fault information is an inverter fault;

[0054] If so, determine the inverter set corresponding to the current fault information, and determine the fault power loss of the power station based on the inverter set and the inverter group set;

[0055] If not, then determine the set of faulty devices corresponding to the current fault information, map the set of faulty devices to the set of inverters, and determine the fault power loss of the power station based on the set of inverters and the set of inverter groups.

[0056] Furthermore, the determining module is also used for:

[0057] Obtain the preset equipment hierarchy relationship of the power station, and determine the equipment hierarchy of each faulty device in the faulty equipment set;

[0058] The inverter corresponding to each faulty device is determined based on the device level of each faulty device and the preset device level relationship;

[0059] Based on the hierarchical relationship, each faulty device is mapped to its corresponding inverter, resulting in an inverter set.

[0060] Furthermore, the determining module is also used for:

[0061] Determine the current date and select an inverter from the inverter set in sequence;

[0062] The target inverter group is determined from the inverter group set based on the current date and the selected inverter;

[0063] Calculate the benchmark equivalent utilization hours corresponding to the target inverter group, and obtain the installed capacity and actual equivalent utilization hours of the selected inverter;

[0064] The fault loss power of the selected inverter is determined based on the benchmark equivalent utilization hours, the installed capacity, and the actual equivalent utilization hours.

[0065] The power loss due to fault is determined for each inverter in the inverter set, and the power loss due to fault is determined for the power station based on the power loss due to fault of each inverter.

[0066] Furthermore, the determining module is also used for:

[0067] Obtain the equivalent utilization hours of each inverter in the target inverter group other than the selected inverter, and calculate the median or average of the equivalent utilization hours of each inverter other than the selected inverter. Use the median or average as the benchmark equivalent utilization hours of the target inverter group.

[0068] Furthermore, the determining module is also used for:

[0069] The power loss due to the fault of each inverter is added together to obtain the power loss due to the fault of the power station.

[0070] In addition, to achieve the above objectives, the present invention also provides a fault power loss determination system, the fault power loss determination system comprising: a memory, a processor, and a fault power loss determination program stored in the memory and executable on the processor, wherein when the fault power loss determination program is executed by the processor, it implements the steps of the fault power loss determination method as described above.

[0071] In addition, to achieve the above objectives, the present invention also provides a storage medium storing a fault power loss determination program, which, when executed by a processor, implements the steps of the fault power loss determination method as described above.

[0072] The present invention proposes a method for determining fault-related power loss. This method involves acquiring the equivalent utilization hours of each inverter in a power plant for each historical day and historical daily weather data; clustering the inverters based on the historical daily weather data and the equivalent utilization hours to determine an inverter group set; acquiring the current fault information of the power plant; and determining the fault-related power loss of the power plant based on the current fault information and the inverter group set. This invention clusters the inverters based on historical daily weather data and the equivalent utilization hours of each inverter in the power plant for each historical day to determine the inverter group set. For any equipment fault in the power plant, the fault-related power loss can be calculated by selecting the corresponding equivalent utilization hours from the inverter group set, thereby determining the power plant's fault-related power loss. This eliminates the need to specify a prototype unit, thus reducing the error in calculating fault-related power loss. Attached Figure Description

[0073] Figure 1 This is a flowchart illustrating the first embodiment of the method for determining power loss due to faults according to the present invention.

[0074] Figure 2 This is a flowchart illustrating the second embodiment of the method for determining power loss due to faults according to the present invention.

[0075] Figure 3 This is a flowchart illustrating the third embodiment of the method for determining power loss due to faults according to the present invention.

[0076] Figure 4 This is a schematic diagram of the fault loss power determination device of the present invention.

[0077] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0078] Reference Figure 1 , Figure 1This is a flowchart illustrating the first embodiment of the fault loss power determination method of the present invention. This embodiment applies the fault loss power determination method to a fault loss power determination system for a photovoltaic power station. The fault loss power determination system can be applied to devices such as PCs and smart terminals. For ease of description, the fault loss power determination system is used as an example. The method includes:

[0079] Step S10: Obtain the equivalent utilization hours of each inverter in the power station for each historical day and the historical daily weather data;

[0080] In this embodiment, before calculating the fault loss power of the photovoltaic power station, the fault loss power determination system acquires the historical data of the power station. The historical data includes the equivalent utilization hours of each inverter for each day and the historical weather data for each day. It should be noted that the equivalent utilization hours = the power generation of the inverter / the DC side installed capacity of the inverter; the historical weather data includes the solar altitude angle, temperature, cloudy days, sunny days, etc.

[0081] Step S20: Cluster the inverters according to the historical daily weather data and the equivalent utilization hours to determine the inverter group set;

[0082] In this embodiment, the fault loss power determination system clusters all inverters in the power station based on historical daily weather data and equivalent utilization hours to obtain inverter group sets.

[0083] Specifically, step S20 includes:

[0084] Step S201: Based on the preset grouping time period and the historical daily weather data, group the historical dates corresponding to the power station to obtain a historical date grouping set;

[0085] In this step, the fault loss power determination system determines the historical daily tilt surface radiation of the power station based on historical daily weather data, and groups the historical dates corresponding to the power station according to the preset grouping time period and the historical daily tilt surface radiation, to obtain a set of historical date groups. It can be understood that the preset grouping time period can be a month, quarter, etc., that is, the dates in each month in the history of the power station can be grouped according to their historical daily tilt surface radiation, or the dates in each quarter in the history of the power station can be grouped according to their historical daily tilt surface radiation, etc.

[0086] Preferably, the preset grouping time period is monthly, that is, the dates within each month in the history of the power station are grouped according to their historical daily tilt surface radiation. The fault loss power determination system has acquired two years of historical data of the power station. Taking January as an example, January has 62 days of data. Among the 62 days, there are 10 days with tilt surface radiation greater than or equal to 6 kWh / m², 30 days with tilt surface radiation between 4 and 6 kWh / m², 20 days with tilt surface radiation between 2 and 4 kWh / m², and 2 days with tilt surface radiation less than 2 kWh / m². Thus, the 62 days can be divided into 4 groups. That is, the days with tilt surface radiation greater than or equal to 6 kWh / m² are grouped into one group, the days with tilt surface radiation between 4 and 6 kWh / m² are grouped into another group, the days with tilt surface radiation between 2 and 4 kWh / m² are grouped into another group, and the days with tilt surface radiation less than 2 kWh / m² are grouped into another group. For dates in other months, the same grouping method is used, which will not be repeated here; the specific values ​​of the inclined surface radiation used for grouping can be determined according to the actual situation, and are not limited here.

[0087] It should be noted that the division by month is because shading has a time-dependent characteristic, and the shading situation in the same month can be considered similar. At the same time, the solar altitude angle and temperature also have time-dependent characteristics. Under the same tilt surface irradiance, the solar altitude angle and temperature determine the inverter's maximum output. For inverters with a high capacity ratio, the maximum output will affect the equivalent utilization hours. The division by tilt surface radiation is because the same shading will have different effects on the power generation of the modules under different radiation levels. The impact is greater on sunny days and less on cloudy days. At the same time, the radiation level will also affect the inverter's maximum output.

[0088] Under the same tilt irradiance, the solar altitude angle and temperature determine the inverter's maximum output. For inverters with a high capacity ratio, the maximum output affects the equivalent utilization hours. Specifically, the inverter's equivalent utilization hours are mainly related to the tilt irradiance of the day. If the maximum tilt irradiance of the day allows the inverter to operate at full power, then increasing the irradiance beyond the maximum tilt irradiance will increase the tilt irradiance, but since the inverter has already reached full power, its power will not increase, and the inverter's equivalent utilization hours for the day will not increase either. This demonstrates that... Under certain conditions, the equivalent utilization hours of an inverter are related not only to the amount of irradiance on the tilted surface, but also to whether the inverter reaches full power operation. Obviously, the higher the capacity ratio (in layman's terms, the more components connected to the same model of inverter), the higher the maximum tilted surface irradiance, and the easier it is for the inverter to reach full power operation. Assuming that under a certain maximum tilted surface irradiance, the inverter with a high capacity ratio reaches full power operation, while the inverter with a low capacity ratio does not reach full power operation, then under the same amount of irradiance on the tilted surface, the equivalent utilization hours of the inverter with a low capacity ratio will be higher than those of the inverter with a high capacity ratio.

[0089] Step S202: Cluster the inverters according to the historical date grouping set and the equivalent utilization hours to determine the inverter grouping set.

[0090] In this step, the fault loss power determination system acquires historical data corresponding to each historical date within each historical date group in the historical date set. Based on the equivalent utilization hours of each inverter in the power station recorded in the historical data, the system clusters the inverters for each historical date, determining the inverter group corresponding to each historical date group. Finally, it determines the inverter group set based on the inverter groups corresponding to each historical date group. It should be noted that the historical data for each historical date records the equivalent utilization hours of each inverter in the power station for that historical date.

[0091] Step S30: Obtain the current fault information of the power station, and determine the fault power loss of the power station based on the current fault information and the inverter group set.

[0092] In this embodiment, after determining the inverter group set, the fault loss power determination system obtains the current fault information of the power station when it detects a fault in the power station, and determines the fault loss power of the power station based on the current fault information and the inverter group set.

[0093] Specifically, step S30 includes:

[0094] Step S301: Determine whether the current fault information is an inverter fault;

[0095] In this step, after obtaining the current fault information of the power station, the fault loss power determination system identifies the faulty equipment based on the current fault information, and then determines whether the faulty equipment is the inverter, and further determines whether the current fault information indicates an inverter fault.

[0096] Step S302: If yes, then determine the inverter set corresponding to the current fault information, and determine the fault power loss of the power station based on the inverter set and the inverter group set;

[0097] Step S303: If not, determine the set of faulty devices corresponding to the current fault information, map the set of faulty devices to the set of inverters, and determine the fault power loss of the power station based on the set of inverters and the set of inverter groups.

[0098] In steps S302 to S303, if the fault loss power determination system determines that the current fault information is an inverter fault, it determines the inverter set corresponding to the current fault information and determines the power loss of the power station based on the inverter set and the inverter group set; if the fault loss power determination system determines that the current fault information is not an inverter fault, it determines the fault equipment set corresponding to the current fault information, maps the fault equipment set to the inverter set, and determines the power loss of the power station based on the inverter set and the inverter group set; further, determining the power loss of the power station based on the inverter set and the inverter group set specifically involves: sequentially selecting an inverter from the inverter set, and determining the power loss based on the selected inverter and the current day corresponding to the current fault information. In this process, the inverter group corresponding to the selected inverter is determined from the inverter group set, and the benchmark equivalent utilization hours corresponding to the inverter group are determined. The installed capacity of the selected inverter and the actual equivalent utilization hours of the selected inverter on the current date are obtained. Based on the benchmark equivalent utilization hours corresponding to the inverter group, the installed capacity of the selected inverter, and the actual equivalent utilization hours of the selected inverter on the current date, the fault loss power of the selected inverter on the current date is determined. The above process is performed for each inverter in the inverter set to determine the fault loss power of each inverter in the inverter set on the current date. The fault loss power of each inverter on the current date is added together to obtain the fault loss power of the power station on the current date.

[0099] Furthermore, the step of mapping the set of faulty devices to the set of inverters includes:

[0100] Step S3031: Obtain the preset equipment hierarchy relationship of the power station and determine the equipment hierarchy of each faulty device in the faulty equipment set;

[0101] Step S3032: Determine the inverter corresponding to each faulty device based on the device level of each faulty device and the preset device level relationship;

[0102] Step S3033: Based on the hierarchical relationship, map each faulty device to the corresponding inverter to obtain an inverter set.

[0103] In steps S3031 to S3033, the fault loss power determination system obtains the preset equipment hierarchy relationship of the power station and determines the equipment hierarchy of each faulty device in the faulty device set; based on the equipment hierarchy of each faulty device and the preset equipment hierarchy relationship, it determines the inverter corresponding to each faulty device; based on the hierarchy relationship, it maps each faulty device to the corresponding inverter to obtain the inverter set. It's understandable that mapping faulty non-inverter equipment to the faulty inverter is primarily because inverter data is easier and more reliable to obtain. Calculating power loss mainly requires data on power generation and installed capacity, both of which are relatively easy and reliable for inverters. Upper-level inverter equipment (such as transformer substations and collector lines) either lacks power metering devices or has devices where data acquisition is difficult (due to communication debugging issues). Lower-level inverter equipment (such as combiner boxes and strings) lacks power metering devices and can only perform rough calculations using voltage and current data, resulting in significantly larger errors compared to devices with metering capabilities. Furthermore, the installed capacity of lower-level inverter equipment is difficult to quantify due to its vast number and frequent changes in capacity (the installation location of strings is often altered during on-site fault handling). In contrast, inverter capacity is much more stable.

[0104] For example, if the faulty device is transformer No. 1, based on the equipment hierarchy of transformer No. 1 and the preset equipment hierarchy relationship of the power station, transformer No. 1 is determined to be the upper-level device of the inverter, and there are two inverters (inverter 1-1 and inverter 1-2) connected to the lower level of transformer No. 1. Then transformer No. 1 is mapped to inverter 1-1 and inverter 1-2. If the faulty device is combiner box 1-8, based on the equipment hierarchy of combiner box 1-8 and the preset equipment hierarchy relationship of the power station, combiner box 1-8 is determined to be the lower-level device of the inverter, and combiner box 1-8 is connected to inverter 1-2. Then combiner box 1-8 is mapped to inverter 1-2.

[0105] The fault loss power determination system in this embodiment acquires the equivalent utilization hours of each inverter in the power plant for each historical day and historical daily weather data; it clusters the inverters based on the historical daily weather data and equivalent utilization hours to determine the inverter group set; it acquires the current fault information of the power plant, and determines the fault loss power of the power plant based on the current fault information and the inverter group set. This invention clusters the inverters based on historical daily weather data and the equivalent utilization hours of each inverter in the power plant for each historical day to determine the inverter group set. Any equipment failure in the power plant can be calculated by selecting the corresponding equivalent utilization hours from the inverter group set, thereby determining the fault loss power of the power plant. This eliminates the need to specify a prototype unit, thus reducing the error in calculating fault loss power.

[0106] Further, refer to Figure 2The second embodiment of the present invention is proposed. The difference between the second embodiment and the first embodiment is that the step of clustering the inverters according to the historical date grouping set and the equivalent utilization hours to determine the inverter grouping set includes:

[0107] Step S2021: Select a historical date group from the historical date grouping set in sequence;

[0108] Step S2022: Cluster the inverters according to the equivalent utilization hours corresponding to each historical date in the selected historical date group to determine the inverter pre-grouping corresponding to each historical date;

[0109] In steps S2021 and S2022, the fault loss power determination system sequentially selects a historical date group from the historical date grouping set. Based on the equivalent utilization hours of each inverter in the power station for each historical date within the selected historical date group, it clusters all inverters to determine the pre-grouping of inverters corresponding to each historical date. It should be noted that clustering all inverters means grouping inverters with the same or approximately the same equivalent utilization hours into one group. The term "approximately the same" is not limited here and can be set according to specific circumstances.

[0110] For example, the preset grouping time period is monthly. That is, the fault loss power determination system groups the dates in each month of the power station's history according to its historical daily tilt surface radiation. Taking January as an example, the historical date grouping set for January includes: Group 1: 1, 3, 5, 7, 9, 11; Group 2: 2, 4, 6, 8, 10, 12; Group 3: 13, 15, 17, 19, 21, 23, 25, 27, 29, 31; Group 4: 14, 16, 18, 20, 22, 24, 26, 28, 30, where the numbers represent the dates. The fault loss power determination system sequentially selects a historical date group from the historical date grouping set. Assuming the first group is selected, the system obtains the equivalent utilization hours for each inverter in the power station on day 1. Inverters with the same or approximately the same equivalent utilization hours are clustered together. Assuming there are ten inverters in the power station, numbered 1-10, and inverters 1-5 and 6-10 have the same or approximately the same equivalent utilization hours, inverters 1-5 are clustered into one pre-group, and inverters 6-10 are clustered into another pre-group. The same steps are performed for other dates to determine the pre-group of inverters corresponding to each historical date in the selected historical date group.

[0111] Step S2023: Determine the inverter group corresponding to the selected historical date group based on the inverter pre-grouping corresponding to each historical date;

[0112] In this step, after the fault loss power determination system determines the inverter pre-grouping corresponding to each historical date of the selected historical date group, it determines the inverter grouping corresponding to the selected historical date group based on the inverter pre-grouping corresponding to each historical date.

[0113] Specifically, step S2023 includes:

[0114] Step S20231: Count the grouping type of inverter pregroups corresponding to each historical date in the selected historical date group, and compare the number of inverter pregroups contained in each grouping type to obtain the comparison results;

[0115] Step S20232: Based on the comparison results, the inverter pregroup corresponding to the group type with the largest number of inverter pregroups is selected as the inverter group corresponding to the historical date group.

[0116] In steps S20231 to S20232, the fault loss power determination system statistically selects the inverter pre-grouping type corresponding to each historical date in the selected historical date grouping, and compares the number of inverter pre-groupings contained in each grouping type to obtain the comparison result; based on the comparison result, the inverter pre-grouping corresponding to the grouping type containing the most inverter pre-groupings is taken as the inverter grouping corresponding to the selected historical date grouping.

[0117] For example, continuing the above example, assuming that in the first group, the inverter pre-grouping for the 1st, 3rd, 5th, and 7th is as follows: inverters 1-5 are clustered into one inverter pre-group, and inverters 6-10 are clustered into another inverter pre-group; the inverter pre-grouping for the 9th is: inverters 1-3 are clustered into one inverter pre-group, and inverters 4-10 are clustered into another inverter pre-group; the inverter pre-grouping for the 11th is: inverters 1-8 are clustered into one inverter pre-group, and inverters 9-10 are clustered into another inverter pre-group; in the historical date grouping selected by the fault loss power determination system statistics... There are three types of inverter pre-grouping for each historical date. The first type contains 4 inverter pre-groups, while the second and third types each contain 1 inverter pre-group. The fault loss power determination system compares the number of inverter pre-groups in each grouping type and determines that the inverter pre-groups corresponding to the first type are used as the inverter groups corresponding to the selected historical date groups. That is, the inverter groups corresponding to the selected historical date groups are: inverters 1-5 are clustered into one inverter group, and inverters 6-10 are clustered into another inverter group.

[0118] Step S2024: Until the inverter group corresponding to each historical date group in the historical date group set is determined, determine the inverter group set based on the inverter group corresponding to each historical date group.

[0119] In this step, the fault loss power determination system performs the above steps for each historical date group in the historical date group set until the inverter group corresponding to each historical date group in the historical date group set is determined, and the inverter group set is determined based on the inverter group corresponding to each historical date group.

[0120] The fault loss power determination system in this embodiment sequentially selects a historical date group from the historical date grouping set; clusters the inverters according to the equivalent utilization hours corresponding to each historical date in the selected historical date group, and determines the inverter pre-grouping corresponding to each historical date; determines the inverter grouping corresponding to the selected historical date group based on the inverter pre-grouping corresponding to each historical date; and so on until the inverter grouping corresponding to each historical date group in the historical date grouping set is determined, and determines the inverter grouping set based on the inverter grouping corresponding to each historical date group. By grouping the inverters, it is convenient to calculate the fault loss power by selecting the corresponding equivalent utilization hours in the inverter grouping set for any equipment failure in the subsequent power plant, thereby determining the power plant's fault loss power, without the need to specify a prototype machine, thus reducing the error in fault loss power calculation.

[0121] Further, refer to Figure 3The present invention proposes a third embodiment, which differs from the first and second embodiments in that the step of determining the fault loss power of the power station based on the inverter set and the inverter group set includes:

[0122] Step S3031: Determine the current date and select an inverter from the inverter set in sequence;

[0123] Step S3032: Determine the target inverter group in the inverter group set according to the current date and the selected inverter;

[0124] In steps S3031 to S3032, the fault loss power determination system determines the current date and selects an inverter from the inverter set corresponding to the current fault information of the power station in sequence. Based on the current date and the selected inverter, the system determines the target inverter group in the inverter group set.

[0125] Specifically, data such as the month, quarter, weather, and tilt surface radiation corresponding to the current date are obtained. The historical date group corresponding to the current date is determined from the historical date grouping set. Then, based on the historical date group corresponding to the current date and the selected inverter, the target inverter group is determined from the inverter grouping set. For example, assuming the inverter grouping in the power plant's inverter grouping set for the current date is as follows: inverters 1-5 are clustered into one inverter group, and inverters 6-10 are clustered into another inverter group; assuming the selected inverter number is 1, then the inverter group for inverters 1-5 is determined as the target inverter group corresponding to the selected inverter.

[0126] Step S3033: Calculate the benchmark equivalent utilization hours corresponding to the target inverter group, and obtain the installed capacity and actual equivalent utilization hours of the selected inverter;

[0127] In this step, the fault loss power determination system calculates the benchmark equivalent utilization hours corresponding to the target inverter group and obtains the installed capacity and actual equivalent utilization hours of the selected inverter.

[0128] Specifically, step S3033 includes:

[0129] Step S30331: Obtain the equivalent utilization hours of each inverter in the target inverter group other than the selected inverter, and calculate the median or average of the equivalent utilization hours of each inverter other than the selected inverter, and use the median or average as the benchmark equivalent utilization hours of the target inverter group.

[0130] In this step, the fault loss power determination system obtains the equivalent utilization hours of each inverter in the target inverter group except for the selected inverter, and calculates the median or average of the equivalent utilization hours of each inverter except for the selected inverter. The median or average is then used as the benchmark equivalent utilization hours of the target inverter group.

[0131] For example, the inverter group of inverters 1-5 is the target inverter group corresponding to the selected inverter. The selected inverter is numbered 1. The fault loss power determination system determines the median or average based on the equivalent utilization hours of inverters 2-5, and uses the median or average as the benchmark equivalent utilization hours corresponding to the target inverter group.

[0132] Step S3034: Determine the fault loss power of the selected inverter based on the benchmark equivalent utilization hours, the installed capacity, and the actual equivalent utilization hours;

[0133] In this step, the fault loss power determination system determines the fault loss power of the selected inverter based on the benchmark equivalent utilization hours, installed capacity, and actual equivalent utilization hours; specifically, the fault loss power of the inverter = the installed capacity of the inverter × (the benchmark equivalent utilization hours of the inverter's group - the actual equivalent utilization hours of the inverter).

[0134] Step S3035, until the fault loss power of each inverter in the inverter set is determined, and the fault loss power of the power station is determined based on the fault loss power of each inverter.

[0135] Specifically, step S3035 includes:

[0136] Step S30351: The fault loss power of each inverter is added together to obtain the fault loss power of the power station.

[0137] In this step, the fault loss power determination system performs the above steps on each inverter in the inverter set to determine the fault loss power of each inverter, and then adds up the fault loss power of each inverter to obtain the fault loss power of the power station.

[0138] The fault loss power determination system in this embodiment determines the current date and sequentially selects an inverter from the inverter set; based on the current date and the selected inverter, it determines the target inverter group from the inverter group set; it calculates the benchmark equivalent utilization hours corresponding to the target inverter group and obtains the installed capacity and actual equivalent utilization hours of the selected inverter; based on the benchmark equivalent utilization hours, installed capacity, and actual equivalent utilization hours, it determines the fault loss power of the selected inverter; this process continues until the fault loss power of each inverter in the inverter set is determined, and the fault loss power of the power station is determined based on the fault loss power of each inverter. By selecting the corresponding equivalent utilization hours from the inverter group set to calculate the fault loss power, and thus determining the fault loss power of the power station, it is not necessary to specify a prototype inverter, thereby reducing the error in the fault loss power calculation.

[0139] like Figure 4 As shown, the present invention also provides a device for determining power loss due to faults. The device for determining power loss due to faults of the present invention includes:

[0140] The acquisition module 101 is used to acquire the equivalent utilization hours of each inverter in the power station on a historical daily basis and historical daily weather data.

[0141] Clustering module 102 is used to cluster the inverters based on the historical daily weather data and the equivalent utilization hours to determine the inverter group set;

[0142] The determination module 103 is used to obtain the current fault information of the power station and determine the fault power loss of the power station based on the current fault information and the inverter group set.

[0143] Furthermore, the clustering module is also used for:

[0144] Based on the preset grouping time period and the historical daily weather data, the historical dates corresponding to the power station are grouped to obtain a set of historical date groups;

[0145] The inverters are clustered based on the historical date grouping set and the equivalent utilization hours to determine the inverter grouping set.

[0146] Furthermore, the clustering module is also used for:

[0147] Select one historical date group from the set of historical date groups in turn;

[0148] The inverters are clustered according to the equivalent utilization hours corresponding to each historical date in the selected historical date group to determine the inverter pre-grouping corresponding to each historical date;

[0149] The inverter grouping corresponding to the selected historical date group is determined based on the inverter pre-grouping corresponding to each historical date.

[0150] The process continues until the inverter group corresponding to each historical date group in the historical date group set is determined, and then the inverter group set is determined based on the inverter group corresponding to each historical date group.

[0151] Furthermore, the clustering module is also used for:

[0152] The grouping type of the inverter pregroups corresponding to each historical date in the selected historical date grouping is counted, and the number of inverter pregroups contained in each grouping type is compared to obtain the comparison results;

[0153] Based on the comparison results, the inverter pregroup corresponding to the group type with the largest number of inverter pregroups is selected as the inverter group corresponding to the historical date group.

[0154] Furthermore, the determining module is also used for:

[0155] Determine whether the current fault information is an inverter fault;

[0156] If so, determine the inverter set corresponding to the current fault information, and determine the fault power loss of the power station based on the inverter set and the inverter group set;

[0157] If not, then determine the set of faulty devices corresponding to the current fault information, map the set of faulty devices to the set of inverters, and determine the fault power loss of the power station based on the set of inverters and the set of inverter groups.

[0158] Furthermore, the determining module is also used for:

[0159] Obtain the preset equipment hierarchy relationship of the power station, and determine the equipment hierarchy of each faulty device in the faulty equipment set;

[0160] The inverter corresponding to each faulty device is determined based on the device level of each faulty device and the preset device level relationship;

[0161] Based on the hierarchical relationship, each faulty device is mapped to its corresponding inverter, resulting in an inverter set.

[0162] Furthermore, the determining module is also used for:

[0163] Determine the current date and select an inverter from the inverter set in sequence;

[0164] The target inverter group is determined from the inverter group set based on the current date and the selected inverter;

[0165] Calculate the benchmark equivalent utilization hours corresponding to the target inverter group, and obtain the installed capacity and actual equivalent utilization hours of the selected inverter;

[0166] The fault loss power of the selected inverter is determined based on the benchmark equivalent utilization hours, the installed capacity, and the actual equivalent utilization hours.

[0167] The power loss due to fault is determined for each inverter in the inverter set, and the power loss due to fault is determined for the power station based on the power loss due to fault of each inverter.

[0168] Furthermore, the determining module is also used for:

[0169] Obtain the equivalent utilization hours of each inverter in the target inverter group other than the selected inverter, and calculate the median or average of the equivalent utilization hours of each inverter other than the selected inverter. Use the median or average as the benchmark equivalent utilization hours of the target inverter group.

[0170] Furthermore, the determining module is also used for:

[0171] The power loss due to the fault of each inverter is added together to obtain the power loss due to the fault of the power station.

[0172] The present invention also provides a system for determining power loss due to faults.

[0173] The fault power loss determination system includes: a memory, a processor, and a fault power loss determination program stored in the memory and executable on the processor. When the fault power loss determination program is executed by the processor, it implements the steps of the fault power loss determination method as described above.

[0174] The method implemented when the fault loss power determination program running on the processor is executed can be referred to in various embodiments of the fault loss power determination method of the present invention, and will not be repeated here.

[0175] The present invention also provides a storage medium.

[0176] The storage medium stores a fault power loss determination program, which, when executed by the processor, implements the steps of the fault power loss determination method as described above.

[0177] The method implemented when the fault loss power determination program running on the processor is executed can be referred to in various embodiments of the fault loss power determination method of the present invention, and will not be repeated here.

[0178] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0179] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0180] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0181] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for determining a fault loss energy, characterized by, The fault loss power determination method comprises the following steps: Obtain the equivalent utilization hours of each inverter in the power station on each historical day and historical daily weather data; Cluster the inverters according to the historical daily weather data and the equivalent utilization hours to determine a set of inverter groups; Obtain current fault information of the power station, and determine the fault loss power of the power station based on the current fault information and the set of inverter groups; The step of determining the fault loss power of the power station based on the current fault information and the set of inverter groups comprises: Determine a set of inverters corresponding to the current fault information; For each inverter in the set of inverters, determine a target inverter group according to the current date and the inverter in the set of inverter groups; Calculate the benchmark equivalent utilization hours corresponding to the target inverter group to determine the fault loss power of the inverter according to the benchmark equivalent utilization hours; Determine the fault loss power of the power station according to the fault loss power of each inverter in the set of inverters.

2. The fault loss energy determination method of claim 1, wherein, The step of clustering the inverters according to the historical daily weather data and the equivalent utilization hours to determine a set of inverter groups comprises: Group historical dates corresponding to the power station according to a preset grouping time period and the historical daily weather data to obtain a set of historical date groups; Cluster the inverters according to the set of historical date groups and the equivalent utilization hours to determine a set of inverter groups.

3. The fault loss energy determination method of claim 2 wherein, The step of clustering the inverters according to the set of historical date groups and the equivalent utilization hours to determine a set of inverter groups comprises: Select a historical date group in the set of historical date groups in sequence; Cluster the inverters according to the equivalent utilization hours corresponding to each historical date in the selected historical date group to determine an inverter pre-group corresponding to each historical date; Determine an inverter group corresponding to the selected historical date group based on the inverter pre-group corresponding to each historical date; Until the inverter group corresponding to each historical date group in the set of historical date groups is determined, determine the set of inverter groups based on the inverter group corresponding to each historical date group.

4. The fault loss energy determination method of claim 3 wherein, The step of determining an inverter group corresponding to the selected historical date group based on the inverter pre-group corresponding to each historical date comprises: Statistically analyze the grouping types of the inverter pre-groups corresponding to each historical date in the selected historical date group, and compare the number of inverter pre-groups contained in each grouping type to obtain a comparison result; Based on the comparison result, take the inverter pre-group corresponding to the grouping type with the largest number of contained inverter pre-groups as the inverter group corresponding to the selected historical date group.

5. The method of claim 1, wherein, The step of determining the fault loss power of the power station based on the current fault information and the set of inverter groups comprises: Determine whether the current fault information is an inverter fault; If yes, a set of inverters corresponding to the current fault information is determined, and a fault loss power of the power station is determined based on the set of inverters and the set of inverter groups. If no, a set of fault devices corresponding to the current fault information is determined, and the set of fault devices is mapped to a set of inverters, and a fault loss power of the power station is determined based on the set of inverters and the set of inverter groups.

6. The faulted energy loss determination method of claim 5 wherein, The step of mapping the set of fault devices to the set of inverters comprises: obtaining a preset device hierarchical relationship of the power station, and determining a device hierarchy of each fault device in the set of fault devices; determining an inverter corresponding to each fault device based on the device hierarchy of each fault device and the preset device hierarchical relationship; mapping each fault device to the corresponding inverter based on the hierarchical relationship to obtain the set of inverters.

7. The faulted energy loss determination method of claim 5 wherein, The step of determining the fault loss power of the power station based on the set of inverters and the set of inverter groups comprises: determining a current date, and selecting an inverter from the set of inverters in turn; determining a target inverter group in the set of inverter groups according to the current date and the selected inverter; calculating a benchmark equivalent utilization hour corresponding to the target inverter group, and obtaining an installed capacity and an actual equivalent utilization hour of the selected inverter; determining a fault loss power of the selected inverter according to the benchmark equivalent utilization hour, the installed capacity and the actual equivalent utilization hour; until the fault loss power of each inverter in the set of inverters is determined, determining the fault loss power of the power station according to the fault loss power of each inverter.

8. The faulted energy loss determination method of claim 7 wherein, The step of calculating the benchmark equivalent utilization hour corresponding to the target inverter group comprises: obtaining an equivalent utilization hour of each inverter in the target inverter group except the selected inverter, and calculating a median or an average of the equivalent utilization hours of each inverter except the selected inverter, taking the median or the average as the benchmark equivalent utilization hour corresponding to the target inverter group.

9. The faulted energy loss determination method of claim 7 wherein, The step of determining the fault loss power of the power station according to the fault loss power of each inverter comprises: adding the fault loss power of each inverter to obtain the fault loss power of the power station.

10. A failure loss power amount determination device characterized by comprising: The fault loss power determination device comprises: an obtaining module, configured to obtain an equivalent utilization hour of each inverter in each historical day of a power station and historical daily weather data; a clustering module, configured to cluster the inverters according to the historical daily weather data and the equivalent utilization hours to determine a set of inverter groups; a determination module, configured to obtain current fault information of the power station, and determine a fault loss power of the power station based on the current fault information and the set of inverter groups; The determination of the fault loss power of the power station based on the current fault information and the set of inverter groups comprises: determining a set of inverters corresponding to the current fault information; for each inverter in the set of inverters, determining a target inverter group in the set of inverter groups according to a current date and the inverter. calculate a benchmark equivalent utilization hour corresponding to the target inverter group, to determine a fault loss power of the inverter according to the benchmark equivalent utilization hour; determine a fault loss power of the power station according to the fault loss power of each inverter in the inverter set.

11. A faulted energy loss determination system, comprising: The fault loss power determination system comprises a memory, a processor, and a fault loss power determination program stored on the memory and executable on the processor, and the fault loss power determination program, when executed by the processor, implements the steps of the fault loss power determination method according to any one of claims 1 to 9.

12. A storage medium, characterized by The storage medium stores a fault loss power determination program, and the fault loss power determination program, when executed by the processor, implements the steps of the fault loss power determination method according to any one of claims 1 to 9.

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