Photovoltaic power station inspection system

Abstract

The invention discloses a photovoltaic power station inspection system, which relates to the field of photovoltaic technology, and analyzes fault data segments in fault diagnosis data of a plurality of pieces of power equipment and abnormal data segments of the plurality of pieces of power equipment through a fault analysis module. Based on fault types of different power devices and a plurality of power devices related to the fault types, corresponding backtracking analysis durations are calculated, a compression general control period and a plurality of compression time intervals are set for the different power devices on the basis of the backtracking analysis durations, and based on the different compression time intervals, compression is performed on the different power devices. According to the method, operation data of corresponding power equipment in a compression general control period is subjected to segmented compression, so that the compression granularity is accurately matched with the data granularity required by fault backtracking, and when a fault occurs, operation and maintenance personnel only need to retrieve and decompress the compressed operation data in a compression time interval corresponding to a fault type and associated equipment; therefore, decompression time consumption during analysis is greatly shortened, and meanwhile computing resource waste caused by unrelated data decompression is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic technology, and specifically to a photovoltaic power station inspection system. Background Art

[0002] A photovoltaic power station includes core power equipment such as photovoltaic modules, inverters, transformers, and busbar boxes. During the operation of these devices, a large amount of real-time monitoring data will be generated. Such data usually needs to be stored for at least 5 - 10 years to meet the requirements of equipment life cycle management, fault tracing, and performance evaluation, etc.; Currently, in order to reduce storage costs and transmission pressure, existing inspection systems generally use data compression technology to process historical data. Among them, regular compression is a common method, that is, the accumulated operation data is batch-compressed at fixed time intervals and then archived to low-cost storage media. Although this method can effectively reduce the occupied storage space, in actual operation and maintenance, when a power equipment fails, the operation and maintenance personnel need to backtrack and extract the key parameters before the failure to analyze the root cause of the failure; However, the data after regular compression needs to be decompressed before it can be called. In the face of sudden equipment failures, the decompression process inevitably takes a long time. Moreover, the decompressed data may contain data with no analytical value. Decompressing such data will not only waste decompression resources but also be difficult to meet the requirements of rapid fault analysis and precise operation and maintenance; To solve the above problems, the present invention proposes a solution. Summary of the Invention

[0003] The purpose of the present invention is to provide a photovoltaic power station inspection system to solve the problems raised in the above background art.

[0004] The present invention provides a photovoltaic power station inspection system, including: A fault analysis module, used to analyze the fault diagnosis data of several power equipment of a target photovoltaic power station to determine the backtracking duration data of several power equipment of the target photovoltaic power station. The fault diagnosis data includes fault types, fault data segments, and several power equipment and their abnormal data segments; An inspection integration module, used to obtain the operation data of several power equipment of the target photovoltaic power station in real time; A data total control module, used to store the operation data of several power equipment of the target photovoltaic power station transmitted in real time; The data total control module is also used to determine the compression total control period of several power equipment and several compression time intervals of the compression total control period with the reception moment as the starting point moment after receiving the backtracking duration data of several power equipment of the target photovoltaic power station; The data master control module is also used to segment and compressively store the operation data transmitted by a number of power devices within the corresponding compressed master control period according to the determined compressed master control periods of the number of power devices and the number of compressed time intervals of the compressed master control period.

[0005] Further, the steps for the data master control module to determine the compressed master control periods of a number of power devices and the number of compressed time intervals of the compressed master control period with the receiving moment as the starting point moment are as follows: S21: Extract all the retrospective analysis durations of the power device Z1 from the retrospective duration data of all the power devices of the target photovoltaic power station received; S22: Mark all the extracted retrospective analysis durations of the power device Z1 as H1, H2,..., Hh in ascending order of numerical value, where 1 ≤ h ≤ z; S23: Determine the compressed master control period of the power device Z1 according to the retrospective analysis duration Hh, that is, the interval duration of the compressed master control period of the power device Z1 is Hh; S24: Obtain a compressed time interval of the compressed master control period by combining the starting point moment I1 with the retrospective analysis duration H1. At this time, the compressed time interval is [I1 + Hh - H1, I1 + Hh]. Similarly, obtain the compressed time intervals [I1 + Hh - H2, I1 + Hh - H1), [I1 + Hh - H3, I1 + Hh - H2),..., [I1, I1 + Hh - H1] in turn.

[0006] Further, in S21, the retrospective analysis duration includes the retrospective analysis duration of the power device Z1 relative to a number of power devices based on a number of fault types and the retrospective analysis duration of the power device Z1 based on a number of fault types.

[0007] Further, the steps for segmenting and compressing the operation data transmitted by the power device within the corresponding compressed master control period according to the determined compressed master control period of one power device and the number of compressed time intervals of the compressed master control period are as follows: S31: Mark all the compressed time intervals of the compressed master control period as K1, K2,..., Kk, where k ≥ 1; S32: Compress a number of operation data of the power device according to the compressed time interval K1 to obtain the compressed operation data of the power device in the compressed time interval K1, and the content is as follows: Based on the start time and end time of the compressed time interval K1, after receiving the operation data of the power device collected at the end time, compress all the operation data of the power device collected from the start time to the end time once, and store the compressed data as the compressed operation data of the power device in the compressed time interval K1; S33: According to S32, compress the several operation data of the power equipment according to the compression time intervals K2, K3, ..., Kk in sequence to obtain the compressed operation data of the power equipment in the compression time intervals K2, K3, ..., Kk, and store it.

[0008] Furthermore, when the data total control module does not receive the backtracking duration data of several power equipment of the target photovoltaic power station, it stores the preset compression interval duration of all power equipment of the target photovoltaic power station.

[0009] Compared with the prior art, it has the following beneficial effects: In the present invention, the fault analysis module analyzes the fault data segments in the fault diagnosis data of several power equipment and the abnormal data segments of several power equipment. During the analysis process, based on the fault types of different power equipment and several power equipment related to the fault types, calculate the corresponding backtracking analysis duration, and based on this, combined with several fault types during the fault process of the power equipment, set the compression total control period and several compression time intervals for different power equipment. Based on different compression time intervals, segmentally compress the operation data of the corresponding power equipment within a compression total control period. In this way, the compression granularity is accurately matched with the data granularity required for fault backtracking, and at the same time, the efficiency of fault analysis is improved; In the present invention, the compression total control period is divided into multiple compression time intervals, and the system independently compresses the operation data in each interval segmentally. When a fault occurs, the operation and maintenance personnel only need to retrieve and decompress the compressed operation data in the compression time interval corresponding to the fault type and associated equipment, without decompressing all historical data. This greatly shortens the decompression time-consuming during analysis and avoids the waste of computing resources caused by decompressing irrelevant data. Description of the Drawings

[0010] Figure 1 It is the system block diagram of the present invention. Detailed Embodiment

[0011] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0012] Please refer to Figure 1 , this application provides a photovoltaic power station inspection system, including an inspection integration module, a data total control module, and a fault analysis module; A fault analysis module is used to analyze the fault diagnosis data of a number of power equipment in a target photovoltaic power station. The fault diagnosis data of a number of power equipment in the target photovoltaic power station is stored in the fault analysis module; The fault diagnosis data of a power equipment includes a fault type, a fault data segment, a number of power equipment and their abnormal data segments; When a power equipment fails, the management personnel of the target photovoltaic power station analyze the operation data of a number of power equipment retrieved within a fixed period by means of a fault diagnosis model, determine the fault type corresponding to the current failure of the power equipment, and at the same time, starting from the moment of the failure, respectively extract from the power equipment and the operation data of the number of power equipment the operation data with continuous acquisition times that can reflect the fault type and are located before the moment of the failure, and use them as the fault data segment and a number of abnormal data segments of the power equipment for this failure, and generate a fault diagnosis data of the power equipment; The fault diagnosis model can analyze the operation data of power equipment, extract fault features, quickly identify the fault type, locate the abnormal data segment, and give a fault diagnosis result; The fault analysis module is used to analyze the fault diagnosis data of a number of power equipment stored in the target photovoltaic power station. The analysis steps are as follows: S11: Mark all the power equipment in the target photovoltaic power station as Z1, Z2,..., Zz, z≥1, and select the power equipment Z1 as the equipment to be analyzed; S12: Obtain all the fault diagnosis data of the equipment to be analyzed stored in the fault analysis module, and mark them as A1, A2,..., Aa, a≥1, S13: Traverse the fault diagnosis data A1, A2,..., Aa, extract the power equipment corresponding to all the abnormal data segments included therein, and remove duplicates from all the extracted power equipment. Mark the remaining power equipment after deduplication as B1, B2,..., Bb, b≥1; Extract all the fault types included in the fault diagnosis data A1, A2,..., Aa, and remove duplicates from all the extracted fault types. Mark the remaining fault types after deduplication as Y1, Y2,..., Yy, 1≤y≤a; S14: Calculate the retrospective analysis duration of the power equipment B1 relative to the equipment to be analyzed based on the fault type Y1 according to the fault diagnosis data A1, A2,..., Aa according to a preset calculation rule. The calculation rule is as follows: S141: Extract all the fault diagnosis data that simultaneously contain the abnormal data segments of the fault type Y1 and the power equipment B1 from the fault diagnosis data A1, A2,..., Aa, and re-label them as C1, C2,..., Cc respectively, where 1 ≤ c ≤ a; S142: Determine the interval duration D1 of the abnormal data segment according to the interval duration between two adjacent operation data in the abnormal data segment of the power equipment B1 contained in the fault diagnosis data C1. The calculation method of the interval duration C1 is to add the interval durations of two adjacent operation data in the abnormal data segment; S143: Sequentially determine the interval durations D2, D3,..., Dc of the abnormal data segments of the power equipment B1 contained in the fault diagnosis data C2, C3,..., Cc according to S142; S144: Use the formula to calculate and obtain the deviation E1 of the interval durations D1, D2,..., Dc, and compare the sizes of E1 and E, where E is the preset standard deviation. In the formula, D is the average value of the interval durations D1, D2,..., Dc, De represents each of the interval durations D1, D2,..., Dc, and e in De is the subscript from 1 to c, which is used to locate and refer to the specific elements in the interval duration sequence. Its essence is to make De able to represent any value from D1 to Dc through variable indexing; If E1 > E, then delete the corresponding De in descending order of |De - D| and calculate the deviation E1 of the remaining De, and compare the sizes of E1 and E again until E1 ≤ E. Obtain the average value of all the interval durations participating in the calculation of E1 at this time, and use the average value as the backtracking analysis duration of the power equipment B1 relative to the equipment to be analyzed based on the fault type Y1; S15: Sequentially calculate and obtain the backtracking analysis durations of the power equipment B2, B3,..., Bb relative to the equipment to be analyzed based on the fault type Y1 according to S14 from the fault diagnosis data A1, A2,..., Aa; S16: Sequentially extract the fault data segments of the equipment to be analyzed from the fault diagnosis data C1, C2,..., Cc and determine the corresponding interval durations, which are respectively labeled as F1, F2,..., Fa; Use the formula Calculate the deviation G1 of the interval durations F1, F2, ..., Fa, and compare the magnitudes of G1 and G, where G is a preset standard deviation threshold for the interval durations of the device to be analyzed. In the formula, F is the average value of the interval durations F1, F2, ..., Fa, Ff represents each of the interval durations F1, F2, ..., Fa, and f is the subscript from 1 to a in Ff, which is used to locate and refer to specific elements in the interval duration sequence. Essentially, through a variable index, Ff can represent any value from F1 to Fa; If G1 > G, then delete the corresponding Ff in descending order of |Ff - F| and calculate the deviation G1 of the remaining Ff. Compare the magnitudes of G1 and G again until G1 ≤ G. Obtain the average value of all interval durations participating in the calculation of G1 at this time, and use this average value as the retrospective analysis duration of the device to be analyzed based on the fault type Y1; S17: Calculate and obtain the retrospective analysis durations of the power device B1 relative to the device to be analyzed based on the fault types Y2, Y3, ..., Yy in sequence according to S14 to S16; S18: Calculate and obtain the retrospective analysis durations of the power devices B2, B3, ..., Bb relative to the device to be analyzed based on the fault types Y1, Y2, ..., Yy respectively, and the retrospective analysis durations of the power devices B2, B3, ..., Bb based on the fault types Y1, Y2, ..., Yy in sequence according to S13 to S17; Generate the retrospective duration data of the device to be analyzed based on the calculated retrospective analysis durations of the power devices B1, B2, ..., Bb relative to the device to be analyzed based on the fault types Y1, Y2, ..., Yy and the retrospective analysis durations of the device to be analyzed based on the fault types Y1, Y2, ..., Yy; S19: Select the power devices Z2, Z3, ..., Zz as the devices to be analyzed in sequence, and generate the retrospective duration data of the power devices Z2, Z3, ..., Zz in sequence according to S12 to S18; The fault analysis module transmits the generated retrospective duration data of all power devices of the target photovoltaic power station to the data total control module; The inspection integration module is used to inspect the operating states of several power devices of the target photovoltaic power station in real time. The inspection integration module obtains the operating data of several power devices of the target photovoltaic power station in real time and transmits it to the data total control module; After receiving the transmitted real-time operating data of several power devices of the target photovoltaic power station, the data total control module stores it temporarily. The data total control module stores the compressed interval durations of all power devices of the target photovoltaic power station; The data master control module compresses the operation data of the corresponding power equipment of the target photovoltaic power station stored therein every time interval equal to the compression interval duration to obtain the operation compression data of the corresponding power equipment of the target photovoltaic power station in the compression period. Among them, the compression interval duration of all power equipment in the target photovoltaic power station is preset by the management personnel, and the compression interval durations of all power equipment in the target photovoltaic power station are not completely the same; After receiving the backtracking duration data of all power equipment of the target photovoltaic power station transmitted, the data master control module deletes the compression interval durations of all power equipment of the target photovoltaic power station stored therein. At the same time, taking the moment when the backtracking duration data of all power equipment of the target photovoltaic power station is received as the starting point moment, it determines the compression master control period of each power equipment of the target photovoltaic power station and several compression time intervals of the compression master control period. The steps are as follows: S21: Extract all the backtracking analysis durations of power equipment Z1 from the received backtracking duration data of all power equipment of the target photovoltaic power station. Among them, the backtracking analysis duration includes the backtracking analysis duration of power equipment Z1 relative to several power equipment based on several fault types and the backtracking analysis duration of power equipment Z1 based on several fault types; S22: Mark all the backtracking analysis durations of power equipment Z1 extracted in ascending order of numerical value as H1, H2,..., Hh, where 1 ≤ h ≤ z; S23: Determine the compression master control period of power equipment Z1 according to the backtracking analysis duration Hh, that is, the interval duration of the compression master control period of power equipment Z1 is Hh; S24: Obtain the starting point moment I1 and combine it with the backtracking analysis duration H1 to determine a compression time interval of the compression master control period. At this time, the compression time interval is [I1 + Hh - H1, I1 + Hh]. Similarly, the compression time intervals [I1 + Hh - H2, I1 + Hh - H1), [I1 + Hh - H3, I1 + Hh - H2),..., [I1, I1 + Hh - H1] are obtained in turn. Here, it should be noted that in the compression time interval [I1 + Hh - H1, I1 + Hh], I1 + Hh - H1 is the start time and I1 + Hh is the end time. In the compression time intervals [I1 + Hh - H2, I1 + Hh - H1), [I1 + Hh - H3, I1 + Hh - H2),..., [I1, I1 + Hh - H1], the start time and end time are deduced by analogy. Here, it should be noted that in the compression time interval, "[" and "]" are closed interval symbols, meaning including the endpoints, and "(" and ")" are open interval symbols, meaning not including the endpoints. For example, the compression time interval [I1 + Hh - H2, I1 + Hh - H1) means between I1 + Hh - H2 and I1 + Hh - H1, including I1 + Hh - H2 but not including I1 + Hh - H1; For any power device, the steps of segmentally compressing the operation data transmitted by the power device within the corresponding compression total control period according to the determined compression total control period of the power device and several compression time intervals of the compression total control period are as follows: S31: Mark all the compression time intervals of the compression total control period as K1, K2,..., Kk respectively, where k≥1; S32: Compress several operation data of the power device according to the compression time interval K1 to obtain the compressed operation data of the power device in the compression time interval K1, and the content is as follows: Based on the start time and end time of the compression time interval K1, after receiving the operation data of the power device collected at the end time, compress all the operation data of the power device collected from the start time to the end time once, and store the compressed data as the compressed operation data of the power device in the compression time interval K1; S33: Sequentially compress several operation data of the power device according to the compression time intervals K2, K3,..., Kk in accordance with S32 to correspondingly obtain the compressed operation data of the power device in the compression time intervals K2, K3,..., Kk, and store them; After compressing and storing all the operation data collected by all the power devices of the target substation within the compression total control period, the data total control module determines the compression total control period of each power device of the target photovoltaic power station and several compression time intervals of the compression total control period again according to the steps from S21 to S24. At this time, when determining the start moment of the compression total control period of each power device, the moment corresponding to the moment of the backtracking duration data of all the power devices of the target photovoltaic power station + the interval duration of the determined compression total control period of the power device is used as the starting point moment; In this application, for any power device, after determining its compression total control period and several compression time intervals of the compression total control period, segmentally compress and store several operation data of the power device. After the storage is completed, continue to loop this process to segmentally compress and store the operation data of the power device; Some data in the above formula are all numerically calculated by removing their dimensions, and the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0013] The above embodiments are only used to illustrate the technical method of the present invention and not to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical method of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A photovoltaic power station inspection system, characterized in that, Including: A fault analysis module, which is used to analyze the fault diagnosis data of several power equipment in a target photovoltaic power station to determine the backtracking duration data of several power equipment in the target photovoltaic power station. The fault diagnosis data includes fault types, fault data segments, several power equipment and their abnormal data segments; An inspection integration module, which is used to obtain the operation data of several power equipment in the target photovoltaic power station in real time; A data general control module, which is used to store the operation data of several power equipment in the target photovoltaic power station transmitted in real time; The data general control module is also used to, after receiving the backtracking duration data of several power equipment in the target photovoltaic power station, use the receiving moment as the starting moment to determine the compression general control period of several power equipment and several compression time intervals of the compression general control period; The data general control module is also used to segment and compressively store the operation data transmitted by several power equipment within the corresponding compression general control period according to the determined compression general control period of several power equipment and several compression time intervals of the compression general control period.

2. The photovoltaic power station inspection system according to claim 1, wherein The steps to determine the backtracking duration data of several power equipment in the target photovoltaic power station are as follows: S11: Mark all the power equipment in the target photovoltaic power station as Z1, Z2,..., Zz respectively, where z≥1, and select the power equipment Z1 as the equipment to be analyzed; S12: Obtain all the fault diagnosis data of the equipment to be analyzed stored in the fault analysis module, and mark them as A1, A2,..., Aa respectively, where a≥1, S13: Traverse the fault diagnosis data A1, A2,..., Aa, extract the power equipment corresponding to all the abnormal data segments contained therein, and remove duplicates from all the extracted power equipment. Mark all the remaining power equipment after duplicate removal as B1, B2,..., Bb respectively, where b≥1; Extract all the fault types contained in the fault diagnosis data A1, A2,..., Aa, and remove duplicates from all the extracted fault types. Mark all the remaining fault types after duplicate removal as Y1, Y2,..., Yy respectively, where 1≤y≤a; S14: Calculate and obtain the backtracking analysis duration of the power equipment B1 relative to the equipment to be analyzed based on the fault type Y1 according to the preset calculation rule according to the fault diagnosis data A1, A2,..., Aa. The calculation rule is as follows: S141: Extract all the fault diagnosis data that simultaneously contain the fault type Y1 and the abnormal data segment of the power equipment B1 in the fault diagnosis data A1, A2,..., Aa, and re-mark them as C1, C2,..., Cc respectively, where 1≤c≤a; S142: Determine the interval duration D1 of the abnormal data segment according to the interval duration between two adjacent operation data in the abnormal data segment of the power equipment B1 contained in the fault diagnosis data C1; S143: Determine the interval durations D2, D3,..., Dc of the abnormal data segments of the power equipment B1 contained in the fault diagnosis data C2, C3,..., Cc in turn according to S142; S144: Using the formula calculate and obtain the deviation E1 of the interval durations D1, D2, ..., Dc, and compare the magnitudes of E1 and E, where E is a preset standard deviation, and D in the formula is the average value of the interval durations D1, D2, ..., Dc; If E1 > E, then delete the corresponding De in descending order of |De - D| and calculate the deviation E1 of the remaining De. Compare the E1 at this time with E again until E1 ≤ E. Obtain the average value of all interval durations involved in calculating E1 at this time, and use the average value as the retrospective analysis duration of power device B1 relative to the device to be analyzed based on fault type Y1; S15: Calculate and obtain the retrospective analysis durations of power devices B2, B3,..., Bb relative to the device to be analyzed based on fault type Y1 in sequence according to S14 from the fault diagnosis data A1, A2,..., Aa; S16: Extract the fault data segments of the device to be analyzed from the fault diagnosis data C1, C2,..., Cc in sequence and determine the corresponding interval durations, which are respectively marked as F1, F2,..., Fa; Using the formula calculate the deviation G1 of the interval durations F1, F2, ..., Fa, and compare the magnitudes of G1 and G, where G is a preset standard deviation threshold for the interval durations of the device to be analyzed. In the formula, F is the average of the interval durations F1, F2, ..., Fa; If G1 > G, then delete the corresponding Ff in descending order of |Ff - F| and calculate the deviation G1 of the remaining Ff. Compare the G1 at this time with G again until G1 ≤ G. Obtain the average value of all interval durations involved in calculating G1 at this time, and use the average value as the retrospective analysis duration of the device to be analyzed based on fault type Y1; S17: Calculate and obtain the retrospective analysis durations of power device B1 relative to the device to be analyzed based on fault types Y2, Y3,..., Yy in sequence according to S14 to S16; S18: Calculate and obtain the retrospective analysis durations of power devices B2, B3,..., Bb relative to the device to be analyzed based on fault types Y1, Y2,..., Yy in sequence according to S13 to S17, and the retrospective analysis durations of power devices B2, B3,..., Bb based on fault types Y1, Y2,..., Yy; Generate the retrospective duration data of the device to be analyzed according to the calculated retrospective analysis durations of power devices B1, B2,..., Bb relative to the device to be analyzed based on fault types Y1, Y2,..., Yy and the retrospective analysis durations of the device to be analyzed based on fault types Y1, Y2,..., Yy; S19: Select power devices Z2, Z3,..., Zz as the devices to be analyzed in sequence, and generate the retrospective duration data of power devices Z2, Z3,..., Zz in sequence according to S12 to S18.

3. The photovoltaic power station inspection system according to claim 2, wherein, The data total control module determines the compression total control period of several power devices and several compression time intervals of the compression total control period with the reception moment as the starting point moment as follows: S21: Extract all the retrospective analysis durations of power device Z1 from the retrospective duration data of all power devices of the target photovoltaic power station received; S22: Mark all the extracted retrospective analysis durations of power device Z1 as H1, H2,..., Hh in ascending order of numerical value, where 1 ≤ h ≤ z; S23: Determine the compression total control period of power device Z1 according to the retrospective analysis duration Hh, that is, the interval duration of the compression total control period of power device Z1 is Hh; S24: Obtain a compression time interval of the compression total control period by combining the starting point time I1 with the backtracking analysis duration H1. At this time, the compression time interval is [I1 + Hh - H1, I1 + Hh]. Similarly, obtain the compression time intervals [I1 + Hh - H2, I1 + Hh - H1), [I1 + Hh - H3, I1 + Hh - H2),..., [I1, I1 + Hh - H1] in sequence.

4. The photovoltaic power station inspection system according to claim 3, wherein In S21, the backtracking analysis duration includes the backtracking analysis duration of the power device Z1 relative to several power devices based on several fault types and the backtracking analysis duration of the power device Z1 based on several fault types.

5. A photovoltaic power station inspection system according to claim 1, characterized in that, The steps for segmenting and compressing the operation data transmitted by a power device within the corresponding compression total control period according to the determined compression total control period of a power device and several compression time intervals of the compression total control period are as follows: S31: Mark all the compression time intervals of the compression total control period as K1, K2,..., Kk respectively, where k ≥ 1; S32: Compress several operation data of the power device according to the compression time interval K1 to obtain the compressed operation data of the power device in the compression time interval K1, the details are as follows: Based on the start time and end time of the compression time interval K1, after receiving the operation data of the power device collected at the end time, compress all the operation data of the power device collected from the start time to the end time once, and store the compressed data as the compressed operation data of the power device in the compression time interval K1; S33: In sequence according to S32, compress several operation data of the power device according to the compression time intervals K2, K3,..., Kk respectively to obtain the compressed operation data of the power device in the compression time intervals K2, K3,..., Kk, and store them.

6. The photovoltaic power station inspection system according to claim 1, characterized in that, When the data total control module does not receive the backtracking duration data of several power devices of the target photovoltaic power station, it stores the preset compression interval duration of all power devices of the target photovoltaic power station in it.

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