Method and system for determining trouble-free operation time after scheduled inspection of a station based on original data

Abstract

The present invention relates to a method and system for determining the trouble-free operation time of a station after a scheduled inspection based on original data, wherein the method comprises: recording the recovery operation time point T3 of each wind turbine in the station after the scheduled inspection; recording the first non-resettable fault time point T2 within a specified time interval after the recovery operation after the scheduled inspection; calculating the trouble-free operation time T4 of each wind turbine after the scheduled inspection; the operation sum S1 of each wind turbine = the trouble-free operation time T4 after the scheduled inspection of each wind turbine * the average installed capacity C1 corresponding to each wind turbine, accumulating the operation sum S1 of each wind turbine in the station to form the station operation sum S2, accumulating the average installed capacity C1 of each wind turbine in the station to form the station installed capacity sum C2, calculating the trouble-free operation time t of the station after the scheduled inspection within the specified time interval 定检 =S2 / C2. The trouble-free operation time after the station scheduled inspection determined by the method of the present invention is more accurate and has high data reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of determining the operating time of a wind power station, and in particular to a method and a system for determining the trouble-free operating time of a station after scheduled inspection based on original data. Background Art

[0002] At present, wind turbines need to be inspected regularly in wind power stations, and the operation of wind turbines needs to be restored after regular inspection. The trouble-free operation time of the station after regular inspection can be counted within a specified time interval to evaluate and understand the overall operation of the station. Figure 2 Method A in the formula is: record the recovery time point T3 of each wind turbine in the station after the scheduled inspection; record the first irreversible fault time point T2 within the specified time interval after the recovery after the scheduled inspection; the trouble-free operation time T4 of each wind turbine after the scheduled inspection == the first irreversible fault time point T2 of each wind turbine - the recovery time point T3 of each wind turbine; add up the trouble-free operation time T4 of each wind turbine after the scheduled inspection to get the total trouble-free operation time of the station after the scheduled inspection, and divide the total trouble-free operation time of the station after the scheduled inspection by the number of wind turbines to get the trouble-free operation time of the station after the scheduled inspection. Figure 1 In the table, column E is the recovery time point T3 of the fan, column I is the trouble-free operation time T4 of the fan after the regular inspection, and the data of each fan in column I are accumulated and divided by the number of fans to obtain Figure 2 The fault-free operation time after the station inspection obtained by using method A under the condition of no faults is 228.6835185 hours.

[0003] However, the status of each wind turbine in the station is different. Some of them were put into operation earlier and were operating normally when the station's regular inspection began, while some had not yet been put into operation when the regular inspection began. Some of them operated normally from the time the wind turbine resumed operation after the regular inspection to the end time of the statistics without the first non-resettable fault, or other power-limited, offline, standby and other states occurred from the time the wind turbine resumed operation after the regular inspection to the end time of the statistics. The above original calculation method did not exclude the downtime of other states, and the wind turbines that had just been put into operation were also included in the statistics, resulting in a large error in the final determined fault-free operation time after the regular inspection of the station, and poor data reliability. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a method and system for determining the trouble-free operation time of a station after a scheduled inspection based on original data, and the determined trouble-free operation time of the station after a scheduled inspection is more accurate.

[0005] The technical solution adopted by the present invention to solve the above technical problem is: a method for determining the trouble-free operation time of a station after scheduled inspection based on raw data, comprising the following steps:

[0006] Record the resumption time point T3 of each wind turbine in the station after the scheduled inspection;

[0007] Within the specified time interval after the scheduled inspection and resumption of operation, the time point T2 of the first irresettable fault is recorded;

[0008] Calculate the trouble-free operation time T4 of each fan after the scheduled inspection;

[0009] The following steps are also included:

[0010] The total operation sum of each wind turbine S1 = the trouble-free operation time after the regular inspection of each wind turbine T4 * the average installed capacity C1 corresponding to each wind turbine. The total operation sum S1 of each wind turbine in the station is accumulated to form the total operation sum S2 of the station. The average installed capacity C1 of each wind turbine in the station is accumulated to form the total installed capacity C2 of the station. The trouble-free operation time t after the regular inspection of the station in the specified time interval is calculated. 定检 =S2 / C2.

[0011] Preferably, if the fan does not have an irresettable fault within the specified time interval, the time point T2 of the first irresettable fault of each fan is the end time of the specified time interval after each fan resumes operation after the regular inspection; if an irresettable fault occurs in the fan within the specified time interval, the time point of the first irresettable fault is recorded.

[0012] Preferably, a method for calculating the trouble-free operation time of each fan after the regular inspection is as follows: the trouble-free operation time of each fan after the regular inspection T4 = the first non-resettable fault time point T2 of each fan - the recovery operation time point T3 of each fan.

[0013] Preferably, another method for calculating the trouble-free operation time of each fan after the regular inspection is as follows: The method for calculating the trouble-free operation time T4 of each fan after the regular inspection is as follows:

[0014] If the fan does not contain other states except the running state and does not have any irresettable faults within the specified time interval, then the fault-free running time T4 of each fan after the scheduled inspection = the end time of the specified time interval after the scheduled inspection and resumption of operation of each fan - the resumption time point T3 of each fan;

[0015] If the fan does not contain other states except the running state and has an irreversible fault within the specified time interval, the trouble-free running time T4 of each fan after the scheduled inspection = the first irreversible fault time point T2 of each fan - the recovery time point T3 of each fan - the downtime due to the fault;

[0016] If the fan has other states except the running state in the specified time interval and no irresettable fault occurs, the fault-free running time T4 of each fan after the scheduled inspection = the end time of the specified time interval after the scheduled inspection and resumption of operation of each fan - the resumption time point T3 of each fan - the running time of other states;

[0017] If the fan contains other states except the operating state within the specified time interval and an irreversible fault occurs, the trouble-free operation time T4 of each fan after the regular inspection = the first irreversible fault time point T2 of each fan - the recovery operation time point T3 of each fan - the operation time of other states - the fault downtime.

[0018] Preferably, the method for determining the average installed capacity C1 corresponding to each wind turbine is:

[0019] If the commissioning date T of the fan unit is ≤ the set initial date of scheduled inspection T1, then the average installed capacity C1 of the fan unit is equal to the single unit capacity C of the fan unit;

[0020] If the set initial date of scheduled inspection T1 is less than the commissioning date of the fan unit T≤ the time point of the first irreversible fault T2, then the average installed capacity of the fan C1 is C / (T2-T)*C / (T2-T1);

[0021] If the time point of the first non-resettable fault T2 is less than the commissioning date T of the wind turbine unit, the average installed capacity C1 of the wind turbine is 0.

[0022] A system uses the method for determining the trouble-free operation time of a station after scheduled inspection based on raw data to determine the trouble-free operation time of a station after scheduled inspection.

[0023] The beneficial effect of the present invention is that when multiple units have their first non-resettable faults within a statistical interval, weighted accumulation is performed according to the average installed capacity. The trouble-free operation time after the station inspection determined by the method of the present invention is more accurate than the data obtained by the existing method, and the data reliability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is the recorded data and calculated data of each scheduled inspection fan in the station;

[0025] Figure 2 It is a comparison table of data obtained by using the method B of the present invention and the existing method A in various situations.

[0026] Figure 3 It is a flow chart of a method for determining the trouble-free operation time of a station after scheduled inspection based on raw data of the present invention; DETAILED DESCRIPTION

[0027] The present invention will now be described in further detail in conjunction with the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0028] like Figure 3 As shown, a method for determining the trouble-free operation time of a station after scheduled inspection based on raw data includes the following steps:

[0029] Record the resumption time point T3 of each wind turbine in the station after the scheduled inspection, such as Figure 1 The time in column E;

[0030] Within the specified time interval after the fan resumes operation after the scheduled inspection, the first irresettable fault time point T2 is recorded. If the fan has an irresettable fault within the specified time interval, the first irresettable fault time point is recorded. If the fan does not have an irresettable fault within the specified time interval, the first irresettable fault time point T2 of each fan is the end time of the specified time interval after each fan resumes operation after the scheduled inspection, such as Figure 1 The time in column H;

[0031] Calculate the trouble-free operation time T4 of each fan after the scheduled inspection;

[0032] The following steps are also included:

[0033] The total operation time of each fan S1 = the trouble-free operation time after the regular inspection of each fan T4 * the average installed capacity C1 corresponding to each fan, such as Figure 1 S1=868730.8333, the total operation sum S1 of each wind turbine in the station is accumulated to form the total operation sum S2 of the station. S2 is as follows Figure 1 The cumulative sum of the data is 13472535.14. The average installed capacity C1 of each wind turbine in the station is accumulated to form the total installed capacity C2 of the station. Figure 1 The data in is 58500, and the trouble-free operation time t of the station after the regular inspection within the specified time interval is calculated. 定检 =S2 / C2.

[0034] Specifically, in an optional implementation manner, the method for calculating the trouble-free operation time T4 of each wind turbine after the scheduled inspection is:

[0035] If the fan does not have any other status except the running status and no irresettable fault occurs during the specified time interval, the trouble-free running time T4 of each fan after the scheduled inspection = the end time of the specified time interval after the scheduled inspection and resumption of operation of each fan - the resumption time point T3 of each fan; Figure 1 The time in column I is the trouble-free operation time T4 of each fan after the regular inspection in this case.

[0036] If the fan does not have any other status except the running status and has an irreversible fault within the specified time interval, the trouble-free running time T4 of each fan after the scheduled inspection = the first irreversible fault time point T2 of each fan - the recovery time point T3 of each fan - the downtime due to the fault; Figure 1 The time in column M is the trouble-free operation time T4 of each fan after the regular inspection in this case.

[0037] If the fan has other states except the running state in the specified time interval and no irresettable fault occurs, the fault-free running time T4 of each fan after the scheduled inspection = the end time of the specified time interval after the scheduled inspection and resumption of operation of each fan - the resumption time point T3 of each fan - the running time of other states;

[0038] If the fan has other states except the running state and has a non-resettable fault in the specified time interval, the trouble-free running time T4 of each fan after the regular inspection = the first non-resettable fault time point T2 of each fan - the recovery time point T3 of each fan - the running time of other states - the downtime due to fault; Figure 1 The time in column K is the trouble-free operation time T4 of each fan after the regular inspection in this case.

[0039] Specifically, in an optional implementation manner, the method for determining the average installed capacity C1 corresponding to each wind turbine is:

[0040] If the commissioning date T of the fan unit is less than or equal to the set initial date of scheduled inspection T1, then the average installed capacity C1 of the fan unit is equal to the single unit capacity C of the fan unit. Figure 1 In the figure, the trouble-free operation time T4 of the first wind turbine after the scheduled inspection is 579.153889, and its commissioning date is November 8, 2009, which is earlier than the set initial date of the scheduled inspection T1, such as May 1, 2023. Its single-unit capacity is 1500KW, and its corresponding average installed capacity C1 is 1500KW.

[0041] If the set initial inspection date T1 is less than the commissioning date T of the fan unit and less than the time point T2 of the first irreversible fault, then the average installed capacity of the fan C1 is C / (T2-T)*C / (T2-T1); Figure 1 In the P-S columns, it is assumed that two wind turbines were put into operation in May, that is, when the set initial inspection date T1 is May 1, 2023, the two wind turbines have not yet been put into operation, but have been put into operation for a period of time before the first irreversible fault time point T2, then the average installed capacity of the wind turbine is C1 = (T2-T)*C / (T2-T1), such as 1403.225806 and 1806.451613 in the list.

[0042] If the time point of the first non-resettable fault T2 is less than the commissioning date T of the wind turbine unit, the average installed capacity C1 of the wind turbine is 0.

[0043] A system uses the method for determining the trouble-free operation time of a station after scheduled inspection based on raw data to determine the trouble-free operation time of a station after scheduled inspection.

[0044] For example, a wind farm has 60 wind turbines, 39 of which have completed scheduled inspections in May 2023. Figure 2 To determine the trouble-free operation time of a station after regular inspection by using the existing method A and the method B of the present invention.

[0045] If the fan does not contain any other state except the running state and no irresettable fault occurs within the specified time interval, the data obtained by using the existing method A for other states except the running state, such as power limit, offline, standby, etc., is 228.6835185, and the data obtained by using the method B of the present invention is 230.299746.

[0046] If the fan has other states except the running state within the specified time interval and the running time of other states is excluded and a non-resettable fault occurs, the data obtained by using the existing A method is 216.3520513, and the data obtained by using the B method of the present invention is 217.9682787.

[0047] If the fan does not have any other state except the running state and a non-resettable fault occurs within the specified time interval, the data obtained by using the existing method A is 223.3776923, and the data obtained by using the method B of the present invention is 224.9939198.

[0048] Assuming that two wind turbines have just been put into operation in May, and within the specified time interval, the wind turbines have other states except the running state and exclude the running time of other states and an irreversible fault, the data obtained by using the existing method A is 216.3520513, and the data obtained by using the method B of the present invention is 217.2792122.

[0049] The wind farm had 39 units inspected in May 2023, of which two were 2000Kw, two were 1000Kw, and the remaining were 1500Kw. The time of operation after the inspection varied, and the statistical time was up to the end of May. If all were in operation, the trouble-free operation time after the inspection obtained by method B would be higher than the data obtained by method A. When multiple units had the first non-resettable fault within the statistical interval, the trouble-free operation time after the inspection obtained by method B would be more accurate than the data obtained by method A, and the data reliability would be high. If two of them were newly commissioned units in early May with a capacity of 2000Kw, the trouble-free operation time after the inspection obtained by method B would be more reliable than the data obtained by method A, and the error would be smaller than the actual trouble-free operation time after the inspection.

[0050] The above description only describes the specific implementation mode of the present invention. Various examples do not limit the essential content of the present invention. After reading the description, ordinary technicians in the relevant technical field can modify or deform the specific implementation modes described above without departing from the essence and scope of the invention.

Claims

1. A method for determining the trouble-free operation time of a station after scheduled inspection based on raw data, comprising the following steps: Record the resumption time point T3 of each wind turbine in the station after the scheduled inspection; Within the specified time interval after the scheduled inspection and resumption of operation, the time point T2 of the first irresettable fault is recorded; Calculate the trouble-free operation time T4 of each fan after the scheduled inspection; Features: The following steps are also included: The total operation sum of each wind turbine S1 = the trouble-free operation time after the regular inspection of each wind turbine T4 * the average installed capacity C1 corresponding to each wind turbine. The total operation sum S1 of each wind turbine in the station is accumulated to form the total operation sum S2 of the station. The average installed capacity C1 of each wind turbine in the station is accumulated to form the total installed capacity C2 of the station. The trouble-free operation time t after the regular inspection of the station in the specified time interval is calculated. 定检 =S2 / C2; The method for calculating the trouble-free operation time T4 of each fan after the regular inspection is: If the fan does not contain other states except the running state and does not have any irresettable faults within the specified time interval, then the fault-free running time T4 of each fan after the scheduled inspection = the end time of the specified time interval after the scheduled inspection and resumption of operation of each fan - the resumption time point T3 of each fan; If the fan does not contain other states except the running state and has an irreversible fault within the specified time interval, the trouble-free running time T4 of each fan after the scheduled inspection = the first irreversible fault time point T2 of each fan - the recovery time point T3 of each fan - the downtime due to the fault; If the fan has other states except the running state in the specified time interval and no irresettable fault occurs, the fault-free running time T4 of each fan after the scheduled inspection = the end time of the specified time interval after the scheduled inspection and resumption of operation of each fan - the resumption time point T3 of each fan - the running time of other states; If the fan has other states except the running state and an irreversible fault occurs during the specified time interval, the trouble-free running time T4 of each fan after the scheduled inspection = the first irreversible fault time point T2 of each fan - the recovery time point T3 of each fan - the running time of other states - the downtime due to the fault; The method for determining the average installed capacity C1 corresponding to each wind turbine is: If the commissioning date T of the fan unit is ≤ the set initial date of scheduled inspection T1, then the average installed capacity C1 of the fan unit is equal to the single unit capacity C of the fan unit; If the set initial date of scheduled inspection T1 is less than the commissioning date of the fan unit T≤ the time point of the first irreversible fault T2, then the average installed capacity of the fan C1 = (T2-T)*C / (T2-T1); If the time point of the first non-resettable fault T2 is less than the commissioning date T of the wind turbine unit, the average installed capacity C1 of the wind turbine is 0.

2. The method for determining the trouble-free operation time of a station after scheduled inspection based on raw data according to claim 1 is characterized in that: If no non-resettable fault occurs to the fan within the specified time interval, the time point T2 of the first non-resettable fault of each fan is the end time of the specified time interval after each fan resumes operation after the scheduled inspection; If a non-resettable fault occurs to the fan within the specified time interval, the time point of the first non-resettable fault is recorded.

3. A system, characterized in that: The method for determining the trouble-free operation time after the scheduled inspection of a station based on original data as described in claims 1-2 is used to determine the trouble-free operation time after the scheduled inspection of the station.

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