Time statistical method and device for unstable area of hydroelectric generating set and storage medium

Abstract

The invention discloses a hydroelectric generating set unstable area time statistical method and device and a storage medium. The method comprises the steps of obtaining working condition data of a hydroelectric generating set; pre-processing the acquired working condition data, wherein the pre-processing comprises data table conversion, data value compensation, data frequency reduction and abnormal value screening in sequence; obtaining an operation area map of the hydroelectric generating set; judging whether the operation condition of the hydroelectric generating set is in a stable operation area or a non-stable operation area according to the hydroelectric generating set operation area map; calculating the operation time of the hydroelectric generating set in the stable area; calculating the operation time of the hydroelectric generating set in the unstable area; calculating the operation time, wherein the operation time is the sum of the operation time of the stable area and the operation time of the non-stable area; and calculating the proportion of the running time of the unstable area in the running time.

Description

Technical Field

[0001] The invention relates to hydroelectric power generation equipment technology, and in particular to a method, a device and a storage medium for counting time in an unstable area of ​​a hydroelectric generator set. Background Art

[0002] Since the operation of the hydro-generator unit is affected by multiple factors such as hydraulic, mechanical, and electrical factors, and operates in an unstable area, the operating conditions of the unit deteriorate, and the values ​​of stability indicators such as swing, vibration, pressure pulsation, and noise increase abnormally, which may cause safety accidents such as parts fatigue damage or even structural damage.

[0003] The statistics of the operation time of hydropower units in unstable areas in existing solutions are mostly manual statistical methods based on dispatch orders, which have a certain effect on the reliable and stable operation of hydropower units, but also have the following shortcomings: the operation time in unstable areas is not automatically counted by computer; the calculation granularity of manual statistics is relatively large, and the calculation results are not accurate enough. Summary of the invention

[0004] The invention provides a method, a device and a storage medium for time statistics of a non-stable area of ​​a hydropower unit.

[0005] In a first aspect, the present invention provides a method for counting time in an unstable region of a hydropower unit, the method comprising: Obtain the operating data of the hydro-generator set; Preprocess the acquired working condition data, including: data table transfer, data value supplement, data frequency reduction and abnormal value screening; Obtain the operating area map of the hydropower unit; According to the hydropower unit operation area map, determine whether the operating condition of the hydropower unit is in the stable operation area or the unstable operation area; Calculate the time that the hydropower unit operates in the stable zone ; Calculate the time that the hydropower unit operates in the unstable area ; Calculate the running time, running time Running time in stable zone The sum of the running time in the unstable region : ; Calculate the running time in the unstable region At runtime The proportion of : .

[0006] Furthermore, the acquisition of the operating data of the hydro-generator set , specifically: Each interval duration , communicate with the big data platform to obtain the operating data of the hydro-generator set, including active power , head data .

[0007] Furthermore, the data table transfer, data value supplement, data frequency reduction and abnormal value screening are specifically: Data conversion: converting time series data into structured data that is easy for users to analyze; Data filling: fill in the missing data collected on-site or after the table is transferred; Data frequency reduction and data timestamp alignment; Outlier screening: Screen the data collected on-site that contain abnormalities. Furthermore, the operation area diagram of the hydropower unit includes: Prohibited operating area, stable 1 operating area, restricted operating area and stable 2 operating area; among them, the prohibited operating area and restricted operating area are unstable operating areas, and the stable 1 operating area and stable 2 operating area are stable operating areas.

[0008] Furthermore, the time for calculating the hydropower unit to operate in the stable zone is ; Calculate the time that the hydropower unit operates in the unstable area , specifically: If the operating condition of the hydropower unit is in the stable operating area, the collection period of the operating condition data The attribute is assigned to the stable zone running time , and perform statistical accumulation calculations; If the operating condition of the hydropower unit is in the unstable operating area, the collection period of the operating condition data The attribute is assigned to the running time of the unstable area , and statistically accumulate and calculate.

[0009] Furthermore, the method further comprises: Output results, including runtime in unstable region Cumulative value, unstable zone running time At runtime The proportion of .

[0010] In a second aspect, the present invention provides a device for counting time in an unstable region of a hydropower unit, the device comprising: Data acquisition and processing module for: Obtain the operating data of the hydro-generator set; Preprocess the acquired working condition data, including: data table transfer, data value supplement, data frequency reduction and abnormal value screening; Data calculation module, used for: Obtain the operating area map of the hydropower unit; According to the hydropower unit operation area map, determine whether the operating condition of the hydropower unit is in the stable operation area or the unstable operation area; Calculate the time that the hydropower unit operates in the stable zone ; Calculate the time that the hydropower unit operates in the unstable area ; Calculate the running time, running time Running time in stable zone and unstable zone running time sum; Calculate the running time in the unstable region At runtime The proportion of .

[0011] Furthermore, the device also includes: Output modules for: Output results, including runtime in unstable region Cumulative value, unstable zone running time The percentage of running time.

[0012] In a third aspect, the present invention provides a device for counting time in an unstable region of a hydropower unit, the device comprising: Memory, used to store programs; The processor is used to execute the program stored in the memory. When the program stored in the memory is executed, the processor is used to execute the above method.

[0013] In a fourth aspect, the present invention provides a storage medium storing computer-readable instructions, which, when executed by one or more processors, causes the one or more processors to execute the above method.

[0014] Compared with the prior art, the present invention has the following advantages: 1. The present invention can automatically and accurately count the operating time of the unit in the unstable area by analyzing the operating data of the hydropower unit, providing a basis for optimizing the operation of the unit.

[0015] 2. The solution of the present invention can quickly calculate the running time of the unstable region with a smaller calculation granularity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a method for counting time in an unstable region of a hydropower unit provided by an embodiment of the present invention; Figure 2 A schematic diagram of an operating area diagram of a hydroelectric unit provided in an embodiment of the present invention; Figure 3 A schematic diagram of the composition of a time statistics device for a non-stable region of a hydropower unit provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0018] Figure 1 A schematic diagram of a method for counting time in an unstable region of a hydropower unit provided in an embodiment of the present invention, the method comprising: Obtain the operating data of the hydro-generator set; Preprocess the acquired working condition data, including: data table transfer, data value supplement, data frequency reduction and abnormal value screening; Obtain the operating area map of the hydropower unit; According to the hydropower unit operation area map, determine whether the operating condition of the hydropower unit is in the stable operation area or the unstable operation area; Calculate the time that the hydropower unit operates in the stable zone ; Calculate the time that the hydropower unit operates in the unstable area ; Calculate the running time, running time Running time in stable zone The sum of the running time in the unstable region : ; Calculate the running time in the unstable region At runtime The proportion of : .

[0019] Furthermore, the operating data of the hydro-generator set is obtained , specifically: Each interval duration , communicate with the big data platform to obtain the operating data of the hydro-generator set, including active power , head data .

[0020] Furthermore, the data table transfer, data value supplement, data frequency reduction and abnormal value screening are specifically: Data conversion: converting time series data into structured data that is easy for users to analyze; Data filling: fill in the missing data collected on site or after the table is transferred. Linear interpolation is used to fill in the missing data. The specific formula is: ; in, No. The operating data of the hydro-generator set at each moment.

[0021] The data is down-converted, the timestamps of the data are aligned, and the average method is used for down-conversion. The data point values ​​after down-conversion are: ; in, Indicates the number of raw data points in a frequency reduction cycle, is an index variable used to traverse all raw data points within a frequency reduction cycle. Indicates the index of the data point after frequency reduction in each cycle.

[0022] Outlier screening: Screen the data collected on site that contains abnormalities. Specifically expressed as: ; in, represents the mean of all data points, Represents the standard deviation of all data points.

[0023] In one embodiment, data conversion table: converting time series data into structured data that is easy for users to analyze; specifically, converting from a long table to a wide table. For example, the headers of a long table are id, time, and v (index value, such as active power value, water head value, etc.), and the headers of a wide table are time, active power, water head, etc.; Data supplementation: Because the data timestamps of different measuring points in each system may not be aligned, there may be data missing after the table is transferred; or there may be data missing in the on-site collection, so the data is supplemented; Data frequency reduction to achieve data timestamp alignment; Outlier screening: The data collected on site may contain abnormal data due to interference from external factors. The specific screening method is to use the 3sigma principle. If the difference between the data and the mean is less than 3 times the standard deviation, the data will be retained. The 3sigma principle refers to the distribution of values ​​within (μ-3 , μ+3 ) is 0.9974, which means that about 99.7% of the data will be distributed within three standard deviations around the mean μ. Within.

[0024] In one embodiment, the operation area diagram of the hydroelectric generator unit includes: Prohibited operating area, stable 1 operating area, restricted operating area and stable 2 operating area; among them, the prohibited operating area and restricted operating area are unstable operating areas, and the stable 1 operating area and stable 2 operating area are stable operating areas.

[0025] Figure 2 Schematic diagram of the operating area of ​​the hydropower unit provided in the embodiment of the present invention; in the figure, the X-axis is the output, that is, the active power, and the Y-axis is the water head. From left to right, there are four operating areas, namely the prohibited operating area, the stable 1 operating area, the restricted operating area, and the stable 2 operating area. Among them, the prohibited operating area and the restricted operating area are unstable operating areas, and the stable 1 operating area and the stable 2 operating area are stable operating areas.

[0026] Furthermore, the calculation of the time that the hydropower unit is operating in the stable zone and the calculation of the time that the hydropower unit is operating in the unstable zone are specifically: If the operating condition of the hydropower unit is in the stable operating area, the collection period Δt attribute of the operating condition data is assigned as the stable area operating time, and the statistics are accumulated and calculated; If the operating condition of the hydropower unit is in the unstable operating area, the collection period of the operating condition data The attribute value is the running time in the unstable area, and the statistics are accumulated and calculated.

[0027] Furthermore, the method further comprises: The output results include the cumulative value of the unstable area running time and the proportion of the unstable area running time in the running time.

[0028] An embodiment of the present invention provides a device for counting time in an unstable region of a hydropower unit, the device comprising: Data acquisition and processing module for: Obtain the operating data of the hydro-generator set; Preprocess the acquired working condition data, including: data table transfer, data value supplement, data frequency reduction and abnormal value screening; Data calculation module, used for: Obtain the operating area map of the hydropower unit; According to the hydropower unit operation area map, determine whether the operating condition of the hydropower unit is in the stable operation area or the unstable operation area; Calculate the time that the hydropower unit operates in the stable area; calculate the time that the hydropower unit operates in the unstable area; Calculate the running time, which is the sum of the running time in the stable area and the running time in the unstable area; Calculate the proportion of the running time in the unstable area in the running time.

[0029] Furthermore, the device also includes: Output modules for: The output results include the cumulative value of the unstable area running time and the proportion of the unstable area running time in the running time.

[0030] Figure 3 A schematic diagram of a time statistics device for a hydropower unit in an unstable region provided by an embodiment of the present invention; the device comprises: Memory, used to store programs; The processor is used to execute the program stored in the memory. When the program stored in the memory is executed, the processor is used to execute the above method.

[0031] In addition, an embodiment of the present invention provides a storage medium storing computer-readable instructions, and when the computer-readable instructions are executed by one or more processors, the one or more processors execute the above method.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for calculating the time statistics of the unstable area of ​​a hydropower unit, characterized in that: The method comprises: Obtain the operating data of the hydro-generator set; Preprocess the acquired working condition data, including: data table transfer, data value supplement, data frequency reduction and abnormal value screening; Obtain the operating area map of the hydropower unit; According to the hydropower unit operation area map, determine whether the operating condition of the hydropower unit is in the stable operation area or the unstable operation area; Calculate the time that the hydropower unit operates in the stable zone ; Calculate the time that the hydropower unit operates in the unstable area ; Calculate the running time, running time Running time in stable zone The sum of the running time in the unstable region : ； Calculate the running time in the unstable region At runtime The proportion of : 。 2. The method for calculating the time statistics of the unstable area of ​​a hydropower unit according to claim 1, characterized in that: Acquiring the operating data of the hydro-generator set , specifically: Each interval duration , communicate with the big data platform to obtain the operating data of the hydro-generator set, including active power , head data .

3. The method for calculating the time statistics of the unstable area of ​​a hydropower unit according to claim 1, characterized in that: The data table transfer, data value supplement, data frequency reduction and abnormal value screening are specifically as follows: Data conversion: converting time series data into structured data that is easy for users to analyze; Data filling: fill in the missing data collected on-site or after the table is transferred; Data frequency reduction and data timestamp alignment; Outlier screening: Screen the data collected on-site that contain abnormalities.

4. The method for calculating the time statistics of the unstable area of ​​a hydropower unit according to claim 1, characterized in that: The operation area diagram of the hydropower unit includes: Prohibited operating area, stable 1 operating area, restricted operating area and stable 2 operating area; among them, the prohibited operating area and restricted operating area are unstable operating areas, and the stable 1 operating area and stable 2 operating area are stable operating areas.

5. The method for counting time in the unstable area of ​​a hydropower unit according to claim 1, characterized in that: The time for calculating the hydropower unit to operate in the stable zone ; Calculate the time that the hydropower unit operates in the unstable area , specifically: If the operating condition of the hydropower unit is in the stable operating area, the collection period of the operating condition data The attribute is assigned to the stable zone running time , and perform statistical accumulation calculations; If the operating condition of the hydropower unit is in the unstable operating area, the collection period of the operating condition data The attribute is assigned to the running time of the unstable area , and statistically accumulate and calculate.

6. The method for calculating the time statistics of the unstable area of ​​a hydropower unit according to claim 1, characterized in that: The method further comprises: Output results, including runtime in unstable region Cumulative value, unstable zone running time At runtime The proportion of .

7. A time statistics device for unstable area of ​​hydropower unit, characterized in that: The device comprises: Data acquisition and processing module for: Obtain the operating data of the hydro-generator set; Preprocess the acquired working condition data, including: data table transfer, data value supplement, data frequency reduction and abnormal value screening; Data calculation module, used for: Obtain the operating area map of the hydropower unit; According to the hydropower unit operation area map, determine whether the operating condition of the hydropower unit is in the stable operation area or the unstable operation area; Calculate the time that the hydropower unit operates in the stable zone ; Calculate the time that the hydropower unit operates in the unstable area ; Calculate the running time, running time Running time in stable zone and unstable zone running time sum; Calculate the running time in the unstable region At runtime The proportion of .

8. The device for counting time in the unstable area of ​​a hydropower unit according to claim 7, characterized in that: The device also includes: Output modules for: Output results, including runtime in unstable region Cumulative value, unstable zone running time The percentage of running time.

9. A time statistics device for the unstable area of ​​a hydropower unit, characterized in that: The device comprises: Memory, used to store programs; A processor, configured to execute the program stored in the memory; when the program stored in the memory is executed, the processor is configured to execute the steps of the method as claimed in any one of claims 1 to 6.

10. A storage medium storing computer-readable instructions, wherein when the computer-readable instructions are executed by one or more processors, the one or more processors are caused to perform the steps of the method according to any one of claims 1 to 6.

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