Oil mist treatment method for water-turbine generator set

Abstract

The invention relates to the technical field of unit oil mist treatment, and discloses a water-turbine generator set oil mist treatment method which comprises the following steps: step 1, connecting a database, a compression tester, a liquid level sensor, a thermometer and a barometer through a network, acquiring equipment management data of the water-turbine generator set, operation data of the water-turbine generator set and sensing data of the water-turbine generator set, and classifying the data to form a data set; 2, estimating an oil throwing state of an oil groove in each water-turbine generator set, and generating an oil throwing index; 3, evaluating the performance of the oil groove sealing cover plate of each water-turbine generator set, and generating a sealing index; fourthly, performance evaluation is conducted on the sealing material of each water-turbine generator set, attenuation indexes are generated, and the multi-dimensional evaluation accuracy is high; and 5, an oil throwing threshold value, a sealing threshold value and an attenuation threshold value with fixed numerical values are set, then the oil throwing index, the sealing index and the attenuation index are combined, corresponding oil mist treatment suggestions are output, and the dynamic management treatment effect is good.

Description

Technical Field

[0001] This invention relates to the field of oil mist control technology for generator sets, specifically a method for controlling oil mist in hydro-generator sets. Background Technology

[0002] During the operation of a hydroelectric generator unit, the high-speed rotation of the main shaft agitates the turbine oil in the bearing oil grooves, generating oil mist. However, due to factors such as unreasonable internal bearing design, inadequate sealing of the oil grooves, and poor performance of the oil mist suction device, oil mist easily escapes from the oil grooves. Compared to ordinary units, the oil mist escape problem is more severe in high-speed units. As the unit's operating time increases, the oil mist accumulation phenomenon continues to worsen. Oil mist problems in hydroelectric generator units adversely affect the insulation performance and heat dissipation of critical components such as stator bars and rotors, thereby reducing the operational reliability of the equipment and increasing the workload of maintenance personnel in cleaning the equipment and walls. Given the complex and diverse causes of oil mist escape, the oil mist problem has become a significant challenge to the long-term safe and stable operation of hydroelectric units.

[0003] Currently, traditional oil mist control methods for hydro-generator units fail to fully consider the effects of temperature and pressure coupling, making it difficult to comprehensively cover factors such as equipment structure, operating conditions, and environmental disturbances. In addition, the lack of intelligent analysis mechanisms makes it difficult to adapt to the differentiated evaluation needs of different sealing units, resulting in poor oil mist control effects and persistently high leakage rates. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, the first objective of this invention is to provide a method for controlling oil mist in hydro-generator sets.

[0006] The second objective of this invention is to provide an oil mist control device for hydro-generator sets.

[0007] The third objective of this invention is to provide an electronic device.

[0008] The fourth objective of this invention is to provide a computer-readable storage medium.

[0009] The fifth objective of this invention is to provide a computer program product.

[0010] To achieve the above objectives, a first aspect of the present invention provides a method for controlling oil mist in a hydro-generator set, comprising:

[0011] Step 1: Connect to the database, compression tester, liquid level sensor, thermometer and barometer via network to obtain equipment management data, operation data and sensor data of the hydro-generator unit, and classify them into unit dataset, operation dataset and sensor dataset.

[0012] Step 2: Based on the unit dataset, operation dataset, and sensor dataset, estimate the oil slinging state of the oil tank inside each hydro-generator unit and generate the corresponding oil slinging index Syz.

[0013] Step 3: Based on the unit dataset, operation dataset, and sensor dataset, evaluate the performance of the oil tank sealing cover of each hydro-generator unit and generate the corresponding sealing index Mfz;

[0014] Step 4: Based on the unit dataset, operation dataset, and sensor dataset, evaluate the performance of the sealing material for each hydro-generator unit and generate the corresponding attenuation index Sjz;

[0015] Step 5: Set fixed values ​​for the oil splashing threshold SYY, sealing threshold MFY, and decay threshold SJY. Combine these with the oil splashing index Syz, sealing index Mfz, and decay index Sjz to output corresponding oil mist control recommendations.

[0016] Optionally, in step one, the generator set data includes the height of the oil baffle pipe of the hydro-generator set, the oil trough sealing type, the oil trough sealing gap, the area of ​​the oil trough sealing cover plate, the expansion coefficient of the oil trough sealing cover plate, and the tensile strength of the sealing material. The oil trough sealing type includes contact sealing and non-contact sealing.

[0017] Optionally, in step one, the running dataset includes the cumulative running time of the hydro-generator unit, the opening degree of the oil tank bleed valve, and the compression amount of the sealing material.

[0018] Optionally, in step one, the sensor dataset includes the oil level in the oil tank of the hydro-generator unit, the internal temperature of the oil tank, the internal air pressure of the oil tank, the ambient temperature, and the ambient air pressure.

[0019] Optionally, in step two, the calculation process for the oil spill index Syz is as follows:

[0020] Based on the generator set dataset, extract the equipment management data for the i-th hydro-generator unit and mark the oil baffle height of the i-th hydro-generator unit as dg. i The sealing gap of the oil tank of the i-th hydro-generator unit is marked as mj. i ;

[0021] Based on the operational dataset, extract the operational data of the i-th hydro-generator unit and label the cumulative operating time of the i-th hydro-generator unit as ly. i ;

[0022] Based on the sensor dataset, extract the sensor data of the i-th hydro-generator unit and mark the oil level in the oil tank of the i-th hydro-generator unit as yw. i ;

[0023] If the oil tank seal of the i-th hydro-generator unit is a contact seal, the oil sludge index Syz i for:

[0024]

[0025] In the formula, dg i -yw i This represents the height difference between the oil level in the oil baffle pipe and the oil level in the oil sump. BGC represents the standard value used to measure the height difference. α1 represents the weight of the ratio of the standard value to the height difference. BMJ represents the standard value used to measure the sealing clearance of the oil sump. α2 represents the weight of the ratio of the standard value to the sealing clearance of the oil sump. α3 represents the weight of the cumulative running time. α1, α2, and α3 are all constants, and α1 + α2 + α3 = 1. This represents the oil slinging index Syz of the oil tank inside the i-th hydro-generator unit, calculated according to the weights α1, α2, and α3. i ;

[0026] If the oil tank seal of the i-th hydro-generator unit is a non-contact seal, the oil sludge index Syz i for:

[0027]

[0028] In the formula, β1 represents the weight of the standard value and the height difference, β2 represents the weight of the ratio of the standard value to the oil sump sealing clearance, and β3 represents the weight of the cumulative running time. β1, β2, and β3 are all constants, and β1 + β2 + β3 = 1. This represents the oil slinging index Syz of the oil tank inside the i-th hydro-generator unit, calculated according to the weights β1, β2, and β3. i .

[0029] Optionally, in step three, the calculation process for the sealing index Mfz is as follows:

[0030] Based on the generator set dataset, the area of ​​the oil tank sealing cover plate of the i-th hydro-generator unit is marked as gm. i The coefficient of thermal expansion of the oil tank sealing cover is marked as px. i ;

[0031] Based on the operational dataset, the opening degree of the oil tank bleed air valve of the i-th hydro-generator unit is marked as fk. i ;

[0032] Based on the sensor dataset, the internal temperature of the oil tank of the i-th hydro-generator unit is labeled as nw. i The air pressure value inside the oil tank of the i-th hydro-generator unit is marked as ny. i Let hw be the ambient temperature of the i-th hydro-generator unit. i Let hy be the ambient air pressure value where the i-th hydro-generator unit is located. i ;

[0033] Sealing index Mfz i It is obtained through the following formula:

[0034] Δw i =|nw i -hw i |

[0035] Δy i =|ny i -hy i |

[0036]

[0037] In the formula, Δw i This indicates the temperature difference between the inside and outside of the oil tank sealing cover, expressed in gm. i ×Δw i ×px i This represents the amount of thermal deformation of the oil tank sealing cover due to the temperature difference between the inside and outside. BRB represents the standard value used to measure the amount of thermal deformation, ω1 represents the weight of the ratio of the standard value to the amount of thermal deformation, and Δy represents the amount of thermal deformation. i ω1 represents the pressure difference between the inside and outside of the oil tank sealing cover, ω2 represents the weight of the ratio of the internal and external pressure difference to the opening degree of the oil tank vent valve, and ω1 and ω2 are both constants. This indicates that the sealing index Mfz of the oil tank sealing cover of the i-th hydro-generator unit is calculated according to the weights ω1 and ω2. i .

[0038] Optionally, in step four, the calculation process for the attenuation index Sjz is as follows:

[0039] Based on the generator set dataset, the tensile strength of the sealing material of the i-th hydro-generator unit is denoted as cq. i ;

[0040] Based on the operational dataset, the compression amount of the sealing material for the i-th hydro-generator unit is denoted as ys. i ;

[0041] The attenuation index Sjz is obtained by the following formula:

[0042] Sjz i =θ1ly i +θ2nwi +θ3cq i +θ4ny i +θ5ys i

[0043] In the formula, θ1 represents the weight for cumulative running time, θ2 represents the weight for the internal temperature of the oil tank, θ3 represents the weight for the tensile strength of the sealing material, θ4 represents the weight for the internal air pressure of the oil tank, and θ5 represents the weight for the compression of the sealing material. θ1, θ2, θ3, θ4, and θ5 are all constants, and θ1 + θ2 + θ3 + θ4 + θ5 = 1, θ1ly i +θ2nw i +θ3cq i +θ4ny i +θ5ys i This indicates that the attenuation index Sjz of the sealing material of the i-th hydro-generator unit is calculated according to the weights θ1, θ2, θ3, θ4, and θ5. i .

[0044] Optionally, in step five, when the oil slinging index Syz ≥ the oil slinging threshold SYY, it indicates that the oil slinging phenomenon inside the oil tank of the hydro-generator unit is significant and the leakage rate is increasing. The opening of the oil tank venting valve should be adjusted in time and the oil level in the oil tank should be reduced.

[0045] Optionally, in step five, when the sealing index Mfz ≤ sealing threshold MFY, it indicates that the performance of the sealing cover plate of the hydro-generator oil tank has decreased and the leakage rate has increased. The temperature difference between the inside and outside of the oil tank and the air pressure difference between the inside and outside should be reduced in time.

[0046] Optionally, in step five, when the attenuation index Sjz ≥ attenuation threshold SJY, it indicates that the performance of the sealing material of the hydro-generator unit has decreased and the leakage rate has increased, and the sealing material should be replaced in time.

[0047] The technical solutions provided by the embodiments of the present invention bring at least the following beneficial effects:

[0048] 1. This invention acquires equipment management data, operational data, and sensor data of hydro-generator units by connecting to a database, compression tester, liquid level sensor, thermometer, and barometer via a network. These data are then categorized into unit datasets, operational datasets, and sensor datasets, comprehensively covering the influencing factors of oil mist leakage. Based on these datasets, the invention predicts the oil slinging state of the internal oil tank of each hydro-generator unit, generating a corresponding oil slinging index Syz. It flexibly adapts to oil tanks of hydro-generator units with different sealing methods, evaluates the performance of the sealing cover plate of each oil tank, and generates a corresponding sealing index Mfz. It also emphasizes the influence of temperature-pressure coupling effects, evaluating the performance of the sealing materials of each hydro-generator unit and generating a corresponding decay index Sjz. This accurately assesses the aging degree of the sealing materials, effectively preventing sealing problems caused by material failure. The multi-dimensional evaluation demonstrates high accuracy.

[0049] 2. This invention sets fixed values ​​for the oil-throwing threshold SYY, sealing threshold MFY, and attenuation threshold SJY, and combines them with the oil-throwing index Syz, sealing index Mfz, and attenuation index Sjz to construct a three-layer defense system from oil-throwing power, sealing structure integrity, and material life. This system accurately locates the root cause of leakage, outputs corresponding oil mist control suggestions, transforms complex faults into executable instructions, shortens the leakage response cycle, and achieves excellent dynamic management and control results.

[0050] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0051] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0052] Figure 1 This is a schematic flowchart of a method for controlling oil mist in a hydro-generator set provided in an embodiment of the present invention. Detailed Implementation

[0053] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0054] Traditional oil mist control methods for hydro-generator units fail to fully consider the effects of temperature and pressure coupling, making it difficult to comprehensively cover multiple factors such as equipment structure, operating conditions, and environmental disturbances. Furthermore, the lack of intelligent analysis mechanisms makes it difficult to adapt to the differentiated assessment needs of different sealing units, resulting in poor oil mist control effectiveness and persistently high leakage rates. Therefore, please refer to... Figure 1 This invention provides a method for controlling oil mist in a hydro-generator set, comprising the following steps:

[0055] Step 1: Connect to the database, compression tester, liquid level sensor, thermometer and barometer via network to acquire equipment management data, operation data and sensor data of the hydro-generator unit, and classify them into unit dataset, operation dataset and sensor dataset.

[0056] In this embodiment of the invention, the generator set dataset includes the height of the oil baffle pipe, the oil tank sealing type, the oil tank sealing gap, the area of ​​the oil tank sealing cover plate, the expansion coefficient of the oil tank sealing cover plate, and the tensile strength of the sealing material of the hydro-generator set. The oil tank sealing type includes contact sealing and non-contact sealing. The operation dataset includes the cumulative running time of the hydro-generator set, the opening degree of the oil tank vent valve, and the compression amount of the sealing material. The sensor dataset includes the oil level in the oil tank, the internal temperature of the oil tank, the internal air pressure of the oil tank, the ambient temperature, and the ambient air pressure of the hydro-generator set.

[0057] Specifically, this step integrates the static parameters, dynamic operating data, and real-time sensor data of key equipment in the hydro-generator unit, comprehensively covering the influencing factors of oil mist leakage and avoiding the limitations of a single data source.

[0058] Step 2: Based on the unit dataset, operation dataset, and sensor dataset, estimate the oil slinging state of the oil tank inside each hydro-generator unit and generate the corresponding oil slinging index Syz.

[0059] In this embodiment of the invention, the calculation process for the oil spill index Syz is as follows:

[0060] Based on the generator set dataset, extract the equipment management data for the i-th hydro-generator unit and mark the oil baffle height of the i-th hydro-generator unit as dg. i The sealing gap of the oil tank of the i-th hydro-generator unit is marked as mj. i ;

[0061] Based on the operational dataset, extract the operational data of the i-th hydro-generator unit and label the cumulative operating time of the i-th hydro-generator unit as ly. i ;

[0062] Based on the sensor dataset, extract the sensor data of the i-th hydro-generator unit and mark the oil level in the oil tank of the i-th hydro-generator unit as yw.i ;

[0063] If the oil tank seal of the i-th hydro-generator unit is a contact seal, the oil sludge index Syz i for:

[0064]

[0065] In the formula, dg i -yw i This represents the height difference between the oil level in the oil baffle pipe and the oil level in the oil sump. BGC represents the standard value used to measure the height difference. α1 represents the weight of the ratio of the standard value to the height difference. BMJ represents the standard value used to measure the sealing clearance of the oil sump. α2 represents the weight of the ratio of the standard value to the sealing clearance of the oil sump. α3 represents the weight of the cumulative running time. α1, α2, and α3 are all constants, and α1 + α2 + α3 = 1. This represents the oil slinging index Syz of the oil tank inside the i-th hydro-generator unit, calculated according to the weights α1, α2, and α3. i ;

[0066] If the oil tank seal of the i-th hydro-generator unit is a non-contact seal, the oil sludge index Syz i for:

[0067]

[0068] In the formula, β1 represents the weight of the standard value and the height difference, β2 represents the weight of the ratio of the standard value to the oil sump sealing clearance, and β3 represents the weight of the cumulative running time. β1, β2, and β3 are all constants, and β1 + β2 + β3 = 1. This represents the oil slinging index Syz of the oil tank inside the i-th hydro-generator unit, calculated according to the weights β1, β2, and β3. i .

[0069] This step dynamically adjusts the weight configuration to flexibly adapt to the oil tank of hydro-generator units with different sealing forms, and accurately quantifies the risk of oil spillage from the oil tank.

[0070] Step 3: Based on the unit dataset, operation dataset, and sensor dataset, evaluate the performance of the oil tank sealing cover of each hydro-generator unit and generate the corresponding sealing index Mfz.

[0071] In this embodiment of the invention, the calculation process for the sealing index Mfz is as follows:

[0072] Based on the generator set dataset, the area of ​​the oil tank sealing cover plate of the i-th hydro-generator unit is marked as gm. i The coefficient of thermal expansion of the oil tank sealing cover is marked as px. i ;

[0073] Based on the operational dataset, the opening degree of the oil tank bleed air valve of the i-th hydro-generator unit is marked as fk. i ;

[0074] Based on the sensor dataset, the internal temperature of the oil tank of the i-th hydro-generator unit is labeled as nw. i The air pressure value inside the oil tank of the i-th hydro-generator unit is marked as ny. i Let hw be the ambient temperature of the i-th hydro-generator unit. i Let hy be the ambient air pressure value where the i-th hydro-generator unit is located. i ;

[0075] Sealing index Mfz i It is obtained through the following formula:

[0076] Δw i =|nw i -hw i |

[0077] Δy i =|ny i -hy i |

[0078]

[0079] In the formula, Δw i This indicates the temperature difference between the inside and outside of the oil tank sealing cover, expressed in gm. i ×Δw i ×px i This represents the amount of thermal deformation of the oil tank sealing cover due to the temperature difference between the inside and outside. BRB represents the standard value used to measure the amount of thermal deformation, ω1 represents the weight of the ratio of the standard value to the amount of thermal deformation, and Δy represents the amount of thermal deformation. i ω1 represents the pressure difference between the inside and outside of the oil tank sealing cover, ω2 represents the weight of the ratio of the internal and external pressure difference to the opening degree of the oil tank vent valve, and ω1 and ω2 are both constants, and ω1 + ω2 = 1. This indicates that the sealing index Mfz of the oil tank sealing cover of the i-th hydro-generator unit is calculated according to the weights ω1 and ω2. i .

[0080] This step is based on the mechanism of leakage caused by cover plate deformation. By monitoring and evaluating the sealing performance of the oil tank sealing cover plate in real time, it effectively solves the problem of ignoring the influence of temperature and pressure coupling effect in traditional methods.

[0081] Step 4: Based on the unit dataset, operation dataset, and sensor dataset, evaluate the performance of the sealing material for each hydro-generator unit and generate the corresponding attenuation index Sjz.

[0082] In this embodiment of the invention, the calculation process for the attenuation index Sjz is as follows:

[0083] Based on the generator set dataset, the tensile strength of the sealing material of the i-th hydro-generator unit is denoted as cq. i ;

[0084] Based on the operational dataset, the compression amount of the sealing material for the i-th hydro-generator unit is denoted as ys. i ;

[0085] The attenuation index Sjz is obtained by the following formula:

[0086] Sjz i =θ1ly i +θ2nw i +θ3cq i +θ4ny i +θ5ys i

[0087] In the formula, θ1 represents the weight for cumulative running time, θ2 represents the weight for the internal temperature of the oil tank, θ3 represents the weight for the tensile strength of the sealing material, θ4 represents the weight for the internal air pressure of the oil tank, and θ5 represents the weight for the compression of the sealing material. θ1, θ2, θ3, θ4, and θ5 are all constants, and θ1 + θ2 + θ3 + θ4 + θ5 = 1, θ1ly i +θ2nw i +θ3cq i +θ4ny i +θ5ys i This indicates that the attenuation index Sjz of the sealing material of the i-th hydro-generator unit is calculated according to the weights θ1, θ2, θ3, θ4, and θ5. i .

[0088] This step comprehensively monitors multiple factors to accurately assess the aging degree of the sealing material, effectively preventing sealing problems caused by material failure. The multi-dimensional assessment has high accuracy.

[0089] Step 5: Set fixed values ​​for the oil splashing threshold SYY, sealing threshold MFY, and decay threshold SJY. Combine these with the oil splashing index Syz, sealing index Mfz, and decay index Sjz to output corresponding oil mist control recommendations.

[0090] It should be noted that when the oil spill index Syz ≥ the oil spill threshold SYY, it indicates that the oil spill phenomenon inside the oil tank of the hydro-generator unit is significant and the leakage rate is increasing. The opening of the oil tank vent valve should be adjusted in time and the oil level in the shaft oil tank should be reduced to effectively suppress oil mist leakage and reduce the risk of fire.

[0091] When the sealing index Mfz ≤ sealing threshold MFY, it indicates that the performance of the sealing cover of the oil tank of the hydro-generator unit has deteriorated and the leakage rate has increased. The temperature difference and air pressure difference between the inside and outside of the oil tank should be reduced in time. Automated diagnosis replaces manual inspection and effectively reduces downtime.

[0092] When the attenuation index Sjz ≥ attenuation threshold SJY, it indicates that the performance of the sealing material of the hydro-generator unit has declined and the leakage rate has increased. This serves as an early warning of material aging, and the sealing material should be replaced in a timely manner to avoid sudden leakage.

[0093] It is understandable that the oil spill threshold SYY, sealing threshold MFY, and attenuation threshold SJY are all set based on the operational practice of hydro-generator units. A unified judgment standard is established based on industry standards or historical data. Objective quantitative indicators replace subjective experience judgment, thereby improving the reliability of decision-making and reducing human error, resulting in good dynamic management and governance effects.

Claims

1. A method for controlling oil mist in a hydro-generator set, characterized in that, Includes the following steps: Step 1: Connect to the database, compression tester, liquid level sensor, thermometer and barometer via network to obtain equipment management data, operation data and sensor data of the hydro-generator unit, and classify them into unit dataset, operation dataset and sensor dataset. Step 2: Based on the unit dataset, operation dataset, and sensor dataset, estimate the oil slinging state of the oil tank inside each hydro-generator unit and generate the corresponding oil slinging index Syz. Step 3: Based on the unit dataset, operation dataset, and sensor dataset, evaluate the performance of the oil tank sealing cover of each hydro-generator unit and generate the corresponding sealing index Mfz; Step 4: Based on the unit dataset, operation dataset, and sensor dataset, evaluate the performance of the sealing material for each hydro-generator unit and generate the corresponding attenuation index Sjz; Step 5: Set fixed values ​​for the oil splashing threshold SYY, sealing threshold MFY, and decay threshold SJY. Combine these with the oil splashing index Syz, sealing index Mfz, and decay index Sjz to output corresponding oil mist control recommendations.

2. The method according to claim 1, characterized in that: In step one, the unit data set includes the height of the oil baffle pipe of the hydro-generator unit, the oil trough sealing form, the oil trough sealing gap, the area of ​​the oil trough sealing cover plate, the expansion coefficient of the oil trough sealing cover plate, and the tensile strength of the sealing material. The oil trough sealing form includes contact sealing and non-contact sealing.

3. The method according to claim 2, characterized in that: In step one, the running dataset includes the cumulative running time of the hydro-generator unit, the opening degree of the oil tank bleed valve, and the compression amount of the sealing material.

4. The method according to claim 3, characterized in that: In step one, the sensor dataset includes the oil level in the oil tank of the hydro-generator unit, the internal temperature of the oil tank, the internal air pressure of the oil tank, the ambient temperature, and the ambient air pressure.

5. The method according to claim 4, characterized in that: In step two, the calculation process for the oil-repellent index Syz is as follows: Based on the generator set dataset, extract the equipment management data for the i-th hydro-generator unit and mark the oil baffle height of the i-th hydro-generator unit as dg. i The sealing gap of the oil tank of the i-th hydro-generator unit is marked as mj. i ; Based on the operational dataset, extract the operational data of the i-th hydro-generator unit and label the cumulative operating time of the i-th hydro-generator unit as ly. i ; Based on the sensor dataset, extract the sensor data of the i-th hydro-generator unit and mark the oil level in the oil tank of the i-th hydro-generator unit as yw. i ; If the oil tank seal of the i-th hydro-generator unit is a contact seal, the oil sludge index Syz i for: In the formula, dg i -yw i This represents the height difference between the oil level in the oil baffle pipe and the oil level in the oil sump. BGC represents the standard value used to measure the height difference. α1 represents the weight of the ratio of the standard value to the height difference. BMJ represents the standard value used to measure the sealing clearance of the oil sump. α2 represents the weight of the ratio of the standard value to the sealing clearance of the oil sump. α3 represents the weight of the cumulative running time. α1, α2, and α3 are all constants, and α1 + α2 + α3 = 1. This represents the oil slinging index Syz of the oil tank inside the i-th hydro-generator unit, calculated according to the weights α1, α2, and α3. i ; If the oil tank seal of the i-th hydro-generator unit is a non-contact seal, the oil sludge index Syz i for: In the formula, β1 represents the weight of the standard value and the height difference, β2 represents the weight of the ratio of the standard value to the oil sump sealing clearance, and β3 represents the weight of the cumulative running time. β1, β2, and β3 are all constants. This represents the oil slinging index Syz of the oil tank inside the i-th hydro-generator unit, calculated according to the weights β1, β2, and β3. i .

6. The method according to claim 5, characterized in that: In step three, the calculation process for the sealing index Mfz is as follows: Based on the generator set dataset, the area of ​​the oil tank sealing cover plate of the i-th hydro-generator unit is marked as gm. i The coefficient of thermal expansion of the oil tank sealing cover is marked as px. i ; Based on the operational dataset, the opening degree of the oil tank bleed air valve of the i-th hydro-generator unit is marked as fk. i ; Based on the sensor dataset, the internal temperature of the oil tank of the i-th hydro-generator unit is labeled as nw. i The air pressure value inside the oil tank of the i-th hydro-generator unit is marked as ny. i Let hw be the ambient temperature of the i-th hydro-generator unit. i Let hy be the ambient air pressure value where the i-th hydro-generator unit is located. i ; Sealing index Mfz i It is obtained through the following formula: Δw i =|nw i -hw i | Δy i =|or i -hy i | In the formula, Δw i This indicates the temperature difference between the inside and outside of the oil tank sealing cover, expressed in gm. i ×Δw i ×px i This represents the amount of thermal deformation of the oil tank sealing cover due to the temperature difference between the inside and outside. BRB represents the standard value used to measure the amount of thermal deformation, ω1 represents the weight of the ratio of the standard value to the amount of thermal deformation, and Δy represents the amount of thermal deformation. i ω1 represents the pressure difference between the inside and outside of the oil tank sealing cover, ω2 represents the weight of the ratio of the internal and external pressure difference to the opening degree of the oil tank vent valve, and ω1 and ω2 are both constants. This indicates that the sealing index Mfz of the oil tank sealing cover of the i-th hydro-generator unit is calculated according to the weights ω1 and ω2. i .

7. The method according to claim 6, characterized in that: In step four, the calculation process for the attenuation index Sjz is as follows: Based on the generator set dataset, the tensile strength of the sealing material of the i-th hydro-generator unit is denoted as cq. i ; Based on the operational dataset, the compression amount of the sealing material for the i-th hydro-generator unit is denoted as ys. i ; The attenuation index Sjz is obtained by the following formula: Sjz i =θ1ly i +θ2nw i +θ3cq i +θ4ny i +θ5ys i In the formula, θ1 represents the weight for cumulative running time, θ2 represents the weight for the internal temperature of the oil tank, θ3 represents the weight for the tensile strength of the sealing material, θ4 represents the weight for the internal air pressure of the oil tank, and θ5 represents the weight for the compression of the sealing material. θ1, θ2, θ3, θ4, and θ5 are all constants, and θ1 + θ2 + θ3 + θ4 + θ5 = 1, θ1ly i +θ2nw i +θ3cq i +θ4ny i +θ5ys i This indicates that the attenuation index Sjz of the sealing material of the i-th hydro-generator unit is calculated according to the weights θ1, θ2, θ3, θ4, and θ5. i .

8. The method according to claim 7, characterized in that: In step five, when the oil spill index Syz ≥ the oil spill threshold SYY, it indicates that the oil spill phenomenon inside the oil tank of the hydro-generator unit is significant and the leakage rate is increasing. The opening of the oil tank vent valve should be adjusted in time and the oil level in the oil tank should be reduced.

9. The method according to claim 8, characterized in that: In step five, when the sealing index Mfz ≤ sealing threshold MFY, it indicates that the performance of the sealing cover of the oil tank of the hydro-generator unit has decreased and the leakage rate has increased. The temperature difference and air pressure difference between the inside and outside of the oil tank should be reduced in time.

10. The method according to claim 9, characterized in that: In step five, when the attenuation index Sjz ≥ attenuation threshold SJY, it indicates that the performance of the sealing material of the hydro-generator unit has decreased and the leakage rate has increased, and the sealing material should be replaced in time.

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