CN-121977753-A - Wind generating set gear oil leakage monitoring method and platform, medium and equipment

CN121977753ACN 121977753 ACN121977753 ACN 121977753ACN-121977753-A

Abstract

The application discloses a method, a platform, a medium and equipment for monitoring gear oil leakage of a wind generating set, wherein the method comprises the following steps: when the wind generating set operates, the oil level value is collected in real time through a magnetic float oil level sensor in the gear box, and after abnormal value removal and filtering treatment, the oil level variation minimum unit value is subtracted from the normal oil level candidate value. And judging whether the fluctuation range and the oil level change of the oil level are normal or not in a preset time period, and if the fluctuation range and the oil level change are normal, determining the minimum value in the candidate values as a normal oil level value on the same day. And if the difference value between the current filtered oil level value and the current normal oil level value or the current normal oil level value is larger than the preset oil level change threshold value, judging that oil leakage of gear oil occurs. On the premise of not changing the original actual running state of the wind generating set, the problem of misjudgment of oil leakage can be solved only by judging a logic optimization and a method for storing and recording the numerical value according to the numerical value change rule of the sensor under the condition of abnormal detection.

Inventors

YANG XUELI
KANG YAOHUI
YAN DEXIN
Wei Yuetao
WEI WANJUN

Assignees

国家电投集团黄河上游水电开发有限责任公司
青海黄河上游水电开发有限责任公司
青海黄河上游水电开发有限责任公司共和风力发电分公司

Dates

Publication Date: 20260505
Application Date: 20251212

Claims (10)

1. A method for monitoring gear oil leakage of a wind generating set, characterized in that the monitoring period is daily, the method comprising: When the wind generating set operates, the oil level value in the gear box is collected in real time through a magnetic float oil level sensor positioned in the gear box; Removing abnormal oil level values in the collected oil level values, and then performing filtering treatment to obtain filtered oil level values; Subtracting the minimum unit value of the oil level change from the filtered oil level value to obtain a normal oil level candidate value of the gear box when the wind generating set operates; the method comprises the steps of taking normal oil level candidate values in a sliding observation window as a group of normal oil level candidate value sequences, judging whether the fluctuation range of the normal oil level candidate values in a preset time period is normal or not and judging whether the oil level change of the normal oil level candidate values in the preset time period is normal or not based on a plurality of groups of normal oil level candidate value sequences in the preset time period, and determining the minimum normal oil level candidate value in the preset time period as the normal oil level value of the current day when judging that the fluctuation range and the oil level change of the normal oil level candidate values in the preset time period are normal; If the difference value between the normal oil level value determined on the current day and the current collected filtered oil level value is larger than a preset oil level change threshold value, or the difference value between the normal oil level value determined on the historical day and the current collected filtered oil level value is larger than a preset oil level change threshold value, judging that oil leakage of gear oil occurs, wherein the minimum value in the normal oil level values calculated in each preset time period in the historical day is the normal oil level value determined on the historical day.
2. The method according to claim 1, wherein the size and step size of the sliding observation window are set by a delay timer, and said judging whether the fluctuation range of the normal oil level candidate value within the preset period is normal includes: Judging whether the minimum normal oil level candidate value in each group of normal oil level candidate value sequences is kept unchanged in a preset time period; And when the oil level candidate value is maintained unchanged, the fluctuation range of the normal oil level candidate value sequence in the preset time period is normal, and otherwise, the fluctuation range of the normal oil level candidate value sequence in the preset time period is abnormal.
3. The method according to claim 1, wherein the determining whether the oil level change of the normal oil level candidate value within the preset time period is normal includes: counting the number of oil level rising and oil level falling times in the normal oil level candidate value sequences respectively through an oil level change counter aiming at any group of normal oil level candidate value sequences in a preset time period; When the number of times of oil level rising and oil level falling is larger than the respective number of times set a reference limit, and the difference value of the number of times of oil level rising and oil level falling is smaller than or equal to a preset difference value threshold, the oil level change displayed by the normal oil level candidate value sequence is normal, otherwise, the oil level change is abnormal; When the oil level changes of all the normal oil level candidate value sequences in the preset time period are normal, the oil level changes of the normal oil level candidate values in the preset time period are normal, otherwise, the oil level changes of the normal oil level candidate values in the preset time period are abnormal.
4. The method of claim 1, wherein after determining that a gear oil leak has occurred, the method further comprises: And controlling the gearbox lubrication pump or the wind generating set to stop working.
5. The method according to claim 1, wherein the filtering process is performed after removing the abnormal oil level value from the collected oil level values, and the method includes, after obtaining the filtered oil level value: Inquiring whether a normal oil level value is determined on the same day; correspondingly, subtracting the minimum unit value of the oil level change from the filtered oil level value to obtain a normal oil level candidate value of the gear box when the wind generating set operates, wherein the method comprises the following steps of: If the normal oil level value is not determined in the same day, subtracting the minimum unit value of the oil level change from the filtered oil level value to obtain a normal oil level candidate value of the gear box when the wind generating set operates; correspondingly, if the difference between the normal oil level value determined on the current day and the current collected filtered oil level value is greater than a preset oil level change threshold, or the difference between the normal oil level value determined on the historical day and the current collected filtered oil level value is greater than a preset oil level change threshold, judging that oil leakage of gear oil occurs, including: If the normal oil level value is determined on the same day, calculating the difference value between the determined normal oil level value and the current collected oil level value after filtering, and calculating the difference value between the normal oil level value determined on the historical day and the current collected oil level value after filtering; And judging that the gear oil leaks if the difference between the normal oil level value determined on the current day and the current collected filtered oil level value is larger than a preset oil level change threshold value or the difference between the normal oil level value determined on the historical day and the current collected filtered oil level value is larger than the preset oil level change threshold value.
6. The method according to any one of claims 1 to 5, further comprising: When the normal oil level values of all the days are different from each other in three consecutive days, taking the intermediate value in the different normal oil level values as the normal oil level value determined by the history day; When the normal oil level values of the respective days are not mutually unequal within three consecutive days, the maximum value of the normal oil level values which are not mutually unequal is taken as the normal oil level value determined on the history day.
7. The method of claim 6, wherein the method further comprises: if the day is over and the normal oil level value is determined on the same day, the normal oil level value on the same day is cleared, and the normal oil level value in the past three days is sequentially and repeatedly updated by taking three days as a normal oil level value replacement period.
8. A wind generating set gear oil leakage monitoring platform, wherein the monitoring period is daily, the platform includes: The oil level value real-time acquisition module is used for acquiring the oil level value in the gear box in real time through a magnetic float oil level sensor positioned in the gear box when the wind generating set operates; the oil level value real-time filtering module is used for filtering after removing the abnormal oil level value in the collected oil level values to obtain filtered oil level values; the normal oil level candidate value determining module is used for subtracting the minimum unit value of the oil level change from the filtered oil level value to obtain the normal oil level candidate value of the gear box when the wind generating set operates; A normal oil level value determining module, configured to determine whether a fluctuation range of the normal oil level candidate value in a preset time period is normal or not and whether an oil level change of the normal oil level candidate value in the preset time period is normal or not based on a plurality of sets of normal oil level candidate value sequences in the preset time period, and determine a minimum normal oil level value candidate value in the preset time period as a normal oil level value on the same day when it is determined that the fluctuation range and the oil level change of the normal oil level candidate value in the preset time period are both normal; The gear oil leakage detection module is used for judging that oil leakage of the gear oil occurs if the difference value between the normal oil level value determined on the current day and the current collected filtered oil level value is larger than a preset oil level change threshold value or the difference value between the normal oil level value determined on the historical day and the current collected filtered oil level value is larger than a preset oil level change threshold value, wherein the minimum value in the normal oil level values calculated in each preset time period in the historical day is the normal oil level value determined on the historical day.
9. A medium having stored thereon a computer program, which when executed by a processor, implements a method of monitoring a wind park gear oil leakage according to any of claims 1 to 7.
10. An apparatus comprising a medium, a processor and a computer program stored on the medium and executable on the processor, wherein the processor implements the method of monitoring the oil leakage of a wind turbine generator system gear according to any one of claims 1 to 7 when the computer program is executed by the processor.

Description

Wind generating set gear oil leakage monitoring method and platform, medium and equipment Technical Field The application relates to the technical field of state monitoring of wind power generation equipment, in particular to a method, a platform, a medium and equipment for monitoring gear oil leakage of a wind power generator set. Background The oil leakage of equipment is a typical problem in the mechanical industry, and industrial equipment with lubrication is easy to run, overflow, drip, leak and the like. The design of part of the machine types in the wind generating set adopts a gear box as a speed-increasing transmission part of the machine, and the gear box also has the phenomenon of oil leakage in long-term operation. The leakage oil of the wind generating set mainly comprises design problems, manufacturing process problems, equipment installation problems, operation or maintenance misoperation of operation and maintenance personnel, loosening of a part joint surface, ageing and fracture of a sealing ring and the like caused by bad working conditions of a lubrication platform. At present, the oil seepage problem of a gear box lubrication platform is very common, the regular inspection and plugging of the gear box lubrication platform is usually maintained, and meanwhile, the oil receiving groove is designed to be cleaned regularly, so that the plugging and prevention are combined. The probability of oil leakage of the gearbox lubrication platform is relatively low, but the influence is serious, once large economic loss is caused, for oil leakage detection, oil leakage judgment is generally carried out by using methods such as an oil tank analog oil level sensor, an oil tank switching value oil level low sensor, detecting oil medium on an oil leakage bearing surface by using a proximity switch, and the like. The magnetic float oil level sensor is one kind of wind power generator set oil level analog quantity detecting method, and the sensor consists of mainly floats, guide rods and guide rod end detecting device. The existing wind generating set with a gear box can use a magnetic float oil level sensor to measure the real-time oil level and monitor the change of the oil level, and after the wind generating set is operated for a long time, the appearance of gear lubricating oil can change, the color of the gear lubricating oil becomes deep and mixed to generate emulsification, obvious abrasive particles, mechanical impurities and oil sludge are generated, the viscosity of the lubricating oil can be increased due to the oil sludge generated by oil oxidation and emulsification, floats on the sensor can change slowly and even are blocked, and the generated mechanical impurities and iron skips can also cause the blocking of the floats to influence the oil level detection and further influence the oil leakage judgment. Disclosure of Invention In view of the above, the application provides a method, a platform, a medium and equipment for monitoring oil leakage of a gear of a wind generating set, which can solve the problem of misjudgment of oil leakage only by judging a logic optimization and a numerical storage record method according to the numerical change rule of a sensor under the condition of abnormal detection on the premise of not changing the original actual running state of the wind generating set. According to one aspect of the application, there is provided a method for monitoring gear oil leakage of a wind generating set, the method comprising: When the wind generating set operates, the oil level value in the gear box is collected in real time through a magnetic float oil level sensor positioned in the gear box; Removing abnormal oil level values in the collected oil level values, and then performing filtering treatment to obtain filtered oil level values; Subtracting the minimum unit value of the oil level change from the filtered oil level value to obtain a normal oil level candidate value of the gear box when the wind generating set operates; the method comprises the steps of taking normal oil level candidate values in a sliding observation window as a group of normal oil level candidate value sequences, judging whether the fluctuation range of the normal oil level candidate values in a preset time period is normal or not and judging whether the oil level change of the normal oil level candidate values in the preset time period is normal or not based on a plurality of groups of normal oil level candidate value sequences in the preset time period, and determining the minimum normal oil level candidate value in the preset time period as the normal oil level value of the current day when judging that the fluctuation range and the oil level change of the normal oil level candidate values in the preset time period are normal; If the difference value between the normal oil level value determined on the current day and the current collected filtered oil level value is larger than a preset oil leve