Fault diagnosis method, device and equipment for water cooling system of wind turbine generator and storage medium

Abstract

The invention discloses a wind turbine generator water-cooling system fault diagnosis method, device and equipment and a storage medium, and relates to the technical field of wind power generation, and the method comprises the steps: obtaining historical unit operation data of a target wind turbine generator water-cooling system to determine target operation data; utilizing a preset linear regression algorithm and the target operation data to construct an incidence relation between the operation pressure and the operation temperature; the standard operation intercept and the standard operation slope of the target wind turbine generator water cooling system are determined based on the incidence relation; obtaining current operation data of the target wind turbine generator water cooling system, and determining a current operation intercept and a current operation slope based on the current operation data, a preset temperature and pressure calculation method, the standard operation intercept and the standard operation slope; and determining the current operation state of the target wind turbine generator water-cooling system based on the current operation intercept and the current operation slope so as to complete fault diagnosis of the target wind turbine generator water-cooling system. Therefore, accurate diagnosis and timely early warning of faults of the water cooling system can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a method, device, equipment and storage medium for diagnosing faults in a water cooling system of a wind turbine generator set. Background Art

[0002] Offshore wind turbines are usually installed in harsh marine environments and face extreme conditions such as high humidity, high salt spray, and strong winds, which puts higher requirements on the reliability and stability of the units. As an important part of offshore wind turbines, the normal operation of the water cooling system is crucial to ensuring the performance and safety of the units. The water cooling system of offshore wind turbines is mainly used to cool key components such as generators, gearboxes, and converters to prevent them from being damaged by overheating during operation. The water cooling system usually consists of a water pump, a radiator, cooling pipes, an expansion tank, a sensor, etc. During normal operation, the water pump transports the coolant to each component that needs to be cooled. After absorbing heat, the coolant dissipates the heat to the surrounding environment through the radiator, thereby realizing a cooling cycle. Once a water cooling system fails, it will have a serious impact on the operation of offshore wind turbines. For example, if the water pump fails and the coolant cannot circulate normally, components such as generators and converters will heat up rapidly, which may cause equipment damage or even safety accidents such as fires. In addition, faults such as radiator blockage, cooling pipe leakage, base pressure that is too high or too low, and abnormal expansion tank pressure regulation will also affect the cooling effect, reduce the power generation efficiency of the unit, and increase maintenance costs and downtime.

[0003] Traditional water cooling system fault diagnosis methods mainly rely on manual inspections and regular maintenance, but this method has many limitations. First, manual inspections make it difficult to monitor the operating status of the water cooling system in real time and fail to detect potential fault hazards in a timely manner. Second, regular maintenance requires downtime, which will cause a loss of power generation, and some intermittent faults may not be detected during maintenance. In addition, traditional fault diagnosis methods often rely on experience and simple test equipment, with low diagnostic accuracy and efficiency, and it is difficult to meet the reliability and stability requirements of offshore wind turbines. Therefore, how to accurately diagnose water cooling system faults needs to be solved. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a wind turbine water cooling system fault diagnosis method, device, equipment and storage medium, which can realize accurate diagnosis and timely warning of water cooling system faults. The specific scheme is as follows:

[0005] In a first aspect, the present application discloses a method for diagnosing a fault in a water cooling system of a wind turbine generator set, comprising:

[0006] Acquire historical unit operation data of a target wind turbine water cooling system, and determine target operation data in which the main state machine state of the wind turbine is a grid-connected state from the historical unit operation data;

[0007] Using a preset linear regression algorithm and the target operating data to construct a correlation between the operating pressure and the operating temperature of the water cooling system of the target wind turbine generator set;

[0008] Determine a standard operation intercept and a standard operation slope of the target wind turbine water cooling system based on the association relationship;

[0009] Acquire current operating data of the target wind turbine water cooling system, and determine a current operating intercept and a current operating slope corresponding to the current operating data based on the current operating data, a preset temperature and pressure calculation method, the standard operating intercept and the standard operating slope;

[0010] The current operating state of the target wind turbine water cooling system is determined based on the current operating intercept and the current operating slope to complete the fault diagnosis of the target wind turbine water cooling system.

[0011] Optionally, the acquiring of historical unit operation data of a target wind turbine water cooling system, and determining target operation data in which the main state machine state of the wind turbine is a grid-connected state from the historical unit operation data, includes:

[0012] Collect historical unit operation data of the target wind turbine water cooling system within a preset time period, and determine the initial operation data of the wind turbine main state machine state being the grid-connected state from the historical unit operation data;

[0013] The abnormal data in the initial operation data is eliminated through a data comparison operation to obtain the target operation data of the target wind turbine set water cooling system under normal operation.

[0014] Optionally, the using a preset linear regression algorithm and the target operating data to construct a correlation relationship between the operating pressure and the operating temperature of the target wind turbine water cooling system includes:

[0015] The target operation data are processed by using a preset linear regression algorithm to obtain a first linear relationship between a cabin water cooling system gearbox outlet pressure and a cabin water cooling system gearbox outlet temperature in the target wind turbine unit water cooling system, a second linear relationship between a cabin environmental control water pump inlet coolant pressure and a cabin environmental control water pump inlet coolant temperature, and a third linear relationship between a tower base water cooling pump inlet water pressure and a tower bottom water cooling system outlet temperature;

[0016] Accordingly, determining the standard operation intercept and the standard operation slope of the target wind turbine water cooling system based on the association relationship includes:

[0017] Determine a cabin operation standard intercept and a cabin operation standard slope in the target wind turbine water cooling system based on the first linear relationship;

[0018] Determine the standard intercept and the standard slope of the environmental control operation in the water cooling system of the target wind turbine generator set based on the second linear relationship;

[0019] Based on the third linear relationship, a tower base operation standard intercept and a tower base operation standard slope in the target wind turbine water cooling system are determined.

[0020] Optionally, the acquiring current operating data of the target wind turbine water cooling system, and determining a current operating intercept and a current operating slope corresponding to the current operating data based on the current operating data, a preset temperature and pressure calculation method, the standard operating intercept, and the standard operating slope, respectively, includes:

[0021] Acquire current operating data of the target wind turbine water cooling system;

[0022] Determine the corresponding current operation intercept based on the temperature data and pressure data in the current operation data, the intercept calculation formula in the preset temperature and pressure calculation method, and the standard operation slope;

[0023] The corresponding current operation slope is determined based on the temperature data and the pressure data, the slope calculation formula in the preset temperature and pressure calculation method, and the standard operation intercept.

[0024] Optionally, the determining the corresponding current operation intercept based on the temperature data and pressure data in the current operation data, the intercept calculation formula in the preset temperature and pressure calculation method, and the standard operation slope includes:

[0025] Determine a first operation intercept corresponding to the nacelle in the target wind turbine water cooling system based on the temperature data and pressure data in the current operation data, the intercept calculation formula in the preset temperature and pressure calculation method, and the nacelle operation standard slope;

[0026] Determine a second operation intercept corresponding to the environmental control in the water cooling system of the target wind turbine generator set based on the temperature data and the pressure data, the intercept calculation formula and the environmental control operation standard slope;

[0027] The third operation intercept corresponding to the tower base in the water cooling system of the target wind turbine generator set is determined based on the temperature data and the pressure data, the intercept calculation formula and the tower base operation standard slope.

[0028] Optionally, the determining the corresponding current operation slope based on the temperature data and the pressure data, the slope calculation formula in the preset temperature and pressure calculation method, and the standard operation intercept includes:

[0029] Determine a first operation slope corresponding to the cabin based on the temperature data and the pressure data, a slope calculation formula in a preset temperature and pressure calculation method, and the cabin operation standard intercept;

[0030] Determine a second operation slope corresponding to the environmental control based on the temperature data and the pressure data, the slope calculation formula and the environmental control operation standard intercept;

[0031] A third operation slope corresponding to the tower foundation is determined based on the temperature data and the pressure data, the slope calculation formula and the tower foundation operation standard intercept.

[0032] Optionally, determining the current operating state of the target wind turbine water cooling system based on the current operating intercept and the current operating slope to complete fault diagnosis of the target wind turbine water cooling system includes:

[0033] Based on a preset basic pressure fault coefficient, the first operation intercept is compared with the corresponding cabin operation standard intercept to obtain a pressure fault state of the cabin, and a water cooling pipeline fault state of the cabin is determined based on a change trend of the first operation intercept;

[0034] Based on the preset basic pressure fault coefficient, the second operation intercept is compared with the corresponding standard intercept of the environmental control operation to obtain the pressure fault state of the environmental control, and the water cooling pipeline fault state of the environmental control is determined based on the change trend of the second operation intercept;

[0035] Based on the preset basic pressure failure coefficient, the third operation intercept is compared with the corresponding tower base operation standard intercept to obtain the pressure failure state of the tower base, and the water cooling pipeline failure state of the tower base is determined based on the change trend of the third operation intercept;

[0036] Based on a preset expansion tank failure coefficient, comparing the first operation slope with a corresponding cabin operation standard slope to obtain an abnormal state of a water-cooled expansion tank of the cabin;

[0037] Based on the preset expansion tank fault coefficient, the second operation slope is compared with the corresponding environmental control operation standard slope to obtain the abnormal state of the water-cooled expansion tank of the environmental control

[0038] Based on the preset expansion tank failure coefficient, the third operation slope is compared with the corresponding tower base operation standard slope to obtain the abnormal state of the water-cooled expansion tank of the tower base.

[0039] In a second aspect, the present application discloses a wind turbine water cooling system fault diagnosis device, comprising:

[0040] An operation data acquisition module is used to acquire historical unit operation data of a target wind turbine unit water cooling system, and determine target operation data in which the main state machine state of the wind turbine is a grid-connected state from the historical unit operation data;

[0041] A correlation determination module, used to construct a correlation between the operating pressure and the operating temperature of the water cooling system of the target wind turbine generator set by using a preset linear regression algorithm and the target operating data;

[0042] An operation data confirmation module, used to determine a standard operation intercept and a standard operation slope of the target wind turbine water cooling system based on the association relationship;

[0043] A current data processing module, used to obtain current operating data of the target wind turbine water cooling system, and determine the current operating intercept and the current operating slope corresponding to the current operating data based on the current operating data, a preset temperature and pressure calculation method, the standard operating intercept and the standard operating slope;

[0044] A system fault diagnosis module is used to determine the current operating state of the target wind turbine water cooling system based on the current operating intercept and the current operating slope to complete the fault diagnosis of the target wind turbine water cooling system.

[0045] In a third aspect, the present application discloses an electronic device, including:

[0046] Memory, used to store computer programs;

[0047] A processor is used to execute the computer program to implement the aforementioned wind turbine water cooling system fault diagnosis method.

[0048] In a fourth aspect, the present application discloses a computer-readable storage medium for storing a computer program, wherein the computer program, when executed by a processor, implements the aforementioned wind turbine water cooling system fault diagnosis method.

[0049] It can be seen that in the present application, the historical unit operation data of the target wind turbine water cooling system is obtained, and the target operation data in which the main state machine state of the wind turbine is the grid-connected state is determined from the historical unit operation data; the correlation relationship between the operation pressure and the operation temperature of the target wind turbine water cooling system is constructed using a preset linear regression algorithm and the target operation data; the standard operation intercept and the standard operation slope of the target wind turbine water cooling system are determined based on the correlation relationship; the current operation data of the target wind turbine water cooling system is obtained, and the current operation intercept and the current operation slope corresponding to the current operation data are respectively determined based on the current operation data, the preset temperature and pressure calculation method, the standard operation intercept and the standard operation slope; the current operation state of the target wind turbine water cooling system is determined based on the current operation intercept and the current operation slope to complete the fault diagnosis of the target wind turbine water cooling system. By adopting the main state machine state of the offshore wind turbine, the inlet and outlet temperatures and pressures of the water cooling systems of different components, and then combining the temperature, pressure of the water cooling system, and the operating status of the wind turbine unit through big data analysis, it is concluded that there is an inherent mechanism between the three, and at the same time, the warning trigger strategy of the over-limit threshold and the over-limit duration ratio is used to timely provide early fault warning and cause diagnosis for abnormal water cooling systems of wind turbine units. That is, by using the linear regression algorithm to calculate the linear relationship between the temperature and pressure of the water cooling system in a healthy state, and detecting the operating status of the water cooling system of the target wind turbine unit through the linear relationship, the fault status of the water cooling system of the target wind turbine unit can be accurately judged in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0051] Figure 1 A flow chart of a wind turbine water cooling system fault diagnosis method disclosed in the present application;

[0052] Figure 2 A schematic diagram of data showing leakage points in pipelines at corresponding locations of a specific water cooling system disclosed in the present application;

[0053] Figure 3 A schematic diagram of insufficient water-cooling liquid data for a specific water-cooling system disclosed in the present application;

[0054] Figure 4 A schematic diagram of abnormal data of a tower base expansion tube corresponding to a specific water cooling system disclosed in the present application;

[0055] Figure 5 A flow chart of a specific wind turbine water cooling system fault diagnosis method disclosed in this application;

[0056] Figure 6 This is a schematic diagram of the structure of a wind turbine water cooling system fault diagnosis device disclosed in this application;

[0057] Figure 7 This is a structural diagram of an electronic device disclosed in this application. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0059] Traditional water cooling system fault diagnosis methods mainly rely on manual inspection and regular maintenance, but this method has many limitations. This application will specifically introduce a wind turbine water cooling system fault diagnosis method that can accurately diagnose and timely warn of water cooling system faults.

[0060] See also Figure 1 As shown, the embodiment of the present application discloses a method for diagnosing faults in a water cooling system of a wind turbine generator set, comprising:

[0061] Step S11: acquiring historical unit operation data of a target wind turbine water cooling system, and determining target operation data in which the main state machine state of the wind turbine is a grid-connected state from the historical unit operation data.

[0062] In this embodiment, based on the historical unit operation data of the target wind turbine water cooling system, the target operation data of the main state machine state of the wind turbine is determined to be the grid-connected state. Specifically, the historical unit operation data of the target wind turbine water cooling system within a preset time period is collected, and the initial operation data of the main state machine state of the wind turbine is determined from the historical unit operation data; the abnormal data in the initial operation data is eliminated through data comparison operation to obtain the target operation data of the water cooling system of the target wind turbine under normal operation. That is, the operation data of the unit collected for one year specifically includes the gearbox outlet pressure of the cabin water cooling system, the gearbox outlet temperature of the cabin water cooling system, the coolant pressure of the cabin environmental control water pump inlet, the coolant temperature of the cabin environmental control water pump inlet, the water pressure of the water cooling pump under the tower, the outlet temperature of the boost transformer 2 of the water cooling system under the tower, and the main state machine state. Then, according to the collected data, the data of the main state machine state being the grid-connected power generation state is screened out, and the abnormal data is eliminated by comparing the data of multiple units to ensure that the screened data is the data of the healthy operation state of the unit to obtain the target operation data. Among them, the data set composed of the monitoring data collected during the operation of the wind turbine is set to X={X1, X2, X3, X4, X5, X6}, where X1 is the gearbox outlet pressure of the cabin water cooling system, X2 is the gearbox outlet temperature of the cabin water cooling system, X3 is the inlet coolant pressure of the cabin environmental control water pump, X3 is the inlet coolant temperature of the cabin environmental control water pump, X4 is the inlet water pressure of the water cooling pump under the tower, X5 is the outlet temperature of the boost transformer 2 of the water cooling system under the tower, and X6 is the main state machine state, so as to realize real-time monitoring, early warning and fault diagnosis of the water cooling system.

[0063] Step S12: constructing a correlation between the operating pressure and the operating temperature of the target wind turbine water cooling system by using a preset linear regression algorithm and the target operating data.

[0064] In this embodiment, the association between the operating pressure and the operating temperature of the target wind turbine water cooling system is constructed by using a preset linear regression algorithm and the target operating data, including: using a preset linear regression algorithm to process the target operating data to obtain a first linear relationship between the gearbox outlet pressure of the cabin water cooling system and the gearbox outlet temperature of the cabin water cooling system in the target wind turbine water cooling system, a second linear relationship between the inlet coolant pressure of the cabin environmental control water pump and the inlet coolant temperature of the cabin environmental control water pump, and a third linear relationship between the inlet water pressure of the tower base water cooling pump and the outlet temperature of the water cooling system under the tower. That is, first, when the wind turbine is in a grid-connected power generation state, the target operating data is calculated by using a linear regression algorithm to obtain a first linear relationship between the outlet pressure V1 of the gearbox of the cabin water cooling system and the outlet temperature T1 of the gearbox of the cabin water cooling system; a second linear relationship between the inlet coolant pressure V2 of the cabin environmental control water pump and the inlet coolant temperature T2 of the cabin environmental control water pump; and a third linear relationship between the inlet water pressure V3 of the tower base water cooling pump and the outlet temperature T3 of the boost transformer 2 of the water cooling system under the tower.

[0065] Step S13: determining a standard operation intercept and a standard operation slope of the target wind turbine water cooling system based on the association relationship.

[0066] In this embodiment, after the first linear relationship, the second linear relationship and the third linear relationship are calculated respectively, the standard intercept and the standard slope of the cabin operation in the water cooling system of the target wind turbine are determined based on the first linear relationship; the standard intercept and the standard slope of the environmental control operation in the water cooling system of the target wind turbine are determined based on the second linear relationship; the standard intercept and the standard slope of the tower base operation in the water cooling system of the target wind turbine are determined based on the third linear relationship. That is, the corresponding standard operation slope and the standard operation intercept are determined according to the linear relationship formula. Specifically, based on the first linear relationship between the gearbox outlet pressure V1 of the cabin water cooling system and the gearbox outlet temperature T1 of the cabin water cooling system, the slope k1 and the intercept b1 are obtained; based on the second linear relationship between the inlet coolant pressure V2 of the cabin environmental control water pump and the inlet coolant temperature T2 of the cabin environmental control water pump, the slope k2 and the intercept b2 are obtained; based on the third linear relationship between the inlet water pressure V3 of the tower base water cooling pump and the outlet temperature T3 of the boost transformer 2 of the water cooling system under the tower, the slope k3 and the intercept b3 are obtained.

[0067] Step S14: obtaining current operating data of the target wind turbine water cooling system, and determining a current operating intercept and a current operating slope corresponding to the current operating data based on the current operating data, a preset temperature and pressure calculation method, the standard operating intercept and the standard operating slope.

[0068] In this embodiment, the current operating data of the target wind turbine water cooling system is obtained, and the current operating intercept and the current operating slope corresponding to the current operating data are respectively determined based on the current operating data, the preset temperature and pressure calculation method, the standard operating intercept and the standard operating slope, including: obtaining the current operating data of the target wind turbine water cooling system; determining the corresponding current operating intercept based on the temperature data and pressure data in the current operating data, the intercept calculation formula in the preset temperature and pressure calculation method, and the standard operating slope; determining the corresponding current operating slope based on the temperature data and the pressure data, the slope calculation formula in the preset temperature and pressure calculation method, and the standard operating intercept.

[0069] Among them, the determining of the corresponding current operation intercept based on the temperature data and pressure data in the current operation data, the intercept calculation formula in the preset temperature and pressure calculation method, and the standard operation slope includes: determining the first operation intercept corresponding to the cabin in the water cooling system of the target wind turbine generator set based on the temperature data and pressure data in the current operation data, the intercept calculation formula in the preset temperature and pressure calculation method, and the cabin operation standard slope; determining the second operation intercept corresponding to the environmental control in the water cooling system of the target wind turbine generator set based on the temperature data and the pressure data, the intercept calculation formula and the environmental control operation standard slope; determining the third operation intercept corresponding to the tower base in the water cooling system of the target wind turbine generator set based on the temperature data and the pressure data, the intercept calculation formula and the tower base operation standard slope. Specifically, through k1, b1, k2, b2, k3, b3, using the calculation relationship between temperature and pressure in the water cooling system: operating intercept (B) = pressure (V) - (k×temperature (T)), then the cabin operation standard intercept (B1) = V1-k1×T1; the environmental control operation standard intercept (B2) = V2-k2*T2; the tower base operation standard intercept (B3) = V3-k3×T3.

[0070] Among them, the determining the corresponding current operating slope based on the temperature data and the pressure data, the slope calculation formula in the preset temperature and pressure calculation method, and the standard operating intercept includes: determining the first operating slope corresponding to the cabin based on the temperature data and the pressure data, the slope calculation formula in the preset temperature and pressure calculation method, and the cabin operation standard intercept; determining the second operating slope corresponding to the environmental control based on the temperature data and the pressure data, the slope calculation formula, and the environmental control operation standard intercept; determining the third operating slope corresponding to the tower base based on the temperature data and the pressure data, the slope calculation formula, and the tower base operation standard intercept. Specifically, by obtaining k1, b1, k2, b2, k3, and b3, and using the calculation relationship between temperature and pressure in the water cooling system: operating slope (K) = (pressure (V) - b) / T, then the cabin operating standard slope (K1) = (V1-b1) / T1; the environmental control operating standard slope (K2) = (V2-b2) / T2; the tower base operating standard slope (K3) = (V3-b3) / T3.

[0071] Step S15: determining the current operating state of the target wind turbine water cooling system based on the current operating intercept and the current operating slope to complete fault diagnosis of the target wind turbine water cooling system.

[0072] Determining the current operating state of the water-cooling system of the target wind turbine based on the current operating intercept and the current operating slope to complete the fault diagnosis of the water-cooling system of the target wind turbine, including: comparing the first operating intercept with the corresponding nacelle operating standard intercept based on a preset basic pressure fault coefficient to obtain the pressure fault state of the nacelle, and determining the water-cooling pipeline fault state of the nacelle based on the change trend of the first operating intercept; comparing the second operating intercept with the corresponding environmental control operating standard intercept based on the preset basic pressure fault coefficient to obtain the pressure fault state of the environmental control, and determining the water-cooling pipeline fault state of the environmental control based on the change trend of the second operating intercept; comparing the third operating intercept with the corresponding tower base operating standard intercept based on the preset basic pressure fault coefficient to obtain the pressure fault state of the tower base, and determining the water-cooling pipeline fault state of the tower base based on the change trend of the third operating intercept. That is, through the operating intercepts B1, B2, and B3, when B1 > m × b1, it is determined that the basic pressure of the nacelle water-cooling is high; when B2 > m × b2, it is determined that the basic pressure of the environmental control water-cooling is high; when B3 > m × b3, it is determined that the basic pressure of the tower base water-cooling is low; when B1 < n × b1, it is determined that the basic pressure of the nacelle water-cooling is low; when B2 < n × b2, it is determined that the basic pressure of the environmental control water-cooling is low; when B3 < n × b3, it is determined that the basic pressure of the tower base water-cooling is low, where m and n are basic pressure fault coefficients. Further, count the operating intercepts (B) of the corresponding parts (nacelle, environmental control, tower base) of the units with low pressure in the previous week. If the intercept shows a monotonically decreasing trend, it is determined that there is a leak in the pipeline of the corresponding part of the water-cooling system. As Figure 2 shown, if there is no monotonically decreasing trend, it is determined that the water-cooling liquid in the corresponding part of the water-cooling system is too little. As Figure 3 shown.

[0073] In this embodiment, based on a preset expansion tank fault coefficient, the first operating slope is compared with the corresponding standard operating slope of the engine nacelle to obtain the abnormal state of the water-cooled expansion tank of the engine nacelle; based on the preset expansion tank fault coefficient, the second operating slope is compared with the corresponding standard operating slope of the environmental control system to obtain the abnormal state of the water-cooled expansion tank of the environmental control system; based on the preset expansion tank fault coefficient, the third operating slope is compared with the corresponding standard operating slope of the tower base to obtain the abnormal state of the water-cooled expansion tank of the tower base. Specifically, through the obtained k1, b1, k2, b2, k3, and b3, using the calculation relationship between temperature and pressure in the water-cooling system: operating slope (K) = (pressure (V) - b) / T, then the engine nacelle operating slope (K1) = (V1 - b1) / T1; the environmental control operating slope (K2) = (V2 - b2) / T2; the tower base operating slope (K3) = (V3 - b3) / T3; through the obtained operating intercepts K1, K2, and K3, when K1 < g×k1, it is determined that the water-cooled expansion pipe of the engine nacelle is abnormal; when K2 < g×k2, it is determined that the water-cooled expansion tank of the environmental control system is abnormal; when K3 < g×k3, it is determined that the water-cooled expansion tank of the tower base is abnormal; as Figure 4 shown. Where g is the expansion tank fault coefficient. It should be noted that to prevent false alarms caused by abnormal data transmission or acquisition, within a 24-hour time range, if the proportion of abnormal data exceeding the limit exceeds 50% within the 24-hour time range, it is confirmed that there is a fault in the water-cooling system of the unit.

[0074] It can be seen that in this embodiment, as shown in Figure 5 shown, historical unit operation data of the water-cooling system of the target wind turbine is obtained, and target operation data with the main state machine state of the wind turbine being the grid-connected state is determined from the historical unit operation data; the correlation relationship between the operating pressure and the operating temperature of the water-cooling system of the target wind turbine is constructed using a preset linear regression algorithm and the target operation data; based on the correlation relationship, the standard operating intercept and the standard operating slope of the water-cooling system of the target wind turbine are determined; the current operation data of the water-cooling system of the target wind turbine is obtained, and based on the current operation data, a preset temperature-pressure calculation method, the standard operating intercept, and the standard operating slope, the current operating intercept and the current operating slope corresponding to the current operation data are respectively determined; based on the current operating intercept and the current operating slope, the current operating state of the water-cooling system of the target wind turbine is determined to complete the fault diagnosis of the water-cooling system of the target wind turbine. That is, by using the linear regression algorithm to calculate the linear relationship between the temperature and pressure of the water-cooling system in the healthy state, and detecting the operating state of the water-cooling system of the target wind turbine through the linear relationship, the fault state of the water-cooling system of the target wind turbine can be accurately judged in real time.

[0075] Refer to Figure 6The embodiment of the present application also discloses a wind turbine water cooling system fault diagnosis device, including:

[0076] An operation data acquisition module 11 is used to acquire historical unit operation data of a target wind turbine unit water cooling system, and determine target operation data in which the main state machine state of the wind turbine is a grid-connected state from the historical unit operation data;

[0077] A correlation determination module 12, configured to construct a correlation between the operating pressure and the operating temperature of the target wind turbine water cooling system by using a preset linear regression algorithm and the target operating data;

[0078] An operation data confirmation module 13, used to determine a standard operation intercept and a standard operation slope of the target wind turbine water cooling system based on the association relationship;

[0079] The current data processing module 14 is used to obtain the current operation data of the water cooling system of the target wind turbine group, and determine the current operation intercept and the current operation slope corresponding to the current operation data based on the current operation data, the preset temperature and pressure calculation method, the standard operation intercept and the standard operation slope;

[0080] The system fault diagnosis module 15 is used to determine the current operating state of the target wind turbine water cooling system based on the current operating intercept and the current operating slope to complete the fault diagnosis of the target wind turbine water cooling system.

[0081] It can be seen that in this embodiment, by using a linear regression algorithm to calculate the linear relationship between the temperature and pressure of the water cooling system in a healthy state, and detecting the operating state of the water cooling system of the target wind turbine set through the linear relationship, the fault state of the water cooling system of the target wind turbine set can be accurately determined in real time.

[0082] In some specific embodiments, the operation data acquisition module 11 may specifically include:

[0083] An operation data collection unit, used to collect historical unit operation data of a target wind turbine unit water cooling system within a preset time period, and determine initial operation data of a wind turbine main state machine state being a grid-connected state from the historical unit operation data;

[0084] The data processing unit is used to eliminate abnormal data in the initial operation data through data comparison operation to obtain target operation data under the normal operation state of the water cooling system of the target wind turbine set.

[0085] In some specific embodiments, the association relationship determination module 12 may specifically include:

[0086] A linear relationship determination unit is used to process the target operation data using a preset linear regression algorithm to obtain a first linear relationship between a cabin water cooling system gearbox outlet pressure and a cabin water cooling system gearbox outlet temperature in the target wind turbine unit water cooling system, a second linear relationship between a cabin environmental control water pump inlet coolant pressure and a cabin environmental control water pump inlet coolant temperature, and a third linear relationship between a tower base water cooling pump inlet water pressure and a tower bottom water cooling system outlet temperature;

[0087] Accordingly, the operation data confirmation module 13 may specifically include:

[0088] A first standard slope calculation unit, configured to determine a cabin operation standard intercept and a cabin operation standard slope in the target wind turbine water cooling system based on the first linear relationship;

[0089] A second standard slope calculation unit, used to determine an environmental control operation standard intercept and an environmental control operation standard slope in the target wind turbine water cooling system based on the second linear relationship;

[0090] The third standard slope calculation unit is used to determine the tower base operation standard intercept and the tower base operation standard slope in the target wind turbine water cooling system based on the third linear relationship.

[0091] In some specific embodiments, the current data processing module 14 may specifically include:

[0092] A current data acquisition unit, used to acquire current operating data of the water cooling system of the target wind turbine group;

[0093] A current intercept calculation submodule, used to determine the corresponding current operation intercept based on the temperature data and pressure data in the current operation data, the intercept calculation formula in the preset temperature and pressure calculation method, and the standard operation slope;

[0094] The current slope calculation submodule is used to determine the corresponding current operation slope based on the temperature data and the pressure data, the slope calculation formula in the preset temperature and pressure calculation method, and the standard operation intercept.

[0095] In some specific embodiments, the current intercept calculation submodule may specifically include:

[0096] A first intercept calculation unit, configured to determine a first operation intercept corresponding to the nacelle in the target wind turbine water cooling system based on the temperature data and pressure data in the current operation data, an intercept calculation formula in a preset temperature and pressure calculation method, and a nacelle operation standard slope;

[0097] A second intercept calculation unit, used to determine a second operation intercept corresponding to the environmental control in the water cooling system of the target wind turbine generator set based on the temperature data and the pressure data, the intercept calculation formula and the environmental control operation standard slope;

[0098] A third intercept calculation unit is used to determine a third operation intercept corresponding to the tower base in the water cooling system of the target wind turbine generator set based on the temperature data and the pressure data, the intercept calculation formula and the tower base operation standard slope.

[0099] In some specific embodiments, the current slope calculation submodule may specifically include:

[0100] a first slope calculation unit, configured to determine a first operation slope corresponding to the cabin based on the temperature data and the pressure data, a slope calculation formula in a preset temperature and pressure calculation method, and the cabin operation standard intercept;

[0101] A second slope calculation unit, configured to determine a second operation slope corresponding to the environmental control based on the temperature data and the pressure data, the slope calculation formula and the environmental control operation standard intercept;

[0102] The third slope calculation unit is used to determine a third operation slope corresponding to the tower foundation based on the temperature data and the pressure data, the slope calculation formula and the tower foundation operation standard intercept.

[0103] In some specific embodiments, the system fault diagnosis module 15 may specifically include:

[0104] a first water cooling pipeline fault diagnosis unit, configured to compare the first operation intercept with the corresponding cabin operation standard intercept based on a preset basic pressure fault coefficient to obtain a pressure fault state of the cabin, and determine a water cooling pipeline fault state of the cabin based on a change trend of the first operation intercept;

[0105] a second water cooling pipeline fault diagnosis unit, configured to compare the second operation intercept with the corresponding environmental control operation standard intercept based on the preset basic pressure fault coefficient to obtain the pressure fault state of the environmental control, and determine the water cooling pipeline fault state of the environmental control based on the change trend of the second operation intercept;

[0106] a third water-cooling pipeline fault diagnosis unit, configured to compare the third operation intercept with the corresponding tower base operation standard intercept based on the preset basic pressure fault coefficient to obtain a pressure fault state of the tower base, and determine a water-cooling pipeline fault state of the tower base based on a change trend of the third operation intercept;

[0107] a first expansion tank diagnostic unit, configured to compare the first operation slope with a corresponding cabin operation standard slope based on a preset expansion tank fault coefficient to obtain an abnormal state of a water-cooled expansion tank of the cabin;

[0108] The second expansion tank diagnostic unit is used to compare the second operation slope with the corresponding environmental control operation standard slope based on the preset expansion tank fault coefficient to obtain the abnormal state of the water-cooled expansion tank of the environmental control

[0109] The third expansion tank diagnostic unit is used to compare the third operation slope with the corresponding tower base operation standard slope based on the preset expansion tank fault coefficient to obtain the abnormal state of the water-cooled expansion tank of the tower base.

[0110] Furthermore, the present application also discloses an electronic device. Figure 7 This is a structural diagram of an electronic device 20 according to an exemplary embodiment. The content in the diagram cannot be regarded as any limitation on the scope of use of the present application.

[0111] Figure 7 A schematic diagram of the structure of an electronic device 20 provided in an embodiment of the present application. The electronic device 20 may specifically include: at least one processor 21, at least one memory 22, a power supply 23, a communication interface 24, an input / output interface 25, and a communication bus 26. The memory 22 is used to store a computer program, which is loaded and executed by the processor 21 to implement the relevant steps in the wind turbine water cooling system fault diagnosis method disclosed in any of the aforementioned embodiments. In addition, the electronic device 20 in this embodiment may specifically be an electronic computer.

[0112] In this embodiment, the power supply 23 is used to provide working voltage for each hardware device on the electronic device 20; the communication interface 24 can create a data transmission channel between the electronic device 20 and the external device, and the communication protocol it follows is any communication protocol that can be applied to the technical solution of the present application, and is not specifically limited here; the input and output interface 25 is used to obtain external input data or output data to the outside world, and its specific interface type can be selected according to specific application needs and is not specifically limited here.

[0113] In addition, the memory 22, as a carrier for storing resources, can be a read-only memory, a random access memory, a disk or an optical disk, etc. The resources stored thereon can include an operating system 221, a computer program 222, etc., and the storage method can be temporary storage or permanent storage.

[0114] The operating system 221 is used to manage and control the hardware devices and computer program 222 on the electronic device 20, which can be Windows Server, Netware, Unix, Linux, etc. In addition to including a computer program that can be used to complete the wind turbine water cooling system fault diagnosis method performed by the electronic device 20 disclosed in any of the aforementioned embodiments, the computer program 222 can further include a computer program that can be used to complete other specific tasks.

[0115] Furthermore, the present application also discloses a computer-readable storage medium for storing a computer program; wherein, when the computer program is executed by a processor, the wind turbine water cooling system fault diagnosis method disclosed above is implemented. The specific steps of the method can refer to the corresponding contents disclosed in the above embodiments, and will not be repeated here.

[0116] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0117] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0118] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0119] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0120] The technical solution provided by the present application is introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A fault diagnosis method for a wind turbine water cooling system. It is characterized in that include: Acquire historical unit operation data of a target wind turbine water cooling system, and determine target operation data in which the main state machine state of the wind turbine is a grid-connected state from the historical unit operation data; Using a preset linear regression algorithm and the target operating data to construct a correlation between the operating pressure and the operating temperature of the water cooling system of the target wind turbine generator set; Determine a standard operation intercept and a standard operation slope of the target wind turbine water cooling system based on the association relationship; Acquire current operating data of the target wind turbine water cooling system, and determine a current operating intercept and a current operating slope corresponding to the current operating data based on the current operating data, a preset temperature and pressure calculation method, the standard operating intercept and the standard operating slope; The current operating state of the target wind turbine water cooling system is determined based on the current operating intercept and the current operating slope to complete the fault diagnosis of the target wind turbine water cooling system.

2. The wind turbine water cooling system fault diagnosis method according to claim 1, It is characterized in that The step of obtaining historical unit operation data of a target wind turbine water cooling system and determining target operation data in which the main state machine state of the wind turbine is a grid-connected state from the historical unit operation data includes: Collect historical unit operation data of the target wind turbine water cooling system within a preset time period, and determine the initial operation data of the wind turbine main state machine state being the grid-connected state from the historical unit operation data; The abnormal data in the initial operation data is eliminated through a data comparison operation to obtain the target operation data of the target wind turbine set water cooling system under normal operation.

3. The wind turbine water cooling system fault diagnosis method according to claim 1 or 2, It is characterized in that The using of a preset linear regression algorithm and the target operating data to construct a correlation between the operating pressure and the operating temperature of the target wind turbine water cooling system includes: The target operation data are processed by using a preset linear regression algorithm to obtain a first linear relationship between a cabin water cooling system gearbox outlet pressure and a cabin water cooling system gearbox outlet temperature in the target wind turbine unit water cooling system, a second linear relationship between a cabin environmental control water pump inlet coolant pressure and a cabin environmental control water pump inlet coolant temperature, and a third linear relationship between a tower base water cooling pump inlet water pressure and a tower bottom water cooling system outlet temperature; Accordingly, determining the standard operation intercept and the standard operation slope of the target wind turbine water cooling system based on the association relationship includes: Determine a cabin operation standard intercept and a cabin operation standard slope in the target wind turbine water cooling system based on the first linear relationship; Determine the standard intercept and the standard slope of the environmental control operation in the water cooling system of the target wind turbine generator set based on the second linear relationship; Based on the third linear relationship, a tower base operation standard intercept and a tower base operation standard slope in the target wind turbine water cooling system are determined.

4. The wind turbine water cooling system fault diagnosis method according to claim 3, It is characterized in that The obtaining of the current operating data of the target wind turbine water cooling system, and determining the current operating intercept and the current operating slope corresponding to the current operating data based on the current operating data, a preset temperature and pressure calculation method, the standard operating intercept and the standard operating slope, respectively, includes: Acquire current operating data of the target wind turbine water cooling system; Determine the corresponding current operation intercept based on the temperature data and pressure data in the current operation data, the intercept calculation formula in the preset temperature and pressure calculation method, and the standard operation slope; The corresponding current operation slope is determined based on the temperature data and the pressure data, the slope calculation formula in the preset temperature and pressure calculation method, and the standard operation intercept.

5. The wind turbine water cooling system fault diagnosis method according to claim 4, It is characterized in that The determining the corresponding current operation intercept based on the temperature data and pressure data in the current operation data, the intercept calculation formula in the preset temperature and pressure calculation method, and the standard operation slope includes: Determine a first operation intercept corresponding to the nacelle in the target wind turbine water cooling system based on the temperature data and pressure data in the current operation data, the intercept calculation formula in the preset temperature and pressure calculation method, and the nacelle operation standard slope; Determine a second operation intercept corresponding to the environmental control in the water cooling system of the target wind turbine generator set based on the temperature data and the pressure data, the intercept calculation formula and the environmental control operation standard slope; The third operation intercept corresponding to the tower base in the water cooling system of the target wind turbine generator set is determined based on the temperature data and the pressure data, the intercept calculation formula and the tower base operation standard slope.

6. The wind turbine water cooling system fault diagnosis method according to claim 5, It is characterized in that The determining of the corresponding current operation slope based on the temperature data and the pressure data, the slope calculation formula in the preset temperature and pressure calculation method, and the standard operation intercept includes: Determine a first operation slope corresponding to the cabin based on the temperature data and the pressure data, a slope calculation formula in a preset temperature and pressure calculation method, and the cabin operation standard intercept; Determine a second operation slope corresponding to the environmental control based on the temperature data and the pressure data, the slope calculation formula and the environmental control operation standard intercept; A third operation slope corresponding to the tower foundation is determined based on the temperature data and the pressure data, the slope calculation formula and the tower foundation operation standard intercept.

7. The wind turbine water cooling system fault diagnosis method according to claim 6, It is characterized in that The determining the current operating state of the target wind turbine water cooling system based on the current operating intercept and the current operating slope to complete the fault diagnosis of the target wind turbine water cooling system includes: Based on a preset basic pressure fault coefficient, the first operation intercept is compared with the corresponding cabin operation standard intercept to obtain a pressure fault state of the cabin, and a water cooling pipeline fault state of the cabin is determined based on a change trend of the first operation intercept; Based on the preset basic pressure fault coefficient, the second operation intercept is compared with the corresponding standard intercept of the environmental control operation to obtain the pressure fault state of the environmental control, and the water cooling pipeline fault state of the environmental control is determined based on the change trend of the second operation intercept; Based on the preset basic pressure fault coefficient, the third operation intercept is compared with the corresponding tower base operation standard intercept to obtain the pressure fault state of the tower base, and the water cooling pipeline fault state of the tower base is determined based on the change trend of the third operation intercept; Based on a preset expansion tank failure coefficient, comparing the first operation slope with a corresponding cabin operation standard slope to obtain an abnormal state of a water-cooled expansion tank of the cabin; Based on the preset expansion tank fault coefficient, the second operation slope is compared with the corresponding environmental control operation standard slope to obtain the abnormal state of the water-cooled expansion tank of the environmental control Based on the preset expansion tank failure coefficient, the third operation slope is compared with the corresponding tower base operation standard slope to obtain the abnormal state of the water-cooled expansion tank of the tower base.

8. A fault diagnosis device for a wind turbine water cooling system, It is characterized in that include: An operation data acquisition module is used to acquire historical unit operation data of a target wind turbine unit water cooling system, and determine target operation data in which the main state machine state of the wind turbine is a grid-connected state from the historical unit operation data; A correlation determination module, used to construct a correlation between the operating pressure and the operating temperature of the water cooling system of the target wind turbine generator set by using a preset linear regression algorithm and the target operating data; An operation data confirmation module, used to determine a standard operation intercept and a standard operation slope of the target wind turbine water cooling system based on the association relationship; A current data processing module, used to obtain current operating data of the target wind turbine water cooling system, and determine the current operating intercept and the current operating slope corresponding to the current operating data based on the current operating data, a preset temperature and pressure calculation method, the standard operating intercept and the standard operating slope; A system fault diagnosis module is used to determine the current operating state of the target wind turbine water cooling system based on the current operating intercept and the current operating slope to complete the fault diagnosis of the target wind turbine water cooling system.

9. An electronic device, It is characterized in that include: Memory, used to store computer programs; A processor is used to execute the computer program to implement the wind turbine water cooling system fault diagnosis method according to any one of claims 1 to 7.

10. A computer-readable storage medium, It is characterized in that Used to store a computer program, which, when executed by a processor, implements the wind turbine water cooling system fault diagnosis method according to any one of claims 1 to 7.

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