Water-cooling System Fault Monitoring Method, Device, Water-cooling System and Wind Turbine Generator

Abstract

The present application discloses a method and device for monitoring faults in a water cooling system, the water cooling system, and a wind turbine generator set. The method includes obtaining a first pressure value at the water inlet of a water pump and a second pressure value at the water outlet of the water pump; determining the state of a pressure sensor according to the first pressure value and the second pressure value; determining the state of a breather valve when the state of the pressure sensor is normal; and determining the cooling water volume of the water cooling system according to the first pressure value when the state of the breather valve is normal. That is, first, two pressure sensors arranged at the water inlet and the water outlet of the water pump are used to respectively and real-time collect the first pressure value at the water inlet of the water pump and the second pressure value at the water outlet of the water pump, and then the states of the pressure sensor, the breather valve, and the cooling water volume are sequentially judged according to the first pressure value and the second pressure value. This can not only pre-detect or timely detect the abnormal state of the water cooling system, but also determine the cause of the fault and the corresponding faulty component according to the collected data, providing guidance and direction for rapid maintenance.

Description

Technical Field

[0001] The present application relates to the technical field of water cooling systems, and particularly to a method and device for monitoring faults in a water cooling system, a water cooling system, and a wind turbine generator set. Background Art

[0002] During the operation of high-power power electronic devices, the cooling system is crucial for their safe operation and service life, and is a very important supporting device. For example, there are numerous electrical components in a wind turbine generator set, and temperature has a great influence on the operating characteristics of electrical components. With the increase in the installation altitude of onshore wind turbine generator sets and the development of offshore high-power wind turbine generator sets, the requirements for the heat dissipation capacity of wind turbine generator sets have also increased accordingly. Air-cooled wind turbine generator sets can no longer meet the requirements in harsh environments and high-power situations, and water-cooled wind turbine generator sets have become the mainstream. A water-cooled wind turbine generator set has a water cooling system to dissipate heat from the heating electrical components of the wind turbine generator set. Therefore, the cooling state of the water cooling system of the wind turbine generator set will directly affect whether the wind turbine generator set can operate normally.

[0003] However, during the operation of the water cooling system, it may also operate abnormally due to reasons such as equipment aging and faults. If the abnormality cannot be detected in time, it is very likely to affect the operation of the wind turbine generator set due to poor or untimely heat dissipation. Therefore, it is necessary to monitor the faults of the water cooling system. The existing technical solutions mainly evaluate the key parameters of the water cooling system to obtain the cooling state of the water cooling system. For example, the inlet water temperature of the wind turbine generator set is collected and compared with the normal temperature range. When the inlet water temperature of the wind turbine generator set does not exceed the normal temperature range, it indicates that the water cooling system is operating normally. When the inlet water temperature of the wind turbine generator set exceeds the normal temperature range, it indicates that the cooling state of the water cooling system is abnormal. Obviously, such a passive monitoring method can only be detected when the temperature of the wind turbine generator set is relatively high, cannot predict the faults of the water cooling system, and cannot know the cause and location of the faults when the water cooling system is abnormal, resulting in problems such as greater difficulty in maintenance and longer maintenance time. Summary of the Invention

[0004] In order to solve the above technical problems, the present application is proposed. Embodiments of the present application provide a method and device for monitoring faults in a water cooling system, a water cooling system, and a wind turbine generator set, which solve the above technical problems.

[0005] According to an aspect of the present application, a method for monitoring faults in a water cooling system is provided. The water cooling system includes an elevated water tank, a water pump, two pressure sensors, and a breather valve. Among them, the breather valve is arranged on the elevated water tank, and the breather valve is opened to reduce the air pressure in the elevated water tank. The two pressure sensors are respectively arranged at the water inlet and the water outlet of the water pump. The method for monitoring faults in the water cooling system includes: obtaining a first pressure value at the water inlet of the water pump and a second pressure value at the water outlet; determining the state of the pressure sensors according to the first pressure value and the second pressure value; when the state of the pressure sensors is normal, determining the state of the breather valve; and when the state of the breather valve is normal, determining the cooling water volume of the water cooling system according to the first pressure value.

[0006] In an embodiment, before obtaining the first pressure value at the water inlet of the water pump and the second pressure value at the water outlet, the method for monitoring faults in the water cooling system further includes: obtaining the operating condition information of the water cooling system; the determining the state of the pressure sensors according to the first pressure value and the second pressure value includes: determining the state of the pressure sensors according to the operating condition information, the first pressure value, and the second pressure value.

[0007] In an embodiment, the determining the state of the pressure sensors according to the operating condition information, the first pressure value, and the second pressure value includes: when the operating condition information is in a stop state, calculating the pressure difference between the first pressure value and the second pressure value; and when the pressure difference is less than a first preset value, determining that the state of the pressure sensors is normal.

[0008] In an embodiment, the determining the state of the breather valve includes: when the first pressure value is less than a second preset value, determining that the state of the breather valve is normal.

[0009] In an embodiment, the determining the cooling water volume of the water cooling system according to the first pressure value includes: calculating the average value of the first pressure value in a plurality of first preset time periods to obtain a plurality of first average values; and when the minimum value among the plurality of first average values is less than a third preset value, determining that the water cooling system lacks cooling water.

[0010] In one embodiment, determining the state of the pressure sensor based on the working condition information, the first pressure value, and the second pressure value includes: when the working condition information is in an operating state, obtaining a plurality of the first pressure values and a plurality of the second pressure values within a second preset time period; when the standard deviation of the plurality of the first pressure values within the second preset time period is not zero and the standard deviation of the plurality of the second pressure values within the second preset time period is not zero, calculating the pressure difference between the first pressure value and the second pressure value at the same moment; and when the pressure difference is greater than a fourth preset value and less than a fifth preset value, determining that the state of the pressure sensor is normal; wherein, the fourth preset value is less than the fifth preset value.

[0011] In one embodiment, determining the state of the breathing valve includes: when the first pressure value is less than a sixth preset value, determining that the state of the breathing valve is normal.

[0012] In one embodiment, determining the cooling water volume of the water cooling system based on the first pressure value includes: calculating the average value of the first pressure value within a plurality of third preset time periods to obtain a plurality of second average values; and when the minimum value of the plurality of second average values is less than a seventh preset value, determining that the water cooling system lacks cooling water; wherein, the seventh preset value is related to the ambient temperature.

[0013] According to another aspect of the present application, there is provided a water cooling system fault monitoring device. The water cooling system includes a high-level water tank, a water pump, two pressure sensors, and a breathing valve. The breathing valve is arranged on the high-level water tank and is opened to reduce the air pressure in the high-level water tank. The two pressure sensors are respectively arranged at the water inlet and the water outlet of the water pump. The water cooling system fault monitoring device includes: a pressure acquisition module for acquiring the first pressure value at the water inlet of the water pump and the second pressure value at the water outlet; a first determination module for determining the state of the pressure sensor according to the first pressure value and the second pressure value; a second determination module for determining the state of the breathing valve when the state of the pressure sensor is normal; and a third determination module for determining the cooling water volume of the water cooling system according to the first pressure value when the state of the breathing valve is normal.

[0014] According to another aspect of the present application, there is provided a water cooling system, including: a high-level water tank; a breathing valve arranged on the high-level water tank and opened to reduce the air pressure in the high-level water tank; a water pump; two pressure sensors respectively arranged at the water inlet and the water outlet of the water pump; and the water cooling system fault monitoring device as described above.

[0015] According to another aspect of the present application, a wind turbine generator is provided, including: the water cooling system as described above.

[0016] A method and device for monitoring faults of a water cooling system, the water cooling system and a wind turbine generator provided by the present application. The water cooling system includes a high-level water tank, a water pump, two pressure sensors and a breather valve. The breather valve is arranged on the high-level water tank and is opened to reduce the air pressure in the high-level water tank. The two pressure sensors are respectively arranged at the water inlet and the water outlet of the water pump. The present application obtains a first pressure value at the water inlet of the water pump and a second pressure value at the water outlet of the water pump; determines the state of the pressure sensors according to the first pressure value and the second pressure value; determines the state of the breather valve when the state of the pressure sensors is normal; and determines the cooling water volume of the water cooling system according to the first pressure value when the state of the breather valve is normal. That is, first, two pressure sensors arranged at the water inlet and the water outlet of the water pump are used to respectively collect the first pressure value at the water inlet of the water pump and the second pressure value at the water outlet of the water pump in real time, and then the states of the pressure sensors, the breather valve and the cooling water volume are judged in sequence according to the first pressure value and the second pressure value. It can not only pre-detect or timely detect the abnormal state of the water cooling system, but also determine the cause of the fault and the corresponding faulty components according to the collected data, so as to provide guidance for quick repair. Description of the Drawings

[0017] By describing the embodiments of the present application in more detail in conjunction with the drawings, the above and other objects, features and advantages of the present application will become more obvious. The drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation to the present application. In the drawings, the same reference numerals generally represent the same components or steps.

[0018] Figure 1 It is a schematic flowchart of a method for monitoring faults of a water cooling system provided by an exemplary embodiment of the present application.

[0019] Figure 2 It is a schematic flowchart of a method for monitoring faults of a water cooling system provided by another exemplary embodiment of the present application.

[0020] Figure 3 It is a schematic flowchart of a method for monitoring faults of a water cooling system provided by another exemplary embodiment of the present application.

[0021] Figure 4 It is a schematic flowchart of a method for monitoring faults of a water cooling system provided by another exemplary embodiment of the present application.

[0022] Figure 5 It is a schematic flowchart of a method for monitoring faults of a water cooling system provided by another exemplary embodiment of the present application.

[0023] Figure 6 It is a schematic structural diagram of a water-cooling system fault monitoring device provided by an exemplary embodiment of the present application.

[0024] Figure 7 It is a schematic structural diagram of a water-cooling system fault monitoring device provided by another exemplary embodiment of the present application.

[0025] Figure 8 It is a structural diagram of an electronic device provided by an exemplary embodiment of the present application. Detailed implementation manners

[0026] Next, exemplary embodiments of the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments of the present application. It should be understood that the present application is not limited by the exemplary embodiments described herein.

[0027] Figure 1 It is a schematic flowchart of a water-cooling system fault monitoring method provided by an exemplary embodiment of the present application. Among them, the water-cooling system includes a high-level water tank, a water pump, two pressure sensors, and a breather valve. The high-level water tank is used to store the cooling water required by the water-cooling system. The high-level water tank is usually set at a high place to supply water by the self-weight of water to reduce the difficulty of water supply. The breather valve is set on the high-level water tank, and the breather valve is opened to reduce the air pressure in the high-level water tank. The two pressure sensors are respectively set at the water inlet and the water outlet of the water pump. As Figure 1 shown, the water-cooling system fault monitoring method includes the following steps:

[0028] Step 100: Obtain a first pressure value at the water inlet of the water pump and a second pressure value at the water outlet of the water pump.

[0029] Specifically, when an abnormality or a fault occurs in the water-cooling system, usually its fault will be a pressure sensor fault, a breather valve fault, or a lack of cooling water, etc. And these faults will all affect the pressure value at the water inlet of the water pump and / or the pressure value at the water outlet of the water pump. Therefore, in the present application, pressure sensors are respectively set at the water inlet and the water outlet of the water pump to continuously monitor the first pressure value at the water inlet of the water pump and the second pressure value at the water outlet of the water pump, so as to monitor the abnormality and fault of the water-cooling system.

[0030] Step 200: Determine the state of the pressure sensor according to the first pressure value and the second pressure value.

[0031] Since the first pressure value at the water inlet of the water pump and the second pressure value at the water outlet are both obtained by collecting through pressure sensors, if the pressure sensors themselves malfunction, the first pressure value or the second pressure value collected by the pressure sensors is not the true value. If the pressure value collected at this time is used for abnormal or fault determination, it is obviously inaccurate or even wrong. Therefore, the present application first needs to exclude the faults of the pressure sensors, and only when the pressure sensors are normal can the subsequent determination be ensured to be accurate.

[0032] Step 300: When the status of the pressure sensor is normal, determine the status of the breathing valve.

[0033] As a pressure balance valve for adjusting the pressure in the elevated water tank, if the breathing valve malfunctions, it may cause excessive air pressure in the elevated water tank, thus affecting the water pressure of the water cooling system. Therefore, when the present application determines that the pressure sensor is normal, it further determines whether the breathing valve is normal, so as to more accurately obtain the true water pressure in the water circuit and provide guarantee for subsequent accurate monitoring.

[0034] Step 400: When the status of the breathing valve is normal, determine the cooling water volume of the water cooling system according to the first pressure value.

[0035] When it is determined that both the pressure sensor and the breathing valve are normal, further determine the cooling water volume of the water cooling system, that is, determine whether the water cooling system lacks cooling water, so as to more accurately monitor the abnormalities and faults of the water cooling system, and quickly know the cause and location of the fault (i.e., the corresponding faulty component) when there is an abnormality or a fault, so as to provide guidance for maintenance.

[0036] A method for monitoring faults of a water cooling system provided by the present application. The water cooling system includes an elevated water tank, a water pump, two pressure sensors and a breathing valve. Among them, the breathing valve is arranged on the elevated water tank, and the breathing valve opens to reduce the air pressure in the elevated water tank. The two pressure sensors are respectively arranged at the water inlet and the water outlet of the water pump. The present application obtains the first pressure value at the water inlet of the water pump and the second pressure value at the water outlet; determines the status of the pressure sensor according to the first pressure value and the second pressure value; when the status of the pressure sensor is normal, determines the status of the breathing valve; and when the status of the breathing valve is normal, determines the cooling water volume of the water cooling system according to the first pressure value. That is, first, two pressure sensors arranged at the water inlet and the water outlet of the water pump are used to respectively collect the first pressure value at the water inlet of the water pump and the second pressure value at the water outlet in real time, and then the statuses of the pressure sensor, the breathing valve and the cooling water volume are sequentially judged according to the first pressure value and the second pressure value, which can not only pre-detect or timely detect the abnormal state of the water cooling system, but also determine the cause of the fault and the corresponding faulty component according to the collected data, so as to provide guidance and direction for quick maintenance.

[0037] Figure 2It is a schematic flow chart of a water cooling system fault monitoring method provided by another exemplary embodiment of the present application. As Figure 2 shown, before step 100, the above-mentioned water cooling system fault monitoring method may further include:

[0038] Step 500: Obtain the working condition information of the water cooling system.

[0039] Since the wind turbine may not need heat dissipation during the stop state or low-power operation, etc., at this time the water cooling system does not work, that is, the water pump does not work, and the corresponding water pressure value is different from the water pressure value when the water cooling system is working. Therefore, the present application first obtains the working condition information of the water cooling system when monitoring the water cooling system to determine whether it is in a working state, and adopts corresponding determination methods and criteria to monitor the water cooling system for abnormalities and faults, so as to improve the accuracy of monitoring.

[0040] Correspondingly, step 200 may include:

[0041] Step 210: Determine the state of the pressure sensor according to the working condition information, the first pressure value and the second pressure value.

[0042] After the present application determines the working condition information of the water cooling system, based on the current working condition information, it adopts corresponding determination methods and criteria to determine the abnormalities and faults of the water cooling system, so as to more accurately determine whether the water cooling system is abnormal or faulty.

[0043] Figure 3 It is a schematic flow chart of a water cooling system fault monitoring method provided by another exemplary embodiment of the present application. As Figure 3 shown, the above step 210 may include:

[0044] Step 211: When the working condition information is the stop state, calculate the pressure difference between the first pressure value and the second pressure value.

[0045] If the working condition information of the water cooling system is the stop state, that is, heat dissipation is not required at this time, the present application calculates the first pressure value at the water inlet of the water pump and the second pressure value at the water outlet in the stop state, and determines the abnormalities or faults of the water cooling system according to the pressure difference between the first pressure value and the second pressure value, so as to pre-detect the abnormalities or faults in the water cooling system before it works, so as to realize pre-alarm and early maintenance, and avoid affecting the normal heat dissipation requirements of devices that need heat dissipation such as wind turbines.

[0046] Step 212: When the pressure difference is less than the first preset value, determine that the state of the pressure sensor is normal.

[0047] This application obtains a first preset value based on the static pressure value of the water cooling system. Specifically, the first preset value can be set to 0.4 bar (this value can be set according to the actual scenario or different devices). If the pressure difference between the first pressure value and the second pressure value (the absolute value of the difference between the first pressure value and the second pressure value) is less than the first preset value, it indicates that the first pressure value and the second pressure value are close, and at this time, it can be determined that the pressure sensor is normal. Correspondingly, if the pressure difference between the first pressure value and the second pressure value (the absolute value of the difference between the first pressure value and the second pressure value) is greater than or equal to the first preset value, it indicates that the first pressure value and the second pressure value are quite different. In the stopped state, the pressure difference between the first pressure value and the second pressure value should theoretically be zero, and at this time, it can be determined that the pressure sensor is abnormal. It should be understood that generally, the probability of two sensors failing simultaneously is very low. If both pressure sensors fail and the pressure values they collect (i.e., the first pressure value and the second pressure value) are close, this application can also determine the state of the pressure sensor according to the normal ranges of the first pressure value and the second pressure value in the stopped state.

[0048] In one embodiment, as Figure 3 shown, the above step 300 may include:

[0049] Step 310: When the first pressure value is less than the second preset value, determine that the state of the breather valve is normal.

[0050] The working pressure threshold of the breather valve is 0.4 bar, that is, when the internal gas pressure of the elevated water tank exceeds 0.4 bar, the breather valve will open to exhaust to the outside to balance the internal pressure of the elevated water tank to 0.4 bar. The pressure generated by the liquid level difference between the elevated water tank and the water pump is about 0.5 bar. Therefore, theoretically, the pressure value at the water inlet of the water pump in the static state is about 0.9 bar. Considering the complexity of the actual water cooling system, even when the water cooling system is in the stopped state, the water pressure may still fluctuate due to other factors such as vibration. This application sets a certain margin, that is, the second preset value is set to 1.2 bar. When the pressure sensor of the water cooling system is fault-free and the first pressure value at the water inlet of the water pump is less than the second preset value, it indicates that the air pressure in the elevated water tank is normal at this time, and the breather valve is considered normal. When the pressure sensor of the water cooling system is fault-free and the first pressure value at the water inlet of the water pump is greater than or equal to the second preset value, it indicates that the air pressure in the elevated water tank is abnormal at this time, and the breather valve is considered faulty.

[0051] In one embodiment, as Figure 3 shown, the above step 400 may include:

[0052] Step 410: Calculate the average value of the first pressure values in multiple first preset time periods to obtain multiple first average values.

[0053] On the premise that both the pressure sensor and the breathing valve are normal, the present application further determines whether the amount of cooling water is normal. Specifically, first, the downsampling method is used to collect the first pressure value at the water inlet of the water pump for a period of time, and the average value of the first pressure values within this period of time is calculated as the average value of the first pressure values within multiple first preset time periods. For example, the first pressure values within 1 hour (this period of time) are used, and the first average value within each minute (the first preset time period) is calculated, that is, the average pressure value within one minute represents the first pressure value of this minute, so as to form a data set (including multiple first average values).

[0054] Step 420: When the minimum value among the multiple first average values is less than the third preset value, it is determined that the water cooling system lacks cooling water.

[0055] After obtaining the data set including multiple first average values, calculate the minimum value in this data set. If the minimum value is less than the third preset value, it indicates that the water pressure in the water circuit is insufficient at this time, and it is considered that the water cooling system lacks cooling water. Among them, the third preset value can be obtained by statistically analyzing the pressure data at the water inlet of the water pumps of multiple normal water-cooled wind turbine generators for a period of time through the downsampling method, and obtaining the data set and the minimum value of the corresponding average pressure value of multiple normal water-cooled wind turbine generators in a similar manner as above. Then, the minimum value of this average pressure value is used as the third preset value, that is, multiple normal water-cooled wind turbine generators are used as a standard to determine whether the water cooling system of the current wind turbine generator lacks cooling water. It can be understood that if the minimum value is greater than or equal to the third preset value, it indicates that the water pressure in the water circuit is sufficient at this time, and it is considered that the water cooling system does not lack cooling water.

[0056] Figure 4 It is a schematic flowchart of a water cooling system fault monitoring method provided by another exemplary embodiment of the present application. As Figure 4 shown, the above step 210 may include:

[0057] Step 213: When the working condition information is the running state, obtain multiple first pressure values and multiple second pressure values within the second preset time period.

[0058] If the working condition information of the water cooling system is the running state, that is, heat dissipation is required at this time, random small fluctuations will occur in the water pressure during the operation of the water cooling system. The present application determines whether such small fluctuations exist by obtaining multiple first pressure values and multiple second pressure values within the second preset time period (such as one hour).

[0059] Step 214: When the standard deviation of the multiple first pressure values within the second preset time period is not zero and the standard deviation of the multiple second pressure values within the second preset time period is not zero, calculate the pressure difference between the first pressure value and the second pressure value at the same moment.

[0060] If the standard deviation of multiple first pressure values within the second preset time period (e.g., the sum of the absolute values of the differences between adjacent first pressure values) is not zero, and the standard deviation of multiple second pressure values within the second preset time period is also not zero, it indicates that the pressure data collected by the pressure sensor at this time reflects fluctuations in the water cooling system. At this time, further calculate the pressure difference between the first pressure value and the second pressure value. Specifically, this pressure difference can be the pressure difference between the first pressure value and the second pressure value corresponding to one of the moments, or the pressure difference between the average value of multiple first pressure values and the average value of multiple second pressure values within the second preset time period. If the standard deviation of multiple first pressure values within the second preset time period (e.g., the sum of the absolute values of the differences between adjacent first pressure values) is zero, or the standard deviation of multiple second pressure values within the second preset time period is also zero, it indicates that the pressure data collected by the pressure sensor remains unchanged at this time (a dead value situation occurs), that is, it does not reflect fluctuations in the water cooling system, then it indicates that the pressure sensor is faulty.

[0061] Step 215: When the pressure difference is greater than the fourth preset value and less than the fifth preset value, determine that the state of the pressure sensor is normal.

[0062] Among them, the fourth preset value is less than the fifth preset value. Since the second pressure value at the water pump outlet is always greater than the first pressure value at the water pump inlet during the operation of the water pump motor, by actually counting the pressure differences at the inlet and outlet of the water pump during the operation of the water cooling systems of each wind turbine generator, it can be obtained that the pressure difference at the inlet and outlet of the water cooling system of the same type is 1.5 bar - 3.5 bar. Therefore, in this application, the fourth preset value can be set to 1 bar and the fifth preset value can be set to 4 bar. When the pressure difference is greater than the fourth preset value and less than the fifth preset value, it indicates that the pressure difference between the first pressure value and the second pressure value is within the normal range, then it is considered that the state of the pressure sensor is normal. When the pressure difference is greater than or equal to the fifth preset value, it indicates that the pressure difference between the water pump inlet and outlet has exceeded the maximum work that the water pump motor can theoretically do, which is obviously impossible, so it can be considered that the sensor is faulty. When the pressure difference is less than or equal to the fourth preset value, after the cooling water does work through the water pump, the increased pressure is lower than the theoretical pressure value. At this time, it may be because there is a problem with the pressure value measured by the pressure sensor, then it is considered that the sensor is faulty.

[0063] In one embodiment, as Figure 4 shown, the above step 300 may include:

[0064] Step 320: When the first pressure value is less than the sixth preset value, determine that the state of the breather valve is normal.

[0065] The working pressure threshold of the breathing valve is 0.4 bar. That is, when the internal gas pressure of the high-level water tank exceeds 0.4 bar, the breathing valve will open to exhaust to the outside, so as to balance the internal pressure of the high-level water tank to 0.4 bar. The pressure generated by the liquid level difference between the high-level water tank and the water pump is about 0.5 bar. And when the water pump is running, the pressure at the water inlet of the water pump will decrease by 0.1 bar to 0.2 bar. Therefore, theoretically, the pressure value at the water inlet of the water pump under static conditions is about 0.7 - 0.8 bar. Considering the complexity of the actual water cooling system, a certain margin is set in this application, that is, the sixth preset value is set to 1.1 bar. When the pressure sensor of the water cooling system is fault-free and the first pressure value at the water inlet of the water pump is less than the sixth preset value, it indicates that the air pressure in the high-level water tank is normal at this time, and the breathing valve is considered normal. When the pressure sensor of the water cooling system is fault-free and the first pressure value at the water inlet of the water pump is greater than or equal to the sixth preset value, it indicates that the air pressure in the high-level water tank is abnormal at this time, and the breathing valve is considered faulty.

[0066] In one embodiment, as Figure 4 shown, the above step 400 may include:

[0067] Step 430: Calculate the average value of the first pressure values within multiple third preset time periods to obtain multiple second average values.

[0068] On the premise that both the pressure sensor and the breathing valve are normal, this application further determines whether the water volume of the cooling water is normal. Specifically, first use the downsampling method to collect the first pressure value at the water inlet of the water pump for a period of time, and calculate the average value of the first pressure values within multiple third preset time periods during this period. For example, use the first pressure value within 1 hour (this period of time), and calculate the second average value within each minute (the third preset time period), that is, use the pressure average value within one minute to represent the first pressure value of this minute, so as to form a data set (including multiple second average values).

[0069] Step 440: When the minimum value among the multiple second average values is less than the seventh preset value, determine that the water cooling system lacks cooling water.

[0070] Among them, the seventh preset value is related to the ambient temperature. After obtaining a data set including multiple second average values, calculate the minimum value in this data set. If the minimum value is less than the seventh preset value, it indicates that the water pressure in the waterway is insufficient at this time, and it is considered that the water-cooling system lacks cooling water. The acquisition method of the seventh preset value can be as follows: when the ambient temperature is greater than 5°C, statistically analyze the pressure data at the water inlet of the water pumps of multiple normal water-cooled wind turbines over a period of time through downsampling, and obtain the data set and the minimum value of the corresponding average pressure value of multiple normal water-cooled wind turbines in a similar manner as above. Then, use the minimum value of the average pressure value as the seventh preset value, that is, use multiple normal water-cooled wind turbines as a standard to determine whether the water-cooling system of the current wind turbine lacks cooling water. When the ambient temperature is less than or equal to 5°C, calculate the minimum value of the data set and the corresponding average pressure value of multiple normal water-cooled wind turbines in the same method, and subtract a fixed value (such as 0.2) from the minimum value of the average pressure value to obtain the seventh preset value. The present application adjusts the size of the seventh preset value according to the ambient temperature to eliminate the influence of the ambient temperature on the water pressure, thereby improving the accuracy of the determination. It can be understood that if the minimum value is greater than or equal to the seventh preset value, it indicates that the water pressure in the waterway is sufficient at this time, and it is considered that the water-cooling system does not lack cooling water.

[0071] Figure 5 is a schematic flow chart of a water-cooling system fault monitoring method provided by another exemplary embodiment of the present application. As Figure 5 shown, the water-cooling system fault monitoring method includes the following steps:

[0072] Step 501: Obtain the operating condition information of the water-cooling system.

[0073] This step is similar to the above step 500 and will not be elaborated here.

[0074] Step 502: When the operating condition information is in the stop state, calculate the pressure difference p3 between the water inlet and outlet of the water pump.

[0075] Among them, p3 is the pressure difference between the first pressure value and the second pressure value. This step is similar to the above step 211 and will not be elaborated here.

[0076] Step 503: Determine whether p3 is greater than p4. If so, go to step 504; otherwise, go to step 505.

[0077] Among them, p4 is the first preset value. This step is similar to the above step 212 and will not be elaborated here.

[0078] Step 504: Report a pressure sensor failure.

[0079] Step 505: Determine whether the pressure at the water pump inlet is greater than p1. If yes, go to step 506; otherwise, go to step 507.

[0080] Here, p1 is the second preset value. This step is similar to step 310 above and will not be elaborated here.

[0081] Step 506: Report a failure of the breather valve.

[0082] Step 507: After sampling, calculate the pressure p5 at the water pump inlet.

[0083] Here, p5 is the minimum value among multiple first averages. This step is similar to step 410 above and will not be elaborated here.

[0084] Step 508: Determine whether p5 is less than p6. If yes, go to step 509; otherwise, go to step 510.

[0085] Here, p6 is multiple third preset values. This step is similar to step 420 above and will not be elaborated here.

[0086] Step 509: Report that the water cooling system is normal.

[0087] Step 510: Report that the water cooling system lacks cooling water.

[0088] Step 511: When the operating condition information is in the running state, calculate the pressure at the water pump inlet and the pressure at the water pump outlet.

[0089] This step is similar to step 213 above and will not be elaborated here.

[0090] Step 512: Determine whether the pressure at the inlet and the pressure at the outlet remain unchanged all the time. If yes, go to step 513; otherwise, go to step 514.

[0091] This step is similar to step 214 above and will not be elaborated here.

[0092] Step 513: Report a failure of the pressure sensor.

[0093] Step 514: Calculate the pressure p7 at the water pump inlet.

[0094] Here, p7 is the pressure value at the water pump inlet. This step is similar to step 215 above and will not be elaborated here.

[0095] Step 515: Determine whether p7 is greater than p8 or less than p9. If yes, go to step 516; otherwise, go to step 517.

[0096] Here, p8 is the fifth preset value and p9 is the fourth preset value. This step is similar to step 215 above and will not be elaborated here.

[0097] Step 516: Report a pressure sensor failure.

[0098] Step 517: Determine whether the pressure at the water pump inlet is greater than p2. If so, go to Step 518; otherwise, go to Step 519.

[0099] Here, p2 is the sixth preset value. This step is similar to Step 320 above and will not be elaborated here.

[0100] Step 518: Report a breather valve failure.

[0101] Step 519: After sampling, calculate the pressure p10 at the water pump inlet.

[0102] Here, p10 is the minimum value of multiple second average values. This step is similar to Step 430 above and will not be elaborated here.

[0103] Step 520: Determine whether p10 is less than p11. If so, go to Step 521; otherwise, go to Step 509.

[0104] Here, p11 is the seventh preset value. This step is similar to Step 440 above and will not be elaborated here.

[0105] Step 521: Report that the water cooling system lacks cooling water.

[0106] Figure 6 It is a schematic structural diagram of a water cooling system fault monitoring device provided by an exemplary embodiment of the present application. The water cooling system includes a high-level water tank, a water pump, two pressure sensors, and a breather valve. Among them, the breather valve is arranged on the high-level water tank, and the breather valve opens to reduce the air pressure in the high-level water tank. The two pressure sensors are respectively arranged at the inlet and outlet of the water pump; as Figure 6 shown, the water cooling system fault monitoring device 60 includes: a pressure acquisition module 61 for acquiring the first pressure value at the inlet of the water pump and the second pressure value at the outlet; a first determination module 62 for determining the state of the pressure sensor according to the first pressure value and the second pressure value; a second determination module 63 for determining the state of the breather valve when the state of the pressure sensor is normal; and a third determination module 64 for determining the cooling water volume of the water cooling system according to the first pressure value when the state of the breather valve is normal.

[0107] A fault monitoring device for a water cooling system provided by the present application. The water cooling system includes a high-level water tank, a water pump, two pressure sensors, and a breather valve. Among them, the breather valve is arranged on the high-level water tank, and the breather valve is opened to reduce the air pressure in the high-level water tank. The two pressure sensors are respectively arranged at the water inlet and the water outlet of the water pump. The present application obtains a first pressure value at the water inlet of the water pump and a second pressure value at the water outlet through a pressure acquisition module 61. A first determination module 62 determines the state of the pressure sensor according to the first pressure value and the second pressure value. When the state of the pressure sensor is normal, a second determination module 63 determines the state of the breather valve. And when the state of the breather valve is normal, a third determination module 64 determines the cooling water volume of the water cooling system according to the first pressure value. That is, first, two pressure sensors arranged at the water inlet and the water outlet of the water pump are used to respectively collect the first pressure value at the water inlet of the water pump and the second pressure value at the water outlet in real time. Then, according to the first pressure value and the second pressure value, the states of the pressure sensor, the breather valve, and the cooling water volume are judged in sequence. It can not only pre-detect or timely detect the abnormal state of the water cooling system, but also determine the cause of the fault and the corresponding faulty component according to the collected data, so as to provide guidance and direction for rapid maintenance.

[0108] Figure 7 It is a schematic structural diagram of a fault monitoring device for a water cooling system provided by another exemplary embodiment of the present application. As Figure 7 shown, the fault monitoring device 60 for the water cooling system may further include: a working condition acquisition module 65, configured to acquire the working condition information of the water cooling system. Correspondingly, the first determination module 62 may be further configured to: determine the state of the pressure sensor according to the working condition information, the first pressure value, and the second pressure value.

[0109] In one embodiment, as Figure 7 shown, the first determination module 62 may include: a static pressure difference calculation unit 621, configured to calculate the pressure difference between the first pressure value and the second pressure value when the working condition information is in a stopped state; a static determination unit 622, configured to determine that the state of the pressure sensor is normal when the pressure difference is less than a first preset value.

[0110] In one embodiment, the second determination module 63 may be further configured to: determine that the state of the breather valve is normal when the first pressure value is less than a second preset value.

[0111] In one embodiment, the third determination module 64 may be further configured to: calculate the average value of the first pressure values within a plurality of first preset time periods to obtain a plurality of first average values, and determine that the water cooling system lacks cooling water when the minimum value among the plurality of first average values is less than a third preset value.

[0112] In one embodiment, as Figure 7As shown in the figure, the first determination module 62 may include: a dynamic pressure acquisition unit 623, configured to acquire a plurality of first pressure values and a plurality of second pressure values within a second preset time period when the working condition information is in an operating state; a dynamic pressure difference calculation unit 624, configured to calculate a pressure difference between the first pressure value and the second pressure value at the same moment when the standard deviation of the plurality of first pressure values within the second preset time period is not zero and the standard deviation of the plurality of second pressure values within the second preset time period is not zero; a dynamic determination unit 625, configured to determine that the state of the pressure sensor is normal when the pressure difference is greater than a fourth preset value and less than a fifth preset value, where the fourth preset value is less than the fifth preset value.

[0113] In one embodiment, the second determination module 63 may be further configured to: determine that the state of the breather valve is normal when the first pressure value is less than a sixth preset value.

[0114] In one embodiment, the third determination module 64 may be further configured to: calculate the average value of the first pressure values within a plurality of third preset time periods to obtain a plurality of second average values, and determine that the water cooling system lacks cooling water when the minimum value of the plurality of second average values is less than a seventh preset value, where the seventh preset value is related to the ambient temperature.

[0115] The present application further provides a water cooling system, including: a high-level water tank; a breather valve disposed on the high-level water tank, and the breather valve is opened to reduce the air pressure in the high-level water tank; a water pump; two pressure sensors respectively disposed at the water inlet and the water outlet of the water pump; and the water cooling system fault monitoring device as described above.

[0116] A water cooling system provided by the present application, the water cooling system includes a high-level water tank, a water pump, two pressure sensors and a breather valve, wherein the breather valve is disposed on the high-level water tank, and the breather valve is opened to reduce the air pressure in the high-level water tank, and the two pressure sensors are respectively disposed at the water inlet and the water outlet of the water pump; the present application determines the state of the pressure sensor by acquiring the first pressure value at the water inlet of the water pump and the second pressure value at the water outlet; determines the state of the breather valve according to the first pressure value and the second pressure value; and determines the cooling water volume of the water cooling system according to the first pressure value when the state of the breather valve is normal; that is, first, two pressure sensors disposed at the water inlet and the water outlet of the water pump are used to respectively and real-time collect the first pressure value at the water inlet of the water pump and the second pressure value at the water outlet, and then the states of the pressure sensor, the breather valve and the cooling water volume are sequentially judged according to the first pressure value and the second pressure value, which can not only pre-detect or timely detect the abnormal state of the water cooling system, but also determine the cause of the fault and the corresponding faulty component according to the collected data, so as to provide guidance and direction for quick maintenance.

[0117] The present application also provides a wind turbine generator set, including: the water cooling system as described above.

[0118] A wind turbine generator set provided by the present application, the water cooling system includes a high-level water tank, a water pump, two pressure sensors and a breathing valve. Wherein, the breathing valve is arranged on the high-level water tank, and the breathing valve is opened to reduce the air pressure in the high-level water tank. The two pressure sensors are respectively arranged at the water inlet and the water outlet of the water pump. The present application obtains a first pressure value at the water inlet of the water pump and a second pressure value at the water outlet; determines the state of the pressure sensor according to the first pressure value and the second pressure value; when the state of the pressure sensor is normal, determines the state of the breathing valve; and when the state of the breathing valve is normal, determines the cooling water volume of the water cooling system according to the first pressure value. That is, first, two pressure sensors arranged at the water inlet and the water outlet of the water pump are used to respectively collect the first pressure value at the water inlet of the water pump and the second pressure value at the water outlet in real time, and then the states of the pressure sensor, the breathing valve and the cooling water volume are sequentially judged according to the first pressure value and the second pressure value. It can not only monitor the abnormal state of the water cooling system in advance or in time, but also determine the cause of the fault and the corresponding faulty component according to the collected data, so as to provide guidance and direction for rapid maintenance.

[0119] Next, refer to Figure 8 to describe the electronic device according to an embodiment of the present application. The electronic device can be any one or both of the first device and the second device, or a stand-alone device independent of them. The stand-alone device can communicate with the first device and the second device to receive the input signals collected from them.

[0120] Figure 8 The block diagram of the electronic device according to an embodiment of the present application is illustrated.

[0121] As Figure 8 shown, the electronic device 10 includes one or more processors 11 and a memory 12.

[0122] The processor 11 can be a central processing unit (CPU) or other forms of processing units with data processing capabilities and / or instruction execution capabilities, and can control other components in the electronic device 10 to perform desired functions.

[0123] The memory 12 may include one or more computer program products, and the computer program products may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory, etc. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage media, and the processor 11 may run the program instructions to implement the methods of the various embodiments of the present application described above and / or other desired functions. Various contents such as input signals, signal components, noise components, etc. may also be stored in the computer-readable storage media.

[0124] In one example, the electronic device 10 may further include: an input device 13 and an output device 14, and these components are interconnected through a bus system and / or other forms of connection mechanisms (not shown).

[0125] When the electronic device is a stand-alone device, the input device 13 may be a communication network connector for receiving the collected input signals from the first device and the second device.

[0126] In addition, the input device 13 may further include, for example, a keyboard, a mouse, and so on.

[0127] The output device 14 may output various information to the outside, including the determined distance information, direction information, etc. The output device 14 may include, for example, a display, a speaker, a printer, and a communication network and its connected remote output devices, and so on.

[0128] Of course, for simplicity, Figure 8 only some of the components related to the present application in the electronic device 10 are shown, and components such as buses, input / output interfaces, etc. are omitted. In addition, according to specific application scenarios, the electronic device 10 may further include any other appropriate components.

[0129] The computer program products may be written in any combination of one or more programming languages for programming code to perform the operations of the embodiments of the present application. The programming languages include object-oriented programming languages such as Java, C++, etc., and also include conventional procedural programming languages such as the "C" language or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, executed as an independent software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0130] The computer-readable storage medium may adopt any combination of one or more readable media. The readable media may be a readable signal medium or a readable storage medium. The readable storage medium may include, for example, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0131] The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the form disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize some of their variations, modifications, alterations, additions, and sub-combinations.

Claims

1. A method for monitoring faults of a water cooling system, characterized in that, the water cooling system includes a high-level water tank, a water pump, two pressure sensors and a breather valve. Among them, the high-level water tank supplies water by the self-weight of water, the breather valve is arranged on the high-level water tank, the breather valve opens to reduce the air pressure in the high-level water tank, and the two pressure sensors are respectively arranged at the water inlet and the water outlet of the water pump; the method for monitoring faults of the water cooling system includes: obtaining a first pressure value at the water inlet of the water pump and a second pressure value at the water outlet, as well as the working condition information of the water cooling system; the working condition information is used to determine whether the water pump is in a working state; when the working condition information is in a stopped state, if the pressure difference between the first pressure value and the second pressure value is less than a first preset value, it is determined that the state of the pressure sensor is normal; when the state of the pressure sensor is normal, if the first pressure value is less than a second preset value, it is determined that the state of the breather valve is normal; and when the state of the breather valve is normal, if the first pressure value is not greater than a third preset value, it is determined that the water cooling system lacks cooling water; when the working condition information is in an operating state, if the pressure difference is greater than a fourth preset value and less than a fifth preset value, it is determined that the state of the pressure sensor is normal; when the state of the pressure sensor is normal, if the first pressure value is less than a sixth preset value, it is determined that the state of the breather valve is normal; and when the state of the breather valve is normal, if the first pressure value is not greater than a seventh preset value, it is determined that the water cooling system does not lack cooling water.

2. The method for monitoring faults of a water cooling system according to claim 1, characterized in that, the method includes: when the working condition information is in a stopped state, calculating the average value of the first pressure value in a plurality of first preset time periods to obtain a plurality of first average values; and when the minimum value among the plurality of first average values is less than the third preset value, it is determined that the water cooling system lacks cooling water.

3. The method for monitoring faults of a water cooling system according to claim 1, characterized in that, the method further includes: when the working condition information is in an operating state, obtaining a plurality of the first pressure values and a plurality of the second pressure values within a second preset time period; when the standard deviation of the plurality of first pressure values within the second preset time period is not zero and the standard deviation of the plurality of second pressure values within the second preset time period is not zero, calculating the pressure difference between the first pressure value and the second pressure value at the same moment; and when the pressure difference is greater than a fourth preset value and less than a fifth preset value, it is determined that the state of the pressure sensor is normal; wherein, the fourth preset value is less than the fifth preset value.

4. The method for monitoring faults of a water cooling system according to claim 3, characterized in that, determining whether the water cooling system lacks cooling water according to the first pressure value includes: calculating the average value of the first pressure value in a plurality of third preset time periods to obtain a plurality of second average values; and When the minimum value among multiple said second average values is less than a seventh preset value, it is determined that the water cooling system lacks cooling water; wherein, the seventh preset value is related to the ambient temperature.

5. A fault monitoring device for a water cooling system, characterized in that the water cooling system includes a high-level water tank, a water pump, two pressure sensors and a breather valve, wherein the high-level water tank supplies water by the self-weight of water, the breather valve is arranged on the high-level water tank, the breather valve opens to reduce the air pressure in the high-level water tank, and the two pressure sensors are respectively arranged at the water inlet and the water outlet of the water pump; the fault monitoring device for the water cooling system includes: a pressure acquisition module, configured to acquire a first pressure value at the water inlet of the water pump and a second pressure value at the water outlet of the water pump, as well as the operating condition information of the water cooling system; the operating condition information is used to determine whether the water pump is in an operating state; When the operating condition information is in a stopped state, a first determination module, configured to, when the state of the pressure sensor is normal, if the first pressure value is less than a second preset value, determine that the state of the breather valve is normal; a second determination module, configured to, when the state of the pressure sensor is normal, if the first pressure value is less than a second preset value, determine that the state of the breather valve is normal; a third determination module, configured to, when the state of the breather valve is normal, if the first pressure value is not greater than a third preset value, determine that the water cooling system lacks cooling water; When the operating condition information is in an operating state, a first determination module, configured to, if the pressure difference is greater than a fourth preset value and less than a fifth preset value, determine that the state of the pressure sensor is normal; the second determination module, configured to, when the state of the pressure sensor is normal, if the first pressure value is less than a sixth preset value, determine that the state of the breather valve is normal; the third determination module, configured to, when the state of the breather valve is normal, if the first pressure value is not greater than a seventh preset value, determine that the water cooling system does not lack cooling water.

6. A water cooling system, characterized in that it includes: a high-level water tank, and the high-level water tank supplies water by the self-weight of water; a breather valve, the breather valve is arranged on the high-level water tank, and the breather valve opens to reduce the air pressure in the high-level water tank; a water pump; two pressure sensors, and the two pressure sensors are respectively arranged at the water inlet and the water outlet of the water pump; and the fault monitoring device for the water cooling system as described in claim 5.

7. A wind turbine generator set, characterized in that it includes: the water cooling system as described in claim 6.

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