Fault detection method, device, storage medium and electronic equipment

Abstract

The present disclosure relates to the field of wind power, and in particular to a fault detection method, device, storage medium and electronic device for detecting whether a hydraulic system of a wind turbine has a fault. The method comprises: determining the main system pressure and rotor brake pressure of the hydraulic system of the wind turbine; generating a pressure build-up test curve and a pressure relief test curve according to the main system pressure and the rotor brake pressure; and determining whether the hydraulic system of the wind turbine has a fault according to the pressure build-up test curve and the pressure relief test curve.

Description

Technical Field

[0001] The present disclosure relates to the field of wind power, and in particular to a fault detection method, device, storage medium and electronic equipment. Background Art

[0002] The hydraulic system used by wind turbines is mainly composed of hydraulic pumps, hydraulic motors, electromagnetic reversing valves, relief valves, accumulators, throttle valves, and pipelines. As the unit ages, the hydraulic station will have problems such as low accumulator bladder pre-charge pressure, accumulator bladder damage, relief valve damage, electromagnetic valve jamming, oil pump damage, and pipeline blockage.

[0003] Due to the limitation of the hardware of the unit, the fault detection of components can only be carried out on-site by the staff, and the components of the wind turbine are replaced until the fault point is found. This detection method is not only labor-intensive, but also wastes a lot of time and production costs. Summary of the invention

[0004] According to a first aspect of an embodiment of the present disclosure, a fault detection method is provided, including:

[0005] Determine the main system pressure and rotor brake pressure of the wind turbine hydraulic system;

[0006] generating a pressure build-up test curve and a pressure relief test curve according to the main system pressure and the rotor brake pressure;

[0007] It is determined whether there is a fault in the hydraulic system of the wind turbine generator set according to the pressure build-up test curve and the pressure relief test curve.

[0008] Optionally, determining whether there is a fault in the hydraulic system of the wind turbine generator set according to the pressure build-up test curve and the pressure relief test curve includes:

[0009] Determine, according to the pressure build-up test curve, whether the pressure curve corresponding to the main system pressure has an inflection point;

[0010] If the pressure curve corresponding to the main system pressure has no inflection point, it is determined that a main accumulator of the hydraulic system of the wind turbine generator set is faulty;

[0011] If the pressure curve corresponding to the main system pressure has an inflection point, determining the pressure value corresponding to the inflection point;

[0012] When the pressure value corresponding to the inflection point is less than a preset inflection point pressure value, determining that the main accumulator has a fault;

[0013] Determine the time it takes for the main system pressure to increase from an initial value to a target pressure value according to the pressure build-up test curve;

[0014] When the time period is not within the preset time period, it is determined that a fault exists in the main energy storage device.

[0015] Optionally, determining whether there is a fault in the hydraulic system of the wind turbine generator set according to the pressure build-up test curve and the pressure relief test curve includes:

[0016] Determining whether the rotor brake pressure is attenuated according to the pressure relief test curve;

[0017] When the rotor brake pressure is attenuated, it is determined that a rotor brake accumulator of the hydraulic system of the wind turbine generator set is faulty.

[0018] Optionally, determining whether there is a fault in the hydraulic system of the wind turbine generator set according to the pressure build-up test curve and the pressure relief test curve includes:

[0019] Determining the maximum value of the main system pressure according to the pressure building test curve;

[0020] When the maximum value is not within the preset range, it is determined that a relief valve of the hydraulic system of the wind turbine generator set is faulty.

[0021] Optionally, determining whether there is a fault in the hydraulic system of the wind turbine generator set according to the pressure build-up test curve and the pressure relief test curve includes:

[0022] When the maximum value is smaller than a preset value, it is determined that a fault exists in the hydraulic gear pump of the hydraulic system of the wind turbine generator set.

[0023] Optionally, determining whether there is a fault in the hydraulic system of the wind turbine generator set according to the pressure build-up test curve and the pressure relief test curve includes:

[0024] According to the pressure build-up test curve, determining whether the pressure curve corresponding to the main system pressure and the pressure curve corresponding to the rotor brake pressure overlap after a preset time point;

[0025] When the pressure curve corresponding to the main system pressure and the pressure curve corresponding to the rotor brake pressure overlap after a preset time point, it is determined that a pressure sensor of the hydraulic system of the wind turbine generator set is faulty; and / or

[0026] Determining whether the main system pressure decays to 0 according to the pressure relief test curve;

[0027] When the main system pressure has not decayed to 0, it is determined that a pressure sensor of the hydraulic system of the wind turbine generator set is faulty.

[0028] Optionally, determining whether there is a fault in the hydraulic system of the wind turbine generator set according to the pressure build-up test curve and the pressure relief test curve includes:

[0029] Determining, based on the pressure building test curve, whether the pressure curve corresponding to the main system pressure satisfies a preset smoothing condition;

[0030] When the pressure curve corresponding to the main system pressure does not satisfy the preset smoothness condition, it is determined that a throttle valve of the hydraulic system of the wind turbine generator set is faulty.

[0031] According to a second aspect of an embodiment of the present disclosure, there is provided a fault detection device, comprising:

[0032] A first determination module is used to determine the main system pressure and rotor brake pressure of the hydraulic system of the wind turbine generator set;

[0033] A curve generating module, used for generating a pressure build-up test curve and a pressure relief test curve according to the main system pressure and the rotor brake pressure;

[0034] The second determination module is used to determine whether there is a fault in the hydraulic system of the wind turbine generator set according to the pressure build-up test curve and the pressure relief test curve.

[0035] According to a third aspect of an embodiment of the present disclosure, there is provided a non-temporary computer-readable medium on which a computer program is stored, and when the program is executed by a processor, the steps of the method described in the first aspect are implemented.

[0036] According to a fourth aspect of an embodiment of the present disclosure, a device is provided, including:

[0037] a memory having a computer program stored thereon;

[0038] A processor is used to execute the computer program in the memory to implement the steps of the method described in the first aspect.

[0039] Through the above technical solution, the real-time data collection function of the wind turbine is utilized to generate a pressure build-up test curve and a pressure relief test curve according to the main system pressure and the rotor brake pressure during the hydraulic system pressure relief and pressure measurement process, and visualize the main system pressure and the rotor brake pressure of the hydraulic system. Then, it is determined whether there is a fault in the hydraulic system of the wind turbine according to the pressure build-up test curve and the pressure relief test curve. In this way, the difficulty of fault handling is reduced, the efficiency of fault detection is improved, and the cost of purchasing spare parts is saved. In addition, the status of the hydraulic system components can be monitored according to the changing trend of the pressure build-up test curve and the pressure relief test curve, and preventive measures can be taken in advance, thereby increasing the service life of the wind turbine.

[0040] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0042] Figure 1 The figure is a flow chart showing a fault detection method according to an exemplary embodiment.

[0043] Figure 2 is a flow chart of a fault detection method according to another exemplary embodiment.

[0044] Figure 3 It is a block diagram of a fault detection device according to an exemplary embodiment.

[0045] Figure 4 It is a block diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0046] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0047] The inventors found that in the prior art, the unit monitoring interface can only observe the main system pressure and rotor brake pressure. When components are damaged, the wind turbine will report faults such as "low main system pressure, too long hydraulic pump working time, low rotor brake pressure", but it is impossible to determine which component is damaged. In addition, during the replacement of spare parts, if dust falls into the hydraulic system, it will cause secondary damage to the hydraulic station. More importantly, the failure and shutdown of the wind turbine will affect the power generation, thereby causing greater economic losses.

[0048] In view of this, the present disclosure provides a fault detection method, device, storage medium and electronic device to solve the above technical problems.

[0049] Figure 1 A fault detection method according to an exemplary embodiment includes the following steps:

[0050] In step S101, the main system pressure and the rotor brake pressure of the hydraulic system of the wind turbine are determined.

[0051] In step S102, a pressure build-up test curve and a pressure relief test curve are generated according to the main system pressure and the rotor brake pressure.

[0052] In step S103, it is determined whether there is a fault in the hydraulic system of the wind turbine generator set according to the pressure build-up test curve and the pressure relief test curve.

[0053] First of all, it should be understood that the wind turbine is equipped with a hydraulic system, which is responsible for the yaw braking and impeller braking functions, and is the safety guarantee of the wind turbine. The wind turbine uses PLC to realize the control and data collection of the hydraulic system. The hydraulic system includes two accumulators: the main system accumulator and the rotor brake accumulator. The accumulator is used to store energy.

[0054] A wind farm can include a SCADA system (Supervisory Control And Data Acquisition) that can be connected to each wind turbine. The SCADA system is installed with PLC (programmable logic controller) configuration software TwinCAT, which can be programmed and installed on the SCADA system. The ADS communication developed by Beckhoff can then be used to communicate with the PLCs of all wind turbines with the help of TwinCAT, thereby achieving control and monitoring of the hydraulic systems of all wind turbines.

[0055] For example, the determination of the rotor brake pressure can be carried out in the fault test mode (i.e. after the wind turbine is safely shut down), by transmitting instructions to the PLC through ADS communication, controlling the hydraulic system to release pressure to release the main system pressure, and reading the pressure value collected by the PLC within 0 to 25 seconds in this process, and generating a pressure change curve within 25 seconds, i.e., a pressure relief test curve. After the pressure relief is completed, an instruction is transmitted to the PLC through ADS communication to control the hydraulic system to build pressure, and reading the pressure value collected by the PLC within 0 to 25 seconds in this process, and generating a pressure change curve within 25 seconds, i.e., a pressure build-up test curve. Of course, the pressure values ​​within 0 to 30 seconds or 0 to 35 seconds can also be collected separately, and the embodiments of the present disclosure are not limited to this.

[0056] Through the above method, the real-time data collection function of the wind turbine is utilized to generate a pressure build-up test curve and a pressure relief test curve according to the main system pressure and the rotor brake pressure during the hydraulic system pressure relief and pressure measurement process, and visualize the main system pressure and the rotor brake pressure of the hydraulic system. Then, it is determined whether there is a fault in the hydraulic system of the wind turbine according to the pressure build-up test curve and the pressure relief test curve. In this way, the difficulty of fault handling is reduced, the efficiency of fault detection is improved, and the cost of spare parts procurement is saved. In addition, the status of the hydraulic system components can be monitored according to the change trend of the pressure build-up test curve and the pressure relief test curve, and preventive measures can be taken in advance, thereby increasing the service life of the wind turbine.

[0057] In a possible manner, determining whether there is a fault in the hydraulic system of a wind turbine generator set according to the pressure build-up test curve and the pressure relief test curve can be performed by first determining whether the pressure curve corresponding to the main system pressure has an inflection point according to the pressure build-up test curve. If the pressure curve corresponding to the main system pressure has no inflection point, it is determined that there is a fault in the main accumulator of the hydraulic system of the wind turbine generator set. If there is an inflection point in the pressure curve corresponding to the main system pressure, the pressure value corresponding to the inflection point is determined. If the pressure value corresponding to the inflection point is less than the preset inflection point pressure value, it is determined that there is a fault in the main accumulator. According to the pressure build-up test curve, the time for the main system pressure to change from the initial value to the target pressure value is determined. If the time is not within the preset time, it is determined that there is a fault in the main accumulator.

[0058] It should be understood that the interior of the accumulator is composed of a bladder and nitrogen. The nitrogen inside the accumulator needs to be filled regularly. The nitrogen pressure after filling is the pre-charge pressure. With the increase of years, the pre-charge pressure will gradually decay. Therefore, it is possible to judge whether the main accumulator is faulty based on whether the pre-charge pressure decays, and the degree of damage to the main accumulator can be further judged based on the degree of decay of the pre-charge pressure. In addition, the main system pressure refers to the working pressure of the hydraulic oil of the hydraulic station itself, so the pre-charge pressure can be determined based on the main system pressure that can be monitored in real time by the PLC of the wind turbine.

[0059] For example, during the pressure building process of the hydraulic station, the oil filling amount of the main accumulator has been less than the accumulator capacity for a period of time. When the nitrogen inside the bladder and the hydraulic oil pressure outside the bladder are just balanced, it is a sudden change moment. At this sudden change moment, the oil filling amount of the main accumulator is equal to the main accumulator capacity, and the nitrogen inside the bladder and the hydraulic oil pressure outside the bladder are just balanced, so the hydraulic oil pressure at this time (i.e., the main system pressure) is equal to the nitrogen pressure in the pre-charge pressure accumulator bladder (i.e., the pre-charge pressure). After this sudden change moment, the bladder in the accumulator begins to compress, and it is difficult to pressurize the main accumulator, and the pressure increase speed in the main accumulator begins to slow down significantly. Therefore, if the pressure curve corresponding to the main system pressure has no inflection point, it means that there is a fault in the main accumulator of the wind turbine hydraulic system, resulting in the main accumulator being unable to store nitrogen.

[0060] It should also be understood that the preset inflection point pressure value can be the pressure value in the main accumulator when the main accumulator is full. If there is no fault in the main accumulator, at the moment of mutation (i.e., at the inflection point), the main system pressure is equal to the preset inflection point pressure value. Therefore, when the pressure value corresponding to the inflection point is less than the preset inflection point pressure value, it is determined that the main accumulator has a fault, and the fault will cause insufficient energy storage. Specifically, for a 120bar accumulator, it is required to charge the accumulator pressure to 120bar. If the pressure value corresponding to the inflection point deviates too much from 120bar, it will cause a wind turbine failure. In the present disclosure, the preset inflection point pressure value can be 70bar. Of course, it can also be adjusted according to different accumulators and different working scenarios. The embodiments of the present disclosure are not limited to this.

[0061] For example, the initial value of the main system pressure can be 0 bar, and the target pressure can be 150 bar, so as to fully pressurize the main accumulator and thereby improve the accuracy of the test. The preset time for the main system pressure to change from the initial value to the target pressure value can be 5 to 13 seconds, which is not limited in the embodiments of the present disclosure.

[0062] In a possible way, determining whether there is a fault in the hydraulic system of the wind turbine generator set based on the pressure build-up test curve and the pressure relief test curve can be done by determining whether there is a decay in the rotor brake pressure based on the pressure relief test curve. When there is a decay in the rotor brake pressure, determining that there is a fault in the rotor brake accumulator of the hydraulic system of the wind turbine generator set.

[0063] It should be understood that the rotor brake accumulator is connected to the main accumulator through a one-way valve. In the fault test mode (i.e. after the wind turbine is safely shut down), the hydraulic system is controlled to release pressure, that is, the main system pressure is released. At this time, the rotor brake pressure is greater than the main system pressure, and the one-way valve is reversely cut off. The rotor brake pressure should remain unchanged. If the one-way valve is damaged, the main accumulator and the rotor brake accumulator are connected, and the rotor brake pressure will gradually decrease. Therefore, according to the pressure relief test curve, when the rotor brake pressure is attenuated, it can be determined that the rotor brake accumulator of the hydraulic system of the wind turbine is faulty.

[0064] In a possible way, whether there is a fault in the hydraulic system of the wind turbine is determined based on the pressure buildup test curve and the pressure relief test curve. The maximum value of the main system pressure can be determined based on the pressure buildup test curve. When the maximum value is not within a preset range, it is determined that there is a fault in the overflow valve of the hydraulic system of the wind turbine.

[0065] It should be understood that the overflow valve in the hydraulic system plays a safety protection role. When the main system pressure exceeds the specified value, the overflow valve will open and discharge part of the gas in the hydraulic system so that the hydraulic system pressure does not exceed the specified value, thereby ensuring that the hydraulic system does not cause accidents due to excessive pressure.

[0066] Therefore, according to the pressure build-up test curve, when the maximum value of the main system pressure is not within the preset range, it can be determined that the overflow valve of the wind turbine hydraulic system is faulty. Specifically, if the maximum value of the main system pressure is greater than the maximum value within the preset range, it means that the overflow valve cannot discharge the gas from the system. If the maximum value of the main system pressure is less than the minimum value within the preset range, it means that the overflow valve opens in advance when the main system pressure does not reach the specified value. In the present disclosure, the preset range can be 165 bar to 175 bar, and the embodiments of the present disclosure are not limited to this.

[0067] In a possible manner, determining whether there is a fault in the hydraulic system of the wind turbine generator set based on the pressure build-up test curve and the pressure relief test curve may be to determine that there is a fault in the hydraulic gear pump of the hydraulic system of the wind turbine generator set when the maximum value is less than a preset value.

[0068] For example, for a wind turbine with a maximum working pressure of 150 bar and a relief valve with an operating pressure of 170 bar, in order to fully test the hydraulic system of the wind turbine and improve the accuracy of the test results, the hydraulic system of the wind turbine can be fully pressurized without triggering the relief valve to work. Therefore, the preset value can be 160 bar, an intermediate value between 150 bar and 170 bar. Of course, corresponding preset values ​​can also be set for different wind turbines and relief valves, and the embodiments of the present disclosure are not limited to this.

[0069] In a possible manner, based on the pressure build-up test curve and the pressure relief test curve, it is determined whether there is a fault in the hydraulic system of the wind turbine set. It can be that based on the pressure build-up test curve, it is determined whether the pressure curve corresponding to the main system pressure and the pressure curve corresponding to the rotor brake pressure coincide after a preset time point. If the pressure curve corresponding to the main system pressure and the pressure curve corresponding to the rotor brake pressure coincide after the preset time point, it is determined that there is a fault in the pressure sensor of the hydraulic system of the wind turbine set. And / or, based on the pressure relief test curve, it is determined whether the main system pressure decays to 0. Then, if the main system pressure has not decayed to 0, it is determined that there is a fault in the pressure sensor of the hydraulic system of the wind turbine set.

[0070] It should be understood that in the test mode, the hydraulic system is first controlled to release pressure, that is, the main system pressure is released, and then the hydraulic system is controlled to build pressure, and the main system pressure increases. Since the one-way valve connected between the main accumulator and the rotor brake accumulator can connect the main system hydraulic circuit and the rotor brake hydraulic circuit, the main system pressure is equal to the rotor brake pressure after a period of time, that is, after a period of time, the main system pressure curve and the rotor brake pressure curve will overlap for a period of time.

[0071] For example, in the present disclosure, since the pressure build-up test curve and the pressure relief test curve are generated according to the pressure value of 0 to 25 seconds during the pressure build-up process and the pressure value of 0 to 25 seconds during the pressure relief process, respectively, the preset time point can be the 5th second. If there is a deviation (non-coincidence) between the main system pressure curve and the rotor brake pressure curve after the 5th second, it means that the sensor has a detection deviation. Since the pressure build-up conditions such as the pressure size and oil temperature of the pressure build-up pumps of different systems are different, the preset time point can be determined according to the actual situation, and the embodiments of the present disclosure are not limited to this.

[0072] It should also be understood that when the pressure sensor is normal and has no faults, when the hydraulic system is controlled to release pressure, the main system pressure can decay from the standard value to 0 bar. Therefore, according to the pressure relief test curve, when the main system pressure has not decayed to 0, it can be determined that the pressure sensor of the wind turbine hydraulic system is faulty. If the main system pressure cannot decay to 0 bar, it means that the pressure sensor is faulty, or the yaw caliper oil circuit, hydraulic valve body, pipeline, etc. are not flowing smoothly, or the hydraulic station heater fails to operate normally in winter. At this time, the staff can go to the site for further inspection to determine which specific device is faulty.

[0073] In a possible manner, determining whether there is a fault in the hydraulic system of a wind turbine generator set based on a pressure build-up test curve and a pressure relief test curve can be performed by determining whether a pressure curve corresponding to the main system pressure satisfies a preset smoothness condition based on the pressure build-up test curve, and then determining that there is a fault in a throttle valve of the hydraulic system of the wind turbine generator set if the pressure curve corresponding to the main system pressure does not satisfy the preset smoothness condition.

[0074] For example, during the pump start-up pressure test, if the curve corresponding to the main system pressure is not smooth and the curve fluctuates up and down repeatedly, it means that the hydraulic pump state is repeatedly started and stopped, indicating that the throttle valve opening of the yaw circuit is too small. The embodiment of the present disclosure does not specifically limit the preset smoothness condition, and the fluctuation range of the pressure curve corresponding to the main system pressure can be determined according to the different hydraulic pumps in specific scenarios. When the curve exceeds the fluctuation range, it is determined that the pressure curve corresponding to the main system pressure does not meet the preset smoothness condition, and then it is determined that the throttle valve of the hydraulic system of the wind turbine set is faulty.

[0075] In another possible manner, before determining the main system pressure and rotor brake pressure in the wind turbine hydraulic system, the status data of the wind turbine hydraulic system can also be obtained, and then based on the status data, it is determined whether there is a fault in the wind turbine hydraulic system. If there is no fault in the wind turbine hydraulic system, the wind turbine hydraulic system is controlled to enter a fault test mode.

[0076] For example, the state data of the hydraulic system of the wind turbine can be obtained first, and then it can be determined whether the state data includes the hydraulic system fault state word (such as error_hydraulic.error_global). If the state data includes the hydraulic system fault state word, it means that the hydraulic system of the wind turbine has a fault, and the hydraulic system of the wind turbine cannot be controlled to perform fault detection. Therefore, it can be determined whether the hydraulic system of the wind turbine has a fault based on the state data, and if the hydraulic system of the wind turbine does not have a fault, the hydraulic system of the wind turbine can be controlled to enter the fault test mode.

[0077] For example, when it is determined that there is a fault in the hydraulic system of the wind turbine, the fault information can be recorded in the hydraulic system status data of the wind turbine in the form of a hydraulic system fault status word. Of course, the fault information can also be recorded in a queryable manner in other ways to avoid invalid fault testing, and the embodiment of the present disclosure does not limit the recording method of the fault information.

[0078] Figure 2 is a flow chart of a fault detection method according to another exemplary embodiment. Figure 2 As shown, the method includes the following processes: maintenance, pump stop pressure relief test, pump start pressure building test and complete recovery.

[0079] Among them, maintenance can be to control the wind turbine to shut down safely and enter the test mode. The pump stop pressure relief test can be to transmit instructions to the PLC through ADS communication, control the hydraulic system to unload the main system pressure, read the pressure value collected by the PLC, and plot the pressure value of 0 to 25s into a pressure relief test curve. The pump start pressure test can be to transmit instructions to the PLC through ADS communication, control the hydraulic system to start pressure building, read the pressure value collected by the PLC, and plot the pressure value of 0 to 25s into a pressure building test curve. Restoring all can be to control the release of excess pressure that is higher than the working pressure of the wind turbine during the pressure building test, so that the main system pressure returns to the normal working value. Then cancel the wind turbine maintenance and control the wind turbine to exit the test mode to ensure that the state of the wind turbine is restored to the same state as before the test.

[0080] The specific implementation methods of the above processes have been described in detail above and will not be repeated here. In addition, it should be understood that for the above method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should know that the present disclosure is not limited to the order of actions described above. Secondly, those skilled in the art should also know that the embodiments described above belong to preferred embodiments, and the steps involved are not necessarily required by the present disclosure.

[0081] Through the above method, the real-time data acquisition function of the wind turbine is utilized to generate a pressure build-up test curve and a pressure relief test curve according to the main system pressure and the rotor brake pressure during the hydraulic system pressure relief and pressure measurement process, and visualize the main system pressure and the rotor brake pressure of the hydraulic system. Then, according to the pressure build-up test curve and the pressure relief test curve, it is determined whether there is a fault in the hydraulic system of the wind turbine and the fault point is determined. In this way, the defects or faulty parts of the hydraulic system can be easily and accurately located, which reduces the difficulty of fault handling, improves the efficiency of fault detection, and saves spare parts procurement expenses. In addition, the status of the hydraulic system components can be monitored according to the changing trends of the pressure build-up test curve and the pressure relief test curve, and prevented in advance, thereby increasing the service life of the wind turbine.

[0082] Figure 3 FIG. 3 is a block diagram of a fault detection device 300 according to an exemplary embodiment. Figure 3 The device includes a first determination module 301 , a curve generation module 302 and a second determination module 303 .

[0083] The first determination module 301 is used to determine the main system pressure and rotor brake pressure of the hydraulic system of the wind turbine generator set;

[0084] A curve generating module 302, configured to generate a pressure build-up test curve and a pressure relief test curve according to the main system pressure and the rotor brake pressure;

[0085] The second determination module 303 is used to determine whether there is a fault in the hydraulic system of the wind turbine generator set according to the pressure build-up test curve and the pressure relief test curve.

[0086] Optionally, the second determining module 303 is used to:

[0087] Determine, according to the pressure build-up test curve, whether the pressure curve corresponding to the main system pressure has an inflection point;

[0088] If the pressure curve corresponding to the main system pressure has no inflection point, it is determined that a main accumulator of the hydraulic system of the wind turbine generator set is faulty;

[0089] If the pressure curve corresponding to the main system pressure has an inflection point, determining the pressure value corresponding to the inflection point;

[0090] When the pressure value corresponding to the inflection point is less than a preset inflection point pressure value, determining that the main accumulator has a fault;

[0091] Determine the time it takes for the main system pressure to increase from an initial value to a target pressure value according to the pressure build-up test curve;

[0092] When the time period is not within the preset time period, it is determined that a fault exists in the main energy storage device.

[0093] Optionally, the second determining module 303 is used to:

[0094] Determining whether the rotor brake pressure is attenuated according to the pressure relief test curve;

[0095] When the rotor brake pressure is attenuated, it is determined that a rotor brake accumulator of the hydraulic system of the wind turbine generator set is faulty.

[0096] Optionally, the second determining module 303 is used to:

[0097] Determining the maximum value of the main system pressure according to the pressure building test curve;

[0098] When the maximum value is not within the preset range, it is determined that a relief valve of the hydraulic system of the wind turbine generator set is faulty.

[0099] Optionally, the second determining module 303 is used to:

[0100] When the maximum value is smaller than a preset value, it is determined that a fault exists in the hydraulic gear pump of the hydraulic system of the wind turbine generator set.

[0101] Optionally, the second determining module 303 is used to:

[0102] According to the pressure build-up test curve, determining whether the pressure curve corresponding to the main system pressure and the pressure curve corresponding to the rotor brake pressure overlap after a preset time point;

[0103] When the pressure curve corresponding to the main system pressure and the pressure curve corresponding to the rotor brake pressure overlap after a preset time point, it is determined that a pressure sensor of the hydraulic system of the wind turbine generator set is faulty; and / or

[0104] Determining whether the main system pressure decays to 0 according to the pressure relief test curve;

[0105] When the main system pressure has not decayed to 0, it is determined that a pressure sensor of the hydraulic system of the wind turbine generator set is faulty.

[0106] Optionally, the second determining module 303 is used to:

[0107] Determining, based on the pressure building test curve, whether the pressure curve corresponding to the main system pressure satisfies a preset smoothing condition;

[0108] When the pressure curve corresponding to the main system pressure does not satisfy the preset smoothness condition, it is determined that a throttle valve of the hydraulic system of the wind turbine generator set is faulty.

[0109] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0110] Based on the same inventive concept, an embodiment of the present disclosure further provides a non-temporary computer-readable medium on which a computer program is stored. When the program is executed by a processor, the steps of the fault detection method provided by the present disclosure are implemented.

[0111] Figure 4 FIG. 4 is a block diagram of an electronic device 400 according to an exemplary embodiment. Figure 4 As shown, the electronic device 400 may include: a processor 401 and a memory 402. The electronic device 400 may also include one or more of a multimedia component 403, an input / output (I / O) interface 404, and a communication component 405.

[0112] The processor 401 is used to control the overall operation of the electronic device 400 to complete all or part of the steps in the above-mentioned fault detection method. The memory 402 is used to store various types of data to support the operation of the electronic device 400, and these data may include, for example, instructions for any application or method used to operate on the electronic device 400, and application-related data, such as contact data, sent and received messages, pictures, audio, video, etc. The memory 402 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, referred to as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, referred to as EEPROM), erasable programmable read-only memory (Erasable Programmable Read-Only Memory, referred to as EPROM), programmable read-only memory (Programmable Read-Only Memory, referred to as PROM), read-only memory (Read-Only Memory, referred to as ROM), magnetic memory, flash memory, magnetic disk or optical disk. The multimedia component 403 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may be further stored in the memory 402 or sent through the communication component 405. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 404 provides an interface between the processor 401 and other interface modules, and the other interface modules may be keyboards, mice, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 405 is used for wired or wireless communication between the electronic device 400 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, is not limited here. Therefore, the corresponding communication component 405 may include: Wi-Fi module, Bluetooth module, NFC module, etc.

[0113] In an exemplary embodiment, the electronic device 400 can be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors or other electronic components to execute the above-mentioned fault detection method.

[0114] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, and when the program instructions are executed by a processor, the steps of the above-mentioned fault detection method are implemented. For example, the computer-readable storage medium can be the above-mentioned memory 402 including program instructions, and the above-mentioned program instructions can be executed by the processor 401 of the electronic device 400 to complete the above-mentioned fault detection method.

[0115] In another exemplary embodiment, a computer program product is also provided. The computer program product includes a computer program executable by a programmable device, and the computer program has a code portion for executing the above-mentioned fault detection method when executed by the programmable device.

[0116] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0117] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0118] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A fault detection method, It is characterized in that include: Using the real-time data collection function of the wind turbine set, determine the main system pressure during the pressure building process of the wind turbine set hydraulic system and the rotor brake pressure during the pressure relief process; generating a pressure build-up test curve and a pressure relief test curve according to the main system pressure and the rotor brake pressure; Determining whether there is a fault in the hydraulic system of the wind turbine generator set according to the pressure build-up test curve and the pressure relief test curve; Determining whether there is a fault in the hydraulic system of the wind turbine generator set according to the pressure build-up test curve and the pressure relief test curve includes: Determine, according to the pressure build-up test curve, whether the pressure curve corresponding to the main system pressure has an inflection point; If the pressure curve corresponding to the main system pressure has no inflection point, it is determined that a main accumulator of the hydraulic system of the wind turbine generator set is faulty; If the pressure curve corresponding to the main system pressure has an inflection point, determining the pressure value corresponding to the inflection point; When the pressure value corresponding to the inflection point is less than a preset inflection point pressure value, determining that the main accumulator has a fault; Determine the time it takes for the main system pressure to increase from an initial value to a target pressure value according to the pressure build-up test curve; When the time period is not within the preset time period, it is determined that a fault exists in the main energy storage device.

2. The method according to claim 1, It is characterized in that Determining whether there is a fault in the hydraulic system of the wind turbine generator set according to the pressure build-up test curve and the pressure relief test curve includes: Determining whether the rotor brake pressure is attenuated according to the pressure relief test curve; When the rotor brake pressure is attenuated, it is determined that a rotor brake accumulator of the hydraulic system of the wind turbine generator set is faulty.

3. The method according to claim 1, It is characterized in that Determining whether there is a fault in the hydraulic system of the wind turbine generator set according to the pressure build-up test curve and the pressure relief test curve includes: Determining the maximum value of the main system pressure according to the pressure building test curve; When the maximum value is not within the preset range, it is determined that a relief valve of the hydraulic system of the wind turbine generator set is faulty.

4. The method according to claim 3, It is characterized in that Determining whether there is a fault in the hydraulic system of the wind turbine generator set according to the pressure build-up test curve and the pressure relief test curve includes: When the maximum value is smaller than a preset value, it is determined that a fault exists in the hydraulic gear pump of the hydraulic system of the wind turbine generator set.

5. The method according to claim 1, It is characterized in that Determining whether there is a fault in the hydraulic system of the wind turbine generator set according to the pressure build-up test curve and the pressure relief test curve includes: According to the pressure build-up test curve, determining whether the pressure curve corresponding to the main system pressure and the pressure curve corresponding to the rotor brake pressure overlap after a preset time point; When the pressure curve corresponding to the main system pressure and the pressure curve corresponding to the rotor brake pressure overlap after a preset time point, it is determined that a pressure sensor of the hydraulic system of the wind turbine generator set is faulty; and / or Determining whether the main system pressure decays to 0 according to the pressure relief test curve; When the main system pressure has not decayed to 0, it is determined that a pressure sensor of the hydraulic system of the wind turbine generator set is faulty.

6. The method according to claim 1, It is characterized in that Determining whether there is a fault in the hydraulic system of the wind turbine generator set according to the pressure build-up test curve and the pressure relief test curve includes: Determining, based on the pressure building test curve, whether the pressure curve corresponding to the main system pressure satisfies a preset smoothing condition; When the pressure curve corresponding to the main system pressure does not satisfy the preset smoothness condition, it is determined that a throttle valve of the hydraulic system of the wind turbine generator set is faulty.

7. A fault detection device, It is characterized in that include: The first determination module is used to determine the main system pressure during the pressure building process of the hydraulic system of the wind turbine and the rotor brake pressure during the pressure relief process by using the real-time data collection function of the wind turbine; A curve generating module, used for generating a pressure build-up test curve and a pressure relief test curve according to the main system pressure and the rotor brake pressure; A second determination module is used to determine whether there is a fault in the hydraulic system of the wind turbine generator set according to the pressure build-up test curve and the pressure relief test curve; The second determination module is further used to determine whether the pressure curve corresponding to the main system pressure has an inflection point according to the pressure build-up test curve; if the pressure curve corresponding to the main system pressure has no inflection point, it is determined that there is a fault in the main accumulator of the hydraulic system of the wind turbine set; if the pressure curve corresponding to the main system pressure has an inflection point, the pressure value corresponding to the inflection point is determined; if the pressure value corresponding to the inflection point is less than a preset inflection point pressure value, it is determined that there is a fault in the main accumulator; according to the pressure build-up test curve, the time length for the main system pressure to change from an initial value to a target pressure value is determined; When the time period is not within the preset time period, it is determined that a fault exists in the main energy storage device.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, It is characterized in that When the program is executed by a processor, the steps of the method described in any one of claims 1 to 6 are implemented.

9. An electronic device, It is characterized in that include: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the steps of the method according to any one of claims 1 to 6.

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