Method for judging failure of wind turbine generator system

Abstract

The application provides a wind turbine fault judgment method, and belongs to the technical field of wind power generation. The method comprises the following steps: obtaining real-time data of a wind turbine PLC, obtaining active power of the wind turbine in the real-time data, and determining the active power value of the wind turbine; if the active power of the wind turbine is not greater than zero, determining whether the state code of the wind turbine is a fault; if the state code of the wind turbine is a fault, determining that the current state of the wind turbine is a fault, and determining the duration of the fault; and if the duration of the fault exceeds a first preset threshold, the fault of the wind turbine needs to be handled on site. The wind turbine fault is judged by using the method, the deviation between the judgment result and the actual state of the wind turbine is small, and the judgment result is accurate.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind power generation, and in particular relates to a method for determining faults of a wind power generator set. Background Art

[0002] Wind turbines are the fundamental production units of wind power companies. Since wind turbines can only be built in windy areas, and the direction and speed of high-altitude winds are highly variable, wind turbines operate under variable load conditions for extended periods. Furthermore, in areas with strong winds, the operating environment of wind turbines is even more severe. Under such unfavorable conditions, the probability of wind turbine failure increases; as wind turbine operating time increases, the number of failures that occur during operation increases. Due to the inherent characteristics of the wind energy industry, wind turbines are widely distributed within wind farms and, under normal operation, are unmanned on-site. Therefore, timely and accurate diagnosis of wind turbine failures is a rigid operational requirement for wind power companies. Existing methods for diagnosing wind turbine failures rely on fault signals transmitted by the wind turbine's PLC. This method is simple and single-minded, and the results deviate significantly from the actual status of the wind turbine.

[0003] In view of the above problems, it is necessary to propose a wind turbine fault diagnosis method that is reasonably designed and effectively solves the above problems. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art and provides a method for determining faults of a wind turbine generator set.

[0005] The present invention provides a method for determining a fault of a wind turbine generator set, the method comprising:

[0006] Acquire real-time data from a PLC of a wind turbine generator, obtain active power of the wind turbine generator from the real-time data, and determine the active power value of the wind turbine generator. If the active power of the wind turbine generator is not greater than zero, determine whether the status code of the wind turbine generator is a fault.

[0007] If the status code of the wind turbine is fault, determining that the current status of the wind turbine is fault, and determining the duration of the fault;

[0008] If the duration of the fault exceeds a first preset threshold, the fault of the wind turbine needs to be processed on site.

[0009] Optionally, the determining the active power value of the wind turbine further includes:

[0010] If the active power of the wind turbine generator is greater than zero, determining the real-time rotation speed of the wind turbine generator;

[0011] If the real-time rotation speed of the wind turbine generator is less than the starting rotation speed, it is determined whether the status code of the wind turbine generator is a fault.

[0012] Optionally, the determining whether the status code of the wind turbine is a fault further includes:

[0013] If the status code of the wind turbine generator is not a fault, it is necessary to determine whether the previously calculated status of the wind turbine generator is a fault.

[0014] Optionally, determining whether the previously calculated state of the wind turbine is a fault includes:

[0015] If the previously calculated state of the wind turbine generator is a fault, determining that the wind turbine generator state code does not include a duration of the fault;

[0016] If the wind turbine status code does not include a fault duration that does not exceed a second preset threshold, it is determined that the current state of the wind turbine is a fault.

[0017] Optionally, the method for determining the duration of the fault includes:

[0018] If the duration of the wind turbine fault does not exceed the first preset threshold, it is determined whether the wind turbine status calculated next time is an overhaul / offline state.

[0019] Optionally, determining whether the wind turbine status calculated next time is a maintenance / offline status includes:

[0020] If the wind turbine state calculated next time is the maintenance / offline state, the total duration of the fault and the maintenance / offline state is determined.

[0021] Optionally, determining the total duration of the fault and the maintenance / offline state includes:

[0022] If the total duration of the fault and the maintenance / offline state exceeds a third preset threshold, the fault needs to be processed on site.

[0023] Optionally, both the fault and the maintenance / offline status indicate that the wind turbine is in a non-power generating state.

[0024] Optionally, the first preset threshold, the second preset threshold and the third preset threshold are all thirty minutes.

[0025] The wind turbine generator set fault judgment method of the embodiment of the present invention combines the wind turbine PLC status, the wind turbine active power, and the wind turbine real-time speed to comprehensively judge the wind turbine fault, and after the wind turbine fault state occurs, judges whether the fault requires on-site processing based on the duration of the wind turbine non-power generation state. The wind turbine fault judgment result has a small deviation from the actual state of the wind turbine, and the judgment result is accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The figure is a flow chart of a method for determining faults of a wind turbine generator set according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0028] like Figure 1 As shown, one aspect of the present invention provides a method for recording fault data of a wind turbine generator set, the method comprising:

[0029] Exemplarily, real-time data of the wind turbine PLC is obtained, and the active power of the wind turbine is obtained from the real-time data, and the active power value of the wind turbine is determined. If the active power of the wind turbine is not greater than zero, it is determined whether the status code of the wind turbine is a fault.

[0030] Specifically, after obtaining the active power of the wind turbine generator in the real-time data, the active power is determined. If the active power of the wind turbine generator is not greater than zero, that is, the active power of the wind turbine generator is less than zero or equal to zero, that is, the operating power of the wind turbine generator is less than zero or equal to zero, then it is necessary to determine whether the status code of the wind turbine generator is a fault.

[0031] If the active power of the wind turbine generator is greater than zero, the real-time rotation speed of the wind turbine generator is determined. If the real-time rotation speed of the wind turbine generator is less than the starting rotation speed, whether the status code of the wind turbine generator is a fault is determined.

[0032] Specifically, if the active power of the wind turbine is greater than zero, the real-time rotational speed of the wind turbine is determined. If the real-time rotational speed of the wind turbine is less than the starting speed, that is, if the real-time rotational speed of the wind turbine is less than the rotational speed of the wind turbine when the wind turbine just starts running, the process returns to the previous step to determine whether the status code of the wind turbine is a fault.

[0033] It should be noted that in this embodiment, the real-time data from the wind turbine PLC refers to real-time data on the wind turbine's operation. In this embodiment, the wind turbine starting speed is provided by the wind turbine manufacturer and refers to the speed of the wind turbine when the wind turbine begins operating. In this embodiment, the wind turbine active power refers to the wind turbine's operating power.

[0034] For example, if the status code of the wind turbine is fault, the current status of the wind turbine is determined to be faulty, and the duration of the fault is determined. Specifically, if the status code of the wind turbine is faulty, the duration of the fault is further determined. If the duration is short, no on-site treatment is required. If the duration exceeds a preset threshold, on-site assessment is required.

[0035] For example, if the duration of the fault exceeds a first preset threshold, the fault of the wind turbine needs to be processed on site.

[0036] It should be noted that in this embodiment, the first preset threshold is thirty minutes, but may also be other duration values, which can be set according to actual needs and are not specifically limited in this embodiment. In other words, if the fault lasts for more than thirty minutes, the wind turbine fault needs to be addressed on-site.

[0037] If the status code of the wind turbine generator is not a fault, it is necessary to determine whether the previously calculated status of the wind turbine generator is a fault.

[0038] Specifically, if the previously calculated state of the wind turbine is a fault, the duration of the fault not included in the wind turbine status code is determined; wherein, if the duration of the fault not included in the wind turbine status code does not exceed a second preset threshold, the current state of the wind turbine is determined to be a fault.

[0039] It should be noted that in this embodiment, the second preset threshold is thirty minutes, but may also be other duration values, which can be set according to actual circumstances and are not specifically limited in this embodiment. In other words, if the wind turbine status code does not contain a fault duration of no more than thirty minutes, then the current state of the wind turbine is determined to be a fault.

[0040] Exemplarily, when determining the duration of a wind turbine fault, if the duration of the wind turbine fault does not exceed a first preset threshold, that is, the duration of the wind turbine fault does not exceed thirty minutes, then it is determined whether the next calculated state of the wind turbine is a maintenance / offline state.

[0041] It should be noted that the status of wind turbines are standardized into six types: "operation", "standby", "fault", "maintenance", "power restriction" and "offline". Among them, fault, maintenance and offline are all states where the wind turbine is not generating electricity.

[0042] If the wind turbine state calculated next time is the maintenance / offline state, the total duration of the fault and the maintenance / offline state is determined.

[0043] If the total duration of the fault and the maintenance / offline state exceeds a third preset threshold, the fault needs to be processed on site.

[0044] It should be noted that in this embodiment, the third preset threshold is thirty minutes, but it can also be another duration value and can be set according to actual needs. This embodiment does not impose any specific restrictions. In other words, if the total duration of the fault and maintenance / offline status exceeds thirty minutes, that is, if the wind turbine is in a non-generating state for more than thirty minutes, then on-site fault handling is required.

[0045] This wind turbine fault judgment method combines the wind turbine PLC status, wind turbine active power, and wind turbine real-time speed to comprehensively judge the wind turbine fault. After the wind turbine fault state occurs, it judges whether the fault needs on-site processing based on the duration of the wind turbine non-power generation state. The wind turbine fault judgment result has a small deviation from the actual state of the wind turbine and the judgment result is accurate.

[0046] It will be understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art will appreciate that various modifications and improvements can be made without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A method for determining a fault of a wind turbine generator set, characterized in that: The judgment method includes: Acquire real-time data of a wind turbine PLC, obtain active power of the wind turbine from the real-time data, and determine the active power value of the wind turbine, wherein the real-time data of the wind turbine PLC is real-time data of the operation of the wind turbine; If the active power of the wind turbine generator is not greater than zero, determining whether the status code of the wind turbine generator is a fault; If the active power of the wind turbine generator is greater than zero, determining the real-time rotation speed of the wind turbine generator; If the real-time rotation speed of the wind turbine generator is less than the starting rotation speed, determining whether the status code of the wind turbine generator is a fault; If the status code of the wind turbine is fault, determining that the current status of the wind turbine is fault, and determining the duration of the fault; If the duration of the fault exceeds a first preset threshold, the fault of the wind turbine needs to be processed on site.

2. The method according to claim 1, characterized in that The determining whether the status code of the wind turbine generator is a fault further includes: If the status code of the wind turbine generator is not a fault, it is necessary to determine whether the previously calculated status of the wind turbine generator is a fault.

3. The method according to claim 2, characterized in that The determining whether the previously calculated state of the wind turbine is a fault includes: If the previously calculated state of the wind turbine generator is a fault, determining that the wind turbine generator state code does not include a duration of the fault; If the wind turbine status code does not include a fault duration that does not exceed a second preset threshold, it is determined that the current state of the wind turbine is a fault.

4. The method according to claim 3, characterized in that The determining of the duration of the fault further includes: If the duration of the wind turbine fault does not exceed a first preset threshold, it is determined whether the wind turbine status calculated next time is an overhaul / offline status.

5. The method according to claim 4, characterized in that The determining whether the wind turbine status calculated next time is a maintenance / offline status includes: If the wind turbine generator state calculated next time is the maintenance / offline state, the total duration of the fault and the maintenance / offline state is determined.

6. The method according to claim 5, characterized in that Determining the total duration of the fault and maintenance / offline state includes: If the total duration of the fault and the maintenance / offline state exceeds a third preset threshold, the fault needs to be handled on-site.

7. The method according to claim 5 or 6, characterized in that The fault and maintenance / offline states both indicate that the wind turbine is not generating electricity.

8. The method according to claim 6, characterized in that The first preset threshold, the second preset threshold, and the third preset threshold are all thirty minutes.

Images