CN108900125B - Fault tolerance method and device, computer-readable storage medium - Google Patents

Abstract

The invention discloses a fault tolerance method and device, and a computer-readable storage medium. The fault tolerance method includes: grouping wind turbine faults according to target protection objects. Each group of faults includes multiple process faults associated with the target protection object and target faults of the target protection object; if multiple faults in the same group as the target fault If any one of the process faults reaches the corresponding process fault triggering condition, and the target fault does not reach the corresponding target fault triggering condition, fault-tolerant operation will be performed on the wind turbine generator. By adopting the technical solutions in the embodiments of the present invention, the impact of the faults of each subsystem on the overall system can be incorporated into the fault tolerance strategy, thereby improving the reliability of the wind turbine fault protection mechanism.

Description

Fault tolerance method and device, computer-readable storage medium

technical field

The invention relates to the technical field of wind power generation, in particular to a fault tolerance method and device, and a computer-readable storage medium.

Background technique

The fault protection strategy commonly used by wind turbines is a single fault protection method, which compares the monitoring signal of the wind turbine with the protection boundary, and if the monitoring signal exceeds the protection boundary, it will notify the main controller of the wind turbine to perform shutdown protection operations . In order to enable the wind power generating set to maintain power generation operation in the case of unnecessary shutdown, in the prior art, the fault tolerance processing of the wind generating set is mainly performed by expanding the protection boundary. However, improper expansion of protection boundaries can lead to improper handling of fault tolerance.

In addition, the trend of failure can be suppressed by changing the execution strategy of the controller, but it will affect the performance of the unit.

Therefore, a new fault-tolerant method is needed to improve the reliability of the fault protection mechanism of wind turbines.

Contents of the invention

Embodiments of the present invention provide a fault tolerance method and device, and a computer-readable storage medium, so as to improve the reliability of a fault protection mechanism of a wind power generating set.

In a first aspect, an embodiment of the present invention provides a fault tolerance method, the fault tolerance method includes:

Grouping the faults of the wind turbines according to the target protection object, each group of faults includes multiple process faults associated with the target protection object and the target faults of the target protection object;

If any one of the multiple process faults in the same group as the target fault reaches the corresponding process fault triggering condition, and the target fault does not meet the corresponding target fault triggering condition, the fault-tolerant operation is performed on the wind power generating set.

In a possible implementation manner of the first aspect, after the fault-tolerant operation is performed on the wind power generating set, the method further includes: adjusting an operating parameter of the wind generating set, and restoring the state of the wind generating set to a state where no process fault is triggered.

In a possible implementation of the first aspect, the target protection object includes the IGBT temperature of the converter, and a process fault associated with the IGBT temperature is that the water cooling temperature of the converter exceeds a preset threshold; adjust the operating parameters of the wind power generating set , restore the state of the wind turbine to the state where no process fault is triggered, including: reducing the output power of the wind turbine, or reducing the number of windings involved in the operation of the converter, so as to restore the water cooling temperature of the converter to a preset value below the threshold.

In a possible implementation of the first aspect, after performing the fault-tolerant operation of the wind power generating set, the method further includes: sending a warning message, the warning message including that a process fault has been triggered.

In a possible implementation manner of the first aspect, after the fault-tolerant operation is performed on the wind power generating set, the method further includes: if the target fault reaches the corresponding target fault trigger condition, controlling the wind power generating set to perform shutdown operation, and from Among the triggered process faults in the same group as the target fault, the process fault with the highest correlation degree is selected as the real fault that causes the wind turbine to shut down.

In a possible implementation manner of the first aspect, reaching the corresponding process fault triggering condition includes sampling data related to the process fault meeting corresponding threshold information; failing to reach the corresponding target fault triggering condition includes sampling data related to the target fault The corresponding threshold information is not met.

In a possible implementation of the first aspect, the method further includes: if there are multiple sources of sampling data for the same fault, determining whether the source of the sampling data is correct according to the value of the sampling data; if there are more than two sources If the sampled data is correct, the sampled data from the source with a higher priority among the two or more sources is selected as the sampled data related to the corresponding fault.

In the second aspect, the embodiment of the present invention provides a fault-tolerant device, which includes: a grouping module, which groups the faults of wind power generating sets according to the target protection object, and each group of faults includes multiple processes associated with the target protection object fault and the target fault of the target protection object; the fault tolerance module is used for if any one of the multiple process faults in the same group as the target fault reaches the corresponding process fault trigger condition, and the target fault does not reach the corresponding target fault trigger condition, then Fault-tolerant operation of wind turbines.

In a possible implementation manner of the first aspect, the device further includes an adjustment module, configured to adjust an operating parameter of the wind power generating set, so as to restore the state of the wind power generating set to a state in which no process fault is triggered.

In a possible implementation manner of the first aspect, the device is set in a main controller or a variable flow controller of the wind power generating set.

In a third aspect, an embodiment of the present invention provides a fault tolerance device, including a memory, a processor, and a program stored in the memory and operable on the processor. When the processor executes the program, the above fault tolerance method is implemented.

In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a program is stored, and when the program is executed by a processor, the above-mentioned fault tolerance method is implemented.

As mentioned above, in order to implement the fault-tolerant operation of the wind turbines, the faults of the wind turbines can be grouped according to the target protection object, so that each group of faults includes multiple process faults associated with the target protection object and the target of the target protection object Fault. At the same time, in the embodiment of the present invention, the condition for fault-tolerant operation of the wind power generation unit is: any one of the multiple process faults in the same group as the target fault reaches the corresponding process fault trigger condition, and the target fault does not reach the corresponding target fault trigger condition. condition.

Since process faults can be used to represent the operation of subsystems, and target faults can be used to represent the operation of the overall system. Therefore, compared with the implementation of fault-tolerant operation of wind turbines by expanding the protection boundary in the prior art, the embodiment of the present invention can incorporate the impact of the failure of each subsystem on the overall system into the fault-tolerant strategy, thereby improving the fault protection of wind turbines. reliability of the mechanism.

Description of drawings

The present invention can be better understood from the following description of specific embodiments of the present invention in conjunction with the accompanying drawings, wherein the same or similar reference numerals represent the same or similar features.

Fig. 1 is a schematic flow chart of the fault tolerance method provided by the first embodiment of the present invention;

FIG. 2 is a schematic flowchart of a fault tolerance method provided by a second embodiment of the present invention;

FIG. 3 is a schematic flowchart of a fault tolerance method provided in a third embodiment of the present invention;

4 is a schematic structural diagram of a fault-tolerant device provided by a fourth embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a fault tolerance device provided by a fifth embodiment of the present invention.

Detailed ways

Features and exemplary embodiments of various aspects of the invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention.

The inventors of the present application found that the wind power generating set is a huge system composed of multiple subsystems, and the fault tolerance method in the prior art does not consider the impact of the failure of each subsystem on the overall system, resulting in the reliability of the fault protection mechanism of the wind power generating set Sex is lower. Therefore, the embodiments of the present invention provide a fault tolerance method and device, and a computer-readable storage medium, which are used in the technical field of wind power generation. It mainly performs fault-tolerant processing from the correlation degree of each fault of the entire wind power generating set.

There are many types of faults involved in wind turbines. In one example, the converter water cooling system can be understood as a subsystem of the converter system. The temperature fault of the water cooling liquid will cause the temperature of the power device insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT) in the converter to rise. For example, if the temperature of the water cooling liquid is too high, the heat dissipation effect of the IGBT will become poor, and the temperature of the IGBT will rise sharply, eventually triggering an IGBT temperature fault. By adopting the fault tolerance method in the embodiment of the present invention, the influence of the failure of each subsystem on the overall system can be incorporated into the fault tolerance strategy, and the reliability of the fault protection mechanism of the wind power generating set can be improved.

FIG. 1 is a schematic flowchart of a fault tolerance method provided by a first embodiment of the present invention. As shown in FIG. 1 , the fault tolerance method includes step 101 and step 102 .

In step 101, the faults of the wind power generating sets are grouped according to the target protection object, and each group of faults includes a plurality of process faults associated with the target protection object and target faults of the target protection object.

Among them, the target protection object refers to the protection object closely related to the safe operation of the wind turbine. Combined with the actual operation of the wind turbine, the target protection object may be the speed of the wind turbine, the temperature of the IGBT of the converter, and the like.

In an example, the target protection object includes the temperature of the IGBT of the converter, and the target fault may be an IGBT temperature fault of the converter, which refers to an abnormal situation in which the temperature of the IGBT exceeds a predetermined temperature protection range. The process fault associated with the IGBT temperature of the converter refers to an abnormal situation that can cause the IGBT temperature to exceed a predetermined temperature protection range, such as a converter water cooling liquid temperature fault and a water cooling fan fault.

In step 102, if any one of the multiple process faults in the same group as the target fault reaches the corresponding process fault trigger condition, and the target fault does not meet the corresponding target fault trigger condition, then execute fault-tolerant operation for the wind power generating set.

Among them, fault-tolerant operation refers to that after a process fault is triggered, it can first warn and continue to run without stopping, and then perform shutdown protection on the wind turbine until the target fault is triggered, instead of performing shutdown protection on the wind turbine as soon as a fault is triggered. Therefore, the number of shutdowns of the wind power generating set can be reduced, and the availability of the wind power generating set can be improved.

In the embodiment of the present invention, threshold information may be set for each target fault and multiple related process faults respectively. Reaching the corresponding process fault triggering condition above means that the sampling data related to the process fault meets the corresponding threshold information; failing to reach the corresponding target fault triggering condition above includes that the sampling data related to the target fault does not meet the corresponding threshold information .

It should be noted that, in the actual operation of the wind turbine, the sampling data of the same fault may come from multiple sources. For example, the source of the speed data of the wind power generating set includes: an encoder installed on the shaft of the motor, a pulse counter installed on the turntable, or a converter controller, etc.

In this case, it can be determined whether the source of the sampled data is correct according to the value of the sampled data. If there are more than two sampling data from correct sources, the sampling data from the source with a higher priority among the two or more sources is selected as the sampling data related to the corresponding fault. Wherein, the prioritization of each source can be determined according to the experience of those skilled in the art.

As mentioned above, in order to implement the fault-tolerant operation of the wind turbines, the faults of the wind turbines can be grouped according to the target protection object, so that each group of faults includes multiple process faults associated with the target protection object and the target of the target protection object Fault. At the same time, in the embodiment of the present invention, the condition for fault-tolerant operation of the wind power generation unit is: any one of the multiple process faults in the same group as the target fault reaches the corresponding process fault trigger condition, and the target fault does not reach the corresponding target fault trigger condition. condition.

Since process faults can be used to represent the operation of subsystems, and target faults can be used to represent the operation of the overall system. Therefore, compared with the implementation of fault-tolerant operation of wind turbines by expanding the protection boundary in the prior art, the embodiment of the present invention can incorporate the impact of the failure of each subsystem on the overall system into the fault-tolerant strategy, thereby improving the fault protection of wind turbines. reliability of the mechanism.

Among them, during the fault-tolerant operation of the wind turbine, one or more process failures may occur, but they are only warned to continue running without stopping, and the wind turbine is not protected until the target fault is triggered. This fault-tolerant method can also be understood as a passive fault-tolerant method.

Because the passive fault-tolerant method takes the protection domain degree of the target protection object as the control target, and does not make any control means for the cause of the fault, affected by the process fault, the target protection object will soon exceed the protection domain degree and trigger Corresponding target failure.

Therefore, in order to suppress the development trend of the above-mentioned process faults and prolong or avoid the eventual triggering of target faults, the embodiments of the present invention also provide an active fault tolerance mode.

FIG. 2 is a schematic flowchart of a fault tolerance method provided by a second embodiment of the present invention. The difference between FIG. 2 and FIG. 1 is that the steps in FIG. 2 further include step 103, which is used to describe the active fault tolerance mode in detail.

In step 103, the operating parameters of the wind power generating set are adjusted, and the state of the wind power generating set is restored to a state where no process fault is triggered.

To facilitate the understanding of those skilled in the art, the specific implementation method of step 103 will be described in detail below by taking the target protection object as IGBT temperature and a process fault associated with IGBT temperature as converter water cooling temperature exceeding a preset threshold as an example.

Assuming that the water cooling liquid temperature fault of the converter has been triggered and the IGBT temperature has not reached the fault value, a warning can be issued for the high water cooling liquid temperature fault, and then the IGBT temperature is used as the control target to perform fault-tolerant operation on the wind turbine.

At the same time, in order to suppress the continuous rise of the temperature of the water cooling liquid, the output power of the wind turbine can be reduced, or the number of windings involved in the operation of the converter can be reduced to restore the water cooling temperature of the converter to below the preset threshold, so that The operation of the wind turbine returned to normal.

In an optional embodiment, if the target fault reaches the corresponding target fault triggering condition, the wind power generating set is controlled to perform a shutdown operation.

Since the fault-tolerant operation mechanism is adopted, the wind turbine may be diagnosed as a fault after multiple fault-tolerant warnings, so the reason for the wind turbine to enter the fault state from the normal operation state is not necessarily the fault indicated by the final fault state.

In order to accurately locate the reason why the wind turbine enters the fault state from the normal operation state, the process fault with the highest correlation degree can be selected from the triggered process faults in the same group as the target fault, as the real fault that causes the wind turbine to shut down, so as to provide Follow-up troubleshooting and solutions provide a reference.

FIG. 3 is a schematic flowchart of a fault tolerance method provided by a third embodiment of the present invention, which is used to illustrate the above fault tolerance method in combination with an application environment. The fault tolerance method shown in FIG. 3 includes step 301 to step 307 .

It is assumed that corresponding sensors are provided for each final control object (ie, target protection object) and process controlled object to monitor the operation conditions of the final control object and process controlled object in real time.

In step 301, it is judged whether the measurement data of the process controlled object is abnormal, if the measurement data of the process controlled object is abnormal, execute step 302, otherwise return to execute step 301.

In step 302, it is judged whether the measurement data of the final controlled object still has domain degree; if the measurement data of the final controlled object still has domain degree, then step 303 is performed; otherwise, step 306 is performed.

In step 303, perform passive fault-tolerant operation on the wind power generating set and send warning information. Wherein, the warning information includes that a process fault is triggered.

In step 304, it is judged whether it is necessary to perform active fault-tolerant operation on the wind generating set; if it is necessary to perform active fault-tolerant operation on the wind generating set, then perform step 305, otherwise return to step 303;

In step 305, power limiting or single-winding operation is performed on the wind power generating set.

In step 306, a fault shutdown is performed on the wind power generating set;

In step 307, combined with the alarm information in step 303, real fault identification is performed on the wind power generating set.

As mentioned above, the embodiment of the present invention takes the system-level protection domain as a reference, and can minimize the impact of process failures, thereby significantly reducing the frequency of wind turbine failures and improving the reliability and power generation of wind turbines. quantity.

FIG. 4 is a schematic structural diagram of a fault tolerance device provided by a fourth embodiment of the present invention. As shown in FIG. 4 , the fault tolerance device includes a grouping module 401 and a fault tolerance module 402 .

Wherein, the grouping module 401 is used for grouping the faults of the wind power generating sets according to the target protection object, and each group of faults includes a plurality of process faults associated with the target protection object and target faults of the target protection object.

The fault-tolerant module 402 is used for performing fault-tolerant operation on the wind power generating set if any one of the multiple process faults in the same group as the target fault reaches the corresponding process fault trigger condition, and the target fault does not meet the corresponding target fault trigger condition.

FIG. 5 is a schematic structural diagram of a fault tolerance device provided by a fifth embodiment of the present invention. The difference between Fig. 5 and Fig. 4 is that the fault-tolerant device in Fig. 5 further includes an adjustment module 403, configured to adjust the operating parameters of the wind power generating set, and restore the state of the wind power generating set to a state where no process fault is triggered.

In an optional embodiment, the above-mentioned fault tolerance device may be an independent device with a logic operation function. From the aspect of avoiding modification of the existing hardware structure, the above-mentioned fault tolerance device can also be set in the main controller or the converter controller of the wind power generating set.

An embodiment of the present invention also provides a fault-tolerant device, including a memory, a processor, and a program stored in the memory and operable on the processor. When the processor executes the program, the above fault-tolerant method is implemented.

An embodiment of the present invention also provides a computer-readable storage medium, on which a program is stored, and when the program is executed by a processor, the fault tolerance method as described above is implemented.

It should be clear that each embodiment in this specification is described in a progressive manner, and the same or similar parts of each embodiment can be referred to each other, and each embodiment focuses on the differences from other embodiments. place. For the device embodiment, for the related parts, refer to the description part of the method embodiment. Embodiments of the present invention are not limited to the specific steps and structures described above and shown in the figures. Those skilled in the art may make various changes, modifications and additions, or change the sequence of steps after understanding the spirit of the embodiments of the present invention. Also, for the sake of brevity, detailed descriptions of known methods and techniques are omitted here.

The functional blocks shown in the structural block diagrams described above may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an application specific integrated circuit (ASIC), suitable firmware, a plug-in, a function card, or the like. When implemented in software, the elements of the embodiments of the invention are the programs or code segments employed to perform the required tasks. Programs or code segments can be stored in machine-readable media, or transmitted over transmission media or communication links by data signals carried in carrier waves. "Machine-readable medium" may include any medium that can store or transmit information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, and the like. Code segments may be downloaded via a computer network such as the Internet, an Intranet, or the like.

The embodiments of the present invention can be implemented in other specific forms without departing from its spirit and essential characteristics. For example, the algorithms described in certain embodiments may be modified without departing from the basic spirit of the embodiments of the invention without system architecture. Therefore, the current embodiments are to be considered in all respects as illustrative rather than restrictive, and the scope of the embodiments of the present invention is defined by the appended claims rather than the above description, and falls within the meaning and equivalents of the claims All changes within the range of objects are therefore included in the scope of the embodiments of the present invention.

Claims (12)

1. a kind of failure tolerant method characterized by comprising

The failure of wind power generating set is grouped according to scheduled protection of goal object, every group of failure includes and the target The target faults of protected object associated multiple procedure faults and the protection of goal object；

If reaching corresponding procedure fault trigger condition with any one in multiple procedure faults of group with the target faults, And the target faults are not up to corresponding target faults trigger condition, then execute fault-tolerant operation to the wind power generating set.

2. the method according to claim 1, wherein executing fault-tolerant operation to the wind power generating set described Later, the method also includes:

The operating parameter of the wind power generating set is adjusted, is not trigger the mistake to restore the state of the wind power generating set The state of journey failure.

3. according to the method described in claim 2, it is characterized in that, the protection of goal object includes the IGBT temperature of current transformer It is more than preset threshold that degree, which is current transformer water cooling temperature with the associated procedure fault of the IGBT temperature,；

The operating parameter of the adjustment wind power generating set, it is described not trigger to restore the state of the wind power generating set The state of procedure fault, comprising:

The output power of the wind power generating set is reduced, or reduces the number for participating in the winding of the current transformer operation, with Restore the water cooling temperature of the current transformer down to below the preset threshold.

4. the method according to claim 1, wherein executing fault-tolerant operation to the wind power generating set described Later, the method also includes:

Warning message is sent, the warning message includes having triggered the procedure fault.

5. the method according to claim 1, wherein executing fault-tolerant operation to the wind power generating set described Later, the method also includes:

If the target faults reach corresponding target faults trigger condition, controls the wind power generating set and execute shutdown behaviour Make, and choose the highest procedure fault of the degree of association from the procedure fault that has triggered of the target faults with group, as leading The true fault for causing the wind power generating set to shut down.

6. the method according to claim 1, wherein

It is described reach corresponding procedure fault trigger condition include sampled data relevant to the procedure fault meet it is corresponding Threshold information；

The not up to corresponding target faults trigger condition includes that sampled data relevant to the target faults is unsatisfactory for pair The threshold information answered.

7. according to the method described in claim 6, it is characterized in that, the method also includes:

If the source of the sampled data of same failure be it is multiple, the sampled data is determined according to the numerical value of the sampled data Source it is whether correct；

The correct sampled data in more than two sources if it exists then chooses the hits in the wherein source with higher priority According to as sampled data relevant to corresponding failure.

8. a kind of failure tolerant device characterized by comprising

Grouping module is grouped according to failure of the protection of goal object to wind power generating set, every group of failure include with it is described The target faults of protection of goal object associated multiple procedure faults and the protection of goal object；

Fault-tolerant module, if for reaching corresponding process with any one in multiple procedure faults of group with the target faults Fault triggering condition, and the target faults are not up to corresponding target faults trigger condition, then to the wind power generating set Execute fault-tolerant operation.

9. device according to claim 8, which is characterized in that described device further includes adjustment module, described for adjusting The operating parameter of wind power generating set is not trigger the shape of the procedure fault to restore the state of the wind power generating set State.

10. device according to claim 8 or claim 9, which is characterized in that the master control of wind power generating set is arranged in described device In device or current-variable controller processed.

11. a kind of failure tolerant device, can run on a memory and on a processor including memory, processor and storage Program, which is characterized in that the processor realizes that the failure as described in claim 1-7 any one is held when executing described program Wrong method.

12. a kind of computer readable storage medium, is stored thereon with program, which is characterized in that described program is executed by processor Failure tolerant method of the Shi Shixian as described in claim 1-7 any one.