CN109995281B - Control method and device for fault recovery of wind turbine generator and readable storage medium - Google Patents
Control method and device for fault recovery of wind turbine generator and readable storage medium Download PDFInfo
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- CN109995281B CN109995281B CN201711486194.0A CN201711486194A CN109995281B CN 109995281 B CN109995281 B CN 109995281B CN 201711486194 A CN201711486194 A CN 201711486194A CN 109995281 B CN109995281 B CN 109995281B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/10—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
- H02P9/105—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load for increasing the stability
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/15—Special adaptation of control arrangements for generators for wind-driven turbines
Abstract
The invention discloses a control method for fault recovery of a wind turbine generator, which comprises the following steps of checking a signal of a fault recovery command after the wind turbine generator fails; after the fault recovery command is received, increasing a given torque value according to a preset torque change rate until the relevant parameters of the unit are recovered to a preset range; wherein the relevant parameters are active power, torque and rotational speed. According to the scheme provided by the invention, the rotation speed is inhibited from rising by increasing the torque when the wind turbine generator fails, so that the false recovery phenomenon can be avoided, the active power, the rotation speed and the torque are raised in a matching manner, and finally, all parameters are stably and quickly recovered to a normal state. The invention also discloses a control device for the fault recovery of the wind turbine generator and a computer readable storage medium, which also have the beneficial effects and are not repeated herein.
Description
Technical Field
The invention relates to the field of wind power generation, in particular to a control method and equipment for fault recovery of a wind turbine generator and a readable storage medium.
Background
The wind generating set comprises a wind wheel and a generator; the wind wheel comprises blades, a hub, a reinforcing member and the like; it has the functions of wind driven blade rotation to generate electricity, generator head rotation, etc. The wind power generation power supply comprises a wind generating set, a tower frame for supporting the generating set, a storage battery charging controller, an inverter, an unloader, a grid-connected controller, a storage battery pack and the like. When the wind generating set generates electricity, the output electric frequency is ensured to be constant. The wind power generation system is very necessary for wind power grid-connected power generation and wind-solar hybrid power generation. To ensure the constant frequency of wind power, one way is to ensure the constant rotating speed of the generator, i.e. the constant speed and constant frequency operation way, because the generator is driven by the wind turbine through the transmission device to operate, the rotating speed of the wind turbine needs to be undoubtedly constant, and the way can influence the conversion efficiency of wind energy; the other mode is that the rotating speed of the generator changes along with the wind speed, and the constant frequency of the output electric energy is ensured by other means, namely, the variable-speed constant-frequency operation is realized.
When the wind generating set breaks down, in order to guarantee normal operation, need to recover to normal condition within a certain time. In the prior art, a control method for rapidly recovering active power to a level before a fault is usually adopted, but the active power recovered by the control method cannot always keep a normal state, and the phenomenon that the active power rapidly recovers to the level before the fault and then drops greatly and then slowly recovers to the level before the fault occurs, so that the 'false recovery' phenomenon causes the whole recovery time to be longer and is easy to cause unstable operation of a unit.
Therefore, how to reduce the fluctuation of the active power recovery of the wind turbine generator system after the grid fault is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a control method, equipment and a readable storage medium for wind turbine generator system fault recovery, which are used for reducing the fluctuation of active power recovery of a wind turbine generator system after a power grid fault.
In order to solve the technical problem, the invention provides a control method for fault recovery of a wind turbine generator, which comprises the following steps:
after the wind turbine generator fails, checking a signal of a failure recovery command;
after the fault recovery command is received, increasing a given torque value according to a preset torque change rate until the relevant parameters of the unit are recovered to a preset range;
wherein the relevant parameters are active power, torque and rotational speed.
Optionally, the preset torque change rate is specifically a torque change rate corresponding to a range of a preset voltage drop value;
correspondingly, the increasing the given torque value according to the preset torque change rate specifically comprises:
checking the voltage drop value at regular time;
increasing the given torque value according to a preset torque change rate corresponding to the range according to the range of the voltage drop value;
the voltage drop value is the ratio of the rated voltage minus the actual voltage of the unit to the rated voltage.
Optionally, the increasing the given torque value according to the preset torque change rate corresponding to the range specifically includes:
increasing the torque setpoint by a first torque rate of change when the voltage droop value is greater than or equal to a first threshold value;
increasing the active power at a first power rate of change when the voltage droop value is less than the first threshold and greater than or equal to a second threshold;
and when the voltage drop value is smaller than the second threshold value, adjusting a control strategy according to the state of the unit fault recovery until the relevant parameters of the unit are recovered to be within the preset range of the normal value.
Optionally, the adjusting the control strategy according to the state of the unit fault recovery until the unit related parameter is recovered to the preset range of the normal value specifically includes:
judging whether the actual rotating speed of the current wind wheel is greater than the normal rotating speed or not;
if yes, constant power control is carried out for preset time;
and if not, increasing the active power according to a second power change rate until the relevant parameters of the unit are restored to be within the preset range of the normal value.
Optionally, the adjusting the control strategy according to the state of the unit fault recovery until the unit related parameter is recovered to the preset range of the normal value specifically includes:
judging whether the variable pitch angle is zero or not;
if yes, increasing the active power according to the second power change rate until the relevant parameters of the unit are restored to be within the preset range of the normal value;
and if not, performing the constant power control for the preset time.
Optionally, increasing the active power specifically is increasing the active power by setting the torque setpoint according to the following formula:
wherein T is the torque set point, P0Specifically, the actual value of the active power fed back by the frequency converter, Δ x is the required active power change rate, r is the rated rotating speed corresponding to the rated torque, r' is the current rotating speed of the wind wheel, and n is a constant.
In order to solve the above technical problem, the present invention further provides a control device for recovering a failure of a wind turbine, including:
a memory for storing instructions, wherein the instructions comprise the steps of the control method for wind turbine generator fault recovery according to any one of the above items;
a processor to execute the instructions in the memory.
In order to solve the technical problem, the present invention further provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the control method for wind turbine generator fault recovery according to any one of the above.
The control method for the fault recovery of the wind turbine generator comprises the following steps of checking a signal of a fault recovery command after the wind turbine generator fails; after the fault recovery command is received, increasing a given torque value according to a preset torque change rate until the relevant parameters of the unit are recovered to a preset range; wherein the relevant parameters are active power, torque and rotational speed. At the moment when the wind turbine generator fails, the rotating speed of the wind wheel can be continuously increased, but the torque is not adaptively increased while the rotating speed is increased. The active power of the wind turbine generator is in direct proportional relation with the rotating speed and the torque of the wind wheel respectively, the rotating speed of the wind wheel is influenced by the torque, when the rotating speed is increased and the torque is not increased, the conditions that the active power is recovered to a normal value, the rotating speed and the torque are not matched and are still changed occur, the rotating speed of the wind wheel is reduced, and the false recovery phenomenon that the active power seems to be recovered to the normal value but cannot be kept to the normal value is caused. Therefore, when fault recovery is carried out, the torque set value is increased according to the preset torque change rate, the active power can be guaranteed to be improved, meanwhile, the rotating speed is restrained from rising, the active power, the rotating speed and the torque rise in a matching mode, the phenomenon of 'false recovery' is avoided, and finally, all parameters are stably and quickly recovered to a normal state. The control equipment for wind turbine generator fault recovery and the computer readable storage medium provided by the invention also have the beneficial effects, and are not described again here.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a flowchart of a control method for recovering a failure of a wind turbine generator according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a specific implementation manner of step S11 according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a specific implementation manner of step S21 according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a specific implementation manner of step S32 according to an embodiment of the present invention;
fig. 5 is a flowchart of another specific implementation of step S32 according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a control device for recovering a failure of a wind turbine generator according to an embodiment of the present invention.
Detailed Description
The core of the invention is to provide a control method, equipment and a readable storage medium for wind turbine generator system fault recovery, which are used for reducing the fluctuation of active power recovery of the wind turbine generator system after a power grid fault.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a flowchart of a control method for recovering from a failure of a wind turbine generator according to an embodiment of the present invention. As shown in fig. 1, the control method for recovering from the failure of the wind turbine generator includes:
s10: and after the wind turbine generator fails, checking a signal of a failure recovery command.
S11: and after a fault recovery command is received, increasing a set torque value according to a preset torque change rate until the relevant parameters of the unit are recovered to be within a preset range.
The relevant parameters are active power, torque and rotational speed.
In a specific implementation, for step S10, after the wind turbine fault is found and repaired, the wind turbine needs to be restarted. Therefore, after the wind turbine generator fails, a signal of a failure recovery command needs to be waited for, so as to start a subsequent failure recovery step after receiving the signal.
For step S11, when the master control receives the failure recovery command, the master control increases the torque set value according to the preset torque change rate. The torque set value is specifically sent to the frequency converter by the main control room, and the frequency converter controls the torque to be lifted. When the given torque value is increased, the wind wheel rotating speed or the generator rotor rotating speed can be referred to (the wind wheel rotating speed or the generator rotor rotating speed can be converted and calculated), namely, an optimal curve between preset torque rotating speeds is referred to, and specifically, the model H93 is taken as an example, and the optimal curve can be controlled by the following program:
“IF actual_rotor_speed<＝9.7 THEN output_torque：＝0.0；END_IF；
IF(actual_rotor_speed>9.7)AND(actual_rotor_speed<＝11.0)THEN output_torque：＝(actual_rotor_speed-9.7)×21.53；END_IF；
IF(actual_rotor_speed>11.0)AND(actual_rotor_speed<＝12.2)THEN output_torque：＝(actual_rotor_speed-11.0)×7.27+27.99；END_IF；
IF(actual_rotor_speed>12.2)AND(actual_rotor_speed<＝13.8)THEN output_torque：＝(actual_rotor_speed-12.2)×6.88+36.71；END_IF；
IF(actual_rotor_speed>13.8)AND(actual_rotor_speed<＝14.63)THEN output_torque：＝(actual_rotor_speed-13.8)×52.28+47.72；END_IF；
IF(actual_rotor_speed>14.63)AND(actual_rotor_speed<＝15.26)THEN output_torque：＝(actual_rotor_speed-14.63)×10.46+91.11；END_IF；
IF constant_power_mode AND(actual_rotor_speed>15.26)THEN output_torque：＝(15.26×100.0)/actual_rotor_speed×97.8/100；END_IF；”
through increasing the torque set value, the increase of the rotating speed of the wind wheel is inhibited, so that the torque and the rotating speed are adaptively increased until all parameters of the wind turbine generator set are as follows: and restoring the active power, the torque and the rotating speed to the normal values preset by the unit.
The control method for the fault recovery of the wind turbine generator, provided by the embodiment of the invention, comprises the steps of checking a signal of a fault recovery command after the wind turbine generator fails; after the fault recovery command is received, increasing a given torque value according to a preset torque change rate until the relevant parameters of the unit are recovered to a preset range; wherein the relevant parameters are active power, torque and rotational speed. At the moment when the wind turbine generator fails, the rotating speed of the wind wheel can be continuously increased, but the torque is not adaptively increased while the rotating speed is increased. The active power of the wind turbine generator is in direct proportional relation with the rotating speed and the torque of the wind wheel respectively, the rotating speed of the wind wheel is influenced by the torque, when the rotating speed is increased and the torque is not increased, the conditions that the active power is recovered to a normal value, the rotating speed and the torque are not matched and are still changed occur, the rotating speed of the wind wheel is reduced, and the false recovery phenomenon that the active power seems to be recovered to the normal value but cannot be kept to the normal value is caused. Therefore, when fault recovery is carried out, the torque set value is increased according to the preset torque change rate, the active power can be guaranteed to be improved, meanwhile, the rotating speed is restrained from rising, the active power, the rotating speed and the torque rise in a matching mode, the phenomenon of 'false recovery' is avoided, and finally, all parameters are stably and quickly recovered to a normal state.
Fig. 2 is a flowchart illustrating a specific implementation manner of step S11 according to an embodiment of the present invention. As shown in fig. 2, on the basis of the foregoing embodiment, in another embodiment, when the preset torque change rate is specifically a torque change rate corresponding to a range of the preset voltage drop value, the step S11 specifically includes:
s20: and checking the voltage drop value at regular time.
S21: and increasing the given torque value according to the torque change rate corresponding to the preset range according to the range of the voltage drop value.
The voltage drop value is the ratio of the rated voltage minus the actual voltage of the unit to the rated voltage.
In order to restore a faulty wind turbine to a normal state as soon as possible, increasing the torque setpoint too quickly may cause large losses to the turbine, especially to the turbine drive train, which is subjected to large impact loads.
Therefore, the corresponding recovery strategy can be set in advance according to the actual condition of the wind turbine generator fault. Because the voltage of the wind turbine generator can be measured, the faults of the wind turbine generator can be classified according to the voltage drop value of the wind turbine generator. The voltage drop value can be calculated by the following formula:
wherein a is a voltage drop value, U0And U' is the current actual voltage of the unit.
The voltage drop values can be sequenced from large to small for segmentation, the ranges of each voltage drop value are not overlapped, and each range corresponds to the change rate of a given torque value. Generally, the larger the voltage drop value is, the smaller the corresponding torque change rate is, so as to reduce the loss of the unit.
For step S20, step S10 is undertaken, and upon receiving the fault recovery command, the voltage droop value is checked in real time or at regular time.
For step S21, according to the range in which the voltage drop value of the current unit is located, the torque set value is increased according to the torque change rate corresponding to the preset range. And changing the torque change rate when the voltage sag value decreases to another preset range.
In the control method for wind turbine generator fault recovery provided by the embodiment of the present invention, the preset torque change rate is specifically a torque change rate corresponding to a preset voltage drop value range, and step S11 specifically includes checking the voltage drop value at regular time and increasing a torque set value according to the torque change rate corresponding to the preset range according to the range in which the voltage drop value is located. The voltage drop value is used for dividing the category of the unit fault, the whole fault recovery process is controlled in a segmented mode, and loss of the unit can be reduced while the unit is rapidly recovered to a normal operation state.
Fig. 3 is a flowchart illustrating a specific implementation manner of step S21 according to an embodiment of the present invention. As shown in fig. 3, on the basis of the foregoing embodiment, in another embodiment, the step S21 specifically includes:
s30: when the voltage drop value is greater than or equal to the first threshold value, the torque set point is increased at a first torque change rate.
S31: and when the voltage drop value is smaller than the first threshold value and larger than or equal to the second threshold value, increasing the active power according to the first power change rate.
S32: and when the voltage drop value is smaller than a second threshold value, adjusting the control strategy according to the state of the unit fault recovery until the relevant parameters of the unit are recovered to be within the preset range of the normal value.
According to the embodiment of the invention, the failure recovery of the wind turbine generator is set to three sections, and each section corresponds to different control strategies. Wherein the first threshold is greater than the second threshold and the first rate of torque change is less than the second rate of torque change. The first threshold value, the second threshold value, the first torque change rate and the second torque change rate can be set by referring to the actual condition of the wind turbine generator and debugging or simulation experiments so as to ensure that the wind turbine generator is quickly recovered to a normal state and the loss of the wind turbine generator is small.
For step S30, the torque setpoint is increased at a first torque rate of change when the voltage droop value is greater than or equal to the first threshold value. At the moment, the unit has serious faults and needs to be slowly recovered, so that the unit transmission chain is prevented from being lost. Specifically, the rotation speed rise can be suppressed by increasing the torque set value in the rotation speed rise stage according to the actual torque feedback value at a torque change rate of 50%/s until the torque set value rises to 0.8 of the normal value.
For step S31, the active power recovery needs to be accelerated, so the active power recovery can be performed in units of the active power change rate, specifically, the torque set value can be set to increase according to the following formula:
wherein T is the torque set point, P0Specifically, the actual value of the active power fed back by the frequency converter, Δ x is a required active power change rate, r is a rated rotating speed corresponding to a rated torque in a preset torque rotating speed curve, r' is the current rotating speed of the wind wheel, and n is a constant.
For step S32, when the voltage drop value is smaller than the second threshold, the control strategy is adjusted according to the state of unit fault recovery until the unit related parameters are recovered within the preset range of the normal values. Referring to fig. 4 and 5, the method can be implemented as follows:
fig. 4 is a flowchart illustrating a specific implementation manner of step S32 according to an embodiment of the present invention. As shown in fig. 4, step S32 specifically includes:
s40: judging whether the actual rotating speed of the current wind wheel is greater than the normal rotating speed or not; if so, go to step S41; if not, the flow proceeds to step S42.
S41: and performing constant power control for preset time.
S42: and increasing the active power according to the second power change rate until the relevant parameters of the unit are restored to be within the preset range of the normal value.
Fig. 5 is a flowchart illustrating another specific implementation manner of step S32 according to an embodiment of the present invention. As shown in fig. 5, step S32 specifically includes:
s50: judging whether the variable pitch angle is zero or not; if so, go to step S51; if not, the flow proceeds to step S52.
S51: and increasing the active power according to the second power change rate until the relevant parameters of the unit are restored to be within the preset range of the normal value.
S52: and performing constant power control for preset time.
And judging whether the actual rotating speed of the current wind wheel is greater than the normal rotating speed or judging whether the variable pitch angle is zero, wherein the purpose is to judge whether the unit has enough kinetic energy to recover the power. For the latter, the amount of wind energy absorbed by the blade is minimal when the pitch angle is zero. Therefore, when the actual rotating speed of the current wind wheel is larger than the normal rotating speed or the pitch angle is not zero, the fact that enough kinetic energy still exists in the unit represents, and at the moment, constant power control of about 15s can be started. After the power rising stage, the torque and the rotating speed are basically matched, the power and the torque tend to be stable, and the rotating speed cannot rise rapidly, so that constant power control can be adopted.
If the actual rotating speed of the current wind wheel is smaller than the normal rotating speed or the variable pitch angle is zero, active power is required to be added according to a preset second power change rate to enable the active power to approach to a preset optimal curve of torque rotating speed so as to prevent the rotating speed from decreasing. At the moment, each parameter of the unit is close to a normal value, and the second power change rate is smaller than the first power change rate, so that the aim of fine adjustment is fulfilled.
According to the control method for the fault recovery of the wind turbine generator, provided by the embodiment of the invention, the fault recovery of the wind turbine generator is divided into three sections for control according to the range of the voltage drop value, so that the loss of the wind turbine generator is reduced and the service life of the wind turbine generator is prolonged while the wind turbine generator is rapidly recovered to a normal level.
Fig. 6 is a schematic structural diagram of a control device for recovering a failure of a wind turbine generator according to an embodiment of the present invention. As shown in FIG. 6, the control device may vary significantly depending on configuration or performance, and may include one or more processors (CPUs) 610 (e.g., one or more processors) and memory 620, one or more storage media 630 (e.g., one or more mass storage devices) storing applications 633 or data 632. Memory 620 and storage medium 630 may be, among other things, transient or persistent storage. The program stored on the storage medium 630 may include one or more modules (not shown), each of which may include a sequence of instructions operating on a computing device. Still further, the processor 610 may be configured to communicate with the storage medium 630 to execute a series of instruction operations in the storage medium 630 on the control apparatus 600 for wind turbine generator system fault recovery.
The wind turbine fault recovery control apparatus 600 may also include one or more power supplies 640, one or more wired or wireless network interfaces 650, one or more input/output interfaces 660, and/or one or more operating systems 631, such as Windows Server, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, and the like.
The steps in the control method for wind turbine generator fault recovery described in fig. 1 to 5 above are implemented by the control device for wind turbine generator fault recovery based on the structure shown in fig. 6.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the control device for wind turbine generator fault recovery and the computer-readable storage medium described above may refer to corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present application, it should be understood that the disclosed method, apparatus, and computer-readable storage medium may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, a division of modules is merely a division of logical functions, and an actual implementation may have another division, for example, a plurality of modules or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form. Modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In addition, functional modules in the embodiments of the present application may be integrated into one processing module, or each of the modules may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.
The integrated module, if implemented in the form of a software functional module and sold or used as a separate product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a function calling device, or a network device) to execute all or part of the steps of the method of the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The method, the device and the computer readable storage medium for controlling the fault recovery of the wind turbine generator provided by the invention are described in detail above. The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (4)
1. A control method for fault recovery of a wind turbine generator is characterized by comprising the following steps:
after the wind turbine generator fails, checking a signal of a failure recovery command;
after the fault recovery command is received, controlling the fault recovery command in the following mode until the relevant parameters of the unit are recovered to a preset range, wherein the relevant parameters of the unit specifically include active power, torque and rotating speed;
increasing the torque setpoint at a first torque rate of change when the voltage droop value is greater than or equal to a first threshold value;
increasing the active power at a first power rate of change when the voltage droop value is less than the first threshold and greater than or equal to a second threshold;
when the voltage drop value is smaller than the second threshold value, judging whether the actual rotating speed of the current wind wheel is larger than the normal rotating speed or not, if so, performing constant power control for preset time, and if not, increasing the active power according to a second power change rate until the relevant parameters of the unit are restored to the preset range of the normal value; or, when the voltage drop value is smaller than the second threshold value, judging whether a variable pitch angle is zero, if so, increasing the active power according to the second power change rate until the relevant parameters of the unit are restored to be within a preset range of the normal value, and if not, performing the constant power control for the preset time.
2. Control method according to any of claim 1, characterized in that increasing the active power is embodied by setting the torque setpoint to increase the active power according to the following formula:
wherein T is the torque set value, P0Specifically, the actual value of the active power fed back by the frequency converter, Δ x is the required active power change rate, r is the rated rotating speed corresponding to the rated torque, r' is the current rotating speed of the wind wheel, and n is a constant.
3. The utility model provides a wind turbine generator system fault recovery's controlgear which characterized in that includes:
a memory for storing instructions comprising the steps of the control method for wind turbine generator fault recovery according to claim 1 or 2;
a processor to execute the instructions in the memory.
4. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the control method for wind turbine generator system fault recovery according to claim 1 or 2.
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| CN104242346A (en) * | 2014-09-19 | 2014-12-24 | 许继集团有限公司 | Low voltage ride-through control method of wind generation set |
| CN105939121A (en) * | 2015-11-23 | 2016-09-14 | 中国矿业大学 | Wind generator current-adjustment and phase-modulation control-based parallel DCM Boost PFC converter |
| EP3073635A1 (en) * | 2015-03-25 | 2016-09-28 | ALSTOM Renewable Technologies | Protecting a permanent magnet generator |
| CN205898976U (en) * | 2016-07-25 | 2017-01-18 | 国网江西省电力科学研究院 | Low voltage test system of simulation motor load characteristic based on converter |
| CN106374526A (en) * | 2016-09-14 | 2017-02-01 | 燕山大学 | Hydraulic wind power generation set and energy layered-controlled low-voltage ride through control method |
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2017
- 2017-12-30 CN CN201711486194.0A patent/CN109995281B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242346A (en) * | 2014-09-19 | 2014-12-24 | 许继集团有限公司 | Low voltage ride-through control method of wind generation set |
| EP3073635A1 (en) * | 2015-03-25 | 2016-09-28 | ALSTOM Renewable Technologies | Protecting a permanent magnet generator |
| CN105939121A (en) * | 2015-11-23 | 2016-09-14 | 中国矿业大学 | Wind generator current-adjustment and phase-modulation control-based parallel DCM Boost PFC converter |
| CN205898976U (en) * | 2016-07-25 | 2017-01-18 | 国网江西省电力科学研究院 | Low voltage test system of simulation motor load characteristic based on converter |
| CN106374526A (en) * | 2016-09-14 | 2017-02-01 | 燕山大学 | Hydraulic wind power generation set and energy layered-controlled low-voltage ride through control method |
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