CN109751184B - Control method, main controller and variable flow controller for wind generating set - Google Patents
Control method, main controller and variable flow controller for wind generating set Download PDFInfo
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- CN109751184B CN109751184B CN201711057953.1A CN201711057953A CN109751184B CN 109751184 B CN109751184 B CN 109751184B CN 201711057953 A CN201711057953 A CN 201711057953A CN 109751184 B CN109751184 B CN 109751184B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
Abstract
The embodiment of the invention discloses a control method for a wind generating set, a main controller and a variable flow controller. The main controller is connected with the variable flow controller in a communication mode. The method comprises the following steps: when the main controller determines that the wind generating set reaches a preset shutdown condition, generating and sending a first instruction for controlling a converter network side of the wind generating set to stop working to a converter controller; and the converter controller receives the first instruction and controls the converter network side to stop working according to the first instruction. According to the control method, the main controller and the converter controller for the wind generating set, the converter network side is not always in the working state, so that the electric quantity consumption can be saved.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a control method, a main controller and a variable flow controller for a wind generating set.
Background
The wind generating set state mainly includes: a shutdown state, a standby state, a startup state and a power generation operation state. The wind generating set can be in a generating operation state to carry out grid-connected generation only under the condition that the wind power is relatively sufficient.
However, in the whole operation period of the wind generating set, a quite long time is provided, and the wind power is insufficient. The wind generating set is in a stop state or a standby state. When the wind generating set is in a shutdown state or a standby state, the wind generating set cannot generate electric energy, and some subsystems of the wind generating set can consume electric quantity. Such as variable flow controllers and cooling systems. The power consumption of the converter controller is mainly reflected in that the converter network side is always in a working state.
Disclosure of Invention
The embodiment of the invention provides a control method, a main controller and a variable flow controller for a wind generating set, which can save electric quantity consumption.
In one aspect, an embodiment of the present invention provides a control method for a wind turbine generator system, where the wind turbine generator system includes a main controller and a converter controller communicatively connected to the main controller, and the method includes:
when the main controller determines that the wind generating set reaches a preset shutdown condition, generating and sending a first instruction for controlling a converter network side of the wind generating set to stop working to a converter controller;
and the converter controller receives the first instruction and controls the converter network side to stop working according to the first instruction.
In one embodiment of the invention, the method further comprises:
the current transformation controller feeds back first information to the main controller; the first information is used for indicating that the grid side of the converter stops working;
the main controller receives the first information, generates and sends a second instruction for controlling a cooling system of the converter to stop working to the converter controller;
and the variable flow controller receives the second instruction and controls the cooling system to stop working according to the second instruction.
In one embodiment of the invention, the method further comprises:
when the main controller determines that the wind generating set reaches a preset starting condition, generating and sending a third instruction for controlling the grid side of the converter to start to work to the converter controller;
and the converter controller receives the third instruction and controls the converter network side to work according to the third instruction.
In one embodiment of the invention, the method further comprises:
the current transformation controller feeds back second information to the main controller; the second information is used for indicating that the network side of the converter works;
the main controller receives the second information, generates and sends a fourth instruction for controlling the cooling system to start to work to the variable flow controller;
and the variable flow controller receives a fourth instruction and controls the cooling system to work according to the fourth instruction.
In one embodiment of the invention, the main controller determines that the wind turbine generator set reaches the preset shutdown condition and the preset startup condition is determined according to the wind speed or the rotating speed of the generator of the wind turbine generator set.
On the other hand, an embodiment of the present invention provides a main controller for a wind turbine generator system, where the main controller includes:
the determining module is used for determining whether the wind generating set reaches a preset shutdown condition;
the generating module is used for generating a first instruction for controlling the converter grid side of the wind generating set to stop working when the determining module determines that the wind generating set reaches the preset shutdown condition;
and the sending module is used for sending the first instruction to a variable flow controller of the wind generating set.
In one embodiment of the invention, the master controller further comprises:
the receiving module is used for receiving first information fed back by the variable flow controller; the first information is used for indicating that the grid side of the converter stops working;
the generating module is further used for generating a second instruction for controlling the cooling system of the converter to stop working;
and the sending module is also used for sending a second instruction to the variable flow controller.
In an embodiment of the invention, the determining module is further configured to determine whether the wind generating set reaches a preset startup condition;
the generating module is further used for generating a third instruction for controlling the converter grid side to start working when the determining module determines that the wind generating set reaches the preset starting condition;
and the sending module is also used for sending a third instruction to the variable flow controller.
In an embodiment of the present invention, the receiving module is further configured to receive second information fed back by the variable flow controller; the second information is used for indicating that the network side of the converter works;
the generating module is further used for generating a fourth instruction for controlling the starting operation of the cooling system;
and the sending module is also used for sending a fourth instruction to the variable flow controller.
In an embodiment of the present invention, the determining module is specifically configured to:
and determining whether the wind generating set reaches a preset shutdown condition or a preset startup condition according to the wind speed or the rotating speed of a generator of the wind generating set.
In another aspect, an embodiment of the present invention provides a converter controller for a wind turbine generator system, where the converter controller includes:
the receiving unit is used for receiving a first instruction which is sent by a main controller of the wind generating set and used for controlling a converter grid side of the wind generating set to stop working;
and the control unit is used for controlling the grid side of the converter to stop working according to the first instruction.
In one embodiment of the invention, the variable flow controller further comprises:
the feedback unit is used for feeding back first information for indicating that the grid side of the converter stops working to the main controller;
the receiving unit is also used for receiving a second instruction which is sent by the main controller and used for controlling the cooling system of the converter to stop working;
and the control unit is also used for controlling the cooling system to stop working according to the second instruction.
In an embodiment of the invention, the receiving unit is further configured to receive a third instruction sent by the main controller for controlling the converter grid side to start operation;
and the control unit is also used for controlling the grid side of the converter to work according to the third instruction.
In an embodiment of the present invention, the feedback unit is further configured to feed back, to the main controller, second information indicating that the grid side of the converter is operating;
the receiving unit is also used for receiving a fourth instruction which is sent by the main controller and used for controlling the cooling system to start to work;
and the control unit is also used for controlling the cooling system to work according to the fourth instruction.
According to the control method, the main controller and the converter controller for the wind generating set, which are disclosed by the embodiment of the invention, the grid side of the converter is not always in the working state, so that the electric quantity consumption can be saved, and further, the cooling system is not always in the working state, so that the electric quantity consumption can also be saved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart illustrating a control method for a wind turbine generator system according to an embodiment of the present invention;
FIG. 2 is an interaction diagram of a master controller and a converter controller provided by an embodiment of the invention;
FIG. 3 is a diagram illustrating a comparison of power consumption between a control method provided by an embodiment of the present invention and a control method of the prior art;
FIG. 4 is a schematic diagram of a main controller according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a variable current controller according to an embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
The wind generating set comprises a wind generating set body, a wind generating set body and a wind generating set body, wherein the wind generating set body is provided with a plurality of wind generating sets, and the wind generating sets are arranged on the wind generating set body. The embodiment of the invention provides a control method for a wind generating set, which is used for saving electric quantity consumption.
It should be noted that the wind turbine generator system according to the embodiment of the present invention includes a main controller and a variable flow controller, wherein the main controller is in communication connection with the variable flow controller.
Fig. 1 shows a flow chart of a control method for a wind turbine generator system according to an embodiment of the present invention. The control method for the wind generating set can comprise the following steps:
s101: and when the main controller determines that the wind generating set reaches a preset shutdown condition, generating and sending a first instruction for controlling the converter network side of the wind generating set to stop working to the converter controller.
S102: and the converter controller receives the first instruction and controls the converter network side to stop working according to the first instruction.
In an embodiment of the invention, the main controller determines that the wind generating set reaches the preset shutdown condition, and the determination can be performed according to the wind speed or the rotating speed of the generating set of the wind generating set.
For example, the main controller determines that the wind generating set reaches the preset shutdown condition according to the rotating speed of the generating set of the wind generating set.
The main controller can receive the rotating speed monitoring value of the generator of the wind generating set at intervals, and if the currently received rotating speed monitoring value is smaller than the rotating speed value of the wind generating set in a grid-connected power generation state, the wind generating set is determined to reach a preset shutdown condition.
For example, the rotating speed value of the wind generating set in the grid-connected power generation state is assumed to be 7 rpm.
And the main controller receives the rotating speed monitoring value of the generator of the wind generating set every 0.1ms (millisecond). In one embodiment of the invention, the main controller may receive a rotational speed monitoring value from a sensor for measuring the rotational speed of the generator.
And if the rotating speed monitoring value currently received by the main controller is less than 7 revolutions per minute, the main controller determines that the wind generating set reaches a preset shutdown condition. And then the main controller generates and sends a first instruction for controlling the converter grid side of the wind generating set to stop working to the converter controller.
And after receiving the first instruction, the converter controller controls the converter network side to stop working.
According to the control method for the wind generating set, the converter grid side is not always in the working state, and the electric quantity consumption can be saved.
In one embodiment of the invention, the cooling system may also be stopped after the grid side of the converter stops working, to further reduce the power consumption. The control method for the wind generating set provided by the embodiment of the invention can also comprise the following steps: the current transformation controller feeds back first information to the main controller; the first information is used for indicating that the grid side of the converter stops working; the main controller receives the first information, generates and sends a second instruction for controlling a cooling system of the converter to stop working to the converter controller; and the variable flow controller receives the second instruction and controls the cooling system to stop working according to the second instruction.
In one embodiment of the invention, the cooling system may be: a water cooled system or an air cooled system.
In an embodiment of the present invention, a process for controlling the grid-side start-up operation of the converter is further provided in the embodiment of the present invention. The control method for the wind generating set of the embodiment of the invention can further comprise the following steps: when the main controller determines that the wind generating set reaches a preset starting condition, generating and sending a third instruction for controlling the grid side of the converter to start to work to the converter controller; and the converter controller receives the third instruction and controls the converter network side to work according to the third instruction.
It should be noted that the preset startup condition of the embodiment of the present invention may include an initial startup condition and a restart condition.
In an embodiment of the invention, the main controller determines that the wind generating set reaches a preset startup condition, and the determination can be performed according to the wind speed or the rotating speed of the generating set of the wind generating set.
For example, the main controller determines that the wind generating set reaches the preset startup condition according to the rotating speed of the generating set of the wind generating set.
The main controller can receive the rotating speed monitoring value of the generator of the wind generating set at intervals, the rotating speed change trend of the generator in the previous time period of the time point corresponding to the currently received rotating speed monitoring value is determined according to the rotating speed monitoring value, and if the rotating speed monitoring value currently received by the main controller is larger than the rotating speed value corresponding to the preset starting condition and the rotating speed change trend is determined to be an increasing trend, the wind generating set is determined to reach the preset starting condition.
For example, assume that the preset startup condition corresponds to a rotation speed value of 0.5 rpm.
And the main controller receives the rotating speed monitoring value of the generator of the wind generating set every 0.1ms (millisecond). And assuming that the currently received rotating speed monitoring value is 0.6 r/min and the currently received rotating speed monitoring value at the previous 0.1ms is 0.49 r/min, the main controller determines that the rotating speed variation trend is an increasing trend. At the moment, the currently received rotation speed monitoring value of 0.6 rpm of the main controller is greater than the rotation speed value of 0.5 rpm corresponding to the preset starting condition, and the rotation speed change trend is determined to be an increasing trend. At the moment, the main controller determines that the wind generating set reaches a preset starting condition. And then the main controller generates and sends a third instruction for controlling the converter grid side of the wind generating set to start to work to the converter controller. And after receiving the third instruction, the converter controller controls the converter network side to work.
In one embodiment of the invention, the cooling system may be controlled to operate after grid side operation of the converter. The control method for the wind generating set of the embodiment of the invention can further comprise the following steps: the current transformation controller feeds back second information to the main controller; the second information is used for indicating that the network side of the converter works; the main controller receives the second information, generates and sends a fourth instruction for controlling the cooling system to start to work to the variable flow controller; and the variable flow controller receives a fourth instruction and controls the cooling system to work according to the fourth instruction.
In one embodiment of the invention, when the preset startup condition is the initial startup condition, the operation mode of the grid side of the converter is changed from the automatic startup mode of the prior art to the startup mode cooperatively controlled by the main controller and the variable current controller.
The control method for the wind turbine generator system provided by the embodiment of the invention is described in detail through specific examples.
As shown in fig. 2, fig. 2 is an interaction diagram of a master controller and a converter controller provided in the embodiment of the present invention.
Firstly, when the wind generating set is started for the first time, if the variable flow controller has no fault, the variable flow controller feeds back the rdy on state to the main controller.
And the main controller confirms that the converter has no fault according to the rdy on state and sends a start instruction to the converter controller.
And after receiving the start instruction, the variable flow controller only executes the closing action of the circuit breaker. After closing, the variable flow controller feeds back the rdy run grid state to the main controller.
And after receiving the rdy run grid state, the main controller sends a run grid instruction to the variable flow controller when monitoring that the rotating speed of the generator reaches 0.5 r/min.
And after receiving a run grid instruction, the converter controller controls the network side of the converter to enter a working state. While the rdy run status is fed back to the main controller.
And after receiving the rdy run state, the main controller sends a working instruction for controlling the starting of the cooling system to the variable flow controller.
And after receiving a working instruction for controlling the cooling system to start, the variable flow controller controls the cooling system to work.
When the rotating speed of the generator is monitored to reach 3.5 revolutions per minute, the main controller sends a run instruction to the variable flow controller.
And after receiving the run instruction, the converter side is controlled by the converter controller to enter a working state. While simultaneously feeding back rdy ref status to the master controller.
And after receiving the rdy ref state, the main controller controls the wind generating set to enter a grid-connected power generation state.
When the wind power is small and the wind power is insufficient, the wind generating set is separated from a grid-connected power generation state.
And when the main controller monitors that the rotating speed of the generator is less than 3.5 revolutions per minute, the main controller cancels the run instruction.
And after the main controller cancels the run instruction, the converter side is controlled by the converter controller to stop working and the rdy ref state feedback is cancelled.
After the variable flow controller cancels the rdy ref state feedback, when the controller monitors that the rotating speed of the generator is less than 0.5 r/min, the main controller cancels a run grid instruction.
After the main controller cancels the run grid command, the converter controller controls the converter network side to stop working and cancels the rdyrun state feedback.
And after the variable flow controller cancels the rdy run state feedback, the main controller sends a command for controlling the cooling system to stop working to the variable flow controller.
And after receiving the command for controlling the cooling system to stop working, the variable flow controller controls the cooling system to stop working. And the wind generating set enters a shutdown state.
When wind exists, the wind generating set is started again. The main controller monitors the rotational speed of the generator.
And when the rotating speed of the generator is monitored to reach 0.5 r/min, a run grid instruction is sent to the variable flow controller.
And after receiving a run grid instruction, the converter controller controls the network side of the converter to enter a working state. While the rdy run status is fed back to the main controller.
And after receiving the rdy run state, the main controller sends a working instruction for controlling the starting of the cooling system to the variable flow controller.
And after receiving a working instruction for controlling the cooling system to start, the variable flow controller controls the cooling system to work.
When the rotating speed of the generator is monitored to reach 3.5 revolutions per minute, the main controller sends a run instruction to the variable flow controller.
And after receiving the run instruction, the converter side is controlled by the converter controller to enter a working state. While simultaneously feeding back rdy ref status to the master controller.
And after receiving the rdy ref state, the main controller controls the wind generating set to enter a grid-connected power generation state.
It can be understood that, in the embodiment shown in fig. 2, the cancel run grid instruction is a first instruction for controlling the grid side of the converter to stop working; the command for controlling the cooling system to stop working is a second command for controlling the cooling system of the converter to stop working; the run grid instruction is a third instruction for controlling the network side of the converter to start to work; the command for controlling the start-up operation of the cooling system is a fourth command for controlling the start-up operation of the cooling system. The state of the reversed rdy run is first information for indicating that the converter grid side stops working; the rdy run state is the second information indicating that the converter grid side is working.
For the same wind generating set, when the control method provided by the embodiment of the invention is not adopted, namely the control method in the prior art is adopted, the power consumption of the wind generating set in a period of time is obtained. And then, the control method provided by the embodiment of the invention is applied to the wind generating set to obtain the power consumption of the wind generating set in the same time period as the time period. By comparing the power consumption, the control method for the wind generating set provided by the embodiment of the invention has the advantages that the power consumption of the wind generating set is low, and the power consumption can be saved. A schematic diagram comparing the power consumption of the wind generating set adopting the control method provided by the embodiment of the invention with the power consumption of the wind generating set adopting the control method in the prior art is shown in fig. 3.
Corresponding to the method embodiment, the embodiment of the invention also provides a main controller for the wind generating set.
As shown in fig. 4, fig. 4 is a schematic structural diagram of a main controller provided in an embodiment of the present application. It may include:
a determining module 401, configured to determine whether the wind turbine generator system reaches a preset shutdown condition;
the generating module 402 is configured to generate a first instruction for controlling a converter grid side of the wind turbine generator system to stop working when the determining module 401 determines that the wind turbine generator system reaches a preset shutdown condition;
the sending module 403 is configured to send a first instruction to a variable current controller of the wind turbine generator system.
In one embodiment of the invention, the master controller further comprises:
a receiving module (not shown in the figure) for receiving the first information fed back by the variable flow controller; the first information is used for indicating that the grid side of the converter stops working;
a generating module 402, further configured to generate a second instruction for controlling the cooling system of the converter to stop operating;
the sending module 403 is further configured to send a second instruction to the variable flow controller.
In an embodiment of the present invention, the determining module 401 is further configured to determine whether the wind generating set reaches a preset startup condition;
the generating module 402 is further configured to generate a third instruction for controlling the converter grid side to start working when the determining module 401 determines that the wind generating set reaches a preset startup condition;
the sending module 403 is further configured to send a third instruction to the variable flow controller.
In an embodiment of the present invention, the receiving module is further configured to receive second information fed back by the variable flow controller; the second information is used for indicating that the network side of the converter works;
a generating module 402, configured to generate a fourth instruction for controlling a start-up operation of the cooling system;
the sending module 403 is further configured to send a fourth instruction to the variable current controller.
In an embodiment of the present invention, the determining module 401 may be specifically configured to:
and determining whether the wind generating set reaches a preset shutdown condition or a preset startup condition according to the wind speed or the rotating speed of a generator of the wind generating set.
According to the main controller for the wind generating set, the converter grid side of the wind generating set is not always in the working state, so that the electric quantity consumption can be saved, and further, the cooling system is not always in the working state, so that the electric quantity consumption can also be saved.
Corresponding to the method embodiment, the embodiment of the invention also provides a variable flow controller for the wind generating set.
As shown in fig. 5, fig. 5 is a schematic structural diagram illustrating a variable current controller provided in an embodiment of the present application. It may include:
the receiving unit 501 is used for receiving a first instruction which is sent by a main controller of the wind generating set and used for controlling a converter grid side of the wind generating set to stop working;
and the control unit 502 is used for controlling the grid side of the converter to stop working according to the first instruction.
In one embodiment of the invention, the variable flow controller further comprises:
a feedback unit (not shown in the figure) for feeding back first information indicating that the grid side of the converter stops working to the main controller;
the receiving unit 501 is further configured to receive a second instruction sent by the main controller and used for controlling the cooling system of the converter to stop working;
the control unit 502 is further configured to control the cooling system to stop operating according to the second instruction.
In an embodiment of the present invention, the receiving unit 501 is further configured to receive a third instruction sent by the main controller for controlling the converter grid-side to start operation;
and the control unit 502 is further configured to control the network side of the converter to operate according to the third instruction.
In an embodiment of the present invention, the feedback unit is further configured to feed back, to the main controller, second information indicating that the grid side of the converter is operating;
the receiving unit 501 is further configured to receive a fourth instruction sent by the main controller and used for controlling the cooling system to start up;
a control unit 502 for controlling the operation of the cooling system according to a fourth command
According to the converter controller for the wind generating set, the converter grid side of the wind generating set is not always in the working state, so that the electric quantity consumption can be saved, and further, a cooling system is not always in the working state, so that the electric quantity consumption can be saved.
It is to be understood that the invention is not limited to the specific arrangements and instrumentality described above and shown in the drawings. A detailed description of known methods is omitted herein for the sake of brevity. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present invention are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications and additions or change the order between the steps after comprehending the spirit of the present invention.
The functional blocks shown in the above-described structural block diagrams 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, plug-in, function card, or the like. When implemented in software, the elements of the invention are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" may include any medium that can store or transfer information. Examples of a machine-readable medium 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 so forth. The code segments may be downloaded via computer networks such as the internet, intranet, etc.
As described above, only the specific embodiments of the present invention are provided, and it can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the module and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.
Claims (11)
1. A control method for a wind generating set, wherein the wind generating set comprises a main controller and a variable flow controller which is in communication connection with the main controller, and the method comprises the following steps:
when the main controller determines that the wind generating set reaches a preset shutdown condition, generating and sending a first instruction for controlling a converter network side of the wind generating set to stop working to the converter controller;
the converter controller receives the first instruction and controls the converter network side to stop working according to the first instruction;
the variable flow controller feeds back first information to the main controller; wherein the first information is used for indicating that the converter grid side stops working;
the main controller receives the first information, generates and sends a second instruction for controlling a cooling system of the converter to stop working to the converter controller;
and the variable flow controller receives the second instruction and controls the cooling system to stop working according to the second instruction.
2. The method of claim 1, further comprising:
when the main controller determines that the wind generating set reaches a preset starting condition, generating and sending a third instruction for controlling the converter grid side to start to work to the converter controller;
and the converter controller receives the third instruction and controls the converter network side to work according to the third instruction.
3. The method of claim 2, further comprising:
the variable flow controller feeds back second information to the main controller; wherein the second information is used for indicating that the network side of the converter is operated;
the main controller receives the second information, generates and sends a fourth instruction for controlling the cooling system to start to work to the variable flow controller;
and the variable flow controller receives the fourth instruction and controls the cooling system to work according to the fourth instruction.
4. The method of claim 3, wherein the main controller determines that the wind turbine generator set reaches the preset shutdown condition and the preset startup condition is determined according to a wind speed or a rotational speed of a generator of the wind turbine generator set.
5. A main controller for a wind generating set, the main controller comprising:
the determining module is used for determining whether the wind generating set reaches a preset shutdown condition;
the generating module is used for generating a first instruction for controlling a converter grid side of the wind generating set to stop working when the determining module determines that the wind generating set reaches a preset shutdown condition;
the sending module is used for sending the first instruction to a variable flow controller of the wind generating set;
the receiving module is used for receiving first information fed back by the variable flow controller; wherein the first information is used for indicating that the converter grid side stops working;
the generating module is further used for generating a second instruction for controlling the cooling system of the converter to stop working;
the sending module is further configured to send the second instruction to the variable flow controller.
6. The main controller according to claim 5, wherein the determining module is further configured to determine whether the wind turbine generator set reaches a preset startup condition;
the generating module is further configured to generate a third instruction for controlling the converter grid side to start working when the determining module determines that the wind generating set reaches a preset startup condition;
the sending module is further configured to send the third instruction to the variable flow controller.
7. The master controller according to claim 6, wherein the receiving module is further configured to receive second information fed back by the variable flow controller; wherein the second information is used for indicating that the network side of the converter is operated;
the generating module is further used for generating a fourth instruction for controlling the starting operation of the cooling system;
the sending module is further configured to send the fourth instruction to the variable flow controller.
8. The master controller according to claim 7, wherein the determining module is specifically configured to:
and determining whether the wind generating set reaches a preset shutdown condition or a preset startup condition according to the wind speed or the rotating speed of a generator of the wind generating set.
9. A variable flow controller for a wind generating set is characterized by comprising:
the receiving unit is used for receiving a first instruction which is sent by a main controller of the wind generating set and used for controlling a converter grid side of the wind generating set to stop working;
the control unit is used for controlling the grid side of the converter to stop working according to the first instruction;
the feedback unit is used for feeding back first information for indicating that the grid side of the converter stops working to the main controller;
the receiving unit is further used for receiving a second instruction which is sent by the main controller and used for controlling the cooling system of the converter to stop working;
and the control unit is also used for controlling the cooling system to stop working according to the second instruction.
10. The variable flow controller according to claim 9, wherein the receiving unit is further configured to receive a third instruction sent by the main controller for controlling the converter grid-side to start operation;
and the control unit is also used for controlling the grid side of the converter to work according to the third instruction.
11. The variable flow controller of claim 10, wherein the feedback unit is further configured to feed back to the master controller a second message indicating that the converter grid side is operating;
the receiving unit is further used for receiving a fourth instruction sent by the main controller and used for controlling the cooling system to start to work;
and the control unit is also used for controlling the cooling system to work according to the fourth instruction.
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