CN115875201A - Buffer operation duration optimization method and system for wind turbine generator - Google Patents
Buffer operation duration optimization method and system for wind turbine generator Download PDFInfo
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Abstract
The application provides a buffer operation duration optimization method and system for a wind turbine generator, wherein the method comprises the following steps: when the working condition of the wind turbine needs to be changed, acquiring a corresponding control signal when the working condition of the wind turbine needs to be changed; determining a transmission sequence of the control signal in the wind turbine generator and a transmission delay grade corresponding to each transmission process according to the control signal; determining the delay time of each transmission delay grade according to the per-unit value of the main output physical quantity of the starting point component and the per-unit value of the main output physical quantity of the end point component corresponding to each transmission delay grade; and sequencing the delay time of each transmission delay grade from small to large according to the transmission delay grades to form a delay sequence, and optimizing the buffer operation time of the wind turbine generator based on the delay sequence. According to the technical scheme, the risk of unit integrity oscillation and damage caused by working condition change is avoided to the greatest extent, and the reliability of unit operation is improved.
Description
Technical Field
The application relates to the field of wind turbine generator control, in particular to a method and a system for optimizing buffer operation duration of a wind turbine generator.
Background
A complete wind turbine generator system from the energy transfer perspective has included a plurality of parts, including fan wheel, fan driving chain, generator, converter, grid-connected system, master control system etc.. The change of the working condition of the wind turbine generator is executed from the main control system, then the main execution component executes the change (the main execution component is a fan impeller under the condition of different kinds of working condition changes, for example, the working condition of the pitch angle changes, the change of the working condition of grid-connected power or rotating speed and torque, the main execution component is a converter and a generator), and then the working condition change occurs naturally in turn according to the connection relation with the main execution component.
The prior technical scheme is carried out according to the naturally occurring sequence of the working condition change, and does not carry out human intervention on the process of the working condition change. However, the prior art cannot interfere with the fluctuation or oscillation influence of the change of the working condition on the wind turbine generator, so that the wind turbine generator is unstable in operation and has instability or even serious faults when the working condition is changed greatly.
Disclosure of Invention
The application provides a buffer operation time length optimization method and system for a wind turbine generator, and the technical problems that the wind turbine generator cannot be operated unstably and even fails seriously when the working condition is changed to a large extent due to the fact that intervention cannot be caused on fluctuation or oscillation type influence of the working condition change on the wind turbine generator are solved.
An embodiment of a first aspect of the present application provides a buffer operation duration optimization method for a wind turbine generator, where the method includes:
when the working condition of the wind turbine needs to be changed, acquiring a corresponding control signal when the working condition of the wind turbine needs to be changed;
determining a transmission sequence of the control signal in the wind turbine generator and a transmission delay grade corresponding to each transmission process according to the control signal;
determining the delay time of each transmission delay grade according to the per-unit value of the main output physical quantity of the starting point component and the per-unit value of the main output physical quantity of the end point component corresponding to each transmission delay grade;
and sequencing the delay time of each transmission delay grade from small to large according to the transmission delay grades to form a delay sequence, and optimizing the buffer operation time of the wind turbine generator based on the delay sequence.
Preferably, the determining, according to the control signal, a transmission sequence of the control signal in the wind turbine generator and a transmission delay level corresponding to each transmission process includes:
when the control signal is used for controlling the rotating speed of the wind turbine generator, the control signal is sequentially input into a master control system, a generator, a converter, a fan transmission chain, a fan impeller and a grid-connected system of the wind turbine generator, the transmission delay from the master control system to the generator is set as first-stage delay, the transmission delay from the generator to the converter and the fan transmission chain is set as second-stage delay, and the transmission delay from the converter and the fan transmission chain to the fan impeller and the grid-connected system is set as third-stage delay;
when the control signal is used for controlling the torque or the power of the wind turbine generator, the control signal is sequentially input into a main control system, a converter, a generator, a grid-connected system, a fan transmission chain and a fan impeller of the wind turbine generator, the transmission delay from the main control system to the converter is set as first-stage delay, the transmission delay from the converter to the generator and the grid-connected system is set as second-stage delay, the transmission delay from the generator and the grid-connected system to the fan transmission chain is set as third-stage delay, and the transmission delay from the fan transmission chain to the fan impeller is set as fourth-stage delay;
when the control signal is used for controlling the pitch angle of the wind turbine generator, the control signal is sequentially input into a master control system, a fan impeller, a fan transmission chain, a generator, a converter and a grid-connected system of the wind turbine generator, the transmission delay from the master control system to the fan impeller is set as first-stage delay, the transmission delay from the fan impeller to the fan transmission chain is set as second-stage delay, the transmission delay from the fan transmission chain to the generator is set as third-stage delay, the transmission delay from the generator to the converter is set as fourth-stage delay, and the transmission delay from the converter to the grid-connected system is set as fifth-stage delay.
Further, the determining the delay time length of each transmission delay level according to the per unit value of the starting-point component main output physical quantity and the per unit value of the ending-point component main output physical quantity corresponding to each transmission delay level includes:
acquiring the average transmission delay of the control signal from the starting point component to the end point component corresponding to each transmission delay grade under the control signal;
and determining the delay time length of each transmission delay grade under the control signal according to the average transmission delay from the starting point component to the end point component, the per unit value of the main output physical quantity of the starting point component and the per unit value of the main output physical quantity of the end point component, which correspond to each transmission delay grade under the control signal.
Further, the following formula for calculating the delay time of each transmission delay class according to the control signal is as follows:
in the formula, T i Delay duration for the i-th transmission delay class, A i (t) i-th transmission delay at current time t, etcPer unit value of the principal output physical quantity of the stage starting point unit, B i (t) is a per unit value of the main output physical quantity of the ith-stage transmission delay level end point component at the current time t,
the average transmission delay from the starting point component to the end point component of the control signal corresponding to the ith transmission delay level is i ∈ [ 1-N [ ]]And N is the total number of transmission delay grades under the control signal.
An embodiment of a second aspect of the present application provides a buffer operation duration optimization system for a wind turbine generator, where the system includes:
the acquisition module is used for acquiring a corresponding control signal when the working condition of the wind turbine generator needs to be changed;
the first determining module is used for determining the transmission sequence of the control signals in the wind turbine generator and the transmission delay grades corresponding to the transmission processes according to the control signals;
a second determining module, configured to determine a delay time length of each transmission delay class according to the per unit value of the starting-point component main output physical quantity and the per unit value of the ending-point component main output physical quantity corresponding to each transmission delay class;
and the optimization module is used for sequencing the delay time of each transmission delay grade from small to large according to the transmission delay grades to form a delay sequence, and optimizing the buffer operation time of the wind turbine generator based on the delay sequence.
Preferably, the first determining module is specifically configured to:
when the control signal is used for controlling the rotating speed of the wind turbine generator, the control signal is sequentially input into a master control system, a generator, a converter, a fan transmission chain, a fan impeller and a grid-connected system of the wind turbine generator, the transmission delay from the master control system to the generator is set as first-stage delay, the transmission delay from the generator to the converter and the fan transmission chain is set as second-stage delay, and the transmission delay from the converter and the fan transmission chain to the fan impeller and the grid-connected system is set as third-stage delay;
when the control signal is used for controlling the torque or the power of the wind turbine generator, the control signal is sequentially input into a master control system, a converter, a generator, a grid-connected system, a fan transmission chain and a fan impeller of the wind turbine generator, the transmission delay from the master control system to the converter is set as first-stage delay, the transmission delay from the converter to the generator and the grid-connected system is set as second-stage delay, the transmission delay from the generator and the grid-connected system to the fan transmission chain is set as third-stage delay, and the transmission delay from the fan transmission chain to the fan impeller is set as fourth-stage delay;
when the control signal is used for controlling the pitch angle of the wind turbine generator, the control signal is sequentially input into a master control system, a fan impeller, a fan transmission chain, a generator, a converter and a grid-connected system of the wind turbine generator, the transmission delay from the master control system to the fan impeller is set as first-stage delay, the transmission delay from the fan impeller to the fan transmission chain is set as second-stage delay, the transmission delay from the fan transmission chain to the generator is set as third-stage delay, the transmission delay from the generator to the converter is set as fourth-stage delay, and the transmission delay from the converter to the grid-connected system is set as fifth-stage delay.
Preferably, the second determining module includes:
the acquisition unit is used for acquiring the average transmission delay of the control signal corresponding to each transmission delay grade under the control signal from the starting point component to the end point component;
and the determining unit is used for determining the delay time of each transmission delay level under the control signal according to the average transmission delay from the starting point component to the end point component of the control signal corresponding to each transmission delay level under the control signal, the per-unit value of the main output physical quantity of the starting point component and the per-unit value of the main output physical quantity of the end point component.
Further, the calculation formula of the delay time of each transmission delay level under the control signal is as follows:
in the formula, T i Delay time length of ith transmission delay class, A i (t) is the unit value of the main output physical quantity of the ith-stage transmission delay level starting point component at the current time t, B i (t) is a per unit value of the main output physical quantity of the ith-stage transmission delay level end point component at the current time t,
the average transmission delay from the starting point component to the end point component of the control signal corresponding to the ith transmission delay level is represented by i E [ 1-N [ ]]And N is the total number of transmission delay grades under the control signal. . . . .
An embodiment of a third aspect of the present application provides an electronic device, including: memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method as described in the embodiments of the first aspect when executing the program.
An embodiment of a fourth aspect of the present application provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method as described in the embodiment of the first aspect.
The technical scheme provided by the embodiment of the application at least has the following beneficial effects:
the application provides a buffer operation duration optimization method and system for a wind turbine generator, wherein the method comprises the following steps: when the working condition of the wind turbine generator needs to be changed, acquiring a corresponding control signal when the working condition of the wind turbine generator needs to be changed; determining a transmission sequence of the control signal in the wind turbine generator and a transmission delay grade corresponding to each transmission process according to the control signal; determining the delay time of each transmission delay grade according to the per unit value of the main output physical quantity of the starting point component and the per unit value of the main output physical quantity of the end point component corresponding to each transmission delay grade; and sequencing the delay time of each transmission delay grade from small to large according to the transmission delay grades to form a delay sequence, and optimizing the buffer operation time of the wind turbine generator based on the delay sequence. According to the technical scheme, the risk of unit integrity oscillation and damage caused by working condition change is avoided to the greatest extent, and the reliability of unit operation is improved.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart of a buffer operation duration optimization method for a wind turbine generator according to an embodiment of the present application;
fig. 2 is a structural diagram of a buffer operation duration optimization system for a wind turbine generator according to an embodiment of the present application;
FIG. 3 is a diagram of a second determination module configured according to one embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
The application provides a buffer operation time length optimization method and system for a wind turbine generator, and the method comprises the following steps: when the working condition of the wind turbine needs to be changed, acquiring a corresponding control signal when the working condition of the wind turbine needs to be changed; determining a transmission sequence of the control signal in the wind turbine generator and a transmission delay grade corresponding to each transmission process according to the control signal; determining the delay time of each transmission delay grade according to the per unit value of the main output physical quantity of the starting point component and the per unit value of the main output physical quantity of the end point component corresponding to each transmission delay grade; and sequencing the delay time of each transmission delay grade from small to large according to the transmission delay grades to form a delay sequence, and optimizing the buffer operation time of the wind turbine generator based on the delay sequence. According to the technical scheme, the risk of unit integrity oscillation and damage caused by working condition change is avoided to the greatest extent, and the reliability of unit operation is improved.
The following describes a method and a system for optimizing buffer operation duration of a wind turbine generator according to an embodiment of the present application with reference to the accompanying drawings.
Example one
Fig. 1 is a flowchart of a buffer operation duration optimization method for a wind turbine generator according to an embodiment of the present application, and as shown in fig. 1, the method includes:
step 1: when the working condition of the wind turbine needs to be changed, acquiring a corresponding control signal when the working condition of the wind turbine needs to be changed;
and 2, step: determining a transmission sequence of the control signal in the wind turbine generator and a transmission delay grade corresponding to each transmission process according to the control signal;
in an embodiment of the present disclosure, the step 2 specifically includes:
when the control signal is used for controlling the rotating speed of the wind turbine generator, the control signal is sequentially input into a main control system, a generator, a converter, a fan transmission chain, a fan impeller and a grid-connected system of the wind turbine generator, the transmission delay from the main control system to the generator is set as first-stage delay, the transmission delay from the generator to the converter and the fan transmission chain is set as second-stage delay, and the transmission delay from the converter and the fan transmission chain to the fan impeller and the grid-connected system is set as third-stage delay;
when the control signal is used for controlling the torque or the power of the wind turbine generator, the control signal is sequentially input into a master control system, a converter, a generator, a grid-connected system, a fan transmission chain and a fan impeller of the wind turbine generator, the transmission delay from the master control system to the converter is set as first-stage delay, the transmission delay from the converter to the generator and the grid-connected system is set as second-stage delay, the transmission delay from the generator and the grid-connected system to the fan transmission chain is set as third-stage delay, and the transmission delay from the fan transmission chain to the fan impeller is set as fourth-stage delay;
when the control signal is used for controlling the pitch angle of the wind turbine generator, the control signal is sequentially input into a main control system, a fan impeller, a fan transmission chain, a generator, a converter and a grid-connected system of the wind turbine generator, the transmission delay from the main control system to the fan impeller is set as first-stage delay, the transmission delay from the fan impeller to the fan transmission chain is set as second-stage delay, the transmission delay from the fan transmission chain to the generator is set as third-stage delay, the transmission delay from the generator to the converter is set as fourth-stage delay, and the transmission delay from the converter to the grid-connected system is set as fifth-stage delay.
And step 3: determining the delay time of each transmission delay grade according to the per unit value of the main output physical quantity of the starting point component and the per unit value of the main output physical quantity of the end point component corresponding to each transmission delay grade;
in an embodiment of the present disclosure, the step 3 specifically includes:
step 3-1: acquiring the average transmission delay of the control signal from the starting point component to the end point component corresponding to each transmission delay level under the control signal;
step 3-2: and determining the delay time length of each transmission delay grade under the control signal according to the average transmission delay from the starting point component to the end point component, the per unit value of the main output physical quantity of the starting point component and the per unit value of the main output physical quantity of the end point component, which correspond to each transmission delay grade under the control signal.
Wherein, the calculation formula of the delay time of each transmission delay grade under the control signal is as follows:
in the formula, T i Delay time length of ith transmission delay class, A i (t) is the unit value of the main output physical quantity of the ith-stage transmission delay level starting point component at the current time t, B i (t) is the main output physical quantity of the ith transmission delay level end part at the current time tThe per-unit value is set to be,
the average transmission delay from the starting point component to the end point component of the control signal corresponding to the ith transmission delay level is represented by i E [ 1-N [ ]]And N is the total number of transmission delay grades under the control signal.
And 4, step 4: and sequencing the delay time of each transmission delay grade from small to large according to the transmission delay grades to form a delay sequence, and optimizing the buffer operation time of the wind turbine generator based on the delay sequence.
In order to more clearly describe the implementation process of the buffer operation duration optimization method for the wind turbine generator according to the embodiment of the present application, a specific method embodiment is described in detail below:
step 1) inputting a requirement for changing the working condition of the wind turbine generator, and if the main physical quantity of the working condition is the rotating speed, turning to step 2); if the main physical quantity of the working condition is torque or power, turning to step 3); if the main physical quantity of the working condition is the pitch angle, turning to the step 4);
step 2) setting a working condition change sequence table as (main control system → generator → converter, fan transmission chain → fan impeller and grid-connected system), and defining the first-stage time delay T1 as the working condition transmission time delay of the main control system → generator; the second-stage delay T2 is defined as the working condition transmission delay of the generator → a converter and a fan transmission chain; the third-stage delay T3 is defined as the working condition transmission delay of a converter, a fan transmission chain → a fan impeller and a grid-connected system, the serial stage number N =3 of the system is switched to the step 5);
step 3) setting a working condition change sequence table as (main control system → converter → generator, grid-connected system → fan transmission chain → fan impeller), and defining the first-stage time delay T1 as the working condition transmission time delay of the main control system → converter; the second-stage delay T2 is defined as the working condition transmission delay of a converter → a generator and a grid-connected system; the third stage delay T3 is defined as the working condition transmission delay of the generator → the fan transmission chain; defining the fourth-stage delay T4 as the transmission delay of the working condition of the fan transmission chain → the fan impeller, and switching to the step 5 if the serial stage number of the system is N = 4);
step 4), setting a working condition change sequence table as (main control system → fan impeller → fan transmission chain → generator → converter → grid-connected system), and defining the first-stage time delay T1 as the working condition transmission time delay of the main control system → fan impeller; the second-stage delay T2 is defined as the working condition transmission delay of the fan impeller → the fan transmission chain; the third-stage delay T3 is defined as the working condition transmission delay of the fan transmission chain → the generator; the fourth-stage delay T4 is defined as the working condition transmission delay of the fan generator → the converter; defining the fifth-stage delay T5 as the working condition transmission delay of the converter → the grid-connected system, and turning to the step 5, wherein the serial stage number of the system is N = 5);
step 5) i =1;
step 6) using the formula
Calculating the value (in s) of the ith stage delay Ti, wherein T is i Delay duration for the i-th transmission delay class, A i (t) is the unit value of the main output physical quantity of the ith-stage transmission delay level starting point component at the current time t, B i (t) is the unit value of the master output physical quantity of the ith transmission delay level end point component at the current time t, and the unit value is greater than or equal to the unit value of the master output physical quantity of the ith transmission delay level end point component at the current time t>
The average transmission delay from a starting point component to an end point component of a control signal corresponding to the ith transmission delay level is directly input in the unit of s, the average transmission delay is an external system parameter of the wind turbine generator, and i belongs to [ 1-N ]]N is the total number of transmission delay levels under the control signal;
step 7) judging whether i is smaller than N, if so, making i = i +1, and returning to the step 6); if not, go to step 8)
And 8) finishing calculation, and outputting the working condition change sequence table and the values of T1-TN at the moment as final output.
It should be noted that the wind turbine generator is particularly referred to as a direct-drive wind turbine generator in this embodiment;
when the buffer operation is performed on the system, when the working condition changes, the operation working conditions of all the sub-components of the system do not change along with the response immediately, but change one by one according to the time sequence, so as to improve the operation mode of the system operation stability.
In summary, according to the method for optimizing the buffer operation duration of the wind turbine generator set provided by this embodiment, after the master control system changes the operating conditions, the sequence and time of the changes of the operating conditions of the other components are manually controlled, and the operating condition change time sequence table under manual intervention is generated, so that the risks of integral oscillation and damage of the wind turbine generator set caused by the changes of the operating conditions are avoided to the greatest extent, and the reliability of the operation of the wind turbine generator set is improved.
Example two
Fig. 2 is a structural diagram of a buffer operation duration optimization system of a wind turbine generator according to an embodiment of the present application, and as shown in fig. 2, the system includes:
the acquiring module 100 is configured to acquire a corresponding control signal when a working condition of the wind turbine needs to be changed when the working condition of the wind turbine needs to be changed;
the first determining module 200 is configured to determine, according to the control signal, a transmission sequence of the control signal in the wind turbine generator and a transmission delay level corresponding to each transmission process;
a second determining module 300, configured to determine a delay time duration of each transmission delay class according to the per unit value of the starting-point component main output physical quantity and the per unit value of the ending-point component main output physical quantity corresponding to each transmission delay class;
and the optimizing module 400 is configured to sort the delay durations of the transmission delay levels from small to large according to the transmission delay levels to form a delay sequence, and optimize the buffer operation duration of the wind turbine generator based on the delay sequence.
In an embodiment of the present disclosure, the first determining module 200 is specifically configured to:
when the control signal is used for controlling the rotating speed of the wind turbine generator, the control signal is sequentially input into a main control system, a generator, a converter, a fan transmission chain, a fan impeller and a grid-connected system of the wind turbine generator, the transmission delay from the main control system to the generator is set as first-stage delay, the transmission delay from the generator to the converter and the fan transmission chain is set as second-stage delay, and the transmission delay from the converter and the fan transmission chain to the fan impeller and the grid-connected system is set as third-stage delay;
when the control signal is used for controlling the torque or the power of the wind turbine generator, the control signal is sequentially input into a master control system, a converter, a generator, a grid-connected system, a fan transmission chain and a fan impeller of the wind turbine generator, the transmission delay from the master control system to the converter is set as first-stage delay, the transmission delay from the converter to the generator and the grid-connected system is set as second-stage delay, the transmission delay from the generator and the grid-connected system to the fan transmission chain is set as third-stage delay, and the transmission delay from the fan transmission chain to the fan impeller is set as fourth-stage delay;
when the control signal is used for controlling the pitch angle of the wind turbine generator, the control signal is sequentially input into a master control system, a fan impeller, a fan transmission chain, a generator, a converter and a grid-connected system of the wind turbine generator, the transmission delay from the master control system to the fan impeller is set as first-stage delay, the transmission delay from the fan impeller to the fan transmission chain is set as second-stage delay, the transmission delay from the fan transmission chain to the generator is set as third-stage delay, the transmission delay from the generator to the converter is set as fourth-stage delay, and the transmission delay from the converter to the grid-connected system is set as fifth-stage delay.
In an embodiment of the disclosure, as shown in fig. 3, the second determining module 300 includes:
an obtaining unit 301, configured to obtain an average transmission delay from a starting point component to an end point component of a control signal corresponding to each transmission delay level under the control signal;
a determining unit 302, configured to determine a delay time duration of each transmission delay level under the control signal according to an average transmission delay from the starting point component to the ending point component of the control signal corresponding to each transmission delay level under the control signal, a per-unit value of the main output physical quantity of the starting point component, and a per-unit value of the main output physical quantity of the ending point component.
Wherein, the calculation formula of the delay time of each transmission delay grade under the control signal is as follows:
in the formula, T i Delay duration for the i-th transmission delay class, A i (t) is the per unit value of the main output physical quantity of the ith transmission delay level starting component at the current time t, B i (t) is a per unit value of the main output physical quantity of the ith-stage transmission delay level end point component at the current time t,
the average transmission delay from the starting point component to the end point component of the control signal corresponding to the ith transmission delay level is i ∈ [ 1-N [ ]]And N is the total number of transmission delay grades under the control signal.
In summary, according to the buffer operation duration optimization system for the wind turbine generator, after the master control system changes the operating conditions, the sequence and time of changing the operating conditions of the other components are manually controlled, and the operating condition change time sequence table under manual intervention is generated, so that risks of integral oscillation and damage of the wind turbine generator caused by the change of the operating conditions are avoided to the greatest extent, and the reliability of the operation of the wind turbine generator is improved.
EXAMPLE III
In order to implement the above embodiments, the present disclosure also provides an electronic device, including: the system comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the method according to the first embodiment.
Example four
In order to implement the above-mentioned embodiments, the present disclosure also proposes a computer-readable storage medium on which a computer program is stored, which when executed by a processor implements the method according to the first embodiment.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. A buffer operation duration optimization method for a wind turbine generator is characterized by comprising the following steps:
when the working condition of the wind turbine needs to be changed, acquiring a corresponding control signal when the working condition of the wind turbine needs to be changed;
determining a transmission sequence of the control signal in the wind turbine generator and a transmission delay grade corresponding to each transmission process according to the control signal;
determining the delay time of each transmission delay grade according to the per-unit value of the main output physical quantity of the starting point component and the per-unit value of the main output physical quantity of the end point component corresponding to each transmission delay grade;
and sequencing the delay time of each transmission delay grade from small to large according to the transmission delay grades to form a delay sequence, and optimizing the buffer operation time of the wind turbine generator based on the delay sequence.
2. The method of claim 1, wherein the determining, according to the control signal, a transmission sequence of the control signal in the wind turbine generator and a transmission delay level corresponding to each transmission process comprises:
when the control signal is used for controlling the rotating speed of the wind turbine generator, the control signal is sequentially input into a main control system, a generator, a converter, a fan transmission chain, a fan impeller and a grid-connected system of the wind turbine generator, the transmission delay from the main control system to the generator is set as first-stage delay, the transmission delay from the generator to the converter and the fan transmission chain is set as second-stage delay, and the transmission delay from the converter and the fan transmission chain to the fan impeller and the grid-connected system is set as third-stage delay;
when the control signal is used for controlling the torque or the power of the wind turbine generator, the control signal is sequentially input into a main control system, a converter, a generator, a grid-connected system, a fan transmission chain and a fan impeller of the wind turbine generator, the transmission delay from the main control system to the converter is set as first-stage delay, the transmission delay from the converter to the generator and the grid-connected system is set as second-stage delay, the transmission delay from the generator and the grid-connected system to the fan transmission chain is set as third-stage delay, and the transmission delay from the fan transmission chain to the fan impeller is set as fourth-stage delay;
when the control signal is used for controlling the pitch angle of the wind turbine generator, the control signal is sequentially input into a main control system, a fan impeller, a fan transmission chain, a generator, a converter and a grid-connected system of the wind turbine generator, the transmission delay from the main control system to the fan impeller is set as first-stage delay, the transmission delay from the fan impeller to the fan transmission chain is set as second-stage delay, the transmission delay from the fan transmission chain to the generator is set as third-stage delay, the transmission delay from the generator to the converter is set as fourth-stage delay, and the transmission delay from the converter to the grid-connected system is set as fifth-stage delay.
3. The method according to claim 2, wherein determining the delay time duration for each of the transmission delay time levels from the per unit value of the starting-point unit main output physical quantity and the per unit value of the ending-point unit main output physical quantity for each transmission delay time level comprises:
acquiring the average transmission delay of the control signal from the starting point component to the end point component corresponding to each transmission delay grade under the control signal;
and determining the delay time length of each transmission delay grade under the control signal according to the average transmission delay from the starting point component to the end point component, the per unit value of the main output physical quantity of the starting point component and the per unit value of the main output physical quantity of the end point component, which correspond to each transmission delay grade under the control signal.
4. The method of claim 3, wherein said control signal calculates a delay duration for each of said transmission delay levels as follows:
in the formula, T i Delay time length of ith transmission delay class, A i (t) is the per unit value of the main output physical quantity of the ith transmission delay level starting component at the current time t, B i (t) is a per unit value of the main output physical quantity of the i-th stage transmission delay level end point component at the current time t,
the average transmission delay from the starting point component to the end point component of the control signal corresponding to the ith transmission delay level is i ∈ [ 1-N [ ]]N is under the control signalTotal number of transmission delay levels.
5. The utility model provides a long optimizing system of buffering operation of wind turbine generator system which characterized in that, the system includes:
the acquisition module is used for acquiring a corresponding control signal when the working condition of the wind turbine generator needs to be changed;
the first determining module is used for determining the transmission sequence of the control signals in the wind turbine generator and the transmission delay grades corresponding to the transmission processes according to the control signals;
a second determining module, configured to determine the delay time of each transmission delay class according to the per-unit value of the starting-point component main output physical quantity and the per-unit value of the ending-point component main output physical quantity corresponding to each transmission delay class;
and the optimizing module is used for sequencing the delay time of each transmission delay grade from small to large according to the transmission delay grades to form a delay sequence, and optimizing the buffer operation time of the wind turbine generator based on the delay sequence.
6. The system of claim 5, wherein the first determination module is specifically configured to:
when the control signal is used for controlling the rotating speed of the wind turbine generator, the control signal is sequentially input into a master control system, a generator, a converter, a fan transmission chain, a fan impeller and a grid-connected system of the wind turbine generator, the transmission delay from the master control system to the generator is set as first-stage delay, the transmission delay from the generator to the converter and the fan transmission chain is set as second-stage delay, and the transmission delay from the converter and the fan transmission chain to the fan impeller and the grid-connected system is set as third-stage delay;
when the control signal is used for controlling the torque or the power of the wind turbine generator, the control signal is sequentially input into a main control system, a converter, a generator, a grid-connected system, a fan transmission chain and a fan impeller of the wind turbine generator, the transmission delay from the main control system to the converter is set as first-stage delay, the transmission delay from the converter to the generator and the grid-connected system is set as second-stage delay, the transmission delay from the generator and the grid-connected system to the fan transmission chain is set as third-stage delay, and the transmission delay from the fan transmission chain to the fan impeller is set as fourth-stage delay;
when the control signal is used for controlling the pitch angle of the wind turbine generator, the control signal is sequentially input into a master control system, a fan impeller, a fan transmission chain, a generator, a converter and a grid-connected system of the wind turbine generator, the transmission delay from the master control system to the fan impeller is set as first-stage delay, the transmission delay from the fan impeller to the fan transmission chain is set as second-stage delay, the transmission delay from the fan transmission chain to the generator is set as third-stage delay, the transmission delay from the generator to the converter is set as fourth-stage delay, and the transmission delay from the converter to the grid-connected system is set as fifth-stage delay.
7. The system of claim 6, wherein the second determination module comprises:
the acquisition unit is used for acquiring the average transmission delay of the control signal corresponding to each transmission delay grade under the control signal from the starting point component to the end point component;
and the determining unit is used for determining the delay time of each transmission delay grade under the control signal according to the average transmission delay from the starting point component to the end point component of the control signal corresponding to each transmission delay grade under the control signal, the per unit value of the main output physical quantity of the starting point component and the per unit value of the main output physical quantity of the end point component.
8. The system of claim 7, wherein said control signal calculates a delay duration for each of said transmission delay levels as follows:
in the formula, T i Delay duration for the i-th transmission delay class, A i (t) is the unit value of the main output physical quantity of the ith-stage transmission delay level starting point component at the current time t, B i (t) is a per unit value of the main output physical quantity of the i-th stage transmission delay level end point component at the current time t,
the average transmission delay from the starting point component to the end point component of the control signal corresponding to the ith transmission delay level is represented by i E [ 1-N [ ]]And N is the total number of transmission delay grades under the control signal.
9. An electronic device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which when executed by the processor implements the method of any of claims 1 to 4.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1 to 4.
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