A control method and device for a wind turbine generator set

Abstract

In the control method, device, and storage medium of the wind turbine provided by the present disclosure, the historical operation data of the wind turbine is obtained, and based on the historical operation data, an electrical transient simulation model of the wind turbine is established. The different capacities of the wind turbine are simulated by the electrical transient simulation model of the wind turbine, and the simulation results of the grid-connected inrush current corresponding to wind turbines of different capacity levels are obtained. Based on the simulation results, the ratio between the rotation speed of the wind turbine and the wind speed in the electrical transient simulation model of the wind turbine is adjusted to obtain the optimal proportional coefficient between the rotation speed and the wind speed corresponding to wind turbines of different capacity levels. In the process of controlling the speed of the wind turbine, the optimal proportional coefficient is used to determine the optimal closing time of the medium-voltage circuit breaker, and the grid-connected overcurrent is controlled to the optimal state according to the optimal closing time. It can be seen that the present application controls the grid-connected inrush current, reduces the damage of the grid-connected process to the life of the wind turbine, and optimizes the wind turbine speed control strategy.

Description

Technical Field

[0001] The present application relates to the field of wind power generation, and in particular to a control method, device, and storage medium for a wind turbine generator set. Background Art

[0002] With the rapid development of wind power, high-proportion wind power systems have essentially taken shape in some regions. The capacity of onshore wind turbines varies widely, ranging from 1,500 kW to 6,000 kW. However, during the inverter grid-connection phase, the stator inrush current of wind turbines of varying capacities increases proportionally with capacity. This is despite the fact that the inverter controls the stator current by controlling the frequency, phase, and amplitude of the rotor excitation current. However, the wind turbine speed also needs to be considered during the grid-connection process. This ensures that the wind turbine speed is not too low at minimum wind speeds, preventing grid connection, and that the speed is not too high at high wind speeds, resulting in excessive grid inrush current. Summary of the Invention

[0003] The present application provides a control method, device, and storage medium for a wind turbine generator set, so as to control the rotational speed of the wind turbine generator set during the grid connection process.

[0004] The first embodiment of the present application provides a control method for a wind turbine generator system, including:

[0005] Obtain historical operating data of wind turbines;

[0006] Based on the historical operating data, establishing a wind turbine electrical transient simulation model;

[0007] The wind turbine generator system electrical transient simulation model is used to simulate wind turbine generator systems of different capacities, thereby obtaining simulation results of grid-connected inrush currents corresponding to wind turbine generator systems of different capacity levels.

[0008] Based on the simulation results, the ratio between the rotational speed of the wind turbine and the wind speed in the electrical transient simulation model of the wind turbine is adjusted to obtain the optimal proportional coefficient between the rotational speed and wind speed corresponding to wind turbines of different capacity levels, so that in the process of controlling the rotational speed of the wind turbine, the optimal proportional coefficient is used to determine the optimal closing time of the medium-voltage circuit breaker, and the grid-connected overcurrent is controlled to be in the optimal state according to the optimal closing time.

[0009] A second embodiment of the present application provides a control device for a wind turbine generator system, comprising:

[0010] An acquisition module is used to obtain historical operation data of wind turbines;

[0011] An establishment module is used to establish a wind turbine electrical transient simulation model based on the historical operation data;

[0012] A simulation module, configured to simulate different capacities of wind turbines using the wind turbine electrical transient simulation model, and obtain simulation results of grid-connected inrush currents corresponding to wind turbines of different capacity levels;

[0013] A control module is used to adjust the ratio between the rotational speed of the wind turbine and the wind speed in the electrical transient simulation model of the wind turbine based on the simulation results, so as to obtain the optimal proportional coefficient between the rotational speed and the wind speed corresponding to wind turbines of different capacity levels, so as to use the optimal proportional coefficient to determine the optimal closing time of the medium-voltage circuit breaker in the process of controlling the speed of the wind turbine, and control the grid-connected overcurrent to be in an optimal state according to the optimal closing time.

[0014] The computer device proposed in the third embodiment of the present application is characterized in that it includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the program, it implements the method described in the first aspect above.

[0015] The computer storage medium proposed in the fourth embodiment of the present application, wherein the computer storage medium stores computer-executable instructions; after the computer-executable instructions are executed by the processor, the method described in the first aspect above can be implemented.

[0016] The technical solutions provided by the embodiments of this application bring at least the following beneficial effects:

[0017] In the control method, device, and storage medium of the wind turbine provided by the present invention, historical operating data of the wind turbine is obtained, and an electrical transient simulation model of the wind turbine is established based on the historical operating data. The different capacities of the wind turbine are simulated through the electrical transient simulation model of the wind turbine to obtain simulation results of the grid-connected impact current corresponding to wind turbines of different capacity levels. Based on the simulation results, the ratio between the rotational speed of the wind turbine and the wind speed in the electrical transient simulation model of the wind turbine is adjusted to obtain the optimal proportional coefficient between the rotational speed and the wind speed corresponding to wind turbines of different capacity levels. In the process of controlling the rotational speed of the wind turbine, the optimal proportional coefficient is used to determine the optimal closing time of the medium-voltage circuit breaker, and the grid-connected overcurrent is controlled to be in the optimal state according to the optimal closing time. It can be seen from this that the present application obtains the optimal proportional coefficient between the rotational speed and wind speed corresponding to wind turbines of different capacity levels through the electrical transient simulation model of the wind turbine, and then controls the wind turbine based on the optimal proportional coefficient, so that the grid-connected impact current is controlled, reducing the damage to the life of the wind turbine during the grid-connected process. At the same time, the wind turbine speed control strategy is optimized through the optimal proportional coefficient, so that the maximum wind power can be captured during the process from wind turbine startup to grid connection.

[0018] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0020] Figure 1 1 is a flow chart of a control method for a wind turbine generator system according to the present application;

[0021] Figure 2 Schematic diagram of the structure of a control device for a wind turbine generator system according to the present application. DETAILED DESCRIPTION

[0022] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0023] The following describes a control method and device for a wind turbine generator system according to an embodiment of the present application with reference to the accompanying drawings.

[0024] Example 1

[0025] Figure 1 FIG. 1 is a flow chart of a method for controlling a wind turbine generator system according to an embodiment of the present application. Figure 1 As shown, this may include:

[0026] Step 101: Obtain historical operating data of a wind turbine.

[0027] In one embodiment of the present application, the operating data includes wind speed, wind turbine power, wind turbine speed, and power generation power.

[0028] Step 102: Establish a wind turbine electrical transient simulation model based on historical operating data.

[0029] In one embodiment of the present application, based on the above historical operation data, the corresponding historical operation data of wind turbines with different single-unit capacity levels during the grid connection process can be obtained.

[0030] Furthermore, in one embodiment of the present application, an electrical transient simulation model of a wind turbine generator set may be established using the above historical operating data to simulate the grid connection process of the wind turbine generator set.

[0031] Furthermore, in one embodiment of the present application, the wind turbine components simulated in the wind turbine electrical transient simulation model may include a wind turbine impeller, a transmission chain, a generator, and a converter.

[0032] Step 103 : Simulate different capacities of wind turbines using a wind turbine electrical transient simulation model to obtain simulation results of grid-connected inrush currents corresponding to wind turbines of different capacity levels.

[0033] In one embodiment of the present application, the electrical transient simulation model of the wind turbine generator system adopts standard air density, standard atmospheric pressure at normal temperature, and a simulation time of 80 seconds for simulation.

[0034] Furthermore, in one embodiment of the present application, the different capacity levels of the above-mentioned wind turbine generator set may include: 1500kW, 2000kW, 3000kW, and 4800kW.

[0035] Furthermore, in one embodiment of the present application, by simulating wind turbines of different capacities using a wind turbine electrical transient simulation model, the maximum values ​​of fault impulse currents corresponding to wind turbines of different capacity levels can be obtained.

[0036] Specifically, in one embodiment of the present application, the electrical transient simulation model of the above-mentioned wind turbine generator set shows that the fault impact current of a 1500kW wind turbine generator set is 6794A, the maximum fault impact current of a 2000KW wind turbine generator set is 8961A, the maximum fault impact current of a 3000KW wind turbine generator set is 13260A, and the maximum fault impact current of a 4800KW wind turbine generator set is 19830A.

[0037] Step 104 : Based on the simulation results, adjust the ratio between the rotation speed of the wind turbine and the wind speed in the wind turbine electrical transient simulation model to obtain the optimal ratio coefficient between the rotation speed and wind speed corresponding to wind turbines of different capacity levels.

[0038] In one embodiment of the present application, after obtaining the optimal proportional coefficient between the rotational speed and wind speed corresponding to wind turbines of different capacity levels through the above step 104, the optimal proportional coefficient can be used to determine the optimal closing time of the medium-voltage circuit breaker during the process of controlling the speed of the wind turbine, and the grid-connected overcurrent can be controlled to be in the optimal state according to the optimal closing time.

[0039] And, in one embodiment of the present application, the method of determining the optimal closing time of a medium voltage circuit breaker using an optimal proportional coefficient may include: when the speed of the wind turbine reaches the grid-connected speed obtained based on the optimal proportional coefficient, the medium voltage circuit breaker is closed.

[0040] Furthermore, in one embodiment of the present application, by utilizing the optimal proportional coefficient to control the wind turbine speed, the maximum fault inrush current for a 1500kW wind turbine is 5686A, the maximum fault inrush current for a 2000kW wind turbine is 7991A, the maximum fault inrush current for a 3000kW wind turbine is 12100A, and the maximum fault inrush current for a 4800kW wind turbine is 19140A. These results demonstrate that controlling the wind turbine using the optimal proportional coefficient controls the grid-connection inrush current and reduces the damage to the wind turbine lifespan caused by the grid-connection process.

[0041] The present invention provides a control method for a wind turbine, which obtains historical operating data of the wind turbine, establishes an electrical transient simulation model of the wind turbine based on the historical operating data, simulates different capacities of the wind turbine through the electrical transient simulation model of the wind turbine, obtains simulation results of grid-connected inrush current corresponding to wind turbines of different capacity levels, adjusts the ratio between the speed of the wind turbine and the wind speed in the electrical transient simulation model of the wind turbine based on the simulation results, obtains the optimal proportional coefficient between the speed and wind speed corresponding to wind turbines of different capacity levels, and uses the optimal proportional coefficient to determine the optimal closing time of the medium voltage circuit breaker in the process of controlling the speed of the wind turbine, and controls the grid-connected overcurrent in the optimal state according to the optimal closing time. It can be seen that the present invention obtains the optimal proportional coefficient between the speed and wind speed corresponding to wind turbines of different capacity levels through the electrical transient simulation model of the wind turbine, and then controls the wind turbine based on the optimal proportional coefficient, so that the grid-connected inrush current is controlled, the damage to the life of the wind turbine during the grid connection process is reduced, and the wind turbine speed control strategy is optimized through the optimal proportional coefficient, so that the maximum wind power is captured during the process from the start-up of the wind turbine to the grid connection.

[0042] Example 2

[0043] Figure 2 FIG. 1 is a schematic structural diagram of a control device for a wind turbine generator system according to the present application, as shown in FIG. Figure 2 As shown, this may include:

[0044] An acquisition module 201 is used to acquire historical operation data of a wind turbine generator system;

[0045] Establishing module 202, for establishing a wind turbine electrical transient simulation model based on historical operating data;

[0046] The simulation module 203 is used to simulate different capacities of wind turbines using a wind turbine electrical transient simulation model to obtain simulation results of grid-connected inrush currents corresponding to wind turbines of different capacity levels;

[0047] The control module 204 is used to adjust the ratio between the rotational speed of the wind turbine and the wind speed in the electrical transient simulation model of the wind turbine based on the simulation results, and obtain the optimal proportional coefficient between the rotational speed and wind speed corresponding to wind turbines of different capacity levels, so as to use the optimal proportional coefficient to determine the optimal closing time of the medium-voltage circuit breaker in the process of controlling the speed of the wind turbine, and control the grid-connected overcurrent to be in the optimal state according to the optimal closing time.

[0048] The control device of the wind turbine provided by the present disclosure obtains the historical operation data of the wind turbine, establishes the electrical transient simulation model of the wind turbine based on the historical operation data, simulates the different capacities of the wind turbine through the electrical transient simulation model of the wind turbine, obtains the simulation results of the grid-connected inrush current corresponding to the wind turbines of different capacity levels, adjusts the ratio between the speed of the wind turbine and the wind speed in the electrical transient simulation model of the wind turbine based on the simulation results, obtains the optimal proportional coefficient between the speed and wind speed corresponding to the wind turbines of different capacity levels, and uses the optimal proportional coefficient to determine the optimal closing time of the medium voltage circuit breaker in the process of controlling the speed of the wind turbine, and controls the grid-connected overcurrent in the optimal state according to the optimal closing time. It can be seen that the present application obtains the optimal proportional coefficient between the speed and wind speed corresponding to the wind turbines of different capacity levels through the electrical transient simulation model of the wind turbine, and then controls the wind turbine based on the optimal proportional coefficient, so that the grid-connected inrush current is controlled, the damage to the life of the wind turbine during the grid connection process is reduced, and the wind turbine speed control strategy is optimized through the optimal proportional coefficient, so that the maximum wind power is captured during the process from the start-up of the wind turbine to the grid connection.

[0049] In order to implement the above embodiments, the present disclosure also provides a computer device.

[0050] The computer device provided by the embodiment of the present disclosure includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor; when the processor executes the program, it can achieve the following Figure 1 The method shown.

[0051] In order to implement the above embodiments, the present disclosure also proposes a computer storage medium.

[0052] The computer storage medium provided in the embodiment of the present disclosure stores computer executable instructions; after the computer executable instructions are executed by the processor, the following can be achieved: Figure 1 The method shown.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0054] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0055] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A control method for a wind turbine generator system, characterized in that: The method comprises: Obtain historical operating data of wind turbines; Based on the historical operating data, establishing a wind turbine electrical transient simulation model; The wind turbine generator system electrical transient simulation model is used to simulate wind turbine generator systems of different capacities, thereby obtaining simulation results of grid-connected inrush current corresponding to wind turbine generator systems of different capacity levels. Based on the simulation results, adjusting the ratio between the rotational speed of the wind turbine and the wind speed in the electrical transient simulation model of the wind turbine to obtain an optimal proportional coefficient between the rotational speed and the wind speed corresponding to wind turbines of different capacity levels, so as to determine the optimal closing time of the medium voltage circuit breaker using the optimal proportional coefficient during the process of controlling the speed of the wind turbine, and controlling the grid-connected overcurrent to be in an optimal state according to the optimal closing time; In the process of controlling the speed of each wind turbine using the optimal proportional coefficient, the optimal medium voltage circuit breaker closing time is determined, including: when the speed of the wind turbine group reaches the grid-connected speed obtained based on the optimal proportional coefficient, the medium voltage circuit breaker is closed.

2. The method according to claim 1, characterized in that The operating data includes wind speed, wind turbine power, wind turbine speed, and power generation power.

3. The method according to claim 1, characterized in that The wind turbine components simulated in the wind turbine electrical transient simulation model include: a wind turbine impeller, a transmission chain, a generator, and a converter.

4. A control device for a wind turbine generator set, characterized in that: The device comprises: An acquisition module is used to obtain historical operation data of wind turbines; An establishment module is used to establish a wind turbine electrical transient simulation model based on the historical operation data; A simulation module, configured to simulate different capacities of wind turbines using the wind turbine electrical transient simulation model, and obtain simulation results of grid-connected inrush currents corresponding to wind turbines of different capacity levels; A control module is configured to adjust, based on the simulation results, the ratio between the rotational speed of the wind turbine and the wind speed in the electrical transient simulation model of the wind turbine, to obtain an optimal proportional coefficient between the rotational speed and the wind speed corresponding to wind turbines of different capacity levels, so as to use the optimal proportional coefficient to determine an optimal closing time of a medium-voltage circuit breaker during the process of controlling the speed of the wind turbine, and to control the grid-connected overcurrent to an optimal state according to the optimal closing time; the control module is further configured to: When the speed of the wind turbine generator set reaches the grid-connected speed obtained based on the optimal proportional coefficient, the medium voltage circuit breaker is closed.

5. The device according to claim 4, characterized in that The operating data includes wind speed, wind turbine power, wind turbine speed, and power generation power.

6. The device according to claim 4, characterized in that The wind turbine components simulated in the wind turbine electrical transient simulation model include: a wind turbine impeller, a transmission chain, a generator, and a converter.

7. A computer device, characterized in that: The method comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method according to any one of claims 1 to 3 is implemented.

8. A computer storage medium, wherein: The computer storage medium stores computer-executable instructions; after the computer-executable instructions are executed by the processor, the method according to any one of claims 1 to 3 can be implemented.

Images