阅读说明：本技术 一种双风轮风力发电机组运行控制方法 (Operation control method for double-wind-wheel wind generating set ) 是由 蔡玮 胡阳 刘吉臻 房方 张文广 于 2021-09-13 设计创作，主要内容包括：本说明书实施例公开了一种双风轮风力发电机组运行控制方法,包括：定义风轮的运行状态和双风轮风力发电机组的整机运行状态；利用双风轮风力发电机组的来流风速划分双风轮风力发电机组的工作点；针对每一个工作点,确定所有整机运行状态中输出功率最大的状态作为当前工作点的最佳整机运行状态；基于测得的来流风速和最佳整机运行状态表确定前风轮和后风轮的控制参数；基于所述控制参数对前风轮和后风轮进行控制。本发明设计的双风轮机组运行区间划分方法,能够得到双风轮风力发电机组在不同风速下的最佳运行状态,为双风轮风力发电机组的运行控制提供了参考,能够充分发挥双风轮风力发电机组的风能转化能力。(The embodiment of the specification discloses an operation control method for a double-wind-wheel wind generating set, which comprises the following steps: defining the running state of a wind wheel and the whole machine running state of the double-wind-wheel wind generating set; dividing the working points of the double-wind-wheel wind generating set by using the incoming flow wind speed of the double-wind-wheel wind generating set; aiming at each working point, determining the state with the maximum output power in all the complete machine running states as the optimal complete machine running state of the current working point; determining control parameters of a front wind wheel and a rear wind wheel based on the measured incoming flow wind speed and an optimal complete machine operation state table; and controlling the front wind wheel and the rear wind wheel based on the control parameters. The method for dividing the operation interval of the double-wind-wheel wind generating set can obtain the optimal operation state of the double-wind-wheel wind generating set under different wind speeds, provides reference for the operation control of the double-wind-wheel wind generating set, and can fully exert the wind energy conversion capability of the double-wind-wheel wind generating set.)

1. The operation control method of the double-wind-wheel wind generating set is characterized by comprising the following steps:

defining the running state of a wind wheel and the whole machine running state of the double-wind-wheel wind generating set;

dividing the working points of the double-wind-wheel wind generating set by using the incoming flow wind speed of the double-wind-wheel wind generating set;

aiming at each working point, determining the state with the maximum output power in all the complete machine running states as the optimal complete machine running state of the current working point;

determining control parameters of a front wind wheel and a rear wind wheel based on the measured incoming flow wind speed and an optimal complete machine operation state table;

and controlling the front wind wheel and the rear wind wheel based on the control parameters.

2. The method according to claim 1, wherein the defining of the operating state of the wind turbine and the overall operating state of the double wind turbine generator set specifically comprises:

determining the running state of the front wind wheel based on the pitch angle and the rotating speed adjusting range of the front wind wheel;

determining the running state of the rear wind wheel based on the pitch angle and the rotating speed adjusting range of the rear wind wheel;

and determining the running state of the whole machine according to different combinations of the running states of the front wind wheel and the rear wind wheel.

3. The method of claim 2, wherein the method further comprises:

generating a front wind wheel running state code based on the running state of the front wind wheel;

generating a rear wind wheel operation state code based on the operation state of the rear wind wheel;

and generating a complete machine running state code based on the front wind wheel running state code and the rear wind wheel running state code.

4. The method of claim 3, wherein determining the state with the maximum output power among all the complete machine operation states as the optimal complete machine operation state of the current operating point specifically comprises:

screening the state with the maximum output power in all the complete machine running states;

and taking the state with the maximum output power in all the complete machine operation states as the optimal complete machine operation state of the current working point.

5. The method of claim 4, wherein the state with the maximum output power in all the complete machine operation states is screened by an exhaustive traversal method, a genetic algorithm, a particle swarm algorithm or a support vector machine method.

6. The method according to claim 4, wherein the running state of the dual wind turbine generator set is exhausted according to a traversal order of the pitch angle of the front wind turbine, the rotating speed of the front wind turbine, the pitch angle of the rear wind turbine and the rotating speed of the rear wind turbine.

7. The method according to claim 1, wherein the division of the operating point of the double-wind-wheel wind turbine generator set by the incoming wind speed of the double-wind-wheel wind turbine generator set specifically comprises:

the incoming flow wind speed range of the double-wind-wheel wind generating set is divided into a series of typical value working points according to a certain interval step length.

8. The method of claim 7, wherein the operating wind speed range is 3m/s to 21m/s, and the operating wind speed range is divided into the plurality of operating points at intervals of 0.5 m/s.

9. The method of claim 1, wherein the method further comprises: and generating an operation interval table of the double-wind-wheel wind generating set based on the optimal complete machine operation state of all the working points.

10. The method according to claim 9, wherein determining control parameters of the front rotor and the rear rotor based on the measured incoming wind speed and the optimal overall operating state table comprises:

and obtaining target values of the pitch angle and the rotating speed of the front wind wheel and the rear wind wheel by using the incoming flow wind speed measured by the laser radar wind meter as control input and inquiring the operation interval table.

Technical Field

The application relates to the technical field of wind power generation, in particular to a method for controlling the operation of a double-wind-wheel wind generating set.

Background

At present, the mainstream wind generating sets are single-wind-wheel wind generating sets, and the evaluation of the internet surfing pressure shows that the single-wind-wheel wind generating sets have low efficiency, so that high-efficiency wind energy conversion wind generating sets are needed. Although the double-wind-wheel wind generating set has high-efficiency wind energy capturing capacity, the operation interval of the double-wind-wheel wind generating set is not researched theoretically, and the formulation of the operation strategy is also in a blank state.

Disclosure of Invention

In order to solve the above technical problem, the embodiments of the present specification are implemented as follows:

the operation control method for the double-wind-wheel wind generating set provided by the embodiment of the specification comprises the following steps:

defining the running state of a wind wheel and the whole machine running state of the double-wind-wheel wind generating set;

dividing the working points of the double-wind-wheel wind generating set by using the incoming flow wind speed of the double-wind-wheel wind generating set;

aiming at each working point, determining the state with the maximum output power in all the complete machine running states as the optimal complete machine running state of the current working point;

determining control parameters of a front wind wheel and a rear wind wheel based on the measured incoming flow wind speed and an optimal complete machine operation state table;

and controlling the front wind wheel and the rear wind wheel based on the control parameters.

Optionally, the defining of the operating state of the wind wheel and the operating state of the whole wind wheel generator set specifically includes:

determining the running state of the front wind wheel based on the pitch angle and the rotating speed adjusting range of the front wind wheel;

determining the running state of the rear wind wheel based on the pitch angle and the rotating speed adjusting range of the rear wind wheel;

and determining the running state of the whole machine according to different combinations of the running states of the front wind wheel and the rear wind wheel.

Optionally, the method further includes:

generating a front wind wheel running state code based on the running state of the front wind wheel;

generating a rear wind wheel operation state code based on the operation state of the rear wind wheel;

and generating a complete machine running state code based on the front wind wheel running state code and the rear wind wheel running state code.

Optionally, determining a state with the maximum output power among all the complete machine operation states as an optimal complete machine operation state of the current operating point specifically includes:

screening the state with the maximum output power in all the complete machine running states;

and taking the state with the maximum output power in all the complete machine operation states as the optimal complete machine operation state of the current working point.

Optionally, the state with the maximum output power in all the complete machine operation states is screened by an exhaustive traversal mode, a genetic algorithm, a particle swarm algorithm or a support vector machine method.

Optionally, the running state of the double-wind-wheel wind generating set is exhausted according to the traversing sequence of the pitch angle of the front wind wheel, the rotating speed of the front wind wheel, the pitch angle of the rear wind wheel and the rotating speed of the rear wind wheel.

Optionally, dividing the operating point of the double-wind-wheel wind generating set by using the incoming flow wind speed of the double-wind-wheel wind generating set specifically includes:

the incoming flow wind speed range of the double-wind-wheel wind generating set is divided into a series of typical value working points according to a certain interval step length.

Optionally, the operating wind speed range is 3m/s to 21m/s, and the operating wind speed range is divided into a plurality of working points at intervals of 0.5 m/s.

Optionally, the method further includes: and generating an operation interval table of the double-wind-wheel wind generating set based on the optimal complete machine operation state of all the working points.

Optionally, the determining the control parameters of the front wind wheel and the rear wind wheel based on the measured incoming flow wind speed and the optimal complete machine operation state table specifically includes:

and obtaining target values of the pitch angle and the rotating speed of the front wind wheel and the rear wind wheel by using the incoming flow wind speed measured by the laser radar wind meter as control input and inquiring the operation interval table.

The embodiment of the specification adopts at least one technical scheme which can achieve the following beneficial effects:

according to the invention, the pitch angles and the rotating speeds of the two wind wheels of the double-wind-wheel wind generating set are reasonably arranged, so that the double-wind-wheel wind generating set can operate according to the optimal operating state in the operating interval within the allowable range of design parameters, and the wind energy capture efficiency is improved as much as possible.

The method for dividing the operation interval of the double-wind-wheel wind generating set can obtain the optimal operation state of the double-wind-wheel wind generating set under different wind speeds, provides reference for the operation control of the double-wind-wheel wind generating set, and can fully exert the wind energy conversion capability of the double-wind-wheel wind generating set.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic flow chart of an operation control method for a dual-wind-wheel wind turbine generator set provided in an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of an operational state traversal provided by an embodiment of the present disclosure;

FIG. 3 is a schematic diagram illustrating an operation window table optimization process provided in an embodiment of the present disclosure;

fig. 4 is a schematic diagram of an operation strategy provided in an embodiment of the present disclosure.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The invention relates to operation interval division of a double-wind-wheel wind generating set and operation strategy formulation thereof, in particular to optimal interval division of a tandem double-wind-wheel (same-direction or opposite-direction rotation) wind generating set with front and rear wind wheels under the condition of open airflow. Aiming at the double-wind-wheel wind generating set, the operation interval of the double-wind-wheel wind generating set is planned, the operation strategy is formulated, and the operation strategy is guided by using the optimal operation state in the operation interval to control the double-wind-wheel wind generating set to operate.

The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Fig. 1 is a schematic flow chart of an operation control method of a double-wind-wheel wind turbine generator set provided in an embodiment of the present disclosure. As shown in fig. 1, the process may include the following steps:

step 110: defining the running state of a wind wheel and the whole machine running state of the double-wind-wheel wind generating set;

step 120: dividing the working points of the double-wind-wheel wind generating set by using the incoming flow wind speed of the double-wind-wheel wind generating set;

step 130: aiming at each working point, determining the state with the maximum output power in all the complete machine running states as the optimal complete machine running state of the current working point;

step 140: determining control parameters of a front wind wheel and a rear wind wheel based on the measured incoming flow wind speed and an optimal complete machine operation state table;

step 150: and controlling the front wind wheel and the rear wind wheel based on the control parameters.

Optionally, the defining of the operating state of the wind wheel and the operating state of the double-wind-wheel generator set may specifically include:

determining the running state of the front wind wheel based on the pitch angle and the rotating speed adjusting range of the front wind wheel;

determining the running state of the rear wind wheel based on the pitch angle and the rotating speed adjusting range of the rear wind wheel;

and determining the running state of the whole machine according to different combinations of the running states of the front wind wheel and the rear wind wheel.

Optionally, the method may further include:

generating a front wind wheel running state code based on the running state of the front wind wheel;

generating a rear wind wheel operation state code based on the operation state of the rear wind wheel;

and generating a complete machine running state code based on the front wind wheel running state code and the rear wind wheel running state code.

Optionally, determining a state with the maximum output power among all the complete machine operation states as the optimal complete machine operation state of the current operating point may specifically include:

screening the state with the maximum output power in all the complete machine running states;

and taking the state with the maximum output power in all the complete machine operation states as the optimal complete machine operation state of the current working point.

Optionally, the state with the maximum output power in all the complete machine operation states is screened by an exhaustive traversal mode, a genetic algorithm, a particle swarm algorithm or a support vector machine method.

Optionally, the running state of the double-wind-wheel wind generating set is exhausted according to the traversing sequence of the pitch angle of the front wind wheel, the rotating speed of the front wind wheel, the pitch angle of the rear wind wheel and the rotating speed of the rear wind wheel.

Optionally, dividing the operating point of the dual-wind-wheel wind turbine generator set by using the incoming flow wind speed of the dual-wind-wheel wind turbine generator set may specifically include:

the incoming flow wind speed range of the double-wind-wheel wind generating set is divided into a series of typical value working points according to a certain interval step length.

Optionally, the operating wind speed range is 3m/s to 21m/s, and the operating wind speed range is divided into a plurality of working points at intervals of 0.5 m/s.

Optionally, the method may further include: and generating an operation interval table of the double-wind-wheel wind generating set based on the optimal complete machine operation state of all the working points.

Optionally, the determining the control parameters of the front wind wheel and the rear wind wheel based on the measured incoming flow wind speed and the optimal complete machine operation state table may specifically include:

and obtaining target values of the pitch angle and the rotating speed of the front wind wheel and the rear wind wheel by using the incoming flow wind speed measured by the laser radar wind meter as control input and inquiring the operation interval table.

In the method in fig. 1, the optimal operation state of each wind speed within the operation wind speed range is found by traversing the operation state, and a set of feasible control strategy is formulated to enable the double-wind-wheel wind generating set to always operate in the optimal operation state.

Based on the method of fig. 1, the embodiments of the present specification also provide some specific implementations of the method, which are described below.

Example one

With reference to the definition of aerodynamic power coefficient in a single wind wheel, the aerodynamic power coefficient of a dual wind wheel wind turbine generator set can be expressed as:

wherein, C_PThe pneumatic power coefficient of the double-wind-wheel wind generating set; p_uIs the shaft power of the front wind wheel; p_dIs the shaft power of the rear wind wheel; ρ is the air density; a. the_uIs the front wind wheel rotor area; a. the_dIs the rear wind wheel rotor area; v is the average wind speed through the rotor.

The aerodynamic power coefficient represents the efficiency of the wind wheel for obtaining energy from the incoming flow, and can be adjusted and improved by changing the rotating speed and the pitch angle of the wind wheel during the operation of the wind generating set. The operating state of the wind wheel can be encoded by the rotational speed and the pitch angle as follows:

(ω_rot,β) (2)

wherein, ω is_rotIs the angular velocity of the wind wheel; beta is the pitch angle of the rotor.

The running states of the two wind wheels can be combined into the running state of the whole double-wind-wheel wind generating set, which is as follows:

(ω_rot1,β₁,ω_rot2,β₂) (3)

wherein, ω is_rot1Is the angular velocity of the front wind wheel; beta is a₁Is the pitch angle of the front wind wheel; omega_rot2Is the angular velocity of the rear wind wheel; beta is a₂Is the pitch angle of the rear wind wheel.

After the complete machine running state of the double-wind-wheel wind generating set is coded, a traversal mode needs to be designed according to the sequence shown in the step 2: and exhausting the running state of the double-wind-wheel unit according to the traversing sequence of the pitch angle of the front wind wheel, the rotating speed of the front wind wheel, the pitch angle of the rear wind wheel and the rotating speed of the rear wind wheel.

As shown in FIG. 3, the operating wind speed range in this embodiment is 3m/s to 21m/s, and the operating wind speed range is divided into a plurality of operating points at intervals of 0.5 m/s. And at each working point, taking the running state parameters and the wind speed information as the input of an aerodynamic model (a physical model or a simulation model) of the double-wind turbine set, and recording the aerodynamic power output of the set. And after one group of traversal is finished, outputting the operation state with the maximum output power as a result, and determining the operation state as the optimal operation state at the wind speed. And traversing and optimizing the next working point until the traversal end point is 21m/s, thus obtaining an operation interval table capable of representing the optimal operation state of the double-wind turbine set under the full wind condition.

As shown in fig. 4, the laser radar anemometer is used to monitor the incoming wind speed, and then the incoming wind speed data is transmitted to the complete machine controller. And the complete machine controller inquires a corresponding operation interval table according to the current wind speed to obtain operation interval parameters of the front wind wheel and the rear wind wheel under the current wind speed. And transmitting the operating parameters of the front and rear wind wheels, namely the respective pitch angle set values and the wind wheel rotating speed set values of the front and rear wind wheels to the pitch angle controller and the rotating speed controller of the corresponding wind wheel. The pitch angle controller and the rotating speed controller control corresponding actuators to enable the unit to operate in the optimal operation state.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.