阅读说明：本技术 大型多叶轮风电系统的布局方式 (Layout mode of large-scale multi-impeller wind power system ) 是由 崔逸南 崔新维 于 2020-05-13 设计创作，主要内容包括：本发明公开了一种大型多叶轮风电系统的布局方式,多叶轮风力发电系统是将多行小机组安装在同一个支撑结构中实现风能到电能转换的系统。多叶轮风力发电系统中小机组个数不少于五个,小机组的行数不少于两行,相邻行的小机组个数仅相差一个,这样能降低系统支撑结构的尺寸和制造成本,保证系统总成本最优,使得大型多叶轮风电系统的经济性在与传统单一叶轮机组的对比中占有优势。(The invention discloses a layout mode of a large-scale multi-impeller wind power system, and the multi-impeller wind power system is a system for realizing conversion from wind energy to electric energy by mounting a plurality of rows of small units in the same supporting structure. The number of the small units in the multi-impeller wind power generation system is not less than five, the number of the rows of the small units is not less than two, and the number of the small units in adjacent rows is only different by one, so that the size and the manufacturing cost of the system supporting structure can be reduced, the total cost of the system is ensured to be optimal, and the economy of the large multi-impeller wind power generation system is superior to that of the traditional single impeller unit.)

1. The small units (2) are arranged on a supporting structure (1) of the multi-impeller wind power generation system, and the number of the small units (2) owned by the multi-impeller wind power generation system is not less than five.

2. A wind power system according to claim 1, having at least two rows of small assemblies (2), and the number of small assemblies (2) in any row should be no less than two.

3. The description according to claim 2, the number of subgroups (2) of any row (4) being different from the number of subgroups (2) of its adjacent row (5) by one.

4. The number of the small unit (2) in any row (4) can be one more or one less than that of the impellers in the adjacent row (5).

5. The description in claim 3, the array of rows of small assemblies (2) and the support structure (1) of the multi-bladed wind power system being symmetrical with respect to the yaw axis of rotation (6) of the system.

Technical Field

The invention belongs to the technical field of wind power generation, and relates to a layout mode applied to a large-scale multi-impeller wind power generation system.

Background

A multi-impeller wind power generation system is a system for realizing conversion from wind energy to electric energy by mounting a plurality of rows of small units in the same supporting structure. Compared with a traditional wind turbine with a single impeller, the multi-impeller wind power generation system does not need to use ultra-long and ultra-heavy blades, avoids the occurrence of ultra-large torque, and provides another feasible way for the large-scale offshore wind turbine and the reduction of the development cost of the turbine.

The key components affecting the manufacturing cost of a multi-impeller wind power generation system are the selection of small unit configuration (number and length of blades) and the design of a support structure brought by impeller layout. An unreasonable layout would lead to a costly system configuration; the use amount of raw materials is increased undoubtedly due to the ultra-wide and ultra-high support structure, so that the manufacturing cost advantage of the multi-impeller wind power generation system is directly reduced, and the possibility that investors and developers select to use the multi-impeller wind power generation system is reduced. Therefore, the multi-impeller wind power generation system needs a reasonable layout mode, and the cost of a small unit and a supporting structure is reduced on the premise of ensuring that the power generation capacity is the same as that of a single-impeller wind power generation unit.

CN 205533018U, CN 107407259 a, CN 102322399 a, CN 102305186A, CN 102269113A, CN 102269111 a, CN 102305171 a, CN 102305172A, CN 102305185A and CN 102322397A all propose forms of multiple-bladed wind generators. These patents do not address the issue of how to reduce the cost of manufacturing the system by a reasonable overall impeller layout.

CN 210049986U proposes a multi-impeller structure to realize multi-level wind energy utilization. The system layout mode of the invention is single, and the obvious adjustment of the manufacturing cost can not be realized by adjusting the system layout mode.

CN 108368821 a, CN 109219701 a, CN 110691905A, and CN 107429661 a all propose that a wind power plant comprises a plurality of wind turbine systems arranged in rows and columns. None of these inventions addresses the problem of system layout to reduce manufacturing costs and the impeller placement methods used in these inventions can be further optimized.

Disclosure of Invention

A reasonable layout mode is needed for a large-scale multi-impeller wind power generation system, and on the premise that the power generation capacity is equivalent to that of a single-impeller wind power generation unit, the design of a supporting structure is optimized by establishing an optimized small unit layout mode, so that the manufacturing cost of the system is reduced.

The technical scheme of the layout mode suitable for the large-scale multi-impeller wind power generation system is as follows:

and the yaw mechanism of the multi-impeller wind power generation system drives the support structure of the system and all small units fixed on the support structure to perform integral yaw wind alignment.

And when the wind power generation system is in a yaw initial state, the control device adjusts the impeller rotating speeds of a plurality of small units on one side of a yaw rotating axis according to the requirement of a yaw direction, and the limitation of the impeller rotating speeds of other small units in the multi-impeller wind power generation system is kept unchanged.

The small units (2) are arranged on a supporting structure (1) of the multi-impeller wind power generation system, and the number of the small units (2) owned by the multi-impeller wind power generation system is not less than five. The multi-impeller wind power generation system is provided with at least two rows of small blade units (2), and the number of the small blade units (2) in any row is not less than two.

The number of the small units (2) in any row (4) is different from that of the small units (2) in the adjacent row (5) by one. The number of the small unit (2) in any row (4) can be one more or one less than that of the impellers in the adjacent row (5).

The array formed by the rows of small units (2) and the supporting structure (1) of the multi-impeller wind power generation system are symmetrical about a yaw rotation axis (6) of the system.

The invention has the beneficial effects that: the invention provides a system layout mode for a multi-impeller wind power generation system. The reasonable number of the small unit rows and the number of the small units in each row are configured, so that the size of the supporting structure is optimized to reduce the manufacturing cost of the system, the purpose of reducing the unit cost is achieved, and the realizability of engineering is also increased.

Drawings

Specific embodiments will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a front view 1 of a small assembly and support structure of a multiple-bladed wind power system;

fig. 2 is a front view 2 of a small assembly and support structure of a multi-bladed wind power system.

In the figure, 1-support structure, 2-small units, 3-blades, 4-small units in a row, 5-small units in an adjacent row, and 6-yaw rotation axis.

Detailed Description

The drawings are intended to depict only typical features of the invention, and are not intended to show any actual structure or detail herein, including dimensions, relative proportions, etc., of the various elements. In order to more clearly illustrate the principles of the present invention and to avoid obscuring the same in unnecessary detail, the examples in the drawings have been simplified. These illustrations do not present an inconvenience to those skilled in the relevant art (wind power generation) in understanding the present invention, and an actual multiple-bladed wind power generation system may include more components.

The invention adopts the following specific implementation scheme:

as shown in fig. 1, the multi-bladed wind power system should have at least two rows of blades, and if there is only one row of blades, the support structure is very wide, which increases the cost, and the load to be overcome during yawing becomes very large, which increases the engineering difficulty.

As shown in fig. 2, the support structure (1) of the multi-bladed wind power system is symmetrical about the system yaw axis of rotation (6). If there is no such symmetry, the problem of uneven loading will occur in the multi-bladed wind power generation system. This is a phenomenon that needs to be avoided during normal operation of the system, in particular when performing yawing movements.

The number of the small units (2) in any row (4) is different from that of the small units (2) in the adjacent row (5) by only one. The number of the small unit (2) in any row (4) can be one more or one less than that of the small unit (2) in the adjacent row (5). On the premise that the number of small units (2) of the multi-impeller wind power generation system is unchanged and the support structure (1) is symmetrical about a yaw rotation axis (6) of the system, if the number of the small units (2) in any row (4) is the same as that of the small units (2) in the adjacent row (5), the distance between the two rows needs to be large enough to avoid interference of the blades (3), which is contrary to the aim of reducing the height (reducing the cost) of the support structure (1). If the number of the small units (2) in any row (4) is different from the number of the impellers in the adjacent row (5) by more than one (for example, two), the width or the height of the supporting structure (1) is increased. According to the multiple layout principles, the number of the small units (2) in each row is at least two.