EP-4737713-A1 - WIND TURBINE FOUNDATION, WIND TURBINE GENERATOR SYSTEM AND CONTROL METHOD

EP4737713A1EP 4737713 A1EP4737713 A1EP 4737713A1EP-4737713-A1

Abstract

The present application relates to a wind turbine foundation, a wind turbine generator system and a control method. The wind turbine foundation is capable of being arranged in seawater and configured to support a tower, wherein the wind turbine foundation includes: floating bodies, wherein a number of the floating bodies is n, the floating bodies are arranged at intervals from each other, and lines connecting centers of the floating bodies form a polygon as a whole, where n≥3; connecting bodies, wherein a corresponding one of the connecting bodies is connected between every two adjacent floating bodies; wherein each of the floating bodies has a static chamber and a dynamic chamber that are independently arranged, a first medium is enclosed within the static chamber, each of the floating bodies is provided with a first opening connected to the dynamic chamber and a first control valve, and the first control valve controls opening and closing of the first opening to adjust a volume of the seawater entering the dynamic chamber. According to the wind turbine foundation, wind turbine generator system and control method provided in the embodiments of the present application, the wind turbine foundation has a fast response speed and a good stability effect.

Inventors

ZHAI, Endi
GAO, YANG
XU, ZHILIANG
ZHANG, GUOMING

Assignees

GOLDWIND SCIENCE & TECHNOLOGY CO., LTD.
Beijing Goldwind Science & Creation Windpower Equipment Co. Ltd.

Dates

Publication Date: 20260506
Application Date: 20231220

Claims (17)

A wind turbine foundation, capable of being arranged in seawater and configured to support a tower, wherein the wind turbine foundation comprises: floating bodies, wherein a number of the floating bodies is n, the floating bodies are arranged at intervals from each other, and lines connecting centers of the floating bodies form a polygon as a whole, where n≥3; connecting bodies, wherein a corresponding one of the connecting bodies is connected between every two adjacent floating bodies; wherein each of the floating bodies has a static chamber and a dynamic chamber that are independently arranged, a first medium is enclosed within the static chamber, each of the floating bodies is provided with a first opening connected to the dynamic chamber and a first control valve, and the first control valve controls opening and closing of the first opening to adjust a volume of the seawater entering the dynamic chamber.
The wind turbine foundation according to claim 1, wherein one of the static chamber and the dynamic chamber is arranged around the other.
The wind turbine foundation according to claim 2, wherein one of the dynamic chamber and the static chamber is an annular chamber and the other is a columnar chamber, and the dynamic chamber and the static chamber are arranged coaxially with each other.
The wind turbine foundation according to any one of claims 1 to 3, wherein each of the floating bodies is in a shape of a hollow column as a whole, and the dynamic chamber and the static chamber are arranged alternately in a radial direction of each of the floating bodies.
The wind turbine foundation according to claim 4, wherein each of the floating bodies has two or more dynamic chambers, and the two or more dynamic chambers are all arranged around the static chamber and are independently distributed from each other.
The wind turbine foundation according to any one of claims 1 to 5, wherein the first medium comprises at least one of a solid medium and a liquid medium.
The wind turbine foundation according to any one of claims 1 to 6, further comprising: a compressor and a gas pipe connected to the compressor, wherein the dynamic chamber of each of the floating bodies is connected to the gas pipe.
The wind turbine foundation according to claim 7, wherein a second control valve is arranged between the dynamic chamber and the compressor to adjust a flow rate of gas entering each of the dynamic chamber.
The wind turbine foundation according to any one of claims 1 to 8, further comprising: an inclination angle sensor, arranged on at least one of the floating bodies and the connecting bodies, and configured to acquire an inclination angle, relative to a reference plane, of a whole structure formed by each of the floating bodies and the connecting bodies.
A wind turbine generator system, comprising: the wind turbine foundation according to any one of claims 1 to 9; a wind turbine main body arranged on one of the floating bodies, wherein the wind turbine main body comprises the tower connected to the floating body, a nacelle arranged on the tower, and an impeller arranged on the nacelle.
The wind turbine generator system according to claim 10, further comprising a controller, configured to: acquire current power information of the wind turbine generator system; acquire, under a condition that the current power information continuously exceeds a first threshold for a preset time period, inclination angle information of the wind turbine foundation; determine, under a condition that the inclination angle information exceeds a preset range, a target floating body that needs to be adjusted based on the inclination angle information, a direction of incoming wind, and target posture information corresponding to a target posture to be adjusted to; and adjust a volume of seawater within the target floating body until the wind turbine foundation reaches the target posture.
A control method for a wind turbine generator system according to claim 10 or 11, comprising: acquiring current power information of the wind turbine generator system; acquiring, under a condition that the current power information continuously exceeds a first threshold for a preset time period, inclination angle information of the wind turbine foundation; determining, under a condition that the inclination angle information exceeds a preset range, a target floating body that needs to be adjusted based on the inclination angle information, a direction of incoming wind, and target posture information corresponding to a target posture to be adjusted to; and adjusting a volume of seawater within the target floating body until the wind turbine foundation reaches the target posture.
The control method according to claim 12, wherein the inclination angle information comprises an inclination angle of the wind turbine foundation relative to a preset reference plane; the step of determining, under a condition that the inclination angle information exceeds a preset range, a target floating body that needs to be adjusted based on the inclination angle information, a direction of incoming wind, and target posture information corresponding to a target posture to be adjusted to comprises: determining, under a condition that the inclination angle of the wind turbine foundation relative to the preset reference plane is greater than a second threshold, and an included angle a between the direction of incoming wind and a reference wind direction is in a range of 0°< a ≤180°, at least one of two floating bodies adjacent to the floating body where the tower is located as the target floating body to be adjusted; and determining, under a condition that the inclination angle of the wind turbine foundation relative to the preset reference plane is greater than the second threshold, and the included angle a between the direction of incoming wind and the reference wind direction is 180°< a ≤360°, at least one of the floating body where the tower is located and one of the floating bodies adjacent to the floating body where the tower is located as the target floating body.
The control method according to claim 13, wherein the wind turbine foundation comprises three floating bodies; the step of determining, under a condition that the inclination angle of the wind turbine foundation relative to the preset reference plane is greater than a second threshold, and an included angle a between the direction of incoming wind and a reference wind direction is in a range of 0°< a ≤180°, at least one of two floating bodies adjacent to the floating body where the tower is located as the target floating body to be adjusted comprises: determining, under a condition that the inclination angle of the wind turbine foundation relative to the preset reference plane is greater than the second threshold, and the included angle a between the direction of incoming wind and the reference wind direction is 180°, one of the two floating bodies adjacent to the floating body where the tower is located as the target floating body; determining, under a condition that the inclination angle of the wind turbine foundation relative to the preset reference plane is greater than the second threshold, and the included angle a between the direction of incoming wind and the reference wind direction is in a range of 0°< a <180°, both of the two floating bodies adjacent to the floating body where the tower is located as the target floating bodies.
The control method according to claim 13, wherein the wind turbine foundation comprises three floating bodies; the step of determining, under a condition that the inclination angle of the wind turbine foundation relative to the preset reference plane is greater than the second threshold, and the included angle a between the direction of incoming wind and the reference wind direction is 180°< a ≤360°, at least one of the floating body where the tower is located and one of the floating bodies adjacent to the floating body where the tower is located as the target floating body comprises: determining, under a condition that the inclination angle of the wind turbine foundation relative to the preset reference plane is greater than the second threshold, and the included angle a between the direction of incoming wind and the reference wind direction is 270°, the floating body where the tower is located as the target floating body; determining, under a condition that the inclination angle of the wind turbine foundation relative to the preset reference plane is greater than the second threshold, and the included angle a between the direction of incoming wind and the reference wind direction is 360°, one of the floating bodies adjacent to the floating body where the tower is located as the target floating body; determining, under a condition that the inclination angle of the wind turbine foundation relative to the preset reference plane is greater than the second threshold, and the included angle a between the direction of incoming wind and the reference wind direction is in a range of 180°< a <270° or 270°< a <360°, the floating body where the tower is located and one of the floating bodies adjacent to the floating body where the tower is located as the target floating bodies.
The control method according to claim 12, wherein the adjusting the volume of seawater within the target floating body comprises: pressing the seawater into the target floating body through the first opening and discharging the seawater into a sea area to adjust an overall displacement of the wind turbine foundation.
The control method according to claim 12, wherein after the step of adjusting a volume of seawater within the target floating body until the wind turbine foundation reaches the target posture, the control method further comprises: acquiring current power information of the wind turbine generator system; adjusting, under a condition that the current power information is continuously less than the first threshold for a preset time period, the volume of seawater within the target floating body to restore to an initial state.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to Chinese Patent Application No. 202310816270.9 filed on June 29, 2023, which is hereby incorporated by reference in its entirety. TECHNICAL FIELD The present application relates to the technical field of wind power, and in particular to a wind turbine foundation, a wind turbine generator system and a control method. BACKGROUND The wind power industry continues to contribute to the achievement of dual-carbon goals. Currently, wind turbine generator systems are developing toward larger single-unit capacity, lighter overall weight, intelligentization, and offshore applications. According to statistics, the cumulative installed capacity of offshore wind power is increasing year by year. With the large-scale development of nearshore resources, the development and utilization of deep-sea resources have attracted significant attention. Within this industry scenario, floating-type wind turbine generator systems are gradually being developed and will become a major contributor to the subsequent development of offshore wind power. A wind turbine foundation is used to support components, such as a tower, a nacelle etc., of a floating-type wind turbine generator system. When the wind turbine generator system faces wind loads, wave loads, ocean current loads, ice loads, etc., from the perspective of overall dynamics, the wind turbine foundation has six degrees of freedom in all directions, due to the "floating" characteristics of the floating-type wind turbine generator system. Under intertwined coupling of external load randomness and the complexity of the wind turbine generator system's own motion, the overall non-linear characteristics of the floating-type wind turbine generator system become more complex. The motion stability of the floating-type wind turbine generator system is one of the most important indicators to ensure continuous, stable, safe and efficient output of the wind turbine generator system and to ensure power generation. Therefore, how to ensure the stability of the floating-type wind turbine generator system is one of the problems that need to be urgently solved in the wind power field. The wind turbine foundation in related art mainly adjusts an overall inclination angle of the wind turbine foundation by controlling mutual flow of fluids between different floating bodies, so as to ensure the stability of the floating-type wind turbine generator system where the wind turbine foundation is located. However, this design method makes an overall displacement of the wind turbine foundation unchanged, resulting in slow response speed and poor stability effect. SUMMARY Embodiments of the present application provide a wind turbine foundation, a wind turbine generator system and a control method. The wind turbine foundation has a fast response speed and a good stability effect. In one aspect, embodiments of the present application provide a wind turbine foundation, capable of being arranged in seawater and configured to support a tower, wherein the wind turbine foundation includes: floating bodies, wherein a number of the floating bodies is n, the floating bodies are arranged at intervals from each other, and lines connecting centers of the floating bodies form a polygon as a whole, where n≥3; connecting bodies, wherein a corresponding one of the connecting bodies is connected between every two adjacent floating bodies; wherein each of the floating bodies has a static chamber and a dynamic chamber that are independently arranged, a first medium is enclosed within the static chamber, each of the floating bodies is provided with a first opening connected to the dynamic chamber and a first control valve, and the first control valve controls opening and closing of the first opening to adjust a volume of the seawater entering the dynamic chamber. In another aspect, embodiments of the present application provide a wind turbine generator system, including: the wind turbine foundation described above; a wind turbine main body arranged on one of the floating bodies, wherein the wind turbine main body includes the tower connected to the floating body, a nacelle arranged on the tower, and an impeller arranged on the nacelle. In yet another aspect, embodiments of the present application provide a control method for the wind turbine generator system described above, including: acquiring current power information of the wind turbine generator system; acquiring, under a condition that the current power information continuously exceeds a first threshold for a preset time period, inclination angle information of the wind turbine foundation; determining, under a condition that the inclination angle information exceeds a preset range, a target floating body that needs to be adjusted based on the inclination angle information, a direction of incoming wind, and target posture information corresponding to a target posture to be adjusted to; and adjusting