Control system and method for using a continuously variable gearbox in a wind turbine

Abstract

The present invention discloses a control system and method for using a continuously variable speed gearbox in a wind turbine, comprising an integrated controller, a wind speed sensor and a fan blade speed sensor, wherein the wind speed sensor is used to detect wind speed information of a wind field, and the fan blade speed sensor is used to detect speed information of the fan blades; the integrated controller and the wind speed sensor, the fan blade speed sensor, the fan cabin gearbox and the continuously variable speed gearbox, the system and method can improve the power generation capacity of the wind turbine set.

Description

Technical Field

[0001] The invention belongs to the technical field of optimized control of the operation of a wind turbine generator device, and relates to a control system and method for using a continuously variable speed gearbox in a wind turbine generator. Background Art

[0002] Wind is one of the widely distributed renewable energy sources, and it is inexhaustible. In the west of my country, there is a vast Gobi environment, where the wind energy resources are huge and have great development potential. However, as the breadth and depth of my country's development of wind energy resources have been further extended in recent years, the continuous change of wind fields has made it impossible for wind power generation to output electricity as continuously and stably as thermal power generation. In addition, some factors in some areas cannot develop wind power. For example, considering the requirements of environmental protection and safety, the long-term operation of wind turbines will have a certain impact on the local soil, environmental humidity, etc., and long-term operation may damage the local natural ecological environment. In summary, the actual geographical space that can be selected for wind power generation is relatively limited. Therefore, it is particularly important to improve the power generation capacity of a single unit. Summary of the invention

[0003] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide a control system and method for using a continuously variable speed gearbox in a wind turbine, which can improve the power generation capacity of the wind turbine.

[0004] To achieve the above-mentioned purpose, the integrated control system using a continuously variable speed gearbox in a wind turbine described in the present invention includes an integrated controller, a wind speed sensor and a fan blade speed sensor, wherein the wind speed sensor is used to detect the wind speed information of the wind field, and the fan blade speed sensor is used to detect the speed information of the fan blades; the integrated controller and the wind speed sensor, the fan blade speed sensor, the fan cabin gearbox and the continuously variable speed gearbox.

[0005] The wind speed sensor has a wind speed detection range of 1.2m / s to 25m / s.

[0006] The integrated controller is connected to the wind turbine cabin gear box and the continuously variable speed gear box through a first control signal transmission channel.

[0007] The integrated controller is connected to the wind turbine cabin gearbox and the continuously variable speed gearbox via a second control signal transmission channel, and the first control signal transmission channel and the second control signal transmission channel are distributed in parallel.

[0008] The control method of using a continuously variable speed gearbox in a wind turbine according to the present invention comprises the following steps:

[0009] The wind speed information of the wind field is detected by the wind speed sensor, the speed information of the fan blades is detected by the fan blade speed sensor, and the integrated controller determines whether the speed of the fan blades exceeds the set value; when the speed of the fan blades exceeds the preset value, it is first determined whether the fan cabin gearbox is in a locked state. When the fan cabin gearbox is in a locked state, a control command to lock the continuously variable gearbox is output to lock the continuously variable gearbox; when the fan cabin gearbox is in an unlocked state, a control command to lock the fan cabin gearbox and the continuously variable gearbox is output to lock the fan cabin gearbox and the continuously variable gearbox;

[0010] When the speed of the fan blades does not exceed the set value, the optimal output speed of the current fan blades is calculated according to the collected wind speed information, and then it is determined whether the fan cabin gearbox is in a locked state. When the fan cabin gearbox is in a locked state, a control command to open the fan cabin gearbox is output to open the fan cabin gearbox, and at the same time, a control command for adjusting the continuously variable gearbox is generated according to the calculated optimal output speed of the fan blades, so that the output speed of the fan blades is the calculated optimal output speed of the fan blades; when the fan cabin gearbox is in an unlocked state, a control command for adjusting the continuously variable gearbox is generated according to the calculated optimal output speed of the fan blades, and the continuously variable gearbox is controlled thereby, so that the output speed of the fan blades is the calculated optimal output speed of the fan blades.

[0011] The optimal output speed of the current wind turbine blades is calculated using the optimization model based on the collected wind speed information.

[0012] The present invention has the following beneficial effects:

[0013] The control system and method for using a continuously variable speed gearbox in a wind turbine described in the present invention use a five-stage speed change principle during specific operation, so that the fan blades can output electrical energy stably when the wind speed is constantly changing, and the output speed of the fan blades is the calculated optimal output speed of the fan blades, so as to improve the power generation capacity of the wind turbine set, and at the same time increase the protection measures for the fan blades, lock the fan cabin gearbox when the wind speed is too high, avoid damage to the fan blades, and have higher safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention;

[0015] Figure 2 The present invention is a flow chart of the method.

[0016] Among them, 11 is a wind speed sensor, 12 is a fan blade speed sensor, 2 is an integrated controller, 3 is a continuously variable speed gearbox, and 4 is a fan cabin gearbox. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only an embodiment of a part of the present invention, not all embodiments, and is not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concepts disclosed in the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

[0018] The accompanying drawings show schematic diagrams of structures according to embodiments disclosed in the present invention. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0019] refer to Figure 1 The integrated control system for using a continuously variable speed gearbox in a wind turbine according to the present invention comprises an integrated controller 2, a wind speed sensor 11 and a fan blade speed sensor 12, wherein the wind speed sensor 11 is used to detect wind speed information of a wind field, and the fan blade speed sensor 12 is used to detect speed information of fan blades; the integrated controller 2 and the wind speed sensor 11, the fan blade speed sensor 12, the fan nacelle gearbox 4 and the continuously variable speed gearbox 3;

[0020] The wind speed sensor 11 and the fan blade speed sensor 12 both have the ability to detect speeds in a wide range, with the wind speed detection range being 1.2 m / s to 25 m / s; the sensitivity of the sensor can ensure that the wind speed deviation can be accurately detected when it is as low as 0.2 m / s.

[0021] refer to Figure 2 The control method of using a continuously variable gearbox in a wind turbine according to the present invention comprises the following steps:

[0022] The wind speed information of the wind field is detected by the wind speed sensor 11, and the speed information of the fan blades is detected by the fan blade speed sensor 12. The integrated controller 2 determines whether the speed of the blades exceeds the set value; when the speed of the fan blades exceeds the preset value, the protection measures are activated, that is, first determine whether the fan cabin gearbox 4 is in a locked state. When the fan cabin gearbox 4 is in a locked state, a control command to lock the continuously variable gearbox 3 is output to lock the continuously variable gearbox 3; when the fan cabin gearbox 4 is in an unlocked state, a control command to lock the fan cabin gearbox 4 and the continuously variable gearbox 3 is output to lock the fan cabin gearbox 4 and the continuously variable gearbox 3.

[0023] When the rotation speed of the fan blades does not exceed the set value, the optimal output rotation speed of the current fan blades is calculated based on the optimization model according to the collected wind speed information; then it is determined whether the fan cabin gearbox 4 is in a locked state. When the fan cabin gearbox 4 is in a locked state, a control command to open the fan cabin gearbox 4 is output to open the fan cabin gearbox 4, and at the same time, a control command for adjusting the continuously variable gearbox 3 is generated according to the calculated optimal output rotation speed of the fan blades, so that the output rotation speed of the fan blades is the calculated optimal output rotation speed of the fan blades; when the fan cabin gearbox 4 is in an unlocked state, a control command for adjusting the continuously variable gearbox 3 is generated according to the calculated optimal output rotation speed of the fan blades, and the continuously variable gearbox 3 is controlled thereby, so that the output rotation speed of the fan blades is the calculated optimal output rotation speed of the fan blades.

[0024] The above description is only the best specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacement or changes according to the technical solution of the present invention within the technical scope, design concepts and methods disclosed in the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A control method for using a continuously variable gearbox in a wind turbine, characterized in that: The following steps are involved: The wind speed information of the wind field is detected by a wind speed sensor (11), and the speed information of the fan blades is detected by a fan blade speed sensor (12), and the integrated controller (2) determines whether the speed of the fan blades exceeds a set value; when the speed of the fan blades exceeds the preset value, it is first determined whether the fan cabin gearbox (4) is in a locked state; when the fan cabin gearbox (4) is in a locked state, a control command for locking the continuously variable gearbox (3) is output to lock the continuously variable gearbox (3); when the fan cabin gearbox (4) is in an unlocked state, a control command for locking the fan cabin gearbox (4) and the continuously variable gearbox (3) is output to lock the fan cabin gearbox (4) and the continuously variable gearbox (3); When the rotation speed of the fan blades does not exceed the set value, the optimal output rotation speed of the current fan blades is calculated based on the collected wind speed information, and then it is determined whether the fan cabin gearbox (4) is in a locked state. When the fan cabin gearbox (4) is in a locked state, a control command for opening the fan cabin gearbox (4) is output to open the fan cabin gearbox (4), and at the same time, a control command for adjusting the continuously variable gearbox (3) is generated based on the calculated optimal output rotation speed of the fan blades, so that the output rotation speed of the fan blades is the calculated optimal output rotation speed of the fan blades; when the fan cabin gearbox (4) is in an unlocked state, a control command for adjusting the continuously variable gearbox (3) is generated based on the calculated optimal output rotation speed of the fan blades, and the continuously variable gearbox (3) is controlled thereby, so that the output rotation speed of the fan blades is the calculated optimal output rotation speed of the fan blades.

2. The control method of using a continuously variable gearbox in a wind turbine according to claim 1, characterized in that: The optimal output speed of the current wind turbine blades is calculated using the optimization model based on the collected wind speed information.

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