A kind of wind fan yaw power regulating system

Abstract

This utility model discloses a wind turbine yaw power regulation system, belonging to the field of wind power generation technology. The system includes a tower, nacelle, adaptive wind-concentrating shroud, slewing bearing, yaw motor, wind speed sensor, power sensor, and controller. The sensor is connected to the controller, and the controller is connected to the yaw motor. The system has two operating states: at low wind speeds, the yaw motor is in low-power standby mode, and the wind-concentrating shroud adaptively adjusts to the wind; at high wind speeds, the controller activates the yaw motor and adjusts its rotation according to the power feedback signal to change the yaw angle of the nacelle, thereby realizing closed-loop power control. This utility model expands the original yaw system into a power regulation mechanism, with a reasonable structure, fast adjustment response, and high operating economy.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, specifically to a power regulation system for a wind turbine with a wind-concentrating shroud. Background Technology

[0002] Currently, to improve wind energy utilization, an adaptive wind-gathering shroud has been added to the front of the wind turbine nacelle. This shroud can adaptively yaw to align with the wind at low wind speeds, thus enhancing wind concentration efficiency. However, under high wind speed (exceeding the rated wind speed) conditions, the power regulation of such turbines still relies entirely on traditional pitch mechanisms or mechanical braking systems. Pitch adjustment mechanisms are complex, have slow response times, and are costly to maintain; mechanical braking is a passive power-limiting method, which generates mechanical losses and reduces power generation efficiency. Meanwhile, the yaw system (mainly composed of a yaw motor and slewing bearing) that is standard on the turbine and used for nacelle alignment is idle during high wind speed power regulation, only remaining powered on in standby mode, resulting in wasted equipment resources. In existing technologies, the yaw system has not been effectively utilized for efficient power regulation of wind turbines with wind-gathering shrouds. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of the existing technology by providing a wind-gathering turbine yaw power regulation system. This system, through innovative hardware structure and working mode design, activates and utilizes the yaw motor for active power regulation under high wind speed conditions, thereby reducing reliance on traditional pitch mechanisms and mechanical brakes and achieving more precise, efficient, and low-loss power control.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a wind-concentrating wind turbine yaw power regulation system, including a tower, a nacelle located at the top of the tower, and an adaptive wind-concentrating shroud located at the front end of the nacelle. The system also includes a slewing bearing, a yaw motor, a wind speed sensor, a power sensor, and a controller.

[0005] The slewing bearing is installed between the lower part of the nacelle and the top of the tower.

[0006] The output end of the yaw motor is connected to the slewing bearing via a transmission.

[0007] The wind speed sensor is mounted on the nacelle.

[0008] The power sensor is located at the power output end of the wind turbine.

[0009] The signal output terminals of the wind speed sensor and the power sensor are respectively connected to the corresponding input terminals of the controller, and the control output terminal of the controller is connected to the yaw motor.

[0010] The system is configured to have two operating states: The first working state corresponds to a wind speed less than or equal to a preset rated wind speed; in this state, the controller controls the yaw motor to be in a low-power standby state, and the adaptive wind-gathering cover is used for adaptive yaw against the wind.

[0011] The second operating state corresponds to a wind speed greater than the rated wind speed. In this state, the controller controls the yaw motor to start and adjusts the rotation of the yaw motor according to the power signal fed back by the power sensor to change the yaw angle of the cabin, thereby adjusting the output power.

[0012] Furthermore, when the yaw motor is in low-power standby mode, its excitation coil is in a half-energized state.

[0013] Furthermore, the controller is also connected to an angle sensor for detecting the yaw angle of the cabin.

[0014] Furthermore, the controller is communicatively connected to the main control system of the wind turbine.

[0015] Furthermore, the yaw motor has a built-in overload protection unit.

[0016] The working principle of this invention is as follows: the system switches between a first working state and a second working state based on real-time wind speed. In the first working state (low wind speed), the yaw motor operates at low power consumption, relying on the adaptive characteristics of the wind-gathering shroud to achieve efficient wind control and energy concentration. In the second working state (high wind speed), the system converts the yaw motor into a power-regulating actuator, adjusting its rotation according to the power feedback signal through a controller, thereby precisely controlling the yaw angle of the nacelle. This angle change causes a controllable offset between the wind turbine axis and the wind direction, regulating the input wind energy from the aerodynamic source to achieve rapid and stable power control.

[0017] Compared with existing technologies, this invention offers the following advantages: It achieves aerodynamic source adjustment via yaw at high wind speeds, resulting in fast response and high control precision, while reducing reliance on and wear of pitch control mechanisms and mechanical brakes. It fully utilizes the existing yaw system's hardware capabilities, extending its application to power regulation and improving equipment functionality. The low-power standby design of the yaw motor reduces operating energy consumption. This invention fully preserves the adaptive wind-gathering advantage of the wind-gathering shroud at low wind speeds, without affecting its original wind energy capture efficiency. Furthermore, the system features overload protection and redundant communication mechanisms with the main control system, ensuring operational stability and fault response capabilities. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a partially enlarged structural diagram of the top of the tower in this utility model.

[0021] Figure 3 This is a top view of the structure of this utility model.

[0022] In the diagram: 1 is the slewing bearing, 2 is the yaw motor, 3 is the controller, 4 is the wind speed sensor, 5 is the power sensor, 6 is the adaptive wind shroud, 7 is the nacelle, and 8 is the tower. Detailed Implementation

[0023] The present invention will be further described below with reference to specific embodiments.

[0024] like Figure 1 , Figure 2 and Figure 3 As shown, the embodiment of this utility model is as follows: A nacelle 7 is mounted on the top of the tower 8 via a slewing bearing 1. A yaw motor 2 is fixed to the base of the nacelle 7, and its output gear meshes with the large gear ring of the slewing bearing 1. An adaptive wind-gathering shroud 6 is mounted on the front end of the nacelle 7. A wind speed sensor 4 is mounted on the top of the nacelle 7. A power sensor 5 is installed in the power output circuit of the generator. A controller 3 is installed in the electrical control cabinet inside the nacelle 7. Its input terminals are connected to the wind speed sensor 4 and the power sensor 5 via cables, and its control output terminal is connected to the drive unit of the yaw motor 2. The controller 3 also establishes a communication connection with the main control system of the wind turbine.

[0025] The working process of this utility model is as follows: The controller 3 continuously receives wind speed data from the wind speed sensor 4. When the wind speed is less than or equal to the preset rated wind speed, the system is in its first operating state. The controller 3 controls the yaw motor 2 to enter a low-power standby state with the excitation coil partially energized, and the wind turbine relies on the adaptive wind concentrator 6 to achieve efficient wind energy concentration.

[0026] When the wind speed exceeds the rated wind speed, the system switches to the second operating state. Controller 3 immediately activates the yaw motor 2 to its rated operating state and begins reading the real-time output power fed back by the power sensor 5. Based on the deviation between the real-time power and the rated power, controller 3 generates a control signal to drive the yaw motor 2 to rotate. If the power exceeds the limit, the nacelle 7 is controlled to rotate in the direction of increasing the windward angle; if the power is insufficient, the nacelle 7 is controlled to rotate in the direction of decreasing the windward angle. Through continuous adjustment, the output power is stabilized near the rated value.

[0027] To ensure safety, the overload protection unit built into the yaw motor 2 will cut off power in case of abnormal torque. If a system malfunctions, the controller 3 will notify the wind turbine main control system via the communication link to switch to the standby power regulation mode executed by the pitch mechanism.

[0028] This invention innovatively applies a yaw system to high wind speed power regulation through specific hardware connection relationships and a structural design for two working states. It is particularly suitable for wind turbines with wind-concentrating shrouds and has significant practical value.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A wind-concentrating wind turbine yaw power regulation system, comprising a tower (8), a nacelle (7) mounted on top of the tower (8), and an adaptive wind-concentrating shroud (6) disposed at the front end of the nacelle (7), characterized in that, Also includes: Slewing bearing (1) is installed between the lower part of the nacelle (7) and the top of the tower (8); The yaw motor (2) is connected to the slewing bearing (1) for driving the engine room (7) to rotate. Wind speed sensor (4) is installed on the nacelle (7); A power sensor (5) is installed at the power generation output end of the wind turbine; Controller (3); The signal output terminals of the wind speed sensor (4) and the power sensor (5) are respectively connected to the corresponding input terminals of the controller (3), and the control output terminal of the controller (3) is connected to the yaw motor (2). The system has two operating states: When the wind speed is less than or equal to the preset rated wind speed, the controller (3) controls the yaw motor (2) to be in a low-power standby state, and the adaptive wind-gathering cover (6) is used for adaptive yaw against the wind. When the wind speed is greater than the rated wind speed, the controller (3) controls the yaw motor (2) to start, and adjusts the rotation of the yaw motor (2) to change the yaw angle of the cabin (7) according to the power signal fed back by the power sensor (5).

2. The wind-concentrating fan yaw power regulation system according to claim 1, characterized in that, When the yaw motor (2) is in low-power standby mode, its excitation coil is in a half-energized state.

3. The yaw power regulation system for a wind-concentrating fan according to claim 1, characterized in that, The controller (3) is also connected to an angle sensor for detecting the yaw angle of the cabin (7).

4. The yaw power regulation system for a wind-concentrating fan according to claim 1, characterized in that, The controller (3) is communicatively connected to the main control system of the wind turbine.

5. The yaw power regulation system for a wind-concentrating fan according to claim 1, characterized in that, The yaw motor (2) has a built-in overload protection unit.

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