Wind turbine generator overspeed protection device based on gyroscope

Abstract

The utility model particularly relates to a wind turbine generator overspeed protection device based on a gyroscope, which is mounted in a hub of a wind turbine generator and comprises a device shell, the gyroscope, a PLC (Programmable Logic Controller) and a relay, the gyroscope, the PLC and the relay are all mounted in the device shell; the gyroscope and the relay are connected with the PLC; the relay is connected with a fan safety link; the PLC is in Ethernet communication signal connection with an external server; the wind turbine generator hub control system is simple in overall structure and low in improvement cost, the rotating speed state of an independent fan impeller is monitored by improving and optimizing the wind turbine generator hub, a variable-pitch safety chain signal is triggered through the rotating speed according to a result, feathering shutdown is achieved, and in an extreme unforeseen circumstances, the wind turbine generator hub control system is safe and reliable. It can be ensured that the working state is not affected by other factors of the wind turbine generator, and the overall operation stability of the wind turbine generator is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbine auxiliary equipment, in particular to a gyroscope-based wind turbine overspeed protection device. Background Art

[0002] Generally, wind turbines are equipped with encoder-based overspeed protection devices. However, due to the influence of circuit electromagnetic interference, there is a possibility of encoder damage or failure, which poses a certain safety hazard to the wind turbine. Therefore, a localized wind turbine safety link control device is needed to reduce safety hazards. Utility Model Content

[0003] The utility model aims to provide a gyroscope-based wind turbine overspeed protection device to solve the above technical problems.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0005] A gyroscope-based wind turbine overspeed protection device, installed in the hub of the wind turbine, includes a device housing, a gyroscope, a PLC controller and a relay;

[0006] The gyroscope, PLC controller and relay are all installed in the device housing; the gyroscope and relay are connected to the PLC controller; the relay is connected to the wind turbine safety link; the PLC controller is connected to the external server Ethernet communication signal;

[0007] Furthermore, the Z-axis installation direction of the gyroscope is parallel to the main axis;

[0008] Further, the relay is connected in series with the wind turbine safety link;

[0009] Furthermore, a battery pack is also provided in the housing of the device, the battery pack is connected to the PLC and supplies power to the gyroscope, the PLC controller and the relay;

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] The utility model has a simple overall structure and low modification cost. By improving and optimizing the hub of the wind turbine set, the speed status of the independent wind turbine impeller can be monitored, and the speed can be used to trigger the variable pitch safety chain signal through the result, thereby achieving feathering shutdown. In addition, in extreme unexpected situations, it can ensure that the working state is not affected by other factors of the wind turbine set, thereby improving the overall operation stability of the wind turbine set. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0014] refer to Figure 1 As shown, a gyroscope-based wind turbine overspeed protection device is installed in a wind turbine hub 5, including a device housing 4, a gyroscope 1, a PLC controller 2 and a relay 3;

[0015] The gyroscope 1, PLC controller 2 and relay 3 are all installed in the device housing 4; the gyroscope 1 and relay 3 are connected to the PLC controller 2; the relay 3 is connected to the wind turbine safety link; the PLC controller is connected to the external server Ethernet communication signal;

[0016] Furthermore, the Z-axis installation direction of the gyroscope 1 is parallel to the axis of the main shaft 6;

[0017] Further, the relay 3 is connected in series with the wind turbine safety link;

[0018] Furthermore, a battery pack is also provided in the device housing 4, and the battery pack is connected to the PLC and supplies power to the gyroscope 1, the PLC controller 2 and the relay 3;

[0019] In this embodiment, the Z-axis direction of the gyroscope 1 is installed parallel to the axial direction of the main shaft 6, and serves as a data acquisition subject to obtain the rotation speed of the fan blades; the gyroscope 1 measures and obtains the angular velocity of the XYZ three phases; the rotation speed data is transmitted to the PLC controller 2, and the PLC controller determines whether the rotation speed exceeds or approaches a preset threshold;

[0020] Based on the judgment, the PLC controller 2 sends a control instruction to the relay 3, and the state of the controller 3 further affects the state of the wind turbine safety link;

[0021] The fan safety link is a safety signal chain for the fan, which can control the fan shutdown procedure;

[0022] Combined with a battery pack, it can achieve local processing capabilities in extreme situations. Even if the wind turbine system itself fails, the battery pack can provide local power supply, achieve real-time monitoring of the working status of the wind blade speed, and transmit the status information to the external wind farm central control server via Ethernet signal communication through PLC.

[0023] The utility model has a simple overall structure and low modification cost. By improving and optimizing the hub of the wind turbine set, the speed status of the independent wind turbine impeller can be monitored, and the speed can be used to trigger the variable pitch safety chain signal through the result, thereby achieving feathering shutdown. In addition, in extreme unexpected situations, it can ensure that the working state is not affected by other factors of the wind turbine set, thereby improving the overall operation stability of the wind turbine set.

[0024] The specific embodiments described herein are merely examples of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the scope defined by the spirit of the present invention.

Claims

1. A gyroscope-based wind turbine overspeed protection device, installed in a wind turbine hub (5), characterized in that: It comprises a device housing (4), a gyroscope (1), a PLC controller (2) and a relay (3); The gyroscope (1), PLC controller (2) and relay (3) are all installed in a device housing (4); the gyroscope (1) and relay (3) are both connected to the PLC controller (2); the relay (3) is connected to a wind turbine safety link; and the PLC controller is connected to an external server Ethernet communication signal.

2. A gyroscope-based wind turbine overspeed protection device according to claim 1, characterized in that: The Z-axis installation direction of the gyroscope (1) is parallel to the axis of the main shaft (6).

3. A gyroscope-based wind turbine overspeed protection device according to claim 1, characterized in that: The relay (3) is connected in series with the wind turbine safety link.

4. A gyroscope-based wind turbine overspeed protection device according to claim 3, characterized in that: A battery pack is also arranged in the device housing (4); the battery pack is connected to the PLC and supplies power to the gyroscope (1), the PLC controller (2) and the relay (3).

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