A wind turbine blade damage sensing system

Abstract

This invention provides a wind turbine blade damage sensing system, including a sensing line, a sensing control loop, a sensing relay, and a blade control PLC system. The sensing line is tightly bonded along the inner edge of the blade to form a closed loop. The control loop is connected to the pitch DC 24V power supply via a 1P circuit breaker and then connected to the relay coil via the sensing line. The two sets of normally open contacts of the relay are connected in parallel between the PLC input module and the power supply. If the sensing line breaks, the sensing line breaks synchronously, causing the relay to lose power, the contacts to open, the input module to switch to a low level, and triggering the PLC system to send alarm and fault information to the main control system. This invention solves the technical blind spot of the prior art where blade damage cannot be detected in a timely manner. Through simple and reliable electrical connections and logic design, it realizes real-time monitoring and signal transmission of blade damage, avoids secondary accidents caused by blindly resetting the wind turbine, and significantly improves the safety and reliability of wind turbine operation.

Description

Technical Field

[0001] This utility model relates to the field of blade damage sensing technology, and more specifically, to a wind turbine blade damage sensing system. Background Technology

[0002] In the field of wind power generation, the wind turbine is one of the core components of a wind turbine generator set, and the safe operation of its blades directly affects the reliability and economy of the unit. Taking the applicant's Shiniuling Wind Farm as an example, there are currently 50 Goldwind direct-drive wind turbine generator sets (110MW), including three models: GW115-2100, GW115-2200, and GW140-3000, with blade lengths of 56 meters and 68 meters, respectively. When blades break due to excessive deformation during operation, if it is not detected and measures are not taken in time, it may lead to major equipment damage accidents and economic losses. However, existing wind turbine generator sets generally lack a dedicated sensing system for blade breakage, which presents the following technical problems:

[0003] 1. When the blades are excessively deformed or broken, the system cannot detect the problem in time and transmit the signal to the main control system.

[0004] 2. Remote monitoring personnel cannot obtain fault information immediately, making it difficult to take timely emergency measures;

[0005] 3. Blindly resetting the fan may lead to a more serious accident. Utility Model Content

[0006] Based on the above-mentioned technical problems, this utility model proposes a wind turbine blade damage sensing system.

[0007] A wind turbine blade damage sensing system includes a blade damage sensing line, a blade damage sensing control loop, a blade damage sensing relay K10, and a blade control PLC system. Specifically:

[0008] Blade breakage sensing line: 4-6mm² copper core multi-strand soft copper wire is arranged into a closed loop along the inner edge of the blade to sense the structural integrity of the blade in real time;

[0009] Control circuit connection: Add a dedicated sensing control circuit to the pitch DC24V control circuit. Connect the circuit to the spare bay of the DC24V power supply terminal block via switch F01. Connect the output of the switch to the positive terminal of the sensing line. Connect the negative terminal of the sensing line to the A1 terminal of the relay K10 coil and the A2 terminal to the DC0V terminal block.

[0010] PLC System Integration: An input module is added to the blade control PLC system. This module is connected to a DC24V power supply through two sets of parallel normally open contacts of relay K10. During normal operation, the sensing line is closed, the relay coil is energized, the normally open contacts are energized, and the input module receives a high level. When the blade is damaged, the sensing line breaks, the relay is de-energized, the contacts open, the input module switches to a low level, and the PLC system sends alarm and fault information to the main control system.

[0011] Beneficial effects:

[0012] 1. Real-time sensing: Through sensing lines arranged inside the blades, the changes in circuit continuity caused by blade damage are monitored in real time to ensure that fault signals are fed back immediately;

[0013] 2. Dual protection: The relay has two sets of normally open contacts connected in parallel, which reduces the risk of false alarms caused by loose wiring and improves system reliability;

[0014] 3. Safety protection: To prevent remote personnel from blindly resetting the fan, providing accurate information for emergency response and reducing equipment damage and economic losses. Attached Figure Description

[0015] Figure 1 A schematic diagram of the blade breakage sensing line layout is shown;

[0016] Figure 2 A schematic diagram of the blade breakage sensing and control loop is shown.

[0017] In the attached diagram, 1 represents the blade, and 2 represents the sensing line. Detailed Implementation

[0018] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0019] like Figures 1-2 The wind turbine blade damage sensing system shown includes a sensing line, a sensing control loop, a sensing relay K10, and a blade control PLC system.

[0020] Sensor wire installation: 4-6mm² copper core multi-strand soft copper wire is tightly bonded and arranged along the inner edge of the blade to form a closed loop, ensuring synchronous deformation with the blade and preventing the wire from loosening.

[0021] Control circuit setup: Select a spare interval on the power supply terminal block of the pitch DC24V control circuit, connect switch F01, and connect its output to the positive terminal of the sensing line; connect the negative terminal of the sensing line to terminal A1 of relay K10 coil, and terminal A2 to the DC0V terminal block to complete the relay power supply circuit.

[0022] PLC system configuration: Add a dedicated input module to the blade control PLC system. Connect the two normally open contacts of relay K10 in parallel, connect one end to a DC24V power supply, and connect the other end to the input module to form a high-level input circuit.

[0023] Operating logic: When the blade is normal, the sensing line is conductive, the relay is energized, the contacts are closed, and the input module remains at a high level; when the blade is damaged and the sensing line breaks, the relay is de-energized, the contacts are opened, the input module goes low, the PLC system immediately sends a fault signal to the main control system, and the remote monitoring personnel take emergency shutdown and other measures accordingly.

[0024] In summary, this invention fills the blind spot in blade damage detection in the prior art through simple and reliable hardware connection and logic design, and significantly improves the safety monitoring capability of wind turbine generator sets.

[0025] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A wind turbine blade breakage sensing system, characterized in that, include: Sensing lines, sensing control loops, sensing relays, and blade control PLC systems; The sensing lines are arranged in a closed loop along the inner edge of the blade to sense blade breakage; The sensing control circuit is connected to the pitch DC24V control circuit and includes a switch F01. The input terminal of the switch F01 is connected to the DC24V power supply terminal block, and the output terminal is connected to the positive terminal of the sensing line. The coil A1 terminal of the sensing relay K10 is connected to the negative terminal of the sensing line, and the coil A2 terminal is connected to the DC0V terminal block. The blade control PLC system is equipped with an input module for sensing, which is connected to a DC24V power supply through two sets of normally open contacts of the sensing relay K10.

2. The wind turbine blade breakage sensing system according to claim 1, characterized in that, The sensing line is a 4-6mm² copper core multi-strand soft copper wire.

3. The wind turbine blade breakage sensing system according to claim 1, characterized in that, The sensing line is tightly bonded to the inner wall of the blade.

4. The wind turbine blade breakage sensing system according to claim 1, characterized in that, The two normally open contacts of the sensing relay K10 are connected in parallel between the input module and the DC24V power supply.

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