A monitoring signal collection device of a wind turbine anti-freezing disaster system

Abstract

The utility model relates to a kind of monitoring signal acquisition device of wind turbine anti-freezing disaster system, for the blade heating medium working condition monitoring of large capacity wind turbine under high humidity low temperature environment.The device can realize the distributed acquisition, centralized management and transmission of 9-way signals in three blades, wherein each blade has 2-way temperature signals and 1-way pressure signals.Through the synergistic effect of programmable controller (PLC) and industrial switch, the collected signals are converted and transmitted centrally, which simplifies the system structure, reduces the number of equipment, improves the system operation reliability, and ensures the stable operation of wind turbine in freezing weather environment.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, specifically a monitoring signal acquisition device for wind turbine anti-freezing disaster system, which is suitable for monitoring the operating conditions of blade heating medium in high humidity and low temperature environments of large-capacity wind turbines (5MW and above). Background Technology

[0002] In high-humidity and low-temperature environments, wind turbines face severe freezing disasters, especially in the Yunnan-Guizhou Plateau region of Southwest China. This has become one of the main factors affecting the annual equivalent utilization hours and economic benefits of wind energy resource development. Active gas-thermal technology, due to its advantages such as convenient system maintenance and no increase in the risk of lightning strikes, has gradually become an effective method for solving the problem of freezing disasters in mountainous wind farms.

[0003] In the prior art, utility model patent with publication number CN218407680U relates to this technology, and the device disclosed therein is generally similar to conventional devices currently on the market. The main structure includes: a stress sensor, a first data acquisition unit, an anemometer, a wind vane, a second data acquisition unit, and an industrial control computer. The first data acquisition unit is electrically connected to the stress sensor, the second data acquisition unit is electrically connected to both the anemometer and the wind vane, and the industrial control computer is connected to both the first and second data acquisition units.

[0004] However, existing technologies still have some problems. As wind turbines develop towards larger capacity and lower wind speeds, the mainstream turbine models for mountain wind energy resource development have increased from 2MW to 5MW and above. However, field tests show that the active gas-thermal method technology, which works well on 2MW wind turbines, has significant defects on 5MW turbines. The main reason is that large-capacity turbines are equipped with large-sized blades (hundreds of meters or longer), which necessitates optimization and improvement of the blade heating system's technology, equipment selection, and operation control strategies. Simultaneously, to improve system reliability, simplify system structure and equipment layout, and reduce the safety risks of additional equipment loads on turbine equipment, a monitoring signal acquisition device suitable for large-capacity wind turbine anti-freezing disaster systems is needed to achieve distributed acquisition, centralized management, and transmission of multi-channel signals for remote measurement and control of the high-temperature hot air conditions of the heating medium inside the blades. Summary of the Invention

[0005] The purpose of this invention is to provide a monitoring signal acquisition device for a large-capacity wind turbine anti-freezing disaster system, so as to solve the problem of multi-channel signal acquisition and transmission in the existing technology for blade heating medium temperature and pressure detection and control.

[0006] The technical solution of this utility model is as follows: A monitoring signal acquisition device for a wind turbine anti-freezing disaster system can realize distributed acquisition, centralized management, and transmission of a total of 9 signals (2 temperature signals and 1 pressure signal per blade) from three blades. Three signals from each blade pass coaxially through the blade root inlet plate and are introduced into the monitoring signal acquisition device inside the wind turbine hub. This device is equipped with a signal acquisition and processing module. This module includes a programmable logic controller (PLC), an industrial switch, terminal blocks, and intermediate relays. After centralized conversion and management by the PLC, the 9 signals communicate with the blade heating power control device in the nacelle via the industrial switch and the wind turbine slip ring, realizing remote distributed acquisition, centralized transmission, and control of monitoring signals from the three blades of the wind turbine.

[0007] Specifically, the nine signal lines pass sequentially through the manhole plate at the blade root, and are introduced into the wiring terminals on the back plate via the analog signal port on the bottom plate of the monitoring signal acquisition device; the output terminal of the wiring terminal is connected to the input terminal of the programmable logic controller (PLC), and the output terminal of the PLC is connected to the input terminal of the industrial switch.

[0008] The output of the industrial switch is connected to the blade heating power control device in the nacelle via a network cable passing through the network port on the base plate, enabling remote signal transmission. The industrial switch is also mounted on the back panel and connected to the programmable logic controller (PLC) via a network cable, enabling centralized signal management and remote transmission.

[0009] The programmable logic controller (PLC) is mounted on the back panel and connected to the signal lines inside the blades via terminal blocks, enabling centralized acquisition and conversion of nine signals. The monitoring signal acquisition device consists of a housing comprising a front door, left side panel, right side panel, top cover, bottom panel, and back panel. The front door is equipped with a lock. The left and right side panels each have a first and a second heat sink (forming a heat dissipation module for the monitoring signal acquisition device). The bottom panel has a network port, an analog signal port, and a control power port. The back panel has a 220V control power switch, a 24V power supply, an industrial switch, terminal blocks, a programmable logic controller (PLC), and intermediate relays; the 220V control power switch and the 24V power supply form the power module for the monitoring signal acquisition device, providing power to the device.

[0010] Specifically, the input terminal of the 220V control power switch is connected to an external 220V power supply, and the output terminal is divided into two paths: one path is connected to the input terminal of a 24V power supply, and the other path is connected to the working power input terminal of the first heat sink, the second heat sink, and the intermediate relay; the output terminal of the 24V power supply is connected to the working power terminals of the programmable logic controller (PLC) and the industrial switch, respectively.

[0011] The beneficial effects of this utility model are: the optimized monitoring signal acquisition device centrally acquires, converts and manages 9 operating condition signals from the three blades, simplifies the original system structure and equipment layout, reduces the number of devices, and improves the reliability of system operation. Attached Figure Description

[0012] Figure 1 is a schematic diagram of the unfolded structure of the monitoring signal acquisition device.

[0013] Figure 2 is a schematic diagram of the equipment unit layout inside the base plate of the monitoring signal acquisition device.

[0014] Figure 3 is a schematic diagram of the signal monitoring system for wind turbine units to resist freezing disasters.

[0015] Explanation of reference numerals in the attached figures; 1-Front door of the monitoring signal acquisition device; 2-Front door lock; 3-Left side panel of the monitoring signal acquisition device; 4-First heat sink; 5-Base plate of the monitoring signal acquisition device; 6-Base plate network port; 7-Base plate analog signal port; 8-Base plate control power port; 9-Right side panel of the monitoring signal acquisition device; 10-Second heat sink; 11-Top cover of the monitoring signal acquisition device; 12-Back plate of the monitoring signal acquisition device; 13-220V control power switch; 14-24V power supply; 15-Industrial switch; 16-Terminal block; 17-Programmable Logic Controller (PLC); 18-Intermediate relay. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Furthermore, the elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0018] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings: like Figure 1 and Figure 2 As shown, the housing of the monitoring signal acquisition device consists of a front door 1, a left side panel 3, a right side panel 9, a top cover 11, a bottom panel 5, and a back panel 12.

[0019] Front door 1: Equipped with door lock 2, which is locked during normal operation and can be opened with a key or special tools when internal equipment maintenance is required.

[0020] Left side panel 3 and right side panel 9: respectively equipped with a first radiator 4 (i.e. the original left side panel radiator 4) and a second radiator 10 (i.e. the original right side panel radiator 10), used to dissipate the heat generated during the operation of the device and ensure that the equipment works within a suitable temperature range; the first radiator 4 and the second radiator 10 form the heat dissipation module of the monitoring signal acquisition device.

[0021] Base plate 5: It is equipped with network port 6, analog signal port 7, and control power port 8 in sequence. Network port 6 is used to connect the industrial switch 15 to the blade heating power control device in the nacelle, enabling remote signal transmission; analog signal port 7 is used to introduce the 9 signal lines from the three blades; control power port 8 is used to connect to an external 220V power supply.

[0022] Back panel 12: Integrated with a 220V control power switch 13, a 24V power supply 14, an industrial switch 15, terminal blocks 16, a programmable logic controller (PLC) 17, and an intermediate relay 18. The input of the 220V control power switch 13 is connected to an external 220V power supply. The output is divided into two paths: one path connects to the input of the 24V power supply 14, providing 24V DC power to the device; the other path connects to the operating power input of the first heat sink 4, the second heat sink 10, and the intermediate relay 18, providing them with 220V AC power. The output of the 24V power supply 14 is connected to the operating power of the PLC 17 and the industrial switch 15, respectively. The output of the industrial switch 15 is connected to the blade heating power control device in the nacelle via a network cable passing through the network port 6 on the base plate 5, realizing remote signal transmission. The input terminals of terminal 16 are connected to the temperature and pressure signal lines of the three blades respectively (i.e., the nine signal lines in the three blades pass through the manhole plate at the blade root in sequence, and are introduced into the terminal 16 on the back plate 12 through the analog signal port 7 on the bottom plate 5 of the monitoring signal acquisition device). The output terminals are connected to the corresponding I / O modules of the programmable controller PLC17 (i.e., the input terminals of the programmable controller PLC17). The communication network port of the programmable controller PLC17 is connected to the input network port of the industrial switch (15) through a network cable to build an internal communication network for the device. The output network port of the industrial switch 15 is connected to the blade heating power control device in the nacelle through the network port 6 on the bottom plate 5 through a network cable to realize remote signal transmission; the 220V control power switch 13 and the 24V power supply 14 form the power module of the monitoring signal acquisition device to provide power support for the device.

[0023] Example:

[0024] To address the anti-freezing requirements of a 5MW wind turbine generator set in a wind farm, the monitoring signal acquisition device of this utility model is adopted, and the specific implementation is as follows: Signal input: The six temperature signal lines and three pressure signal lines in the three blades pass through the manhole plate at the blade root in sequence, and are introduced into the wiring terminal 16 on the back plate 12 through the analog signal port 7 on the bottom plate 5 of the monitoring signal acquisition device.

[0025] Power supply connection: A 220V working power supply is drawn from the "T" power supply of the blade pitch control power box in the nacelle and connected to the input terminal of the 220V control power switch 13 on the back panel 12 to provide working power for this device.

[0026] Signal transmission: The nine signals introduced from terminal 16 are then connected to the programmable logic controller (PLC) 17 for centralized acquisition and conversion. The signals processed by the PLC 17 are transmitted to the industrial switch 15 via network cable. The output of the industrial switch 15 is then connected to the blade heating power control device in the nacelle via network cable through the network port 6 on the base plate 5, realizing remote centralized transmission and control of signals and ensuring the stable operation of the wind turbine under freezing disasters.

[0027] In summary, this utility model solves the problem of centralized acquisition and transmission of multiple signals for the detection and control of blade heating medium temperature and pressure in large-capacity wind turbine anti-freezing disaster systems by optimizing the structural design of the monitoring signal acquisition device and the signal processing flow. It simplifies the traditional system structure and improves the system's operational reliability, demonstrating significant innovation and practicality. It can be widely applied to wind turbines in mountainous wind farms and other areas prone to freezing, thereby improving the operational reliability and power generation efficiency of wind turbines.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A monitoring signal acquisition device for a wind turbine anti-freezing disaster system, characterized in that, include: The main body of the monitoring signal acquisition device is a box consisting of a front door (1), a left side panel (3), a right side panel (9), a top cover (11), a bottom panel (5), and a back panel (12); The signal acquisition and processing module, located inside the enclosure, includes a programmable logic controller (PLC) (17), an industrial switch (15), a terminal block (16), and an intermediate relay (18), used to acquire, convert, and manage nine signals within the three blades; The power module, located inside the enclosure, includes a 220V control power switch (13) and a 24V power supply (14) to provide power support for the device; The heat dissipation module includes a first radiator (4) and a second radiator (10) respectively installed on the left side plate (3) and the right side plate (9) for dissipating the heat generated during the operation of the device.

2. The monitoring signal acquisition device for a wind turbine anti-freezing disaster system according to claim 1, characterized in that: The nine signal lines in the three blades pass through the manhole plate at the blade root in sequence, and are introduced into the wiring terminal (16) on the back plate (12) through the analog signal port (7) on the bottom plate (5) of the monitoring signal acquisition device; the output end of the wiring terminal (16) is connected to the input end of the programmable controller PLC (17), and the output end of the programmable controller PLC (17) is connected to the input end of the industrial switch (15).

3. The monitoring signal acquisition device for a wind turbine anti-freezing disaster system according to claim 1, characterized in that: The input terminal of the 220V control power switch (13) is connected to an external 220V power supply, and the output terminal is divided into two paths. One path is connected to the input terminal of the 24V power supply (14), and the other path is connected to the working power input terminal of the first heat sink (4), the second heat sink (10), and the intermediate relay (18). The output terminal of the 24V power supply (14) is connected to the working power terminals of the programmable controller PLC (17) and the industrial switch (15), respectively.

4. The monitoring signal acquisition device for a wind turbine anti-freezing disaster system according to claim 1, characterized in that: The output end of the industrial switch (15) is connected to the blade heating power control device in the nacelle through the network cable passing through the network port (6) on the base plate (5) to realize remote signal transmission.

5. A monitoring signal acquisition device for a wind turbine anti-freezing disaster system according to claim 1, characterized in that: The front door (1) of the monitoring signal acquisition device is equipped with a door lock (2) for opening and closing the box; the left side plate (3) and the right side plate (9) are located on both sides of the box, the first radiator (4) is installed on the left side plate (3), and the second radiator (10) is installed on the right side plate (9).

6. The monitoring signal acquisition device for a wind turbine anti-freezing disaster system according to claim 1, characterized in that: The programmable controller (PLC) (17) is mounted on the back panel (12) and connected to the signal line inside the blade through the terminal block (16) to realize centralized acquisition and conversion of 9 signals.

7. A monitoring signal acquisition device for a wind turbine anti-freezing disaster system according to claim 1, characterized in that: The industrial switch (15) is installed on the back panel (12) and connected to the programmable logic controller (PLC) (17) via a network cable to realize centralized management and remote transmission of signals.

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