Wind generating set variable pitch system circuit and back-up power supply protection device
By designing a pitch system circuit of the wind turbine unit and using the switching structure of the microcontroller unit and the relay, the problem of the inability to smoothly paddle when the pitch control shaft cabinet is abnormal is solved, and the function of automatically switching to the backup battery pitch control module is realized to ensure the safe operation of the wind turbine unit.
Patent Information
- Application Number
- CN202422338495.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-25
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-25
AI Technical Summary
In the prior art, when the pitch system of the wind turbine unit uses the main power provided by the driver to flee, it cannot recognize the normal operation of the pitch control shaft cabinet, resulting in the failure to smoothly flee through the main power provided by the driver to flee, which in turn causes danger or even damage to the blades.
A wind turbine pitch system circuit is designed, including microcontroller unit, driver control shaft cabinet verification module, backup battery pitch control module and relay. Through the switching structure of the relay, it is automatically switched to the backup battery pitch control module to control the pitch motor to ensure that the paddle operation can be smoothly performed when the pitch control shaft cabinet is abnormal.
It realizes that when the pitch control shaft cabinet is abnormal, it automatically switches to the backup battery pitch control module to ensure the safe operation of the wind turbine and avoid blade damage.
Smart Images
Figure CN223018800U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pitch control for wind power generation, in particular to a pitch system circuit and a backup power protection device for a wind turbine generator set. Background Art
[0002] At present, the wind power generation industry in China is constantly developing, with a wider distribution area and harsher application environments for wind turbines, such as deserts, seashores, high temperatures or low temperatures, and even being damaged by lightning. Therefore, higher requirements are put forward for the accessories and installations on wind turbines.
[0003] Wind power generation requires strong environmental adaptability, and the pitch system is one of the core parts of wind power generation. At present, the pitch systems of wind turbine generator sets can be divided into two categories from the perspective of execution hardware: electric pitch systems and hydraulic pitch systems. Among them, the electric pitch system is essentially a position-tracking drive system. The pitch system mainly has two functions: First, when the wind speed is greater than the rated wind speed and the blade rotation speed cannot be controlled by the generator electromagnetic torque, the pitch system is used to maintain a constant power output of the wind turbine; Second, when a safety chain failure occurs in the wind turbine, the pitch system needs to immediately feather the blades to ensure the safety of the wind turbine. Feathering means that regardless of the position of the pitch angle, the blades are rotated at a fixed speed to a certain fixed feathering position, and according to the different aerodynamic characteristics of the blades, the feathering position will vary slightly.
[0004] When an external safety chain fails, the control device of the wind turbine generator set issues a feathering command to achieve feathering of the wind turbine. When an internal safety chain fails, the pitch system needs to immediately feather the blades to achieve shutdown of the wind turbine.
[0005] At present, the energy required by the pitch system comes from two aspects. The first is the main power provided by an external driver, and the second is a backup battery. Due to the harsh operating environment of the wind turbine, the main power supply is often interrupted. Generally, a super capacitor is used as the backup battery, which can ensure that the blades can work for a short time in case of sudden accidents such as the loss of the main power supply when an internal safety chain fails, minimize the force on the blades, and quickly enter the feathering position to ensure the safety of the blades.
[0006] However, when feathering is carried out using the main power provided by the driver, the normal operation of the pitch driver control cabinet cannot be recognized, resulting in the inability to smoothly feather the blades through the main power provided by the driver when the pitch driver control cabinet is abnormal, and further causing danger or damage to the blades. Summary of the Utility Model
[0007] In view of the deficiencies existing in the prior art, the utility model provides a wind turbine pitch system circuit and a backup power supply protection device, which solves the problem in the prior art that when the main power provided by the driver is used to adjust the pitch, the normal operation of the pitch control shaft cabinet cannot be identified, resulting in the inability to smoothly adjust the pitch through the main power provided by the driver when the pitch control shaft cabinet is abnormal, thereby causing danger or even damage to the blades.
[0008] At least one embodiment of the utility model provides a wind turbine pitch system circuit, comprising: a micro-control unit, a first power supply terminal, a pitch motor, a common terminal, a first signal terminal, a second signal terminal, a driver control shaft cabinet verification module, a driver pitch control module, a backup battery pitch control module, a relay K1, a relay K2 and a relay K3, wherein:
[0009] The micro-control unit is connected to the first signal terminal and the second signal terminal, and is used to control the first signal terminal and the second signal terminal to send an electrical signal of a preset size under a preset condition;
[0010] The first signal end is connected to the common end through the action coil of the relay K1, and the first signal end is also connected to the common end through the driver control axis cabinet verification module and the action coil of the relay K2 in sequence;
[0011] The second signal end is connected to the first power supply end through the trigger switch of the relay K2, and the second signal end is also connected to the common end through the working coil of the relay K3;
[0012] The driver pitch control module is connected to the pitch motor via a trigger switch of the relay K1;
[0013] The backup battery pitch control module is connected to the pitch motor via the relay K3.
[0014] The technical solution disclosed by the utility model has at least the following beneficial effects:
[0015] During operation, when some preset conditions are met, the micro-control unit controls the first signal port to send out a current signal. At this time, the two ends of the action coil of the relay K1 receive the voltage difference between the current signal and the common end, and then attract to close the trigger switch of the relay K1, so that the driver pitch control module is connected to the pitch motor to control the pitch motor to complete the pitching.
[0016] When some other preset conditions are met, the micro-control unit controls the second signal port to send out a current signal. At this time, the two ends of the action coil of the relay K3 receive the voltage difference between the current signal and the common end, and then attract to close the trigger switch of the relay K3, so that the backup battery pitch control module is connected to the pitch motor to control the pitch motor to complete the pitching.
[0017] When the drive control shaft cabinet fails, the drive control shaft cabinet fault verification module is triggered. At this time, the action coil of relay K2 loses power, causing the trigger switch of relay K2 to close, so that the action coil of relay K3 is connected in parallel to the first power supply end and the common end, and then the trigger switch of relay K3 is attracted, completing the switch to the backup battery pitch control module to control the pitch motor.
[0018] Compared with the prior art, when the pitch control shaft cabinet is abnormal, the circuit can automatically switch to the backup battery pitch control module to control the pitch motor, and the switching structure is simple and practical.
[0019] In a wind turbine pitch system circuit provided by the utility model, it also includes: a timeout protection module, which is connected to the driver pitch control module to enable the backup battery pitch control module to supply power after the driver pitch control module supplies power for more than a preset time.
[0020] The technical solution disclosed by the utility model has at least the following beneficial effects:
[0021] Through the timeout protection module, the driver pitch control module can be protected after the power supply of the driver pitch control module exceeds the preset time, thereby avoiding malfunction of the driver pitch control module and long-term pitch failure.
[0022] In a wind turbine pitch control system circuit provided by the utility model, it also includes: the timeout protection module includes a delay relay K4, and the driver pitch control module is connected to the common end through the action coil of the delay relay K4;
[0023] The trigger switch of the delay relay K4 is connected in parallel with the trigger switch of the relay K2.
[0024] The technical solution disclosed by the utility model has at least the following beneficial effects:
[0025] Through the above settings, when the driver pitch control module is enabled, the delay relay K4 enters the countdown. After the preset time is reached, the delay relay K4 is triggered, and then the trigger switch of relay K4 is closed, so that the action coil of relay K3 is connected in parallel to the first power supply end and the common end, and then the trigger switch of relay K3 is attracted, so that the backup battery pitch control module is connected to the pitch motor to control the pitch motor to achieve the feathering operation.
[0026] In a pitch control system circuit of a wind turbine generator provided by the present utility model, it further includes: a safety chain monitoring module and a second power supply terminal, and the second power supply terminal is connected to a first interface of the safety chain monitoring module through a trigger switch of the relay K1.
[0027] The technical solution publicly provided by the present utility model has at least the following beneficial effects:
[0028] By connecting the second power supply terminal to the first interface of the safety chain monitoring module through the trigger switch of the relay K1, it is possible to detect in real time whether the relay K1 is attracted and whether the micro control unit sends a current signal of a preset magnitude to the first signal terminal.
[0029] In a pitch control system circuit of a wind turbine generator provided by the present utility model: the second power supply terminal is connected to a second interface of the safety chain monitoring module through a trigger switch of the relay K3.
[0030] The technical solution publicly provided by the present utility model has at least the following beneficial effects:
[0031] By connecting the second power supply terminal to the second interface of the safety chain monitoring module through the trigger switch of the relay K3, it is possible to detect in real time whether the relay K3 is attracted and whether the micro control unit sends a current signal of a preset magnitude to the second signal terminal.
[0032] In a pitch control system circuit of a wind turbine generator provided by the present utility model, it further includes: a third power supply terminal and a relay K5, wherein,
[0033] The third power supply terminal is sequentially connected to the common terminal through a trigger switch of the time delay relay K4 and an operating coil of the relay K5;
[0034] The backup battery pitch control module is also connected to the pitch motor through a trigger switch of the relay K5.
[0035] The technical solution publicly provided by the present utility model has at least the following beneficial effects:
[0036] Through the setting of the relay K5, after the drive pitch control module operates for more than a preset duration, the trigger switch of the relay K4 closes, enabling the operating coil of the relay K5 to be powered on, and further enabling the backup battery pitch control module and the pitch motor to be powered on. This circuit can be used as a backup circuit to activate the connection between the backup battery pitch control module and the pitch motor.
[0037] In a pitch system circuit of a wind turbine generator provided by the present utility model: A drive control cabinet calibration module is further connected between a trigger switch of a time-delay relay K4 and an operating coil of a relay K5.
[0038] In a pitch system circuit of a wind turbine generator provided by the present utility model, it further includes: a lightning protection module, and the lightning protection module is connected to the first power supply terminal and the common terminal.
[0039] The present utility model further provides a backup power protection device, including: a device main body and a pitch system circuit of a wind turbine generator as described above. BRIEF DESCRIPTION OF THE DRAWINGS
[0040] Figure 1 It is a main loop logic control diagram of the pitch system circuit of the wind turbine generator according to the present utility model;
[0041] Figure 2 It is a relationship diagram among a backup battery pitch control module, a drive pitch control module and a pitch motor according to the present utility model;
[0042] Figure 3 It is a circuit diagram of the main loop of the pitch system circuit of the wind turbine generator according to the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0043] The principles and features of the present utility model are described below with reference to the accompanying drawings. The examples given are only for explaining the present utility model and are not intended to limit the scope of the present utility model.
[0044] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0045] The present utility model provides a pitch system circuit of a wind turbine generator. Here, please refer to Figure 1 and Figure 2 As shown, it includes: a microcontroller unit, a first power supply terminal, a pitch motor, a common terminal, a first signal terminal, a second signal terminal, a drive control cabinet calibration module, a drive pitch control module, a backup battery pitch control module, a relay K1, a relay K2 and a relay K3. Among them,
[0046] The first power supply terminal is represented by VCC_1 in each drawing, the common terminal is represented by GND, the first signal terminal is represented by Y1, the second signal terminal is represented by Y2, and the drive control cabinet calibration module is represented by 3 RELs connected in series;
[0047] The micro-control unit is connected to the first signal terminal Y1 and the second signal terminal Y2, and is used to control the first signal terminal Y1 and the second signal terminal Y2 to send an electrical signal of a preset size under a preset condition;
[0048] The preset conditions for controlling the first signal terminal Y1 to send an electrical signal of a preset size may be: a main control emergency feathering mode command, a main control disconnection safety chain signal, a driver low-level fault signal, a backup battery low voltage fault signal, a backup battery high voltage fault signal, a battery-powered motor brake power circuit breaker trip signal, a main control and pitch control communication fault signal, a driver control motor overspeed signal, and a backup battery for a driver power supply circuit fault signal;
[0049] The preset conditions for controlling the second signal terminal Y2 to emit an electrical signal of a preset size may be: a high-level fault signal of the driver (unable to complete the propeller drive), a fault signal of the driver ENPO loss, a fault signal of the communication between the pitch PLC and the driver, and a main power supply fault signal.
[0050] The first signal terminal Y1 is connected to the common terminal GND through the action coil of the relay K1. The first signal terminal Y1 is also connected to the common terminal GND through the driver control axis cabinet verification module REL and the action coil of the relay K2 in sequence;
[0051] The second signal terminal Y2 is connected to the first power supply terminal VCC_1 through the trigger switch of the relay K2, and the second signal terminal Y2 is also connected to the common terminal GND through the working coil of the relay K3;
[0052] The driver pitch control module is connected to the pitch motor via a trigger switch of the relay K1;
[0053] The backup battery pitch control module is connected to the pitch motor via the relay K3.
[0054] After adopting the above solution:
[0055] During operation, when some preset conditions are met, the micro-control unit controls the first signal terminal Y1 to send out a current signal. At this time, both ends of the action coil of the relay K1 receive the voltage difference between the current signal and the common terminal GND, and then attract to close the trigger switch of the relay K1, so that the driver pitch control module is connected to the pitch motor to control the pitch motor to complete the pitching.
[0056] When some other preset conditions are met, the micro-control unit controls the second signal terminal Y2 to send out a current signal. At this time, the two ends of the action coil of the relay K3 receive the voltage difference between the current signal and the common terminal GND, and then attract to close the trigger switch of the relay K3, so that the backup battery pitch control module is connected to the pitch motor to control the pitch motor to complete the pitching.
[0057] When the drive control shaft cabinet fails, the drive control shaft cabinet fault verification module is triggered. At this time, the action coil of relay K2 loses power, causing the trigger switch of relay K2 to close, so that the action coil of relay K3 is connected in parallel to the first power supply terminal VCC_1 and the common terminal GND, and then the trigger switch of relay K3 is attracted, completing the switch to the backup battery pitch control module to control the pitch motor.
[0058] Compared with the prior art, when the pitch control shaft cabinet is abnormal, the circuit can automatically switch to the backup battery pitch control module to control the pitch motor, and the switching structure is simple and practical.
[0059] Specifically, the circuit further includes: a timeout protection module, which is connected to the driver pitch control module to enable the backup battery pitch control module to supply power after the driver pitch control module supplies power for more than a preset time.
[0060] Through the timeout protection module, the driver pitch control module can be protected after the power supply of the driver pitch control module exceeds the preset time, thereby avoiding malfunction of the driver pitch control module and long-term pitch failure.
[0061] Specifically, please combine Figure 2 and Figure 3 As shown, the timeout protection module includes a time delay relay K4, and the driver pitch control module is connected to the common terminal GND through the action coil of the time delay relay K4;
[0062] The trigger switch of the delay relay K4 is connected in parallel with the trigger switch of the relay K2.
[0063] Through the above settings, when the driver pitch control module is enabled, the delay relay K4 enters the countdown. After the preset time is reached, the delay relay K4 is triggered, and then the trigger switch of relay K4 is closed, so that the action coil of relay K3 is connected in parallel to the first power supply terminal VCC_1 and the common terminal GND, and then the trigger switch of relay K3 is attracted, so that the backup battery pitch control module is connected to the pitch motor to control the pitch motor to achieve the feathering operation.
[0064] Specifically, the circuit also includes: a safety chain monitoring module and a second power supply terminal. The safety chain monitoring module Figure 3In the figure, T1 is used to represent the second power supply terminal. Figure 3 In the figure, VCC_2 represents the second power supply VCC_2 terminal, which is connected to the first interface I 3.4 of the safety chain monitoring module T1 through the trigger switch of the relay K1.
[0065] By connecting the second power supply terminal VCC_2 to the first interface I 3.4 of the safety chain monitoring module T1 through the trigger switch of the relay K1, it is possible to detect in real time whether the relay K1 is energized and whether the micro-control unit sends a current signal of a preset magnitude to the first signal terminal Y1.
[0066] Specifically, the second power supply end is connected to the second interface I3.7 of the safety chain monitoring module T1 through the trigger switch of the relay K3.
[0067] The second power supply end is connected to the second interface of the safety chain monitoring module through the trigger switch of the relay K3, so as to detect in real time whether the relay K3 is energized and whether the micro-control unit sends a current signal of a preset size to the second signal end Y2.
[0068] Specifically, the circuit further includes: a third power supply terminal and a relay K5, wherein the third power supply terminal is the Q8.0 interface of the module T2 in the figure;
[0069] The third power supply terminal Q8.0 is connected to the common terminal GND via the trigger switch of the delay relay K4 and the action coil of the relay K5 in sequence;
[0070] The backup battery pitch control module is also connected to the pitch motor via a trigger switch of the relay K5.
[0071] Through the setting of relay K5, after the driver pitch control module runs for more than a preset time, the trigger switch of relay K4 is closed, so that the working coil of relay K5 is energized, and then the backup battery pitch control module and the pitch motor are energized. This circuit can be used as a backup circuit to activate the connection between the backup battery pitch control module and the pitch motor.
[0072] Specifically, the driver control axis cabinet verification module REL is also connected between the trigger switch of the delay relay K4 and the action coil of the relay K5.
[0073] Specifically, the circuit further includes: a lightning protection module, which is connected to the first power supply terminal VCC_1 and the common terminal GND.
[0074] The utility model also provides a backup power supply protection device, comprising: a device body and a wind turbine generator set pitch control system circuit as described above.
[0075] In addition, without contradiction, those skilled in the art can combine and integrate different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0076] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.
Claims
1. A wind turbine pitch control system circuit, characterized in that: include: Micro-control unit, first power supply terminal, pitch motor, common terminal, first signal terminal, second signal terminal, driver control axis cabinet verification module, driver pitch control module, backup battery pitch control module, relay K1, relay K2 and relay K3, wherein, The micro-control unit is connected to the first signal terminal and the second signal terminal, and is used to control the first signal terminal and the second signal terminal to send an electrical signal of a preset size under a preset condition; The first signal end is connected to the common end through the action coil of the relay K1, and the first signal end is also connected to the common end through the driver control axis cabinet verification module and the action coil of the relay K2 in sequence; The second signal end is connected to the first power supply end through the trigger switch of the relay K2, and the second signal end is also connected to the common end through the working coil of the relay K3; The driver pitch control module is connected to the pitch motor via a trigger switch of the relay K1; The backup battery pitch control module is connected to the pitch motor via the relay K3.
2. A wind turbine pitch control system circuit according to claim 1, characterized in that: include: A timeout protection module is connected to the driver pitch control module to enable the backup battery pitch control module to supply power after the driver pitch control module supplies power for more than a preset time.
3. A wind turbine pitch control system circuit according to claim 2, characterized in that: include: The timeout protection module includes a time delay relay K4, and the driver pitch control module is connected to the common end through the action coil of the time delay relay K4; The trigger switch of the delay relay K4 is connected in parallel with the trigger switch of the relay K2.
4. A wind turbine pitch control system circuit according to claim 3, characterized in that: Also includes: The safety chain monitoring module and the second power supply end, wherein the second power supply end is connected to the first interface of the safety chain monitoring module through the trigger switch of the relay K1.
5. A wind turbine pitch control system circuit according to claim 4, characterized in that: The second power supply end is connected to the second interface of the safety chain monitoring module through the trigger switch of the relay K3.
6. A wind turbine pitch control system circuit according to claim 5, characterized in that: Also includes: The third power supply terminal and relay K5, wherein, The third power supply end is connected to the common end through the trigger switch of the delay relay K4 and the action coil of the relay K5 in sequence; The backup battery pitch control module is also connected to the pitch motor via a trigger switch of the relay K5.
7. A wind turbine pitch control system circuit according to claim 6, characterized in that: The driver control axis cabinet verification module is also connected between the trigger switch of the delay relay K4 and the action coil of the relay K5.
8. A wind turbine pitch control system circuit according to claim 7, characterized in that: Also includes: A lightning protection module is connected to the first power supply end and the common end.
9. A backup power supply protection device, characterized in that: include: A device body and a wind turbine pitch control system circuit as described in any one of claims 1 to 8.