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A warning method for insufficient feathering energy of variable pitch system of wind power generating set

A technology for wind turbines and insufficient energy, which is applied in the direction of wind turbines, control of wind turbines, and wind power generation. It can solve the problems of wind turbines that cannot ensure that the drive blades are driven to the stop position and lower, and achieve the goal of improving reliability. Effect

Inactive Publication Date: 2019-02-15
CORONA WIND EQUIP BEIJING CO LTD +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method of only judging the energy of the backup power supply can only guarantee emergency feathering under normal working conditions
If the energy required to complete a propeller opening is greater than the energy of the backup power supply due to mechanical reasons when using grid power supply, the system does not give any warning at this time. If the grid fails, the backup power supply cannot guarantee that the propellers will be driven smoothly to stop location, greatly reducing the reliability of wind power unit operation

Method used

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  • A warning method for insufficient feathering energy of variable pitch system of wind power generating set
  • A warning method for insufficient feathering energy of variable pitch system of wind power generating set
  • A warning method for insufficient feathering energy of variable pitch system of wind power generating set

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] The pitch control system applying the wind power generation set pitch control system feathering energy shortage early warning method is controlled by a controller through a field bus.

[0030] figure 1 In the shown embodiment of the pitch control system using a supercapacitor as a backup power supply, the main controller is the main control PLC, and the pitch controller is the pitch change PLC; the main control PLC is connected to the pitch change system through CANopen control, and the pitch change PLC Control the pitch drive via CANopen.

[0031] The inventive method comprises the following steps:

[0032] 1) The main control system sends a start-up command, and the main control system controls the blades at the set speed to reach the acceleration operation angle of the wind turbine impeller from the pitch angle waiting for the unit to run;

[0033] 2) The ...

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Abstract

The invention discloses a full feathering energy shortage early-warning method for a wind generating set variable pitch system. The method comprises the following steps that a master controller transmits a starting command, and the master controller controls paddles to reach intended acceleration positions from standby positions at the set speed; a variable pitch controller calculates energy needed by the system during the period from test beginning to test ending; and the variable pitch controller conducts logical judgment according to calculation values, and whether current energy of a standby power source can meet full feathering of the time or not is judged. According to the full feathering energy shortage early-warning method for the wind generating set variable pitch system, on the basis that an original hardware system is maintained unchanged, calculation of the energy consumed in the paddle opening process of the variable pitch system is achieved through software of the variable pitch controller, and logical judgment is conducted according to the calculation values.

Description

technical field [0001] The invention relates to a control method for a pitch-variable system of a wind turbine. Background technique [0002] The main function of the wind turbine pitch system is to adjust the pitch angle of the blades and change the angle of attack of the airflow on the blades, thereby controlling the output power of the generator, so that the wind turbine has better starting and braking performance , to ensure reliable operation of wind turbines. When the wind turbine or the power grid fails, the pitch control system can control the feathering of the blades and realize the aerodynamic braking of the blades; when the wind speed is higher than the safe operating wind speed, the blades can be feathered to improve the wind turbines Power conditions to avoid damage to wind turbines caused by strong winds. [0003] With the advancement of motor control technology, the electric pitch system has been favored by many wind turbine manufacturers. Most of the existi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D7/02
CPCF03D7/0224F03D7/0252F05B2270/602F05B2270/703F05B2270/707Y02E10/72
Inventor 张百乐许洪华苏晓东张雷
Owner CORONA WIND EQUIP BEIJING CO LTD
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