Method for backing up and recovering blade zero point of pitch drive system for wind turbine and pitch drive system for wind turbine

摘要

A pitch drive system for a wind turbine includes a pitch drive motor, a first position detector, a driver, a second position detector, and a controller. When the blades rotate to a mechanical zero position, a position value detected by the first position detector is a first zero point position value. The driver is operable to store the first zero point position value. When the blades rotate to the mechanical zero position, a position value detected by the second position detector is a second zero point position value. The controller is operable to store the second zero point position value. When a corresponding back up command is received, the first zero point position value stored in the driver is backed up into the controller, and the second zero point position value stored in the controller is backed up into the driver respectively.

主权项

1. A method for backing up and recovering a blade zero point of a pitch drive system for a wind turbine, comprising:
when a blade rotates to a mechanical zero position, generating a first zero point positional value with a first position detector; the first zero point positional value being stored by a driver; when the blade rotates to the mechanical zero position, generating a second zero point positional value with a second position detector; the second zero point positional value being stored by a controller; when a corresponding back-up command is received, the first zero point positional value stored in the driver is backed up to the controller; and when the corresponding back-up command is received, the second zero point positional value stored in the controller is backed up to the driver.