WIND TURBINE POWER GENERATING APPARATUS AND METHOD OF CONNECTING THE SAME

摘要

A wind turbine power generating apparatus includes a wind turbine rotor including at least one blade; a pitch drive part for changing a pitch angle of the at least one blade; a generator configured to be driven by rotational energy of the wind turbine rotor; a circuit breaker for switching a connection state of the generator with respect to a utility grid; and a controller for controlling the wind turbine power generating apparatus. The controller includes a pitch control part configured to control the pitch drive part in a constant rotation-speed control mode for maintaining a rotation speed of the wind turbine rotor at a target rotation speed, before connection of the generator; a connection-condition determination part configured to determine whether a connection determination condition is satisfied; and a connection-command generation part configured to provide the circuit breaker with a connection command to connect the generator to the utility grid.

主权项

1. A wind turbine power generating apparatus for generating electric power from wind energy, comprising:
a wind turbine rotor including at least one blade; a pitch drive part for changing a pitch angle of the at least one blade; a generator configured to be driven by rotational energy of the wind turbine rotor; a circuit breaker for switching a connection state of the generator with respect to a utility grid; and a controller for controlling the wind turbine power generating apparatus, the controller including a pitch control part configured to control the pitch drive part in a constant rotation-speed control mode for maintaining a rotation speed of the wind turbine rotor at a target rotation speed, before connection of the generator, a connection-condition determination part configured to determine whether a connection determination condition is satisfied, the connection determination condition including at least a first condition that, while the pitch drive part is controlled in the constant rotation-speed control mode, the pitch angle is at a feather side of a connection-determination pitch angle continuously for a period of ΔT1 or longer, and a connection-command generation part configured to provide the circuit breaker with a connection command to connect the generator to the utility grid, if the connection-condition determination part determines that the connection determination condition is satisfied.