US 7,679,208 B1 · Apparatus and system for pitch angle control of wind turbine

Abstract

A pitch control apparatus for controlling the pitch value for a wind power generation system includes a generator comparing unit that calculates an error signal based on a difference between a generator measurement signal corresponding with an operation of the power generation system and a generator reference signal, and a reference pitch calculating unit that calculates a reference pitch value using the error signal. The pitch control apparatus further includes a compensation pitch calculating unit that calculates a compensation pitch value using an error value from the wind power generation system and a pitch calculating unit that calculates a pitch value using the reference pitch value and the compensation pitch value. The error value may be any one of a voltage error value from a direct-current capacitor, a voltage error value from a grid connection point, a speed error value from a rotor, and a frequency error value from a grid connection point.

Claims22

Dependent claims

A pitch control apparatus for controlling a pitch value in a wind power generation system, the pitch control apparatus comprising:

a generator comparing unit configured to calculate an error signal based on a difference between a generator measurement signal and a generator reference signal, the generator measurement signal corresponding with an operation of the power generation system;
a reference pitch calculating unit configured to calculate a reference pitch value using the error signal;
a compensation pitch calculating unit configured to calculate a compensation pitch value using an error value from the wind power generation system;
and
a pitch calculating unit configured to calculate a pitch value using the reference pitch value and the compensation pitch value,
wherein the error value is any one of a voltage error value from a direct-current capacitor included in a power converter unit of the wind power generation system, a voltage error value from a grid connection point of the wind power generation system, a speed error value from a rotor of the wind power generation system, and a frequency error value from a grid connection point of the wind power generation system.

3 more elements

A pitch control system for controlling pitch values in a plurality of wind power generation systems, the pitch control system comprising:

a plurality of pitch control apparatuses;
and
a compensation pitch calculating apparatus configured to calculate an apportion-compensation pitch value by using a voltage error value or a frequency error value calculated at a grid connection point where the plurality of wind power generation systems are connected,
wherein the pitch control apparatus comprises:
a generator comparing unit configured to calculate an error signal based on a difference between a generator measurement signal and a generator reference signal, the generator measurement signal corresponding with an operation of the power generation system;
a reference pitch calculating unit configured to calculate a reference pitch value by using the error signal;
and
a pitch calculating unit configured to calculate a pitch value by using the reference pitch value and the apportion-compensation pitch value calculated by the compensation pitch calculating apparatus.

5 more elements

Dependencies are inferred from the claim text.

Apparatus and system for pitch angle control of wind turbine

Life of this patent

Apparatus and system for pitch angle control of wind turbine

Life of this patent

Abstract

Claims22