Wind turbine provided with a controller for adjusting active annular plane area and the operating method thereof
First Claim
1. A wind turbine with an active annual plane area control mechanism comprising a plurality of blades attached to a rotor for transmitting the wind force acting on the blades to the output shaft of the wind turbine connected to the rotor, wherein each of said blade is divided into a variable length blade part and a blade body fixed to the rotor and connecting to the root of said variable length blade part, and there are provided operating conditions detectors for detecting the operating conditions of the wind turbine, a blade length controller for comparing the detected signals of the operating conditions inputted from said operating conditions detectors with predetermined permissible values of operating conditions and calculating the amounts of active annular plane area and blade length to be adjusted for optimal operation based on the result of comparisons, and a blade length adjusting mechanism for changing blade length based on the calculated blade length inputted from said blade length controller.
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Accused Products
Abstract
A wind turbine which varies an active annular plane area by composing such that blades are attached to a cylindrical rotor movable in the radial direction of the rotor, the blades being reciprocated in the radial direction by means of a blade shifting mechanism connected to the root of each blade, or the blade itself is divided so that the outer one of the divided blade is movable in the radial direction. With the construction, the wind turbine can be operated with a maximum output within the range of evading fatigue failure of the blades and rotor by adjusting the active annular plane area in accordance with wind speed.
37 Citations
6 Claims
- 1. A wind turbine with an active annual plane area control mechanism comprising a plurality of blades attached to a rotor for transmitting the wind force acting on the blades to the output shaft of the wind turbine connected to the rotor, wherein each of said blade is divided into a variable length blade part and a blade body fixed to the rotor and connecting to the root of said variable length blade part, and there are provided operating conditions detectors for detecting the operating conditions of the wind turbine, a blade length controller for comparing the detected signals of the operating conditions inputted from said operating conditions detectors with predetermined permissible values of operating conditions and calculating the amounts of active annular plane area and blade length to be adjusted for optimal operation based on the result of comparisons, and a blade length adjusting mechanism for changing blade length based on the calculated blade length inputted from said blade length controller.
- 5. An operating method of the wind turbine with an active annual plane area control mechanism comprising a plurality of blades attached to a rotor for transmitting the wind force acting on the blades to the output shaft of the wind turbine connected to the rotor, wherein the operating condition of the wind turbine is detected, the detected operating condition signals are compared with predetermined permissible values, the amounts of active annular plane area and blade length to be adjusted for optimal operation concerning the operation condition are calculated, and the blade length is changed so that active annular plane area becomes equal to said calculated value through composing such that each blade is being configured so that blade length can be changed in the total length of the blade or in a certain length from the middle up to the tip of the blade.
Specification