Title :
Performance verification of the inverse-system controller for the variable-speed variable-pitch wind generation system
Author :
Geng, Hua ; Zhou, Honglin ; Zhou, Weisong ; Yang, Geng
Author_Institution :
Dept. of Autom., Tsinghua Univ., Beijing
Abstract :
This paper presents the performance verification results of the inverse-system controller (ISC) which was proposed by us recently for the pitch control of a variable-speed variable-pitch wind generation system (VSVP-WGS). Based on multi-time-scale analysis, the motion of pitch is reduced to a first-order model with non-affine and nonlinear characteristics. Using the inverse-system method, the nonlinear model is further converted to a pseudo-linear one and then can be synthesized simply by linear system approach. A hardware-in-the-loop experimental platform of VSVP-WGS is established for the pitch control study. The wind turbine is emulated by an induction motor with torque control mode. The models of wind speed and pitch regulator are implemented in MATLAB/SIMULINK real-time environment. Experimental results show that, compared with conventional proportional-integral (PI) controller, ISC is simpler to be designed, easier to be stabilized. Also, it can smooth the output power of the VSVP-WGS and reduce the mechanical fatigue of the pitch regulator.
Keywords :
PI control; control system synthesis; linear systems; nonlinear control systems; torque control; wind turbines; MATLAB-SIMULINK; hardware-in-the-loop; inverse-system controller; multitime-scale analysis; nonlinear characteristics; performance verification; pitch regulator; torque control mode; variable-speed variable-pitch wind generation system; wind turbine; Control system synthesis; Control systems; Induction motors; Linear systems; Mathematical model; Motion analysis; Power system modeling; Regulators; Torque control; Wind turbines;
Conference_Titel :
Power Electronics Specialists Conference, 2008. PESC 2008. IEEE
Conference_Location :
Rhodes
Print_ISBN :
978-1-4244-1667-7
Electronic_ISBN :
0275-9306
DOI :
10.1109/PESC.2008.4592465