Title :
A Maximum Power Point Tracking Control Method Suitable for Multi-Parallel-Connected Compact Wind Power Generators with Self-Pitch Controlled Blades
Author :
Mutoh, Nobutoshi ; Nagasawa, Atsushi
Author_Institution :
Graduate Sch., Tokyo Metropolitan Univ.
Abstract :
This paper describes a maximum power point tracking (MPPT) control method for propeller type compact wind power generators with passive self-pitch controlled blades that quickly makes the output current and voltage converge on the maximum power point based on wind speeds detected from an anemometer. The voltage and current output from these wind power generators change variously with wind speeds at locations such roofs of building which are suited to these generators. Transient characteristics of the voltage output from compact wind power generators have two modes caused by the self-pitch controlled blade structure: mode I in which the output voltage hardly increases and mode II in which it rapidly increases. Thus, in order to acquire the generated power effectively, however wind speeds may change, a method to perform the MPPT control while searching for mode II is needed. Thus, by judging the mode from the change of the sign of the time differential of the voltage deviation between sampling times, the MPPT control method is proposed here that makes the output current converge on the maximum point using relationships between the maximum power and optimal current which give the maximum power and the wind speed. Effectiveness of the proposed MPPT control method is verified through simulations and experiments using a wind tunnel apparatus
Keywords :
AC generators; machine control; propellers; tracking; wind turbines; maximum power point tracking control method; multi-parallel-connected compact wind power generators; propeller type compact generators; self-pitch controlled blades; transient characteristics; Blades; Buildings; Character generation; Fluid flow measurement; Power generation; Propellers; Voltage control; Wind energy; Wind energy generation; Wind speed;
Conference_Titel :
IEEE Industrial Electronics, IECON 2006 - 32nd Annual Conference on
Conference_Location :
Paris
Print_ISBN :
1-4244-0390-1
DOI :
10.1109/IECON.2006.347811