Paper Title
WIND ENERGY CONVERSION SYSTEMS FOR HYBRID ALGORITHM OF MPPT
Abstract
Under a given wind speed when the load impedance matches with the source impedance there is a possibility of generating maxi mum power by wind energy conversion system. (MPPT) Maximum Power Point Tracking will be complex due to the dynamic behavior of load and wind which keeps varying. In the present work (MPPT) Maximum power-point tracking related to (WG) Wind Generator currently exists, which consists of efficiency buck-type dc/dc converter and a control unit running the MPPT functions with a high efficiency (WG) Wind Generator which operates at a variable speed, great advantage of Maximum Power Point Tracking is it does not require any knowledge of Wind Generator’s high potential feature of measurement of the wind speed. Higher reliability, lower complexity and less mechanical stress of the WG which results as different features (MPPT) Maximum Power Points Tracking and its methods like perturbation and observation (PAO) method and incremental conductance method are conventional. Positive change in power is noticed in respect to correct flow direction of duty cycle of the converter in the power conditioning unit of conversion system of wind energy which is regardless, a part of POA method. According to POA method, under rapidly changing load conditions or atmosphere, maximum power operating point will be slow and there is a possibility of tracking maximum power operation (MPOP) in an incorrect method. The incremental conductance and the negative of present conductance value are compared as per the incremental conductance method. The duty cycle is increased, when the incremental conductance is outstanding when compared to the value of existing conductance, other it will be decreased. Conditions of environment do not permit to feel the variations with this method abnormally, because at steady state its tendency to vary the system condition is very poor. To track the maximum power, a hybrid algorithm is used in order to overcome the above drawbacks. On power variation, according to this method, duty cycle is adjusted based on the variation in rectifier output voltage.
Keywords – MPPT, MPOP, WECS,VSCF, CSCF.