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Voltage and frequency fluctuation under variable load or variable wind speed is the key issue to solve in distributed generation based on wind power. Further, harmonic and zero sequence current flow through the generator windings due to connection of nonlinear load deteriorate the power quality of the supply. In this paper a control algorithm known as adaptive vectorial filter (AVF) is developed for the solution of the aforesaid problems. This method lies in the category of frequency lock loop (FLL) rather than phase locked loop (PLL) and having no PI coefficient in the loop filter. Therefore it is easy to tune for that frequency component which is desired at output. The frequency locked loop extracts the frequency of the source voltage which is less affected by sudden changes in the system. Hence it is more suitable than the PLL based techniques in wind based distributed power generation system. The entire system is tested under different operating conditions using field-programmable gate array based controller with MATLAB interface in real time. The dynamic response and steady state response shown by it is found satisfactory.

Enhancement of Power Quality in Wind Based Distributed Generation System Using Adaptive Vectorial Filter