  Wavelet transform is proposed in this paper for detection of islanding and
fault disturbances distributed generation (DG) based power system. An IEEE
14-bus system with DG penetration is considered for the detection of
disturbances under different operating conditions. The power system is a hybrid
combination of photovoltaic, and wind energy system connected to different
buses with different level of penetration. The voltage signal is retrieved at
the point of common coupling (PCC) and processed through wavelet transform to
detect the disturbances. Further, energy and standard deviation (STD) as
performance indices are evaluated and compared with a suitable threshold in
order to analyze a disturbance condition. Again, a comparative analysis between
the existing and proposed detection is studied to prove the better performance
of wavelet transform.
